| 1 | /* pp_ctl.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * Now far ahead the Road has gone, |
| 13 | * And I must follow, if I can, |
| 14 | * Pursuing it with eager feet, |
| 15 | * Until it joins some larger way |
| 16 | * Where many paths and errands meet. |
| 17 | * And whither then? I cannot say. |
| 18 | * |
| 19 | * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
| 20 | */ |
| 21 | |
| 22 | /* This file contains control-oriented pp ("push/pop") functions that |
| 23 | * execute the opcodes that make up a perl program. A typical pp function |
| 24 | * expects to find its arguments on the stack, and usually pushes its |
| 25 | * results onto the stack, hence the 'pp' terminology. Each OP structure |
| 26 | * contains a pointer to the relevant pp_foo() function. |
| 27 | * |
| 28 | * Control-oriented means things like pp_enteriter() and pp_next(), which |
| 29 | * alter the flow of control of the program. |
| 30 | */ |
| 31 | |
| 32 | |
| 33 | #include "EXTERN.h" |
| 34 | #define PERL_IN_PP_CTL_C |
| 35 | #include "perl.h" |
| 36 | |
| 37 | #define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o)) |
| 38 | |
| 39 | #define dopoptosub(plop) dopoptosub_at(cxstack, (plop)) |
| 40 | |
| 41 | PP(pp_wantarray) |
| 42 | { |
| 43 | dSP; |
| 44 | I32 cxix; |
| 45 | const PERL_CONTEXT *cx; |
| 46 | EXTEND(SP, 1); |
| 47 | |
| 48 | if (PL_op->op_private & OPpOFFBYONE) { |
| 49 | if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF; |
| 50 | } |
| 51 | else { |
| 52 | cxix = dopoptosub(cxstack_ix); |
| 53 | if (cxix < 0) |
| 54 | RETPUSHUNDEF; |
| 55 | cx = &cxstack[cxix]; |
| 56 | } |
| 57 | |
| 58 | switch (cx->blk_gimme) { |
| 59 | case G_ARRAY: |
| 60 | RETPUSHYES; |
| 61 | case G_SCALAR: |
| 62 | RETPUSHNO; |
| 63 | default: |
| 64 | RETPUSHUNDEF; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | PP(pp_regcreset) |
| 69 | { |
| 70 | TAINT_NOT; |
| 71 | return NORMAL; |
| 72 | } |
| 73 | |
| 74 | PP(pp_regcomp) |
| 75 | { |
| 76 | dSP; |
| 77 | PMOP *pm = (PMOP*)cLOGOP->op_other; |
| 78 | SV **args; |
| 79 | int nargs; |
| 80 | REGEXP *re = NULL; |
| 81 | REGEXP *new_re; |
| 82 | const regexp_engine *eng; |
| 83 | bool is_bare_re= FALSE; |
| 84 | |
| 85 | if (PL_op->op_flags & OPf_STACKED) { |
| 86 | dMARK; |
| 87 | nargs = SP - MARK; |
| 88 | args = ++MARK; |
| 89 | } |
| 90 | else { |
| 91 | nargs = 1; |
| 92 | args = SP; |
| 93 | } |
| 94 | |
| 95 | /* prevent recompiling under /o and ithreads. */ |
| 96 | #if defined(USE_ITHREADS) |
| 97 | if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) { |
| 98 | SP = args-1; |
| 99 | RETURN; |
| 100 | } |
| 101 | #endif |
| 102 | |
| 103 | re = PM_GETRE(pm); |
| 104 | assert (re != (REGEXP*) &PL_sv_undef); |
| 105 | eng = re ? RX_ENGINE(re) : current_re_engine(); |
| 106 | |
| 107 | new_re = (eng->op_comp |
| 108 | ? eng->op_comp |
| 109 | : &Perl_re_op_compile |
| 110 | )(aTHX_ args, nargs, pm->op_code_list, eng, re, |
| 111 | &is_bare_re, |
| 112 | (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK), |
| 113 | pm->op_pmflags | |
| 114 | (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0)); |
| 115 | |
| 116 | if (pm->op_pmflags & PMf_HAS_CV) |
| 117 | ReANY(new_re)->qr_anoncv |
| 118 | = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ)); |
| 119 | |
| 120 | if (is_bare_re) { |
| 121 | REGEXP *tmp; |
| 122 | /* The match's LHS's get-magic might need to access this op's regexp |
| 123 | (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call |
| 124 | get-magic now before we replace the regexp. Hopefully this hack can |
| 125 | be replaced with the approach described at |
| 126 | http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html |
| 127 | some day. */ |
| 128 | if (pm->op_type == OP_MATCH) { |
| 129 | SV *lhs; |
| 130 | const bool was_tainted = TAINT_get; |
| 131 | if (pm->op_flags & OPf_STACKED) |
| 132 | lhs = args[-1]; |
| 133 | else if (pm->op_targ) |
| 134 | lhs = PAD_SV(pm->op_targ); |
| 135 | else lhs = DEFSV; |
| 136 | SvGETMAGIC(lhs); |
| 137 | /* Restore the previous value of PL_tainted (which may have been |
| 138 | modified by get-magic), to avoid incorrectly setting the |
| 139 | RXf_TAINTED flag with RX_TAINT_on further down. */ |
| 140 | TAINT_set(was_tainted); |
| 141 | #ifdef NO_TAINT_SUPPORT |
| 142 | PERL_UNUSED_VAR(was_tainted); |
| 143 | #endif |
| 144 | } |
| 145 | tmp = reg_temp_copy(NULL, new_re); |
| 146 | ReREFCNT_dec(new_re); |
| 147 | new_re = tmp; |
| 148 | } |
| 149 | |
| 150 | if (re != new_re) { |
| 151 | ReREFCNT_dec(re); |
| 152 | PM_SETRE(pm, new_re); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | assert(TAINTING_get || !TAINT_get); |
| 157 | if (TAINT_get) { |
| 158 | SvTAINTED_on((SV*)new_re); |
| 159 | RX_TAINT_on(new_re); |
| 160 | } |
| 161 | |
| 162 | /* handle the empty pattern */ |
| 163 | if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm) { |
| 164 | if (PL_curpm == PL_reg_curpm) { |
| 165 | if (PL_curpm_under) { |
| 166 | if (PL_curpm_under == PL_reg_curpm) { |
| 167 | Perl_croak(aTHX_ "Infinite recursion via empty pattern"); |
| 168 | } else { |
| 169 | pm = PL_curpm_under; |
| 170 | } |
| 171 | } |
| 172 | } else { |
| 173 | pm = PL_curpm; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | #if !defined(USE_ITHREADS) |
| 178 | /* can't change the optree at runtime either */ |
| 179 | /* PMf_KEEP is handled differently under threads to avoid these problems */ |
| 180 | if (pm->op_pmflags & PMf_KEEP) { |
| 181 | cLOGOP->op_first->op_next = PL_op->op_next; |
| 182 | } |
| 183 | #endif |
| 184 | |
| 185 | SP = args-1; |
| 186 | RETURN; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | PP(pp_substcont) |
| 191 | { |
| 192 | dSP; |
| 193 | PERL_CONTEXT *cx = CX_CUR(); |
| 194 | PMOP * const pm = (PMOP*) cLOGOP->op_other; |
| 195 | SV * const dstr = cx->sb_dstr; |
| 196 | char *s = cx->sb_s; |
| 197 | char *m = cx->sb_m; |
| 198 | char *orig = cx->sb_orig; |
| 199 | REGEXP * const rx = cx->sb_rx; |
| 200 | SV *nsv = NULL; |
| 201 | REGEXP *old = PM_GETRE(pm); |
| 202 | |
| 203 | PERL_ASYNC_CHECK(); |
| 204 | |
| 205 | if(old != rx) { |
| 206 | if(old) |
| 207 | ReREFCNT_dec(old); |
| 208 | PM_SETRE(pm,ReREFCNT_inc(rx)); |
| 209 | } |
| 210 | |
| 211 | rxres_restore(&cx->sb_rxres, rx); |
| 212 | |
| 213 | if (cx->sb_iters++) { |
| 214 | const SSize_t saviters = cx->sb_iters; |
| 215 | if (cx->sb_iters > cx->sb_maxiters) |
| 216 | DIE(aTHX_ "Substitution loop"); |
| 217 | |
| 218 | SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */ |
| 219 | |
| 220 | /* See "how taint works" above pp_subst() */ |
| 221 | if (SvTAINTED(TOPs)) |
| 222 | cx->sb_rxtainted |= SUBST_TAINT_REPL; |
| 223 | sv_catsv_nomg(dstr, POPs); |
| 224 | if (CxONCE(cx) || s < orig || |
| 225 | !CALLREGEXEC(rx, s, cx->sb_strend, orig, |
| 226 | (s == m), cx->sb_targ, NULL, |
| 227 | (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW))) |
| 228 | { |
| 229 | SV *targ = cx->sb_targ; |
| 230 | |
| 231 | assert(cx->sb_strend >= s); |
| 232 | if(cx->sb_strend > s) { |
| 233 | if (DO_UTF8(dstr) && !SvUTF8(targ)) |
| 234 | sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv); |
| 235 | else |
| 236 | sv_catpvn_nomg(dstr, s, cx->sb_strend - s); |
| 237 | } |
| 238 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 239 | cx->sb_rxtainted |= SUBST_TAINT_PAT; |
| 240 | |
| 241 | if (pm->op_pmflags & PMf_NONDESTRUCT) { |
| 242 | PUSHs(dstr); |
| 243 | /* From here on down we're using the copy, and leaving the |
| 244 | original untouched. */ |
| 245 | targ = dstr; |
| 246 | } |
| 247 | else { |
| 248 | SV_CHECK_THINKFIRST_COW_DROP(targ); |
| 249 | if (isGV(targ)) Perl_croak_no_modify(); |
| 250 | SvPV_free(targ); |
| 251 | SvPV_set(targ, SvPVX(dstr)); |
| 252 | SvCUR_set(targ, SvCUR(dstr)); |
| 253 | SvLEN_set(targ, SvLEN(dstr)); |
| 254 | if (DO_UTF8(dstr)) |
| 255 | SvUTF8_on(targ); |
| 256 | SvPV_set(dstr, NULL); |
| 257 | |
| 258 | PL_tainted = 0; |
| 259 | mPUSHi(saviters - 1); |
| 260 | |
| 261 | (void)SvPOK_only_UTF8(targ); |
| 262 | } |
| 263 | |
| 264 | /* update the taint state of various various variables in |
| 265 | * preparation for final exit. |
| 266 | * See "how taint works" above pp_subst() */ |
| 267 | if (TAINTING_get) { |
| 268 | if ((cx->sb_rxtainted & SUBST_TAINT_PAT) || |
| 269 | ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) |
| 270 | == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) |
| 271 | ) |
| 272 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ |
| 273 | |
| 274 | if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET) |
| 275 | && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) |
| 276 | ) |
| 277 | SvTAINTED_on(TOPs); /* taint return value */ |
| 278 | /* needed for mg_set below */ |
| 279 | TAINT_set( |
| 280 | cBOOL(cx->sb_rxtainted & |
| 281 | (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) |
| 282 | ); |
| 283 | SvTAINT(TARG); |
| 284 | } |
| 285 | /* PL_tainted must be correctly set for this mg_set */ |
| 286 | SvSETMAGIC(TARG); |
| 287 | TAINT_NOT; |
| 288 | |
| 289 | CX_LEAVE_SCOPE(cx); |
| 290 | CX_POPSUBST(cx); |
| 291 | CX_POP(cx); |
| 292 | |
| 293 | PERL_ASYNC_CHECK(); |
| 294 | RETURNOP(pm->op_next); |
| 295 | NOT_REACHED; /* NOTREACHED */ |
| 296 | } |
| 297 | cx->sb_iters = saviters; |
| 298 | } |
| 299 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
| 300 | m = s; |
| 301 | s = orig; |
| 302 | assert(!RX_SUBOFFSET(rx)); |
| 303 | cx->sb_orig = orig = RX_SUBBEG(rx); |
| 304 | s = orig + (m - s); |
| 305 | cx->sb_strend = s + (cx->sb_strend - m); |
| 306 | } |
| 307 | cx->sb_m = m = RX_OFFS(rx)[0].start + orig; |
| 308 | if (m > s) { |
| 309 | if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ)) |
| 310 | sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv); |
| 311 | else |
| 312 | sv_catpvn_nomg(dstr, s, m-s); |
| 313 | } |
| 314 | cx->sb_s = RX_OFFS(rx)[0].end + orig; |
| 315 | { /* Update the pos() information. */ |
| 316 | SV * const sv |
| 317 | = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ; |
| 318 | MAGIC *mg; |
| 319 | |
| 320 | /* the string being matched against may no longer be a string, |
| 321 | * e.g. $_=0; s/.../$_++/ge */ |
| 322 | |
| 323 | if (!SvPOK(sv)) |
| 324 | SvPV_force_nomg_nolen(sv); |
| 325 | |
| 326 | if (!(mg = mg_find_mglob(sv))) { |
| 327 | mg = sv_magicext_mglob(sv); |
| 328 | } |
| 329 | MgBYTEPOS_set(mg, sv, SvPVX(sv), m - orig); |
| 330 | } |
| 331 | if (old != rx) |
| 332 | (void)ReREFCNT_inc(rx); |
| 333 | /* update the taint state of various various variables in preparation |
| 334 | * for calling the code block. |
| 335 | * See "how taint works" above pp_subst() */ |
| 336 | if (TAINTING_get) { |
| 337 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 338 | cx->sb_rxtainted |= SUBST_TAINT_PAT; |
| 339 | |
| 340 | if ((cx->sb_rxtainted & SUBST_TAINT_PAT) || |
| 341 | ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) |
| 342 | == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) |
| 343 | ) |
| 344 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ |
| 345 | |
| 346 | if (cx->sb_iters > 1 && (cx->sb_rxtainted & |
| 347 | (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))) |
| 348 | SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT) |
| 349 | ? cx->sb_dstr : cx->sb_targ); |
| 350 | TAINT_NOT; |
| 351 | } |
| 352 | rxres_save(&cx->sb_rxres, rx); |
| 353 | PL_curpm = pm; |
| 354 | RETURNOP(pm->op_pmstashstartu.op_pmreplstart); |
| 355 | } |
| 356 | |
| 357 | void |
| 358 | Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx) |
| 359 | { |
| 360 | UV *p = (UV*)*rsp; |
| 361 | U32 i; |
| 362 | |
| 363 | PERL_ARGS_ASSERT_RXRES_SAVE; |
| 364 | PERL_UNUSED_CONTEXT; |
| 365 | |
| 366 | if (!p || p[1] < RX_NPARENS(rx)) { |
| 367 | #ifdef PERL_ANY_COW |
| 368 | i = 7 + (RX_NPARENS(rx)+1) * 2; |
| 369 | #else |
| 370 | i = 6 + (RX_NPARENS(rx)+1) * 2; |
| 371 | #endif |
| 372 | if (!p) |
| 373 | Newx(p, i, UV); |
| 374 | else |
| 375 | Renew(p, i, UV); |
| 376 | *rsp = (void*)p; |
| 377 | } |
| 378 | |
| 379 | /* what (if anything) to free on croak */ |
| 380 | *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL); |
| 381 | RX_MATCH_COPIED_off(rx); |
| 382 | *p++ = RX_NPARENS(rx); |
| 383 | |
| 384 | #ifdef PERL_ANY_COW |
| 385 | *p++ = PTR2UV(RX_SAVED_COPY(rx)); |
| 386 | RX_SAVED_COPY(rx) = NULL; |
| 387 | #endif |
| 388 | |
| 389 | *p++ = PTR2UV(RX_SUBBEG(rx)); |
| 390 | *p++ = (UV)RX_SUBLEN(rx); |
| 391 | *p++ = (UV)RX_SUBOFFSET(rx); |
| 392 | *p++ = (UV)RX_SUBCOFFSET(rx); |
| 393 | for (i = 0; i <= RX_NPARENS(rx); ++i) { |
| 394 | *p++ = (UV)RX_OFFS(rx)[i].start; |
| 395 | *p++ = (UV)RX_OFFS(rx)[i].end; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | static void |
| 400 | S_rxres_restore(pTHX_ void **rsp, REGEXP *rx) |
| 401 | { |
| 402 | UV *p = (UV*)*rsp; |
| 403 | U32 i; |
| 404 | |
| 405 | PERL_ARGS_ASSERT_RXRES_RESTORE; |
| 406 | PERL_UNUSED_CONTEXT; |
| 407 | |
| 408 | RX_MATCH_COPY_FREE(rx); |
| 409 | RX_MATCH_COPIED_set(rx, *p); |
| 410 | *p++ = 0; |
| 411 | RX_NPARENS(rx) = *p++; |
| 412 | |
| 413 | #ifdef PERL_ANY_COW |
| 414 | if (RX_SAVED_COPY(rx)) |
| 415 | SvREFCNT_dec (RX_SAVED_COPY(rx)); |
| 416 | RX_SAVED_COPY(rx) = INT2PTR(SV*,*p); |
| 417 | *p++ = 0; |
| 418 | #endif |
| 419 | |
| 420 | RX_SUBBEG(rx) = INT2PTR(char*,*p++); |
| 421 | RX_SUBLEN(rx) = (I32)(*p++); |
| 422 | RX_SUBOFFSET(rx) = (I32)*p++; |
| 423 | RX_SUBCOFFSET(rx) = (I32)*p++; |
| 424 | for (i = 0; i <= RX_NPARENS(rx); ++i) { |
| 425 | RX_OFFS(rx)[i].start = (I32)(*p++); |
| 426 | RX_OFFS(rx)[i].end = (I32)(*p++); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | static void |
| 431 | S_rxres_free(pTHX_ void **rsp) |
| 432 | { |
| 433 | UV * const p = (UV*)*rsp; |
| 434 | |
| 435 | PERL_ARGS_ASSERT_RXRES_FREE; |
| 436 | PERL_UNUSED_CONTEXT; |
| 437 | |
| 438 | if (p) { |
| 439 | void *tmp = INT2PTR(char*,*p); |
| 440 | #ifdef PERL_POISON |
| 441 | #ifdef PERL_ANY_COW |
| 442 | U32 i = 9 + p[1] * 2; |
| 443 | #else |
| 444 | U32 i = 8 + p[1] * 2; |
| 445 | #endif |
| 446 | #endif |
| 447 | |
| 448 | #ifdef PERL_ANY_COW |
| 449 | SvREFCNT_dec (INT2PTR(SV*,p[2])); |
| 450 | #endif |
| 451 | #ifdef PERL_POISON |
| 452 | PoisonFree(p, i, sizeof(UV)); |
| 453 | #endif |
| 454 | |
| 455 | Safefree(tmp); |
| 456 | Safefree(p); |
| 457 | *rsp = NULL; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | #define FORM_NUM_BLANK (1<<30) |
| 462 | #define FORM_NUM_POINT (1<<29) |
| 463 | |
| 464 | PP(pp_formline) |
| 465 | { |
| 466 | dSP; dMARK; dORIGMARK; |
| 467 | SV * const tmpForm = *++MARK; |
| 468 | SV *formsv; /* contains text of original format */ |
| 469 | U32 *fpc; /* format ops program counter */ |
| 470 | char *t; /* current append position in target string */ |
| 471 | const char *f; /* current position in format string */ |
| 472 | I32 arg; |
| 473 | SV *sv = NULL; /* current item */ |
| 474 | const char *item = NULL;/* string value of current item */ |
| 475 | I32 itemsize = 0; /* length (chars) of item, possibly truncated */ |
| 476 | I32 itembytes = 0; /* as itemsize, but length in bytes */ |
| 477 | I32 fieldsize = 0; /* width of current field */ |
| 478 | I32 lines = 0; /* number of lines that have been output */ |
| 479 | bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */ |
| 480 | const char *chophere = NULL; /* where to chop current item */ |
| 481 | STRLEN linemark = 0; /* pos of start of line in output */ |
| 482 | NV value; |
| 483 | bool gotsome = FALSE; /* seen at least one non-blank item on this line */ |
| 484 | STRLEN len; /* length of current sv */ |
| 485 | STRLEN linemax; /* estimate of output size in bytes */ |
| 486 | bool item_is_utf8 = FALSE; |
| 487 | bool targ_is_utf8 = FALSE; |
| 488 | const char *fmt; |
| 489 | MAGIC *mg = NULL; |
| 490 | U8 *source; /* source of bytes to append */ |
| 491 | STRLEN to_copy; /* how may bytes to append */ |
| 492 | char trans; /* what chars to translate */ |
| 493 | bool copied_form = FALSE; /* have we duplicated the form? */ |
| 494 | |
| 495 | mg = doparseform(tmpForm); |
| 496 | |
| 497 | fpc = (U32*)mg->mg_ptr; |
| 498 | /* the actual string the format was compiled from. |
| 499 | * with overload etc, this may not match tmpForm */ |
| 500 | formsv = mg->mg_obj; |
| 501 | |
| 502 | |
| 503 | SvPV_force(PL_formtarget, len); |
| 504 | if (SvTAINTED(tmpForm) || SvTAINTED(formsv)) |
| 505 | SvTAINTED_on(PL_formtarget); |
| 506 | if (DO_UTF8(PL_formtarget)) |
| 507 | targ_is_utf8 = TRUE; |
| 508 | /* this is an initial estimate of how much output buffer space |
| 509 | * to allocate. It may be exceeded later */ |
| 510 | linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1); |
| 511 | t = SvGROW(PL_formtarget, len + linemax + 1); |
| 512 | /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */ |
| 513 | t += len; |
| 514 | f = SvPV_const(formsv, len); |
| 515 | |
| 516 | for (;;) { |
| 517 | DEBUG_f( { |
| 518 | const char *name = "???"; |
| 519 | arg = -1; |
| 520 | switch (*fpc) { |
| 521 | case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break; |
| 522 | case FF_BLANK: arg = fpc[1]; name = "BLANK"; break; |
| 523 | case FF_SKIP: arg = fpc[1]; name = "SKIP"; break; |
| 524 | case FF_FETCH: arg = fpc[1]; name = "FETCH"; break; |
| 525 | case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break; |
| 526 | |
| 527 | case FF_CHECKNL: name = "CHECKNL"; break; |
| 528 | case FF_CHECKCHOP: name = "CHECKCHOP"; break; |
| 529 | case FF_SPACE: name = "SPACE"; break; |
| 530 | case FF_HALFSPACE: name = "HALFSPACE"; break; |
| 531 | case FF_ITEM: name = "ITEM"; break; |
| 532 | case FF_CHOP: name = "CHOP"; break; |
| 533 | case FF_LINEGLOB: name = "LINEGLOB"; break; |
| 534 | case FF_NEWLINE: name = "NEWLINE"; break; |
| 535 | case FF_MORE: name = "MORE"; break; |
| 536 | case FF_LINEMARK: name = "LINEMARK"; break; |
| 537 | case FF_END: name = "END"; break; |
| 538 | case FF_0DECIMAL: name = "0DECIMAL"; break; |
| 539 | case FF_LINESNGL: name = "LINESNGL"; break; |
| 540 | } |
| 541 | if (arg >= 0) |
| 542 | PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg); |
| 543 | else |
| 544 | PerlIO_printf(Perl_debug_log, "%-16s\n", name); |
| 545 | } ); |
| 546 | switch (*fpc++) { |
| 547 | case FF_LINEMARK: /* start (or end) of a line */ |
| 548 | linemark = t - SvPVX(PL_formtarget); |
| 549 | lines++; |
| 550 | gotsome = FALSE; |
| 551 | break; |
| 552 | |
| 553 | case FF_LITERAL: /* append <arg> literal chars */ |
| 554 | to_copy = *fpc++; |
| 555 | source = (U8 *)f; |
| 556 | f += to_copy; |
| 557 | trans = '~'; |
| 558 | item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv); |
| 559 | goto append; |
| 560 | |
| 561 | case FF_SKIP: /* skip <arg> chars in format */ |
| 562 | f += *fpc++; |
| 563 | break; |
| 564 | |
| 565 | case FF_FETCH: /* get next item and set field size to <arg> */ |
| 566 | arg = *fpc++; |
| 567 | f += arg; |
| 568 | fieldsize = arg; |
| 569 | |
| 570 | if (MARK < SP) |
| 571 | sv = *++MARK; |
| 572 | else { |
| 573 | sv = &PL_sv_no; |
| 574 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments"); |
| 575 | } |
| 576 | if (SvTAINTED(sv)) |
| 577 | SvTAINTED_on(PL_formtarget); |
| 578 | break; |
| 579 | |
| 580 | case FF_CHECKNL: /* find max len of item (up to \n) that fits field */ |
| 581 | { |
| 582 | const char *s = item = SvPV_const(sv, len); |
| 583 | const char *send = s + len; |
| 584 | |
| 585 | itemsize = 0; |
| 586 | item_is_utf8 = DO_UTF8(sv); |
| 587 | while (s < send) { |
| 588 | if (!isCNTRL(*s)) |
| 589 | gotsome = TRUE; |
| 590 | else if (*s == '\n') |
| 591 | break; |
| 592 | |
| 593 | if (item_is_utf8) |
| 594 | s += UTF8SKIP(s); |
| 595 | else |
| 596 | s++; |
| 597 | itemsize++; |
| 598 | if (itemsize == fieldsize) |
| 599 | break; |
| 600 | } |
| 601 | itembytes = s - item; |
| 602 | chophere = s; |
| 603 | break; |
| 604 | } |
| 605 | |
| 606 | case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */ |
| 607 | { |
| 608 | const char *s = item = SvPV_const(sv, len); |
| 609 | const char *send = s + len; |
| 610 | I32 size = 0; |
| 611 | |
| 612 | chophere = NULL; |
| 613 | item_is_utf8 = DO_UTF8(sv); |
| 614 | while (s < send) { |
| 615 | /* look for a legal split position */ |
| 616 | if (isSPACE(*s)) { |
| 617 | if (*s == '\r') { |
| 618 | chophere = s; |
| 619 | itemsize = size; |
| 620 | break; |
| 621 | } |
| 622 | if (chopspace) { |
| 623 | /* provisional split point */ |
| 624 | chophere = s; |
| 625 | itemsize = size; |
| 626 | } |
| 627 | /* we delay testing fieldsize until after we've |
| 628 | * processed the possible split char directly |
| 629 | * following the last field char; so if fieldsize=3 |
| 630 | * and item="a b cdef", we consume "a b", not "a". |
| 631 | * Ditto further down. |
| 632 | */ |
| 633 | if (size == fieldsize) |
| 634 | break; |
| 635 | } |
| 636 | else { |
| 637 | if (strchr(PL_chopset, *s)) { |
| 638 | /* provisional split point */ |
| 639 | /* for a non-space split char, we include |
| 640 | * the split char; hence the '+1' */ |
| 641 | chophere = s + 1; |
| 642 | itemsize = size; |
| 643 | } |
| 644 | if (size == fieldsize) |
| 645 | break; |
| 646 | if (!isCNTRL(*s)) |
| 647 | gotsome = TRUE; |
| 648 | } |
| 649 | |
| 650 | if (item_is_utf8) |
| 651 | s += UTF8SKIP(s); |
| 652 | else |
| 653 | s++; |
| 654 | size++; |
| 655 | } |
| 656 | if (!chophere || s == send) { |
| 657 | chophere = s; |
| 658 | itemsize = size; |
| 659 | } |
| 660 | itembytes = chophere - item; |
| 661 | |
| 662 | break; |
| 663 | } |
| 664 | |
| 665 | case FF_SPACE: /* append padding space (diff of field, item size) */ |
| 666 | arg = fieldsize - itemsize; |
| 667 | if (arg) { |
| 668 | fieldsize -= arg; |
| 669 | while (arg-- > 0) |
| 670 | *t++ = ' '; |
| 671 | } |
| 672 | break; |
| 673 | |
| 674 | case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */ |
| 675 | arg = fieldsize - itemsize; |
| 676 | if (arg) { |
| 677 | arg /= 2; |
| 678 | fieldsize -= arg; |
| 679 | while (arg-- > 0) |
| 680 | *t++ = ' '; |
| 681 | } |
| 682 | break; |
| 683 | |
| 684 | case FF_ITEM: /* append a text item, while blanking ctrl chars */ |
| 685 | to_copy = itembytes; |
| 686 | source = (U8 *)item; |
| 687 | trans = 1; |
| 688 | goto append; |
| 689 | |
| 690 | case FF_CHOP: /* (for ^*) chop the current item */ |
| 691 | if (sv != &PL_sv_no) { |
| 692 | const char *s = chophere; |
| 693 | if (!copied_form && |
| 694 | ((sv == tmpForm || SvSMAGICAL(sv)) |
| 695 | || (SvGMAGICAL(tmpForm) && !sv_only_taint_gmagic(tmpForm))) ) { |
| 696 | /* sv and tmpForm are either the same SV, or magic might allow modification |
| 697 | of tmpForm when sv is modified, so copy */ |
| 698 | SV *newformsv = sv_mortalcopy(formsv); |
| 699 | U32 *new_compiled; |
| 700 | |
| 701 | f = SvPV_nolen(newformsv) + (f - SvPV_nolen(formsv)); |
| 702 | Newx(new_compiled, mg->mg_len / sizeof(U32), U32); |
| 703 | memcpy(new_compiled, mg->mg_ptr, mg->mg_len); |
| 704 | SAVEFREEPV(new_compiled); |
| 705 | fpc = new_compiled + (fpc - (U32*)mg->mg_ptr); |
| 706 | formsv = newformsv; |
| 707 | |
| 708 | copied_form = TRUE; |
| 709 | } |
| 710 | if (chopspace) { |
| 711 | while (isSPACE(*s)) |
| 712 | s++; |
| 713 | } |
| 714 | if (SvPOKp(sv)) |
| 715 | sv_chop(sv,s); |
| 716 | else |
| 717 | /* tied, overloaded or similar strangeness. |
| 718 | * Do it the hard way */ |
| 719 | sv_setpvn(sv, s, len - (s-item)); |
| 720 | SvSETMAGIC(sv); |
| 721 | break; |
| 722 | } |
| 723 | |
| 724 | case FF_LINESNGL: /* process ^* */ |
| 725 | chopspace = 0; |
| 726 | /* FALLTHROUGH */ |
| 727 | |
| 728 | case FF_LINEGLOB: /* process @* */ |
| 729 | { |
| 730 | const bool oneline = fpc[-1] == FF_LINESNGL; |
| 731 | const char *s = item = SvPV_const(sv, len); |
| 732 | const char *const send = s + len; |
| 733 | |
