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more complete support for implicit thread/interpreter pointer,
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
4eb8286e 3 * Copyright (c) 1991-1999, 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 7 *
8d063cd8 8 */
a0d0e21e
LW		 9
10/*
11 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
12 * not content." --Gandalf
13 */
8d063cd8 14
8d063cd8 15#include "EXTERN.h"
864dbfa3 16#define PERL_IN_UTIL_C
8d063cd8 17#include "perl.h"
62b28dd9 18
e1dfb34b 19#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
a687059c 20#include <signal.h>
62b28dd9 21#endif
a687059c 22
36477c24 23#ifndef SIG_ERR
24# define SIG_ERR ((Sighandler_t) -1)
25#endif
26
bd4080b3 27/* XXX If this causes problems, set i_unistd=undef in the hint file. */
85e6fe83 28#ifdef I_UNISTD
8990e307
LW		 29# include <unistd.h>
30#endif
31
a687059c
LW		 32#ifdef I_VFORK
33# include <vfork.h>
34#endif
35
94b6baf5
AD		 36/* Put this after #includes because fork and vfork prototypes may
37 conflict.
38*/
39#ifndef HAS_VFORK
40# define vfork fork
41#endif
42
fe14fcc3
LW		 43#ifdef I_FCNTL
44# include <fcntl.h>
45#endif
46#ifdef I_SYS_FILE
47# include <sys/file.h>
48#endif
49
ff68c719 50#ifdef I_SYS_WAIT
51# include <sys/wait.h>
52#endif
53
8d063cd8 54#define FLUSH
8d063cd8 55
a0d0e21e 56#ifdef LEAKTEST
a0d0e21e 57
8c52afec
IZ		 58long xcount[MAXXCOUNT];
59long lastxcount[MAXXCOUNT];
60long xycount[MAXXCOUNT][MAXYCOUNT];
61long lastxycount[MAXXCOUNT][MAXYCOUNT];
62
a0d0e21e 63#endif
a863c7d1 64
f2517201 65/* paranoid version of system's malloc() */
8d063cd8 66
a687059c
LW		 67/* NOTE: Do not call the next three routines directly. Use the macros
68 * in handy.h, so that we can easily redefine everything to do tracking of
69 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 70 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 71 */
72
bd4080b3 73Malloc_t
864dbfa3 74Perl_safesysmalloc(pTHX_ MEM_SIZE size)
8d063cd8 75{
bd4080b3 76 Malloc_t ptr;
55497cff 77#ifdef HAS_64K_LIMIT
62b28dd9 78 if (size > 0xffff) {
760ac839 79 PerlIO_printf(PerlIO_stderr(), "Allocation too large: %lx\n", size) FLUSH;
79072805 80 my_exit(1);
62b28dd9 81 }
55497cff 82#endif /* HAS_64K_LIMIT */
34de22dd
LW		 83#ifdef DEBUGGING
84 if ((long)size < 0)
cea2e8a9 85 Perl_croak(aTHX_ "panic: malloc");
34de22dd 86#endif
6ad3d225 87 ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
79072805 88#if !(defined(I286) || defined(atarist))
3280af22 89 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
79072805 90#else
6b88bc9c 91 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
8d063cd8
LW		 92#endif
93 if (ptr != Nullch)
94 return ptr;
3280af22 95 else if (PL_nomemok)
7c0587c8 96 return Nullch;
8d063cd8 97 else {
22c35a8c 98 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
79072805 99 my_exit(1);
4e35701f 100 return Nullch;
8d063cd8
LW		 101 }
102 /*NOTREACHED*/
103}
104
f2517201 105/* paranoid version of system's realloc() */
8d063cd8 106
bd4080b3 107Malloc_t
864dbfa3 108Perl_safesysrealloc(pTHX_ Malloc_t where,MEM_SIZE size)
8d063cd8 109{
bd4080b3 110 Malloc_t ptr;
ecfc5424 111#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE)
6ad3d225 112 Malloc_t PerlMem_realloc();
ecfc5424 113#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 114
55497cff 115#ifdef HAS_64K_LIMIT
5f05dabc 116 if (size > 0xffff) {
117 PerlIO_printf(PerlIO_stderr(),
118 "Reallocation too large: %lx\n", size) FLUSH;
119 my_exit(1);
120 }
55497cff 121#endif /* HAS_64K_LIMIT */
7614df0c 122 if (!size) {
f2517201 123 safesysfree(where);
7614df0c
JD		 124 return NULL;
125 }
126
378cc40b 127 if (!where)
f2517201 128 return safesysmalloc(size);
34de22dd
LW		 129#ifdef DEBUGGING
130 if ((long)size < 0)
cea2e8a9 131 Perl_croak(aTHX_ "panic: realloc");
34de22dd 132#endif
7614df0c 133 ptr = PerlMem_realloc(where,size);
79072805
LW		 134
135#if !(defined(I286) || defined(atarist))
136 DEBUG_m( {
3280af22
NIS		 137 PerlIO_printf(Perl_debug_log, "0x%x: (%05d) rfree\n",where,PL_an++);
138 PerlIO_printf(Perl_debug_log, "0x%x: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
79072805
LW		 139 } )
140#else
141 DEBUG_m( {
6b88bc9c
GS		 142 PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) rfree\n",where,PL_an++);
143 PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
79072805 144 } )
8d063cd8 145#endif
79072805 146
8d063cd8
LW		 147 if (ptr != Nullch)
148 return ptr;
3280af22 149 else if (PL_nomemok)
7c0587c8 150 return Nullch;
8d063cd8 151 else {
22c35a8c 152 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
79072805 153 my_exit(1);
4e35701f 154 return Nullch;
8d063cd8
LW		 155 }
156 /*NOTREACHED*/
157}
158
f2517201 159/* safe version of system's free() */
8d063cd8 160
54310121 161Free_t
864dbfa3 162Perl_safesysfree(pTHX_ Malloc_t where)
8d063cd8 163{
79072805 164#if !(defined(I286) || defined(atarist))
3280af22 165 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%x: (%05d) free\n",(char *) where,PL_an++));
79072805 166#else
6b88bc9c 167 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) free\n",(char *) where,PL_an++));
8d063cd8 168#endif
378cc40b 169 if (where) {
de3bb511 170 /*SUPPRESS 701*/
6ad3d225 171 PerlMem_free(where);
378cc40b 172 }
8d063cd8
LW		 173}
174
f2517201 175/* safe version of system's calloc() */
1050c9ca 176
bd4080b3 177Malloc_t
864dbfa3 178Perl_safesyscalloc(pTHX_ MEM_SIZE count, MEM_SIZE size)
1050c9ca 179{
bd4080b3 180 Malloc_t ptr;
1050c9ca 181
55497cff 182#ifdef HAS_64K_LIMIT
5f05dabc 183 if (size * count > 0xffff) {
184 PerlIO_printf(PerlIO_stderr(),
185 "Allocation too large: %lx\n", size * count) FLUSH;
186 my_exit(1);
187 }
55497cff 188#endif /* HAS_64K_LIMIT */
1050c9ca 189#ifdef DEBUGGING
190 if ((long)size < 0 || (long)count < 0)
cea2e8a9 191 Perl_croak(aTHX_ "panic: calloc");
1050c9ca 192#endif
0b7c1c42 193 size *= count;
6ad3d225 194 ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
1050c9ca 195#if !(defined(I286) || defined(atarist))
3280af22 196 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
1050c9ca 197#else
6b88bc9c 198 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
1050c9ca 199#endif
1050c9ca 200 if (ptr != Nullch) {
201 memset((void*)ptr, 0, size);
202 return ptr;
203 }
3280af22 204 else if (PL_nomemok)
1050c9ca 205 return Nullch;
206 else {
22c35a8c 207 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
1050c9ca 208 my_exit(1);
4e35701f 209 return Nullch;
1050c9ca 210 }
211 /*NOTREACHED*/
212}
213
a687059c
LW		 214#ifdef LEAKTEST
215
8c52afec
IZ		 216struct mem_test_strut {
217 union {
218 long type;
219 char c[2];
220 } u;
221 long size;
222};
223
224# define ALIGN sizeof(struct mem_test_strut)
225
226# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
227# define typeof_chunk(ch) \
228 (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
229# define set_typeof_chunk(ch,t) \
230 (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
231#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
232 ? MAXYCOUNT - 1 \
233 : ( (size) > 40 \
234 ? ((size) - 1)/8 + 5 \
235 : ((size) - 1)/4))
8d063cd8 236
bd4080b3 237Malloc_t
864dbfa3 238Perl_safexmalloc(pTHX_ I32 x, MEM_SIZE size)
8d063cd8 239{
8c52afec 240 register char* where = (char*)safemalloc(size + ALIGN);
8d063cd8 241
8c52afec
IZ		 242 xcount[x] += size;
243 xycount[x][SIZE_TO_Y(size)]++;
244 set_typeof_chunk(where, x);
245 sizeof_chunk(where) = size;
246 return (Malloc_t)(where + ALIGN);
8d063cd8 247}
8d063cd8 248
bd4080b3 249Malloc_t
864dbfa3 250Perl_safexrealloc(pTHX_ Malloc_t wh, MEM_SIZE size)
a687059c 251{
8c52afec
IZ		 252 char *where = (char*)wh;
253
254 if (!wh)
255 return safexmalloc(0,size);
256
257 {
258 MEM_SIZE old = sizeof_chunk(where - ALIGN);
259 int t = typeof_chunk(where - ALIGN);
260 register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
261
262 xycount[t][SIZE_TO_Y(old)]--;
263 xycount[t][SIZE_TO_Y(size)]++;
264 xcount[t] += size - old;
265 sizeof_chunk(new) = size;
266 return (Malloc_t)(new + ALIGN);
267 }
a687059c
LW		 268}
269
270void
864dbfa3 271Perl_safexfree(pTHX_ Malloc_t wh)
a687059c 272{
79072805 273 I32 x;
8c52afec
IZ		 274 char *where = (char*)wh;
275 MEM_SIZE size;
276
a687059c
LW		 277 if (!where)
278 return;
279 where -= ALIGN;
8c52afec 280 size = sizeof_chunk(where);
a687059c 281 x = where[0] + 100 * where[1];
8c52afec
IZ		 282 xcount[x] -= size;
283 xycount[x][SIZE_TO_Y(size)]--;
a687059c
LW		 284 safefree(where);
285}
286
bd4080b3 287Malloc_t
864dbfa3 288Perl_safexcalloc(pTHX_ I32 x,MEM_SIZE count, MEM_SIZE size)
1050c9ca 289{
8c52afec
IZ		 290 register char * where = (char*)safexmalloc(x, size * count + ALIGN);
291 xcount[x] += size;
292 xycount[x][SIZE_TO_Y(size)]++;
293 memset((void*)(where + ALIGN), 0, size * count);
294 set_typeof_chunk(where, x);
295 sizeof_chunk(where) = size;
296 return (Malloc_t)(where + ALIGN);
1050c9ca 297}
298
864dbfa3 299STATIC void
cea2e8a9 300S_xstat(pTHX_ int flag)
8d063cd8 301{
8c52afec
IZ		 302 register I32 i, j, total = 0;
303 I32 subtot[MAXYCOUNT];
8d063cd8 304
8c52afec
IZ		 305 for (j = 0; j < MAXYCOUNT; j++) {
306 subtot[j] = 0;
307 }
308
309 PerlIO_printf(PerlIO_stderr(), " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total);
a687059c 310 for (i = 0; i < MAXXCOUNT; i++) {
8c52afec
IZ		 311 total += xcount[i];
312 for (j = 0; j < MAXYCOUNT; j++) {
313 subtot[j] += xycount[i][j];
314 }
315 if (flag == 0
316 ? xcount[i] /* Have something */
317 : (flag == 2
318 ? xcount[i] != lastxcount[i] /* Changed */
319 : xcount[i] > lastxcount[i])) { /* Growed */
320 PerlIO_printf(PerlIO_stderr(),"%2d %02d %7ld ", i / 100, i % 100,
321 flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
a687059c 322 lastxcount[i] = xcount[i];
8c52afec
IZ		 323 for (j = 0; j < MAXYCOUNT; j++) {
324 if ( flag == 0
325 ? xycount[i][j] /* Have something */
326 : (flag == 2
327 ? xycount[i][j] != lastxycount[i][j] /* Changed */
328 : xycount[i][j] > lastxycount[i][j])) { /* Growed */
329 PerlIO_printf(PerlIO_stderr(),"%3ld ",
330 flag == 2
331 ? xycount[i][j] - lastxycount[i][j]
332 : xycount[i][j]);
333 lastxycount[i][j] = xycount[i][j];
334 } else {
335 PerlIO_printf(PerlIO_stderr(), " . ", xycount[i][j]);
336 }
337 }
338 PerlIO_printf(PerlIO_stderr(), "\n");
339 }
340 }
341 if (flag != 2) {
342 PerlIO_printf(PerlIO_stderr(), "Total %7ld ", total);
343 for (j = 0; j < MAXYCOUNT; j++) {
344 if (subtot[j]) {
345 PerlIO_printf(PerlIO_stderr(), "%3ld ", subtot[j]);
346 } else {
347 PerlIO_printf(PerlIO_stderr(), " . ");
348 }
8d063cd8 349 }
8c52afec 350 PerlIO_printf(PerlIO_stderr(), "\n");
8d063cd8 351 }
8d063cd8 352}
a687059c
LW		 353
354#endif /* LEAKTEST */
8d063cd8
LW		 355
356/* copy a string up to some (non-backslashed) delimiter, if any */
357
358char *
864dbfa3 359Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
8d063cd8 360{
fc36a67e 361 register I32 tolen;
362 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 363 if (*from == '\\') {
364 if (from[1] == delim)
365 from++;
fc36a67e 366 else {
367 if (to < toend)
368 *to++ = *from;
369 tolen++;
370 from++;
371 }
378cc40b 372 }
bedebaa5 373 else if (*from == delim)
8d063cd8 374 break;
fc36a67e 375 if (to < toend)
376 *to++ = *from;
8d063cd8 377 }
bedebaa5
CS		 378 if (to < toend)
379 *to = '\0';
fc36a67e 380 *retlen = tolen;
8d063cd8
LW		 381 return from;
382}
383
384/* return ptr to little string in big string, NULL if not found */
378cc40b 385/* This routine was donated by Corey Satten. */
8d063cd8
LW		 386
387char *
864dbfa3 388Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 389{
08105a92 390 register const char *s, *x;
79072805 391 register I32 first;
378cc40b 392
a687059c 393 if (!little)
08105a92 394 return (char*)big;
a687059c 395 first = *little++;
378cc40b 396 if (!first)
08105a92 397 return (char*)big;
378cc40b
LW		 398 while (*big) {
399 if (*big++ != first)
400 continue;
401 for (x=big,s=little; *s; /**/ ) {
402 if (!*x)
403 return Nullch;
404 if (*s++ != *x++) {
405 s--;
406 break;
407 }
408 }
409 if (!*s)
08105a92 410 return (char*)(big-1);
378cc40b
LW		 411 }
412 return Nullch;
413}
8d063cd8 414
a687059c
LW		 415/* same as instr but allow embedded nulls */
416
417char *
864dbfa3 418Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 419{
08105a92 420 register const char *s, *x;
79072805 421 register I32 first = *little;
08105a92 422 register const char *littleend = lend;
378cc40b 423
a0d0e21e 424 if (!first && little >= littleend)
08105a92 425 return (char*)big;
de3bb511
LW		 426 if (bigend - big < littleend - little)
427 return Nullch;
a687059c
LW		 428 bigend -= littleend - little++;
429 while (big <= bigend) {
430 if (*big++ != first)
431 continue;
432 for (x=big,s=little; s < littleend; /**/ ) {
433 if (*s++ != *x++) {
434 s--;
435 break;
436 }
437 }
438 if (s >= littleend)
08105a92 439 return (char*)(big-1);
378cc40b 440 }
a687059c
LW		 441 return Nullch;
442}
443
444/* reverse of the above--find last substring */
445
446char *
864dbfa3 447Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 448{
08105a92
GS		 449 register const char *bigbeg;
450 register const char *s, *x;
79072805 451 register I32 first = *little;
08105a92 452 register const char *littleend = lend;
a687059c 453
a0d0e21e 454 if (!first && little >= littleend)
08105a92 455 return (char*)bigend;
a687059c
LW		 456 bigbeg = big;
457 big = bigend - (littleend - little++);
458 while (big >= bigbeg) {
459 if (*big-- != first)
460 continue;
461 for (x=big+2,s=little; s < littleend; /**/ ) {
462 if (*s++ != *x++) {
463 s--;
464 break;
465 }
466 }
467 if (s >= littleend)
08105a92 468 return (char*)(big+1);
378cc40b 469 }
a687059c 470 return Nullch;
378cc40b 471}
a687059c 472
bbce6d69 473/*
474 * Set up for a new ctype locale.
