/* toke.c * * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "It all comes from here, the stench and the peril." --Frodo */ /* * This file is the lexer for Perl. It's closely linked to the * parser, perly.y. * * The main routine is yylex(), which returns the next token. */ #include "EXTERN.h" #define PERL_IN_TOKE_C #include "perl.h" #define yychar (*PL_yycharp) #define yylval (*PL_yylvalp) static const char ident_too_long[] = "Identifier too long"; static const char commaless_variable_list[] = "comma-less variable list"; static void restore_rsfp(pTHX_ void *f); #ifndef PERL_NO_UTF16_FILTER static I32 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen); static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen); #endif #define XFAKEBRACK 128 #define XENUMMASK 127 #ifdef USE_UTF8_SCRIPTS # define UTF (!IN_BYTES) #else # define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8)) #endif /* In variables named $^X, these are the legal values for X. * 1999-02-27 mjd-perl-patch@plover.com */ #define isCONTROLVAR(x) (isUPPER(x) || strchr("[\\]^_?", (x))) /* On MacOS, respect nonbreaking spaces */ #ifdef MACOS_TRADITIONAL #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t') #else #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t') #endif /* LEX_* are values for PL_lex_state, the state of the lexer. * They are arranged oddly so that the guard on the switch statement * can get by with a single comparison (if the compiler is smart enough). */ /* #define LEX_NOTPARSING 11 is done in perl.h. */ #define LEX_NORMAL 10 /* normal code (ie not within "...") */ #define LEX_INTERPNORMAL 9 /* code within a string, eg "$foo[$x+1]" */ #define LEX_INTERPCASEMOD 8 /* expecting a \U, \Q or \E etc */ #define LEX_INTERPPUSH 7 /* starting a new sublex parse level */ #define LEX_INTERPSTART 6 /* expecting the start of a $var */ /* at end of code, eg "$x" followed by: */ #define LEX_INTERPEND 5 /* ... eg not one of [, { or -> */ #define LEX_INTERPENDMAYBE 4 /* ... eg one of [, { or -> */ #define LEX_INTERPCONCAT 3 /* expecting anything, eg at start of string or after \E, $foo, etc */ #define LEX_INTERPCONST 2 /* NOT USED */ #define LEX_FORMLINE 1 /* expecting a format line */ #define LEX_KNOWNEXT 0 /* next token known; just return it */ #ifdef DEBUGGING static const char* const lex_state_names[] = { "KNOWNEXT", "FORMLINE", "INTERPCONST", "INTERPCONCAT", "INTERPENDMAYBE", "INTERPEND", "INTERPSTART", "INTERPPUSH", "INTERPCASEMOD", "INTERPNORMAL", "NORMAL" }; #endif #ifdef ff_next #undef ff_next #endif #include "keywords.h" /* CLINE is a macro that ensures PL_copline has a sane value */ #ifdef CLINE #undef CLINE #endif #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline)) /* * Convenience functions to return different tokens and prime the * lexer for the next token. They all take an argument. * * TOKEN : generic token (used for '(', DOLSHARP, etc) * OPERATOR : generic operator * AOPERATOR : assignment operator * PREBLOCK : beginning the block after an if, while, foreach, ... * PRETERMBLOCK : beginning a non-code-defining {} block (eg, hash ref) * PREREF : *EXPR where EXPR is not a simple identifier * TERM : expression term * LOOPX : loop exiting command (goto, last, dump, etc) * FTST : file test operator * FUN0 : zero-argument function * FUN1 : not used, except for not, which isn't a UNIOP * BOop : bitwise or or xor * BAop : bitwise and * SHop : shift operator * PWop : power operator * PMop : pattern-matching operator * Aop : addition-level operator * Mop : multiplication-level operator * Eop : equality-testing operator * Rop : relational operator <= != gt * * Also see LOP and lop() below. */ #ifdef DEBUGGING /* Serve -DT. */ # define REPORT(retval) tokereport((I32)retval) #else # define REPORT(retval) (retval) #endif #define TOKEN(retval) return ( PL_bufptr = s, REPORT(retval)) #define OPERATOR(retval) return (PL_expect = XTERM, PL_bufptr = s, REPORT(retval)) #define AOPERATOR(retval) return ao((PL_expect = XTERM, PL_bufptr = s, REPORT(retval))) #define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s, REPORT(retval)) #define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s, REPORT(retval)) #define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s, REPORT(retval)) #define TERM(retval) return (CLINE, PL_expect = XOPERATOR, PL_bufptr = s, REPORT(retval)) #define LOOPX(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)LOOPEX)) #define FTST(f) return (yylval.ival=f, PL_expect=XTERMORDORDOR, PL_bufptr=s, REPORT((int)UNIOP)) #define FUN0(f) return (yylval.ival=f, PL_expect=XOPERATOR, PL_bufptr=s, REPORT((int)FUNC0)) #define FUN1(f) return (yylval.ival=f, PL_expect=XOPERATOR, PL_bufptr=s, REPORT((int)FUNC1)) #define BOop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)BITOROP))) #define BAop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)BITANDOP))) #define SHop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)SHIFTOP))) #define PWop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)POWOP))) #define PMop(f) return(yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)MATCHOP)) #define Aop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)ADDOP))) #define Mop(f) return ao((yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)MULOP))) #define Eop(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)EQOP)) #define Rop(f) return (yylval.ival=f, PL_expect=XTERM, PL_bufptr=s, REPORT((int)RELOP)) /* This bit of chicanery makes a unary function followed by * a parenthesis into a function with one argument, highest precedence. * The UNIDOR macro is for unary functions that can be followed by the // * operator (such as C). */ #define UNI2(f,x) { \ yylval.ival = f; \ PL_expect = x; \ PL_bufptr = s; \ PL_last_uni = PL_oldbufptr; \ PL_last_lop_op = f; \ if (*s == '(') \ return REPORT( (int)FUNC1 ); \ s = skipspace(s); \ return REPORT( *s=='(' ? (int)FUNC1 : (int)UNIOP ); \ } #define UNI(f) UNI2(f,XTERM) #define UNIDOR(f) UNI2(f,XTERMORDORDOR) #define UNIBRACK(f) { \ yylval.ival = f; \ PL_bufptr = s; \ PL_last_uni = PL_oldbufptr; \ if (*s == '(') \ return REPORT( (int)FUNC1 ); \ s = skipspace(s); \ return REPORT( (*s == '(') ? (int)FUNC1 : (int)UNIOP ); \ } /* grandfather return to old style */ #define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP) #ifdef DEBUGGING /* how to interpret the yylval associated with the token */ enum token_type { TOKENTYPE_NONE, TOKENTYPE_IVAL, TOKENTYPE_OPNUM, /* yylval.ival contains an opcode number */ TOKENTYPE_PVAL, TOKENTYPE_OPVAL, TOKENTYPE_GVVAL }; static struct debug_tokens { const int token; enum token_type type; const char *name; } const debug_tokens[] = { { ADDOP, TOKENTYPE_OPNUM, "ADDOP" }, { ANDAND, TOKENTYPE_NONE, "ANDAND" }, { ANDOP, TOKENTYPE_NONE, "ANDOP" }, { ANONSUB, TOKENTYPE_IVAL, "ANONSUB" }, { ARROW, TOKENTYPE_NONE, "ARROW" }, { ASSIGNOP, TOKENTYPE_OPNUM, "ASSIGNOP" }, { BITANDOP, TOKENTYPE_OPNUM, "BITANDOP" }, { BITOROP, TOKENTYPE_OPNUM, "BITOROP" }, { COLONATTR, TOKENTYPE_NONE, "COLONATTR" }, { CONTINUE, TOKENTYPE_NONE, "CONTINUE" }, { DEFAULT, TOKENTYPE_NONE, "DEFAULT" }, { DO, TOKENTYPE_NONE, "DO" }, { DOLSHARP, TOKENTYPE_NONE, "DOLSHARP" }, { DORDOR, TOKENTYPE_NONE, "DORDOR" }, { DOROP, TOKENTYPE_OPNUM, "DOROP" }, { DOTDOT, TOKENTYPE_IVAL, "DOTDOT" }, { ELSE, TOKENTYPE_NONE, "ELSE" }, { ELSIF, TOKENTYPE_IVAL, "ELSIF" }, { EQOP, TOKENTYPE_OPNUM, "EQOP" }, { FOR, TOKENTYPE_IVAL, "FOR" }, { FORMAT, TOKENTYPE_NONE, "FORMAT" }, { FUNC, TOKENTYPE_OPNUM, "FUNC" }, { FUNC0, TOKENTYPE_OPNUM, "FUNC0" }, { FUNC0SUB, TOKENTYPE_OPVAL, "FUNC0SUB" }, { FUNC1, TOKENTYPE_OPNUM, "FUNC1" }, { FUNCMETH, TOKENTYPE_OPVAL, "FUNCMETH" }, { GIVEN, TOKENTYPE_IVAL, "GIVEN" }, { HASHBRACK, TOKENTYPE_NONE, "HASHBRACK" }, { IF, TOKENTYPE_IVAL, "IF" }, { LABEL, TOKENTYPE_PVAL, "LABEL" }, { LOCAL, TOKENTYPE_IVAL, "LOCAL" }, { LOOPEX, TOKENTYPE_OPNUM, "LOOPEX" }, { LSTOP, TOKENTYPE_OPNUM, "LSTOP" }, { LSTOPSUB, TOKENTYPE_OPVAL, "LSTOPSUB" }, { MATCHOP, TOKENTYPE_OPNUM, "MATCHOP" }, { METHOD, TOKENTYPE_OPVAL, "METHOD" }, { MULOP, TOKENTYPE_OPNUM, "MULOP" }, { MY, TOKENTYPE_IVAL, "MY" }, { MYSUB, TOKENTYPE_NONE, "MYSUB" }, { NOAMP, TOKENTYPE_NONE, "NOAMP" }, { NOTOP, TOKENTYPE_NONE, "NOTOP" }, { OROP, TOKENTYPE_IVAL, "OROP" }, { OROR, TOKENTYPE_NONE, "OROR" }, { PACKAGE, TOKENTYPE_NONE, "PACKAGE" }, { PMFUNC, TOKENTYPE_OPVAL, "PMFUNC" }, { POSTDEC, TOKENTYPE_NONE, "POSTDEC" }, { POSTINC, TOKENTYPE_NONE, "POSTINC" }, { POWOP, TOKENTYPE_OPNUM, "POWOP" }, { PREDEC, TOKENTYPE_NONE, "PREDEC" }, { PREINC, TOKENTYPE_NONE, "PREINC" }, { PRIVATEREF, TOKENTYPE_OPVAL, "PRIVATEREF" }, { REFGEN, TOKENTYPE_NONE, "REFGEN" }, { RELOP, TOKENTYPE_OPNUM, "RELOP" }, { SHIFTOP, TOKENTYPE_OPNUM, "SHIFTOP" }, { SUB, TOKENTYPE_NONE, "SUB" }, { THING, TOKENTYPE_OPVAL, "THING" }, { UMINUS, TOKENTYPE_NONE, "UMINUS" }, { UNIOP, TOKENTYPE_OPNUM, "UNIOP" }, { UNIOPSUB, TOKENTYPE_OPVAL, "UNIOPSUB" }, { UNLESS, TOKENTYPE_IVAL, "UNLESS" }, { UNTIL, TOKENTYPE_IVAL, "UNTIL" }, { USE, TOKENTYPE_IVAL, "USE" }, { WHEN, TOKENTYPE_IVAL, "WHEN" }, { WHILE, TOKENTYPE_IVAL, "WHILE" }, { WORD, TOKENTYPE_OPVAL, "WORD" }, { 0, TOKENTYPE_NONE, 0 } }; /* dump the returned token in rv, plus any optional arg in yylval */ STATIC int S_tokereport(pTHX_ I32 rv) { dVAR; if (DEBUG_T_TEST) { const char *name = Nullch; enum token_type type = TOKENTYPE_NONE; const struct debug_tokens *p; SV* const report = newSVpvs("<== "); for (p = debug_tokens; p->token; p++) { if (p->token == (int)rv) { name = p->name; type = p->type; break; } } if (name) Perl_sv_catpv(aTHX_ report, name); else if ((char)rv > ' ' && (char)rv < '~') Perl_sv_catpvf(aTHX_ report, "'%c'", (char)rv); else if (!rv) sv_catpvs(report, "EOF"); else Perl_sv_catpvf(aTHX_ report, "?? %"IVdf, (IV)rv); switch (type) { case TOKENTYPE_NONE: case TOKENTYPE_GVVAL: /* doesn't appear to be used */ break; case TOKENTYPE_IVAL: Perl_sv_catpvf(aTHX_ report, "(ival=%"IVdf")", (IV)yylval.ival); break; case TOKENTYPE_OPNUM: Perl_sv_catpvf(aTHX_ report, "(ival=op_%s)", PL_op_name[yylval.ival]); break; case TOKENTYPE_PVAL: Perl_sv_catpvf(aTHX_ report, "(pval=\"%s\")", yylval.pval); break; case TOKENTYPE_OPVAL: if (yylval.opval) { Perl_sv_catpvf(aTHX_ report, "(opval=op_%s)", PL_op_name[yylval.opval->op_type]); if (yylval.opval->op_type == OP_CONST) { Perl_sv_catpvf(aTHX_ report, " %s", SvPEEK(cSVOPx_sv(yylval.opval))); } } else sv_catpvs(report, "(opval=null)"); break; } PerlIO_printf(Perl_debug_log, "### %s\n\n", SvPV_nolen_const(report)); }; return (int)rv; } /* print the buffer with suitable escapes */ STATIC void S_printbuf(pTHX_ const char* fmt, const char* s) { SV* const tmp = newSVpvs(""); PerlIO_printf(Perl_debug_log, fmt, pv_display(tmp, s, strlen(s), 0, 60)); SvREFCNT_dec(tmp); } #endif /* * S_ao * * This subroutine detects &&=, ||=, and //= and turns an ANDAND, OROR or DORDOR * into an OP_ANDASSIGN, OP_ORASSIGN, or OP_DORASSIGN */ STATIC int S_ao(pTHX_ int toketype) { dVAR; if (*PL_bufptr == '=') { PL_bufptr++; if (toketype == ANDAND) yylval.ival = OP_ANDASSIGN; else if (toketype == OROR) yylval.ival = OP_ORASSIGN; else if (toketype == DORDOR) yylval.ival = OP_DORASSIGN; toketype = ASSIGNOP; } return toketype; } /* * S_no_op * When Perl expects an operator and finds something else, no_op * prints the warning. It always prints " found where * operator expected. It prints "Missing semicolon on previous line?" * if the surprise occurs at the start of the line. "do you need to * predeclare ..." is printed out for code like "sub bar; foo bar $x" * where the compiler doesn't know if foo is a method call or a function. * It prints "Missing operator before end of line" if there's nothing * after the missing operator, or "... before <...>" if there is something * after the missing operator. */ STATIC void S_no_op(pTHX_ const char *what, char *s) { dVAR; char * const oldbp = PL_bufptr; const bool is_first = (PL_oldbufptr == PL_linestart); if (!s) s = oldbp; else PL_bufptr = s; yywarn(Perl_form(aTHX_ "%s found where operator expected", what)); if (ckWARN_d(WARN_SYNTAX)) { if (is_first) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\t(Missing semicolon on previous line?)\n"); else if (PL_oldoldbufptr && isIDFIRST_lazy_if(PL_oldoldbufptr,UTF)) { const char *t; for (t = PL_oldoldbufptr; *t && (isALNUM_lazy_if(t,UTF) || *t == ':'); t++) ; if (t < PL_bufptr && isSPACE(*t)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\t(Do you need to predeclare %.*s?)\n", (int)(t - PL_oldoldbufptr), PL_oldoldbufptr); } else { assert(s >= oldbp); Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\t(Missing operator before %.*s?)\n", (int)(s - oldbp), oldbp); } } PL_bufptr = oldbp; } /* * S_missingterm * Complain about missing quote/regexp/heredoc terminator. * If it's called with (char *)NULL then it cauterizes the line buffer. * If we're in a delimited string and the delimiter is a control * character, it's reformatted into a two-char sequence like ^C. * This is fatal. */ STATIC void S_missingterm(pTHX_ char *s) { dVAR; char tmpbuf[3]; char q; if (s) { char * const nl = strrchr(s,'\n'); if (nl) *nl = '\0'; } else if ( #ifdef EBCDIC iscntrl(PL_multi_close) #else PL_multi_close < 32 || PL_multi_close == 127 #endif ) { *tmpbuf = '^'; tmpbuf[1] = (char)toCTRL(PL_multi_close); tmpbuf[2] = '\0'; s = tmpbuf; } else { *tmpbuf = (char)PL_multi_close; tmpbuf[1] = '\0'; s = tmpbuf; } q = strchr(s,'"') ? '\'' : '"'; Perl_croak(aTHX_ "Can't find string terminator %c%s%c anywhere before EOF",q,s,q); } #define FEATURE_IS_ENABLED(name) \ ((0 != (PL_hints & HINT_LOCALIZE_HH)) \ && S_feature_is_enabled(aTHX_ STR_WITH_LEN(name))) /* * S_feature_is_enabled * Check whether the named feature is enabled. */ STATIC bool S_feature_is_enabled(pTHX_ char *name, STRLEN namelen) { dVAR; HV * const hinthv = GvHV(PL_hintgv); char he_name[32] = "feature_"; (void) strncpy(&he_name[8], name, 24); return (hinthv && hv_exists(hinthv, he_name, 8 + namelen)); } /* * Perl_deprecate */ void Perl_deprecate(pTHX_ const char *s) { if (ckWARN(WARN_DEPRECATED)) Perl_warner(aTHX_ packWARN(WARN_DEPRECATED), "Use of %s is deprecated", s); } void Perl_deprecate_old(pTHX_ const char *s) { /* This function should NOT be called for any new deprecated warnings */ /* Use Perl_deprecate instead */ /* */ /* It is here to maintain backward compatibility with the pre-5.8 */ /* warnings category hierarchy. The "deprecated" category used to */ /* live under the "syntax" category. It is now a top-level category */ /* in its own right. */ if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Use of %s is deprecated", s); } /* * experimental text filters for win32 carriage-returns, utf16-to-utf8 and * utf16-to-utf8-reversed. */ #ifdef PERL_CR_FILTER static void strip_return(SV *sv) { register const char *s = SvPVX_const(sv); register const char * const e = s + SvCUR(sv); /* outer loop optimized to do nothing if there are no CR-LFs */ while (s < e) { if (*s++ == '\r' && *s == '\n') { /* hit a CR-LF, need to copy the rest */ register char *d = s - 1; *d++ = *s++; while (s < e) { if (*s == '\r' && s[1] == '\n') s++; *d++ = *s++; } SvCUR(sv) -= s - d; return; } } } STATIC I32 S_cr_textfilter(pTHX_ int idx, SV *sv, int maxlen) { const I32 count = FILTER_READ(idx+1, sv, maxlen); if (count > 0 && !maxlen) strip_return(sv); return count; } #endif /* * Perl_lex_start * Initialize variables. Uses the Perl save_stack to save its state (for * recursive calls to the parser). */ void Perl_lex_start(pTHX_ SV *line) { dVAR; const char *s; STRLEN len; SAVEI32(PL_lex_dojoin); SAVEI32(PL_lex_brackets); SAVEI32(PL_lex_casemods); SAVEI32(PL_lex_starts); SAVEI32(PL_lex_state); SAVEVPTR(PL_lex_inpat); SAVEI32(PL_lex_inwhat); if (PL_lex_state == LEX_KNOWNEXT) { I32 toke = PL_nexttoke; while (--toke >= 0) { SAVEI32(PL_nexttype[toke]); SAVEVPTR(PL_nextval[toke]); } SAVEI32(PL_nexttoke); } SAVECOPLINE(PL_curcop); SAVEPPTR(PL_bufptr); SAVEPPTR(PL_bufend); SAVEPPTR(PL_oldbufptr); SAVEPPTR(PL_oldoldbufptr); SAVEPPTR(PL_last_lop); SAVEPPTR(PL_last_uni); SAVEPPTR(PL_linestart); SAVESPTR(PL_linestr); SAVEGENERICPV(PL_lex_brackstack); SAVEGENERICPV(PL_lex_casestack); SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp); SAVESPTR(PL_lex_stuff); SAVEI32(PL_lex_defer); SAVEI32(PL_sublex_info.sub_inwhat); SAVESPTR(PL_lex_repl); SAVEINT(PL_expect); SAVEINT(PL_lex_expect); PL_lex_state = LEX_NORMAL; PL_lex_defer = 0; PL_expect = XSTATE; PL_lex_brackets = 0; Newx(PL_lex_brackstack, 120, char); Newx(PL_lex_casestack, 12, char); PL_lex_casemods = 0; *PL_lex_casestack = '\0'; PL_lex_dojoin = 0; PL_lex_starts = 0; PL_lex_stuff = Nullsv; PL_lex_repl = Nullsv; PL_lex_inpat = 0; PL_nexttoke = 0; PL_lex_inwhat = 0; PL_sublex_info.sub_inwhat = 0; PL_linestr = line; if (SvREADONLY(PL_linestr)) PL_linestr = sv_2mortal(newSVsv(PL_linestr)); s = SvPV_const(PL_linestr, len); if (!len || s[len-1] != ';') { if (!(SvFLAGS(PL_linestr) & SVs_TEMP)) PL_linestr = sv_2mortal(newSVsv(PL_linestr)); sv_catpvs(PL_linestr, "\n;"); } SvTEMP_off(PL_linestr); PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr); PL_bufend = PL_bufptr + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; PL_rsfp = 0; } /* * Perl_lex_end * Finalizer for lexing operations. Must be called when the parser is * done with the lexer. */ void Perl_lex_end(pTHX) { dVAR; PL_doextract = FALSE; } /* * S_incline * This subroutine has nothing to do with tilting, whether at windmills * or pinball tables. Its name is short for "increment line". It * increments the current line number in CopLINE(PL_curcop) and checks * to see whether the line starts with a comment of the form * # line 500 "foo.pm" * If so, it sets the current line number and file to the values in the comment. */ STATIC void S_incline(pTHX_ char *s) { dVAR; char *t; char *n; char *e; char ch; CopLINE_inc(PL_curcop); if (*s++ != '#') return; while (SPACE_OR_TAB(*s)) s++; if (strnEQ(s, "line", 4)) s += 4; else return; if (SPACE_OR_TAB(*s)) s++; else return; while (SPACE_OR_TAB(*s)) s++; if (!isDIGIT(*s)) return; n = s; while (isDIGIT(*s)) s++; while (SPACE_OR_TAB(*s)) s++; if (*s == '"' && (t = strchr(s+1, '"'))) { s++; e = t + 1; } else { for (t = s; !isSPACE(*t); t++) ; e = t; } while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f') e++; if (*e != '\n' && *e != '\0') return; /* false alarm */ ch = *t; *t = '\0'; if (t - s > 0) { #ifndef USE_ITHREADS const char * const cf = CopFILE(PL_curcop); STRLEN tmplen = cf ? strlen(cf) : 0; if (tmplen > 7 && strnEQ(cf, "(eval ", 6)) { /* must copy *{"::_<(eval N)[oldfilename:L]"} * to *{"::_ and it knows that the next char is a word char, then * it calls S_force_word to stick the next word into the PL_next lookahead. * * Arguments: * char *start : buffer position (must be within PL_linestr) * int token : PL_next will be this type of bare word (e.g., METHOD,WORD) * int check_keyword : if true, Perl checks to make sure the word isn't * a keyword (do this if the word is a label, e.g. goto FOO) * int allow_pack : if true, : characters will also be allowed (require, * use, etc. do this) * int allow_initial_tick : used by the "sub" lexer only. */ STATIC char * S_force_word(pTHX_ register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick) { dVAR; register char *s; STRLEN len; start = skipspace(start); s = start; if (isIDFIRST_lazy_if(s,UTF) || (allow_pack && *s == ':') || (allow_initial_tick && *s == '\'') ) { s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len); if (check_keyword && keyword(PL_tokenbuf, len)) return start; if (token == METHOD) { s = skipspace(s); if (*s == '(') PL_expect = XTERM; else { PL_expect = XOPERATOR; } } PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, S_newSV_maybe_utf8(aTHX_ PL_tokenbuf, len)); PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE; force_next(token); } return s; } /* * S_force_ident * Called when the lexer wants $foo *foo &foo etc, but the program * text only contains the "foo" portion. The first argument is a pointer * to the "foo", and the second argument is the type symbol to prefix. * Forces the next token to be a "WORD". * Creates the symbol if it didn't already exist (via gv_fetchpv()). */ STATIC void S_force_ident(pTHX_ register const char *s, int kind) { dVAR; if (s && *s) { const STRLEN len = strlen(s); OP* const o = (OP*)newSVOP(OP_CONST, 0, newSVpvn(s, len)); PL_nextval[PL_nexttoke].opval = o; force_next(WORD); if (kind) { o->op_private = OPpCONST_ENTERED; /* XXX see note in pp_entereval() for why we forgo typo warnings if the symbol must be introduced in an eval. GSAR 96-10-12 */ gv_fetchpvn_flags(s, len, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : GV_ADD, kind == '$' ? SVt_PV : kind == '@' ? SVt_PVAV : kind == '%' ? SVt_PVHV : SVt_PVGV ); } } } NV Perl_str_to_version(pTHX_ SV *sv) { NV retval = 0.0; NV nshift = 1.0; STRLEN len; const char *start = SvPV_const(sv,len); const char * const end = start + len; const bool utf = SvUTF8(sv) ? TRUE : FALSE; while (start < end) { STRLEN skip; UV n; if (utf) n = utf8n_to_uvchr((U8*)start, len, &skip, 0); else { n = *(U8*)start; skip = 1; } retval += ((NV)n)/nshift; start += skip; nshift *= 1000; } return retval; } /* * S_force_version * Forces the next token to be a version number. * If the next token appears to be an invalid version number, (e.g. "v2b"), * and if "guessing" is TRUE, then no new token is created (and the caller * must use an alternative parsing method). */ STATIC char * S_force_version(pTHX_ char *s, int guessing) { dVAR; OP *version = Nullop; char *d; s = skipspace(s); d = s; if (*d == 'v') d++; if (isDIGIT(*d)) { while (isDIGIT(*d) || *d == '_' || *d == '.') d++; if (*d == ';' || isSPACE(*d) || *d == '}' || !*d) { SV *ver; s = scan_num(s, &yylval); version = yylval.opval; ver = cSVOPx(version)->op_sv; if (SvPOK(ver) && !SvNIOK(ver)) { SvUPGRADE(ver, SVt_PVNV); SvNV_set(ver, str_to_version(ver)); SvNOK_on(ver); /* hint that it is a version */ } } else if (guessing) return s; } /* NOTE: The parser sees the package name and the VERSION swapped */ PL_nextval[PL_nexttoke].opval = version; force_next(WORD); return s; } /* * S_tokeq * Tokenize a quoted string passed in as an SV. It finds the next * chunk, up to end of string or a backslash. It may make a new * SV containing that chunk (if HINT_NEW_STRING is on). It also * turns \\ into \. */ STATIC SV * S_tokeq(pTHX_ SV *sv) { dVAR; register char *s; register char *send; register char *d; STRLEN len = 0; SV *pv = sv; if (!SvLEN(sv)) goto finish; s = SvPV_force(sv, len); if (SvTYPE(sv) >= SVt_PVIV && SvIVX(sv) == -1) goto finish; send = s + len; while (s < send && *s != '\\') s++; if (s == send) goto finish; d = s; if ( PL_hints & HINT_NEW_STRING ) { pv = sv_2mortal(newSVpvn(SvPVX_const(pv), len)); if (SvUTF8(sv)) SvUTF8_on(pv); } while (s < send) { if (*s == '\\') { if (s + 1 < send && (s[1] == '\\')) s++; /* all that, just for this */ } *d++ = *s++; } *d = '\0'; SvCUR_set(sv, d - SvPVX_const(sv)); finish: if ( PL_hints & HINT_NEW_STRING ) return new_constant(NULL, 0, "q", sv, pv, "q"); return sv; } /* * Now come three functions related to double-quote context, * S_sublex_start, S_sublex_push, and S_sublex_done. They're used when * converting things like "\u\Lgnat" into ucfirst(lc("gnat")). They * interact with PL_lex_state, and create fake ( ... ) argument lists * to handle functions and concatenation. * They assume that whoever calls them will be setting up a fake * join call, because each subthing puts a ',' after it. This lets * "lower \luPpEr" * become * join($, , 'lower ', lcfirst( 'uPpEr', ) ,) * * (I'm not sure whether the spurious commas at the end of lcfirst's * arguments and join's arguments are created or not). */ /* * S_sublex_start * Assumes that yylval.ival is the op we're creating (e.g. OP_LCFIRST). * * Pattern matching will set PL_lex_op to the pattern-matching op to * make (we return THING if yylval.ival is OP_NULL, PMFUNC otherwise). * * OP_CONST and OP_READLINE are easy--just make the new op and return. * * Everything else becomes a FUNC. * * Sets PL_lex_state to LEX_INTERPPUSH unless (ival was OP_NULL or we * had an OP_CONST or OP_READLINE). This just sets us up for a * call to S_sublex_push(). */ STATIC I32 S_sublex_start(pTHX) { dVAR; register const I32 op_type = yylval.ival; if (op_type == OP_NULL) { yylval.opval = PL_lex_op; PL_lex_op = Nullop; return THING; } if (op_type == OP_CONST || op_type == OP_READLINE) { SV *sv = tokeq(PL_lex_stuff); if (SvTYPE(sv) == SVt_PVIV) { /* Overloaded constants, nothing fancy: Convert to SVt_PV: */ STRLEN len; const char *p = SvPV_const(sv, len); SV * const nsv = newSVpvn(p, len); if (SvUTF8(sv)) SvUTF8_on(nsv); SvREFCNT_dec(sv); sv = nsv; } yylval.opval = (OP*)newSVOP(op_type, 0, sv); PL_lex_stuff = Nullsv; /* Allow // "foo" */ if (op_type == OP_READLINE) PL_expect = XTERMORDORDOR; return THING; } PL_sublex_info.super_state = PL_lex_state; PL_sublex_info.sub_inwhat = op_type; PL_sublex_info.sub_op = PL_lex_op; PL_lex_state = LEX_INTERPPUSH; PL_expect = XTERM; if (PL_lex_op) { yylval.opval = PL_lex_op; PL_lex_op = Nullop; return PMFUNC; } else return FUNC; } /* * S_sublex_push * Create a new scope to save the lexing state. The scope will be * ended in S_sublex_done. Returns a '(', starting the function arguments * to the uc, lc, etc. found before. * Sets PL_lex_state to LEX_INTERPCONCAT. */ STATIC I32 S_sublex_push(pTHX) { dVAR; ENTER; PL_lex_state = PL_sublex_info.super_state; SAVEI32(PL_lex_dojoin); SAVEI32(PL_lex_brackets); SAVEI32(PL_lex_casemods); SAVEI32(PL_lex_starts); SAVEI32(PL_lex_state); SAVEVPTR(PL_lex_inpat); SAVEI32(PL_lex_inwhat); SAVECOPLINE(PL_curcop); SAVEPPTR(PL_bufptr); SAVEPPTR(PL_bufend); SAVEPPTR(PL_oldbufptr); SAVEPPTR(PL_oldoldbufptr); SAVEPPTR(PL_last_lop); SAVEPPTR(PL_last_uni); SAVEPPTR(PL_linestart); SAVESPTR(PL_linestr); SAVEGENERICPV(PL_lex_brackstack); SAVEGENERICPV(PL_lex_casestack); PL_linestr = PL_lex_stuff; PL_lex_stuff = Nullsv; PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr); PL_bufend += SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; SAVEFREESV(PL_linestr); PL_lex_dojoin = FALSE; PL_lex_brackets = 0; Newx(PL_lex_brackstack, 120, char); Newx(PL_lex_casestack, 12, char); PL_lex_casemods = 0; *PL_lex_casestack = '\0'; PL_lex_starts = 0; PL_lex_state = LEX_INTERPCONCAT; CopLINE_set(PL_curcop, (line_t)PL_multi_start); PL_lex_inwhat = PL_sublex_info.sub_inwhat; if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST) PL_lex_inpat = PL_sublex_info.sub_op; else PL_lex_inpat = Nullop; return '('; } /* * S_sublex_done * Restores lexer state after a S_sublex_push. */ STATIC I32 S_sublex_done(pTHX) { dVAR; if (!PL_lex_starts++) { SV * const sv = newSVpvs(""); if (SvUTF8(PL_linestr)) SvUTF8_on(sv); PL_expect = XOPERATOR; yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv); return THING; } if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */ PL_lex_state = LEX_INTERPCASEMOD; return yylex(); } /* Is there a right-hand side to take care of? (s//RHS/ or tr//RHS/) */ if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) { PL_linestr = PL_lex_repl; PL_lex_inpat = 0; PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr); PL_bufend += SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; SAVEFREESV(PL_linestr); PL_lex_dojoin = FALSE; PL_lex_brackets = 0; PL_lex_casemods = 0; *PL_lex_casestack = '\0'; PL_lex_starts = 0; if (SvEVALED(PL_lex_repl)) { PL_lex_state = LEX_INTERPNORMAL; PL_lex_starts++; /* we don't clear PL_lex_repl here, so that we can check later whether this is an evalled subst; that means we rely on the logic to ensure sublex_done() is called again only via the branch (in yylex()) that clears PL_lex_repl, else we'll loop */ } else { PL_lex_state = LEX_INTERPCONCAT; PL_lex_repl = Nullsv; } return ','; } else { LEAVE; PL_bufend = SvPVX(PL_linestr); PL_bufend += SvCUR(PL_linestr); PL_expect = XOPERATOR; PL_sublex_info.sub_inwhat = 0; return ')'; } } /* scan_const Extracts a pattern, double-quoted string, or transliteration. This is terrifying code. It looks at lex_inwhat and PL_lex_inpat to find out whether it's processing a pattern (PL_lex_inpat is true), a transliteration (lex_inwhat & OP_TRANS is true), or a double-quoted string. Returns a pointer to the character scanned up to. Iff this is advanced from the start pointer supplied (ie if anything was successfully parsed), will leave an OP for the substring scanned in yylval. Caller must intuit reason for not parsing further by looking at the next characters herself. In patterns: backslashes: double-quoted style: \r and \n regexp special ones: \D \s constants: \x3 backrefs: \1 (deprecated in substitution replacements) case and quoting: \U \Q \E stops on @ and $, but not for $ as tail anchor In transliterations: characters are VERY literal, except for - not at the start or end of the string, which indicates a range. scan_const expands the range to the full set of intermediate characters. In double-quoted strings: backslashes: double-quoted style: \r and \n constants: \x3 backrefs: \1 (deprecated) case and quoting: \U \Q \E stops on @ and $ scan_const does *not* construct ops to handle interpolated strings. It stops processing as soon as it finds an embedded $ or @ variable and leaves it to the caller to work out what's going on. @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @::foo. $ in pattern could be $foo or could be tail anchor. Assumption: it's a tail anchor if $ is the last thing in the string, or if it's followed by one of ")| \n\t" \1 (backreferences) are turned into $1 The structure of the code is while (there's a character to process) { handle transliteration ranges skip regexp comments skip # initiated comments in //x patterns check for embedded @foo check for embedded scalars if (backslash) { leave intact backslashes from leave (below) deprecate \1 in strings and sub replacements handle string-changing backslashes \l \U \Q \E, etc. switch (what was escaped) { handle - in a transliteration (becomes a literal -) handle \132 octal characters handle 0x15 hex characters handle \cV (control V) handle printf backslashes (\f, \r, \n, etc) } (end switch) } (end if backslash) } (end while character to read) */ STATIC char * S_scan_const(pTHX_ char *start) { dVAR; register char *send = PL_bufend; /* end of the constant */ SV *sv = newSV(send - start); /* sv for the constant */ register char *s = start; /* start of the constant */ register char *d = SvPVX(sv); /* destination for copies */ bool dorange = FALSE; /* are we in a translit range? */ bool didrange = FALSE; /* did we just finish a range? */ I32 has_utf8 = FALSE; /* Output constant is UTF8 */ I32 this_utf8 = UTF; /* The source string is assumed to be UTF8 */ UV uv; #ifdef EBCDIC UV literal_endpoint = 0; #endif const char *leaveit = /* set of acceptably-backslashed characters */ PL_lex_inpat ? "\\.^$@AGZdDwWsSbBpPXC+*?|()-nrtfeaxz0123456789[{]} \t\n\r\f\v#" : ""; if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) { /* If we are doing a trans and we know we want UTF8 set expectation */ has_utf8 = PL_sublex_info.sub_op->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF); this_utf8 = PL_sublex_info.sub_op->op_private & (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF); } while (s < send || dorange) { /* get transliterations out of the way (they're most literal) */ if (PL_lex_inwhat == OP_TRANS) { /* expand a range A-Z to the full set of characters. AIE! */ if (dorange) { I32 i; /* current expanded character */ I32 min; /* first character in range */ I32 max; /* last character in range */ if (has_utf8) { char * const c = (char*)utf8_hop((U8*)d, -1); char *e = d++; while (e-- > c) *(e + 1) = *e; *c = (char)UTF_TO_NATIVE(0xff); /* mark the range as done, and continue */ dorange = FALSE; didrange = TRUE; continue; } i = d - SvPVX_const(sv); /* remember current offset */ SvGROW(sv, SvLEN(sv) + 256); /* never more than 256 chars in a range */ d = SvPVX(sv) + i; /* refresh d after realloc */ d -= 2; /* eat the first char and the - */ min = (U8)*d; /* first char in range */ max = (U8)d[1]; /* last char in range */ if (min > max) { Perl_croak(aTHX_ "Invalid range \"%c-%c\" in transliteration operator", (char)min, (char)max); } #ifdef EBCDIC if (literal_endpoint == 2 && ((isLOWER(min) && isLOWER(max)) || (isUPPER(min) && isUPPER(max)))) { if (isLOWER(min)) { for (i = min; i <= max; i++) if (isLOWER(i)) *d++ = NATIVE_TO_NEED(has_utf8,i); } else { for (i = min; i <= max; i++) if (isUPPER(i)) *d++ = NATIVE_TO_NEED(has_utf8,i); } } else #endif for (i = min; i <= max; i++) *d++ = (char)i; /* mark the range as done, and continue */ dorange = FALSE; didrange = TRUE; #ifdef EBCDIC literal_endpoint = 0; #endif continue; } /* range begins (ignore - as first or last char) */ else if (*s == '-' && s+1 < send && s != start) { if (didrange) { Perl_croak(aTHX_ "Ambiguous range in transliteration operator"); } if (has_utf8) { *d++ = (char)UTF_TO_NATIVE(0xff); /* use illegal utf8 byte--see pmtrans */ s++; continue; } dorange = TRUE; s++; } else { didrange = FALSE; #ifdef EBCDIC literal_endpoint = 0; #endif } } /* if we get here, we're not doing a transliteration */ /* skip for regexp comments /(?#comment)/ and code /(?{code})/, except for the last char, which will be done separately. */ else if (*s == '(' && PL_lex_inpat && s[1] == '?') { if (s[2] == '#') { while (s+1 < send && *s != ')') *d++ = NATIVE_TO_NEED(has_utf8,*s++); } else if (s[2] == '{' /* This should match regcomp.c */ || ((s[2] == 'p' || s[2] == '?') && s[3] == '{')) { I32 count = 1; char *regparse = s + (s[2] == '{' ? 3 : 4); char c; while (count && (c = *regparse)) { if (c == '\\' && regparse[1]) regparse++; else if (c == '{') count++; else if (c == '}') count--; regparse++; } if (*regparse != ')') regparse--; /* Leave one char for continuation. */ while (s < regparse) *d++ = NATIVE_TO_NEED(has_utf8,*s++); } } /* likewise skip #-initiated comments in //x patterns */ else if (*s == '#' && PL_lex_inpat && ((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) { while (s+1 < send && *s != '\n') *d++ = NATIVE_TO_NEED(has_utf8,*s++); } /* check for embedded arrays (@foo, @::foo, @'foo, @{foo}, @$foo, @+, @-) */ else if (*s == '@' && s[1] && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1]))) break; /* check for embedded scalars. only stop if we're sure it's a variable. */ else if (*s == '$') { if (!PL_lex_inpat) /* not a regexp, so $ must be var */ break; if (s + 1 < send && !strchr("()| \r\n\t", s[1])) break; /* in regexp, $ might be tail anchor */ } /* End of else if chain - OP_TRANS rejoin rest */ /* backslashes */ if (*s == '\\' && s+1 < send) { s++; /* some backslashes we leave behind */ if (*leaveit && *s && strchr(leaveit, *s)) { *d++ = NATIVE_TO_NEED(has_utf8,'\\'); *d++ = NATIVE_TO_NEED(has_utf8,*s++); continue; } /* deprecate \1 in strings and substitution replacements */ if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat && isDIGIT(*s) && *s != '0' && !isDIGIT(s[1])) { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\\%c better written as $%c", *s, *s); *--s = '$'; break; } /* string-change backslash escapes */ if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) { --s; break; } /* if we get here, it's either a quoted -, or a digit */ switch (*s) { /* quoted - in transliterations */ case '-': if (PL_lex_inwhat == OP_TRANS) { *d++ = *s++; continue; } /* FALL THROUGH */ default: { if (isALNUM(*s) && *s != '_' && ckWARN(WARN_MISC)) Perl_warner(aTHX_ packWARN(WARN_MISC), "Unrecognized escape \\%c passed through", *s); /* default action is to copy the quoted character */ goto default_action; } /* \132 indicates an octal constant */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': { I32 flags = 0; STRLEN len = 3; uv = grok_oct(s, &len, &flags, NULL); s += len; } goto NUM_ESCAPE_INSERT; /* \x24 indicates a hex constant */ case 'x': ++s; if (*s == '{') { char* const e = strchr(s, '}'); I32 flags = PERL_SCAN_ALLOW_UNDERSCORES | PERL_SCAN_DISALLOW_PREFIX; STRLEN len; ++s; if (!e) { yyerror("Missing right brace on \\x{}"); continue; } len = e - s; uv = grok_hex(s, &len, &flags, NULL); s = e + 1; } else { { STRLEN len = 2; I32 flags = PERL_SCAN_DISALLOW_PREFIX; uv = grok_hex(s, &len, &flags, NULL); s += len; } } NUM_ESCAPE_INSERT: /* Insert oct or hex escaped character. * There will always enough room in sv since such * escapes will be longer than any UTF-8 sequence * they can end up as. */ /* We need to map to chars to ASCII before doing the tests to cover EBCDIC */ if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(uv))) { if (!has_utf8 && uv > 255) { /* Might need to recode whatever we have * accumulated so far if it contains any * hibit chars. * * (Can't we keep track of that and avoid * this rescan? --jhi) */ int hicount = 0; U8 *c; for (c = (U8 *) SvPVX(sv); c < (U8 *)d; c++) { if (!NATIVE_IS_INVARIANT(*c)) { hicount++; } } if (hicount) { const STRLEN offset = d - SvPVX_const(sv); U8 *src, *dst; d = SvGROW(sv, SvLEN(sv) + hicount + 1) + offset; src = (U8 *)d - 1; dst = src+hicount; d += hicount; while (src >= (const U8 *)SvPVX_const(sv)) { if (!NATIVE_IS_INVARIANT(*src)) { const U8 ch = NATIVE_TO_ASCII(*src); *dst-- = (U8)UTF8_EIGHT_BIT_LO(ch); *dst-- = (U8)UTF8_EIGHT_BIT_HI(ch); } else { *dst-- = *src; } src--; } } } if (has_utf8 || uv > 255) { d = (char*)uvchr_to_utf8((U8*)d, uv); has_utf8 = TRUE; if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) { PL_sublex_info.sub_op->op_private |= (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF); } } else { *d++ = (char)uv; } } else { *d++ = (char) uv; } continue; /* \N{LATIN SMALL LETTER A} is a named character */ case 'N': ++s; if (*s == '{') { char* e = strchr(s, '}'); SV *res; STRLEN len; const char *str; if (!e) { yyerror("Missing right brace on \\N{}"); e = s - 1; goto cont_scan; } if (e > s + 2 && s[1] == 'U' && s[2] == '+') { /* \N{U+...} */ I32 flags = PERL_SCAN_ALLOW_UNDERSCORES | PERL_SCAN_DISALLOW_PREFIX; s += 3; len = e - s; uv = grok_hex(s, &len, &flags, NULL); s = e + 1; goto NUM_ESCAPE_INSERT; } res = newSVpvn(s + 1, e - s - 1); res = new_constant( Nullch, 0, "charnames", res, Nullsv, "\\N{...}" ); if (has_utf8) sv_utf8_upgrade(res); str = SvPV_const(res,len); #ifdef EBCDIC_NEVER_MIND /* charnames uses pack U and that has been * recently changed to do the below uni->native * mapping, so this would be redundant (and wrong, * the code point would be doubly converted). * But leave this in just in case the pack U change * gets revoked, but the semantics is still * desireable for charnames. --jhi */ { UV uv = utf8_to_uvchr((const U8*)str, 0); if (uv < 0x100) { U8 tmpbuf[UTF8_MAXBYTES+1], *d; d = uvchr_to_utf8(tmpbuf, UNI_TO_NATIVE(uv)); sv_setpvn(res, (char *)tmpbuf, d - tmpbuf); str = SvPV_const(res, len); } } #endif if (!has_utf8 && SvUTF8(res)) { const char * const ostart = SvPVX_const(sv); SvCUR_set(sv, d - ostart); SvPOK_on(sv); *d = '\0'; sv_utf8_upgrade(sv); /* this just broke our allocation above... */ SvGROW(sv, (STRLEN)(send - start)); d = SvPVX(sv) + SvCUR(sv); has_utf8 = TRUE; } if (len > (STRLEN)(e - s + 4)) { /* I _guess_ 4 is \N{} --jhi */ const char * const odest = SvPVX_const(sv); SvGROW(sv, (SvLEN(sv) + len - (e - s + 4))); d = SvPVX(sv) + (d - odest); } Copy(str, d, len, char); d += len; SvREFCNT_dec(res); cont_scan: s = e + 1; } else yyerror("Missing braces on \\N{}"); continue; /* \c is a control character */ case 'c': s++; if (s < send) { U8 c = *s++; #ifdef EBCDIC if (isLOWER(c)) c = toUPPER(c); #endif *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c)); } else { yyerror("Missing control char name in \\c"); } continue; /* printf-style backslashes, formfeeds, newlines, etc */ case 'b': *d++ = NATIVE_TO_NEED(has_utf8,'\b'); break; case 'n': *d++ = NATIVE_TO_NEED(has_utf8,'\n'); break; case 'r': *d++ = NATIVE_TO_NEED(has_utf8,'\r'); break; case 'f': *d++ = NATIVE_TO_NEED(has_utf8,'\f'); break; case 't': *d++ = NATIVE_TO_NEED(has_utf8,'\t'); break; case 'e': *d++ = ASCII_TO_NEED(has_utf8,'\033'); break; case 'a': *d++ = ASCII_TO_NEED(has_utf8,'\007'); break; } /* end switch */ s++; continue; } /* end if (backslash) */ #ifdef EBCDIC else literal_endpoint++; #endif default_action: /* If we started with encoded form, or already know we want it and then encode the next character */ if ((has_utf8 || this_utf8) && !NATIVE_IS_INVARIANT((U8)(*s))) { STRLEN len = 1; const UV uv = (this_utf8) ? utf8n_to_uvchr((U8*)s, send - s, &len, 0) : (UV) ((U8) *s); const STRLEN need = UNISKIP(NATIVE_TO_UNI(uv)); s += len; if (need > len) { /* encoded value larger than old, need extra space (NOTE: SvCUR() not set here) */ const STRLEN off = d - SvPVX_const(sv); d = SvGROW(sv, SvLEN(sv) + (need-len)) + off; } d = (char*)uvchr_to_utf8((U8*)d, uv); has_utf8 = TRUE; } else { *d++ = NATIVE_TO_NEED(has_utf8,*s++); } } /* while loop to process each character */ /* terminate the string and set up the sv */ *d = '\0'; SvCUR_set(sv, d - SvPVX_const(sv)); if (SvCUR(sv) >= SvLEN(sv)) Perl_croak(aTHX_ "panic: constant overflowed allocated space"); SvPOK_on(sv); if (PL_encoding && !has_utf8) { sv_recode_to_utf8(sv, PL_encoding); if (SvUTF8(sv)) has_utf8 = TRUE; } if (has_utf8) { SvUTF8_on(sv); if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) { PL_sublex_info.sub_op->op_private |= (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF); } } /* shrink the sv if we allocated more than we used */ if (SvCUR(sv) + 5 < SvLEN(sv)) { SvPV_shrink_to_cur(sv); } /* return the substring (via yylval) only if we parsed anything */ if (s > PL_bufptr) { if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) ) sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"), sv, Nullsv, ( PL_lex_inwhat == OP_TRANS ? "tr" : ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat) ? "s" : "qq"))); yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv); } else SvREFCNT_dec(sv); return s; } /* S_intuit_more * Returns TRUE if there's more to the expression (e.g., a subscript), * FALSE otherwise. * * It deals with "$foo[3]" and /$foo[3]/ and /$foo[0123456789$]+/ * * ->[ and ->{ return TRUE * { and [ outside a pattern are always subscripts, so return TRUE * if we're outside a pattern and it's not { or [, then return FALSE * if we're in a pattern and the first char is a { * {4,5} (any digits around the comma) returns FALSE * if we're in a pattern and the first char is a [ * [] returns FALSE * [SOMETHING] has a funky algorithm to decide whether it's a * character class or not. It has to deal with things like * /$foo[-3]/ and /$foo[$bar]/ as well as /$foo[$\d]+/ * anything else returns TRUE */ /* This is the one truly awful dwimmer necessary to conflate C and sed. */ STATIC int S_intuit_more(pTHX_ register char *s) { dVAR; if (PL_lex_brackets) return TRUE; if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{')) return TRUE; if (*s != '{' && *s != '[') return FALSE; if (!PL_lex_inpat) return TRUE; /* In a pattern, so maybe we have {n,m}. */ if (*s == '{') { s++; if (!isDIGIT(*s)) return TRUE; while (isDIGIT(*s)) s++; if (*s == ',') s++; while (isDIGIT(*s)) s++; if (*s == '}') return FALSE; return TRUE; } /* On the other hand, maybe we have a character class */ s++; if (*s == ']' || *s == '^') return FALSE; else { /* this is terrifying, and it works */ int weight = 2; /* let's weigh the evidence */ char seen[256]; unsigned char un_char = 255, last_un_char; const char * const send = strchr(s,']'); char tmpbuf[sizeof PL_tokenbuf * 4]; if (!send) /* has to be an expression */ return TRUE; Zero(seen,256,char); if (*s == '$') weight -= 3; else if (isDIGIT(*s)) { if (s[1] != ']') { if (isDIGIT(s[1]) && s[2] == ']') weight -= 10; } else weight -= 100; } for (; s < send; s++) { last_un_char = un_char; un_char = (unsigned char)*s; switch (*s) { case '@': case '&': case '$': weight -= seen[un_char] * 10; if (isALNUM_lazy_if(s+1,UTF)) { int len; scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE); len = (int)strlen(tmpbuf); if (len > 1 && gv_fetchpvn_flags(tmpbuf, len, 0, SVt_PV)) weight -= 100; else weight -= 10; } else if (*s == '$' && s[1] && strchr("[#!%*<>()-=",s[1])) { if (/*{*/ strchr("])} =",s[2])) weight -= 10; else weight -= 1; } break; case '\\': un_char = 254; if (s[1]) { if (strchr("wds]",s[1])) weight += 100; else if (seen['\''] || seen['"']) weight += 1; else if (strchr("rnftbxcav",s[1])) weight += 40; else if (isDIGIT(s[1])) { weight += 40; while (s[1] && isDIGIT(s[1])) s++; } } else weight += 100; break; case '-': if (s[1] == '\\') weight += 50; if (strchr("aA01! ",last_un_char)) weight += 30; if (strchr("zZ79~",s[1])) weight += 30; if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$')) weight -= 5; /* cope with negative subscript */ break; default: if (!isALNUM(last_un_char) && !(last_un_char == '$' || last_un_char == '@' || last_un_char == '&') && isALPHA(*s) && s[1] && isALPHA(s[1])) { char *d = tmpbuf; while (isALPHA(*s)) *d++ = *s++; *d = '\0'; if (keyword(tmpbuf, d - tmpbuf)) weight -= 150; } if (un_char == last_un_char + 1) weight += 5; weight -= seen[un_char]; break; } seen[un_char]++; } if (weight >= 0) /* probably a character class */ return FALSE; } return TRUE; } /* * S_intuit_method * * Does all the checking to disambiguate * foo bar * between foo(bar) and bar->foo. Returns 0 if not a method, otherwise * FUNCMETH (bar->foo(args)) or METHOD (bar->foo args). * * First argument is the stuff after the first token, e.g. "bar". * * Not a method if bar is a filehandle. * Not a method if foo is a subroutine prototyped to take a filehandle. * Not a method if it's really "Foo $bar" * Method if it's "foo $bar" * Not a method if it's really "print foo $bar" * Method if it's really "foo package::" (interpreted as package->foo) * Not a method if bar is known to be a subroutine ("sub bar; foo bar") * Not a method if bar is a filehandle or package, but is quoted with * => */ STATIC int S_intuit_method(pTHX_ char *start, GV *gv, CV *cv) { dVAR; char *s = start + (*start == '$'); char tmpbuf[sizeof PL_tokenbuf]; STRLEN len; GV* indirgv; if (gv) { if (SvTYPE(gv) == SVt_PVGV && GvIO(gv)) return 0; if (cv) { if (SvPOK(cv)) { const char *proto = SvPVX_const(cv); if (proto) { if (*proto == ';') proto++; if (*proto == '*') return 0; } } } else gv = 0; } s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len); /* start is the beginning of the possible filehandle/object, * and s is the end of it * tmpbuf is a copy of it */ if (*start == '$') { if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf)) return 0; s = skipspace(s); PL_bufptr = start; PL_expect = XREF; return *s == '(' ? FUNCMETH : METHOD; } if (!keyword(tmpbuf, len)) { if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') { len -= 2; tmpbuf[len] = '\0'; goto bare_package; } indirgv = gv_fetchpvn_flags(tmpbuf, len, 0, SVt_PVCV); if (indirgv && GvCVu(indirgv)) return 0; /* filehandle or package name makes it a method */ if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) { s = skipspace(s); if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>') return 0; /* no assumptions -- "=>" quotes bearword */ bare_package: PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpvn(tmpbuf,len)); PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE; PL_expect = XTERM; force_next(WORD); PL_bufptr = s; return *s == '(' ? FUNCMETH : METHOD; } } return 0; } /* * S_incl_perldb * Return a string of Perl code to load the debugger. If PERL5DB * is set, it will return the contents of that, otherwise a * compile-time require of perl5db.pl. */ STATIC const char* S_incl_perldb(pTHX) { dVAR; if (PL_perldb) { const char * const pdb = PerlEnv_getenv("PERL5DB"); if (pdb) return pdb; SETERRNO(0,SS_NORMAL); return "BEGIN { require 'perl5db.pl' }"; } return ""; } /* Encoded script support. filter_add() effectively inserts a * 'pre-processing' function into the current source input stream. * Note that the filter function only applies to the current source file * (e.g., it will not affect files 'require'd or 'use'd by this one). * * The datasv parameter (which may be NULL) can be used to pass * private data to this instance of the filter. The filter function * can recover the SV using the FILTER_DATA macro and use it to * store private buffers and state information. * * The supplied datasv parameter is upgraded to a PVIO type * and the IoDIRP/IoANY field is used to store the function pointer, * and IOf_FAKE_DIRP is enabled on datasv to mark this as such. * Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for * private use must be set using malloc'd pointers. */ SV * Perl_filter_add(pTHX_ filter_t funcp, SV *datasv) { dVAR; if (!funcp) return Nullsv; if (!PL_rsfp_filters) PL_rsfp_filters = newAV(); if (!datasv) datasv = newSV(0); SvUPGRADE(datasv, SVt_PVIO); IoANY(datasv) = FPTR2DPTR(void *, funcp); /* stash funcp into spare field */ IoFLAGS(datasv) |= IOf_FAKE_DIRP; DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_add func %p (%s)\n", IoANY(datasv), SvPV_nolen(datasv))); av_unshift(PL_rsfp_filters, 1); av_store(PL_rsfp_filters, 0, datasv) ; return(datasv); } /* Delete most recently added instance of this filter function. */ void Perl_filter_del(pTHX_ filter_t funcp) { dVAR; SV *datasv; #ifdef DEBUGGING DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_del func %p", FPTR2DPTR(XPVIO *, funcp))); #endif if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0) return; /* if filter is on top of stack (usual case) just pop it off */ datasv = FILTER_DATA(AvFILLp(PL_rsfp_filters)); if (IoANY(datasv) == FPTR2DPTR(void *, funcp)) { IoFLAGS(datasv) &= ~IOf_FAKE_DIRP; IoANY(datasv) = (void *)NULL; sv_free(av_pop(PL_rsfp_filters)); return; } /* we need to search for the correct entry and clear it */ Perl_die(aTHX_ "filter_del can only delete in reverse order (currently)"); } /* Invoke the idxth filter function for the current rsfp. */ /* maxlen 0 = read one text line */ I32 Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen) { dVAR; filter_t funcp; SV *datasv = NULL; if (!PL_rsfp_filters) return -1; if (idx > AvFILLp(PL_rsfp_filters)) { /* Any more filters? */ /* Provide a default input filter to make life easy. */ /* Note that we append to the line. This is handy. */ DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_read %d: from rsfp\n", idx)); if (maxlen) { /* Want a block */ int len ; const int old_len = SvCUR(buf_sv); /* ensure buf_sv is large enough */ SvGROW(buf_sv, (STRLEN)(old_len + maxlen)) ; if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){ if (PerlIO_error(PL_rsfp)) return -1; /* error */ else return 0 ; /* end of file */ } SvCUR_set(buf_sv, old_len + len) ; } else { /* Want a line */ if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) { if (PerlIO_error(PL_rsfp)) return -1; /* error */ else return 0 ; /* end of file */ } } return SvCUR(buf_sv); } /* Skip this filter slot if filter has been deleted */ if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef) { DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_read %d: skipped (filter deleted)\n", idx)); return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */ } /* Get function pointer hidden within datasv */ funcp = DPTR2FPTR(filter_t, IoANY(datasv)); DEBUG_P(PerlIO_printf(Perl_debug_log, "filter_read %d: via function %p (%s)\n", idx, datasv, SvPV_nolen_const(datasv))); /* Call function. The function is expected to */ /* call "FILTER_READ(idx+1, buf_sv)" first. */ /* Return: <0:error, =0:eof, >0:not eof */ return (*funcp)(aTHX_ idx, buf_sv, maxlen); } STATIC char * S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append) { dVAR; #ifdef PERL_CR_FILTER if (!PL_rsfp_filters) { filter_add(S_cr_textfilter,NULL); } #endif if (PL_rsfp_filters) { if (!append) SvCUR_set(sv, 0); /* start with empty line */ if (FILTER_READ(0, sv, 0) > 0) return ( SvPVX(sv) ) ; else return Nullch ; } else return (sv_gets(sv, fp, append)); } STATIC HV * S_find_in_my_stash(pTHX_ const char *pkgname, I32 len) { dVAR; GV *gv; if (len == 11 && *pkgname == '_' && strEQ(pkgname, "__PACKAGE__")) return PL_curstash; if (len > 2 && (pkgname[len - 2] == ':' && pkgname[len - 1] == ':') && (gv = gv_fetchpvn_flags(pkgname, len, 0, SVt_PVHV))) { return