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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)
463ee0b2 85 croak("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)
463ee0b2 131 croak("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)
191 croak("panic: calloc");
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
GS		 299STATIC void
300xstat(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)
530 croak("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
fc36a67e 1310/* the SV for form() and mess() is not kept in an arena */
1311
76e3520e 1312STATIC SV *
864dbfa3 1313mess_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
8990e307 1335char *
864dbfa3 1336Perl_form(pTHX_ const char* pat, ...)
8990e307 1337{
e72dc28c 1338 SV *sv = mess_alloc();
46fc3d4c 1339 va_list args;
46fc3d4c 1340 va_start(args, pat);
e72dc28c 1341 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
46fc3d4c 1342 va_end(args);
e72dc28c 1343 return SvPVX(sv);
46fc3d4c 1344}
a687059c 1345
06bf62c7 1346SV *
864dbfa3 1347Perl_mess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1348{
e72dc28c 1349 SV *sv = mess_alloc();
46fc3d4c 1350 static char dgd[] = " during global destruction.\n";
1351
fc36a67e 1352 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1353 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
e858de61 1354 dTHR;
515f54a1
GS		 1355 if (PL_curcop->cop_line)
1356 sv_catpvf(sv, " at %_ line %ld",
1357 GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
1358 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1359 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1360 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
515f54a1
GS		 1361 sv_catpvf(sv, ", <%s> %s %ld",
1362 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1363 line_mode ? "line" : "chunk",
1364 (long)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1365 }
515f54a1 1366 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1367 }
06bf62c7 1368 return sv;
a687059c
LW		 1369}
1370
36477c24 1371OP *
864dbfa3 1372Perl_die(pTHX_ const char* pat, ...)
36477c24 1373{
5dc0d613 1374 dTHR;
36477c24 1375 va_list args;
1376 char *message;
3280af22 1377 int was_in_eval = PL_in_eval;
36477c24 1378 HV *stash;
1379 GV *gv;
1380 CV *cv;
06bf62c7
GS		 1381 SV *msv;
1382 STRLEN msglen;
36477c24 1383
8b73bbec 1384 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1385 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1386 thr, PL_curstack, PL_mainstack));
36477c24 1387
36477c24 1388 va_start(args, pat);
06bf62c7
GS		 1389 if (pat) {
1390 msv = mess(pat, &args);
1391 message = SvPV(msv,msglen);
1392 }
1393 else {
1394 message = Nullch;
1395 }
36477c24 1396 va_end(args);
1397
8b73bbec 1398 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1399 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1400 thr, message, PL_diehook));
3280af22 1401 if (PL_diehook) {
1738f5c4 1402 /* sv_2cv might call croak() */
3280af22 1403 SV *olddiehook = PL_diehook;
1738f5c4 1404 ENTER;
3280af22
NIS		 1405 SAVESPTR(PL_diehook);
1406 PL_diehook = Nullsv;
1738f5c4
CS		 1407 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1408 LEAVE;
1409 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1410 dSP;
774d564b 1411 SV *msg;
1412
1413 ENTER;
79cb57f6 1414 if (message) {
06bf62c7 1415 msg = newSVpvn(message, msglen);
4e6ea2c3
GS		 1416 SvREADONLY_on(msg);
1417 SAVEFREESV(msg);
1418 }
1419 else {
1420 msg = ERRSV;
1421 }
1738f5c4 1422
e788e7d3 1423 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1424 PUSHMARK(SP);
1738f5c4
CS		 1425 XPUSHs(msg);
1426 PUTBACK;
864dbfa3 1427 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1428 POPSTACK;
774d564b 1429 LEAVE;
1738f5c4 1430 }
36477c24 1431 }
1432
06bf62c7 1433 PL_restartop = die_where(message, msglen);
8b73bbec 1434 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
7c06b590 1435 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1436 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1437 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1438 JMPENV_JUMP(3);
3280af22 1439 return PL_restartop;
36477c24 1440}
1441
79072805 1442void
864dbfa3 1443Perl_croak(pTHX_ const char* pat, ...)
a687059c 1444{
11343788 1445 dTHR;
a687059c 1446 va_list args;
de3bb511 1447 char *message;
748a9306
LW		 1448 HV *stash;
1449 GV *gv;
1450 CV *cv;
06bf62c7
GS		 1451 SV *msv;
1452 STRLEN msglen;
a687059c 1453
8990e307 1454 va_start(args, pat);
06bf62c7
GS		 1455 msv = mess(pat, &args);
1456 message = SvPV(msv,msglen);
a687059c 1457 va_end(args);
8b73bbec 1458 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
3280af22 1459 if (PL_diehook) {
1738f5c4 1460 /* sv_2cv might call croak() */
3280af22 1461 SV *olddiehook = PL_diehook;
1738f5c4 1462 ENTER;
3280af22
NIS		 1463 SAVESPTR(PL_diehook);
1464 PL_diehook = Nullsv;
20cec16a 1465 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS		 1466 LEAVE;
1467 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1468 dSP;
774d564b 1469 SV *msg;
1470
1471 ENTER;
06bf62c7 1472 msg = newSVpvn(message, msglen);
774d564b 1473 SvREADONLY_on(msg);
1474 SAVEFREESV(msg);
20cec16a 1475
e788e7d3 1476 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1477 PUSHMARK(SP);
1738f5c4 1478 XPUSHs(msg);
20cec16a 1479 PUTBACK;
864dbfa3 1480 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1481 POPSTACK;
774d564b 1482 LEAVE;
20cec16a 1483 }
748a9306 1484 }
3280af22 1485 if (PL_in_eval) {
06bf62c7 1486 PL_restartop = die_where(message, msglen);
6224f72b 1487 JMPENV_JUMP(3);
a0d0e21e 1488 }
d175a3f0
GS		 1489 {
1490#ifdef USE_SFIO
1491 /* SFIO can really mess with your errno */
1492 int e = errno;
1493#endif
06bf62c7 1494 PerlIO_write(PerlIO_stderr(), message, msglen);
d175a3f0
GS		 1495 (void)PerlIO_flush(PerlIO_stderr());
1496#ifdef USE_SFIO
1497 errno = e;
1498#endif
1499 }
f86702cc 1500 my_failure_exit();
a687059c
LW		 1501}
1502
8990e307 1503void
864dbfa3 1504Perl_warn(pTHX_ const char* pat,...)
a687059c
LW		 1505{
1506 va_list args;
de3bb511 1507 char *message;
748a9306
LW		 1508 HV *stash;
1509 GV *gv;
1510 CV *cv;
06bf62c7
GS		 1511 SV *msv;
1512 STRLEN msglen;
a687059c 1513
8990e307 1514 va_start(args, pat);
06bf62c7
GS		 1515 msv = mess(pat, &args);
1516 message = SvPV(msv, msglen);
a687059c
LW		 1517 va_end(args);
1518
3280af22 1519 if (PL_warnhook) {
1738f5c4 1520 /* sv_2cv might call warn() */
11343788 1521 dTHR;
3280af22 1522 SV *oldwarnhook = PL_warnhook;
1738f5c4 1523 ENTER;
3280af22
NIS		 1524 SAVESPTR(PL_warnhook);
1525 PL_warnhook = Nullsv;
20cec16a 1526 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1527 LEAVE;
1528 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1529 dSP;
774d564b 1530 SV *msg;
1531
1532 ENTER;
06bf62c7 1533 msg = newSVpvn(message, msglen);
774d564b 1534 SvREADONLY_on(msg);
1535 SAVEFREESV(msg);
1536
e788e7d3 1537 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1538 PUSHMARK(SP);
774d564b 1539 XPUSHs(msg);
20cec16a 1540 PUTBACK;
864dbfa3 1541 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1542 POPSTACK;
774d564b 1543 LEAVE;
20cec16a 1544 return;
1545 }
748a9306 1546 }
06bf62c7 1547 PerlIO_write(PerlIO_stderr(), message, msglen);
a687059c 1548#ifdef LEAKTEST
8c52afec
IZ		 1549 DEBUG_L(*message == '!'
