Commit | Line | Data |
a559c259 |
1 | char rcsid[] = "$Header: perly.c,v 1.0.1.3 88/01/28 10:28:31 root Exp $"; |
8d063cd8 |
2 | /* |
3 | * $Log: perly.c,v $ |
a559c259 |
4 | * Revision 1.0.1.3 88/01/28 10:28:31 root |
5 | * patch8: added eval operator. Also fixed expectterm following right curly. |
6 | * |
135863df |
7 | * Revision 1.0.1.2 88/01/24 00:06:03 root |
8 | * patch 2: s/(abc)/\1/ grandfathering didn't work right. |
9 | * |
36ce8bec |
10 | * Revision 1.0.1.1 88/01/21 21:25:57 root |
11 | * Now uses CPP and CPPMINUS symbols from config.h. |
12 | * |
8d063cd8 |
13 | * Revision 1.0 87/12/18 15:53:31 root |
14 | * Initial revision |
15 | * |
16 | */ |
17 | |
18 | bool preprocess = FALSE; |
19 | bool assume_n = FALSE; |
20 | bool assume_p = FALSE; |
21 | bool doswitches = FALSE; |
a559c259 |
22 | bool allstabs = FALSE; /* init all customary symbols in symbol table?*/ |
8d063cd8 |
23 | char *filename; |
24 | char *e_tmpname = "/tmp/perl-eXXXXXX"; |
25 | FILE *e_fp = Nullfp; |
26 | ARG *l(); |
27 | |
28 | main(argc,argv,env) |
29 | register int argc; |
30 | register char **argv; |
31 | register char **env; |
32 | { |
33 | register STR *str; |
34 | register char *s; |
35 | char *index(); |
36 | |
37 | linestr = str_new(80); |
38 | str = str_make("-I/usr/lib/perl "); /* first used for -I flags */ |
39 | for (argc--,argv++; argc; argc--,argv++) { |
40 | if (argv[0][0] != '-' || !argv[0][1]) |
41 | break; |
42 | reswitch: |
43 | switch (argv[0][1]) { |
44 | #ifdef DEBUGGING |
45 | case 'D': |
46 | debug = atoi(argv[0]+2); |
47 | #ifdef YYDEBUG |
48 | yydebug = (debug & 1); |
49 | #endif |
50 | break; |
51 | #endif |
52 | case 'e': |
53 | if (!e_fp) { |
54 | mktemp(e_tmpname); |
55 | e_fp = fopen(e_tmpname,"w"); |
56 | } |
57 | if (argv[1]) |
58 | fputs(argv[1],e_fp); |
59 | putc('\n', e_fp); |
60 | argc--,argv++; |
61 | break; |
62 | case 'i': |
63 | inplace = savestr(argv[0]+2); |
64 | argvoutstab = stabent("ARGVOUT",TRUE); |
65 | break; |
66 | case 'I': |
67 | str_cat(str,argv[0]); |
68 | str_cat(str," "); |
69 | if (!argv[0][2]) { |
70 | str_cat(str,argv[1]); |
71 | argc--,argv++; |
72 | str_cat(str," "); |
73 | } |
74 | break; |
75 | case 'n': |
76 | assume_n = TRUE; |
77 | strcpy(argv[0], argv[0]+1); |
78 | goto reswitch; |
79 | case 'p': |
80 | assume_p = TRUE; |
81 | strcpy(argv[0], argv[0]+1); |
82 | goto reswitch; |
83 | case 'P': |
84 | preprocess = TRUE; |
85 | strcpy(argv[0], argv[0]+1); |
86 | goto reswitch; |
87 | case 's': |
88 | doswitches = TRUE; |
89 | strcpy(argv[0], argv[0]+1); |
90 | goto reswitch; |
91 | case 'v': |
92 | version(); |
93 | exit(0); |
94 | case '-': |
95 | argc--,argv++; |
96 | goto switch_end; |
97 | case 0: |
98 | break; |
99 | default: |
100 | fatal("Unrecognized switch: %s\n",argv[0]); |
101 | } |
102 | } |
103 | switch_end: |
104 | if (e_fp) { |
105 | fclose(e_fp); |
106 | argc++,argv--; |
107 | argv[0] = e_tmpname; |
108 | } |
109 | |
110 | str_set(&str_no,No); |
111 | str_set(&str_yes,Yes); |
112 | init_eval(); |
113 | |
114 | /* open script */ |
115 | |
116 | if (argv[0] == Nullch) |
117 | argv[0] = "-"; |
118 | filename = savestr(argv[0]); |
119 | if (strEQ(filename,"-")) |
120 | argv[0] = ""; |
121 | if (preprocess) { |
122 | sprintf(buf, "\ |
123 | /bin/sed -e '/^[^#]/b' \ |
124 | -e '/^#[ ]*include[ ]/b' \ |
125 | -e '/^#[ ]*define[ ]/b' \ |
126 | -e '/^#[ ]*if[ ]/b' \ |
127 | -e '/^#[ ]*ifdef[ ]/b' \ |
128 | -e '/^#[ ]*else/b' \ |
129 | -e '/^#[ ]*endif/b' \ |
130 | -e 's/^#.*//' \ |
36ce8bec |
131 | %s | %s -C %s%s", |
132 | argv[0], CPP, str_get(str), CPPMINUS); |
8d063cd8 |
133 | rsfp = popen(buf,"r"); |
134 | } |
135 | else if (!*argv[0]) |
136 | rsfp = stdin; |
137 | else |
138 | rsfp = fopen(argv[0],"r"); |
139 | if (rsfp == Nullfp) |
140 | fatal("Perl script \"%s\" doesn't seem to exist.\n",filename); |
141 | str_free(str); /* free -I directories */ |
142 | |
143 | defstab = stabent("_",TRUE); |
144 | |
145 | /* init tokener */ |
146 | |
147 | bufptr = str_get(linestr); |
148 | |
149 | /* now parse the report spec */ |
150 | |
151 | if (yyparse()) |
152 | fatal("Execution aborted due to compilation errors.\n"); |
153 | |
154 | if (e_fp) { |
155 | e_fp = Nullfp; |
156 | UNLINK(e_tmpname); |
157 | } |
158 | argc--,argv++; /* skip name of script */ |
159 | if (doswitches) { |
160 | for (; argc > 0 && **argv == '-'; argc--,argv++) { |
161 | if (argv[0][1] == '-') { |
162 | argc--,argv++; |
163 | break; |
164 | } |
165 | str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0); |
166 | } |
167 | } |
a559c259 |
168 | if (argvstab = stabent("ARGV",allstabs)) { |
8d063cd8 |
169 | for (; argc > 0; argc--,argv++) { |
170 | apush(argvstab->stab_array,str_make(argv[0])); |
171 | } |
172 | } |
a559c259 |
173 | if (envstab = stabent("ENV",allstabs)) { |
8d063cd8 |
174 | for (; *env; env++) { |
175 | if (!(s = index(*env,'='))) |
176 | continue; |
177 | *s++ = '\0'; |
178 | str = str_make(s); |
179 | str->str_link.str_magic = envstab; |
180 | hstore(envstab->stab_hash,*env,str); |
181 | *--s = '='; |
182 | } |
183 | } |
a559c259 |
184 | sigstab = stabent("SIG",allstabs); |
8d063cd8 |
185 | |
186 | magicalize("!#?^~=-%0123456789.+&*(),\\/[|"); |
187 | |
a559c259 |
188 | (tmpstab = stabent("0",allstabs)) && str_set(STAB_STR(tmpstab),filename); |
189 | (tmpstab = stabent("$",allstabs)) && |
8d063cd8 |
190 | str_numset(STAB_STR(tmpstab),(double)getpid()); |
191 | |
192 | tmpstab = stabent("stdin",TRUE); |
193 | tmpstab->stab_io = stio_new(); |
194 | tmpstab->stab_io->fp = stdin; |
195 | |
196 | tmpstab = stabent("stdout",TRUE); |
197 | tmpstab->stab_io = stio_new(); |
198 | tmpstab->stab_io->fp = stdout; |
199 | defoutstab = tmpstab; |
200 | curoutstab = tmpstab; |
201 | |
202 | tmpstab = stabent("stderr",TRUE); |
203 | tmpstab->stab_io = stio_new(); |
204 | tmpstab->stab_io->fp = stderr; |
a559c259 |
205 | safefree(filename); |
206 | filename = "(eval)"; |
8d063cd8 |
207 | |
208 | setjmp(top_env); /* sets goto_targ on longjump */ |
209 | |
210 | #ifdef DEBUGGING |
211 | if (debug & 1024) |
212 | dump_cmd(main_root,Nullcmd); |
213 | if (debug) |
214 | fprintf(stderr,"\nEXECUTING...\n\n"); |
215 | #endif |
216 | |
217 | /* do it */ |
218 | |
219 | (void) cmd_exec(main_root); |
220 | |
221 | if (goto_targ) |
222 | fatal("Can't find label \"%s\"--aborting.\n",goto_targ); |
223 | exit(0); |
224 | } |
225 | |
226 | magicalize(list) |
227 | register char *list; |
228 | { |
229 | register STAB *stab; |
230 | char sym[2]; |
231 | |
232 | sym[1] = '\0'; |
233 | while (*sym = *list++) { |
a559c259 |
234 | if (stab = stabent(sym,allstabs)) { |
8d063cd8 |
235 | stab->stab_flags = SF_VMAGIC; |
236 | stab->stab_val->str_link.str_magic = stab; |
237 | } |
238 | } |
239 | } |
240 | |
241 | #define RETURN(retval) return (bufptr = s,retval) |
242 | #define OPERATOR(retval) return (expectterm = TRUE,bufptr = s,retval) |
243 | #define TERM(retval) return (expectterm = FALSE,bufptr = s,retval) |
244 | #define LOOPX(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,LOOPEX) |
245 | #define UNI(f) return (yylval.ival = f,expectterm = TRUE,bufptr = s,UNIOP) |
246 | #define FUN0(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC0) |
247 | #define FUN1(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC1) |
248 | #define FUN2(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC2) |
249 | #define FUN3(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,FUNC3) |
250 | #define SFUN(f) return (yylval.ival = f,expectterm = FALSE,bufptr = s,STABFUN) |
251 | |
252 | yylex() |
253 | { |
254 | register char *s = bufptr; |
255 | register char *d; |
256 | register int tmp; |
257 | static bool in_format = FALSE; |
258 | static bool firstline = TRUE; |
259 | |
260 | retry: |
261 | #ifdef YYDEBUG |
262 | if (yydebug) |
263 | if (index(s,'\n')) |
264 | fprintf(stderr,"Tokener at %s",s); |
265 | else |
266 | fprintf(stderr,"Tokener at %s\n",s); |
267 | #endif |
268 | switch (*s) { |
269 | default: |
270 | fprintf(stderr, |
271 | "Unrecognized character %c in file %s line %d--ignoring.\n", |
272 | *s++,filename,line); |
273 | goto retry; |
274 | case 0: |
275 | s = str_get(linestr); |
276 | *s = '\0'; |
277 | if (firstline && (assume_n || assume_p)) { |
278 | firstline = FALSE; |
279 | str_set(linestr,"while (<>) {"); |
280 | s = str_get(linestr); |
281 | goto retry; |
282 | } |
283 | if (!rsfp) |
284 | RETURN(0); |
285 | if (in_format) { |
286 | yylval.formval = load_format(); /* leaves . in buffer */ |
287 | in_format = FALSE; |
288 | s = str_get(linestr); |
289 | TERM(FORMLIST); |
290 | } |
291 | line++; |
292 | if ((s = str_gets(linestr, rsfp)) == Nullch) { |
293 | if (preprocess) |
294 | pclose(rsfp); |
295 | else if (rsfp != stdin) |
296 | fclose(rsfp); |
297 | rsfp = Nullfp; |
298 | if (assume_n || assume_p) { |
299 | str_set(linestr,assume_p ? "}continue{print;" : ""); |
300 | str_cat(linestr,"}"); |
301 | s = str_get(linestr); |
302 | goto retry; |
303 | } |
304 | s = str_get(linestr); |
305 | RETURN(0); |
306 | } |
307 | #ifdef DEBUG |
308 | else if (firstline) { |
309 | char *showinput(); |
310 | s = showinput(); |
311 | } |
312 | #endif |
313 | firstline = FALSE; |
314 | goto retry; |
315 | case ' ': case '\t': |
316 | s++; |
317 | goto retry; |
318 | case '\n': |
319 | case '#': |
