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988174c1 | 1 | /* $RCSfile: util.c,v $$Revision: 4.0.1.4 $$Date: 91/11/11 16:48:54 $ |
a687059c | 2 | * |
d48672a2 | 3 | * Copyright (c) 1991, Larry Wall |
a687059c | 4 | * |
d48672a2 LW |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. | |
8d063cd8 LW |
7 | * |
8 | * $Log: util.c,v $ | |
988174c1 LW |
9 | * Revision 4.0.1.4 91/11/11 16:48:54 lwall |
10 | * patch19: study was busted by 4.018 | |
11 | * patch19: added little-endian pack/unpack options | |
12 | * | |
de3bb511 LW |
13 | * Revision 4.0.1.3 91/11/05 19:18:26 lwall |
14 | * patch11: safe malloc code now integrated into Perl's malloc when possible | |
15 | * patch11: index("little", "longer string") could visit faraway places | |
16 | * patch11: warn '-' x 10000 dumped core | |
17 | * patch11: forked exec on non-existent program now issues a warning | |
18 | * | |
d48672a2 LW |
19 | * Revision 4.0.1.2 91/06/07 12:10:42 lwall |
20 | * patch4: new copyright notice | |
21 | * patch4: made some allowances for "semi-standard" C | |
22 | * patch4: index() could blow up searching for null string | |
23 | * patch4: taintchecks could improperly modify parent in vfork() | |
24 | * patch4: exec would close files even if you cleared close-on-exec flag | |
25 | * | |
35c8bce7 LW |
26 | * Revision 4.0.1.1 91/04/12 09:19:25 lwall |
27 | * patch1: random cleanup in cpp namespace | |
28 | * | |
fe14fcc3 LW |
29 | * Revision 4.0 91/03/20 01:56:39 lwall |
30 | * 4.0 baseline. | |
8d063cd8 LW |
31 | * |
32 | */ | |
de3bb511 | 33 | /*SUPPRESS 112*/ |
8d063cd8 | 34 | |
8d063cd8 | 35 | #include "EXTERN.h" |
8d063cd8 | 36 | #include "perl.h" |
62b28dd9 | 37 | |
6eb13c3b | 38 | #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) |
a687059c | 39 | #include <signal.h> |
62b28dd9 | 40 | #endif |
a687059c LW |
41 | |
42 | #ifdef I_VFORK | |
43 | # include <vfork.h> | |
44 | #endif | |
45 | ||
46 | #ifdef I_VARARGS | |
47 | # include <varargs.h> | |
48 | #endif | |
8d063cd8 | 49 | |
fe14fcc3 LW |
50 | #ifdef I_FCNTL |
51 | # include <fcntl.h> | |
52 | #endif | |
53 | #ifdef I_SYS_FILE | |
54 | # include <sys/file.h> | |
55 | #endif | |
56 | ||
8d063cd8 | 57 | #define FLUSH |
8d063cd8 | 58 | |
de3bb511 LW |
59 | #ifndef safemalloc |
60 | ||
8d063cd8 LW |
61 | static char nomem[] = "Out of memory!\n"; |
62 | ||
63 | /* paranoid version of malloc */ | |
64 | ||
378cc40b | 65 | #ifdef DEBUGGING |
8d063cd8 | 66 | static int an = 0; |
378cc40b | 67 | #endif |
8d063cd8 | 68 | |
a687059c LW |
69 | /* NOTE: Do not call the next three routines directly. Use the macros |
70 | * in handy.h, so that we can easily redefine everything to do tracking of | |
71 | * allocated hunks back to the original New to track down any memory leaks. | |
72 | */ | |
73 | ||
8d063cd8 LW |
74 | char * |
75 | safemalloc(size) | |
62b28dd9 LW |
76 | #ifdef MSDOS |
77 | unsigned long size; | |
78 | #else | |
8d063cd8 | 79 | MEM_SIZE size; |
62b28dd9 | 80 | #endif /* MSDOS */ |
8d063cd8 LW |
81 | { |
82 | char *ptr; | |
d48672a2 | 83 | #ifndef STANDARD_C |
8d063cd8 | 84 | char *malloc(); |
d48672a2 | 85 | #endif /* ! STANDARD_C */ |
8d063cd8 | 86 | |
62b28dd9 LW |
87 | #ifdef MSDOS |
88 | if (size > 0xffff) { | |
89 | fprintf(stderr, "Allocation too large: %lx\n", size) FLUSH; | |
90 | exit(1); | |
91 | } | |
92 | #endif /* MSDOS */ | |
34de22dd LW |
93 | #ifdef DEBUGGING |
94 | if ((long)size < 0) | |
95 | fatal("panic: malloc"); | |
96 | #endif | |
8d063cd8 LW |
97 | ptr = malloc(size?size:1); /* malloc(0) is NASTY on our system */ |
98 | #ifdef DEBUGGING | |
a687059c | 99 | # ifndef I286 |
8d063cd8 LW |
100 | if (debug & 128) |
101 | fprintf(stderr,"0x%x: (%05d) malloc %d bytes\n",ptr,an++,size); | |
a687059c LW |
102 | # else |
103 | if (debug & 128) | |
104 | fprintf(stderr,"0x%lx: (%05d) malloc %d bytes\n",ptr,an++,size); | |
105 | # endif | |
8d063cd8 LW |
106 | #endif |
107 | if (ptr != Nullch) | |
108 | return ptr; | |
109 | else { | |
34de22dd | 110 | fputs(nomem,stderr) FLUSH; |
8d063cd8 LW |
111 | exit(1); |
112 | } | |
113 | /*NOTREACHED*/ | |
a687059c LW |
114 | #ifdef lint |
115 | return ptr; | |
116 | #endif | |
8d063cd8 LW |
117 | } |
118 | ||
119 | /* paranoid version of realloc */ | |
120 | ||
121 | char * | |
122 | saferealloc(where,size) | |
123 | char *where; | |
62b28dd9 | 124 | #ifndef MSDOS |
8d063cd8 | 125 | MEM_SIZE size; |
62b28dd9 LW |
126 | #else |
127 | unsigned long size; | |
128 | #endif /* MSDOS */ | |
8d063cd8 LW |
129 | { |
130 | char *ptr; | |
d48672a2 | 131 | #ifndef STANDARD_C |
8d063cd8 | 132 | char *realloc(); |
d48672a2 | 133 | #endif /* ! STANDARD_C */ |
8d063cd8 | 134 | |
62b28dd9 LW |
135 | #ifdef MSDOS |
136 | if (size > 0xffff) { | |
137 | fprintf(stderr, "Reallocation too large: %lx\n", size) FLUSH; | |
138 | exit(1); | |
139 | } | |
140 | #endif /* MSDOS */ | |
378cc40b LW |
141 | if (!where) |
142 | fatal("Null realloc"); | |
34de22dd LW |
143 | #ifdef DEBUGGING |
144 | if ((long)size < 0) | |
145 | fatal("panic: realloc"); | |
146 | #endif | |
8d063cd8 LW |
147 | ptr = realloc(where,size?size:1); /* realloc(0) is NASTY on our system */ |
148 | #ifdef DEBUGGING | |
a687059c | 149 | # ifndef I286 |
8d063cd8 LW |
150 | if (debug & 128) { |
151 | fprintf(stderr,"0x%x: (%05d) rfree\n",where,an++); | |
152 | fprintf(stderr,"0x%x: (%05d) realloc %d bytes\n",ptr,an++,size); | |
153 | } | |
a687059c LW |
154 | # else |
155 | if (debug & 128) { | |
156 | fprintf(stderr,"0x%lx: (%05d) rfree\n",where,an++); | |
157 | fprintf(stderr,"0x%lx: (%05d) realloc %d bytes\n",ptr,an++,size); | |
158 | } | |
159 | # endif | |
8d063cd8 LW |
160 | #endif |
161 | if (ptr != Nullch) | |
162 | return ptr; | |
163 | else { | |
34de22dd | 164 | fputs(nomem,stderr) FLUSH; |
8d063cd8 LW |
165 | exit(1); |
166 | } | |
167 | /*NOTREACHED*/ | |
a687059c LW |
168 | #ifdef lint |
169 | return ptr; | |
170 | #endif | |
8d063cd8 LW |
171 | } |
172 | ||
173 | /* safe version of free */ | |
174 | ||
a687059c | 175 | void |
8d063cd8 LW |
176 | safefree(where) |
177 | char *where; | |
178 | { | |
179 | #ifdef DEBUGGING | |
a687059c | 180 | # ifndef I286 |
8d063cd8 LW |
181 | if (debug & 128) |
182 | fprintf(stderr,"0x%x: (%05d) free\n",where,an++); | |
a687059c LW |
183 | # else |
184 | if (debug & 128) | |
185 | fprintf(stderr,"0x%lx: (%05d) free\n",where,an++); | |
186 | # endif | |
8d063cd8 | 187 | #endif |
378cc40b | 188 | if (where) { |
de3bb511 | 189 | /*SUPPRESS 701*/ |
378cc40b LW |
190 | free(where); |
191 | } | |
8d063cd8 LW |
192 | } |
193 | ||
de3bb511 LW |
194 | #endif /* !safemalloc */ |
195 | ||
a687059c LW |
196 | #ifdef LEAKTEST |
197 | ||
198 | #define ALIGN sizeof(long) | |
8d063cd8 LW |
199 | |
200 | char * | |
a687059c LW |
201 | safexmalloc(x,size) |
202 | int x; | |
