https://perl5.git.perl.org / perl5.git / blame
| Commit | Line | Data |
|---|---|---|
| 8d063cd8 LW |
1 | char rcsid[] = "$Header: perly.c,v 1.0 87/12/18 15:53:31 root Exp $"; |
| 2 | /* | |
| 3 | * $Log: perly.c,v $ | |
| 4 | * Revision 1.0 87/12/18 15:53:31 root | |
| 5 | * Initial revision | |
| 6 | * | |
| 7 | */ | |
| 8 | ||
| 9 | bool preprocess = FALSE; | |
| 10 | bool assume_n = FALSE; | |
| 11 | bool assume_p = FALSE; | |
| 12 | bool doswitches = FALSE; | |
| 13 | char *filename; | |
| 14 | char *e_tmpname = "/tmp/perl-eXXXXXX"; | |
| 15 | FILE *e_fp = Nullfp; | |
| 16 | ARG *l(); | |
| 17 | ||
| 18 | main(argc,argv,env) | |
| 19 | register int argc; | |
| 20 | register char **argv; | |
| 21 | register char **env; | |
| 22 | { | |
| 23 | register STR *str; | |
| 24 | register char *s; | |
| 25 | char *index(); | |
| 26 | ||
| 27 | linestr = str_new(80); | |
| 28 | str = str_make("-I/usr/lib/perl "); /* first used for -I flags */ | |
| 29 | for (argc--,argv++; argc; argc--,argv++) { | |
| 30 | if (argv[0][0] != '-' || !argv[0][1]) | |
| 31 | break; | |
| 32 | reswitch: | |
| 33 | switch (argv[0][1]) { | |
| 34 | #ifdef DEBUGGING | |
| 35 | case 'D': | |
| 36 | debug = atoi(argv[0]+2); | |
| 37 | #ifdef YYDEBUG | |
| 38 | yydebug = (debug & 1); | |
| 39 | #endif | |
| 40 | break; | |
| 41 | #endif | |
| 42 | case 'e': | |
| 43 | if (!e_fp) { | |
| 44 | mktemp(e_tmpname); | |
| 45 | e_fp = fopen(e_tmpname,"w"); | |
| 46 | } | |
| 47 | if (argv[1]) | |
| 48 | fputs(argv[1],e_fp); | |
| 49 | putc('\n', e_fp); | |
| 50 | argc--,argv++; | |
| 51 | break; | |
| 52 | case 'i': | |
| 53 | inplace = savestr(argv[0]+2); | |
| 54 | argvoutstab = stabent("ARGVOUT",TRUE); | |
| 55 | break; | |
| 56 | case 'I': | |
| 57 | str_cat(str,argv[0]); | |
| 58 | str_cat(str," "); | |
| 59 | if (!argv[0][2]) { | |
| 60 | str_cat(str,argv[1]); | |
| 61 | argc--,argv++; | |
| 62 | str_cat(str," "); | |
| 63 | } | |
| 64 | break; | |
| 65 | case 'n': | |
| 66 | assume_n = TRUE; | |
| 67 | strcpy(argv[0], argv[0]+1); | |
| 68 | goto reswitch; | |
| 69 | case 'p': | |
| 70 | assume_p = TRUE; | |
| 71 | strcpy(argv[0], argv[0]+1); | |
| 72 | goto reswitch; | |
| 73 | case 'P': | |
| 74 | preprocess = TRUE; | |
| 75 | strcpy(argv[0], argv[0]+1); | |
| 76 | goto reswitch; | |
| 77 | case 's': | |
| 78 | doswitches = TRUE; | |
| 79 | strcpy(argv[0], argv[0]+1); | |
| 80 | goto reswitch; | |
| 81 | case 'v': | |
| 82 | version(); | |
| 83 | exit(0); | |
| 84 | case '-': | |
| 85 | argc--,argv++; | |
| 86 | goto switch_end; | |
| 87 | case 0: | |
| 88 | break; | |
| 89 | default: | |
| 90 | fatal("Unrecognized switch: %s\n",argv[0]); | |
| 91 | } | |
| 92 | } | |
| 93 | switch_end: | |
| 94 | if (e_fp) { | |
| 95 | fclose(e_fp); | |
| 96 | argc++,argv--; | |
| 97 | argv[0] = e_tmpname; | |
| 98 | } | |
| 99 | ||
| 100 | str_set(&str_no,No); | |
| 101 | str_set(&str_yes,Yes); | |
| 102 | init_eval(); | |
| 103 | ||
| 104 | /* open script */ | |
| 105 | ||
| 106 | if (argv[0] == Nullch) | |
| 107 | argv[0] = "-"; | |
| 108 | filename = savestr(argv[0]); | |
| 109 | if (strEQ(filename,"-")) | |
| 110 | argv[0] = ""; | |
| 111 | if (preprocess) { | |
| 112 | sprintf(buf, "\ | |
| 113 | /bin/sed -e '/^[^#]/b' \ | |
| 114 | -e '/^#[ ]*include[ ]/b' \ | |
| 115 | -e '/^#[ ]*define[ ]/b' \ | |
| 116 | -e '/^#[ ]*if[ ]/b' \ | |
| 117 | -e '/^#[ ]*ifdef[ ]/b' \ | |
| 118 | -e '/^#[ ]*else/b' \ | |
| 119 | -e '/^#[ ]*endif/b' \ | |
| 120 | -e 's/^#.*//' \ | |
| 121 | %s | /lib/cpp -C %s-", | |
| 122 | argv[0], str_get(str)); | |
| 123 | rsfp = popen(buf,"r"); | |
| 124 | } | |
| 125 | else if (!*argv[0]) | |
| 126 | rsfp = stdin; | |
| 127 | else | |
| 128 | rsfp = fopen(argv[0],"r"); | |
| 129 | if (rsfp == Nullfp) | |
| 130 | fatal("Perl script \"%s\" doesn't seem to exist.\n",filename); | |
| 131 | str_free(str); /* free -I directories */ | |
| 132 | ||
| 133 | defstab = stabent("_",TRUE); | |
| 134 | ||
| 135 | /* init tokener */ | |
| 136 | ||
| 137 | bufptr = str_get(linestr); | |
| 138 | ||
| 139 | /* now parse the report spec */ | |
| 140 | ||
| 141 | if (yyparse()) | |
| 142 | fatal("Execution aborted due to compilation errors.\n"); | |
| 143 | ||
| 144 | if (e_fp) { | |
| 145 | e_fp = Nullfp; | |
| 146 | UNLINK(e_tmpname); | |
| 147 | } | |
| 148 | argc--,argv++; /* skip name of script */ | |
| 149 | if (doswitches) { | |
| 150 | for (; argc > 0 && **argv == '-'; argc--,argv++) { | |
| 151 | if (argv[0][1] == '-') { | |
| 152 | argc--,argv++; | |
| 153 | break; | |
| 154 | } | |
| 155 | str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0); | |
| 156 | } | |
| 157 | } | |
| 158 | if (argvstab = stabent("ARGV",FALSE)) { | |
| 159 | for (; argc > 0; argc--,argv++) { | |
| 160 | apush(argvstab->stab_array,str_make(argv[0])); | |
| 161 | } | |
| 162 | } | |
| 163 | if (envstab = stabent("ENV",FALSE)) { | |
| 164 | for (; *env; env++) { | |
| 165 | if (!(s = index(*env,'='))) | |
| 166 | continue; | |
| 167 | *s++ = '\0'; | |
| 168 | str = str_make(s); | |
| 169 | str->str_link.str_magic = envstab; | |
| 170 | hstore(envstab->stab_hash,*env,str); | |
| 171 | *--s = '='; | |
| 172 | } | |
| 173 | } | |
| 174 | sigstab = stabent("SIG",FALSE); | |
| 175 | ||
| 176 | magicalize("!#?^~=-%0123456789.+&*(),\\/[|"); | |
| 177 | ||
| 178 | (tmpstab = stabent("0",FALSE)) && str_set(STAB_STR(tmpstab),filename); | |
| 179 | (tmpstab = stabent("$",FALSE)) && | |
| 180 | str_numset(STAB_STR(tmpstab),(double)getpid()); | |
| 181 | ||
| 182 | tmpstab = stabent("stdin",TRUE); | |
| 183 | tmpstab->stab_io = stio_new(); | |
| 184 | tmpstab->stab_io->fp = stdin; | |
| 185 | ||
| 186 | tmpstab = stabent("stdout",TRUE); | |
| 187 | tmpstab->stab_io = stio_new(); | |
| 188 | tmpstab->stab_io->fp = stdout; | |
| 189 | defoutstab = tmpstab; | |
| 190 | curoutstab = tmpstab; | |
| 191 | ||
| 192 | tmpstab = stabent("stderr",TRUE); | |
| 193 | tmpstab->stab_io = stio_new(); | |
| 194 | tmpstab->stab_io->fp = stderr; | |
| 195 | ||
| 196 | setjmp(top_env); /* sets goto_targ on longjump */ | |
| 197 | ||
| 198 | #ifdef DEBUGGING | |
| 199 | if (debug & 1024) | |
| 200 | dump_cmd(main_root,Nullcmd); | |
| 201 | if (debug) | |
| 202 | fprintf(stderr,"\nEXECUTING...\n\n"); | |
| 203 | #endif | |
| 204 | ||
| 205 | /* do it */ | |
| 206 | ||
| 207 | (void) cmd_exec(main_root); | |
| 208 | ||
| 209 | if (goto_targ) | |
| 210 | fatal("Can't find label \"%s\"--aborting.\n",goto_targ); | |
| 211 | exit(0); | |
| 212 | } | |
| 213 | ||
| 214 | magicalize(list) | |
| 215 | register char *list; | |
| 216 | { | |
| 217 | register STAB *stab; | |
| 218 | char sym[2]; | |
| 219 | ||
| 220 | sym[1] = '\0'; | |
| 221 | while (*sym = *list++) { | |
| 222 | if (stab = stabent(sym,FALSE)) { | |
| 223 | stab->stab_flags = SF_VMAGIC; | |
| 224 | stab->stab_val->str_link.str_magic = stab; | |
| 225 | } | |
| 226 | } | |
| 227 | } | |
| 228 | ||
| 229 | #define RETURN(retval) return (bufptr = s,retval) | |
| 230 | #define OPERATOR(retval) return (expectterm = TRUE,bufptr = s,retval) | |
| 231 | #define TERM(retval) return (expectterm = FALSE,bufptr = s,retval) | |
| 232 | #define LOOPX(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,LOOPEX) | |
| 233 | #define UNI(f) return (yylval.ival = f,expectterm = TRUE,bufptr = s,UNIOP) | |
| 234 | #define FUN0(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC0) | |
| 235 | #define FUN1(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC1) | |
| 236 | #define FUN2(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC2) | |
| 237 | #define FUN3(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC3) | |
| 238 | #define SFUN(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,STABFUN) | |
| 239 | ||
| 240 | yylex() | |
| 241 | { | |
| 242 | register char *s = bufptr; | |
| 243 | register char *d; | |
| 244 | register int tmp; | |
| 245 | static bool in_format = FALSE; | |
| 246 | static bool firstline = TRUE; | |
| 247 | ||
| 248 | retry: | |
| 249 | #ifdef YYDEBUG | |
| 250 | if (yydebug) | |
| 251 | if (index(s,'\n')) | |
| 252 | fprintf(stderr,"Tokener at %s",s); | |
| 253 | else | |
| 254 | fprintf(stderr,"Tokener at %s\n",s); | |
| 255 | #endif | |
| 256 | switch (*s) { | |
| 257 | default: | |
| 258 | fprintf(stderr, | |
| 259 | "Unrecognized character %c in file %s line %d--ignoring.\n", | |
| 260 | *s++,filename,line); | |
| 261 | goto retry; | |
| 262 | case 0: | |
| 263 | s = str_get(linestr); | |
| 264 | *s = '\0'; | |
| 265 | if (firstline && (assume_n || assume_p)) { | |
| 266 | firstline = FALSE; | |
| 267 | str_set(linestr,"while (<>) {"); | |
| 268 | s = str_get(linestr); | |
| 269 | goto retry; | |
| 270 | } | |
| 271 | if (!rsfp) | |
| 272 | RETURN(0); | |
| 273 | if (in_format) { | |
| 274 | yylval.formval = load_format(); /* leaves . in buffer */ | |
| 275 | in_format = FALSE; | |
| 276 | s = str_get(linestr); | |
| 277 | TERM(FORMLIST); | |
| 278 | } | |
| 279 | line++; | |
| 280 | if ((s = str_gets(linestr, rsfp)) == Nullch) { | |
| 281 | if (preprocess) | |
| 282 | pclose(rsfp); | |
| 283 | else if (rsfp != stdin) | |
| 284 | fclose(rsfp); | |
| 285 | rsfp = Nullfp; | |
| 286 | if (assume_n || assume_p) { | |
| 287 | str_set(linestr,assume_p ? "}continue{print;" : ""); | |
| 288 | str_cat(linestr,"}"); | |
| 289 | s = str_get(linestr); | |
| 290 | goto retry; | |
| 291 | } | |
| 292 | s = str_get(linestr); | |
| 293 | RETURN(0); | |
| 294 | } | |
| 295 | #ifdef DEBUG | |
| 296 | else if (firstline) { | |
| 297 | char *showinput(); | |
| 298 | s = showinput(); | |
| 299 | } | |
| 300 | #endif | |
| 301 | firstline = FALSE; | |
| 302 | goto retry; | |
| 303 | case ' ': case '\t': | |
| 304 | s++; | |
| 305 | goto retry; | |
| 306 | case '\n': | |
| 307 | case '#': | |
| 308 | if (preprocess && s == str_get(linestr) && | |
| 309 | s[1] == ' ' && isdigit(s[2])) { | |
| 310 | line = atoi(s+2)-1; | |