320 | if (preprocess && s == str_get(linestr) && |
321 | s[1] == ' ' && isdigit(s[2])) { |
322 | line = atoi(s+2)-1; |
323 | for (s += 2; isdigit(*s); s++) ; |
324 | while (*s && isspace(*s)) s++; |
325 | if (filename) |
326 | safefree(filename); |
327 | s[strlen(s)-1] = '\0'; /* wipe out newline */ |
328 | filename = savestr(s); |
329 | s = str_get(linestr); |
330 | } |
a559c259 |
331 | if (in_eval) { |
332 | while (*s && *s != '\n') |
333 | s++; |
334 | if (*s) |
335 | s++; |
336 | line++; |
337 | } |
338 | else |
339 | *s = '\0'; |
8d063cd8 |
340 | if (lex_newlines) |
341 | RETURN('\n'); |
342 | goto retry; |
343 | case '+': |
344 | case '-': |
345 | if (s[1] == *s) { |
346 | s++; |
347 | if (*s++ == '+') |
348 | RETURN(INC); |
349 | else |
350 | RETURN(DEC); |
351 | } |
352 | /* FALL THROUGH */ |
353 | case '*': |
354 | case '%': |
355 | case '^': |
356 | case '~': |
357 | case '(': |
358 | case ',': |
359 | case ':': |
360 | case ';': |
361 | case '{': |
362 | case '[': |
363 | tmp = *s++; |
364 | OPERATOR(tmp); |
365 | case ')': |
366 | case ']': |
8d063cd8 |
367 | tmp = *s++; |
368 | TERM(tmp); |
a559c259 |
369 | case '}': |
370 | tmp = *s++; |
371 | for (d = s; *d == ' ' || *d == '\t'; d++) ; |
372 | if (*d == '\n' || *d == '#') |
373 | OPERATOR(tmp); /* block end */ |
374 | else |
375 | TERM(tmp); /* associative array end */ |
8d063cd8 |
376 | case '&': |
377 | s++; |
378 | tmp = *s++; |
379 | if (tmp == '&') |
380 | OPERATOR(ANDAND); |
381 | s--; |
382 | OPERATOR('&'); |
383 | case '|': |
384 | s++; |
385 | tmp = *s++; |
386 | if (tmp == '|') |
387 | OPERATOR(OROR); |
388 | s--; |
389 | OPERATOR('|'); |
390 | case '=': |
391 | s++; |
392 | tmp = *s++; |
393 | if (tmp == '=') |
394 | OPERATOR(EQ); |
395 | if (tmp == '~') |
396 | OPERATOR(MATCH); |
397 | s--; |
398 | OPERATOR('='); |
399 | case '!': |
400 | s++; |
401 | tmp = *s++; |
402 | if (tmp == '=') |
403 | OPERATOR(NE); |
404 | if (tmp == '~') |
405 | OPERATOR(NMATCH); |
406 | s--; |
407 | OPERATOR('!'); |
408 | case '<': |
409 | if (expectterm) { |
410 | s = scanstr(s); |
411 | TERM(RSTRING); |
412 | } |
413 | s++; |
414 | tmp = *s++; |
415 | if (tmp == '<') |
416 | OPERATOR(LS); |
417 | if (tmp == '=') |
418 | OPERATOR(LE); |
419 | s--; |
420 | OPERATOR('<'); |
421 | case '>': |
422 | s++; |
423 | tmp = *s++; |
424 | if (tmp == '>') |
425 | OPERATOR(RS); |
426 | if (tmp == '=') |
427 | OPERATOR(GE); |
428 | s--; |
429 | OPERATOR('>'); |
430 | |
431 | #define SNARFWORD \ |
432 | d = tokenbuf; \ |
433 | while (isalpha(*s) || isdigit(*s) || *s == '_') \ |
434 | *d++ = *s++; \ |
435 | *d = '\0'; \ |
436 | d = tokenbuf; |
437 | |
438 | case '$': |
439 | if (s[1] == '#' && (isalpha(s[2]) || s[2] == '_')) { |
440 | s++; |
441 | s = scanreg(s,tokenbuf); |
442 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); |
443 | TERM(ARYLEN); |
444 | } |
445 | s = scanreg(s,tokenbuf); |
446 | yylval.stabval = stabent(tokenbuf,TRUE); |
447 | TERM(REG); |
448 | |
449 | case '@': |
450 | s = scanreg(s,tokenbuf); |
451 | yylval.stabval = aadd(stabent(tokenbuf,TRUE)); |
452 | TERM(ARY); |
453 | |
454 | case '/': /* may either be division or pattern */ |
455 | case '?': /* may either be conditional or pattern */ |
456 | if (expectterm) { |
457 | s = scanpat(s); |
458 | TERM(PATTERN); |
459 | } |
460 | tmp = *s++; |
461 | OPERATOR(tmp); |
462 | |
463 | case '.': |
464 | if (!expectterm || !isdigit(s[1])) { |
465 | s++; |
466 | tmp = *s++; |
467 | if (tmp == '.') |
468 | OPERATOR(DOTDOT); |
469 | s--; |
470 | OPERATOR('.'); |
471 | } |
472 | /* FALL THROUGH */ |
473 | case '0': case '1': case '2': case '3': case '4': |
474 | case '5': case '6': case '7': case '8': case '9': |
475 | case '\'': case '"': case '`': |
476 | s = scanstr(s); |
477 | TERM(RSTRING); |
478 | |
479 | case '_': |
480 | SNARFWORD; |
481 | yylval.cval = savestr(d); |
482 | OPERATOR(WORD); |
483 | case 'a': case 'A': |
484 | SNARFWORD; |
485 | yylval.cval = savestr(d); |
486 | OPERATOR(WORD); |
487 | case 'b': case 'B': |
488 | SNARFWORD; |
489 | yylval.cval = savestr(d); |
490 | OPERATOR(WORD); |
491 | case 'c': case 'C': |
492 | SNARFWORD; |
493 | if (strEQ(d,"continue")) |
494 | OPERATOR(CONTINUE); |
495 | if (strEQ(d,"chdir")) |
496 | UNI(O_CHDIR); |
497 | if (strEQ(d,"close")) |
498 | OPERATOR(CLOSE); |
499 | if (strEQ(d,"crypt")) |
500 | FUN2(O_CRYPT); |
501 | if (strEQ(d,"chop")) |
502 | OPERATOR(CHOP); |
503 | if (strEQ(d,"chmod")) { |
504 | yylval.ival = O_CHMOD; |
505 | OPERATOR(PRINT); |
506 | } |
507 | if (strEQ(d,"chown")) { |
508 | yylval.ival = O_CHOWN; |
509 | OPERATOR(PRINT); |
510 | } |
511 | yylval.cval = savestr(d); |
512 | OPERATOR(WORD); |
513 | case 'd': case 'D': |
514 | SNARFWORD; |
515 | if (strEQ(d,"do")) |
516 | OPERATOR(DO); |
517 | if (strEQ(d,"die")) |
518 | UNI(O_DIE); |
519 | yylval.cval = savestr(d); |
520 | OPERATOR(WORD); |
521 | case 'e': case 'E': |
522 | SNARFWORD; |
523 | if (strEQ(d,"else")) |
524 | OPERATOR(ELSE); |
525 | if (strEQ(d,"elsif")) |
526 | OPERATOR(ELSIF); |
527 | if (strEQ(d,"eq") || strEQ(d,"EQ")) |
528 | OPERATOR(SEQ); |
529 | if (strEQ(d,"exit")) |
530 | UNI(O_EXIT); |
a559c259 |
531 | if (strEQ(d,"eval")) { |
532 | allstabs = TRUE; /* must initialize everything since */ |
533 | UNI(O_EVAL); /* we don't know what will be used */ |
534 | } |
8d063cd8 |
535 | if (strEQ(d,"eof")) |
536 | TERM(FEOF); |
537 | if (strEQ(d,"exp")) |
538 | FUN1(O_EXP); |
539 | if (strEQ(d,"each")) |
540 | SFUN(O_EACH); |
541 | if (strEQ(d,"exec")) { |
542 | yylval.ival = O_EXEC; |
543 | OPERATOR(PRINT); |
544 | } |
545 | yylval.cval = savestr(d); |
546 | OPERATOR(WORD); |
547 | case 'f': case 'F': |
548 | SNARFWORD; |
549 | if (strEQ(d,"for")) |
550 | OPERATOR(FOR); |
551 | if (strEQ(d,"format")) { |
552 | in_format = TRUE; |
553 | OPERATOR(FORMAT); |
554 | } |
555 | if (strEQ(d,"fork")) |
556 | FUN0(O_FORK); |
557 | yylval.cval = savestr(d); |
558 | OPERATOR(WORD); |
559 | case 'g': case 'G': |
560 | SNARFWORD; |
561 | if (strEQ(d,"gt") || strEQ(d,"GT")) |
562 | OPERATOR(SGT); |
563 | if (strEQ(d,"ge") || strEQ(d,"GE")) |
564 | OPERATOR(SGE); |
565 | if (strEQ(d,"goto")) |
566 | LOOPX(O_GOTO); |
567 | if (strEQ(d,"gmtime")) |
568 | FUN1(O_GMTIME); |
569 | yylval.cval = savestr(d); |
570 | OPERATOR(WORD); |
571 | case 'h': case 'H': |
572 | SNARFWORD; |
573 | if (strEQ(d,"hex")) |
574 | FUN1(O_HEX); |
575 | yylval.cval = savestr(d); |
576 | OPERATOR(WORD); |
577 | case 'i': case 'I': |
578 | SNARFWORD; |
579 | if (strEQ(d,"if")) |
580 | OPERATOR(IF); |
581 | if (strEQ(d,"index")) |
582 | FUN2(O_INDEX); |
583 | if (strEQ(d,"int")) |
584 | FUN1(O_INT); |
585 | yylval.cval = savestr(d); |
586 | OPERATOR(WORD); |
587 | case 'j': case 'J': |
588 | SNARFWORD; |
589 | if (strEQ(d,"join")) |
590 | OPERATOR(JOIN); |
591 | yylval.cval = savestr(d); |
592 | OPERATOR(WORD); |
593 | case 'k': case 'K': |
594 | SNARFWORD; |
595 | if (strEQ(d,"keys")) |
596 | SFUN(O_KEYS); |
597 | if (strEQ(d,"kill")) { |
598 | yylval.ival = O_KILL; |
599 | OPERATOR(PRINT); |
600 | } |
601 | yylval.cval = savestr(d); |
602 | OPERATOR(WORD); |
603 | case 'l': case 'L': |
604 | SNARFWORD; |
605 | if (strEQ(d,"last")) |
606 | LOOPX(O_LAST); |
607 | if (strEQ(d,"length")) |
608 | FUN1(O_LENGTH); |
609 | if (strEQ(d,"lt") || strEQ(d,"LT")) |
610 | OPERATOR(SLT); |
611 | if (strEQ(d,"le") || strEQ(d,"LE")) |
612 | OPERATOR(SLE); |
613 | if (strEQ(d,"localtime")) |
614 | FUN1(O_LOCALTIME); |
615 | if (strEQ(d,"log")) |
616 | FUN1(O_LOG); |
617 | if (strEQ(d,"link")) |
618 | FUN2(O_LINK); |
619 | yylval.cval = savestr(d); |
620 | OPERATOR(WORD); |
621 | case 'm': case 'M': |
622 | SNARFWORD; |
623 | if (strEQ(d,"m")) { |
624 | s = scanpat(s-1); |
625 | TERM(PATTERN); |
626 | } |
627 | yylval.cval = savestr(d); |
628 | OPERATOR(WORD); |
629 | case 'n': case 'N': |
630 | SNARFWORD; |
631 | if (strEQ(d,"next")) |
632 | LOOPX(O_NEXT); |
633 | if (strEQ(d,"ne") || strEQ(d,"NE")) |
634 | OPERATOR(SNE); |
635 | yylval.cval = savestr(d); |
636 | OPERATOR(WORD); |
637 | case 'o': case 'O': |
638 | SNARFWORD; |
639 | if (strEQ(d,"open")) |
640 | OPERATOR(OPEN); |
641 | if (strEQ(d,"ord")) |
642 | FUN1(O_ORD); |
643 | if (strEQ(d,"oct")) |
644 | FUN1(O_OCT); |
645 | yylval.cval = savestr(d); |
646 | OPERATOR(WORD); |
647 | case 'p': case 'P': |
648 | SNARFWORD; |
649 | if (strEQ(d,"print")) { |
650 | yylval.ival = O_PRINT; |
651 | OPERATOR(PRINT); |
652 | } |
653 | if (strEQ(d,"printf")) { |
654 | yylval.ival = O_PRTF; |
655 | OPERATOR(PRINT); |
656 | } |
657 | if (strEQ(d,"push")) { |
658 | yylval.ival = O_PUSH; |
659 | OPERATOR(PUSH); |
660 | } |
661 | if (strEQ(d,"pop")) |
662 | OPERATOR(POP); |
663 | yylval.cval = savestr(d); |
664 | OPERATOR(WORD); |
665 | case 'q': case 'Q': |
666 | SNARFWORD; |
667 | yylval.cval = savestr(d); |
668 | OPERATOR(WORD); |
669 | case 'r': case 'R': |
670 | SNARFWORD; |
671 | if (strEQ(d,"reset")) |
672 | UNI(O_RESET); |
673 | if (strEQ(d,"redo")) |
674 | LOOPX(O_REDO); |
675 | if (strEQ(d,"rename")) |
676 | FUN2(O_RENAME); |
677 | yylval.cval = savestr(d); |
678 | OPERATOR(WORD); |
679 | case 's': case 'S': |
680 | SNARFWORD; |
681 | if (strEQ(d,"s")) { |
682 | s = scansubst(s); |
683 | TERM(SUBST); |
684 | } |
685 | if (strEQ(d,"shift")) |
686 | TERM(SHIFT); |
687 | if (strEQ(d,"split")) |
688 | TERM(SPLIT); |