203 | MEM_SIZE size; | |
8d063cd8 | 204 | { |
a687059c | 205 | register char *where; |
8d063cd8 | 206 | |
a687059c LW |
207 | where = safemalloc(size + ALIGN); |
208 | xcount[x]++; | |
209 | where[0] = x % 100; | |
210 | where[1] = x / 100; | |
211 | return where + ALIGN; | |
8d063cd8 | 212 | } |
8d063cd8 LW |
213 | |
214 | char * | |
a687059c LW |
215 | safexrealloc(where,size) |
216 | char *where; | |
217 | MEM_SIZE size; | |
218 | { | |
219 | return saferealloc(where - ALIGN, size + ALIGN) + ALIGN; | |
220 | } | |
221 | ||
222 | void | |
223 | safexfree(where) | |
224 | char *where; | |
225 | { | |
226 | int x; | |
227 | ||
228 | if (!where) | |
229 | return; | |
230 | where -= ALIGN; | |
231 | x = where[0] + 100 * where[1]; | |
232 | xcount[x]--; | |
233 | safefree(where); | |
234 | } | |
235 | ||
236 | xstat() | |
8d063cd8 | 237 | { |
a687059c | 238 | register int i; |
8d063cd8 | 239 | |
a687059c | 240 | for (i = 0; i < MAXXCOUNT; i++) { |
de3bb511 | 241 | if (xcount[i] > lastxcount[i]) { |
a687059c LW |
242 | fprintf(stderr,"%2d %2d\t%ld\n", i / 100, i % 100, xcount[i]); |
243 | lastxcount[i] = xcount[i]; | |
8d063cd8 LW |
244 | } |
245 | } | |
8d063cd8 | 246 | } |
a687059c LW |
247 | |
248 | #endif /* LEAKTEST */ | |
8d063cd8 LW |
249 | |
250 | /* copy a string up to some (non-backslashed) delimiter, if any */ | |
251 | ||
252 | char * | |
a687059c | 253 | cpytill(to,from,fromend,delim,retlen) |
62b28dd9 LW |
254 | register char *to; |
255 | register char *from; | |
a687059c | 256 | register char *fromend; |
8d063cd8 | 257 | register int delim; |
a687059c | 258 | int *retlen; |
8d063cd8 | 259 | { |
a687059c LW |
260 | char *origto = to; |
261 | ||
262 | for (; from < fromend; from++,to++) { | |
378cc40b LW |
263 | if (*from == '\\') { |
264 | if (from[1] == delim) | |
265 | from++; | |
266 | else if (from[1] == '\\') | |
267 | *to++ = *from++; | |
268 | } | |
8d063cd8 LW |
269 | else if (*from == delim) |
270 | break; | |
271 | *to = *from; | |
272 | } | |
273 | *to = '\0'; | |
a687059c | 274 | *retlen = to - origto; |
8d063cd8 LW |
275 | return from; |
276 | } | |
277 | ||
278 | /* return ptr to little string in big string, NULL if not found */ | |
378cc40b | 279 | /* This routine was donated by Corey Satten. */ |
8d063cd8 LW |
280 | |
281 | char * | |
282 | instr(big, little) | |
378cc40b LW |
283 | register char *big; |
284 | register char *little; | |
285 | { | |
286 | register char *s, *x; | |
a687059c | 287 | register int first; |
378cc40b | 288 | |
a687059c LW |
289 | if (!little) |
290 | return big; | |
291 | first = *little++; | |
378cc40b LW |
292 | if (!first) |
293 | return big; | |
294 | while (*big) { | |
295 | if (*big++ != first) | |
296 | continue; | |
297 | for (x=big,s=little; *s; /**/ ) { | |
298 | if (!*x) | |
299 | return Nullch; | |
300 | if (*s++ != *x++) { | |
301 | s--; | |
302 | break; | |
303 | } | |
304 | } | |
305 | if (!*s) | |
306 | return big-1; | |
307 | } | |
308 | return Nullch; | |
309 | } | |
8d063cd8 | 310 | |
a687059c LW |
311 | /* same as instr but allow embedded nulls */ |
312 | ||
313 | char * | |
314 | ninstr(big, bigend, little, lend) | |
315 | register char *big; | |
316 | register char *bigend; | |
317 | char *little; | |
318 | char *lend; | |
8d063cd8 | 319 | { |
a687059c LW |
320 | register char *s, *x; |
321 | register int first = *little; | |
322 | register char *littleend = lend; | |
378cc40b | 323 | |
a687059c LW |
324 | if (!first && little > littleend) |
325 | return big; | |
de3bb511 LW |
326 | if (bigend - big < littleend - little) |
327 | return Nullch; | |
a687059c LW |
328 | bigend -= littleend - little++; |
329 | while (big <= bigend) { | |
330 | if (*big++ != first) | |
331 | continue; | |
332 | for (x=big,s=little; s < littleend; /**/ ) { | |
333 | if (*s++ != *x++) { | |
334 | s--; | |
335 | break; | |
336 | } | |
337 | } | |
338 | if (s >= littleend) | |
339 | return big-1; | |
378cc40b | 340 | } |
a687059c LW |
341 | return Nullch; |
342 | } | |
343 | ||
344 | /* reverse of the above--find last substring */ | |
345 | ||
346 | char * | |
347 | rninstr(big, bigend, little, lend) | |
348 | register char *big; | |
349 | char *bigend; | |
350 | char *little; | |
351 | char *lend; | |
352 | { | |
353 | register char *bigbeg; | |
354 | register char *s, *x; | |
355 | register int first = *little; | |
356 | register char *littleend = lend; | |
357 | ||
358 | if (!first && little > littleend) | |
359 | return bigend; | |
360 | bigbeg = big; | |
361 | big = bigend - (littleend - little++); | |
362 | while (big >= bigbeg) { | |
363 | if (*big-- != first) | |
364 | continue; | |
365 | for (x=big+2,s=little; s < littleend; /**/ ) { | |
366 | if (*s++ != *x++) { | |
367 | s--; | |
368 | break; | |
369 | } | |
370 | } | |
371 | if (s >= littleend) | |
372 | return big+1; | |
378cc40b | 373 | } |
a687059c | 374 | return Nullch; |
378cc40b | 375 | } |
a687059c LW |
376 | |
377 | unsigned char fold[] = { | |
378 | 0, 1, 2, 3, 4, 5, 6, 7, | |
379 | 8, 9, 10, 11, 12, 13, 14, 15, | |
380 | 16, 17, 18, 19, 20, 21, 22, 23, | |
381 | 24, 25, 26, 27, 28, 29, 30, 31, | |
382 | 32, 33, 34, 35, 36, 37, 38, 39, | |
383 | 40, 41, 42, 43, 44, 45, 46, 47, | |
384 | 48, 49, 50, 51, 52, 53, 54, 55, | |
385 | 56, 57, 58, 59, 60, 61, 62, 63, | |
386 | 64, 'a', 'b', 'c', 'd', 'e', 'f', 'g', | |
387 | 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', | |
388 | 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', | |
389 | 'x', 'y', 'z', 91, 92, 93, 94, 95, | |
390 | 96, 'A', 'B', 'C', 'D', 'E', 'F', 'G', | |
391 | 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', | |
392 | 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', | |
393 | 'X', 'Y', 'Z', 123, 124, 125, 126, 127, | |
394 | 128, 129, 130, 131, 132, 133, 134, 135, | |
395 | 136, 137, 138, 139, 140, 141, 142, 143, | |
396 | 144, 145, 146, 147, 148, 149, 150, 151, | |
397 | 152, 153, 154, 155, 156, 157, 158, 159, | |
398 | 160, 161, 162, 163, 164, 165, 166, 167, | |
399 | 168, 169, 170, 171, 172, 173, 174, 175, | |
400 | 176, 177, 178, 179, 180, 181, 182, 183, | |
401 | 184, 185, 186, 187, 188, 189, 190, 191, | |
402 | 192, 193, 194, 195, 196, 197, 198, 199, | |
403 | 200, 201, 202, 203, 204, 205, 206, 207, | |
404 | 208, 209, 210, 211, 212, 213, 214, 215, | |
405 | 216, 217, 218, 219, 220, 221, 222, 223, | |
406 | 224, 225, 226, 227, 228, 229, 230, 231, | |
407 | 232, 233, 234, 235, 236, 237, 238, 239, | |
408 | 240, 241, 242, 243, 244, 245, 246, 247, | |
409 | 248, 249, 250, 251, 252, 253, 254, 255 | |
410 | }; | |
378cc40b LW |
411 | |
412 | static unsigned char freq[] = { | |
413 | 1, 2, 84, 151, 154, 155, 156, 157, | |
414 | 165, 246, 250, 3, 158, 7, 18, 29, | |
415 | 40, 51, 62, 73, 85, 96, 107, 118, | |
416 | 129, 140, 147, 148, 149, 150, 152, 153, | |