| 311 | for (s += 2; isdigit(*s); s++) ; | |
| 312 | while (*s && isspace(*s)) s++; | |
| 313 | if (filename) | |
| 314 | safefree(filename); | |
| 315 | s[strlen(s)-1] = '\0'; /* wipe out newline */ | |
| 316 | filename = savestr(s); | |
| 317 | s = str_get(linestr); | |
| 318 | } | |
| 319 | *s = '\0'; | |
| 320 | if (lex_newlines) | |
| 321 | RETURN('\n'); | |
| 322 | goto retry; | |
| 323 | case '+': | |
| 324 | case '-': | |
| 325 | if (s[1] == *s) { | |
| 326 | s++; | |
| 327 | if (*s++ == '+') | |
| 328 | RETURN(INC); | |
| 329 | else | |
| 330 | RETURN(DEC); | |
| 331 | } | |
| 332 | /* FALL THROUGH */ | |
| 333 | case '*': | |
| 334 | case '%': | |
| 335 | case '^': | |
| 336 | case '~': | |
| 337 | case '(': | |
| 338 | case ',': | |
| 339 | case ':': | |
| 340 | case ';': | |
| 341 | case '{': | |
| 342 | case '[': | |
| 343 | tmp = *s++; | |
| 344 | OPERATOR(tmp); | |
| 345 | case ')': | |
| 346 | case ']': | |
| 347 | case '}': | |
| 348 | tmp = *s++; | |
| 349 | TERM(tmp); | |
| 350 | case '&': | |
| 351 | s++; | |
| 352 | tmp = *s++; | |
| 353 | if (tmp == '&') | |
| 354 | OPERATOR(ANDAND); | |
| 355 | s--; | |
| 356 | OPERATOR('&'); | |
| 357 | case '|': | |
| 358 | s++; | |
| 359 | tmp = *s++; | |
| 360 | if (tmp == '|') | |
| 361 | OPERATOR(OROR); | |
| 362 | s--; | |
| 363 | OPERATOR('|'); | |
| 364 | case '=': | |
| 365 | s++; | |
| 366 | tmp = *s++; | |
| 367 | if (tmp == '=') | |
| 368 | OPERATOR(EQ); | |
| 369 | if (tmp == '~') | |
| 370 | OPERATOR(MATCH); | |
| 371 | s--; | |
| 372 | OPERATOR('='); | |
| 373 | case '!': | |
| 374 | s++; | |
| 375 | tmp = *s++; | |
| 376 | if (tmp == '=') | |
| 377 | OPERATOR(NE); | |
| 378 | if (tmp == '~') | |
| 379 | OPERATOR(NMATCH); | |
| 380 | s--; | |
| 381 | OPERATOR('!'); | |
| 382 | case '<': | |
| 383 | if (expectterm) { | |
| 384 | s = scanstr(s); | |
| 385 | TERM(RSTRING); | |
| 386 | } | |
| 387 | s++; | |
| 388 | tmp = *s++; | |
| 389 | if (tmp == '<') | |
| 390 | OPERATOR(LS); | |
| 391 | if (tmp == '=') | |
| 392 | OPERATOR(LE); | |
| 393 | s--; | |
| 394 | OPERATOR('<'); | |
| 395 | case '>': | |
| 396 | s++; | |
| 397 | tmp = *s++; | |
| 398 | if (tmp == '>') | |
| 399 | OPERATOR(RS); | |
| 400 | if (tmp == '=') | |
| 401 | OPERATOR(GE); | |
| 402 | s--; | |
| 403 | OPERATOR('>'); | |
| 404 | ||
| 405 | #define SNARFWORD \ | |
| 406 | d = tokenbuf; \ | |
| 407 | while (isalpha(*s) || isdigit(*s) || *s == '_') \ | |
| 408 | *d++ = *s++; \ | |
| 409 | *d = '\0'; \ | |
| 410 | d = tokenbuf; | |
| 411 | ||
| 412 | case '$': | |
| 413 | if (s[1] == '#' && (isalpha(s[2]) || s[2] == '_')) { | |
| 414 | s++; | |
| 415 | s = scanreg(s,tokenbuf); | |
| 416 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); | |
| 417 | TERM(ARYLEN); | |
| 418 | } | |
| 419 | s = scanreg(s,tokenbuf); | |
| 420 | yylval.stabval = stabent(tokenbuf,TRUE); | |
| 421 | TERM(REG); | |
| 422 | ||
| 423 | case '@': | |
| 424 | s = scanreg(s,tokenbuf); | |
| 425 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); | |
| 426 | TERM(ARY); | |
| 427 | ||
| 428 | case '/': /* may either be division or pattern */ | |
| 429 | case '?': /* may either be conditional or pattern */ | |
| 430 | if (expectterm) { | |
| 431 | s = scanpat(s); | |
| 432 | TERM(PATTERN); | |
| 433 | } | |
| 434 | tmp = *s++; | |
| 435 | OPERATOR(tmp); | |
| 436 | ||
| 437 | case '.': | |
| 438 | if (!expectterm || !isdigit(s[1])) { | |
| 439 | s++; | |
| 440 | tmp = *s++; | |
| 441 | if (tmp == '.') | |
| 442 | OPERATOR(DOTDOT); | |
| 443 | s--; | |
| 444 | OPERATOR('.'); | |
| 445 | } | |
| 446 | /* FALL THROUGH */ | |
| 447 | case '0': case '1': case '2': case '3': case '4': | |
| 448 | case '5': case '6': case '7': case '8': case '9': | |
| 449 | case '\'': case '"': case '`': | |
| 450 | s = scanstr(s); | |
| 451 | TERM(RSTRING); | |
| 452 | ||
| 453 | case '_': | |
| 454 | SNARFWORD; | |
| 455 | yylval.cval = savestr(d); | |
| 456 | OPERATOR(WORD); | |
| 457 | case 'a': case 'A': | |
| 458 | SNARFWORD; | |
| 459 | yylval.cval = savestr(d); | |
| 460 | OPERATOR(WORD); | |
| 461 | case 'b': case 'B': | |
| 462 | SNARFWORD; | |
| 463 | yylval.cval = savestr(d); | |
| 464 | OPERATOR(WORD); | |
| 465 | case 'c': case 'C': | |
| 466 | SNARFWORD; | |
| 467 | if (strEQ(d,"continue")) | |
| 468 | OPERATOR(CONTINUE); | |
| 469 | if (strEQ(d,"chdir")) | |
| 470 | UNI(O_CHDIR); | |
| 471 | if (strEQ(d,"close")) | |
| 472 | OPERATOR(CLOSE); | |
| 473 | if (strEQ(d,"crypt")) | |
| 474 | FUN2(O_CRYPT); | |
| 475 | if (strEQ(d,"chop")) | |
| 476 | OPERATOR(CHOP); | |
| 477 | if (strEQ(d,"chmod")) { | |
| 478 | yylval.ival = O_CHMOD; | |
| 479 | OPERATOR(PRINT); | |
| 480 | } | |
| 481 | if (strEQ(d,"chown")) { | |
| 482 | yylval.ival = O_CHOWN; | |
| 483 | OPERATOR(PRINT); | |
| 484 | } | |
| 485 | yylval.cval = savestr(d); | |
| 486 | OPERATOR(WORD); | |
| 487 | case 'd': case 'D': | |
| 488 | SNARFWORD; | |
| 489 | if (strEQ(d,"do")) | |
| 490 | OPERATOR(DO); | |
| 491 | if (strEQ(d,"die")) | |
| 492 | UNI(O_DIE); | |
| 493 | yylval.cval = savestr(d); | |
| 494 | OPERATOR(WORD); | |
| 495 | case 'e': case 'E': | |
| 496 | SNARFWORD; | |
| 497 | if (strEQ(d,"else")) | |
| 498 | OPERATOR(ELSE); | |
| 499 | if (strEQ(d,"elsif")) | |
| 500 | OPERATOR(ELSIF); | |
| 501 | if (strEQ(d,"eq") || strEQ(d,"EQ")) | |
| 502 | OPERATOR(SEQ); | |
| 503 | if (strEQ(d,"exit")) | |
| 504 | UNI(O_EXIT); | |
| 505 | if (strEQ(d,"eof")) | |
| 506 | TERM(FEOF); | |
| 507 | if (strEQ(d,"exp")) | |
| 508 | FUN1(O_EXP); | |
| 509 | if (strEQ(d,"each")) | |
| 510 | SFUN(O_EACH); | |
| 511 | if (strEQ(d,"exec")) { | |
| 512 | yylval.ival = O_EXEC; | |
| 513 | OPERATOR(PRINT); | |
| 514 | } | |
| 515 | yylval.cval = savestr(d); | |
| 516 | OPERATOR(WORD); | |
| 517 | case 'f': case 'F': | |
| 518 | SNARFWORD; | |
| 519 | if (strEQ(d,"for")) | |
| 520 | OPERATOR(FOR); | |
| 521 | if (strEQ(d,"format")) { | |
| 522 | in_format = TRUE; | |
| 523 | OPERATOR(FORMAT); | |
| 524 | } | |
| 525 | if (strEQ(d,"fork")) | |
| 526 | FUN0(O_FORK); | |
| 527 | yylval.cval = savestr(d); | |
| 528 | OPERATOR(WORD); | |
| 529 | case 'g': case 'G': | |
| 530 | SNARFWORD; | |
| 531 | if (strEQ(d,"gt") || strEQ(d,"GT")) | |
| 532 | OPERATOR(SGT); | |
| 533 | if (strEQ(d,"ge") || strEQ(d,"GE")) | |
| 534 | OPERATOR(SGE); | |
| 535 | if (strEQ(d,"goto")) | |
| 536 | LOOPX(O_GOTO); | |
| 537 | if (strEQ(d,"gmtime")) | |
| 538 | FUN1(O_GMTIME); | |
| 539 | yylval.cval = savestr(d); | |
| 540 | OPERATOR(WORD); | |
| 541 | case 'h': case 'H': | |
| 542 | SNARFWORD; | |
| 543 | if (strEQ(d,"hex")) | |
| 544 | FUN1(O_HEX); | |
| 545 | yylval.cval = savestr(d); | |
| 546 | OPERATOR(WORD); | |
| 547 | case 'i': case 'I': | |
| 548 | SNARFWORD; | |
| 549 | if (strEQ(d,"if")) | |
| 550 | OPERATOR(IF); | |
| 551 | if (strEQ(d,"index")) | |
| 552 | FUN2(O_INDEX); | |
| 553 | if (strEQ(d,"int")) | |
| 554 | FUN1(O_INT); | |
| 555 | yylval.cval = savestr(d); | |
| 556 | OPERATOR(WORD); | |
| 557 | case 'j': case 'J': | |
| 558 | SNARFWORD; | |
| 559 | if (strEQ(d,"join")) | |
| 560 | OPERATOR(JOIN); | |
| 561 | yylval.cval = savestr(d); | |
| 562 | OPERATOR(WORD); | |
| 563 | case 'k': case 'K': | |
| 564 | SNARFWORD; | |
| 565 | if (strEQ(d,"keys")) | |
| 566 | SFUN(O_KEYS); | |
| 567 | if (strEQ(d,"kill")) { | |
| 568 | yylval.ival = O_KILL; | |
| 569 | OPERATOR(PRINT); | |
| 570 | } | |
| 571 | yylval.cval = savestr(d); | |
| 572 | OPERATOR(WORD); | |
| 573 | case 'l': case 'L': | |
| 574 | SNARFWORD; | |
| 575 | if (strEQ(d,"last")) | |
| 576 | LOOPX(O_LAST); | |
| 577 | if (strEQ(d,"length")) | |
| 578 | FUN1(O_LENGTH); | |
| 579 | if (strEQ(d,"lt") || strEQ(d,"LT")) | |
| 580 | OPERATOR(SLT); | |
| 581 | if (strEQ(d,"le") || strEQ(d,"LE")) | |
| 582 | OPERATOR(SLE); | |
| 583 | if (strEQ(d,"localtime")) | |
| 584 | FUN1(O_LOCALTIME); | |
| 585 | if (strEQ(d,"log")) | |
| 586 | FUN1(O_LOG); | |
| 587 | if (strEQ(d,"link")) | |
| 588 | FUN2(O_LINK); | |
| 589 | yylval.cval = savestr(d); | |
| 590 | OPERATOR(WORD); | |
| 591 | case 'm': case 'M': | |
| 592 | SNARFWORD; | |
| 593 | if (strEQ(d,"m")) { | |
| 594 | s = scanpat(s-1); | |
| 595 | TERM(PATTERN); | |
| 596 | } | |
| 597 | yylval.cval = savestr(d); | |
| 598 | OPERATOR(WORD); | |
| 599 | case 'n': case 'N': | |
| 600 | SNARFWORD; | |
| 601 | if (strEQ(d,"next")) | |
| 602 | LOOPX(O_NEXT); | |
| 603 | if (strEQ(d,"ne") || strEQ(d,"NE")) | |
| 604 | OPERATOR(SNE); | |
| 605 | yylval.cval = savestr(d); | |
| 606 | OPERATOR(WORD); | |
| 607 | case 'o': case 'O': | |
| 608 | SNARFWORD; | |
| 609 | if (strEQ(d,"open")) | |
| 610 | OPERATOR(OPEN); | |
| 611 | if (strEQ(d,"ord")) | |
| 612 | FUN1(O_ORD); | |
| 613 | if (strEQ(d,"oct")) | |
| 614 | FUN1(O_OCT); | |
| 615 | yylval.cval = savestr(d); | |
| 616 | OPERATOR(WORD); | |
| 617 | case 'p': case 'P': | |
| 618 | SNARFWORD; | |
| 619 | if (strEQ(d,"print")) { | |
| 620 | yylval.ival = O_PRINT; | |
| 621 | OPERATOR(PRINT); | |
| 622 | } | |
| 623 | if (strEQ(d,"printf")) { | |
| 624 | yylval.ival = O_PRTF; | |
| 625 | OPERATOR(PRINT); | |
| 626 | } | |
| 627 | if (strEQ(d,"push")) { | |
| 628 | yylval.ival = O_PUSH; | |
| 629 | OPERATOR(PUSH); | |
| 630 | } | |
| 631 | if (strEQ(d,"pop")) | |
| 632 | OPERATOR(POP); | |
| 633 | yylval.cval = savestr(d); | |
| 634 | OPERATOR(WORD); | |
| 635 | case 'q': case 'Q': | |
| 636 | SNARFWORD; | |
| 637 | yylval.cval = savestr(d); | |
| 638 | OPERATOR(WORD); | |
| 639 | case 'r': case 'R': | |
| 640 | SNARFWORD; | |
| 641 | if (strEQ(d,"reset")) | |
| 642 | UNI(O_RESET); | |
| 643 | if (strEQ(d,"redo")) | |
| 644 | LOOPX(O_REDO); | |
| 645 | if (strEQ(d,"rename")) | |
| 646 | FUN2(O_RENAME); | |
| 647 | yylval.cval = savestr(d); | |
| 648 | OPERATOR(WORD); | |
| 649 | case 's': case 'S': | |
| 650 | SNARFWORD; | |
| 651 | if (strEQ(d,"s")) { | |
| 652 | s = scansubst(s); | |
| 653 | TERM(SUBST); | |
| 654 | } | |
| 655 | if (strEQ(d,"shift")) | |