1550 ? (xstat(message[1]=='!'
1551 ? (message[2]=='!' ? 2 : 1)
1552 : 0)
1553 , 0)
1554 : 0);
a687059c 1555#endif
20cec16a 1556 (void)PerlIO_flush(PerlIO_stderr());
a687059c 1557}
8d063cd8 1558
599cee73 1559void
864dbfa3 1560Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73 1561{
d008e5eb 1562 dTHR;
599cee73
PM		 1563 va_list args;
1564 char *message;
1565 HV *stash;
1566 GV *gv;
1567 CV *cv;
06bf62c7
GS		 1568 SV *msv;
1569 STRLEN msglen;
599cee73
PM		 1570
1571 va_start(args, pat);
06bf62c7
GS		 1572 msv = mess(pat, &args);
1573 message = SvPV(msv, msglen);
599cee73
PM		 1574 va_end(args);
1575
1576 if (ckDEAD(err)) {
1577#ifdef USE_THREADS
d008e5eb 1578 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
599cee73
PM		 1579#endif /* USE_THREADS */
1580 if (PL_diehook) {
1581 /* sv_2cv might call croak() */
1582 SV *olddiehook = PL_diehook;
1583 ENTER;
1584 SAVESPTR(PL_diehook);
1585 PL_diehook = Nullsv;
1586 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1587 LEAVE;
1588 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1589 dSP;
1590 SV *msg;
1591
1592 ENTER;
06bf62c7 1593 msg = newSVpvn(message, msglen);
599cee73
PM		 1594 SvREADONLY_on(msg);
1595 SAVEFREESV(msg);
1596
1597 PUSHMARK(sp);
1598 XPUSHs(msg);
1599 PUTBACK;
864dbfa3 1600 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1601
1602 LEAVE;
1603 }
1604 }
1605 if (PL_in_eval) {
06bf62c7 1606 PL_restartop = die_where(message, msglen);
599cee73
PM		 1607 JMPENV_JUMP(3);
1608 }
06bf62c7 1609 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1610 (void)PerlIO_flush(PerlIO_stderr());
1611 my_failure_exit();
1612
1613 }
1614 else {
1615 if (PL_warnhook) {
1616 /* sv_2cv might call warn() */
1617 dTHR;
1618 SV *oldwarnhook = PL_warnhook;
1619 ENTER;
1620 SAVESPTR(PL_warnhook);
1621 PL_warnhook = Nullsv;
1622 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1623 LEAVE;
1624 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1625 dSP;
1626 SV *msg;
1627
1628 ENTER;
06bf62c7 1629 msg = newSVpvn(message, msglen);
599cee73
PM		 1630 SvREADONLY_on(msg);
1631 SAVEFREESV(msg);
1632
1633 PUSHMARK(sp);
1634 XPUSHs(msg);
1635 PUTBACK;
864dbfa3 1636 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1637
1638 LEAVE;
1639 return;
1640 }
1641 }
06bf62c7 1642 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1643#ifdef LEAKTEST
1644 DEBUG_L(xstat());
1645#endif
1646 (void)PerlIO_flush(PerlIO_stderr());
1647 }
1648}
1649
a0d0e21e 1650#ifndef VMS /* VMS' my_setenv() is in VMS.c */
f89d6eaa 1651#if !defined(WIN32) && !defined(CYGWIN32)
8d063cd8 1652void
864dbfa3 1653Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1654{
f2517201
GS		 1655#ifndef PERL_USE_SAFE_PUTENV
1656 /* most putenv()s leak, so we manipulate environ directly */
79072805 1657 register I32 i=setenv_getix(nam); /* where does it go? */
8d063cd8 1658
3280af22 1659 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1660 I32 j;
1661 I32 max;
fe14fcc3
LW		 1662 char **tmpenv;
1663
de3bb511 1664 /*SUPPRESS 530*/
fe14fcc3 1665 for (max = i; environ[max]; max++) ;
f2517201
GS		 1666 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1667 for (j=0; j<max; j++) { /* copy environment */
1668 tmpenv[j] = (char*)safesysmalloc((strlen(environ[j])+1)*sizeof(char));
1669 strcpy(tmpenv[j], environ[j]);
1670 }
fe14fcc3
LW		 1671 tmpenv[max] = Nullch;
1672 environ = tmpenv; /* tell exec where it is now */
1673 }
a687059c 1674 if (!val) {
f2517201 1675 safesysfree(environ[i]);
a687059c
LW		 1676 while (environ[i]) {
1677 environ[i] = environ[i+1];
1678 i++;
1679 }
1680 return;
1681 }
8d063cd8 1682 if (!environ[i]) { /* does not exist yet */
f2517201 1683 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1684 environ[i+1] = Nullch; /* make sure it's null terminated */
1685 }
fe14fcc3 1686 else
f2517201
GS		 1687 safesysfree(environ[i]);
1688 environ[i] = (char*)safesysmalloc((strlen(nam)+strlen(val)+2) * sizeof(char));
1689
62b28dd9 1690#ifndef MSDOS
a687059c 1691 (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
62b28dd9
LW		 1692#else
1693 /* MS-DOS requires environment variable names to be in uppercase */
fe14fcc3
LW		 1694 /* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but
1695 * some utilities and applications may break because they only look
1696 * for upper case strings. (Fixed strupr() bug here.)]
1697 */
1698 strcpy(environ[i],nam); strupr(environ[i]);
62b28dd9
LW		 1699 (void)sprintf(environ[i] + strlen(nam),"=%s",val);
1700#endif /* MSDOS */
f2517201
GS		 1701
1702#else /* PERL_USE_SAFE_PUTENV */
1703 char *new_env;
1704
1705 new_env = (char*)safesysmalloc((strlen(nam) + strlen(val) + 2) * sizeof(char));
1706#ifndef MSDOS
1707 (void)sprintf(new_env,"%s=%s",nam,val);/* all that work just for this */
1708#else
1709 strcpy(new_env,nam); strupr(new_env);
1710 (void)sprintf(new_env + strlen(nam),"=%s",val);
1711#endif
1712 (void)putenv(new_env);
1713#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW		 1714}
1715
3e3baf6d 1716#else /* if WIN32 */
68dc0745 1717
1718void
864dbfa3 1719Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 1720{
3e3baf6d
TB		 1721
1722#ifdef USE_WIN32_RTL_ENV
1723
68dc0745 1724 register char *envstr;
1725 STRLEN namlen = strlen(nam);
3e3baf6d
TB		 1726 STRLEN vallen;
1727 char *oldstr = environ[setenv_getix(nam)];
1728
1729 /* putenv() has totally broken semantics in both the Borland
1730 * and Microsoft CRTLs. They either store the passed pointer in
1731 * the environment without making a copy, or make a copy and don't
1732 * free it. And on top of that, they dont free() old entries that
1733 * are being replaced/deleted. This means the caller must
1734 * free any old entries somehow, or we end up with a memory
1735 * leak every time my_setenv() is called. One might think
1736 * one could directly manipulate environ[], like the UNIX code
1737 * above, but direct changes to environ are not allowed when
1738 * calling putenv(), since the RTLs maintain an internal
1739 * *copy* of environ[]. Bad, bad, *bad* stink.