417 | 255, 182, 224, 205, 174, 176, 180, 217, | |
418 | 233, 232, 236, 187, 235, 228, 234, 226, | |
419 | 222, 219, 211, 195, 188, 193, 185, 184, | |
420 | 191, 183, 201, 229, 181, 220, 194, 162, | |
421 | 163, 208, 186, 202, 200, 218, 198, 179, | |
422 | 178, 214, 166, 170, 207, 199, 209, 206, | |
423 | 204, 160, 212, 216, 215, 192, 175, 173, | |
424 | 243, 172, 161, 190, 203, 189, 164, 230, | |
425 | 167, 248, 227, 244, 242, 255, 241, 231, | |
426 | 240, 253, 169, 210, 245, 237, 249, 247, | |
427 | 239, 168, 252, 251, 254, 238, 223, 221, | |
428 | 213, 225, 177, 197, 171, 196, 159, 4, | |
429 | 5, 6, 8, 9, 10, 11, 12, 13, | |
430 | 14, 15, 16, 17, 19, 20, 21, 22, | |
431 | 23, 24, 25, 26, 27, 28, 30, 31, | |
432 | 32, 33, 34, 35, 36, 37, 38, 39, | |
433 | 41, 42, 43, 44, 45, 46, 47, 48, | |
434 | 49, 50, 52, 53, 54, 55, 56, 57, | |
435 | 58, 59, 60, 61, 63, 64, 65, 66, | |
436 | 67, 68, 69, 70, 71, 72, 74, 75, | |
437 | 76, 77, 78, 79, 80, 81, 82, 83, | |
438 | 86, 87, 88, 89, 90, 91, 92, 93, | |
439 | 94, 95, 97, 98, 99, 100, 101, 102, | |
440 | 103, 104, 105, 106, 108, 109, 110, 111, | |
441 | 112, 113, 114, 115, 116, 117, 119, 120, | |
442 | 121, 122, 123, 124, 125, 126, 127, 128, | |
443 | 130, 131, 132, 133, 134, 135, 136, 137, | |
444 | 138, 139, 141, 142, 143, 144, 145, 146 | |
445 | }; | |
8d063cd8 | 446 | |
378cc40b | 447 | void |
a687059c | 448 | fbmcompile(str, iflag) |
378cc40b | 449 | STR *str; |
a687059c | 450 | int iflag; |
378cc40b | 451 | { |
a687059c LW |
452 | register unsigned char *s; |
453 | register unsigned char *table; | |
de3bb511 LW |
454 | register unsigned int i; |
455 | register unsigned int len = str->str_cur; | |
378cc40b | 456 | int rarest = 0; |
20188a90 | 457 | unsigned int frequency = 256; |
378cc40b | 458 | |
62b28dd9 | 459 | Str_Grow(str,len+258); |
a687059c LW |
460 | #ifndef lint |
461 | table = (unsigned char*)(str->str_ptr + len + 1); | |
462 | #else | |
463 | table = Null(unsigned char*); | |
464 | #endif | |
465 | s = table - 2; | |
466 | for (i = 0; i < 256; i++) { | |
378cc40b LW |
467 | table[i] = len; |
468 | } | |
469 | i = 0; | |
a687059c LW |
470 | #ifndef lint |
471 | while (s >= (unsigned char*)(str->str_ptr)) | |
472 | #endif | |
473 | { | |
474 | if (table[*s] == len) { | |
475 | #ifndef pdp11 | |
476 | if (iflag) | |
477 | table[*s] = table[fold[*s]] = i; | |
478 | #else | |
479 | if (iflag) { | |
480 | int j; | |
481 | j = fold[*s]; | |
482 | table[j] = i; | |
483 | table[*s] = i; | |
484 | } | |
485 | #endif /* pdp11 */ | |
486 | else | |
487 | table[*s] = i; | |
488 | } | |
378cc40b LW |
489 | s--,i++; |
490 | } | |
a687059c | 491 | str->str_pok |= SP_FBM; /* deep magic */ |
378cc40b | 492 | |
a687059c LW |
493 | #ifndef lint |
494 | s = (unsigned char*)(str->str_ptr); /* deeper magic */ | |
495 | #else | |
496 | s = Null(unsigned char*); | |
497 | #endif | |
498 | if (iflag) { | |
20188a90 | 499 | register unsigned int tmp, foldtmp; |
a687059c LW |
500 | str->str_pok |= SP_CASEFOLD; |
501 | for (i = 0; i < len; i++) { | |
502 | tmp=freq[s[i]]; | |
503 | foldtmp=freq[fold[s[i]]]; | |
504 | if (tmp < frequency && foldtmp < frequency) { | |
505 | rarest = i; | |
506 | /* choose most frequent among the two */ | |
507 | frequency = (tmp > foldtmp) ? tmp : foldtmp; | |
508 | } | |
509 | } | |
510 | } | |
511 | else { | |
512 | for (i = 0; i < len; i++) { | |
513 | if (freq[s[i]] < frequency) { | |
514 | rarest = i; | |
515 | frequency = freq[s[i]]; | |
516 | } | |
378cc40b LW |
517 | } |
518 | } | |
519 | str->str_rare = s[rarest]; | |
a687059c | 520 | str->str_state = rarest; |
378cc40b LW |
521 | #ifdef DEBUGGING |
522 | if (debug & 512) | |
a687059c | 523 | fprintf(stderr,"rarest char %c at %d\n",str->str_rare, str->str_state); |
378cc40b LW |
524 | #endif |
525 | } | |
526 | ||
378cc40b LW |
527 | char * |
528 | fbminstr(big, bigend, littlestr) | |
a687059c LW |
529 | unsigned char *big; |
530 | register unsigned char *bigend; | |
378cc40b LW |
531 | STR *littlestr; |
532 | { | |
a687059c | 533 | register unsigned char *s; |
378cc40b LW |
534 | register int tmp; |
535 | register int littlelen; | |
a687059c LW |
536 | register unsigned char *little; |
537 | register unsigned char *table; | |
538 | register unsigned char *olds; | |
539 | register unsigned char *oldlittle; | |
378cc40b | 540 | |
a687059c | 541 | #ifndef lint |
d48672a2 LW |
542 | if (!(littlestr->str_pok & SP_FBM)) { |
543 | if (!littlestr->str_ptr) | |
544 | return (char*)big; | |
9f68db38 LW |
545 | return ninstr((char*)big,(char*)bigend, |
546 | littlestr->str_ptr, littlestr->str_ptr + littlestr->str_cur); | |
d48672a2 | 547 | } |
a687059c | 548 | #endif |
378cc40b LW |
549 | |
550 | littlelen = littlestr->str_cur; | |
a687059c LW |
551 | #ifndef lint |
552 | if (littlestr->str_pok & SP_TAIL && !multiline) { /* tail anchored? */ | |
0f85fab0 LW |
553 | if (littlelen > bigend - big) |
554 | return Nullch; | |
a687059c LW |
555 | little = (unsigned char*)littlestr->str_ptr; |
556 | if (littlestr->str_pok & SP_CASEFOLD) { /* oops, fake it */ | |
557 | big = bigend - littlelen; /* just start near end */ | |
558 | if (bigend[-1] == '\n' && little[littlelen-1] != '\n') | |
559 | big--; | |
378cc40b LW |
560 | } |
561 | else { | |
a687059c LW |
562 | s = bigend - littlelen; |
563 | if (*s == *little && bcmp(s,little,littlelen)==0) | |
564 | return (char*)s; /* how sweet it is */ | |
34de22dd LW |
565 | else if (bigend[-1] == '\n' && little[littlelen-1] != '\n' |
566 | && s > big) { | |
a687059c LW |
567 | s--; |
568 | if (*s == *little && bcmp(s,little,littlelen)==0) | |
569 | return (char*)s; | |
570 | } | |
571 | return Nullch; | |
572 | } | |
573 | } | |
574 | table = (unsigned char*)(littlestr->str_ptr + littlelen + 1); | |
575 | #else | |
576 | table = Null(unsigned char*); | |
577 | #endif | |
62b28dd9 LW |
578 | if (--littlelen >= bigend - big) |
579 | return Nullch; | |
580 | s = big + littlelen; | |
a687059c LW |
581 | oldlittle = little = table - 2; |
582 | if (littlestr->str_pok & SP_CASEFOLD) { /* case insensitive? */ | |
20188a90 | 583 | if (s < bigend) { |
a687059c | 584 | top1: |
de3bb511 | 585 | /*SUPPRESS 560*/ |
a687059c | 586 | if (tmp = table[*s]) { |
62b28dd9 LW |
587 | #ifdef POINTERRIGOR |
588 | if (bigend - s > tmp) { | |
589 | s += tmp; | |
590 | goto top1; | |
591 | } | |
592 | #else | |
593 | if ((s += tmp) < bigend) | |
594 | goto top1; | |
595 | #endif | |
596 | return Nullch; | |
a687059c LW |
597 | } |
598 | else { | |
599 | tmp = littlelen; /* less expensive than calling strncmp() */ | |
600 | olds = s; | |
601 | while (tmp--) { | |
602 | if (*--s == *--little || fold[*s] == *little) | |
603 | continue; | |
604 | s = olds + 1; /* here we pay the price for failure */ | |
605 | little = oldlittle; | |