475 */
55497cff 476void
864dbfa3 477Perl_new_ctype(pTHX_ const char *newctype)
ef7eada9 478{
36477c24 479#ifdef USE_LOCALE_CTYPE
480
bbce6d69 481 int i;
ef7eada9 482
bbce6d69 483 for (i = 0; i < 256; i++) {
484 if (isUPPER_LC(i))
22c35a8c 485 PL_fold_locale[i] = toLOWER_LC(i);
bbce6d69 486 else if (isLOWER_LC(i))
22c35a8c 487 PL_fold_locale[i] = toUPPER_LC(i);
bbce6d69 488 else
22c35a8c 489 PL_fold_locale[i] = i;
bbce6d69 490 }
bbce6d69 491
36477c24 492#endif /* USE_LOCALE_CTYPE */
493}
bbce6d69 494
495/*
496 * Set up for a new collation locale.
497 */
498void
864dbfa3 499Perl_new_collate(pTHX_ const char *newcoll)
bbce6d69 500{
36477c24 501#ifdef USE_LOCALE_COLLATE
502
bbce6d69 503 if (! newcoll) {
3280af22
NIS		 504 if (PL_collation_name) {
505 ++PL_collation_ix;
506 Safefree(PL_collation_name);
507 PL_collation_name = NULL;
508 PL_collation_standard = TRUE;
509 PL_collxfrm_base = 0;
510 PL_collxfrm_mult = 2;
bbce6d69 511 }
512 return;
513 }
514
3280af22
NIS		 515 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
516 ++PL_collation_ix;
517 Safefree(PL_collation_name);
518 PL_collation_name = savepv(newcoll);
519 PL_collation_standard = (strEQ(newcoll, "C") || strEQ(newcoll, "POSIX"));
bbce6d69 520
bbce6d69 521 {
522 /* 2: at most so many chars ('a', 'b'). */
523 /* 50: surely no system expands a char more. */
524#define XFRMBUFSIZE (2 * 50)
525 char xbuf[XFRMBUFSIZE];
526 Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
527 Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
528 SSize_t mult = fb - fa;
529 if (mult < 1)
cea2e8a9 530 Perl_croak(aTHX_ "strxfrm() gets absurd");
3280af22
NIS		 531 PL_collxfrm_base = (fa > mult) ? (fa - mult) : 0;
532 PL_collxfrm_mult = mult;
bbce6d69 533 }
bbce6d69 534 }
bbce6d69 535
36477c24 536#endif /* USE_LOCALE_COLLATE */
537}
bbce6d69 538
539/*
540 * Set up for a new numeric locale.
541 */
542void
864dbfa3 543Perl_new_numeric(pTHX_ const char *newnum)
bbce6d69 544{
36477c24 545#ifdef USE_LOCALE_NUMERIC
546
bbce6d69 547 if (! newnum) {
3280af22
NIS		 548 if (PL_numeric_name) {
549 Safefree(PL_numeric_name);
550 PL_numeric_name = NULL;
551 PL_numeric_standard = TRUE;
552 PL_numeric_local = TRUE;
bbce6d69 553 }
554 return;
555 }
556
3280af22
NIS		 557 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
558 Safefree(PL_numeric_name);
559 PL_numeric_name = savepv(newnum);
560 PL_numeric_standard = (strEQ(newnum, "C") || strEQ(newnum, "POSIX"));
561 PL_numeric_local = TRUE;
bbce6d69 562 }
36477c24 563
564#endif /* USE_LOCALE_NUMERIC */
bbce6d69 565}
566
567void
864dbfa3 568Perl_set_numeric_standard(pTHX)
bbce6d69 569{
5f05dabc 570#ifdef USE_LOCALE_NUMERIC
571
3280af22 572 if (! PL_numeric_standard) {
bbce6d69 573 setlocale(LC_NUMERIC, "C");
3280af22
NIS		 574 PL_numeric_standard = TRUE;
575 PL_numeric_local = FALSE;
bbce6d69 576 }
5f05dabc 577
578#endif /* USE_LOCALE_NUMERIC */
bbce6d69 579}
580
581void
864dbfa3 582Perl_set_numeric_local(pTHX)
bbce6d69 583{
5f05dabc 584#ifdef USE_LOCALE_NUMERIC
585
3280af22
NIS		 586 if (! PL_numeric_local) {
587 setlocale(LC_NUMERIC, PL_numeric_name);
588 PL_numeric_standard = FALSE;
589 PL_numeric_local = TRUE;
bbce6d69 590 }
bbce6d69 591
36477c24 592#endif /* USE_LOCALE_NUMERIC */
5f05dabc 593}
36477c24 594
bbce6d69 595
36477c24 596/*
597 * Initialize locale awareness.
598 */
f0c5b223 599int
864dbfa3 600Perl_init_i18nl10n(pTHX_ int printwarn)
f0c5b223
TB		 601{
602 int ok = 1;
603 /* returns
604 * 1 = set ok or not applicable,
605 * 0 = fallback to C locale,
606 * -1 = fallback to C locale failed
607 */
bbce6d69 608
36477c24 609#ifdef USE_LOCALE
bbce6d69 610
36477c24 611#ifdef USE_LOCALE_CTYPE
bbce6d69 612 char *curctype = NULL;
36477c24 613#endif /* USE_LOCALE_CTYPE */
614#ifdef USE_LOCALE_COLLATE
bbce6d69 615 char *curcoll = NULL;
36477c24 616#endif /* USE_LOCALE_COLLATE */
617#ifdef USE_LOCALE_NUMERIC
bbce6d69 618 char *curnum = NULL;
36477c24 619#endif /* USE_LOCALE_NUMERIC */
3aeabbed
JH		 620#ifdef __GLIBC__
621 char *language = PerlEnv_getenv("LANGUAGE");
622#endif
76e3520e
GS		 623 char *lc_all = PerlEnv_getenv("LC_ALL");
624 char *lang = PerlEnv_getenv("LANG");
bbce6d69 625 bool setlocale_failure = FALSE;
f0c5b223 626
02b32252
CS		 627#ifdef LOCALE_ENVIRON_REQUIRED
628
629 /*
630 * Ultrix setlocale(..., "") fails if there are no environment
631 * variables from which to get a locale name.
632 */
633
634 bool done = FALSE;
635
636#ifdef LC_ALL
637 if (lang) {
638 if (setlocale(LC_ALL, ""))
639 done = TRUE;
640 else
641 setlocale_failure = TRUE;
642 }
0644c9cb 643 if (!setlocale_failure) {
02b32252 644#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 645 if (! (curctype =
646 setlocale(LC_CTYPE,
647 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
02b32252
CS		 648 ? "" : Nullch)))
649 setlocale_failure = TRUE;
650#endif /* USE_LOCALE_CTYPE */
651#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 652 if (! (curcoll =
653 setlocale(LC_COLLATE,
654 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
02b32252
CS		 655 ? "" : Nullch)))
656 setlocale_failure = TRUE;
657#endif /* USE_LOCALE_COLLATE */
658#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 659 if (! (curnum =
660 setlocale(LC_NUMERIC,
661 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
02b32252
CS		 662 ? "" : Nullch)))
663 setlocale_failure = TRUE;
664#endif /* USE_LOCALE_NUMERIC */
665 }
666
0644c9cb 667#endif /* LC_ALL */
02b32252 668
0644c9cb 669#endif /* !LOCALE_ENVIRON_REQUIRED */
5f05dabc 670
0644c9cb 671#ifdef LC_ALL
bbce6d69 672 if (! setlocale(LC_ALL, ""))
673 setlocale_failure = TRUE;
0644c9cb 674#endif /* LC_ALL */
bbce6d69 675
0644c9cb 676 if (!setlocale_failure) {
36477c24 677#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 678 if (! (curctype = setlocale(LC_CTYPE, "")))
679 setlocale_failure = TRUE;
36477c24 680#endif /* USE_LOCALE_CTYPE */
681#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 682 if (! (curcoll = setlocale(LC_COLLATE, "")))
683 setlocale_failure = TRUE;
36477c24 684#endif /* USE_LOCALE_COLLATE */
685#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 686 if (! (curnum = setlocale(LC_NUMERIC, "")))
687 setlocale_failure = TRUE;
36477c24 688#endif /* USE_LOCALE_NUMERIC */
0644c9cb 689 }
02b32252 690
5f05dabc 691 if (setlocale_failure) {
692 char *p;
693 bool locwarn = (printwarn > 1 ||
694 printwarn &&
76e3520e 695 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)));
20cec16a 696
5f05dabc 697 if (locwarn) {
698#ifdef LC_ALL
699
700 PerlIO_printf(PerlIO_stderr(),
701 "perl: warning: Setting locale failed.\n");
702
703#else /* !LC_ALL */
704
ef7eada9 705 PerlIO_printf(PerlIO_stderr(),
bbce6d69 706 "perl: warning: Setting locale failed for the categories:\n\t");
36477c24 707#ifdef USE_LOCALE_CTYPE
bbce6d69 708 if (! curctype)
5f05dabc 709 PerlIO_printf(PerlIO_stderr(), "LC_CTYPE ");
36477c24 710#endif /* USE_LOCALE_CTYPE */
711#ifdef USE_LOCALE_COLLATE
bbce6d69 712 if (! curcoll)
5f05dabc 713 PerlIO_printf(PerlIO_stderr(), "LC_COLLATE ");
36477c24 714#endif /* USE_LOCALE_COLLATE */
715#ifdef USE_LOCALE_NUMERIC
bbce6d69 716 if (! curnum)
5f05dabc 717 PerlIO_printf(PerlIO_stderr(), "LC_NUMERIC ");
36477c24 718#endif /* USE_LOCALE_NUMERIC */
bbce6d69 719 PerlIO_printf(PerlIO_stderr(), "\n");
720
5f05dabc 721#endif /* LC_ALL */
722
760ac839 723 PerlIO_printf(PerlIO_stderr(),
bbce6d69 724 "perl: warning: Please check that your locale settings:\n");
ef7eada9 725
3aeabbed
JH		 726#ifdef __GLIBC__
727 PerlIO_printf(PerlIO_stderr(),
728 "\tLANGUAGE = %c%s%c,\n",
729 language ? '"' : '(',
730 language ? language : "unset",
731 language ? '"' : ')');
732#endif
733
ef7eada9 734 PerlIO_printf(PerlIO_stderr(),
bbce6d69 735 "\tLC_ALL = %c%s%c,\n",
736 lc_all ? '"' : '(',
737 lc_all ? lc_all : "unset",
738 lc_all ? '"' : ')');
5f05dabc 739
740 {
741 char **e;
742 for (e = environ; *e; e++) {
743 if (strnEQ(*e, "LC_", 3)
744 && strnNE(*e, "LC_ALL=", 7)
745 && (p = strchr(*e, '=')))
746 PerlIO_printf(PerlIO_stderr(), "\t%.*s = \"%s\",\n",
fb73857a 747 (int)(p - *e), *e, p + 1);
5f05dabc 748 }
749 }
750
ef7eada9 751 PerlIO_printf(PerlIO_stderr(),
bbce6d69 752 "\tLANG = %c%s%c\n",
5f05dabc 753 lang ? '"' : '(',
bbce6d69 754 lang ? lang : "unset",
755 lang ? '"' : ')');
ef7eada9 756
bbce6d69 757 PerlIO_printf(PerlIO_stderr(),
758 " are supported and installed on your system.\n");
5f05dabc 759 }
ef7eada9 760
5f05dabc 761#ifdef LC_ALL
762
763 if (setlocale(LC_ALL, "C")) {
764 if (locwarn)
765 PerlIO_printf(PerlIO_stderr(),
766 "perl: warning: Falling back to the standard locale (\"C\").\n");
bbce6d69 767 ok = 0;
ef7eada9 768 }
5f05dabc 769 else {
770 if (locwarn)
771 PerlIO_printf(PerlIO_stderr(),
772 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
773 ok = -1;
774 }
bbce6d69 775
5f05dabc 776#else /* ! LC_ALL */
777
778 if (0
36477c24 779#ifdef USE_LOCALE_CTYPE
5f05dabc 780 || !(curctype || setlocale(LC_CTYPE, "C"))
36477c24 781#endif /* USE_LOCALE_CTYPE */
782#ifdef USE_LOCALE_COLLATE
5f05dabc 783 || !(curcoll || setlocale(LC_COLLATE, "C"))
36477c24 784#endif /* USE_LOCALE_COLLATE */
785#ifdef USE_LOCALE_NUMERIC
5f05dabc 786 || !(curnum || setlocale(LC_NUMERIC, "C"))
36477c24 787#endif /* USE_LOCALE_NUMERIC */
5f05dabc 788 )
789 {
790 if (locwarn)
bbce6d69 791 PerlIO_printf(PerlIO_stderr(),
5f05dabc 792 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
793 ok = -1;
bbce6d69 794 }
5f05dabc 795
bbce6d69 796#endif /* ! LC_ALL */
5f05dabc 797
798#ifdef USE_LOCALE_CTYPE
799 curctype = setlocale(LC_CTYPE, Nullch);
800#endif /* USE_LOCALE_CTYPE */
801#ifdef USE_LOCALE_COLLATE
802 curcoll = setlocale(LC_COLLATE, Nullch);
803#endif /* USE_LOCALE_COLLATE */
804#ifdef USE_LOCALE_NUMERIC
805 curnum = setlocale(LC_NUMERIC, Nullch);
806#endif /* USE_LOCALE_NUMERIC */
ef7eada9
JH		 807 }
808
36477c24 809#ifdef USE_LOCALE_CTYPE
864dbfa3 810 new_ctype(curctype);
36477c24 811#endif /* USE_LOCALE_CTYPE */
bbce6d69 812
36477c24 813#ifdef USE_LOCALE_COLLATE
864dbfa3 814 new_collate(curcoll);
36477c24 815#endif /* USE_LOCALE_COLLATE */
bbce6d69 816
36477c24 817#ifdef USE_LOCALE_NUMERIC
864dbfa3 818 new_numeric(curnum);
36477c24 819#endif /* USE_LOCALE_NUMERIC */
ef7eada9 820
36477c24 821#endif /* USE_LOCALE */
ef7eada9 822
f0c5b223
TB		 823 return ok;
824}
825
bbce6d69 826/* Backwards compatibility. */
827int
864dbfa3 828Perl_init_i18nl14n(pTHX_ int printwarn)
bbce6d69 829{
864dbfa3 830 return init_i18nl10n(printwarn);
bbce6d69 831}
ef7eada9 832
36477c24 833#ifdef USE_LOCALE_COLLATE
ef7eada9 834
bbce6d69 835/*
836 * mem_collxfrm() is a bit like strxfrm() but with two important
837 * differences. First, it handles embedded NULs. Second, it allocates
838 * a bit more memory than needed for the transformed data itself.