GvHV(gv); /* Foo:: */ } /* use constant CLASS => 'MyClass' */ if ((gv = gv_fetchpvn_flags(pkgname, len, 0, SVt_PVCV))) { SV *sv; if (GvCV(gv) && (sv = cv_const_sv(GvCV(gv)))) { pkgname = SvPV_nolen_const(sv); } } return gv_stashpv(pkgname, FALSE); } STATIC char * S_tokenize_use(pTHX_ int is_use, char *s) { dVAR; if (PL_expect != XSTATE) yyerror(Perl_form(aTHX_ "\"%s\" not allowed in expression", is_use ? "use" : "no")); s = skipspace(s); if (isDIGIT(*s) || (*s == 'v' && isDIGIT(s[1]))) { s = force_version(s, TRUE); if (*s == ';' || (s = skipspace(s), *s == ';')) { PL_nextval[PL_nexttoke].opval = Nullop; force_next(WORD); } else if (*s == 'v') { s = force_word(s,WORD,FALSE,TRUE,FALSE); s = force_version(s, FALSE); } } else { s = force_word(s,WORD,FALSE,TRUE,FALSE); s = force_version(s, FALSE); } yylval.ival = is_use; return s; } #ifdef DEBUGGING static const char* const exp_name[] = { "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "ATTRBLOCK", "ATTRTERM", "TERMBLOCK", "TERMORDORDOR" }; #endif /* yylex Works out what to call the token just pulled out of the input stream. The yacc parser takes care of taking the ops we return and stitching them into a tree. Returns: PRIVATEREF Structure: if read an identifier if we're in a my declaration croak if they tried to say my($foo::bar) build the ops for a my() declaration if it's an access to a my() variable are we in a sort block? croak if my($a); $a <=> $b build ops for access to a my() variable if in a dq string, and they've said @foo and we can't find @foo croak build ops for a bareword if we already built the token before, use it. */ #ifdef __SC__ #pragma segment Perl_yylex #endif int Perl_yylex(pTHX) { dVAR; register char *s = PL_bufptr; register char *d; STRLEN len; bool bof = FALSE; DEBUG_T( { SV* tmp = newSVpvs(""); PerlIO_printf(Perl_debug_log, "### %"IVdf":LEX_%s/X%s %s\n", (IV)CopLINE(PL_curcop), lex_state_names[PL_lex_state], exp_name[PL_expect], pv_display(tmp, s, strlen(s), 0, 60)); SvREFCNT_dec(tmp); } ); /* check if there's an identifier for us to look at */ if (PL_pending_ident) return REPORT(S_pending_ident(aTHX)); /* no identifier pending identification */ switch (PL_lex_state) { #ifdef COMMENTARY case LEX_NORMAL: /* Some compilers will produce faster */ case LEX_INTERPNORMAL: /* code if we comment these out. */ break; #endif /* when we've already built the next token, just pull it out of the queue */ case LEX_KNOWNEXT: PL_nexttoke--; yylval = PL_nextval[PL_nexttoke]; if (!PL_nexttoke) { PL_lex_state = PL_lex_defer; PL_expect = PL_lex_expect; PL_lex_defer = LEX_NORMAL; } return REPORT(PL_nexttype[PL_nexttoke]); /* interpolated case modifiers like \L \U, including \Q and \E. when we get here, PL_bufptr is at the \ */ case LEX_INTERPCASEMOD: #ifdef DEBUGGING if (PL_bufptr != PL_bufend && *PL_bufptr != '\\') Perl_croak(aTHX_ "panic: INTERPCASEMOD"); #endif /* handle \E or end of string */ if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') { /* if at a \E */ if (PL_lex_casemods) { const char oldmod = PL_lex_casestack[--PL_lex_casemods]; PL_lex_casestack[PL_lex_casemods] = '\0'; if (PL_bufptr != PL_bufend && (oldmod == 'L' || oldmod == 'U' || oldmod == 'Q')) { PL_bufptr += 2; PL_lex_state = LEX_INTERPCONCAT; } return REPORT(')'); } if (PL_bufptr != PL_bufend) PL_bufptr += 2; PL_lex_state = LEX_INTERPCONCAT; return yylex(); } else { DEBUG_T({ PerlIO_printf(Perl_debug_log, "### Saw case modifier\n"); }); s = PL_bufptr + 1; if (s[1] == '\\' && s[2] == 'E') { PL_bufptr = s + 3; PL_lex_state = LEX_INTERPCONCAT; return yylex(); } else { I32 tmp; if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3)) tmp = *s, *s = s[2], s[2] = (char)tmp; /* misordered... */ if ((*s == 'L' || *s == 'U') && (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U'))) { PL_lex_casestack[--PL_lex_casemods] = '\0'; return REPORT(')'); } if (PL_lex_casemods > 10) Renew(PL_lex_casestack, PL_lex_casemods + 2, char); PL_lex_casestack[PL_lex_casemods++] = *s; PL_lex_casestack[PL_lex_casemods] = '\0'; PL_lex_state = LEX_INTERPCONCAT; PL_nextval[PL_nexttoke].ival = 0; force_next('('); if (*s == 'l') PL_nextval[PL_nexttoke].ival = OP_LCFIRST; else if (*s == 'u') PL_nextval[PL_nexttoke].ival = OP_UCFIRST; else if (*s == 'L') PL_nextval[PL_nexttoke].ival = OP_LC; else if (*s == 'U') PL_nextval[PL_nexttoke].ival = OP_UC; else if (*s == 'Q') PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA; else Perl_croak(aTHX_ "panic: yylex"); PL_bufptr = s + 1; } force_next(FUNC); if (PL_lex_starts) { s = PL_bufptr; PL_lex_starts = 0; /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */ if (PL_lex_casemods == 1 && PL_lex_inpat) OPERATOR(','); else Aop(OP_CONCAT); } else return yylex(); } case LEX_INTERPPUSH: return REPORT(sublex_push()); case LEX_INTERPSTART: if (PL_bufptr == PL_bufend) return REPORT(sublex_done()); DEBUG_T({ PerlIO_printf(Perl_debug_log, "### Interpolated variable\n"); }); PL_expect = XTERM; PL_lex_dojoin = (*PL_bufptr == '@'); PL_lex_state = LEX_INTERPNORMAL; if (PL_lex_dojoin) { PL_nextval[PL_nexttoke].ival = 0; force_next(','); force_ident("\"", '$'); PL_nextval[PL_nexttoke].ival = 0; force_next('$'); PL_nextval[PL_nexttoke].ival = 0; force_next('('); PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */ force_next(FUNC); } if (PL_lex_starts++) { s = PL_bufptr; /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */ if (!PL_lex_casemods && PL_lex_inpat) OPERATOR(','); else Aop(OP_CONCAT); } return yylex(); case LEX_INTERPENDMAYBE: if (intuit_more(PL_bufptr)) { PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */ break; } /* FALL THROUGH */ case LEX_INTERPEND: if (PL_lex_dojoin) { PL_lex_dojoin = FALSE; PL_lex_state = LEX_INTERPCONCAT; return REPORT(')'); } if (PL_lex_inwhat == OP_SUBST && PL_linestr == PL_lex_repl && SvEVALED(PL_lex_repl)) { if (PL_bufptr != PL_bufend) Perl_croak(aTHX_ "Bad evalled substitution pattern"); PL_lex_repl = Nullsv; } /* FALLTHROUGH */ case LEX_INTERPCONCAT: #ifdef DEBUGGING if (PL_lex_brackets) Perl_croak(aTHX_ "panic: INTERPCONCAT"); #endif if (PL_bufptr == PL_bufend) return REPORT(sublex_done()); if (SvIVX(PL_linestr) == '\'') { SV *sv = newSVsv(PL_linestr); if (!PL_lex_inpat) sv = tokeq(sv); else if ( PL_hints & HINT_NEW_RE ) sv = new_constant(NULL, 0, "qr", sv, sv, "q"); yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv); s = PL_bufend; } else { s = scan_const(PL_bufptr); if (*s == '\\') PL_lex_state = LEX_INTERPCASEMOD; else PL_lex_state = LEX_INTERPSTART; } if (s != PL_bufptr) { PL_nextval[PL_nexttoke] = yylval; PL_expect = XTERM; force_next(THING); if (PL_lex_starts++) { /* commas only at base level: /$a\Ub$c/ => ($a,uc(b.$c)) */ if (!PL_lex_casemods && PL_lex_inpat) OPERATOR(','); else Aop(OP_CONCAT); } else { PL_bufptr = s; return yylex(); } } return yylex(); case LEX_FORMLINE: PL_lex_state = LEX_NORMAL; s = scan_formline(PL_bufptr); if (!PL_lex_formbrack) goto rightbracket; OPERATOR(';'); } s = PL_bufptr; PL_oldoldbufptr = PL_oldbufptr; PL_oldbufptr = s; retry: switch (*s) { default: if (isIDFIRST_lazy_if(s,UTF)) goto keylookup; Perl_croak(aTHX_ "Unrecognized character \\x%02X", *s & 255); case 4: case 26: goto fake_eof; /* emulate EOF on ^D or ^Z */ case 0: if (!PL_rsfp) { PL_last_uni = 0; PL_last_lop = 0; if (PL_lex_brackets) { yyerror(PL_lex_formbrack ? "Format not terminated" : "Missing right curly or square bracket"); } DEBUG_T( { PerlIO_printf(Perl_debug_log, "### Tokener got EOF\n"); } ); TOKEN(0); } if (s++ < PL_bufend) goto retry; /* ignore stray nulls */ PL_last_uni = 0; PL_last_lop = 0; if (!PL_in_eval && !PL_preambled) { PL_preambled = TRUE; sv_setpv(PL_linestr,incl_perldb()); if (SvCUR(PL_linestr)) sv_catpvs(PL_linestr,";"); if (PL_preambleav){ while(AvFILLp(PL_preambleav) >= 0) { SV *tmpsv = av_shift(PL_preambleav); sv_catsv(PL_linestr, tmpsv); sv_catpvs(PL_linestr, ";"); sv_free(tmpsv); } sv_free((SV*)PL_preambleav); PL_preambleav = NULL; } if (PL_minus_n || PL_minus_p) { sv_catpvs(PL_linestr, "LINE: while (<>) {"); if (PL_minus_l) sv_catpvs(PL_linestr,"chomp;"); if (PL_minus_a) { if (PL_minus_F) { if ((*PL_splitstr == '/' || *PL_splitstr == '\'' || *PL_splitstr == '"') && strchr(PL_splitstr + 1, *PL_splitstr)) Perl_sv_catpvf(aTHX_ PL_linestr, "our @F=split(%s);", PL_splitstr); else { /* "q\0${splitstr}\0" is legal perl. Yes, even NUL bytes can be used as quoting characters. :-) */ const char *splits = PL_splitstr; sv_catpvs(PL_linestr, "our @F=split(q\0"); do { /* Need to \ \s */ if (*splits == '\\') sv_catpvn(PL_linestr, splits, 1); sv_catpvn(PL_linestr, splits, 1); } while (*splits++); /* This loop will embed the trailing NUL of PL_linestr as the last thing it does before terminating. */ sv_catpvs(PL_linestr, ");"); } } else sv_catpvs(PL_linestr,"our @F=split(' ');"); } } if (PL_minus_E) sv_catpvs(PL_linestr,"use feature ':5.10';"); sv_catpvs(PL_linestr, "\n"); PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; if (PERLDB_LINE && PL_curstash != PL_debstash) { SV * const sv = newSV(0); sv_upgrade(sv, SVt_PVMG); sv_setsv(sv,PL_linestr); (void)SvIOK_on(sv); SvIV_set(sv, 0); av_store(CopFILEAVx(PL_curcop),(I32)CopLINE(PL_curcop),sv); } goto retry; } do { bof = PL_rsfp ? TRUE : FALSE; if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) { fake_eof: if (PL_rsfp) { if (PL_preprocess && !PL_in_eval) (void)PerlProc_pclose(PL_rsfp); else if ((PerlIO *)PL_rsfp == PerlIO_stdin()) PerlIO_clearerr(PL_rsfp); else (void)PerlIO_close(PL_rsfp); PL_rsfp = Nullfp; PL_doextract = FALSE; } if (!PL_in_eval && (PL_minus_n || PL_minus_p)) { sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print;}" : ";}"); PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; PL_minus_n = PL_minus_p = 0; goto retry; } PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr); PL_last_lop = PL_last_uni = Nullch; sv_setpvn(PL_linestr,"",0); TOKEN(';'); /* not infinite loop because rsfp is NULL now */ } /* If it looks like the start of a BOM or raw UTF-16, * check if it in fact is. */ else if (bof && (*s == 0 || *(U8*)s == 0xEF || *(U8*)s >= 0xFE || s[1] == 0)) { #ifdef PERLIO_IS_STDIO # ifdef __GNU_LIBRARY__ # if __GNU_LIBRARY__ == 1 /* Linux glibc5 */ # define FTELL_FOR_PIPE_IS_BROKEN # endif # else # ifdef __GLIBC__ # if __GLIBC__ == 1 /* maybe some glibc5 release had it like this? */ # define FTELL_FOR_PIPE_IS_BROKEN # endif # endif # endif #endif #ifdef FTELL_FOR_PIPE_IS_BROKEN /* This loses the possibility to detect the bof * situation on perl -P when the libc5 is being used. * Workaround? Maybe attach some extra state to PL_rsfp? */ if (!PL_preprocess) bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr); #else bof = PerlIO_tell(PL_rsfp) == (Off_t)SvCUR(PL_linestr); #endif if (bof) { PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); s = swallow_bom((U8*)s); } } if (PL_doextract) { /* Incest with pod. */ if (*s == '=' && strnEQ(s, "=cut", 4)) { sv_setpvn(PL_linestr, "", 0); PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; PL_doextract = FALSE; } } incline(s); } while (PL_doextract); PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s; if (PERLDB_LINE && PL_curstash != PL_debstash) { SV * const sv = newSV(0); sv_upgrade(sv, SVt_PVMG); sv_setsv(sv,PL_linestr); (void)SvIOK_on(sv); SvIV_set(sv, 0); av_store(CopFILEAVx(PL_curcop),(I32)CopLINE(PL_curcop),sv); } PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; if (CopLINE(PL_curcop) == 1) { while (s < PL_bufend && isSPACE(*s)) s++; if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */ s++; d = Nullch; if (!PL_in_eval) { if (*s == '#' && *(s+1) == '!') d = s + 2; #ifdef ALTERNATE_SHEBANG else { static char const as[] = ALTERNATE_SHEBANG; if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1)) d = s + (sizeof(as) - 1); } #endif /* ALTERNATE_SHEBANG */ } if (d) { char *ipath; char *ipathend; while (isSPACE(*d)) d++; ipath = d; while (*d && !isSPACE(*d)) d++; ipathend = d; #ifdef ARG_ZERO_IS_SCRIPT if (ipathend > ipath) { /* * HP-UX (at least) sets argv[0] to the script name, * which makes $^X incorrect. And Digital UNIX and Linux, * at least, set argv[0] to the basename of the Perl * interpreter. So, having found "#!", we'll set it right. */ SV * const x = GvSV(gv_fetchpvs("\030", GV_ADD, SVt_PV)); /* $^X */ assert(SvPOK(x) || SvGMAGICAL(x)); if (sv_eq(x, CopFILESV(PL_curcop))) { sv_setpvn(x, ipath, ipathend - ipath); SvSETMAGIC(x); } else { STRLEN blen; STRLEN llen; const char *bstart = SvPV_const(CopFILESV(PL_curcop),blen); const char * const lstart = SvPV_const(x,llen); if (llen < blen) { bstart += blen - llen; if (strnEQ(bstart, lstart, llen) && bstart[-1] == '/') { sv_setpvn(x, ipath, ipathend - ipath); SvSETMAGIC(x); } } } TAINT_NOT; /* $^X is always tainted, but that's OK */ } #endif /* ARG_ZERO_IS_SCRIPT */ /* * Look for options. */ d = instr(s,"perl -"); if (!d) { d = instr(s,"perl"); #if defined(DOSISH) /* avoid getting into infinite loops when shebang * line contains "Perl" rather than "perl" */ if (!d) { for (d = ipathend-4; d >= ipath; --d) { if ((*d == 'p' || *d == 'P') && !ibcmp(d, "perl", 4)) { break; } } if (d < ipath) d = Nullch; } #endif } #ifdef ALTERNATE_SHEBANG /* * If the ALTERNATE_SHEBANG on this system starts with a * character that can be part of a Perl expression, then if * we see it but not "perl", we're probably looking at the * start of Perl code, not a request to hand off to some * other interpreter. Similarly, if "perl" is there, but * not in the first 'word' of the line, we assume the line * contains the start of the Perl program. */ if (d && *s != '#') { const char *c = ipath; while (*c && !strchr("; \t\r\n\f\v#", *c)) c++; if (c < d) d = Nullch; /* "perl" not in first word; ignore */ else *s = '#'; /* Don't try to parse shebang line */ } #endif /* ALTERNATE_SHEBANG */ #ifndef MACOS_TRADITIONAL if (!d && *s == '#' && ipathend > ipath && !PL_minus_c && !instr(s,"indir") && instr(PL_origargv[0],"perl")) { dVAR; char **newargv; *ipathend = '\0'; s = ipathend + 1; while (s < PL_bufend && isSPACE(*s)) s++; if (s < PL_bufend) { Newxz(newargv,PL_origargc+3,char*); newargv[1] = s; while (s < PL_bufend && !isSPACE(*s)) s++; *s = '\0'; Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*); } else newargv = PL_origargv; newargv[0] = ipath; PERL_FPU_PRE_EXEC PerlProc_execv(ipath, EXEC_ARGV_CAST(newargv)); PERL_FPU_POST_EXEC Perl_croak(aTHX_ "Can't exec %s", ipath); } #endif if (d) { while (*d && !isSPACE(*d)) d++; while (SPACE_OR_TAB(*d)) d++; if (*d++ == '-') { const bool switches_done = PL_doswitches; const U32 oldpdb = PL_perldb; const bool oldn = PL_minus_n; const bool oldp = PL_minus_p; do { if (*d == 'M' || *d == 'm' || *d == 'C') { const char * const m = d; while (*d && !isSPACE(*d)) d++; Perl_croak(aTHX_ "Too late for \"-%.*s\" option", (int)(d - m), m); } d = moreswitches(d); } while (d); if (PL_doswitches && !switches_done) { int argc = PL_origargc; char **argv = PL_origargv; do { argc--,argv++; } while (argc && argv[0][0] == '-' && argv[0][1]); init_argv_symbols(argc,argv); } if ((PERLDB_LINE && !oldpdb) || ((PL_minus_n || PL_minus_p) && !(oldn || oldp))) /* if we have already added "LINE: while (<>) {", we must not do it again */ { sv_setpvn(PL_linestr, "", 0); PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; PL_preambled = FALSE; if (PERLDB_LINE) (void)gv_fetchfile(PL_origfilename); goto retry; } } } } } if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) { PL_bufptr = s; PL_lex_state = LEX_FORMLINE; return yylex(); } goto retry; case '\r': #ifdef PERL_STRICT_CR Perl_warn(aTHX_ "Illegal character \\%03o (carriage return)", '\r'); Perl_croak(aTHX_ "\t(Maybe you didn't strip carriage returns after a network transfer?)\n"); #endif case ' ': case '\t': case '\f': case 013: #ifdef MACOS_TRADITIONAL case '\312': #endif s++; goto retry; case '#': case '\n': if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) { if (*s == '#' && s == PL_linestart && PL_in_eval && !PL_rsfp) { /* handle eval qq[#line 1 "foo"\n ...] */ CopLINE_dec(PL_curcop); incline(s); } d = PL_bufend; while (s < d && *s != '\n') s++; if (s < d) s++; else if (s > d) /* Found by Ilya: feed random input to Perl. */ Perl_croak(aTHX_ "panic: input overflow"); incline(s); if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) { PL_bufptr = s; PL_lex_state = LEX_FORMLINE; return yylex(); } } else { *s = '\0'; PL_bufend = s; } goto retry; case '-': if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) { I32 ftst = 0; char tmp; s++; PL_bufptr = s; tmp = *s++; while (s < PL_bufend && SPACE_OR_TAB(*s)) s++; if (strnEQ(s,"=>",2)) { s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE); DEBUG_T( { S_printbuf(aTHX_ "### Saw unary minus before =>, forcing word %s\n", s); } ); OPERATOR('-'); /* unary minus */ } PL_last_uni = PL_oldbufptr; switch (tmp) { case 'r': ftst = OP_FTEREAD; break; case 'w': ftst = OP_FTEWRITE; break; case 'x': ftst = OP_FTEEXEC; break; case 'o': ftst = OP_FTEOWNED; break; case 'R': ftst = OP_FTRREAD; break; case 'W': ftst = OP_FTRWRITE; break; case 'X': ftst = OP_FTREXEC; break; case 'O': ftst = OP_FTROWNED; break; case 'e': ftst = OP_FTIS; break; case 'z': ftst = OP_FTZERO; break; case 's': ftst = OP_FTSIZE; break; case 'f': ftst = OP_FTFILE; break; case 'd': ftst = OP_FTDIR; break; case 'l': ftst = OP_FTLINK; break; case 'p': ftst = OP_FTPIPE; break; case 'S': ftst = OP_FTSOCK; break; case 'u': ftst = OP_FTSUID; break; case 'g': ftst = OP_FTSGID; break; case 'k': ftst = OP_FTSVTX; break; case 'b': ftst = OP_FTBLK; break; case 'c': ftst = OP_FTCHR; break; case 't': ftst = OP_FTTTY; break; case 'T': ftst = OP_FTTEXT; break; case 'B': ftst = OP_FTBINARY; break; case 'M': case 'A': case 'C': gv_fetchpvs("\024",GV_ADD, SVt_PV); switch (tmp) { case 'M': ftst = OP_FTMTIME; break; case 'A': ftst = OP_FTATIME; break; case 'C': ftst = OP_FTCTIME; break; default: break; } break; default: break; } if (ftst) { PL_last_lop_op = (OPCODE)ftst; DEBUG_T( { PerlIO_printf(Perl_debug_log, "### Saw file test %c\n", (int)tmp); } ); FTST(ftst); } else { /* Assume it was a minus followed by a one-letter named * subroutine call (or a -bareword), then. */ DEBUG_T( { PerlIO_printf(Perl_debug_log, "### '-%c' looked like a file test but was not\n", (int) tmp); } ); s = --PL_bufptr; } } { const char tmp = *s++; if (*s == tmp) { s++; if (PL_expect == XOPERATOR) TERM(POSTDEC); else OPERATOR(PREDEC); } else if (*s == '>') { s++; s = skipspace(s); if (isIDFIRST_lazy_if(s,UTF)) { s = force_word(s,METHOD,FALSE,TRUE,FALSE); TOKEN(ARROW); } else if (*s == '$') OPERATOR(ARROW); else TERM(ARROW); } if (PL_expect == XOPERATOR) Aop(OP_SUBTRACT); else { if (isSPACE(*s) || !isSPACE(*PL_bufptr)) check_uni(); OPERATOR('-'); /* unary minus */ } } case '+': { const char tmp = *s++; if (*s == tmp) { s++; if (PL_expect == XOPERATOR) TERM(POSTINC); else OPERATOR(PREINC); } if (PL_expect == XOPERATOR) Aop(OP_ADD); else { if (isSPACE(*s) || !isSPACE(*PL_bufptr)) check_uni(); OPERATOR('+'); } } case '*': if (PL_expect != XOPERATOR) { s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE); PL_expect = XOPERATOR; force_ident(PL_tokenbuf, '*'); if (!*PL_tokenbuf) PREREF('*'); TERM('*'); } s++; if (*s == '*') { s++; PWop(OP_POW); } Mop(OP_MULTIPLY); case '%': if (PL_expect == XOPERATOR) { ++s; Mop(OP_MODULO); } PL_tokenbuf[0] = '%'; s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE); if (!PL_tokenbuf[1]) { PREREF('%'); } PL_pending_ident = '%'; TERM('%'); case '^': s++; BOop(OP_BIT_XOR); case '[': PL_lex_brackets++; /* FALL THROUGH */ case '~': if (s[1] == '~' && (PL_expect == XOPERATOR || PL_expect == XTERMORDORDOR) && FEATURE_IS_ENABLED("~~")) { s += 2; Eop(OP_SMARTMATCH); } case ',': { const char tmp = *s++; OPERATOR(tmp); } case ':': if (s[1] == ':') { len = 0; goto just_a_word_zero_gv; } s++; switch (PL_expect) { OP *attrs; case XOPERATOR: if (!PL_in_my || PL_lex_state != LEX_NORMAL) break; PL_bufptr = s; /* update in case we back off */ goto grabattrs; case XATTRBLOCK: PL_expect = XBLOCK; goto grabattrs; case XATTRTERM: PL_expect = XTERMBLOCK; grabattrs: s = skipspace(s); attrs = Nullop; while (isIDFIRST_lazy_if(s,UTF)) { I32 tmp; d = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len); if (isLOWER(*s) && (tmp = keyword(PL_tokenbuf, len))) { if (tmp < 0) tmp = -tmp; switch (tmp) { case KEY_or: case KEY_and: case KEY_err: case KEY_for: case KEY_unless: case KEY_if: case KEY_while: case KEY_until: goto got_attrs; default: break; } } if (*d == '(') { d = scan_str(d,TRUE,TRUE); if (!d) { /* MUST advance bufptr here to avoid bogus "at end of line" context messages from yyerror(). */ PL_bufptr = s + len; yyerror("Unterminated attribute parameter in attribute list"); if (attrs) op_free(attrs); return REPORT(0); /* EOF indicator */ } } if (PL_lex_stuff) { SV *sv = newSVpvn(s, len); sv_catsv(sv, PL_lex_stuff); attrs = append_elem(OP_LIST, attrs, newSVOP(OP_CONST, 0, sv)); SvREFCNT_dec(PL_lex_stuff); PL_lex_stuff = Nullsv; } else { if (len == 6 && strnEQ(s, "unique", len)) { if (PL_in_my == KEY_our) #ifdef USE_ITHREADS GvUNIQUE_on(cGVOPx_gv(yylval.opval)); #else ; /* skip to avoid loading attributes.pm */ #endif else Perl_croak(aTHX_ "The 'unique' attribute may only be applied to 'our' variables"); } /* NOTE: any CV attrs applied here need to be part of the CVf_BUILTIN_ATTRS define in cv.h! */ else if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len)) CvLVALUE_on(PL_compcv); else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len)) CvLOCKED_on(PL_compcv); else if (!PL_in_my && len == 6 && strnEQ(s, "method", len)) CvMETHOD_on(PL_compcv); else if (!PL_in_my && len == 9 && strnEQ(s, "assertion", len)) CvASSERTION_on(PL_compcv); /* After we've set the flags, it could be argued that we don't need to do the attributes.pm-based setting process, and shouldn't bother appending recognized flags. To experiment with that, uncomment the following "else". (Note that's already been uncommented. That keeps the above-applied built-in attributes from being intercepted (and possibly rejected) by a package's attribute routines, but is justified by the performance win for the common case of applying only built-in attributes.) */ else attrs = append_elem(OP_LIST, attrs, newSVOP(OP_CONST, 0, newSVpvn(s, len))); } s = skipspace(d); if (*s == ':' && s[1] != ':') s = skipspace(s+1); else if (s == d) break; /* require real whitespace or :'s */ } { const char tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */ if (*s != ';' && *s != '}' && *s != tmp && (tmp != '=' || *s != ')')) { const char q = ((*s == '\'') ? '"' : '\''); /* If here for an expression, and parsed no attrs, back off. */ if (tmp == '=' && !attrs) { s = PL_bufptr; break; } /* MUST advance bufptr here to avoid bogus "at end of line" context messages from yyerror(). */ PL_bufptr = s; yyerror( *s ? Perl_form(aTHX_ "Invalid separator character " "%c%c%c in attribute list", q, *s, q) : "Unterminated attribute list" ); if (attrs) op_free(attrs); OPERATOR(':'); } } got_attrs: if (attrs) { PL_nextval[PL_nexttoke].opval = attrs; force_next(THING); } TOKEN(COLONATTR); } OPERATOR(':'); case '(': s++; if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr) PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */ else PL_expect = XTERM; s = skipspace(s); TOKEN('('); case ';': CLINE; { const char tmp = *s++; OPERATOR(tmp); } case ')': { const char tmp = *s++; s = skipspace(s); if (*s == '{') PREBLOCK(tmp); TERM(tmp); } case ']': s++; if (PL_lex_brackets <= 0) yyerror("Unmatched right square bracket"); else --PL_lex_brackets; if (PL_lex_state == LEX_INTERPNORMAL) { if (PL_lex_brackets == 0) { if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>')) PL_lex_state = LEX_INTERPEND; } } TERM(']'); case '{': leftbracket: s++; if (PL_lex_brackets > 100) { Renew(PL_lex_brackstack, PL_lex_brackets + 10, char); } switch (PL_expect) { case XTERM: if (PL_lex_formbrack) { s--; PRETERMBLOCK(DO); } if (PL_oldoldbufptr == PL_last_lop) PL_lex_brackstack[PL_lex_brackets++] = XTERM; else PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR; OPERATOR(HASHBRACK); case XOPERATOR: while (s < PL_bufend && SPACE_OR_TAB(*s)) s++; d = s; PL_tokenbuf[0] = '\0'; if (d < PL_bufend && *d == '-') { PL_tokenbuf[0] = '-'; d++; while (d < PL_bufend && SPACE_OR_TAB(*d)) d++; } if (d < PL_bufend && isIDFIRST_lazy_if(d,UTF)) { d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE, &len); while (d < PL_bufend && SPACE_OR_TAB(*d)) d++; if (*d == '}') { const char minus = (PL_tokenbuf[0] == '-'); s = force_word(s + minus, WORD, FALSE, TRUE, FALSE); if (minus) force_next('-'); } } /* FALL THROUGH */ case XATTRBLOCK: case XBLOCK: PL_lex_brackstack[PL_lex_brackets++] = XSTATE; PL_expect = XSTATE; break; case XATTRTERM: case XTERMBLOCK: PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR; PL_expect = XSTATE; break; default: { const char *t; if (PL_oldoldbufptr == PL_last_lop) PL_lex_brackstack[PL_lex_brackets++] = XTERM; else PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR; s = skipspace(s); if (*s == '}') { if (PL_expect == XREF && PL_lex_state == LEX_INTERPNORMAL) { PL_expect = XTERM; /* This hack is to get the ${} in the message. */ PL_bufptr = s+1; yyerror("syntax error"); break; } OPERATOR(HASHBRACK); } /* This hack serves to disambiguate a pair of curlies * as being a block or an anon hash. Normally, expectation * determines that, but in cases where we're not in a * position to expect anything in particular (like inside * eval"") we have to resolve the ambiguity. This code * covers the case where the first term in the curlies is a * quoted string. Most other cases need to be explicitly * disambiguated by prepending a "+" before the opening * curly in order to force resolution as an anon hash. * * XXX should probably propagate the outer expectation * into eval"" to rely less on this hack, but that could * potentially break current behavior of eval"". * GSAR 97-07-21 */ t = s; if (*s == '\'' || *s == '"' || *s == '`') { /* common case: get past first string, handling escapes */ for (t++; t < PL_bufend && *t != *s;) if (*t++ == '\\' && (*t == '\\' || *t == *s)) t++; t++; } else if (*s == 'q') { if (++t < PL_bufend && (!isALNUM(*t) || ((*t == 'q' || *t == 'x') && ++t < PL_bufend && !isALNUM(*t)))) { /* skip q//-like construct */ const char *tmps; char open, close, term; I32 brackets = 1; while (t < PL_bufend && isSPACE(*t)) t++; /* check for q => */ if (t+1 < PL_bufend && t[0] == '=' && t[1] == '>') { OPERATOR(HASHBRACK); } term = *t; open = term; if (term && (tmps = strchr("([{< )]}> )]}>",term))) term = tmps[5]; close = term; if (open == close) for (t++; t < PL_bufend; t++) { if (*t == '\\' && t+1 < PL_bufend && open != '\\') t++; else if (*t == open) break; } else { for (t++; t < PL_bufend; t++) { if (*t == '\\' && t+1 < PL_bufend) t++; else if (*t == close && --brackets <= 0) break; else if (*t == open) brackets++; } } t++; } else /* skip plain q word */ while (t < PL_bufend && isALNUM_lazy_if(t,UTF)) t += UTF8SKIP(t); } else if (isALNUM_lazy_if(t,UTF)) { t += UTF8SKIP(t); while (t < PL_bufend && isALNUM_lazy_if(t,UTF)) t += UTF8SKIP(t); } while (t < PL_bufend && isSPACE(*t)) t++; /* if comma follows first term, call it an anon hash */ /* XXX it could be a comma expression with loop modifiers */ if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s))) || (*t == '=' && t[1] == '>'))) OPERATOR(HASHBRACK); if (PL_expect == XREF) PL_expect = XTERM; else { PL_lex_brackstack[PL_lex_brackets-1] = XSTATE; PL_expect = XSTATE; } } break; } yylval.ival = CopLINE(PL_curcop); if (isSPACE(*s) || *s == '#') PL_copline = NOLINE; /* invalidate current command line number */ TOKEN('{'); case '}': rightbracket: s++; if (PL_lex_brackets <= 0) yyerror("Unmatched right curly bracket"); else PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets]; if (PL_lex_brackets < PL_lex_formbrack && PL_lex_state != LEX_INTERPNORMAL) PL_lex_formbrack = 0; if (PL_lex_state == LEX_INTERPNORMAL) { if (PL_lex_brackets == 0) { if (PL_expect & XFAKEBRACK) { PL_expect &= XENUMMASK; PL_lex_state = LEX_INTERPEND; PL_bufptr = s; return yylex(); /* ignore fake brackets */ } if (*s == '-' && s[1] == '>') PL_lex_state = LEX_INTERPENDMAYBE; else if (*s != '[' && *s != '{') PL_lex_state = LEX_INTERPEND; } } if (PL_expect & XFAKEBRACK) { PL_expect &= XENUMMASK; PL_bufptr = s; return yylex(); /* ignore fake brackets */ } force_next('}'); TOKEN(';'); case '&': s++; if (*s++ == '&') AOPERATOR(ANDAND); s--; if (PL_expect == XOPERATOR) { if (PL_bufptr == PL_linestart && ckWARN(WARN_SEMICOLON) && isIDFIRST_lazy_if(s,UTF)) { CopLINE_dec(PL_curcop); Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi); CopLINE_inc(PL_curcop); } BAop(OP_BIT_AND); } s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE); if (*PL_tokenbuf) { PL_expect = XOPERATOR; force_ident(PL_tokenbuf, '&'); } else PREREF('&'); yylval.ival = (OPpENTERSUB_AMPER<<8); TERM('&'); case '|': s++; if (*s++ == '|') AOPERATOR(OROR); s--; BOop(OP_BIT_OR); case '=': s++; { const char tmp = *s++; if (tmp == '=') Eop(OP_EQ); if (tmp == '>') OPERATOR(','); if (tmp == '~') PMop(OP_MATCH); if (tmp && isSPACE(*s) && ckWARN(WARN_SYNTAX) && strchr("+-*/%.