606 | if (s < bigend) /* fake up continue to outer loop */ | |
607 | goto top1; | |
608 | return Nullch; | |
609 | } | |
610 | #ifndef lint | |
611 | return (char *)s; | |
612 | #endif | |
613 | } | |
614 | } | |
615 | } | |
616 | else { | |
20188a90 | 617 | if (s < bigend) { |
a687059c | 618 | top2: |
de3bb511 | 619 | /*SUPPRESS 560*/ |
a687059c | 620 | if (tmp = table[*s]) { |
62b28dd9 LW |
621 | #ifdef POINTERRIGOR |
622 | if (bigend - s > tmp) { | |
623 | s += tmp; | |
624 | goto top2; | |
625 | } | |
626 | #else | |
627 | if ((s += tmp) < bigend) | |
628 | goto top2; | |
629 | #endif | |
630 | return Nullch; | |
a687059c LW |
631 | } |
632 | else { | |
633 | tmp = littlelen; /* less expensive than calling strncmp() */ | |
634 | olds = s; | |
635 | while (tmp--) { | |
636 | if (*--s == *--little) | |
637 | continue; | |
638 | s = olds + 1; /* here we pay the price for failure */ | |
639 | little = oldlittle; | |
640 | if (s < bigend) /* fake up continue to outer loop */ | |
641 | goto top2; | |
642 | return Nullch; | |
643 | } | |
644 | #ifndef lint | |
645 | return (char *)s; | |
646 | #endif | |
378cc40b | 647 | } |
378cc40b LW |
648 | } |
649 | } | |
650 | return Nullch; | |
651 | } | |
652 | ||
653 | char * | |
654 | screaminstr(bigstr, littlestr) | |
655 | STR *bigstr; | |
656 | STR *littlestr; | |
657 | { | |
a687059c LW |
658 | register unsigned char *s, *x; |
659 | register unsigned char *big; | |
378cc40b LW |
660 | register int pos; |
661 | register int previous; | |
662 | register int first; | |
a687059c LW |
663 | register unsigned char *little; |
664 | register unsigned char *bigend; | |
665 | register unsigned char *littleend; | |
378cc40b LW |
666 | |
667 | if ((pos = screamfirst[littlestr->str_rare]) < 0) | |
668 | return Nullch; | |
a687059c LW |
669 | #ifndef lint |
670 | little = (unsigned char *)(littlestr->str_ptr); | |
671 | #else | |
672 | little = Null(unsigned char *); | |
673 | #endif | |
674 | littleend = little + littlestr->str_cur; | |
378cc40b | 675 | first = *little++; |
a687059c LW |
676 | previous = littlestr->str_state; |
677 | #ifndef lint | |
678 | big = (unsigned char *)(bigstr->str_ptr); | |
679 | #else | |
680 | big = Null(unsigned char*); | |
681 | #endif | |
682 | bigend = big + bigstr->str_cur; | |
378cc40b | 683 | while (pos < previous) { |
a687059c | 684 | #ifndef lint |
378cc40b | 685 | if (!(pos += screamnext[pos])) |
a687059c | 686 | #endif |
378cc40b LW |
687 | return Nullch; |
688 | } | |
de3bb511 | 689 | #ifdef POINTERRIGOR |
a687059c LW |
690 | if (littlestr->str_pok & SP_CASEFOLD) { /* case insignificant? */ |
691 | do { | |
988174c1 LW |
692 | if (big[pos-previous] != first && big[pos-previous] != fold[first]) |
693 | continue; | |
de3bb511 LW |
694 | for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) { |
695 | if (x >= bigend) | |
696 | return Nullch; | |
697 | if (*s++ != *x++ && fold[*(s-1)] != *(x-1)) { | |
698 | s--; | |
699 | break; | |
700 | } | |
701 | } | |
702 | if (s == littleend) | |
703 | #ifndef lint | |
704 | return (char *)(big+pos-previous); | |
705 | #else | |
706 | return Nullch; | |
707 | #endif | |
708 | } while ( | |
709 | #ifndef lint | |
710 | pos += screamnext[pos] /* does this goof up anywhere? */ | |
711 | #else | |
712 | pos += screamnext[0] | |
713 | #endif | |
714 | ); | |
715 | } | |
716 | else { | |
717 | do { | |
988174c1 LW |
718 | if (big[pos-previous] != first) |
719 | continue; | |
de3bb511 LW |
720 | for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) { |
721 | if (x >= bigend) | |
722 | return Nullch; | |
723 | if (*s++ != *x++) { | |
724 | s--; | |
725 | break; | |
726 | } | |
727 | } | |
728 | if (s == littleend) | |
729 | #ifndef lint | |
730 | return (char *)(big+pos-previous); | |
731 | #else | |
732 | return Nullch; | |
733 | #endif | |
734 | } while ( | |
735 | #ifndef lint | |
736 | pos += screamnext[pos] | |
737 | #else | |
738 | pos += screamnext[0] | |
739 | #endif | |
740 | ); | |
741 | } | |
742 | #else /* !POINTERRIGOR */ | |
743 | big -= previous; | |
744 | if (littlestr->str_pok & SP_CASEFOLD) { /* case insignificant? */ | |
745 | do { | |
988174c1 LW |
746 | if (big[pos] != first && big[pos] != fold[first]) |
747 | continue; | |
a687059c LW |
748 | for (x=big+pos+1,s=little; s < littleend; /**/ ) { |
749 | if (x >= bigend) | |
750 | return Nullch; | |
751 | if (*s++ != *x++ && fold[*(s-1)] != *(x-1)) { | |
752 | s--; | |
753 | break; | |
754 | } | |
755 | } | |
756 | if (s == littleend) | |
757 | #ifndef lint | |
758 | return (char *)(big+pos); | |
759 | #else | |
8d063cd8 | 760 | return Nullch; |
a687059c LW |
761 | #endif |
762 | } while ( | |
763 | #ifndef lint | |
764 | pos += screamnext[pos] /* does this goof up anywhere? */ | |
765 | #else | |
766 | pos += screamnext[0] | |
767 | #endif | |
768 | ); | |
769 | } | |
770 | else { | |
771 | do { | |
988174c1 LW |
772 | if (big[pos] != first) |
773 | continue; | |
a687059c LW |
774 | for (x=big+pos+1,s=little; s < littleend; /**/ ) { |
775 | if (x >= bigend) | |
776 | return Nullch; | |
777 | if (*s++ != *x++) { | |
778 | s--; | |
779 | break; | |
780 | } | |
378cc40b | 781 | } |
a687059c LW |
782 | if (s == littleend) |
783 | #ifndef lint | |
784 | return (char *)(big+pos); | |
785 | #else | |
786 | return Nullch; | |
787 | #endif | |
788 | } while ( | |
789 | #ifndef lint | |
790 | pos += screamnext[pos] | |
791 | #else | |
792 | pos += screamnext[0] | |
793 | #endif | |
794 | ); | |
795 | } | |
de3bb511 | 796 | #endif /* POINTERRIGOR */ |
8d063cd8 LW |
797 | return Nullch; |
798 | } | |
799 | ||
800 | /* copy a string to a safe spot */ | |
801 | ||
802 | char * | |
803 | savestr(str) | |
804 | char *str; | |
805 | { | |
a687059c | 806 | register char *newaddr; |
8d063cd8 | 807 | |
a687059c | 808 | New(902,newaddr,strlen(str)+1,char); |
8d063cd8 LW |
809 | (void)strcpy(newaddr,str); |
810 | return newaddr; | |
811 | } | |
812 | ||
a687059c LW |
813 | /* same thing but with a known length */ |
814 | ||
815 | char * | |
816 | nsavestr(str, len) | |
817 | char *str; | |
818 | register int len; | |
819 | { | |
820 | register char *newaddr; | |
821 | ||
822 | New(903,newaddr,len+1,char); | |
823 | (void)bcopy(str,newaddr,len); /* might not be null terminated */ | |
824 | newaddr[len] = '\0'; /* is now */ | |
825 | return newaddr; | |
826 | } | |
827 | ||
8d063cd8 LW |
828 | /* grow a static string to at least a certain length */ |
829 | ||
830 | void | |
831 | growstr(strptr,curlen,newlen) | |
832 | char **strptr; | |
833 | int *curlen; | |
834 | int newlen; | |
835 | { | |
836 | if (newlen > *curlen) { /* need more room? */ | |
837 | if (*curlen) | |
a687059c | 838 | Renew(*strptr,newlen,char); |
8d063cd8 | 839 | else |
a687059c | 840 | New(905,*strptr,newlen,char); |
8d063cd8 LW |
841 | *curlen = newlen; |
