| Commit | Line | Data |
|---|
| 135863df |
1 | char rcsid[] = "$Header: perly.c,v 1.0.1.2 88/01/24 00:06:03 root Exp $"; |
| 8d063cd8 |
2 | /* |
| 3 | * $Log: perly.c,v $ |
| 135863df |
4 | * Revision 1.0.1.2 88/01/24 00:06:03 root |
| 5 | * patch 2: s/(abc)/\1/ grandfathering didn't work right. |
| 6 | * |
| 36ce8bec |
7 | * Revision 1.0.1.1 88/01/21 21:25:57 root |
| 8 | * Now uses CPP and CPPMINUS symbols from config.h. |
| 9 | * |
| 8d063cd8 |
10 | * Revision 1.0 87/12/18 15:53:31 root |
| 11 | * Initial revision |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | bool preprocess = FALSE; |
| 16 | bool assume_n = FALSE; |
| 17 | bool assume_p = FALSE; |
| 18 | bool doswitches = FALSE; |
| 19 | char *filename; |
| 20 | char *e_tmpname = "/tmp/perl-eXXXXXX"; |
| 21 | FILE *e_fp = Nullfp; |
| 22 | ARG *l(); |
| 23 | |
| 24 | main(argc,argv,env) |
| 25 | register int argc; |
| 26 | register char **argv; |
| 27 | register char **env; |
| 28 | { |
| 29 | register STR *str; |
| 30 | register char *s; |
| 31 | char *index(); |
| 32 | |
| 33 | linestr = str_new(80); |
| 34 | str = str_make("-I/usr/lib/perl "); /* first used for -I flags */ |
| 35 | for (argc--,argv++; argc; argc--,argv++) { |
| 36 | if (argv[0][0] != '-' || !argv[0][1]) |
| 37 | break; |
| 38 | reswitch: |
| 39 | switch (argv[0][1]) { |
| 40 | #ifdef DEBUGGING |
| 41 | case 'D': |
| 42 | debug = atoi(argv[0]+2); |
| 43 | #ifdef YYDEBUG |
| 44 | yydebug = (debug & 1); |
| 45 | #endif |
| 46 | break; |
| 47 | #endif |
| 48 | case 'e': |
| 49 | if (!e_fp) { |
| 50 | mktemp(e_tmpname); |
| 51 | e_fp = fopen(e_tmpname,"w"); |
| 52 | } |
| 53 | if (argv[1]) |
| 54 | fputs(argv[1],e_fp); |
| 55 | putc('\n', e_fp); |
| 56 | argc--,argv++; |
| 57 | break; |
| 58 | case 'i': |
| 59 | inplace = savestr(argv[0]+2); |
| 60 | argvoutstab = stabent("ARGVOUT",TRUE); |
| 61 | break; |
| 62 | case 'I': |
| 63 | str_cat(str,argv[0]); |
| 64 | str_cat(str," "); |
| 65 | if (!argv[0][2]) { |
| 66 | str_cat(str,argv[1]); |
| 67 | argc--,argv++; |
| 68 | str_cat(str," "); |
| 69 | } |
| 70 | break; |
| 71 | case 'n': |
| 72 | assume_n = TRUE; |
| 73 | strcpy(argv[0], argv[0]+1); |
| 74 | goto reswitch; |
| 75 | case 'p': |
| 76 | assume_p = TRUE; |
| 77 | strcpy(argv[0], argv[0]+1); |
| 78 | goto reswitch; |
| 79 | case 'P': |
| 80 | preprocess = TRUE; |
| 81 | strcpy(argv[0], argv[0]+1); |
| 82 | goto reswitch; |
| 83 | case 's': |
| 84 | doswitches = TRUE; |
| 85 | strcpy(argv[0], argv[0]+1); |
| 86 | goto reswitch; |
| 87 | case 'v': |
| 88 | version(); |
| 89 | exit(0); |
| 90 | case '-': |
| 91 | argc--,argv++; |
| 92 | goto switch_end; |
| 93 | case 0: |
| 94 | break; |
| 95 | default: |
| 96 | fatal("Unrecognized switch: %s\n",argv[0]); |
| 97 | } |
| 98 | } |
| 99 | switch_end: |
| 100 | if (e_fp) { |
| 101 | fclose(e_fp); |
| 102 | argc++,argv--; |
| 103 | argv[0] = e_tmpname; |
| 104 | } |
| 105 | |
| 106 | str_set(&str_no,No); |
| 107 | str_set(&str_yes,Yes); |
| 108 | init_eval(); |
| 109 | |
| 110 | /* open script */ |
| 111 | |
| 112 | if (argv[0] == Nullch) |
| 113 | argv[0] = "-"; |
| 114 | filename = savestr(argv[0]); |
| 115 | if (strEQ(filename,"-")) |
| 116 | argv[0] = ""; |
| 117 | if (preprocess) { |
| 118 | sprintf(buf, "\ |
| 119 | /bin/sed -e '/^[^#]/b' \ |
| 120 | -e '/^#[ ]*include[ ]/b' \ |
| 121 | -e '/^#[ ]*define[ ]/b' \ |
| 122 | -e '/^#[ ]*if[ ]/b' \ |
| 123 | -e '/^#[ ]*ifdef[ ]/b' \ |
| 124 | -e '/^#[ ]*else/b' \ |
| 125 | -e '/^#[ ]*endif/b' \ |
| 126 | -e 's/^#.*//' \ |
| 36ce8bec |
127 | %s | %s -C %s%s", |
| 128 | argv[0], CPP, str_get(str), CPPMINUS); |
| 8d063cd8 |
129 | rsfp = popen(buf,"r"); |
| 130 | } |
| 131 | else if (!*argv[0]) |
| 132 | rsfp = stdin; |
| 133 | else |
| 134 | rsfp = fopen(argv[0],"r"); |
| 135 | if (rsfp == Nullfp) |
| 136 | fatal("Perl script \"%s\" doesn't seem to exist.\n",filename); |
| 137 | str_free(str); /* free -I directories */ |
| 138 | |
| 139 | defstab = stabent("_",TRUE); |
| 140 | |
| 141 | /* init tokener */ |
| 142 | |
| 143 | bufptr = str_get(linestr); |
| 144 | |
| 145 | /* now parse the report spec */ |
| 146 | |
| 147 | if (yyparse()) |
| 148 | fatal("Execution aborted due to compilation errors.\n"); |
| 149 | |
| 150 | if (e_fp) { |
| 151 | e_fp = Nullfp; |
| 152 | UNLINK(e_tmpname); |
| 153 | } |
| 154 | argc--,argv++; /* skip name of script */ |
| 155 | if (doswitches) { |
| 156 | for (; argc > 0 && **argv == '-'; argc--,argv++) { |
| 157 | if (argv[0][1] == '-') { |
| 158 | argc--,argv++; |
| 159 | break; |
| 160 | } |
| 161 | str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0); |
| 162 | } |
| 163 | } |
| 164 | if (argvstab = stabent("ARGV",FALSE)) { |
| 165 | for (; argc > 0; argc--,argv++) { |
| 166 | apush(argvstab->stab_array,str_make(argv[0])); |
| 167 | } |
| 168 | } |
| 169 | if (envstab = stabent("ENV",FALSE)) { |
| 170 | for (; *env; env++) { |
| 171 | if (!(s = index(*env,'='))) |
| 172 | continue; |
| 173 | *s++ = '\0'; |
| 174 | str = str_make(s); |
| 175 | str->str_link.str_magic = envstab; |
| 176 | hstore(envstab->stab_hash,*env,str); |
| 177 | *--s = '='; |
| 178 | } |
| 179 | } |
| 180 | sigstab = stabent("SIG",FALSE); |
| 181 | |
| 182 | magicalize("!#?^~=-%0123456789.+&*(),\\/[|"); |
| 183 | |
| 184 | (tmpstab = stabent("0",FALSE)) && str_set(STAB_STR(tmpstab),filename); |
| 185 | (tmpstab = stabent("$",FALSE)) && |
| 186 | str_numset(STAB_STR(tmpstab),(double)getpid()); |
| 187 | |
| 188 | tmpstab = stabent("stdin",TRUE); |
| 189 | tmpstab->stab_io = stio_new(); |
| 190 | tmpstab->stab_io->fp = stdin; |
| 191 | |
| 192 | tmpstab = stabent("stdout",TRUE); |
| 193 | tmpstab->stab_io = stio_new(); |
| 194 | tmpstab->stab_io->fp = stdout; |
| 195 | defoutstab = tmpstab; |
| 196 | curoutstab = tmpstab; |
| 197 | |
| 198 | tmpstab = stabent("stderr",TRUE); |
| 199 | tmpstab->stab_io = stio_new(); |
| 200 | tmpstab->stab_io->fp = stderr; |
| 201 | |
| 202 | setjmp(top_env); /* sets goto_targ on longjump */ |
| 203 | |
| 204 | #ifdef DEBUGGING |
| 205 | if (debug & 1024) |
| 206 | dump_cmd(main_root,Nullcmd); |
| 207 | if (debug) |
| 208 | fprintf(stderr,"\nEXECUTING...\n\n"); |
| 209 | #endif |
| 210 | |
| 211 | /* do it */ |
| 212 | |
| 213 | (void) cmd_exec(main_root); |
| 214 | |
| 215 | if (goto_targ) |
| 216 | fatal("Can't find label \"%s\"--aborting.\n",goto_targ); |
| 217 | exit(0); |
| 218 | } |
| 219 | |
| 220 | magicalize(list) |
| 221 | register char *list; |
| 222 | { |
| 223 | register STAB *stab; |
| 224 | char sym[2]; |
| 225 | |
| 226 | sym[1] = '\0'; |
| 227 | while (*sym = *list++) { |
| 228 | if (stab = stabent(sym,FALSE)) { |
| 229 | stab->stab_flags = SF_VMAGIC; |
| 230 | stab->stab_val->str_link.str_magic = stab; |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | #define RETURN(retval) return (bufptr = s,retval) |
| 236 | #define OPERATOR(retval) return (expectterm = TRUE,bufptr = s,retval) |
| 237 | #define TERM(retval) return (expectterm = FALSE,bufptr = s,retval) |
| 238 | #define LOOPX(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,LOOPEX) |
| 239 | #define UNI(f) return (yylval.ival = f,expectterm = TRUE,bufptr = s,UNIOP) |
| 240 | #define FUN0(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC0) |
| 241 | #define FUN1(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC1) |
| 242 | #define FUN2(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC2) |
| 243 | #define FUN3(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC3) |
| 244 | #define SFUN(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,STABFUN) |
| 245 | |
| 246 | yylex() |
| 247 | { |
| 248 | register char *s = bufptr; |
| 249 | register char *d; |
| 250 | register int tmp; |
| 251 | static bool in_format = FALSE; |
| 252 | static bool firstline = TRUE; |
| 253 | |
| 254 | retry: |
| 255 | #ifdef YYDEBUG |
| 256 | if (yydebug) |
| 257 | if (index(s,'\n')) |
| 258 | fprintf(stderr,"Tokener at %s",s); |
| 259 | else |
| 260 | fprintf(stderr,"Tokener at %s\n",s); |
| 261 | #endif |
| 262 | switch (*s) { |
| 263 | default: |
| 264 | fprintf(stderr, |
| 265 | "Unrecognized character %c in file %s line %d--ignoring.\n", |
| 266 | *s++,filename,line); |
| 267 | goto retry; |
| 268 | case 0: |
| 269 | s = str_get(linestr); |
| 270 | *s = '\0'; |
| 271 | if (firstline && (assume_n || assume_p)) { |
| 272 | firstline = FALSE; |
| 273 | str_set(linestr,"while (<>) {"); |
| 274 | s = str_get(linestr); |
| 275 | goto retry; |
| 276 | } |
| 277 | if (!rsfp) |
| 278 | RETURN(0); |
| 279 | if (in_format) { |
| 280 | yylval.formval = load_format(); /* leaves . in buffer */ |
| 281 | in_format = FALSE; |
| 282 | s = str_get(linestr); |
| 283 | TERM(FORMLIST); |
| 284 | } |
| 285 | line++; |
| 286 | if ((s = str_gets(linestr, rsfp)) == Nullch) { |
| 287 | if (preprocess) |
| 288 | pclose(rsfp); |
| 289 | else if (rsfp != stdin) |
| 290 | fclose(rsfp); |
| 291 | rsfp = Nullfp; |
| 292 | if (assume_n || assume_p) { |
| 293 | str_set(linestr,assume_p ? "}continue{print;" : ""); |
| 294 | str_cat(linestr,"}"); |
| 295 | s = str_get(linestr); |
| 296 | goto retry; |
| 297 | } |
| 298 | s = str_get(linestr); |
| 299 | RETURN(0); |
| 300 | } |
| 301 | #ifdef DEBUG |
| 302 | else if (firstline) { |
| 303 | char *showinput(); |
| 304 | s = showinput(); |
| 305 | } |
| 306 | #endif |
| 307 | firstline = FALSE; |
| 308 | goto retry; |