| 734 | item_is_utf8 = DO_UTF8(sv); |
| 735 | chophere = s + len; |
| 736 | if (!len) |
| 737 | break; |
| 738 | trans = 0; |
| 739 | gotsome = TRUE; |
| 740 | source = (U8 *) s; |
| 741 | to_copy = len; |
| 742 | while (s < send) { |
| 743 | if (*s++ == '\n') { |
| 744 | if (oneline) { |
| 745 | to_copy = s - item - 1; |
| 746 | chophere = s; |
| 747 | break; |
| 748 | } else { |
| 749 | if (s == send) { |
| 750 | to_copy--; |
| 751 | } else |
| 752 | lines++; |
| 753 | } |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | append: |
| 759 | /* append to_copy bytes from source to PL_formstring. |
| 760 | * item_is_utf8 implies source is utf8. |
| 761 | * if trans, translate certain characters during the copy */ |
| 762 | { |
| 763 | U8 *tmp = NULL; |
| 764 | STRLEN grow = 0; |
| 765 | |
| 766 | SvCUR_set(PL_formtarget, |
| 767 | t - SvPVX_const(PL_formtarget)); |
| 768 | |
| 769 | if (targ_is_utf8 && !item_is_utf8) { |
| 770 | source = tmp = bytes_to_utf8(source, &to_copy); |
| 771 | grow = to_copy; |
| 772 | } else { |
| 773 | if (item_is_utf8 && !targ_is_utf8) { |
| 774 | U8 *s; |
| 775 | /* Upgrade targ to UTF8, and then we reduce it to |
| 776 | a problem we have a simple solution for. |
| 777 | Don't need get magic. */ |
| 778 | sv_utf8_upgrade_nomg(PL_formtarget); |
| 779 | targ_is_utf8 = TRUE; |
| 780 | /* re-calculate linemark */ |
| 781 | s = (U8*)SvPVX(PL_formtarget); |
| 782 | /* the bytes we initially allocated to append the |
| 783 | * whole line may have been gobbled up during the |
| 784 | * upgrade, so allocate a whole new line's worth |
| 785 | * for safety */ |
| 786 | grow = linemax; |
| 787 | while (linemark--) |
| 788 | s += UTF8SKIP(s); |
| 789 | linemark = s - (U8*)SvPVX(PL_formtarget); |
| 790 | } |
| 791 | /* Easy. They agree. */ |
| 792 | assert (item_is_utf8 == targ_is_utf8); |
| 793 | } |
| 794 | if (!trans) |
| 795 | /* @* and ^* are the only things that can exceed |
| 796 | * the linemax, so grow by the output size, plus |
| 797 | * a whole new form's worth in case of any further |
| 798 | * output */ |
| 799 | grow = linemax + to_copy; |
| 800 | if (grow) |
| 801 | SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1); |
| 802 | t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget); |
| 803 | |
| 804 | Copy(source, t, to_copy, char); |
| 805 | if (trans) { |
| 806 | /* blank out ~ or control chars, depending on trans. |
| 807 | * works on bytes not chars, so relies on not |
| 808 | * matching utf8 continuation bytes */ |
| 809 | U8 *s = (U8*)t; |
| 810 | U8 *send = s + to_copy; |
| 811 | while (s < send) { |
| 812 | const int ch = *s; |
| 813 | if (trans == '~' ? (ch == '~') : isCNTRL(ch)) |
| 814 | *s = ' '; |
| 815 | s++; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | t += to_copy; |
| 820 | SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy); |
| 821 | if (tmp) |
| 822 | Safefree(tmp); |
| 823 | break; |
| 824 | } |
| 825 | |
| 826 | case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */ |
| 827 | arg = *fpc++; |
| 828 | fmt = (const char *) |
| 829 | ((arg & FORM_NUM_POINT) ? "%#0*.*" NVff : "%0*.*" NVff); |
| 830 | goto ff_dec; |
| 831 | |
| 832 | case FF_DECIMAL: /* do @##, ^##, where <arg>=(precision|flags) */ |
| 833 | arg = *fpc++; |
| 834 | fmt = (const char *) |
| 835 | ((arg & FORM_NUM_POINT) ? "%#*.*" NVff : "%*.*" NVff); |
| 836 | ff_dec: |
| 837 | /* If the field is marked with ^ and the value is undefined, |
| 838 | blank it out. */ |
| 839 | if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) { |
| 840 | arg = fieldsize; |
| 841 | while (arg--) |
| 842 | *t++ = ' '; |
| 843 | break; |
| 844 | } |
| 845 | gotsome = TRUE; |
| 846 | value = SvNV(sv); |
| 847 | /* overflow evidence */ |
| 848 | if (num_overflow(value, fieldsize, arg)) { |
| 849 | arg = fieldsize; |
| 850 | while (arg--) |
| 851 | *t++ = '#'; |
| 852 | break; |
| 853 | } |
| 854 | /* Formats aren't yet marked for locales, so assume "yes". */ |
| 855 | { |
| 856 | Size_t max = SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)); |
| 857 | int len; |
| 858 | DECLARATION_FOR_LC_NUMERIC_MANIPULATION; |
| 859 | STORE_LC_NUMERIC_SET_TO_NEEDED(); |
| 860 | arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK); |
| 861 | #ifdef USE_QUADMATH |
| 862 | { |
| 863 | const char* qfmt = quadmath_format_single(fmt); |
| 864 | int len; |
| 865 | if (!qfmt) |
| 866 | Perl_croak_nocontext("panic: quadmath invalid format \"%s\"", fmt); |
| 867 | len = quadmath_snprintf(t, max, qfmt, (int) fieldsize, (int) arg, value); |
| 868 | if (len == -1) |
| 869 | Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt); |
| 870 | if (qfmt != fmt) |
| 871 | Safefree(fmt); |
| 872 | } |
| 873 | #else |
| 874 | /* we generate fmt ourselves so it is safe */ |
| 875 | GCC_DIAG_IGNORE(-Wformat-nonliteral); |
| 876 | len = my_snprintf(t, max, fmt, (int) fieldsize, (int) arg, value); |
| 877 | GCC_DIAG_RESTORE; |
| 878 | #endif |
| 879 | PERL_MY_SNPRINTF_POST_GUARD(len, max); |
| 880 | RESTORE_LC_NUMERIC(); |
| 881 | } |
| 882 | t += fieldsize; |
| 883 | break; |
| 884 | |
| 885 | case FF_NEWLINE: /* delete trailing spaces, then append \n */ |
| 886 | f++; |
| 887 | while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ; |
| 888 | t++; |
| 889 | *t++ = '\n'; |
| 890 | break; |
| 891 | |
| 892 | case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */ |
| 893 | arg = *fpc++; |
| 894 | if (gotsome) { |
| 895 | if (arg) { /* repeat until fields exhausted? */ |
| 896 | fpc--; |
| 897 | goto end; |
| 898 | } |
| 899 | } |
| 900 | else { |
| 901 | t = SvPVX(PL_formtarget) + linemark; |
| 902 | lines--; |
| 903 | } |
| 904 | break; |
| 905 | |
| 906 | case FF_MORE: /* replace long end of string with '...' */ |
| 907 | { |
| 908 | const char *s = chophere; |
| 909 | const char *send = item + len; |
| 910 | if (chopspace) { |
| 911 | while (isSPACE(*s) && (s < send)) |
| 912 | s++; |
| 913 | } |
| 914 | if (s < send) { |
| 915 | char *s1; |
| 916 | arg = fieldsize - itemsize; |
| 917 | if (arg) { |
| 918 | fieldsize -= arg; |
| 919 | while (arg-- > 0) |
| 920 | *t++ = ' '; |
| 921 | } |
| 922 | s1 = t - 3; |
| 923 | if (strnEQ(s1," ",3)) { |
| 924 | while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1])) |
| 925 | s1--; |
| 926 | } |
| 927 | *s1++ = '.'; |
| 928 | *s1++ = '.'; |
| 929 | *s1++ = '.'; |
| 930 | } |
| 931 | break; |
| 932 | } |
| 933 | |
| 934 | case FF_END: /* tidy up, then return */ |
| 935 | end: |
| 936 | assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget)); |
| 937 | *t = '\0'; |
| 938 | SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget)); |
| 939 | if (targ_is_utf8) |
| 940 | SvUTF8_on(PL_formtarget); |
| 941 | FmLINES(PL_formtarget) += lines; |
| 942 | SP = ORIGMARK; |
| 943 | if (fpc[-1] == FF_BLANK) |
| 944 | RETURNOP(cLISTOP->op_first); |
| 945 | else |
| 946 | RETPUSHYES; |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | /* also used for: pp_mapstart() */ |
| 952 | PP(pp_grepstart) |
| 953 | { |
| 954 | dSP; |
| 955 | SV *src; |
| 956 | |
| 957 | if (PL_stack_base + TOPMARK == SP) { |
| 958 | (void)POPMARK; |
| 959 | if (GIMME_V == G_SCALAR) |
| 960 | mXPUSHi(0); |
| 961 | RETURNOP(PL_op->op_next->op_next); |
| 962 | } |
| 963 | PL_stack_sp = PL_stack_base + TOPMARK + 1; |
| 964 | Perl_pp_pushmark(aTHX); /* push dst */ |
| 965 | Perl_pp_pushmark(aTHX); /* push src */ |
| 966 | ENTER_with_name("grep"); /* enter outer scope */ |
| 967 | |
| 968 | SAVETMPS; |
| 969 | SAVE_DEFSV; |
| 970 | ENTER_with_name("grep_item"); /* enter inner scope */ |
| 971 | SAVEVPTR(PL_curpm); |
| 972 | |
| 973 | src = PL_stack_base[TOPMARK]; |
| 974 | if (SvPADTMP(src)) { |
| 975 | src = PL_stack_base[TOPMARK] = sv_mortalcopy(src); |
| 976 | PL_tmps_floor++; |
| 977 | } |
| 978 | SvTEMP_off(src); |
| 979 | DEFSV_set(src); |
| 980 | |
| 981 | PUTBACK; |
| 982 | if (PL_op->op_type == OP_MAPSTART) |
| 983 | Perl_pp_pushmark(aTHX); /* push top */ |
| 984 | return ((LOGOP*)PL_op->op_next)->op_other; |
| 985 | } |
| 986 | |
| 987 | PP(pp_mapwhile) |
| 988 | { |
| 989 | dSP; |
| 990 | const U8 gimme = GIMME_V; |
| 991 | I32 items = (SP - PL_stack_base) - TOPMARK; /* how many new items */ |
| 992 | I32 count; |
| 993 | I32 shift; |
| 994 | SV** src; |
| 995 | SV** dst; |
| 996 | |
| 997 | /* first, move source pointer to the next item in the source list */ |
| 998 | ++PL_markstack_ptr[-1]; |
| 999 | |
| 1000 | /* if there are new items, push them into the destination list */ |
| 1001 | if (items && gimme != G_VOID) { |
| 1002 | /* might need to make room back there first */ |
| 1003 | if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) { |
| 1004 | /* XXX this implementation is very pessimal because the stack |
| 1005 | * is repeatedly extended for every set of items. Is possible |
| 1006 | * to do this without any stack extension or copying at all |
| 1007 | * by maintaining a separate list over which the map iterates |
| 1008 | * (like foreach does). --gsar */ |
| 1009 | |
| 1010 | /* everything in the stack after the destination list moves |
| 1011 | * towards the end the stack by the amount of room needed */ |
| 1012 | shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]); |
| 1013 | |
| 1014 | /* items to shift up (accounting for the moved source pointer) */ |
| 1015 | count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1); |
| 1016 | |
| 1017 | /* This optimization is by Ben Tilly and it does |
| 1018 | * things differently from what Sarathy (gsar) |
| 1019 | * is describing. The downside of this optimization is |
| 1020 | * that leaves "holes" (uninitialized and hopefully unused areas) |
| 1021 | * to the Perl stack, but on the other hand this |
| 1022 | * shouldn't be a problem. If Sarathy's idea gets |
| 1023 | * implemented, this optimization should become |
| 1024 | * irrelevant. --jhi */ |
| 1025 | if (shift < count) |
| 1026 | shift = count; /* Avoid shifting too often --Ben Tilly */ |
| 1027 | |
| 1028 | EXTEND(SP,shift); |
| 1029 | src = SP; |
| 1030 | dst = (SP += shift); |
| 1031 | PL_markstack_ptr[-1] += shift; |
| 1032 | *PL_markstack_ptr += shift; |
| 1033 | while (count--) |
| 1034 | *dst-- = *src--; |
| 1035 | } |
| 1036 | /* copy the new items down to the destination list */ |
| 1037 | dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1; |
| 1038 | if (gimme == G_ARRAY) { |
| 1039 | /* add returned items to the collection (making mortal copies |
| 1040 | * if necessary), then clear the current temps stack frame |
| 1041 | * *except* for those items. We do this splicing the items |
| 1042 | * into the start of the tmps frame (so some items may be on |
| 1043 | * the tmps stack twice), then moving PL_tmps_floor above |
| 1044 | * them, then freeing the frame. That way, the only tmps that |
| 1045 | * accumulate over iterations are the return values for map. |
| 1046 | * We have to do to this way so that everything gets correctly |
| 1047 | * freed if we die during the map. |
| 1048 | */ |
| 1049 | I32 tmpsbase; |
| 1050 | I32 i = items; |
| 1051 | /* make space for the slice */ |
| 1052 | EXTEND_MORTAL(items); |
| 1053 | tmpsbase = PL_tmps_floor + 1; |
| 1054 | Move(PL_tmps_stack + tmpsbase, |
| 1055 | PL_tmps_stack + tmpsbase + items, |
| 1056 | PL_tmps_ix - PL_tmps_floor, |
| 1057 | SV*); |
| 1058 | PL_tmps_ix += items; |
| 1059 | |
| 1060 | while (i-- > 0) { |
| 1061 | SV *sv = POPs; |
| 1062 | if (!SvTEMP(sv)) |
| 1063 | sv = sv_mortalcopy(sv); |
| 1064 | *dst-- = sv; |
| 1065 | PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv); |
| 1066 | } |
| 1067 | /* clear the stack frame except for the items */ |
| 1068 | PL_tmps_floor += items; |
| 1069 | FREETMPS; |
| 1070 | /* FREETMPS may have cleared the TEMP flag on some of the items */ |
| 1071 | i = items; |
| 1072 | while (i-- > 0) |
| 1073 | SvTEMP_on(PL_tmps_stack[--tmpsbase]); |
| 1074 | } |
| 1075 | else { |
| 1076 | /* scalar context: we don't care about which values map returns |
| 1077 | * (we use undef here). And so we certainly don't want to do mortal |
| 1078 | * copies of meaningless values. */ |
| 1079 | while (items-- > 0) { |
| 1080 | (void)POPs; |
| 1081 | *dst-- = &PL_sv_undef; |
| 1082 | } |
| 1083 | FREETMPS; |
| 1084 | } |
| 1085 | } |
| 1086 | else { |
| 1087 | FREETMPS; |
| 1088 | } |
| 1089 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
| 1090 | |
| 1091 | /* All done yet? */ |
| 1092 | if (PL_markstack_ptr[-1] > TOPMARK) { |
| 1093 | |
| 1094 | (void)POPMARK; /* pop top */ |
| 1095 | LEAVE_with_name("grep"); /* exit outer scope */ |
| 1096 | (void)POPMARK; /* pop src */ |
| 1097 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
| 1098 | (void)POPMARK; /* pop dst */ |
| 1099 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 1100 | if (gimme == G_SCALAR) { |
| 1101 | dTARGET; |
| 1102 | XPUSHi(items); |
| 1103 | } |
| 1104 | else if (gimme == G_ARRAY) |
| 1105 | SP += items; |
| 1106 | RETURN; |
| 1107 | } |
| 1108 | else { |
| 1109 | SV *src; |
| 1110 | |
| 1111 | ENTER_with_name("grep_item"); /* enter inner scope */ |
| 1112 | SAVEVPTR(PL_curpm); |
| 1113 | |
| 1114 | /* set $_ to the new source item */ |
| 1115 | src = PL_stack_base[PL_markstack_ptr[-1]]; |
| 1116 | if (SvPADTMP(src)) { |
| 1117 | src = sv_mortalcopy(src); |
| 1118 | } |
| 1119 | SvTEMP_off(src); |
| 1120 | DEFSV_set(src); |
| 1121 | |
| 1122 | RETURNOP(cLOGOP->op_other); |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | /* Range stuff. */ |
| 1127 | |
| 1128 | PP(pp_range) |
| 1129 | { |
| 1130 | if (GIMME_V == G_ARRAY) |
| 1131 | return NORMAL; |
| 1132 | if (SvTRUEx(PAD_SV(PL_op->op_targ))) |
| 1133 | return cLOGOP->op_other; |
| 1134 | else |
| 1135 | return NORMAL; |
| 1136 | } |
| 1137 | |
| 1138 | PP(pp_flip) |
| 1139 | { |
| 1140 | dSP; |
| 1141 | |
| 1142 | if (GIMME_V == G_ARRAY) { |
| 1143 | RETURNOP(((LOGOP*)cUNOP->op_first)->op_other); |
| 1144 | } |
| 1145 | else { |
| 1146 | dTOPss; |
| 1147 | SV * const targ = PAD_SV(PL_op->op_targ); |
| 1148 | int flip = 0; |
| 1149 | |
| 1150 | if (PL_op->op_private & OPpFLIP_LINENUM) { |
| 1151 | if (GvIO(PL_last_in_gv)) { |
| 1152 | flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)); |
| 1153 | } |
| 1154 | else { |
| 1155 | GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV); |
| 1156 | if (gv && GvSV(gv)) |
| 1157 | flip = SvIV(sv) == SvIV(GvSV(gv)); |
| 1158 | } |
| 1159 | } else { |
| 1160 | flip = SvTRUE(sv); |
| 1161 | } |
| 1162 | if (flip) { |
| 1163 | sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1); |
| 1164 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 1165 | sv_setiv(targ, 1); |
| 1166 | SETs(targ); |
| 1167 | RETURN; |
| 1168 | } |
| 1169 | else { |
| 1170 | sv_setiv(targ, 0); |
| 1171 | SP--; |
| 1172 | RETURNOP(((LOGOP*)cUNOP->op_first)->op_other); |
| 1173 | } |
| 1174 | } |
| 1175 | SvPVCLEAR(TARG); |
| 1176 | SETs(targ); |
| 1177 | RETURN; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | /* This code tries to decide if "$left .. $right" should use the |
| 1182 | magical string increment, or if the range is numeric (we make |
| 1183 | an exception for .."0" [#18165]). AMS 20021031. */ |
| 1184 | |
| 1185 | #define RANGE_IS_NUMERIC(left,right) ( \ |
| 1186 | SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \ |
| 1187 | SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \ |
| 1188 | (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \ |
| 1189 | looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \ |
| 1190 | && (!SvOK(right) || looks_like_number(right)))) |
| 1191 | |
| 1192 | PP(pp_flop) |
| 1193 | { |
| 1194 | dSP; |
| 1195 | |
| 1196 | if (GIMME_V == G_ARRAY) { |
| 1197 | dPOPPOPssrl; |
| 1198 | |
| 1199 | SvGETMAGIC(left); |
| 1200 | SvGETMAGIC(right); |
| 1201 | |
| 1202 | if (RANGE_IS_NUMERIC(left,right)) { |
| 1203 | IV i, j, n; |
| 1204 | if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) || |
| 1205 | (SvOK(right) && (SvIOK(right) |
| 1206 | ? SvIsUV(right) && SvUV(right) > IV_MAX |
| 1207 | : SvNV_nomg(right) > IV_MAX))) |
| 1208 | DIE(aTHX_ "Range iterator outside integer range"); |
| 1209 | i = SvIV_nomg(left); |
| 1210 | j = SvIV_nomg(right); |
| 1211 | if (j >= i) { |
| 1212 | /* Dance carefully around signed max. */ |
| 1213 | bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1); |
| 1214 | if (!overflow) { |
| 1215 | n = j - i + 1; |
| 1216 | /* The wraparound of signed integers is undefined |
| 1217 | * behavior, but here we aim for count >=1, and |
| 1218 | * negative count is just wrong. */ |
| 1219 | if (n < 1 |
| 1220 | #if IVSIZE > Size_t_size |
| 1221 | || n > SSize_t_MAX |
| 1222 | #endif |
| 1223 | ) |
| 1224 | overflow = TRUE; |
| 1225 | } |
| 1226 | if (overflow) |
| 1227 | Perl_croak(aTHX_ "Out of memory during list extend"); |
| 1228 | EXTEND_MORTAL(n); |
| 1229 | EXTEND(SP, n); |
| 1230 | } |
| 1231 | else |
| 1232 | n = 0; |
| 1233 | while (n--) { |
| 1234 | SV * const sv = sv_2mortal(newSViv(i)); |
| 1235 | PUSHs(sv); |
| 1236 | if (n) /* avoid incrementing above IV_MAX */ |
| 1237 | i++; |
| 1238 | } |
| 1239 | } |
| 1240 | else { |
| 1241 | STRLEN len, llen; |
| 1242 | const char * const lpv = SvPV_nomg_const(left, llen); |
| 1243 | const char * const tmps = SvPV_nomg_const(right, len); |
| 1244 | |
| 1245 | SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP); |
| 1246 | if (DO_UTF8(right) && IN_UNI_8_BIT) |
| 1247 | len = sv_len_utf8_nomg(right); |
| 1248 | while (!SvNIOKp(sv) && SvCUR(sv) <= len) { |
| 1249 | XPUSHs(sv); |
| 1250 | if (strEQ(SvPVX_const(sv),tmps)) |
| 1251 | break; |
| 1252 | sv = sv_2mortal(newSVsv(sv)); |
| 1253 | sv_inc(sv); |
| 1254 | } |
| 1255 | } |
| 1256 | } |
| 1257 | else { |
| 1258 | dTOPss; |
| 1259 | SV * const targ = PAD_SV(cUNOP->op_first->op_targ); |
| 1260 | int flop = 0; |
| 1261 | sv_inc(targ); |
| 1262 | |
| 1263 | if (PL_op->op_private & OPpFLIP_LINENUM) { |
| 1264 | if (GvIO(PL_last_in_gv)) { |
| 1265 | flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)); |
| 1266 | } |
| 1267 | else { |
| 1268 | GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV); |
| 1269 | if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv)); |
| 1270 | } |
| 1271 | } |
| 1272 | else { |
| 1273 | flop = SvTRUE(sv); |
| 1274 | } |
| 1275 | |
| 1276 | if (flop) { |
| 1277 | sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0); |
| 1278 | sv_catpvs(targ, "E0"); |
| 1279 | } |
| 1280 | SETs(targ); |
| 1281 | } |
| 1282 | |
| 1283 | RETURN; |
| 1284 | } |
| 1285 | |
| 1286 | /* Control. */ |
| 1287 | |
| 1288 | static const char * const context_name[] = { |
| 1289 | "pseudo-block", |
| 1290 | NULL, /* CXt_WHEN never actually needs "block" */ |
| 1291 | NULL, /* CXt_BLOCK never actually needs "block" */ |
| 1292 | NULL, /* CXt_GIVEN never actually needs "block" */ |
| 1293 | NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */ |
| 1294 | NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */ |
| 1295 | NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */ |
| 1296 | NULL, /* CXt_LOOP_LIST never actually needs "loop" */ |
| 1297 | NULL, /* CXt_LOOP_ARY never actually needs "loop" */ |
| 1298 | "subroutine", |
| 1299 | "format", |
| 1300 | "eval", |
| 1301 | "substitution", |
| 1302 | }; |
| 1303 | |
| 1304 | STATIC I32 |
| 1305 | S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags) |
| 1306 | { |
| 1307 | I32 i; |
| 1308 | |
| 1309 | PERL_ARGS_ASSERT_DOPOPTOLABEL; |
| 1310 | |
| 1311 | for (i = cxstack_ix; i >= 0; i--) { |
| 1312 | const PERL_CONTEXT * const cx = &cxstack[i]; |
| 1313 | switch (CxTYPE(cx)) { |
| 1314 | case CXt_SUBST: |
| 1315 | case CXt_SUB: |
| 1316 | case CXt_FORMAT: |
| 1317 | case CXt_EVAL: |
| 1318 | case CXt_NULL: |
| 1319 | /* diag_listed_as: Exiting subroutine via %s */ |
| 1320 | Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s", |
| 1321 | context_name[CxTYPE(cx)], OP_NAME(PL_op)); |
| 1322 | if (CxTYPE(cx) == CXt_NULL) /* sort BLOCK */ |
| 1323 | return -1; |
| 1324 | break; |
| 1325 | case CXt_LOOP_PLAIN: |
| 1326 | case CXt_LOOP_LAZYIV: |
| 1327 | case CXt_LOOP_LAZYSV: |
| 1328 | case CXt_LOOP_LIST: |
| 1329 | case CXt_LOOP_ARY: |
| 1330 | { |
| 1331 | STRLEN cx_label_len = 0; |
| 1332 | U32 cx_label_flags = 0; |
| 1333 | const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags); |
| 1334 | if (!cx_label || !( |
| 1335 | ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ? |
| 1336 | (flags & SVf_UTF8) |
| 1337 | ? (bytes_cmp_utf8( |
| 1338 | (const U8*)cx_label, cx_label_len, |
| 1339 | (const U8*)label, len) == 0) |
| 1340 | : (bytes_cmp_utf8( |
| 1341 | (const U8*)label, len, |
| 1342 | (const U8*)cx_label, cx_label_len) == 0) |
| 1343 | : (len == cx_label_len && ((cx_label == label) |
| 1344 | || memEQ(cx_label, label, len))) )) { |
| 1345 | DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n", |
| 1346 | (long)i, cx_label)); |
| 1347 | continue; |
| 1348 | } |
| 1349 | DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label)); |
| 1350 | return i; |
| 1351 | } |
| 1352 | } |
| 1353 | } |
| 1354 | return i; |
| 1355 | } |
| 1356 | |
| 1357 | |
| 1358 | |
| 1359 | U8 |
| 1360 | Perl_dowantarray(pTHX) |
| 1361 | { |
| 1362 | const U8 gimme = block_gimme(); |
| 1363 | return (gimme == G_VOID) ? G_SCALAR : gimme; |
| 1364 | } |
| 1365 | |
| 1366 | U8 |
| 1367 | Perl_block_gimme(pTHX) |
| 1368 | { |
| 1369 | const I32 cxix = dopoptosub(cxstack_ix); |
| 1370 | U8 gimme; |
| 1371 | if (cxix < 0) |
| 1372 | return G_VOID; |
| 1373 | |
| 1374 | gimme = (cxstack[cxix].blk_gimme & G_WANT); |
| 1375 | if (!gimme) |
| 1376 | Perl_croak(aTHX_ "panic: bad gimme: %d\n", gimme); |
| 1377 | return gimme; |
| 1378 | } |
| 1379 | |
| 1380 | |
| 1381 | I32 |
| 1382 | Perl_is_lvalue_sub(pTHX) |
| 1383 | { |
| 1384 | const I32 cxix = dopoptosub(cxstack_ix); |
| 1385 | assert(cxix >= 0); /* We should only be called from inside subs */ |
| 1386 | |
| 1387 | if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv)) |
| 1388 | return CxLVAL(cxstack + cxix); |
| 1389 | else |
| 1390 | return 0; |
| 1391 | } |
| 1392 | |
| 1393 | /* only used by cx_pushsub() */ |
| 1394 | I32 |
| 1395 | Perl_was_lvalue_sub(pTHX) |
| 1396 | { |
| 1397 | const I32 cxix = dopoptosub(cxstack_ix-1); |
| 1398 | assert(cxix >= 0); /* We should only be called from inside subs */ |
| 1399 | |
| 1400 | if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv)) |
| 1401 | return CxLVAL(cxstack + cxix); |
| 1402 | else |
| 1403 | return 0; |
| 1404 | } |
| 1405 | |
| 1406 | STATIC I32 |
| 1407 | S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock) |
| 1408 | { |
| 1409 | I32 i; |
| 1410 | |
| 1411 | PERL_ARGS_ASSERT_DOPOPTOSUB_AT; |
| 1412 | #ifndef DEBUGGING |
| 1413 | PERL_UNUSED_CONTEXT; |
| 1414 | #endif |
| 1415 | |
| 1416 | for (i = startingblock; i >= 0; i--) { |
| 1417 | const PERL_CONTEXT * const cx = &cxstk[i]; |
| 1418 | switch (CxTYPE(cx)) { |
| 1419 | default: |
| 1420 | continue; |
| 1421 | case CXt_SUB: |
| 1422 | /* in sub foo { /(?{...})/ }, foo ends up on the CX stack |
| 1423 | * twice; the first for the normal foo() call, and the second |
| 1424 | * for a faked up re-entry into the sub to execute the |
| 1425 | * code block. Hide this faked entry from the world. */ |
| 1426 | if (cx->cx_type & CXp_SUB_RE_FAKE) |
| 1427 | continue; |
| 1428 | /* FALLTHROUGH */ |
| 1429 | case CXt_EVAL: |
| 1430 | case CXt_FORMAT: |
| 1431 | DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i)); |
| 1432 | return i; |
| 1433 | } |
| 1434 | } |
| 1435 | return i; |
| 1436 | } |
| 1437 | |
| 1438 | STATIC I32 |
| 1439 | S_dopoptoeval(pTHX_ I32 startingblock) |
| 1440 | { |
| 1441 | I32 i; |
| 1442 | for (i = startingblock; i >= 0; i--) { |
| 1443 | const PERL_CONTEXT *cx = &cxstack[i]; |
| 1444 | switch (CxTYPE(cx)) { |
| 1445 | default: |