842 | } | |
843 | } | |
844 | ||
35c8bce7 | 845 | #ifndef I_VARARGS |
378cc40b LW |
846 | /*VARARGS1*/ |
847 | mess(pat,a1,a2,a3,a4) | |
848 | char *pat; | |
a687059c | 849 | long a1, a2, a3, a4; |
378cc40b LW |
850 | { |
851 | char *s; | |
de3bb511 LW |
852 | int usermess = strEQ(pat,"%s"); |
853 | STR *tmpstr; | |
378cc40b | 854 | |
a687059c | 855 | s = buf; |
de3bb511 LW |
856 | if (usermess) { |
857 | tmpstr = str_mortal(&str_undef); | |
858 | str_set(tmpstr, (char*)a1); | |
859 | *s++ = tmpstr->str_ptr[tmpstr->str_cur-1]; | |
860 | } | |
861 | else { | |
862 | (void)sprintf(s,pat,a1,a2,a3,a4); | |
863 | s += strlen(s); | |
864 | } | |
865 | ||
378cc40b | 866 | if (s[-1] != '\n') { |
62b28dd9 | 867 | if (curcmd->c_line) { |
20188a90 LW |
868 | (void)sprintf(s," at %s line %ld", |
869 | stab_val(curcmd->c_filestab)->str_ptr, (long)curcmd->c_line); | |
378cc40b LW |
870 | s += strlen(s); |
871 | } | |
872 | if (last_in_stab && | |
a687059c LW |
873 | stab_io(last_in_stab) && |
874 | stab_io(last_in_stab)->lines ) { | |
875 | (void)sprintf(s,", <%s> line %ld", | |
876 | last_in_stab == argvstab ? "" : stab_name(last_in_stab), | |
877 | (long)stab_io(last_in_stab)->lines); | |
378cc40b LW |
878 | s += strlen(s); |
879 | } | |
a687059c | 880 | (void)strcpy(s,".\n"); |
de3bb511 LW |
881 | if (usermess) |
882 | str_cat(tmpstr,buf+1); | |
378cc40b | 883 | } |
de3bb511 LW |
884 | if (usermess) |
885 | return tmpstr->str_ptr; | |
886 | else | |
887 | return buf; | |
378cc40b LW |
888 | } |
889 | ||
8d063cd8 LW |
890 | /*VARARGS1*/ |
891 | fatal(pat,a1,a2,a3,a4) | |
892 | char *pat; | |
a687059c | 893 | long a1, a2, a3, a4; |
8d063cd8 LW |
894 | { |
895 | extern FILE *e_fp; | |
896 | extern char *e_tmpname; | |
9f68db38 | 897 | char *tmps; |
de3bb511 | 898 | char *message; |
8d063cd8 | 899 | |
de3bb511 | 900 | message = mess(pat,a1,a2,a3,a4); |
a559c259 | 901 | if (in_eval) { |
de3bb511 | 902 | str_set(stab_val(stabent("@",TRUE)),message); |
9f68db38 LW |
903 | tmps = "_EVAL_"; |
904 | while (loop_ptr >= 0 && (!loop_stack[loop_ptr].loop_label || | |
905 | strNE(tmps,loop_stack[loop_ptr].loop_label) )) { | |
906 | #ifdef DEBUGGING | |
907 | if (debug & 4) { | |
908 | deb("(Skipping label #%d %s)\n",loop_ptr, | |
909 | loop_stack[loop_ptr].loop_label); | |
910 | } | |
911 | #endif | |
912 | loop_ptr--; | |
913 | } | |
914 | #ifdef DEBUGGING | |
915 | if (debug & 4) { | |
916 | deb("(Found label #%d %s)\n",loop_ptr, | |
917 | loop_stack[loop_ptr].loop_label); | |
918 | } | |
919 | #endif | |
920 | if (loop_ptr < 0) { | |
921 | in_eval = 0; | |
922 | fatal("Bad label: %s", tmps); | |
923 | } | |
924 | longjmp(loop_stack[loop_ptr].loop_env, 1); | |
a559c259 | 925 | } |
de3bb511 | 926 | fputs(message,stderr); |
a687059c | 927 | (void)fflush(stderr); |
8d063cd8 | 928 | if (e_fp) |
a687059c | 929 | (void)UNLINK(e_tmpname); |
378cc40b | 930 | statusvalue >>= 8; |
27e2fb84 | 931 | exit((int)((errno&255)?errno:((statusvalue&255)?statusvalue:255))); |
378cc40b LW |
932 | } |
933 | ||
934 | /*VARARGS1*/ | |
935 | warn(pat,a1,a2,a3,a4) | |
936 | char *pat; | |
a687059c | 937 | long a1, a2, a3, a4; |
378cc40b | 938 | { |
de3bb511 LW |
939 | char *message; |
940 | ||
941 | message = mess(pat,a1,a2,a3,a4); | |
942 | fputs(message,stderr); | |
a687059c LW |
943 | #ifdef LEAKTEST |
944 | #ifdef DEBUGGING | |
945 | if (debug & 4096) | |
946 | xstat(); | |
947 | #endif | |
948 | #endif | |
949 | (void)fflush(stderr); | |
8d063cd8 | 950 | } |
a687059c LW |
951 | #else |
952 | /*VARARGS0*/ | |
de3bb511 | 953 | char * |
a687059c LW |
954 | mess(args) |
955 | va_list args; | |
956 | { | |
957 | char *pat; | |
958 | char *s; | |
de3bb511 LW |
959 | STR *tmpstr; |
960 | int usermess; | |
d48672a2 | 961 | #ifndef HAS_VPRINTF |
a687059c LW |
962 | #ifdef CHARVSPRINTF |
963 | char *vsprintf(); | |
964 | #else | |
965 | int vsprintf(); | |
966 | #endif | |
d48672a2 | 967 | #endif |
a687059c | 968 | |
a687059c LW |
969 | #ifdef lint |
970 | pat = Nullch; | |
971 | #else | |
972 | pat = va_arg(args, char *); | |
973 | #endif | |
de3bb511 LW |
974 | s = buf; |
975 | usermess = strEQ(pat, "%s"); | |
976 | if (usermess) { | |
977 | tmpstr = str_mortal(&str_undef); | |
978 | str_set(tmpstr, va_arg(args, char *)); | |
979 | *s++ = tmpstr->str_ptr[tmpstr->str_cur-1]; | |
980 | } | |
981 | else { | |
982 | (void) vsprintf(s,pat,args); | |
983 | s += strlen(s); | |
984 | } | |
a687059c | 985 | |
a687059c | 986 | if (s[-1] != '\n') { |
62b28dd9 | 987 | if (curcmd->c_line) { |
20188a90 LW |
988 | (void)sprintf(s," at %s line %ld", |
989 | stab_val(curcmd->c_filestab)->str_ptr, (long)curcmd->c_line); | |
a687059c LW |
990 | s += strlen(s); |
991 | } | |
992 | if (last_in_stab && | |
993 | stab_io(last_in_stab) && | |
994 | stab_io(last_in_stab)->lines ) { | |
995 | (void)sprintf(s,", <%s> line %ld", | |
996 | last_in_stab == argvstab ? "" : last_in_stab->str_magic->str_ptr, | |
997 | (long)stab_io(last_in_stab)->lines); | |
998 | s += strlen(s); | |
999 | } | |
1000 | (void)strcpy(s,".\n"); | |
de3bb511 LW |
1001 | if (usermess) |
1002 | str_cat(tmpstr,buf+1); | |
a687059c | 1003 | } |
de3bb511 LW |
1004 | |
1005 | if (usermess) | |
1006 | return tmpstr->str_ptr; | |
1007 | else | |
1008 | return buf; | |
a687059c LW |
1009 | } |
1010 | ||
1011 | /*VARARGS0*/ | |
1012 | fatal(va_alist) | |
1013 | va_dcl | |
1014 | { | |
1015 | va_list args; | |
1016 | extern FILE *e_fp; | |
1017 | extern char *e_tmpname; | |
9f68db38 | 1018 | char *tmps; |
de3bb511 | 1019 | char *message; |
a687059c LW |
1020 | |
1021 | #ifndef lint | |
1022 | va_start(args); | |
1023 | #else | |
1024 | args = 0; | |
1025 | #endif | |
de3bb511 | 1026 | message = mess(args); |
a687059c LW |
1027 | va_end(args); |
1028 | if (in_eval) { | |
de3bb511 | 1029 | str_set(stab_val(stabent("@",TRUE)),message); |
9f68db38 LW |
1030 | tmps = "_EVAL_"; |
1031 | while (loop_ptr >= 0 && (!loop_stack[loop_ptr].loop_label || | |
1032 | strNE(tmps,loop_stack[loop_ptr].loop_label) )) { | |
1033 | #ifdef DEBUGGING | |
1034 | if (debug & 4) { | |
1035 | deb("(Skipping label #%d %s)\n",loop_ptr, | |
1036 | loop_stack[loop_ptr].loop_label); | |
1037 | } | |
1038 | #endif | |
1039 | loop_ptr--; | |
1040 | } | |
1041 | #ifdef DEBUGGING | |
1042 | if (debug & 4) { | |
1043 | deb("(Found label #%d %s)\n",loop_ptr, | |
1044 | loop_stack[loop_ptr].loop_label); | |
1045 | } | |
1046 | #endif | |
1047 | if (loop_ptr < 0) { | |
1048 | in_eval = 0; | |
1049 | fatal("Bad label: %s", tmps); | |
1050 | } | |
1051 | longjmp(loop_stack[loop_ptr].loop_env, 1); | |
a687059c | 1052 | } |
de3bb511 | 1053 | fputs(message,stderr); |
a687059c LW |
1054 | (void)fflush(stderr); |
1055 | if (e_fp) | |
1056 | (void)UNLINK(e_tmpname); | |
1057 | statusvalue >>= 8; | |