| 309 | case ' ': case '\t': |
| 310 | s++; |
| 311 | goto retry; |
| 312 | case '\n': |
| 313 | case '#': |
| 314 | if (preprocess && s == str_get(linestr) && |
| 315 | s[1] == ' ' && isdigit(s[2])) { |
| 316 | line = atoi(s+2)-1; |
| 317 | for (s += 2; isdigit(*s); s++) ; |
| 318 | while (*s && isspace(*s)) s++; |
| 319 | if (filename) |
| 320 | safefree(filename); |
| 321 | s[strlen(s)-1] = '\0'; /* wipe out newline */ |
| 322 | filename = savestr(s); |
| 323 | s = str_get(linestr); |
| 324 | } |
| 325 | *s = '\0'; |
| 326 | if (lex_newlines) |
| 327 | RETURN('\n'); |
| 328 | goto retry; |
| 329 | case '+': |
| 330 | case '-': |
| 331 | if (s[1] == *s) { |
| 332 | s++; |
| 333 | if (*s++ == '+') |
| 334 | RETURN(INC); |
| 335 | else |
| 336 | RETURN(DEC); |
| 337 | } |
| 338 | /* FALL THROUGH */ |
| 339 | case '*': |
| 340 | case '%': |
| 341 | case '^': |
| 342 | case '~': |
| 343 | case '(': |
| 344 | case ',': |
| 345 | case ':': |
| 346 | case ';': |
| 347 | case '{': |
| 348 | case '[': |
| 349 | tmp = *s++; |
| 350 | OPERATOR(tmp); |
| 351 | case ')': |
| 352 | case ']': |
| 353 | case '}': |
| 354 | tmp = *s++; |
| 355 | TERM(tmp); |
| 356 | case '&': |
| 357 | s++; |
| 358 | tmp = *s++; |
| 359 | if (tmp == '&') |
| 360 | OPERATOR(ANDAND); |
| 361 | s--; |
| 362 | OPERATOR('&'); |
| 363 | case '|': |
| 364 | s++; |
| 365 | tmp = *s++; |
| 366 | if (tmp == '|') |
| 367 | OPERATOR(OROR); |
| 368 | s--; |
| 369 | OPERATOR('|'); |
| 370 | case '=': |
| 371 | s++; |
| 372 | tmp = *s++; |
| 373 | if (tmp == '=') |
| 374 | OPERATOR(EQ); |
| 375 | if (tmp == '~') |
| 376 | OPERATOR(MATCH); |
| 377 | s--; |
| 378 | OPERATOR('='); |
| 379 | case '!': |
| 380 | s++; |
| 381 | tmp = *s++; |
| 382 | if (tmp == '=') |
| 383 | OPERATOR(NE); |
| 384 | if (tmp == '~') |
| 385 | OPERATOR(NMATCH); |
| 386 | s--; |
| 387 | OPERATOR('!'); |
| 388 | case '<': |
| 389 | if (expectterm) { |
| 390 | s = scanstr(s); |
| 391 | TERM(RSTRING); |
| 392 | } |
| 393 | s++; |
| 394 | tmp = *s++; |
| 395 | if (tmp == '<') |
| 396 | OPERATOR(LS); |
| 397 | if (tmp == '=') |
| 398 | OPERATOR(LE); |
| 399 | s--; |
| 400 | OPERATOR('<'); |
| 401 | case '>': |
| 402 | s++; |
| 403 | tmp = *s++; |
| 404 | if (tmp == '>') |
| 405 | OPERATOR(RS); |
| 406 | if (tmp == '=') |
| 407 | OPERATOR(GE); |
| 408 | s--; |
| 409 | OPERATOR('>'); |
| 410 | |
| 411 | #define SNARFWORD \ |
| 412 | d = tokenbuf; \ |
| 413 | while (isalpha(*s) || isdigit(*s) || *s == '_') \ |
| 414 | *d++ = *s++; \ |
| 415 | *d = '\0'; \ |
| 416 | d = tokenbuf; |
| 417 | |
| 418 | case '$': |
| 419 | if (s[1] == '#' && (isalpha(s[2]) || s[2] == '_')) { |
| 420 | s++; |
| 421 | s = scanreg(s,tokenbuf); |
| 422 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); |
| 423 | TERM(ARYLEN); |
| 424 | } |
| 425 | s = scanreg(s,tokenbuf); |
| 426 | yylval.stabval = stabent(tokenbuf,TRUE); |
| 427 | TERM(REG); |
| 428 | |
| 429 | case '@': |
| 430 | s = scanreg(s,tokenbuf); |
| 431 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); |
| 432 | TERM(ARY); |
| 433 | |
| 434 | case '/': /* may either be division or pattern */ |
| 435 | case '?': /* may either be conditional or pattern */ |
| 436 | if (expectterm) { |
| 437 | s = scanpat(s); |
| 438 | TERM(PATTERN); |
| 439 | } |
| 440 | tmp = *s++; |
| 441 | OPERATOR(tmp); |
| 442 | |
| 443 | case '.': |
| 444 | if (!expectterm || !isdigit(s[1])) { |
| 445 | s++; |
| 446 | tmp = *s++; |
| 447 | if (tmp == '.') |
| 448 | OPERATOR(DOTDOT); |
| 449 | s--; |
| 450 | OPERATOR('.'); |
| 451 | } |
| 452 | /* FALL THROUGH */ |
| 453 | case '0': case '1': case '2': case '3': case '4': |
| 454 | case '5': case '6': case '7': case '8': case '9': |
| 455 | case '\'': case '"': case '`': |
| 456 | s = scanstr(s); |
| 457 | TERM(RSTRING); |
| 458 | |
| 459 | case '_': |
| 460 | SNARFWORD; |
| 461 | yylval.cval = savestr(d); |
| 462 | OPERATOR(WORD); |
| 463 | case 'a': case 'A': |
| 464 | SNARFWORD; |
| 465 | yylval.cval = savestr(d); |
| 466 | OPERATOR(WORD); |
| 467 | case 'b': case 'B': |
| 468 | SNARFWORD; |
| 469 | yylval.cval = savestr(d); |
| 470 | OPERATOR(WORD); |
| 471 | case 'c': case 'C': |
| 472 | SNARFWORD; |
| 473 | if (strEQ(d,"continue")) |
| 474 | OPERATOR(CONTINUE); |
| 475 | if (strEQ(d,"chdir")) |
| 476 | UNI(O_CHDIR); |
| 477 | if (strEQ(d,"close")) |
| 478 | OPERATOR(CLOSE); |
| 479 | if (strEQ(d,"crypt")) |
| 480 | FUN2(O_CRYPT); |
| 481 | if (strEQ(d,"chop")) |
| 482 | OPERATOR(CHOP); |
| 483 | if (strEQ(d,"chmod")) { |
| 484 | yylval.ival = O_CHMOD; |
| 485 | OPERATOR(PRINT); |
| 486 | } |
| 487 | if (strEQ(d,"chown")) { |
| 488 | yylval.ival = O_CHOWN; |
| 489 | OPERATOR(PRINT); |
| 490 | } |
| 491 | yylval.cval = savestr(d); |
| 492 | OPERATOR(WORD); |
| 493 | case 'd': case 'D': |
| 494 | SNARFWORD; |
| 495 | if (strEQ(d,"do")) |
| 496 | OPERATOR(DO); |
| 497 | if (strEQ(d,"die")) |
| 498 | UNI(O_DIE); |
| 499 | yylval.cval = savestr(d); |
| 500 | OPERATOR(WORD); |
| 501 | case 'e': case 'E': |
| 502 | SNARFWORD; |
| 503 | if (strEQ(d,"else")) |
| 504 | OPERATOR(ELSE); |
| 505 | if (strEQ(d,"elsif")) |
| 506 | OPERATOR(ELSIF); |
| 507 | if (strEQ(d,"eq") || strEQ(d,"EQ")) |
| 508 | OPERATOR(SEQ); |
| 509 | if (strEQ(d,"exit")) |
| 510 | UNI(O_EXIT); |
| 511 | if (strEQ(d,"eof")) |
| 512 | TERM(FEOF); |
| 513 | if (strEQ(d,"exp")) |
| 514 | FUN1(O_EXP); |
| 515 | if (strEQ(d,"each")) |
| 516 | SFUN(O_EACH); |
| 517 | if (strEQ(d,"exec")) { |
| 518 | yylval.ival = O_EXEC; |
| 519 | OPERATOR(PRINT); |
| 520 | } |
| 521 | yylval.cval = savestr(d); |
| 522 | OPERATOR(WORD); |
| 523 | case 'f': case 'F': |
| 524 | SNARFWORD; |
| 525 | if (strEQ(d,"for")) |
| 526 | OPERATOR(FOR); |
| 527 | if (strEQ(d,"format")) { |
| 528 | in_format = TRUE; |
| 529 | OPERATOR(FORMAT); |
| 530 | } |
| 531 | if (strEQ(d,"fork")) |
| 532 | FUN0(O_FORK); |
| 533 | yylval.cval = savestr(d); |
| 534 | OPERATOR(WORD); |
| 535 | case 'g': case 'G': |
| 536 | SNARFWORD; |
| 537 | if (strEQ(d,"gt") || strEQ(d,"GT")) |
| 538 | OPERATOR(SGT); |
| 539 | if (strEQ(d,"ge") || strEQ(d,"GE")) |
| 540 | OPERATOR(SGE); |
| 541 | if (strEQ(d,"goto")) |
| 542 | LOOPX(O_GOTO); |
| 543 | if (strEQ(d,"gmtime")) |
| 544 | FUN1(O_GMTIME); |
| 545 | yylval.cval = savestr(d); |
| 546 | OPERATOR(WORD); |
| 547 | case 'h': case 'H': |
| 548 | SNARFWORD; |
| 549 | if (strEQ(d,"hex")) |
| 550 | FUN1(O_HEX); |
| 551 | yylval.cval = savestr(d); |
| 552 | OPERATOR(WORD); |
| 553 | case 'i': case 'I': |
| 554 | SNARFWORD; |
| 555 | if (strEQ(d,"if")) |
| 556 | OPERATOR(IF); |
| 557 | if (strEQ(d,"index")) |
| 558 | FUN2(O_INDEX); |
| 559 | if (strEQ(d,"int")) |
| 560 | FUN1(O_INT); |
| 561 | yylval.cval = savestr(d); |
| 562 | OPERATOR(WORD); |
| 563 | case 'j': case 'J': |
| 564 | SNARFWORD; |
| 565 | if (strEQ(d,"join")) |
| 566 | OPERATOR(JOIN); |
| 567 | yylval.cval = savestr(d); |
| 568 | OPERATOR(WORD); |
| 569 | case 'k': case 'K': |
| 570 | SNARFWORD; |
| 571 | if (strEQ(d,"keys")) |
| 572 | SFUN(O_KEYS); |
| 573 | if (strEQ(d,"kill")) { |
| 574 | yylval.ival = O_KILL; |
| 575 | OPERATOR(PRINT); |
| 576 | } |
| 577 | yylval.cval = savestr(d); |
| 578 | OPERATOR(WORD); |
| 579 | case 'l': case 'L': |
| 580 | SNARFWORD; |
| 581 | if (strEQ(d,"last")) |
| 582 | LOOPX(O_LAST); |
| 583 | if (strEQ(d,"length")) |
| 584 | FUN1(O_LENGTH); |
| 585 | if (strEQ(d,"lt") || strEQ(d,"LT")) |
| 586 | OPERATOR(SLT); |
| 587 | if (strEQ(d,"le") || strEQ(d,"LE")) |
| 588 | OPERATOR(SLE); |
| 589 | if (strEQ(d,"localtime")) |
| 590 | FUN1(O_LOCALTIME); |
| 591 | if (strEQ(d,"log")) |
| 592 | FUN1(O_LOG); |
| 593 | if (strEQ(d,"link")) |
| 594 | FUN2(O_LINK); |
| 595 | yylval.cval = savestr(d); |
| 596 | OPERATOR(WORD); |
| 597 | case 'm': case 'M': |
| 598 | SNARFWORD; |
| 599 | if (strEQ(d,"m")) { |
| 600 | s = scanpat(s-1); |
| 601 | TERM(PATTERN); |
| 602 | } |
| 603 | yylval.cval = savestr(d); |
| 604 | OPERATOR(WORD); |
| 605 | case 'n': case 'N': |
| 606 | SNARFWORD; |
| 607 | if (strEQ(d,"next")) |
| 608 | LOOPX(O_NEXT); |
| 609 | if (strEQ(d,"ne") || strEQ(d,"NE")) |
| 610 | OPERATOR(SNE); |
| 611 | yylval.cval = savestr(d); |
| 612 | OPERATOR(WORD); |
| 613 | case 'o': case 'O': |
| 614 | SNARFWORD; |
| 615 | if (strEQ(d,"open")) |
| 616 | OPERATOR(OPEN); |
| 617 | if (strEQ(d,"ord")) |
| 618 | FUN1(O_ORD); |
| 619 | if (strEQ(d,"oct")) |
| 620 | FUN1(O_OCT); |
| 621 | yylval.cval = savestr(d); |
| 622 | OPERATOR(WORD); |
| 623 | case 'p': case 'P': |
| 624 | SNARFWORD; |
| 625 | if (strEQ(d,"print")) { |
| 626 | yylval.ival = O_PRINT; |
| 627 | OPERATOR(PRINT); |
| 628 | } |
| 629 | if (strEQ(d,"printf")) { |
| 630 | yylval.ival = O_PRTF; |
| 631 | OPERATOR(PRINT); |
| 632 | } |
| 633 | if (strEQ(d,"push")) { |
| 634 | yylval.ival = O_PUSH; |
| 635 | OPERATOR(PUSH); |
| 636 | } |
| 637 | if (strEQ(d,"pop")) |
| 638 | OPERATOR(POP); |
| 639 | yylval.cval = savestr(d); |
| 640 | OPERATOR(WORD); |
| 641 | case 'q': case 'Q': |
| 642 | SNARFWORD; |
| 643 | yylval.cval = savestr(d); |
| 644 | OPERATOR(WORD); |
| 645 | case 'r': case 'R': |
| 646 | SNARFWORD; |
| 647 | if (strEQ(d,"reset")) |
| 648 | UNI(O_RESET); |
| 649 | if (strEQ(d,"redo")) |
| 650 | LOOPX(O_REDO); |
| 651 | if (strEQ(d,"rename")) |
| 652 | FUN2(O_RENAME); |
| 653 | yylval.cval = savestr(d); |
| 654 | OPERATOR(WORD); |
| 655 | case 's': case 'S': |
| 656 | SNARFWORD; |