1740 * GSAR 97-06-07
1741 */
68dc0745 1742
3e3baf6d
TB		 1743 if (!val) {
1744 if (!oldstr)
1745 return;
1746 val = "";
1747 vallen = 0;
1748 }
1749 else
1750 vallen = strlen(val);
f2517201 1751 envstr = (char*)safesysmalloc((namlen + vallen + 3) * sizeof(char));
68dc0745 1752 (void)sprintf(envstr,"%s=%s",nam,val);
76e3520e 1753 (void)PerlEnv_putenv(envstr);
3e3baf6d 1754 if (oldstr)
f2517201 1755 safesysfree(oldstr);
3e3baf6d 1756#ifdef _MSC_VER
f2517201 1757 safesysfree(envstr); /* MSVCRT leaks without this */
3e3baf6d
TB		 1758#endif
1759
1760#else /* !USE_WIN32_RTL_ENV */
1761
ac5c734f
GS		 1762 register char *envstr;
1763 STRLEN len = strlen(nam) + 3;
1764 if (!val) {
1765 val = "";
1766 }
1767 len += strlen(val);
1768 New(904, envstr, len, char);
1769 (void)sprintf(envstr,"%s=%s",nam,val);
1770 (void)PerlEnv_putenv(envstr);
1771 Safefree(envstr);
3e3baf6d
TB		 1772
1773#endif
1774}
1775
1776#endif /* WIN32 */
1777
1778I32
864dbfa3 1779Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB		 1780{
1781 register I32 i, len = strlen(nam);
1782
1783 for (i = 0; environ[i]; i++) {
1784 if (
1785#ifdef WIN32
1786 strnicmp(environ[i],nam,len) == 0
1787#else
1788 strnEQ(environ[i],nam,len)
1789#endif
1790 && environ[i][len] == '=')
1791 break; /* strnEQ must come first to avoid */
1792 } /* potential SEGV's */
1793 return i;
68dc0745 1794}
1795
a0d0e21e 1796#endif /* !VMS */
378cc40b 1797
16d20bd9 1798#ifdef UNLINK_ALL_VERSIONS
79072805 1799I32
864dbfa3 1800Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1801{
79072805 1802 I32 i;
378cc40b 1803
6ad3d225 1804 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1805 return i ? 0 : -1;
1806}
1807#endif
1808
85e6fe83 1809#if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY)
378cc40b 1810char *
864dbfa3 1811Perl_my_bcopy(pTHX_ register const char *from,register char *to,register I32 len)
378cc40b
LW		 1812{
1813 char *retval = to;
1814
7c0587c8
LW		 1815 if (from - to >= 0) {
1816 while (len--)
1817 *to++ = *from++;
1818 }
1819 else {
1820 to += len;
1821 from += len;
1822 while (len--)
faf8582f 1823 *(--to) = *(--from);
7c0587c8 1824 }
378cc40b
LW		 1825 return retval;
1826}
ffed7fef 1827#endif
378cc40b 1828
fc36a67e 1829#ifndef HAS_MEMSET
1830void *
864dbfa3 1831Perl_my_memset(pTHX_ register char *loc, register I32 ch, register I32 len)
fc36a67e 1832{
1833 char *retval = loc;
1834
1835 while (len--)
1836 *loc++ = ch;
1837 return retval;
1838}
1839#endif
1840
7c0587c8 1841#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1842char *
864dbfa3 1843Perl_my_bzero(pTHX_ register char *loc, register I32 len)
378cc40b
LW		 1844{
1845 char *retval = loc;
1846
1847 while (len--)
1848 *loc++ = 0;
1849 return retval;
1850}
1851#endif
7c0587c8 1852
36477c24 1853#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1854I32
864dbfa3 1855Perl_my_memcmp(pTHX_ const char *s1, const char *s2, register I32 len)
7c0587c8 1856{
36477c24 1857 register U8 *a = (U8 *)s1;
1858 register U8 *b = (U8 *)s2;
79072805 1859 register I32 tmp;
7c0587c8
LW		 1860
1861 while (len--) {
36477c24 1862 if (tmp = *a++ - *b++)
7c0587c8
LW		 1863 return tmp;
1864 }
1865 return 0;
1866}
36477c24 1867#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1868
fe14fcc3 1869#ifndef HAS_VPRINTF
a687059c 1870
85e6fe83 1871#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1872char *
1873#else
1874int
1875#endif
08105a92 1876vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1877{
1878 FILE fakebuf;
1879
1880 fakebuf._ptr = dest;
1881 fakebuf._cnt = 32767;
35c8bce7
LW		 1882#ifndef _IOSTRG
1883#define _IOSTRG 0
1884#endif
a687059c
LW		 1885 fakebuf._flag = _IOWRT|_IOSTRG;
1886 _doprnt(pat, args, &fakebuf); /* what a kludge */
1887 (void)putc('\0', &fakebuf);
85e6fe83 1888#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1889 return(dest);
1890#else
1891 return 0; /* perl doesn't use return value */
1892#endif
1893}
1894
fe14fcc3 1895#endif /* HAS_VPRINTF */
a687059c
LW		 1896
1897#ifdef MYSWAP
ffed7fef 1898#if BYTEORDER != 0x4321
a687059c 1899short
864dbfa3 1900Perl_my_swap(pTHX_ short s)
a687059c
LW		 1901{
1902#if (BYTEORDER & 1) == 0
1903 short result;
1904
1905 result = ((s & 255) << 8) + ((s >> 8) & 255);
1906 return result;
1907#else
1908 return s;
1909#endif
1910}
1911
1912long
864dbfa3 1913Perl_my_htonl(pTHX_ long l)
a687059c
LW		 1914{
1915 union {
1916 long result;
ffed7fef 1917 char c[sizeof(long)];
a687059c
LW		 1918 } u;
1919
ffed7fef 1920#if BYTEORDER == 0x1234
a687059c
LW		 1921 u.c[0] = (l >> 24) & 255;
1922 u.c[1] = (l >> 16) & 255;
1923 u.c[2] = (l >> 8) & 255;
1924 u.c[3] = l & 255;
1925 return u.result;
1926#else
ffed7fef 1927#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
463ee0b2 1928 croak("Unknown BYTEORDER\n");
a687059c 1929#else
79072805
LW		 1930 register I32 o;
1931 register I32 s;
a687059c 1932
ffed7fef
LW		 1933 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1934 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 1935 }
1936 return u.result;
1937#endif
1938#endif
1939}
1940
1941long
864dbfa3 1942Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 1943{
1944 union {
1945 long l;
ffed7fef 1946 char c[sizeof(long)];
a687059c
LW		 1947 } u;
1948
ffed7fef 1949#if BYTEORDER == 0x1234
a687059c
LW		 1950 u.c[0] = (l >> 24) & 255;
1951 u.c[1] = (l >> 16) & 255;
1952 u.c[2] = (l >> 8) & 255;
1953 u.c[3] = l & 255;
1954 return u.l;
1955#else
ffed7fef 1956#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
463ee0b2 1957 croak("Unknown BYTEORDER\n");
a687059c 1958#else
79072805
LW		 1959 register I32 o;
1960 register I32 s;
a687059c
LW		 1961
1962 u.l = l;
1963 l = 0;
ffed7fef
LW		 1964 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1965 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 1966 }
1967 return l;
1968#endif
1969#endif
1970}
1971
ffed7fef 1972#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 1973#endif /* MYSWAP */
1974
1975/*
1976 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1977 * If these functions are defined,
1978 * the BYTEORDER is neither 0x1234 nor 0x4321.
1979 * However, this is not assumed.