| 1446 | continue; |
| 1447 | case CXt_EVAL: |
| 1448 | DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i)); |
| 1449 | return i; |
| 1450 | } |
| 1451 | } |
| 1452 | return i; |
| 1453 | } |
| 1454 | |
| 1455 | STATIC I32 |
| 1456 | S_dopoptoloop(pTHX_ I32 startingblock) |
| 1457 | { |
| 1458 | I32 i; |
| 1459 | for (i = startingblock; i >= 0; i--) { |
| 1460 | const PERL_CONTEXT * const cx = &cxstack[i]; |
| 1461 | switch (CxTYPE(cx)) { |
| 1462 | case CXt_SUBST: |
| 1463 | case CXt_SUB: |
| 1464 | case CXt_FORMAT: |
| 1465 | case CXt_EVAL: |
| 1466 | case CXt_NULL: |
| 1467 | /* diag_listed_as: Exiting subroutine via %s */ |
| 1468 | Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s", |
| 1469 | context_name[CxTYPE(cx)], OP_NAME(PL_op)); |
| 1470 | if ((CxTYPE(cx)) == CXt_NULL) /* sort BLOCK */ |
| 1471 | return -1; |
| 1472 | break; |
| 1473 | case CXt_LOOP_PLAIN: |
| 1474 | case CXt_LOOP_LAZYIV: |
| 1475 | case CXt_LOOP_LAZYSV: |
| 1476 | case CXt_LOOP_LIST: |
| 1477 | case CXt_LOOP_ARY: |
| 1478 | DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i)); |
| 1479 | return i; |
| 1480 | } |
| 1481 | } |
| 1482 | return i; |
| 1483 | } |
| 1484 | |
| 1485 | /* find the next GIVEN or FOR (with implicit $_) loop context block */ |
| 1486 | |
| 1487 | STATIC I32 |
| 1488 | S_dopoptogivenfor(pTHX_ I32 startingblock) |
| 1489 | { |
| 1490 | I32 i; |
| 1491 | for (i = startingblock; i >= 0; i--) { |
| 1492 | const PERL_CONTEXT *cx = &cxstack[i]; |
| 1493 | switch (CxTYPE(cx)) { |
| 1494 | default: |
| 1495 | continue; |
| 1496 | case CXt_GIVEN: |
| 1497 | DEBUG_l( Perl_deb(aTHX_ "(dopoptogivenfor(): found given at cx=%ld)\n", (long)i)); |
| 1498 | return i; |
| 1499 | case CXt_LOOP_PLAIN: |
| 1500 | assert(!(cx->cx_type & CXp_FOR_DEF)); |
| 1501 | break; |
| 1502 | case CXt_LOOP_LAZYIV: |
| 1503 | case CXt_LOOP_LAZYSV: |
| 1504 | case CXt_LOOP_LIST: |
| 1505 | case CXt_LOOP_ARY: |
| 1506 | if (cx->cx_type & CXp_FOR_DEF) { |
| 1507 | DEBUG_l( Perl_deb(aTHX_ "(dopoptogivenfor(): found foreach at cx=%ld)\n", (long)i)); |
| 1508 | return i; |
| 1509 | } |
| 1510 | } |
| 1511 | } |
| 1512 | return i; |
| 1513 | } |
| 1514 | |
| 1515 | STATIC I32 |
| 1516 | S_dopoptowhen(pTHX_ I32 startingblock) |
| 1517 | { |
| 1518 | I32 i; |
| 1519 | for (i = startingblock; i >= 0; i--) { |
| 1520 | const PERL_CONTEXT *cx = &cxstack[i]; |
| 1521 | switch (CxTYPE(cx)) { |
| 1522 | default: |
| 1523 | continue; |
| 1524 | case CXt_WHEN: |
| 1525 | DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i)); |
| 1526 | return i; |
| 1527 | } |
| 1528 | } |
| 1529 | return i; |
| 1530 | } |
| 1531 | |
| 1532 | /* dounwind(): pop all contexts above (but not including) cxix. |
| 1533 | * Note that it clears the savestack frame associated with each popped |
| 1534 | * context entry, but doesn't free any temps. |
| 1535 | * It does a cx_popblock() of the last frame that it pops, and leaves |
| 1536 | * cxstack_ix equal to cxix. |
| 1537 | */ |
| 1538 | |
| 1539 | void |
| 1540 | Perl_dounwind(pTHX_ I32 cxix) |
| 1541 | { |
| 1542 | if (!PL_curstackinfo) /* can happen if die during thread cloning */ |
| 1543 | return; |
| 1544 | |
| 1545 | while (cxstack_ix > cxix) { |
| 1546 | PERL_CONTEXT *cx = CX_CUR(); |
| 1547 | |
| 1548 | CX_DEBUG(cx, "UNWIND"); |
| 1549 | /* Note: we don't need to restore the base context info till the end. */ |
| 1550 | |
| 1551 | CX_LEAVE_SCOPE(cx); |
| 1552 | |
| 1553 | switch (CxTYPE(cx)) { |
| 1554 | case CXt_SUBST: |
| 1555 | CX_POPSUBST(cx); |
| 1556 | /* CXt_SUBST is not a block context type, so skip the |
| 1557 | * cx_popblock(cx) below */ |
| 1558 | if (cxstack_ix == cxix + 1) { |
| 1559 | cxstack_ix--; |
| 1560 | return; |
| 1561 | } |
| 1562 | break; |
| 1563 | case CXt_SUB: |
| 1564 | cx_popsub(cx); |
| 1565 | break; |
| 1566 | case CXt_EVAL: |
| 1567 | cx_popeval(cx); |
| 1568 | break; |
| 1569 | case CXt_LOOP_PLAIN: |
| 1570 | case CXt_LOOP_LAZYIV: |
| 1571 | case CXt_LOOP_LAZYSV: |
| 1572 | case CXt_LOOP_LIST: |
| 1573 | case CXt_LOOP_ARY: |
| 1574 | cx_poploop(cx); |
| 1575 | break; |
| 1576 | case CXt_WHEN: |
| 1577 | cx_popwhen(cx); |
| 1578 | break; |
| 1579 | case CXt_GIVEN: |
| 1580 | cx_popgiven(cx); |
| 1581 | break; |
| 1582 | case CXt_BLOCK: |
| 1583 | case CXt_NULL: |
| 1584 | /* these two don't have a POPFOO() */ |
| 1585 | break; |
| 1586 | case CXt_FORMAT: |
| 1587 | cx_popformat(cx); |
| 1588 | break; |
| 1589 | } |
| 1590 | if (cxstack_ix == cxix + 1) { |
| 1591 | cx_popblock(cx); |
| 1592 | } |
| 1593 | cxstack_ix--; |
| 1594 | } |
| 1595 | |
| 1596 | } |
| 1597 | |
| 1598 | void |
| 1599 | Perl_qerror(pTHX_ SV *err) |
| 1600 | { |
| 1601 | PERL_ARGS_ASSERT_QERROR; |
| 1602 | |
| 1603 | if (PL_in_eval) { |
| 1604 | if (PL_in_eval & EVAL_KEEPERR) { |
| 1605 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %" SVf, |
| 1606 | SVfARG(err)); |
| 1607 | } |
| 1608 | else |
| 1609 | sv_catsv(ERRSV, err); |
| 1610 | } |
| 1611 | else if (PL_errors) |
| 1612 | sv_catsv(PL_errors, err); |
| 1613 | else |
| 1614 | Perl_warn(aTHX_ "%" SVf, SVfARG(err)); |
| 1615 | if (PL_parser) |
| 1616 | ++PL_parser->error_count; |
| 1617 | } |
| 1618 | |
| 1619 | |
| 1620 | |
| 1621 | /* pop a CXt_EVAL context and in addition, if it was a require then |
| 1622 | * based on action: |
| 1623 | * 0: do nothing extra; |
| 1624 | * 1: undef $INC{$name}; croak "$name did not return a true value"; |
| 1625 | * 2: delete $INC{$name}; croak "$errsv: Compilation failed in require" |
| 1626 | */ |
| 1627 | |
| 1628 | static void |
| 1629 | S_pop_eval_context_maybe_croak(pTHX_ PERL_CONTEXT *cx, SV *errsv, int action) |
| 1630 | { |
| 1631 | SV *namesv = NULL; /* init to avoid dumb compiler warning */ |
| 1632 | bool do_croak; |
| 1633 | |
| 1634 | CX_LEAVE_SCOPE(cx); |
| 1635 | do_croak = action && (CxOLD_OP_TYPE(cx) == OP_REQUIRE); |
| 1636 | if (do_croak) { |
| 1637 | /* keep namesv alive after cx_popeval() */ |
| 1638 | namesv = cx->blk_eval.old_namesv; |
| 1639 | cx->blk_eval.old_namesv = NULL; |
| 1640 | sv_2mortal(namesv); |
| 1641 | } |
| 1642 | cx_popeval(cx); |
| 1643 | cx_popblock(cx); |
| 1644 | CX_POP(cx); |
| 1645 | |
| 1646 | if (do_croak) { |
| 1647 | const char *fmt; |
| 1648 | HV *inc_hv = GvHVn(PL_incgv); |
| 1649 | I32 klen = SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv); |
| 1650 | const char *key = SvPVX_const(namesv); |
| 1651 | |
| 1652 | if (action == 1) { |
| 1653 | (void)hv_delete(inc_hv, key, klen, G_DISCARD); |
| 1654 | fmt = "%" SVf " did not return a true value"; |
| 1655 | errsv = namesv; |
| 1656 | } |
| 1657 | else { |
| 1658 | (void)hv_store(inc_hv, key, klen, &PL_sv_undef, 0); |
| 1659 | fmt = "%" SVf "Compilation failed in require"; |
| 1660 | if (!errsv) |
| 1661 | errsv = newSVpvs_flags("Unknown error\n", SVs_TEMP); |
| 1662 | } |
| 1663 | |
| 1664 | Perl_croak(aTHX_ fmt, SVfARG(errsv)); |
| 1665 | } |
| 1666 | } |
| 1667 | |
| 1668 | |
| 1669 | /* die_unwind(): this is the final destination for the various croak() |
| 1670 | * functions. If we're in an eval, unwind the context and other stacks |
| 1671 | * back to the top-most CXt_EVAL and set $@ to msv; otherwise print msv |
| 1672 | * to STDERR and initiate an exit. Note that if the CXt_EVAL popped back |
| 1673 | * to is a require the exception will be rethrown, as requires don't |
| 1674 | * actually trap exceptions. |
| 1675 | */ |
| 1676 | |
| 1677 | void |
| 1678 | Perl_die_unwind(pTHX_ SV *msv) |
| 1679 | { |
| 1680 | SV *exceptsv = msv; |
| 1681 | U8 in_eval = PL_in_eval; |
| 1682 | PERL_ARGS_ASSERT_DIE_UNWIND; |
| 1683 | |
| 1684 | if (in_eval) { |
| 1685 | I32 cxix; |
| 1686 | |
| 1687 | exceptsv = sv_2mortal(SvREFCNT_inc_simple_NN(exceptsv)); |
| 1688 | |
| 1689 | /* |
| 1690 | * Historically, perl used to set ERRSV ($@) early in the die |
| 1691 | * process and rely on it not getting clobbered during unwinding. |
| 1692 | * That sucked, because it was liable to get clobbered, so the |
| 1693 | * setting of ERRSV used to emit the exception from eval{} has |
| 1694 | * been moved to much later, after unwinding (see just before |
| 1695 | * JMPENV_JUMP below). However, some modules were relying on the |
| 1696 | * early setting, by examining $@ during unwinding to use it as |
| 1697 | * a flag indicating whether the current unwinding was caused by |
| 1698 | * an exception. It was never a reliable flag for that purpose, |
| 1699 | * being totally open to false positives even without actual |
| 1700 | * clobberage, but was useful enough for production code to |
| 1701 | * semantically rely on it. |
| 1702 | * |
| 1703 | * We'd like to have a proper introspective interface that |
| 1704 | * explicitly describes the reason for whatever unwinding |
| 1705 | * operations are currently in progress, so that those modules |
| 1706 | * work reliably and $@ isn't further overloaded. But we don't |
| 1707 | * have one yet. In its absence, as a stopgap measure, ERRSV is |
| 1708 | * now *additionally* set here, before unwinding, to serve as the |
| 1709 | * (unreliable) flag that it used to. |
| 1710 | * |
| 1711 | * This behaviour is temporary, and should be removed when a |
| 1712 | * proper way to detect exceptional unwinding has been developed. |
| 1713 | * As of 2010-12, the authors of modules relying on the hack |
| 1714 | * are aware of the issue, because the modules failed on |
| 1715 | * perls 5.13.{1..7} which had late setting of $@ without this |
| 1716 | * early-setting hack. |
| 1717 | */ |
| 1718 | if (!(in_eval & EVAL_KEEPERR)) |
| 1719 | sv_setsv_flags(ERRSV, exceptsv, |
| 1720 | (SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL)); |
| 1721 | |
| 1722 | if (in_eval & EVAL_KEEPERR) { |
| 1723 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %" SVf, |
| 1724 | SVfARG(exceptsv)); |
| 1725 | } |
| 1726 | |
| 1727 | while ((cxix = dopoptoeval(cxstack_ix)) < 0 |
| 1728 | && PL_curstackinfo->si_prev) |
| 1729 | { |
| 1730 | dounwind(-1); |
| 1731 | POPSTACK; |
| 1732 | } |
| 1733 | |
| 1734 | if (cxix >= 0) { |
| 1735 | PERL_CONTEXT *cx; |
| 1736 | SV **oldsp; |
| 1737 | U8 gimme; |
| 1738 | JMPENV *restartjmpenv; |
| 1739 | OP *restartop; |
| 1740 | |
| 1741 | if (cxix < cxstack_ix) |
| 1742 | dounwind(cxix); |
| 1743 | |
| 1744 | cx = CX_CUR(); |
| 1745 | assert(CxTYPE(cx) == CXt_EVAL); |
| 1746 | |
| 1747 | /* return false to the caller of eval */ |
| 1748 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 1749 | gimme = cx->blk_gimme; |
| 1750 | if (gimme == G_SCALAR) |
| 1751 | *++oldsp = &PL_sv_undef; |
| 1752 | PL_stack_sp = oldsp; |
| 1753 | |
| 1754 | restartjmpenv = cx->blk_eval.cur_top_env; |
| 1755 | restartop = cx->blk_eval.retop; |
| 1756 | /* Note that unlike pp_entereval, pp_require isn't supposed to |
| 1757 | * trap errors. So if we're a require, after we pop the |
| 1758 | * CXt_EVAL that pp_require pushed, rethrow the error with |
| 1759 | * croak(exceptsv). This is all handled by the call below when |
| 1760 | * action == 2. |
| 1761 | */ |
| 1762 | S_pop_eval_context_maybe_croak(aTHX_ cx, exceptsv, 2); |
| 1763 | |
| 1764 | if (!(in_eval & EVAL_KEEPERR)) |
| 1765 | sv_setsv(ERRSV, exceptsv); |
| 1766 | PL_restartjmpenv = restartjmpenv; |
| 1767 | PL_restartop = restartop; |
| 1768 | JMPENV_JUMP(3); |
| 1769 | NOT_REACHED; /* NOTREACHED */ |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | write_to_stderr(exceptsv); |
| 1774 | my_failure_exit(); |
| 1775 | NOT_REACHED; /* NOTREACHED */ |
| 1776 | } |
| 1777 | |
| 1778 | PP(pp_xor) |
| 1779 | { |
| 1780 | dSP; dPOPTOPssrl; |
| 1781 | if (SvTRUE(left) != SvTRUE(right)) |
| 1782 | RETSETYES; |
| 1783 | else |
| 1784 | RETSETNO; |
| 1785 | } |
| 1786 | |
| 1787 | /* |
| 1788 | |
| 1789 | =head1 CV Manipulation Functions |
| 1790 | |
| 1791 | =for apidoc caller_cx |
| 1792 | |
| 1793 | The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The |
| 1794 | returned C<PERL_CONTEXT> structure can be interrogated to find all the |
| 1795 | information returned to Perl by C<caller>. Note that XSUBs don't get a |
| 1796 | stack frame, so C<caller_cx(0, NULL)> will return information for the |
| 1797 | immediately-surrounding Perl code. |
| 1798 | |
| 1799 | This function skips over the automatic calls to C<&DB::sub> made on the |
| 1800 | behalf of the debugger. If the stack frame requested was a sub called by |
| 1801 | C<DB::sub>, the return value will be the frame for the call to |
| 1802 | C<DB::sub>, since that has the correct line number/etc. for the call |
| 1803 | site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the |
| 1804 | frame for the sub call itself. |
| 1805 | |
| 1806 | =cut |
| 1807 | */ |
| 1808 | |
| 1809 | const PERL_CONTEXT * |
| 1810 | Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp) |
| 1811 | { |
| 1812 | I32 cxix = dopoptosub(cxstack_ix); |
| 1813 | const PERL_CONTEXT *cx; |
| 1814 | const PERL_CONTEXT *ccstack = cxstack; |
| 1815 | const PERL_SI *top_si = PL_curstackinfo; |
| 1816 | |
| 1817 | for (;;) { |
| 1818 | /* we may be in a higher stacklevel, so dig down deeper */ |
| 1819 | while (cxix < 0 && top_si->si_type != PERLSI_MAIN) { |
| 1820 | top_si = top_si->si_prev; |
| 1821 | ccstack = top_si->si_cxstack; |
| 1822 | cxix = dopoptosub_at(ccstack, top_si->si_cxix); |
| 1823 | } |
| 1824 | if (cxix < 0) |
| 1825 | return NULL; |
| 1826 | /* caller() should not report the automatic calls to &DB::sub */ |
| 1827 | if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 && |
| 1828 | ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub)) |
| 1829 | count++; |
| 1830 | if (!count--) |
| 1831 | break; |
| 1832 | cxix = dopoptosub_at(ccstack, cxix - 1); |
| 1833 | } |
| 1834 | |
| 1835 | cx = &ccstack[cxix]; |
| 1836 | if (dbcxp) *dbcxp = cx; |
| 1837 | |
| 1838 | if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { |
| 1839 | const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1); |
| 1840 | /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the |
| 1841 | field below is defined for any cx. */ |
| 1842 | /* caller() should not report the automatic calls to &DB::sub */ |
| 1843 | if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub)) |
| 1844 | cx = &ccstack[dbcxix]; |
| 1845 | } |
| 1846 | |
| 1847 | return cx; |
| 1848 | } |
| 1849 | |
| 1850 | PP(pp_caller) |
| 1851 | { |
| 1852 | dSP; |
| 1853 | const PERL_CONTEXT *cx; |
| 1854 | const PERL_CONTEXT *dbcx; |
| 1855 | U8 gimme = GIMME_V; |
| 1856 | const HEK *stash_hek; |
| 1857 | I32 count = 0; |
| 1858 | bool has_arg = MAXARG && TOPs; |
| 1859 | const COP *lcop; |
| 1860 | |
| 1861 | if (MAXARG) { |
| 1862 | if (has_arg) |
| 1863 | count = POPi; |
| 1864 | else (void)POPs; |
| 1865 | } |
| 1866 | |
| 1867 | cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx); |
| 1868 | if (!cx) { |
| 1869 | if (gimme != G_ARRAY) { |
| 1870 | EXTEND(SP, 1); |
| 1871 | RETPUSHUNDEF; |
| 1872 | } |
| 1873 | RETURN; |
| 1874 | } |
| 1875 | |
| 1876 | CX_DEBUG(cx, "CALLER"); |
| 1877 | assert(CopSTASH(cx->blk_oldcop)); |
| 1878 | stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV |
| 1879 | ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop)) |
| 1880 | : NULL; |
| 1881 | if (gimme != G_ARRAY) { |
| 1882 | EXTEND(SP, 1); |
| 1883 | if (!stash_hek) |
| 1884 | PUSHs(&PL_sv_undef); |
| 1885 | else { |
| 1886 | dTARGET; |
| 1887 | sv_sethek(TARG, stash_hek); |
| 1888 | PUSHs(TARG); |
| 1889 | } |
| 1890 | RETURN; |
| 1891 | } |
| 1892 | |
| 1893 | EXTEND(SP, 11); |
| 1894 | |
| 1895 | if (!stash_hek) |
| 1896 | PUSHs(&PL_sv_undef); |
| 1897 | else { |
| 1898 | dTARGET; |
| 1899 | sv_sethek(TARG, stash_hek); |
| 1900 | PUSHTARG; |
| 1901 | } |
| 1902 | mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0)); |
| 1903 | lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop), |
| 1904 | cx->blk_sub.retop, TRUE); |
| 1905 | if (!lcop) |
| 1906 | lcop = cx->blk_oldcop; |
| 1907 | mPUSHu(CopLINE(lcop)); |
| 1908 | if (!has_arg) |
| 1909 | RETURN; |
| 1910 | if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { |
| 1911 | /* So is ccstack[dbcxix]. */ |
| 1912 | if (CvHASGV(dbcx->blk_sub.cv)) { |
| 1913 | PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0)); |
| 1914 | PUSHs(boolSV(CxHASARGS(cx))); |
| 1915 | } |
| 1916 | else { |
| 1917 | PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP)); |
| 1918 | PUSHs(boolSV(CxHASARGS(cx))); |
| 1919 | } |
| 1920 | } |
| 1921 | else { |
| 1922 | PUSHs(newSVpvs_flags("(eval)", SVs_TEMP)); |
| 1923 | mPUSHi(0); |
| 1924 | } |
| 1925 | gimme = cx->blk_gimme; |
| 1926 | if (gimme == G_VOID) |
| 1927 | PUSHs(&PL_sv_undef); |
| 1928 | else |
| 1929 | PUSHs(boolSV((gimme & G_WANT) == G_ARRAY)); |
| 1930 | if (CxTYPE(cx) == CXt_EVAL) { |
| 1931 | /* eval STRING */ |
| 1932 | if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) { |
| 1933 | SV *cur_text = cx->blk_eval.cur_text; |
| 1934 | if (SvCUR(cur_text) >= 2) { |
| 1935 | PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2, |
| 1936 | SvUTF8(cur_text)|SVs_TEMP)); |
| 1937 | } |
| 1938 | else { |
| 1939 | /* I think this is will always be "", but be sure */ |
| 1940 | PUSHs(sv_2mortal(newSVsv(cur_text))); |
| 1941 | } |
| 1942 | |
| 1943 | PUSHs(&PL_sv_no); |
| 1944 | } |
| 1945 | /* require */ |
| 1946 | else if (cx->blk_eval.old_namesv) { |
| 1947 | mPUSHs(newSVsv(cx->blk_eval.old_namesv)); |
| 1948 | PUSHs(&PL_sv_yes); |
| 1949 | } |
| 1950 | /* eval BLOCK (try blocks have old_namesv == 0) */ |
| 1951 | else { |
| 1952 | PUSHs(&PL_sv_undef); |
| 1953 | PUSHs(&PL_sv_undef); |
| 1954 | } |
| 1955 | } |
| 1956 | else { |
| 1957 | PUSHs(&PL_sv_undef); |
| 1958 | PUSHs(&PL_sv_undef); |
| 1959 | } |
| 1960 | if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx) |
| 1961 | && CopSTASH_eq(PL_curcop, PL_debstash)) |
| 1962 | { |
| 1963 | /* slot 0 of the pad contains the original @_ */ |
| 1964 | AV * const ary = MUTABLE_AV(AvARRAY(MUTABLE_AV( |
| 1965 | PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ |
| 1966 | cx->blk_sub.olddepth+1]))[0]); |
| 1967 | const SSize_t off = AvARRAY(ary) - AvALLOC(ary); |
| 1968 | |
| 1969 | Perl_init_dbargs(aTHX); |
| 1970 | |
| 1971 | if (AvMAX(PL_dbargs) < AvFILLp(ary) + off) |
| 1972 | av_extend(PL_dbargs, AvFILLp(ary) + off); |
| 1973 | Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*); |
| 1974 | AvFILLp(PL_dbargs) = AvFILLp(ary) + off; |
| 1975 | } |
| 1976 | mPUSHi(CopHINTS_get(cx->blk_oldcop)); |
| 1977 | { |
| 1978 | SV * mask ; |
| 1979 | STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ; |
| 1980 | |
| 1981 | if (old_warnings == pWARN_NONE) |
| 1982 | mask = newSVpvn(WARN_NONEstring, WARNsize) ; |
| 1983 | else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0) |
| 1984 | mask = &PL_sv_undef ; |
| 1985 | else if (old_warnings == pWARN_ALL || |
| 1986 | (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) { |
| 1987 | /* Get the bit mask for $warnings::Bits{all}, because |
| 1988 | * it could have been extended by warnings::register */ |
| 1989 | SV **bits_all; |
| 1990 | HV * const bits = get_hv("warnings::Bits", 0); |
| 1991 | if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) { |
| 1992 | mask = newSVsv(*bits_all); |
| 1993 | } |
| 1994 | else { |
| 1995 | mask = newSVpvn(WARN_ALLstring, WARNsize) ; |
| 1996 | } |
| 1997 | } |
| 1998 | else |
| 1999 | mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]); |
| 2000 | mPUSHs(mask); |
| 2001 | } |
| 2002 | |
| 2003 | PUSHs(cx->blk_oldcop->cop_hints_hash ? |
| 2004 | sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0)))) |
| 2005 | : &PL_sv_undef); |
| 2006 | RETURN; |
| 2007 | } |
| 2008 | |
| 2009 | PP(pp_reset) |
| 2010 | { |
| 2011 | dSP; |
| 2012 | const char * tmps; |
| 2013 | STRLEN len = 0; |
| 2014 | if (MAXARG < 1 || (!TOPs && !POPs)) |
| 2015 | tmps = NULL, len = 0; |
| 2016 | else |
| 2017 | tmps = SvPVx_const(POPs, len); |
| 2018 | sv_resetpvn(tmps, len, CopSTASH(PL_curcop)); |
| 2019 | PUSHs(&PL_sv_yes); |
| 2020 | RETURN; |
| 2021 | } |
| 2022 | |
| 2023 | /* like pp_nextstate, but used instead when the debugger is active */ |
| 2024 | |
| 2025 | PP(pp_dbstate) |
| 2026 | { |
| 2027 | PL_curcop = (COP*)PL_op; |
| 2028 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 2029 | PL_stack_sp = PL_stack_base + CX_CUR()->blk_oldsp; |
| 2030 | FREETMPS; |
| 2031 | |
| 2032 | PERL_ASYNC_CHECK(); |
| 2033 | |
| 2034 | if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */ |
| 2035 | || PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv) |
| 2036 | { |
| 2037 | dSP; |
| 2038 | PERL_CONTEXT *cx; |
| 2039 | const U8 gimme = G_ARRAY; |
| 2040 | GV * const gv = PL_DBgv; |
| 2041 | CV * cv = NULL; |
| 2042 | |
| 2043 | if (gv && isGV_with_GP(gv)) |
| 2044 | cv = GvCV(gv); |
| 2045 | |
| 2046 | if (!cv || (!CvROOT(cv) && !CvXSUB(cv))) |
| 2047 | DIE(aTHX_ "No DB::DB routine defined"); |
| 2048 | |
| 2049 | if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG)) |
| 2050 | /* don't do recursive DB::DB call */ |
| 2051 | return NORMAL; |
| 2052 | |
| 2053 | if (CvISXSUB(cv)) { |
| 2054 | ENTER; |
| 2055 | SAVEI32(PL_debug); |
| 2056 | PL_debug = 0; |
| 2057 | SAVESTACK_POS(); |
| 2058 | SAVETMPS; |
| 2059 | PUSHMARK(SP); |
| 2060 | (void)(*CvXSUB(cv))(aTHX_ cv); |
| 2061 | FREETMPS; |
| 2062 | LEAVE; |
| 2063 | return NORMAL; |
| 2064 | } |
| 2065 | else { |
| 2066 | cx = cx_pushblock(CXt_SUB, gimme, SP, PL_savestack_ix); |
| 2067 | cx_pushsub(cx, cv, PL_op->op_next, 0); |
| 2068 | /* OP_DBSTATE's op_private holds hint bits rather than |
| 2069 | * the lvalue-ish flags seen in OP_ENTERSUB. So cancel |
| 2070 | * any CxLVAL() flags that have now been mis-calculated */ |
| 2071 | cx->blk_u16 = 0; |
| 2072 | |
| 2073 | SAVEI32(PL_debug); |
| 2074 | PL_debug = 0; |
| 2075 | SAVESTACK_POS(); |
| 2076 | CvDEPTH(cv)++; |
| 2077 | if (CvDEPTH(cv) >= 2) |
| 2078 | pad_push(CvPADLIST(cv), CvDEPTH(cv)); |
| 2079 | PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv)); |
| 2080 | RETURNOP(CvSTART(cv)); |
| 2081 | } |
| 2082 | } |
| 2083 | else |
| 2084 | return NORMAL; |
| 2085 | } |
| 2086 | |
| 2087 | |
| 2088 | PP(pp_enter) |
| 2089 | { |
| 2090 | U8 gimme = GIMME_V; |
| 2091 | |
| 2092 | (void)cx_pushblock(CXt_BLOCK, gimme, PL_stack_sp, PL_savestack_ix); |
| 2093 | return NORMAL; |
| 2094 | } |
| 2095 | |
| 2096 | |
| 2097 | PP(pp_leave) |
| 2098 | { |
| 2099 | PERL_CONTEXT *cx; |
| 2100 | SV **oldsp; |
| 2101 | U8 gimme; |
| 2102 | |
| 2103 | cx = CX_CUR(); |
| 2104 | assert(CxTYPE(cx) == CXt_BLOCK); |
| 2105 | |
| 2106 | if (PL_op->op_flags & OPf_SPECIAL) |
| 2107 | /* fake block should preserve $1 et al; e.g. /(...)/ while ...; */ |
| 2108 | cx->blk_oldpm = PL_curpm; |
| 2109 | |
| 2110 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 2111 | gimme = cx->blk_gimme; |
| 2112 | |
| 2113 | if (gimme == G_VOID) |
| 2114 | PL_stack_sp = oldsp; |
| 2115 | else |
| 2116 | leave_adjust_stacks(oldsp, oldsp, gimme, |
| 2117 | PL_op->op_private & OPpLVALUE ? 3 : 1); |
| 2118 | |
| 2119 | CX_LEAVE_SCOPE(cx); |
| 2120 | cx_popblock(cx); |
| 2121 | CX_POP(cx); |
| 2122 | |
| 2123 | return NORMAL; |
| 2124 | } |
| 2125 | |
| 2126 | static bool |
| 2127 | S_outside_integer(pTHX_ SV *sv) |
| 2128 | { |
| 2129 | if (SvOK(sv)) { |
| 2130 | const NV nv = SvNV_nomg(sv); |
| 2131 | if (Perl_isinfnan(nv)) |
| 2132 | return TRUE; |
| 2133 | #ifdef NV_PRESERVES_UV |
| 2134 | if (nv < (NV)IV_MIN || nv > (NV)IV_MAX) |
| 2135 | return TRUE; |
| 2136 | #else |
| 2137 | if (nv <= (NV)IV_MIN) |
| 2138 | return TRUE; |
| 2139 | if ((nv > 0) && |
| 2140 | ((nv > (NV)UV_MAX || |
| 2141 | SvUV_nomg(sv) > (UV)IV_MAX))) |
| 2142 | return TRUE; |
| 2143 | #endif |
| 2144 | } |
| 2145 | return FALSE; |
| 2146 | } |
| 2147 | |
| 2148 | PP(pp_enteriter) |
| 2149 | { |
| 2150 | dSP; dMARK; |