| 657 | if (strEQ(d,"s")) { |
| 658 | s = scansubst(s); |
| 659 | TERM(SUBST); |
| 660 | } |
| 661 | if (strEQ(d,"shift")) |
| 662 | TERM(SHIFT); |
| 663 | if (strEQ(d,"split")) |
| 664 | TERM(SPLIT); |
| 665 | if (strEQ(d,"substr")) |
| 666 | FUN3(O_SUBSTR); |
| 667 | if (strEQ(d,"sprintf")) |
| 668 | OPERATOR(SPRINTF); |
| 669 | if (strEQ(d,"sub")) |
| 670 | OPERATOR(SUB); |
| 671 | if (strEQ(d,"select")) |
| 672 | OPERATOR(SELECT); |
| 673 | if (strEQ(d,"seek")) |
| 674 | OPERATOR(SEEK); |
| 675 | if (strEQ(d,"stat")) |
| 676 | OPERATOR(STAT); |
| 677 | if (strEQ(d,"sqrt")) |
| 678 | FUN1(O_SQRT); |
| 679 | if (strEQ(d,"sleep")) |
| 680 | UNI(O_SLEEP); |
| 681 | if (strEQ(d,"system")) { |
| 682 | yylval.ival = O_SYSTEM; |
| 683 | OPERATOR(PRINT); |
| 684 | } |
| 685 | yylval.cval = savestr(d); |
| 686 | OPERATOR(WORD); |
| 687 | case 't': case 'T': |
| 688 | SNARFWORD; |
| 689 | if (strEQ(d,"tr")) { |
| 690 | s = scantrans(s); |
| 691 | TERM(TRANS); |
| 692 | } |
| 693 | if (strEQ(d,"tell")) |
| 694 | TERM(TELL); |
| 695 | if (strEQ(d,"time")) |
| 696 | FUN0(O_TIME); |
| 697 | if (strEQ(d,"times")) |
| 698 | FUN0(O_TMS); |
| 699 | yylval.cval = savestr(d); |
| 700 | OPERATOR(WORD); |
| 701 | case 'u': case 'U': |
| 702 | SNARFWORD; |
| 703 | if (strEQ(d,"using")) |
| 704 | OPERATOR(USING); |
| 705 | if (strEQ(d,"until")) |
| 706 | OPERATOR(UNTIL); |
| 707 | if (strEQ(d,"unless")) |
| 708 | OPERATOR(UNLESS); |
| 709 | if (strEQ(d,"umask")) |
| 710 | FUN1(O_UMASK); |
| 711 | if (strEQ(d,"unshift")) { |
| 712 | yylval.ival = O_UNSHIFT; |
| 713 | OPERATOR(PUSH); |
| 714 | } |
| 715 | if (strEQ(d,"unlink")) { |
| 716 | yylval.ival = O_UNLINK; |
| 717 | OPERATOR(PRINT); |
| 718 | } |
| 719 | yylval.cval = savestr(d); |
| 720 | OPERATOR(WORD); |
| 721 | case 'v': case 'V': |
| 722 | SNARFWORD; |
| 723 | if (strEQ(d,"values")) |
| 724 | SFUN(O_VALUES); |
| 725 | yylval.cval = savestr(d); |
| 726 | OPERATOR(WORD); |
| 727 | case 'w': case 'W': |
| 728 | SNARFWORD; |
| 729 | if (strEQ(d,"write")) |
| 730 | TERM(WRITE); |
| 731 | if (strEQ(d,"while")) |
| 732 | OPERATOR(WHILE); |
| 733 | yylval.cval = savestr(d); |
| 734 | OPERATOR(WORD); |
| 735 | case 'x': case 'X': |
| 736 | SNARFWORD; |
| 737 | if (!expectterm && strEQ(d,"x")) |
| 738 | OPERATOR('x'); |
| 739 | yylval.cval = savestr(d); |
| 740 | OPERATOR(WORD); |
| 741 | case 'y': case 'Y': |
| 742 | SNARFWORD; |
| 743 | if (strEQ(d,"y")) { |
| 744 | s = scantrans(s); |
| 745 | TERM(TRANS); |
| 746 | } |
| 747 | yylval.cval = savestr(d); |
| 748 | OPERATOR(WORD); |
| 749 | case 'z': case 'Z': |
| 750 | SNARFWORD; |
| 751 | yylval.cval = savestr(d); |
| 752 | OPERATOR(WORD); |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | STAB * |
| 757 | stabent(name,add) |
| 758 | register char *name; |
| 759 | int add; |
| 760 | { |
| 761 | register STAB *stab; |
| 762 | |
| 763 | for (stab = stab_index[*name]; stab; stab = stab->stab_next) { |
| 764 | if (strEQ(name,stab->stab_name)) |
| 765 | return stab; |
| 766 | } |
| 767 | |
| 768 | /* no entry--should we add one? */ |
| 769 | |
| 770 | if (add) { |
| 771 | stab = (STAB *) safemalloc(sizeof(STAB)); |
| 772 | bzero((char*)stab, sizeof(STAB)); |
| 773 | stab->stab_name = savestr(name); |
| 774 | stab->stab_val = str_new(0); |
| 775 | stab->stab_next = stab_index[*name]; |
| 776 | stab_index[*name] = stab; |
| 777 | return stab; |
| 778 | } |
| 779 | return Nullstab; |
| 780 | } |
| 781 | |
| 782 | STIO * |
| 783 | stio_new() |
| 784 | { |
| 785 | STIO *stio = (STIO *) safemalloc(sizeof(STIO)); |
| 786 | |
| 787 | bzero((char*)stio, sizeof(STIO)); |
| 788 | stio->page_len = 60; |
| 789 | return stio; |
| 790 | } |
| 791 | |
| 792 | char * |
| 793 | scanreg(s,dest) |
| 794 | register char *s; |
| 795 | char *dest; |
| 796 | { |
| 797 | register char *d; |
| 798 | |
| 799 | s++; |
| 800 | d = dest; |
| 801 | while (isalpha(*s) || isdigit(*s) || *s == '_') |
| 802 | *d++ = *s++; |
| 803 | *d = '\0'; |
| 804 | d = dest; |
| 805 | if (!*d) { |
| 806 | *d = *s++; |
| 807 | if (*d == '{') { |
| 808 | d = dest; |
| 809 | while (*s && *s != '}') |
| 810 | *d++ = *s++; |
| 811 | *d = '\0'; |
| 812 | d = dest; |
| 813 | if (*s) |
| 814 | s++; |
| 815 | } |
| 816 | else |
| 817 | d[1] = '\0'; |
| 818 | } |
| 819 | if (*d == '^' && !isspace(*s)) |
| 820 | *d = *s++ & 31; |
| 821 | return s; |
| 822 | } |
| 823 | |
| 824 | STR * |
| 825 | scanconst(string) |
| 826 | char *string; |
| 827 | { |
| 828 | register STR *retstr; |
| 829 | register char *t; |
| 830 | register char *d; |
| 831 | |
| 832 | if (index(string,'|')) { |
| 833 | return Nullstr; |
| 834 | } |
| 835 | retstr = str_make(string); |
| 836 | t = str_get(retstr); |
| 837 | for (d=t; *d; ) { |
| 838 | switch (*d) { |
| 839 | case '.': case '[': case '$': case '(': case ')': case '|': |
| 840 | *d = '\0'; |
| 841 | break; |
| 842 | case '\\': |
| 843 | if (index("wWbB0123456789",d[1])) { |
| 844 | *d = '\0'; |
| 845 | break; |
| 846 | } |
| 847 | strcpy(d,d+1); |
| 848 | switch(*d) { |
| 849 | case 'n': |
| 850 | *d = '\n'; |
| 851 | break; |
| 852 | case 't': |
| 853 | *d = '\t'; |
| 854 | break; |
| 855 | case 'f': |
| 856 | *d = '\f'; |
| 857 | break; |
| 858 | case 'r': |
| 859 | *d = '\r'; |
| 860 | break; |
| 861 | } |
| 862 | /* FALL THROUGH */ |
| 863 | default: |
| 864 | if (d[1] == '*' || d[1] == '+' || d[1] == '?') { |
| 865 | *d = '\0'; |
| 866 | break; |
| 867 | } |
| 868 | d++; |
| 869 | } |
| 870 | } |
| 871 | if (!*t) { |
| 872 | str_free(retstr); |
| 873 | return Nullstr; |
| 874 | } |
| 875 | retstr->str_cur = strlen(retstr->str_ptr); /* XXX cheating here */ |
| 876 | return retstr; |
| 877 | } |
| 878 | |
| 879 | char * |
| 880 | scanpat(s) |
| 881 | register char *s; |
| 882 | { |
| 883 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
| 884 | register char *d; |
| 885 | |
| 886 | bzero((char *)spat, sizeof(SPAT)); |
| 887 | spat->spat_next = spat_root; /* link into spat list */ |
| 888 | spat_root = spat; |
| 889 | init_compex(&spat->spat_compex); |
| 890 | |
| 891 | switch (*s++) { |
| 892 | case 'm': |
| 893 | s++; |
| 894 | break; |
| 895 | case '/': |
| 896 | break; |
| 897 | case '?': |
| 898 | spat->spat_flags |= SPAT_USE_ONCE; |
| 899 | break; |
| 900 | default: |
| 901 | fatal("Search pattern not found:\n%s",str_get(linestr)); |
| 902 | } |
| 903 | s = cpytill(tokenbuf,s,s[-1]); |
| 904 | if (!*s) |
| 905 | fatal("Search pattern not terminated:\n%s",str_get(linestr)); |
| 906 | s++; |
| 907 | if (*tokenbuf == '^') { |
| 908 | spat->spat_first = scanconst(tokenbuf+1); |
| 909 | if (spat->spat_first) { |
| 910 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
| 911 | if (spat->spat_flen == strlen(tokenbuf+1)) |
| 912 | spat->spat_flags |= SPAT_SCANALL; |
| 913 | } |
| 914 | } |
| 915 | else { |
| 916 | spat->spat_flags |= SPAT_SCANFIRST; |
| 917 | spat->spat_first = scanconst(tokenbuf); |
| 918 | if (spat->spat_first) { |
| 919 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
| 920 | if (spat->spat_flen == strlen(tokenbuf)) |
| 921 | spat->spat_flags |= SPAT_SCANALL; |
| 922 | } |
| 923 | } |
| 924 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) |
| 925 | fatal(d); |
| 926 | yylval.arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); |
| 927 | return s; |
| 928 | } |
| 929 | |
| 930 | char * |
| 931 | scansubst(s) |
| 932 | register char *s; |
| 933 | { |
| 934 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
| 935 | register char *d; |
| 936 | |
| 937 | bzero((char *)spat, sizeof(SPAT)); |
| 938 | spat->spat_next = spat_root; /* link into spat list */ |
| 939 | spat_root = spat; |
| 940 | init_compex(&spat->spat_compex); |
| 941 | |
| 942 | s = cpytill(tokenbuf,s+1,*s); |
| 943 | if (!*s) |
| 944 | fatal("Substitution pattern not terminated:\n%s",str_get(linestr)); |
| 945 | for (d=tokenbuf; *d; d++) { |
| 946 | if (*d == '$' && d[1] && d[-1] != '\\' && d[1] != '|') { |
| 947 | register ARG *arg; |
| 948 | |
| 949 | spat->spat_runtime = arg = op_new(1); |
| 950 | arg->arg_type = O_ITEM; |
| 951 | arg[1].arg_type = A_DOUBLE; |
| 952 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
| 953 | goto get_repl; /* skip compiling for now */ |
| 954 | } |
| 955 | } |
| 956 | if (*tokenbuf == '^') { |
| 957 | spat->spat_first = scanconst(tokenbuf+1); |
| 958 | if (spat->spat_first) |
| 959 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
| 960 | } |
| 961 | else { |
| 962 | spat->spat_flags |= SPAT_SCANFIRST; |
| 963 | spat->spat_first = scanconst(tokenbuf); |
| 964 | if (spat->spat_first) |
| 965 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
| 966 | } |
| 967 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) |
| 968 | fatal(d); |
| 969 | get_repl: |
| 970 | s = scanstr(s); |
| 971 | if (!*s) |
| 972 | fatal("Substitution replacement not terminated:\n%s",str_get(linestr)); |
| 973 | spat->spat_repl = yylval.arg; |
| 974 | if (*s == 'g') { |
| 975 | s++; |
| 976 | spat->spat_flags &= ~SPAT_USE_ONCE; |
| 977 | } |
| 978 | else |
| 979 | spat->spat_flags |= SPAT_USE_ONCE; |
| 980 | yylval.arg = make_match(O_SUBST,stab_to_arg(A_STAB,defstab),spat); |
| 981 | return s; |
| 982 | } |
| 983 | |
| 984 | ARG * |
| 985 | make_split(stab,arg) |
| 986 | register STAB *stab; |
| 987 | register ARG *arg; |
| 988 | { |
| 989 | if (arg->arg_type != O_MATCH) { |
| 990 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