689 | if (strEQ(d,"substr")) |
690 | FUN3(O_SUBSTR); |
691 | if (strEQ(d,"sprintf")) |
692 | OPERATOR(SPRINTF); |
693 | if (strEQ(d,"sub")) |
694 | OPERATOR(SUB); |
695 | if (strEQ(d,"select")) |
696 | OPERATOR(SELECT); |
697 | if (strEQ(d,"seek")) |
698 | OPERATOR(SEEK); |
699 | if (strEQ(d,"stat")) |
700 | OPERATOR(STAT); |
701 | if (strEQ(d,"sqrt")) |
702 | FUN1(O_SQRT); |
703 | if (strEQ(d,"sleep")) |
704 | UNI(O_SLEEP); |
705 | if (strEQ(d,"system")) { |
706 | yylval.ival = O_SYSTEM; |
707 | OPERATOR(PRINT); |
708 | } |
709 | yylval.cval = savestr(d); |
710 | OPERATOR(WORD); |
711 | case 't': case 'T': |
712 | SNARFWORD; |
713 | if (strEQ(d,"tr")) { |
714 | s = scantrans(s); |
715 | TERM(TRANS); |
716 | } |
717 | if (strEQ(d,"tell")) |
718 | TERM(TELL); |
719 | if (strEQ(d,"time")) |
720 | FUN0(O_TIME); |
721 | if (strEQ(d,"times")) |
722 | FUN0(O_TMS); |
723 | yylval.cval = savestr(d); |
724 | OPERATOR(WORD); |
725 | case 'u': case 'U': |
726 | SNARFWORD; |
727 | if (strEQ(d,"using")) |
728 | OPERATOR(USING); |
729 | if (strEQ(d,"until")) |
730 | OPERATOR(UNTIL); |
731 | if (strEQ(d,"unless")) |
732 | OPERATOR(UNLESS); |
733 | if (strEQ(d,"umask")) |
734 | FUN1(O_UMASK); |
735 | if (strEQ(d,"unshift")) { |
736 | yylval.ival = O_UNSHIFT; |
737 | OPERATOR(PUSH); |
738 | } |
739 | if (strEQ(d,"unlink")) { |
740 | yylval.ival = O_UNLINK; |
741 | OPERATOR(PRINT); |
742 | } |
743 | yylval.cval = savestr(d); |
744 | OPERATOR(WORD); |
745 | case 'v': case 'V': |
746 | SNARFWORD; |
747 | if (strEQ(d,"values")) |
748 | SFUN(O_VALUES); |
749 | yylval.cval = savestr(d); |
750 | OPERATOR(WORD); |
751 | case 'w': case 'W': |
752 | SNARFWORD; |
753 | if (strEQ(d,"write")) |
754 | TERM(WRITE); |
755 | if (strEQ(d,"while")) |
756 | OPERATOR(WHILE); |
757 | yylval.cval = savestr(d); |
758 | OPERATOR(WORD); |
759 | case 'x': case 'X': |
760 | SNARFWORD; |
761 | if (!expectterm && strEQ(d,"x")) |
762 | OPERATOR('x'); |
763 | yylval.cval = savestr(d); |
764 | OPERATOR(WORD); |
765 | case 'y': case 'Y': |
766 | SNARFWORD; |
767 | if (strEQ(d,"y")) { |
768 | s = scantrans(s); |
769 | TERM(TRANS); |
770 | } |
771 | yylval.cval = savestr(d); |
772 | OPERATOR(WORD); |
773 | case 'z': case 'Z': |
774 | SNARFWORD; |
775 | yylval.cval = savestr(d); |
776 | OPERATOR(WORD); |
777 | } |
778 | } |
779 | |
780 | STAB * |
781 | stabent(name,add) |
782 | register char *name; |
783 | int add; |
784 | { |
785 | register STAB *stab; |
786 | |
787 | for (stab = stab_index[*name]; stab; stab = stab->stab_next) { |
788 | if (strEQ(name,stab->stab_name)) |
789 | return stab; |
790 | } |
791 | |
792 | /* no entry--should we add one? */ |
793 | |
794 | if (add) { |
795 | stab = (STAB *) safemalloc(sizeof(STAB)); |
796 | bzero((char*)stab, sizeof(STAB)); |
797 | stab->stab_name = savestr(name); |
798 | stab->stab_val = str_new(0); |
799 | stab->stab_next = stab_index[*name]; |
800 | stab_index[*name] = stab; |
801 | return stab; |
802 | } |
803 | return Nullstab; |
804 | } |
805 | |
806 | STIO * |
807 | stio_new() |
808 | { |
809 | STIO *stio = (STIO *) safemalloc(sizeof(STIO)); |
810 | |
811 | bzero((char*)stio, sizeof(STIO)); |
812 | stio->page_len = 60; |
813 | return stio; |
814 | } |
815 | |
816 | char * |
817 | scanreg(s,dest) |
818 | register char *s; |
819 | char *dest; |
820 | { |
821 | register char *d; |
822 | |
823 | s++; |
824 | d = dest; |
825 | while (isalpha(*s) || isdigit(*s) || *s == '_') |
826 | *d++ = *s++; |
827 | *d = '\0'; |
828 | d = dest; |
829 | if (!*d) { |
830 | *d = *s++; |
831 | if (*d == '{') { |
832 | d = dest; |
833 | while (*s && *s != '}') |
834 | *d++ = *s++; |
835 | *d = '\0'; |
836 | d = dest; |
837 | if (*s) |
838 | s++; |
839 | } |
840 | else |
841 | d[1] = '\0'; |
842 | } |
843 | if (*d == '^' && !isspace(*s)) |
844 | *d = *s++ & 31; |
845 | return s; |
846 | } |
847 | |
848 | STR * |
849 | scanconst(string) |
850 | char *string; |
851 | { |
852 | register STR *retstr; |
853 | register char *t; |
854 | register char *d; |
855 | |
856 | if (index(string,'|')) { |
857 | return Nullstr; |
858 | } |
859 | retstr = str_make(string); |
860 | t = str_get(retstr); |
861 | for (d=t; *d; ) { |
862 | switch (*d) { |
863 | case '.': case '[': case '$': case '(': case ')': case '|': |
864 | *d = '\0'; |
865 | break; |
866 | case '\\': |
867 | if (index("wWbB0123456789",d[1])) { |
868 | *d = '\0'; |
869 | break; |
870 | } |
871 | strcpy(d,d+1); |
872 | switch(*d) { |
873 | case 'n': |
874 | *d = '\n'; |
875 | break; |
876 | case 't': |
877 | *d = '\t'; |
878 | break; |
879 | case 'f': |
880 | *d = '\f'; |
881 | break; |
882 | case 'r': |
883 | *d = '\r'; |
884 | break; |
885 | } |
886 | /* FALL THROUGH */ |
887 | default: |
888 | if (d[1] == '*' || d[1] == '+' || d[1] == '?') { |
889 | *d = '\0'; |
890 | break; |
891 | } |
892 | d++; |
893 | } |
894 | } |
895 | if (!*t) { |
896 | str_free(retstr); |
897 | return Nullstr; |
898 | } |
899 | retstr->str_cur = strlen(retstr->str_ptr); /* XXX cheating here */ |
900 | return retstr; |
901 | } |
902 | |
903 | char * |
904 | scanpat(s) |
905 | register char *s; |
906 | { |
907 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
908 | register char *d; |
909 | |
910 | bzero((char *)spat, sizeof(SPAT)); |
911 | spat->spat_next = spat_root; /* link into spat list */ |
912 | spat_root = spat; |
913 | init_compex(&spat->spat_compex); |
914 | |
915 | switch (*s++) { |
916 | case 'm': |
917 | s++; |
918 | break; |
919 | case '/': |
920 | break; |
921 | case '?': |
922 | spat->spat_flags |= SPAT_USE_ONCE; |
923 | break; |
924 | default: |
925 | fatal("Search pattern not found:\n%s",str_get(linestr)); |
926 | } |
927 | s = cpytill(tokenbuf,s,s[-1]); |
928 | if (!*s) |
929 | fatal("Search pattern not terminated:\n%s",str_get(linestr)); |
930 | s++; |
931 | if (*tokenbuf == '^') { |
932 | spat->spat_first = scanconst(tokenbuf+1); |
933 | if (spat->spat_first) { |
934 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
935 | if (spat->spat_flen == strlen(tokenbuf+1)) |
936 | spat->spat_flags |= SPAT_SCANALL; |
937 | } |
938 | } |
939 | else { |
940 | spat->spat_flags |= SPAT_SCANFIRST; |
941 | spat->spat_first = scanconst(tokenbuf); |
942 | if (spat->spat_first) { |
943 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
944 | if (spat->spat_flen == strlen(tokenbuf)) |
945 | spat->spat_flags |= SPAT_SCANALL; |
946 | } |
947 | } |
948 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) |
949 | fatal(d); |
950 | yylval.arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); |
951 | return s; |
952 | } |
953 | |
954 | char * |
955 | scansubst(s) |
956 | register char *s; |
957 | { |
958 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
959 | register char *d; |
960 | |
961 | bzero((char *)spat, sizeof(SPAT)); |
962 | spat->spat_next = spat_root; /* link into spat list */ |
963 | spat_root = spat; |
964 | init_compex(&spat->spat_compex); |
965 | |
966 | s = cpytill(tokenbuf,s+1,*s); |
967 | if (!*s) |
968 | fatal("Substitution pattern not terminated:\n%s",str_get(linestr)); |
969 | for (d=tokenbuf; *d; d++) { |
970 | if (*d == '$' && d[1] && d[-1] != '\\' && d[1] != '|') { |
971 | register ARG *arg; |
972 | |
973 | spat->spat_runtime = arg = op_new(1); |
974 | arg->arg_type = O_ITEM; |
975 | arg[1].arg_type = A_DOUBLE; |
976 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
977 | goto get_repl; /* skip compiling for now */ |
978 | } |
979 | } |
980 | if (*tokenbuf == '^') { |
981 | spat->spat_first = scanconst(tokenbuf+1); |
982 | if (spat->spat_first) |
983 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
984 | } |
985 | else { |
986 | spat->spat_flags |= SPAT_SCANFIRST; |
987 | spat->spat_first = scanconst(tokenbuf); |
988 | if (spat->spat_first) |
989 | spat->spat_flen = strlen(spat->spat_first->str_ptr); |
990 | } |
991 | if (d = compile(&spat->spat_compex,tokenbuf,TRUE,FALSE)) |
992 | fatal(d); |
993 | get_repl: |
994 | s = scanstr(s); |
995 | if (!*s) |
996 | fatal("Substitution replacement not terminated:\n%s",str_get(linestr)); |
997 | spat->spat_repl = yylval.arg; |
998 | if (*s == 'g') { |
999 | s++; |
1000 | spat->spat_flags &= ~SPAT_USE_ONCE; |
1001 | } |
1002 | else |
1003 | spat->spat_flags |= SPAT_USE_ONCE; |
1004 | yylval.arg = make_match(O_SUBST,stab_to_arg(A_STAB,defstab),spat); |
1005 | return s; |
1006 | } |
1007 | |
1008 | ARG * |
1009 | make_split(stab,arg) |
1010 | register STAB *stab; |
1011 | register ARG *arg; |
1012 | { |
1013 | if (arg->arg_type != O_MATCH) { |
1014 | register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT)); |
1015 | register char *d; |
1016 | |
1017 | bzero((char *)spat, sizeof(SPAT)); |
1018 | spat->spat_next = spat_root; /* link into spat list */ |
1019 | spat_root = spat; |
1020 | init_compex(&spat->spat_compex); |
1021 | |
1022 | spat->spat_runtime = arg; |
1023 | arg = make_match(O_MATCH,stab_to_arg(A_STAB,defstab),spat); |
1024 | } |
1025 | arg->arg_type = O_SPLIT; |
1026 | arg[2].arg_ptr.arg_spat->spat_repl = stab_to_arg(A_STAB,aadd(stab)); |
1027 | return arg; |
1028 | } |
1029 | |
1030 | char * |
1031 | expand_charset(s) |
1032 | register char *s; |
1033 | { |
1034 | char t[512]; |
1035 | register char *d = t; |
1036 | register int i; |
1037 | |
1038 | while (*s) { |
1039 | if (s[1] == '-' && s[2]) { |