839 * The real transformed data begins at offset sizeof(collationix).
840 * Please see sv_collxfrm() to see how this is used.
841 */
842char *
864dbfa3 843Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
bbce6d69 844{
845 char *xbuf;
76e3520e 846 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
bbce6d69 847
848 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
849 /* the +1 is for the terminating NUL. */
850
3280af22 851 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
76e3520e 852 New(171, xbuf, xAlloc, char);
bbce6d69 853 if (! xbuf)
854 goto bad;
855
3280af22
NIS		 856 *(U32*)xbuf = PL_collation_ix;
857 xout = sizeof(PL_collation_ix);
bbce6d69 858 for (xin = 0; xin < len; ) {
859 SSize_t xused;
860
861 for (;;) {
76e3520e 862 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
bbce6d69 863 if (xused == -1)
864 goto bad;
76e3520e 865 if (xused < xAlloc - xout)
bbce6d69 866 break;
76e3520e
GS		 867 xAlloc = (2 * xAlloc) + 1;
868 Renew(xbuf, xAlloc, char);
bbce6d69 869 if (! xbuf)
870 goto bad;
871 }
ef7eada9 872
bbce6d69 873 xin += strlen(s + xin) + 1;
874 xout += xused;
875
876 /* Embedded NULs are understood but silently skipped
877 * because they make no sense in locale collation. */
878 }
ef7eada9 879
bbce6d69 880 xbuf[xout] = '\0';
3280af22 881 *xlen = xout - sizeof(PL_collation_ix);
bbce6d69 882 return xbuf;
883
884 bad:
885 Safefree(xbuf);
886 *xlen = 0;
887 return NULL;
ef7eada9
JH		 888}
889
36477c24 890#endif /* USE_LOCALE_COLLATE */
bbce6d69 891
cf93c79d
IZ		 892#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
893
894/* As a space optimization, we do not compile tables for strings of length
895 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
896 special-cased in fbm_instr().
897
898 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
899
378cc40b 900void
864dbfa3 901Perl_fbm_compile(pTHX_ SV *sv, U32 flags /* not used yet */)
378cc40b 902{
942e002e
GS		 903 register U8 *s;
904 register U8 *table;
79072805 905 register U32 i;
0b71040e 906 STRLEN len;
79072805
LW		 907 I32 rarest = 0;
908 U32 frequency = 256;
909
cf93c79d
IZ		 910 if (flags & FBMcf_TAIL)
911 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
942e002e 912 s = (U8*)SvPV_force(sv, len);
07f14f54 913 (void)SvUPGRADE(sv, SVt_PVBM);
cf93c79d
IZ		 914 if (len == 0) /* TAIL might be on on a zero-length string. */
915 return;
02128f11 916 if (len > 2) {
cf93c79d
IZ		 917 I32 mlen = len;
918 unsigned char *sb;
919
920 if (mlen > 255)
921 mlen = 255;
922 Sv_Grow(sv,len + 256 + FBM_TABLE_OFFSET);
923 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
924 s = table - 1 - FBM_TABLE_OFFSET; /* Last char */
02128f11 925 for (i = 0; i < 256; i++) {
cf93c79d 926 table[i] = mlen;
02128f11 927 }
cf93c79d 928 table[-1] = flags; /* Not used yet */
02128f11 929 i = 0;
cf93c79d
IZ		 930 sb = s - mlen;
931 while (s >= sb) {
932 if (table[*s] == mlen)
933 table[*s] = i;
934 s--, i++;
935 }
378cc40b 936 }
bbce6d69 937 sv_magic(sv, Nullsv, 'B', Nullch, 0); /* deep magic */
79072805 938 SvVALID_on(sv);
378cc40b 939
463ee0b2 940 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
bbce6d69 941 for (i = 0; i < len; i++) {
22c35a8c 942 if (PL_freq[s[i]] < frequency) {
bbce6d69 943 rarest = i;
22c35a8c 944 frequency = PL_freq[s[i]];
378cc40b
LW		 945 }
946 }
79072805
LW		 947 BmRARE(sv) = s[rarest];
948 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ		 949 BmUSEFUL(sv) = 100; /* Initial value */
950 if (flags & FBMcf_TAIL)
951 SvTAIL_on(sv);
760ac839 952 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 953}
954
cf93c79d
IZ		 955/* If SvTAIL(littlestr), it has a fake '\n' at end. */
956/* If SvTAIL is actually due to \Z or \z, this gives false positives
957 if multiline */
958
378cc40b 959char *
864dbfa3 960Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 961{
a687059c 962 register unsigned char *s;
cf93c79d
IZ		 963 STRLEN l;
964 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
965 register STRLEN littlelen = l;
966 register I32 multiline = flags & FBMrf_MULTILINE;
967
968 if (bigend - big < littlelen) {
969 check_tail:
970 if ( SvTAIL(littlestr)
971 && (bigend - big == littlelen - 1)
972 && (littlelen == 1
973 || *big == *little && memEQ(big, little, littlelen - 1)))
974 return (char*)big;
975 return Nullch;
976 }
378cc40b 977
cf93c79d
IZ		 978 if (littlelen <= 2) { /* Special-cased */
979 register char c;
980
981 if (littlelen == 1) {
982 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
983 /* Know that bigend != big. */
984 if (bigend[-1] == '\n')
985 return (char *)(bigend - 1);
986 return (char *) bigend;
987 }
988 s = big;
989 while (s < bigend) {
990 if (*s == *little)
991 return (char *)s;
992 s++;
993 }
994 if (SvTAIL(littlestr))
995 return (char *) bigend;
996 return Nullch;
997 }
998 if (!littlelen)
999 return (char*)big; /* Cannot be SvTAIL! */
1000
1001 /* littlelen is 2 */
1002 if (SvTAIL(littlestr) && !multiline) {
1003 if (bigend[-1] == '\n' && bigend[-2] == *little)
1004 return (char*)bigend - 2;
1005 if (bigend[-1] == *little)
1006 return (char*)bigend - 1;
1007 return Nullch;
1008 }
1009 {
1010 /* This should be better than FBM if c1 == c2, and almost
1011 as good otherwise: maybe better since we do less indirection.
1012 And we save a lot of memory by caching no table. */
1013 register unsigned char c1 = little[0];
1014 register unsigned char c2 = little[1];
1015
1016 s = big + 1;
1017 bigend--;
1018 if (c1 != c2) {
1019 while (s <= bigend) {
1020 if (s[0] == c2) {
1021 if (s[-1] == c1)
1022 return (char*)s - 1;
1023 s += 2;
1024 continue;
3fe6f2dc 1025 }
cf93c79d
IZ		 1026 next_chars:
1027 if (s[0] == c1) {
1028 if (s == bigend)
1029 goto check_1char_anchor;
1030 if (s[1] == c2)
1031 return (char*)s;
1032 else {
1033 s++;
1034 goto next_chars;
1035 }
1036 }
1037 else
1038 s += 2;
1039 }
1040 goto check_1char_anchor;
1041 }
1042 /* Now c1 == c2 */
1043 while (s <= bigend) {
1044 if (s[0] == c1) {
1045 if (s[-1] == c1)
1046 return (char*)s - 1;
1047 if (s == bigend)
1048 goto check_1char_anchor;
1049 if (s[1] == c1)
1050 return (char*)s;
1051 s += 3;
02128f11 1052 }
c277df42 1053 else
cf93c79d 1054 s += 2;
c277df42 1055 }
c277df42 1056 }
cf93c79d
IZ		 1057 check_1char_anchor: /* One char and anchor! */
1058 if (SvTAIL(littlestr) && (*bigend == *little))
1059 return (char *)bigend; /* bigend is already decremented. */
1060 return Nullch;
d48672a2 1061 }
cf93c79d 1062 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 1063 s = bigend - littlelen;
cf93c79d 1064 if (s >= big
02128f11 1065 && bigend[-1] == '\n'
cf93c79d
IZ		 1066 && *s == *little
1067 /* Automatically of length > 2 */
1068 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
bbce6d69 1069 return (char*)s; /* how sweet it is */
cf93c79d
IZ		 1070 if (s[1] == *little && memEQ((char*)s + 2,(char*)little + 1,
1071 littlelen - 2))
1072 return (char*)s + 1; /* how sweet it is */
02128f11
IZ		 1073 return Nullch;
1074 }
cf93c79d
IZ		 1075 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
1076 char *b = ninstr((char*)big,(char*)bigend,
1077 (char*)little, (char*)little + littlelen);
1078
1079 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
1080 /* Chop \n from littlestr: */
1081 s = bigend - littlelen + 1;
1082 if (*s == *little && memEQ((char*)s + 1, (char*)little + 1,
1083 littlelen - 2))
3fe6f2dc 1084 return (char*)s;
cf93c79d 1085 return Nullch;
a687059c 1086 }
cf93c79d 1087 return b;
a687059c 1088 }
cf93c79d
IZ		 1089
1090 { /* Do actual FBM. */
1091 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
1092 register unsigned char *oldlittle;
1093
1094 if (littlelen > bigend - big)
1095 return Nullch;
1096 --littlelen; /* Last char found by table lookup */
1097
1098 s = big + littlelen;
1099 little += littlelen; /* last char */
1100 oldlittle = little;
1101 if (s < bigend) {
1102 register I32 tmp;
1103
1104 top2:
1105 /*SUPPRESS 560*/
1106 if (tmp = table[*s]) {
62b28dd9 1107#ifdef POINTERRIGOR
cf93c79d
IZ		 1108 if (bigend - s > tmp) {
1109 s += tmp;
1110 goto top2;
1111 }
bbce6d69 1112 s += tmp;
62b28dd9 1113#else
cf93c79d 1114 if ((s += tmp) < bigend)
62b28dd9 1115 goto top2;
cf93c79d
IZ		 1116#endif
1117 goto check_end;
1118 }
1119 else { /* less expensive than calling strncmp() */
1120 register unsigned char *olds = s;
1121
1122 tmp = littlelen;
1123
1124 while (tmp--) {
1125 if (*--s == *--little)
1126 continue;
1127 differ:
1128 s = olds + 1; /* here we pay the price for failure */
1129 little = oldlittle;
1130 if (s < bigend) /* fake up continue to outer loop */
1131 goto top2;
1132 goto check_end;
1133 }
1134 return (char *)s;
a687059c 1135 }
378cc40b 1136 }
cf93c79d
IZ		 1137 check_end:
1138 if ( s == bigend && (table[-1] & FBMcf_TAIL)
1139 && memEQ(bigend - littlelen, oldlittle - littlelen, littlelen) )
1140 return (char*)bigend - littlelen;
1141 return Nullch;
378cc40b 1142 }
378cc40b
LW		 1143}
1144
c277df42
IZ		 1145/* start_shift, end_shift are positive quantities which give offsets
1146 of ends of some substring of bigstr.
1147 If `last' we want the last occurence.
1148 old_posp is the way of communication between consequent calls if
1149 the next call needs to find the .
1150 The initial *old_posp should be -1.
cf93c79d
IZ		 1151
1152 Note that we take into account SvTAIL, so one can get extra
1153 optimizations if _ALL flag is set.
c277df42
IZ		 1154 */
1155
cf93c79d
IZ		 1156/* If SvTAIL is actually due to \Z or \z, this gives false positives
1157 if PL_multiline. In fact if !PL_multiline the autoritative answer
1158 is not supported yet. */
1159
378cc40b 1160char *
864dbfa3 1161Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 1162{
5c0ca799 1163 dTHR;
a687059c
LW		 1164 register unsigned char *s, *x;
1165 register unsigned char *big;
79072805
LW		 1166 register I32 pos;
1167 register I32 previous;
1168 register I32 first;
a687059c 1169 register unsigned char *little;
c277df42 1170 register I32 stop_pos;
a687059c 1171 register unsigned char *littleend;
c277df42 1172 I32 found = 0;
378cc40b 1173
c277df42 1174 if (*old_posp == -1
3280af22 1175 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 1176 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
1177 cant_find:
1178 if ( BmRARE(littlestr) == '\n'
1179 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
1180 little = (unsigned char *)(SvPVX(littlestr));
1181 littleend = little + SvCUR(littlestr);
1182 first = *little++;
1183 goto check_tail;
1184 }
378cc40b 1185 return Nullch;
cf93c79d
IZ		 1186 }
1187
463ee0b2 1188 little = (unsigned char *)(SvPVX(littlestr));
79072805 1189 littleend = little + SvCUR(littlestr);
378cc40b 1190 first = *little++;
c277df42 1191 /* The value of pos we can start at: */
79072805 1192 previous = BmPREVIOUS(littlestr);
463ee0b2 1193 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ		 1194 /* The value of pos we can stop at: */
1195 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d
IZ		 1196 if (previous + start_shift > stop_pos) {
1197 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
1198 goto check_tail;
1199 return Nullch;
1200 }
c277df42 1201 while (pos < previous + start_shift) {
3280af22 1202 if (!(pos += PL_screamnext[pos]))
cf93c79d 1203 goto cant_find;
378cc40b 1204 }
de3bb511 1205#ifdef POINTERRIGOR
bbce6d69 1206 do {
ef64f398 1207 if (pos >= stop_pos) break;
bbce6d69 1208 if (big[pos-previous] != first)
1209 continue;
1210 for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) {
bbce6d69 1211 if (*s++ != *x++) {
1212 s--;
1213 break;
de3bb511 1214 }
bbce6d69 1215 }
c277df42
IZ		 1216 if (s == littleend) {
1217 *old_posp = pos;
1218 if (!last) return (char *)(big+pos-previous);
1219 found = 1;
1220 }
6b88bc9c 1221 } while ( pos += PL_screamnext[pos] );
c277df42 1222 return (last && found) ? (char *)(big+(*old_posp)-previous) : Nullch;
de3bb511
LW		 1223#else /* !POINTERRIGOR */
1224 big -= previous;
bbce6d69 1225 do {
ef64f398 1226 if (pos >= stop_pos) break;
bbce6d69 1227 if (big[pos] != first)
1228 continue;
1229 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 1230 if (*s++ != *x++) {
1231 s--;
1232 break;
378cc40b 1233 }
bbce6d69 1234 }
c277df42
IZ		 1235 if (s == littleend) {
1236 *old_posp = pos;
1237 if (!last) return (char *)(big+pos);
1238 found = 1;
1239 }
3280af22 1240 } while ( pos += PL_screamnext[pos] );
cf93c79d
IZ		 1241 if (last && found)
1242 return (char *)(big+(*old_posp));
de3bb511 1243#endif /* POINTERRIGOR */
cf93c79d
IZ		 1244 check_tail:
1245 if (!SvTAIL(littlestr) || (end_shift > 0))
1246 return Nullch;
1247 /* Ignore the trailing "\n". This code is not microoptimized */
1248 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
1249 stop_pos = littleend - little; /* Actual littlestr len */
1250 if (stop_pos == 0)
1251 return (char*)big;
1252 big -= stop_pos;
1253 if (*big == first
1254 && ((stop_pos == 1) || memEQ(big + 1, little, stop_pos - 1)))
1255 return (char*)big;
1256 return Nullch;
8d063cd8
LW		 1257}
1258
79072805 1259I32
864dbfa3 1260Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 1261{
bbce6d69 1262 register U8 *a = (U8 *)s1;
1263 register U8 *b = (U8 *)s2;
79072805 1264 while (len--) {
22c35a8c 1265 if (*a != *b && *a != PL_fold[*b])
bbce6d69 1266 return 1;
1267 a++,b++;
1268 }
1269 return 0;
1270}
1271
1272I32
864dbfa3 1273Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 1274{
1275 register U8 *a = (U8 *)s1;
1276 register U8 *b = (U8 *)s2;
1277 while (len--) {
22c35a8c 1278 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 1279 return 1;
1280 a++,b++;
79072805
LW		 1281 }
1282 return 0;
1283}
1284
8d063cd8
LW		 1285/* copy a string to a safe spot */
1286
1287char *
864dbfa3 1288Perl_savepv(pTHX_ const char *sv)
8d063cd8 1289{
a687059c 1290 register char *newaddr;
8d063cd8 1291
79072805
LW		 1292 New(902,newaddr,strlen(sv)+1,char);
1293 (void)strcpy(newaddr,sv);
8d063cd8
LW		 1294 return newaddr;
1295}
1296
a687059c
LW		 1297/* same thing but with a known length */
1298
1299char *
864dbfa3 1300Perl_savepvn(pTHX_ const char *sv, register I32 len)
a687059c
LW		 1301{
1302 register char *newaddr;
1303
1304 New(903,newaddr,len+1,char);
79072805 1305 Copy(sv,newaddr,len,char); /* might not be null terminated */
a687059c
LW		 1306 newaddr[len] = '\0'; /* is now */
1307 return newaddr;
1308}
1309
cea2e8a9 1310/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1311
76e3520e 1312STATIC SV *
cea2e8a9 1313S_mess_alloc(pTHX)
fc36a67e 1314{
e72dc28c 1315 dTHR;
fc36a67e 1316 SV *sv;
1317 XPVMG *any;
1318
e72dc28c
GS		 1319 if (!PL_dirty)
1320 return sv_2mortal(newSVpvn("",0));
1321
0372dbb6
GS		 1322 if (PL_mess_sv)
1323 return PL_mess_sv;
1324
fc36a67e 1325 /* Create as PVMG now, to avoid any upgrading later */
1326 New(905, sv, 1, SV);
1327 Newz(905, any, 1, XPVMG);
1328 SvFLAGS(sv) = SVt_PVMG;
1329 SvANY(sv) = (void*)any;
1330 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1331 PL_mess_sv = sv;
fc36a67e 1332 return sv;
1333}
1334
cea2e8a9
GS		 1335#ifdef PERL_IMPLICIT_CONTEXT
1336char *
1337Perl_form_nocontext(const char* pat, ...)