| 656 | TERM(SHIFT); | |
| 657 | if (strEQ(d,"split")) | |
| 658 | TERM(SPLIT); | |
| 659 | if (strEQ(d,"substr")) | |
| 660 | FUN3(O_SUBSTR); | |
| 661 | if (strEQ(d,"sprintf")) | |
| 662 | OPERATOR(SPRINTF); | |
| 663 | if (strEQ(d,"sub")) | |
| 664 | OPERATOR(SUB); | |
| 665 | if (strEQ(d,"select")) | |
| 666 | OPERATOR(SELECT); | |
| 667 | if (strEQ(d,"seek")) | |
| 668 | OPERATOR(SEEK); | |
| 669 | if (strEQ(d,"stat")) | |
| 670 | OPERATOR(STAT); | |
| 671 | if (strEQ(d,"sqrt")) | |
| 672 | FUN1(O_SQRT); | |
| 673 | if (strEQ(d,"sleep")) | |
| 674 | UNI(O_SLEEP); | |
| 675 | if (strEQ(d,"system")) { | |
| 676 | yylval.ival = O_SYSTEM; | |
| 677 | OPERATOR(PRINT); | |
| 678 | } | |
| 679 | yylval.cval = savestr(d); | |
| 680 | OPERATOR(WORD); | |
| 681 | case 't': case 'T': | |
| 682 | SNARFWORD; | |
| 683 | if (strEQ(d,"tr")) { | |
| 684 | s = scantrans(s); | |
| 685 | TERM(TRANS); | |
| 686 | } | |
| 687 | if (strEQ(d,"tell")) | |
| 688 | TERM(TELL); | |
| 689 | if (strEQ(d,"time")) | |
| 690 | FUN0(O_TIME); | |
| 691 | if (strEQ(d,"times")) | |
| 692 | FUN0(O_TMS); | |
| 693 | yylval.cval = savestr(d); | |
| 694 | OPERATOR(WORD); | |
| 695 | case 'u': case 'U': | |
| 696 | SNARFWORD; | |
| 697 | if (strEQ(d,"using")) | |
| 698 | OPERATOR(USING); | |
| 699 | if (strEQ(d,"until")) | |
| 700 | OPERATOR(UNTIL); | |
| 701 | if (strEQ(d,"unless")) | |
| 702 | OPERATOR(UNLESS); | |
| 703 | if (strEQ(d,"umask")) | |
| 704 | FUN1(O_UMASK); | |
| 705 | if (strEQ(d,"unshift")) { | |
| 706 | yylval.ival = O_UNSHIFT; | |
| 707 | OPERATOR(PUSH); | |
| 708 | } | |
| 709 | if (strEQ(d,"unlink")) { | |
| 710 | yylval.ival = O_UNLINK; | |
| 711 | OPERATOR(PRINT); | |
| 712 | } | |
| 713 | yylval.cval = savestr(d); | |
| 714 | OPERATOR(WORD); | |
| 715 | case 'v': case 'V': | |
| 716 | SNARFWORD; | |
| 717 | if (strEQ(d,"values")) | |
| 718 | SFUN(O_VALUES); | |
| 719 | yylval.cval = savestr(d); | |
| 720 | OPERATOR(WORD); | |
| 721 | case 'w': case 'W': | |
| 722 | SNARFWORD; | |
| 723 | if (strEQ(d,"write")) | |
| 724 | TERM(WRITE); | |
| 725 | if (strEQ(d,"while")) | |
| 726 | OPERATOR(WHILE); | |
| 727 | yylval.cval = savestr(d); | |
| 728 | OPERATOR(WORD); | |
| 729 | case 'x': case 'X': | |
| 730 | SNARFWORD; | |
| 731 | if (!expectterm && strEQ(d,"x")) | |
| 732 | OPERATOR('x'); | |
| 733 | yylval.cval = savestr(d); | |
| 734 | OPERATOR(WORD); | |
| 735 | case 'y': case 'Y': | |
| 736 | SNARFWORD; | |
| 737 | if (strEQ(d,"y")) { | |
| 738 | s = scantrans(s); | |
| 739 | TERM(TRANS); | |
| 740 | } | |
| 741 | yylval.cval = savestr(d); | |
| 742 | OPERATOR(WORD); | |
| 743 | case 'z': case 'Z': | |
| 744 | SNARFWORD; | |
| 745 | yylval.cval = savestr(d); | |
| 746 | OPERATOR(WORD); | |
| 747 | } | |
| 748 | } | |
| 749 | ||
| 750 | STAB * | |
| 751 | stabent(name,add) | |
| 752 | register char *name; | |
| 753 | int add; | |
| 754 | { | |
| 755 | register STAB *stab; | |
| 756 | ||
| 757 | for (stab = stab_index[*name]; stab; stab = stab->stab_next) { | |
| 758 | if (strEQ(name,stab->stab_name)) | |
| 759 | return stab; | |
| 760 | } | |
| 761 | ||
| 762 | /* no entry--should we add one? */ | |
| 763 | ||
| 764 | if (add) { | |
| 765 | stab = (STAB *) safemalloc(sizeof(STAB)); | |
| 766 | bzero((char*)stab, sizeof(STAB)); | |
| 767 | stab->stab_name = savestr(name); | |
| 768 | stab->stab_val = str_new(0); | |
| 769 | stab->stab_next = stab_index[*name]; | |
| 770 | stab_index[*name] = stab; | |
| 771 | return stab; | |
| 772 | } | |
| 773 | return Nullstab; | |
| 774 | } | |
| 775 | ||
| 776 | STIO * | |
| 777 | stio_new() | |
| 778 | { | |
| 779 | STIO *stio = (STIO *) safemalloc(sizeof(STIO)); | |
| 780 | ||
| 781 | bzero((char*)stio, sizeof(STIO)); | |
| 782 | stio->page_len = 60; | |
| 783 | return stio; | |
| 784 | } | |
| 785 | ||
| 786 | char * | |
| 787 | scanreg(s,dest) | |
| 788 | register char *s; | |
| 789 | char *dest; | |
| 790 | { | |
| 791 | register char *d; | |
| 792 | ||
| 793 | s++; | |
| 794 | d = dest; | |
| 795 | while (isalpha(*s) || isdigit(*s) || *s == '_') | |
| 796 | *d++ = *s++; | |
| 797 | *d = '\0'; | |
| 798 | d = dest; | |
| 799 | if (!*d) { | |
| 800 | *d = *s++; | |
| 801 | if (*d == '{') { | |
| 802 | d = dest; | |
| 803 | while (*s && *s != '}') | |
| 804 | *d++ = *s++; | |
| 805 | *d = '\0'; | |
| 806 | d = dest; | |
| 807 | if (*s) | |
| 808 | s++; | |
| 809 | } | |
| 810 | else | |
| 811 | d[1] = '\0'; | |
| 812 | } | |
| 813 | if (*d == '^' && !isspace(*s)) | |
| 814 | *d = *s++ & 31; | |
| 815 | return s; | |
| 816 | } | |
| 817 | ||
| 818 | STR * | |
| 819 | scanconst(string) | |
| 820 | char *string; | |
| 821 | { | |
| 822 | register STR *retstr; | |
| 823 | register char *t; | |
| 824 | register char *d; | |
| 825 | ||
| 826 | if (index(string,'|')) { | |
| 827 | return Nullstr; | |
| 828 | } | |
| 829 | retstr = str_make(string); | |
| 830 | t = str_get(retstr); | |
| 831 | for (d=t; *d; ) { | |
| 832 | switch (*d) { | |
| 833 | case '.': case '[': case '$': case '(': case ')': case '|': | |
| 834 | *d = '\0'; | |
| 835 | break; | |
| 836 | case '\\': | |
| 837 | if (index("wWbB0123456789",d[1])) { | |
| 838 | *d = '\0'; | |
| 839 | break; | |
| 840 | } | |
| 841 | strcpy(d,d+1); | |
| 842 | switch(*d) { | |
| 843 | case 'n': | |
| 844 | *d = '\n'; | |
| 845 | break; | |
| 846 | case 't': | |
| 847 | *d = '\t'; | |
| 848 | break; | |
| 849 | case 'f': | |
| 850 | *d = '\f'; | |
| 851 | break; | |
| 852 | case 'r': | |
| 853 | *d = '\r'; | |
| 854 | break; | |
| 855 | } | |
| 856 | /* FALL THROUGH */ | |
| 857 | default: | |
| 858 | if (d[1] == '*' || d[1] == '+' || d[1] == '?') { | |
| 859 | *d = '\0'; | |
| 860 | break; | |
| 861 | } | |
| 862 | d++; | |
| 863 | } | |
| 864 | } | |
| 865 | if (!*t) { | |
| 866 | str_free(retstr); | |
| 867 | return Nullstr; | |
| 868 | } | |
| 869 | retstr->str_cur = strlen(retstr->str_ptr); /* XXX cheating here */ | |
| 870 | return retstr; | |
| 871 | } | |
| 872 | ||
| 873 | char * | |
| 874 | scanpat(s) | |
| 875 | register char *s; | |
| 876 | { | |
| 877 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); | |
| 878 | register char *d; | |
| 879 | ||
| 880 | bzero((char *)spat, sizeof(SPAT)); | |
| 881 | spat->spat_next = spat_root; /* link into spat list */ | |
| 882 | spat_root = spat; | |
| 883 | init_compex(&spat->spat_compex); | |
| 884 | ||
| 885 | switch (*s++) { | |
| 886 | case 'm': | |
| 887 | s++; | |
| 888 | break; | |
| 889 | case '/': | |
| 890 | break; | |
| 891 | case '?': | |
| 892 | spat->spat_flags |= SPAT_USE_ONCE; | |
| 893 | break; | |
| 894 | default: | |
| 895 | fatal("Search pattern not found:\n%s",str_get(linestr)); | |
| 896 | } | |
| 897 | s = cpytill(tokenbuf,s,s[-1]); | |
| 898 | if (!*s) | |
| 899 | fatal("Search pattern not terminated:\n%s",str_get(linestr)); | |
| 900 | s++; | |
| 901 | if (*tokenbuf == '^') { | |
| 902 | spat->spat_first = scanconst(tokenbuf+1); | |
| 903 | if (spat->spat_first) { | |
| 904 | spat->spat_flen = strlen(spat->spat_first->str_ptr); | |
| 905 | if (spat->spat_flen == strlen(tokenbuf+1)) | |
| 906 | spat->spat_flags |= SPAT_SCANALL; | |
| 907 | } | |
| 908 | } | |
| 909 | else { | |
| 910 | spat->spat_flags |= SPAT_SCANFIRST; | |
| 911 | spat->spat_first = scanconst(tokenbuf); | |
| 912 | if (spat->spat_first) { | |
| 913 | spat->spat_flen = strlen(spat->spat_first->str_ptr); | |
| 914 | if (spat->spat_flen == strlen(tokenbuf)) | |
| 915 | spat->spat_flags |= SPAT_SCANALL; | |
| 916 | } | |
| 917 | } | |
| 918 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) | |
| 919 | fatal(d); | |
| 920 | yylval.arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); | |
| 921 | return s; | |
| 922 | } | |
| 923 | ||
| 924 | char * | |
| 925 | scansubst(s) | |
| 926 | register char *s; | |
| 927 | { | |
| 928 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); | |
| 929 | register char *d; | |
| 930 | ||
| 931 | bzero((char *)spat, sizeof(SPAT)); | |
| 932 | spat->spat_next = spat_root; /* link into spat list */ | |
| 933 | spat_root = spat; | |
| 934 | init_compex(&spat->spat_compex); | |
| 935 | ||
| 936 | s = cpytill(tokenbuf,s+1,*s); | |
| 937 | if (!*s) | |
| 938 | fatal("Substitution pattern not terminated:\n%s",str_get(linestr)); | |
| 939 | for (d=tokenbuf; *d; d++) { | |
| 940 | if (*d == '$' && d[1] && d[-1] != '\\' && d[1] != '|') { | |
| 941 | register ARG *arg; | |
| 942 | ||
| 943 | spat->spat_runtime = arg = op_new(1); | |
| 944 | arg->arg_type = O_ITEM; | |
| 945 | arg[1].arg_type = A_DOUBLE; | |
| 946 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); | |
| 947 | goto get_repl; /* skip compiling for now */ | |
| 948 | } | |
| 949 | } | |
| 950 | if (*tokenbuf == '^') { | |
| 951 | spat->spat_first = scanconst(tokenbuf+1); | |
| 952 | if (spat->spat_first) | |
| 953 | spat->spat_flen = strlen(spat->spat_first->str_ptr); | |
| 954 | } | |
| 955 | else { | |
| 956 | spat->spat_flags |= SPAT_SCANFIRST; | |
| 957 | spat->spat_first = scanconst(tokenbuf); | |
| 958 | if (spat->spat_first) | |
| 959 | spat->spat_flen = strlen(spat->spat_first->str_ptr); | |
| 960 | } | |
| 961 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) | |
| 962 | fatal(d); | |
| 963 | get_repl: | |
| 964 | s = scanstr(s); | |
| 965 | if (!*s) | |
| 966 | fatal("Substitution replacement not terminated:\n%s",str_get(linestr)); | |
| 967 | spat->spat_repl = yylval.arg; | |
| 968 | if (*s == 'g') { | |
| 969 | s++; | |
| 970 | spat->spat_flags &= ~SPAT_USE_ONCE; | |
| 971 | } | |
| 972 | else | |
| 973 | spat->spat_flags |= SPAT_USE_ONCE; | |
| 974 | yylval.arg = make_match(O_SUBST,stab_to_arg(A_STAB,defstab),spat); | |
| 975 | return s; | |
| 976 | } | |
| 977 | ||
| 978 | ARG * | |
| 979 | make_split(stab,arg) | |
| 980 | register STAB *stab; | |
| 981 | register ARG *arg; | |
| 982 | { | |
| 983 | if (arg->arg_type != O_MATCH) { | |
| 984 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); | |