| 2151 | PERL_CONTEXT *cx; |
| 2152 | const U8 gimme = GIMME_V; |
| 2153 | void *itervarp; /* GV or pad slot of the iteration variable */ |
| 2154 | SV *itersave; /* the old var in the iterator var slot */ |
| 2155 | U8 cxflags = 0; |
| 2156 | |
| 2157 | if (PL_op->op_targ) { /* "my" variable */ |
| 2158 | itervarp = &PAD_SVl(PL_op->op_targ); |
| 2159 | itersave = *(SV**)itervarp; |
| 2160 | assert(itersave); |
| 2161 | if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */ |
| 2162 | /* the SV currently in the pad slot is never live during |
| 2163 | * iteration (the slot is always aliased to one of the items) |
| 2164 | * so it's always stale */ |
| 2165 | SvPADSTALE_on(itersave); |
| 2166 | } |
| 2167 | SvREFCNT_inc_simple_void_NN(itersave); |
| 2168 | cxflags = CXp_FOR_PAD; |
| 2169 | } |
| 2170 | else { |
| 2171 | SV * const sv = POPs; |
| 2172 | itervarp = (void *)sv; |
| 2173 | if (LIKELY(isGV(sv))) { /* symbol table variable */ |
| 2174 | itersave = GvSV(sv); |
| 2175 | SvREFCNT_inc_simple_void(itersave); |
| 2176 | cxflags = CXp_FOR_GV; |
| 2177 | if (PL_op->op_private & OPpITER_DEF) |
| 2178 | cxflags |= CXp_FOR_DEF; |
| 2179 | } |
| 2180 | else { /* LV ref: for \$foo (...) */ |
| 2181 | assert(SvTYPE(sv) == SVt_PVMG); |
| 2182 | assert(SvMAGIC(sv)); |
| 2183 | assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref); |
| 2184 | itersave = NULL; |
| 2185 | cxflags = CXp_FOR_LVREF; |
| 2186 | } |
| 2187 | } |
| 2188 | /* OPpITER_DEF (implicit $_) should only occur with a GV iter var */ |
| 2189 | assert((cxflags & CXp_FOR_GV) || !(PL_op->op_private & OPpITER_DEF)); |
| 2190 | |
| 2191 | /* Note that this context is initially set as CXt_NULL. Further on |
| 2192 | * down it's changed to one of the CXt_LOOP_*. Before it's changed, |
| 2193 | * there mustn't be anything in the blk_loop substruct that requires |
| 2194 | * freeing or undoing, in case we die in the meantime. And vice-versa. |
| 2195 | */ |
| 2196 | cx = cx_pushblock(cxflags, gimme, MARK, PL_savestack_ix); |
| 2197 | cx_pushloop_for(cx, itervarp, itersave); |
| 2198 | |
| 2199 | if (PL_op->op_flags & OPf_STACKED) { |
| 2200 | /* OPf_STACKED implies either a single array: for(@), with a |
| 2201 | * single AV on the stack, or a range: for (1..5), with 1 and 5 on |
| 2202 | * the stack */ |
| 2203 | SV *maybe_ary = POPs; |
| 2204 | if (SvTYPE(maybe_ary) != SVt_PVAV) { |
| 2205 | /* range */ |
| 2206 | dPOPss; |
| 2207 | SV * const right = maybe_ary; |
| 2208 | if (UNLIKELY(cxflags & CXp_FOR_LVREF)) |
| 2209 | DIE(aTHX_ "Assigned value is not a reference"); |
| 2210 | SvGETMAGIC(sv); |
| 2211 | SvGETMAGIC(right); |
| 2212 | if (RANGE_IS_NUMERIC(sv,right)) { |
| 2213 | cx->cx_type |= CXt_LOOP_LAZYIV; |
| 2214 | if (S_outside_integer(aTHX_ sv) || |
| 2215 | S_outside_integer(aTHX_ right)) |
| 2216 | DIE(aTHX_ "Range iterator outside integer range"); |
| 2217 | cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv); |
| 2218 | cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right); |
| 2219 | } |
| 2220 | else { |
| 2221 | cx->cx_type |= CXt_LOOP_LAZYSV; |
| 2222 | cx->blk_loop.state_u.lazysv.cur = newSVsv(sv); |
| 2223 | cx->blk_loop.state_u.lazysv.end = right; |
| 2224 | SvREFCNT_inc_simple_void_NN(right); |
| 2225 | (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur); |
| 2226 | /* This will do the upgrade to SVt_PV, and warn if the value |
| 2227 | is uninitialised. */ |
| 2228 | (void) SvPV_nolen_const(right); |
| 2229 | /* Doing this avoids a check every time in pp_iter in pp_hot.c |
| 2230 | to replace !SvOK() with a pointer to "". */ |
| 2231 | if (!SvOK(right)) { |
| 2232 | SvREFCNT_dec(right); |
| 2233 | cx->blk_loop.state_u.lazysv.end = &PL_sv_no; |
| 2234 | } |
| 2235 | } |
| 2236 | } |
| 2237 | else /* SvTYPE(maybe_ary) == SVt_PVAV */ { |
| 2238 | /* for (@array) {} */ |
| 2239 | cx->cx_type |= CXt_LOOP_ARY; |
| 2240 | cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary); |
| 2241 | SvREFCNT_inc_simple_void_NN(maybe_ary); |
| 2242 | cx->blk_loop.state_u.ary.ix = |
| 2243 | (PL_op->op_private & OPpITER_REVERSED) ? |
| 2244 | AvFILL(cx->blk_loop.state_u.ary.ary) + 1 : |
| 2245 | -1; |
| 2246 | } |
| 2247 | /* EXTEND(SP, 1) not needed in this branch because we just did POPs */ |
| 2248 | } |
| 2249 | else { /* iterating over items on the stack */ |
| 2250 | cx->cx_type |= CXt_LOOP_LIST; |
| 2251 | cx->blk_oldsp = SP - PL_stack_base; |
| 2252 | cx->blk_loop.state_u.stack.basesp = MARK - PL_stack_base; |
| 2253 | cx->blk_loop.state_u.stack.ix = |
| 2254 | (PL_op->op_private & OPpITER_REVERSED) |
| 2255 | ? cx->blk_oldsp + 1 |
| 2256 | : cx->blk_loop.state_u.stack.basesp; |
| 2257 | /* pre-extend stack so pp_iter doesn't have to check every time |
| 2258 | * it pushes yes/no */ |
| 2259 | EXTEND(SP, 1); |
| 2260 | } |
| 2261 | |
| 2262 | RETURN; |
| 2263 | } |
| 2264 | |
| 2265 | PP(pp_enterloop) |
| 2266 | { |
| 2267 | PERL_CONTEXT *cx; |
| 2268 | const U8 gimme = GIMME_V; |
| 2269 | |
| 2270 | cx = cx_pushblock(CXt_LOOP_PLAIN, gimme, PL_stack_sp, PL_savestack_ix); |
| 2271 | cx_pushloop_plain(cx); |
| 2272 | return NORMAL; |
| 2273 | } |
| 2274 | |
| 2275 | |
| 2276 | PP(pp_leaveloop) |
| 2277 | { |
| 2278 | PERL_CONTEXT *cx; |
| 2279 | U8 gimme; |
| 2280 | SV **base; |
| 2281 | SV **oldsp; |
| 2282 | |
| 2283 | cx = CX_CUR(); |
| 2284 | assert(CxTYPE_is_LOOP(cx)); |
| 2285 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 2286 | base = CxTYPE(cx) == CXt_LOOP_LIST |
| 2287 | ? PL_stack_base + cx->blk_loop.state_u.stack.basesp |
| 2288 | : oldsp; |
| 2289 | gimme = cx->blk_gimme; |
| 2290 | |
| 2291 | if (gimme == G_VOID) |
| 2292 | PL_stack_sp = base; |
| 2293 | else |
| 2294 | leave_adjust_stacks(oldsp, base, gimme, |
| 2295 | PL_op->op_private & OPpLVALUE ? 3 : 1); |
| 2296 | |
| 2297 | CX_LEAVE_SCOPE(cx); |
| 2298 | cx_poploop(cx); /* Stack values are safe: release loop vars ... */ |
| 2299 | cx_popblock(cx); |
| 2300 | CX_POP(cx); |
| 2301 | |
| 2302 | return NORMAL; |
| 2303 | } |
| 2304 | |
| 2305 | |
| 2306 | /* This duplicates most of pp_leavesub, but with additional code to handle |
| 2307 | * return args in lvalue context. It was forked from pp_leavesub to |
| 2308 | * avoid slowing down that function any further. |
| 2309 | * |
| 2310 | * Any changes made to this function may need to be copied to pp_leavesub |
| 2311 | * and vice-versa. |
| 2312 | * |
| 2313 | * also tail-called by pp_return |
| 2314 | */ |
| 2315 | |
| 2316 | PP(pp_leavesublv) |
| 2317 | { |
| 2318 | U8 gimme; |
| 2319 | PERL_CONTEXT *cx; |
| 2320 | SV **oldsp; |
| 2321 | OP *retop; |
| 2322 | |
| 2323 | cx = CX_CUR(); |
| 2324 | assert(CxTYPE(cx) == CXt_SUB); |
| 2325 | |
| 2326 | if (CxMULTICALL(cx)) { |
| 2327 | /* entry zero of a stack is always PL_sv_undef, which |
| 2328 | * simplifies converting a '()' return into undef in scalar context */ |
| 2329 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); |
| 2330 | return 0; |
| 2331 | } |
| 2332 | |
| 2333 | gimme = cx->blk_gimme; |
| 2334 | oldsp = PL_stack_base + cx->blk_oldsp; /* last arg of previous frame */ |
| 2335 | |
| 2336 | if (gimme == G_VOID) |
| 2337 | PL_stack_sp = oldsp; |
| 2338 | else { |
| 2339 | U8 lval = CxLVAL(cx); |
| 2340 | bool is_lval = (lval && !(lval & OPpENTERSUB_INARGS)); |
| 2341 | const char *what = NULL; |
| 2342 | |
| 2343 | if (gimme == G_SCALAR) { |
| 2344 | if (is_lval) { |
| 2345 | /* check for bad return arg */ |
| 2346 | if (oldsp < PL_stack_sp) { |
| 2347 | SV *sv = *PL_stack_sp; |
| 2348 | if ((SvPADTMP(sv) || SvREADONLY(sv))) { |
| 2349 | what = |
| 2350 | SvREADONLY(sv) ? (sv == &PL_sv_undef) ? "undef" |
| 2351 | : "a readonly value" : "a temporary"; |
| 2352 | } |
| 2353 | else goto ok; |
| 2354 | } |
| 2355 | else { |
| 2356 | /* sub:lvalue{} will take us here. */ |
| 2357 | what = "undef"; |
| 2358 | } |
| 2359 | croak: |
| 2360 | Perl_croak(aTHX_ |
| 2361 | "Can't return %s from lvalue subroutine", what); |
| 2362 | } |
| 2363 | |
| 2364 | ok: |
| 2365 | leave_adjust_stacks(oldsp, oldsp, gimme, is_lval ? 3 : 2); |
| 2366 | |
| 2367 | if (lval & OPpDEREF) { |
| 2368 | /* lval_sub()->{...} and similar */ |
| 2369 | dSP; |
| 2370 | SvGETMAGIC(TOPs); |
| 2371 | if (!SvOK(TOPs)) { |
| 2372 | TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF); |
| 2373 | } |
| 2374 | PUTBACK; |
| 2375 | } |
| 2376 | } |
| 2377 | else { |
| 2378 | assert(gimme == G_ARRAY); |
| 2379 | assert (!(lval & OPpDEREF)); |
| 2380 | |
| 2381 | if (is_lval) { |
| 2382 | /* scan for bad return args */ |
| 2383 | SV **p; |
| 2384 | for (p = PL_stack_sp; p > oldsp; p--) { |
| 2385 | SV *sv = *p; |
| 2386 | /* the PL_sv_undef exception is to allow things like |
| 2387 | * this to work, where PL_sv_undef acts as 'skip' |
| 2388 | * placeholder on the LHS of list assigns: |
| 2389 | * sub foo :lvalue { undef } |
| 2390 | * ($a, undef, foo(), $b) = 1..4; |
| 2391 | */ |
| 2392 | if (sv != &PL_sv_undef && (SvPADTMP(sv) || SvREADONLY(sv))) |
| 2393 | { |
| 2394 | /* Might be flattened array after $#array = */ |
| 2395 | what = SvREADONLY(sv) |
| 2396 | ? "a readonly value" : "a temporary"; |
| 2397 | goto croak; |
| 2398 | } |
| 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | leave_adjust_stacks(oldsp, oldsp, gimme, is_lval ? 3 : 2); |
| 2403 | } |
| 2404 | } |
| 2405 | |
| 2406 | CX_LEAVE_SCOPE(cx); |
| 2407 | cx_popsub(cx); /* Stack values are safe: release CV and @_ ... */ |
| 2408 | cx_popblock(cx); |
| 2409 | retop = cx->blk_sub.retop; |
| 2410 | CX_POP(cx); |
| 2411 | |
| 2412 | return retop; |
| 2413 | } |
| 2414 | |
| 2415 | |
| 2416 | PP(pp_return) |
| 2417 | { |
| 2418 | dSP; dMARK; |
| 2419 | PERL_CONTEXT *cx; |
| 2420 | const I32 cxix = dopoptosub(cxstack_ix); |
| 2421 | |
| 2422 | assert(cxstack_ix >= 0); |
| 2423 | if (cxix < cxstack_ix) { |
| 2424 | if (cxix < 0) { |
| 2425 | if (!( PL_curstackinfo->si_type == PERLSI_SORT |
| 2426 | || ( PL_curstackinfo->si_type == PERLSI_MULTICALL |
| 2427 | && (cxstack[0].cx_type & CXp_SUB_RE_FAKE)) |
| 2428 | ) |
| 2429 | ) |
| 2430 | DIE(aTHX_ "Can't return outside a subroutine"); |
| 2431 | /* We must be in: |
| 2432 | * a sort block, which is a CXt_NULL not a CXt_SUB; |
| 2433 | * or a /(?{...})/ block. |
| 2434 | * Handle specially. */ |
| 2435 | assert(CxTYPE(&cxstack[0]) == CXt_NULL |
| 2436 | || ( CxTYPE(&cxstack[0]) == CXt_SUB |
| 2437 | && (cxstack[0].cx_type & CXp_SUB_RE_FAKE))); |
| 2438 | if (cxstack_ix > 0) { |
| 2439 | /* See comment below about context popping. Since we know |
| 2440 | * we're scalar and not lvalue, we can preserve the return |
| 2441 | * value in a simpler fashion than there. */ |
| 2442 | SV *sv = *SP; |
| 2443 | assert(cxstack[0].blk_gimme == G_SCALAR); |
| 2444 | if ( (sp != PL_stack_base) |
| 2445 | && !(SvFLAGS(sv) & (SVs_TEMP|SVs_PADTMP)) |
| 2446 | ) |
| 2447 | *SP = sv_mortalcopy(sv); |
| 2448 | dounwind(0); |
| 2449 | } |
| 2450 | /* caller responsible for popping cxstack[0] */ |
| 2451 | return 0; |
| 2452 | } |
| 2453 | |
| 2454 | /* There are contexts that need popping. Doing this may free the |
| 2455 | * return value(s), so preserve them first: e.g. popping the plain |
| 2456 | * loop here would free $x: |
| 2457 | * sub f { { my $x = 1; return $x } } |
| 2458 | * We may also need to shift the args down; for example, |
| 2459 | * for (1,2) { return 3,4 } |
| 2460 | * leaves 1,2,3,4 on the stack. Both these actions will be done by |
| 2461 | * leave_adjust_stacks(), along with freeing any temps. Note that |
| 2462 | * whoever we tail-call (e.g. pp_leaveeval) will also call |
| 2463 | * leave_adjust_stacks(); however, the second call is likely to |
| 2464 | * just see a bunch of SvTEMPs with a ref count of 1, and so just |
| 2465 | * pass them through, rather than copying them again. So this |
| 2466 | * isn't as inefficient as it sounds. |
| 2467 | */ |
| 2468 | cx = &cxstack[cxix]; |
| 2469 | PUTBACK; |
| 2470 | if (cx->blk_gimme != G_VOID) |
| 2471 | leave_adjust_stacks(MARK, PL_stack_base + cx->blk_oldsp, |
| 2472 | cx->blk_gimme, |
| 2473 | CxTYPE(cx) == CXt_SUB && CvLVALUE(cx->blk_sub.cv) |
| 2474 | ? 3 : 0); |
| 2475 | SPAGAIN; |
| 2476 | dounwind(cxix); |
| 2477 | cx = &cxstack[cxix]; /* CX stack may have been realloced */ |
| 2478 | } |
| 2479 | else { |
| 2480 | /* Like in the branch above, we need to handle any extra junk on |
| 2481 | * the stack. But because we're not also popping extra contexts, we |
| 2482 | * don't have to worry about prematurely freeing args. So we just |
| 2483 | * need to do the bare minimum to handle junk, and leave the main |
| 2484 | * arg processing in the function we tail call, e.g. pp_leavesub. |
| 2485 | * In list context we have to splice out the junk; in scalar |
| 2486 | * context we can leave as-is (pp_leavesub will later return the |
| 2487 | * top stack element). But for an empty arg list, e.g. |
| 2488 | * for (1,2) { return } |
| 2489 | * we need to set sp = oldsp so that pp_leavesub knows to push |
| 2490 | * &PL_sv_undef onto the stack. |
| 2491 | */ |
| 2492 | SV **oldsp; |
| 2493 | cx = &cxstack[cxix]; |
| 2494 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 2495 | if (oldsp != MARK) { |
| 2496 | SSize_t nargs = SP - MARK; |
| 2497 | if (nargs) { |
| 2498 | if (cx->blk_gimme == G_ARRAY) { |
| 2499 | /* shift return args to base of call stack frame */ |
| 2500 | Move(MARK + 1, oldsp + 1, nargs, SV*); |
| 2501 | PL_stack_sp = oldsp + nargs; |
| 2502 | } |
| 2503 | } |
| 2504 | else |
| 2505 | PL_stack_sp = oldsp; |
| 2506 | } |
| 2507 | } |
| 2508 | |
| 2509 | /* fall through to a normal exit */ |
| 2510 | switch (CxTYPE(cx)) { |
| 2511 | case CXt_EVAL: |
| 2512 | return CxTRYBLOCK(cx) |
| 2513 | ? Perl_pp_leavetry(aTHX) |
| 2514 | : Perl_pp_leaveeval(aTHX); |
| 2515 | case CXt_SUB: |
| 2516 | return CvLVALUE(cx->blk_sub.cv) |
| 2517 | ? Perl_pp_leavesublv(aTHX) |
| 2518 | : Perl_pp_leavesub(aTHX); |
| 2519 | case CXt_FORMAT: |
| 2520 | return Perl_pp_leavewrite(aTHX); |
| 2521 | default: |
| 2522 | DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx)); |
| 2523 | } |
| 2524 | } |
| 2525 | |
| 2526 | /* find the enclosing loop or labelled loop and dounwind() back to it. */ |
| 2527 | |
| 2528 | static PERL_CONTEXT * |
| 2529 | S_unwind_loop(pTHX) |
| 2530 | { |
| 2531 | I32 cxix; |
| 2532 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 2533 | cxix = dopoptoloop(cxstack_ix); |
| 2534 | if (cxix < 0) |
| 2535 | /* diag_listed_as: Can't "last" outside a loop block */ |
| 2536 | Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", |
| 2537 | OP_NAME(PL_op)); |
| 2538 | } |
| 2539 | else { |
| 2540 | dSP; |
| 2541 | STRLEN label_len; |
| 2542 | const char * const label = |
| 2543 | PL_op->op_flags & OPf_STACKED |
| 2544 | ? SvPV(TOPs,label_len) |
| 2545 | : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv); |
| 2546 | const U32 label_flags = |
| 2547 | PL_op->op_flags & OPf_STACKED |
| 2548 | ? SvUTF8(POPs) |
| 2549 | : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0; |
| 2550 | PUTBACK; |
| 2551 | cxix = dopoptolabel(label, label_len, label_flags); |
| 2552 | if (cxix < 0) |
| 2553 | /* diag_listed_as: Label not found for "last %s" */ |
| 2554 | Perl_croak(aTHX_ "Label not found for \"%s %" SVf "\"", |
| 2555 | OP_NAME(PL_op), |
| 2556 | SVfARG(PL_op->op_flags & OPf_STACKED |
| 2557 | && !SvGMAGICAL(TOPp1s) |
| 2558 | ? TOPp1s |
| 2559 | : newSVpvn_flags(label, |
| 2560 | label_len, |
| 2561 | label_flags | SVs_TEMP))); |
| 2562 | } |
| 2563 | if (cxix < cxstack_ix) |
| 2564 | dounwind(cxix); |
| 2565 | return &cxstack[cxix]; |
| 2566 | } |
| 2567 | |
| 2568 | |
| 2569 | PP(pp_last) |
| 2570 | { |
| 2571 | PERL_CONTEXT *cx; |
| 2572 | OP* nextop; |
| 2573 | |
| 2574 | cx = S_unwind_loop(aTHX); |
| 2575 | |
| 2576 | assert(CxTYPE_is_LOOP(cx)); |
| 2577 | PL_stack_sp = PL_stack_base |
| 2578 | + (CxTYPE(cx) == CXt_LOOP_LIST |
| 2579 | ? cx->blk_loop.state_u.stack.basesp |
| 2580 | : cx->blk_oldsp |
| 2581 | ); |
| 2582 | |
| 2583 | TAINT_NOT; |
| 2584 | |
| 2585 | /* Stack values are safe: */ |
| 2586 | CX_LEAVE_SCOPE(cx); |
| 2587 | cx_poploop(cx); /* release loop vars ... */ |
| 2588 | cx_popblock(cx); |
| 2589 | nextop = cx->blk_loop.my_op->op_lastop->op_next; |
| 2590 | CX_POP(cx); |
| 2591 | |
| 2592 | return nextop; |
| 2593 | } |
| 2594 | |
| 2595 | PP(pp_next) |
| 2596 | { |
| 2597 | PERL_CONTEXT *cx; |
| 2598 | |
| 2599 | /* if not a bare 'next' in the main scope, search for it */ |
| 2600 | cx = CX_CUR(); |
| 2601 | if (!((PL_op->op_flags & OPf_SPECIAL) && CxTYPE_is_LOOP(cx))) |
| 2602 | cx = S_unwind_loop(aTHX); |
| 2603 | |
| 2604 | cx_topblock(cx); |
| 2605 | PL_curcop = cx->blk_oldcop; |
| 2606 | PERL_ASYNC_CHECK(); |
| 2607 | return (cx)->blk_loop.my_op->op_nextop; |
| 2608 | } |
| 2609 | |
| 2610 | PP(pp_redo) |
| 2611 | { |
| 2612 | PERL_CONTEXT *cx = S_unwind_loop(aTHX); |
| 2613 | OP* redo_op = cx->blk_loop.my_op->op_redoop; |
| 2614 | |
| 2615 | if (redo_op->op_type == OP_ENTER) { |
| 2616 | /* pop one less context to avoid $x being freed in while (my $x..) */ |
| 2617 | cxstack_ix++; |
| 2618 | cx = CX_CUR(); |
| 2619 | assert(CxTYPE(cx) == CXt_BLOCK); |
| 2620 | redo_op = redo_op->op_next; |
| 2621 | } |
| 2622 | |
| 2623 | FREETMPS; |
| 2624 | CX_LEAVE_SCOPE(cx); |
| 2625 | cx_topblock(cx); |
| 2626 | PL_curcop = cx->blk_oldcop; |
| 2627 | PERL_ASYNC_CHECK(); |
| 2628 | return redo_op; |
| 2629 | } |
| 2630 | |
| 2631 | STATIC OP * |
| 2632 | S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit) |
| 2633 | { |
| 2634 | OP **ops = opstack; |
| 2635 | static const char* const too_deep = "Target of goto is too deeply nested"; |
| 2636 | |
| 2637 | PERL_ARGS_ASSERT_DOFINDLABEL; |
| 2638 | |
| 2639 | if (ops >= oplimit) |
| 2640 | Perl_croak(aTHX_ "%s", too_deep); |
| 2641 | if (o->op_type == OP_LEAVE || |
| 2642 | o->op_type == OP_SCOPE || |
| 2643 | o->op_type == OP_LEAVELOOP || |
| 2644 | o->op_type == OP_LEAVESUB || |
| 2645 | o->op_type == OP_LEAVETRY) |
| 2646 | { |
| 2647 | *ops++ = cUNOPo->op_first; |
| 2648 | if (ops >= oplimit) |
| 2649 | Perl_croak(aTHX_ "%s", too_deep); |
| 2650 | } |
| 2651 | *ops = 0; |
| 2652 | if (o->op_flags & OPf_KIDS) { |
| 2653 | OP *kid; |
| 2654 | /* First try all the kids at this level, since that's likeliest. */ |
| 2655 | for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) { |
| 2656 | if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { |
| 2657 | STRLEN kid_label_len; |
| 2658 | U32 kid_label_flags; |
| 2659 | const char *kid_label = CopLABEL_len_flags(kCOP, |
| 2660 | &kid_label_len, &kid_label_flags); |
| 2661 | if (kid_label && ( |
| 2662 | ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ? |
| 2663 | (flags & SVf_UTF8) |
| 2664 | ? (bytes_cmp_utf8( |
| 2665 | (const U8*)kid_label, kid_label_len, |
| 2666 | (const U8*)label, len) == 0) |
| 2667 | : (bytes_cmp_utf8( |
| 2668 | (const U8*)label, len, |
| 2669 | (const U8*)kid_label, kid_label_len) == 0) |
| 2670 | : ( len == kid_label_len && ((kid_label == label) |
| 2671 | || memEQ(kid_label, label, len))))) |
| 2672 | return kid; |
| 2673 | } |
| 2674 | } |
| 2675 | for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) { |
| 2676 | if (kid == PL_lastgotoprobe) |
| 2677 | continue; |
| 2678 | if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { |
| 2679 | if (ops == opstack) |
| 2680 | *ops++ = kid; |
| 2681 | else if (ops[-1]->op_type == OP_NEXTSTATE || |
| 2682 | ops[-1]->op_type == OP_DBSTATE) |
| 2683 | ops[-1] = kid; |
| 2684 | else |
| 2685 | *ops++ = kid; |
| 2686 | } |
| 2687 | if ((o = dofindlabel(kid, label, len, flags, ops, oplimit))) |
| 2688 | return o; |
| 2689 | } |
| 2690 | } |
| 2691 | *ops = 0; |
| 2692 | return 0; |
| 2693 | } |
| 2694 | |
| 2695 | |
| 2696 | /* also used for: pp_dump() */ |
| 2697 | |
| 2698 | PP(pp_goto) |
| 2699 | { |
| 2700 | dVAR; dSP; |
| 2701 | OP *retop = NULL; |
| 2702 | I32 ix; |
| 2703 | PERL_CONTEXT *cx; |
| 2704 | #define GOTO_DEPTH 64 |
| 2705 | OP *enterops[GOTO_DEPTH]; |
| 2706 | const char *label = NULL; |
| 2707 | STRLEN label_len = 0; |
| 2708 | U32 label_flags = 0; |
| 2709 | const bool do_dump = (PL_op->op_type == OP_DUMP); |
| 2710 | static const char* const must_have_label = "goto must have label"; |
| 2711 | |
| 2712 | if (PL_op->op_flags & OPf_STACKED) { |
| 2713 | /* goto EXPR or goto &foo */ |
| 2714 | |
| 2715 | SV * const sv = POPs; |
| 2716 | SvGETMAGIC(sv); |
| 2717 | |
| 2718 | if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) { |
| 2719 | /* This egregious kludge implements goto &subroutine */ |
| 2720 | I32 cxix; |
| 2721 | PERL_CONTEXT *cx; |
| 2722 | CV *cv = MUTABLE_CV(SvRV(sv)); |
| 2723 | AV *arg = GvAV(PL_defgv); |
| 2724 | |
| 2725 | while (!CvROOT(cv) && !CvXSUB(cv)) { |
| 2726 | const GV * const gv = CvGV(cv); |
| 2727 | if (gv) { |
| 2728 | GV *autogv; |
| 2729 | SV *tmpstr; |
| 2730 | /* autoloaded stub? */ |
| 2731 | if (cv != GvCV(gv) && (cv = GvCV(gv))) |
| 2732 | continue; |
| 2733 | autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), |
| 2734 | GvNAMELEN(gv), |
| 2735 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0); |
| 2736 | if (autogv && (cv = GvCV(autogv))) |
| 2737 | continue; |
| 2738 | tmpstr = sv_newmortal(); |
| 2739 | gv_efullname3(tmpstr, gv, NULL); |
| 2740 | DIE(aTHX_ "Goto undefined subroutine &%" SVf, SVfARG(tmpstr)); |
| 2741 | } |
| 2742 | DIE(aTHX_ "Goto undefined subroutine"); |
| 2743 | } |
| 2744 | |
| 2745 | cxix = dopoptosub(cxstack_ix); |
| 2746 | if (cxix < 0) { |
| 2747 | DIE(aTHX_ "Can't goto subroutine outside a subroutine"); |
| 2748 | } |
| 2749 | cx = &cxstack[cxix]; |
| 2750 | /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */ |
| 2751 | if (CxTYPE(cx) == CXt_EVAL) { |
| 2752 | if (CxREALEVAL(cx)) |
| 2753 | /* diag_listed_as: Can't goto subroutine from an eval-%s */ |
| 2754 | DIE(aTHX_ "Can't goto subroutine from an eval-string"); |
| 2755 | else |
| 2756 | /* diag_listed_as: Can't goto subroutine from an eval-%s */ |
| 2757 | DIE(aTHX_ "Can't goto subroutine from an eval-block"); |
| 2758 | } |
| 2759 | else if (CxMULTICALL(cx)) |
| 2760 | DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)"); |
| 2761 | |
| 2762 | /* First do some returnish stuff. */ |
| 2763 | |
| 2764 | SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */ |
| 2765 | FREETMPS; |
| 2766 | if (cxix < cxstack_ix) { |
| 2767 | dounwind(cxix); |
| 2768 | } |
| 2769 | cx = CX_CUR(); |
| 2770 | cx_topblock(cx); |
| 2771 | SPAGAIN; |
| 2772 | |
| 2773 | /* protect @_ during save stack unwind. */ |
| 2774 | if (arg) |
| 2775 | SvREFCNT_inc_NN(sv_2mortal(MUTABLE_SV(arg))); |
| 2776 | |
| 2777 | assert(PL_scopestack_ix == cx->blk_oldscopesp); |
| 2778 | CX_LEAVE_SCOPE(cx); |
| 2779 | |
| 2780 | if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) { |
| 2781 | /* this is part of cx_popsub_args() */ |
| 2782 | AV* av = MUTABLE_AV(PAD_SVl(0)); |
| 2783 | assert(AvARRAY(MUTABLE_AV( |
| 2784 | PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ |
| 2785 | CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); |
| 2786 | |
| 2787 | /* we are going to donate the current @_ from the old sub |
| 2788 | * to the new sub. This first part of the donation puts a |
| 2789 | * new empty AV in the pad[0] slot of the old sub, |
| 2790 | * unless pad[0] and @_ differ (e.g. if the old sub did |
| 2791 | * local *_ = []); in which case clear the old pad[0] |
| 2792 | * array in the usual way */ |
| 2793 | if (av == arg || AvREAL(av)) |
| 2794 | clear_defarray(av, av == arg); |
| 2795 | else CLEAR_ARGARRAY(av); |
| 2796 | } |
| 2797 | |
| 2798 | /* don't restore PL_comppad here. It won't be needed if the |
| 2799 | * sub we're going to is non-XS, but restoring it early then |
| 2800 | * croaking (e.g. the "Goto undefined subroutine" below) |