1338{
1339 dTHX;
1340 SV *sv = mess_alloc();
1341 va_list args;
1342 va_start(args, pat);
1343 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
1344 va_end(args);
1345 return SvPVX(sv);
1346}
1347#endif
1348
8990e307 1349char *
864dbfa3 1350Perl_form(pTHX_ const char* pat, ...)
8990e307 1351{
e72dc28c 1352 SV *sv = mess_alloc();
46fc3d4c 1353 va_list args;
46fc3d4c 1354 va_start(args, pat);
e72dc28c 1355 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
46fc3d4c 1356 va_end(args);
e72dc28c 1357 return SvPVX(sv);
46fc3d4c 1358}
a687059c 1359
06bf62c7 1360SV *
864dbfa3 1361Perl_mess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1362{
e72dc28c 1363 SV *sv = mess_alloc();
46fc3d4c 1364 static char dgd[] = " during global destruction.\n";
1365
fc36a67e 1366 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1367 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
e858de61 1368 dTHR;
515f54a1 1369 if (PL_curcop->cop_line)
cea2e8a9 1370 Perl_sv_catpvf(aTHX_ sv, " at %_ line %ld",
515f54a1
GS		 1371 GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
1372 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1373 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1374 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
cea2e8a9 1375 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %ld",
515f54a1
GS		 1376 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1377 line_mode ? "line" : "chunk",
1378 (long)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1379 }
515f54a1 1380 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1381 }
06bf62c7 1382 return sv;
a687059c
LW		 1383}
1384
cea2e8a9
GS		 1385static OP *
1386do_die(pTHX_ const char* pat, va_list *args)
36477c24 1387{
5dc0d613 1388 dTHR;
36477c24 1389 char *message;
3280af22 1390 int was_in_eval = PL_in_eval;
36477c24 1391 HV *stash;
1392 GV *gv;
1393 CV *cv;
06bf62c7
GS		 1394 SV *msv;
1395 STRLEN msglen;
36477c24 1396
8b73bbec 1397 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1398 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1399 thr, PL_curstack, PL_mainstack));
36477c24 1400
06bf62c7 1401 if (pat) {
cea2e8a9 1402 msv = mess(pat, args);
06bf62c7
GS		 1403 message = SvPV(msv,msglen);
1404 }
1405 else {
1406 message = Nullch;
1407 }
36477c24 1408
8b73bbec 1409 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1410 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1411 thr, message, PL_diehook));
3280af22 1412 if (PL_diehook) {
cea2e8a9 1413 /* sv_2cv might call Perl_croak() */
3280af22 1414 SV *olddiehook = PL_diehook;
1738f5c4 1415 ENTER;
3280af22
NIS		 1416 SAVESPTR(PL_diehook);
1417 PL_diehook = Nullsv;
1738f5c4
CS		 1418 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1419 LEAVE;
1420 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1421 dSP;
774d564b 1422 SV *msg;
1423
1424 ENTER;
79cb57f6 1425 if (message) {
06bf62c7 1426 msg = newSVpvn(message, msglen);
4e6ea2c3
GS		 1427 SvREADONLY_on(msg);
1428 SAVEFREESV(msg);
1429 }
1430 else {
1431 msg = ERRSV;
1432 }
1738f5c4 1433
e788e7d3 1434 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1435 PUSHMARK(SP);
1738f5c4
CS		 1436 XPUSHs(msg);
1437 PUTBACK;
864dbfa3 1438 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1439 POPSTACK;
774d564b 1440 LEAVE;
1738f5c4 1441 }
36477c24 1442 }
1443
06bf62c7 1444 PL_restartop = die_where(message, msglen);
8b73bbec 1445 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
7c06b590 1446 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1447 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1448 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1449 JMPENV_JUMP(3);
3280af22 1450 return PL_restartop;
36477c24 1451}
1452
cea2e8a9
GS		 1453#ifdef PERL_IMPLICIT_CONTEXT
1454OP *
1455Perl_die_nocontext(const char* pat, ...)
a687059c 1456{
cea2e8a9
GS		 1457 dTHX;
1458 OP *o;
a687059c 1459 va_list args;
cea2e8a9
GS		 1460 va_start(args, pat);
1461 o = do_die(aTHX_ pat, &args);
1462 va_end(args);
1463 return o;
1464}
1465#endif
1466
1467OP *
1468Perl_die(pTHX_ const char* pat, ...)
1469{
1470 OP *o;
1471 va_list args;
1472 va_start(args, pat);
1473 o = do_die(aTHX_ pat, &args);
1474 va_end(args);
1475 return o;
1476}
1477
1478STATIC void
1479S_do_croak(pTHX_ const char* pat, va_list *args)
1480{
1481 dTHR;
de3bb511 1482 char *message;
748a9306
LW		 1483 HV *stash;
1484 GV *gv;
1485 CV *cv;
06bf62c7
GS		 1486 SV *msv;
1487 STRLEN msglen;
a687059c 1488
cea2e8a9 1489 msv = mess(pat, args);
06bf62c7 1490 message = SvPV(msv,msglen);
8b73bbec 1491 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
3280af22 1492 if (PL_diehook) {
cea2e8a9 1493 /* sv_2cv might call Perl_croak() */
3280af22 1494 SV *olddiehook = PL_diehook;
1738f5c4 1495 ENTER;
3280af22
NIS		 1496 SAVESPTR(PL_diehook);
1497 PL_diehook = Nullsv;
20cec16a 1498 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS		 1499 LEAVE;
1500 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1501 dSP;
774d564b 1502 SV *msg;
1503
1504 ENTER;
06bf62c7 1505 msg = newSVpvn(message, msglen);
774d564b 1506 SvREADONLY_on(msg);
1507 SAVEFREESV(msg);
20cec16a 1508
e788e7d3 1509 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1510 PUSHMARK(SP);
1738f5c4 1511 XPUSHs(msg);
20cec16a 1512 PUTBACK;
864dbfa3 1513 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1514 POPSTACK;
774d564b 1515 LEAVE;
20cec16a 1516 }
748a9306 1517 }
3280af22 1518 if (PL_in_eval) {
06bf62c7 1519 PL_restartop = die_where(message, msglen);
6224f72b 1520 JMPENV_JUMP(3);
a0d0e21e 1521 }
d175a3f0
GS		 1522 {
1523#ifdef USE_SFIO
1524 /* SFIO can really mess with your errno */
1525 int e = errno;
1526#endif
06bf62c7 1527 PerlIO_write(PerlIO_stderr(), message, msglen);
d175a3f0
GS		 1528 (void)PerlIO_flush(PerlIO_stderr());
1529#ifdef USE_SFIO
1530 errno = e;
1531#endif
1532 }
f86702cc 1533 my_failure_exit();
a687059c
LW		 1534}
1535
cea2e8a9 1536#ifdef PERL_IMPLICIT_CONTEXT
8990e307 1537void
cea2e8a9 1538Perl_croak_nocontext(const char *pat, ...)
a687059c 1539{
cea2e8a9 1540 dTHX;
a687059c 1541 va_list args;
cea2e8a9
GS		 1542 va_start(args, pat);
1543 do_croak(pat, &args);
1544 /* NOTREACHED */
1545 va_end(args);
1546}
1547#endif /* PERL_IMPLICIT_CONTEXT */
1548
1549void
1550Perl_croak(pTHX_ const char *pat, ...)
1551{
1552 va_list args;
1553 va_start(args, pat);
1554 do_croak(pat, &args);
1555 /* NOTREACHED */
1556 va_end(args);
1557}
1558
1559STATIC void
1560S_do_warn(pTHX_ const char* pat, va_list *args)
1561{
de3bb511 1562 char *message;
748a9306
LW		 1563 HV *stash;
1564 GV *gv;
1565 CV *cv;
06bf62c7
GS		 1566 SV *msv;
1567 STRLEN msglen;
a687059c 1568
cea2e8a9 1569 msv = mess(pat, args);
06bf62c7 1570 message = SvPV(msv, msglen);
a687059c 1571
3280af22 1572 if (PL_warnhook) {
cea2e8a9 1573 /* sv_2cv might call Perl_warn() */
11343788 1574 dTHR;
3280af22 1575 SV *oldwarnhook = PL_warnhook;
1738f5c4 1576 ENTER;
3280af22
NIS		 1577 SAVESPTR(PL_warnhook);
1578 PL_warnhook = Nullsv;
20cec16a 1579 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1580 LEAVE;
1581 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1582 dSP;
774d564b 1583 SV *msg;
1584
1585 ENTER;
06bf62c7 1586 msg = newSVpvn(message, msglen);
774d564b 1587 SvREADONLY_on(msg);
1588 SAVEFREESV(msg);
1589
e788e7d3 1590 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1591 PUSHMARK(SP);
774d564b 1592 XPUSHs(msg);
20cec16a 1593 PUTBACK;
864dbfa3 1594 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1595 POPSTACK;
774d564b 1596 LEAVE;
20cec16a 1597 return;
1598 }
748a9306 1599 }
06bf62c7 1600 PerlIO_write(PerlIO_stderr(), message, msglen);
a687059c 1601#ifdef LEAKTEST
8c52afec
IZ		 1602 DEBUG_L(*message == '!'
1603 ? (xstat(message[1]=='!'
1604 ? (message[2]=='!' ? 2 : 1)
1605 : 0)
1606 , 0)
1607 : 0);
a687059c 1608#endif
20cec16a 1609 (void)PerlIO_flush(PerlIO_stderr());
a687059c 1610}
8d063cd8 1611
cea2e8a9
GS		 1612#ifdef PERL_IMPLICIT_CONTEXT
1613void
1614Perl_warn_nocontext(const char *pat, ...)
1615{
1616 dTHX;
1617 va_list args;
1618 va_start(args, pat);
1619 do_warn(pat, &args);
1620 va_end(args);
1621}
1622#endif /* PERL_IMPLICIT_CONTEXT */
1623
1624void
1625Perl_warn(pTHX_ const char *pat, ...)