1040 | for (i = s[0]; i <= s[2]; i++) |
1041 | *d++ = i; |
1042 | s += 3; |
1043 | } |
1044 | else |
1045 | *d++ = *s++; |
1046 | } |
1047 | *d = '\0'; |
1048 | return savestr(t); |
1049 | } |
1050 | |
1051 | char * |
1052 | scantrans(s) |
1053 | register char *s; |
1054 | { |
1055 | ARG *arg = |
1056 | l(make_op(O_TRANS,2,stab_to_arg(A_STAB,defstab),Nullarg,Nullarg,0)); |
1057 | register char *t; |
1058 | register char *r; |
1059 | register char *tbl = safemalloc(256); |
1060 | register int i; |
1061 | |
1062 | arg[2].arg_type = A_NULL; |
1063 | arg[2].arg_ptr.arg_cval = tbl; |
1064 | for (i=0; i<256; i++) |
1065 | tbl[i] = 0; |
1066 | s = scanstr(s); |
1067 | if (!*s) |
1068 | fatal("Translation pattern not terminated:\n%s",str_get(linestr)); |
1069 | t = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); |
1070 | free_arg(yylval.arg); |
1071 | s = scanstr(s-1); |
1072 | if (!*s) |
1073 | fatal("Translation replacement not terminated:\n%s",str_get(linestr)); |
1074 | r = expand_charset(str_get(yylval.arg[1].arg_ptr.arg_str)); |
1075 | free_arg(yylval.arg); |
1076 | yylval.arg = arg; |
1077 | if (!*r) { |
1078 | safefree(r); |
1079 | r = t; |
1080 | } |
1081 | for (i = 0; t[i]; i++) { |
1082 | if (!r[i]) |
1083 | r[i] = r[i-1]; |
1084 | tbl[t[i] & 0377] = r[i]; |
1085 | } |
1086 | if (r != t) |
1087 | safefree(r); |
1088 | safefree(t); |
1089 | return s; |
1090 | } |
1091 | |
1092 | CMD * |
1093 | block_head(tail) |
1094 | register CMD *tail; |
1095 | { |
1096 | if (tail == Nullcmd) { |
1097 | return tail; |
1098 | } |
1099 | return tail->c_head; |
1100 | } |
1101 | |
1102 | CMD * |
1103 | append_line(head,tail) |
1104 | register CMD *head; |
1105 | register CMD *tail; |
1106 | { |
1107 | if (tail == Nullcmd) |
1108 | return head; |
1109 | if (!tail->c_head) /* make sure tail is well formed */ |
1110 | tail->c_head = tail; |
1111 | if (head != Nullcmd) { |
1112 | tail = tail->c_head; /* get to start of tail list */ |
1113 | if (!head->c_head) |
1114 | head->c_head = head; /* start a new head list */ |
1115 | while (head->c_next) { |
1116 | head->c_next->c_head = head->c_head; |
1117 | head = head->c_next; /* get to end of head list */ |
1118 | } |
1119 | head->c_next = tail; /* link to end of old list */ |
1120 | tail->c_head = head->c_head; /* propagate head pointer */ |
1121 | } |
1122 | while (tail->c_next) { |
1123 | tail->c_next->c_head = tail->c_head; |
1124 | tail = tail->c_next; |
1125 | } |
1126 | return tail; |
1127 | } |
1128 | |
1129 | CMD * |
1130 | make_acmd(type,stab,cond,arg) |
1131 | int type; |
1132 | STAB *stab; |
1133 | ARG *cond; |
1134 | ARG *arg; |
1135 | { |
1136 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); |
1137 | |
1138 | bzero((char *)cmd, sizeof(CMD)); |
1139 | cmd->c_type = type; |
1140 | cmd->ucmd.acmd.ac_stab = stab; |
1141 | cmd->ucmd.acmd.ac_expr = arg; |
1142 | cmd->c_expr = cond; |
1143 | if (cond) { |
1144 | opt_arg(cmd,1); |
1145 | cmd->c_flags |= CF_COND; |
1146 | } |
1147 | return cmd; |
1148 | } |
1149 | |
1150 | CMD * |
1151 | make_ccmd(type,arg,cblock) |
1152 | int type; |
1153 | register ARG *arg; |
1154 | struct compcmd cblock; |
1155 | { |
1156 | register CMD *cmd = (CMD *) safemalloc(sizeof (CMD)); |
1157 | |
1158 | bzero((char *)cmd, sizeof(CMD)); |
1159 | cmd->c_type = type; |
1160 | cmd->c_expr = arg; |
1161 | cmd->ucmd.ccmd.cc_true = cblock.comp_true; |
1162 | cmd->ucmd.ccmd.cc_alt = cblock.comp_alt; |
1163 | if (arg) { |
1164 | opt_arg(cmd,1); |
1165 | cmd->c_flags |= CF_COND; |
1166 | } |
1167 | return cmd; |
1168 | } |
1169 | |
1170 | void |
1171 | opt_arg(cmd,fliporflop) |
1172 | register CMD *cmd; |
1173 | int fliporflop; |
1174 | { |
1175 | register ARG *arg; |
1176 | int opt = CFT_EVAL; |
1177 | int sure = 0; |
1178 | ARG *arg2; |
1179 | char *tmps; /* for True macro */ |
1180 | int context = 0; /* 0 = normal, 1 = before &&, 2 = before || */ |
1181 | int flp = fliporflop; |
1182 | |
1183 | if (!cmd) |
1184 | return; |
1185 | arg = cmd->c_expr; |
1186 | |
1187 | /* Turn "if (!expr)" into "unless (expr)" */ |
1188 | |
1189 | while (arg->arg_type == O_NOT && arg[1].arg_type == A_EXPR) { |
1190 | cmd->c_flags ^= CF_INVERT; /* flip sense of cmd */ |
1191 | cmd->c_expr = arg[1].arg_ptr.arg_arg; /* hoist the rest of expr */ |
1192 | free_arg(arg); |
1193 | arg = cmd->c_expr; /* here we go again */ |
1194 | } |
1195 | |
1196 | if (!arg->arg_len) { /* sanity check */ |
1197 | cmd->c_flags |= opt; |
1198 | return; |
1199 | } |
1200 | |
1201 | /* for "cond .. cond" we set up for the initial check */ |
1202 | |
1203 | if (arg->arg_type == O_FLIP) |
1204 | context |= 4; |
1205 | |
1206 | /* for "cond && expr" and "cond || expr" we can ignore expr, sort of */ |
1207 | |
1208 | if (arg->arg_type == O_AND) |
1209 | context |= 1; |
1210 | else if (arg->arg_type == O_OR) |
1211 | context |= 2; |
1212 | if (context && arg[flp].arg_type == A_EXPR) { |
1213 | arg = arg[flp].arg_ptr.arg_arg; |
1214 | flp = 1; |
1215 | } |
1216 | |
1217 | if (arg[flp].arg_flags & (AF_PRE|AF_POST)) { |
1218 | cmd->c_flags |= opt; |
1219 | return; /* side effect, can't optimize */ |
1220 | } |
1221 | |
1222 | if (arg->arg_type == O_ITEM || arg->arg_type == O_FLIP || |
1223 | arg->arg_type == O_AND || arg->arg_type == O_OR) { |
1224 | if (arg[flp].arg_type == A_SINGLE) { |
1225 | opt = (str_true(arg[flp].arg_ptr.arg_str) ? CFT_TRUE : CFT_FALSE); |
1226 | cmd->c_first = arg[flp].arg_ptr.arg_str; |
1227 | goto literal; |
1228 | } |
1229 | else if (arg[flp].arg_type == A_STAB || arg[flp].arg_type == A_LVAL) { |
1230 | cmd->c_stab = arg[flp].arg_ptr.arg_stab; |
1231 | opt = CFT_REG; |
1232 | literal: |
1233 | if (!context) { /* no && or ||? */ |
1234 | free_arg(arg); |
1235 | cmd->c_expr = Nullarg; |
1236 | } |
1237 | if (!(context & 1)) |
1238 | cmd->c_flags |= CF_EQSURE; |
1239 | if (!(context & 2)) |
1240 | cmd->c_flags |= CF_NESURE; |
1241 | } |
1242 | } |
1243 | else if (arg->arg_type == O_MATCH || arg->arg_type == O_SUBST || |
1244 | arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) { |
1245 | if ((arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && |
1246 | arg[2].arg_type == A_SPAT && |
1247 | arg[2].arg_ptr.arg_spat->spat_first ) { |
1248 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
1249 | cmd->c_first = arg[2].arg_ptr.arg_spat->spat_first; |
1250 | cmd->c_flen = arg[2].arg_ptr.arg_spat->spat_flen; |
1251 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANALL && |
1252 | (arg->arg_type == O_MATCH || arg->arg_type == O_NMATCH) ) |
1253 | sure |= CF_EQSURE; /* (SUBST must be forced even */ |
1254 | /* if we know it will work.) */ |
1255 | arg[2].arg_ptr.arg_spat->spat_first = Nullstr; |
1256 | arg[2].arg_ptr.arg_spat->spat_flen = 0; /* only one chk */ |
1257 | sure |= CF_NESURE; /* normally only sure if it fails */ |
1258 | if (arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) |
1259 | cmd->c_flags |= CF_FIRSTNEG; |
1260 | if (context & 1) { /* only sure if thing is false */ |
1261 | if (cmd->c_flags & CF_FIRSTNEG) |
1262 | sure &= ~CF_NESURE; |
1263 | else |
1264 | sure &= ~CF_EQSURE; |
1265 | } |
1266 | else if (context & 2) { /* only sure if thing is true */ |
1267 | if (cmd->c_flags & CF_FIRSTNEG) |
1268 | sure &= ~CF_EQSURE; |
1269 | else |
1270 | sure &= ~CF_NESURE; |
1271 | } |
1272 | if (sure & (CF_EQSURE|CF_NESURE)) { /* if we know anything*/ |
1273 | if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANFIRST) |
1274 | opt = CFT_SCAN; |
1275 | else |
1276 | opt = CFT_ANCHOR; |
1277 | if (sure == (CF_EQSURE|CF_NESURE) /* really sure? */ |
1278 | && arg->arg_type == O_MATCH |
1279 | && context & 4 |
1280 | && fliporflop == 1) { |
1281 | arg[2].arg_type = A_SINGLE; /* don't do twice */ |
1282 | arg[2].arg_ptr.arg_str = &str_yes; |
1283 | } |
1284 | cmd->c_flags |= sure; |
1285 | } |
1286 | } |
1287 | } |
1288 | else if (arg->arg_type == O_SEQ || arg->arg_type == O_SNE || |
1289 | arg->arg_type == O_SLT || arg->arg_type == O_SGT) { |
1290 | if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) { |
1291 | if (arg[2].arg_type == A_SINGLE) { |
1292 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
1293 | cmd->c_first = arg[2].arg_ptr.arg_str; |
1294 | cmd->c_flen = 30000; |
1295 | switch (arg->arg_type) { |
1296 | case O_SLT: case O_SGT: |
1297 | sure |= CF_EQSURE; |
1298 | cmd->c_flags |= CF_FIRSTNEG; |
1299 | break; |
1300 | case O_SNE: |
1301 | cmd->c_flags |= CF_FIRSTNEG; |
1302 | /* FALL THROUGH */ |
1303 | case O_SEQ: |
1304 | sure |= CF_NESURE|CF_EQSURE; |
1305 | break; |
1306 | } |
1307 | if (context & 1) { /* only sure if thing is false */ |
1308 | if (cmd->c_flags & CF_FIRSTNEG) |
1309 | sure &= ~CF_NESURE; |
1310 | else |
1311 | sure &= ~CF_EQSURE; |
1312 | } |
1313 | else if (context & 2) { /* only sure if thing is true */ |
1314 | if (cmd->c_flags & CF_FIRSTNEG) |
1315 | sure &= ~CF_EQSURE; |
1316 | else |
1317 | sure &= ~CF_NESURE; |
1318 | } |
1319 | if (sure & (CF_EQSURE|CF_NESURE)) { |
1320 | opt = CFT_STROP; |
1321 | cmd->c_flags |= sure; |
1322 | } |
1323 | } |
1324 | } |
1325 | } |
1326 | else if (arg->arg_type == O_ASSIGN && |
1327 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) && |
1328 | arg[1].arg_ptr.arg_stab == defstab && |
1329 | arg[2].arg_type == A_EXPR ) { |
1330 | arg2 = arg[2].arg_ptr.arg_arg; |