| 985 | register char *d; | |
| 986 | ||
| 987 | bzero((char *)spat, sizeof(SPAT)); | |
| 988 | spat->spat_next = spat_root; /* link into spat list */ | |
| 989 | spat_root = spat; | |
| 990 | init_compex(&spat->spat_compex); | |
| 991 | ||
| 992 | spat->spat_runtime = arg; | |
| 993 | arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); | |
| 994 | } | |
| 995 | arg->arg_type = O_SPLIT; | |
| 996 | arg[2].arg_ptr.arg_spat->spat_repl = stab_to_arg(A_STAB,aadd(stab)); | |
| 997 | return arg; | |
| 998 | } | |
| 999 | ||
| 1000 | char * | |
| 1001 | expand_charset(s) | |
| 1002 | register char *s; | |
| 1003 | { | |
| 1004 | char t[512]; | |
| 1005 | register char *d = t; | |
| 1006 | register int i; | |
| 1007 | ||
| 1008 | while (*s) { | |
| 1009 | if (s[1] == '-' && s[2]) { | |
| 1010 | for (i = s[0]; i <= s[2]; i++) | |
| 1011 | *d++ = i; | |
| 1012 | s += 3; | |
| 1013 | } | |
| 1014 | else | |
| 1015 | *d++ = *s++; | |
| 1016 | } | |
| 1017 | *d = '\0'; | |
| 1018 | return savestr(t); | |
| 1019 | } | |
| 1020 | ||
| 1021 | char * | |
| 1022 | scantrans(s) | |
| 1023 | register char *s; | |
| 1024 | { | |
| 1025 | ARG *arg = | |
| 1026 | l(make_op(O_TRANS,2,stab_to_arg(A_STAB,defstab),Nullarg,Nullarg,0)); | |
| 1027 | register char *t; | |
| 1028 | register char *r; | |
| 1029 | register char *tbl = safemalloc(256); | |
| 1030 | register int i; | |
| 1031 | ||
| 1032 | arg[2].arg_type = A_NULL; | |
| 1033 | arg[2].arg_ptr.arg_cval = tbl; | |
| 1034 | for (i=0; i<256; i++) | |
| 1035 | tbl[i] = 0; | |
| 1036 | s = scanstr(s); | |
| 1037 | if (!*s) | |
| 1038 | fatal("Translation pattern not terminated:\n%s",str_get(linestr)); | |
| 1039 | t = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); | |
| 1040 | free_arg(yylval.arg); | |
| 1041 | s = scanstr(s-1); | |
| 1042 | if (!*s) | |
| 1043 | fatal("Translation replacement not terminated:\n%s",str_get(linestr)); | |
| 1044 | r = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); | |
| 1045 | free_arg(yylval.arg); | |
| 1046 | yylval.arg = arg; | |
| 1047 | if (!*r) { | |
| 1048 | safefree(r); | |
| 1049 | r = t; | |
| 1050 | } | |
| 1051 | for (i = 0; t[i]; i++) { | |
| 1052 | if (!r[i]) | |
| 1053 | r[i] = r[i-1]; | |
| 1054 | tbl[t[i] & 0377] = r[i]; | |
| 1055 | } | |
| 1056 | if (r != t) | |
| 1057 | safefree(r); | |
| 1058 | safefree(t); | |
| 1059 | return s; | |
| 1060 | } | |
| 1061 | ||
| 1062 | CMD * | |
| 1063 | block_head(tail) | |
| 1064 | register CMD *tail; | |
| 1065 | { | |
| 1066 | if (tail == Nullcmd) { | |
| 1067 | return tail; | |
| 1068 | } | |
| 1069 | return tail->c_head; | |
| 1070 | } | |
| 1071 | ||
| 1072 | CMD * | |
| 1073 | append_line(head,tail) | |
| 1074 | register CMD *head; | |
| 1075 | register CMD *tail; | |
| 1076 | { | |
| 1077 | if (tail == Nullcmd) | |
| 1078 | return head; | |
| 1079 | if (!tail->c_head) /* make sure tail is well formed */ | |
| 1080 | tail->c_head = tail; | |
| 1081 | if (head != Nullcmd) { | |
| 1082 | tail = tail->c_head; /* get to start of tail list */ | |
| 1083 | if (!head->c_head) | |
| 1084 | head->c_head = head; /* start a new head list */ | |
| 1085 | while (head->c_next) { | |
| 1086 | head->c_next->c_head = head->c_head; | |
| 1087 | head = head->c_next; /* get to end of head list */ | |
| 1088 | } | |
| 1089 | head->c_next = tail; /* link to end of old list */ | |
| 1090 | tail->c_head = head->c_head; /* propagate head pointer */ | |
| 1091 | } | |
| 1092 | while (tail->c_next) { | |
| 1093 | tail->c_next->c_head = tail->c_head; | |
| 1094 | tail = tail->c_next; | |
| 1095 | } | |
| 1096 | return tail; | |
| 1097 | } | |
| 1098 | ||
| 1099 | CMD * | |
| 1100 | make_acmd(type,stab,cond,arg) | |
| 1101 | int type; | |
| 1102 | STAB *stab; | |
| 1103 | ARG *cond; | |
| 1104 | ARG *arg; | |
| 1105 | { | |
| 1106 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); | |
| 1107 | ||
| 1108 | bzero((char *)cmd, sizeof(CMD)); | |
| 1109 | cmd->c_type = type; | |
| 1110 | cmd->ucmd.acmd.ac_stab = stab; | |
| 1111 | cmd->ucmd.acmd.ac_expr = arg; | |
| 1112 | cmd->c_expr = cond; | |
| 1113 | if (cond) { | |
| 1114 | opt_arg(cmd,1); | |
| 1115 | cmd->c_flags |= CF_COND; | |
| 1116 | } | |
| 1117 | return cmd; | |
| 1118 | } | |
| 1119 | ||
| 1120 | CMD * | |
| 1121 | make_ccmd(type,arg,cblock) | |
| 1122 | int type; | |
| 1123 | register ARG *arg; | |
| 1124 | struct compcmd cblock; | |
| 1125 | { | |
| 1126 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); | |
| 1127 | ||
| 1128 | bzero((char *)cmd, sizeof(CMD)); | |
| 1129 | cmd->c_type = type; | |
| 1130 | cmd->c_expr = arg; | |
| 1131 | cmd->ucmd.ccmd.cc_true = cblock.comp_true; | |
| 1132 | cmd->ucmd.ccmd.cc_alt = cblock.comp_alt; | |
| 1133 | if (arg) { | |
| 1134 | opt_arg(cmd,1); | |
| 1135 | cmd->c_flags |= CF_COND; | |
| 1136 | } | |
| 1137 | return cmd; | |
| 1138 | } | |
| 1139 | ||
| 1140 | void | |
| 1141 | opt_arg(cmd,fliporflop) | |
| 1142 | register CMD *cmd; | |
| 1143 | int fliporflop; | |
| 1144 | { | |
| 1145 | register ARG *arg; | |
| 1146 | int opt = CFT_EVAL; | |
| 1147 | int sure = 0; | |
| 1148 | ARG *arg2; | |
| 1149 | char *tmps; /* for True macro */ | |
| 1150 | int context = 0; /* 0 = normal, 1 = before &&, 2 = before || */ | |
| 1151 | int flp = fliporflop; | |
| 1152 | ||
| 1153 | if (!cmd) | |
| 1154 | return; | |
| 1155 | arg = cmd->c_expr; | |
| 1156 | ||
| 1157 | /* Turn "if (!expr)" into "unless (expr)" */ | |
| 1158 | ||
| 1159 | while (arg->arg_type == O_NOT && arg[1].arg_type == A_EXPR) { | |
| 1160 | cmd->c_flags ^= CF_INVERT; /* flip sense of cmd */ | |
| 1161 | cmd->c_expr = arg[1].arg_ptr.arg_arg; /* hoist the rest of expr */ | |
| 1162 | free_arg(arg); | |
| 1163 | arg = cmd->c_expr; /* here we go again */ | |
| 1164 | } | |
| 1165 | ||
| 1166 | if (!arg->arg_len) { /* sanity check */ | |
| 1167 | cmd->c_flags |= opt; | |
| 1168 | return; | |
| 1169 | } | |
| 1170 | ||
| 1171 | /* for "cond .. cond" we set up for the initial check */ | |
| 1172 | ||
| 1173 | if (arg->arg_type == O_FLIP) | |
| 1174 | context |= 4; | |
| 1175 | ||
| 1176 | /* for "cond && expr" and "cond || expr" we can ignore expr, sort of */ | |
| 1177 | ||
| 1178 | if (arg->arg_type == O_AND) | |
| 1179 | context |= 1; | |
| 1180 | else if (arg->arg_type == O_OR) | |
| 1181 | context |= 2; | |
| 1182 | if (context && arg[flp].arg_type == A_EXPR) { | |
| 1183 | arg = arg[flp].arg_ptr.arg_arg; | |
| 1184 | flp = 1; | |
| 1185 | } | |
| 1186 | ||
| 1187 | if (arg[flp].arg_flags & (AF_PRE|AF_POST)) { | |
| 1188 | cmd->c_flags |= opt; | |
| 1189 | return; /* side effect, can't optimize */ | |
| 1190 | } | |
| 1191 | ||
| 1192 | if (arg->arg_type == O_ITEM || arg->arg_type == O_FLIP || | |
| 1193 | arg->arg_type == O_AND || arg->arg_type == O_OR) { | |
| 1194 | if (arg[flp].arg_type == A_SINGLE) { | |
| 1195 | opt = (str_true(arg[flp].arg_ptr.arg_str) ? CFT_TRUE : CFT_FALSE); | |
| 1196 | cmd->c_first = arg[flp].arg_ptr.arg_str; | |
| 1197 | goto literal; | |
| 1198 | } | |
| 1199 | else if (arg[flp].arg_type == A_STAB || arg[flp].arg_type == A_LVAL) { | |
| 1200 | cmd->c_stab = arg[flp].arg_ptr.arg_stab; | |
| 1201 | opt = CFT_REG; | |
| 1202 | literal: | |
| 1203 | if (!context) { /* no && or ||? */ | |
| 1204 | free_arg(arg); | |
| 1205 | cmd->c_expr = Nullarg; | |
| 1206 | } | |
| 1207 | if (!(context & 1)) | |
| 1208 | cmd->c_flags |= CF_EQSURE; | |
| 1209 | if (!(context & 2)) | |
| 1210 | cmd->c_flags |= CF_NESURE; | |
| 1211 | } | |
| 1212 | } | |
| 1213 | else if (arg->arg_type == O_MATCH || arg->arg_type == O_SUBST || | |
| 1214 | arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) { | |
| 1215 | if ((arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && | |
| 1216 | arg[2].arg_type == A_SPAT && | |
| 1217 | arg[2].arg_ptr.arg_spat->spat_first ) { | |
| 1218 | cmd->c_stab = arg[1].arg_ptr.arg_stab; | |
| 1219 | cmd->c_first = arg[2].arg_ptr.arg_spat->spat_first; | |
| 1220 | cmd->c_flen = arg[2].arg_ptr.arg_spat->spat_flen; | |
| 1221 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANALL && | |
| 1222 | (arg->arg_type == O_MATCH || arg->arg_type == O_NMATCH) ) | |
| 1223 | sure |= CF_EQSURE; /* (SUBST must be forced even */ | |
| 1224 | /* if we know it will work.) */ | |
| 1225 | arg[2].arg_ptr.arg_spat->spat_first = Nullstr; | |
| 1226 | arg[2].arg_ptr.arg_spat->spat_flen = 0; /* only one chk */ | |
| 1227 | sure |= CF_NESURE; /* normally only sure if it fails */ | |
| 1228 | if (arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) | |
| 1229 | cmd->c_flags |= CF_FIRSTNEG; | |
| 1230 | if (context & 1) { /* only sure if thing is false */ | |
| 1231 | if (cmd->c_flags & CF_FIRSTNEG) | |
| 1232 | sure &= ~CF_NESURE; | |
| 1233 | else | |
| 1234 | sure &= ~CF_EQSURE; | |
| 1235 | } | |
| 1236 | else if (context & 2) { /* only sure if thing is true */ | |
| 1237 | if (cmd->c_flags & CF_FIRSTNEG) | |
| 1238 | sure &= ~CF_EQSURE; | |
| 1239 | else | |
| 1240 | sure &= ~CF_NESURE; | |
| 1241 | } | |
| 1242 | if (sure & (CF_EQSURE|CF_NESURE)) { /* if we know anything*/ | |
| 1243 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANFIRST) | |
| 1244 | opt = CFT_SCAN; | |
| 1245 | else | |
| 1246 | opt = CFT_ANCHOR; | |
| 1247 | if (sure == (CF_EQSURE|CF_NESURE) /* really sure? */ | |
| 1248 | && arg->arg_type == O_MATCH | |
| 1249 | && context & 4 | |
| 1250 | && fliporflop == 1) { | |
| 1251 | arg[2].arg_type = A_SINGLE; /* don't do twice */ | |
| 1252 | arg[2].arg_ptr.arg_str = &str_yes; | |
| 1253 | } | |
| 1254 | cmd->c_flags |= sure; | |
| 1255 | } | |
| 1256 | } | |
| 1257 | } | |
| 1258 | else if (arg->arg_type == O_SEQ || arg->arg_type == O_SNE || | |
| 1259 | arg->arg_type == O_SLT || arg->arg_type == O_SGT) { | |
| 1260 | if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) { | |
| 1261 | if (arg[2].arg_type == A_SINGLE) { | |
| 1262 | cmd->c_stab = arg[1].arg_ptr.arg_stab; | |