| 991 | register char *d; |
| 992 | |
| 993 | bzero((char *)spat, sizeof(SPAT)); |
| 994 | spat->spat_next = spat_root; /* link into spat list */ |
| 995 | spat_root = spat; |
| 996 | init_compex(&spat->spat_compex); |
| 997 | |
| 998 | spat->spat_runtime = arg; |
| 999 | arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); |
| 1000 | } |
| 1001 | arg->arg_type = O_SPLIT; |
| 1002 | arg[2].arg_ptr.arg_spat->spat_repl = stab_to_arg(A_STAB,aadd(stab)); |
| 1003 | return arg; |
| 1004 | } |
| 1005 | |
| 1006 | char * |
| 1007 | expand_charset(s) |
| 1008 | register char *s; |
| 1009 | { |
| 1010 | char t[512]; |
| 1011 | register char *d = t; |
| 1012 | register int i; |
| 1013 | |
| 1014 | while (*s) { |
| 1015 | if (s[1] == '-' && s[2]) { |
| 1016 | for (i = s[0]; i <= s[2]; i++) |
| 1017 | *d++ = i; |
| 1018 | s += 3; |
| 1019 | } |
| 1020 | else |
| 1021 | *d++ = *s++; |
| 1022 | } |
| 1023 | *d = '\0'; |
| 1024 | return savestr(t); |
| 1025 | } |
| 1026 | |
| 1027 | char * |
| 1028 | scantrans(s) |
| 1029 | register char *s; |
| 1030 | { |
| 1031 | ARG *arg = |
| 1032 | l(make_op(O_TRANS,2,stab_to_arg(A_STAB,defstab),Nullarg,Nullarg,0)); |
| 1033 | register char *t; |
| 1034 | register char *r; |
| 1035 | register char *tbl = safemalloc(256); |
| 1036 | register int i; |
| 1037 | |
| 1038 | arg[2].arg_type = A_NULL; |
| 1039 | arg[2].arg_ptr.arg_cval = tbl; |
| 1040 | for (i=0; i<256; i++) |
| 1041 | tbl[i] = 0; |
| 1042 | s = scanstr(s); |
| 1043 | if (!*s) |
| 1044 | fatal("Translation pattern not terminated:\n%s",str_get(linestr)); |
| 1045 | t = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); |
| 1046 | free_arg(yylval.arg); |
| 1047 | s = scanstr(s-1); |
| 1048 | if (!*s) |
| 1049 | fatal("Translation replacement not terminated:\n%s",str_get(linestr)); |
| 1050 | r = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); |
| 1051 | free_arg(yylval.arg); |
| 1052 | yylval.arg = arg; |
| 1053 | if (!*r) { |
| 1054 | safefree(r); |
| 1055 | r = t; |
| 1056 | } |
| 1057 | for (i = 0; t[i]; i++) { |
| 1058 | if (!r[i]) |
| 1059 | r[i] = r[i-1]; |
| 1060 | tbl[t[i] & 0377] = r[i]; |
| 1061 | } |
| 1062 | if (r != t) |
| 1063 | safefree(r); |
| 1064 | safefree(t); |
| 1065 | return s; |
| 1066 | } |
| 1067 | |
| 1068 | CMD * |
| 1069 | block_head(tail) |
| 1070 | register CMD *tail; |
| 1071 | { |
| 1072 | if (tail == Nullcmd) { |
| 1073 | return tail; |
| 1074 | } |
| 1075 | return tail->c_head; |
| 1076 | } |
| 1077 | |
| 1078 | CMD * |
| 1079 | append_line(head,tail) |
| 1080 | register CMD *head; |
| 1081 | register CMD *tail; |
| 1082 | { |
| 1083 | if (tail == Nullcmd) |
| 1084 | return head; |
| 1085 | if (!tail->c_head) /* make sure tail is well formed */ |
| 1086 | tail->c_head = tail; |
| 1087 | if (head != Nullcmd) { |
| 1088 | tail = tail->c_head; /* get to start of tail list */ |
| 1089 | if (!head->c_head) |
| 1090 | head->c_head = head; /* start a new head list */ |
| 1091 | while (head->c_next) { |
| 1092 | head->c_next->c_head = head->c_head; |
| 1093 | head = head->c_next; /* get to end of head list */ |
| 1094 | } |
| 1095 | head->c_next = tail; /* link to end of old list */ |
| 1096 | tail->c_head = head->c_head; /* propagate head pointer */ |
| 1097 | } |
| 1098 | while (tail->c_next) { |
| 1099 | tail->c_next->c_head = tail->c_head; |
| 1100 | tail = tail->c_next; |
| 1101 | } |
| 1102 | return tail; |
| 1103 | } |
| 1104 | |
| 1105 | CMD * |
| 1106 | make_acmd(type,stab,cond,arg) |
| 1107 | int type; |
| 1108 | STAB *stab; |
| 1109 | ARG *cond; |
| 1110 | ARG *arg; |
| 1111 | { |
| 1112 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); |
| 1113 | |
| 1114 | bzero((char *)cmd, sizeof(CMD)); |
| 1115 | cmd->c_type = type; |
| 1116 | cmd->ucmd.acmd.ac_stab = stab; |
| 1117 | cmd->ucmd.acmd.ac_expr = arg; |
| 1118 | cmd->c_expr = cond; |
| 1119 | if (cond) { |
| 1120 | opt_arg(cmd,1); |
| 1121 | cmd->c_flags |= CF_COND; |
| 1122 | } |
| 1123 | return cmd; |
| 1124 | } |
| 1125 | |
| 1126 | CMD * |
| 1127 | make_ccmd(type,arg,cblock) |
| 1128 | int type; |
| 1129 | register ARG *arg; |
| 1130 | struct compcmd cblock; |
| 1131 | { |
| 1132 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); |
| 1133 | |
| 1134 | bzero((char *)cmd, sizeof(CMD)); |
| 1135 | cmd->c_type = type; |
| 1136 | cmd->c_expr = arg; |
| 1137 | cmd->ucmd.ccmd.cc_true = cblock.comp_true; |
| 1138 | cmd->ucmd.ccmd.cc_alt = cblock.comp_alt; |
| 1139 | if (arg) { |
| 1140 | opt_arg(cmd,1); |
| 1141 | cmd->c_flags |= CF_COND; |
| 1142 | } |
| 1143 | return cmd; |
| 1144 | } |
| 1145 | |
| 1146 | void |
| 1147 | opt_arg(cmd,fliporflop) |
| 1148 | register CMD *cmd; |
| 1149 | int fliporflop; |
| 1150 | { |
| 1151 | register ARG *arg; |
| 1152 | int opt = CFT_EVAL; |
| 1153 | int sure = 0; |
| 1154 | ARG *arg2; |
| 1155 | char *tmps; /* for True macro */ |
| 1156 | int context = 0; /* 0 = normal, 1 = before &&, 2 = before || */ |
| 1157 | int flp = fliporflop; |
| 1158 | |
| 1159 | if (!cmd) |
| 1160 | return; |
| 1161 | arg = cmd->c_expr; |
| 1162 | |
| 1163 | /* Turn "if (!expr)" into "unless (expr)" */ |
| 1164 | |
| 1165 | while (arg->arg_type == O_NOT && arg[1].arg_type == A_EXPR) { |
| 1166 | cmd->c_flags ^= CF_INVERT; /* flip sense of cmd */ |
| 1167 | cmd->c_expr = arg[1].arg_ptr.arg_arg; /* hoist the rest of expr */ |
| 1168 | free_arg(arg); |
| 1169 | arg = cmd->c_expr; /* here we go again */ |
| 1170 | } |
| 1171 | |
| 1172 | if (!arg->arg_len) { /* sanity check */ |
| 1173 | cmd->c_flags |= opt; |
| 1174 | return; |
| 1175 | } |
| 1176 | |
| 1177 | /* for "cond .. cond" we set up for the initial check */ |
| 1178 | |
| 1179 | if (arg->arg_type == O_FLIP) |
| 1180 | context |= 4; |
| 1181 | |
| 1182 | /* for "cond && expr" and "cond || expr" we can ignore expr, sort of */ |
| 1183 | |
| 1184 | if (arg->arg_type == O_AND) |
| 1185 | context |= 1; |
| 1186 | else if (arg->arg_type == O_OR) |
| 1187 | context |= 2; |
| 1188 | if (context && arg[flp].arg_type == A_EXPR) { |
| 1189 | arg = arg[flp].arg_ptr.arg_arg; |
| 1190 | flp = 1; |
| 1191 | } |
| 1192 | |
| 1193 | if (arg[flp].arg_flags & (AF_PRE|AF_POST)) { |
| 1194 | cmd->c_flags |= opt; |
| 1195 | return; /* side effect, can't optimize */ |
| 1196 | } |
| 1197 | |
| 1198 | if (arg->arg_type == O_ITEM || arg->arg_type == O_FLIP || |
| 1199 | arg->arg_type == O_AND || arg->arg_type == O_OR) { |
| 1200 | if (arg[flp].arg_type == A_SINGLE) { |
| 1201 | opt = (str_true(arg[flp].arg_ptr.arg_str) ? CFT_TRUE : CFT_FALSE); |
| 1202 | cmd->c_first = arg[flp].arg_ptr.arg_str; |
| 1203 | goto literal; |
| 1204 | } |
| 1205 | else if (arg[flp].arg_type == A_STAB || arg[flp].arg_type == A_LVAL) { |
| 1206 | cmd->c_stab = arg[flp].arg_ptr.arg_stab; |
| 1207 | opt = CFT_REG; |
| 1208 | literal: |
| 1209 | if (!context) { /* no && or ||? */ |
| 1210 | free_arg(arg); |
| 1211 | cmd->c_expr = Nullarg; |
| 1212 | } |
| 1213 | if (!(context & 1)) |
| 1214 | cmd->c_flags |= CF_EQSURE; |
| 1215 | if (!(context & 2)) |
| 1216 | cmd->c_flags |= CF_NESURE; |
| 1217 | } |
| 1218 | } |
| 1219 | else if (arg->arg_type == O_MATCH || arg->arg_type == O_SUBST || |
| 1220 | arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) { |
| 1221 | if ((arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && |
| 1222 | arg[2].arg_type == A_SPAT && |
| 1223 | arg[2].arg_ptr.arg_spat->spat_first ) { |
| 1224 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
| 1225 | cmd->c_first = arg[2].arg_ptr.arg_spat->spat_first; |
| 1226 | cmd->c_flen = arg[2].arg_ptr.arg_spat->spat_flen; |
| 1227 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANALL && |
| 1228 | (arg->arg_type == O_MATCH || arg->arg_type == O_NMATCH) ) |
| 1229 | sure |= CF_EQSURE; /* (SUBST must be forced even */ |
| 1230 | /* if we know it will work.) */ |
| 1231 | arg[2].arg_ptr.arg_spat->spat_first = Nullstr; |
| 1232 | arg[2].arg_ptr.arg_spat->spat_flen = 0; /* only one chk */ |
| 1233 | sure |= CF_NESURE; /* normally only sure if it fails */ |
| 1234 | if (arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) |
| 1235 | cmd->c_flags |= CF_FIRSTNEG; |
| 1236 | if (context & 1) { /* only sure if thing is false */ |
| 1237 | if (cmd->c_flags & CF_FIRSTNEG) |
| 1238 | sure &= ~CF_NESURE; |
| 1239 | else |
| 1240 | sure &= ~CF_EQSURE; |
| 1241 | } |
| 1242 | else if (context & 2) { /* only sure if thing is true */ |
| 1243 | if (cmd->c_flags & CF_FIRSTNEG) |
| 1244 | sure &= ~CF_EQSURE; |
| 1245 | else |
| 1246 | sure &= ~CF_NESURE; |
| 1247 | } |
| 1248 | if (sure & (CF_EQSURE|CF_NESURE)) { /* if we know anything*/ |
| 1249 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANFIRST) |
| 1250 | opt = CFT_SCAN; |
| 1251 | else |
| 1252 | opt = CFT_ANCHOR; |
| 1253 | if (sure == (CF_EQSURE|CF_NESURE) /* really sure? */ |
| 1254 | && arg->arg_type == O_MATCH |
| 1255 | && context & 4 |
| 1256 | && fliporflop == 1) { |
| 1257 | arg[2].arg_type = A_SINGLE; /* don't do twice */ |
| 1258 | arg[2].arg_ptr.arg_str = &str_yes; |
| 1259 | } |
| 1260 | cmd->c_flags |= sure; |
| 1261 | } |
| 1262 | } |
| 1263 | } |
| 1264 | else if (arg->arg_type == O_SEQ || arg->arg_type == O_SNE || |
| 1265 | arg->arg_type == O_SLT || arg->arg_type == O_SGT) { |
| 1266 | if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) { |
| 1267 | if (arg[2].arg_type == A_SINGLE) { |