^&|<",tmp)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Reversed %c= operator",(int)tmp); s--; if (PL_expect == XSTATE && isALPHA(tmp) && (s == PL_linestart+1 || s[-2] == '\n') ) { if (PL_in_eval && !PL_rsfp) { d = PL_bufend; while (s < d) { if (*s++ == '\n') { incline(s); if (strnEQ(s,"=cut",4)) { s = strchr(s,'\n'); if (s) s++; else s = d; incline(s); goto retry; } } } goto retry; } s = PL_bufend; PL_doextract = TRUE; goto retry; } } if (PL_lex_brackets < PL_lex_formbrack) { const char *t; #ifdef PERL_STRICT_CR for (t = s; SPACE_OR_TAB(*t); t++) ; #else for (t = s; SPACE_OR_TAB(*t) || *t == '\r'; t++) ; #endif if (*t == '\n' || *t == '#') { s--; PL_expect = XBLOCK; goto leftbracket; } } yylval.ival = 0; OPERATOR(ASSIGNOP); case '!': s++; { const char tmp = *s++; if (tmp == '=') { /* was this !=~ where !~ was meant? * warn on m:!=~\s+([/?]|[msy]\W|tr\W): */ if (*s == '~' && ckWARN(WARN_SYNTAX)) { const char *t = s+1; while (t < PL_bufend && isSPACE(*t)) ++t; if (*t == '/' || *t == '?' || ((*t == 'm' || *t == 's' || *t == 'y') && !isALNUM(t[1])) || (*t == 't' && t[1] == 'r' && !isALNUM(t[2]))) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "!=~ should be !~"); } Eop(OP_NE); } if (tmp == '~') PMop(OP_NOT); } s--; OPERATOR('!'); case '<': if (PL_expect != XOPERATOR) { if (s[1] != '<' && !strchr(s,'>')) check_uni(); if (s[1] == '<') s = scan_heredoc(s); else s = scan_inputsymbol(s); TERM(sublex_start()); } s++; { char tmp = *s++; if (tmp == '<') SHop(OP_LEFT_SHIFT); if (tmp == '=') { tmp = *s++; if (tmp == '>') Eop(OP_NCMP); s--; Rop(OP_LE); } } s--; Rop(OP_LT); case '>': s++; { const char tmp = *s++; if (tmp == '>') SHop(OP_RIGHT_SHIFT); if (tmp == '=') Rop(OP_GE); } s--; Rop(OP_GT); case '$': CLINE; if (PL_expect == XOPERATOR) { if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) { PL_expect = XTERM; deprecate_old(commaless_variable_list); return REPORT(','); /* grandfather non-comma-format format */ } } if (s[1] == '#' && (isIDFIRST_lazy_if(s+2,UTF) || strchr("{$:+-", s[2]))) { PL_tokenbuf[0] = '@'; s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE); if (PL_expect == XOPERATOR) no_op("Array length", s); if (!PL_tokenbuf[1]) PREREF(DOLSHARP); PL_expect = XOPERATOR; PL_pending_ident = '#'; TOKEN(DOLSHARP); } PL_tokenbuf[0] = '$'; s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE); if (PL_expect == XOPERATOR) no_op("Scalar", s); if (!PL_tokenbuf[1]) { if (s == PL_bufend) yyerror("Final $ should be \\$ or $name"); PREREF('$'); } /* This kludge not intended to be bulletproof. */ if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) { yylval.opval = newSVOP(OP_CONST, 0, newSViv(PL_compiling.cop_arybase)); yylval.opval->op_private = OPpCONST_ARYBASE; TERM(THING); } d = s; { const char tmp = *s; if (PL_lex_state == LEX_NORMAL) s = skipspace(s); if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) { if (*s == '[') { PL_tokenbuf[0] = '@'; if (ckWARN(WARN_SYNTAX)) { char *t; for(t = s + 1; isSPACE(*t) || isALNUM_lazy_if(t,UTF) || *t == '$'; t++) ; if (*t++ == ',') { PL_bufptr = skipspace(PL_bufptr); while (t < PL_bufend && *t != ']') t++; Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Multidimensional syntax %.*s not supported", (int)((t - PL_bufptr) + 1), PL_bufptr); } } } else if (*s == '{') { char *t; PL_tokenbuf[0] = '%'; if (strEQ(PL_tokenbuf+1, "SIG") && ckWARN(WARN_SYNTAX) && (t = strchr(s, '}')) && (t = strchr(t, '='))) { char tmpbuf[sizeof PL_tokenbuf]; for (t++; isSPACE(*t); t++) ; if (isIDFIRST_lazy_if(t,UTF)) { STRLEN len; t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len); for (; isSPACE(*t); t++) ; if (*t == ';' && get_cv(tmpbuf, FALSE)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "You need to quote \"%s\"", tmpbuf); } } } } PL_expect = XOPERATOR; if (PL_lex_state == LEX_NORMAL && isSPACE((char)tmp)) { const bool islop = (PL_last_lop == PL_oldoldbufptr); if (!islop || PL_last_lop_op == OP_GREPSTART) PL_expect = XOPERATOR; else if (strchr("$@\"'`q", *s)) PL_expect = XTERM; /* e.g. print $fh "foo" */ else if (strchr("&*<%", *s) && isIDFIRST_lazy_if(s+1,UTF)) PL_expect = XTERM; /* e.g. print $fh &sub */ else if (isIDFIRST_lazy_if(s,UTF)) { char tmpbuf[sizeof PL_tokenbuf]; int t2; scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len); if ((t2 = keyword(tmpbuf, len))) { /* binary operators exclude handle interpretations */ switch (t2) { case -KEY_x: case -KEY_eq: case -KEY_ne: case -KEY_gt: case -KEY_lt: case -KEY_ge: case -KEY_le: case -KEY_cmp: break; default: PL_expect = XTERM; /* e.g. print $fh length() */ break; } } else { PL_expect = XTERM; /* e.g. print $fh subr() */ } } else if (isDIGIT(*s)) PL_expect = XTERM; /* e.g. print $fh 3 */ else if (*s == '.' && isDIGIT(s[1])) PL_expect = XTERM; /* e.g. print $fh .3 */ else if ((*s == '?' || *s == '-' || *s == '+') && !isSPACE(s[1]) && s[1] != '=') PL_expect = XTERM; /* e.g. print $fh -1 */ else if (*s == '/' && !isSPACE(s[1]) && s[1] != '=' && s[1] != '/') PL_expect = XTERM; /* e.g. print $fh /.../ XXX except DORDOR operator */ else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=') PL_expect = XTERM; /* print $fh <<"EOF" */ } } PL_pending_ident = '$'; TOKEN('$'); case '@': if (PL_expect == XOPERATOR) no_op("Array", s); PL_tokenbuf[0] = '@'; s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE); if (!PL_tokenbuf[1]) { PREREF('@'); } if (PL_lex_state == LEX_NORMAL) s = skipspace(s); if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) { if (*s == '{') PL_tokenbuf[0] = '%'; /* Warn about @ where they meant $. */ if (*s == '[' || *s == '{') { if (ckWARN(WARN_SYNTAX)) { const char *t = s + 1; while (*t && (isALNUM_lazy_if(t,UTF) || strchr(" \t$#+-'\"", *t))) t++; if (*t == '}' || *t == ']') { t++; PL_bufptr = skipspace(PL_bufptr); Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Scalar value %.*s better written as $%.*s", (int)(t-PL_bufptr), PL_bufptr, (int)(t-PL_bufptr-1), PL_bufptr+1); } } } } PL_pending_ident = '@'; TERM('@'); case '/': /* may be division, defined-or, or pattern */ if (PL_expect == XTERMORDORDOR && s[1] == '/') { s += 2; AOPERATOR(DORDOR); } case '?': /* may either be conditional or pattern */ if(PL_expect == XOPERATOR) { char tmp = *s++; if(tmp == '?') { OPERATOR('?'); } else { tmp = *s++; if(tmp == '/') { /* A // operator. */ AOPERATOR(DORDOR); } else { s--; Mop(OP_DIVIDE); } } } else { /* Disable warning on "study /blah/" */ if (PL_oldoldbufptr == PL_last_uni && (*PL_last_uni != 's' || s - PL_last_uni < 5 || memNE(PL_last_uni, "study", 5) || isALNUM_lazy_if(PL_last_uni+5,UTF) )) check_uni(); s = scan_pat(s,OP_MATCH); TERM(sublex_start()); } case '.': if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack #ifdef PERL_STRICT_CR && s[1] == '\n' #else && (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n')) #endif && (s == PL_linestart || s[-1] == '\n') ) { PL_lex_formbrack = 0; PL_expect = XSTATE; goto rightbracket; } if (PL_expect == XOPERATOR || !isDIGIT(s[1])) { char tmp = *s++; if (*s == tmp) { s++; if (*s == tmp) { s++; yylval.ival = OPf_SPECIAL; } else yylval.ival = 0; OPERATOR(DOTDOT); } if (PL_expect != XOPERATOR) check_uni(); Aop(OP_CONCAT); } /* FALL THROUGH */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': s = scan_num(s, &yylval); DEBUG_T( { S_printbuf(aTHX_ "### Saw number in %s\n", s); } ); if (PL_expect == XOPERATOR) no_op("Number",s); TERM(THING); case '\'': s = scan_str(s,FALSE,FALSE); DEBUG_T( { S_printbuf(aTHX_ "### Saw string before %s\n", s); } ); if (PL_expect == XOPERATOR) { if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) { PL_expect = XTERM; deprecate_old(commaless_variable_list); return REPORT(','); /* grandfather non-comma-format format */ } else no_op("String",s); } if (!s) missingterm((char*)0); yylval.ival = OP_CONST; TERM(sublex_start()); case '"': s = scan_str(s,FALSE,FALSE); DEBUG_T( { S_printbuf(aTHX_ "### Saw string before %s\n", s); } ); if (PL_expect == XOPERATOR) { if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) { PL_expect = XTERM; deprecate_old(commaless_variable_list); return REPORT(','); /* grandfather non-comma-format format */ } else no_op("String",s); } if (!s) missingterm((char*)0); yylval.ival = OP_CONST; /* FIXME. I think that this can be const if char *d is replaced by more localised variables. */ for (d = SvPV(PL_lex_stuff, len); len; len--, d++) { if (*d == '$' || *d == '@' || *d == '\\' || !UTF8_IS_INVARIANT((U8)*d)) { yylval.ival = OP_STRINGIFY; break; } } TERM(sublex_start()); case '`': s = scan_str(s,FALSE,FALSE); DEBUG_T( { S_printbuf(aTHX_ "### Saw backtick string before %s\n", s); } ); if (PL_expect == XOPERATOR) no_op("Backticks",s); if (!s) missingterm((char*)0); yylval.ival = OP_BACKTICK; set_csh(); TERM(sublex_start()); case '\\': s++; if (PL_lex_inwhat && isDIGIT(*s) && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX),"Can't use \\%c to mean $%c in expression", *s, *s); if (PL_expect == XOPERATOR) no_op("Backslash",s); OPERATOR(REFGEN); case 'v': if (isDIGIT(s[1]) && PL_expect != XOPERATOR) { char *start = s + 2; while (isDIGIT(*start) || *start == '_') start++; if (*start == '.' && isDIGIT(start[1])) { s = scan_num(s, &yylval); TERM(THING); } /* avoid v123abc() or $h{v1}, allow C */ else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF || PL_expect == XSTATE || PL_expect == XTERMORDORDOR)) { const char c = *start; GV *gv; *start = '\0'; gv = gv_fetchpv(s, 0, SVt_PVCV); *start = c; if (!gv) { s = scan_num(s, &yylval); TERM(THING); } } } goto keylookup; case 'x': if (isDIGIT(s[1]) && PL_expect == XOPERATOR) { s++; Mop(OP_REPEAT); } goto keylookup; case '_': case 'a': case 'A': case 'b': case 'B': case 'c': case 'C': case 'd': case 'D': case 'e': case 'E': case 'f': case 'F': case 'g': case 'G': case 'h': case 'H': case 'i': case 'I': case 'j': case 'J': case 'k': case 'K': case 'l': case 'L': case 'm': case 'M': case 'n': case 'N': case 'o': case 'O': case 'p': case 'P': case 'q': case 'Q': case 'r': case 'R': case 's': case 'S': case 't': case 'T': case 'u': case 'U': case 'V': case 'w': case 'W': case 'X': case 'y': case 'Y': case 'z': case 'Z': keylookup: { I32 tmp; I32 orig_keyword = 0; GV *gv = NULL; GV **gvp = NULL; PL_bufptr = s; s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len); /* Some keywords can be followed by any delimiter, including ':' */ tmp = ((len == 1 && strchr("msyq", PL_tokenbuf[0])) || (len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') || (PL_tokenbuf[0] == 'q' && strchr("qwxr", PL_tokenbuf[1]))))); /* x::* is just a word, unless x is "CORE" */ if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE")) goto just_a_word; d = s; while (d < PL_bufend && isSPACE(*d)) d++; /* no comments skipped here, or s### is misparsed */ /* Is this a label? */ if (!tmp && PL_expect == XSTATE && d < PL_bufend && *d == ':' && *(d + 1) != ':') { s = d + 1; yylval.pval = savepv(PL_tokenbuf); CLINE; TOKEN(LABEL); } /* Check for keywords */ tmp = keyword(PL_tokenbuf, len); /* Is this a word before a => operator? */ if (*d == '=' && d[1] == '>') { CLINE; yylval.opval = (OP*)newSVOP(OP_CONST, 0, S_newSV_maybe_utf8(aTHX_ PL_tokenbuf, len)); yylval.opval->op_private = OPpCONST_BARE; TERM(WORD); } if (tmp < 0) { /* second-class keyword? */ GV *ogv = NULL; /* override (winner) */ GV *hgv = NULL; /* hidden (loser) */ if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) { CV *cv; if ((gv = gv_fetchpvn_flags(PL_tokenbuf, len, 0, SVt_PVCV)) && (cv = GvCVu(gv))) { if (GvIMPORTED_CV(gv)) ogv = gv; else if (! CvMETHOD(cv)) hgv = gv; } if (!ogv && (gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) && (gv = *gvp) != (GV*)&PL_sv_undef && GvCVu(gv) && GvIMPORTED_CV(gv)) { ogv = gv; } } if (ogv) { orig_keyword = tmp; tmp = 0; /* overridden by import or by GLOBAL */ } else if (gv && !gvp && -tmp==KEY_lock /* XXX generalizable kludge */ && GvCVu(gv) && !hv_fetchs(GvHVn(PL_incgv), "Thread.pm", FALSE)) { tmp = 0; /* any sub overrides "weak" keyword */ } else { /* no override */ tmp = -tmp; if (tmp == KEY_dump && ckWARN(WARN_MISC)) { Perl_warner(aTHX_ packWARN(WARN_MISC), "dump() better written as CORE::dump()"); } gv = Nullgv; gvp = 0; if (hgv && tmp != KEY_x && tmp != KEY_CORE && ckWARN(WARN_AMBIGUOUS)) /* never ambiguous */ Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Ambiguous call resolved as CORE::%s(), %s", GvENAME(hgv), "qualify as such or use &"); } } reserved_word: switch (tmp) { default: /* not a keyword */ /* Trade off - by using this evil construction we can pull the variable gv into the block labelled keylookup. If not, then we have to give it function scope so that the goto from the earlier ':' case doesn't bypass the initialisation. */ if (0) { just_a_word_zero_gv: gv = NULL; gvp = NULL; orig_keyword = 0; } just_a_word: { SV *sv; int pkgname = 0; const char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]); CV *cv; /* Get the rest if it looks like a package qualifier */ if (*s == '\'' || (*s == ':' && s[1] == ':')) { STRLEN morelen; s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len, TRUE, &morelen); if (!morelen) Perl_croak(aTHX_ "Bad name after %s%s", PL_tokenbuf, *s == '\'' ? "'" : "::"); len += morelen; pkgname = 1; } if (PL_expect == XOPERATOR) { if (PL_bufptr == PL_linestart) { CopLINE_dec(PL_curcop); Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi); CopLINE_inc(PL_curcop); } else no_op("Bareword",s); } /* Look for a subroutine with this name in current package, unless name is "Foo::", in which case Foo is a bearword (and a package name). */ if (len > 2 && PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':') { if (ckWARN(WARN_BAREWORD) && ! gv_fetchpvn_flags(PL_tokenbuf, len, 0, SVt_PVHV)) Perl_warner(aTHX_ packWARN(WARN_BAREWORD), "Bareword \"%s\" refers to nonexistent package", PL_tokenbuf); len -= 2; PL_tokenbuf[len] = '\0'; gv = Nullgv; gvp = 0; } else { len = 0; if (!gv) { /* Mustn't actually add anything to a symbol table. But also don't want to "initialise" any placeholder constants that might already be there into full blown PVGVs with attached PVCV. */ gv = gv_fetchpvn_flags(PL_tokenbuf, len, GV_NOADD_NOINIT, SVt_PVCV); } } /* if we saw a global override before, get the right name */ if (gvp) { sv = newSVpvs("CORE::GLOBAL::"); sv_catpv(sv,PL_tokenbuf); } else { /* If len is 0, newSVpv does strlen(), which is correct. If len is non-zero, then it will be the true length, and so the scalar will be created correctly. */ sv = newSVpv(PL_tokenbuf,len); } /* Presume this is going to be a bareword of some sort. */ CLINE; yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv); yylval.opval->op_private = OPpCONST_BARE; /* UTF-8 package name? */ if (UTF && !IN_BYTES && is_utf8_string((U8*)SvPVX_const(sv), SvCUR(sv))) SvUTF8_on(sv); /* And if "Foo::", then that's what it certainly is. */ if (len) goto safe_bareword; /* Do the explicit type check so that we don't need to force the initialisation of the symbol table to have a real GV. Beware - gv may not really be a PVGV, cv may not really be a PVCV, (because of the space optimisations that gv_init understands) But they're true if for this symbol there is respectively a typeglob and a subroutine. */ cv = gv ? ((SvTYPE(gv) == SVt_PVGV) /* Real typeglob, so get the real subroutine: */ ? GvCVu(gv) /* A proxy for a subroutine in this package? */ : SvOK(gv) ? (CV *) gv : NULL) : NULL; /* See if it's the indirect object for a list operator. */ if (PL_oldoldbufptr && PL_oldoldbufptr < PL_bufptr && (PL_oldoldbufptr == PL_last_lop || PL_oldoldbufptr == PL_last_uni) && /* NO SKIPSPACE BEFORE HERE! */ (PL_expect == XREF || ((PL_opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF)) { bool immediate_paren = *s == '('; /* (Now we can afford to cross potential line boundary.) */ s = skipspace(s); /* Two barewords in a row may indicate method call. */ if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s, gv, cv))) return REPORT(tmp); /* If not a declared subroutine, it's an indirect object. */ /* (But it's an indir obj regardless for sort.) */ /* Also, if "_" follows a filetest operator, it's a bareword */ if ( ( !immediate_paren && (PL_last_lop_op == OP_SORT || ((!gv || !cv) && (PL_last_lop_op != OP_MAPSTART && PL_last_lop_op != OP_GREPSTART)))) || (PL_tokenbuf[0] == '_' && PL_tokenbuf[1] == '\0' && ((PL_opargs[PL_last_lop_op] & OA_CLASS_MASK) == OA_FILESTATOP)) ) { PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR; goto bareword; } } PL_expect = XOPERATOR; s = skipspace(s); /* Is this a word before a => operator? */ if (*s == '=' && s[1] == '>' && !pkgname) { CLINE; sv_setpv(((SVOP*)yylval.opval)->op_sv, PL_tokenbuf); if (UTF && !IN_BYTES && is_utf8_string((U8*)PL_tokenbuf, len)) SvUTF8_on(((SVOP*)yylval.opval)->op_sv); TERM(WORD); } /* If followed by a paren, it's certainly a subroutine. */ if (*s == '(') { CLINE; if (cv) { for (d = s + 1; SPACE_OR_TAB(*d); d++) ; if (*d == ')' && (sv = gv_const_sv(gv))) { s = d + 1; goto its_constant; } } PL_nextval[PL_nexttoke].opval = yylval.opval; PL_expect = XOPERATOR; force_next(WORD); yylval.ival = 0; TOKEN('&'); } /* If followed by var or block, call it a method (unless sub) */ if ((*s == '$' || *s == '{') && (!gv || !cv)) { PL_last_lop = PL_oldbufptr; PL_last_lop_op = OP_METHOD; PREBLOCK(METHOD); } /* If followed by a bareword, see if it looks like indir obj. */ if (!orig_keyword && (isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s, gv, cv))) return REPORT(tmp); /* Not a method, so call it a subroutine (if defined) */ if (cv) { if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS)) Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Ambiguous use of -%s resolved as -&%s()", PL_tokenbuf, PL_tokenbuf); /* Check for a constant sub */ if ((sv = gv_const_sv(gv))) { its_constant: SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv); ((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv); yylval.opval->op_private = 0; TOKEN(WORD); } /* Resolve to GV now. */ if (SvTYPE(gv) != SVt_PVGV) { gv = gv_fetchpvn_flags(PL_tokenbuf, len, 0, SVt_PVCV); assert (SvTYPE(gv) == SVt_PVGV); /* cv must have been some sort of placeholder, so now needs replacing with a real code reference. */ cv = GvCV(gv); } op_free(yylval.opval); yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv)); yylval.opval->op_private |= OPpENTERSUB_NOPAREN; PL_last_lop = PL_oldbufptr; PL_last_lop_op = OP_ENTERSUB; /* Is there a prototype? */ if (SvPOK(cv)) { STRLEN len; const char *proto = SvPV_const((SV*)cv, len); if (!len) TERM(FUNC0SUB); if (*proto == '$' && proto[1] == '\0') OPERATOR(UNIOPSUB); while (*proto == ';') proto++; if (*proto == '&' && *s == '{') { sv_setpv(PL_subname, PL_curstash ? "__ANON__" : "__ANON__::__ANON__"); PREBLOCK(LSTOPSUB); } } PL_nextval[PL_nexttoke].opval = yylval.opval; PL_expect = XTERM; force_next(WORD); TOKEN(NOAMP); } /* Call it a bare word */ if (PL_hints & HINT_STRICT_SUBS) yylval.opval->op_private |= OPpCONST_STRICT; else { bareword: if (lastchar != '-') { if (ckWARN(WARN_RESERVED)) { for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ; if (!*d && !gv_stashpv(PL_tokenbuf,FALSE)) Perl_warner(aTHX_ packWARN(WARN_RESERVED), PL_warn_reserved, PL_tokenbuf); } } } safe_bareword: if ((lastchar == '*' || lastchar == '%' || lastchar == '&') && ckWARN_d(WARN_AMBIGUOUS)) { Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Operator or semicolon missing before %c%s", lastchar, PL_tokenbuf); Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Ambiguous use of %c resolved as operator %c", lastchar, lastchar); } TOKEN(WORD); } case KEY___FILE__: yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(CopFILE(PL_curcop),0)); TERM(THING); case KEY___LINE__: yylval.opval = (OP*)newSVOP(OP_CONST, 0, Perl_newSVpvf(aTHX_ "%"IVdf, (IV)CopLINE(PL_curcop))); TERM(THING); case KEY___PACKAGE__: yylval.opval = (OP*)newSVOP(OP_CONST, 0, (PL_curstash ? newSVhek(HvNAME_HEK(PL_curstash)) : &PL_sv_undef)); TERM(THING); case KEY___DATA__: case KEY___END__: { GV *gv; if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) { const char *pname = "main"; if (PL_tokenbuf[2] == 'D') pname = HvNAME_get(PL_curstash ? PL_curstash : PL_defstash); gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), GV_ADD, SVt_PVIO); GvMULTI_on(gv); if (!GvIO(gv)) GvIOp(gv) = newIO(); IoIFP(GvIOp(gv)) = PL_rsfp; #if defined(HAS_FCNTL) && defined(F_SETFD) { const int fd = PerlIO_fileno(PL_rsfp); fcntl(fd,F_SETFD,fd >= 3); } #endif /* Mark this internal pseudo-handle as clean */ IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT; if (PL_preprocess) IoTYPE(GvIOp(gv)) = IoTYPE_PIPE; else if ((PerlIO*)PL_rsfp == PerlIO_stdin()) IoTYPE(GvIOp(gv)) = IoTYPE_STD; else IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY; #if defined(WIN32) && !defined(PERL_TEXTMODE_SCRIPTS) /* if the script was opened in binmode, we need to revert * it to text mode for compatibility; but only iff it has CRs * XXX this is a questionable hack at best. */ if (PL_bufend-PL_bufptr > 2 && PL_bufend[-1] == '\n' && PL_bufend[-2] == '\r') { Off_t loc = 0; if (IoTYPE(GvIOp(gv)) == IoTYPE_RDONLY) { loc = PerlIO_tell(PL_rsfp); (void)PerlIO_seek(PL_rsfp, 0L, 0); } #ifdef NETWARE if (PerlLIO_setmode(PL_rsfp, O_TEXT) != -1) { #else if (PerlLIO_setmode(PerlIO_fileno(PL_rsfp), O_TEXT) != -1) { #endif /* NETWARE */ #ifdef PERLIO_IS_STDIO /* really? */ # if defined(__BORLANDC__) /* XXX see note in do_binmode() */ ((FILE*)PL_rsfp)->flags &= ~_F_BIN; # endif #endif if (loc > 0) PerlIO_seek(PL_rsfp, loc, 0); } } #endif #ifdef PERLIO_LAYERS if (!IN_BYTES) { if (UTF) PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, ":utf8"); else if (PL_encoding) { SV *name; dSP; ENTER; SAVETMPS; PUSHMARK(sp); EXTEND(SP, 1); XPUSHs(PL_encoding); PUTBACK; call_method("name", G_SCALAR); SPAGAIN; name = POPs; PUTBACK; PerlIO_apply_layers(aTHX_ PL_rsfp, NULL, Perl_form(aTHX_ ":encoding(%"SVf")", name)); FREETMPS; LEAVE; } } #endif PL_rsfp = Nullfp; } goto fake_eof; } case KEY_AUTOLOAD: case KEY_DESTROY: case KEY_BEGIN: case KEY_CHECK: case KEY_INIT: case KEY_END: if (PL_expect == XSTATE) { s = PL_bufptr; goto really_sub; } goto just_a_word; case KEY_CORE: if (*s == ':' && s[1] == ':') { s += 2; d = s; s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len); if (!