| 2801 | * means the CX block gets processed again in dounwind, |
| 2802 | * but this time with the wrong PL_comppad */ |
| 2803 | |
| 2804 | /* A destructor called during LEAVE_SCOPE could have undefined |
| 2805 | * our precious cv. See bug #99850. */ |
| 2806 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
| 2807 | const GV * const gv = CvGV(cv); |
| 2808 | if (gv) { |
| 2809 | SV * const tmpstr = sv_newmortal(); |
| 2810 | gv_efullname3(tmpstr, gv, NULL); |
| 2811 | DIE(aTHX_ "Goto undefined subroutine &%" SVf, |
| 2812 | SVfARG(tmpstr)); |
| 2813 | } |
| 2814 | DIE(aTHX_ "Goto undefined subroutine"); |
| 2815 | } |
| 2816 | |
| 2817 | if (CxTYPE(cx) == CXt_SUB) { |
| 2818 | CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth; |
| 2819 | SvREFCNT_dec_NN(cx->blk_sub.cv); |
| 2820 | } |
| 2821 | |
| 2822 | /* Now do some callish stuff. */ |
| 2823 | if (CvISXSUB(cv)) { |
| 2824 | const SSize_t items = arg ? AvFILL(arg) + 1 : 0; |
| 2825 | const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0; |
| 2826 | SV** mark; |
| 2827 | |
| 2828 | ENTER; |
| 2829 | SAVETMPS; |
| 2830 | SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */ |
| 2831 | |
| 2832 | /* put GvAV(defgv) back onto stack */ |
| 2833 | if (items) { |
| 2834 | EXTEND(SP, items+1); /* @_ could have been extended. */ |
| 2835 | } |
| 2836 | mark = SP; |
| 2837 | if (items) { |
| 2838 | SSize_t index; |
| 2839 | bool r = cBOOL(AvREAL(arg)); |
| 2840 | for (index=0; index<items; index++) |
| 2841 | { |
| 2842 | SV *sv; |
| 2843 | if (m) { |
| 2844 | SV ** const svp = av_fetch(arg, index, 0); |
| 2845 | sv = svp ? *svp : NULL; |
| 2846 | } |
| 2847 | else sv = AvARRAY(arg)[index]; |
| 2848 | SP[index+1] = sv |
| 2849 | ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv |
| 2850 | : sv_2mortal(newSVavdefelem(arg, index, 1)); |
| 2851 | } |
| 2852 | } |
| 2853 | SP += items; |
| 2854 | if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) { |
| 2855 | /* Restore old @_ */ |
| 2856 | CX_POP_SAVEARRAY(cx); |
| 2857 | } |
| 2858 | |
| 2859 | retop = cx->blk_sub.retop; |
| 2860 | PL_comppad = cx->blk_sub.prevcomppad; |
| 2861 | PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; |
| 2862 | |
| 2863 | /* XS subs don't have a CXt_SUB, so pop it; |
| 2864 | * this is a cx_popblock(), less all the stuff we already did |
| 2865 | * for cx_topblock() earlier */ |
| 2866 | PL_curcop = cx->blk_oldcop; |
| 2867 | CX_POP(cx); |
| 2868 | |
| 2869 | /* Push a mark for the start of arglist */ |
| 2870 | PUSHMARK(mark); |
| 2871 | PUTBACK; |
| 2872 | (void)(*CvXSUB(cv))(aTHX_ cv); |
| 2873 | LEAVE; |
| 2874 | goto _return; |
| 2875 | } |
| 2876 | else { |
| 2877 | PADLIST * const padlist = CvPADLIST(cv); |
| 2878 | |
| 2879 | SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */ |
| 2880 | |
| 2881 | /* partial unrolled cx_pushsub(): */ |
| 2882 | |
| 2883 | cx->blk_sub.cv = cv; |
| 2884 | cx->blk_sub.olddepth = CvDEPTH(cv); |
| 2885 | |
| 2886 | CvDEPTH(cv)++; |
| 2887 | SvREFCNT_inc_simple_void_NN(cv); |
| 2888 | if (CvDEPTH(cv) > 1) { |
| 2889 | if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION)) |
| 2890 | sub_crush_depth(cv); |
| 2891 | pad_push(padlist, CvDEPTH(cv)); |
| 2892 | } |
| 2893 | PL_curcop = cx->blk_oldcop; |
| 2894 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); |
| 2895 | if (CxHASARGS(cx)) |
| 2896 | { |
| 2897 | /* second half of donating @_ from the old sub to the |
| 2898 | * new sub: abandon the original pad[0] AV in the |
| 2899 | * new sub, and replace it with the donated @_. |
| 2900 | * pad[0] takes ownership of the extra refcount |
| 2901 | * we gave arg earlier */ |
| 2902 | if (arg) { |
| 2903 | SvREFCNT_dec(PAD_SVl(0)); |
| 2904 | PAD_SVl(0) = (SV *)arg; |
| 2905 | SvREFCNT_inc_simple_void_NN(arg); |
| 2906 | } |
| 2907 | |
| 2908 | /* GvAV(PL_defgv) might have been modified on scope |
| 2909 | exit, so point it at arg again. */ |
| 2910 | if (arg != GvAV(PL_defgv)) { |
| 2911 | AV * const av = GvAV(PL_defgv); |
| 2912 | GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg); |
| 2913 | SvREFCNT_dec(av); |
| 2914 | } |
| 2915 | } |
| 2916 | |
| 2917 | if (PERLDB_SUB) { /* Checking curstash breaks DProf. */ |
| 2918 | Perl_get_db_sub(aTHX_ NULL, cv); |
| 2919 | if (PERLDB_GOTO) { |
| 2920 | CV * const gotocv = get_cvs("DB::goto", 0); |
| 2921 | if (gotocv) { |
| 2922 | PUSHMARK( PL_stack_sp ); |
| 2923 | call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG); |
| 2924 | PL_stack_sp--; |
| 2925 | } |
| 2926 | } |
| 2927 | } |
| 2928 | retop = CvSTART(cv); |
| 2929 | goto putback_return; |
| 2930 | } |
| 2931 | } |
| 2932 | else { |
| 2933 | /* goto EXPR */ |
| 2934 | label = SvPV_nomg_const(sv, label_len); |
| 2935 | label_flags = SvUTF8(sv); |
| 2936 | } |
| 2937 | } |
| 2938 | else if (!(PL_op->op_flags & OPf_SPECIAL)) { |
| 2939 | /* goto LABEL or dump LABEL */ |
| 2940 | label = cPVOP->op_pv; |
| 2941 | label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0; |
| 2942 | label_len = strlen(label); |
| 2943 | } |
| 2944 | if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label); |
| 2945 | |
| 2946 | PERL_ASYNC_CHECK(); |
| 2947 | |
| 2948 | if (label_len) { |
| 2949 | OP *gotoprobe = NULL; |
| 2950 | bool leaving_eval = FALSE; |
| 2951 | bool in_block = FALSE; |
| 2952 | bool pseudo_block = FALSE; |
| 2953 | PERL_CONTEXT *last_eval_cx = NULL; |
| 2954 | |
| 2955 | /* find label */ |
| 2956 | |
| 2957 | PL_lastgotoprobe = NULL; |
| 2958 | *enterops = 0; |
| 2959 | for (ix = cxstack_ix; ix >= 0; ix--) { |
| 2960 | cx = &cxstack[ix]; |
| 2961 | switch (CxTYPE(cx)) { |
| 2962 | case CXt_EVAL: |
| 2963 | leaving_eval = TRUE; |
| 2964 | if (!CxTRYBLOCK(cx)) { |
| 2965 | gotoprobe = (last_eval_cx ? |
| 2966 | last_eval_cx->blk_eval.old_eval_root : |
| 2967 | PL_eval_root); |
| 2968 | last_eval_cx = cx; |
| 2969 | break; |
| 2970 | } |
| 2971 | /* else fall through */ |
| 2972 | case CXt_LOOP_PLAIN: |
| 2973 | case CXt_LOOP_LAZYIV: |
| 2974 | case CXt_LOOP_LAZYSV: |
| 2975 | case CXt_LOOP_LIST: |
| 2976 | case CXt_LOOP_ARY: |
| 2977 | case CXt_GIVEN: |
| 2978 | case CXt_WHEN: |
| 2979 | gotoprobe = OpSIBLING(cx->blk_oldcop); |
| 2980 | break; |
| 2981 | case CXt_SUBST: |
| 2982 | continue; |
| 2983 | case CXt_BLOCK: |
| 2984 | if (ix) { |
| 2985 | gotoprobe = OpSIBLING(cx->blk_oldcop); |
| 2986 | in_block = TRUE; |
| 2987 | } else |
| 2988 | gotoprobe = PL_main_root; |
| 2989 | break; |
| 2990 | case CXt_SUB: |
| 2991 | gotoprobe = CvROOT(cx->blk_sub.cv); |
| 2992 | pseudo_block = cBOOL(CxMULTICALL(cx)); |
| 2993 | break; |
| 2994 | case CXt_FORMAT: |
| 2995 | case CXt_NULL: |
| 2996 | DIE(aTHX_ "Can't \"goto\" out of a pseudo block"); |
| 2997 | default: |
| 2998 | if (ix) |
| 2999 | DIE(aTHX_ "panic: goto, type=%u, ix=%ld", |
| 3000 | CxTYPE(cx), (long) ix); |
| 3001 | gotoprobe = PL_main_root; |
| 3002 | break; |
| 3003 | } |
| 3004 | if (gotoprobe) { |
| 3005 | OP *sibl1, *sibl2; |
| 3006 | |
| 3007 | retop = dofindlabel(gotoprobe, label, label_len, label_flags, |
| 3008 | enterops, enterops + GOTO_DEPTH); |
| 3009 | if (retop) |
| 3010 | break; |
| 3011 | if ( (sibl1 = OpSIBLING(gotoprobe)) && |
| 3012 | sibl1->op_type == OP_UNSTACK && |
| 3013 | (sibl2 = OpSIBLING(sibl1))) |
| 3014 | { |
| 3015 | retop = dofindlabel(sibl2, |
| 3016 | label, label_len, label_flags, enterops, |
| 3017 | enterops + GOTO_DEPTH); |
| 3018 | if (retop) |
| 3019 | break; |
| 3020 | } |
| 3021 | } |
| 3022 | if (pseudo_block) |
| 3023 | DIE(aTHX_ "Can't \"goto\" out of a pseudo block"); |
| 3024 | PL_lastgotoprobe = gotoprobe; |
| 3025 | } |
| 3026 | if (!retop) |
| 3027 | DIE(aTHX_ "Can't find label %" UTF8f, |
| 3028 | UTF8fARG(label_flags, label_len, label)); |
| 3029 | |
| 3030 | /* if we're leaving an eval, check before we pop any frames |
| 3031 | that we're not going to punt, otherwise the error |
| 3032 | won't be caught */ |
| 3033 | |
| 3034 | if (leaving_eval && *enterops && enterops[1]) { |
| 3035 | I32 i; |
| 3036 | for (i = 1; enterops[i]; i++) |
| 3037 | if (enterops[i]->op_type == OP_ENTERITER) |
| 3038 | DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop"); |
| 3039 | } |
| 3040 | |
| 3041 | if (*enterops && enterops[1]) { |
| 3042 | I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1; |
| 3043 | if (enterops[i]) |
| 3044 | deprecate("\"goto\" to jump into a construct"); |
| 3045 | } |
| 3046 | |
| 3047 | /* pop unwanted frames */ |
| 3048 | |
| 3049 | if (ix < cxstack_ix) { |
| 3050 | if (ix < 0) |
| 3051 | DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix); |
| 3052 | dounwind(ix); |
| 3053 | cx = CX_CUR(); |
| 3054 | cx_topblock(cx); |
| 3055 | } |
| 3056 | |
| 3057 | /* push wanted frames */ |
| 3058 | |
| 3059 | if (*enterops && enterops[1]) { |
| 3060 | OP * const oldop = PL_op; |
| 3061 | ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1; |
| 3062 | for (; enterops[ix]; ix++) { |
| 3063 | PL_op = enterops[ix]; |
| 3064 | /* Eventually we may want to stack the needed arguments |
| 3065 | * for each op. For now, we punt on the hard ones. */ |
| 3066 | if (PL_op->op_type == OP_ENTERITER) |
| 3067 | DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop"); |
| 3068 | PL_op->op_ppaddr(aTHX); |
| 3069 | } |
| 3070 | PL_op = oldop; |
| 3071 | } |
| 3072 | } |
| 3073 | |
| 3074 | if (do_dump) { |
| 3075 | #ifdef VMS |
| 3076 | if (!retop) retop = PL_main_start; |
| 3077 | #endif |
| 3078 | PL_restartop = retop; |
| 3079 | PL_do_undump = TRUE; |
| 3080 | |
| 3081 | my_unexec(); |
| 3082 | |
| 3083 | PL_restartop = 0; /* hmm, must be GNU unexec().. */ |
| 3084 | PL_do_undump = FALSE; |
| 3085 | } |
| 3086 | |
| 3087 | putback_return: |
| 3088 | PL_stack_sp = sp; |
| 3089 | _return: |
| 3090 | PERL_ASYNC_CHECK(); |
| 3091 | return retop; |
| 3092 | } |
| 3093 | |
| 3094 | PP(pp_exit) |
| 3095 | { |
| 3096 | dSP; |
| 3097 | I32 anum; |
| 3098 | |
| 3099 | if (MAXARG < 1) |
| 3100 | anum = 0; |
| 3101 | else if (!TOPs) { |
| 3102 | anum = 0; (void)POPs; |
| 3103 | } |
| 3104 | else { |
| 3105 | anum = SvIVx(POPs); |
| 3106 | #ifdef VMS |
| 3107 | if (anum == 1 |
| 3108 | && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0))) |
| 3109 | anum = 0; |
| 3110 | VMSISH_HUSHED = |
| 3111 | VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH); |
| 3112 | #endif |
| 3113 | } |
| 3114 | PL_exit_flags |= PERL_EXIT_EXPECTED; |
| 3115 | my_exit(anum); |
| 3116 | PUSHs(&PL_sv_undef); |
| 3117 | RETURN; |
| 3118 | } |
| 3119 | |
| 3120 | /* Eval. */ |
| 3121 | |
| 3122 | STATIC void |
| 3123 | S_save_lines(pTHX_ AV *array, SV *sv) |
| 3124 | { |
| 3125 | const char *s = SvPVX_const(sv); |
| 3126 | const char * const send = SvPVX_const(sv) + SvCUR(sv); |
| 3127 | I32 line = 1; |
| 3128 | |
| 3129 | PERL_ARGS_ASSERT_SAVE_LINES; |
| 3130 | |
| 3131 | while (s && s < send) { |
| 3132 | const char *t; |
| 3133 | SV * const tmpstr = newSV_type(SVt_PVMG); |
| 3134 | |
| 3135 | t = (const char *)memchr(s, '\n', send - s); |
| 3136 | if (t) |
| 3137 | t++; |
| 3138 | else |
| 3139 | t = send; |
| 3140 | |
| 3141 | sv_setpvn(tmpstr, s, t - s); |
| 3142 | av_store(array, line++, tmpstr); |
| 3143 | s = t; |
| 3144 | } |
| 3145 | } |
| 3146 | |
| 3147 | /* |
| 3148 | =for apidoc docatch |
| 3149 | |
| 3150 | Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context. |
| 3151 | |
| 3152 | 0 is used as continue inside eval, |
| 3153 | |
| 3154 | 3 is used for a die caught by an inner eval - continue inner loop |
| 3155 | |
| 3156 | See F<cop.h>: je_mustcatch, when set at any runlevel to TRUE, means eval ops must |
| 3157 | establish a local jmpenv to handle exception traps. |
| 3158 | |
| 3159 | =cut |
| 3160 | */ |
| 3161 | STATIC OP * |
| 3162 | S_docatch(pTHX_ OP *o) |
| 3163 | { |
| 3164 | int ret; |
| 3165 | OP * const oldop = PL_op; |
| 3166 | dJMPENV; |
| 3167 | |
| 3168 | #ifdef DEBUGGING |
| 3169 | assert(CATCH_GET == TRUE); |
| 3170 | #endif |
| 3171 | PL_op = o; |
| 3172 | |
| 3173 | JMPENV_PUSH(ret); |
| 3174 | switch (ret) { |
| 3175 | case 0: |
| 3176 | assert(cxstack_ix >= 0); |
| 3177 | assert(CxTYPE(CX_CUR()) == CXt_EVAL); |
| 3178 | CX_CUR()->blk_eval.cur_top_env = PL_top_env; |
| 3179 | redo_body: |
| 3180 | CALLRUNOPS(aTHX); |
| 3181 | break; |
| 3182 | case 3: |
| 3183 | /* die caught by an inner eval - continue inner loop */ |
| 3184 | if (PL_restartop && PL_restartjmpenv == PL_top_env) { |
| 3185 | PL_restartjmpenv = NULL; |
| 3186 | PL_op = PL_restartop; |
| 3187 | PL_restartop = 0; |
| 3188 | goto redo_body; |
| 3189 | } |
| 3190 | /* FALLTHROUGH */ |
| 3191 | default: |
| 3192 | JMPENV_POP; |
| 3193 | PL_op = oldop; |
| 3194 | JMPENV_JUMP(ret); |
| 3195 | NOT_REACHED; /* NOTREACHED */ |
| 3196 | } |
| 3197 | JMPENV_POP; |
| 3198 | PL_op = oldop; |
| 3199 | return NULL; |
| 3200 | } |
| 3201 | |
| 3202 | |
| 3203 | /* |
| 3204 | =for apidoc find_runcv |
| 3205 | |
| 3206 | Locate the CV corresponding to the currently executing sub or eval. |
| 3207 | If C<db_seqp> is non_null, skip CVs that are in the DB package and populate |
| 3208 | C<*db_seqp> with the cop sequence number at the point that the DB:: code was |
| 3209 | entered. (This allows debuggers to eval in the scope of the breakpoint |
| 3210 | rather than in the scope of the debugger itself.) |
| 3211 | |
| 3212 | =cut |
| 3213 | */ |
| 3214 | |
| 3215 | CV* |
| 3216 | Perl_find_runcv(pTHX_ U32 *db_seqp) |
| 3217 | { |
| 3218 | return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp); |
| 3219 | } |
| 3220 | |
| 3221 | /* If this becomes part of the API, it might need a better name. */ |
| 3222 | CV * |
| 3223 | Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp) |
| 3224 | { |
| 3225 | PERL_SI *si; |
| 3226 | int level = 0; |
| 3227 | |
| 3228 | if (db_seqp) |
| 3229 | *db_seqp = |
| 3230 | PL_curcop == &PL_compiling |
| 3231 | ? PL_cop_seqmax |
| 3232 | : PL_curcop->cop_seq; |
| 3233 | |
| 3234 | for (si = PL_curstackinfo; si; si = si->si_prev) { |
| 3235 | I32 ix; |
| 3236 | for (ix = si->si_cxix; ix >= 0; ix--) { |
| 3237 | const PERL_CONTEXT *cx = &(si->si_cxstack[ix]); |
| 3238 | CV *cv = NULL; |
| 3239 | if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { |
| 3240 | cv = cx->blk_sub.cv; |
| 3241 | /* skip DB:: code */ |
| 3242 | if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) { |
| 3243 | *db_seqp = cx->blk_oldcop->cop_seq; |
| 3244 | continue; |
| 3245 | } |
| 3246 | if (cx->cx_type & CXp_SUB_RE) |
| 3247 | continue; |
| 3248 | } |
| 3249 | else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx)) |
| 3250 | cv = cx->blk_eval.cv; |
| 3251 | if (cv) { |
| 3252 | switch (cond) { |
| 3253 | case FIND_RUNCV_padid_eq: |
| 3254 | if (!CvPADLIST(cv) |
| 3255 | || CvPADLIST(cv)->xpadl_id != (U32)arg) |
| 3256 | continue; |
| 3257 | return cv; |
| 3258 | case FIND_RUNCV_level_eq: |
| 3259 | if (level++ != arg) continue; |
| 3260 | /* GERONIMO! */ |
| 3261 | default: |
| 3262 | return cv; |
| 3263 | } |
| 3264 | } |
| 3265 | } |
| 3266 | } |
| 3267 | return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv; |
| 3268 | } |
| 3269 | |
| 3270 | |
| 3271 | /* Run yyparse() in a setjmp wrapper. Returns: |
| 3272 | * 0: yyparse() successful |
| 3273 | * 1: yyparse() failed |
| 3274 | * 3: yyparse() died |
| 3275 | */ |
| 3276 | STATIC int |
| 3277 | S_try_yyparse(pTHX_ int gramtype) |
| 3278 | { |
| 3279 | int ret; |
| 3280 | dJMPENV; |
| 3281 | |
| 3282 | assert(CxTYPE(CX_CUR()) == CXt_EVAL); |
| 3283 | JMPENV_PUSH(ret); |
| 3284 | switch (ret) { |
| 3285 | case 0: |
| 3286 | ret = yyparse(gramtype) ? 1 : 0; |
| 3287 | break; |
| 3288 | case 3: |
| 3289 | break; |
| 3290 | default: |
| 3291 | JMPENV_POP; |
| 3292 | JMPENV_JUMP(ret); |
| 3293 | NOT_REACHED; /* NOTREACHED */ |
| 3294 | } |
| 3295 | JMPENV_POP; |
| 3296 | return ret; |
| 3297 | } |
| 3298 | |
| 3299 | |
| 3300 | /* Compile a require/do or an eval ''. |
| 3301 | * |
| 3302 | * outside is the lexically enclosing CV (if any) that invoked us. |
| 3303 | * seq is the current COP scope value. |
| 3304 | * hh is the saved hints hash, if any. |
| 3305 | * |
| 3306 | * Returns a bool indicating whether the compile was successful; if so, |
| 3307 | * PL_eval_start contains the first op of the compiled code; otherwise, |
| 3308 | * pushes undef. |
| 3309 | * |
| 3310 | * This function is called from two places: pp_require and pp_entereval. |
| 3311 | * These can be distinguished by whether PL_op is entereval. |
| 3312 | */ |
| 3313 | |
| 3314 | STATIC bool |
| 3315 | S_doeval_compile(pTHX_ U8 gimme, CV* outside, U32 seq, HV *hh) |
| 3316 | { |
| 3317 | dSP; |
| 3318 | OP * const saveop = PL_op; |
| 3319 | bool clear_hints = saveop->op_type != OP_ENTEREVAL; |
| 3320 | COP * const oldcurcop = PL_curcop; |
| 3321 | bool in_require = (saveop->op_type == OP_REQUIRE); |
| 3322 | int yystatus; |
| 3323 | CV *evalcv; |
| 3324 | |
| 3325 | PL_in_eval = (in_require |
| 3326 | ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL)) |
| 3327 | : (EVAL_INEVAL | |
| 3328 | ((PL_op->op_private & OPpEVAL_RE_REPARSING) |
| 3329 | ? EVAL_RE_REPARSING : 0))); |
| 3330 | |
| 3331 | PUSHMARK(SP); |
| 3332 | |
| 3333 | evalcv = MUTABLE_CV(newSV_type(SVt_PVCV)); |
| 3334 | CvEVAL_on(evalcv); |
| 3335 | assert(CxTYPE(CX_CUR()) == CXt_EVAL); |
| 3336 | CX_CUR()->blk_eval.cv = evalcv; |
| 3337 | CX_CUR()->blk_gimme = gimme; |
| 3338 | |
| 3339 | CvOUTSIDE_SEQ(evalcv) = seq; |
| 3340 | CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
| 3341 | |
| 3342 | /* set up a scratch pad */ |
| 3343 | |
| 3344 | CvPADLIST_set(evalcv, pad_new(padnew_SAVE)); |
| 3345 | PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */ |
| 3346 | |
| 3347 | |
| 3348 | SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */ |
| 3349 | |
| 3350 | /* make sure we compile in the right package */ |
| 3351 | |
| 3352 | if (CopSTASH_ne(PL_curcop, PL_curstash)) { |
| 3353 | SAVEGENERICSV(PL_curstash); |
| 3354 | PL_curstash = (HV *)CopSTASH(PL_curcop); |
| 3355 | if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL; |
| 3356 | else SvREFCNT_inc_simple_void(PL_curstash); |
| 3357 | } |
| 3358 | /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */ |
| 3359 | SAVESPTR(PL_beginav); |
| 3360 | PL_beginav = newAV(); |
| 3361 | SAVEFREESV(PL_beginav); |
| 3362 | SAVESPTR(PL_unitcheckav); |
| 3363 | PL_unitcheckav = newAV(); |
| 3364 | SAVEFREESV(PL_unitcheckav); |
| 3365 | |
| 3366 | |
| 3367 | ENTER_with_name("evalcomp"); |
| 3368 | SAVESPTR(PL_compcv); |
| 3369 | PL_compcv = evalcv; |
| 3370 | |
| 3371 | /* try to compile it */ |
| 3372 | |
| 3373 | PL_eval_root = NULL; |
| 3374 | PL_curcop = &PL_compiling; |
| 3375 | if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL)) |
| 3376 | PL_in_eval |= EVAL_KEEPERR; |
| 3377 | else |
| 3378 | CLEAR_ERRSV(); |
| 3379 | |
| 3380 | SAVEHINTS(); |
| 3381 | if (clear_hints) { |
| 3382 | PL_hints = 0; |
| 3383 | hv_clear(GvHV(PL_hintgv)); |
| 3384 | } |
| 3385 | else { |
| 3386 | PL_hints = saveop->op_private & OPpEVAL_COPHH |
| 3387 | ? oldcurcop->cop_hints : (U32)saveop->op_targ; |
| 3388 | |
| 3389 | /* making 'use re eval' not be in scope when compiling the |
| 3390 | * qr/mabye_has_runtime_code_block/ ensures that we don't get |
| 3391 | * infinite recursion when S_has_runtime_code() gives a false |
| 3392 | * positive: the second time round, HINT_RE_EVAL isn't set so we |
| 3393 | * don't bother calling S_has_runtime_code() */ |
| 3394 | if (PL_in_eval & EVAL_RE_REPARSING) |
| 3395 | PL_hints &= ~HINT_RE_EVAL; |
| 3396 | |
| 3397 | if (hh) { |
| 3398 | /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */ |
| 3399 | SvREFCNT_dec(GvHV(PL_hintgv)); |
| 3400 | GvHV(PL_hintgv) = hh; |
| 3401 | } |
| 3402 | } |
| 3403 | SAVECOMPILEWARNINGS(); |
| 3404 | if (clear_hints) { |
| 3405 | if (PL_dowarn & G_WARN_ALL_ON) |
| 3406 | PL_compiling.cop_warnings = pWARN_ALL ; |
| 3407 | else if (PL_dowarn & G_WARN_ALL_OFF) |
| 3408 | PL_compiling.cop_warnings = pWARN_NONE ; |
| 3409 | else |
| 3410 | PL_compiling.cop_warnings = pWARN_STD ; |
| 3411 | } |
| 3412 | else { |
| 3413 | PL_compiling.cop_warnings = |
| 3414 | DUP_WARNINGS(oldcurcop->cop_warnings); |
| 3415 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
| 3416 | if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) { |
| 3417 | /* The label, if present, is the first entry on the chain. So rather |
| 3418 | than writing a blank label in front of it (which involves an |
| 3419 | allocation), just use the next entry in the chain. */ |
| 3420 | PL_compiling.cop_hints_hash |
| 3421 | = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next); |
| 3422 | /* Check the assumption that this removed the label. */ |
| 3423 | assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL); |
| 3424 | } |
| 3425 | else |
| 3426 | PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash); |
| 3427 | } |
| 3428 | |
| 3429 | CALL_BLOCK_HOOKS(bhk_eval, saveop); |
| 3430 | |
| 3431 | /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>, |
| 3432 | * so honour CATCH_GET and trap it here if necessary */ |
| 3433 | |
| 3434 | |
| 3435 | /* compile the code */ |
| 3436 | yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG); |
| 3437 | |
| 3438 | if (yystatus || PL_parser->error_count || !PL_eval_root) { |
| 3439 | PERL_CONTEXT *cx; |
| 3440 | SV *errsv; |
| 3441 | |
| 3442 | PL_op = saveop; |
| 3443 | /* note that if yystatus == 3, then the require/eval died during |
| 3444 | * compilation, so the EVAL CX block has already been popped, and |
| 3445 | * various vars restored */ |
| 3446 | if (yystatus != 3) { |
| 3447 | if (PL_eval_root) { |
| 3448 | op_free(PL_eval_root); |
| 3449 | PL_eval_root = NULL; |
| 3450 | } |
| 3451 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 3452 | cx = CX_CUR(); |
| 3453 | assert(CxTYPE(cx) == CXt_EVAL); |
| 3454 | /* pop the CXt_EVAL, and if was a require, croak */ |
| 3455 | S_pop_eval_context_maybe_croak(aTHX_ cx, ERRSV, 2); |
| 3456 | } |
| 3457 | |
| 3458 | /* die_unwind() re-croaks when in require, having popped the |
| 3459 | * require EVAL context. So we should never catch a require |
| 3460 | * exception here */ |
| 3461 | assert(!in_require); |
| 3462 | |
| 3463 | errsv = ERRSV; |
| 3464 | if (!*(SvPV_nolen_const(errsv))) |
| 3465 | sv_setpvs(errsv, "Compilation error"); |
| 3466 | |
| 3467 | if (gimme != G_ARRAY) PUSHs(&PL_sv_undef); |
| 3468 | PUTBACK; |
| 3469 | return FALSE; |
| 3470 | } |
| 3471 | |
| 3472 | /* Compilation successful. Now clean up */ |
| 3473 | |
| 3474 | LEAVE_with_name("evalcomp"); |
| 3475 | |
| 3476 | CopLINE_set(&PL_compiling, 0); |
| 3477 | SAVEFREEOP(PL_eval_root); |
| 3478 | cv_forget_slab(evalcv); |
| 3479 | |
| 3480 | DEBUG_x(dump_eval()); |
| 3481 | |
| 3482 | /* Register with debugger: */ |
| 3483 | if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) { |
| 3484 | CV * const cv = get_cvs("DB::postponed", 0); |
| 3485 | if (cv) { |
| 3486 | dSP; |
| 3487 | PUSHMARK(SP); |
| 3488 | XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling))); |
| 3489 | PUTBACK; |
| 3490 | call_sv(MUTABLE_SV(cv), G_DISCARD); |
| 3491 | } |
| 3492 | } |
| 3493 | |
| 3494 | if (PL_unitcheckav) { |
| 3495 | OP *es = PL_eval_start; |
| 3496 | call_list(PL_scopestack_ix, PL_unitcheckav); |
| 3497 | PL_eval_start = es; |
| 3498 | } |
| 3499 | |
| 3500 | CvDEPTH(evalcv) = 1; |
| 3501 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 3502 | PL_op = saveop; /* The caller may need it. */ |
| 3503 | PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */ |
| 3504 | |
| 3505 | PUTBACK; |
| 3506 | return TRUE; |
| 3507 | } |
| 3508 | |
| 3509 | |
| 3510 | STATIC PerlIO * |
| 3511 | S_check_type_and_open(pTHX_ SV *name) |
| 3512 | { |
| 3513 | Stat_t st; |
| 3514 | STRLEN len; |