| 1268 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
| 1269 | cmd->c_first = arg[2].arg_ptr.arg_str; |
| 1270 | cmd->c_flen = 30000; |
| 1271 | switch (arg->arg_type) { |
| 1272 | case O_SLT: case O_SGT: |
| 1273 | sure |= CF_EQSURE; |
| 1274 | cmd->c_flags |= CF_FIRSTNEG; |
| 1275 | break; |
| 1276 | case O_SNE: |
| 1277 | cmd->c_flags |= CF_FIRSTNEG; |
| 1278 | /* FALL THROUGH */ |
| 1279 | case O_SEQ: |
| 1280 | sure |= CF_NESURE|CF_EQSURE; |
| 1281 | break; |
| 1282 | } |
| 1283 | if (context & 1) { /* only sure if thing is false */ |
| 1284 | if (cmd->c_flags & CF_FIRSTNEG) |
| 1285 | sure &= ~CF_NESURE; |
| 1286 | else |
| 1287 | sure &= ~CF_EQSURE; |
| 1288 | } |
| 1289 | else if (context & 2) { /* only sure if thing is true */ |
| 1290 | if (cmd->c_flags & CF_FIRSTNEG) |
| 1291 | sure &= ~CF_EQSURE; |
| 1292 | else |
| 1293 | sure &= ~CF_NESURE; |
| 1294 | } |
| 1295 | if (sure & (CF_EQSURE|CF_NESURE)) { |
| 1296 | opt = CFT_STROP; |
| 1297 | cmd->c_flags |= sure; |
| 1298 | } |
| 1299 | } |
| 1300 | } |
| 1301 | } |
| 1302 | else if (arg->arg_type == O_ASSIGN && |
| 1303 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && |
| 1304 | arg[1].arg_ptr.arg_stab == defstab && |
| 1305 | arg[2].arg_type == A_EXPR ) { |
| 1306 | arg2 = arg[2].arg_ptr.arg_arg; |
| 1307 | if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) { |
| 1308 | opt = CFT_GETS; |
| 1309 | cmd->c_stab = arg2[1].arg_ptr.arg_stab; |
| 1310 | if (!(arg2[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV)) { |
| 1311 | free_arg(arg2); |
| 1312 | free_arg(arg); |
| 1313 | cmd->c_expr = Nullarg; |
| 1314 | } |
| 1315 | } |
| 1316 | } |
| 1317 | else if (arg->arg_type == O_CHOP && |
| 1318 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) ) { |
| 1319 | opt = CFT_CHOP; |
| 1320 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
| 1321 | free_arg(arg); |
| 1322 | cmd->c_expr = Nullarg; |
| 1323 | } |
| 1324 | if (context & 4) |
| 1325 | opt |= CF_FLIP; |
| 1326 | cmd->c_flags |= opt; |
| 1327 | |
| 1328 | if (cmd->c_flags & CF_FLIP) { |
| 1329 | if (fliporflop == 1) { |
| 1330 | arg = cmd->c_expr; /* get back to O_FLIP arg */ |
| 1331 | arg[3].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); |
| 1332 | bcopy((char *)cmd, (char *)arg[3].arg_ptr.arg_cmd, sizeof(CMD)); |
| 1333 | arg[4].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); |
| 1334 | bcopy((char *)cmd, (char *)arg[4].arg_ptr.arg_cmd, sizeof(CMD)); |
| 1335 | opt_arg(arg[4].arg_ptr.arg_cmd,2); |
| 1336 | arg->arg_len = 2; /* this is a lie */ |
| 1337 | } |
| 1338 | else { |
| 1339 | if ((opt & CF_OPTIMIZE) == CFT_EVAL) |
| 1340 | cmd->c_flags = (cmd->c_flags & ~CF_OPTIMIZE) | CFT_UNFLIP; |
| 1341 | } |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | ARG * |
| 1346 | mod_match(type,left,pat) |
| 1347 | register ARG *left; |
| 1348 | register ARG *pat; |
| 1349 | { |
| 1350 | |
| 1351 | register SPAT *spat; |
| 1352 | register ARG *newarg; |
| 1353 | |
| 1354 | if ((pat->arg_type == O_MATCH || |
| 1355 | pat->arg_type == O_SUBST || |
| 1356 | pat->arg_type == O_TRANS || |
| 1357 | pat->arg_type == O_SPLIT |
| 1358 | ) && |
| 1359 | pat[1].arg_ptr.arg_stab == defstab ) { |
| 1360 | switch (pat->arg_type) { |
| 1361 | case O_MATCH: |
| 1362 | newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH, |
| 1363 | pat->arg_len, |
| 1364 | left,Nullarg,Nullarg,0); |
| 1365 | break; |
| 1366 | case O_SUBST: |
| 1367 | newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST, |
| 1368 | pat->arg_len, |
| 1369 | left,Nullarg,Nullarg,0)); |
| 1370 | break; |
| 1371 | case O_TRANS: |
| 1372 | newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS, |
| 1373 | pat->arg_len, |
| 1374 | left,Nullarg,Nullarg,0)); |
| 1375 | break; |
| 1376 | case O_SPLIT: |
| 1377 | newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT, |
| 1378 | pat->arg_len, |
| 1379 | left,Nullarg,Nullarg,0); |
| 1380 | break; |
| 1381 | } |
| 1382 | if (pat->arg_len >= 2) { |
| 1383 | newarg[2].arg_type = pat[2].arg_type; |
| 1384 | newarg[2].arg_ptr = pat[2].arg_ptr; |
| 1385 | newarg[2].arg_flags = pat[2].arg_flags; |
| 1386 | if (pat->arg_len >= 3) { |
| 1387 | newarg[3].arg_type = pat[3].arg_type; |
| 1388 | newarg[3].arg_ptr = pat[3].arg_ptr; |
| 1389 | newarg[3].arg_flags = pat[3].arg_flags; |
| 1390 | } |
| 1391 | } |
| 1392 | safefree((char*)pat); |
| 1393 | } |
| 1394 | else { |
| 1395 | spat = (SPAT *) safemalloc(sizeof (SPAT)); |
| 1396 | bzero((char *)spat, sizeof(SPAT)); |
| 1397 | spat->spat_next = spat_root; /* link into spat list */ |
| 1398 | spat_root = spat; |
| 1399 | init_compex(&spat->spat_compex); |
| 1400 | |
| 1401 | spat->spat_runtime = pat; |
| 1402 | newarg = make_op(type,2,left,Nullarg,Nullarg,0); |
| 1403 | newarg[2].arg_type = A_SPAT; |
| 1404 | newarg[2].arg_ptr.arg_spat = spat; |
| 1405 | newarg[2].arg_flags = AF_SPECIAL; |
| 1406 | } |
| 1407 | |
| 1408 | return newarg; |
| 1409 | } |
| 1410 | |
| 1411 | CMD * |
| 1412 | add_label(lbl,cmd) |
| 1413 | char *lbl; |
| 1414 | register CMD *cmd; |
| 1415 | { |
| 1416 | if (cmd) |
| 1417 | cmd->c_label = lbl; |
| 1418 | return cmd; |
| 1419 | } |
| 1420 | |
| 1421 | CMD * |
| 1422 | addcond(cmd, arg) |
| 1423 | register CMD *cmd; |
| 1424 | register ARG *arg; |
| 1425 | { |
| 1426 | cmd->c_expr = arg; |
| 1427 | opt_arg(cmd,1); |
| 1428 | cmd->c_flags |= CF_COND; |
| 1429 | return cmd; |
| 1430 | } |
| 1431 | |
| 1432 | CMD * |
| 1433 | addloop(cmd, arg) |
| 1434 | register CMD *cmd; |
| 1435 | register ARG *arg; |
| 1436 | { |
| 1437 | cmd->c_expr = arg; |
| 1438 | opt_arg(cmd,1); |
| 1439 | cmd->c_flags |= CF_COND|CF_LOOP; |
| 1440 | if (cmd->c_type == C_BLOCK) |
| 1441 | cmd->c_flags &= ~CF_COND; |
| 1442 | else { |
| 1443 | arg = cmd->ucmd.acmd.ac_expr; |
| 1444 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_CMD) |
| 1445 | cmd->c_flags &= ~CF_COND; /* "do {} while" happens at least once */ |
| 1446 | if (arg && arg->arg_type == O_SUBR) |
| 1447 | cmd->c_flags &= ~CF_COND; /* likewise for "do subr() while" */ |
| 1448 | } |
| 1449 | return cmd; |
| 1450 | } |
| 1451 | |
| 1452 | CMD * |
| 1453 | invert(cmd) |
| 1454 | register CMD *cmd; |
| 1455 | { |
| 1456 | cmd->c_flags ^= CF_INVERT; |
| 1457 | return cmd; |
| 1458 | } |
| 1459 | |
| 1460 | yyerror(s) |
| 1461 | char *s; |
| 1462 | { |
| 1463 | char tmpbuf[128]; |
| 1464 | char *tname = tmpbuf; |
| 1465 | |
| 1466 | if (yychar > 256) { |
| 1467 | tname = tokename[yychar-256]; |
| 1468 | if (strEQ(tname,"word")) |
| 1469 | strcpy(tname,tokenbuf); |
| 1470 | else if (strEQ(tname,"register")) |
| 1471 | sprintf(tname,"$%s",tokenbuf); |
| 1472 | else if (strEQ(tname,"array_length")) |
| 1473 | sprintf(tname,"$#%s",tokenbuf); |
| 1474 | } |
| 1475 | else if (!yychar) |
| 1476 | strcpy(tname,"EOF"); |
| 1477 | else if (yychar < 32) |
| 1478 | sprintf(tname,"^%c",yychar+64); |
| 1479 | else if (yychar == 127) |
| 1480 | strcpy(tname,"^?"); |
| 1481 | else |
| 1482 | sprintf(tname,"%c",yychar); |
| 1483 | printf("%s in file %s at line %d, next token \"%s\"\n", |
| 1484 | s,filename,line,tname); |
| 1485 | } |
| 1486 | |
| 1487 | char * |
| 1488 | scanstr(s) |
| 1489 | register char *s; |
| 1490 | { |
| 1491 | register char term; |
| 1492 | register char *d; |
| 1493 | register ARG *arg; |
| 1494 | register bool makesingle = FALSE; |
| 1495 | char *leave = "\\$nrtfb0123456789"; /* which backslash sequences to keep */ |
| 1496 | |
| 1497 | arg = op_new(1); |
| 1498 | yylval.arg = arg; |
| 1499 | arg->arg_type = O_ITEM; |
| 1500 | |
| 1501 | switch (*s) { |
| 1502 | default: /* a substitution replacement */ |
| 1503 | arg[1].arg_type = A_DOUBLE; |
| 1504 | makesingle = TRUE; /* maybe disable runtime scanning */ |
| 1505 | term = *s; |
| 1506 | if (term == '\'') |
| 1507 | leave = Nullch; |
| 1508 | goto snarf_it; |
| 1509 | case '0': |
| 1510 | { |
| 1511 | long i; |
| 1512 | int shift; |
| 1513 | |
| 1514 | arg[1].arg_type = A_SINGLE; |
| 1515 | if (s[1] == 'x') { |
| 1516 | shift = 4; |
| 1517 | s += 2; |
| 1518 | } |
| 1519 | else if (s[1] == '.') |
| 1520 | goto decimal; |
| 1521 | else |
| 1522 | shift = 3; |
| 1523 | i = 0; |
| 1524 | for (;;) { |
| 1525 | switch (*s) { |
| 1526 | default: |
| 1527 | goto out; |
| 1528 | case '8': case '9': |
| 1529 | if (shift != 4) |
| 1530 | fatal("Illegal octal digit at line %d",line); |
| 1531 | /* FALL THROUGH */ |
| 1532 | case '0': case '1': case '2': case '3': case '4': |
| 1533 | case '5': case '6': case '7': |
| 1534 | i <<= shift; |
| 1535 | i += *s++ & 15; |
| 1536 | break; |
| 1537 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 1538 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| 1539 | if (shift != 4) |
| 1540 | goto out; |
| 1541 | i <<= 4; |
| 1542 | i += (*s++ & 7) + 9; |
| 1543 | break; |
| 1544 | } |
| 1545 | } |
| 1546 | out: |
| 1547 | sprintf(tokenbuf,"%d",i); |
| 1548 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
| 1549 | } |
| 1550 | break; |
| 1551 | case '1': case '2': case '3': case '4': case '5': |
| 1552 | case '6': case '7': case '8': case '9': case '.': |
| 1553 | decimal: |
| 1554 | arg[1].arg_type = A_SINGLE; |
| 1555 | d = tokenbuf; |
| 1556 | while (isdigit(*s) || *s == '_') |
| 1557 | *d++ = *s++; |
| 1558 | if (*s == '.' && index("0123456789eE",s[1])) |
| 1559 | *d++ = *s++; |
| 1560 | while (isdigit(*s) || *s == '_') |