1626{
1627 va_list args;
1628 va_start(args, pat);
1629 do_warn(pat, &args);
1630 va_end(args);
1631}
1632
599cee73 1633void
864dbfa3 1634Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73 1635{
d008e5eb 1636 dTHR;
599cee73
PM		 1637 va_list args;
1638 char *message;
1639 HV *stash;
1640 GV *gv;
1641 CV *cv;
06bf62c7
GS		 1642 SV *msv;
1643 STRLEN msglen;
599cee73
PM		 1644
1645 va_start(args, pat);
06bf62c7
GS		 1646 msv = mess(pat, &args);
1647 message = SvPV(msv, msglen);
599cee73
PM		 1648 va_end(args);
1649
1650 if (ckDEAD(err)) {
1651#ifdef USE_THREADS
d008e5eb 1652 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
599cee73
PM		 1653#endif /* USE_THREADS */
1654 if (PL_diehook) {
cea2e8a9 1655 /* sv_2cv might call Perl_croak() */
599cee73
PM		 1656 SV *olddiehook = PL_diehook;
1657 ENTER;
1658 SAVESPTR(PL_diehook);
1659 PL_diehook = Nullsv;
1660 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1661 LEAVE;
1662 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1663 dSP;
1664 SV *msg;
1665
1666 ENTER;
06bf62c7 1667 msg = newSVpvn(message, msglen);
599cee73
PM		 1668 SvREADONLY_on(msg);
1669 SAVEFREESV(msg);
1670
1671 PUSHMARK(sp);
1672 XPUSHs(msg);
1673 PUTBACK;
864dbfa3 1674 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1675
1676 LEAVE;
1677 }
1678 }
1679 if (PL_in_eval) {
06bf62c7 1680 PL_restartop = die_where(message, msglen);
599cee73
PM		 1681 JMPENV_JUMP(3);
1682 }
06bf62c7 1683 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1684 (void)PerlIO_flush(PerlIO_stderr());
1685 my_failure_exit();
1686
1687 }
1688 else {
1689 if (PL_warnhook) {
cea2e8a9 1690 /* sv_2cv might call Perl_warn() */
599cee73
PM		 1691 dTHR;
1692 SV *oldwarnhook = PL_warnhook;
1693 ENTER;
1694 SAVESPTR(PL_warnhook);
1695 PL_warnhook = Nullsv;
1696 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1697 LEAVE;
1698 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1699 dSP;
1700 SV *msg;
1701
1702 ENTER;
06bf62c7 1703 msg = newSVpvn(message, msglen);
599cee73
PM		 1704 SvREADONLY_on(msg);
1705 SAVEFREESV(msg);
1706
1707 PUSHMARK(sp);
1708 XPUSHs(msg);
1709 PUTBACK;
864dbfa3 1710 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1711
1712 LEAVE;
1713 return;
1714 }
1715 }
06bf62c7 1716 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1717#ifdef LEAKTEST
1718 DEBUG_L(xstat());
1719#endif
1720 (void)PerlIO_flush(PerlIO_stderr());
1721 }
1722}
1723
a0d0e21e 1724#ifndef VMS /* VMS' my_setenv() is in VMS.c */
f89d6eaa 1725#if !defined(WIN32) && !defined(CYGWIN32)
8d063cd8 1726void
864dbfa3 1727Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1728{
f2517201
GS		 1729#ifndef PERL_USE_SAFE_PUTENV
1730 /* most putenv()s leak, so we manipulate environ directly */
79072805 1731 register I32 i=setenv_getix(nam); /* where does it go? */
8d063cd8 1732
3280af22 1733 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1734 I32 j;
1735 I32 max;
fe14fcc3
LW		 1736 char **tmpenv;
1737
de3bb511 1738 /*SUPPRESS 530*/
fe14fcc3 1739 for (max = i; environ[max]; max++) ;
f2517201
GS		 1740 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1741 for (j=0; j<max; j++) { /* copy environment */
1742 tmpenv[j] = (char*)safesysmalloc((strlen(environ[j])+1)*sizeof(char));
1743 strcpy(tmpenv[j], environ[j]);
1744 }
fe14fcc3
LW		 1745 tmpenv[max] = Nullch;
1746 environ = tmpenv; /* tell exec where it is now */
1747 }
a687059c 1748 if (!val) {
f2517201 1749 safesysfree(environ[i]);
a687059c
LW		 1750 while (environ[i]) {
1751 environ[i] = environ[i+1];
1752 i++;
1753 }
1754 return;
1755 }
8d063cd8 1756 if (!environ[i]) { /* does not exist yet */
f2517201 1757 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1758 environ[i+1] = Nullch; /* make sure it's null terminated */
1759 }
fe14fcc3 1760 else
f2517201
GS		 1761 safesysfree(environ[i]);
1762 environ[i] = (char*)safesysmalloc((strlen(nam)+strlen(val)+2) * sizeof(char));
1763
62b28dd9 1764#ifndef MSDOS
a687059c 1765 (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
62b28dd9
LW		 1766#else
1767 /* MS-DOS requires environment variable names to be in uppercase */
fe14fcc3
LW		 1768 /* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but
1769 * some utilities and applications may break because they only look
1770 * for upper case strings. (Fixed strupr() bug here.)]
1771 */
1772 strcpy(environ[i],nam); strupr(environ[i]);
62b28dd9
LW		 1773 (void)sprintf(environ[i] + strlen(nam),"=%s",val);
1774#endif /* MSDOS */
f2517201
GS		 1775
1776#else /* PERL_USE_SAFE_PUTENV */
1777 char *new_env;
1778
1779 new_env = (char*)safesysmalloc((strlen(nam) + strlen(val) + 2) * sizeof(char));
1780#ifndef MSDOS
1781 (void)sprintf(new_env,"%s=%s",nam,val);/* all that work just for this */
1782#else
1783 strcpy(new_env,nam); strupr(new_env);
1784 (void)sprintf(new_env + strlen(nam),"=%s",val);
1785#endif
1786 (void)putenv(new_env);
1787#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW		 1788}
1789
3e3baf6d 1790#else /* if WIN32 */
68dc0745 1791
1792void
864dbfa3 1793Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 1794{
3e3baf6d
TB		 1795
1796#ifdef USE_WIN32_RTL_ENV
1797
68dc0745 1798 register char *envstr;
1799 STRLEN namlen = strlen(nam);
3e3baf6d
TB		 1800 STRLEN vallen;
1801 char *oldstr = environ[setenv_getix(nam)];
1802
1803 /* putenv() has totally broken semantics in both the Borland
1804 * and Microsoft CRTLs. They either store the passed pointer in
1805 * the environment without making a copy, or make a copy and don't
1806 * free it. And on top of that, they dont free() old entries that
1807 * are being replaced/deleted. This means the caller must
1808 * free any old entries somehow, or we end up with a memory
1809 * leak every time my_setenv() is called. One might think
1810 * one could directly manipulate environ[], like the UNIX code
1811 * above, but direct changes to environ are not allowed when
1812 * calling putenv(), since the RTLs maintain an internal
1813 * *copy* of environ[]. Bad, bad, *bad* stink.
1814 * GSAR 97-06-07
1815 */
68dc0745 1816
3e3baf6d
TB		 1817 if (!val) {
1818 if (!oldstr)
1819 return;
1820 val = "";
1821 vallen = 0;
1822 }
1823 else
1824 vallen = strlen(val);
f2517201 1825 envstr = (char*)safesysmalloc((namlen + vallen + 3) * sizeof(char));
68dc0745 1826 (void)sprintf(envstr,"%s=%s",nam,val);
76e3520e 1827 (void)PerlEnv_putenv(envstr);
3e3baf6d 1828 if (oldstr)
f2517201 1829 safesysfree(oldstr);
3e3baf6d 1830#ifdef _MSC_VER
f2517201 1831 safesysfree(envstr); /* MSVCRT leaks without this */
3e3baf6d
TB		 1832#endif
1833
1834#else /* !USE_WIN32_RTL_ENV */
1835
ac5c734f
GS		 1836 register char *envstr;
1837 STRLEN len = strlen(nam) + 3;
1838 if (!val) {
1839 val = "";
1840 }
1841 len += strlen(val);
1842 New(904, envstr, len, char);
1843 (void)sprintf(envstr,"%s=%s",nam,val);
1844 (void)PerlEnv_putenv(envstr);
1845 Safefree(envstr);
3e3baf6d
TB		 1846
1847#endif
1848}
1849
1850#endif /* WIN32 */
1851
1852I32
864dbfa3 1853Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB		 1854{
1855 register I32 i, len = strlen(nam);
1856
1857 for (i = 0; environ[i]; i++) {
1858 if (
1859#ifdef WIN32
1860 strnicmp(environ[i],nam,len) == 0
1861#else
1862 strnEQ(environ[i],nam,len)
1863#endif
1864 && environ[i][len] == '=')
1865 break; /* strnEQ must come first to avoid */
1866 } /* potential SEGV's */
1867 return i;
68dc0745 1868}
1869
a0d0e21e 1870#endif /* !VMS */
378cc40b 1871
16d20bd9 1872#ifdef UNLINK_ALL_VERSIONS
79072805 1873I32
864dbfa3 1874Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1875{
79072805 1876 I32 i;
378cc40b 1877
6ad3d225 1878 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1879 return i ? 0 : -1;
1880}
1881#endif
1882
85e6fe83 1883#if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY)
378cc40b 1884char *
864dbfa3 1885Perl_my_bcopy(pTHX_ register const char *from,register char *to,register I32 len)
378cc40b
LW		 1886{
1887 char *retval = to;
1888
7c0587c8
LW		 1889 if (from - to >= 0) {
1890 while (len--)
1891 *to++ = *from++;
1892 }
1893 else {
1894 to += len;
1895 from += len;
1896 while (len--)
faf8582f 1897 *(--to) = *(--from);
7c0587c8 1898 }
378cc40b
LW		 1899 return retval;
1900}
ffed7fef 1901#endif
378cc40b 1902
fc36a67e 1903#ifndef HAS_MEMSET
1904void *
864dbfa3 1905Perl_my_memset(pTHX_ register char *loc, register I32 ch, register I32 len)
fc36a67e 1906{
1907 char *retval = loc;
1908
1909 while (len--)
1910 *loc++ = ch;
1911 return retval;
1912}
1913#endif
1914
7c0587c8 1915#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1916char *
864dbfa3 1917Perl_my_bzero(pTHX_ register char *loc, register I32 len)
378cc40b
LW		 1918{
1919 char *retval = loc;
1920
1921 while (len--)
1922 *loc++ = 0;
1923 return retval;
1924}
1925#endif
7c0587c8 1926
36477c24 1927#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1928I32
864dbfa3 1929Perl_my_memcmp(pTHX_ const char *s1, const char *s2, register I32 len)
7c0587c8 1930{
36477c24 1931 register U8 *a = (U8 *)s1;
1932 register U8 *b = (U8 *)s2;
79072805 1933 register I32 tmp;
7c0587c8
LW		 1934
1935 while (len--) {
36477c24 1936 if (tmp = *a++ - *b++)
7c0587c8
LW		 1937 return tmp;
1938 }
1939 return 0;
1940}
36477c24 1941#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1942
fe14fcc3 1943#ifndef HAS_VPRINTF
a687059c 1944
85e6fe83 1945#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1946char *
1947#else
1948int
1949#endif
08105a92 1950vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1951{
1952 FILE fakebuf;
1953
1954 fakebuf._ptr = dest;
1955 fakebuf._cnt = 32767;
35c8bce7
LW		 1956#ifndef _IOSTRG
1957#define _IOSTRG 0
1958#endif
a687059c
LW		 1959 fakebuf._flag = _IOWRT|_IOSTRG;
1960 _doprnt(pat, args, &fakebuf); /* what a kludge */
1961 (void)putc('\0', &fakebuf);
85e6fe83 1962#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1963 return(dest);
1964#else
1965 return 0; /* perl doesn't use return value */
1966#endif
1967}
1968
fe14fcc3 1969#endif /* HAS_VPRINTF */
a687059c
LW		 1970
1971#ifdef MYSWAP
ffed7fef 1972#if BYTEORDER != 0x4321
a687059c 1973short
864dbfa3 1974Perl_my_swap(pTHX_ short s)
a687059c
LW		 1975{
1976#if (BYTEORDER & 1) == 0
1977 short result;
1978
1979 result = ((s & 255) << 8) + ((s >> 8) & 255);
1980 return result;
1981#else
1982 return s;
1983#endif
1984}
1985
1986long
864dbfa3 1987Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1988{
1989 union {
1990 long result;
ffed7fef 1991 char c[sizeof(long)];
a687059c
LW		 1992 } u;
1993
ffed7fef 1994#if BYTEORDER == 0x1234
a687059c
LW		 1995 u.c[0] = (l >> 24) & 255;
1996 u.c[1] = (l >> 16) & 255;
1997 u.c[2] = (l >> 8) & 255;
1998 u.c[3] = l & 255;
1999 return u.result;
2000#else
ffed7fef 2001#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2002 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2003#else
79072805
LW		 2004 register I32 o;
2005 register I32 s;
a687059c 2006
ffed7fef
LW		 2007 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2008 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 2009 }
2010 return u.result;
2011#endif
2012#endif
2013}
2014
2015long
864dbfa3 2016Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 2017{
2018 union {
2019 long l;
ffed7fef 2020 char c[sizeof(long)];
a687059c
LW		 2021 } u;
2022
ffed7fef 2023#if BYTEORDER == 0x1234
a687059c
LW		 2024 u.c[0] = (l >> 24) & 255;
2025 u.c[1] = (l >> 16) & 255;
2026 u.c[2] = (l >> 8) & 255;
2027 u.c[3] = l & 255;
2028 return u.l;
2029#else
ffed7fef 2030#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2031 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2032#else
79072805
LW		 2033 register I32 o;
2034 register I32 s;
a687059c
LW		 2035
2036 u.l = l;
2037 l = 0;
ffed7fef
LW		 2038 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2039 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 2040 }
2041 return l;
2042#endif
2043#endif
2044}
2045
ffed7fef 2046#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 2047#endif /* MYSWAP */
2048
2049/*
2050 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2051 * If these functions are defined,
2052 * the BYTEORDER is neither 0x1234 nor 0x4321.
2053 * However, this is not assumed.