27e2fb84 | 1058 | exit((int)((errno&255)?errno:((statusvalue&255)?statusvalue:255))); |
a687059c LW |
1059 | } |
1060 | ||
1061 | /*VARARGS0*/ | |
1062 | warn(va_alist) | |
1063 | va_dcl | |
1064 | { | |
1065 | va_list args; | |
de3bb511 | 1066 | char *message; |
a687059c LW |
1067 | |
1068 | #ifndef lint | |
1069 | va_start(args); | |
1070 | #else | |
1071 | args = 0; | |
1072 | #endif | |
de3bb511 | 1073 | message = mess(args); |
a687059c LW |
1074 | va_end(args); |
1075 | ||
de3bb511 | 1076 | fputs(message,stderr); |
a687059c LW |
1077 | #ifdef LEAKTEST |
1078 | #ifdef DEBUGGING | |
1079 | if (debug & 4096) | |
1080 | xstat(); | |
1081 | #endif | |
1082 | #endif | |
1083 | (void)fflush(stderr); | |
1084 | } | |
1085 | #endif | |
8d063cd8 | 1086 | |
8d063cd8 LW |
1087 | void |
1088 | setenv(nam,val) | |
1089 | char *nam, *val; | |
1090 | { | |
1091 | register int i=envix(nam); /* where does it go? */ | |
1092 | ||
fe14fcc3 LW |
1093 | if (environ == origenviron) { /* need we copy environment? */ |
1094 | int j; | |
1095 | int max; | |
1096 | char **tmpenv; | |
1097 | ||
de3bb511 | 1098 | /*SUPPRESS 530*/ |
fe14fcc3 LW |
1099 | for (max = i; environ[max]; max++) ; |
1100 | New(901,tmpenv, max+2, char*); | |
1101 | for (j=0; j<max; j++) /* copy environment */ | |
1102 | tmpenv[j] = savestr(environ[j]); | |
1103 | tmpenv[max] = Nullch; | |
1104 | environ = tmpenv; /* tell exec where it is now */ | |
1105 | } | |
a687059c LW |
1106 | if (!val) { |
1107 | while (environ[i]) { | |
1108 | environ[i] = environ[i+1]; | |
1109 | i++; | |
1110 | } | |
1111 | return; | |
1112 | } | |
8d063cd8 | 1113 | if (!environ[i]) { /* does not exist yet */ |
fe14fcc3 | 1114 | Renew(environ, i+2, char*); /* just expand it a bit */ |
8d063cd8 LW |
1115 | environ[i+1] = Nullch; /* make sure it's null terminated */ |
1116 | } | |
fe14fcc3 LW |
1117 | else |
1118 | Safefree(environ[i]); | |
a687059c | 1119 | New(904, environ[i], strlen(nam) + strlen(val) + 2, char); |
62b28dd9 | 1120 | #ifndef MSDOS |
a687059c | 1121 | (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */ |
62b28dd9 LW |
1122 | #else |
1123 | /* MS-DOS requires environment variable names to be in uppercase */ | |
fe14fcc3 LW |
1124 | /* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but |
1125 | * some utilities and applications may break because they only look | |
1126 | * for upper case strings. (Fixed strupr() bug here.)] | |
1127 | */ | |
1128 | strcpy(environ[i],nam); strupr(environ[i]); | |
62b28dd9 LW |
1129 | (void)sprintf(environ[i] + strlen(nam),"=%s",val); |
1130 | #endif /* MSDOS */ | |
8d063cd8 LW |
1131 | } |
1132 | ||
1133 | int | |
1134 | envix(nam) | |
1135 | char *nam; | |
1136 | { | |
1137 | register int i, len = strlen(nam); | |
1138 | ||
1139 | for (i = 0; environ[i]; i++) { | |
1140 | if (strnEQ(environ[i],nam,len) && environ[i][len] == '=') | |
1141 | break; /* strnEQ must come first to avoid */ | |
1142 | } /* potential SEGV's */ | |
1143 | return i; | |
1144 | } | |
378cc40b LW |
1145 | |
1146 | #ifdef EUNICE | |
1147 | unlnk(f) /* unlink all versions of a file */ | |
1148 | char *f; | |
1149 | { | |
1150 | int i; | |
1151 | ||
1152 | for (i = 0; unlink(f) >= 0; i++) ; | |
1153 | return i ? 0 : -1; | |
1154 | } | |
1155 | #endif | |
1156 | ||
fe14fcc3 LW |
1157 | #ifndef HAS_MEMCPY |
1158 | #ifndef HAS_BCOPY | |
378cc40b LW |
1159 | char * |
1160 | bcopy(from,to,len) | |
1161 | register char *from; | |
1162 | register char *to; | |
1163 | register int len; | |
1164 | { | |
1165 | char *retval = to; | |
1166 | ||
1167 | while (len--) | |
1168 | *to++ = *from++; | |
1169 | return retval; | |
1170 | } | |
ffed7fef | 1171 | #endif |
378cc40b | 1172 | |
fe14fcc3 | 1173 | #ifndef HAS_BZERO |
378cc40b LW |
1174 | char * |
1175 | bzero(loc,len) | |
1176 | register char *loc; | |
1177 | register int len; | |
1178 | { | |
1179 | char *retval = loc; | |
1180 | ||
1181 | while (len--) | |
1182 | *loc++ = 0; | |
1183 | return retval; | |
1184 | } | |
1185 | #endif | |
1186 | #endif | |
a687059c | 1187 | |
35c8bce7 | 1188 | #ifdef I_VARARGS |
fe14fcc3 | 1189 | #ifndef HAS_VPRINTF |
a687059c LW |
1190 | |
1191 | #ifdef CHARVSPRINTF | |
1192 | char * | |
1193 | #else | |
1194 | int | |
1195 | #endif | |
1196 | vsprintf(dest, pat, args) | |
1197 | char *dest, *pat, *args; | |
1198 | { | |
1199 | FILE fakebuf; | |
1200 | ||
1201 | fakebuf._ptr = dest; | |
1202 | fakebuf._cnt = 32767; | |
35c8bce7 LW |
1203 | #ifndef _IOSTRG |
1204 | #define _IOSTRG 0 | |
1205 | #endif | |
a687059c LW |
1206 | fakebuf._flag = _IOWRT|_IOSTRG; |
1207 | _doprnt(pat, args, &fakebuf); /* what a kludge */ | |
1208 | (void)putc('\0', &fakebuf); | |
1209 | #ifdef CHARVSPRINTF | |
1210 | return(dest); | |
1211 | #else | |
1212 | return 0; /* perl doesn't use return value */ | |
1213 | #endif | |
1214 | } | |
1215 | ||
1216 | #ifdef DEBUGGING | |
1217 | int | |
1218 | vfprintf(fd, pat, args) | |
1219 | FILE *fd; | |
1220 | char *pat, *args; | |
1221 | { | |
1222 | _doprnt(pat, args, fd); | |
1223 | return 0; /* wrong, but perl doesn't use the return value */ | |
1224 | } | |
1225 | #endif | |
fe14fcc3 | 1226 | #endif /* HAS_VPRINTF */ |
35c8bce7 | 1227 | #endif /* I_VARARGS */ |
a687059c | 1228 | |
988174c1 LW |
1229 | /* |
1230 | * I think my_swap(), htonl() and ntohl() have never been used. | |
1231 | * perl.h contains last-chance references to my_swap(), my_htonl() | |
1232 | * and my_ntohl(). I presume these are the intended functions; | |
1233 | * but htonl() and ntohl() have the wrong names. There are no | |
1234 | * functions my_htonl() and my_ntohl() defined anywhere. | |
1235 | * -DWS | |
1236 | */ | |
a687059c | 1237 | #ifdef MYSWAP |
ffed7fef | 1238 | #if BYTEORDER != 0x4321 |
a687059c LW |
1239 | short |
1240 | my_swap(s) | |
1241 | short s; | |
1242 | { | |
1243 | #if (BYTEORDER & 1) == 0 | |
1244 | short result; | |
1245 | ||
1246 | result = ((s & 255) << 8) + ((s >> 8) & 255); | |
1247 | return result; | |
1248 | #else | |
1249 | return s; | |
1250 | #endif | |
1251 | } | |
1252 | ||
1253 | long | |
1254 | htonl(l) | |
1255 | register long l; | |
1256 | { | |
1257 | union { | |
1258 | long result; | |
ffed7fef | 1259 | char c[sizeof(long)]; |
a687059c LW |
1260 | } u; |
1261 | ||
ffed7fef | 1262 | #if BYTEORDER == 0x1234 |
a687059c LW |
1263 | u.c[0] = (l >> 24) & 255; |
1264 | u.c[1] = (l >> 16) & 255; | |
1265 | u.c[2] = (l >> 8) & 255; | |
1266 | u.c[3] = l & 255; | |
1267 | return u.result; | |
1268 | #else | |
ffed7fef | 1269 | #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) |
a687059c LW |
1270 | fatal("Unknown BYTEORDER\n"); |
1271 | #else | |
1272 | register int o; | |
1273 | register int s; | |
1274 | ||
ffed7fef LW |
1275 | for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { |
1276 | u.c[o & 0xf] = (l >> s) & 255; | |