1980 * -DWS
1981 */
1982
1983#define HTOV(name,type) \
1984 type \
ba106d47 1985 name (register type n) \
988174c1
LW		 1986 { \
1987 union { \
1988 type value; \
1989 char c[sizeof(type)]; \
1990 } u; \
79072805
LW		 1991 register I32 i; \
1992 register I32 s; \
988174c1
LW		 1993 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1994 u.c[i] = (n >> s) & 0xFF; \
1995 } \
1996 return u.value; \
1997 }
1998
1999#define VTOH(name,type) \
2000 type \
ba106d47 2001 name (register type n) \
988174c1
LW		 2002 { \
2003 union { \
2004 type value; \
2005 char c[sizeof(type)]; \
2006 } u; \
79072805
LW		 2007 register I32 i; \
2008 register I32 s; \
988174c1
LW		 2009 u.value = n; \
2010 n = 0; \
2011 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2012 n += (u.c[i] & 0xFF) << s; \
2013 } \
2014 return n; \
2015 }
2016
2017#if defined(HAS_HTOVS) && !defined(htovs)
2018HTOV(htovs,short)
2019#endif
2020#if defined(HAS_HTOVL) && !defined(htovl)
2021HTOV(htovl,long)
2022#endif
2023#if defined(HAS_VTOHS) && !defined(vtohs)
2024VTOH(vtohs,short)
2025#endif
2026#if defined(HAS_VTOHL) && !defined(vtohl)
2027VTOH(vtohl,long)
2028#endif
a687059c 2029
5f05dabc 2030 /* VMS' my_popen() is in VMS.c, same with OS/2. */
092bebab 2031#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
760ac839 2032PerlIO *
864dbfa3 2033Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2034{
2035 int p[2];
8ac85365 2036 register I32 This, that;
79072805
LW		 2037 register I32 pid;
2038 SV *sv;
1738f5c4 2039 I32 doexec = strNE(cmd,"-");
e446cec8
IZ		 2040 I32 did_pipes = 0;
2041 int pp[2];
a687059c 2042
45bc9206 2043 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2044#ifdef OS2
2045 if (doexec) {
2046 return my_syspopen(cmd,mode);
2047 }
2048#endif
8ac85365
NIS		 2049 This = (*mode == 'w');
2050 that = !This;
3280af22 2051 if (doexec && PL_tainting) {
bbce6d69 2052 taint_env();
2053 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2054 }
c2267164
IZ		 2055 if (PerlProc_pipe(p) < 0)
2056 return Nullfp;
e446cec8
IZ		 2057 if (doexec && PerlProc_pipe(pp) >= 0)
2058 did_pipes = 1;
a687059c
LW		 2059 while ((pid = (doexec?vfork():fork())) < 0) {
2060 if (errno != EAGAIN) {
6ad3d225 2061 PerlLIO_close(p[This]);
e446cec8
IZ		 2062 if (did_pipes) {
2063 PerlLIO_close(pp[0]);
2064 PerlLIO_close(pp[1]);
2065 }
a687059c 2066 if (!doexec)
463ee0b2 2067 croak("Can't fork");
a687059c
LW		 2068 return Nullfp;
2069 }
2070 sleep(5);
2071 }
2072 if (pid == 0) {
79072805
LW		 2073 GV* tmpgv;
2074
30ac6d9b
GS		 2075#undef THIS
2076#undef THAT
a687059c 2077#define THIS that
8ac85365 2078#define THAT This
6ad3d225 2079 PerlLIO_close(p[THAT]);
e446cec8
IZ		 2080 if (did_pipes) {
2081 PerlLIO_close(pp[0]);
2082#if defined(HAS_FCNTL) && defined(F_SETFD)
2083 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2084#endif
2085 }
a687059c 2086 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2087 PerlLIO_dup2(p[THIS], *mode == 'r');
2088 PerlLIO_close(p[THIS]);
a687059c 2089 }
4435c477 2090#ifndef OS2
a687059c 2091 if (doexec) {
a0d0e21e 2092#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2093 int fd;
2094
2095#ifndef NOFILE
2096#define NOFILE 20
2097#endif
6b88bc9c 2098 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
e446cec8
IZ		 2099 if (fd != pp[1])
2100 PerlLIO_close(fd);
ae986130 2101#endif
e446cec8 2102 do_exec3(cmd,pp[1],did_pipes); /* may or may not use the shell */
6ad3d225 2103 PerlProc__exit(1);
a687059c 2104 }
4435c477 2105#endif /* defined OS2 */
de3bb511 2106 /*SUPPRESS 560*/
85e6fe83 2107 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
1e422769 2108 sv_setiv(GvSV(tmpgv), (IV)getpid());
3280af22
NIS		 2109 PL_forkprocess = 0;
2110 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2111 return Nullfp;
2112#undef THIS
2113#undef THAT
2114 }
62b28dd9 2115 do_execfree(); /* free any memory malloced by child on vfork */
6ad3d225 2116 PerlLIO_close(p[that]);
e446cec8
IZ		 2117 if (did_pipes)
2118 PerlLIO_close(pp[1]);
8ac85365 2119 if (p[that] < p[This]) {
6ad3d225
GS		 2120 PerlLIO_dup2(p[This], p[that]);
2121 PerlLIO_close(p[This]);
8ac85365 2122 p[This] = p[that];
62b28dd9 2123 }
3280af22 2124 sv = *av_fetch(PL_fdpid,p[This],TRUE);
a0d0e21e 2125 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2126 SvIVX(sv) = pid;
3280af22 2127 PL_forkprocess = pid;
e446cec8
IZ		 2128 if (did_pipes && pid > 0) {
2129 int errkid;
2130 int n = 0, n1;
2131
2132 while (n < sizeof(int)) {
2133 n1 = PerlLIO_read(pp[0],
2134 (void*)(((char*)&errkid)+n),
2135 (sizeof(int)) - n);
2136 if (n1 <= 0)
2137 break;
2138 n += n1;
2139 }
2140 if (n) { /* Error */
2141 if (n != sizeof(int))
2142 croak("panic: kid popen errno read");
2143 PerlLIO_close(pp[0]);
2144 errno = errkid; /* Propagate errno from kid */
2145 return Nullfp;
2146 }
2147 }
2148 if (did_pipes)
2149 PerlLIO_close(pp[0]);
8ac85365 2150 return PerlIO_fdopen(p[This], mode);
a687059c 2151}
7c0587c8 2152#else
55497cff 2153#if defined(atarist) || defined(DJGPP)
7c0587c8 2154FILE *popen();
760ac839 2155PerlIO *
864dbfa3 2156Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2157{
760ac839 2158 /* Needs work for PerlIO ! */
55497cff 2159 /* used 0 for 2nd parameter to PerlIO-exportFILE; apparently not used */
45bc9206 2160 PERL_FLUSHALL_FOR_CHILD;
55497cff 2161 return popen(PerlIO_exportFILE(cmd, 0), mode);
7c0587c8
LW		 2162}
2163#endif
2164
2165#endif /* !DOSISH */
a687059c 2166
748a9306 2167#ifdef DUMP_FDS
35ff7856 2168void
864dbfa3 2169Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2170{
2171 int fd;
2172 struct stat tmpstatbuf;
2173
760ac839 2174 PerlIO_printf(PerlIO_stderr(),"%s", s);
ae986130 2175 for (fd = 0; fd < 32; fd++) {
6ad3d225 2176 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
760ac839 2177 PerlIO_printf(PerlIO_stderr()," %d",fd);
ae986130 2178 }
760ac839 2179 PerlIO_printf(PerlIO_stderr(),"\n");
ae986130 2180}
35ff7856 2181#endif /* DUMP_FDS */
ae986130 2182
fe14fcc3 2183#ifndef HAS_DUP2
fec02dd3 2184int
ba106d47 2185dup2(int oldfd, int newfd)
a687059c 2186{
a0d0e21e 2187#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2188 if (oldfd == newfd)
2189 return oldfd;
6ad3d225 2190 PerlLIO_close(newfd);
fec02dd3 2191 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2192#else
fc36a67e 2193#define DUP2_MAX_FDS 256
2194 int fdtmp[DUP2_MAX_FDS];
79072805 2195 I32 fdx = 0;
ae986130
LW		 2196 int fd;
2197
fe14fcc3 2198 if (oldfd == newfd)
fec02dd3 2199 return oldfd;
6ad3d225 2200 PerlLIO_close(newfd);
fc36a67e 2201 /* good enough for low fd's... */
6ad3d225 2202 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2203 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2204 PerlLIO_close(fd);
fc36a67e 2205 fd = -1;
2206 break;
2207 }
ae986130 2208 fdtmp[fdx++] = fd;
fc36a67e 2209 }
ae986130 2210 while (fdx > 0)
6ad3d225 2211 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2212 return fd;
62b28dd9 2213#endif
a687059c
LW		 2214}
2215#endif
2216
ff68c719 2217
2218#ifdef HAS_SIGACTION
2219
2220Sighandler_t
864dbfa3 2221Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2222{
2223 struct sigaction act, oact;
2224
2225 act.sa_handler = handler;
2226 sigemptyset(&act.sa_mask);
2227 act.sa_flags = 0;
2228#ifdef SA_RESTART
2229 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2230#endif
85264bed
CS		 2231#ifdef SA_NOCLDWAIT
2232 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2233 act.sa_flags |= SA_NOCLDWAIT;
2234#endif
ff68c719 2235 if (sigaction(signo, &act, &oact) == -1)
36477c24 2236 return SIG_ERR;
ff68c719 2237 else
36477c24 2238 return oact.sa_handler;
ff68c719 2239}
2240
2241Sighandler_t
864dbfa3 2242Perl_rsignal_state(pTHX_ int signo)
ff68c719 2243{
2244 struct sigaction oact;
2245
2246 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2247 return SIG_ERR;