(tmp = keyword(PL_tokenbuf, len))) Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf); if (tmp < 0) tmp = -tmp; else if (tmp == KEY_require || tmp == KEY_do) /* that's a way to remember we saw "CORE::" */ orig_keyword = tmp; goto reserved_word; } goto just_a_word; case KEY_abs: UNI(OP_ABS); case KEY_alarm: UNI(OP_ALARM); case KEY_accept: LOP(OP_ACCEPT,XTERM); case KEY_and: OPERATOR(ANDOP); case KEY_atan2: LOP(OP_ATAN2,XTERM); case KEY_bind: LOP(OP_BIND,XTERM); case KEY_binmode: LOP(OP_BINMODE,XTERM); case KEY_bless: LOP(OP_BLESS,XTERM); case KEY_break: FUN0(OP_BREAK); case KEY_chop: UNI(OP_CHOP); case KEY_continue: /* When 'use switch' is in effect, continue has a dual life as a control operator. */ { if (!FEATURE_IS_ENABLED("switch")) PREBLOCK(CONTINUE); else { /* We have to disambiguate the two senses of "continue". If the next token is a '{' then treat it as the start of a continue block; otherwise treat it as a control operator. */ s = skipspace(s); if (*s == '{') PREBLOCK(CONTINUE); else FUN0(OP_CONTINUE); } } case KEY_chdir: (void)gv_fetchpvs("ENV", GV_ADD, SVt_PVHV); /* may use HOME */ UNI(OP_CHDIR); case KEY_close: UNI(OP_CLOSE); case KEY_closedir: UNI(OP_CLOSEDIR); case KEY_cmp: Eop(OP_SCMP); case KEY_caller: UNI(OP_CALLER); case KEY_crypt: #ifdef FCRYPT if (!PL_cryptseen) { PL_cryptseen = TRUE; init_des(); } #endif LOP(OP_CRYPT,XTERM); case KEY_chmod: LOP(OP_CHMOD,XTERM); case KEY_chown: LOP(OP_CHOWN,XTERM); case KEY_connect: LOP(OP_CONNECT,XTERM); case KEY_chr: UNI(OP_CHR); case KEY_cos: UNI(OP_COS); case KEY_chroot: UNI(OP_CHROOT); case KEY_default: PREBLOCK(DEFAULT); case KEY_do: s = skipspace(s); if (*s == '{') PRETERMBLOCK(DO); if (*s != '\'') s = force_word(s,WORD,TRUE,TRUE,FALSE); if (orig_keyword == KEY_do) { orig_keyword = 0; yylval.ival = 1; } else yylval.ival = 0; OPERATOR(DO); case KEY_die: PL_hints |= HINT_BLOCK_SCOPE; LOP(OP_DIE,XTERM); case KEY_defined: UNI(OP_DEFINED); case KEY_delete: UNI(OP_DELETE); case KEY_dbmopen: gv_fetchpvs("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV); LOP(OP_DBMOPEN,XTERM); case KEY_dbmclose: UNI(OP_DBMCLOSE); case KEY_dump: s = force_word(s,WORD,TRUE,FALSE,FALSE); LOOPX(OP_DUMP); case KEY_else: PREBLOCK(ELSE); case KEY_elsif: yylval.ival = CopLINE(PL_curcop); OPERATOR(ELSIF); case KEY_eq: Eop(OP_SEQ); case KEY_exists: UNI(OP_EXISTS); case KEY_exit: UNI(OP_EXIT); case KEY_eval: s = skipspace(s); PL_expect = (*s == '{') ? XTERMBLOCK : XTERM; UNIBRACK(OP_ENTEREVAL); case KEY_eof: UNI(OP_EOF); case KEY_err: OPERATOR(DOROP); case KEY_exp: UNI(OP_EXP); case KEY_each: UNI(OP_EACH); case KEY_exec: set_csh(); LOP(OP_EXEC,XREF); case KEY_endhostent: FUN0(OP_EHOSTENT); case KEY_endnetent: FUN0(OP_ENETENT); case KEY_endservent: FUN0(OP_ESERVENT); case KEY_endprotoent: FUN0(OP_EPROTOENT); case KEY_endpwent: FUN0(OP_EPWENT); case KEY_endgrent: FUN0(OP_EGRENT); case KEY_for: case KEY_foreach: yylval.ival = CopLINE(PL_curcop); s = skipspace(s); if (PL_expect == XSTATE && isIDFIRST_lazy_if(s,UTF)) { char *p = s; if ((PL_bufend - p) >= 3 && strnEQ(p, "my", 2) && isSPACE(*(p + 2))) p += 2; else if ((PL_bufend - p) >= 4 && strnEQ(p, "our", 3) && isSPACE(*(p + 3))) p += 3; p = skipspace(p); if (isIDFIRST_lazy_if(p,UTF)) { p = scan_ident(p, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE); p = skipspace(p); } if (*p != '$') Perl_croak(aTHX_ "Missing $ on loop variable"); } OPERATOR(FOR); case KEY_formline: LOP(OP_FORMLINE,XTERM); case KEY_fork: FUN0(OP_FORK); case KEY_fcntl: LOP(OP_FCNTL,XTERM); case KEY_fileno: UNI(OP_FILENO); case KEY_flock: LOP(OP_FLOCK,XTERM); case KEY_gt: Rop(OP_SGT); case KEY_ge: Rop(OP_SGE); case KEY_grep: LOP(OP_GREPSTART, XREF); case KEY_goto: s = force_word(s,WORD,TRUE,FALSE,FALSE); LOOPX(OP_GOTO); case KEY_gmtime: UNI(OP_GMTIME); case KEY_getc: UNIDOR(OP_GETC); case KEY_getppid: FUN0(OP_GETPPID); case KEY_getpgrp: UNI(OP_GETPGRP); case KEY_getpriority: LOP(OP_GETPRIORITY,XTERM); case KEY_getprotobyname: UNI(OP_GPBYNAME); case KEY_getprotobynumber: LOP(OP_GPBYNUMBER,XTERM); case KEY_getprotoent: FUN0(OP_GPROTOENT); case KEY_getpwent: FUN0(OP_GPWENT); case KEY_getpwnam: UNI(OP_GPWNAM); case KEY_getpwuid: UNI(OP_GPWUID); case KEY_getpeername: UNI(OP_GETPEERNAME); case KEY_gethostbyname: UNI(OP_GHBYNAME); case KEY_gethostbyaddr: LOP(OP_GHBYADDR,XTERM); case KEY_gethostent: FUN0(OP_GHOSTENT); case KEY_getnetbyname: UNI(OP_GNBYNAME); case KEY_getnetbyaddr: LOP(OP_GNBYADDR,XTERM); case KEY_getnetent: FUN0(OP_GNETENT); case KEY_getservbyname: LOP(OP_GSBYNAME,XTERM); case KEY_getservbyport: LOP(OP_GSBYPORT,XTERM); case KEY_getservent: FUN0(OP_GSERVENT); case KEY_getsockname: UNI(OP_GETSOCKNAME); case KEY_getsockopt: LOP(OP_GSOCKOPT,XTERM); case KEY_getgrent: FUN0(OP_GGRENT); case KEY_getgrnam: UNI(OP_GGRNAM); case KEY_getgrgid: UNI(OP_GGRGID); case KEY_getlogin: FUN0(OP_GETLOGIN); case KEY_given: yylval.ival = CopLINE(PL_curcop); OPERATOR(GIVEN); case KEY_glob: set_csh(); LOP(OP_GLOB,XTERM); case KEY_hex: UNI(OP_HEX); case KEY_if: yylval.ival = CopLINE(PL_curcop); OPERATOR(IF); case KEY_index: LOP(OP_INDEX,XTERM); case KEY_int: UNI(OP_INT); case KEY_ioctl: LOP(OP_IOCTL,XTERM); case KEY_join: LOP(OP_JOIN,XTERM); case KEY_keys: UNI(OP_KEYS); case KEY_kill: LOP(OP_KILL,XTERM); case KEY_last: s = force_word(s,WORD,TRUE,FALSE,FALSE); LOOPX(OP_LAST); case KEY_lc: UNI(OP_LC); case KEY_lcfirst: UNI(OP_LCFIRST); case KEY_local: yylval.ival = 0; OPERATOR(LOCAL); case KEY_length: UNI(OP_LENGTH); case KEY_lt: Rop(OP_SLT); case KEY_le: Rop(OP_SLE); case KEY_localtime: UNI(OP_LOCALTIME); case KEY_log: UNI(OP_LOG); case KEY_link: LOP(OP_LINK,XTERM); case KEY_listen: LOP(OP_LISTEN,XTERM); case KEY_lock: UNI(OP_LOCK); case KEY_lstat: UNI(OP_LSTAT); case KEY_m: s = scan_pat(s,OP_MATCH); TERM(sublex_start()); case KEY_map: LOP(OP_MAPSTART, XREF); case KEY_mkdir: LOP(OP_MKDIR,XTERM); case KEY_msgctl: LOP(OP_MSGCTL,XTERM); case KEY_msgget: LOP(OP_MSGGET,XTERM); case KEY_msgrcv: LOP(OP_MSGRCV,XTERM); case KEY_msgsnd: LOP(OP_MSGSND,XTERM); case KEY_our: case KEY_my: PL_in_my = tmp; s = skipspace(s); if (isIDFIRST_lazy_if(s,UTF)) { s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len); if (len == 3 && strnEQ(PL_tokenbuf, "sub", 3)) goto really_sub; PL_in_my_stash = find_in_my_stash(PL_tokenbuf, len); if (!PL_in_my_stash) { char tmpbuf[1024]; PL_bufptr = s; sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf); yyerror(tmpbuf); } } yylval.ival = 1; OPERATOR(MY); case KEY_next: s = force_word(s,WORD,TRUE,FALSE,FALSE); LOOPX(OP_NEXT); case KEY_ne: Eop(OP_SNE); case KEY_no: s = tokenize_use(0, s); OPERATOR(USE); case KEY_not: if (*s == '(' || (s = skipspace(s), *s == '(')) FUN1(OP_NOT); else OPERATOR(NOTOP); case KEY_open: s = skipspace(s); if (isIDFIRST_lazy_if(s,UTF)) { const char *t; for (d = s; isALNUM_lazy_if(d,UTF); d++) ; for (t=d; *t && isSPACE(*t); t++) ; if ( *t && strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE) /* [perl #16184] */ && !(t[0] == '=' && t[1] == '>') ) { int len = (int)(d-s); Perl_warner(aTHX_ packWARN(WARN_PRECEDENCE), "Precedence problem: open %.*s should be open(%.*s)", len, s, len, s); } } LOP(OP_OPEN,XTERM); case KEY_or: yylval.ival = OP_OR; OPERATOR(OROP); case KEY_ord: UNI(OP_ORD); case KEY_oct: UNI(OP_OCT); case KEY_opendir: LOP(OP_OPEN_DIR,XTERM); case KEY_print: checkcomma(s,PL_tokenbuf,"filehandle"); LOP(OP_PRINT,XREF); case KEY_printf: checkcomma(s,PL_tokenbuf,"filehandle"); LOP(OP_PRTF,XREF); case KEY_prototype: UNI(OP_PROTOTYPE); case KEY_push: LOP(OP_PUSH,XTERM); case KEY_pop: UNIDOR(OP_POP); case KEY_pos: UNIDOR(OP_POS); case KEY_pack: LOP(OP_PACK,XTERM); case KEY_package: s = force_word(s,WORD,FALSE,TRUE,FALSE); OPERATOR(PACKAGE); case KEY_pipe: LOP(OP_PIPE_OP,XTERM); case KEY_q: s = scan_str(s,FALSE,FALSE); if (!s) missingterm((char*)0); yylval.ival = OP_CONST; TERM(sublex_start()); case KEY_quotemeta: UNI(OP_QUOTEMETA); case KEY_qw: s = scan_str(s,FALSE,FALSE); if (!s) missingterm((char*)0); PL_expect = XOPERATOR; force_next(')'); if (SvCUR(PL_lex_stuff)) { OP *words = Nullop; int warned = 0; d = SvPV_force(PL_lex_stuff, len); while (len) { SV *sv; for (; isSPACE(*d) && len; --len, ++d) ; if (len) { const char *b = d; if (!warned && ckWARN(WARN_QW)) { for (; !isSPACE(*d) && len; --len, ++d) { if (*d == ',') { Perl_warner(aTHX_ packWARN(WARN_QW), "Possible attempt to separate words with commas"); ++warned; } else if (*d == '#') { Perl_warner(aTHX_ packWARN(WARN_QW), "Possible attempt to put comments in qw() list"); ++warned; } } } else { for (; !isSPACE(*d) && len; --len, ++d) ; } sv = newSVpvn(b, d-b); if (DO_UTF8(PL_lex_stuff)) SvUTF8_on(sv); words = append_elem(OP_LIST, words, newSVOP(OP_CONST, 0, tokeq(sv))); } } if (words) { PL_nextval[PL_nexttoke].opval = words; force_next(THING); } } if (PL_lex_stuff) { SvREFCNT_dec(PL_lex_stuff); PL_lex_stuff = Nullsv; } PL_expect = XTERM; TOKEN('('); case KEY_qq: s = scan_str(s,FALSE,FALSE); if (!s) missingterm((char*)0); yylval.ival = OP_STRINGIFY; if (SvIVX(PL_lex_stuff) == '\'') SvIV_set(PL_lex_stuff, 0); /* qq'$foo' should intepolate */ TERM(sublex_start()); case KEY_qr: s = scan_pat(s,OP_QR); TERM(sublex_start()); case KEY_qx: s = scan_str(s,FALSE,FALSE); if (!s) missingterm((char*)0); yylval.ival = OP_BACKTICK; set_csh(); TERM(sublex_start()); case KEY_return: OLDLOP(OP_RETURN); case KEY_require: s = skipspace(s); if (isDIGIT(*s)) { s = force_version(s, FALSE); } else if (*s != 'v' || !isDIGIT(s[1]) || (s = force_version(s, TRUE), *s == 'v')) { *PL_tokenbuf = '\0'; s = force_word(s,WORD,TRUE,TRUE,FALSE); if (isIDFIRST_lazy_if(PL_tokenbuf,UTF)) gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE); else if (*s == '<') yyerror("<> should be quotes"); } if (orig_keyword == KEY_require) { orig_keyword = 0; yylval.ival = 1; } else yylval.ival = 0; PL_expect = XTERM; PL_bufptr = s; PL_last_uni = PL_oldbufptr; PL_last_lop_op = OP_REQUIRE; s = skipspace(s); return REPORT( (int)REQUIRE ); case KEY_reset: UNI(OP_RESET); case KEY_redo: s = force_word(s,WORD,TRUE,FALSE,FALSE); LOOPX(OP_REDO); case KEY_rename: LOP(OP_RENAME,XTERM); case KEY_rand: UNI(OP_RAND); case KEY_rmdir: UNI(OP_RMDIR); case KEY_rindex: LOP(OP_RINDEX,XTERM); case KEY_read: LOP(OP_READ,XTERM); case KEY_readdir: UNI(OP_READDIR); case KEY_readline: set_csh(); UNIDOR(OP_READLINE); case KEY_readpipe: set_csh(); UNI(OP_BACKTICK); case KEY_rewinddir: UNI(OP_REWINDDIR); case KEY_recv: LOP(OP_RECV,XTERM); case KEY_reverse: LOP(OP_REVERSE,XTERM); case KEY_readlink: UNIDOR(OP_READLINK); case KEY_ref: UNI(OP_REF); case KEY_s: s = scan_subst(s); if (yylval.opval) TERM(sublex_start()); else TOKEN(1); /* force error */ case KEY_say: checkcomma(s,PL_tokenbuf,"filehandle"); LOP(OP_SAY,XREF); case KEY_chomp: UNI(OP_CHOMP); case KEY_scalar: UNI(OP_SCALAR); case KEY_select: LOP(OP_SELECT,XTERM); case KEY_seek: LOP(OP_SEEK,XTERM); case KEY_semctl: LOP(OP_SEMCTL,XTERM); case KEY_semget: LOP(OP_SEMGET,XTERM); case KEY_semop: LOP(OP_SEMOP,XTERM); case KEY_send: LOP(OP_SEND,XTERM); case KEY_setpgrp: LOP(OP_SETPGRP,XTERM); case KEY_setpriority: LOP(OP_SETPRIORITY,XTERM); case KEY_sethostent: UNI(OP_SHOSTENT); case KEY_setnetent: UNI(OP_SNETENT); case KEY_setservent: UNI(OP_SSERVENT); case KEY_setprotoent: UNI(OP_SPROTOENT); case KEY_setpwent: FUN0(OP_SPWENT); case KEY_setgrent: FUN0(OP_SGRENT); case KEY_seekdir: LOP(OP_SEEKDIR,XTERM); case KEY_setsockopt: LOP(OP_SSOCKOPT,XTERM); case KEY_shift: UNIDOR(OP_SHIFT); case KEY_shmctl: LOP(OP_SHMCTL,XTERM); case KEY_shmget: LOP(OP_SHMGET,XTERM); case KEY_shmread: LOP(OP_SHMREAD,XTERM); case KEY_shmwrite: LOP(OP_SHMWRITE,XTERM); case KEY_shutdown: LOP(OP_SHUTDOWN,XTERM); case KEY_sin: UNI(OP_SIN); case KEY_sleep: UNI(OP_SLEEP); case KEY_socket: LOP(OP_SOCKET,XTERM); case KEY_socketpair: LOP(OP_SOCKPAIR,XTERM); case KEY_sort: checkcomma(s,PL_tokenbuf,"subroutine name"); s = skipspace(s); if (*s == ';' || *s == ')') /* probably a close */ Perl_croak(aTHX_ "sort is now a reserved word"); PL_expect = XTERM; s = force_word(s,WORD,TRUE,TRUE,FALSE); LOP(OP_SORT,XREF); case KEY_split: LOP(OP_SPLIT,XTERM); case KEY_sprintf: LOP(OP_SPRINTF,XTERM); case KEY_splice: LOP(OP_SPLICE,XTERM); case KEY_sqrt: UNI(OP_SQRT); case KEY_srand: UNI(OP_SRAND); case KEY_stat: UNI(OP_STAT); case KEY_study: UNI(OP_STUDY); case KEY_substr: LOP(OP_SUBSTR,XTERM); case KEY_format: case KEY_sub: really_sub: { char tmpbuf[sizeof PL_tokenbuf]; SSize_t tboffset = 0; expectation attrful; bool have_name, have_proto, bad_proto; const int key = tmp; s = skipspace(s); if (isIDFIRST_lazy_if(s,UTF) || *s == '\'' || (*s == ':' && s[1] == ':')) { PL_expect = XBLOCK; attrful = XATTRBLOCK; /* remember buffer pos'n for later force_word */ tboffset = s - PL_oldbufptr; d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len); if (strchr(tmpbuf, ':')) sv_setpv(PL_subname, tmpbuf); else { sv_setsv(PL_subname,PL_curstname); sv_catpvs(PL_subname,"::"); sv_catpvn(PL_subname,tmpbuf,len); } s = skipspace(d); have_name = TRUE; } else { if (key == KEY_my) Perl_croak(aTHX_ "Missing name in \"my sub\""); PL_expect = XTERMBLOCK; attrful = XATTRTERM; sv_setpvn(PL_subname,"?",1); have_name = FALSE; } if (key == KEY_format) { if (*s == '=') PL_lex_formbrack = PL_lex_brackets + 1; if (have_name) (void) force_word(PL_oldbufptr + tboffset, WORD, FALSE, TRUE, TRUE); OPERATOR(FORMAT); } /* Look for a prototype */ if (*s == '(') { char *p; s = scan_str(s,FALSE,FALSE); if (!s) Perl_croak(aTHX_ "Prototype not terminated"); /* strip spaces and check for bad characters */ d = SvPVX(PL_lex_stuff); tmp = 0; bad_proto = FALSE; for (p = d; *p; ++p) { if (!isSPACE(*p)) { d[tmp++] = *p; if (!strchr("$@%*;[]&\\", *p)) bad_proto = TRUE; } } d[tmp] = '\0'; if (bad_proto && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Illegal character in prototype for %"SVf" : %s", PL_subname, d); SvCUR_set(PL_lex_stuff, tmp); have_proto = TRUE; s = skipspace(s); } else have_proto = FALSE; if (*s == ':' && s[1] != ':') PL_expect = attrful; else if (*s != '{' && key == KEY_sub) { if (!have_name) Perl_croak(aTHX_ "Illegal declaration of anonymous subroutine"); else if (*s != ';') Perl_croak(aTHX_ "Illegal declaration of subroutine %"SVf, PL_subname); } if (have_proto) { PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff); PL_lex_stuff = Nullsv; force_next(THING); } if (!have_name) { sv_setpv(PL_subname, PL_curstash ? "__ANON__" : "__ANON__::__ANON__"); TOKEN(ANONSUB); } (void) force_word(PL_oldbufptr + tboffset, WORD, FALSE, TRUE, TRUE); if (key == KEY_my) TOKEN(MYSUB); TOKEN(SUB); } case KEY_system: set_csh(); LOP(OP_SYSTEM,XREF); case KEY_symlink: LOP(OP_SYMLINK,XTERM); case KEY_syscall: LOP(OP_SYSCALL,XTERM); case KEY_sysopen: LOP(OP_SYSOPEN,XTERM); case KEY_sysseek: LOP(OP_SYSSEEK,XTERM); case KEY_sysread: LOP(OP_SYSREAD,XTERM); case KEY_syswrite: LOP(OP_SYSWRITE,XTERM); case KEY_tr: s = scan_trans(s); TERM(sublex_start()); case KEY_tell: UNI(OP_TELL); case KEY_telldir: UNI(OP_TELLDIR); case KEY_tie: LOP(OP_TIE,XTERM); case KEY_tied: UNI(OP_TIED); case KEY_time: FUN0(OP_TIME); case KEY_times: FUN0(OP_TMS); case KEY_truncate: LOP(OP_TRUNCATE,XTERM); case KEY_uc: UNI(OP_UC); case KEY_ucfirst: UNI(OP_UCFIRST); case KEY_untie: UNI(OP_UNTIE); case KEY_until: yylval.ival = CopLINE(PL_curcop); OPERATOR(UNTIL); case KEY_unless: yylval.ival = CopLINE(PL_curcop); OPERATOR(UNLESS); case KEY_unlink: LOP(OP_UNLINK,XTERM); case KEY_undef: UNIDOR(OP_UNDEF); case KEY_unpack: LOP(OP_UNPACK,XTERM); case KEY_utime: LOP(OP_UTIME,XTERM); case KEY_umask: UNIDOR(OP_UMASK); case KEY_unshift: LOP(OP_UNSHIFT,XTERM); case KEY_use: s = tokenize_use(1, s); OPERATOR(USE); case KEY_values: UNI(OP_VALUES); case KEY_vec: LOP(OP_VEC,XTERM); case KEY_when: yylval.ival = CopLINE(PL_curcop); OPERATOR(WHEN); case KEY_while: yylval.ival = CopLINE(PL_curcop); OPERATOR(WHILE); case KEY_warn: PL_hints |= HINT_BLOCK_SCOPE; LOP(OP_WARN,XTERM); case KEY_wait: FUN0(OP_WAIT); case KEY_waitpid: LOP(OP_WAITPID,XTERM); case KEY_wantarray: FUN0(OP_WANTARRAY); case KEY_write: #ifdef EBCDIC { char ctl_l[2]; ctl_l[0] = toCTRL('L'); ctl_l[1] = '\0'; gv_fetchpvn_flags(ctl_l, 1, GV_ADD, SVt_PV); } #else gv_fetchpvs("\f", GV_ADD, SVt_PV); /* Make sure $^L is defined */ #endif UNI(OP_ENTERWRITE); case KEY_x: if (PL_expect == XOPERATOR) Mop(OP_REPEAT); check_uni(); goto just_a_word; case KEY_xor: yylval.ival = OP_XOR; OPERATOR(OROP); case KEY_y: s = scan_trans(s); TERM(sublex_start()); } }} } #ifdef __SC__ #pragma segment Main #endif static int S_pending_ident(pTHX) { dVAR; register char *d; register I32 tmp = 0; /* pit holds the identifier we read and pending_ident is reset */ char pit = PL_pending_ident; PL_pending_ident = 0; DEBUG_T({ PerlIO_printf(Perl_debug_log, "### Pending identifier '%s'\n", PL_tokenbuf); }); /* if we're in a my(), we can't allow dynamics here. $foo'bar has already been turned into $foo::bar, so just check for colons. if it's a legal name, the OP is a PADANY. */ if (PL_in_my) { if (PL_in_my == KEY_our) { /* "our" is merely analogous to "my" */ if (strchr(PL_tokenbuf,':')) yyerror(Perl_form(aTHX_ "No package name allowed for " "variable %s in \"our\"", PL_tokenbuf)); tmp = allocmy(PL_tokenbuf); } else { if (strchr(PL_tokenbuf,':')) yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf)); yylval.opval = newOP(OP_PADANY, 0); yylval.opval->op_targ = allocmy(PL_tokenbuf); return PRIVATEREF; } } /* build the ops for accesses to a my() variable. Deny my($a) or my($b) in a sort block, *if* $a or $b is then used in a comparison. This catches most, but not all cases. For instance, it catches sort { my($a); $a <=> $b } but not sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; } (although why you'd do that is anyone's guess). */ if (!strchr(PL_tokenbuf,':')) { if (!PL_in_my) tmp = pad_findmy(PL_tokenbuf); if (tmp != NOT_IN_PAD) { /* might be an "our" variable" */ if (PAD_COMPNAME_FLAGS(tmp) & SVpad_OUR) { /* build ops for a bareword */ HV * const stash = PAD_COMPNAME_OURSTASH(tmp); HEK * const stashname = HvNAME_HEK(stash); SV * const sym = newSVhek(stashname); sv_catpvs(sym, "::"); sv_catpv(sym, PL_tokenbuf+1); yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym); yylval.opval->op_private = OPpCONST_ENTERED; gv_fetchsv(sym, (PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : GV_ADDMULTI ), ((PL_tokenbuf[0] == '$') ? SVt_PV : (PL_tokenbuf[0] == '@') ? SVt_PVAV : SVt_PVHV)); return WORD; } /* if it's a sort block and they're naming $a or $b */ if (PL_last_lop_op == OP_SORT && PL_tokenbuf[0] == '$' && (PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b') && !PL_tokenbuf[2]) { for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart; d < PL_bufend && *d != '\n'; d++) { if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) { Perl_croak(aTHX_ "Can't use \"my %s\" in sort comparison", PL_tokenbuf); } } } yylval.opval = newOP(OP_PADANY, 0); yylval.opval->op_targ = tmp; return PRIVATEREF; } } /* Whine if they've said @foo in a doublequoted string, and @foo isn't a variable we can find in the symbol table. */ if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) { GV *gv = gv_fetchpv(PL_tokenbuf+1, 0, SVt_PVAV); if ((!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv))) && ckWARN(WARN_AMBIGUOUS)) { /* Downgraded from fatal to warning 20000522 mjd */ Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Possible unintended interpolation of %s in string", PL_tokenbuf); } } /* build ops for a bareword */ yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0)); yylval.opval->op_private = OPpCONST_ENTERED; gv_fetchpv( PL_tokenbuf+1, /* If the identifier refers to a stash, don't autovivify it. * Change 24660 had the side effect of causing symbol table * hashes to always be defined, even if they were freshly * created and the only reference in the entire program was * the single statement with the defined %foo::bar:: test. * It appears that all code in the wild doing this actually * wants to know whether sub-packages have been loaded, so * by avoiding auto-vivifying symbol tables, we ensure that * defined %foo::bar:: continues to be false, and the existing * tests still give the expected answers, even though what * they're actually testing has now changed subtly. */ (*PL_tokenbuf == '%' && *(d = PL_tokenbuf + strlen(PL_tokenbuf) - 1) == ':' && d[-1] == ':' ? 0 : PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : GV_ADD), ((PL_tokenbuf[0] == '$') ? SVt_PV : (PL_tokenbuf[0] == '@') ? SVt_PVAV : SVt_PVHV)); return WORD; } /* * The following code was generated by perl_keyword.pl. */ I32 Perl_keyword (pTHX_ const char *name, I32 len) { dVAR; switch (len) { case 1: /* 5 tokens of length 1 */ switch (name[0]) { case 'm': { /* m */ return KEY_m; } case 'q': { /* q */ return KEY_q; } case 's': { /* s */ return KEY_s; } case 'x': { /* x */ return -KEY_x; } case 'y': { /* y */ return KEY_y; } default: goto unknown; } case 2: /* 18 tokens of length 2 */ switch (name[0]) { case 'd': if (name[1] == 'o') { /* do */ return KEY_do; } goto unknown; case 'e': if (name[1] == 'q') { /* eq */ return -KEY_eq; } goto unknown; case 'g': switch (name[1]) { case 'e': { /* ge */ return -KEY_ge; } case 't': { /* gt */ return -KEY_gt; } default: goto unknown; } case 'i': if (name[1] == 'f') { /* if */ return KEY_if; } goto unknown; case 'l': switch (name[1]) { case 'c': { /* lc */ return -KEY_lc; } case 'e': { /* le */ return -KEY_le; } case 't': { /* lt */ return -KEY_lt; } default: goto unknown; } case 'm': if (name[1] == 'y') { /* my */ return KEY_my; } goto unknown; case 'n': switch (name[1]) { case 'e': { /* ne */ return -KEY_ne; } case 'o': { /* no */ return KEY_no; } default: goto unknown; } case 'o': if (name[1] == 'r') { /* or */ return -KEY_or; } goto unknown; case 'q': switch (name[1]) { case 'q': { /* qq */ return KEY_qq; } case 'r': { /* qr */ return KEY_qr; } case 'w': { /* qw */ return KEY_qw; } case 'x': { /* qx */ return KEY_qx; } default: goto unknown; } case 't': if (name[1] == 'r') { /* tr */ return KEY_tr; } goto unknown; case 'u': if (name[1] == 'c') { /* uc */ return -KEY_uc; } goto unknown; default: goto unknown; } case 3: /* 29 tokens of length 3 */ switch (name[0]) { case 'E': if (name[1] == 'N' && name[2] == 'D') { /* END */ return KEY_END; } goto unknown; case 'a': switch (name[1]) { case 'b': if (name[2] == 's') { /* abs */ return -KEY_abs; } goto unknown; case 'n': if (name[2] == 'd') { /* and */ return -KEY_and; } goto unknown; default: goto unknown; } case 'c': switch (name[1]) { case 'h': if (name[2] == 'r') { /* chr */ return -KEY_chr; } goto unknown; case 'm': if (name[2] == 'p') { /* cmp */ return -KEY_cmp; } goto unknown; case 'o': if (name[2] == 's') { /* cos */ return -KEY_cos; } goto unknown; default: goto unknown; } case 'd': if (name[1] == 'i' && name[2] == 'e') { /* die */ return -KEY_die; } goto unknown; case 'e': switch (name[1]) { case 'o': if (name[2] == 'f') { /* eof */ return -KEY_eof; } goto unknown; case 'r': if (name[2] == 'r') { /* err */ return (FEATURE_IS_ENABLED("err") ? -KEY_err : 0); } goto unknown; case 'x': if (name[2] == 'p') { /* exp */ return -KEY_exp; } goto unknown; default: goto unknown; } case 'f': if (name[1] == 'o' && name[2] == 'r') { /* for */ return KEY_for; } goto unknown; case 'h': if (name[1] == 'e' && name[2] == 'x') { /* hex */ return -KEY_hex; } goto unknown; case 'i': if (name[1] == 'n' && name[2] == 't') { /* int */ return -KEY_int; } goto unknown; case 'l': if (name[1] == 'o' && name[2] == 'g') { /* log */ return -KEY_log; } goto unknown; case 'm': if (name[1] == 'a' && name[2] == 'p') { /* map */ return KEY_map; } goto unknown; case 'n': if (name[1] == 'o' && name[2] == 't') { /* not */ return -KEY_not; } goto unknown; case 'o': switch (name[1]) { case 'c': if (name[2] == 't') { /* oct */ return -KEY_oct; } goto unknown; case 'r': if (name[2] == 'd') { /* ord */ return -KEY_ord; } goto unknown; case 'u': if (name[2] == 'r') { /* our */ return KEY_our; } goto unknown; default: goto unknown; } case 'p': if (name[1] == 'o') { switch (name[2]) { case 'p': { /* pop */ return -KEY_pop; } case 's': { /* pos */ return KEY_pos; } default: goto unknown; } } goto unknown; case 'r': if (name[1] == 'e' && name[2] == 'f') { /* ref */ return -KEY_ref; } goto unknown; case 's': switch (name[1]) { case 'a': if (name[2] == 'y') { /* say */ return (FEATURE_IS_ENABLED("say") ? -KEY_say : 0); } goto unknown; case 'i': if (name[2] == 'n') { /* sin */ return -KEY_sin; } goto unknown; case 'u': if (name[2] == 'b') { /* sub */ return KEY_sub; } goto unknown; default: goto unknown; } case 't': if (name[1] == 'i' && name[2] == 'e') { /* tie */ return KEY_tie; } goto unknown; case 'u': if (name[1] == 's' && name[2] == 'e') { /* use */ return KEY_use; } goto unknown; case 'v': if (name[1] == 'e' && name[2] == 'c') { /* vec */ return -KEY_vec; } goto unknown; case 'x': if (name[1] == 'o' && name[2] == 'r') { /* xor */ return -KEY_xor; } goto unknown; default: goto unknown; } case 4: /* 41 tokens of length 4 */ switch (name[0]) { case 'C': if (name[1] == 'O' && name[2] == 'R' && name[3] == 'E') { /* CORE */ return -KEY_CORE; } goto unknown; case 'I': if (name[1] == 'N' && name[2] == 'I' && name[3] == 'T') { /* INIT */ return KEY_INIT; } goto unknown; case 'b': if (name[1] == 'i' && name[2] == 'n' && name[3] == 'd') { /* bind */ return -KEY_bind; } goto unknown; case 'c': if (name[1] == 'h' && name[2] == 'o' && name[3] == 'p') { /* chop */ return -KEY_chop; } goto unknown; case 'd': if (name[1] == 'u' && name[2] == 'm' && name[3] == 'p') { /* dump */ return -KEY_dump; } goto unknown; case 'e': switch (name[1]) { case 'a': if (name[2] == 'c' && name[3] == 'h') { /* each */ return -KEY_each; } goto unknown; case 'l': if (name[2] == 's' && name[3] == 'e') { /* else */ return KEY_else; } goto unknown; case 'v': if (name[2] == 'a' && name[3] == 'l') { /* eval */ return KEY_eval; } goto unknown; case 'x': switch (name[2]) { case 'e': if (name[3] == 'c') { /* exec */ return -KEY_exec; } goto unknown; case 'i': if (name[3] == 't') { /* exit */ return -KEY_exit; } goto unknown; default: goto unknown; } default: goto unknown; } case 'f': if (name[1] == 'o' && name[2] == 'r' && name[3] == 'k') { /* fork */ return -KEY_fork; } goto unknown; case 'g': switch (name[1]) { case 'e': if (name[2] == 't' && name[3] == 'c') { /* getc */ return -KEY_getc; } goto unknown; case 'l': if (name[2] == 'o' && name[3] == 'b') { /* glob */ return KEY_glob; } goto unknown; case 'o': if (name[2] == 't' && name[3] == 'o') { /* goto */ return KEY_goto; } goto unknown; case 'r': if (name[2] == 'e' && name[3] == 'p') { /* grep */ return KEY_grep; } goto unknown; default: goto unknown; } case 'j': if (name[1] == 'o' && name[2] == 'i' && name[3] == 'n') { /* join */ return -KEY_join; } goto unknown; case 'k': switch (name[1]) { case 'e': if (name[2] == 'y' && name[3] == 's') { /* keys */ return -KEY_keys; } goto unknown; case 'i': if (name[2] == 