| 1263 | cmd->c_first = arg[2].arg_ptr.arg_str; | |
| 1264 | cmd->c_flen = 30000; | |
| 1265 | switch (arg->arg_type) { | |
| 1266 | case O_SLT: case O_SGT: | |
| 1267 | sure |= CF_EQSURE; | |
| 1268 | cmd->c_flags |= CF_FIRSTNEG; | |
| 1269 | break; | |
| 1270 | case O_SNE: | |
| 1271 | cmd->c_flags |= CF_FIRSTNEG; | |
| 1272 | /* FALL THROUGH */ | |
| 1273 | case O_SEQ: | |
| 1274 | sure |= CF_NESURE|CF_EQSURE; | |
| 1275 | break; | |
| 1276 | } | |
| 1277 | if (context & 1) { /* only sure if thing is false */ | |
| 1278 | if (cmd->c_flags & CF_FIRSTNEG) | |
| 1279 | sure &= ~CF_NESURE; | |
| 1280 | else | |
| 1281 | sure &= ~CF_EQSURE; | |
| 1282 | } | |
| 1283 | else if (context & 2) { /* only sure if thing is true */ | |
| 1284 | if (cmd->c_flags & CF_FIRSTNEG) | |
| 1285 | sure &= ~CF_EQSURE; | |
| 1286 | else | |
| 1287 | sure &= ~CF_NESURE; | |
| 1288 | } | |
| 1289 | if (sure & (CF_EQSURE|CF_NESURE)) { | |
| 1290 | opt = CFT_STROP; | |
| 1291 | cmd->c_flags |= sure; | |
| 1292 | } | |
| 1293 | } | |
| 1294 | } | |
| 1295 | } | |
| 1296 | else if (arg->arg_type == O_ASSIGN && | |
| 1297 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && | |
| 1298 | arg[1].arg_ptr.arg_stab == defstab && | |
| 1299 | arg[2].arg_type == A_EXPR ) { | |
| 1300 | arg2 = arg[2].arg_ptr.arg_arg; | |
| 1301 | if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) { | |
| 1302 | opt = CFT_GETS; | |
| 1303 | cmd->c_stab = arg2[1].arg_ptr.arg_stab; | |
| 1304 | if (!(arg2[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV)) { | |
| 1305 | free_arg(arg2); | |
| 1306 | free_arg(arg); | |
| 1307 | cmd->c_expr = Nullarg; | |
| 1308 | } | |
| 1309 | } | |
| 1310 | } | |
| 1311 | else if (arg->arg_type == O_CHOP && | |
| 1312 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) ) { | |
| 1313 | opt = CFT_CHOP; | |
| 1314 | cmd->c_stab = arg[1].arg_ptr.arg_stab; | |
| 1315 | free_arg(arg); | |
| 1316 | cmd->c_expr = Nullarg; | |
| 1317 | } | |
| 1318 | if (context & 4) | |
| 1319 | opt |= CF_FLIP; | |
| 1320 | cmd->c_flags |= opt; | |
| 1321 | ||
| 1322 | if (cmd->c_flags & CF_FLIP) { | |
| 1323 | if (fliporflop == 1) { | |
| 1324 | arg = cmd->c_expr; /* get back to O_FLIP arg */ | |
| 1325 | arg[3].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); | |
| 1326 | bcopy((char *)cmd, (char *)arg[3].arg_ptr.arg_cmd, sizeof(CMD)); | |
| 1327 | arg[4].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); | |
| 1328 | bcopy((char *)cmd, (char *)arg[4].arg_ptr.arg_cmd, sizeof(CMD)); | |
| 1329 | opt_arg(arg[4].arg_ptr.arg_cmd,2); | |
| 1330 | arg->arg_len = 2; /* this is a lie */ | |
| 1331 | } | |
| 1332 | else { | |
| 1333 | if ((opt & CF_OPTIMIZE) == CFT_EVAL) | |
| 1334 | cmd->c_flags = (cmd->c_flags & ~CF_OPTIMIZE) | CFT_UNFLIP; | |
| 1335 | } | |
| 1336 | } | |
| 1337 | } | |
| 1338 | ||
| 1339 | ARG * | |
| 1340 | mod_match(type,left,pat) | |
| 1341 | register ARG *left; | |
| 1342 | register ARG *pat; | |
| 1343 | { | |
| 1344 | ||
| 1345 | register SPAT *spat; | |
| 1346 | register ARG *newarg; | |
| 1347 | ||
| 1348 | if ((pat->arg_type == O_MATCH || | |
| 1349 | pat->arg_type == O_SUBST || | |
| 1350 | pat->arg_type == O_TRANS || | |
| 1351 | pat->arg_type == O_SPLIT | |
| 1352 | ) && | |
| 1353 | pat[1].arg_ptr.arg_stab == defstab ) { | |
| 1354 | switch (pat->arg_type) { | |
| 1355 | case O_MATCH: | |
| 1356 | newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH, | |
| 1357 | pat->arg_len, | |
| 1358 | left,Nullarg,Nullarg,0); | |
| 1359 | break; | |
| 1360 | case O_SUBST: | |
| 1361 | newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST, | |
| 1362 | pat->arg_len, | |
| 1363 | left,Nullarg,Nullarg,0)); | |
| 1364 | break; | |
| 1365 | case O_TRANS: | |
| 1366 | newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS, | |
| 1367 | pat->arg_len, | |
| 1368 | left,Nullarg,Nullarg,0)); | |
| 1369 | break; | |
| 1370 | case O_SPLIT: | |
| 1371 | newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT, | |
| 1372 | pat->arg_len, | |
| 1373 | left,Nullarg,Nullarg,0); | |
| 1374 | break; | |
| 1375 | } | |
| 1376 | if (pat->arg_len >= 2) { | |
| 1377 | newarg[2].arg_type = pat[2].arg_type; | |
| 1378 | newarg[2].arg_ptr = pat[2].arg_ptr; | |
| 1379 | newarg[2].arg_flags = pat[2].arg_flags; | |
| 1380 | if (pat->arg_len >= 3) { | |
| 1381 | newarg[3].arg_type = pat[3].arg_type; | |
| 1382 | newarg[3].arg_ptr = pat[3].arg_ptr; | |
| 1383 | newarg[3].arg_flags = pat[3].arg_flags; | |
| 1384 | } | |
| 1385 | } | |
| 1386 | safefree((char*)pat); | |
| 1387 | } | |
| 1388 | else { | |
| 1389 | spat = (SPAT *) safemalloc(sizeof (SPAT)); | |
| 1390 | bzero((char *)spat, sizeof(SPAT)); | |
| 1391 | spat->spat_next = spat_root; /* link into spat list */ | |
| 1392 | spat_root = spat; | |
| 1393 | init_compex(&spat->spat_compex); | |
| 1394 | ||
| 1395 | spat->spat_runtime = pat; | |
| 1396 | newarg = make_op(type,2,left,Nullarg,Nullarg,0); | |
| 1397 | newarg[2].arg_type = A_SPAT; | |
| 1398 | newarg[2].arg_ptr.arg_spat = spat; | |
| 1399 | newarg[2].arg_flags = AF_SPECIAL; | |
| 1400 | } | |
| 1401 | ||
| 1402 | return newarg; | |
| 1403 | } | |
| 1404 | ||
| 1405 | CMD * | |
| 1406 | add_label(lbl,cmd) | |
| 1407 | char *lbl; | |
| 1408 | register CMD *cmd; | |
| 1409 | { | |
| 1410 | if (cmd) | |
| 1411 | cmd->c_label = lbl; | |
| 1412 | return cmd; | |
| 1413 | } | |
| 1414 | ||
| 1415 | CMD * | |
| 1416 | addcond(cmd, arg) | |
| 1417 | register CMD *cmd; | |
| 1418 | register ARG *arg; | |
| 1419 | { | |
| 1420 | cmd->c_expr = arg; | |
| 1421 | opt_arg(cmd,1); | |
| 1422 | cmd->c_flags |= CF_COND; | |
| 1423 | return cmd; | |
| 1424 | } | |
| 1425 | ||
| 1426 | CMD * | |
| 1427 | addloop(cmd, arg) | |
| 1428 | register CMD *cmd; | |
| 1429 | register ARG *arg; | |
| 1430 | { | |
| 1431 | cmd->c_expr = arg; | |
| 1432 | opt_arg(cmd,1); | |
| 1433 | cmd->c_flags |= CF_COND|CF_LOOP; | |
| 1434 | if (cmd->c_type == C_BLOCK) | |
| 1435 | cmd->c_flags &= ~CF_COND; | |
| 1436 | else { | |
| 1437 | arg = cmd->ucmd.acmd.ac_expr; | |
| 1438 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_CMD) | |
| 1439 | cmd->c_flags &= ~CF_COND; /* "do {} while" happens at least once */ | |
| 1440 | if (arg && arg->arg_type == O_SUBR) | |
| 1441 | cmd->c_flags &= ~CF_COND; /* likewise for "do subr() while" */ | |
| 1442 | } | |
| 1443 | return cmd; | |
| 1444 | } | |
| 1445 | ||
| 1446 | CMD * | |
| 1447 | invert(cmd) | |
| 1448 | register CMD *cmd; | |
| 1449 | { | |
| 1450 | cmd->c_flags ^= CF_INVERT; | |
| 1451 | return cmd; | |
| 1452 | } | |
| 1453 | ||
| 1454 | yyerror(s) | |
| 1455 | char *s; | |
| 1456 | { | |
| 1457 | char tmpbuf[128]; | |
| 1458 | char *tname = tmpbuf; | |
| 1459 | ||
| 1460 | if (yychar > 256) { | |
| 1461 | tname = tokename[yychar-256]; | |
| 1462 | if (strEQ(tname,"word")) | |
| 1463 | strcpy(tname,tokenbuf); | |
| 1464 | else if (strEQ(tname,"register")) | |
| 1465 | sprintf(tname,"$%s",tokenbuf); | |
| 1466 | else if (strEQ(tname,"array_length")) | |
| 1467 | sprintf(tname,"$#%s",tokenbuf); | |
| 1468 | } | |
| 1469 | else if (!yychar) | |
| 1470 | strcpy(tname,"EOF"); | |
| 1471 | else if (yychar < 32) | |
| 1472 | sprintf(tname,"^%c",yychar+64); | |
| 1473 | else if (yychar == 127) | |
| 1474 | strcpy(tname,"^?"); | |
| 1475 | else | |
| 1476 | sprintf(tname,"%c",yychar); | |
| 1477 | printf("%s in file %s at line %d, next token \"%s\"\n", | |
| 1478 | s,filename,line,tname); | |
| 1479 | } | |
| 1480 | ||
| 1481 | char * | |
| 1482 | scanstr(s) | |
| 1483 | register char *s; | |
| 1484 | { | |
| 1485 | register char term; | |
| 1486 | register char *d; | |
| 1487 | register ARG *arg; | |
| 1488 | register bool makesingle = FALSE; | |
| 1489 | char *leave = "\\$nrtfb0123456789"; /* which backslash sequences to keep */ | |
| 1490 | ||
| 1491 | arg = op_new(1); | |
| 1492 | yylval.arg = arg; | |
| 1493 | arg->arg_type = O_ITEM; | |
| 1494 | ||
| 1495 | switch (*s) { | |
| 1496 | default: /* a substitution replacement */ | |
| 1497 | arg[1].arg_type = A_DOUBLE; | |
| 1498 | makesingle = TRUE; /* maybe disable runtime scanning */ | |
| 1499 | term = *s; | |
| 1500 | if (term == '\'') | |
| 1501 | leave = Nullch; | |
| 1502 | goto snarf_it; | |
| 1503 | case '0': | |
| 1504 | { | |
| 1505 | long i; | |
| 1506 | int shift; | |
| 1507 | ||
| 1508 | arg[1].arg_type = A_SINGLE; | |
| 1509 | if (s[1] == 'x') { | |
| 1510 | shift = 4; | |
| 1511 | s += 2; | |
| 1512 | } | |
| 1513 | else if (s[1] == '.') | |
| 1514 | goto decimal; | |
| 1515 | else | |
| 1516 | shift = 3; | |
| 1517 | i = 0; | |
| 1518 | for (;;) { | |
| 1519 | switch (*s) { | |
| 1520 | default: | |
| 1521 | goto out; | |
| 1522 | case '8': case '9': | |
| 1523 | if (shift != 4) | |
| 1524 | fatal("Illegal octal digit at line %d",line); | |
| 1525 | /* FALL THROUGH */ | |
| 1526 | case '0': case '1': case '2': case '3': case '4': | |
| 1527 | case '5': case '6': case '7': | |
| 1528 | i <<= shift; | |
| 1529 | i += *s++ & 15; | |
| 1530 | break; | |
| 1531 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |
| 1532 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
| 1533 | if (shift != 4) | |
| 1534 | goto out; | |
| 1535 | i <<= 4; | |
| 1536 | i += (*s++ & 7) + 9; | |
| 1537 | break; | |
| 1538 | } | |
| 1539 | } | |
| 1540 | out: | |
| 1541 | sprintf(tokenbuf,"%d",i); | |
| 1542 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); | |
| 1543 | } | |
| 1544 | break; | |
| 1545 | case '1': case '2': case '3': case '4': case '5': | |
| 1546 | case '6': case '7': case '8': case '9': case '.': | |
| 1547 | decimal: | |
| 1548 | arg[1].arg_type = A_SINGLE; | |
| 1549 | d = tokenbuf; | |
| 1550 | while (isdigit(*s) || *s == '_') | |
| 1551 | *d++ = *s++; | |
| 1552 | if (*s == '.' && index("0123456789eE",s[1])) | |
| 1553 | *d++ = *s++; | |
| 1554 | while (isdigit(*s) || *s == '_') | |
| 1555 | *d++ = *s++; | |