2248 else
2249 return oact.sa_handler;
2250}
2251
2252int
864dbfa3 2253Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2254{
2255 struct sigaction act;
2256
2257 act.sa_handler = handler;
2258 sigemptyset(&act.sa_mask);
2259 act.sa_flags = 0;
2260#ifdef SA_RESTART
2261 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2262#endif
85264bed
CS		 2263#ifdef SA_NOCLDWAIT
2264 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2265 act.sa_flags |= SA_NOCLDWAIT;
2266#endif
ff68c719 2267 return sigaction(signo, &act, save);
2268}
2269
2270int
864dbfa3 2271Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2272{
2273 return sigaction(signo, save, (struct sigaction *)NULL);
2274}
2275
2276#else /* !HAS_SIGACTION */
2277
2278Sighandler_t
864dbfa3 2279Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2280{
6ad3d225 2281 return PerlProc_signal(signo, handler);
ff68c719 2282}
2283
2284static int sig_trapped;
2285
2286static
2287Signal_t
4e35701f 2288sig_trap(int signo)
ff68c719 2289{
2290 sig_trapped++;
2291}
2292
2293Sighandler_t
864dbfa3 2294Perl_rsignal_state(pTHX_ int signo)
ff68c719 2295{
2296 Sighandler_t oldsig;
2297
2298 sig_trapped = 0;
6ad3d225
GS		 2299 oldsig = PerlProc_signal(signo, sig_trap);
2300 PerlProc_signal(signo, oldsig);
ff68c719 2301 if (sig_trapped)
6ad3d225 2302 PerlProc_kill(getpid(), signo);
ff68c719 2303 return oldsig;
2304}
2305
2306int
864dbfa3 2307Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2308{
6ad3d225 2309 *save = PerlProc_signal(signo, handler);
ff68c719 2310 return (*save == SIG_ERR) ? -1 : 0;
2311}
2312
2313int
864dbfa3 2314Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2315{
6ad3d225 2316 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2317}
2318
2319#endif /* !HAS_SIGACTION */
2320
5f05dabc 2321 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
092bebab 2322#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
79072805 2323I32
864dbfa3 2324Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2325{
ff68c719 2326 Sigsave_t hstat, istat, qstat;
a687059c 2327 int status;
a0d0e21e 2328 SV **svp;
20188a90 2329 int pid;
1d3434b8 2330 int pid2;
03136e13
CS		 2331 bool close_failed;
2332 int saved_errno;
2333#ifdef VMS
2334 int saved_vaxc_errno;
2335#endif
22fae026
TM		 2336#ifdef WIN32
2337 int saved_win32_errno;
2338#endif
a687059c 2339
3280af22 2340 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
748a9306 2341 pid = (int)SvIVX(*svp);
a0d0e21e 2342 SvREFCNT_dec(*svp);
3280af22 2343 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2344#ifdef OS2
2345 if (pid == -1) { /* Opened by popen. */
2346 return my_syspclose(ptr);
2347 }
2348#endif
03136e13
CS		 2349 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2350 saved_errno = errno;
2351#ifdef VMS
2352 saved_vaxc_errno = vaxc$errno;
2353#endif
22fae026
TM		 2354#ifdef WIN32
2355 saved_win32_errno = GetLastError();
2356#endif
03136e13 2357 }
7c0587c8 2358#ifdef UTS
6ad3d225 2359 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2360#endif
ff68c719 2361 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2362 rsignal_save(SIGINT, SIG_IGN, &istat);
2363 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
748a9306 2364 do {
1d3434b8
GS		 2365 pid2 = wait4pid(pid, &status, 0);
2366 } while (pid2 == -1 && errno == EINTR);
ff68c719 2367 rsignal_restore(SIGHUP, &hstat);
2368 rsignal_restore(SIGINT, &istat);
2369 rsignal_restore(SIGQUIT, &qstat);
03136e13
CS		 2370 if (close_failed) {
2371 SETERRNO(saved_errno, saved_vaxc_errno);
2372 return -1;
2373 }
1d3434b8 2374 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2375}
4633a7c4
LW		 2376#endif /* !DOSISH */
2377
8736538c 2378#if !defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(CYGWIN32)
79072805 2379I32
864dbfa3 2380Perl_wait4pid(pTHX_ int pid, int *statusp, int flags)
20188a90 2381{
79072805
LW		 2382 SV *sv;
2383 SV** svp;
fc36a67e 2384 char spid[TYPE_CHARS(int)];
20188a90
LW		 2385
2386 if (!pid)
2387 return -1;
20188a90
LW		 2388 if (pid > 0) {
2389 sprintf(spid, "%d", pid);
3280af22
NIS		 2390 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2391 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2392 *statusp = SvIVX(*svp);
3280af22 2393 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2394 return pid;
2395 }
2396 }
2397 else {
79072805 2398 HE *entry;
20188a90 2399
3280af22
NIS		 2400 hv_iterinit(PL_pidstatus);
2401 if (entry = hv_iternext(PL_pidstatus)) {
a0d0e21e 2402 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2403 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2404 *statusp = SvIVX(sv);
20188a90 2405 sprintf(spid, "%d", pid);
3280af22 2406 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2407 return pid;
2408 }
2409 }
79072805 2410#ifdef HAS_WAITPID
367f3c24
IZ		 2411# ifdef HAS_WAITPID_RUNTIME
2412 if (!HAS_WAITPID_RUNTIME)
2413 goto hard_way;
2414# endif
f55ee38a 2415 return PerlProc_waitpid(pid,statusp,flags);
367f3c24
IZ		 2416#endif
2417#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
a0d0e21e 2418 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
367f3c24
IZ		 2419#endif
2420#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2421 hard_way:
a0d0e21e
LW		 2422 {
2423 I32 result;
2424 if (flags)
2425 croak("Can't do waitpid with flags");
2426 else {
76e3520e 2427 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2428 pidgone(result,*statusp);
2429 if (result < 0)
2430 *statusp = -1;
2431 }
2432 return result;
a687059c
LW		 2433 }
2434#endif
a687059c 2435}
2d7a9237 2436#endif /* !DOSISH || OS2 || WIN32 */
a687059c 2437
7c0587c8 2438void
de3bb511 2439/*SUPPRESS 590*/
864dbfa3 2440Perl_pidgone(pTHX_ int pid, int status)
a687059c 2441{
79072805 2442 register SV *sv;
fc36a67e 2443 char spid[TYPE_CHARS(int)];
a687059c 2444
20188a90 2445 sprintf(spid, "%d", pid);
3280af22 2446 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2447 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2448 SvIVX(sv) = status;
20188a90 2449 return;
a687059c
LW		 2450}
2451
55497cff 2452#if defined(atarist) || defined(OS2) || defined(DJGPP)
7c0587c8 2453int pclose();
ddcf38b7
IZ		 2454#ifdef HAS_FORK
2455int /* Cannot prototype with I32
2456 in os2ish.h. */
ba106d47 2457my_syspclose(PerlIO *ptr)
ddcf38b7 2458#else
79072805 2459I32
864dbfa3 2460Perl_my_pclose(pTHX_ PerlIO *ptr)
ddcf38b7 2461#endif
a687059c 2462{
760ac839
LW		 2463 /* Needs work for PerlIO ! */
2464 FILE *f = PerlIO_findFILE(ptr);
2465 I32 result = pclose(f);
2466 PerlIO_releaseFILE(ptr,f);
2467 return result;
a687059c 2468}
7c0587c8 2469#endif
9f68db38
LW		 2470
2471void
864dbfa3 2472Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2473{
79072805 2474 register I32 todo;
08105a92 2475 register const char *frombase = from;
9f68db38
LW		 2476
2477 if (len == 1) {
08105a92 2478 register const char c = *from;
9f68db38 2479 while (count-- > 0)
5926133d 2480 *to++ = c;
9f68db38
LW		 2481 return;
2482 }
2483 while (count-- > 0) {
2484 for (todo = len; todo > 0; todo--) {
2485 *to++ = *from++;
2486 }
2487 from = frombase;
2488 }
2489}
0f85fab0 2490
463ee0b2 2491U32
864dbfa3 2492Perl_cast_ulong(pTHX_ double f)
0f85fab0
LW		 2493{
2494 long along;
2495
27e2fb84 2496#if CASTFLAGS & 2
34de22dd
LW		 2497# define BIGDOUBLE 2147483648.0
2498 if (f >= BIGDOUBLE)
2499 return (unsigned long)(f-(long)(f/BIGDOUBLE)*BIGDOUBLE)|0x80000000;
2500#endif
0f85fab0
LW		 2501 if (f >= 0.0)
2502 return (unsigned long)f;
2503 along = (long)f;
2504 return (unsigned long)along;
2505}
ed6116ce 2506# undef BIGDOUBLE
5d94fbed 2507
5d94fbed
AD		 2508/* Unfortunately, on some systems the cast_uv() function doesn't
2509 work with the system-supplied definition of ULONG_MAX. The
2510 comparison (f >= ULONG_MAX) always comes out true. It must be a
2511 problem with the compiler constant folding.