a687059c LW |
1277 | } |
1278 | return u.result; | |
1279 | #endif | |
1280 | #endif | |
1281 | } | |
1282 | ||
1283 | long | |
1284 | ntohl(l) | |
1285 | register long l; | |
1286 | { | |
1287 | union { | |
1288 | long l; | |
ffed7fef | 1289 | char c[sizeof(long)]; |
a687059c LW |
1290 | } u; |
1291 | ||
ffed7fef | 1292 | #if BYTEORDER == 0x1234 |
a687059c LW |
1293 | u.c[0] = (l >> 24) & 255; |
1294 | u.c[1] = (l >> 16) & 255; | |
1295 | u.c[2] = (l >> 8) & 255; | |
1296 | u.c[3] = l & 255; | |
1297 | return u.l; | |
1298 | #else | |
ffed7fef | 1299 | #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) |
a687059c LW |
1300 | fatal("Unknown BYTEORDER\n"); |
1301 | #else | |
1302 | register int o; | |
1303 | register int s; | |
1304 | ||
1305 | u.l = l; | |
1306 | l = 0; | |
ffed7fef LW |
1307 | for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { |
1308 | l |= (u.c[o & 0xf] & 255) << s; | |
a687059c LW |
1309 | } |
1310 | return l; | |
1311 | #endif | |
1312 | #endif | |
1313 | } | |
1314 | ||
ffed7fef | 1315 | #endif /* BYTEORDER != 0x4321 */ |
988174c1 LW |
1316 | #endif /* MYSWAP */ |
1317 | ||
1318 | /* | |
1319 | * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'. | |
1320 | * If these functions are defined, | |
1321 | * the BYTEORDER is neither 0x1234 nor 0x4321. | |
1322 | * However, this is not assumed. | |
1323 | * -DWS | |
1324 | */ | |
1325 | ||
1326 | #define HTOV(name,type) \ | |
1327 | type \ | |
1328 | name (n) \ | |
1329 | register type n; \ | |
1330 | { \ | |
1331 | union { \ | |
1332 | type value; \ | |
1333 | char c[sizeof(type)]; \ | |
1334 | } u; \ | |
1335 | register int i; \ | |
1336 | register int s; \ | |
1337 | for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ | |
1338 | u.c[i] = (n >> s) & 0xFF; \ | |
1339 | } \ | |
1340 | return u.value; \ | |
1341 | } | |
1342 | ||
1343 | #define VTOH(name,type) \ | |
1344 | type \ | |
1345 | name (n) \ | |
1346 | register type n; \ | |
1347 | { \ | |
1348 | union { \ | |
1349 | type value; \ | |
1350 | char c[sizeof(type)]; \ | |
1351 | } u; \ | |
1352 | register int i; \ | |
1353 | register int s; \ | |
1354 | u.value = n; \ | |
1355 | n = 0; \ | |
1356 | for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ | |
1357 | n += (u.c[i] & 0xFF) << s; \ | |
1358 | } \ | |
1359 | return n; \ | |
1360 | } | |
1361 | ||
1362 | #if defined(HAS_HTOVS) && !defined(htovs) | |
1363 | HTOV(htovs,short) | |
1364 | #endif | |
1365 | #if defined(HAS_HTOVL) && !defined(htovl) | |
1366 | HTOV(htovl,long) | |
1367 | #endif | |
1368 | #if defined(HAS_VTOHS) && !defined(vtohs) | |
1369 | VTOH(vtohs,short) | |
1370 | #endif | |
1371 | #if defined(HAS_VTOHL) && !defined(vtohl) | |
1372 | VTOH(vtohl,long) | |
1373 | #endif | |
a687059c | 1374 | |
0f85fab0 | 1375 | #ifndef MSDOS |
a687059c LW |
1376 | FILE * |
1377 | mypopen(cmd,mode) | |
1378 | char *cmd; | |
1379 | char *mode; | |
1380 | { | |
1381 | int p[2]; | |
1382 | register int this, that; | |
1383 | register int pid; | |
1384 | STR *str; | |
1385 | int doexec = strNE(cmd,"-"); | |
1386 | ||
1387 | if (pipe(p) < 0) | |
1388 | return Nullfp; | |
1389 | this = (*mode == 'w'); | |
1390 | that = !this; | |
d48672a2 LW |
1391 | #ifdef TAINT |
1392 | if (doexec) { | |
1393 | taintenv(); | |
1394 | taintproper("Insecure dependency in exec"); | |
1395 | } | |
1396 | #endif | |
a687059c LW |
1397 | while ((pid = (doexec?vfork():fork())) < 0) { |
1398 | if (errno != EAGAIN) { | |
1399 | close(p[this]); | |
1400 | if (!doexec) | |
1401 | fatal("Can't fork"); | |
1402 | return Nullfp; | |
1403 | } | |
1404 | sleep(5); | |
1405 | } | |
1406 | if (pid == 0) { | |
1407 | #define THIS that | |
1408 | #define THAT this | |
1409 | close(p[THAT]); | |
1410 | if (p[THIS] != (*mode == 'r')) { | |
1411 | dup2(p[THIS], *mode == 'r'); | |
1412 | close(p[THIS]); | |
1413 | } | |
1414 | if (doexec) { | |
d48672a2 | 1415 | #if !defined(HAS_FCNTL) || !defined(F_SETFD) |
ae986130 LW |
1416 | int fd; |
1417 | ||
1418 | #ifndef NOFILE | |
1419 | #define NOFILE 20 | |
1420 | #endif | |
d48672a2 | 1421 | for (fd = maxsysfd + 1; fd < NOFILE; fd++) |
ae986130 LW |
1422 | close(fd); |
1423 | #endif | |
a687059c | 1424 | do_exec(cmd); /* may or may not use the shell */ |
de3bb511 | 1425 | warn("Can't exec \"%s\": %s", cmd, strerror(errno)); |
a687059c LW |
1426 | _exit(1); |
1427 | } | |
de3bb511 | 1428 | /*SUPPRESS 560*/ |
a687059c LW |
1429 | if (tmpstab = stabent("$",allstabs)) |
1430 | str_numset(STAB_STR(tmpstab),(double)getpid()); | |
9f68db38 | 1431 | forkprocess = 0; |
fe14fcc3 | 1432 | hclear(pidstatus, FALSE); /* we have no children */ |
a687059c LW |
1433 | return Nullfp; |
1434 | #undef THIS | |
1435 | #undef THAT | |
1436 | } | |
62b28dd9 | 1437 | do_execfree(); /* free any memory malloced by child on vfork */ |
a687059c | 1438 | close(p[that]); |
62b28dd9 LW |
1439 | if (p[that] < p[this]) { |
1440 | dup2(p[this], p[that]); | |
1441 | close(p[this]); | |
1442 | p[this] = p[that]; | |
1443 | } | |
20188a90 LW |
1444 | str = afetch(fdpid,p[this],TRUE); |
1445 | str->str_u.str_useful = pid; | |
a687059c LW |
1446 | forkprocess = pid; |
1447 | return fdopen(p[this], mode); | |
1448 | } | |
0f85fab0 | 1449 | #endif /* !MSDOS */ |
a687059c | 1450 | |
ae986130 LW |
1451 | #ifdef NOTDEF |
1452 | dumpfds(s) | |
1453 | char *s; | |
1454 | { | |
1455 | int fd; | |
1456 | struct stat tmpstatbuf; | |
1457 | ||
1458 | fprintf(stderr,"%s", s); | |
1459 | for (fd = 0; fd < 32; fd++) { | |
1460 | if (fstat(fd,&tmpstatbuf) >= 0) | |
1461 | fprintf(stderr," %d",fd); | |
1462 | } | |
1463 | fprintf(stderr,"\n"); | |
1464 | } | |
1465 | #endif | |
1466 | ||
fe14fcc3 | 1467 | #ifndef HAS_DUP2 |
a687059c LW |
1468 | dup2(oldfd,newfd) |
1469 | int oldfd; | |
1470 | int newfd; | |
1471 | { | |
fe14fcc3 | 1472 | #if defined(HAS_FCNTL) && defined(F_DUPFD) |
62b28dd9 LW |
1473 | close(newfd); |
1474 | fcntl(oldfd, F_DUPFD, newfd); | |
1475 | #else | |
d48672a2 | 1476 | int fdtmp[256]; |
ae986130 LW |
1477 | int fdx = 0; |
1478 | int fd; | |
1479 | ||
fe14fcc3 LW |
1480 | if (oldfd == newfd) |
1481 | return 0; | |
a687059c | 1482 | close(newfd); |
ae986130 LW |
1483 | while ((fd = dup(oldfd)) != newfd) /* good enough for low fd's */ |
1484 | fdtmp[fdx++] = fd; | |
1485 | while (fdx > 0) | |
1486 | close(fdtmp[--fdx]); | |
62b28dd9 | 1487 | #endif |
a687059c LW |
1488 | } |
1489 | #endif | |
1490 | ||
0f85fab0 | 1491 | #ifndef MSDOS |
a687059c LW |
1492 | int |
1493 | mypclose(ptr) | |
1494 | FILE *ptr; | |
1495 | { | |
a687059c LW |
1496 | #ifdef VOIDSIG |
1497 | void (*hstat)(), (*istat)(), (*qstat)(); | |
1498 | #else | |
1499 | int (*hstat)(), (*istat)(), (*qstat)(); | |
1500 | #endif | |
1501 | int status; | |
1502 | STR *str; | |
20188a90 | 1503 | int pid; |
a687059c | 1504 | |