1331 | if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) { |
1332 | opt = CFT_GETS; |
1333 | cmd->c_stab = arg2[1].arg_ptr.arg_stab; |
1334 | if (!(arg2[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV)) { |
1335 | free_arg(arg2); |
1336 | free_arg(arg); |
1337 | cmd->c_expr = Nullarg; |
1338 | } |
1339 | } |
1340 | } |
1341 | else if (arg->arg_type == O_CHOP && |
1342 | (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) ) { |
1343 | opt = CFT_CHOP; |
1344 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
1345 | free_arg(arg); |
1346 | cmd->c_expr = Nullarg; |
1347 | } |
1348 | if (context & 4) |
1349 | opt |= CF_FLIP; |
1350 | cmd->c_flags |= opt; |
1351 | |
1352 | if (cmd->c_flags & CF_FLIP) { |
1353 | if (fliporflop == 1) { |
1354 | arg = cmd->c_expr; /* get back to O_FLIP arg */ |
1355 | arg[3].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); |
1356 | bcopy((char *)cmd, (char *)arg[3].arg_ptr.arg_cmd, sizeof(CMD)); |
1357 | arg[4].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD)); |
1358 | bcopy((char *)cmd, (char *)arg[4].arg_ptr.arg_cmd, sizeof(CMD)); |
1359 | opt_arg(arg[4].arg_ptr.arg_cmd,2); |
1360 | arg->arg_len = 2; /* this is a lie */ |
1361 | } |
1362 | else { |
1363 | if ((opt & CF_OPTIMIZE) == CFT_EVAL) |
1364 | cmd->c_flags = (cmd->c_flags & ~CF_OPTIMIZE) | CFT_UNFLIP; |
1365 | } |
1366 | } |
1367 | } |
1368 | |
1369 | ARG * |
1370 | mod_match(type,left,pat) |
1371 | register ARG *left; |
1372 | register ARG *pat; |
1373 | { |
1374 | |
1375 | register SPAT *spat; |
1376 | register ARG *newarg; |
1377 | |
1378 | if ((pat->arg_type == O_MATCH || |
1379 | pat->arg_type == O_SUBST || |
1380 | pat->arg_type == O_TRANS || |
1381 | pat->arg_type == O_SPLIT |
1382 | ) && |
1383 | pat[1].arg_ptr.arg_stab == defstab ) { |
1384 | switch (pat->arg_type) { |
1385 | case O_MATCH: |
1386 | newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH, |
1387 | pat->arg_len, |
1388 | left,Nullarg,Nullarg,0); |
1389 | break; |
1390 | case O_SUBST: |
1391 | newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST, |
1392 | pat->arg_len, |
1393 | left,Nullarg,Nullarg,0)); |
1394 | break; |
1395 | case O_TRANS: |
1396 | newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS, |
1397 | pat->arg_len, |
1398 | left,Nullarg,Nullarg,0)); |
1399 | break; |
1400 | case O_SPLIT: |
1401 | newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT, |
1402 | pat->arg_len, |
1403 | left,Nullarg,Nullarg,0); |
1404 | break; |
1405 | } |
1406 | if (pat->arg_len >= 2) { |
1407 | newarg[2].arg_type = pat[2].arg_type; |
1408 | newarg[2].arg_ptr = pat[2].arg_ptr; |
1409 | newarg[2].arg_flags = pat[2].arg_flags; |
1410 | if (pat->arg_len >= 3) { |
1411 | newarg[3].arg_type = pat[3].arg_type; |
1412 | newarg[3].arg_ptr = pat[3].arg_ptr; |
1413 | newarg[3].arg_flags = pat[3].arg_flags; |
1414 | } |
1415 | } |
1416 | safefree((char*)pat); |
1417 | } |
1418 | else { |
1419 | spat = (SPAT *) safemalloc(sizeof (SPAT)); |
1420 | bzero((char *)spat, sizeof(SPAT)); |
1421 | spat->spat_next = spat_root; /* link into spat list */ |
1422 | spat_root = spat; |
1423 | init_compex(&spat->spat_compex); |
1424 | |
1425 | spat->spat_runtime = pat; |
1426 | newarg = make_op(type,2,left,Nullarg,Nullarg,0); |
1427 | newarg[2].arg_type = A_SPAT; |
1428 | newarg[2].arg_ptr.arg_spat = spat; |
1429 | newarg[2].arg_flags = AF_SPECIAL; |
1430 | } |
1431 | |
1432 | return newarg; |
1433 | } |
1434 | |
1435 | CMD * |
1436 | add_label(lbl,cmd) |
1437 | char *lbl; |
1438 | register CMD *cmd; |
1439 | { |
1440 | if (cmd) |
1441 | cmd->c_label = lbl; |
1442 | return cmd; |
1443 | } |
1444 | |
1445 | CMD * |
1446 | addcond(cmd, arg) |
1447 | register CMD *cmd; |
1448 | register ARG *arg; |
1449 | { |
1450 | cmd->c_expr = arg; |
1451 | opt_arg(cmd,1); |
1452 | cmd->c_flags |= CF_COND; |
1453 | return cmd; |
1454 | } |
1455 | |
1456 | CMD * |
1457 | addloop(cmd, arg) |
1458 | register CMD *cmd; |
1459 | register ARG *arg; |
1460 | { |
1461 | cmd->c_expr = arg; |
1462 | opt_arg(cmd,1); |
1463 | cmd->c_flags |= CF_COND|CF_LOOP; |
1464 | if (cmd->c_type == C_BLOCK) |
1465 | cmd->c_flags &= ~CF_COND; |
1466 | else { |
1467 | arg = cmd->ucmd.acmd.ac_expr; |
1468 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_CMD) |
1469 | cmd->c_flags &= ~CF_COND; /* "do {} while" happens at least once */ |
1470 | if (arg && arg->arg_type == O_SUBR) |
1471 | cmd->c_flags &= ~CF_COND; /* likewise for "do subr() while" */ |
1472 | } |
1473 | return cmd; |
1474 | } |
1475 | |
1476 | CMD * |
1477 | invert(cmd) |
1478 | register CMD *cmd; |
1479 | { |
1480 | cmd->c_flags ^= CF_INVERT; |
1481 | return cmd; |
1482 | } |
1483 | |
1484 | yyerror(s) |
1485 | char *s; |
1486 | { |
1487 | char tmpbuf[128]; |
1488 | char *tname = tmpbuf; |
1489 | |
1490 | if (yychar > 256) { |
1491 | tname = tokename[yychar-256]; |
1492 | if (strEQ(tname,"word")) |
1493 | strcpy(tname,tokenbuf); |
1494 | else if (strEQ(tname,"register")) |
1495 | sprintf(tname,"$%s",tokenbuf); |
1496 | else if (strEQ(tname,"array_length")) |
1497 | sprintf(tname,"$#%s",tokenbuf); |
1498 | } |
1499 | else if (!yychar) |
1500 | strcpy(tname,"EOF"); |
1501 | else if (yychar < 32) |
1502 | sprintf(tname,"^%c",yychar+64); |
1503 | else if (yychar == 127) |
1504 | strcpy(tname,"^?"); |
1505 | else |
1506 | sprintf(tname,"%c",yychar); |
a559c259 |
1507 | sprintf(tokenbuf, "%s in file %s at line %d, next token \"%s\"\n", |
8d063cd8 |
1508 | s,filename,line,tname); |
a559c259 |
1509 | if (in_eval) |
1510 | str_set(stabent("@",TRUE)->stab_val,tokenbuf); |
1511 | else |
1512 | fputs(tokenbuf,stderr); |
8d063cd8 |
1513 | } |
1514 | |
1515 | char * |
1516 | scanstr(s) |
1517 | register char *s; |
1518 | { |
1519 | register char term; |
1520 | register char *d; |
1521 | register ARG *arg; |
1522 | register bool makesingle = FALSE; |
1523 | char *leave = "\\$nrtfb0123456789"; /* which backslash sequences to keep */ |
1524 | |
1525 | arg = op_new(1); |
1526 | yylval.arg = arg; |
1527 | arg->arg_type = O_ITEM; |
1528 | |
1529 | switch (*s) { |
1530 | default: /* a substitution replacement */ |
1531 | arg[1].arg_type = A_DOUBLE; |
1532 | makesingle = TRUE; /* maybe disable runtime scanning */ |
1533 | term = *s; |
1534 | if (term == '\'') |
1535 | leave = Nullch; |
1536 | goto snarf_it; |
1537 | case '0': |
1538 | { |
1539 | long i; |
1540 | int shift; |
1541 | |
1542 | arg[1].arg_type = A_SINGLE; |
1543 | if (s[1] == 'x') { |
1544 | shift = 4; |
1545 | s += 2; |
1546 | } |
1547 | else if (s[1] == '.') |
1548 | goto decimal; |
1549 | else |
1550 | shift = 3; |
1551 | i = 0; |
1552 | for (;;) { |
1553 | switch (*s) { |
1554 | default: |
1555 | goto out; |
1556 | case '8': case '9': |
1557 | if (shift != 4) |
1558 | fatal("Illegal octal digit at line %d",line); |
1559 | /* FALL THROUGH */ |
1560 | case '0': case '1': case '2': case '3': case '4': |
1561 | case '5': case '6': case '7': |
1562 | i <<= shift; |
1563 | i += *s++ & 15; |
1564 | break; |
1565 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
1566 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
1567 | if (shift != 4) |
1568 | goto out; |
1569 | i <<= 4; |
1570 | i += (*s++ & 7) + 9; |
1571 | break; |
1572 | } |
1573 | } |
1574 | out: |
1575 | sprintf(tokenbuf,"%d",i); |
1576 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
1577 | } |
1578 | break; |
1579 | case '1': case '2': case '3': case '4': case '5': |
1580 | case '6': case '7': case '8': case '9': case '.': |
1581 | decimal: |
1582 | arg[1].arg_type = A_SINGLE; |
1583 | d = tokenbuf; |
1584 | while (isdigit(*s) || *s == '_') |
1585 | *d++ = *s++; |
1586 | if (*s == '.' && index("0123456789eE",s[1])) |
1587 | *d++ = *s++; |
1588 | while (isdigit(*s) || *s == '_') |
1589 | *d++ = *s++; |
1590 | if (index("eE",*s) && index("+-0123456789",s[1])) |
1591 | *d++ = *s++; |
1592 | if (*s == '+' || *s == '-') |
1593 | *d++ = *s++; |
1594 | while (isdigit(*s)) |
1595 | *d++ = *s++; |
1596 | *d = '\0'; |
1597 | arg[1].arg_ptr.arg_str = str_make(tokenbuf); |
1598 | break; |
1599 | case '\'': |
1600 | arg[1].arg_type = A_SINGLE; |
1601 | term = *s; |
1602 | leave = Nullch; |
1603 | goto snarf_it; |
1604 | |
1605 | case '<': |
1606 | arg[1].arg_type = A_READ; |
1607 | s = cpytill(tokenbuf,s+1,'>'); |
1608 | if (!*tokenbuf) |
1609 | strcpy(tokenbuf,"ARGV"); |
1610 | if (*s) |
1611 | s++; |
1612 | if (rsfp == stdin && strEQ(tokenbuf,"stdin")) |
1613 | fatal("Can't get both program and data from <stdin>\n"); |
1614 | arg[1].arg_ptr.arg_stab = stabent(tokenbuf,TRUE); |
1615 | arg[1].arg_ptr.arg_stab->stab_io = stio_new(); |
1616 | if (strEQ(tokenbuf,"ARGV")) { |
1617 | aadd(arg[1].arg_ptr.arg_stab); |
1618 | arg[1].arg_ptr.arg_stab->stab_io->flags |= IOF_ARGV|IOF_START; |
1619 | } |
1620 | break; |
1621 | case '"': |
1622 | arg[1].arg_type = A_DOUBLE; |
1623 | makesingle = TRUE; /* maybe disable runtime scanning */ |
1624 | term = *s; |
1625 | goto snarf_it; |
1626 | case '`': |
1627 | arg[1].arg_type = A_BACKTICK; |
1628 | term = *s; |
1629 | snarf_it: |
1630 | { |
1631 | STR *tmpstr; |
1632 | int sqstart = line; |
1633 | char *tmps; |
1634 | |
1635 | tmpstr = str_new(strlen(s)); |
1636 | s = str_append_till(tmpstr,s+1,term,leave); |
1637 | while (!*s) { /* multiple line string? */ |
1638 | s = str_gets(linestr, rsfp); |