2512
2513 In any case, this workaround should be fine on any two's complement
2514 system. If it's not, supply a '-DMY_ULONG_MAX=whatever' in your
2515 ccflags.
2516 --Andy Dougherty <doughera@lafcol.lafayette.edu>
2517*/
1eb770ff 2518
2519/* Code modified to prefer proper named type ranges, I32, IV, or UV, instead
2520 of LONG_(MIN/MAX).
2521 -- Kenneth Albanowski <kjahds@kjahds.com>
2522*/
2523
20cec16a 2524#ifndef MY_UV_MAX
2525# define MY_UV_MAX ((UV)IV_MAX * (UV)2 + (UV)1)
5d94fbed
AD		 2526#endif
2527
ed6116ce 2528I32
864dbfa3 2529Perl_cast_i32(pTHX_ double f)
ed6116ce 2530{
20cec16a 2531 if (f >= I32_MAX)
2532 return (I32) I32_MAX;
2533 if (f <= I32_MIN)
2534 return (I32) I32_MIN;
ed6116ce
LW		 2535 return (I32) f;
2536}
a0d0e21e
LW		 2537
2538IV
864dbfa3 2539Perl_cast_iv(pTHX_ double f)
a0d0e21e 2540{
25da4f38
IZ		 2541 if (f >= IV_MAX) {
2542 UV uv;
2543
2544 if (f >= (double)UV_MAX)
2545 return (IV) UV_MAX;
2546 uv = (UV) f;
2547 return (IV)uv;
2548 }
20cec16a 2549 if (f <= IV_MIN)
2550 return (IV) IV_MIN;
a0d0e21e
LW		 2551 return (IV) f;
2552}
5d94fbed
AD		 2553
2554UV
864dbfa3 2555Perl_cast_uv(pTHX_ double f)
5d94fbed 2556{
20cec16a 2557 if (f >= MY_UV_MAX)
2558 return (UV) MY_UV_MAX;
25da4f38
IZ		 2559 if (f < 0) {
2560 IV iv;
2561
2562 if (f < IV_MIN)
2563 return (UV)IV_MIN;
2564 iv = (IV) f;
2565 return (UV) iv;
2566 }
5d94fbed
AD		 2567 return (UV) f;
2568}
2569
fe14fcc3 2570#ifndef HAS_RENAME
79072805 2571I32
864dbfa3 2572Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 2573{
93a17b20
LW		 2574 char *fa = strrchr(a,'/');
2575 char *fb = strrchr(b,'/');
62b28dd9
LW		 2576 struct stat tmpstatbuf1;
2577 struct stat tmpstatbuf2;
46fc3d4c 2578 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2579
2580 if (fa)
2581 fa++;
2582 else
2583 fa = a;
2584 if (fb)
2585 fb++;
2586 else
2587 fb = b;
2588 if (strNE(a,b))
2589 return FALSE;
2590 if (fa == a)
46fc3d4c 2591 sv_setpv(tmpsv, ".");
62b28dd9 2592 else
46fc3d4c 2593 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 2594 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2595 return FALSE;
2596 if (fb == b)
46fc3d4c 2597 sv_setpv(tmpsv, ".");
62b28dd9 2598 else
46fc3d4c 2599 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 2600 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2601 return FALSE;
2602 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2603 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2604}
fe14fcc3
LW		 2605#endif /* !HAS_RENAME */
2606
55497cff 2607UV
864dbfa3 2608Perl_scan_bin(pTHX_ char *start, I32 len, I32 *retlen)
4f19785b
WSI		 2609{
2610 register char *s = start;
2611 register UV retval = 0;
2612 bool overflowed = FALSE;
2613 while (len && *s >= '0' && *s <= '1') {
2614 register UV n = retval << 1;
2615 if (!overflowed && (n >> 1) != retval) {
2616 warn("Integer overflow in binary number");
2617 overflowed = TRUE;
2618 }
2619 retval = n | (*s++ - '0');
2620 len--;
2621 }
6529e8bd 2622 if (len && (*s >= '2' && *s <= '9')) {
4f19785b
WSI		 2623 dTHR;
2624 if (ckWARN(WARN_UNSAFE))
399388f4 2625 warner(WARN_UNSAFE, "Illegal binary digit '%c' ignored", *s);
4f19785b
WSI		 2626 }
2627 *retlen = s - start;
2628 return retval;
2629}
2630UV
864dbfa3 2631Perl_scan_oct(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2632{
2633 register char *s = start;
55497cff 2634 register UV retval = 0;
2635 bool overflowed = FALSE;
fe14fcc3 2636
748a9306 2637 while (len && *s >= '0' && *s <= '7') {
55497cff 2638 register UV n = retval << 3;
2639 if (!overflowed && (n >> 3) != retval) {
2640 warn("Integer overflow in octal number");
2641 overflowed = TRUE;
2642 }
2643 retval = n | (*s++ - '0');
748a9306 2644 len--;
fe14fcc3 2645 }
d008e5eb
GS		 2646 if (len && (*s == '8' || *s == '9')) {
2647 dTHR;
2648 if (ckWARN(WARN_OCTAL))
399388f4 2649 warner(WARN_OCTAL, "Illegal octal digit '%c' ignored", *s);
d008e5eb 2650 }
fe14fcc3
LW		 2651 *retlen = s - start;
2652 return retval;
2653}
2654
71be2cbc 2655UV
864dbfa3 2656Perl_scan_hex(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2657{
2658 register char *s = start;
55497cff 2659 register UV retval = 0;
2660 bool overflowed = FALSE;
6ff81951 2661 char *tmp = s;
a0ed51b3 2662 register UV n;
fe14fcc3 2663
a0ed51b3
LW		 2664 while (len-- && *s) {
2665 tmp = strchr((char *) PL_hexdigit, *s++);
2666 if (!tmp) {
e3fdf988 2667 if (*(s-1) == '_' || (*(s-1) == 'x' && retval == 0))
a0ed51b3
LW		 2668 continue;
2669 else {
d008e5eb 2670 dTHR;
a0ed51b3 2671 --s;
599cee73 2672 if (ckWARN(WARN_UNSAFE))
399388f4 2673 warner(WARN_UNSAFE,"Illegal hex digit '%c' ignored", *s);
a0ed51b3
LW		 2674 break;
2675 }
2676 }
2677 n = retval << 4;
55497cff 2678 if (!overflowed && (n >> 4) != retval) {
2679 warn("Integer overflow in hex number");
2680 overflowed = TRUE;
2681 }
3280af22 2682 retval = n | ((tmp - PL_hexdigit) & 15);
6ff81951 2683 }
fe14fcc3
LW		 2684 *retlen = s - start;
2685 return retval;
2686}
760ac839 2687
491527d0 2688char*
864dbfa3 2689Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0
GS		 2690{
2691 dTHR;
2692 char *xfound = Nullch;
2693 char *xfailed = Nullch;
0f31cffe 2694 char tmpbuf[MAXPATHLEN];
491527d0
GS		 2695 register char *s;
2696 I32 len;
2697 int retval;
2698#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2699# define SEARCH_EXTS ".bat", ".cmd", NULL
2700# define MAX_EXT_LEN 4
2701#endif
2702#ifdef OS2
2703# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2704# define MAX_EXT_LEN 4
2705#endif
2706#ifdef VMS
2707# define SEARCH_EXTS ".pl", ".com", NULL
2708# define MAX_EXT_LEN 4
2709#endif
2710 /* additional extensions to try in each dir if scriptname not found */
2711#ifdef SEARCH_EXTS
2712 char *exts[] = { SEARCH_EXTS };
2713 char **ext = search_ext ? search_ext : exts;
2714 int extidx = 0, i = 0;
2715 char *curext = Nullch;
2716#else
2717# define MAX_EXT_LEN 0
2718#endif
2719
2720 /*
2721 * If dosearch is true and if scriptname does not contain path
2722 * delimiters, search the PATH for scriptname.