| 1556 | if (index("eE",*s) && index("+-0123456789",s[1])) | |
| 1557 | *d++ = *s++; | |
| 1558 | if (*s == '+' || *s == '-') | |
| 1559 | *d++ = *s++; | |
| 1560 | while (isdigit(*s)) | |
| 1561 | *d++ = *s++; | |
| 1562 | *d = '\0'; | |
| 1563 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); | |
| 1564 | break; | |
| 1565 | case '\'': | |
| 1566 | arg[1].arg_type = A_SINGLE; | |
| 1567 | term = *s; | |
| 1568 | leave = Nullch; | |
| 1569 | goto snarf_it; | |
| 1570 | ||
| 1571 | case '<': | |
| 1572 | arg[1].arg_type = A_READ; | |
| 1573 | s = cpytill(tokenbuf,s+1,'>'); | |
| 1574 | if (!*tokenbuf) | |
| 1575 | strcpy(tokenbuf,"ARGV"); | |
| 1576 | if (*s) | |
| 1577 | s++; | |
| 1578 | if (rsfp == stdin && strEQ(tokenbuf,"stdin")) | |
| 1579 | fatal("Can't get both program and data from <stdin>\n"); | |
| 1580 | arg[1].arg_ptr.arg_stab = stabent(tokenbuf,TRUE); | |
| 1581 | arg[1].arg_ptr.arg_stab->stab_io = stio_new(); | |
| 1582 | if (strEQ(tokenbuf,"ARGV")) { | |
| 1583 | aadd(arg[1].arg_ptr.arg_stab); | |
| 1584 | arg[1].arg_ptr.arg_stab->stab_io->flags |= IOF_ARGV|IOF_START; | |
| 1585 | } | |
| 1586 | break; | |
| 1587 | case '"': | |
| 1588 | arg[1].arg_type = A_DOUBLE; | |
| 1589 | makesingle = TRUE; /* maybe disable runtime scanning */ | |
| 1590 | term = *s; | |
| 1591 | goto snarf_it; | |
| 1592 | case '`': | |
| 1593 | arg[1].arg_type = A_BACKTICK; | |
| 1594 | term = *s; | |
| 1595 | snarf_it: | |
| 1596 | { | |
| 1597 | STR *tmpstr; | |
| 1598 | int sqstart = line; | |
| 1599 | char *tmps; | |
| 1600 | ||
| 1601 | tmpstr = str_new(strlen(s)); | |
| 1602 | s = str_append_till(tmpstr,s+1,term,leave); | |
| 1603 | while (!*s) { /* multiple line string? */ | |
| 1604 | s = str_gets(linestr, rsfp); | |
| 1605 | if (!*s) | |
| 1606 | fatal("EOF in string at line %d\n",sqstart); | |
| 1607 | line++; | |
| 1608 | s = str_append_till(tmpstr,s,term,leave); | |
| 1609 | } | |
| 1610 | s++; | |
| 1611 | if (term == '\'') { | |
| 1612 | arg[1].arg_ptr.arg_str = tmpstr; | |
| 1613 | break; | |
| 1614 | } | |
| 1615 | tmps = s; | |
| 1616 | s = d = tmpstr->str_ptr; /* assuming shrinkage only */ | |
| 1617 | while (*s) { | |
| 1618 | if (*s == '$' && s[1]) { | |
| 1619 | makesingle = FALSE; /* force interpretation */ | |
| 1620 | if (!isalpha(s[1])) { /* an internal register? */ | |
| 1621 | int len; | |
| 1622 | ||
| 1623 | len = scanreg(s,tokenbuf) - s; | |
| 1624 | stabent(tokenbuf,TRUE); /* make sure it's created */ | |
| 1625 | while (len--) | |
| 1626 | *d++ = *s++; | |
| 1627 | continue; | |
| 1628 | } | |
| 1629 | } | |
| 1630 | else if (*s == '\\' && s[1]) { | |
| 1631 | s++; | |
| 1632 | switch (*s) { | |
| 1633 | default: | |
| 1634 | defchar: | |
| 1635 | if (!leave || index(leave,*s)) | |
| 1636 | *d++ = '\\'; | |
| 1637 | *d++ = *s++; | |
| 1638 | continue; | |
| 1639 | case '0': case '1': case '2': case '3': | |
| 1640 | case '4': case '5': case '6': case '7': | |
| 1641 | *d = *s++ - '0'; | |
| 1642 | if (index("01234567",*s)) { | |
| 1643 | *d <<= 3; | |
| 1644 | *d += *s++ - '0'; | |
| 1645 | } | |
| 1646 | else if (!index('`"',term)) { /* oops, a subpattern */ | |
| 1647 | s--; | |
| 1648 | goto defchar; | |
| 1649 | } | |
| 1650 | if (index("01234567",*s)) { | |
| 1651 | *d <<= 3; | |
| 1652 | *d += *s++ - '0'; | |
| 1653 | } | |
| 1654 | d++; | |
| 1655 | continue; | |
| 1656 | case 'b': | |
| 1657 | *d++ = '\b'; | |
| 1658 | break; | |
| 1659 | case 'n': | |
| 1660 | *d++ = '\n'; | |
| 1661 | break; | |
| 1662 | case 'r': | |
| 1663 | *d++ = '\r'; | |
| 1664 | break; | |
| 1665 | case 'f': | |
| 1666 | *d++ = '\f'; | |
| 1667 | break; | |
| 1668 | case 't': | |
| 1669 | *d++ = '\t'; | |
| 1670 | break; | |
| 1671 | } | |
| 1672 | s++; | |
| 1673 | continue; | |
| 1674 | } | |
| 1675 | *d++ = *s++; | |
| 1676 | } | |
| 1677 | *d = '\0'; | |
| 1678 | if (arg[1].arg_type == A_DOUBLE) { | |
| 1679 | if (makesingle) | |
| 1680 | arg[1].arg_type = A_SINGLE; /* now we can optimize on it */ | |
| 1681 | else | |
| 1682 | leave = "\\"; | |
| 1683 | for (d = s = tmpstr->str_ptr; *s; *d++ = *s++) { | |
| 1684 | if (*s == '\\' && (!leave || index(leave,s[1]))) | |
| 1685 | s++; | |
| 1686 | } | |
| 1687 | *d = '\0'; | |
| 1688 | } | |
| 1689 | tmpstr->str_cur = d - tmpstr->str_ptr; /* XXX cheat */ | |
| 1690 | arg[1].arg_ptr.arg_str = tmpstr; | |
| 1691 | s = tmps; | |
| 1692 | break; | |
| 1693 | } | |
| 1694 | } | |
| 1695 | return s; | |
| 1696 | } | |
| 1697 | ||
| 1698 | ARG * | |
| 1699 | make_op(type,newlen,arg1,arg2,arg3,dolist) | |
| 1700 | int type; | |
| 1701 | int newlen; | |
| 1702 | ARG *arg1; | |
| 1703 | ARG *arg2; | |
| 1704 | ARG *arg3; | |
| 1705 | int dolist; | |
| 1706 | { | |
| 1707 | register ARG *arg; | |
| 1708 | register ARG *chld; | |
| 1709 | register int doarg; | |
| 1710 | ||
| 1711 | arg = op_new(newlen); | |
| 1712 | arg->arg_type = type; | |
| 1713 | doarg = opargs[type]; | |
| 1714 | if (chld = arg1) { | |
| 1715 | if (!(doarg & 1)) | |
| 1716 | arg[1].arg_flags |= AF_SPECIAL; | |
| 1717 | if (doarg & 16) | |
| 1718 | arg[1].arg_flags |= AF_NUMERIC; | |
| 1719 | if (chld->arg_type == O_ITEM && | |
| 1720 | (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL) ) { | |
| 1721 | arg[1].arg_type = chld[1].arg_type; | |
| 1722 | arg[1].arg_ptr = chld[1].arg_ptr; | |
| 1723 | arg[1].arg_flags |= chld[1].arg_flags; | |
| 1724 | free_arg(chld); | |
| 1725 | } | |
| 1726 | else { | |
| 1727 | arg[1].arg_type = A_EXPR; | |
| 1728 | arg[1].arg_ptr.arg_arg = chld; | |
| 1729 | if (dolist & 1) { | |
| 1730 | if (chld->arg_type == O_LIST) { | |
| 1731 | if (newlen == 1) { /* we can hoist entire list */ | |
| 1732 | chld->arg_type = type; | |
| 1733 | free_arg(arg); | |
| 1734 | arg = chld; | |
| 1735 | } | |
| 1736 | else { | |
| 1737 | arg[1].arg_flags |= AF_SPECIAL; | |
| 1738 | } | |
| 1739 | } | |
| 1740 | else if (chld->arg_type == O_ARRAY && chld->arg_len == 1) | |
| 1741 | arg[1].arg_flags |= AF_SPECIAL; | |
| 1742 | } | |
| 1743 | } | |
| 1744 | } | |
| 1745 | if (chld = arg2) { | |
| 1746 | if (!(doarg & 2)) | |
| 1747 | arg[2].arg_flags |= AF_SPECIAL; | |
| 1748 | if (doarg & 32) | |
| 1749 | arg[2].arg_flags |= AF_NUMERIC; | |
| 1750 | if (chld->arg_type == O_ITEM && | |
| 1751 | (hoistable[chld[1].arg_type] || | |
| 1752 | (type == O_ASSIGN && | |
| 1753 | (chld[1].arg_type == A_READ || | |
| 1754 | chld[1].arg_type == A_DOUBLE || | |
| 1755 | chld[1].arg_type == A_BACKTICK ) ) ) ) { | |
| 1756 | arg[2].arg_type = chld[1].arg_type; | |
| 1757 | arg[2].arg_ptr = chld[1].arg_ptr; | |
| 1758 | free_arg(chld); | |
| 1759 | } | |
| 1760 | else { | |
| 1761 | arg[2].arg_type = A_EXPR; | |
| 1762 | arg[2].arg_ptr.arg_arg = chld; | |
| 1763 | if ((dolist & 2) && | |
| 1764 | (chld->arg_type == O_LIST || | |
| 1765 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) | |
| 1766 | arg[2].arg_flags |= AF_SPECIAL; | |
| 1767 | } | |
| 1768 | } | |
| 1769 | if (chld = arg3) { | |
| 1770 | if (!(doarg & 4)) | |
| 1771 | arg[3].arg_flags |= AF_SPECIAL; | |
| 1772 | if (doarg & 64) | |
| 1773 | arg[3].arg_flags |= AF_NUMERIC; | |
| 1774 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) { | |
| 1775 | arg[3].arg_type = chld[1].arg_type; | |
| 1776 | arg[3].arg_ptr = chld[1].arg_ptr; | |
| 1777 | free_arg(chld); | |
| 1778 | } | |
| 1779 | else { | |
| 1780 | arg[3].arg_type = A_EXPR; | |
| 1781 | arg[3].arg_ptr.arg_arg = chld; | |
| 1782 | if ((dolist & 4) && | |
| 1783 | (chld->arg_type == O_LIST || | |
| 1784 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) | |
| 1785 | arg[3].arg_flags |= AF_SPECIAL; | |
| 1786 | } | |
| 1787 | } | |
| 1788 | #ifdef DEBUGGING | |
| 1789 | if (debug & 16) { | |
| 1790 | fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]); | |
| 1791 | if (arg1) | |
| 1792 | fprintf(stderr,",%s=%lx", | |
| 1793 | argname[arg[1].arg_type],arg[1].arg_ptr.arg_arg); | |
| 1794 | if (arg2) | |
| 1795 | fprintf(stderr,",%s=%lx", | |
| 1796 | argname[arg[2].arg_type],arg[2].arg_ptr.arg_arg); | |
| 1797 | if (arg3) | |
| 1798 | fprintf(stderr,",%s=%lx", | |
| 1799 | argname[arg[3].arg_type],arg[3].arg_ptr.arg_arg); | |
| 1800 | fprintf(stderr,")\n"); | |
| 1801 | } | |
| 1802 | #endif | |
| 1803 | evalstatic(arg); /* see if we can consolidate anything */ | |
| 1804 | return arg; | |
| 1805 | } | |
| 1806 | ||
| 1807 | /* turn 123 into 123 == $. */ | |
| 1808 | ||
| 1809 | ARG * | |
| 1810 | flipflip(arg) | |
| 1811 | register ARG *arg; | |
| 1812 | { | |
| 1813 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_SINGLE) { | |
| 1814 | arg = (ARG*)saferealloc((char*)arg,3*sizeof(ARG)); | |
| 1815 | arg->arg_type = O_EQ; | |
| 1816 | arg->arg_len = 2; | |
| 1817 | arg[2].arg_type = A_STAB; | |
| 1818 | arg[2].arg_flags = 0; | |
| 1819 | arg[2].arg_ptr.arg_stab = stabent(".",TRUE); | |
| 1820 | } | |
| 1821 | return arg; | |
| 1822 | } | |
| 1823 | ||
| 1824 | void | |
| 1825 | evalstatic(arg) | |
| 1826 | register ARG *arg; | |
| 1827 | { | |
| 1828 | register STR *str; | |
| 1829 | register STR *s1; | |
| 1830 | register STR *s2; | |
| 1831 | double value; /* must not be register */ | |
| 1832 | register char *tmps; | |
| 1833 | int i; | |
| 1834 | double exp(), log(), sqrt(), modf(); | |
| 1835 | char *crypt(); | |
| 1836 | ||
| 1837 | if (!arg || !arg->arg_len) | |
| 1838 | return; | |
| 1839 | ||
| 1840 | if (arg[1].arg_type == A_SINGLE && | |
| 1841 | (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) { | |
| 1842 | str = str_new(0); | |
| 1843 | s1 = arg[1].arg_ptr.arg_str; | |
| 1844 | if (arg->arg_len > 1) | |
| 1845 | s2 = arg[2].arg_ptr.arg_str; | |
| 1846 | else | |
| 1847 | s2 = Nullstr; | |
| 1848 | switch (arg->arg_type) { | |
| 1849 | default: | |
| 1850 | str_free(str); | |
| 1851 | str = Nullstr; /* can't be evaluated yet */ | |
| 1852 | break; | |
| 1853 | case O_CONCAT: | |
| 1854 | str_sset(str,s1); | |
| 1855 | str_scat(str,s2); | |
| 1856 | break; | |