1639 | if (!*s) |
1640 | fatal("EOF in string at line %d\n",sqstart); |
1641 | line++; |
1642 | s = str_append_till(tmpstr,s,term,leave); |
1643 | } |
1644 | s++; |
1645 | if (term == '\'') { |
1646 | arg[1].arg_ptr.arg_str = tmpstr; |
1647 | break; |
1648 | } |
1649 | tmps = s; |
1650 | s = d = tmpstr->str_ptr; /* assuming shrinkage only */ |
1651 | while (*s) { |
1652 | if (*s == '$' && s[1]) { |
1653 | makesingle = FALSE; /* force interpretation */ |
1654 | if (!isalpha(s[1])) { /* an internal register? */ |
1655 | int len; |
1656 | |
1657 | len = scanreg(s,tokenbuf) - s; |
1658 | stabent(tokenbuf,TRUE); /* make sure it's created */ |
1659 | while (len--) |
1660 | *d++ = *s++; |
1661 | continue; |
1662 | } |
1663 | } |
1664 | else if (*s == '\\' && s[1]) { |
1665 | s++; |
1666 | switch (*s) { |
1667 | default: |
1668 | defchar: |
1669 | if (!leave || index(leave,*s)) |
1670 | *d++ = '\\'; |
1671 | *d++ = *s++; |
1672 | continue; |
1673 | case '0': case '1': case '2': case '3': |
1674 | case '4': case '5': case '6': case '7': |
1675 | *d = *s++ - '0'; |
1676 | if (index("01234567",*s)) { |
1677 | *d <<= 3; |
1678 | *d += *s++ - '0'; |
1679 | } |
135863df |
1680 | else if (!index("`\"",term)) { /* oops, a subpattern */ |
8d063cd8 |
1681 | s--; |
1682 | goto defchar; |
1683 | } |
1684 | if (index("01234567",*s)) { |
1685 | *d <<= 3; |
1686 | *d += *s++ - '0'; |
1687 | } |
1688 | d++; |
1689 | continue; |
1690 | case 'b': |
1691 | *d++ = '\b'; |
1692 | break; |
1693 | case 'n': |
1694 | *d++ = '\n'; |
1695 | break; |
1696 | case 'r': |
1697 | *d++ = '\r'; |
1698 | break; |
1699 | case 'f': |
1700 | *d++ = '\f'; |
1701 | break; |
1702 | case 't': |
1703 | *d++ = '\t'; |
1704 | break; |
1705 | } |
1706 | s++; |
1707 | continue; |
1708 | } |
1709 | *d++ = *s++; |
1710 | } |
1711 | *d = '\0'; |
1712 | if (arg[1].arg_type == A_DOUBLE) { |
1713 | if (makesingle) |
1714 | arg[1].arg_type = A_SINGLE; /* now we can optimize on it */ |
1715 | else |
1716 | leave = "\\"; |
1717 | for (d = s = tmpstr->str_ptr; *s; *d++ = *s++) { |
1718 | if (*s == '\\' && (!leave || index(leave,s[1]))) |
1719 | s++; |
1720 | } |
1721 | *d = '\0'; |
1722 | } |
1723 | tmpstr->str_cur = d - tmpstr->str_ptr; /* XXX cheat */ |
1724 | arg[1].arg_ptr.arg_str = tmpstr; |
1725 | s = tmps; |
1726 | break; |
1727 | } |
1728 | } |
1729 | return s; |
1730 | } |
1731 | |
1732 | ARG * |
1733 | make_op(type,newlen,arg1,arg2,arg3,dolist) |
1734 | int type; |
1735 | int newlen; |
1736 | ARG *arg1; |
1737 | ARG *arg2; |
1738 | ARG *arg3; |
1739 | int dolist; |
1740 | { |
1741 | register ARG *arg; |
1742 | register ARG *chld; |
1743 | register int doarg; |
1744 | |
1745 | arg = op_new(newlen); |
1746 | arg->arg_type = type; |
1747 | doarg = opargs[type]; |
1748 | if (chld = arg1) { |
1749 | if (!(doarg & 1)) |
1750 | arg[1].arg_flags |= AF_SPECIAL; |
1751 | if (doarg & 16) |
1752 | arg[1].arg_flags |= AF_NUMERIC; |
1753 | if (chld->arg_type == O_ITEM && |
1754 | (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL) ) { |
1755 | arg[1].arg_type = chld[1].arg_type; |
1756 | arg[1].arg_ptr = chld[1].arg_ptr; |
1757 | arg[1].arg_flags |= chld[1].arg_flags; |
1758 | free_arg(chld); |
1759 | } |
1760 | else { |
1761 | arg[1].arg_type = A_EXPR; |
1762 | arg[1].arg_ptr.arg_arg = chld; |
1763 | if (dolist & 1) { |
1764 | if (chld->arg_type == O_LIST) { |
1765 | if (newlen == 1) { /* we can hoist entire list */ |
1766 | chld->arg_type = type; |
1767 | free_arg(arg); |
1768 | arg = chld; |
1769 | } |
1770 | else { |
1771 | arg[1].arg_flags |= AF_SPECIAL; |
1772 | } |
1773 | } |
1774 | else if (chld->arg_type == O_ARRAY && chld->arg_len == 1) |
1775 | arg[1].arg_flags |= AF_SPECIAL; |
1776 | } |
1777 | } |
1778 | } |
1779 | if (chld = arg2) { |
1780 | if (!(doarg & 2)) |
1781 | arg[2].arg_flags |= AF_SPECIAL; |
1782 | if (doarg & 32) |
1783 | arg[2].arg_flags |= AF_NUMERIC; |
1784 | if (chld->arg_type == O_ITEM && |
1785 | (hoistable[chld[1].arg_type] || |
1786 | (type == O_ASSIGN && |
1787 | (chld[1].arg_type == A_READ || |
1788 | chld[1].arg_type == A_DOUBLE || |
1789 | chld[1].arg_type == A_BACKTICK ) ) ) ) { |
1790 | arg[2].arg_type = chld[1].arg_type; |
1791 | arg[2].arg_ptr = chld[1].arg_ptr; |
1792 | free_arg(chld); |
1793 | } |
1794 | else { |
1795 | arg[2].arg_type = A_EXPR; |
1796 | arg[2].arg_ptr.arg_arg = chld; |
1797 | if ((dolist & 2) && |
1798 | (chld->arg_type == O_LIST || |
1799 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) |
1800 | arg[2].arg_flags |= AF_SPECIAL; |
1801 | } |
1802 | } |
1803 | if (chld = arg3) { |
1804 | if (!(doarg & 4)) |
1805 | arg[3].arg_flags |= AF_SPECIAL; |
1806 | if (doarg & 64) |
1807 | arg[3].arg_flags |= AF_NUMERIC; |
1808 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) { |
1809 | arg[3].arg_type = chld[1].arg_type; |
1810 | arg[3].arg_ptr = chld[1].arg_ptr; |
1811 | free_arg(chld); |
1812 | } |
1813 | else { |
1814 | arg[3].arg_type = A_EXPR; |
1815 | arg[3].arg_ptr.arg_arg = chld; |
1816 | if ((dolist & 4) && |
1817 | (chld->arg_type == O_LIST || |
1818 | (chld->arg_type == O_ARRAY && chld->arg_len == 1) )) |
1819 | arg[3].arg_flags |= AF_SPECIAL; |
1820 | } |
1821 | } |
1822 | #ifdef DEBUGGING |
1823 | if (debug & 16) { |
1824 | fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]); |
1825 | if (arg1) |
1826 | fprintf(stderr,",%s=%lx", |
1827 | argname[arg[1].arg_type],arg[1].arg_ptr.arg_arg); |
1828 | if (arg2) |
1829 | fprintf(stderr,",%s=%lx", |
1830 | argname[arg[2].arg_type],arg[2].arg_ptr.arg_arg); |
1831 | if (arg3) |
1832 | fprintf(stderr,",%s=%lx", |
1833 | argname[arg[3].arg_type],arg[3].arg_ptr.arg_arg); |
1834 | fprintf(stderr,")\n"); |
1835 | } |
1836 | #endif |
1837 | evalstatic(arg); /* see if we can consolidate anything */ |
1838 | return arg; |
1839 | } |
1840 | |
1841 | /* turn 123 into 123 == $. */ |
1842 | |
1843 | ARG * |
1844 | flipflip(arg) |
1845 | register ARG *arg; |
1846 | { |
1847 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_SINGLE) { |
1848 | arg = (ARG*)saferealloc((char*)arg,3*sizeof(ARG)); |
1849 | arg->arg_type = O_EQ; |
1850 | arg->arg_len = 2; |
1851 | arg[2].arg_type = A_STAB; |
1852 | arg[2].arg_flags = 0; |
1853 | arg[2].arg_ptr.arg_stab = stabent(".",TRUE); |
1854 | } |
1855 | return arg; |
1856 | } |
1857 | |
1858 | void |
1859 | evalstatic(arg) |
1860 | register ARG *arg; |
1861 | { |
1862 | register STR *str; |
1863 | register STR *s1; |
1864 | register STR *s2; |
1865 | double value; /* must not be register */ |
1866 | register char *tmps; |
1867 | int i; |
1868 | double exp(), log(), sqrt(), modf(); |
1869 | char *crypt(); |
1870 | |
1871 | if (!arg || !arg->arg_len) |
1872 | return; |
1873 | |
1874 | if (arg[1].arg_type == A_SINGLE && |
1875 | (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) { |
1876 | str = str_new(0); |
1877 | s1 = arg[1].arg_ptr.arg_str; |
1878 | if (arg->arg_len > 1) |
1879 | s2 = arg[2].arg_ptr.arg_str; |
1880 | else |
1881 | s2 = Nullstr; |
1882 | switch (arg->arg_type) { |
1883 | default: |
1884 | str_free(str); |
1885 | str = Nullstr; /* can't be evaluated yet */ |
1886 | break; |
1887 | case O_CONCAT: |
1888 | str_sset(str,s1); |
1889 | str_scat(str,s2); |
1890 | break; |
1891 | case O_REPEAT: |
1892 | i = (int)str_gnum(s2); |
1893 | while (i--) |
1894 | str_scat(str,s1); |
1895 | break; |
1896 | case O_MULTIPLY: |
1897 | value = str_gnum(s1); |
1898 | str_numset(str,value * str_gnum(s2)); |
1899 | break; |
1900 | case O_DIVIDE: |
1901 | value = str_gnum(s1); |
1902 | str_numset(str,value / str_gnum(s2)); |
1903 | break; |
1904 | case O_MODULO: |
1905 | value = str_gnum(s1); |
1906 | str_numset(str,(double)(((long)value) % ((long)str_gnum(s2)))); |
1907 | break; |
1908 | case O_ADD: |
1909 | value = str_gnum(s1); |
1910 | str_numset(str,value + str_gnum(s2)); |
1911 | break; |
1912 | case O_SUBTRACT: |
1913 | value = str_gnum(s1); |
1914 | str_numset(str,value - str_gnum(s2)); |
1915 | break; |
1916 | case O_LEFT_SHIFT: |
1917 | value = str_gnum(s1); |
1918 | str_numset(str,(double)(((long)value) << ((long)str_gnum(s2)))); |
1919 | break; |
1920 | case O_RIGHT_SHIFT: |
1921 | value = str_gnum(s1); |
1922 | str_numset(str,(double)(((long)value) >> ((long)str_gnum(s2)))); |
1923 | break; |
1924 | case O_LT: |
1925 | value = str_gnum(s1); |
1926 | str_numset(str,(double)(value < str_gnum(s2))); |
1927 | break; |
1928 | case O_GT: |
1929 | value = str_gnum(s1); |
1930 | str_numset(str,(double)(value > str_gnum(s2))); |
1931 | break; |
1932 | case O_LE: |
1933 | value = str_gnum(s1); |
1934 | str_numset(str,(double)(value <= str_gnum(s2))); |
1935 | break; |
1936 | case O_GE: |
1937 | value = str_gnum(s1); |
1938 | str_numset(str,(double)(value >= str_gnum(s2))); |
1939 | break; |
1940 | case O_EQ: |
1941 | value = str_gnum(s1); |
1942 | str_numset(str,(double)(value == str_gnum(s2))); |
1943 | break; |
1944 | case O_NE: |
1945 | value = str_gnum(s1); |
1946 | str_numset(str,(double)(value != str_gnum(s2))); |
1947 | break; |
1948 | case O_BIT_AND: |
1949 | value = str_gnum(s1); |
1950 | str_numset(str,(double)(((long)value) & ((long)str_gnum(s2)))); |
1951 | break; |
1952 | case O_XOR: |
1953 | value = str_gnum(s1); |
1954 | str_numset(str,(double)(((long)value) ^ ((long)str_gnum(s2)))); |
1955 | break; |
1956 | case O_BIT_OR: |