20188a90 | 1505 | str = afetch(fdpid,fileno(ptr),TRUE); |
de3bb511 | 1506 | pid = (int)str->str_u.str_useful; |
20188a90 | 1507 | astore(fdpid,fileno(ptr),Nullstr); |
a687059c | 1508 | fclose(ptr); |
a687059c LW |
1509 | hstat = signal(SIGHUP, SIG_IGN); |
1510 | istat = signal(SIGINT, SIG_IGN); | |
1511 | qstat = signal(SIGQUIT, SIG_IGN); | |
20188a90 LW |
1512 | pid = wait4pid(pid, &status, 0); |
1513 | signal(SIGHUP, hstat); | |
1514 | signal(SIGINT, istat); | |
1515 | signal(SIGQUIT, qstat); | |
1516 | return(pid < 0 ? pid : status); | |
1517 | } | |
1518 | ||
1519 | int | |
1520 | wait4pid(pid,statusp,flags) | |
1521 | int pid; | |
1522 | int *statusp; | |
1523 | int flags; | |
1524 | { | |
de3bb511 | 1525 | #if !defined(HAS_WAIT4) && !defined(HAS_WAITPID) |
20188a90 LW |
1526 | int result; |
1527 | STR *str; | |
1528 | char spid[16]; | |
de3bb511 | 1529 | #endif |
20188a90 LW |
1530 | |
1531 | if (!pid) | |
1532 | return -1; | |
fe14fcc3 LW |
1533 | #ifdef HAS_WAIT4 |
1534 | return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *)); | |
a687059c | 1535 | #else |
fe14fcc3 | 1536 | #ifdef HAS_WAITPID |
20188a90 LW |
1537 | return waitpid(pid,statusp,flags); |
1538 | #else | |
1539 | if (pid > 0) { | |
1540 | sprintf(spid, "%d", pid); | |
e5d73d77 | 1541 | str = hfetch(pidstatus,spid,strlen(spid),FALSE); |
20188a90 LW |
1542 | if (str != &str_undef) { |
1543 | *statusp = (int)str->str_u.str_useful; | |
e5d73d77 | 1544 | hdelete(pidstatus,spid,strlen(spid)); |
20188a90 LW |
1545 | return pid; |
1546 | } | |
1547 | } | |
1548 | else { | |
1549 | HENT *entry; | |
1550 | ||
1551 | hiterinit(pidstatus); | |
1552 | if (entry = hiternext(pidstatus)) { | |
1553 | pid = atoi(hiterkey(entry,statusp)); | |
1554 | str = hiterval(entry); | |
1555 | *statusp = (int)str->str_u.str_useful; | |
1556 | sprintf(spid, "%d", pid); | |
e5d73d77 | 1557 | hdelete(pidstatus,spid,strlen(spid)); |
20188a90 LW |
1558 | return pid; |
1559 | } | |
1560 | } | |
1561 | if (flags) | |
1562 | fatal("Can't do waitpid with flags"); | |
a687059c | 1563 | else { |
20188a90 LW |
1564 | while ((result = wait(statusp)) != pid && pid > 0 && result >= 0) |
1565 | pidgone(result,*statusp); | |
a687059c | 1566 | if (result < 0) |
20188a90 | 1567 | *statusp = -1; |
a687059c | 1568 | } |
e5d73d77 | 1569 | return result; |
a687059c | 1570 | #endif |
20188a90 | 1571 | #endif |
a687059c LW |
1572 | } |
1573 | ||
de3bb511 | 1574 | /*SUPPRESS 590*/ |
a687059c LW |
1575 | pidgone(pid,status) |
1576 | int pid; | |
1577 | int status; | |
1578 | { | |
fe14fcc3 | 1579 | #if defined(HAS_WAIT4) || defined(HAS_WAITPID) |
a687059c | 1580 | #else |
a687059c | 1581 | register STR *str; |
20188a90 | 1582 | char spid[16]; |
a687059c | 1583 | |
20188a90 | 1584 | sprintf(spid, "%d", pid); |
e5d73d77 | 1585 | str = hfetch(pidstatus,spid,strlen(spid),TRUE); |
20188a90 | 1586 | str->str_u.str_useful = status; |
a687059c | 1587 | #endif |
20188a90 | 1588 | return; |
a687059c | 1589 | } |
fe14fcc3 | 1590 | #endif /* !MSDOS */ |
a687059c | 1591 | |
fe14fcc3 | 1592 | #ifndef HAS_MEMCMP |
a687059c LW |
1593 | memcmp(s1,s2,len) |
1594 | register unsigned char *s1; | |
1595 | register unsigned char *s2; | |
1596 | register int len; | |
1597 | { | |
1598 | register int tmp; | |
1599 | ||
1600 | while (len--) { | |
1601 | if (tmp = *s1++ - *s2++) | |
1602 | return tmp; | |
1603 | } | |
1604 | return 0; | |
1605 | } | |
fe14fcc3 | 1606 | #endif /* HAS_MEMCMP */ |
9f68db38 LW |
1607 | |
1608 | void | |
1609 | repeatcpy(to,from,len,count) | |
1610 | register char *to; | |
1611 | register char *from; | |
1612 | int len; | |
1613 | register int count; | |
1614 | { | |
1615 | register int todo; | |
1616 | register char *frombase = from; | |
1617 | ||
1618 | if (len == 1) { | |
1619 | todo = *from; | |
1620 | while (count-- > 0) | |
1621 | *to++ = todo; | |
1622 | return; | |
1623 | } | |
1624 | while (count-- > 0) { | |
1625 | for (todo = len; todo > 0; todo--) { | |
1626 | *to++ = *from++; | |
1627 | } | |
1628 | from = frombase; | |
1629 | } | |
1630 | } | |
0f85fab0 LW |
1631 | |
1632 | #ifndef CASTNEGFLOAT | |
1633 | unsigned long | |
1634 | castulong(f) | |
1635 | double f; | |
1636 | { | |
1637 | long along; | |
1638 | ||
27e2fb84 | 1639 | #if CASTFLAGS & 2 |
34de22dd LW |
1640 | # define BIGDOUBLE 2147483648.0 |
1641 | if (f >= BIGDOUBLE) | |
1642 | return (unsigned long)(f-(long)(f/BIGDOUBLE)*BIGDOUBLE)|0x80000000; | |
1643 | #endif | |
0f85fab0 LW |
1644 | if (f >= 0.0) |
1645 | return (unsigned long)f; | |
1646 | along = (long)f; | |
1647 | return (unsigned long)along; | |
1648 | } | |
1649 | #endif | |
62b28dd9 | 1650 | |
fe14fcc3 | 1651 | #ifndef HAS_RENAME |
62b28dd9 LW |
1652 | int |
1653 | same_dirent(a,b) | |
1654 | char *a; | |
1655 | char *b; | |
1656 | { | |
1657 | char *fa = rindex(a,'/'); | |
1658 | char *fb = rindex(b,'/'); | |
1659 | struct stat tmpstatbuf1; | |
1660 | struct stat tmpstatbuf2; | |
1661 | #ifndef MAXPATHLEN | |
1662 | #define MAXPATHLEN 1024 | |
1663 | #endif | |
1664 | char tmpbuf[MAXPATHLEN+1]; | |
1665 | ||
1666 | if (fa) | |
1667 | fa++; | |
1668 | else | |
1669 | fa = a; | |
1670 | if (fb) | |
1671 | fb++; | |
1672 | else | |
1673 | fb = b; | |
1674 | if (strNE(a,b)) | |
1675 | return FALSE; | |
1676 | if (fa == a) | |
6eb13c3b | 1677 | strcpy(tmpbuf,"."); |
62b28dd9 LW |
1678 | else |
1679 | strncpy(tmpbuf, a, fa - a); | |
1680 | if (stat(tmpbuf, &tmpstatbuf1) < 0) | |
1681 | return FALSE; | |
1682 | if (fb == b) | |
6eb13c3b | 1683 | strcpy(tmpbuf,"."); |
62b28dd9 LW |
1684 | else |
1685 | strncpy(tmpbuf, b, fb - b); | |
1686 | if (stat(tmpbuf, &tmpstatbuf2) < 0) | |
1687 | return FALSE; | |
1688 | return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev && | |
1689 | tmpstatbuf1.st_ino == tmpstatbuf2.st_ino; | |
1690 | } | |
fe14fcc3 LW |
1691 | #endif /* !HAS_RENAME */ |
1692 | ||
1693 | unsigned long | |
1694 | scanoct(start, len, retlen) | |
1695 | char *start; | |
1696 | int len; | |
1697 | int *retlen; | |
1698 | { | |
1699 | register char *s = start; | |
1700 | register unsigned long retval = 0; | |
1701 | ||
1702 | while (len-- && *s >= '0' && *s <= '7') { | |
1703 | retval <<= 3; | |
1704 | retval |= *s++ - '0'; | |
1705 | } | |
1706 | *retlen = s - start; | |
1707 | return retval; | |
1708 | } | |
1709 | ||
1710 | unsigned long | |
1711 | scanhex(start, len, retlen) | |
1712 | char *start; | |
1713 | int len; | |
1714 | int *retlen; | |
1715 | { | |
1716 | register char *s = start; | |
1717 | register unsigned long retval = 0; | |
1718 | char *tmp; | |
1719 | ||
1720 | while (len-- && *s && (tmp = index(hexdigit, *s))) { | |
1721 | retval <<= 4; | |
1722 | retval |= (tmp - hexdigit) & 15; | |
1723 | s++; | |
1724 | } | |
1725 | *retlen = s - start; | |
1726 | return retval; | |
1727 | } |