| 1857 | case O_REPEAT: | |
| 1858 | i = (int)str_gnum(s2); | |
| 1859 | while (i--) | |
| 1860 | str_scat(str,s1); | |
| 1861 | break; | |
| 1862 | case O_MULTIPLY: | |
| 1863 | value = str_gnum(s1); | |
| 1864 | str_numset(str,value * str_gnum(s2)); | |
| 1865 | break; | |
| 1866 | case O_DIVIDE: | |
| 1867 | value = str_gnum(s1); | |
| 1868 | str_numset(str,value / str_gnum(s2)); | |
| 1869 | break; | |
| 1870 | case O_MODULO: | |
| 1871 | value = str_gnum(s1); | |
| 1872 | str_numset(str,(double)(((long)value) % ((long)str_gnum(s2)))); | |
| 1873 | break; | |
| 1874 | case O_ADD: | |
| 1875 | value = str_gnum(s1); | |
| 1876 | str_numset(str,value + str_gnum(s2)); | |
| 1877 | break; | |
| 1878 | case O_SUBTRACT: | |
| 1879 | value = str_gnum(s1); | |
| 1880 | str_numset(str,value - str_gnum(s2)); | |
| 1881 | break; | |
| 1882 | case O_LEFT_SHIFT: | |
| 1883 | value = str_gnum(s1); | |
| 1884 | str_numset(str,(double)(((long)value) << ((long)str_gnum(s2)))); | |
| 1885 | break; | |
| 1886 | case O_RIGHT_SHIFT: | |
| 1887 | value = str_gnum(s1); | |
| 1888 | str_numset(str,(double)(((long)value) >> ((long)str_gnum(s2)))); | |
| 1889 | break; | |
| 1890 | case O_LT: | |
| 1891 | value = str_gnum(s1); | |
| 1892 | str_numset(str,(double)(value < str_gnum(s2))); | |
| 1893 | break; | |
| 1894 | case O_GT: | |
| 1895 | value = str_gnum(s1); | |
| 1896 | str_numset(str,(double)(value > str_gnum(s2))); | |
| 1897 | break; | |
| 1898 | case O_LE: | |
| 1899 | value = str_gnum(s1); | |
| 1900 | str_numset(str,(double)(value <= str_gnum(s2))); | |
| 1901 | break; | |
| 1902 | case O_GE: | |
| 1903 | value = str_gnum(s1); | |
| 1904 | str_numset(str,(double)(value >= str_gnum(s2))); | |
| 1905 | break; | |
| 1906 | case O_EQ: | |
| 1907 | value = str_gnum(s1); | |
| 1908 | str_numset(str,(double)(value == str_gnum(s2))); | |
| 1909 | break; | |
| 1910 | case O_NE: | |
| 1911 | value = str_gnum(s1); | |
| 1912 | str_numset(str,(double)(value != str_gnum(s2))); | |
| 1913 | break; | |
| 1914 | case O_BIT_AND: | |
| 1915 | value = str_gnum(s1); | |
| 1916 | str_numset(str,(double)(((long)value) & ((long)str_gnum(s2)))); | |
| 1917 | break; | |
| 1918 | case O_XOR: | |
| 1919 | value = str_gnum(s1); | |
| 1920 | str_numset(str,(double)(((long)value) ^ ((long)str_gnum(s2)))); | |
| 1921 | break; | |
| 1922 | case O_BIT_OR: | |
| 1923 | value = str_gnum(s1); | |
| 1924 | str_numset(str,(double)(((long)value) | ((long)str_gnum(s2)))); | |
| 1925 | break; | |
| 1926 | case O_AND: | |
| 1927 | if (str_true(s1)) | |
| 1928 | str = str_make(str_get(s2)); | |
| 1929 | else | |
| 1930 | str = str_make(str_get(s1)); | |
| 1931 | break; | |
| 1932 | case O_OR: | |
| 1933 | if (str_true(s1)) | |
| 1934 | str = str_make(str_get(s1)); | |
| 1935 | else | |
| 1936 | str = str_make(str_get(s2)); | |
| 1937 | break; | |
| 1938 | case O_COND_EXPR: | |
| 1939 | if (arg[3].arg_type != A_SINGLE) { | |
| 1940 | str_free(str); | |
| 1941 | str = Nullstr; | |
| 1942 | } | |
| 1943 | else { | |
| 1944 | str = str_make(str_get(str_true(s1) ? s2 : arg[3].arg_ptr.arg_str)); | |
| 1945 | str_free(arg[3].arg_ptr.arg_str); | |
| 1946 | } | |
| 1947 | break; | |
| 1948 | case O_NEGATE: | |
| 1949 | str_numset(str,(double)(-str_gnum(s1))); | |
| 1950 | break; | |
| 1951 | case O_NOT: | |
| 1952 | str_numset(str,(double)(!str_true(s1))); | |
| 1953 | break; | |
| 1954 | case O_COMPLEMENT: | |
| 1955 | str_numset(str,(double)(~(long)str_gnum(s1))); | |
| 1956 | break; | |
| 1957 | case O_LENGTH: | |
| 1958 | str_numset(str, (double)str_len(s1)); | |
| 1959 | break; | |
| 1960 | case O_SUBSTR: | |
| 1961 | if (arg[3].arg_type != A_SINGLE || stabent("[",FALSE)) { | |
| 1962 | str_free(str); /* making the fallacious assumption */ | |
| 1963 | str = Nullstr; /* that any $[ occurs before substr()*/ | |
| 1964 | } | |
| 1965 | else { | |
| 1966 | char *beg; | |
| 1967 | int len = (int)str_gnum(s2); | |
| 1968 | int tmp; | |
| 1969 | ||
| 1970 | for (beg = str_get(s1); *beg && len > 0; beg++,len--) ; | |
| 1971 | len = (int)str_gnum(arg[3].arg_ptr.arg_str); | |
| 1972 | str_free(arg[3].arg_ptr.arg_str); | |
| 1973 | if (len > (tmp = strlen(beg))) | |
| 1974 | len = tmp; | |
| 1975 | str_nset(str,beg,len); | |
| 1976 | } | |
| 1977 | break; | |
| 1978 | case O_SLT: | |
| 1979 | tmps = str_get(s1); | |
| 1980 | str_numset(str,(double)(strLT(tmps,str_get(s2)))); | |
| 1981 | break; | |
| 1982 | case O_SGT: | |
| 1983 | tmps = str_get(s1); | |
| 1984 | str_numset(str,(double)(strGT(tmps,str_get(s2)))); | |
| 1985 | break; | |
| 1986 | case O_SLE: | |
| 1987 | tmps = str_get(s1); | |
| 1988 | str_numset(str,(double)(strLE(tmps,str_get(s2)))); | |
| 1989 | break; | |
| 1990 | case O_SGE: | |
| 1991 | tmps = str_get(s1); | |
| 1992 | str_numset(str,(double)(strGE(tmps,str_get(s2)))); | |
| 1993 | break; | |
| 1994 | case O_SEQ: | |
| 1995 | tmps = str_get(s1); | |
| 1996 | str_numset(str,(double)(strEQ(tmps,str_get(s2)))); | |
| 1997 | break; | |
| 1998 | case O_SNE: | |
| 1999 | tmps = str_get(s1); | |
| 2000 | str_numset(str,(double)(strNE(tmps,str_get(s2)))); | |
| 2001 | break; | |
| 2002 | case O_CRYPT: | |
| 2003 | tmps = str_get(s1); | |
| 2004 | str_set(str,crypt(tmps,str_get(s2))); | |
| 2005 | break; | |
| 2006 | case O_EXP: | |
| 2007 | str_numset(str,exp(str_gnum(s1))); | |
| 2008 | break; | |
| 2009 | case O_LOG: | |
| 2010 | str_numset(str,log(str_gnum(s1))); | |
| 2011 | break; | |
| 2012 | case O_SQRT: | |
| 2013 | str_numset(str,sqrt(str_gnum(s1))); | |
| 2014 | break; | |
| 2015 | case O_INT: | |
| 2016 | modf(str_gnum(s1),&value); | |
| 2017 | str_numset(str,value); | |
| 2018 | break; | |
| 2019 | case O_ORD: | |
| 2020 | str_numset(str,(double)(*str_get(s1))); | |
| 2021 | break; | |
| 2022 | } | |
| 2023 | if (str) { | |
| 2024 | arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */ | |
| 2025 | str_free(s1); | |
| 2026 | str_free(s2); | |
| 2027 | arg[1].arg_ptr.arg_str = str; | |
| 2028 | } | |
| 2029 | } | |
| 2030 | } | |
| 2031 | ||
| 2032 | ARG * | |
| 2033 | l(arg) | |
| 2034 | register ARG *arg; | |
| 2035 | { | |
| 2036 | register int i; | |
| 2037 | register ARG *arg1; | |
| 2038 | ||
| 2039 | arg->arg_flags |= AF_COMMON; /* XXX should cross-match */ | |
| 2040 | ||
| 2041 | /* see if it's an array reference */ | |
| 2042 | ||
| 2043 | if (arg[1].arg_type == A_EXPR) { | |
| 2044 | arg1 = arg[1].arg_ptr.arg_arg; | |
| 2045 | ||
| 2046 | if (arg1->arg_type == O_LIST && arg->arg_type != O_ITEM) { | |
| 2047 | /* assign to list */ | |
| 2048 | arg[1].arg_flags |= AF_SPECIAL; | |
| 2049 | arg[2].arg_flags |= AF_SPECIAL; | |
| 2050 | for (i = arg1->arg_len; i >= 1; i--) { | |
| 2051 | switch (arg1[i].arg_type) { | |
| 2052 | case A_STAB: case A_LVAL: | |
| 2053 | arg1[i].arg_type = A_LVAL; | |
| 2054 | break; | |
| 2055 | case A_EXPR: case A_LEXPR: | |
| 2056 | arg1[i].arg_type = A_LEXPR; | |
| 2057 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_ARRAY) | |
| 2058 | arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY; | |
| 2059 | else if (arg1[i].arg_ptr.arg_arg->arg_type == O_HASH) | |
| 2060 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH; | |
| 2061 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LARRAY) | |
| 2062 | break; | |
| 2063 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LHASH) | |
| 2064 | break; | |
| 2065 | /* FALL THROUGH */ | |
| 2066 | default: | |
| 2067 | sprintf(tokenbuf, | |
| 2068 | "Illegal item (%s) as lvalue",argname[arg1[i].arg_type]); | |
| 2069 | yyerror(tokenbuf); | |
| 2070 | } | |
| 2071 | } | |
| 2072 | } | |
| 2073 | else if (arg1->arg_type == O_ARRAY) { | |
| 2074 | if (arg1->arg_len == 1 && arg->arg_type != O_ITEM) { | |
| 2075 | /* assign to array */ | |
| 2076 | arg[1].arg_flags |= AF_SPECIAL; | |
| 2077 | arg[2].arg_flags |= AF_SPECIAL; | |
| 2078 | } | |
| 2079 | else | |
| 2080 | arg1->arg_type = O_LARRAY; /* assign to array elem */ | |
| 2081 | } | |
| 2082 | else if (arg1->arg_type == O_HASH) | |
| 2083 | arg1->arg_type = O_LHASH; | |
| 2084 | else { | |
| 2085 | sprintf(tokenbuf, | |
| 2086 | "Illegal expression (%s) as lvalue",opname[arg1->arg_type]); | |
| 2087 | yyerror(tokenbuf); | |
| 2088 | } | |
| 2089 | arg[1].arg_type = A_LEXPR; | |
| 2090 | #ifdef DEBUGGING | |
| 2091 | if (debug & 16) | |
| 2092 | fprintf(stderr,"lval LEXPR\n"); | |
| 2093 | #endif | |
| 2094 | return arg; | |
| 2095 | } | |
| 2096 | ||
| 2097 | /* not an array reference, should be a register name */ | |
| 2098 | ||
| 2099 | if (arg[1].arg_type != A_STAB && arg[1].arg_type != A_LVAL) { | |
| 2100 | sprintf(tokenbuf, | |
| 2101 | "Illegal item (%s) as lvalue",argname[arg[1].arg_type]); | |
| 2102 | yyerror(tokenbuf); | |
| 2103 | } | |
| 2104 | arg[1].arg_type = A_LVAL; | |
| 2105 | #ifdef DEBUGGING | |
| 2106 | if (debug & 16) | |
| 2107 | fprintf(stderr,"lval LVAL\n"); | |
| 2108 | #endif | |
| 2109 | return arg; | |
| 2110 | } | |
| 2111 | ||
| 2112 | ARG * | |
| 2113 | addflags(i,flags,arg) | |
| 2114 | register ARG *arg; | |
| 2115 | { | |
| 2116 | arg[i].arg_flags |= flags; | |
| 2117 | return arg; | |
| 2118 | } | |
| 2119 | ||
| 2120 | ARG * | |
| 2121 | hide_ary(arg) | |
| 2122 | ARG *arg; | |
| 2123 | { | |
| 2124 | if (arg->arg_type == O_ARRAY) | |
| 2125 | return make_op(O_ITEM,1,arg,Nullarg,Nullarg,0); | |
| 2126 | return arg; | |
| 2127 | } | |
| 2128 | ||
| 2129 | ARG * | |
| 2130 | make_list(arg) | |
| 2131 | register ARG *arg; | |
| 2132 | { | |
| 2133 | register int i; | |
| 2134 | register ARG *node; | |
| 2135 | register ARG *nxtnode; | |
| 2136 | register int j; | |
| 2137 | STR *tmpstr; | |
| 2138 | ||
| 2139 | if (!arg) { | |
| 2140 | arg = op_new(0); | |
| 2141 | arg->arg_type = O_LIST; | |
| 2142 | } | |
| 2143 | if (arg->arg_type != O_COMMA) { | |
| 2144 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ | |
| 2145 | return arg; | |
| 2146 | } | |