1957 | value = str_gnum(s1); |
1958 | str_numset(str,(double)(((long)value) | ((long)str_gnum(s2)))); |
1959 | break; |
1960 | case O_AND: |
1961 | if (str_true(s1)) |
1962 | str = str_make(str_get(s2)); |
1963 | else |
1964 | str = str_make(str_get(s1)); |
1965 | break; |
1966 | case O_OR: |
1967 | if (str_true(s1)) |
1968 | str = str_make(str_get(s1)); |
1969 | else |
1970 | str = str_make(str_get(s2)); |
1971 | break; |
1972 | case O_COND_EXPR: |
1973 | if (arg[3].arg_type != A_SINGLE) { |
1974 | str_free(str); |
1975 | str = Nullstr; |
1976 | } |
1977 | else { |
1978 | str = str_make(str_get(str_true(s1) ? s2 : arg[3].arg_ptr.arg_str)); |
1979 | str_free(arg[3].arg_ptr.arg_str); |
1980 | } |
1981 | break; |
1982 | case O_NEGATE: |
1983 | str_numset(str,(double)(-str_gnum(s1))); |
1984 | break; |
1985 | case O_NOT: |
1986 | str_numset(str,(double)(!str_true(s1))); |
1987 | break; |
1988 | case O_COMPLEMENT: |
1989 | str_numset(str,(double)(~(long)str_gnum(s1))); |
1990 | break; |
1991 | case O_LENGTH: |
1992 | str_numset(str, (double)str_len(s1)); |
1993 | break; |
1994 | case O_SUBSTR: |
a559c259 |
1995 | if (arg[3].arg_type != A_SINGLE || stabent("[",allstabs)) { |
8d063cd8 |
1996 | str_free(str); /* making the fallacious assumption */ |
1997 | str = Nullstr; /* that any $[ occurs before substr()*/ |
1998 | } |
1999 | else { |
2000 | char *beg; |
2001 | int len = (int)str_gnum(s2); |
2002 | int tmp; |
2003 | |
2004 | for (beg = str_get(s1); *beg && len > 0; beg++,len--) ; |
2005 | len = (int)str_gnum(arg[3].arg_ptr.arg_str); |
2006 | str_free(arg[3].arg_ptr.arg_str); |
2007 | if (len > (tmp = strlen(beg))) |
2008 | len = tmp; |
2009 | str_nset(str,beg,len); |
2010 | } |
2011 | break; |
2012 | case O_SLT: |
2013 | tmps = str_get(s1); |
2014 | str_numset(str,(double)(strLT(tmps,str_get(s2)))); |
2015 | break; |
2016 | case O_SGT: |
2017 | tmps = str_get(s1); |
2018 | str_numset(str,(double)(strGT(tmps,str_get(s2)))); |
2019 | break; |
2020 | case O_SLE: |
2021 | tmps = str_get(s1); |
2022 | str_numset(str,(double)(strLE(tmps,str_get(s2)))); |
2023 | break; |
2024 | case O_SGE: |
2025 | tmps = str_get(s1); |
2026 | str_numset(str,(double)(strGE(tmps,str_get(s2)))); |
2027 | break; |
2028 | case O_SEQ: |
2029 | tmps = str_get(s1); |
2030 | str_numset(str,(double)(strEQ(tmps,str_get(s2)))); |
2031 | break; |
2032 | case O_SNE: |
2033 | tmps = str_get(s1); |
2034 | str_numset(str,(double)(strNE(tmps,str_get(s2)))); |
2035 | break; |
2036 | case O_CRYPT: |
2037 | tmps = str_get(s1); |
2038 | str_set(str,crypt(tmps,str_get(s2))); |
2039 | break; |
2040 | case O_EXP: |
2041 | str_numset(str,exp(str_gnum(s1))); |
2042 | break; |
2043 | case O_LOG: |
2044 | str_numset(str,log(str_gnum(s1))); |
2045 | break; |
2046 | case O_SQRT: |
2047 | str_numset(str,sqrt(str_gnum(s1))); |
2048 | break; |
2049 | case O_INT: |
2050 | modf(str_gnum(s1),&value); |
2051 | str_numset(str,value); |
2052 | break; |
2053 | case O_ORD: |
2054 | str_numset(str,(double)(*str_get(s1))); |
2055 | break; |
2056 | } |
2057 | if (str) { |
2058 | arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */ |
2059 | str_free(s1); |
2060 | str_free(s2); |
2061 | arg[1].arg_ptr.arg_str = str; |
2062 | } |
2063 | } |
2064 | } |
2065 | |
2066 | ARG * |
2067 | l(arg) |
2068 | register ARG *arg; |
2069 | { |
2070 | register int i; |
2071 | register ARG *arg1; |
2072 | |
2073 | arg->arg_flags |= AF_COMMON; /* XXX should cross-match */ |
2074 | |
2075 | /* see if it's an array reference */ |
2076 | |
2077 | if (arg[1].arg_type == A_EXPR) { |
2078 | arg1 = arg[1].arg_ptr.arg_arg; |
2079 | |
2080 | if (arg1->arg_type == O_LIST && arg->arg_type != O_ITEM) { |
2081 | /* assign to list */ |
2082 | arg[1].arg_flags |= AF_SPECIAL; |
2083 | arg[2].arg_flags |= AF_SPECIAL; |
2084 | for (i = arg1->arg_len; i >= 1; i--) { |
2085 | switch (arg1[i].arg_type) { |
2086 | case A_STAB: case A_LVAL: |
2087 | arg1[i].arg_type = A_LVAL; |
2088 | break; |
2089 | case A_EXPR: case A_LEXPR: |
2090 | arg1[i].arg_type = A_LEXPR; |
2091 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_ARRAY) |
2092 | arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY; |
2093 | else if (arg1[i].arg_ptr.arg_arg->arg_type == O_HASH) |
2094 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH; |
2095 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LARRAY) |
2096 | break; |
2097 | if (arg1[i].arg_ptr.arg_arg->arg_type == O_LHASH) |
2098 | break; |
2099 | /* FALL THROUGH */ |
2100 | default: |
2101 | sprintf(tokenbuf, |
2102 | "Illegal item (%s) as lvalue",argname[arg1[i].arg_type]); |
2103 | yyerror(tokenbuf); |
2104 | } |
2105 | } |
2106 | } |
2107 | else if (arg1->arg_type == O_ARRAY) { |
2108 | if (arg1->arg_len == 1 && arg->arg_type != O_ITEM) { |
2109 | /* assign to array */ |
2110 | arg[1].arg_flags |= AF_SPECIAL; |
2111 | arg[2].arg_flags |= AF_SPECIAL; |
2112 | } |
2113 | else |
2114 | arg1->arg_type = O_LARRAY; /* assign to array elem */ |
2115 | } |
2116 | else if (arg1->arg_type == O_HASH) |
2117 | arg1->arg_type = O_LHASH; |
2118 | else { |
2119 | sprintf(tokenbuf, |
2120 | "Illegal expression (%s) as lvalue",opname[arg1->arg_type]); |
2121 | yyerror(tokenbuf); |
2122 | } |
2123 | arg[1].arg_type = A_LEXPR; |
2124 | #ifdef DEBUGGING |
2125 | if (debug & 16) |
2126 | fprintf(stderr,"lval LEXPR\n"); |
2127 | #endif |
2128 | return arg; |
2129 | } |
2130 | |
2131 | /* not an array reference, should be a register name */ |
2132 | |
2133 | if (arg[1].arg_type != A_STAB && arg[1].arg_type != A_LVAL) { |
2134 | sprintf(tokenbuf, |
2135 | "Illegal item (%s) as lvalue",argname[arg[1].arg_type]); |
2136 | yyerror(tokenbuf); |
2137 | } |
2138 | arg[1].arg_type = A_LVAL; |
2139 | #ifdef DEBUGGING |
2140 | if (debug & 16) |
2141 | fprintf(stderr,"lval LVAL\n"); |
2142 | #endif |
2143 | return arg; |
2144 | } |
2145 | |
2146 | ARG * |
2147 | addflags(i,flags,arg) |
2148 | register ARG *arg; |
2149 | { |
2150 | arg[i].arg_flags |= flags; |
2151 | return arg; |
2152 | } |
2153 | |
2154 | ARG * |
2155 | hide_ary(arg) |
2156 | ARG *arg; |
2157 | { |
2158 | if (arg->arg_type == O_ARRAY) |
2159 | return make_op(O_ITEM,1,arg,Nullarg,Nullarg,0); |
2160 | return arg; |
2161 | } |
2162 | |
2163 | ARG * |
2164 | make_list(arg) |
2165 | register ARG *arg; |
2166 | { |
2167 | register int i; |
2168 | register ARG *node; |
2169 | register ARG *nxtnode; |
2170 | register int j; |
2171 | STR *tmpstr; |
2172 | |
2173 | if (!arg) { |
2174 | arg = op_new(0); |
2175 | arg->arg_type = O_LIST; |
2176 | } |
2177 | if (arg->arg_type != O_COMMA) { |
2178 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ |
2179 | return arg; |
2180 | } |
2181 | for (i = 2, node = arg; ; i++) { |
2182 | if (node->arg_len < 2) |
2183 | break; |
2184 | if (node[2].arg_type != A_EXPR) |
2185 | break; |
2186 | node = node[2].arg_ptr.arg_arg; |
2187 | if (node->arg_type != O_COMMA) |
2188 | break; |
2189 | } |
2190 | if (i > 2) { |
2191 | node = arg; |
2192 | arg = op_new(i); |
2193 | tmpstr = arg->arg_ptr.arg_str; |
2194 | *arg = *node; /* copy everything except the STR */ |
2195 | arg->arg_ptr.arg_str = tmpstr; |
2196 | for (j = 1; ; ) { |
2197 | arg[j++] = node[1]; |
2198 | if (j >= i) { |
2199 | arg[j] = node[2]; |
2200 | free_arg(node); |
2201 | break; |
2202 | } |
2203 | nxtnode = node[2].arg_ptr.arg_arg; |
2204 | free_arg(node); |
2205 | node = nxtnode; |
2206 | } |
2207 | } |
2208 | arg->arg_type = O_LIST; |
2209 | arg->arg_len = i; |
2210 | return arg; |
2211 | } |
2212 | |
2213 | /* turn a single item into a list */ |
2214 | |
2215 | ARG * |
2216 | listish(arg) |
2217 | ARG *arg; |
2218 | { |
2219 | if (arg->arg_flags & AF_LISTISH) |
2220 | arg = make_op(O_LIST,1,arg,Nullarg,Nullarg,0); |
2221 | return arg; |
2222 | } |
2223 | |
2224 | ARG * |
2225 | stab_to_arg(atype,stab) |
2226 | int atype; |
2227 | register STAB *stab; |
2228 | { |
2229 | register ARG *arg; |
2230 | |
2231 | arg = op_new(1); |
2232 | arg->arg_type = O_ITEM; |
2233 | arg[1].arg_type = atype; |
2234 | arg[1].arg_ptr.arg_stab = stab; |
2235 | return arg; |
2236 | } |
2237 | |
2238 | ARG * |
2239 | cval_to_arg(cval) |
2240 | register char *cval; |
2241 | { |
2242 | register ARG *arg; |
2243 | |
2244 | arg = op_new(1); |
2245 | arg->arg_type = O_ITEM; |
2246 | arg[1].arg_type = A_SINGLE; |
2247 | arg[1].arg_ptr.arg_str = str_make(cval); |
2248 | safefree(cval); |
2249 | return arg; |
2250 | } |
2251 | |
2252 | ARG * |
2253 | op_new(numargs) |
2254 | int numargs; |
2255 | { |
2256 | register ARG *arg; |
2257 | |
2258 | arg = (ARG*)safemalloc((numargs + 1) * sizeof (ARG)); |
2259 | bzero((char *)arg, (numargs + 1) * sizeof (ARG)); |
2260 | arg->arg_ptr.arg_str = str_new(0); |
2261 | arg->arg_len = numargs; |
2262 | return arg; |
2263 | } |
2264 | |
2265 | void |
2266 | free_arg(arg) |
2267 | ARG *arg; |
2268 | { |
2269 | str_free(arg->arg_ptr.arg_str); |
2270 | safefree((char*)arg); |
2271 | } |
2272 | |
2273 | ARG * |
2274 | make_match(type,expr,spat) |
2275 | int type; |
2276 | ARG *expr; |
2277 | SPAT *spat; |
2278 | { |
2279 | register ARG *arg; |
2280 | |
2281 | arg = make_op(type,2,expr,Nullarg,Nullarg,0); |
2282 | |
2283 | arg[2].arg_type = A_SPAT; |
2284 | arg[2].arg_ptr.arg_spat = spat; |
2285 | #ifdef DEBUGGING |
2286 | if (debug & 16) |