| 1561 | *d++ = *s++; |
| 1562 | if (index("eE",*s) && index("+-0123456789",s[1])) |
| 1563 | *d++ = *s++; |
| 1564 | if (*s == '+' || *s == '-') |
| 1565 | *d++ = *s++; |
| 1566 | while (isdigit(*s)) |
| 1567 | *d++ = *s++; |
| 1568 | *d = '\0'; |
| 1569 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
| 1570 | break; |
| 1571 | case '\'': |
| 1572 | arg[1].arg_type = A_SINGLE; |
| 1573 | term = *s; |
| 1574 | leave = Nullch; |
| 1575 | goto snarf_it; |
| 1576 | |
| 1577 | case '<': |
| 1578 | arg[1].arg_type = A_READ; |
| 1579 | s = cpytill(tokenbuf,s+1,'>'); |
| 1580 | if (!*tokenbuf) |
| 1581 | strcpy(tokenbuf,"ARGV"); |
| 1582 | if (*s) |
| 1583 | s++; |
| 1584 | if (rsfp == stdin && strEQ(tokenbuf,"stdin")) |
| 1585 | fatal("Can't get both program and data from <stdin>\n"); |
| 1586 | arg[1].arg_ptr.arg_stab = stabent(tokenbuf,TRUE); |
| 1587 | arg[1].arg_ptr.arg_stab->stab_io = stio_new(); |
| 1588 | if (strEQ(tokenbuf,"ARGV")) { |
| 1589 | aadd(arg[1].arg_ptr.arg_stab); |
| 1590 | arg[1].arg_ptr.arg_stab->stab_io->flags |= IOF_ARGV|IOF_START; |
| 1591 | } |
| 1592 | break; |
| 1593 | case '"': |
| 1594 | arg[1].arg_type = A_DOUBLE; |
| 1595 | makesingle = TRUE; /* maybe disable runtime scanning */ |
| 1596 | term = *s; |
| 1597 | goto snarf_it; |
| 1598 | case '`': |
| 1599 | arg[1].arg_type = A_BACKTICK; |
| 1600 | term = *s; |
| 1601 | snarf_it: |
| 1602 | { |
| 1603 | STR *tmpstr; |
| 1604 | int sqstart = line; |
| 1605 | char *tmps; |
| 1606 | |
| 1607 | tmpstr = str_new(strlen(s)); |
| 1608 | s = str_append_till(tmpstr,s+1,term,leave); |
| 1609 | while (!*s) { /* multiple line string? */ |
| 1610 | s = str_gets(linestr, rsfp); |
| 1611 | if (!*s) |
| 1612 | fatal("EOF in string at line %d\n",sqstart); |
| 1613 | line++; |
| 1614 | s = str_append_till(tmpstr,s,term,leave); |
| 1615 | } |
| 1616 | s++; |
| 1617 | if (term == '\'') { |
| 1618 | arg[1].arg_ptr.arg_str = tmpstr; |
| 1619 | break; |
| 1620 | } |
| 1621 | tmps = s; |
| 1622 | s = d = tmpstr->str_ptr; /* assuming shrinkage only */ |
| 1623 | while (*s) { |
| 1624 | if (*s == '$' && s[1]) { |
| 1625 | makesingle = FALSE; /* force interpretation */ |
| 1626 | if (!isalpha(s[1])) { /* an internal register? */ |
| 1627 | int len; |
| 1628 | |
| 1629 | len = scanreg(s,tokenbuf) - s; |
| 1630 | stabent(tokenbuf,TRUE); /* make sure it's created */ |
| 1631 | while (len--) |
| 1632 | *d++ = *s++; |
| 1633 | continue; |
| 1634 | } |
| 1635 | } |
| 1636 | else if (*s == '\\' && s[1]) { |
| 1637 | s++; |
| 1638 | switch (*s) { |
| 1639 | default: |
| 1640 | defchar: |
| 1641 | if (!leave || index(leave,*s)) |
| 1642 | *d++ = '\\'; |
| 1643 | *d++ = *s++; |
| 1644 | continue; |
| 1645 | case '0': case '1': case '2': case '3': |
| 1646 | case '4': case '5': case '6': case '7': |
| 1647 | *d = *s++ - '0'; |
| 1648 | if (index("01234567",*s)) { |
| 1649 | *d <<= 3; |
| 1650 | *d += *s++ - '0'; |
| 1651 | } |
| 135863df |
1652 | else if (!index("`\"",term)) { /* oops, a subpattern */ |
| 8d063cd8 |
1653 | s--; |
| 1654 | goto defchar; |
| 1655 | } |
| 1656 | if (index("01234567",*s)) { |
| 1657 | *d <<= 3; |
| 1658 | *d += *s++ - '0'; |
| 1659 | } |
| 1660 | d++; |
| 1661 | continue; |
| 1662 | case 'b': |
| 1663 | *d++ = '\b'; |
| 1664 | break; |
| 1665 | case 'n': |
| 1666 | *d++ = '\n'; |
| 1667 | break; |
| 1668 | case 'r': |
| 1669 | *d++ = '\r'; |
| 1670 | break; |
| 1671 | case 'f': |
| 1672 | *d++ = '\f'; |
| 1673 | break; |
| 1674 | case 't': |
| 1675 | *d++ = '\t'; |
| 1676 | break; |
| 1677 | } |
| 1678 | s++; |
| 1679 | continue; |
| 1680 | } |
| 1681 | *d++ = *s++; |
| 1682 | } |
| 1683 | *d = '\0'; |
| 1684 | if (arg[1].arg_type == A_DOUBLE) { |
| 1685 | if (makesingle) |
| 1686 | arg[1].arg_type = A_SINGLE; /* now we can optimize on it */ |
| 1687 | else |
| 1688 | leave = "\\"; |
| 1689 | for (d = s = tmpstr->str_ptr; *s; *d++ = *s++) { |
| 1690 | if (*s == '\\' && (!leave || index(leave,s[1]))) |
| 1691 | s++; |
| 1692 | } |
| 1693 | *d = '\0'; |
| 1694 | } |
| 1695 | tmpstr->str_cur = d - tmpstr->str_ptr; /* XXX cheat */ |
| 1696 | arg[1].arg_ptr.arg_str = tmpstr; |
| 1697 | s = tmps; |
| 1698 | break; |
| 1699 | } |
| 1700 | } |
| 1701 | return s; |
| 1702 | } |
| 1703 | |
| 1704 | ARG * |
| 1705 | make_op(type,newlen,arg1,arg2,arg3,dolist) |
| 1706 | int type; |
| 1707 | int newlen; |
| 1708 | ARG *arg1; |
| 1709 | ARG *arg2; |
| 1710 | ARG *arg3; |
| 1711 | int dolist; |
| 1712 | { |
| 1713 | register ARG *arg; |
| 1714 | register ARG *chld; |
| 1715 | register int doarg; |
| 1716 | |
| 1717 | arg = op_new(newlen); |
| 1718 | arg->arg_type = type; |
| 1719 | doarg = opargs[type]; |
| 1720 | if (chld = arg1) { |
| 1721 | if (!(doarg & 1)) |
| 1722 | arg[1].arg_flags |= AF_SPECIAL; |
| 1723 | if (doarg & 16) |
| 1724 | arg[1].arg_flags |= AF_NUMERIC; |
| 1725 | if (chld->arg_type == O_ITEM && |
| 1726 | (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL) ) { |
| 1727 | arg[1].arg_type = chld[1].arg_type; |
| 1728 | arg[1].arg_ptr = chld[1].arg_ptr; |
| 1729 | arg[1].arg_flags |= chld[1].arg_flags; |
| 1730 | free_arg(chld); |
| 1731 | } |
| 1732 | else { |
| 1733 | arg[1].arg_type = A_EXPR; |
| 1734 | arg[1].arg_ptr.arg_arg = chld; |
| 1735 | if (dolist & 1) { |
| 1736 | if (chld->arg_type == O_LIST) { |
| 1737 | if (newlen == 1) { /* we can hoist entire list */ |
| 1738 | chld->arg_type = type; |
| 1739 | free_arg(arg); |
| 1740 | arg = chld; |
| 1741 | } |
| 1742 | else { |
| 1743 | arg[1].arg_flags |= AF_SPECIAL; |
| 1744 | } |
| 1745 | } |
| 1746 | else if (chld->arg_type == O_ARRAY && chld->arg_len == 1) |
| 1747 | arg[1].arg_flags |= AF_SPECIAL; |
| 1748 | } |
| 1749 | } |
| 1750 | } |
| 1751 | if (chld = arg2) { |
| 1752 | if (!(doarg & 2)) |
| 1753 | arg[2].arg_flags |= AF_SPECIAL; |
| 1754 | if (doarg & 32) |
| 1755 | arg[2].arg_flags |= AF_NUMERIC; |
| 1756 | if (chld->arg_type == O_ITEM && |
| 1757 | (hoistable[chld[1].arg_type] || |
| 1758 | (type == O_ASSIGN && |
| 1759 | (chld[1].arg_type == A_READ || |
| 1760 | chld[1].arg_type == A_DOUBLE || |
| 1761 | chld[1].arg_type == A_BACKTICK ) ) ) ) { |
| 1762 | arg[2].arg_type = chld[1].arg_type; |
| 1763 | arg[2].arg_ptr = chld[1].arg_ptr; |
| 1764 | free_arg(chld); |
| 1765 | } |
| 1766 | else { |
| 1767 | arg[2].arg_type = A_EXPR; |
| 1768 | arg[2].arg_ptr.arg_arg = chld; |
| 1769 | if ((dolist & 2) && |
| 1770 | (chld->arg_type == O_LIST || |
| 1771 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) |
| 1772 | arg[2].arg_flags |= AF_SPECIAL; |
| 1773 | } |
| 1774 | } |
| 1775 | if (chld = arg3) { |
| 1776 | if (!(doarg & 4)) |
| 1777 | arg[3].arg_flags |= AF_SPECIAL; |
| 1778 | if (doarg & 64) |
| 1779 | arg[3].arg_flags |= AF_NUMERIC; |
| 1780 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) { |
| 1781 | arg[3].arg_type = chld[1].arg_type; |
| 1782 | arg[3].arg_ptr = chld[1].arg_ptr; |
| 1783 | free_arg(chld); |
| 1784 | } |
| 1785 | else { |
| 1786 | arg[3].arg_type = A_EXPR; |
| 1787 | arg[3].arg_ptr.arg_arg = chld; |
| 1788 | if ((dolist & 4) && |
| 1789 | (chld->arg_type == O_LIST || |
| 1790 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) |
| 1791 | arg[3].arg_flags |= AF_SPECIAL; |
| 1792 | } |
| 1793 | } |
| 1794 | #ifdef DEBUGGING |
| 1795 | if (debug & 16) { |
| 1796 | fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]); |
| 1797 | if (arg1) |
| 1798 | fprintf(stderr,",%s=%lx", |
| 1799 | argname[arg[1].arg_type],arg[1].arg_ptr.arg_arg); |
| 1800 | if (arg2) |
| 1801 | fprintf(stderr,",%s=%lx", |
| 1802 | argname[arg[2].arg_type],arg[2].arg_ptr.arg_arg); |
| 1803 | if (arg3) |
| 1804 | fprintf(stderr,",%s=%lx", |
| 1805 | argname[arg[3].arg_type],arg[3].arg_ptr.arg_arg); |
| 1806 | fprintf(stderr,")\n"); |
| 1807 | } |
| 1808 | #endif |
| 1809 | evalstatic(arg); /* see if we can consolidate anything */ |
| 1810 | return arg; |
| 1811 | } |
| 1812 | |
| 1813 | /* turn 123 into 123 == $. */ |
| 1814 | |
| 1815 | ARG * |
| 1816 | flipflip(arg) |
| 1817 | register ARG *arg; |
| 1818 | { |
| 1819 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_SINGLE) { |
| 1820 | arg = (ARG*)saferealloc((char*)arg,3*sizeof(ARG)); |
| 1821 | arg->arg_type = O_EQ; |
| 1822 | arg->arg_len = 2; |
| 1823 | arg[2].arg_type = A_STAB; |
| 1824 | arg[2].arg_flags = 0; |
| 1825 | arg[2].arg_ptr.arg_stab = stabent(".",TRUE); |
| 1826 | } |
| 1827 | return arg; |
| 1828 | } |
| 1829 | |
| 1830 | void |
| 1831 | evalstatic(arg) |
| 1832 | register ARG *arg; |
| 1833 | { |
| 1834 | register STR *str; |
| 1835 | register STR *s1; |
| 1836 | register STR *s2; |
| 1837 | double value; /* must not be register */ |
| 1838 | register char *tmps; |
| 1839 | int i; |
| 1840 | double exp(), log(), sqrt(), modf(); |
| 1841 | char *crypt(); |
| 1842 | |
| 1843 | if (!arg || !arg->arg_len) |
| 1844 | return; |
| 1845 | |
| 1846 | if (arg[1].arg_type == A_SINGLE && |
| 1847 | (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) { |
| 1848 | str = str_new(0); |
| 1849 | s1 = arg[1].arg_ptr.arg_str; |
| 1850 | if (arg->arg_len > 1) |
| 1851 | s2 = arg[2].arg_ptr.arg_str; |
| 1852 | else |
| 1853 | s2 = Nullstr; |
| 1854 | switch (arg->arg_type) { |
| 1855 | default: |
| 1856 | str_free(str); |
| 1857 | str = Nullstr; /* can't be evaluated yet */ |
| 1858 | break; |
| 1859 | case O_CONCAT: |
| 1860 | str_sset(str,s1); |
| 1861 | str_scat(str,s2); |