| 2147 | for (i = 2, node = arg; ; i++) { | |
| 2148 | if (node->arg_len < 2) | |
| 2149 | break; | |
| 2150 | if (node[2].arg_type != A_EXPR) | |
| 2151 | break; | |
| 2152 | node = node[2].arg_ptr.arg_arg; | |
| 2153 | if (node->arg_type != O_COMMA) | |
| 2154 | break; | |
| 2155 | } | |
| 2156 | if (i > 2) { | |
| 2157 | node = arg; | |
| 2158 | arg = op_new(i); | |
| 2159 | tmpstr = arg->arg_ptr.arg_str; | |
| 2160 | *arg = *node; /* copy everything except the STR */ | |
| 2161 | arg->arg_ptr.arg_str = tmpstr; | |
| 2162 | for (j = 1; ; ) { | |
| 2163 | arg[j++] = node[1]; | |
| 2164 | if (j >= i) { | |
| 2165 | arg[j] = node[2]; | |
| 2166 | free_arg(node); | |
| 2167 | break; | |
| 2168 | } | |
| 2169 | nxtnode = node[2].arg_ptr.arg_arg; | |
| 2170 | free_arg(node); | |
| 2171 | node = nxtnode; | |
| 2172 | } | |
| 2173 | } | |
| 2174 | arg->arg_type = O_LIST; | |
| 2175 | arg->arg_len = i; | |
| 2176 | return arg; | |
| 2177 | } | |
| 2178 | ||
| 2179 | /* turn a single item into a list */ | |
| 2180 | ||
| 2181 | ARG * | |
| 2182 | listish(arg) | |
| 2183 | ARG *arg; | |
| 2184 | { | |
| 2185 | if (arg->arg_flags & AF_LISTISH) | |
| 2186 | arg = make_op(O_LIST,1,arg,Nullarg,Nullarg,0); | |
| 2187 | return arg; | |
| 2188 | } | |
| 2189 | ||
| 2190 | ARG * | |
| 2191 | stab_to_arg(atype,stab) | |
| 2192 | int atype; | |
| 2193 | register STAB *stab; | |
| 2194 | { | |
| 2195 | register ARG *arg; | |
| 2196 | ||
| 2197 | arg = op_new(1); | |
| 2198 | arg->arg_type = O_ITEM; | |
| 2199 | arg[1].arg_type = atype; | |
| 2200 | arg[1].arg_ptr.arg_stab = stab; | |
| 2201 | return arg; | |
| 2202 | } | |
| 2203 | ||
| 2204 | ARG * | |
| 2205 | cval_to_arg(cval) | |
| 2206 | register char *cval; | |
| 2207 | { | |
| 2208 | register ARG *arg; | |
| 2209 | ||
| 2210 | arg = op_new(1); | |
| 2211 | arg->arg_type = O_ITEM; | |
| 2212 | arg[1].arg_type = A_SINGLE; | |
| 2213 | arg[1].arg_ptr.arg_str = str_make(cval); | |
| 2214 | safefree(cval); | |
| 2215 | return arg; | |
| 2216 | } | |
| 2217 | ||
| 2218 | ARG * | |
| 2219 | op_new(numargs) | |
| 2220 | int numargs; | |
| 2221 | { | |
| 2222 | register ARG *arg; | |
| 2223 | ||
| 2224 | arg = (ARG*)safemalloc((numargs + 1) * sizeof (ARG)); | |
| 2225 | bzero((char *)arg, (numargs + 1) * sizeof (ARG)); | |
| 2226 | arg->arg_ptr.arg_str = str_new(0); | |
| 2227 | arg->arg_len = numargs; | |
| 2228 | return arg; | |
| 2229 | } | |
| 2230 | ||
| 2231 | void | |
| 2232 | free_arg(arg) | |
| 2233 | ARG *arg; | |
| 2234 | { | |
| 2235 | str_free(arg->arg_ptr.arg_str); | |
| 2236 | safefree((char*)arg); | |
| 2237 | } | |
| 2238 | ||
| 2239 | ARG * | |
| 2240 | make_match(type,expr,spat) | |
| 2241 | int type; | |
| 2242 | ARG *expr; | |
| 2243 | SPAT *spat; | |
| 2244 | { | |
| 2245 | register ARG *arg; | |
| 2246 | ||
| 2247 | arg = make_op(type,2,expr,Nullarg,Nullarg,0); | |
| 2248 | ||
| 2249 | arg[2].arg_type = A_SPAT; | |
| 2250 | arg[2].arg_ptr.arg_spat = spat; | |
| 2251 | #ifdef DEBUGGING | |
| 2252 | if (debug & 16) | |
| 2253 | fprintf(stderr,"make_match SPAT=%lx\n",spat); | |
| 2254 | #endif | |
| 2255 | ||
| 2256 | if (type == O_SUBST || type == O_NSUBST) { | |
| 2257 | if (arg[1].arg_type != A_STAB) | |
| 2258 | yyerror("Illegal lvalue"); | |
| 2259 | arg[1].arg_type = A_LVAL; | |
| 2260 | } | |
| 2261 | return arg; | |
| 2262 | } | |
| 2263 | ||
| 2264 | ARG * | |
| 2265 | cmd_to_arg(cmd) | |
| 2266 | CMD *cmd; | |
| 2267 | { | |
| 2268 | register ARG *arg; | |
| 2269 | ||
| 2270 | arg = op_new(1); | |
| 2271 | arg->arg_type = O_ITEM; | |
| 2272 | arg[1].arg_type = A_CMD; | |
| 2273 | arg[1].arg_ptr.arg_cmd = cmd; | |
| 2274 | return arg; | |
| 2275 | } | |
| 2276 | ||
| 2277 | CMD * | |
| 2278 | wopt(cmd) | |
| 2279 | register CMD *cmd; | |
| 2280 | { | |
| 2281 | register CMD *tail; | |
| 2282 | register ARG *arg = cmd->c_expr; | |
| 2283 | char *tmps; /* used by True macro */ | |
| 2284 | ||
| 2285 | /* hoist "while (<channel>)" up into command block */ | |
| 2286 | ||
| 2287 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_READ) { | |
| 2288 | cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */ | |
| 2289 | cmd->c_flags |= CFT_GETS; /* and set it to do the input */ | |
| 2290 | cmd->c_stab = arg[1].arg_ptr.arg_stab; | |
| 2291 | if (arg[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV) { | |
| 2292 | cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$_ =" */ | |
| 2293 | stab_to_arg(A_LVAL,defstab), arg, Nullarg,1 )); | |
| 2294 | } | |
| 2295 | else { | |
| 2296 | free_arg(arg); | |
| 2297 | cmd->c_expr = Nullarg; | |
| 2298 | } | |
| 2299 | } | |
| 2300 | ||
| 2301 | /* First find the end of the true list */ | |
| 2302 | ||
| 2303 | if (cmd->ucmd.ccmd.cc_true == Nullcmd) | |
| 2304 | return cmd; | |
| 2305 | for (tail = cmd->ucmd.ccmd.cc_true; tail->c_next; tail = tail->c_next) ; | |
| 2306 | ||
| 2307 | /* if there's a continue block, link it to true block and find end */ | |
| 2308 | ||
| 2309 | if (cmd->ucmd.ccmd.cc_alt != Nullcmd) { | |
| 2310 | tail->c_next = cmd->ucmd.ccmd.cc_alt; | |
| 2311 | for ( ; tail->c_next; tail = tail->c_next) ; | |
| 2312 | } | |
| 2313 | ||
| 2314 | /* Here's the real trick: link the end of the list back to the beginning, | |
| 2315 | * inserting a "last" block to break out of the loop. This saves one or | |
| 2316 | * two procedure calls every time through the loop, because of how cmd_exec | |
| 2317 | * does tail recursion. | |
| 2318 | */ | |
| 2319 | ||
| 2320 | tail->c_next = (CMD *) safemalloc(sizeof (CMD)); | |
| 2321 | tail = tail->c_next; | |
| 2322 | if (!cmd->ucmd.ccmd.cc_alt) | |
| 2323 | cmd->ucmd.ccmd.cc_alt = tail; /* every loop has a continue now */ | |
| 2324 | ||
| 2325 | bcopy((char *)cmd, (char *)tail, sizeof(CMD)); | |
| 2326 | tail->c_type = C_EXPR; | |
| 2327 | tail->c_flags ^= CF_INVERT; /* turn into "last unless" */ | |
| 2328 | tail->c_next = tail->ucmd.ccmd.cc_true; /* loop directly back to top */ | |
| 2329 | tail->ucmd.acmd.ac_expr = make_op(O_LAST,0,Nullarg,Nullarg,Nullarg,0); | |
| 2330 | tail->ucmd.acmd.ac_stab = Nullstab; | |
| 2331 | return cmd; | |
| 2332 | } | |
| 2333 | ||
| 2334 | FCMD * | |
| 2335 | load_format() | |
| 2336 | { | |
| 2337 | FCMD froot; | |
| 2338 | FCMD *flinebeg; | |
| 2339 | register FCMD *fprev = &froot; | |
| 2340 | register FCMD *fcmd; | |
| 2341 | register char *s; | |
| 2342 | register char *t; | |
| 2343 | register char tmpchar; | |
| 2344 | bool noblank; | |
| 2345 | ||
| 2346 | while ((s = str_gets(linestr,rsfp)) != Nullch) { | |
| 2347 | line++; | |
| 2348 | if (strEQ(s,".\n")) { | |
| 2349 | bufptr = s; | |
| 2350 | return froot.f_next; | |
| 2351 | } | |
| 2352 | if (*s == '#') | |
| 2353 | continue; | |
| 2354 | flinebeg = Nullfcmd; | |
| 2355 | noblank = FALSE; | |
| 2356 | while (*s) { | |
| 2357 | fcmd = (FCMD *)safemalloc(sizeof (FCMD)); | |
| 2358 | bzero((char*)fcmd, sizeof (FCMD)); | |
| 2359 | fprev->f_next = fcmd; | |
| 2360 | fprev = fcmd; | |
| 2361 | for (t=s; *t && *t != '@' && *t != '^'; t++) { | |
| 2362 | if (*t == '~') { | |
| 2363 | noblank = TRUE; | |
| 2364 | *t = ' '; | |
| 2365 | } | |
| 2366 | } | |
| 2367 | tmpchar = *t; | |
| 2368 | *t = '\0'; | |
| 2369 | fcmd->f_pre = savestr(s); | |
| 2370 | fcmd->f_presize = strlen(s); | |
| 2371 | *t = tmpchar; | |
| 2372 | s = t; | |
| 2373 | if (!*s) { | |
| 2374 | if (noblank) | |
| 2375 | fcmd->f_flags |= FC_NOBLANK; | |
| 2376 | break; | |
| 2377 | } | |
| 2378 | if (!flinebeg) | |
| 2379 | flinebeg = fcmd; /* start values here */ | |
| 2380 | if (*s++ == '^') | |
| 2381 | fcmd->f_flags |= FC_CHOP; /* for doing text filling */ | |
| 2382 | switch (*s) { | |
| 2383 | case '*': | |
| 2384 | fcmd->f_type = F_LINES; | |
| 2385 | *s = '\0'; | |
| 2386 | break; | |
| 2387 | case '<': | |
| 2388 | fcmd->f_type = F_LEFT; | |
| 2389 | while (*s == '<') | |
| 2390 | s++; | |
| 2391 | break; | |
| 2392 | case '>': | |
| 2393 | fcmd->f_type = F_RIGHT; | |
| 2394 | while (*s == '>') | |
| 2395 | s++; | |
| 2396 | break; | |
| 2397 | case '|': | |
| 2398 | fcmd->f_type = F_CENTER; | |
| 2399 | while (*s == '|') | |
| 2400 | s++; | |
| 2401 | break; | |
| 2402 | default: | |
| 2403 | fcmd->f_type = F_LEFT; | |
| 2404 | break; | |
| 2405 | } | |
| 2406 | if (fcmd->f_flags & FC_CHOP && *s == '.') { | |
| 2407 | fcmd->f_flags |= FC_MORE; | |
| 2408 | while (*s == '.') | |
| 2409 | s++; | |
| 2410 | } | |
| 2411 | fcmd->f_size = s-t; | |
| 2412 | } | |
| 2413 | if (flinebeg) { | |
| 2414 | again: | |
| 2415 | if ((bufptr = str_gets(linestr ,rsfp)) == Nullch) | |
| 2416 | goto badform; | |
| 2417 | line++; | |
| 2418 | if (strEQ(bufptr,".\n")) { | |
| 2419 | yyerror("Missing values line"); | |
| 2420 | return froot.f_next; | |
| 2421 | } | |
| 2422 | if (*bufptr == '#') | |
| 2423 | goto again; | |
| 2424 | lex_newlines = TRUE; | |
| 2425 | while (flinebeg || *bufptr) { | |
| 2426 | switch(yylex()) { | |
| 2427 | default: | |
| 2428 | yyerror("Bad value in format"); | |
| 2429 | *bufptr = '\0'; | |
| 2430 | break; | |
| 2431 | case '\n': | |
| 2432 | if (flinebeg) | |
| 2433 | yyerror("Missing value in format"); | |
| 2434 | *bufptr = '\0'; | |
| 2435 | break; | |
| 2436 | case REG: | |
| 2437 | yylval.arg = stab_to_arg(A_LVAL,yylval.stabval); | |
| 2438 | /* FALL THROUGH */ | |
| 2439 | case RSTRING: | |
| 2440 | if (!flinebeg) | |
| 2441 | yyerror("Extra value in format"); | |
| 2442 | else { | |
| 2443 | flinebeg->f_expr = yylval.arg; | |
| 2444 | do { | |
| 2445 | flinebeg = flinebeg->f_next; | |
| 2446 | } while (flinebeg && flinebeg->f_size == 0); | |
| 2447 | } | |
| 2448 | break; | |
| 2449 | case ',': case ';': | |
| 2450 | continue; | |
| 2451 | } | |
| 2452 | } | |
| 2453 | lex_newlines = FALSE; | |
| 2454 | } | |
| 2455 | } | |
| 2456 | badform: | |
| 2457 | bufptr = str_get(linestr); | |
| 2458 | yyerror("Format not terminated"); | |
| 2459 | return froot.f_next; | |
| 2460 | } |