2287 | fprintf(stderr,"make_match SPAT=%lx\n",spat); |
2288 | #endif |
2289 | |
2290 | if (type == O_SUBST || type == O_NSUBST) { |
2291 | if (arg[1].arg_type != A_STAB) |
2292 | yyerror("Illegal lvalue"); |
2293 | arg[1].arg_type = A_LVAL; |
2294 | } |
2295 | return arg; |
2296 | } |
2297 | |
2298 | ARG * |
2299 | cmd_to_arg(cmd) |
2300 | CMD *cmd; |
2301 | { |
2302 | register ARG *arg; |
2303 | |
2304 | arg = op_new(1); |
2305 | arg->arg_type = O_ITEM; |
2306 | arg[1].arg_type = A_CMD; |
2307 | arg[1].arg_ptr.arg_cmd = cmd; |
2308 | return arg; |
2309 | } |
2310 | |
2311 | CMD * |
2312 | wopt(cmd) |
2313 | register CMD *cmd; |
2314 | { |
2315 | register CMD *tail; |
2316 | register ARG *arg = cmd->c_expr; |
2317 | char *tmps; /* used by True macro */ |
2318 | |
2319 | /* hoist "while (<channel>)" up into command block */ |
2320 | |
2321 | if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_READ) { |
2322 | cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */ |
2323 | cmd->c_flags |= CFT_GETS; /* and set it to do the input */ |
2324 | cmd->c_stab = arg[1].arg_ptr.arg_stab; |
2325 | if (arg[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV) { |
2326 | cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$_ =" */ |
2327 | stab_to_arg(A_LVAL,defstab), arg, Nullarg,1 )); |
2328 | } |
2329 | else { |
2330 | free_arg(arg); |
2331 | cmd->c_expr = Nullarg; |
2332 | } |
2333 | } |
2334 | |
2335 | /* First find the end of the true list */ |
2336 | |
2337 | if (cmd->ucmd.ccmd.cc_true == Nullcmd) |
2338 | return cmd; |
2339 | for (tail = cmd->ucmd.ccmd.cc_true; tail->c_next; tail = tail->c_next) ; |
2340 | |
2341 | /* if there's a continue block, link it to true block and find end */ |
2342 | |
2343 | if (cmd->ucmd.ccmd.cc_alt != Nullcmd) { |
2344 | tail->c_next = cmd->ucmd.ccmd.cc_alt; |
2345 | for ( ; tail->c_next; tail = tail->c_next) ; |
2346 | } |
2347 | |
2348 | /* Here's the real trick: link the end of the list back to the beginning, |
2349 | * inserting a "last" block to break out of the loop. This saves one or |
2350 | * two procedure calls every time through the loop, because of how cmd_exec |
2351 | * does tail recursion. |
2352 | */ |
2353 | |
2354 | tail->c_next = (CMD *) safemalloc(sizeof (CMD)); |
2355 | tail = tail->c_next; |
2356 | if (!cmd->ucmd.ccmd.cc_alt) |
2357 | cmd->ucmd.ccmd.cc_alt = tail; /* every loop has a continue now */ |
2358 | |
2359 | bcopy((char *)cmd, (char *)tail, sizeof(CMD)); |
2360 | tail->c_type = C_EXPR; |
2361 | tail->c_flags ^= CF_INVERT; /* turn into "last unless" */ |
2362 | tail->c_next = tail->ucmd.ccmd.cc_true; /* loop directly back to top */ |
2363 | tail->ucmd.acmd.ac_expr = make_op(O_LAST,0,Nullarg,Nullarg,Nullarg,0); |
2364 | tail->ucmd.acmd.ac_stab = Nullstab; |
2365 | return cmd; |
2366 | } |
2367 | |
2368 | FCMD * |
2369 | load_format() |
2370 | { |
2371 | FCMD froot; |
2372 | FCMD *flinebeg; |
2373 | register FCMD *fprev = &froot; |
2374 | register FCMD *fcmd; |
2375 | register char *s; |
2376 | register char *t; |
2377 | register char tmpchar; |
2378 | bool noblank; |
2379 | |
2380 | while ((s = str_gets(linestr,rsfp)) != Nullch) { |
2381 | line++; |
2382 | if (strEQ(s,".\n")) { |
2383 | bufptr = s; |
2384 | return froot.f_next; |
2385 | } |
2386 | if (*s == '#') |
2387 | continue; |
2388 | flinebeg = Nullfcmd; |
2389 | noblank = FALSE; |
2390 | while (*s) { |
2391 | fcmd = (FCMD *)safemalloc(sizeof (FCMD)); |
2392 | bzero((char*)fcmd, sizeof (FCMD)); |
2393 | fprev->f_next = fcmd; |
2394 | fprev = fcmd; |
2395 | for (t=s; *t && *t != '@' && *t != '^'; t++) { |
2396 | if (*t == '~') { |
2397 | noblank = TRUE; |
2398 | *t = ' '; |
2399 | } |
2400 | } |
2401 | tmpchar = *t; |
2402 | *t = '\0'; |
2403 | fcmd->f_pre = savestr(s); |
2404 | fcmd->f_presize = strlen(s); |
2405 | *t = tmpchar; |
2406 | s = t; |
2407 | if (!*s) { |
2408 | if (noblank) |
2409 | fcmd->f_flags |= FC_NOBLANK; |
2410 | break; |
2411 | } |
2412 | if (!flinebeg) |
2413 | flinebeg = fcmd; /* start values here */ |
2414 | if (*s++ == '^') |
2415 | fcmd->f_flags |= FC_CHOP; /* for doing text filling */ |
2416 | switch (*s) { |
2417 | case '*': |
2418 | fcmd->f_type = F_LINES; |
2419 | *s = '\0'; |
2420 | break; |
2421 | case '<': |
2422 | fcmd->f_type = F_LEFT; |
2423 | while (*s == '<') |
2424 | s++; |
2425 | break; |
2426 | case '>': |
2427 | fcmd->f_type = F_RIGHT; |
2428 | while (*s == '>') |
2429 | s++; |
2430 | break; |
2431 | case '|': |
2432 | fcmd->f_type = F_CENTER; |
2433 | while (*s == '|') |
2434 | s++; |
2435 | break; |
2436 | default: |
2437 | fcmd->f_type = F_LEFT; |
2438 | break; |
2439 | } |
2440 | if (fcmd->f_flags & FC_CHOP && *s == '.') { |
2441 | fcmd->f_flags |= FC_MORE; |
2442 | while (*s == '.') |
2443 | s++; |
2444 | } |
2445 | fcmd->f_size = s-t; |
2446 | } |
2447 | if (flinebeg) { |
2448 | again: |
2449 | if ((bufptr = str_gets(linestr ,rsfp)) == Nullch) |
2450 | goto badform; |
2451 | line++; |
2452 | if (strEQ(bufptr,".\n")) { |
2453 | yyerror("Missing values line"); |
2454 | return froot.f_next; |
2455 | } |
2456 | if (*bufptr == '#') |
2457 | goto again; |
2458 | lex_newlines = TRUE; |
2459 | while (flinebeg || *bufptr) { |
2460 | switch(yylex()) { |
2461 | default: |
2462 | yyerror("Bad value in format"); |
2463 | *bufptr = '\0'; |
2464 | break; |
2465 | case '\n': |
2466 | if (flinebeg) |
2467 | yyerror("Missing value in format"); |
2468 | *bufptr = '\0'; |
2469 | break; |
2470 | case REG: |
2471 | yylval.arg = stab_to_arg(A_LVAL,yylval.stabval); |
2472 | /* FALL THROUGH */ |
2473 | case RSTRING: |
2474 | if (!flinebeg) |
2475 | yyerror("Extra value in format"); |
2476 | else { |
2477 | flinebeg->f_expr = yylval.arg; |
2478 | do { |
2479 | flinebeg = flinebeg->f_next; |
2480 | } while (flinebeg && flinebeg->f_size == 0); |
2481 | } |
2482 | break; |
2483 | case ',': case ';': |
2484 | continue; |
2485 | } |
2486 | } |
2487 | lex_newlines = FALSE; |
2488 | } |
2489 | } |
2490 | badform: |
2491 | bufptr = str_get(linestr); |
2492 | yyerror("Format not terminated"); |
2493 | return froot.f_next; |
2494 | } |
a559c259 |
2495 | |
2496 | STR * |
2497 | do_eval(str) |
2498 | STR *str; |
2499 | { |
2500 | int retval; |
2501 | CMD *myroot; |
2502 | |
2503 | in_eval++; |
2504 | str_set(stabent("@",TRUE)->stab_val,""); |
2505 | line = 1; |
2506 | str_sset(linestr,str); |
2507 | bufptr = str_get(linestr); |
2508 | if (setjmp(eval_env)) |
2509 | retval = 1; |
2510 | else |
2511 | retval = yyparse(); |
2512 | myroot = eval_root; /* in case cmd_exec does another eval! */ |
2513 | if (retval) |
2514 | str = &str_no; |
2515 | else { |
2516 | str = cmd_exec(eval_root); |
2517 | cmd_free(myroot); /* can't free on error, for some reason */ |
2518 | } |
2519 | in_eval--; |
2520 | return str; |
2521 | } |
2522 | |
2523 | cmd_free(cmd) |
2524 | register CMD *cmd; |
2525 | { |
2526 | register CMD *tofree; |
2527 | register CMD *head = cmd; |
2528 | |
2529 | while (cmd) { |
2530 | if (cmd->c_label) |
2531 | safefree(cmd->c_label); |
2532 | if (cmd->c_first) |
2533 | str_free(cmd->c_first); |
2534 | if (cmd->c_spat) |
2535 | spat_free(cmd->c_spat); |
2536 | if (cmd->c_expr) |
2537 | arg_free(cmd->c_expr); |
2538 | switch (cmd->c_type) { |
2539 | case C_WHILE: |
2540 | case C_BLOCK: |
2541 | case C_IF: |
2542 | if (cmd->ucmd.ccmd.cc_true) |
2543 | cmd_free(cmd->ucmd.ccmd.cc_true); |
2544 | if (cmd->c_type == C_IF && cmd->ucmd.ccmd.cc_alt) |
2545 | cmd_free(cmd->ucmd.ccmd.cc_alt,Nullcmd); |
2546 | break; |
2547 | case C_EXPR: |
2548 | if (cmd->ucmd.acmd.ac_stab) |
2549 | arg_free(cmd->ucmd.acmd.ac_stab); |
2550 | if (cmd->ucmd.acmd.ac_expr) |
2551 | arg_free(cmd->ucmd.acmd.ac_expr); |
2552 | break; |
2553 | } |
2554 | tofree = cmd; |
2555 | cmd = cmd->c_next; |
2556 | safefree((char*)tofree); |
2557 | if (cmd && cmd == head) /* reached end of while loop */ |
2558 | break; |
2559 | } |
2560 | } |
2561 | |
2562 | arg_free(arg) |
2563 | register ARG *arg; |
2564 | { |
2565 | register int i; |
2566 | |
2567 | for (i = 1; i <= arg->arg_len; i++) { |
2568 | switch (arg[i].arg_type) { |
2569 | case A_NULL: |
2570 | break; |
2571 | case A_LEXPR: |
2572 | case A_EXPR: |
2573 | arg_free(arg[i].arg_ptr.arg_arg); |
2574 | break; |
2575 | case A_CMD: |
2576 | cmd_free(arg[i].arg_ptr.arg_cmd); |
2577 | break; |
2578 | case A_STAB: |
2579 | case A_LVAL: |
2580 | case A_READ: |
2581 | case A_ARYLEN: |
2582 | break; |
2583 | case A_SINGLE: |
2584 | case A_DOUBLE: |
2585 | case A_BACKTICK: |
2586 | str_free(arg[i].arg_ptr.arg_str); |
2587 | break; |
2588 | case A_SPAT: |
2589 | spat_free(arg[i].arg_ptr.arg_spat); |
2590 | break; |
2591 | case A_NUMBER: |
2592 | break; |
2593 | } |
2594 | } |
2595 | free_arg(arg); |
2596 | } |
2597 | |
2598 | spat_free(spat) |
2599 | register SPAT *spat; |
2600 | { |
2601 | register SPAT *sp; |
2602 | |
2603 | if (spat->spat_runtime) |
2604 | arg_free(spat->spat_runtime); |
2605 | if (spat->spat_repl) { |
2606 | arg_free(spat->spat_repl); |
2607 | } |
2608 | free_compex(&spat->spat_compex); |
2609 | |
2610 | /* now unlink from spat list */ |
2611 | if (spat_root == spat) |
2612 | spat_root = spat->spat_next; |
2613 | else { |
2614 | for (sp = spat_root; sp->spat_next != spat; sp = sp->spat_next) ; |
2615 | sp->spat_next = spat->spat_next; |
2616 | } |
2617 | |
2618 | safefree((char*)spat); |
2619 | } |