2054 * -DWS
2055 */
2056
2057#define HTOV(name,type) \
2058 type \
ba106d47 2059 name (register type n) \
988174c1
LW		 2060 { \
2061 union { \
2062 type value; \
2063 char c[sizeof(type)]; \
2064 } u; \
79072805
LW		 2065 register I32 i; \
2066 register I32 s; \
988174c1
LW		 2067 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2068 u.c[i] = (n >> s) & 0xFF; \
2069 } \
2070 return u.value; \
2071 }
2072
2073#define VTOH(name,type) \
2074 type \
ba106d47 2075 name (register type n) \
988174c1
LW		 2076 { \
2077 union { \
2078 type value; \
2079 char c[sizeof(type)]; \
2080 } u; \
79072805
LW		 2081 register I32 i; \
2082 register I32 s; \
988174c1
LW		 2083 u.value = n; \
2084 n = 0; \
2085 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2086 n += (u.c[i] & 0xFF) << s; \
2087 } \
2088 return n; \
2089 }
2090
2091#if defined(HAS_HTOVS) && !defined(htovs)
2092HTOV(htovs,short)
2093#endif
2094#if defined(HAS_HTOVL) && !defined(htovl)
2095HTOV(htovl,long)
2096#endif
2097#if defined(HAS_VTOHS) && !defined(vtohs)
2098VTOH(vtohs,short)
2099#endif
2100#if defined(HAS_VTOHL) && !defined(vtohl)
2101VTOH(vtohl,long)
2102#endif
a687059c 2103
5f05dabc 2104 /* VMS' my_popen() is in VMS.c, same with OS/2. */
092bebab 2105#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
760ac839 2106PerlIO *
864dbfa3 2107Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2108{
2109 int p[2];
8ac85365 2110 register I32 This, that;
79072805
LW		 2111 register I32 pid;
2112 SV *sv;
1738f5c4 2113 I32 doexec = strNE(cmd,"-");
e446cec8
IZ		 2114 I32 did_pipes = 0;
2115 int pp[2];
a687059c 2116
45bc9206 2117 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2118#ifdef OS2
2119 if (doexec) {
2120 return my_syspopen(cmd,mode);
2121 }
2122#endif
8ac85365
NIS		 2123 This = (*mode == 'w');
2124 that = !This;
3280af22 2125 if (doexec && PL_tainting) {
bbce6d69 2126 taint_env();
2127 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2128 }
c2267164
IZ		 2129 if (PerlProc_pipe(p) < 0)
2130 return Nullfp;
e446cec8
IZ		 2131 if (doexec && PerlProc_pipe(pp) >= 0)
2132 did_pipes = 1;
a687059c
LW		 2133 while ((pid = (doexec?vfork():fork())) < 0) {
2134 if (errno != EAGAIN) {
6ad3d225 2135 PerlLIO_close(p[This]);
e446cec8
IZ		 2136 if (did_pipes) {
2137 PerlLIO_close(pp[0]);
2138 PerlLIO_close(pp[1]);
2139 }
a687059c 2140 if (!doexec)
cea2e8a9 2141 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 2142 return Nullfp;
2143 }
2144 sleep(5);
2145 }
2146 if (pid == 0) {
79072805
LW		 2147 GV* tmpgv;
2148
30ac6d9b
GS		 2149#undef THIS
2150#undef THAT
a687059c 2151#define THIS that
8ac85365 2152#define THAT This
6ad3d225 2153 PerlLIO_close(p[THAT]);
e446cec8
IZ		 2154 if (did_pipes) {
2155 PerlLIO_close(pp[0]);
2156#if defined(HAS_FCNTL) && defined(F_SETFD)
2157 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2158#endif
2159 }
a687059c 2160 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2161 PerlLIO_dup2(p[THIS], *mode == 'r');
2162 PerlLIO_close(p[THIS]);
a687059c 2163 }
4435c477 2164#ifndef OS2
a687059c 2165 if (doexec) {
a0d0e21e 2166#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2167 int fd;
2168
2169#ifndef NOFILE
2170#define NOFILE 20
2171#endif
6b88bc9c 2172 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
e446cec8
IZ		 2173 if (fd != pp[1])
2174 PerlLIO_close(fd);
ae986130 2175#endif
e446cec8 2176 do_exec3(cmd,pp[1],did_pipes); /* may or may not use the shell */
6ad3d225 2177 PerlProc__exit(1);
a687059c 2178 }
4435c477 2179#endif /* defined OS2 */
de3bb511 2180 /*SUPPRESS 560*/
85e6fe83 2181 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
1e422769 2182 sv_setiv(GvSV(tmpgv), (IV)getpid());
3280af22
NIS		 2183 PL_forkprocess = 0;
2184 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2185 return Nullfp;
2186#undef THIS
2187#undef THAT
2188 }
62b28dd9 2189 do_execfree(); /* free any memory malloced by child on vfork */
6ad3d225 2190 PerlLIO_close(p[that]);
e446cec8
IZ		 2191 if (did_pipes)
2192 PerlLIO_close(pp[1]);
8ac85365 2193 if (p[that] < p[This]) {
6ad3d225
GS		 2194 PerlLIO_dup2(p[This], p[that]);
2195 PerlLIO_close(p[This]);
8ac85365 2196 p[This] = p[that];
62b28dd9 2197 }
3280af22 2198 sv = *av_fetch(PL_fdpid,p[This],TRUE);
a0d0e21e 2199 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2200 SvIVX(sv) = pid;
3280af22 2201 PL_forkprocess = pid;
e446cec8
IZ		 2202 if (did_pipes && pid > 0) {
2203 int errkid;
2204 int n = 0, n1;
2205
2206 while (n < sizeof(int)) {
2207 n1 = PerlLIO_read(pp[0],
2208 (void*)(((char*)&errkid)+n),
2209 (sizeof(int)) - n);
2210 if (n1 <= 0)
2211 break;
2212 n += n1;
2213 }
2214 if (n) { /* Error */
2215 if (n != sizeof(int))
cea2e8a9 2216 Perl_croak(aTHX_ "panic: kid popen errno read");
e446cec8
IZ		 2217 PerlLIO_close(pp[0]);
2218 errno = errkid; /* Propagate errno from kid */
2219 return Nullfp;
2220 }
2221 }
2222 if (did_pipes)
2223 PerlLIO_close(pp[0]);
8ac85365 2224 return PerlIO_fdopen(p[This], mode);
a687059c 2225}
7c0587c8 2226#else
55497cff 2227#if defined(atarist) || defined(DJGPP)
7c0587c8 2228FILE *popen();
760ac839 2229PerlIO *
864dbfa3 2230Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2231{
760ac839 2232 /* Needs work for PerlIO ! */
55497cff 2233 /* used 0 for 2nd parameter to PerlIO-exportFILE; apparently not used */
45bc9206 2234 PERL_FLUSHALL_FOR_CHILD;
55497cff 2235 return popen(PerlIO_exportFILE(cmd, 0), mode);
7c0587c8
LW		 2236}
2237#endif
2238
2239#endif /* !DOSISH */
a687059c 2240
748a9306 2241#ifdef DUMP_FDS
35ff7856 2242void
864dbfa3 2243Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2244{
2245 int fd;
2246 struct stat tmpstatbuf;
2247
760ac839 2248 PerlIO_printf(PerlIO_stderr(),"%s", s);
ae986130 2249 for (fd = 0; fd < 32; fd++) {
6ad3d225 2250 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
760ac839 2251 PerlIO_printf(PerlIO_stderr()," %d",fd);
ae986130 2252 }
760ac839 2253 PerlIO_printf(PerlIO_stderr(),"\n");
ae986130 2254}
35ff7856 2255#endif /* DUMP_FDS */
ae986130 2256
fe14fcc3 2257#ifndef HAS_DUP2
fec02dd3 2258int
ba106d47 2259dup2(int oldfd, int newfd)
a687059c 2260{
a0d0e21e 2261#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2262 if (oldfd == newfd)
2263 return oldfd;
6ad3d225 2264 PerlLIO_close(newfd);
fec02dd3 2265 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2266#else
fc36a67e 2267#define DUP2_MAX_FDS 256
2268 int fdtmp[DUP2_MAX_FDS];
79072805 2269 I32 fdx = 0;
ae986130
LW		 2270 int fd;
2271
fe14fcc3 2272 if (oldfd == newfd)
fec02dd3 2273 return oldfd;
6ad3d225 2274 PerlLIO_close(newfd);
fc36a67e 2275 /* good enough for low fd's... */
6ad3d225 2276 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2277 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2278 PerlLIO_close(fd);
fc36a67e 2279 fd = -1;
2280 break;
2281 }
ae986130 2282 fdtmp[fdx++] = fd;
fc36a67e 2283 }
ae986130 2284 while (fdx > 0)
6ad3d225 2285 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2286 return fd;
62b28dd9 2287#endif
a687059c
LW		 2288}
2289#endif
2290
ff68c719 2291
2292#ifdef HAS_SIGACTION
2293
2294Sighandler_t
864dbfa3 2295Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2296{
2297 struct sigaction act, oact;
2298
2299 act.sa_handler = handler;
2300 sigemptyset(&act.sa_mask);
2301 act.sa_flags = 0;
2302#ifdef SA_RESTART
2303 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2304#endif
85264bed
CS		 2305#ifdef SA_NOCLDWAIT
2306 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2307 act.sa_flags |= SA_NOCLDWAIT;
2308#endif
ff68c719 2309 if (sigaction(signo, &act, &oact) == -1)
36477c24 2310 return SIG_ERR;
ff68c719 2311 else
36477c24 2312 return oact.sa_handler;
ff68c719 2313}
2314
2315Sighandler_t
864dbfa3 2316Perl_rsignal_state(pTHX_ int signo)
ff68c719 2317{
2318 struct sigaction oact;
2319
2320 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2321 return SIG_ERR;
2322 else
2323 return oact.sa_handler;
2324}
2325
2326int
864dbfa3 2327Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2328{
2329 struct sigaction act;
2330
2331 act.sa_handler = handler;
2332 sigemptyset(&act.sa_mask);
2333 act.sa_flags = 0;
2334#ifdef SA_RESTART
2335 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2336#endif
85264bed
CS		 2337#ifdef SA_NOCLDWAIT
2338 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2339 act.sa_flags |= SA_NOCLDWAIT;
2340#endif
ff68c719 2341 return sigaction(signo, &act, save);
2342}
2343
2344int
864dbfa3 2345Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2346{
2347 return sigaction(signo, save, (struct sigaction *)NULL);
2348}
2349
2350#else /* !HAS_SIGACTION */
2351
2352Sighandler_t
864dbfa3 2353Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2354{
6ad3d225 2355 return PerlProc_signal(signo, handler);
ff68c719 2356}
2357
2358static int sig_trapped;
2359
2360static
2361Signal_t
4e35701f 2362sig_trap(int signo)
ff68c719 2363{
2364 sig_trapped++;
2365}
2366
2367Sighandler_t
864dbfa3 2368Perl_rsignal_state(pTHX_ int signo)
ff68c719 2369{
2370 Sighandler_t oldsig;
2371
2372 sig_trapped = 0;
6ad3d225
GS		 2373 oldsig = PerlProc_signal(signo, sig_trap);
2374 PerlProc_signal(signo, oldsig);
ff68c719 2375 if (sig_trapped)
6ad3d225 2376 PerlProc_kill(getpid(), signo);
ff68c719 2377 return oldsig;
2378}
2379
2380int
864dbfa3 2381Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2382{
6ad3d225 2383 *save = PerlProc_signal(signo, handler);
ff68c719 2384 return (*save == SIG_ERR) ? -1 : 0;
2385}
2386
2387int
864dbfa3 2388Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2389{
6ad3d225 2390 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2391}
2392
2393#endif /* !HAS_SIGACTION */
2394
5f05dabc 2395 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
092bebab 2396#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
79072805 2397I32
864dbfa3 2398Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2399{
ff68c719 2400 Sigsave_t hstat, istat, qstat;
a687059c 2401 int status;
a0d0e21e 2402 SV **svp;
20188a90 2403 int pid;
1d3434b8 2404 int pid2;
03136e13
CS		 2405 bool close_failed;
2406 int saved_errno;
2407#ifdef VMS
2408 int saved_vaxc_errno;
2409#endif
22fae026
TM		 2410#ifdef WIN32
2411 int saved_win32_errno;
2412#endif
a687059c 2413
3280af22 2414 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
748a9306 2415 pid = (int)SvIVX(*svp);
a0d0e21e 2416 SvREFCNT_dec(*svp);
3280af22 2417 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2418#ifdef OS2
2419 if (pid == -1) { /* Opened by popen. */
2420 return my_syspclose(ptr);
2421 }
2422#endif
03136e13
CS		 2423 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2424 saved_errno = errno;
2425#ifdef VMS
2426 saved_vaxc_errno = vaxc$errno;
2427#endif
22fae026
TM		 2428#ifdef WIN32
2429 saved_win32_errno = GetLastError();
2430#endif
03136e13 2431 }
7c0587c8 2432#ifdef UTS
6ad3d225 2433 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2434#endif
ff68c719 2435 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2436 rsignal_save(SIGINT, SIG_IGN, &istat);
2437 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
748a9306 2438 do {
1d3434b8
GS		 2439 pid2 = wait4pid(pid, &status, 0);
2440 } while (pid2 == -1 && errno == EINTR);
ff68c719 2441 rsignal_restore(SIGHUP, &hstat);
2442 rsignal_restore(SIGINT, &istat);
2443 rsignal_restore(SIGQUIT, &qstat);
03136e13
CS		 2444 if (close_failed) {
2445 SETERRNO(saved_errno, saved_vaxc_errno);
2446 return -1;
2447 }
1d3434b8 2448 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2449}
4633a7c4
LW		 2450#endif /* !DOSISH */
2451
8736538c 2452#if !defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(CYGWIN32)
79072805 2453I32
864dbfa3 2454Perl_wait4pid(pTHX_ int pid, int *statusp, int flags)
20188a90 2455{
79072805
LW		 2456 SV *sv;
2457 SV** svp;
fc36a67e 2458 char spid[TYPE_CHARS(int)];
20188a90
LW		 2459
2460 if (!pid)
2461 return -1;
20188a90
LW		 2462 if (pid > 0) {
2463 sprintf(spid, "%d", pid);
3280af22
NIS		 2464 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2465 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2466 *statusp = SvIVX(*svp);
3280af22 2467 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2468 return pid;
2469 }
2470 }
2471 else {
79072805 2472 HE *entry;
20188a90 2473
3280af22
NIS		 2474 hv_iterinit(PL_pidstatus);
2475 if (entry = hv_iternext(PL_pidstatus)) {
a0d0e21e 2476 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2477 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2478 *statusp = SvIVX(sv);
20188a90 2479 sprintf(spid, "%d", pid);
3280af22 2480 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2481 return pid;
2482 }
2483 }
79072805 2484#ifdef HAS_WAITPID
367f3c24
IZ		 2485# ifdef HAS_WAITPID_RUNTIME
2486 if (!HAS_WAITPID_RUNTIME)
2487 goto hard_way;
2488# endif
f55ee38a 2489 return PerlProc_waitpid(pid,statusp,flags);
367f3c24
IZ		 2490#endif
2491#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
a0d0e21e 2492 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
367f3c24
IZ		 2493#endif
2494#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2495 hard_way:
a0d0e21e
LW		 2496 {
2497 I32 result;
2498 if (flags)
cea2e8a9 2499 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2500 else {
76e3520e 2501 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2502 pidgone(result,*statusp);
2503 if (result < 0)
2504 *statusp = -1;
2505 }
2506 return result;
a687059c
LW		 2507 }
2508#endif
a687059c 2509}
2d7a9237 2510#endif /* !DOSISH || OS2 || WIN32 */
a687059c 2511
7c0587c8 2512void
de3bb511 2513/*SUPPRESS 590*/
864dbfa3 2514Perl_pidgone(pTHX_ int pid, int status)
a687059c 2515{
79072805 2516 register SV *sv;
fc36a67e 2517 char spid[TYPE_CHARS(int)];
a687059c 2518
20188a90 2519 sprintf(spid, "%d", pid);
3280af22 2520 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2521 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2522 SvIVX(sv) = status;
20188a90 2523 return;
a687059c
LW		 2524}
2525
55497cff 2526#if defined(atarist) || defined(OS2) || defined(DJGPP)
7c0587c8 2527int pclose();
ddcf38b7
IZ		 2528#ifdef HAS_FORK
2529int /* Cannot prototype with I32
2530 in os2ish.h. */
ba106d47 2531my_syspclose(PerlIO *ptr)
ddcf38b7 2532#else
79072805 2533I32
864dbfa3 2534Perl_my_pclose(pTHX_ PerlIO *ptr)
ddcf38b7 2535#endif
a687059c 2536{
760ac839
LW		 2537 /* Needs work for PerlIO ! */
2538 FILE *f = PerlIO_findFILE(ptr);
2539 I32 result = pclose(f);
2540 PerlIO_releaseFILE(ptr,f);
2541 return result;
a687059c 2542}
7c0587c8 2543#endif
9f68db38
LW		 2544
2545void
864dbfa3 2546Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2547{
79072805 2548 register I32 todo;
08105a92 2549 register const char *frombase = from;
9f68db38
LW		 2550
2551 if (len == 1) {
08105a92 2552 register const char c = *from;
9f68db38 2553 while (count-- > 0)
5926133d 2554 *to++ = c;
9f68db38
LW		 2555 return;
2556 }
2557 while (count-- > 0) {
2558 for (todo = len; todo > 0; todo--) {
2559 *to++ = *from++;
2560 }
2561 from = frombase;
2562 }
2563}
0f85fab0 2564
463ee0b2 2565U32
864dbfa3 2566Perl_cast_ulong(pTHX_ double f)
0f85fab0
LW		 2567{
2568 long along;
2569
27e2fb84 2570#if CASTFLAGS & 2
34de22dd
LW		 2571# define BIGDOUBLE 2147483648.0
2572 if (f >= BIGDOUBLE)
2573 return (unsigned long)(f-(long)(f/BIGDOUBLE)*BIGDOUBLE)|0x80000000;
2574#endif
0f85fab0
LW		 2575 if (f >= 0.0)
2576 return (unsigned long)f;
2577 along = (long)f;
2578 return (unsigned long)along;
2579}
ed6116ce 2580# undef BIGDOUBLE
5d94fbed 2581
5d94fbed
AD		 2582/* Unfortunately, on some systems the cast_uv() function doesn't
2583 work with the system-supplied definition of ULONG_MAX. The
2584 comparison (f >= ULONG_MAX) always comes out true. It must be a
2585 problem with the compiler constant folding.
2586
2587 In any case, this workaround should be fine on any two's complement
2588 system. If it's not, supply a '-DMY_ULONG_MAX=whatever' in your
2589 ccflags.