2723 *
2724 * If SEARCH_EXTS is also defined, will look for each
2725 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2726 * while searching the PATH.
2727 *
2728 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2729 * proceeds as follows:
2730 * If DOSISH or VMSISH:
2731 * + look for ./scriptname{,.foo,.bar}
2732 * + search the PATH for scriptname{,.foo,.bar}
2733 *
2734 * If !DOSISH:
2735 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2736 * this will not look in '.' if it's not in the PATH)
2737 */
84486fc6 2738 tmpbuf[0] = '\0';
491527d0
GS		 2739
2740#ifdef VMS
2741# ifdef ALWAYS_DEFTYPES
2742 len = strlen(scriptname);
2743 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2744 int hasdir, idx = 0, deftypes = 1;
2745 bool seen_dot = 1;
2746
2747 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2748# else
2749 if (dosearch) {
2750 int hasdir, idx = 0, deftypes = 1;
2751 bool seen_dot = 1;
2752
2753 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2754# endif
2755 /* The first time through, just add SEARCH_EXTS to whatever we
2756 * already have, so we can check for default file types. */
2757 while (deftypes ||
84486fc6 2758 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2759 {
2760 if (deftypes) {
2761 deftypes = 0;
84486fc6 2762 *tmpbuf = '\0';
491527d0 2763 }
84486fc6
GS		 2764 if ((strlen(tmpbuf) + strlen(scriptname)
2765 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2766 continue; /* don't search dir with too-long name */
84486fc6 2767 strcat(tmpbuf, scriptname);
491527d0
GS		 2768#else /* !VMS */
2769
2770#ifdef DOSISH
2771 if (strEQ(scriptname, "-"))
2772 dosearch = 0;
2773 if (dosearch) { /* Look in '.' first. */
2774 char *cur = scriptname;
2775#ifdef SEARCH_EXTS
2776 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2777 while (ext[i])
2778 if (strEQ(ext[i++],curext)) {
2779 extidx = -1; /* already has an ext */
2780 break;
2781 }
2782 do {
2783#endif
2784 DEBUG_p(PerlIO_printf(Perl_debug_log,
2785 "Looking for %s\n",cur));
017f25f1
IZ		 2786 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2787 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2788 dosearch = 0;
2789 scriptname = cur;
2790#ifdef SEARCH_EXTS
2791 break;
2792#endif
2793 }
2794#ifdef SEARCH_EXTS
2795 if (cur == scriptname) {
2796 len = strlen(scriptname);
84486fc6 2797 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2798 break;
84486fc6 2799 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2800 }
2801 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2802 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2803#endif
2804 }
2805#endif
2806
2807 if (dosearch && !strchr(scriptname, '/')
2808#ifdef DOSISH
2809 && !strchr(scriptname, '\\')
2810#endif
2811 && (s = PerlEnv_getenv("PATH"))) {
2812 bool seen_dot = 0;
2813
3280af22
NIS		 2814 PL_bufend = s + strlen(s);
2815 while (s < PL_bufend) {
491527d0
GS		 2816#if defined(atarist) || defined(DOSISH)
2817 for (len = 0; *s
2818# ifdef atarist
2819 && *s != ','
2820# endif
2821 && *s != ';'; len++, s++) {
84486fc6
GS		 2822 if (len < sizeof tmpbuf)
2823 tmpbuf[len] = *s;
491527d0 2824 }
84486fc6
GS		 2825 if (len < sizeof tmpbuf)
2826 tmpbuf[len] = '\0';
491527d0 2827#else /* ! (atarist || DOSISH) */
3280af22 2828 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2829 ':',
2830 &len);
2831#endif /* ! (atarist || DOSISH) */
3280af22 2832 if (s < PL_bufend)
491527d0 2833 s++;
84486fc6 2834 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS		 2835 continue; /* don't search dir with too-long name */
2836 if (len
61ae2fbf 2837#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2838 && tmpbuf[len - 1] != '/'
2839 && tmpbuf[len - 1] != '\\'
491527d0
GS		 2840#endif
2841 )
84486fc6
GS		 2842 tmpbuf[len++] = '/';
2843 if (len == 2 && tmpbuf[0] == '.')