| 3515 | PerlIO * retio; |
| 3516 | const char *p = SvPV_const(name, len); |
| 3517 | int st_rc; |
| 3518 | |
| 3519 | PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN; |
| 3520 | |
| 3521 | /* checking here captures a reasonable error message when |
| 3522 | * PERL_DISABLE_PMC is true, but when PMC checks are enabled, the |
| 3523 | * user gets a confusing message about looking for the .pmc file |
| 3524 | * rather than for the .pm file so do the check in S_doopen_pm when |
| 3525 | * PMC is on instead of here. S_doopen_pm calls this func. |
| 3526 | * This check prevents a \0 in @INC causing problems. |
| 3527 | */ |
| 3528 | #ifdef PERL_DISABLE_PMC |
| 3529 | if (!IS_SAFE_PATHNAME(p, len, "require")) |
| 3530 | return NULL; |
| 3531 | #endif |
| 3532 | |
| 3533 | /* on Win32 stat is expensive (it does an open() and close() twice and |
| 3534 | a couple other IO calls), the open will fail with a dir on its own with |
| 3535 | errno EACCES, so only do a stat to separate a dir from a real EACCES |
| 3536 | caused by user perms */ |
| 3537 | #ifndef WIN32 |
| 3538 | /* we use the value of errno later to see how stat() or open() failed. |
| 3539 | * We don't want it set if the stat succeeded but we still failed, |
| 3540 | * such as if the name exists, but is a directory */ |
| 3541 | errno = 0; |
| 3542 | |
| 3543 | st_rc = PerlLIO_stat(p, &st); |
| 3544 | |
| 3545 | if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) { |
| 3546 | return NULL; |
| 3547 | } |
| 3548 | #endif |
| 3549 | |
| 3550 | retio = PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name); |
| 3551 | #ifdef WIN32 |
| 3552 | /* EACCES stops the INC search early in pp_require to implement |
| 3553 | feature RT #113422 */ |
| 3554 | if(!retio && errno == EACCES) { /* exists but probably a directory */ |
| 3555 | int eno; |
| 3556 | st_rc = PerlLIO_stat(p, &st); |
| 3557 | if (st_rc >= 0) { |
| 3558 | if(S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) |
| 3559 | eno = 0; |
| 3560 | else |
| 3561 | eno = EACCES; |
| 3562 | errno = eno; |
| 3563 | } |
| 3564 | } |
| 3565 | #endif |
| 3566 | return retio; |
| 3567 | } |
| 3568 | |
| 3569 | #ifndef PERL_DISABLE_PMC |
| 3570 | STATIC PerlIO * |
| 3571 | S_doopen_pm(pTHX_ SV *name) |
| 3572 | { |
| 3573 | STRLEN namelen; |
| 3574 | const char *p = SvPV_const(name, namelen); |
| 3575 | |
| 3576 | PERL_ARGS_ASSERT_DOOPEN_PM; |
| 3577 | |
| 3578 | /* check the name before trying for the .pmc name to avoid the |
| 3579 | * warning referring to the .pmc which the user probably doesn't |
| 3580 | * know or care about |
| 3581 | */ |
| 3582 | if (!IS_SAFE_PATHNAME(p, namelen, "require")) |
| 3583 | return NULL; |
| 3584 | |
| 3585 | if (namelen > 3 && memEQs(p + namelen - 3, 3, ".pm")) { |
| 3586 | SV *const pmcsv = sv_newmortal(); |
| 3587 | PerlIO * pmcio; |
| 3588 | |
| 3589 | SvSetSV_nosteal(pmcsv,name); |
| 3590 | sv_catpvs(pmcsv, "c"); |
| 3591 | |
| 3592 | pmcio = check_type_and_open(pmcsv); |
| 3593 | if (pmcio) |
| 3594 | return pmcio; |
| 3595 | } |
| 3596 | return check_type_and_open(name); |
| 3597 | } |
| 3598 | #else |
| 3599 | # define doopen_pm(name) check_type_and_open(name) |
| 3600 | #endif /* !PERL_DISABLE_PMC */ |
| 3601 | |
| 3602 | /* require doesn't search for absolute names, or when the name is |
| 3603 | explicitly relative the current directory */ |
| 3604 | PERL_STATIC_INLINE bool |
| 3605 | S_path_is_searchable(const char *name) |
| 3606 | { |
| 3607 | PERL_ARGS_ASSERT_PATH_IS_SEARCHABLE; |
| 3608 | |
| 3609 | if (PERL_FILE_IS_ABSOLUTE(name) |
| 3610 | #ifdef WIN32 |
| 3611 | || (*name == '.' && ((name[1] == '/' || |
| 3612 | (name[1] == '.' && name[2] == '/')) |
| 3613 | || (name[1] == '\\' || |
| 3614 | ( name[1] == '.' && name[2] == '\\'))) |
| 3615 | ) |
| 3616 | #else |
| 3617 | || (*name == '.' && (name[1] == '/' || |
| 3618 | (name[1] == '.' && name[2] == '/'))) |
| 3619 | #endif |
| 3620 | ) |
| 3621 | { |
| 3622 | return FALSE; |
| 3623 | } |
| 3624 | else |
| 3625 | return TRUE; |
| 3626 | } |
| 3627 | |
| 3628 | |
| 3629 | /* implement 'require 5.010001' */ |
| 3630 | |
| 3631 | static OP * |
| 3632 | S_require_version(pTHX_ SV *sv) |
| 3633 | { |
| 3634 | dVAR; dSP; |
| 3635 | |
| 3636 | sv = sv_2mortal(new_version(sv)); |
| 3637 | if (!Perl_sv_derived_from_pvn(aTHX_ PL_patchlevel, STR_WITH_LEN("version"), 0)) |
| 3638 | upg_version(PL_patchlevel, TRUE); |
| 3639 | if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) { |
| 3640 | if ( vcmp(sv,PL_patchlevel) <= 0 ) |
| 3641 | DIE(aTHX_ "Perls since %" SVf " too modern--this is %" SVf ", stopped", |
| 3642 | SVfARG(sv_2mortal(vnormal(sv))), |
| 3643 | SVfARG(sv_2mortal(vnormal(PL_patchlevel))) |
| 3644 | ); |
| 3645 | } |
| 3646 | else { |
| 3647 | if ( vcmp(sv,PL_patchlevel) > 0 ) { |
| 3648 | I32 first = 0; |
| 3649 | AV *lav; |
| 3650 | SV * const req = SvRV(sv); |
| 3651 | SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE); |
| 3652 | |
| 3653 | /* get the left hand term */ |
| 3654 | lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE))); |
| 3655 | |
| 3656 | first = SvIV(*av_fetch(lav,0,0)); |
| 3657 | if ( first > (int)PERL_REVISION /* probably 'use 6.0' */ |
| 3658 | || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */ |
| 3659 | || av_tindex(lav) > 1 /* FP with > 3 digits */ |
| 3660 | || strstr(SvPVX(pv),".0") /* FP with leading 0 */ |
| 3661 | ) { |
| 3662 | DIE(aTHX_ "Perl %" SVf " required--this is only " |
| 3663 | "%" SVf ", stopped", |
| 3664 | SVfARG(sv_2mortal(vnormal(req))), |
| 3665 | SVfARG(sv_2mortal(vnormal(PL_patchlevel))) |
| 3666 | ); |
| 3667 | } |
| 3668 | else { /* probably 'use 5.10' or 'use 5.8' */ |
| 3669 | SV *hintsv; |
| 3670 | I32 second = 0; |
| 3671 | |
| 3672 | if (av_tindex(lav)>=1) |
| 3673 | second = SvIV(*av_fetch(lav,1,0)); |
| 3674 | |
| 3675 | second /= second >= 600 ? 100 : 10; |
| 3676 | hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0", |
| 3677 | (int)first, (int)second); |
| 3678 | upg_version(hintsv, TRUE); |
| 3679 | |
| 3680 | DIE(aTHX_ "Perl %" SVf " required (did you mean %" SVf "?)" |
| 3681 | "--this is only %" SVf ", stopped", |
| 3682 | SVfARG(sv_2mortal(vnormal(req))), |
| 3683 | SVfARG(sv_2mortal(vnormal(sv_2mortal(hintsv)))), |
| 3684 | SVfARG(sv_2mortal(vnormal(PL_patchlevel))) |
| 3685 | ); |
| 3686 | } |
| 3687 | } |
| 3688 | } |
| 3689 | |
| 3690 | RETPUSHYES; |
| 3691 | } |
| 3692 | |
| 3693 | /* Handle C<require Foo::Bar>, C<require "Foo/Bar.pm"> and C<do "Foo.pm">. |
| 3694 | * The first form will have already been converted at compile time to |
| 3695 | * the second form */ |
| 3696 | |
| 3697 | static OP * |
| 3698 | S_require_file(pTHX_ SV *sv) |
| 3699 | { |
| 3700 | dVAR; dSP; |
| 3701 | |
| 3702 | PERL_CONTEXT *cx; |
| 3703 | const char *name; |
| 3704 | STRLEN len; |
| 3705 | char * unixname; |
| 3706 | STRLEN unixlen; |
| 3707 | #ifdef VMS |
| 3708 | int vms_unixname = 0; |
| 3709 | char *unixdir; |
| 3710 | #endif |
| 3711 | const char *tryname = NULL; |
| 3712 | SV *namesv = NULL; |
| 3713 | const U8 gimme = GIMME_V; |
| 3714 | int filter_has_file = 0; |
| 3715 | PerlIO *tryrsfp = NULL; |
| 3716 | SV *filter_cache = NULL; |
| 3717 | SV *filter_state = NULL; |
| 3718 | SV *filter_sub = NULL; |
| 3719 | SV *hook_sv = NULL; |
| 3720 | OP *op; |
| 3721 | int saved_errno; |
| 3722 | bool path_searchable; |
| 3723 | I32 old_savestack_ix; |
| 3724 | const bool op_is_require = PL_op->op_type == OP_REQUIRE; |
| 3725 | const char *const op_name = op_is_require ? "require" : "do"; |
| 3726 | |
| 3727 | assert(op_is_require || PL_op->op_type == OP_DOFILE); |
| 3728 | |
| 3729 | if (!SvOK(sv)) |
| 3730 | DIE(aTHX_ "Missing or undefined argument to %s", op_name); |
| 3731 | name = SvPV_nomg_const(sv, len); |
| 3732 | if (!(name && len > 0 && *name)) |
| 3733 | DIE(aTHX_ "Missing or undefined argument to %s", op_name); |
| 3734 | |
| 3735 | if (!IS_SAFE_PATHNAME(name, len, op_name)) { |
| 3736 | if (!op_is_require) { |
| 3737 | CLEAR_ERRSV(); |
| 3738 | RETPUSHUNDEF; |
| 3739 | } |
| 3740 | DIE(aTHX_ "Can't locate %s: %s", |
| 3741 | pv_escape(newSVpvs_flags("",SVs_TEMP),name,len,len*2, |
| 3742 | NULL, SvUTF8(sv)?PERL_PV_ESCAPE_UNI:0), |
| 3743 | Strerror(ENOENT)); |
| 3744 | } |
| 3745 | TAINT_PROPER(op_name); |
| 3746 | |
| 3747 | path_searchable = path_is_searchable(name); |
| 3748 | |
| 3749 | #ifdef VMS |
| 3750 | /* The key in the %ENV hash is in the syntax of file passed as the argument |
| 3751 | * usually this is in UNIX format, but sometimes in VMS format, which |
| 3752 | * can result in a module being pulled in more than once. |
| 3753 | * To prevent this, the key must be stored in UNIX format if the VMS |
| 3754 | * name can be translated to UNIX. |
| 3755 | */ |
| 3756 | |
| 3757 | if ((unixname = |
| 3758 | tounixspec(name, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1))))) |
| 3759 | != NULL) { |
| 3760 | unixlen = strlen(unixname); |
| 3761 | vms_unixname = 1; |
| 3762 | } |
| 3763 | else |
| 3764 | #endif |
| 3765 | { |
| 3766 | /* if not VMS or VMS name can not be translated to UNIX, pass it |
| 3767 | * through. |
| 3768 | */ |
| 3769 | unixname = (char *) name; |
| 3770 | unixlen = len; |
| 3771 | } |
| 3772 | if (op_is_require) { |
| 3773 | SV * const * const svp = hv_fetch(GvHVn(PL_incgv), |
| 3774 | unixname, unixlen, 0); |
| 3775 | if ( svp ) { |
| 3776 | if (*svp != &PL_sv_undef) |
| 3777 | RETPUSHYES; |
| 3778 | else |
| 3779 | DIE(aTHX_ "Attempt to reload %s aborted.\n" |
| 3780 | "Compilation failed in require", unixname); |
| 3781 | } |
| 3782 | |
| 3783 | if (PL_op->op_flags & OPf_KIDS) { |
| 3784 | SVOP * const kid = (SVOP*)cUNOP->op_first; |
| 3785 | |
| 3786 | if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { |
| 3787 | /* require foo (or use foo) with a bareword. |
| 3788 | Perl_load_module fakes up the identical optree, but its |
| 3789 | arguments aren't restricted by the parser to real barewords. |
| 3790 | */ |
| 3791 | const STRLEN package_len = len - 3; |
| 3792 | const char slashdot[2] = {'/', '.'}; |
| 3793 | #ifdef DOSISH |
| 3794 | const char backslashdot[2] = {'\\', '.'}; |
| 3795 | #endif |
| 3796 | |
| 3797 | /* Disallow *purported* barewords that map to absolute |
| 3798 | filenames, filenames relative to the current or parent |
| 3799 | directory, or (*nix) hidden filenames. Also sanity check |
| 3800 | that the generated filename ends .pm */ |
| 3801 | if (!path_searchable || len < 3 || name[0] == '.' |
| 3802 | || !memEQ(name + package_len, ".pm", 3)) |
| 3803 | DIE(aTHX_ "Bareword in require maps to disallowed filename \"%" SVf "\"", sv); |
| 3804 | if (memchr(name, 0, package_len)) { |
| 3805 | /* diag_listed_as: Bareword in require contains "%s" */ |
| 3806 | DIE(aTHX_ "Bareword in require contains \"\\0\""); |
| 3807 | } |
| 3808 | if (ninstr(name, name + package_len, slashdot, |
| 3809 | slashdot + sizeof(slashdot))) { |
| 3810 | /* diag_listed_as: Bareword in require contains "%s" */ |
| 3811 | DIE(aTHX_ "Bareword in require contains \"/.\""); |
| 3812 | } |
| 3813 | #ifdef DOSISH |
| 3814 | if (ninstr(name, name + package_len, backslashdot, |
| 3815 | backslashdot + sizeof(backslashdot))) { |
| 3816 | /* diag_listed_as: Bareword in require contains "%s" */ |
| 3817 | DIE(aTHX_ "Bareword in require contains \"\\.\""); |
| 3818 | } |
| 3819 | #endif |
| 3820 | } |
| 3821 | } |
| 3822 | } |
| 3823 | |
| 3824 | PERL_DTRACE_PROBE_FILE_LOADING(unixname); |
| 3825 | |
| 3826 | /* prepare to compile file */ |
| 3827 | |
| 3828 | if (!path_searchable) { |
| 3829 | /* At this point, name is SvPVX(sv) */ |
| 3830 | tryname = name; |
| 3831 | tryrsfp = doopen_pm(sv); |
| 3832 | } |
| 3833 | if (!tryrsfp && !(errno == EACCES && !path_searchable)) { |
| 3834 | AV * const ar = GvAVn(PL_incgv); |
| 3835 | SSize_t i; |
| 3836 | #ifdef VMS |
| 3837 | if (vms_unixname) |
| 3838 | #endif |
| 3839 | { |
| 3840 | SV *nsv = sv; |
| 3841 | namesv = newSV_type(SVt_PV); |
| 3842 | for (i = 0; i <= AvFILL(ar); i++) { |
| 3843 | SV * const dirsv = *av_fetch(ar, i, TRUE); |
| 3844 | |
| 3845 | SvGETMAGIC(dirsv); |
| 3846 | if (SvROK(dirsv)) { |
| 3847 | int count; |
| 3848 | SV **svp; |
| 3849 | SV *loader = dirsv; |
| 3850 | |
| 3851 | if (SvTYPE(SvRV(loader)) == SVt_PVAV |
| 3852 | && !SvOBJECT(SvRV(loader))) |
| 3853 | { |
| 3854 | loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE); |
| 3855 | SvGETMAGIC(loader); |
| 3856 | } |
| 3857 | |
| 3858 | Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%" UVxf "/%s", |
| 3859 | PTR2UV(SvRV(dirsv)), name); |
| 3860 | tryname = SvPVX_const(namesv); |
| 3861 | tryrsfp = NULL; |
| 3862 | |
| 3863 | if (SvPADTMP(nsv)) { |
| 3864 | nsv = sv_newmortal(); |
| 3865 | SvSetSV_nosteal(nsv,sv); |
| 3866 | } |
| 3867 | |
| 3868 | ENTER_with_name("call_INC"); |
| 3869 | SAVETMPS; |
| 3870 | EXTEND(SP, 2); |
| 3871 | |
| 3872 | PUSHMARK(SP); |
| 3873 | PUSHs(dirsv); |
| 3874 | PUSHs(nsv); |
| 3875 | PUTBACK; |
| 3876 | if (SvGMAGICAL(loader)) { |
| 3877 | SV *l = sv_newmortal(); |
| 3878 | sv_setsv_nomg(l, loader); |
| 3879 | loader = l; |
| 3880 | } |
| 3881 | if (sv_isobject(loader)) |
| 3882 | count = call_method("INC", G_ARRAY); |
| 3883 | else |
| 3884 | count = call_sv(loader, G_ARRAY); |
| 3885 | SPAGAIN; |
| 3886 | |
| 3887 | if (count > 0) { |
| 3888 | int i = 0; |
| 3889 | SV *arg; |
| 3890 | |
| 3891 | SP -= count - 1; |
| 3892 | arg = SP[i++]; |
| 3893 | |
| 3894 | if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV) |
| 3895 | && !isGV_with_GP(SvRV(arg))) { |
| 3896 | filter_cache = SvRV(arg); |
| 3897 | |
| 3898 | if (i < count) { |
| 3899 | arg = SP[i++]; |
| 3900 | } |
| 3901 | } |
| 3902 | |
| 3903 | if (SvROK(arg) && isGV_with_GP(SvRV(arg))) { |
| 3904 | arg = SvRV(arg); |
| 3905 | } |
| 3906 | |
| 3907 | if (isGV_with_GP(arg)) { |
| 3908 | IO * const io = GvIO((const GV *)arg); |
| 3909 | |
| 3910 | ++filter_has_file; |
| 3911 | |
| 3912 | if (io) { |
| 3913 | tryrsfp = IoIFP(io); |
| 3914 | if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { |
| 3915 | PerlIO_close(IoOFP(io)); |
| 3916 | } |
| 3917 | IoIFP(io) = NULL; |
| 3918 | IoOFP(io) = NULL; |
| 3919 | } |
| 3920 | |
| 3921 | if (i < count) { |
| 3922 | arg = SP[i++]; |
| 3923 | } |
| 3924 | } |
| 3925 | |
| 3926 | if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) { |
| 3927 | filter_sub = arg; |
| 3928 | SvREFCNT_inc_simple_void_NN(filter_sub); |
| 3929 | |
| 3930 | if (i < count) { |
| 3931 | filter_state = SP[i]; |
| 3932 | SvREFCNT_inc_simple_void(filter_state); |
| 3933 | } |
| 3934 | } |
| 3935 | |
| 3936 | if (!tryrsfp && (filter_cache || filter_sub)) { |
| 3937 | tryrsfp = PerlIO_open(BIT_BUCKET, |
| 3938 | PERL_SCRIPT_MODE); |
| 3939 | } |
| 3940 | SP--; |
| 3941 | } |
| 3942 | |
| 3943 | /* FREETMPS may free our filter_cache */ |
| 3944 | SvREFCNT_inc_simple_void(filter_cache); |
| 3945 | |
| 3946 | PUTBACK; |
| 3947 | FREETMPS; |
| 3948 | LEAVE_with_name("call_INC"); |
| 3949 | |
| 3950 | /* Now re-mortalize it. */ |
| 3951 | sv_2mortal(filter_cache); |
| 3952 | |
| 3953 | /* Adjust file name if the hook has set an %INC entry. |
| 3954 | This needs to happen after the FREETMPS above. */ |
| 3955 | svp = hv_fetch(GvHVn(PL_incgv), name, len, 0); |
| 3956 | if (svp) |
| 3957 | tryname = SvPV_nolen_const(*svp); |
| 3958 | |
| 3959 | if (tryrsfp) { |
| 3960 | hook_sv = dirsv; |
| 3961 | break; |
| 3962 | } |
| 3963 | |
| 3964 | filter_has_file = 0; |
| 3965 | filter_cache = NULL; |
| 3966 | if (filter_state) { |
| 3967 | SvREFCNT_dec_NN(filter_state); |
| 3968 | filter_state = NULL; |
| 3969 | } |
| 3970 | if (filter_sub) { |
| 3971 | SvREFCNT_dec_NN(filter_sub); |
| 3972 | filter_sub = NULL; |
| 3973 | } |
| 3974 | } |
| 3975 | else { |
| 3976 | if (path_searchable) { |
| 3977 | const char *dir; |
| 3978 | STRLEN dirlen; |
| 3979 | |
| 3980 | if (SvOK(dirsv)) { |
| 3981 | dir = SvPV_nomg_const(dirsv, dirlen); |
| 3982 | } else { |
| 3983 | dir = ""; |
| 3984 | dirlen = 0; |
| 3985 | } |
| 3986 | |
| 3987 | if (!IS_SAFE_SYSCALL(dir, dirlen, "@INC entry", op_name)) |
| 3988 | continue; |
| 3989 | #ifdef VMS |
| 3990 | if ((unixdir = |
| 3991 | tounixpath(dir, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1))))) |
| 3992 | == NULL) |
| 3993 | continue; |
| 3994 | sv_setpv(namesv, unixdir); |
| 3995 | sv_catpv(namesv, unixname); |
| 3996 | #else |
| 3997 | # ifdef __SYMBIAN32__ |
| 3998 | if (PL_origfilename[0] && |
| 3999 | PL_origfilename[1] == ':' && |
| 4000 | !(dir[0] && dir[1] == ':')) |
| 4001 | Perl_sv_setpvf(aTHX_ namesv, |
| 4002 | "%c:%s\\%s", |
| 4003 | PL_origfilename[0], |
| 4004 | dir, name); |
| 4005 | else |
| 4006 | Perl_sv_setpvf(aTHX_ namesv, |
| 4007 | "%s\\%s", |
| 4008 | dir, name); |
| 4009 | # else |
| 4010 | /* The equivalent of |
| 4011 | Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name); |
| 4012 | but without the need to parse the format string, or |
| 4013 | call strlen on either pointer, and with the correct |
| 4014 | allocation up front. */ |
| 4015 | { |
| 4016 | char *tmp = SvGROW(namesv, dirlen + len + 2); |
| 4017 | |
| 4018 | memcpy(tmp, dir, dirlen); |
| 4019 | tmp +=dirlen; |
| 4020 | |
| 4021 | /* Avoid '<dir>//<file>' */ |
| 4022 | if (!dirlen || *(tmp-1) != '/') { |
| 4023 | *tmp++ = '/'; |
| 4024 | } else { |
| 4025 | /* So SvCUR_set reports the correct length below */ |
| 4026 | dirlen--; |
| 4027 | } |
| 4028 | |
| 4029 | /* name came from an SV, so it will have a '\0' at the |
| 4030 | end that we can copy as part of this memcpy(). */ |
| 4031 | memcpy(tmp, name, len + 1); |
| 4032 | |
| 4033 | SvCUR_set(namesv, dirlen + len + 1); |
| 4034 | SvPOK_on(namesv); |
| 4035 | } |
| 4036 | # endif |
| 4037 | #endif |
| 4038 | TAINT_PROPER(op_name); |
| 4039 | tryname = SvPVX_const(namesv); |
| 4040 | tryrsfp = doopen_pm(namesv); |
| 4041 | if (tryrsfp) { |
| 4042 | if (tryname[0] == '.' && tryname[1] == '/') { |
| 4043 | ++tryname; |
| 4044 | while (*++tryname == '/') {} |
| 4045 | } |
| 4046 | break; |
| 4047 | } |
| 4048 | else if (errno == EMFILE || errno == EACCES) { |
| 4049 | /* no point in trying other paths if out of handles; |
| 4050 | * on the other hand, if we couldn't open one of the |
| 4051 | * files, then going on with the search could lead to |
| 4052 | * unexpected results; see perl #113422 |
| 4053 | */ |
| 4054 | break; |
| 4055 | } |
| 4056 | } |
| 4057 | } |
| 4058 | } |
| 4059 | } |
| 4060 | } |
| 4061 | saved_errno = errno; /* sv_2mortal can realloc things */ |
| 4062 | sv_2mortal(namesv); |
| 4063 | if (!tryrsfp) { |
| 4064 | if (op_is_require) { |
| 4065 | if(saved_errno == EMFILE || saved_errno == EACCES) { |
| 4066 | /* diag_listed_as: Can't locate %s */ |
| 4067 | DIE(aTHX_ "Can't locate %s: %s: %s", |
| 4068 | name, tryname, Strerror(saved_errno)); |
| 4069 | } else { |
| 4070 | if (namesv) { /* did we lookup @INC? */ |
| 4071 | AV * const ar = GvAVn(PL_incgv); |
| 4072 | SSize_t i; |
| 4073 | SV *const msg = newSVpvs_flags("", SVs_TEMP); |
| 4074 | SV *const inc = newSVpvs_flags("", SVs_TEMP); |
| 4075 | for (i = 0; i <= AvFILL(ar); i++) { |
| 4076 | sv_catpvs(inc, " "); |
| 4077 | sv_catsv(inc, *av_fetch(ar, i, TRUE)); |
| 4078 | } |
| 4079 | if (len >= 4 && memEQ(name + len - 3, ".pm", 4)) { |
| 4080 | const char *c, *e = name + len - 3; |
| 4081 | sv_catpv(msg, " (you may need to install the "); |
| 4082 | for (c = name; c < e; c++) { |
| 4083 | if (*c == '/') { |
| 4084 | sv_catpvs(msg, "::"); |
| 4085 | } |
| 4086 | else { |
| 4087 | sv_catpvn(msg, c, 1); |
| 4088 | } |
| 4089 | } |
| 4090 | sv_catpv(msg, " module)"); |
| 4091 | } |
| 4092 | else if (len >= 2 && memEQ(name + len - 2, ".h", 3)) { |
| 4093 | sv_catpv(msg, " (change .h to .ph maybe?) (did you run h2ph?)"); |
| 4094 | } |
| 4095 | else if (len >= 3 && memEQ(name + len - 3, ".ph", 4)) { |
| 4096 | sv_catpv(msg, " (did you run h2ph?)"); |
| 4097 | } |
| 4098 | |
| 4099 | /* diag_listed_as: Can't locate %s */ |
| 4100 | DIE(aTHX_ |
| 4101 | "Can't locate %s in @INC%" SVf " (@INC contains:%" SVf ")", |
| 4102 | name, msg, inc); |
| 4103 | } |
| 4104 | } |
| 4105 | DIE(aTHX_ "Can't locate %s", name); |
| 4106 | } |
| 4107 | else { |
| 4108 | #ifdef DEFAULT_INC_EXCLUDES_DOT |
| 4109 | Stat_t st; |
| 4110 | PerlIO *io = NULL; |
| 4111 | dSAVE_ERRNO; |
| 4112 | /* the complication is to match the logic from doopen_pm() so we don't treat do "sda1" as |
| 4113 | a previously successful "do". |
| 4114 | */ |
| 4115 | bool do_warn = namesv && ckWARN_d(WARN_DEPRECATED) |
| 4116 | && PerlLIO_stat(name, &st) == 0 && !S_ISDIR(st.st_mode) && !S_ISBLK(st.st_mode) |
| 4117 | && (io = PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &sv)) != NULL; |
| 4118 | if (io) |
| 4119 | PerlIO_close(io); |
| 4120 | |
| 4121 | RESTORE_ERRNO; |
| 4122 | if (do_warn) { |
| 4123 | Perl_warner(aTHX_ packWARN(WARN_DEPRECATED), "do \"%s\" failed, '.' is no longer in @INC", name); |
| 4124 | } |
| 4125 | #endif |
| 4126 | CLEAR_ERRSV(); |
| 4127 | RETPUSHUNDEF; |
| 4128 | } |
| 4129 | } |
| 4130 | else |
| 4131 | SETERRNO(0, SS_NORMAL); |
| 4132 | |
| 4133 | /* Assume success here to prevent recursive requirement. */ |
| 4134 | /* name is never assigned to again, so len is still strlen(name) */ |
| 4135 | /* Check whether a hook in @INC has already filled %INC */ |
| 4136 | if (!hook_sv) { |
| 4137 | (void)hv_store(GvHVn(PL_incgv), |
| 4138 | unixname, unixlen, newSVpv(tryname,0),0); |
| 4139 | } else { |
| 4140 | SV** const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0); |
| 4141 | if (!svp) |
| 4142 | (void)hv_store(GvHVn(PL_incgv), |
| 4143 | unixname, unixlen, SvREFCNT_inc_simple(hook_sv), 0 ); |
| 4144 | } |
| 4145 | |
| 4146 | old_savestack_ix = PL_savestack_ix; |
| 4147 | SAVECOPFILE_FREE(&PL_compiling); |
| 4148 | CopFILE_set(&PL_compiling, tryname); |
| 4149 | lex_start(NULL, tryrsfp, 0); |
| 4150 | |
| 4151 | if (filter_sub || filter_cache) { |
| 4152 | /* We can use the SvPV of the filter PVIO itself as our cache, rather |
| 4153 | than hanging another SV from it. In turn, filter_add() optionally |
| 4154 | takes the SV to use as the filter (or creates a new SV if passed |
| 4155 | NULL), so simply pass in whatever value filter_cache has. */ |
| 4156 | SV * const fc = filter_cache ? newSV(0) : NULL; |
| 4157 | SV *datasv; |
| 4158 | if (fc) sv_copypv(fc, filter_cache); |
| 4159 | datasv = filter_add(S_run_user_filter, fc); |
| 4160 | IoLINES(datasv) = filter_has_file; |
| 4161 | IoTOP_GV(datasv) = MUTABLE_GV(filter_state); |
| 4162 | IoBOTTOM_GV(datasv) = MUTABLE_GV(filter_sub); |
| 4163 | } |
| 4164 | |
| 4165 | /* switch to eval mode */ |
| 4166 | cx = cx_pushblock(CXt_EVAL, gimme, SP, old_savestack_ix); |
| 4167 | cx_pusheval(cx, PL_op->op_next, newSVpv(name, 0)); |
| 4168 | |
| 4169 | SAVECOPLINE(&PL_compiling); |
| 4170 | CopLINE_set(&PL_compiling, 0); |
| 4171 | |
| 4172 | PUTBACK; |
| 4173 | |
| 4174 | if (doeval_compile(gimme, NULL, PL_curcop->cop_seq, NULL)) |
| 4175 | op = DOCATCH(PL_eval_start); |
| 4176 | else |
| 4177 | op = PL_op->op_next; |
| 4178 | |
| 4179 | PERL_DTRACE_PROBE_FILE_LOADED(unixname); |
| 4180 | |
| 4181 | return op; |
| 4182 | } |
| 4183 | |
| 4184 | |
| 4185 | /* also used for: pp_dofile() */ |
| 4186 | |
| 4187 | PP(pp_require) |
| 4188 | { |
| 4189 | dSP; |
| 4190 | SV *sv = POPs; |
| 4191 | SvGETMAGIC(sv); |
| 4192 | PUTBACK; |
| 4193 | return ((SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) |
| 4194 | ? S_require_version(aTHX_ sv) |
| 4195 | : S_require_file(aTHX_ sv); |
| 4196 | } |
| 4197 | |
| 4198 | |
| 4199 | /* This is a op added to hold the hints hash for |
| 4200 | pp_entereval. The hash can be modified by the code |
| 4201 | being eval'ed, so we return a copy instead. */ |
| 4202 | |
| 4203 | PP(pp_hintseval) |
| 4204 | { |