2590 --Andy Dougherty <doughera@lafcol.lafayette.edu>
2591*/
1eb770ff 2592
2593/* Code modified to prefer proper named type ranges, I32, IV, or UV, instead
2594 of LONG_(MIN/MAX).
2595 -- Kenneth Albanowski <kjahds@kjahds.com>
2596*/
2597
20cec16a 2598#ifndef MY_UV_MAX
2599# define MY_UV_MAX ((UV)IV_MAX * (UV)2 + (UV)1)
5d94fbed
AD		 2600#endif
2601
ed6116ce 2602I32
864dbfa3 2603Perl_cast_i32(pTHX_ double f)
ed6116ce 2604{
20cec16a 2605 if (f >= I32_MAX)
2606 return (I32) I32_MAX;
2607 if (f <= I32_MIN)
2608 return (I32) I32_MIN;
ed6116ce
LW		 2609 return (I32) f;
2610}
a0d0e21e
LW		 2611
2612IV
864dbfa3 2613Perl_cast_iv(pTHX_ double f)
a0d0e21e 2614{
25da4f38
IZ		 2615 if (f >= IV_MAX) {
2616 UV uv;
2617
2618 if (f >= (double)UV_MAX)
2619 return (IV) UV_MAX;
2620 uv = (UV) f;
2621 return (IV)uv;
2622 }
20cec16a 2623 if (f <= IV_MIN)
2624 return (IV) IV_MIN;
a0d0e21e
LW		 2625 return (IV) f;
2626}
5d94fbed
AD		 2627
2628UV
864dbfa3 2629Perl_cast_uv(pTHX_ double f)
5d94fbed 2630{
20cec16a 2631 if (f >= MY_UV_MAX)
2632 return (UV) MY_UV_MAX;
25da4f38
IZ		 2633 if (f < 0) {
2634 IV iv;
2635
2636 if (f < IV_MIN)
2637 return (UV)IV_MIN;
2638 iv = (IV) f;
2639 return (UV) iv;
2640 }
5d94fbed
AD		 2641 return (UV) f;
2642}
2643
fe14fcc3 2644#ifndef HAS_RENAME
79072805 2645I32
864dbfa3 2646Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 2647{
93a17b20
LW		 2648 char *fa = strrchr(a,'/');
2649 char *fb = strrchr(b,'/');
62b28dd9
LW		 2650 struct stat tmpstatbuf1;
2651 struct stat tmpstatbuf2;
46fc3d4c 2652 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2653
2654 if (fa)
2655 fa++;
2656 else
2657 fa = a;
2658 if (fb)
2659 fb++;
2660 else
2661 fb = b;
2662 if (strNE(a,b))
2663 return FALSE;
2664 if (fa == a)
46fc3d4c 2665 sv_setpv(tmpsv, ".");
62b28dd9 2666 else
46fc3d4c 2667 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 2668 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2669 return FALSE;
2670 if (fb == b)
46fc3d4c 2671 sv_setpv(tmpsv, ".");
62b28dd9 2672 else
46fc3d4c 2673 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 2674 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2675 return FALSE;
2676 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2677 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2678}
fe14fcc3
LW		 2679#endif /* !HAS_RENAME */
2680
55497cff 2681UV
864dbfa3 2682Perl_scan_bin(pTHX_ char *start, I32 len, I32 *retlen)
4f19785b
WSI		 2683{
2684 register char *s = start;
2685 register UV retval = 0;
2686 bool overflowed = FALSE;
2687 while (len && *s >= '0' && *s <= '1') {
2688 register UV n = retval << 1;
2689 if (!overflowed && (n >> 1) != retval) {
cea2e8a9 2690 Perl_warn(aTHX_ "Integer overflow in binary number");
4f19785b
WSI		 2691 overflowed = TRUE;
2692 }
2693 retval = n | (*s++ - '0');
2694 len--;
2695 }
6529e8bd 2696 if (len && (*s >= '2' && *s <= '9')) {
4f19785b
WSI		 2697 dTHR;
2698 if (ckWARN(WARN_UNSAFE))
cea2e8a9 2699 Perl_warner(aTHX_ WARN_UNSAFE, "Illegal binary digit '%c' ignored", *s);
4f19785b
WSI		 2700 }
2701 *retlen = s - start;
2702 return retval;
2703}
2704UV
864dbfa3 2705Perl_scan_oct(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2706{
2707 register char *s = start;
55497cff 2708 register UV retval = 0;
2709 bool overflowed = FALSE;
fe14fcc3 2710
748a9306 2711 while (len && *s >= '0' && *s <= '7') {
55497cff 2712 register UV n = retval << 3;
2713 if (!overflowed && (n >> 3) != retval) {
cea2e8a9 2714 Perl_warn(aTHX_ "Integer overflow in octal number");
55497cff 2715 overflowed = TRUE;
2716 }
2717 retval = n | (*s++ - '0');
748a9306 2718 len--;
fe14fcc3 2719 }
d008e5eb
GS		 2720 if (len && (*s == '8' || *s == '9')) {
2721 dTHR;
2722 if (ckWARN(WARN_OCTAL))
cea2e8a9 2723 Perl_warner(aTHX_ WARN_OCTAL, "Illegal octal digit '%c' ignored", *s);
d008e5eb 2724 }
fe14fcc3
LW		 2725 *retlen = s - start;
2726 return retval;
2727}
2728
71be2cbc 2729UV
864dbfa3 2730Perl_scan_hex(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2731{
2732 register char *s = start;
55497cff 2733 register UV retval = 0;
2734 bool overflowed = FALSE;
6ff81951 2735 char *tmp = s;
a0ed51b3 2736 register UV n;
fe14fcc3 2737
a0ed51b3
LW		 2738 while (len-- && *s) {
2739 tmp = strchr((char *) PL_hexdigit, *s++);
2740 if (!tmp) {
e3fdf988 2741 if (*(s-1) == '_' || (*(s-1) == 'x' && retval == 0))
a0ed51b3
LW		 2742 continue;
2743 else {
d008e5eb 2744 dTHR;
a0ed51b3 2745 --s;
599cee73 2746 if (ckWARN(WARN_UNSAFE))
cea2e8a9 2747 Perl_warner(aTHX_ WARN_UNSAFE,"Illegal hex digit '%c' ignored", *s);
a0ed51b3
LW		 2748 break;
2749 }
2750 }
2751 n = retval << 4;
55497cff 2752 if (!overflowed && (n >> 4) != retval) {
cea2e8a9 2753 Perl_warn(aTHX_ "Integer overflow in hex number");
55497cff 2754 overflowed = TRUE;
2755 }
3280af22 2756 retval = n | ((tmp - PL_hexdigit) & 15);
6ff81951 2757 }
fe14fcc3
LW		 2758 *retlen = s - start;
2759 return retval;
2760}
760ac839 2761
491527d0 2762char*
864dbfa3 2763Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0
GS		 2764{
2765 dTHR;
2766 char *xfound = Nullch;
2767 char *xfailed = Nullch;
0f31cffe 2768 char tmpbuf[MAXPATHLEN];
491527d0
GS		 2769 register char *s;
2770 I32 len;
2771 int retval;
2772#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2773# define SEARCH_EXTS ".bat", ".cmd", NULL
2774# define MAX_EXT_LEN 4
2775#endif
2776#ifdef OS2
2777# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2778# define MAX_EXT_LEN 4
2779#endif
2780#ifdef VMS
2781# define SEARCH_EXTS ".pl", ".com", NULL
2782# define MAX_EXT_LEN 4
2783#endif
2784 /* additional extensions to try in each dir if scriptname not found */
2785#ifdef SEARCH_EXTS
2786 char *exts[] = { SEARCH_EXTS };
2787 char **ext = search_ext ? search_ext : exts;
2788 int extidx = 0, i = 0;
2789 char *curext = Nullch;
2790#else
2791# define MAX_EXT_LEN 0
2792#endif
2793
2794 /*
2795 * If dosearch is true and if scriptname does not contain path
2796 * delimiters, search the PATH for scriptname.
2797 *
2798 * If SEARCH_EXTS is also defined, will look for each
2799 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2800 * while searching the PATH.
2801 *
2802 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2803 * proceeds as follows:
2804 * If DOSISH or VMSISH:
2805 * + look for ./scriptname{,.foo,.bar}
2806 * + search the PATH for scriptname{,.foo,.bar}
2807 *
2808 * If !DOSISH:
2809 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2810 * this will not look in '.' if it's not in the PATH)
2811 */
84486fc6 2812 tmpbuf[0] = '\0';
491527d0
GS		 2813
2814#ifdef VMS
2815# ifdef ALWAYS_DEFTYPES
2816 len = strlen(scriptname);
2817 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2818 int hasdir, idx = 0, deftypes = 1;
2819 bool seen_dot = 1;
2820
2821 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2822# else
2823 if (dosearch) {
2824 int hasdir, idx = 0, deftypes = 1;
2825 bool seen_dot = 1;
2826
2827 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2828# endif
2829 /* The first time through, just add SEARCH_EXTS to whatever we
2830 * already have, so we can check for default file types. */
2831 while (deftypes ||
84486fc6 2832 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2833 {
2834 if (deftypes) {
2835 deftypes = 0;
84486fc6 2836 *tmpbuf = '\0';
491527d0 2837 }
84486fc6
GS		 2838 if ((strlen(tmpbuf) + strlen(scriptname)
2839 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2840 continue; /* don't search dir with too-long name */
84486fc6 2841 strcat(tmpbuf, scriptname);
491527d0
GS		 2842#else /* !VMS */
2843
2844#ifdef DOSISH
2845 if (strEQ(scriptname, "-"))
2846 dosearch = 0;
2847 if (dosearch) { /* Look in '.' first. */
2848 char *cur = scriptname;
2849#ifdef SEARCH_EXTS
2850 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2851 while (ext[i])
2852 if (strEQ(ext[i++],curext)) {
2853 extidx = -1; /* already has an ext */
2854 break;
2855 }
2856 do {
2857#endif
2858 DEBUG_p(PerlIO_printf(Perl_debug_log,
2859 "Looking for %s\n",cur));
017f25f1
IZ		 2860 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2861 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2862 dosearch = 0;
2863 scriptname = cur;
2864#ifdef SEARCH_EXTS
2865 break;
2866#endif
2867 }
2868#ifdef SEARCH_EXTS
2869 if (cur == scriptname) {
2870 len = strlen(scriptname);
84486fc6 2871 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2872 break;
84486fc6 2873 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2874 }
2875 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2876 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2877#endif
2878 }
2879#endif
2880
2881 if (dosearch && !strchr(scriptname, '/')
2882#ifdef DOSISH
2883 && !strchr(scriptname, '\\')
2884#endif
2885 && (s = PerlEnv_getenv("PATH"))) {
2886 bool seen_dot = 0;
2887
3280af22
NIS		 2888 PL_bufend = s + strlen(s);
2889 while (s < PL_bufend) {
491527d0
GS		 2890#if defined(atarist) || defined(DOSISH)
2891 for (len = 0; *s
2892# ifdef atarist
2893 && *s != ','
2894# endif
2895 && *s != ';'; len++, s++) {
84486fc6
GS		 2896 if (len < sizeof tmpbuf)
2897 tmpbuf[len] = *s;
491527d0 2898 }
84486fc6
GS		 2899 if (len < sizeof tmpbuf)
2900 tmpbuf[len] = '\0';
491527d0 2901#else /* ! (atarist || DOSISH) */
3280af22 2902 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2903 ':',
2904 &len);
2905#endif /* ! (atarist || DOSISH) */
3280af22 2906 if (s < PL_bufend)
491527d0 2907 s++;
84486fc6 2908 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS		 2909 continue; /* don't search dir with too-long name */
2910 if (len
61ae2fbf 2911#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2912 && tmpbuf[len - 1] != '/'
2913 && tmpbuf[len - 1] != '\\'
491527d0
GS		 2914#endif
2915 )
84486fc6
GS		 2916 tmpbuf[len++] = '/';
2917 if (len == 2 && tmpbuf[0] == '.')