| 1862 | break; |
| 1863 | case O_REPEAT: |
| 1864 | i = (int)str_gnum(s2); |
| 1865 | while (i--) |
| 1866 | str_scat(str,s1); |
| 1867 | break; |
| 1868 | case O_MULTIPLY: |
| 1869 | value = str_gnum(s1); |
| 1870 | str_numset(str,value * str_gnum(s2)); |
| 1871 | break; |
| 1872 | case O_DIVIDE: |
| 1873 | value = str_gnum(s1); |
| 1874 | str_numset(str,value / str_gnum(s2)); |
| 1875 | break; |
| 1876 | case O_MODULO: |
| 1877 | value = str_gnum(s1); |
| 1878 | str_numset(str,(double)(((long)value) % ((long)str_gnum(s2)))); |
| 1879 | break; |
| 1880 | case O_ADD: |
| 1881 | value = str_gnum(s1); |
| 1882 | str_numset(str,value + str_gnum(s2)); |
| 1883 | break; |
| 1884 | case O_SUBTRACT: |
| 1885 | value = str_gnum(s1); |
| 1886 | str_numset(str,value - str_gnum(s2)); |
| 1887 | break; |
| 1888 | case O_LEFT_SHIFT: |
| 1889 | value = str_gnum(s1); |
| 1890 | str_numset(str,(double)(((long)value) << ((long)str_gnum(s2)))); |
| 1891 | break; |
| 1892 | case O_RIGHT_SHIFT: |
| 1893 | value = str_gnum(s1); |
| 1894 | str_numset(str,(double)(((long)value) >> ((long)str_gnum(s2)))); |
| 1895 | break; |
| 1896 | case O_LT: |
| 1897 | value = str_gnum(s1); |
| 1898 | str_numset(str,(double)(value < str_gnum(s2))); |
| 1899 | break; |
| 1900 | case O_GT: |
| 1901 | value = str_gnum(s1); |
| 1902 | str_numset(str,(double)(value > str_gnum(s2))); |
| 1903 | break; |
| 1904 | case O_LE: |
| 1905 | value = str_gnum(s1); |
| 1906 | str_numset(str,(double)(value <= str_gnum(s2))); |
| 1907 | break; |
| 1908 | case O_GE: |
| 1909 | value = str_gnum(s1); |
| 1910 | str_numset(str,(double)(value >= str_gnum(s2))); |
| 1911 | break; |
| 1912 | case O_EQ: |
| 1913 | value = str_gnum(s1); |
| 1914 | str_numset(str,(double)(value == str_gnum(s2))); |
| 1915 | break; |
| 1916 | case O_NE: |
| 1917 | value = str_gnum(s1); |
| 1918 | str_numset(str,(double)(value != str_gnum(s2))); |
| 1919 | break; |
| 1920 | case O_BIT_AND: |
| 1921 | value = str_gnum(s1); |
| 1922 | str_numset(str,(double)(((long)value) & ((long)str_gnum(s2)))); |
| 1923 | break; |
| 1924 | case O_XOR: |
| 1925 | value = str_gnum(s1); |
| 1926 | str_numset(str,(double)(((long)value) ^ ((long)str_gnum(s2)))); |
| 1927 | break; |
| 1928 | case O_BIT_OR: |
| 1929 | value = str_gnum(s1); |
| 1930 | str_numset(str,(double)(((long)value) | ((long)str_gnum(s2)))); |
| 1931 | break; |
| 1932 | case O_AND: |
| 1933 | if (str_true(s1)) |
| 1934 | str = str_make(str_get(s2)); |
| 1935 | else |
| 1936 | str = str_make(str_get(s1)); |
| 1937 | break; |
| 1938 | case O_OR: |
| 1939 | if (str_true(s1)) |
| 1940 | str = str_make(str_get(s1)); |
| 1941 | else |
| 1942 | str = str_make(str_get(s2)); |
| 1943 | break; |
| 1944 | case O_COND_EXPR: |
| 1945 | if (arg[3].arg_type != A_SINGLE) { |
| 1946 | str_free(str); |
| 1947 | str = Nullstr; |
| 1948 | } |
| 1949 | else { |
| 1950 | str = str_make(str_get(str_true(s1) ? s2 : arg[3].arg_ptr.arg_str)); |
| 1951 | str_free(arg[3].arg_ptr.arg_str); |
| 1952 | } |
| 1953 | break; |
| 1954 | case O_NEGATE: |
| 1955 | str_numset(str,(double)(-str_gnum(s1))); |
| 1956 | break; |
| 1957 | case O_NOT: |
| 1958 | str_numset(str,(double)(!str_true(s1))); |
| 1959 | break; |
| 1960 | case O_COMPLEMENT: |
| 1961 | str_numset(str,(double)(~(long)str_gnum(s1))); |
| 1962 | break; |
| 1963 | case O_LENGTH: |
| 1964 | str_numset(str, (double)str_len(s1)); |
| 1965 | break; |
| 1966 | case O_SUBSTR: |
| 1967 | if (arg[3].arg_type != A_SINGLE || stabent("[",FALSE)) { |
| 1968 | str_free(str); /* making the fallacious assumption */ |
| 1969 | str = Nullstr; /* that any $[ occurs before substr()*/ |
| 1970 | } |
| 1971 | else { |
| 1972 | char *beg; |
| 1973 | int len = (int)str_gnum(s2); |
| 1974 | int tmp; |
| 1975 | |
| 1976 | for (beg = str_get(s1); *beg && len > 0; beg++,len--) ; |
| 1977 | len = (int)str_gnum(arg[3].arg_ptr.arg_str); |
| 1978 | str_free(arg[3].arg_ptr.arg_str); |
| 1979 | if (len > (tmp = strlen(beg))) |
| 1980 | len = tmp; |
| 1981 | str_nset(str,beg,len); |
| 1982 | } |
| 1983 | break; |
| 1984 | case O_SLT: |
| 1985 | tmps = str_get(s1); |
| 1986 | str_numset(str,(double)(strLT(tmps,str_get(s2)))); |
| 1987 | break; |
| 1988 | case O_SGT: |
| 1989 | tmps = str_get(s1); |
| 1990 | str_numset(str,(double)(strGT(tmps,str_get(s2)))); |
| 1991 | break; |
| 1992 | case O_SLE: |
| 1993 | tmps = str_get(s1); |
| 1994 | str_numset(str,(double)(strLE(tmps,str_get(s2)))); |
| 1995 | break; |
| 1996 | case O_SGE: |
| 1997 | tmps = str_get(s1); |
| 1998 | str_numset(str,(double)(strGE(tmps,str_get(s2)))); |
| 1999 | break; |
| 2000 | case O_SEQ: |
| 2001 | tmps = str_get(s1); |
| 2002 | str_numset(str,(double)(strEQ(tmps,str_get(s2)))); |
| 2003 | break; |
| 2004 | case O_SNE: |
| 2005 | tmps = str_get(s1); |
| 2006 | str_numset(str,(double)(strNE(tmps,str_get(s2)))); |
| 2007 | break; |
| 2008 | case O_CRYPT: |
| 2009 | tmps = str_get(s1); |
| 2010 | str_set(str,crypt(tmps,str_get(s2))); |
| 2011 | break; |
| 2012 | case O_EXP: |
| 2013 | str_numset(str,exp(str_gnum(s1))); |
| 2014 | break; |
| 2015 | case O_LOG: |
| 2016 | str_numset(str,log(str_gnum(s1))); |
| 2017 | break; |
| 2018 | case O_SQRT: |
| 2019 | str_numset(str,sqrt(str_gnum(s1))); |
| 2020 | break; |
| 2021 | case O_INT: |
| 2022 | modf(str_gnum(s1),&value); |
| 2023 | str_numset(str,value); |
| 2024 | break; |
| 2025 | case O_ORD: |
| 2026 | str_numset(str,(double)(*str_get(s1))); |
| 2027 | break; |
| 2028 | } |
| 2029 | if (str) { |
| 2030 | arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */ |
| 2031 | str_free(s1); |
| 2032 | str_free(s2); |
| 2033 | arg[1].arg_ptr.arg_str = str; |
| 2034 | } |
| 2035 | } |
| 2036 | } |
| 2037 | |
| 2038 | ARG * |
| 2039 | l(arg) |
| 2040 | register ARG *arg; |
| 2041 | { |
| 2042 | register int i; |
| 2043 | register ARG *arg1; |
| 2044 | |
| 2045 | arg->arg_flags |= AF_COMMON; /* XXX should cross-match */ |
| 2046 | |
| 2047 | /* see if it's an array reference */ |
| 2048 | |
| 2049 | if (arg[1].arg_type == A_EXPR) { |
| 2050 | arg1 = arg[1].arg_ptr.arg_arg; |
| 2051 | |
| 2052 | if (arg1->arg_type == O_LIST && arg->arg_type != O_ITEM) { |
| 2053 | /* assign to list */ |
| 2054 | arg[1].arg_flags |= AF_SPECIAL; |
| 2055 | arg[2].arg_flags |= AF_SPECIAL; |
| 2056 | for (i = arg1->arg_len; i >= 1; i--) { |
| 2057 | switch (arg1[i].arg_type) { |
| 2058 | case A_STAB: case A_LVAL: |
| 2059 | arg1[i].arg_type = A_LVAL; |
| 2060 | break; |
| 2061 | case A_EXPR: case A_LEXPR: |
| 2062 | arg1[i].arg_type = A_LEXPR; |
| 2063 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_ARRAY) |
| 2064 | arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY; |
| 2065 | else if (arg1[i].arg_ptr.arg_arg->arg_type == O_HASH) |
| 2066 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH; |
| 2067 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LARRAY) |
| 2068 | break; |
| 2069 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LHASH) |
| 2070 | break; |
| 2071 | /* FALL THROUGH */ |
| 2072 | default: |
| 2073 | sprintf(tokenbuf, |
| 2074 | "Illegal item (%s) as lvalue",argname[arg1[i].arg_type]); |
| 2075 | yyerror(tokenbuf); |
| 2076 | } |
| 2077 | } |
| 2078 | } |
| 2079 | else if (arg1->arg_type == O_ARRAY) { |
| 2080 | if (arg1->arg_len == 1 && arg->arg_type != O_ITEM) { |
| 2081 | /* assign to array */ |
| 2082 | arg[1].arg_flags |= AF_SPECIAL; |
| 2083 | arg[2].arg_flags |= AF_SPECIAL; |
| 2084 | } |
| 2085 | else |
| 2086 | arg1->arg_type = O_LARRAY; /* assign to array elem */ |
| 2087 | } |
| 2088 | else if (arg1->arg_type == O_HASH) |
| 2089 | arg1->arg_type = O_LHASH; |
| 2090 | else { |
| 2091 | sprintf(tokenbuf, |
| 2092 | "Illegal expression (%s) as lvalue",opname[arg1->arg_type]); |
| 2093 | yyerror(tokenbuf); |
| 2094 | } |
| 2095 | arg[1].arg_type = A_LEXPR; |
| 2096 | #ifdef DEBUGGING |
| 2097 | if (debug & 16) |
| 2098 | fprintf(stderr,"lval LEXPR\n"); |
| 2099 | #endif |
| 2100 | return arg; |
| 2101 | } |
| 2102 | |
| 2103 | /* not an array reference, should be a register name */ |
| 2104 | |
| 2105 | if (arg[1].arg_type != A_STAB && arg[1].arg_type != A_LVAL) { |
| 2106 | sprintf(tokenbuf, |
| 2107 | "Illegal item (%s) as lvalue",argname[arg[1].arg_type]); |
| 2108 | yyerror(tokenbuf); |
| 2109 | } |
| 2110 | arg[1].arg_type = A_LVAL; |
| 2111 | #ifdef DEBUGGING |
| 2112 | if (debug & 16) |
| 2113 | fprintf(stderr,"lval LVAL\n"); |
| 2114 | #endif |
| 2115 | return arg; |
| 2116 | } |
| 2117 | |
| 2118 | ARG * |
| 2119 | addflags(i,flags,arg) |
| 2120 | register ARG *arg; |
| 2121 | { |
| 2122 | arg[i].arg_flags |= flags; |
| 2123 | return arg; |
| 2124 | } |
| 2125 | |
| 2126 | ARG * |
| 2127 | hide_ary(arg) |
| 2128 | ARG *arg; |
| 2129 | { |
| 2130 | if (arg->arg_type == O_ARRAY) |
| 2131 | return make_op(O_ITEM,1,arg,Nullarg,Nullarg,0); |
| 2132 | return arg; |
| 2133 | } |
| 2134 | |
| 2135 | ARG * |
| 2136 | make_list(arg) |
| 2137 | register ARG *arg; |
| 2138 | { |
| 2139 | register int i; |
| 2140 | register ARG *node; |
| 2141 | register ARG *nxtnode; |
| 2142 | register int j; |
| 2143 | STR *tmpstr; |
| 2144 | |
| 2145 | if (!arg) { |
| 2146 | arg = op_new(0); |
| 2147 | arg->arg_type = O_LIST; |
| 2148 | } |
| 2149 | if (arg->arg_type != O_COMMA) { |
| 2150 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ |
| 2151 | return arg; |
| 2152 | } |