'l' && name[3] == 'l') { /* kill */ return -KEY_kill; } goto unknown; default: goto unknown; } case 'l': switch (name[1]) { case 'a': if (name[2] == 's' && name[3] == 't') { /* last */ return KEY_last; } goto unknown; case 'i': if (name[2] == 'n' && name[3] == 'k') { /* link */ return -KEY_link; } goto unknown; case 'o': if (name[2] == 'c' && name[3] == 'k') { /* lock */ return -KEY_lock; } goto unknown; default: goto unknown; } case 'n': if (name[1] == 'e' && name[2] == 'x' && name[3] == 't') { /* next */ return KEY_next; } goto unknown; case 'o': if (name[1] == 'p' && name[2] == 'e' && name[3] == 'n') { /* open */ return -KEY_open; } goto unknown; case 'p': switch (name[1]) { case 'a': if (name[2] == 'c' && name[3] == 'k') { /* pack */ return -KEY_pack; } goto unknown; case 'i': if (name[2] == 'p' && name[3] == 'e') { /* pipe */ return -KEY_pipe; } goto unknown; case 'u': if (name[2] == 's' && name[3] == 'h') { /* push */ return -KEY_push; } goto unknown; default: goto unknown; } case 'r': switch (name[1]) { case 'a': if (name[2] == 'n' && name[3] == 'd') { /* rand */ return -KEY_rand; } goto unknown; case 'e': switch (name[2]) { case 'a': if (name[3] == 'd') { /* read */ return -KEY_read; } goto unknown; case 'c': if (name[3] == 'v') { /* recv */ return -KEY_recv; } goto unknown; case 'd': if (name[3] == 'o') { /* redo */ return KEY_redo; } goto unknown; default: goto unknown; } default: goto unknown; } case 's': switch (name[1]) { case 'e': switch (name[2]) { case 'e': if (name[3] == 'k') { /* seek */ return -KEY_seek; } goto unknown; case 'n': if (name[3] == 'd') { /* send */ return -KEY_send; } goto unknown; default: goto unknown; } case 'o': if (name[2] == 'r' && name[3] == 't') { /* sort */ return KEY_sort; } goto unknown; case 'q': if (name[2] == 'r' && name[3] == 't') { /* sqrt */ return -KEY_sqrt; } goto unknown; case 't': if (name[2] == 'a' && name[3] == 't') { /* stat */ return -KEY_stat; } goto unknown; default: goto unknown; } case 't': switch (name[1]) { case 'e': if (name[2] == 'l' && name[3] == 'l') { /* tell */ return -KEY_tell; } goto unknown; case 'i': switch (name[2]) { case 'e': if (name[3] == 'd') { /* tied */ return KEY_tied; } goto unknown; case 'm': if (name[3] == 'e') { /* time */ return -KEY_time; } goto unknown; default: goto unknown; } default: goto unknown; } case 'w': switch (name[1]) { case 'a': switch (name[2]) { case 'i': if (name[3] == 't') { /* wait */ return -KEY_wait; } goto unknown; case 'r': if (name[3] == 'n') { /* warn */ return -KEY_warn; } goto unknown; default: goto unknown; } case 'h': if (name[2] == 'e' && name[3] == 'n') { /* when */ return (FEATURE_IS_ENABLED("switch") ? KEY_when : 0); } goto unknown; default: goto unknown; } default: goto unknown; } case 5: /* 38 tokens of length 5 */ switch (name[0]) { case 'B': if (name[1] == 'E' && name[2] == 'G' && name[3] == 'I' && name[4] == 'N') { /* BEGIN */ return KEY_BEGIN; } goto unknown; case 'C': if (name[1] == 'H' && name[2] == 'E' && name[3] == 'C' && name[4] == 'K') { /* CHECK */ return KEY_CHECK; } goto unknown; case 'a': switch (name[1]) { case 'l': if (name[2] == 'a' && name[3] == 'r' && name[4] == 'm') { /* alarm */ return -KEY_alarm; } goto unknown; case 't': if (name[2] == 'a' && name[3] == 'n' && name[4] == '2') { /* atan2 */ return -KEY_atan2; } goto unknown; default: goto unknown; } case 'b': switch (name[1]) { case 'l': if (name[2] == 'e' && name[3] == 's' && name[4] == 's') { /* bless */ return -KEY_bless; } goto unknown; case 'r': if (name[2] == 'e' && name[3] == 'a' && name[4] == 'k') { /* break */ return (FEATURE_IS_ENABLED("switch") ? -KEY_break : 0); } goto unknown; default: goto unknown; } case 'c': switch (name[1]) { case 'h': switch (name[2]) { case 'd': if (name[3] == 'i' && name[4] == 'r') { /* chdir */ return -KEY_chdir; } goto unknown; case 'm': if (name[3] == 'o' && name[4] == 'd') { /* chmod */ return -KEY_chmod; } goto unknown; case 'o': switch (name[3]) { case 'm': if (name[4] == 'p') { /* chomp */ return -KEY_chomp; } goto unknown; case 'w': if (name[4] == 'n') { /* chown */ return -KEY_chown; } goto unknown; default: goto unknown; } default: goto unknown; } case 'l': if (name[2] == 'o' && name[3] == 's' && name[4] == 'e') { /* close */ return -KEY_close; } goto unknown; case 'r': if (name[2] == 'y' && name[3] == 'p' && name[4] == 't') { /* crypt */ return -KEY_crypt; } goto unknown; default: goto unknown; } case 'e': if (name[1] == 'l' && name[2] == 's' && name[3] == 'i' && name[4] == 'f') { /* elsif */ return KEY_elsif; } goto unknown; case 'f': switch (name[1]) { case 'c': if (name[2] == 'n' && name[3] == 't' && name[4] == 'l') { /* fcntl */ return -KEY_fcntl; } goto unknown; case 'l': if (name[2] == 'o' && name[3] == 'c' && name[4] == 'k') { /* flock */ return -KEY_flock; } goto unknown; default: goto unknown; } case 'g': if (name[1] == 'i' && name[2] == 'v' && name[3] == 'e' && name[4] == 'n') { /* given */ return (FEATURE_IS_ENABLED("switch") ? KEY_given : 0); } goto unknown; case 'i': switch (name[1]) { case 'n': if (name[2] == 'd' && name[3] == 'e' && name[4] == 'x') { /* index */ return -KEY_index; } goto unknown; case 'o': if (name[2] == 'c' && name[3] == 't' && name[4] == 'l') { /* ioctl */ return -KEY_ioctl; } goto unknown; default: goto unknown; } case 'l': switch (name[1]) { case 'o': if (name[2] == 'c' && name[3] == 'a' && name[4] == 'l') { /* local */ return KEY_local; } goto unknown; case 's': if (name[2] == 't' && name[3] == 'a' && name[4] == 't') { /* lstat */ return -KEY_lstat; } goto unknown; default: goto unknown; } case 'm': if (name[1] == 'k' && name[2] == 'd' && name[3] == 'i' && name[4] == 'r') { /* mkdir */ return -KEY_mkdir; } goto unknown; case 'p': if (name[1] == 'r' && name[2] == 'i' && name[3] == 'n' && name[4] == 't') { /* print */ return KEY_print; } goto unknown; case 'r': switch (name[1]) { case 'e': if (name[2] == 's' && name[3] == 'e' && name[4] == 't') { /* reset */ return -KEY_reset; } goto unknown; case 'm': if (name[2] == 'd' && name[3] == 'i' && name[4] == 'r') { /* rmdir */ return -KEY_rmdir; } goto unknown; default: goto unknown; } case 's': switch (name[1]) { case 'e': if (name[2] == 'm' && name[3] == 'o' && name[4] == 'p') { /* semop */ return -KEY_semop; } goto unknown; case 'h': if (name[2] == 'i' && name[3] == 'f' && name[4] == 't') { /* shift */ return -KEY_shift; } goto unknown; case 'l': if (name[2] == 'e' && name[3] == 'e' && name[4] == 'p') { /* sleep */ return -KEY_sleep; } goto unknown; case 'p': if (name[2] == 'l' && name[3] == 'i' && name[4] == 't') { /* split */ return KEY_split; } goto unknown; case 'r': if (name[2] == 'a' && name[3] == 'n' && name[4] == 'd') { /* srand */ return -KEY_srand; } goto unknown; case 't': if (name[2] == 'u' && name[3] == 'd' && name[4] == 'y') { /* study */ return KEY_study; } goto unknown; default: goto unknown; } case 't': if (name[1] == 'i' && name[2] == 'm' && name[3] == 'e' && name[4] == 's') { /* times */ return -KEY_times; } goto unknown; case 'u': switch (name[1]) { case 'm': if (name[2] == 'a' && name[3] == 's' && name[4] == 'k') { /* umask */ return -KEY_umask; } goto unknown; case 'n': switch (name[2]) { case 'd': if (name[3] == 'e' && name[4] == 'f') { /* undef */ return KEY_undef; } goto unknown; case 't': if (name[3] == 'i') { switch (name[4]) { case 'e': { /* untie */ return KEY_untie; } case 'l': { /* until */ return KEY_until; } default: goto unknown; } } goto unknown; default: goto unknown; } case 't': if (name[2] == 'i' && name[3] == 'm' && name[4] == 'e') { /* utime */ return -KEY_utime; } goto unknown; default: goto unknown; } case 'w': switch (name[1]) { case 'h': if (name[2] == 'i' && name[3] == 'l' && name[4] == 'e') { /* while */ return KEY_while; } goto unknown; case 'r': if (name[2] == 'i' && name[3] == 't' && name[4] == 'e') { /* write */ return -KEY_write; } goto unknown; default: goto unknown; } default: goto unknown; } case 6: /* 33 tokens of length 6 */ switch (name[0]) { case 'a': if (name[1] == 'c' && name[2] == 'c' && name[3] == 'e' && name[4] == 'p' && name[5] == 't') { /* accept */ return -KEY_accept; } goto unknown; case 'c': switch (name[1]) { case 'a': if (name[2] == 'l' && name[3] == 'l' && name[4] == 'e' && name[5] == 'r') { /* caller */ return -KEY_caller; } goto unknown; case 'h': if (name[2] == 'r' && name[3] == 'o' && name[4] == 'o' && name[5] == 't') { /* chroot */ return -KEY_chroot; } goto unknown; default: goto unknown; } case 'd': if (name[1] == 'e' && name[2] == 'l' && name[3] == 'e' && name[4] == 't' && name[5] == 'e') { /* delete */ return KEY_delete; } goto unknown; case 'e': switch (name[1]) { case 'l': if (name[2] == 's' && name[3] == 'e' && name[4] == 'i' && name[5] == 'f') { /* elseif */ if(ckWARN_d(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "elseif should be elsif"); } goto unknown; case 'x': if (name[2] == 'i' && name[3] == 's' && name[4] == 't' && name[5] == 's') { /* exists */ return KEY_exists; } goto unknown; default: goto unknown; } case 'f': switch (name[1]) { case 'i': if (name[2] == 'l' && name[3] == 'e' && name[4] == 'n' && name[5] == 'o') { /* fileno */ return -KEY_fileno; } goto unknown; case 'o': if (name[2] == 'r' && name[3] == 'm' && name[4] == 'a' && name[5] == 't') { /* format */ return KEY_format; } goto unknown; default: goto unknown; } case 'g': if (name[1] == 'm' && name[2] == 't' && name[3] == 'i' && name[4] == 'm' && name[5] == 'e') { /* gmtime */ return -KEY_gmtime; } goto unknown; case 'l': switch (name[1]) { case 'e': if (name[2] == 'n' && name[3] == 'g' && name[4] == 't' && name[5] == 'h') { /* length */ return -KEY_length; } goto unknown; case 'i': if (name[2] == 's' && name[3] == 't' && name[4] == 'e' && name[5] == 'n') { /* listen */ return -KEY_listen; } goto unknown; default: goto unknown; } case 'm': if (name[1] == 's' && name[2] == 'g') { switch (name[3]) { case 'c': if (name[4] == 't' && name[5] == 'l') { /* msgctl */ return -KEY_msgctl; } goto unknown; case 'g': if (name[4] == 'e' && name[5] == 't') { /* msgget */ return -KEY_msgget; } goto unknown; case 'r': if (name[4] == 'c' && name[5] == 'v') { /* msgrcv */ return -KEY_msgrcv; } goto unknown; case 's': if (name[4] == 'n' && name[5] == 'd') { /* msgsnd */ return -KEY_msgsnd; } goto unknown; default: goto unknown; } } goto unknown; case 'p': if (name[1] == 'r' && name[2] == 'i' && name[3] == 'n' && name[4] == 't' && name[5] == 'f') { /* printf */ return KEY_printf; } goto unknown; case 'r': switch (name[1]) { case 'e': switch (name[2]) { case 'n': if (name[3] == 'a' && name[4] == 'm' && name[5] == 'e') { /* rename */ return -KEY_rename; } goto unknown; case 't': if (name[3] == 'u' && name[4] == 'r' && name[5] == 'n') { /* return */ return KEY_return; } goto unknown; default: goto unknown; } case 'i': if (name[2] == 'n' && name[3] == 'd' && name[4] == 'e' && name[5] == 'x') { /* rindex */ return -KEY_rindex; } goto unknown; default: goto unknown; } case 's': switch (name[1]) { case 'c': if (name[2] == 'a' && name[3] == 'l' && name[4] == 'a' && name[5] == 'r') { /* scalar */ return KEY_scalar; } goto unknown; case 'e': switch (name[2]) { case 'l': if (name[3] == 'e' && name[4] == 'c' && name[5] == 't') { /* select */ return -KEY_select; } goto unknown; case 'm': switch (name[3]) { case 'c': if (name[4] == 't' && name[5] == 'l') { /* semctl */ return -KEY_semctl; } goto unknown; case 'g': if (name[4] == 'e' && name[5] == 't') { /* semget */ return -KEY_semget; } goto unknown; default: goto unknown; } default: goto unknown; } case 'h': if (name[2] == 'm') { switch (name[3]) { case 'c': if (name[4] == 't' && name[5] == 'l') { /* shmctl */ return -KEY_shmctl; } goto unknown; case 'g': if (name[4] == 'e' && name[5] == 't') { /* shmget */ return -KEY_shmget; } goto unknown; default: goto unknown; } } goto unknown; case 'o': if (name[2] == 'c' && name[3] == 'k' && name[4] == 'e' && name[5] == 't') { /* socket */ return -KEY_socket; } goto unknown; case 'p': if (name[2] == 'l' && name[3] == 'i' && name[4] == 'c' && name[5] == 'e') { /* splice */ return -KEY_splice; } goto unknown; case 'u': if (name[2] == 'b' && name[3] == 's' && name[4] == 't' && name[5] == 'r') { /* substr */ return -KEY_substr; } goto unknown; case 'y': if (name[2] == 's' && name[3] == 't' && name[4] == 'e' && name[5] == 'm') { /* system */ return -KEY_system; } goto unknown; default: goto unknown; } case 'u': if (name[1] == 'n') { switch (name[2]) { case 'l': switch (name[3]) { case 'e': if (name[4] == 's' && name[5] == 's') { /* unless */ return KEY_unless; } goto unknown; case 'i': if (name[4] == 'n' && name[5] == 'k') { /* unlink */ return -KEY_unlink; } goto unknown; default: goto unknown; } case 'p': if (name[3] == 'a' && name[4] == 'c' && name[5] == 'k') { /* unpack */ return -KEY_unpack; } goto unknown; default: goto unknown; } } goto unknown; case 'v': if (name[1] == 'a' && name[2] == 'l' && name[3] == 'u' && name[4] == 'e' && name[5] == 's') { /* values */ return -KEY_values; } goto unknown; default: goto unknown; } case 7: /* 29 tokens of length 7 */ switch (name[0]) { case 'D': if (name[1] == 'E' && name[2] == 'S' && name[3] == 'T' && name[4] == 'R' && name[5] == 'O' && name[6] == 'Y') { /* DESTROY */ return KEY_DESTROY; } goto unknown; case '_': if (name[1] == '_' && name[2] == 'E' && name[3] == 'N' && name[4] == 'D' && name[5] == '_' && name[6] == '_') { /* __END__ */ return KEY___END__; } goto unknown; case 'b': if (name[1] == 'i' && name[2] == 'n' && name[3] == 'm' && name[4] == 'o' && name[5] == 'd' && name[6] == 'e') { /* binmode */ return -KEY_binmode; } goto unknown; case 'c': if (name[1] == 'o' && name[2] == 'n' && name[3] == 'n' && name[4] == 'e' && name[5] == 'c' && name[6] == 't') { /* connect */ return -KEY_connect; } goto unknown; case 'd': switch (name[1]) { case 'b': if (name[2] == 'm' && name[3] == 'o' && name[4] == 'p' && name[5] == 'e' && name[6] == 'n') { /* dbmopen */ return -KEY_dbmopen; } goto unknown; case 'e': if (name[2] == 'f') { switch (name[3]) { case 'a': if (name[4] == 'u' && name[5] == 'l' && name[6] == 't') { /* default */ return (FEATURE_IS_ENABLED("switch") ? KEY_default : 0); } goto unknown; case 'i': if (name[4] == 'n' && name[5] == 'e' && name[6] == 'd') { /* defined */ return KEY_defined; } goto unknown; default: goto unknown; } } goto unknown; default: goto unknown; } case 'f': if (name[1] == 'o' && name[2] == 'r' && name[3] == 'e' && name[4] == 'a' && name[5] == 'c' && name[6] == 'h') { /* foreach */ return KEY_foreach; } goto unknown; case 'g': if (name[1] == 'e' && name[2] == 't' && name[3] == 'p') { switch (name[4]) { case 'g': if (name[5] == 'r' && name[6] == 'p') { /* getpgrp */ return -KEY_getpgrp; } goto unknown; case 'p': if (name[5] == 'i' && name[6] == 'd') { /* getppid */ return -KEY_getppid; } goto unknown; default: goto unknown; } } goto unknown; case 'l': if (name[1] == 'c' && name[2] == 'f' && name[3] == 'i' && name[4] == 'r' && name[5] == 's' && name[6] == 't') { /* lcfirst */ return -KEY_lcfirst; } goto unknown; case 'o': if (name[1] == 'p' && name[2] == 'e' && name[3] == 'n' && name[4] == 'd' && name[5] == 'i' && name[6] == 'r') { /* opendir */ return -KEY_opendir; } goto unknown; case 'p': if (name[1] == 'a' && name[2] == 'c' && name[3] == 'k' && name[4] == 'a' && name[5] == 'g' && name[6] == 'e') { /* package */ return KEY_package; } goto unknown; case 'r': if (name[1] == 'e') { switch (name[2]) { case 'a': if (name[3] == 'd' && name[4] == 'd' && name[5] == 'i' && name[6] == 'r') { /* readdir */ return -KEY_readdir; } goto unknown; case 'q': if (name[3] == 'u' && name[4] == 'i' && name[5] == 'r' && name[6] == 'e') { /* require */ return KEY_require; } goto unknown; case 'v': if (name[3] == 'e' && name[4] == 'r' && name[5] == 's' && name[6] == 'e') { /* reverse */ return -KEY_reverse; } goto unknown; default: goto unknown; } } goto unknown; case 's': switch (name[1]) { case 'e': switch (name[2]) { case 'e': if (name[3] == 'k' && name[4] == 'd' && name[5] == 'i' && name[6] == 'r') { /* seekdir */ return -KEY_seekdir; } goto unknown; case 't': if (name[3] == 'p' && name[4] == 'g' && name[5] == 'r' && name[6] == 'p') { /* setpgrp */ return -KEY_setpgrp; } goto unknown; default: goto unknown; } case 'h': if (name[2] == 'm' && name[3] == 'r' && name[4] == 'e' && name[5] == 'a' && name[6] == 'd') { /* shmread */ return -KEY_shmread; } goto unknown; case 'p': if (name[2] == 'r' && name[3] == 'i' && name[4] == 'n' && name[5] == 't' && name[6] == 'f') { /* sprintf */ return -KEY_sprintf; } goto unknown; case 'y': switch (name[2]) { case 'm': if (name[3] == 'l' && name[4] == 'i' && name[5] == 'n' && name[6] == 'k') { /* symlink */ return -KEY_symlink; } goto unknown; case 's': switch (name[3]) { case 'c': if (name[4] == 'a' && name[5] == 'l' && name[6] == 'l') { /* syscall */ return -KEY_syscall; } goto unknown; case 'o': if (name[4] == 'p' && name[5] == 'e' && name[6] == 'n') { /* sysopen */ return -KEY_sysopen; } goto unknown; case 'r': if (name[4] == 'e' && name[5] == 'a' && name[6] == 'd') { /* sysread */ return -KEY_sysread; } goto unknown; case 's': if (name[4] == 'e' && name[5] == 'e' && name[6] == 'k') { /* sysseek */ return -KEY_sysseek; } goto unknown; default: goto unknown; } default: goto unknown; } default: goto unknown; } case 't': if (name[1] == 'e' && name[2] == 'l' && name[3] == 'l' && name[4] == 'd' && name[5] == 'i' && name[6] == 'r') { /* telldir */ return -KEY_telldir; } goto unknown; case 'u': switch (name[1]) { case 'c': if (name[2] == 'f' && name[3] == 'i' && name[4] == 'r' && name[5] == 's' && name[6] == 't') { /* ucfirst */ return -KEY_ucfirst; } goto unknown; case 'n': if (name[2] == 's' && name[3] == 'h' && name[4] == 'i' && name[5] == 'f' && name[6] == 't') { /* unshift */ return -KEY_unshift; } goto unknown; default: goto unknown; } case 'w': if (name[1] == 'a' && name[2] == 'i' && name[3] == 't' && name[4] == 'p' && name[5] == 'i' && name[6] == 'd') { /* waitpid */ return -KEY_waitpid; } goto unknown; default: goto unknown; } case 8: /* 26 tokens of length 8 */ switch (name[0]) { case 'A': if (name[1] == 'U' && name[2] == 'T' && name[3] == 'O' && name[4] == 'L' && name[5] == 'O' && name[6] == 'A' && name[7] == 'D') { /* AUTOLOAD */ return KEY_AUTOLOAD; } goto unknown; case '_': if (name[1] == '_') { switch (name[2]) { case 'D': if (name[3] == 'A' && name[4] == 'T' && name[5] == 'A' && name[6] == '_' && name[7] == '_') { /* __DATA__ */ return KEY___DATA__; } goto unknown; case 'F': if (name[3] == 'I' && name[4] == 'L' && name[5] == 'E' && name[6] == '_' && name[7] == '_') { /* __FILE__ */ return -KEY___FILE__; } goto unknown; case 'L': if (name[3] == 'I' && name[4] == 'N' && name[5] == 'E' && name[6] == '_' && name[7] == '_') { /* __LINE__ */ return -KEY___LINE__; } goto unknown; default: goto unknown; } } goto unknown; case 'c': switch (name[1]) { case 'l': if (name[2] == 'o' && name[3] == 's' && name[4] == 'e' && name[5] == 'd' && name[6] == 'i' && name[7] == 'r') { /* closedir */ return -KEY_closedir; } goto unknown; case 'o': if (name[2] == 'n' && name[3] == 't' && name[4] == 'i' && name[5] == 'n' && name[6] == 'u' && name[7] == 'e') { /* continue */ return -KEY_continue; } goto unknown; default: goto unknown; } case 'd': if (name[1] == 'b' && name[2] == 'm' && name[3] == 'c' && name[4] == 'l' && name[5] == 'o' && name[6] == 's' && name[7] == 'e') { /* dbmclose */ return -KEY_dbmclose; } goto unknown; case 'e': if (name[1] == 'n' && name[2] == 'd') { switch (name[3]) { case 'g': if (name[4] == 'r' && name[5] == 'e' && name[6] == 'n' && name[7] == 't') { /* endgrent */ return -KEY_endgrent; } goto unknown; case 'p': if (name[4] == 'w' && name[5] == 'e' && name[6] == 'n' && name[7] == 't') { /* endpwent */ return -KEY_endpwent; } goto unknown; default: goto unknown; } } goto unknown; case 'f': if (name[1] == 'o' && name[2] == 'r' && name[3] == 'm' && name[4] == 'l' && name[5] == 'i' && name[6] == 'n' && name[7] == 'e') { /* formline */ return -KEY_formline; } goto unknown; case 'g': if (name[1] == 'e' && name[2] == 't') { switch (name[3]) { case 'g': if (name[4] == 'r') { switch (name[5]) { case 'e': if (name[6] == 'n' && name[7] == 't') { /* getgrent */ return -KEY_getgrent; } goto unknown; case 'g': if (name[6] == 'i' && name[7] == 'd') { /* getgrgid */ return -KEY_getgrgid; } goto unknown; case 'n': if (name[6] == 'a' && name[7] == 'm') { /* getgrnam */ return -KEY_getgrnam; } goto unknown; default: goto unknown; } } goto unknown; case 'l': if (name[4] == 'o' && name[5] == 'g' && name[6] == 'i' && name[7] == 'n') { /* getlogin */ return -KEY_getlogin; } goto unknown; case 'p': if (name[4] == 'w') { switch (name[5]) { case 'e': if (name[6] == 'n' && name[7] == 't') { /* getpwent */ return -KEY_getpwent; } goto unknown; case 'n': if (name[6] == 'a' && name[7] == 'm') { /* getpwnam */ return -KEY_getpwnam; } goto unknown; case 'u': if (name[6] == 'i' && name[7] == 'd') { /* getpwuid */ return -KEY_getpwuid; } goto unknown; default: goto unknown; } } goto unknown; default: goto unknown; } } goto unknown; case 'r': if (name[1] == 'e' && name[2] == 'a' && name[3] == 'd') { switch (name[4]) { case 'l': if (name[5] == 'i' && name[6] == 'n') { switch (name[7]) { case 'e': { /* readline */ return -KEY_readline; } case 'k': { /* readlink */ return -KEY_readlink; } default: goto unknown; } } goto unknown; case 'p': if (name[5] == 'i' && name[6] == 'p' && name[7] == 'e') { /* readpipe */ return -KEY_readpipe; } goto unknown; default: goto unknown; } } goto unknown; case 's': switch (name[1]) { case 'e': if (name[2] == 't') { switch (name[3]) { case 'g': if (name[4] == 'r' && name[5] == 'e' && name[6] == 'n' && name[7] == 't') { /* setgrent */ return -KEY_setgrent; } goto unknown; case 'p': if (name[4] == 'w' && name[5] == 'e' && name[6] == 'n' && name[7] == 't') { /* setpwent */ return -KEY_setpwent; } goto unknown; default: goto unknown; } } goto unknown; case 'h': switch (name[2]) { case 'm': if (name[3] == 'w' && name[4] == 'r' && name[5] == 'i' && name[6] == 't' && name[7] == 'e') { /* shmwrite */ return -KEY_shmwrite; } goto unknown; case 'u': if (name[3] == 't' && name[4] == 'd' && name[5] == 'o' && name[6] == 'w' && name[7] == 'n') { /* shutdown */ return -KEY_shutdown; } goto unknown; default: goto unknown; } case 'y': if (name[2] == 's' && name[3] == 'w' && name[4] == 'r' && name[5] == 'i' && name[6] == 't' && name[7] == 'e') { /* syswrite */ return -KEY_syswrite; } goto unknown; default: goto unknown; } case 't': if (name[1] == 'r' && name[2] == 'u' && name[3] == 'n' && name[4] == 'c' && name[5] == 'a' && name[6] == 't' && name[7] == 'e') { /* truncate */ return -KEY_truncate; } goto unknown; default: goto unknown; } case 9: /* 8 tokens of length 9 */ switch (name[0]) { case 'e': if (name[1] == 'n' && name[2] == 'd' && name[3] == 'n' && name[4] == 'e' && name[5] == 't' && name[6] == 'e' && name[7] == 'n' && name[8] == 't') { /* endnetent */ return -KEY_endnetent; } goto unknown; case 'g': if (name[1] == 'e' && name[2] == 't' && name[3] == 'n' && name[4] == 'e' && name[5] == 't' && name[6] == 'e' && name[7] == 'n' && name[8] == 't') { /* getnetent */ return -KEY_getnetent; } goto unknown; case 'l': if (name[1] == 'o' && name[2] == 'c' && name[3] == 'a' && name[4] == 'l' && name[5] == 't' && name[6] == 'i' && name[7] == 'm' && name[8] == 'e') { /* localtime */ return -KEY_localtime; } goto unknown; case 'p': if (name[1] == 'r' && name[2] == 'o' && name[3] == 't' && name[4] == 'o' && name[5] == 't' && name[6] == 'y' && name[7] == 'p' && name[8] == 'e') { /* prototype */ return KEY_prototype; } goto unknown; case 'q': if (name[1] == 'u' && name[2] == 'o' && name[3] == 't' && name[4] == 'e' && name[5] == 'm' && name[6] == 'e' && name[7] == 't' && name[8] == 'a') { /* quotemeta */ return -KEY_quotemeta; } goto unknown; case 'r': if (name[1] == 'e' && name[2] == 'w' && name[3] == 'i' && name[4] == 'n' && name[5] == 'd' && name[6] == 'd' && name[7] == 'i' && name[8] == 'r') { /* rewinddir */ return -KEY_rewinddir; } goto unknown; case 's': if (name[1] == 'e' && name[2] == 't' && name[3] == 'n' && name[4] == 'e' && name[5] == 't' && name[6] == 'e' && name[7] == 'n' && name[8] == 't') { /* setnetent */ return -KEY_setnetent; } goto unknown; case 'w': if (name[1] == 'a' && name[2] == 'n' && name[3] == 't' && name[4] == 'a' && name[5] == 'r' && name[6] == 'r' && name[7] == 'a' && name[8] == 'y') { /* wantarray */ return -KEY_wantarray; } goto unknown; default: goto unknown; } case 10: /* 9 tokens of length 10 */ switch (name[0]) { case 'e': if (name[1] == 'n' && name[2] == 'd') { switch (name[3]) { case 'h': if (name[4] == 'o' && name[5] == 's' && name[6] == 't' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* endhostent */ return -KEY_endhostent; } goto unknown; case 's': if (name[4] == 'e' && name[5] == 'r' && name[6] == 'v' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* endservent */ return -KEY_endservent; } goto unknown; default: goto unknown; } } goto unknown; case 'g': if (name[1] == 'e' && name[2] == 't') { switch (name[3]) { case 'h': if (name[4] == 'o' && name[5] == 's' && name[6] == 't' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* gethostent */ return -KEY_gethostent; } goto unknown; case 's': switch (name[4]) { case 'e': if (name[5] == 'r' && name[6] == 'v' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* getservent */ return -KEY_getservent; } goto unknown; case 'o': if (name[5] == 'c' && name[6] == 'k' && name[7] == 'o' && name[8] == 'p' && name[9] == 't') { /* getsockopt */ return -KEY_getsockopt; } goto unknown; default: goto unknown; } default: goto unknown; } } goto unknown; case 's': switch (name[1]) { case 'e': if (name[2] == 't') { switch (name[3]) { case 'h': if (name[4] == 'o' && name[5] == 's' && name[6] == 't' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* sethostent */ return -KEY_sethostent; } goto unknown; case 's': switch (name[4]) { case 'e': if (name[5] == 'r' && name[6] == 'v' && name[7] == 'e' && name[8] == 'n' && name[9] == 't') { /* setservent */ return -KEY_setservent; } goto