| 4205 | dSP; |
| 4206 | mXPUSHs(MUTABLE_SV(hv_copy_hints_hv(MUTABLE_HV(cSVOP_sv)))); |
| 4207 | RETURN; |
| 4208 | } |
| 4209 | |
| 4210 | |
| 4211 | PP(pp_entereval) |
| 4212 | { |
| 4213 | dSP; |
| 4214 | PERL_CONTEXT *cx; |
| 4215 | SV *sv; |
| 4216 | const U8 gimme = GIMME_V; |
| 4217 | const U32 was = PL_breakable_sub_gen; |
| 4218 | char tbuf[TYPE_DIGITS(long) + 12]; |
| 4219 | bool saved_delete = FALSE; |
| 4220 | char *tmpbuf = tbuf; |
| 4221 | STRLEN len; |
| 4222 | CV* runcv; |
| 4223 | U32 seq, lex_flags = 0; |
| 4224 | HV *saved_hh = NULL; |
| 4225 | const bool bytes = PL_op->op_private & OPpEVAL_BYTES; |
| 4226 | I32 old_savestack_ix; |
| 4227 | |
| 4228 | if (PL_op->op_private & OPpEVAL_HAS_HH) { |
| 4229 | saved_hh = MUTABLE_HV(SvREFCNT_inc(POPs)); |
| 4230 | } |
| 4231 | else if (PL_hints & HINT_LOCALIZE_HH || ( |
| 4232 | PL_op->op_private & OPpEVAL_COPHH |
| 4233 | && PL_curcop->cop_hints & HINT_LOCALIZE_HH |
| 4234 | )) { |
| 4235 | saved_hh = cop_hints_2hv(PL_curcop, 0); |
| 4236 | hv_magic(saved_hh, NULL, PERL_MAGIC_hints); |
| 4237 | } |
| 4238 | sv = POPs; |
| 4239 | if (!SvPOK(sv)) { |
| 4240 | /* make sure we've got a plain PV (no overload etc) before testing |
| 4241 | * for taint. Making a copy here is probably overkill, but better |
| 4242 | * safe than sorry */ |
| 4243 | STRLEN len; |
| 4244 | const char * const p = SvPV_const(sv, len); |
| 4245 | |
| 4246 | sv = newSVpvn_flags(p, len, SVs_TEMP | SvUTF8(sv)); |
| 4247 | lex_flags |= LEX_START_COPIED; |
| 4248 | |
| 4249 | if (bytes && SvUTF8(sv)) |
| 4250 | SvPVbyte_force(sv, len); |
| 4251 | } |
| 4252 | else if (bytes && SvUTF8(sv)) { |
| 4253 | /* Don't modify someone else's scalar */ |
| 4254 | STRLEN len; |
| 4255 | sv = newSVsv(sv); |
| 4256 | (void)sv_2mortal(sv); |
| 4257 | SvPVbyte_force(sv,len); |
| 4258 | lex_flags |= LEX_START_COPIED; |
| 4259 | } |
| 4260 | |
| 4261 | TAINT_IF(SvTAINTED(sv)); |
| 4262 | TAINT_PROPER("eval"); |
| 4263 | |
| 4264 | old_savestack_ix = PL_savestack_ix; |
| 4265 | |
| 4266 | lex_start(sv, NULL, lex_flags | (PL_op->op_private & OPpEVAL_UNICODE |
| 4267 | ? LEX_IGNORE_UTF8_HINTS |
| 4268 | : bytes ? LEX_EVALBYTES : LEX_START_SAME_FILTER |
| 4269 | ) |
| 4270 | ); |
| 4271 | |
| 4272 | /* switch to eval mode */ |
| 4273 | |
| 4274 | if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) { |
| 4275 | SV * const temp_sv = sv_newmortal(); |
| 4276 | Perl_sv_setpvf(aTHX_ temp_sv, "_<(eval %lu)[%s:%" IVdf "]", |
| 4277 | (unsigned long)++PL_evalseq, |
| 4278 | CopFILE(PL_curcop), (IV)CopLINE(PL_curcop)); |
| 4279 | tmpbuf = SvPVX(temp_sv); |
| 4280 | len = SvCUR(temp_sv); |
| 4281 | } |
| 4282 | else |
| 4283 | len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(eval %lu)", (unsigned long)++PL_evalseq); |
| 4284 | SAVECOPFILE_FREE(&PL_compiling); |
| 4285 | CopFILE_set(&PL_compiling, tmpbuf+2); |
| 4286 | SAVECOPLINE(&PL_compiling); |
| 4287 | CopLINE_set(&PL_compiling, 1); |
| 4288 | /* special case: an eval '' executed within the DB package gets lexically |
| 4289 | * placed in the first non-DB CV rather than the current CV - this |
| 4290 | * allows the debugger to execute code, find lexicals etc, in the |
| 4291 | * scope of the code being debugged. Passing &seq gets find_runcv |
| 4292 | * to do the dirty work for us */ |
| 4293 | runcv = find_runcv(&seq); |
| 4294 | |
| 4295 | cx = cx_pushblock((CXt_EVAL|CXp_REAL), gimme, SP, old_savestack_ix); |
| 4296 | cx_pusheval(cx, PL_op->op_next, NULL); |
| 4297 | |
| 4298 | /* prepare to compile string */ |
| 4299 | |
| 4300 | if (PERLDB_LINE_OR_SAVESRC && PL_curstash != PL_debstash) |
| 4301 | save_lines(CopFILEAV(&PL_compiling), PL_parser->linestr); |
| 4302 | else { |
| 4303 | /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up |
| 4304 | deleting the eval's FILEGV from the stash before gv_check() runs |
| 4305 | (i.e. before run-time proper). To work around the coredump that |
| 4306 | ensues, we always turn GvMULTI_on for any globals that were |
| 4307 | introduced within evals. See force_ident(). GSAR 96-10-12 */ |
| 4308 | char *const safestr = savepvn(tmpbuf, len); |
| 4309 | SAVEDELETE(PL_defstash, safestr, len); |
| 4310 | saved_delete = TRUE; |
| 4311 | } |
| 4312 | |
| 4313 | PUTBACK; |
| 4314 | |
| 4315 | if (doeval_compile(gimme, runcv, seq, saved_hh)) { |
| 4316 | if (was != PL_breakable_sub_gen /* Some subs defined here. */ |
| 4317 | ? PERLDB_LINE_OR_SAVESRC |
| 4318 | : PERLDB_SAVESRC_NOSUBS) { |
| 4319 | /* Retain the filegv we created. */ |
| 4320 | } else if (!saved_delete) { |
| 4321 | char *const safestr = savepvn(tmpbuf, len); |
| 4322 | SAVEDELETE(PL_defstash, safestr, len); |
| 4323 | } |
| 4324 | return DOCATCH(PL_eval_start); |
| 4325 | } else { |
| 4326 | /* We have already left the scope set up earlier thanks to the LEAVE |
| 4327 | in doeval_compile(). */ |
| 4328 | if (was != PL_breakable_sub_gen /* Some subs defined here. */ |
| 4329 | ? PERLDB_LINE_OR_SAVESRC |
| 4330 | : PERLDB_SAVESRC_INVALID) { |
| 4331 | /* Retain the filegv we created. */ |
| 4332 | } else if (!saved_delete) { |
| 4333 | (void)hv_delete(PL_defstash, tmpbuf, len, G_DISCARD); |
| 4334 | } |
| 4335 | return PL_op->op_next; |
| 4336 | } |
| 4337 | } |
| 4338 | |
| 4339 | |
| 4340 | /* also tail-called by pp_return */ |
| 4341 | |
| 4342 | PP(pp_leaveeval) |
| 4343 | { |
| 4344 | SV **oldsp; |
| 4345 | U8 gimme; |
| 4346 | PERL_CONTEXT *cx; |
| 4347 | OP *retop; |
| 4348 | int failed; |
| 4349 | CV *evalcv; |
| 4350 | bool keep; |
| 4351 | |
| 4352 | PERL_ASYNC_CHECK(); |
| 4353 | |
| 4354 | cx = CX_CUR(); |
| 4355 | assert(CxTYPE(cx) == CXt_EVAL); |
| 4356 | |
| 4357 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 4358 | gimme = cx->blk_gimme; |
| 4359 | |
| 4360 | /* did require return a false value? */ |
| 4361 | failed = CxOLD_OP_TYPE(cx) == OP_REQUIRE |
| 4362 | && !(gimme == G_SCALAR |
| 4363 | ? SvTRUE(*PL_stack_sp) |
| 4364 | : PL_stack_sp > oldsp); |
| 4365 | |
| 4366 | if (gimme == G_VOID) |
| 4367 | PL_stack_sp = oldsp; |
| 4368 | else |
| 4369 | leave_adjust_stacks(oldsp, oldsp, gimme, 0); |
| 4370 | |
| 4371 | /* the cx_popeval does a leavescope, which frees the optree associated |
| 4372 | * with eval, which if it frees the nextstate associated with |
| 4373 | * PL_curcop, sets PL_curcop to NULL. Which can mess up freeing a |
| 4374 | * regex when running under 'use re Debug' because it needs PL_curcop |
| 4375 | * to get the current hints. So restore it early. |
| 4376 | */ |
| 4377 | PL_curcop = cx->blk_oldcop; |
| 4378 | |
| 4379 | /* grab this value before cx_popeval restores the old PL_in_eval */ |
| 4380 | keep = cBOOL(PL_in_eval & EVAL_KEEPERR); |
| 4381 | retop = cx->blk_eval.retop; |
| 4382 | evalcv = cx->blk_eval.cv; |
| 4383 | #ifdef DEBUGGING |
| 4384 | assert(CvDEPTH(evalcv) == 1); |
| 4385 | #endif |
| 4386 | CvDEPTH(evalcv) = 0; |
| 4387 | |
| 4388 | /* pop the CXt_EVAL, and if a require failed, croak */ |
| 4389 | S_pop_eval_context_maybe_croak(aTHX_ cx, NULL, failed); |
| 4390 | |
| 4391 | if (!keep) |
| 4392 | CLEAR_ERRSV(); |
| 4393 | |
| 4394 | return retop; |
| 4395 | } |
| 4396 | |
| 4397 | /* Common code for Perl_call_sv and Perl_fold_constants, put here to keep it |
| 4398 | close to the related Perl_create_eval_scope. */ |
| 4399 | void |
| 4400 | Perl_delete_eval_scope(pTHX) |
| 4401 | { |
| 4402 | PERL_CONTEXT *cx; |
| 4403 | |
| 4404 | cx = CX_CUR(); |
| 4405 | CX_LEAVE_SCOPE(cx); |
| 4406 | cx_popeval(cx); |
| 4407 | cx_popblock(cx); |
| 4408 | CX_POP(cx); |
| 4409 | } |
| 4410 | |
| 4411 | /* Common-ish code salvaged from Perl_call_sv and pp_entertry, because it was |
| 4412 | also needed by Perl_fold_constants. */ |
| 4413 | void |
| 4414 | Perl_create_eval_scope(pTHX_ OP *retop, U32 flags) |
| 4415 | { |
| 4416 | PERL_CONTEXT *cx; |
| 4417 | const U8 gimme = GIMME_V; |
| 4418 | |
| 4419 | cx = cx_pushblock((CXt_EVAL|CXp_TRYBLOCK), gimme, |
| 4420 | PL_stack_sp, PL_savestack_ix); |
| 4421 | cx_pusheval(cx, retop, NULL); |
| 4422 | |
| 4423 | PL_in_eval = EVAL_INEVAL; |
| 4424 | if (flags & G_KEEPERR) |
| 4425 | PL_in_eval |= EVAL_KEEPERR; |
| 4426 | else |
| 4427 | CLEAR_ERRSV(); |
| 4428 | if (flags & G_FAKINGEVAL) { |
| 4429 | PL_eval_root = PL_op; /* Only needed so that goto works right. */ |
| 4430 | } |
| 4431 | } |
| 4432 | |
| 4433 | PP(pp_entertry) |
| 4434 | { |
| 4435 | create_eval_scope(cLOGOP->op_other->op_next, 0); |
| 4436 | return DOCATCH(PL_op->op_next); |
| 4437 | } |
| 4438 | |
| 4439 | |
| 4440 | /* also tail-called by pp_return */ |
| 4441 | |
| 4442 | PP(pp_leavetry) |
| 4443 | { |
| 4444 | SV **oldsp; |
| 4445 | U8 gimme; |
| 4446 | PERL_CONTEXT *cx; |
| 4447 | OP *retop; |
| 4448 | |
| 4449 | PERL_ASYNC_CHECK(); |
| 4450 | |
| 4451 | cx = CX_CUR(); |
| 4452 | assert(CxTYPE(cx) == CXt_EVAL); |
| 4453 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 4454 | gimme = cx->blk_gimme; |
| 4455 | |
| 4456 | if (gimme == G_VOID) |
| 4457 | PL_stack_sp = oldsp; |
| 4458 | else |
| 4459 | leave_adjust_stacks(oldsp, oldsp, gimme, 1); |
| 4460 | CX_LEAVE_SCOPE(cx); |
| 4461 | cx_popeval(cx); |
| 4462 | cx_popblock(cx); |
| 4463 | retop = cx->blk_eval.retop; |
| 4464 | CX_POP(cx); |
| 4465 | |
| 4466 | CLEAR_ERRSV(); |
| 4467 | return retop; |
| 4468 | } |
| 4469 | |
| 4470 | PP(pp_entergiven) |
| 4471 | { |
| 4472 | dSP; |
| 4473 | PERL_CONTEXT *cx; |
| 4474 | const U8 gimme = GIMME_V; |
| 4475 | SV *origsv = DEFSV; |
| 4476 | SV *newsv = POPs; |
| 4477 | |
| 4478 | assert(!PL_op->op_targ); /* used to be set for lexical $_ */ |
| 4479 | GvSV(PL_defgv) = SvREFCNT_inc(newsv); |
| 4480 | |
| 4481 | cx = cx_pushblock(CXt_GIVEN, gimme, SP, PL_savestack_ix); |
| 4482 | cx_pushgiven(cx, origsv); |
| 4483 | |
| 4484 | RETURN; |
| 4485 | } |
| 4486 | |
| 4487 | PP(pp_leavegiven) |
| 4488 | { |
| 4489 | PERL_CONTEXT *cx; |
| 4490 | U8 gimme; |
| 4491 | SV **oldsp; |
| 4492 | PERL_UNUSED_CONTEXT; |
| 4493 | |
| 4494 | cx = CX_CUR(); |
| 4495 | assert(CxTYPE(cx) == CXt_GIVEN); |
| 4496 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 4497 | gimme = cx->blk_gimme; |
| 4498 | |
| 4499 | if (gimme == G_VOID) |
| 4500 | PL_stack_sp = oldsp; |
| 4501 | else |
| 4502 | leave_adjust_stacks(oldsp, oldsp, gimme, 1); |
| 4503 | |
| 4504 | CX_LEAVE_SCOPE(cx); |
| 4505 | cx_popgiven(cx); |
| 4506 | cx_popblock(cx); |
| 4507 | CX_POP(cx); |
| 4508 | |
| 4509 | return NORMAL; |
| 4510 | } |
| 4511 | |
| 4512 | /* Helper routines used by pp_smartmatch */ |
| 4513 | STATIC PMOP * |
| 4514 | S_make_matcher(pTHX_ REGEXP *re) |
| 4515 | { |
| 4516 | PMOP *matcher = (PMOP *) newPMOP(OP_MATCH, OPf_WANT_SCALAR | OPf_STACKED); |
| 4517 | |
| 4518 | PERL_ARGS_ASSERT_MAKE_MATCHER; |
| 4519 | |
| 4520 | PM_SETRE(matcher, ReREFCNT_inc(re)); |
| 4521 | |
| 4522 | SAVEFREEOP((OP *) matcher); |
| 4523 | ENTER_with_name("matcher"); SAVETMPS; |
| 4524 | SAVEOP(); |
| 4525 | return matcher; |
| 4526 | } |
| 4527 | |
| 4528 | STATIC bool |
| 4529 | S_matcher_matches_sv(pTHX_ PMOP *matcher, SV *sv) |
| 4530 | { |
| 4531 | dSP; |
| 4532 | bool result; |
| 4533 | |
| 4534 | PERL_ARGS_ASSERT_MATCHER_MATCHES_SV; |
| 4535 | |
| 4536 | PL_op = (OP *) matcher; |
| 4537 | XPUSHs(sv); |
| 4538 | PUTBACK; |
| 4539 | (void) Perl_pp_match(aTHX); |
| 4540 | SPAGAIN; |
| 4541 | result = SvTRUEx(POPs); |
| 4542 | PUTBACK; |
| 4543 | |
| 4544 | return result; |
| 4545 | } |
| 4546 | |
| 4547 | STATIC void |
| 4548 | S_destroy_matcher(pTHX_ PMOP *matcher) |
| 4549 | { |
| 4550 | PERL_ARGS_ASSERT_DESTROY_MATCHER; |
| 4551 | PERL_UNUSED_ARG(matcher); |
| 4552 | |
| 4553 | FREETMPS; |
| 4554 | LEAVE_with_name("matcher"); |
| 4555 | } |
| 4556 | |
| 4557 | /* Do a smart match */ |
| 4558 | PP(pp_smartmatch) |
| 4559 | { |
| 4560 | DEBUG_M(Perl_deb(aTHX_ "Starting smart match resolution\n")); |
| 4561 | return do_smartmatch(NULL, NULL, 0); |
| 4562 | } |
| 4563 | |
| 4564 | /* This version of do_smartmatch() implements the |
| 4565 | * table of smart matches that is found in perlsyn. |
| 4566 | */ |
| 4567 | STATIC OP * |
| 4568 | S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied) |
| 4569 | { |
| 4570 | dSP; |
| 4571 | |
| 4572 | bool object_on_left = FALSE; |
| 4573 | SV *e = TOPs; /* e is for 'expression' */ |
| 4574 | SV *d = TOPm1s; /* d is for 'default', as in PL_defgv */ |
| 4575 | |
| 4576 | /* Take care only to invoke mg_get() once for each argument. |
| 4577 | * Currently we do this by copying the SV if it's magical. */ |
| 4578 | if (d) { |
| 4579 | if (!copied && SvGMAGICAL(d)) |
| 4580 | d = sv_mortalcopy(d); |
| 4581 | } |
| 4582 | else |
| 4583 | d = &PL_sv_undef; |
| 4584 | |
| 4585 | assert(e); |
| 4586 | if (SvGMAGICAL(e)) |
| 4587 | e = sv_mortalcopy(e); |
| 4588 | |
| 4589 | /* First of all, handle overload magic of the rightmost argument */ |
| 4590 | if (SvAMAGIC(e)) { |
| 4591 | SV * tmpsv; |
| 4592 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n")); |
| 4593 | DEBUG_M(Perl_deb(aTHX_ " attempting overload\n")); |
| 4594 | |
| 4595 | tmpsv = amagic_call(d, e, smart_amg, AMGf_noleft); |
| 4596 | if (tmpsv) { |
| 4597 | SPAGAIN; |
| 4598 | (void)POPs; |
| 4599 | SETs(tmpsv); |
| 4600 | RETURN; |
| 4601 | } |
| 4602 | DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; continuing...\n")); |
| 4603 | } |
| 4604 | |
| 4605 | SP -= 2; /* Pop the values */ |
| 4606 | PUTBACK; |
| 4607 | |
| 4608 | /* ~~ undef */ |
| 4609 | if (!SvOK(e)) { |
| 4610 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-undef\n")); |
| 4611 | if (SvOK(d)) |
| 4612 | RETPUSHNO; |
| 4613 | else |
| 4614 | RETPUSHYES; |
| 4615 | } |
| 4616 | |
| 4617 | if (SvROK(e) && SvOBJECT(SvRV(e)) && (SvTYPE(SvRV(e)) != SVt_REGEXP)) { |
| 4618 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n")); |
| 4619 | Perl_croak(aTHX_ "Smart matching a non-overloaded object breaks encapsulation"); |
| 4620 | } |
| 4621 | if (SvROK(d) && SvOBJECT(SvRV(d)) && (SvTYPE(SvRV(d)) != SVt_REGEXP)) |
| 4622 | object_on_left = TRUE; |
| 4623 | |
| 4624 | /* ~~ sub */ |
| 4625 | if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVCV) { |
| 4626 | I32 c; |
| 4627 | if (object_on_left) { |
| 4628 | goto sm_any_sub; /* Treat objects like scalars */ |
| 4629 | } |
| 4630 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { |
| 4631 | /* Test sub truth for each key */ |
| 4632 | HE *he; |
| 4633 | bool andedresults = TRUE; |
| 4634 | HV *hv = (HV*) SvRV(d); |
| 4635 | I32 numkeys = hv_iterinit(hv); |
| 4636 | DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-CodeRef\n")); |
| 4637 | if (numkeys == 0) |
| 4638 | RETPUSHYES; |
| 4639 | while ( (he = hv_iternext(hv)) ) { |
| 4640 | DEBUG_M(Perl_deb(aTHX_ " testing hash key...\n")); |
| 4641 | ENTER_with_name("smartmatch_hash_key_test"); |
| 4642 | SAVETMPS; |
| 4643 | PUSHMARK(SP); |
| 4644 | PUSHs(hv_iterkeysv(he)); |
| 4645 | PUTBACK; |
| 4646 | c = call_sv(e, G_SCALAR); |
| 4647 | SPAGAIN; |
| 4648 | if (c == 0) |
| 4649 | andedresults = FALSE; |
| 4650 | else |
| 4651 | andedresults = SvTRUEx(POPs) && andedresults; |
| 4652 | FREETMPS; |
| 4653 | LEAVE_with_name("smartmatch_hash_key_test"); |
| 4654 | } |
| 4655 | if (andedresults) |
| 4656 | RETPUSHYES; |
| 4657 | else |
| 4658 | RETPUSHNO; |
| 4659 | } |
| 4660 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { |
| 4661 | /* Test sub truth for each element */ |
| 4662 | SSize_t i; |
| 4663 | bool andedresults = TRUE; |
| 4664 | AV *av = (AV*) SvRV(d); |
| 4665 | const I32 len = av_tindex(av); |
| 4666 | DEBUG_M(Perl_deb(aTHX_ " applying rule Array-CodeRef\n")); |
| 4667 | if (len == -1) |
| 4668 | RETPUSHYES; |
| 4669 | for (i = 0; i <= len; ++i) { |
| 4670 | SV * const * const svp = av_fetch(av, i, FALSE); |
| 4671 | DEBUG_M(Perl_deb(aTHX_ " testing array element...\n")); |
| 4672 | ENTER_with_name("smartmatch_array_elem_test"); |
| 4673 | SAVETMPS; |
| 4674 | PUSHMARK(SP); |
| 4675 | if (svp) |
| 4676 | PUSHs(*svp); |
| 4677 | PUTBACK; |
| 4678 | c = call_sv(e, G_SCALAR); |
| 4679 | SPAGAIN; |
| 4680 | if (c == 0) |
| 4681 | andedresults = FALSE; |
| 4682 | else |
| 4683 | andedresults = SvTRUEx(POPs) && andedresults; |
| 4684 | FREETMPS; |
| 4685 | LEAVE_with_name("smartmatch_array_elem_test"); |
| 4686 | } |
| 4687 | if (andedresults) |
| 4688 | RETPUSHYES; |
| 4689 | else |
| 4690 | RETPUSHNO; |
| 4691 | } |
| 4692 | else { |
| 4693 | sm_any_sub: |
| 4694 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-CodeRef\n")); |
| 4695 | ENTER_with_name("smartmatch_coderef"); |
| 4696 | SAVETMPS; |
| 4697 | PUSHMARK(SP); |
| 4698 | PUSHs(d); |
| 4699 | PUTBACK; |
| 4700 | c = call_sv(e, G_SCALAR); |
| 4701 | SPAGAIN; |
| 4702 | if (c == 0) |
| 4703 | PUSHs(&PL_sv_no); |
| 4704 | else if (SvTEMP(TOPs)) |
| 4705 | SvREFCNT_inc_void(TOPs); |
| 4706 | FREETMPS; |
| 4707 | LEAVE_with_name("smartmatch_coderef"); |
| 4708 | RETURN; |
| 4709 | } |
| 4710 | } |
| 4711 | /* ~~ %hash */ |
| 4712 | else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVHV) { |
| 4713 | if (object_on_left) { |
| 4714 | goto sm_any_hash; /* Treat objects like scalars */ |
| 4715 | } |
| 4716 | else if (!SvOK(d)) { |
| 4717 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash ($a undef)\n")); |
| 4718 | RETPUSHNO; |
| 4719 | } |
| 4720 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { |
| 4721 | /* Check that the key-sets are identical */ |
| 4722 | HE *he; |
| 4723 | HV *other_hv = MUTABLE_HV(SvRV(d)); |
| 4724 | bool tied; |
| 4725 | bool other_tied; |
| 4726 | U32 this_key_count = 0, |
| 4727 | other_key_count = 0; |
| 4728 | HV *hv = MUTABLE_HV(SvRV(e)); |
| 4729 | |
| 4730 | DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Hash\n")); |
| 4731 | /* Tied hashes don't know how many keys they have. */ |
| 4732 | tied = cBOOL(SvTIED_mg((SV*)hv, PERL_MAGIC_tied)); |
| 4733 | other_tied = cBOOL(SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied)); |
| 4734 | if (!tied ) { |
| 4735 | if(other_tied) { |
| 4736 | /* swap HV sides */ |
| 4737 | HV * const temp = other_hv; |
| 4738 | other_hv = hv; |
| 4739 | hv = temp; |
| 4740 | tied = TRUE; |
| 4741 | other_tied = FALSE; |
| 4742 | } |
| 4743 | else if(HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv)) |
| 4744 | RETPUSHNO; |
| 4745 | } |
| 4746 | |
| 4747 | /* The hashes have the same number of keys, so it suffices |
| 4748 | to check that one is a subset of the other. */ |
| 4749 | (void) hv_iterinit(hv); |
| 4750 | while ( (he = hv_iternext(hv)) ) { |
| 4751 | SV *key = hv_iterkeysv(he); |
| 4752 | |
| 4753 | DEBUG_M(Perl_deb(aTHX_ " comparing hash key...\n")); |
| 4754 | ++ this_key_count; |
| 4755 | |
| 4756 | if(!hv_exists_ent(other_hv, key, 0)) { |
| 4757 | (void) hv_iterinit(hv); /* reset iterator */ |
| 4758 | RETPUSHNO; |
| 4759 | } |
| 4760 | } |
| 4761 | |
| 4762 | if (other_tied) { |
| 4763 | (void) hv_iterinit(other_hv); |
| 4764 | while ( hv_iternext(other_hv) ) |
| 4765 | ++other_key_count; |
| 4766 | } |
| 4767 | else |
| 4768 | other_key_count = HvUSEDKEYS(other_hv); |
| 4769 | |
| 4770 | if (this_key_count != other_key_count) |
| 4771 | RETPUSHNO; |
| 4772 | else |
| 4773 | RETPUSHYES; |
| 4774 | } |
| 4775 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { |
| 4776 | AV * const other_av = MUTABLE_AV(SvRV(d)); |
| 4777 | const SSize_t other_len = av_tindex(other_av) + 1; |
| 4778 | SSize_t i; |
| 4779 | HV *hv = MUTABLE_HV(SvRV(e)); |
| 4780 | |
| 4781 | DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Hash\n")); |
| 4782 | for (i = 0; i < other_len; ++i) { |
| 4783 | SV ** const svp = av_fetch(other_av, i, FALSE); |
| 4784 | DEBUG_M(Perl_deb(aTHX_ " checking for key existence...\n")); |
| 4785 | if (svp) { /* ??? When can this not happen? */ |
| 4786 | if (hv_exists_ent(hv, *svp, 0)) |
| 4787 | RETPUSHYES; |
| 4788 | } |
| 4789 | } |
| 4790 | RETPUSHNO; |
| 4791 | } |
| 4792 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) { |
| 4793 | DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Hash\n")); |
| 4794 | sm_regex_hash: |
| 4795 | { |
| 4796 | PMOP * const matcher = make_matcher((REGEXP*) SvRV(d)); |
| 4797 | HE *he; |
| 4798 | HV *hv = MUTABLE_HV(SvRV(e)); |
| 4799 | |
| 4800 | (void) hv_iterinit(hv); |
| 4801 | while ( (he = hv_iternext(hv)) ) { |
| 4802 | DEBUG_M(Perl_deb(aTHX_ " testing key against pattern...\n")); |
| 4803 | PUTBACK; |
| 4804 | if (matcher_matches_sv(matcher, hv_iterkeysv(he))) { |
| 4805 | SPAGAIN; |
| 4806 | (void) hv_iterinit(hv); |
| 4807 | destroy_matcher(matcher); |
| 4808 | RETPUSHYES; |
| 4809 | } |
| 4810 | SPAGAIN; |
| 4811 | } |
| 4812 | destroy_matcher(matcher); |
| 4813 | RETPUSHNO; |
| 4814 | } |
| 4815 | } |
| 4816 | else { |
| 4817 | sm_any_hash: |
| 4818 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash\n")); |
| 4819 | if (hv_exists_ent(MUTABLE_HV(SvRV(e)), d, 0)) |
| 4820 | RETPUSHYES; |
| 4821 | else |
| 4822 | RETPUSHNO; |
| 4823 | } |
| 4824 | } |
| 4825 | /* ~~ @array */ |
| 4826 | else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVAV) { |
| 4827 | if (object_on_left) { |
| 4828 | goto sm_any_array; /* Treat objects like scalars */ |
| 4829 | } |
| 4830 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { |
| 4831 | AV * const other_av = MUTABLE_AV(SvRV(e)); |
| 4832 | const SSize_t other_len = av_tindex(other_av) + 1; |
| 4833 | SSize_t i; |
| 4834 | |
| 4835 | DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Array\n")); |
| 4836 | for (i = 0; i < other_len; ++i) { |
| 4837 | SV ** const svp = av_fetch(other_av, i, FALSE); |
| 4838 | |
| 4839 | DEBUG_M(Perl_deb(aTHX_ " testing for key existence...\n")); |
| 4840 | if (svp) { /* ??? When can this not happen? */ |
| 4841 | if (hv_exists_ent(MUTABLE_HV(SvRV(d)), *svp, 0)) |
| 4842 | RETPUSHYES; |
| 4843 | } |
| 4844 | } |
| 4845 | RETPUSHNO; |
| 4846 | } |
| 4847 | if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { |
| 4848 | AV *other_av = MUTABLE_AV(SvRV(d)); |
| 4849 | DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Array\n")); |
| 4850 | if (av_tindex(MUTABLE_AV(SvRV(e))) != av_tindex(other_av)) |
| 4851 | RETPUSHNO; |
| 4852 | else { |
| 4853 | SSize_t i; |
| 4854 | const SSize_t other_len = av_tindex(other_av); |
| 4855 | |
| 4856 | if (NULL == seen_this) { |
| 4857 | seen_this = newHV(); |
| 4858 | (void) sv_2mortal(MUTABLE_SV(seen_this)); |
| 4859 | } |
| 4860 | if (NULL == seen_other) { |
| 4861 | seen_other = newHV(); |
| 4862 | (void) sv_2mortal(MUTABLE_SV(seen_other)); |
| 4863 | } |
| 4864 | for(i = 0; i <= other_len; ++i) { |
| 4865 | SV * const * const this_elem = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); |
| 4866 | SV * const * const other_elem = av_fetch(other_av, i, FALSE); |
| 4867 | |
| 4868 | if (!this_elem || !other_elem) { |
| 4869 | if ((this_elem && SvOK(*this_elem)) |
| 4870 | || (other_elem && SvOK(*other_elem))) |
| 4871 | RETPUSHNO; |
| 4872 | } |
| 4873 | else if (hv_exists_ent(seen_this, |
| 4874 | sv_2mortal(newSViv(PTR2IV(*this_elem))), 0) || |
| 4875 | hv_exists_ent(seen_other, |
| 4876 | sv_2mortal(newSViv(PTR2IV(*other_elem))), 0)) |
| 4877 | { |
| 4878 | if (*this_elem != *other_elem) |
| 4879 | RETPUSHNO; |
| 4880 | } |
| 4881 | else { |
| 4882 | (void)hv_store_ent(seen_this, |
| 4883 | sv_2mortal(newSViv(PTR2IV(*this_elem))), |
| 4884 | &PL_sv_undef, 0); |
| 4885 | (void)hv_store_ent(seen_other, |
| 4886 | sv_2mortal(newSViv(PTR2IV(*other_elem))), |
| 4887 | &PL_sv_undef, 0); |
| 4888 | PUSHs(*other_elem); |
| 4889 | PUSHs(*this_elem); |
| 4890 | |
| 4891 | PUTBACK; |
| 4892 | DEBUG_M(Perl_deb(aTHX_ " recursively comparing array element...\n")); |
| 4893 | (void) do_smartmatch(seen_this, seen_other, 0); |
| 4894 | SPAGAIN; |
| 4895 | DEBUG_M(Perl_deb(aTHX_ " recursion finished\n")); |
| 4896 | |
| 4897 | if (!SvTRUEx(POPs)) |
| 4898 | RETPUSHNO; |
| 4899 | } |