491527d0 2918 seen_dot = 1;
84486fc6 2919 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2920#endif /* !VMS */
2921
2922#ifdef SEARCH_EXTS
84486fc6 2923 len = strlen(tmpbuf);
491527d0
GS		 2924 if (extidx > 0) /* reset after previous loop */
2925 extidx = 0;
2926 do {
2927#endif
84486fc6 2928 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2929 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2930 if (S_ISDIR(PL_statbuf.st_mode)) {
2931 retval = -1;
2932 }
491527d0
GS		 2933#ifdef SEARCH_EXTS
2934 } while ( retval < 0 /* not there */
2935 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2936 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2937 );
2938#endif
2939 if (retval < 0)
2940 continue;
3280af22
NIS		 2941 if (S_ISREG(PL_statbuf.st_mode)
2942 && cando(S_IRUSR,TRUE,&PL_statbuf)
491527d0 2943#ifndef DOSISH
3280af22 2944 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2945#endif
2946 )
2947 {
84486fc6 2948 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2949 break;
2950 }
2951 if (!xfailed)
84486fc6 2952 xfailed = savepv(tmpbuf);
491527d0
GS		 2953 }
2954#ifndef DOSISH
017f25f1
IZ		 2955 if (!xfound && !seen_dot && !xfailed &&
2956 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
2957 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2958#endif
2959 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2960 if (!xfound) {
2961 if (flags & 1) { /* do or die? */
cea2e8a9 2962 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 2963 (xfailed ? "execute" : "find"),
2964 (xfailed ? xfailed : scriptname),
2965 (xfailed ? "" : " on PATH"),
2966 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2967 }
2968 scriptname = Nullch;
2969 }
491527d0
GS		 2970 if (xfailed)
2971 Safefree(xfailed);
2972 scriptname = xfound;
2973 }
9ccb31f9 2974 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 2975}
2976
2977
11343788 2978#ifdef USE_THREADS
12ca11f6
MB		 2979#ifdef FAKE_THREADS
2980/* Very simplistic scheduler for now */
2981void
2982schedule(void)
2983{
c7848ba1 2984 thr = thr->i.next_run;
12ca11f6
MB		 2985}
2986
2987void
864dbfa3 2988Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB		 2989{
2990 *cp = 0;
2991}
2992
2993void
864dbfa3 2994Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 2995{
51dd5992 2996 perl_os_thread t;
12ca11f6
MB		 2997 perl_cond cond = *cp;
2998
2999 if (!cond)
3000 return;
3001 t = cond->thread;
3002 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3003 t->i.next_run = thr->i.next_run;
3004 thr->i.next_run->i.prev_run = t;
3005 t->i.prev_run = thr;
3006 thr->i.next_run = t;
3007 thr->i.wait_queue = 0;
12ca11f6
MB		 3008 /* Remove from the wait queue */
3009 *cp = cond->next;
3010 Safefree(cond);
3011}
3012
3013void
864dbfa3 3014Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 3015{
51dd5992 3016 perl_os_thread t;
12ca11f6
MB		 3017 perl_cond cond, cond_next;
3018
3019 for (cond = *cp; cond; cond = cond_next) {
3020 t = cond->thread;
3021 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3022 t->i.next_run = thr->i.next_run;
3023 thr->i.next_run->i.prev_run = t;
3024 t->i.prev_run = thr;
3025 thr->i.next_run = t;
3026 thr->i.wait_queue = 0;
12ca11f6
MB		 3027 /* Remove from the wait queue */
3028 cond_next = cond->next;
3029 Safefree(cond);
3030 }
3031 *cp = 0;
3032}
3033
3034void
864dbfa3 3035Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB		 3036{
3037 perl_cond cond;
3038
c7848ba1 3039 if (thr->i.next_run == thr)
cea2e8a9 3040 Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
12ca11f6 3041
0f15f207 3042 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB		 3043 cond->thread = thr;
3044 cond->next = *cp;
3045 *cp = cond;
c7848ba1 3046 thr->i.wait_queue = cond;
12ca11f6 3047 /* Remove ourselves from runnable queue */
c7848ba1
MB		 3048 thr->i.next_run->i.prev_run = thr->i.prev_run;
3049 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB		 3050}
3051#endif /* FAKE_THREADS */
3052
0d85d877 3053#ifdef PTHREAD_GETSPECIFIC_INT
52e1cb5e 3054struct perl_thread *
864dbfa3 3055Perl_getTHR(pTHX)
11343788
MB		 3056{
3057 pthread_addr_t t;
3058
6b88bc9c 3059 if (pthread_getspecific(PL_thr_key, &t))
cea2e8a9 3060 Perl_croak(aTHX_ "panic: pthread_getspecific");
52e1cb5e 3061 return (struct perl_thread *) t;
11343788 3062}
0d85d877 3063#endif
f93b4edd
MB		 3064
3065MAGIC *
864dbfa3 3066Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB		 3067{
3068 MAGIC *mg;
3069
3070 SvUPGRADE(sv, SVt_PVMG);
3071 mg = mg_find(sv, 'm');
3072 if (!mg) {
3073 condpair_t *cp;
3074
3075 New(53, cp, 1, condpair_t);
3076 MUTEX_INIT(&cp->mutex);
3077 COND_INIT(&cp->owner_cond);
3078 COND_INIT(&cp->cond);
3079 cp->owner = 0;
28a8573f 3080 MUTEX_LOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3081 mg = mg_find(sv, 'm');
3082 if (mg) {
3083 /* someone else beat us to initialising it */
28a8573f 3084 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3085 MUTEX_DESTROY(&cp->mutex);
3086 COND_DESTROY(&cp->owner_cond);
3087 COND_DESTROY(&cp->cond);
3088 Safefree(cp);
3089 }
3090 else {
3091 sv_magic(sv, Nullsv, 'm', 0, 0);
3092 mg = SvMAGIC(sv);
3093 mg->mg_ptr = (char *)cp;
565764a8 3094 mg->mg_len = sizeof(cp);
28a8573f 3095 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
8b73bbec 3096 DEBUG_S(WITH_THR(PerlIO_printf(PerlIO_stderr(),
c7848ba1 3097 "%p: condpair_magic %p\n", thr, sv));)
f93b4edd
MB		 3098 }
3099 }
3100 return mg;
3101}
a863c7d1
MB		 3102
3103/*
199100c8
MB		 3104 * Make a new perl thread structure using t as a prototype. Some of the
3105 * fields for the new thread are copied from the prototype thread, t,
3106 * so t should not be running in perl at the time this function is
3107 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
3108 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 3109 */
52e1cb5e 3110struct perl_thread *
864dbfa3 3111Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 3112{
cea2e8a9 3113#ifndef PERL_IMPLICIT_CONTEXT
52e1cb5e 3114 struct perl_thread *thr;
cea2e8a9 3115#endif
a863c7d1 3116 SV *sv;
199100c8
MB		 3117 SV **svp;
3118 I32 i;
3119
79cb57f6 3120 sv = newSVpvn("", 0);
52e1cb5e
JH		 3121 SvGROW(sv, sizeof(struct perl_thread) + 1);
3122 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 3123 thr = (Thread) SvPVX(sv);
949ced2d 3124#ifdef DEBUGGING
52e1cb5e 3125 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS		 3126 PL_markstack = 0;
3127 PL_scopestack = 0;
3128 PL_savestack = 0;
3129 PL_retstack = 0;
3130 PL_dirty = 0;
3131 PL_localizing = 0;
949ced2d
GS		 3132 Zero(&PL_hv_fetch_ent_mh, 1, HE);
3133#else
3134 Zero(thr, 1, struct perl_thread);
3135#endif
199100c8 3136
cea2e8a9 3137 PL_protect = FUNC_NAME_TO_PTR(Perl_default_protect);
312caa8e 3138
199100c8 3139 thr->oursv = sv;
cea2e8a9 3140 init_stacks();
a863c7d1 3141
533c011a 3142 PL_curcop = &PL_compiling;
199100c8 3143 thr->cvcache = newHV();
54b9620d 3144 thr->threadsv = newAV();
a863c7d1 3145 thr->specific = newAV();
79cb57f6 3146 thr->errsv = newSVpvn("", 0);
38a03e6e 3147 thr->errhv = newHV();
a863c7d1
MB		 3148 thr->flags = THRf_R_JOINABLE;
3149 MUTEX_INIT(&thr->mutex);
199100c8 3150
d55594ae
GS		 3151 /* top_env needs to be non-zero. It points to an area
3152 in which longjmp() stuff is stored, as C callstack
3153 info there at least is thread specific this has to
3154 be per-thread. Otherwise a 'die' in a thread gives
3155 that thread the C stack of last thread to do an eval {}!
3156 See comments in scope.h
3157 Initialize top entry (as in perl.c for main thread)
3158 */
533c011a
NIS		 3159 PL_start_env.je_prev = NULL;
3160 PL_start_env.je_ret = -1;
3161 PL_start_env.je_mustcatch = TRUE;
3162 PL_top_env = &PL_start_env;
3163
faef0170 3164 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR) */
533c011a
NIS		 3165 PL_restartop = 0;
3166
b099ddc0
GS		 3167 PL_statname = NEWSV(66,0);
3168 PL_maxscream = -1;
cea2e8a9
GS		 3169 PL_regcompp = FUNC_NAME_TO_PTR(Perl_pregcomp);
3170 PL_regexecp = FUNC_NAME_TO_PTR(Perl_regexec_flags);
b099ddc0
GS		 3171 PL_regindent = 0;
3172 PL_reginterp_cnt = 0;
3173 PL_lastscream = Nullsv;
3174 PL_screamfirst = 0;
3175 PL_screamnext = 0;
3176 PL_reg_start_tmp = 0;
3177 PL_reg_start_tmpl = 0;
3178
3179 /* parent thread's data needs to be locked while we make copy */
3180 MUTEX_LOCK(&t->mutex);
3181
312caa8e
CS		 3182 PL_protect = t->Tprotect;
3183
b099ddc0
GS		 3184 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
3185 PL_defstash = t->Tdefstash; /* XXX maybe these should */
3186 PL_curstash = t->Tcurstash; /* always be set to main? */
3187
6b88bc9c 3188 PL_tainted = t->Ttainted;
84fee439
NIS		 3189 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
3190 PL_nrs = newSVsv(t->Tnrs);
3191 PL_rs = SvREFCNT_inc(PL_nrs);
3192 PL_last_in_gv = Nullgv;
3193 PL_ofslen = t->Tofslen;
3194 PL_ofs = savepvn(t->Tofs, PL_ofslen);
3195 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
3196 PL_chopset = t->Tchopset;
3197 PL_formtarget = newSVsv(t->Tformtarget);
3198 PL_bodytarget = newSVsv(t->Tbodytarget);
3199 PL_toptarget = newSVsv(t->Ttoptarget);
533c011a 3200
54b9620d
MB		 3201 /* Initialise all per-thread SVs that the template thread used */
3202 svp = AvARRAY(t->threadsv);
93965878 3203 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 3204 if (*svp && *svp != &PL_sv_undef) {
199100c8 3205 SV *sv = newSVsv(*svp);
54b9620d 3206 av_store(thr->threadsv, i, sv);
533c011a 3207 sv_magic(sv, 0, 0, &PL_threadsv_names[i], 1);
8b73bbec 3208 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 3209 "new_struct_thread: copied threadsv %d %p->%p\n",i, t, thr));
199100c8
MB		 3210 }
3211 }
940cb80d 3212 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 3213
533c011a
NIS		 3214 MUTEX_LOCK(&PL_threads_mutex);
3215 PL_nthreads++;
3216 thr->tid = ++PL_threadnum;
199100c8
MB		 3217 thr->next = t->next;
3218 thr->prev = t;
3219 t->next = thr;
3220 thr->next->prev = thr;
533c011a 3221 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 3222
b099ddc0
GS		 3223 /* done copying parent's state */
3224 MUTEX_UNLOCK(&t->mutex);
3225
a863c7d1
MB		 3226#ifdef HAVE_THREAD_INTERN
3227 init_thread_intern(thr);
a863c7d1 3228#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB		 3229 return thr;
3230}
11343788 3231#endif /* USE_THREADS */
760ac839
LW		 3232
3233#ifdef HUGE_VAL
3234/*
3235 * This hack is to force load of "huge" support from libm.a
3236 * So it is in perl for (say) POSIX to use.
3237 * Needed for SunOS with Sun's 'acc' for example.
3238 */
3239double
8ac85365 3240Perl_huge(void)
760ac839
LW		 3241{
3242 return HUGE_VAL;
3243}
3244#endif
4e35701f 3245
22239a37
NIS		 3246#ifdef PERL_GLOBAL_STRUCT
3247struct perl_vars *
864dbfa3 3248Perl_GetVars(pTHX)
22239a37 3249{
533c011a 3250 return &PL_Vars;
22239a37 3251}
31fb1209
NIS		 3252#endif
3253
3254char **
864dbfa3 3255Perl_get_op_names(pTHX)
31fb1209 3256{
22c35a8c 3257 return PL_op_name;
31fb1209
NIS		 3258}
3259
3260char **
864dbfa3 3261Perl_get_op_descs(pTHX)
31fb1209 3262{
22c35a8c 3263 return PL_op_desc;
31fb1209 3264}
9e6b2b00
GS		 3265
3266char *
864dbfa3 3267Perl_get_no_modify(pTHX)
9e6b2b00 3268{
22c35a8c 3269 return (char*)PL_no_modify;
9e6b2b00
GS		 3270}
3271
3272U32 *
864dbfa3 3273Perl_get_opargs(pTHX)
9e6b2b00 3274{
22c35a8c 3275 return PL_opargs;
9e6b2b00 3276}
51aa15f3 3277
a6c40364
GS		 3278#ifndef HAS_GETENV_LEN
3279char *
864dbfa3 3280Perl_getenv_len(pTHX_ char *env_elem, unsigned long *len)
a6c40364
GS		 3281{
3282 char *env_trans = PerlEnv_getenv(env_elem);
3283 if (env_trans)
3284 *len = strlen(env_trans);
3285 return env_trans;
f675dbe5
CB		 3286}
3287#endif
3288
dc9e4912
GS		 3289
3290MGVTBL*
864dbfa3 3291Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS		 3292{
3293 MGVTBL* result = Null(MGVTBL*);
3294
3295 switch(vtbl_id) {
3296 case want_vtbl_sv:
3297 result = &PL_vtbl_sv;
3298 break;
3299 case want_vtbl_env:
3300 result = &PL_vtbl_env;
3301 break;
3302 case want_vtbl_envelem:
3303 result = &PL_vtbl_envelem;
3304 break;
3305 case want_vtbl_sig:
3306 result = &PL_vtbl_sig;
3307 break;
3308 case want_vtbl_sigelem:
3309 result = &PL_vtbl_sigelem;
3310 break;
3311 case want_vtbl_pack:
3312 result = &PL_vtbl_pack;
3313 break;
3314 case want_vtbl_packelem:
3315 result = &PL_vtbl_packelem;
3316 break;
3317 case want_vtbl_dbline:
3318 result = &PL_vtbl_dbline;
3319 break;
3320 case want_vtbl_isa:
3321 result = &PL_vtbl_isa;
3322 break;
3323 case want_vtbl_isaelem:
3324 result = &PL_vtbl_isaelem;
3325 break;
3326 case want_vtbl_arylen:
3327 result = &PL_vtbl_arylen;
3328 break;
3329 case want_vtbl_glob:
3330 result = &PL_vtbl_glob;
3331 break;
3332 case want_vtbl_mglob:
3333 result = &PL_vtbl_mglob;
3334 break;
3335 case want_vtbl_nkeys:
3336 result = &PL_vtbl_nkeys;
3337 break;
3338 case want_vtbl_taint:
3339 result = &PL_vtbl_taint;
3340 break;
3341 case want_vtbl_substr:
3342 result = &PL_vtbl_substr;
3343 break;
3344 case want_vtbl_vec:
3345 result = &PL_vtbl_vec;
3346 break;
3347 case want_vtbl_pos:
3348 result = &PL_vtbl_pos;
3349 break;
3350 case want_vtbl_bm:
3351 result = &PL_vtbl_bm;
3352 break;
3353 case want_vtbl_fm:
3354 result = &PL_vtbl_fm;
3355 break;
3356 case want_vtbl_uvar:
3357 result = &PL_vtbl_uvar;
3358 break;
3359#ifdef USE_THREADS
3360 case want_vtbl_mutex:
3361 result = &PL_vtbl_mutex;
3362 break;
3363#endif
3364 case want_vtbl_defelem:
3365 result = &PL_vtbl_defelem;
3366 break;
3367 case want_vtbl_regexp:
3368 result = &PL_vtbl_regexp;
3369 break;
3370 case want_vtbl_regdata:
3371 result = &PL_vtbl_regdata;
3372 break;
3373 case want_vtbl_regdatum:
3374 result = &PL_vtbl_regdatum;
3375 break;
3c90161d 3376#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3377 case want_vtbl_collxfrm:
3378 result = &PL_vtbl_collxfrm;
3379 break;
3c90161d 3380#endif
dc9e4912
GS		 3381 case want_vtbl_amagic:
3382 result = &PL_vtbl_amagic;
3383 break;
3384 case want_vtbl_amagicelem:
3385 result = &PL_vtbl_amagicelem;
3386 break;
810b8aa5
GS		 3387 case want_vtbl_backref:
3388 result = &PL_vtbl_backref;
3389 break;
dc9e4912
GS		 3390 }
3391 return result;
3392}
3393
767df6a1 3394I32
864dbfa3 3395Perl_my_fflush_all(pTHX)
767df6a1
JH		 3396{
3397#ifdef FFLUSH_NULL
ce720889 3398 return PerlIO_flush(NULL);
767df6a1
JH		 3399#else
3400 long open_max = -1;
ed39a0f2 3401# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
d2201af2
AD		 3402# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3403 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3404# else
767df6a1
JH		 3405# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3406 open_max = sysconf(_SC_OPEN_MAX);
3407# else
3408# ifdef FOPEN_MAX
d2201af2 3409 open_max = FOPEN_MAX;
767df6a1
JH		 3410# else
3411# ifdef OPEN_MAX
d2201af2 3412 open_max = OPEN_MAX;
767df6a1
JH		 3413# else
3414# ifdef _NFILE
d2201af2 3415 open_max = _NFILE;
767df6a1
JH		 3416# endif
3417# endif
3418# endif
3419# endif
d2201af2 3420# endif
767df6a1
JH		 3421 if (open_max > 0) {
3422 long i;
3423 for (i = 0; i < open_max; i++)
d2201af2
AD		 3424 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3425 STDIO_STREAM_ARRAY[i]._file < open_max &&
3426 STDIO_STREAM_ARRAY[i]._flag)
3427 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3428 return 0;
3429 }
3430# endif
3431 SETERRNO(EBADF,RMS$_IFI);
3432 return EOF;
3433#endif
3434}
Unnamed repository; edit this file 'description' to name the repository.