unknown; case 'o': if (name[5] == 'c' && name[6] == 'k' && name[7] == 'o' && name[8] == 'p' && name[9] == 't') { /* setsockopt */ return -KEY_setsockopt; } goto unknown; default: goto unknown; } default: goto unknown; } } goto unknown; case 'o': if (name[2] == 'c' && name[3] == 'k' && name[4] == 'e' && name[5] == 't' && name[6] == 'p' && name[7] == 'a' && name[8] == 'i' && name[9] == 'r') { /* socketpair */ return -KEY_socketpair; } goto unknown; default: goto unknown; } default: goto unknown; } case 11: /* 8 tokens of length 11 */ switch (name[0]) { case '_': if (name[1] == '_' && name[2] == 'P' && name[3] == 'A' && name[4] == 'C' && name[5] == 'K' && name[6] == 'A' && name[7] == 'G' && name[8] == 'E' && name[9] == '_' && name[10] == '_') { /* __PACKAGE__ */ return -KEY___PACKAGE__; } goto unknown; case 'e': if (name[1] == 'n' && name[2] == 'd' && name[3] == 'p' && name[4] == 'r' && name[5] == 'o' && name[6] == 't' && name[7] == 'o' && name[8] == 'e' && name[9] == 'n' && name[10] == 't') { /* endprotoent */ return -KEY_endprotoent; } goto unknown; case 'g': if (name[1] == 'e' && name[2] == 't') { switch (name[3]) { case 'p': switch (name[4]) { case 'e': if (name[5] == 'e' && name[6] == 'r' && name[7] == 'n' && name[8] == 'a' && name[9] == 'm' && name[10] == 'e') { /* getpeername */ return -KEY_getpeername; } goto unknown; case 'r': switch (name[5]) { case 'i': if (name[6] == 'o' && name[7] == 'r' && name[8] == 'i' && name[9] == 't' && name[10] == 'y') { /* getpriority */ return -KEY_getpriority; } goto unknown; case 'o': if (name[6] == 't' && name[7] == 'o' && name[8] == 'e' && name[9] == 'n' && name[10] == 't') { /* getprotoent */ return -KEY_getprotoent; } goto unknown; default: goto unknown; } default: goto unknown; } case 's': if (name[4] == 'o' && name[5] == 'c' && name[6] == 'k' && name[7] == 'n' && name[8] == 'a' && name[9] == 'm' && name[10] == 'e') { /* getsockname */ return -KEY_getsockname; } goto unknown; default: goto unknown; } } goto unknown; case 's': if (name[1] == 'e' && name[2] == 't' && name[3] == 'p' && name[4] == 'r') { switch (name[5]) { case 'i': if (name[6] == 'o' && name[7] == 'r' && name[8] == 'i' && name[9] == 't' && name[10] == 'y') { /* setpriority */ return -KEY_setpriority; } goto unknown; case 'o': if (name[6] == 't' && name[7] == 'o' && name[8] == 'e' && name[9] == 'n' && name[10] == 't') { /* setprotoent */ return -KEY_setprotoent; } goto unknown; default: goto unknown; } } goto unknown; default: goto unknown; } case 12: /* 2 tokens of length 12 */ if (name[0] == 'g' && name[1] == 'e' && name[2] == 't' && name[3] == 'n' && name[4] == 'e' && name[5] == 't' && name[6] == 'b' && name[7] == 'y') { switch (name[8]) { case 'a': if (name[9] == 'd' && name[10] == 'd' && name[11] == 'r') { /* getnetbyaddr */ return -KEY_getnetbyaddr; } goto unknown; case 'n': if (name[9] == 'a' && name[10] == 'm' && name[11] == 'e') { /* getnetbyname */ return -KEY_getnetbyname; } goto unknown; default: goto unknown; } } goto unknown; case 13: /* 4 tokens of length 13 */ if (name[0] == 'g' && name[1] == 'e' && name[2] == 't') { switch (name[3]) { case 'h': if (name[4] == 'o' && name[5] == 's' && name[6] == 't' && name[7] == 'b' && name[8] == 'y') { switch (name[9]) { case 'a': if (name[10] == 'd' && name[11] == 'd' && name[12] == 'r') { /* gethostbyaddr */ return -KEY_gethostbyaddr; } goto unknown; case 'n': if (name[10] == 'a' && name[11] == 'm' && name[12] == 'e') { /* gethostbyname */ return -KEY_gethostbyname; } goto unknown; default: goto unknown; } } goto unknown; case 's': if (name[4] == 'e' && name[5] == 'r' && name[6] == 'v' && name[7] == 'b' && name[8] == 'y') { switch (name[9]) { case 'n': if (name[10] == 'a' && name[11] == 'm' && name[12] == 'e') { /* getservbyname */ return -KEY_getservbyname; } goto unknown; case 'p': if (name[10] == 'o' && name[11] == 'r' && name[12] == 't') { /* getservbyport */ return -KEY_getservbyport; } goto unknown; default: goto unknown; } } goto unknown; default: goto unknown; } } goto unknown; case 14: /* 1 tokens of length 14 */ if (name[0] == 'g' && name[1] == 'e' && name[2] == 't' && name[3] == 'p' && name[4] == 'r' && name[5] == 'o' && name[6] == 't' && name[7] == 'o' && name[8] == 'b' && name[9] == 'y' && name[10] == 'n' && name[11] == 'a' && name[12] == 'm' && name[13] == 'e') { /* getprotobyname */ return -KEY_getprotobyname; } goto unknown; case 16: /* 1 tokens of length 16 */ if (name[0] == 'g' && name[1] == 'e' && name[2] == 't' && name[3] == 'p' && name[4] == 'r' && name[5] == 'o' && name[6] == 't' && name[7] == 'o' && name[8] == 'b' && name[9] == 'y' && name[10] == 'n' && name[11] == 'u' && name[12] == 'm' && name[13] == 'b' && name[14] == 'e' && name[15] == 'r') { /* getprotobynumber */ return -KEY_getprotobynumber; } goto unknown; default: goto unknown; } unknown: return 0; } STATIC void S_checkcomma(pTHX_ register char *s, const char *name, const char *what) { dVAR; const char *w; if (*s == ' ' && s[1] == '(') { /* XXX gotta be a better way */ if (ckWARN(WARN_SYNTAX)) { int level = 1; for (w = s+2; *w && level; w++) { if (*w == '(') ++level; else if (*w == ')') --level; } if (*w) for (; *w && isSPACE(*w); w++) ; if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */ Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "%s (...) interpreted as function",name); } } while (s < PL_bufend && isSPACE(*s)) s++; if (*s == '(') s++; while (s < PL_bufend && isSPACE(*s)) s++; if (isIDFIRST_lazy_if(s,UTF)) { w = s++; while (isALNUM_lazy_if(s,UTF)) s++; while (s < PL_bufend && isSPACE(*s)) s++; if (*s == ',') { I32 kw; *s = '\0'; /* XXX If we didn't do this, we could const a lot of toke.c */ kw = keyword(w, s - w) || get_cv(w, FALSE) != 0; *s = ','; if (kw) return; Perl_croak(aTHX_ "No comma allowed after %s", what); } } } /* Either returns sv, or mortalizes sv and returns a new SV*. Best used as sv=new_constant(..., sv, ...). If s, pv are NULL, calls subroutine with one argument, and type is used with error messages only. */ STATIC SV * S_new_constant(pTHX_ const char *s, STRLEN len, const char *key, SV *sv, SV *pv, const char *type) { dVAR; dSP; HV * const table = GvHV(PL_hintgv); /* ^H */ SV *res; SV **cvp; SV *cv, *typesv; const char *why1 = "", *why2 = "", *why3 = ""; if (!table || !(PL_hints & HINT_LOCALIZE_HH)) { SV *msg; why2 = strEQ(key,"charnames") ? "(possibly a missing \"use charnames ...\")" : ""; msg = Perl_newSVpvf(aTHX_ "Constant(%s) unknown: %s", (type ? type: "undef"), why2); /* This is convoluted and evil ("goto considered harmful") * but I do not understand the intricacies of all the different * failure modes of %^H in here. The goal here is to make * the most probable error message user-friendly. --jhi */ goto msgdone; report: msg = Perl_newSVpvf(aTHX_ "Constant(%s): %s%s%s", (type ? type: "undef"), why1, why2, why3); msgdone: yyerror(SvPVX_const(msg)); SvREFCNT_dec(msg); return sv; } cvp = hv_fetch(table, key, strlen(key), FALSE); if (!cvp || !SvOK(*cvp)) { why1 = "$^H{"; why2 = key; why3 = "} is not defined"; goto report; } sv_2mortal(sv); /* Parent created it permanently */ cv = *cvp; if (!pv && s) pv = sv_2mortal(newSVpvn(s, len)); if (type && pv) typesv = sv_2mortal(newSVpv(type, 0)); else typesv = &PL_sv_undef; PUSHSTACKi(PERLSI_OVERLOAD); ENTER ; SAVETMPS; PUSHMARK(SP) ; EXTEND(sp, 3); if (pv) PUSHs(pv); PUSHs(sv); if (pv) PUSHs(typesv); PUTBACK; call_sv(cv, G_SCALAR | ( PL_in_eval ? 0 : G_EVAL)); SPAGAIN ; /* Check the eval first */ if (!PL_in_eval && SvTRUE(ERRSV)) { sv_catpvs(ERRSV, "Propagated"); yyerror(SvPV_nolen_const(ERRSV)); /* Duplicates the message inside eval */ (void)POPs; res = SvREFCNT_inc(sv); } else { res = POPs; (void)SvREFCNT_inc(res); } PUTBACK ; FREETMPS ; LEAVE ; POPSTACK; if (!SvOK(res)) { why1 = "Call to &{$^H{"; why2 = key; why3 = "}} did not return a defined value"; sv = res; goto report; } return res; } /* Returns a NUL terminated string, with the length of the string written to *slp */ STATIC char * S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp) { dVAR; register char *d = dest; register char * const e = d + destlen - 3; /* two-character token, ending NUL */ for (;;) { if (d >= e) Perl_croak(aTHX_ ident_too_long); if (isALNUM(*s)) /* UTF handled below */ *d++ = *s++; else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) { *d++ = ':'; *d++ = ':'; s++; } else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') { *d++ = *s++; *d++ = *s++; } else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) { char *t = s + UTF8SKIP(s); while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t)) t += UTF8SKIP(t); if (d + (t - s) > e) Perl_croak(aTHX_ ident_too_long); Copy(s, d, t - s, char); d += t - s; s = t; } else { *d = '\0'; *slp = d - dest; return s; } } } STATIC char * S_scan_ident(pTHX_ register char *s, register const char *send, char *dest, STRLEN destlen, I32 ck_uni) { dVAR; char *bracket = NULL; char funny = *s++; register char *d = dest; register char * const e = d + destlen + 3; /* two-character token, ending NUL */ if (isSPACE(*s)) s = skipspace(s); if (isDIGIT(*s)) { while (isDIGIT(*s)) { if (d >= e) Perl_croak(aTHX_ ident_too_long); *d++ = *s++; } } else { for (;;) { if (d >= e) Perl_croak(aTHX_ ident_too_long); if (isALNUM(*s)) /* UTF handled below */ *d++ = *s++; else if (*s == '\'' && isIDFIRST_lazy_if(s+1,UTF)) { *d++ = ':'; *d++ = ':'; s++; } else if (*s == ':' && s[1] == ':') { *d++ = *s++; *d++ = *s++; } else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) { char *t = s + UTF8SKIP(s); while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t)) t += UTF8SKIP(t); if (d + (t - s) > e) Perl_croak(aTHX_ ident_too_long); Copy(s, d, t - s, char); d += t - s; s = t; } else break; } } *d = '\0'; d = dest; if (*d) { if (PL_lex_state != LEX_NORMAL) PL_lex_state = LEX_INTERPENDMAYBE; return s; } if (*s == '$' && s[1] && (isALNUM_lazy_if(s+1,UTF) || s[1] == '$' || s[1] == '{' || strnEQ(s+1,"::",2)) ) { return s; } if (*s == '{') { bracket = s; s++; } else if (ck_uni) check_uni(); if (s < send) *d = *s++; d[1] = '\0'; if (*d == '^' && *s && isCONTROLVAR(*s)) { *d = toCTRL(*s); s++; } if (bracket) { if (isSPACE(s[-1])) { while (s < send) { const char ch = *s++; if (!SPACE_OR_TAB(ch)) { *d = ch; break; } } } if (isIDFIRST_lazy_if(d,UTF)) { d++; if (UTF) { char *end = s; while ((end < send && isALNUM_lazy_if(end,UTF)) || *end == ':') { end += UTF8SKIP(end); while (end < send && UTF8_IS_CONTINUED(*end) && is_utf8_mark((U8*)end)) end += UTF8SKIP(end); } Copy(s, d, end - s, char); d += end - s; s = end; } else { while ((isALNUM(*s) || *s == ':') && d < e) *d++ = *s++; if (d >= e) Perl_croak(aTHX_ ident_too_long); } *d = '\0'; while (s < send && SPACE_OR_TAB(*s)) s++; if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) { if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) { const char *brack = *s == '[' ? "[...]" : "{...}"; Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Ambiguous use of %c{%s%s} resolved to %c%s%s", funny, dest, brack, funny, dest, brack); } bracket++; PL_lex_brackstack[PL_lex_brackets++] = (char)(XOPERATOR | XFAKEBRACK); return s; } } /* Handle extended ${^Foo} variables * 1999-02-27 mjd-perl-patch@plover.com */ else if (!isALNUM(*d) && !isPRINT(*d) /* isCTRL(d) */ && isALNUM(*s)) { d++; while (isALNUM(*s) && d < e) { *d++ = *s++; } if (d >= e) Perl_croak(aTHX_ ident_too_long); *d = '\0'; } if (*s == '}') { s++; if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets) { PL_lex_state = LEX_INTERPEND; PL_expect = XREF; } if (funny == '#') funny = '@'; if (PL_lex_state == LEX_NORMAL) { if (ckWARN(WARN_AMBIGUOUS) && (keyword(dest, d - dest) || get_cv(dest, FALSE))) { Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS), "Ambiguous use of %c{%s} resolved to %c%s", funny, dest, funny, dest); } } } else { s = bracket; /* let the parser handle it */ *dest = '\0'; } } else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s)) PL_lex_state = LEX_INTERPEND; return s; } void Perl_pmflag(pTHX_ U32* pmfl, int ch) { if (ch == 'i') *pmfl |= PMf_FOLD; else if (ch == 'g') *pmfl |= PMf_GLOBAL; else if (ch == 'c') *pmfl |= PMf_CONTINUE; else if (ch == 'o') *pmfl |= PMf_KEEP; else if (ch == 'm') *pmfl |= PMf_MULTILINE; else if (ch == 's') *pmfl |= PMf_SINGLELINE; else if (ch == 'x') *pmfl |= PMf_EXTENDED; } STATIC char * S_scan_pat(pTHX_ char *start, I32 type) { dVAR; PMOP *pm; char *s = scan_str(start,FALSE,FALSE); const char * const valid_flags = (type == OP_QR) ? "iomsx" : "iogcmsx"; if (!s) { const char * const delimiter = skipspace(start); Perl_croak(aTHX_ *delimiter == '?' ? "Search pattern not terminated or ternary operator parsed as search pattern" : "Search pattern not terminated" ); } pm = (PMOP*)newPMOP(type, 0); if (PL_multi_open == '?') pm->op_pmflags |= PMf_ONCE; while (*s && strchr(valid_flags, *s)) pmflag(&pm->op_pmflags,*s++); /* issue a warning if /c is specified,but /g is not */ if ((pm->op_pmflags & PMf_CONTINUE) && !(pm->op_pmflags & PMf_GLOBAL) && ckWARN(WARN_REGEXP)) { Perl_warner(aTHX_ packWARN(WARN_REGEXP), "Use of /c modifier is meaningless without /g" ); } pm->op_pmpermflags = pm->op_pmflags; PL_lex_op = (OP*)pm; yylval.ival = OP_MATCH; return s; } STATIC char * S_scan_subst(pTHX_ char *start) { dVAR; register char *s; register PMOP *pm; I32 first_start; I32 es = 0; yylval.ival = OP_NULL; s = scan_str(start,FALSE,FALSE); if (!s) Perl_croak(aTHX_ "Substitution pattern not terminated"); if (s[-1] == PL_multi_open) s--; first_start = PL_multi_start; s = scan_str(s,FALSE,FALSE); if (!s) { if (PL_lex_stuff) { SvREFCNT_dec(PL_lex_stuff); PL_lex_stuff = Nullsv; } Perl_croak(aTHX_ "Substitution replacement not terminated"); } PL_multi_start = first_start; /* so whole substitution is taken together */ pm = (PMOP*)newPMOP(OP_SUBST, 0); while (*s) { if (*s == 'e') { s++; es++; } else if (strchr("iogcmsx", *s)) pmflag(&pm->op_pmflags,*s++); else break; } if ((pm->op_pmflags & PMf_CONTINUE) && ckWARN(WARN_REGEXP)) { Perl_warner(aTHX_ packWARN(WARN_REGEXP), "Use of /c modifier is meaningless in s///" ); } if (es) { SV * const repl = newSVpvs(""); PL_sublex_info.super_bufptr = s; PL_sublex_info.super_bufend = PL_bufend; PL_multi_end = 0; pm->op_pmflags |= PMf_EVAL; while (es-- > 0) sv_catpv(repl, es ? "eval " : "do "); sv_catpvs(repl, "{ "); sv_catsv(repl, PL_lex_repl); sv_catpvs(repl, " }"); SvEVALED_on(repl); SvREFCNT_dec(PL_lex_repl); PL_lex_repl = repl; } pm->op_pmpermflags = pm->op_pmflags; PL_lex_op = (OP*)pm; yylval.ival = OP_SUBST; return s; } STATIC char * S_scan_trans(pTHX_ char *start) { dVAR; register char* s; OP *o; short *tbl; I32 squash; I32 del; I32 complement; yylval.ival = OP_NULL; s = scan_str(start,FALSE,FALSE); if (!s) Perl_croak(aTHX_ "Transliteration pattern not terminated"); if (s[-1] == PL_multi_open) s--; s = scan_str(s,FALSE,FALSE); if (!s) { if (PL_lex_stuff) { SvREFCNT_dec(PL_lex_stuff); PL_lex_stuff = Nullsv; } Perl_croak(aTHX_ "Transliteration replacement not terminated"); } complement = del = squash = 0; while (1) { switch (*s) { case 'c': complement = OPpTRANS_COMPLEMENT; break; case 'd': del = OPpTRANS_DELETE; break; case 's': squash = OPpTRANS_SQUASH; break; default: goto no_more; } s++; } no_more: Newx(tbl, complement&&!del?258:256, short); o = newPVOP(OP_TRANS, 0, (char*)tbl); o->op_private &= ~OPpTRANS_ALL; o->op_private |= del|squash|complement| (DO_UTF8(PL_lex_stuff)? OPpTRANS_FROM_UTF : 0)| (DO_UTF8(PL_lex_repl) ? OPpTRANS_TO_UTF : 0); PL_lex_op = o; yylval.ival = OP_TRANS; return s; } STATIC char * S_scan_heredoc(pTHX_ register char *s) { dVAR; SV *herewas; I32 op_type = OP_SCALAR; I32 len; SV *tmpstr; char term; const char *found_newline; register char *d; register char *e; char *peek; const int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR)); s += 2; d = PL_tokenbuf; e = PL_tokenbuf + sizeof PL_tokenbuf - 1; if (!outer) *d++ = '\n'; for (peek = s; SPACE_OR_TAB(*peek); peek++) ; if (*peek == '`' || *peek == '\'' || *peek =='"') { s = peek; term = *s++; s = delimcpy(d, e, s, PL_bufend, term, &len); d += len; if (s < PL_bufend) s++; } else { if (*s == '\\') s++, term = '\''; else term = '"'; if (!isALNUM_lazy_if(s,UTF)) deprecate_old("bare << to mean <<\"\""); for (; isALNUM_lazy_if(s,UTF); s++) { if (d < e) *d++ = *s; } } if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1) Perl_croak(aTHX_ "Delimiter for here document is too long"); *d++ = '\n'; *d = '\0'; len = d - PL_tokenbuf; #ifndef PERL_STRICT_CR d = strchr(s, '\r'); if (d) { char * const olds = s; s = d; while (s < PL_bufend) { if (*s == '\r') { *d++ = '\n'; if (*++s == '\n') s++; } else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */ *d++ = *s++; s++; } else *d++ = *s++; } *d = '\0'; PL_bufend = d; SvCUR_set(PL_linestr, PL_bufend - SvPVX_const(PL_linestr)); s = olds; } #endif if ( outer || !(found_newline = memchr(s, '\n', PL_bufend - s)) ) { herewas = newSVpvn(s,PL_bufend-s); } else { s--; herewas = newSVpvn(s,found_newline-s); } s += SvCUR(herewas); tmpstr = newSV(79); sv_upgrade(tmpstr, SVt_PVIV); if (term == '\'') { op_type = OP_CONST; SvIV_set(tmpstr, -1); } else if (term == '`') { op_type = OP_BACKTICK; SvIV_set(tmpstr, '\\'); } CLINE; PL_multi_start = CopLINE(PL_curcop); PL_multi_open = PL_multi_close = '<'; term = *PL_tokenbuf; if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) { char * const bufptr = PL_sublex_info.super_bufptr; char * const bufend = PL_sublex_info.super_bufend; char * const olds = s - SvCUR(herewas); s = strchr(bufptr, '\n'); if (!s) s = bufend; d = s; while (s < bufend && (*s != term || memNE(s,PL_tokenbuf,len)) ) { if (*s++ == '\n') CopLINE_inc(PL_curcop); } if (s >= bufend) { CopLINE_set(PL_curcop, (line_t)PL_multi_start); missingterm(PL_tokenbuf); } sv_setpvn(herewas,bufptr,d-bufptr+1); sv_setpvn(tmpstr,d+1,s-d); s += len - 1; sv_catpvn(herewas,s,bufend-s); Copy(SvPVX_const(herewas),bufptr,SvCUR(herewas) + 1,char); s = olds; goto retval; } else if (!outer) { d = s; while (s < PL_bufend && (*s != term || memNE(s,PL_tokenbuf,len)) ) { if (*s++ == '\n') CopLINE_inc(PL_curcop); } if (s >= PL_bufend) { CopLINE_set(PL_curcop, (line_t)PL_multi_start); missingterm(PL_tokenbuf); } sv_setpvn(tmpstr,d+1,s-d); s += len - 1; CopLINE_inc(PL_curcop); /* the preceding stmt passes a newline */ sv_catpvn(herewas,s,PL_bufend-s); sv_setsv(PL_linestr,herewas); PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; } else sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */ while (s >= PL_bufend) { /* multiple line string? */ if (!outer || !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) { CopLINE_set(PL_curcop, (line_t)PL_multi_start); missingterm(PL_tokenbuf); } CopLINE_inc(PL_curcop); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; #ifndef PERL_STRICT_CR if (PL_bufend - PL_linestart >= 2) { if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') || (PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r')) { PL_bufend[-2] = '\n'; PL_bufend--; SvCUR_set(PL_linestr, PL_bufend - SvPVX_const(PL_linestr)); } else if (PL_bufend[-1] == '\r') PL_bufend[-1] = '\n'; } else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r') PL_bufend[-1] = '\n'; #endif if (PERLDB_LINE && PL_curstash != PL_debstash) { SV * const sv = newSV(0); sv_upgrade(sv, SVt_PVMG); sv_setsv(sv,PL_linestr); (void)SvIOK_on(sv); SvIV_set(sv, 0); av_store(CopFILEAVx(PL_curcop), (I32)CopLINE(PL_curcop),sv); } if (*s == term && memEQ(s,PL_tokenbuf,len)) { STRLEN off = PL_bufend - 1 - SvPVX_const(PL_linestr); *(SvPVX(PL_linestr) + off ) = ' '; sv_catsv(PL_linestr,herewas); PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); s = SvPVX(PL_linestr) + off; /* In case PV of PL_linestr moved. */ } else { s = PL_bufend; sv_catsv(tmpstr,PL_linestr); } } s++; retval: PL_multi_end = CopLINE(PL_curcop); if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) { SvPV_shrink_to_cur(tmpstr); } SvREFCNT_dec(herewas); if (!IN_BYTES) { if (UTF && is_utf8_string((U8*)SvPVX_const(tmpstr), SvCUR(tmpstr))) SvUTF8_on(tmpstr); else if (PL_encoding) sv_recode_to_utf8(tmpstr, PL_encoding); } PL_lex_stuff = tmpstr; yylval.ival = op_type; return s; } /* scan_inputsymbol takes: current position in input buffer returns: new position in input buffer side-effects: yylval and lex_op are set. This code handles: <> read from ARGV read from filehandle read from package qualified filehandle read from package qualified filehandle <$fh> read from filehandle in $fh <*.h> filename glob */ STATIC char * S_scan_inputsymbol(pTHX_ char *start) { dVAR; register char *s = start; /* current position in buffer */ char *end; I32 len; char *d = PL_tokenbuf; /* start of temp holding space */ const char * const e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */ end = strchr(s, '\n'); if (!end) end = PL_bufend; s = delimcpy(d, e, s + 1, end, '>', &len); /* extract until > */ /* die if we didn't have space for the contents of the <>, or if it didn't end, or if we see a newline */ if (len >= sizeof PL_tokenbuf) Perl_croak(aTHX_ "Excessively long <> operator"); if (s >= end) Perl_croak(aTHX_ "Unterminated <> operator"); s++; /* check for <$fh> Remember, only scalar variables are interpreted as filehandles by this code. Anything more complex (e.g., <$fh{$num}>) will be treated as a glob() call. This code makes use of the fact that except for the $ at the front, a scalar variable and a filehandle look the same. */ if (*d == '$' && d[1]) d++; /* allow or */ while (*d && (isALNUM_lazy_if(d,UTF) || *d == '\'' || *d == ':')) d++; /* If we've tried to read what we allow filehandles to look like, and there's still text left, then it must be a glob() and not a getline. Use scan_str to pull out the stuff between the <> and treat it as nothing more than a string. */ if (d - PL_tokenbuf != len) { yylval.ival = OP_GLOB; set_csh(); s = scan_str(start,FALSE,FALSE); if (!s) Perl_croak(aTHX_ "Glob not terminated"); return s; } else { bool readline_overriden = FALSE; GV *gv_readline; GV **gvp; /* we're in a filehandle read situation */ d = PL_tokenbuf; /* turn <> into */ if (!len) Copy("ARGV",d,5,char); /* Check whether readline() is overriden */ gv_readline = gv_fetchpvs("readline", 0, SVt_PVCV); if ((gv_readline && GvCVu(gv_readline) && GvIMPORTED_CV(gv_readline)) || ((gvp = (GV**)hv_fetchs(PL_globalstash, "readline", FALSE)) && (gv_readline = *gvp) != (GV*)&PL_sv_undef && GvCVu(gv_readline) && GvIMPORTED_CV(gv_readline))) readline_overriden = TRUE; /* if <$fh>, create the ops to turn the variable into a filehandle */ if (*d == '$') { I32 tmp; /* try to find it in the pad for this block, otherwise find add symbol table ops */ if ((tmp = pad_findmy(d)) != NOT_IN_PAD) { if (PAD_COMPNAME_FLAGS(tmp) & SVpad_OUR) { HV * const stash = PAD_COMPNAME_OURSTASH(tmp); HEK * const stashname = HvNAME_HEK(stash); SV * const sym = sv_2mortal(newSVhek(stashname)); sv_catpvs(sym, "::"); sv_catpv(sym, d+1); d = SvPVX(sym); goto intro_sym; } else { OP * const o = newOP(OP_PADSV, 0); o->op_targ = tmp; PL_lex_op = readline_overriden ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, o, newCVREF(0, newGVOP(OP_GV,0,gv_readline)))) : (OP*)newUNOP(OP_READLINE, 0, o); } } else { GV *gv; ++d; intro_sym: gv = gv_fetchpv(d, (PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : GV_ADDMULTI), SVt_PV); PL_lex_op = readline_overriden ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, newUNOP(OP_RV2SV, 0, newGVOP(OP_GV, 0, gv)), newCVREF(0, newGVOP(OP_GV, 0, gv_readline)))) : (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2SV, 0, newGVOP(OP_GV, 0, gv))); } if (!readline_overriden) PL_lex_op->op_flags |= OPf_SPECIAL; /* we created the ops in PL_lex_op, so make yylval.ival a null op */ yylval.ival = OP_NULL; } /* If it's none of the above, it must be a literal filehandle ( or ) so build a simple readline OP */ else { GV * const gv = gv_fetchpv(d, GV_ADD, SVt_PVIO); PL_lex_op = readline_overriden ? (OP*)newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, newGVOP(OP_GV, 0, gv), newCVREF(0, newGVOP(OP_GV, 0, gv_readline)))) : (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv)); yylval.ival = OP_NULL; } } return s; } /* scan_str takes: start position in buffer keep_quoted preserve \ on the embedded delimiter(s) keep_delims preserve the delimiters around the string returns: position to continue reading from buffer side-effects: multi_start, multi_close, lex_repl or lex_stuff, and updates the read buffer. This subroutine pulls a string out of the input. It is called for: q single quotes q(literal text) ' single quotes 'literal text' qq double quotes qq(interpolate $here please) " double quotes "interpolate $here please" qx backticks qx(/bin/ls -l) ` backticks `/bin/ls -l` qw quote words @EXPORT_OK = qw( func() $spam ) m// regexp match m/this/ s/// regexp substitute s/this/that/ tr/// string transliterate tr/this/that/ y/// string transliterate y/this/that/ ($*@) sub prototypes sub foo ($) (stuff) sub attr parameters sub foo : attr(stuff) <> readline or globs , <>, <$fh>, or <*.c> In most of these cases (all but <>, patterns and transliterate) yylex() calls scan_str(). m// makes yylex() call scan_pat() which calls scan_str(). s/// makes yylex() call scan_subst() which calls scan_str(). tr/// and y/// make yylex() call scan_trans() which calls scan_str(). It skips whitespace before the string starts, and treats the first character as the delimiter. If the delimiter is one of ([{< then the corresponding "close" character )]}> is used as the closing delimiter. It allows quoting of delimiters, and if the string has balanced delimiters ([{<>}]) it allows nesting. On success, the SV with the resulting string is put into lex_stuff or, if that is already non-NULL, into lex_repl. The second case occurs only when parsing the RHS of the special constructs s/// and tr/// (y///). For convenience, the terminating delimiter character is stuffed into SvIVX of the SV. */ STATIC char * S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims) { dVAR; SV *sv; /* scalar value: string */ char *tmps; /* temp string, used for delimiter matching */ register char *s = start; /* current position in the buffer */ register char term; /* terminating character */ register char *to; /* current position in the sv's data */ I32 brackets = 1; /* bracket nesting level */ bool has_utf8 = FALSE; /* is there any utf8 content? */ I32 termcode; /* terminating char. code */ U8 termstr[UTF8_MAXBYTES]; /* terminating string */ STRLEN termlen; /* length of terminating string */ char *last = NULL; /* last position for nesting bracket */ /* skip space before the delimiter */ if (isSPACE(*s)) s = skipspace(s); /* mark where we are, in case we need to report errors */ CLINE; /* after skipping whitespace, the next character is the terminator */ term = *s; if (!UTF) { termcode = termstr[0] = term; termlen = 1; } else { termcode = utf8_to_uvchr((U8*)s, &termlen); Copy(s, termstr, termlen, U8); if (!UTF8_IS_INVARIANT(term)) has_utf8 = TRUE; } /* mark where we are */ PL_multi_start = CopLINE(PL_curcop); PL_multi_open = term; /* find corresponding closing delimiter */ if (term && (tmps = strchr("([{< )]}> )]}>",term))) termcode = termstr[0] = term = tmps[5]; PL_multi_close = term; /* create a new SV to hold the contents. 