| 4900 | } |
| 4901 | RETPUSHYES; |
| 4902 | } |
| 4903 | } |
| 4904 | else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) { |
| 4905 | DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Array\n")); |
| 4906 | sm_regex_array: |
| 4907 | { |
| 4908 | PMOP * const matcher = make_matcher((REGEXP*) SvRV(d)); |
| 4909 | const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); |
| 4910 | SSize_t i; |
| 4911 | |
| 4912 | for(i = 0; i <= this_len; ++i) { |
| 4913 | SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); |
| 4914 | DEBUG_M(Perl_deb(aTHX_ " testing element against pattern...\n")); |
| 4915 | PUTBACK; |
| 4916 | if (svp && matcher_matches_sv(matcher, *svp)) { |
| 4917 | SPAGAIN; |
| 4918 | destroy_matcher(matcher); |
| 4919 | RETPUSHYES; |
| 4920 | } |
| 4921 | SPAGAIN; |
| 4922 | } |
| 4923 | destroy_matcher(matcher); |
| 4924 | RETPUSHNO; |
| 4925 | } |
| 4926 | } |
| 4927 | else if (!SvOK(d)) { |
| 4928 | /* undef ~~ array */ |
| 4929 | const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); |
| 4930 | SSize_t i; |
| 4931 | |
| 4932 | DEBUG_M(Perl_deb(aTHX_ " applying rule Undef-Array\n")); |
| 4933 | for (i = 0; i <= this_len; ++i) { |
| 4934 | SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); |
| 4935 | DEBUG_M(Perl_deb(aTHX_ " testing for undef element...\n")); |
| 4936 | if (!svp || !SvOK(*svp)) |
| 4937 | RETPUSHYES; |
| 4938 | } |
| 4939 | RETPUSHNO; |
| 4940 | } |
| 4941 | else { |
| 4942 | sm_any_array: |
| 4943 | { |
| 4944 | SSize_t i; |
| 4945 | const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); |
| 4946 | |
| 4947 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Array\n")); |
| 4948 | for (i = 0; i <= this_len; ++i) { |
| 4949 | SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); |
| 4950 | if (!svp) |
| 4951 | continue; |
| 4952 | |
| 4953 | PUSHs(d); |
| 4954 | PUSHs(*svp); |
| 4955 | PUTBACK; |
| 4956 | /* infinite recursion isn't supposed to happen here */ |
| 4957 | DEBUG_M(Perl_deb(aTHX_ " recursively testing array element...\n")); |
| 4958 | (void) do_smartmatch(NULL, NULL, 1); |
| 4959 | SPAGAIN; |
| 4960 | DEBUG_M(Perl_deb(aTHX_ " recursion finished\n")); |
| 4961 | if (SvTRUEx(POPs)) |
| 4962 | RETPUSHYES; |
| 4963 | } |
| 4964 | RETPUSHNO; |
| 4965 | } |
| 4966 | } |
| 4967 | } |
| 4968 | /* ~~ qr// */ |
| 4969 | else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_REGEXP) { |
| 4970 | if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { |
| 4971 | SV *t = d; d = e; e = t; |
| 4972 | DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Regex\n")); |
| 4973 | goto sm_regex_hash; |
| 4974 | } |
| 4975 | else if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { |
| 4976 | SV *t = d; d = e; e = t; |
| 4977 | DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Regex\n")); |
| 4978 | goto sm_regex_array; |
| 4979 | } |
| 4980 | else { |
| 4981 | PMOP * const matcher = make_matcher((REGEXP*) SvRV(e)); |
| 4982 | bool result; |
| 4983 | |
| 4984 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Regex\n")); |
| 4985 | PUTBACK; |
| 4986 | result = matcher_matches_sv(matcher, d); |
| 4987 | SPAGAIN; |
| 4988 | PUSHs(result ? &PL_sv_yes : &PL_sv_no); |
| 4989 | destroy_matcher(matcher); |
| 4990 | RETURN; |
| 4991 | } |
| 4992 | } |
| 4993 | /* ~~ scalar */ |
| 4994 | /* See if there is overload magic on left */ |
| 4995 | else if (object_on_left && SvAMAGIC(d)) { |
| 4996 | SV *tmpsv; |
| 4997 | DEBUG_M(Perl_deb(aTHX_ " applying rule Object-Any\n")); |
| 4998 | DEBUG_M(Perl_deb(aTHX_ " attempting overload\n")); |
| 4999 | PUSHs(d); PUSHs(e); |
| 5000 | PUTBACK; |
| 5001 | tmpsv = amagic_call(d, e, smart_amg, AMGf_noright); |
| 5002 | if (tmpsv) { |
| 5003 | SPAGAIN; |
| 5004 | (void)POPs; |
| 5005 | SETs(tmpsv); |
| 5006 | RETURN; |
| 5007 | } |
| 5008 | SP -= 2; |
| 5009 | DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; falling back...\n")); |
| 5010 | goto sm_any_scalar; |
| 5011 | } |
| 5012 | else if (!SvOK(d)) { |
| 5013 | /* undef ~~ scalar ; we already know that the scalar is SvOK */ |
| 5014 | DEBUG_M(Perl_deb(aTHX_ " applying rule undef-Any\n")); |
| 5015 | RETPUSHNO; |
| 5016 | } |
| 5017 | else |
| 5018 | sm_any_scalar: |
| 5019 | if (SvNIOK(e) || (SvPOK(e) && looks_like_number(e) && SvNIOK(d))) { |
| 5020 | DEBUG_M(if (SvNIOK(e)) |
| 5021 | Perl_deb(aTHX_ " applying rule Any-Num\n"); |
| 5022 | else |
| 5023 | Perl_deb(aTHX_ " applying rule Num-numish\n"); |
| 5024 | ); |
| 5025 | /* numeric comparison */ |
| 5026 | PUSHs(d); PUSHs(e); |
| 5027 | PUTBACK; |
| 5028 | if (CopHINTS_get(PL_curcop) & HINT_INTEGER) |
| 5029 | (void) Perl_pp_i_eq(aTHX); |
| 5030 | else |
| 5031 | (void) Perl_pp_eq(aTHX); |
| 5032 | SPAGAIN; |
| 5033 | if (SvTRUEx(POPs)) |
| 5034 | RETPUSHYES; |
| 5035 | else |
| 5036 | RETPUSHNO; |
| 5037 | } |
| 5038 | |
| 5039 | /* As a last resort, use string comparison */ |
| 5040 | DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Any\n")); |
| 5041 | PUSHs(d); PUSHs(e); |
| 5042 | PUTBACK; |
| 5043 | return Perl_pp_seq(aTHX); |
| 5044 | } |
| 5045 | |
| 5046 | PP(pp_enterwhen) |
| 5047 | { |
| 5048 | dSP; |
| 5049 | PERL_CONTEXT *cx; |
| 5050 | const U8 gimme = GIMME_V; |
| 5051 | |
| 5052 | /* This is essentially an optimization: if the match |
| 5053 | fails, we don't want to push a context and then |
| 5054 | pop it again right away, so we skip straight |
| 5055 | to the op that follows the leavewhen. |
| 5056 | RETURNOP calls PUTBACK which restores the stack pointer after the POPs. |
| 5057 | */ |
| 5058 | if (!(PL_op->op_flags & OPf_SPECIAL) && !SvTRUEx(POPs)) |
| 5059 | RETURNOP(cLOGOP->op_other->op_next); |
| 5060 | |
| 5061 | cx = cx_pushblock(CXt_WHEN, gimme, SP, PL_savestack_ix); |
| 5062 | cx_pushwhen(cx); |
| 5063 | |
| 5064 | RETURN; |
| 5065 | } |
| 5066 | |
| 5067 | PP(pp_leavewhen) |
| 5068 | { |
| 5069 | I32 cxix; |
| 5070 | PERL_CONTEXT *cx; |
| 5071 | U8 gimme; |
| 5072 | SV **oldsp; |
| 5073 | |
| 5074 | cx = CX_CUR(); |
| 5075 | assert(CxTYPE(cx) == CXt_WHEN); |
| 5076 | gimme = cx->blk_gimme; |
| 5077 | |
| 5078 | cxix = dopoptogivenfor(cxstack_ix); |
| 5079 | if (cxix < 0) |
| 5080 | /* diag_listed_as: Can't "when" outside a topicalizer */ |
| 5081 | DIE(aTHX_ "Can't \"%s\" outside a topicalizer", |
| 5082 | PL_op->op_flags & OPf_SPECIAL ? "default" : "when"); |
| 5083 | |
| 5084 | oldsp = PL_stack_base + cx->blk_oldsp; |
| 5085 | if (gimme == G_VOID) |
| 5086 | PL_stack_sp = oldsp; |
| 5087 | else |
| 5088 | leave_adjust_stacks(oldsp, oldsp, gimme, 1); |
| 5089 | |
| 5090 | /* pop the WHEN, BLOCK and anything else before the GIVEN/FOR */ |
| 5091 | assert(cxix < cxstack_ix); |
| 5092 | dounwind(cxix); |
| 5093 | |
| 5094 | cx = &cxstack[cxix]; |
| 5095 | |
| 5096 | if (CxFOREACH(cx)) { |
| 5097 | /* emulate pp_next. Note that any stack(s) cleanup will be |
| 5098 | * done by the pp_unstack which op_nextop should point to */ |
| 5099 | cx = CX_CUR(); |
| 5100 | cx_topblock(cx); |
| 5101 | PL_curcop = cx->blk_oldcop; |
| 5102 | return cx->blk_loop.my_op->op_nextop; |
| 5103 | } |
| 5104 | else { |
| 5105 | PERL_ASYNC_CHECK(); |
| 5106 | assert(cx->blk_givwhen.leave_op->op_type == OP_LEAVEGIVEN); |
| 5107 | return cx->blk_givwhen.leave_op; |
| 5108 | } |
| 5109 | } |
| 5110 | |
| 5111 | PP(pp_continue) |
| 5112 | { |
| 5113 | I32 cxix; |
| 5114 | PERL_CONTEXT *cx; |
| 5115 | OP *nextop; |
| 5116 | |
| 5117 | cxix = dopoptowhen(cxstack_ix); |
| 5118 | if (cxix < 0) |
| 5119 | DIE(aTHX_ "Can't \"continue\" outside a when block"); |
| 5120 | |
| 5121 | if (cxix < cxstack_ix) |
| 5122 | dounwind(cxix); |
| 5123 | |
| 5124 | cx = CX_CUR(); |
| 5125 | assert(CxTYPE(cx) == CXt_WHEN); |
| 5126 | PL_stack_sp = PL_stack_base + cx->blk_oldsp; |
| 5127 | CX_LEAVE_SCOPE(cx); |
| 5128 | cx_popwhen(cx); |
| 5129 | cx_popblock(cx); |
| 5130 | nextop = cx->blk_givwhen.leave_op->op_next; |
| 5131 | CX_POP(cx); |
| 5132 | |
| 5133 | return nextop; |
| 5134 | } |
| 5135 | |
| 5136 | PP(pp_break) |
| 5137 | { |
| 5138 | I32 cxix; |
| 5139 | PERL_CONTEXT *cx; |
| 5140 | |
| 5141 | cxix = dopoptogivenfor(cxstack_ix); |
| 5142 | if (cxix < 0) |
| 5143 | DIE(aTHX_ "Can't \"break\" outside a given block"); |
| 5144 | |
| 5145 | cx = &cxstack[cxix]; |
| 5146 | if (CxFOREACH(cx)) |
| 5147 | DIE(aTHX_ "Can't \"break\" in a loop topicalizer"); |
| 5148 | |
| 5149 | if (cxix < cxstack_ix) |
| 5150 | dounwind(cxix); |
| 5151 | |
| 5152 | /* Restore the sp at the time we entered the given block */ |
| 5153 | cx = CX_CUR(); |
| 5154 | PL_stack_sp = PL_stack_base + cx->blk_oldsp; |
| 5155 | |
| 5156 | return cx->blk_givwhen.leave_op; |
| 5157 | } |
| 5158 | |
| 5159 | static MAGIC * |
| 5160 | S_doparseform(pTHX_ SV *sv) |
| 5161 | { |
| 5162 | STRLEN len; |
| 5163 | char *s = SvPV(sv, len); |
| 5164 | char *send; |
| 5165 | char *base = NULL; /* start of current field */ |
| 5166 | I32 skipspaces = 0; /* number of contiguous spaces seen */ |
| 5167 | bool noblank = FALSE; /* ~ or ~~ seen on this line */ |
| 5168 | bool repeat = FALSE; /* ~~ seen on this line */ |
| 5169 | bool postspace = FALSE; /* a text field may need right padding */ |
| 5170 | U32 *fops; |
| 5171 | U32 *fpc; |
| 5172 | U32 *linepc = NULL; /* position of last FF_LINEMARK */ |
| 5173 | I32 arg; |
| 5174 | bool ischop; /* it's a ^ rather than a @ */ |
| 5175 | bool unchopnum = FALSE; /* at least one @ (i.e. non-chop) num field seen */ |
| 5176 | int maxops = 12; /* FF_LINEMARK + FF_END + 10 (\0 without preceding \n) */ |
| 5177 | MAGIC *mg = NULL; |
| 5178 | SV *sv_copy; |
| 5179 | |
| 5180 | PERL_ARGS_ASSERT_DOPARSEFORM; |
| 5181 | |
| 5182 | if (len == 0) |
| 5183 | Perl_croak(aTHX_ "Null picture in formline"); |
| 5184 | |
| 5185 | if (SvTYPE(sv) >= SVt_PVMG) { |
| 5186 | /* This might, of course, still return NULL. */ |
| 5187 | mg = mg_find(sv, PERL_MAGIC_fm); |
| 5188 | } else { |
| 5189 | sv_upgrade(sv, SVt_PVMG); |
| 5190 | } |
| 5191 | |
| 5192 | if (mg) { |
| 5193 | /* still the same as previously-compiled string? */ |
| 5194 | SV *old = mg->mg_obj; |
| 5195 | if ( !(!!SvUTF8(old) ^ !!SvUTF8(sv)) |
| 5196 | && len == SvCUR(old) |
| 5197 | && strnEQ(SvPVX(old), s, len) |
| 5198 | ) { |
| 5199 | DEBUG_f(PerlIO_printf(Perl_debug_log,"Re-using compiled format\n")); |
| 5200 | return mg; |
| 5201 | } |
| 5202 | |
| 5203 | DEBUG_f(PerlIO_printf(Perl_debug_log, "Re-compiling format\n")); |
| 5204 | Safefree(mg->mg_ptr); |
| 5205 | mg->mg_ptr = NULL; |
| 5206 | SvREFCNT_dec(old); |
| 5207 | mg->mg_obj = NULL; |
| 5208 | } |
| 5209 | else { |
| 5210 | DEBUG_f(PerlIO_printf(Perl_debug_log, "Compiling format\n")); |
| 5211 | mg = sv_magicext(sv, NULL, PERL_MAGIC_fm, &PL_vtbl_fm, NULL, 0); |
| 5212 | } |
| 5213 | |
| 5214 | sv_copy = newSVpvn_utf8(s, len, SvUTF8(sv)); |
| 5215 | s = SvPV(sv_copy, len); /* work on the copy, not the original */ |
| 5216 | send = s + len; |
| 5217 | |
| 5218 | |
| 5219 | /* estimate the buffer size needed */ |
| 5220 | for (base = s; s <= send; s++) { |
| 5221 | if (*s == '\n' || *s == '@' || *s == '^') |
| 5222 | maxops += 10; |
| 5223 | } |
| 5224 | s = base; |
| 5225 | base = NULL; |
| 5226 | |
| 5227 | Newx(fops, maxops, U32); |
| 5228 | fpc = fops; |
| 5229 | |
| 5230 | if (s < send) { |
| 5231 | linepc = fpc; |
| 5232 | *fpc++ = FF_LINEMARK; |
| 5233 | noblank = repeat = FALSE; |
| 5234 | base = s; |
| 5235 | } |
| 5236 | |
| 5237 | while (s <= send) { |
| 5238 | switch (*s++) { |
| 5239 | default: |
| 5240 | skipspaces = 0; |
| 5241 | continue; |
| 5242 | |
| 5243 | case '~': |
| 5244 | if (*s == '~') { |
| 5245 | repeat = TRUE; |
| 5246 | skipspaces++; |
| 5247 | s++; |
| 5248 | } |
| 5249 | noblank = TRUE; |
| 5250 | /* FALLTHROUGH */ |
| 5251 | case ' ': case '\t': |
| 5252 | skipspaces++; |
| 5253 | continue; |
| 5254 | case 0: |
| 5255 | if (s < send) { |
| 5256 | skipspaces = 0; |
| 5257 | continue; |
| 5258 | } /* else FALL THROUGH */ |
| 5259 | case '\n': |
| 5260 | arg = s - base; |
| 5261 | skipspaces++; |
| 5262 | arg -= skipspaces; |
| 5263 | if (arg) { |
| 5264 | if (postspace) |
| 5265 | *fpc++ = FF_SPACE; |
| 5266 | *fpc++ = FF_LITERAL; |
| 5267 | *fpc++ = (U32)arg; |
| 5268 | } |
| 5269 | postspace = FALSE; |
| 5270 | if (s <= send) |
| 5271 | skipspaces--; |
| 5272 | if (skipspaces) { |
| 5273 | *fpc++ = FF_SKIP; |
| 5274 | *fpc++ = (U32)skipspaces; |
| 5275 | } |
| 5276 | skipspaces = 0; |
| 5277 | if (s <= send) |
| 5278 | *fpc++ = FF_NEWLINE; |
| 5279 | if (noblank) { |
| 5280 | *fpc++ = FF_BLANK; |
| 5281 | if (repeat) |
| 5282 | arg = fpc - linepc + 1; |
| 5283 | else |
| 5284 | arg = 0; |
| 5285 | *fpc++ = (U32)arg; |
| 5286 | } |
| 5287 | if (s < send) { |
| 5288 | linepc = fpc; |
| 5289 | *fpc++ = FF_LINEMARK; |
| 5290 | noblank = repeat = FALSE; |
| 5291 | base = s; |
| 5292 | } |
| 5293 | else |
| 5294 | s++; |
| 5295 | continue; |
| 5296 | |
| 5297 | case '@': |
| 5298 | case '^': |
| 5299 | ischop = s[-1] == '^'; |
| 5300 | |
| 5301 | if (postspace) { |
| 5302 | *fpc++ = FF_SPACE; |
| 5303 | postspace = FALSE; |
| 5304 | } |
| 5305 | arg = (s - base) - 1; |
| 5306 | if (arg) { |
| 5307 | *fpc++ = FF_LITERAL; |
| 5308 | *fpc++ = (U32)arg; |
| 5309 | } |
| 5310 | |
| 5311 | base = s - 1; |
| 5312 | *fpc++ = FF_FETCH; |
| 5313 | if (*s == '*') { /* @* or ^* */ |
| 5314 | s++; |
| 5315 | *fpc++ = 2; /* skip the @* or ^* */ |
| 5316 | if (ischop) { |
| 5317 | *fpc++ = FF_LINESNGL; |
| 5318 | *fpc++ = FF_CHOP; |
| 5319 | } else |
| 5320 | *fpc++ = FF_LINEGLOB; |
| 5321 | } |
| 5322 | else if (*s == '#' || (*s == '.' && s[1] == '#')) { /* @###, ^### */ |
| 5323 | arg = ischop ? FORM_NUM_BLANK : 0; |
| 5324 | base = s - 1; |
| 5325 | while (*s == '#') |
| 5326 | s++; |
| 5327 | if (*s == '.') { |
| 5328 | const char * const f = ++s; |
| 5329 | while (*s == '#') |
| 5330 | s++; |
| 5331 | arg |= FORM_NUM_POINT + (s - f); |
| 5332 | } |
| 5333 | *fpc++ = s - base; /* fieldsize for FETCH */ |
| 5334 | *fpc++ = FF_DECIMAL; |
| 5335 | *fpc++ = (U32)arg; |
| 5336 | unchopnum |= ! ischop; |
| 5337 | } |
| 5338 | else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */ |
| 5339 | arg = ischop ? FORM_NUM_BLANK : 0; |
| 5340 | base = s - 1; |
| 5341 | s++; /* skip the '0' first */ |
| 5342 | while (*s == '#') |
| 5343 | s++; |
| 5344 | if (*s == '.') { |
| 5345 | const char * const f = ++s; |
| 5346 | while (*s == '#') |
| 5347 | s++; |
| 5348 | arg |= FORM_NUM_POINT + (s - f); |
| 5349 | } |
| 5350 | *fpc++ = s - base; /* fieldsize for FETCH */ |
| 5351 | *fpc++ = FF_0DECIMAL; |
| 5352 | *fpc++ = (U32)arg; |
| 5353 | unchopnum |= ! ischop; |
| 5354 | } |
| 5355 | else { /* text field */ |
| 5356 | I32 prespace = 0; |
| 5357 | bool ismore = FALSE; |
| 5358 | |
| 5359 | if (*s == '>') { |
| 5360 | while (*++s == '>') ; |
| 5361 | prespace = FF_SPACE; |
| 5362 | } |
| 5363 | else if (*s == '|') { |
| 5364 | while (*++s == '|') ; |
| 5365 | prespace = FF_HALFSPACE; |
| 5366 | postspace = TRUE; |
| 5367 | } |
| 5368 | else { |
| 5369 | if (*s == '<') |
| 5370 | while (*++s == '<') ; |
| 5371 | postspace = TRUE; |
| 5372 | } |
| 5373 | if (*s == '.' && s[1] == '.' && s[2] == '.') { |
| 5374 | s += 3; |
| 5375 | ismore = TRUE; |
| 5376 | } |
| 5377 | *fpc++ = s - base; /* fieldsize for FETCH */ |
| 5378 | |
| 5379 | *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL; |
| 5380 | |
| 5381 | if (prespace) |
| 5382 | *fpc++ = (U32)prespace; /* add SPACE or HALFSPACE */ |
| 5383 | *fpc++ = FF_ITEM; |
| 5384 | if (ismore) |
| 5385 | *fpc++ = FF_MORE; |
| 5386 | if (ischop) |
| 5387 | *fpc++ = FF_CHOP; |
| 5388 | } |
| 5389 | base = s; |
| 5390 | skipspaces = 0; |
| 5391 | continue; |
| 5392 | } |
| 5393 | } |
| 5394 | *fpc++ = FF_END; |
| 5395 | |
| 5396 | assert (fpc <= fops + maxops); /* ensure our buffer estimate was valid */ |
| 5397 | arg = fpc - fops; |
| 5398 | |
| 5399 | mg->mg_ptr = (char *) fops; |
| 5400 | mg->mg_len = arg * sizeof(U32); |
| 5401 | mg->mg_obj = sv_copy; |
| 5402 | mg->mg_flags |= MGf_REFCOUNTED; |
| 5403 | |
| 5404 | if (unchopnum && repeat) |
| 5405 | Perl_die(aTHX_ "Repeated format line will never terminate (~~ and @#)"); |
| 5406 | |
| 5407 | return mg; |
| 5408 | } |
| 5409 | |
| 5410 | |
| 5411 | STATIC bool |
| 5412 | S_num_overflow(NV value, I32 fldsize, I32 frcsize) |
| 5413 | { |
| 5414 | /* Can value be printed in fldsize chars, using %*.*f ? */ |
| 5415 | NV pwr = 1; |
| 5416 | NV eps = 0.5; |
| 5417 | bool res = FALSE; |
| 5418 | int intsize = fldsize - (value < 0 ? 1 : 0); |
| 5419 | |
| 5420 | if (frcsize & FORM_NUM_POINT) |
| 5421 | intsize--; |
| 5422 | frcsize &= ~(FORM_NUM_POINT|FORM_NUM_BLANK); |
| 5423 | intsize -= frcsize; |
| 5424 | |
| 5425 | while (intsize--) pwr *= 10.0; |
| 5426 | while (frcsize--) eps /= 10.0; |
| 5427 | |
| 5428 | if( value >= 0 ){ |
| 5429 | if (value + eps >= pwr) |
| 5430 | res = TRUE; |
| 5431 | } else { |
| 5432 | if (value - eps <= -pwr) |
| 5433 | res = TRUE; |
| 5434 | } |
| 5435 | return res; |
| 5436 | } |
| 5437 | |
| 5438 | static I32 |
| 5439 | S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen) |
| 5440 | { |
| 5441 | SV * const datasv = FILTER_DATA(idx); |
| 5442 | const int filter_has_file = IoLINES(datasv); |
| 5443 | SV * const filter_state = MUTABLE_SV(IoTOP_GV(datasv)); |
| 5444 | SV * const filter_sub = MUTABLE_SV(IoBOTTOM_GV(datasv)); |
| 5445 | int status = 0; |
| 5446 | SV *upstream; |
| 5447 | STRLEN got_len; |
| 5448 | char *got_p = NULL; |
| 5449 | char *prune_from = NULL; |
| 5450 | bool read_from_cache = FALSE; |
| 5451 | STRLEN umaxlen; |
| 5452 | SV *err = NULL; |
| 5453 | |
| 5454 | PERL_ARGS_ASSERT_RUN_USER_FILTER; |
| 5455 | |
| 5456 | assert(maxlen >= 0); |
| 5457 | umaxlen = maxlen; |
| 5458 | |
| 5459 | /* I was having segfault trouble under Linux 2.2.5 after a |
| 5460 | parse error occurred. (Had to hack around it with a test |
| 5461 | for PL_parser->error_count == 0.) Solaris doesn't segfault -- |
| 5462 | not sure where the trouble is yet. XXX */ |
| 5463 | |
| 5464 | { |
| 5465 | SV *const cache = datasv; |
| 5466 | if (SvOK(cache)) { |
| 5467 | STRLEN cache_len; |
| 5468 | const char *cache_p = SvPV(cache, cache_len); |
| 5469 | STRLEN take = 0; |
| 5470 | |
| 5471 | if (umaxlen) { |
| 5472 | /* Running in block mode and we have some cached data already. |
| 5473 | */ |
| 5474 | if (cache_len >= umaxlen) { |
| 5475 | /* In fact, so much data we don't even need to call |
| 5476 | filter_read. */ |
| 5477 | take = umaxlen; |
| 5478 | } |
| 5479 | } else { |
| 5480 | const char *const first_nl = |
| 5481 | (const char *)memchr(cache_p, '\n', cache_len); |
| 5482 | if (first_nl) { |
| 5483 | take = first_nl + 1 - cache_p; |
| 5484 | } |
| 5485 | } |
| 5486 | if (take) { |
| 5487 | sv_catpvn(buf_sv, cache_p, take); |
| 5488 | sv_chop(cache, cache_p + take); |
| 5489 | /* Definitely not EOF */ |
| 5490 | return 1; |
| 5491 | } |
| 5492 | |
| 5493 | sv_catsv(buf_sv, cache); |
| 5494 | if (umaxlen) { |
| 5495 | umaxlen -= cache_len; |
| 5496 | } |
| 5497 | SvOK_off(cache); |
| 5498 | read_from_cache = TRUE; |
| 5499 | } |
| 5500 | } |
| 5501 | |
| 5502 | /* Filter API says that the filter appends to the contents of the buffer. |
| 5503 | Usually the buffer is "", so the details don't matter. But if it's not, |
| 5504 | then clearly what it contains is already filtered by this filter, so we |
| 5505 | don't want to pass it in a second time. |
| 5506 | I'm going to use a mortal in case the upstream filter croaks. */ |
| 5507 | upstream = ((SvOK(buf_sv) && sv_len(buf_sv)) || SvGMAGICAL(buf_sv)) |
| 5508 | ? sv_newmortal() : buf_sv; |
| 5509 | SvUPGRADE(upstream, SVt_PV); |
| 5510 | |
| 5511 | if (filter_has_file) { |
| 5512 | status = FILTER_READ(idx+1, upstream, 0); |
| 5513 | } |
| 5514 | |
| 5515 | if (filter_sub && status >= 0) { |
| 5516 | dSP; |
| 5517 | int count; |
| 5518 | |
| 5519 | ENTER_with_name("call_filter_sub"); |
| 5520 | SAVE_DEFSV; |
| 5521 | SAVETMPS; |
| 5522 | EXTEND(SP, 2); |
| 5523 | |
| 5524 | DEFSV_set(upstream); |
| 5525 | PUSHMARK(SP); |
| 5526 | mPUSHi(0); |
| 5527 | if (filter_state) { |
| 5528 | PUSHs(filter_state); |
| 5529 | } |
| 5530 | PUTBACK; |
| 5531 | count = call_sv(filter_sub, G_SCALAR|G_EVAL); |
| 5532 | SPAGAIN; |
| 5533 | |
| 5534 | if (count > 0) { |
| 5535 | SV *out = POPs; |
| 5536 | SvGETMAGIC(out); |
| 5537 | if (SvOK(out)) { |
| 5538 | status = SvIV(out); |
| 5539 | } |
| 5540 | else { |
| 5541 | SV * const errsv = ERRSV; |
| 5542 | if (SvTRUE_NN(errsv)) |
| 5543 | err = newSVsv(errsv); |
| 5544 | } |
| 5545 | } |
| 5546 | |
| 5547 | PUTBACK; |
| 5548 | FREETMPS; |
| 5549 | LEAVE_with_name("call_filter_sub"); |
| 5550 | } |
| 5551 | |
| 5552 | if (SvGMAGICAL(upstream)) { |
| 5553 | mg_get(upstream); |
| 5554 | if (upstream == buf_sv) mg_free(buf_sv); |
| 5555 | } |
| 5556 | if (SvIsCOW(upstream)) sv_force_normal(upstream); |
| 5557 | if(!err && SvOK(upstream)) { |
| 5558 | got_p = SvPV_nomg(upstream, got_len); |
| 5559 | if (umaxlen) { |
| 5560 | if (got_len > umaxlen) { |
| 5561 | prune_from = got_p + umaxlen; |
| 5562 | } |
| 5563 | } else { |
| 5564 | char *const first_nl = (char *)memchr(got_p, '\n', got_len); |
| 5565 | if (first_nl && first_nl + 1 < got_p + got_len) { |
| 5566 | /* There's a second line here... */ |
| 5567 | prune_from = first_nl + 1; |
| 5568 | } |
| 5569 | } |
| 5570 | } |
| 5571 | if (!err && prune_from) { |
| 5572 | /* Oh. Too long. Stuff some in our cache. */ |
| 5573 | STRLEN cached_len = got_p + got_len - prune_from; |
| 5574 | SV *const cache = datasv; |
| 5575 | |
| 5576 | if (SvOK(cache)) { |
| 5577 | /* Cache should be empty. */ |
| 5578 | assert(!SvCUR(cache)); |
| 5579 | } |
| 5580 | |
| 5581 | sv_setpvn(cache, prune_from, cached_len); |
| 5582 | /* If you ask for block mode, you may well split UTF-8 characters. |
| 5583 | "If it breaks, you get to keep both parts" |
| 5584 | (Your code is broken if you don't put them back together again |
| 5585 | before something notices.) */ |
| 5586 | if (SvUTF8(upstream)) { |
| 5587 | SvUTF8_on(cache); |
| 5588 | } |
| 5589 | if (SvPOK(upstream)) SvCUR_set(upstream, got_len - cached_len); |
| 5590 | else |
| 5591 | /* Cannot just use sv_setpvn, as that could free the buffer |
| 5592 | before we have a chance to assign it. */ |
| 5593 | sv_usepvn(upstream, savepvn(got_p, got_len - cached_len), |
| 5594 | got_len - cached_len); |
| 5595 | *prune_from = 0; |
| 5596 | /* Can't yet be EOF */ |
| 5597 | if (status == 0) |
| 5598 | status = 1; |
| 5599 | } |
| 5600 | |
| 5601 | /* If they are at EOF but buf_sv has something in it, then they may never |
| 5602 | have touched the SV upstream, so it may be undefined. If we naively |
| 5603 | concatenate it then we get a warning about use of uninitialised value. |
| 5604 | */ |
| 5605 | if (!err && upstream != buf_sv && |
| 5606 | SvOK(upstream)) { |
| 5607 | sv_catsv_nomg(buf_sv, upstream); |
| 5608 | } |
| 5609 | else if (SvOK(upstream)) (void)SvPV_force_nolen(buf_sv); |
| 5610 | |
| 5611 | if (status <= 0) { |
| 5612 | IoLINES(datasv) = 0; |
| 5613 | if (filter_state) { |
| 5614 | SvREFCNT_dec(filter_state); |
| 5615 | IoTOP_GV(datasv) = NULL; |
| 5616 | } |
| 5617 | if (filter_sub) { |
| 5618 | SvREFCNT_dec(filter_sub); |
| 5619 | IoBOTTOM_GV(datasv) = NULL; |
| 5620 | } |
| 5621 | filter_del(S_run_user_filter); |
| 5622 | } |
| 5623 | |
| 5624 | if (err) |
| 5625 | croak_sv(err); |
| 5626 | |
| 5627 | if (status == 0 && read_from_cache) { |
| 5628 | /* If we read some data from the cache (and by getting here it implies |
| 5629 | that we emptied the cache) then we aren't yet at EOF, and mustn't |
| 5630 | report that to our caller. */ |
| 5631 | return 1; |
| 5632 | } |
| 5633 | return status; |
| 5634 | } |
| 5635 | |
| 5636 | /* |
| 5637 | * ex: set ts=8 sts=4 sw=4 et: |
| 5638 | */ |