| 2153 | for (i = 2, node = arg; ; i++) { |
| 2154 | if (node->arg_len < 2) |
| 2155 | break; |
| 2156 | if (node[2].arg_type != A_EXPR) |
| 2157 | break; |
| 2158 | node = node[2].arg_ptr.arg_arg; |
| 2159 | if (node->arg_type != O_COMMA) |
| 2160 | break; |
| 2161 | } |
| 2162 | if (i > 2) { |
| 2163 | node = arg; |
| 2164 | arg = op_new(i); |
| 2165 | tmpstr = arg->arg_ptr.arg_str; |
| 2166 | *arg = *node; /* copy everything except the STR */ |
| 2167 | arg->arg_ptr.arg_str = tmpstr; |
| 2168 | for (j = 1; ; ) { |
| 2169 | arg[j++] = node[1]; |
| 2170 | if (j >= i) { |
| 2171 | arg[j] = node[2]; |
| 2172 | free_arg(node); |
| 2173 | break; |
| 2174 | } |
| 2175 | nxtnode = node[2].arg_ptr.arg_arg; |
| 2176 | free_arg(node); |
| 2177 | node = nxtnode; |
| 2178 | } |
| 2179 | } |
| 2180 | arg->arg_type = O_LIST; |
| 2181 | arg->arg_len = i; |
| 2182 | return arg; |
| 2183 | } |
| 2184 | |
| 2185 | /* turn a single item into a list */ |
| 2186 | |
| 2187 | ARG * |
| 2188 | listish(arg) |
| 2189 | ARG *arg; |
| 2190 | { |
| 2191 | if (arg->arg_flags & AF_LISTISH) |
| 2192 | arg = make_op(O_LIST,1,arg,Nullarg,Nullarg,0); |
| 2193 | return arg; |
| 2194 | } |
| 2195 | |
| 2196 | ARG * |
| 2197 | stab_to_arg(atype,stab) |
| 2198 | int atype; |
| 2199 | register STAB *stab; |
| 2200 | { |
| 2201 | register ARG *arg; |
| 2202 | |
| 2203 | arg = op_new(1); |
| 2204 | arg->arg_type = O_ITEM; |
| 2205 | arg[1].arg_type = atype; |
| 2206 | arg[1].arg_ptr.arg_stab = stab; |
| 2207 | return arg; |
| 2208 | } |
| 2209 | |
| 2210 | ARG * |
| 2211 | cval_to_arg(cval) |
| 2212 | register char *cval; |
| 2213 | { |
| 2214 | register ARG *arg; |
| 2215 | |
| 2216 | arg = op_new(1); |
| 2217 | arg->arg_type = O_ITEM; |
| 2218 | arg[1].arg_type = A_SINGLE; |
| 2219 | arg[1].arg_ptr.arg_str = str_make(cval); |
| 2220 | safefree(cval); |
| 2221 | return arg; |
| 2222 | } |
| 2223 | |
| 2224 | ARG * |
| 2225 | op_new(numargs) |
| 2226 | int numargs; |
| 2227 | { |
| 2228 | register ARG *arg; |
| 2229 | |
| 2230 | arg = (ARG*)safemalloc((numargs + 1) * sizeof (ARG)); |
| 2231 | bzero((char *)arg, (numargs + 1) * sizeof (ARG)); |
| 2232 | arg->arg_ptr.arg_str = str_new(0); |
| 2233 | arg->arg_len = numargs; |
| 2234 | return arg; |
| 2235 | } |
| 2236 | |
| 2237 | void |
| 2238 | free_arg(arg) |
| 2239 | ARG *arg; |
| 2240 | { |
| 2241 | str_free(arg->arg_ptr.arg_str); |
| 2242 | safefree((char*)arg); |
| 2243 | } |
| 2244 | |
| 2245 | ARG * |
| 2246 | make_match(type,expr,spat) |
| 2247 | int type; |
| 2248 | ARG *expr; |
| 2249 | SPAT *spat; |
| 2250 | { |
| 2251 | register ARG *arg; |
| 2252 | |
| 2253 | arg = make_op(type,2,expr,Nullarg,Nullarg,0); |
| 2254 | |
| 2255 | arg[2].arg_type = A_SPAT; |
| 2256 | arg[2].arg_ptr.arg_spat = spat; |
| 2257 | #ifdef DEBUGGING |
| 2258 | if (debug & 16) |
| 2259 | fprintf(stderr,"make_match SPAT=%lx\n",spat); |
| 2260 | #endif |
| 2261 | |
| 2262 | if (type == O_SUBST || type == O_NSUBST) { |
| 2263 | if (arg[1].arg_type != A_STAB) |
| 2264 | yyerror("Illegal lvalue"); |
| 2265 | arg[1].arg_type = A_LVAL; |
| 2266 | } |
| 2267 | return arg; |
| 2268 | } |
| 2269 | |
| 2270 | ARG * |
| 2271 | cmd_to_arg(cmd) |
| 2272 | CMD *cmd; |
| 2273 | { |
| 2274 | register ARG *arg; |
| 2275 | |
| 2276 | arg = op_new(1); |
| 2277 | arg->arg_type = O_ITEM; |
| 2278 | arg[1].arg_type = A_CMD; |
| 2279 | arg[1].arg_ptr.arg_cmd = cmd; |
| 2280 | return arg; |
| 2281 | } |
| 2282 | |
| 2283 | CMD * |
| 2284 | wopt(cmd) |
| 2285 | register CMD *cmd; |
| 2286 | { |
| 2287 | register CMD *tail; |
| 2288 | register ARG *arg = cmd->c_expr; |
| 2289 | char *tmps; /* used by True macro */ |
| 2290 | |
| 2291 | /* hoist "while (<channel>)" up into command block */ |
| 2292 | |
| 2293 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_READ) { |
| 2294 | cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */ |
| 2295 | cmd->c_flags |= CFT_GETS; /* and set it to do the input */ |
| 2296 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
| 2297 | if (arg[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV) { |
| 2298 | cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$_ =" */ |
| 2299 | stab_to_arg(A_LVAL,defstab), arg, Nullarg,1 )); |
| 2300 | } |
| 2301 | else { |
| 2302 | free_arg(arg); |
| 2303 | cmd->c_expr = Nullarg; |
| 2304 | } |
| 2305 | } |
| 2306 | |
| 2307 | /* First find the end of the true list */ |
| 2308 | |
| 2309 | if (cmd->ucmd.ccmd.cc_true == Nullcmd) |
| 2310 | return cmd; |
| 2311 | for (tail = cmd->ucmd.ccmd.cc_true; tail->c_next; tail = tail->c_next) ; |
| 2312 | |
| 2313 | /* if there's a continue block, link it to true block and find end */ |
| 2314 | |
| 2315 | if (cmd->ucmd.ccmd.cc_alt != Nullcmd) { |
| 2316 | tail->c_next = cmd->ucmd.ccmd.cc_alt; |
| 2317 | for ( ; tail->c_next; tail = tail->c_next) ; |
| 2318 | } |
| 2319 | |
| 2320 | /* Here's the real trick: link the end of the list back to the beginning, |
| 2321 | * inserting a "last" block to break out of the loop. This saves one or |
| 2322 | * two procedure calls every time through the loop, because of how cmd_exec |
| 2323 | * does tail recursion. |
| 2324 | */ |
| 2325 | |
| 2326 | tail->c_next = (CMD *) safemalloc(sizeof (CMD)); |
| 2327 | tail = tail->c_next; |
| 2328 | if (!cmd->ucmd.ccmd.cc_alt) |
| 2329 | cmd->ucmd.ccmd.cc_alt = tail; /* every loop has a continue now */ |
| 2330 | |
| 2331 | bcopy((char *)cmd, (char *)tail, sizeof(CMD)); |
| 2332 | tail->c_type = C_EXPR; |
| 2333 | tail->c_flags ^= CF_INVERT; /* turn into "last unless" */ |
| 2334 | tail->c_next = tail->ucmd.ccmd.cc_true; /* loop directly back to top */ |
| 2335 | tail->ucmd.acmd.ac_expr = make_op(O_LAST,0,Nullarg,Nullarg,Nullarg,0); |
| 2336 | tail->ucmd.acmd.ac_stab = Nullstab; |
| 2337 | return cmd; |
| 2338 | } |
| 2339 | |
| 2340 | FCMD * |
| 2341 | load_format() |
| 2342 | { |
| 2343 | FCMD froot; |
| 2344 | FCMD *flinebeg; |
| 2345 | register FCMD *fprev = &froot; |
| 2346 | register FCMD *fcmd; |
| 2347 | register char *s; |
| 2348 | register char *t; |
| 2349 | register char tmpchar; |
| 2350 | bool noblank; |
| 2351 | |
| 2352 | while ((s = str_gets(linestr,rsfp)) != Nullch) { |
| 2353 | line++; |
| 2354 | if (strEQ(s,".\n")) { |
| 2355 | bufptr = s; |
| 2356 | return froot.f_next; |
| 2357 | } |
| 2358 | if (*s == '#') |
| 2359 | continue; |
| 2360 | flinebeg = Nullfcmd; |
| 2361 | noblank = FALSE; |
| 2362 | while (*s) { |
| 2363 | fcmd = (FCMD *)safemalloc(sizeof (FCMD)); |
| 2364 | bzero((char*)fcmd, sizeof (FCMD)); |
| 2365 | fprev->f_next = fcmd; |
| 2366 | fprev = fcmd; |
| 2367 | for (t=s; *t && *t != '@' && *t != '^'; t++) { |
| 2368 | if (*t == '~') { |
| 2369 | noblank = TRUE; |
| 2370 | *t = ' '; |
| 2371 | } |
| 2372 | } |
| 2373 | tmpchar = *t; |
| 2374 | *t = '\0'; |
| 2375 | fcmd->f_pre = savestr(s); |
| 2376 | fcmd->f_presize = strlen(s); |
| 2377 | *t = tmpchar; |
| 2378 | s = t; |
| 2379 | if (!*s) { |
| 2380 | if (noblank) |
| 2381 | fcmd->f_flags |= FC_NOBLANK; |
| 2382 | break; |
| 2383 | } |
| 2384 | if (!flinebeg) |
| 2385 | flinebeg = fcmd; /* start values here */ |
| 2386 | if (*s++ == '^') |
| 2387 | fcmd->f_flags |= FC_CHOP; /* for doing text filling */ |
| 2388 | switch (*s) { |
| 2389 | case '*': |
| 2390 | fcmd->f_type = F_LINES; |
| 2391 | *s = '\0'; |
| 2392 | break; |
| 2393 | case '<': |
| 2394 | fcmd->f_type = F_LEFT; |
| 2395 | while (*s == '<') |
| 2396 | s++; |
| 2397 | break; |
| 2398 | case '>': |
| 2399 | fcmd->f_type = F_RIGHT; |
| 2400 | while (*s == '>') |
| 2401 | s++; |
| 2402 | break; |
| 2403 | case '|': |
| 2404 | fcmd->f_type = F_CENTER; |
| 2405 | while (*s == '|') |
| 2406 | s++; |
| 2407 | break; |
| 2408 | default: |
| 2409 | fcmd->f_type = F_LEFT; |
| 2410 | break; |
| 2411 | } |
| 2412 | if (fcmd->f_flags & FC_CHOP && *s == '.') { |
| 2413 | fcmd->f_flags |= FC_MORE; |
| 2414 | while (*s == '.') |
| 2415 | s++; |
| 2416 | } |
| 2417 | fcmd->f_size = s-t; |
| 2418 | } |
| 2419 | if (flinebeg) { |
| 2420 | again: |
| 2421 | if ((bufptr = str_gets(linestr ,rsfp)) == Nullch) |
| 2422 | goto badform; |
| 2423 | line++; |
| 2424 | if (strEQ(bufptr,".\n")) { |
| 2425 | yyerror("Missing values line"); |
| 2426 | return froot.f_next; |
| 2427 | } |
| 2428 | if (*bufptr == '#') |
| 2429 | goto again; |
| 2430 | lex_newlines = TRUE; |
| 2431 | while (flinebeg || *bufptr) { |
| 2432 | switch(yylex()) { |
| 2433 | default: |
| 2434 | yyerror("Bad value in format"); |
| 2435 | *bufptr = '\0'; |
| 2436 | break; |
| 2437 | case '\n': |
| 2438 | if (flinebeg) |
| 2439 | yyerror("Missing value in format"); |
| 2440 | *bufptr = '\0'; |
| 2441 | break; |
| 2442 | case REG: |
| 2443 | yylval.arg = stab_to_arg(A_LVAL,yylval.stabval); |
| 2444 | /* FALL THROUGH */ |
| 2445 | case RSTRING: |
| 2446 | if (!flinebeg) |
| 2447 | yyerror("Extra value in format"); |
| 2448 | else { |
| 2449 | flinebeg->f_expr = yylval.arg; |
| 2450 | do { |
| 2451 | flinebeg = flinebeg->f_next; |
| 2452 | } while (flinebeg && flinebeg->f_size == 0); |
| 2453 | } |
| 2454 | break; |
| 2455 | case ',': case ';': |
| 2456 | continue; |
| 2457 | } |
| 2458 | } |
| 2459 | lex_newlines = FALSE; |
| 2460 | } |
| 2461 | } |
| 2462 | badform: |
| 2463 | bufptr = str_get(linestr); |
| 2464 | yyerror("Format not terminated"); |
| 2465 | return froot.f_next; |
| 2466 | } |
projects / p5sagit/p5-mst-13.2.git / blame