79 is the SV's initial length. What a random number. */ sv = newSV(79); sv_upgrade(sv, SVt_PVIV); SvIV_set(sv, termcode); (void)SvPOK_only(sv); /* validate pointer */ /* move past delimiter and try to read a complete string */ if (keep_delims) sv_catpvn(sv, s, termlen); s += termlen; for (;;) { if (PL_encoding && !UTF) { bool cont = TRUE; while (cont) { int offset = s - SvPVX_const(PL_linestr); const bool found = sv_cat_decode(sv, PL_encoding, PL_linestr, &offset, (char*)termstr, termlen); const char * const ns = SvPVX_const(PL_linestr) + offset; char * const svlast = SvEND(sv) - 1; for (; s < ns; s++) { if (*s == '\n' && !PL_rsfp) CopLINE_inc(PL_curcop); } if (!found) goto read_more_line; else { /* handle quoted delimiters */ if (SvCUR(sv) > 1 && *(svlast-1) == '\\') { const char *t; for (t = svlast-2; t >= SvPVX_const(sv) && *t == '\\';) t--; if ((svlast-1 - t) % 2) { if (!keep_quoted) { *(svlast-1) = term; *svlast = '\0'; SvCUR_set(sv, SvCUR(sv) - 1); } continue; } } if (PL_multi_open == PL_multi_close) { cont = FALSE; } else { const char *t; char *w; if (!last) last = SvPVX(sv); for (t = w = last; t < svlast; w++, t++) { /* At here, all closes are "was quoted" one, so we don't check PL_multi_close. */ if (*t == '\\') { if (!keep_quoted && *(t+1) == PL_multi_open) t++; else *w++ = *t++; } else if (*t == PL_multi_open) brackets++; *w = *t; } if (w < t) { *w++ = term; *w = '\0'; SvCUR_set(sv, w - SvPVX_const(sv)); } last = w; if (--brackets <= 0) cont = FALSE; } } } if (!keep_delims) { SvCUR_set(sv, SvCUR(sv) - 1); *SvEND(sv) = '\0'; } break; } /* extend sv if need be */ SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1); /* set 'to' to the next character in the sv's string */ to = SvPVX(sv)+SvCUR(sv); /* if open delimiter is the close delimiter read unbridle */ if (PL_multi_open == PL_multi_close) { for (; s < PL_bufend; s++,to++) { /* embedded newlines increment the current line number */ if (*s == '\n' && !PL_rsfp) CopLINE_inc(PL_curcop); /* handle quoted delimiters */ if (*s == '\\' && s+1 < PL_bufend && term != '\\') { if (!keep_quoted && s[1] == term) s++; /* any other quotes are simply copied straight through */ else *to++ = *s++; } /* terminate when run out of buffer (the for() condition), or have found the terminator */ else if (*s == term) { if (termlen == 1) break; if (s+termlen <= PL_bufend && memEQ(s, (char*)termstr, termlen)) break; } else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF) has_utf8 = TRUE; *to = *s; } } /* if the terminator isn't the same as the start character (e.g., matched brackets), we have to allow more in the quoting, and be prepared for nested brackets. */ else { /* read until we run out of string, or we find the terminator */ for (; s < PL_bufend; s++,to++) { /* embedded newlines increment the line count */ if (*s == '\n' && !PL_rsfp) CopLINE_inc(PL_curcop); /* backslashes can escape the open or closing characters */ if (*s == '\\' && s+1 < PL_bufend) { if (!keep_quoted && ((s[1] == PL_multi_open) || (s[1] == PL_multi_close))) s++; else *to++ = *s++; } /* allow nested opens and closes */ else if (*s == PL_multi_close && --brackets <= 0) break; else if (*s == PL_multi_open) brackets++; else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF) has_utf8 = TRUE; *to = *s; } } /* terminate the copied string and update the sv's end-of-string */ *to = '\0'; SvCUR_set(sv, to - SvPVX_const(sv)); /* * this next chunk reads more into the buffer if we're not done yet */ if (s < PL_bufend) break; /* handle case where we are done yet :-) */ #ifndef PERL_STRICT_CR if (to - SvPVX_const(sv) >= 2) { if ((to[-2] == '\r' && to[-1] == '\n') || (to[-2] == '\n' && to[-1] == '\r')) { to[-2] = '\n'; to--; SvCUR_set(sv, to - SvPVX_const(sv)); } else if (to[-1] == '\r') to[-1] = '\n'; } else if (to - SvPVX_const(sv) == 1 && to[-1] == '\r') to[-1] = '\n'; #endif read_more_line: /* if we're out of file, or a read fails, bail and reset the current line marker so we can report where the unterminated string began */ if (!PL_rsfp || !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) { sv_free(sv); CopLINE_set(PL_curcop, (line_t)PL_multi_start); return Nullch; } /* we read a line, so increment our line counter */ CopLINE_inc(PL_curcop); /* update debugger info */ if (PERLDB_LINE && PL_curstash != PL_debstash) { SV * const sv = newSV(0); sv_upgrade(sv, SVt_PVMG); sv_setsv(sv,PL_linestr); (void)SvIOK_on(sv); SvIV_set(sv, 0); av_store(CopFILEAVx(PL_curcop), (I32)CopLINE(PL_curcop), sv); } /* having changed the buffer, we must update PL_bufend */ PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; } /* at this point, we have successfully read the delimited string */ if (!PL_encoding || UTF) { if (keep_delims) sv_catpvn(sv, s, termlen); s += termlen; } if (has_utf8 || PL_encoding) SvUTF8_on(sv); PL_multi_end = CopLINE(PL_curcop); /* if we allocated too much space, give some back */ if (SvCUR(sv) + 5 < SvLEN(sv)) { SvLEN_set(sv, SvCUR(sv) + 1); SvPV_renew(sv, SvLEN(sv)); } /* decide whether this is the first or second quoted string we've read for this op */ if (PL_lex_stuff) PL_lex_repl = sv; else PL_lex_stuff = sv; return s; } /* scan_num takes: pointer to position in buffer returns: pointer to new position in buffer side-effects: builds ops for the constant in yylval.op Read a number in any of the formats that Perl accepts: \d(_?\d)*(\.(\d(_?\d)*)?)?[Ee][\+\-]?(\d(_?\d)*) 12 12.34 12. \.\d(_?\d)*[Ee][\+\-]?(\d(_?\d)*) .34 0b[01](_?[01])* 0[0-7](_?[0-7])* 0x[0-9A-Fa-f](_?[0-9A-Fa-f])* Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the thing it reads. If it reads a number without a decimal point or an exponent, it will try converting the number to an integer and see if it can do so without loss of precision. */ char * Perl_scan_num(pTHX_ const char *start, YYSTYPE* lvalp) { dVAR; register const char *s = start; /* current position in buffer */ register char *d; /* destination in temp buffer */ register char *e; /* end of temp buffer */ NV nv; /* number read, as a double */ SV *sv = Nullsv; /* place to put the converted number */ bool floatit; /* boolean: int or float? */ const char *lastub = NULL; /* position of last underbar */ static char const number_too_long[] = "Number too long"; /* We use the first character to decide what type of number this is */ switch (*s) { default: Perl_croak(aTHX_ "panic: scan_num"); /* if it starts with a 0, it could be an octal number, a decimal in 0.13 disguise, or a hexadecimal number, or a binary number. */ case '0': { /* variables: u holds the "number so far" shift the power of 2 of the base (hex == 4, octal == 3, binary == 1) overflowed was the number more than we can hold? Shift is used when we add a digit. It also serves as an "are we in octal/hex/binary?" indicator to disallow hex characters when in octal mode. */ NV n = 0.0; UV u = 0; I32 shift; bool overflowed = FALSE; bool just_zero = TRUE; /* just plain 0 or binary number? */ static const NV nvshift[5] = { 1.0, 2.0, 4.0, 8.0, 16.0 }; static const char* const bases[5] = { "", "binary", "", "octal", "hexadecimal" }; static const char* const Bases[5] = { "", "Binary", "", "Octal", "Hexadecimal" }; static const char* const maxima[5] = { "", "0b11111111111111111111111111111111", "", "037777777777", "0xffffffff" }; const char *base, *Base, *max; /* check for hex */ if (s[1] == 'x') { shift = 4; s += 2; just_zero = FALSE; } else if (s[1] == 'b') { shift = 1; s += 2; just_zero = FALSE; } /* check for a decimal in disguise */ else if (s[1] == '.' || s[1] == 'e' || s[1] == 'E') goto decimal; /* so it must be octal */ else { shift = 3; s++; } if (*s == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; } base = bases[shift]; Base = Bases[shift]; max = maxima[shift]; /* read the rest of the number */ for (;;) { /* x is used in the overflow test, b is the digit we're adding on. */ UV x, b; switch (*s) { /* if we don't mention it, we're done */ default: goto out; /* _ are ignored -- but warned about if consecutive */ case '_': if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; break; /* 8 and 9 are not octal */ case '8': case '9': if (shift == 3) yyerror(Perl_form(aTHX_ "Illegal octal digit '%c'", *s)); /* FALL THROUGH */ /* octal digits */ case '2': case '3': case '4': case '5': case '6': case '7': if (shift == 1) yyerror(Perl_form(aTHX_ "Illegal binary digit '%c'", *s)); /* FALL THROUGH */ case '0': case '1': b = *s++ & 15; /* ASCII digit -> value of digit */ goto digit; /* hex digits */ case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': /* make sure they said 0x */ if (shift != 4) goto out; b = (*s++ & 7) + 9; /* Prepare to put the digit we have onto the end of the number so far. We check for overflows. */ digit: just_zero = FALSE; if (!overflowed) { x = u << shift; /* make room for the digit */ if ((x >> shift) != u && !(PL_hints & HINT_NEW_BINARY)) { overflowed = TRUE; n = (NV) u; if (ckWARN_d(WARN_OVERFLOW)) Perl_warner(aTHX_ packWARN(WARN_OVERFLOW), "Integer overflow in %s number", base); } else u = x | b; /* add the digit to the end */ } if (overflowed) { n *= nvshift[shift]; /* If an NV has not enough bits in its * mantissa to represent an UV this summing of * small low-order numbers is a waste of time * (because the NV cannot preserve the * low-order bits anyway): we could just * remember when did we overflow and in the * end just multiply n by the right * amount. */ n += (NV) b; } break; } } /* if we get here, we had success: make a scalar value from the number. */ out: /* final misplaced underbar check */ if (s[-1] == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); } sv = newSV(0); if (overflowed) { if (n > 4294967295.0 && ckWARN(WARN_PORTABLE)) Perl_warner(aTHX_ packWARN(WARN_PORTABLE), "%s number > %s non-portable", Base, max); sv_setnv(sv, n); } else { #if UVSIZE > 4 if (u > 0xffffffff && ckWARN(WARN_PORTABLE)) Perl_warner(aTHX_ packWARN(WARN_PORTABLE), "%s number > %s non-portable", Base, max); #endif sv_setuv(sv, u); } if (just_zero && (PL_hints & HINT_NEW_INTEGER)) sv = new_constant(start, s - start, "integer", sv, Nullsv, NULL); else if (PL_hints & HINT_NEW_BINARY) sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL); } break; /* handle decimal numbers. we're also sent here when we read a 0 as the first digit */ case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '.': decimal: d = PL_tokenbuf; e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */ floatit = FALSE; /* read next group of digits and _ and copy into d */ while (isDIGIT(*s) || *s == '_') { /* skip underscores, checking for misplaced ones if -w is on */ if (*s == '_') { if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; } else { /* check for end of fixed-length buffer */ if (d >= e) Perl_croak(aTHX_ number_too_long); /* if we're ok, copy the character */ *d++ = *s++; } } /* final misplaced underbar check */ if (lastub && s == lastub + 1) { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); } /* read a decimal portion if there is one. avoid 3..5 being interpreted as the number 3. followed by .5 */ if (*s == '.' && s[1] != '.') { floatit = TRUE; *d++ = *s++; if (*s == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s; } /* copy, ignoring underbars, until we run out of digits. */ for (; isDIGIT(*s) || *s == '_'; s++) { /* fixed length buffer check */ if (d >= e) Perl_croak(aTHX_ number_too_long); if (*s == '_') { if (lastub && s == lastub + 1 && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s; } else *d++ = *s; } /* fractional part ending in underbar? */ if (s[-1] == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); } if (*s == '.' && isDIGIT(s[1])) { /* oops, it's really a v-string, but without the "v" */ s = start; goto vstring; } } /* read exponent part, if present */ if ((*s == 'e' || *s == 'E') && strchr("+-0123456789_", s[1])) { floatit = TRUE; s++; /* regardless of whether user said 3E5 or 3e5, use lower 'e' */ *d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */ /* stray preinitial _ */ if (*s == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; } /* allow positive or negative exponent */ if (*s == '+' || *s == '-') *d++ = *s++; /* stray initial _ */ if (*s == '_') { if (ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; } /* read digits of exponent */ while (isDIGIT(*s) || *s == '_') { if (isDIGIT(*s)) { if (d >= e) Perl_croak(aTHX_ number_too_long); *d++ = *s++; } else { if (((lastub && s == lastub + 1) || (!isDIGIT(s[1]) && s[1] != '_')) && ckWARN(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number"); lastub = s++; } } } /* make an sv from the string */ sv = newSV(0); /* We try to do an integer conversion first if no characters indicating "float" have been found. */ if (!floatit) { UV uv; const int flags = grok_number (PL_tokenbuf, d - PL_tokenbuf, &uv); if (flags == IS_NUMBER_IN_UV) { if (uv <= IV_MAX) sv_setiv(sv, uv); /* Prefer IVs over UVs. */ else sv_setuv(sv, uv); } else if (flags == (IS_NUMBER_IN_UV | IS_NUMBER_NEG)) { if (uv <= (UV) IV_MIN) sv_setiv(sv, -(IV)uv); else floatit = TRUE; } else floatit = TRUE; } if (floatit) { /* terminate the string */ *d = '\0'; nv = Atof(PL_tokenbuf); sv_setnv(sv, nv); } if ( floatit ? (PL_hints & HINT_NEW_FLOAT) : (PL_hints & HINT_NEW_INTEGER) ) sv = new_constant(PL_tokenbuf, d - PL_tokenbuf, (floatit ? "float" : "integer"), sv, Nullsv, NULL); break; /* if it starts with a v, it could be a v-string */ case 'v': vstring: sv = newSV(5); /* preallocate storage space */ s = scan_vstring(s,sv); break; } /* make the op for the constant and return */ if (sv) lvalp->opval = newSVOP(OP_CONST, 0, sv); else lvalp->opval = Nullop; return (char *)s; } STATIC char * S_scan_formline(pTHX_ register char *s) { dVAR; register char *eol; register char *t; SV * const stuff = newSVpvs(""); bool needargs = FALSE; bool eofmt = FALSE; while (!needargs) { if (*s == '.') { #ifdef PERL_STRICT_CR for (t = s+1;SPACE_OR_TAB(*t); t++) ; #else for (t = s+1;SPACE_OR_TAB(*t) || *t == '\r'; t++) ; #endif if (*t == '\n' || t == PL_bufend) { eofmt = TRUE; break; } } if (PL_in_eval && !PL_rsfp) { eol = (char *) memchr(s,'\n',PL_bufend-s); if (!eol++) eol = PL_bufend; } else eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); if (*s != '#') { for (t = s; t < eol; t++) { if (*t == '~' && t[1] == '~' && SvCUR(stuff)) { needargs = FALSE; goto enough; /* ~~ must be first line in formline */ } if (*t == '@' || *t == '^') needargs = TRUE; } if (eol > s) { sv_catpvn(stuff, s, eol-s); #ifndef PERL_STRICT_CR if (eol-s > 1 && eol[-2] == '\r' && eol[-1] == '\n') { char *end = SvPVX(stuff) + SvCUR(stuff); end[-2] = '\n'; end[-1] = '\0'; SvCUR_set(stuff, SvCUR(stuff) - 1); } #endif } else break; } s = (char*)eol; if (PL_rsfp) { s = filter_gets(PL_linestr, PL_rsfp, 0); PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr); PL_bufend = PL_bufptr + SvCUR(PL_linestr); PL_last_lop = PL_last_uni = Nullch; if (!s) { s = PL_bufptr; break; } } incline(s); } enough: if (SvCUR(stuff)) { PL_expect = XTERM; if (needargs) { PL_lex_state = LEX_NORMAL; PL_nextval[PL_nexttoke].ival = 0; force_next(','); } else PL_lex_state = LEX_FORMLINE; if (!IN_BYTES) { if (UTF && is_utf8_string((U8*)SvPVX_const(stuff), SvCUR(stuff))) SvUTF8_on(stuff); else if (PL_encoding) sv_recode_to_utf8(stuff, PL_encoding); } PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff); force_next(THING); PL_nextval[PL_nexttoke].ival = OP_FORMLINE; force_next(LSTOP); } else { SvREFCNT_dec(stuff); if (eofmt) PL_lex_formbrack = 0; PL_bufptr = s; } return s; } STATIC void S_set_csh(pTHX) { #ifdef CSH dVAR; if (!PL_cshlen) PL_cshlen = strlen(PL_cshname); #endif } I32 Perl_start_subparse(pTHX_ I32 is_format, U32 flags) { dVAR; const I32 oldsavestack_ix = PL_savestack_ix; CV* const outsidecv = PL_compcv; if (PL_compcv) { assert(SvTYPE(PL_compcv) == SVt_PVCV); } SAVEI32(PL_subline); save_item(PL_subname); SAVESPTR(PL_compcv); PL_compcv = (CV*)newSV(0); sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV); CvFLAGS(PL_compcv) |= flags; PL_subline = CopLINE(PL_curcop); CvPADLIST(PL_compcv) = pad_new(padnew_SAVE|padnew_SAVESUB); CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv); CvOUTSIDE_SEQ(PL_compcv) = PL_cop_seqmax; return oldsavestack_ix; } #ifdef __SC__ #pragma segment Perl_yylex #endif int Perl_yywarn(pTHX_ const char *s) { dVAR; PL_in_eval |= EVAL_WARNONLY; yyerror(s); PL_in_eval &= ~EVAL_WARNONLY; return 0; } int Perl_yyerror(pTHX_ const char *s) { dVAR; const char *where = NULL; const char *context = NULL; int contlen = -1; SV *msg; if (!yychar || (yychar == ';' && !PL_rsfp)) where = "at EOF"; else if (PL_oldoldbufptr && PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 && PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) { /* Only for NetWare: The code below is removed for NetWare because it abends/crashes on NetWare when the script has error such as not having the closing quotes like: if ($var eq "value) Checking of white spaces is anyway done in NetWare code. */ #ifndef NETWARE while (isSPACE(*PL_oldoldbufptr)) PL_oldoldbufptr++; #endif context = PL_oldoldbufptr; contlen = PL_bufptr - PL_oldoldbufptr; } else if (PL_oldbufptr && PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 && PL_oldbufptr != PL_bufptr) { /* Only for NetWare: The code below is removed for NetWare because it abends/crashes on NetWare when the script has error such as not having the closing quotes like: if ($var eq "value) Checking of white spaces is anyway done in NetWare code. */ #ifndef NETWARE while (isSPACE(*PL_oldbufptr)) PL_oldbufptr++; #endif context = PL_oldbufptr; contlen = PL_bufptr - PL_oldbufptr; } else if (yychar > 255) where = "next token ???"; else if (yychar == -2) { /* YYEMPTY */ if (PL_lex_state == LEX_NORMAL || (PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL)) where = "at end of line"; else if (PL_lex_inpat) where = "within pattern"; else where = "within string"; } else { SV * const where_sv = sv_2mortal(newSVpvs("next char ")); if (yychar < 32) Perl_sv_catpvf(aTHX_ where_sv, "^%c", toCTRL(yychar)); else if (isPRINT_LC(yychar)) Perl_sv_catpvf(aTHX_ where_sv, "%c", yychar); else Perl_sv_catpvf(aTHX_ where_sv, "\\%03o", yychar & 255); where = SvPVX_const(where_sv); } msg = sv_2mortal(newSVpv(s, 0)); Perl_sv_catpvf(aTHX_ msg, " at %s line %"IVdf", ", OutCopFILE(PL_curcop), (IV)CopLINE(PL_curcop)); if (context) Perl_sv_catpvf(aTHX_ msg, "near \"%.*s\"\n", contlen, context); else Perl_sv_catpvf(aTHX_ msg, "%s\n", where); if (PL_multi_start < PL_multi_end && (U32)(CopLINE(PL_curcop) - PL_multi_end) <= 1) { Perl_sv_catpvf(aTHX_ msg, " (Might be a runaway multi-line %c%c string starting on line %"IVdf")\n", (int)PL_multi_open,(int)PL_multi_close,(IV)PL_multi_start); PL_multi_end = 0; } if (PL_in_eval & EVAL_WARNONLY && ckWARN_d(WARN_SYNTAX)) Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "%"SVf, msg); else qerror(msg); if (PL_error_count >= 10) { if (PL_in_eval && SvCUR(ERRSV)) Perl_croak(aTHX_ "%"SVf"%s has too many errors.\n", ERRSV, OutCopFILE(PL_curcop)); else Perl_croak(aTHX_ "%s has too many errors.\n", OutCopFILE(PL_curcop)); } PL_in_my = 0; PL_in_my_stash = NULL; return 0; } #ifdef __SC__ #pragma segment Main #endif STATIC char* S_swallow_bom(pTHX_ U8 *s) { dVAR; const STRLEN slen = SvCUR(PL_linestr); switch (s[0]) { case 0xFF: if (s[1] == 0xFE) { /* UTF-16 little-endian? (or UTF32-LE?) */ if (s[2] == 0 && s[3] == 0) /* UTF-32 little-endian */ Perl_croak(aTHX_ "Unsupported script encoding UTF32-LE"); #ifndef PERL_NO_UTF16_FILTER if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF16-LE script encoding (BOM)\n"); s += 2; utf16le: if (PL_bufend > (char*)s) { U8 *news; I32 newlen; filter_add(utf16rev_textfilter, NULL); Newx(news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8); utf16_to_utf8_reversed(s, news, PL_bufend - (char*)s - 1, &newlen); sv_setpvn(PL_linestr, (const char*)news, newlen); Safefree(news); SvUTF8_on(PL_linestr); s = (U8*)SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + newlen; } #else Perl_croak(aTHX_ "Unsupported script encoding UTF16-LE"); #endif } break; case 0xFE: if (s[1] == 0xFF) { /* UTF-16 big-endian? */ #ifndef PERL_NO_UTF16_FILTER if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding (BOM)\n"); s += 2; utf16be: if (PL_bufend > (char *)s) { U8 *news; I32 newlen; filter_add(utf16_textfilter, NULL); Newx(news, (PL_bufend - (char*)s) * 3 / 2 + 1, U8); utf16_to_utf8(s, news, PL_bufend - (char*)s, &newlen); sv_setpvn(PL_linestr, (const char*)news, newlen); Safefree(news); SvUTF8_on(PL_linestr); s = (U8*)SvPVX(PL_linestr); PL_bufend = SvPVX(PL_linestr) + newlen; } #else Perl_croak(aTHX_ "Unsupported script encoding UTF16-BE"); #endif } break; case 0xEF: if (slen > 2 && s[1] == 0xBB && s[2] == 0xBF) { if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-8 script encoding (BOM)\n"); s += 3; /* UTF-8 */ } break; case 0: if (slen > 3) { if (s[1] == 0) { if (s[2] == 0xFE && s[3] == 0xFF) { /* UTF-32 big-endian */ Perl_croak(aTHX_ "Unsupported script encoding UTF32-BE"); } } else if (s[2] == 0 && s[3] != 0) { /* Leading bytes * 00 xx 00 xx * are a good indicator of UTF-16BE. */ if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16BE script encoding (no BOM)\n"); goto utf16be; } } default: if (slen > 3 && s[1] == 0 && s[2] != 0 && s[3] == 0) { /* Leading bytes * xx 00 xx 00 * are a good indicator of UTF-16LE. */ if (DEBUG_p_TEST || DEBUG_T_TEST) PerlIO_printf(Perl_debug_log, "UTF-16LE script encoding (no BOM)\n"); goto utf16le; } } return (char*)s; } /* * restore_rsfp * Restore a source filter. */ static void restore_rsfp(pTHX_ void *f) { dVAR; PerlIO * const fp = (PerlIO*)f; if (PL_rsfp == PerlIO_stdin()) PerlIO_clearerr(PL_rsfp); else if (PL_rsfp && (PL_rsfp != fp)) PerlIO_close(PL_rsfp); PL_rsfp = fp; } #ifndef PERL_NO_UTF16_FILTER static I32 utf16_textfilter(pTHX_ int idx, SV *sv, int maxlen) { dVAR; const STRLEN old = SvCUR(sv); const I32 count = FILTER_READ(idx+1, sv, maxlen); DEBUG_P(PerlIO_printf(Perl_debug_log, "utf16_textfilter(%p): %d %d (%d)\n", utf16_textfilter, idx, maxlen, (int) count)); if (count) { U8* tmps; I32 newlen; Newx(tmps, SvCUR(sv) * 3 / 2 + 1, U8); Copy(SvPVX_const(sv), tmps, old, char); utf16_to_utf8((U8*)SvPVX_const(sv) + old, tmps + old, SvCUR(sv) - old, &newlen); sv_usepvn(sv, (char*)tmps, (STRLEN)newlen + old); } DEBUG_P({sv_dump(sv);}); return SvCUR(sv); } static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen) { dVAR; const STRLEN old = SvCUR(sv); const I32 count = FILTER_READ(idx+1, sv, maxlen); DEBUG_P(PerlIO_printf(Perl_debug_log, "utf16rev_textfilter(%p): %d %d (%d)\n", utf16rev_textfilter, idx, maxlen, (int) count)); if (count) { U8* tmps; I32 newlen; Newx(tmps, SvCUR(sv) * 3 / 2 + 1, U8); Copy(SvPVX_const(sv), tmps, old, char); utf16_to_utf8((U8*)SvPVX_const(sv) + old, tmps + old, SvCUR(sv) - old, &newlen); sv_usepvn(sv, (char*)tmps, (STRLEN)newlen + old); } DEBUG_P({ sv_dump(sv); }); return count; } #endif /* Returns a pointer to the next character after the parsed vstring, as well as updating the passed in sv. Function must be called like sv = newSV(5); s = scan_vstring(s,sv); The sv should already be large enough to store the vstring passed in, for performance reasons. */ char * Perl_scan_vstring(pTHX_ const char *s, SV *sv) { dVAR; const char *pos = s; const char *start = s; if (*pos == 'v') pos++; /* get past 'v' */ while (pos < PL_bufend && (isDIGIT(*pos) || *pos == '_')) pos++; if ( *pos != '.') { /* this may not be a v-string if followed by => */ const char *next = pos; while (next < PL_bufend && isSPACE(*next)) ++next; if ((PL_bufend - next) >= 2 && *next == '=' && next[1] == '>' ) { /* return string not v-string */ sv_setpvn(sv,(char *)s,pos-s); return (char *)pos; } } if (!isALPHA(*pos)) { U8 tmpbuf[UTF8_MAXBYTES+1]; if (*s == 'v') s++; /* get past 'v' */ sv_setpvn(sv, "", 0); for (;;) { U8 *tmpend; UV rev = 0; { /* this is atoi() that tolerates underscores */ const char *end = pos; UV mult = 1; while (--end >= s) { UV orev; if (*end == '_') continue; orev = rev; rev += (*end - '0') * mult; mult *= 10; if (orev > rev && ckWARN_d(WARN_OVERFLOW)) Perl_warner(aTHX_ packWARN(WARN_OVERFLOW), "Integer overflow in decimal number"); } } #ifdef EBCDIC if (rev > 0x7FFFFFFF) Perl_croak(aTHX_ "In EBCDIC the v-string components cannot exceed 2147483647"); #endif /* Append native character for the rev point */ tmpend = uvchr_to_utf8(tmpbuf, rev); sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf); if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev))) SvUTF8_on(sv); if (pos + 1 < PL_bufend && *pos == '.' && isDIGIT(pos[1])) s = ++pos; else { s = pos; break; } while (pos < PL_bufend && (isDIGIT(*pos) || *pos == '_')) pos++; } SvPOK_on(sv); sv_magic(sv,NULL,PERL_MAGIC_vstring,(const char*)start, pos-start); SvRMAGICAL_on(sv); } return (char *)s; } /* * Local variables: * c-indentation-style: bsd * c-basic-offset: 4 * indent-tabs-mode: t * End: * * ex: set ts=8 sts=4 sw=4 noet: */