491527d0 2844 seen_dot = 1;
84486fc6 2845 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2846#endif /* !VMS */
2847
2848#ifdef SEARCH_EXTS
84486fc6 2849 len = strlen(tmpbuf);
491527d0
GS		 2850 if (extidx > 0) /* reset after previous loop */
2851 extidx = 0;
2852 do {
2853#endif
84486fc6 2854 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2855 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2856 if (S_ISDIR(PL_statbuf.st_mode)) {
2857 retval = -1;
2858 }
491527d0
GS		 2859#ifdef SEARCH_EXTS
2860 } while ( retval < 0 /* not there */
2861 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2862 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2863 );
2864#endif
2865 if (retval < 0)
2866 continue;
3280af22
NIS		 2867 if (S_ISREG(PL_statbuf.st_mode)
2868 && cando(S_IRUSR,TRUE,&PL_statbuf)
491527d0 2869#ifndef DOSISH
3280af22 2870 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2871#endif
2872 )
2873 {
84486fc6 2874 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2875 break;
2876 }
2877 if (!xfailed)
84486fc6 2878 xfailed = savepv(tmpbuf);
491527d0
GS		 2879 }
2880#ifndef DOSISH
017f25f1
IZ		 2881 if (!xfound && !seen_dot && !xfailed &&
2882 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
2883 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2884#endif
2885 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2886 if (!xfound) {
2887 if (flags & 1) { /* do or die? */
2888 croak("Can't %s %s%s%s",
2889 (xfailed ? "execute" : "find"),
2890 (xfailed ? xfailed : scriptname),
2891 (xfailed ? "" : " on PATH"),
2892 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2893 }
2894 scriptname = Nullch;
2895 }
491527d0
GS		 2896 if (xfailed)
2897 Safefree(xfailed);
2898 scriptname = xfound;
2899 }
9ccb31f9 2900 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 2901}
2902
2903
11343788 2904#ifdef USE_THREADS
12ca11f6
MB		 2905#ifdef FAKE_THREADS
2906/* Very simplistic scheduler for now */
2907void
2908schedule(void)
2909{
c7848ba1 2910 thr = thr->i.next_run;
12ca11f6
MB		 2911}
2912
2913void
864dbfa3 2914Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB		 2915{
2916 *cp = 0;
2917}
2918
2919void
864dbfa3 2920Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 2921{
51dd5992 2922 perl_os_thread t;
12ca11f6
MB		 2923 perl_cond cond = *cp;
2924
2925 if (!cond)
2926 return;
2927 t = cond->thread;
2928 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 2929 t->i.next_run = thr->i.next_run;
2930 thr->i.next_run->i.prev_run = t;
2931 t->i.prev_run = thr;
2932 thr->i.next_run = t;
2933 thr->i.wait_queue = 0;
12ca11f6
MB		 2934 /* Remove from the wait queue */
2935 *cp = cond->next;
2936 Safefree(cond);
2937}
2938
2939void
864dbfa3 2940Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 2941{
51dd5992 2942 perl_os_thread t;
12ca11f6
MB		 2943 perl_cond cond, cond_next;
2944
2945 for (cond = *cp; cond; cond = cond_next) {
2946 t = cond->thread;
2947 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 2948 t->i.next_run = thr->i.next_run;
2949 thr->i.next_run->i.prev_run = t;
2950 t->i.prev_run = thr;
2951 thr->i.next_run = t;
2952 thr->i.wait_queue = 0;
12ca11f6
MB		 2953 /* Remove from the wait queue */
2954 cond_next = cond->next;
2955 Safefree(cond);
2956 }
2957 *cp = 0;
2958}
2959
2960void
864dbfa3 2961Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB		 2962{
2963 perl_cond cond;
2964
c7848ba1 2965 if (thr->i.next_run == thr)
12ca11f6
MB		 2966 croak("panic: perl_cond_wait called by last runnable thread");
2967
0f15f207 2968 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB		 2969 cond->thread = thr;
2970 cond->next = *cp;
2971 *cp = cond;
c7848ba1 2972 thr->i.wait_queue = cond;
12ca11f6 2973 /* Remove ourselves from runnable queue */
c7848ba1
MB		 2974 thr->i.next_run->i.prev_run = thr->i.prev_run;
2975 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB		 2976}
2977#endif /* FAKE_THREADS */
2978
0d85d877 2979#ifdef PTHREAD_GETSPECIFIC_INT
52e1cb5e 2980struct perl_thread *
864dbfa3 2981Perl_getTHR(pTHX)
11343788
MB		 2982{
2983 pthread_addr_t t;
2984
6b88bc9c 2985 if (pthread_getspecific(PL_thr_key, &t))
11343788 2986 croak("panic: pthread_getspecific");
52e1cb5e 2987 return (struct perl_thread *) t;
11343788 2988}
0d85d877 2989#endif
f93b4edd
MB		 2990
2991MAGIC *
864dbfa3 2992Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB		 2993{
2994 MAGIC *mg;
2995
2996 SvUPGRADE(sv, SVt_PVMG);
2997 mg = mg_find(sv, 'm');
2998 if (!mg) {
2999 condpair_t *cp;
3000
3001 New(53, cp, 1, condpair_t);
3002 MUTEX_INIT(&cp->mutex);
3003 COND_INIT(&cp->owner_cond);
3004 COND_INIT(&cp->cond);
3005 cp->owner = 0;
28a8573f 3006 MUTEX_LOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3007 mg = mg_find(sv, 'm');
3008 if (mg) {
3009 /* someone else beat us to initialising it */
28a8573f 3010 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3011 MUTEX_DESTROY(&cp->mutex);
3012 COND_DESTROY(&cp->owner_cond);
3013 COND_DESTROY(&cp->cond);
3014 Safefree(cp);
3015 }
3016 else {
3017 sv_magic(sv, Nullsv, 'm', 0, 0);
3018 mg = SvMAGIC(sv);
3019 mg->mg_ptr = (char *)cp;
565764a8 3020 mg->mg_len = sizeof(cp);
28a8573f 3021 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
8b73bbec 3022 DEBUG_S(WITH_THR(PerlIO_printf(PerlIO_stderr(),
c7848ba1 3023 "%p: condpair_magic %p\n", thr, sv));)
f93b4edd
MB		 3024 }
3025 }
3026 return mg;
3027}
a863c7d1
MB		 3028
3029/*
199100c8
MB		 3030 * Make a new perl thread structure using t as a prototype. Some of the
3031 * fields for the new thread are copied from the prototype thread, t,
3032 * so t should not be running in perl at the time this function is
3033 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
3034 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 3035 */
52e1cb5e 3036struct perl_thread *
864dbfa3 3037Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 3038{
52e1cb5e 3039 struct perl_thread *thr;
a863c7d1 3040 SV *sv;
199100c8
MB		 3041 SV **svp;
3042 I32 i;
3043
79cb57f6 3044 sv = newSVpvn("", 0);
52e1cb5e
JH		 3045 SvGROW(sv, sizeof(struct perl_thread) + 1);
3046 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 3047 thr = (Thread) SvPVX(sv);
949ced2d 3048#ifdef DEBUGGING
52e1cb5e 3049 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS		 3050 PL_markstack = 0;
3051 PL_scopestack = 0;
3052 PL_savestack = 0;
3053 PL_retstack = 0;
3054 PL_dirty = 0;
3055 PL_localizing = 0;
949ced2d
GS		 3056 Zero(&PL_hv_fetch_ent_mh, 1, HE);
3057#else
3058 Zero(thr, 1, struct perl_thread);
3059#endif
199100c8 3060
312caa8e
CS		 3061 PL_protect = FUNC_NAME_TO_PTR(default_protect);
3062
199100c8 3063 thr->oursv = sv;
d55594ae 3064 init_stacks(ARGS);
a863c7d1 3065
533c011a 3066 PL_curcop = &PL_compiling;
199100c8 3067 thr->cvcache = newHV();
54b9620d 3068 thr->threadsv = newAV();
a863c7d1 3069 thr->specific = newAV();
79cb57f6 3070 thr->errsv = newSVpvn("", 0);
38a03e6e 3071 thr->errhv = newHV();
a863c7d1
MB		 3072 thr->flags = THRf_R_JOINABLE;
3073 MUTEX_INIT(&thr->mutex);
199100c8 3074
d55594ae
GS		 3075 /* top_env needs to be non-zero. It points to an area
3076 in which longjmp() stuff is stored, as C callstack
3077 info there at least is thread specific this has to
3078 be per-thread. Otherwise a 'die' in a thread gives
3079 that thread the C stack of last thread to do an eval {}!
3080 See comments in scope.h
3081 Initialize top entry (as in perl.c for main thread)
3082 */
533c011a
NIS		 3083 PL_start_env.je_prev = NULL;
3084 PL_start_env.je_ret = -1;
3085 PL_start_env.je_mustcatch = TRUE;
3086 PL_top_env = &PL_start_env;
3087
faef0170 3088 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR) */
533c011a
NIS		 3089 PL_restartop = 0;
3090
b099ddc0
GS		 3091 PL_statname = NEWSV(66,0);
3092 PL_maxscream = -1;
3093 PL_regcompp = FUNC_NAME_TO_PTR(pregcomp);
3094 PL_regexecp = FUNC_NAME_TO_PTR(regexec_flags);
3095 PL_regindent = 0;
3096 PL_reginterp_cnt = 0;
3097 PL_lastscream = Nullsv;
3098 PL_screamfirst = 0;
3099 PL_screamnext = 0;
3100 PL_reg_start_tmp = 0;
3101 PL_reg_start_tmpl = 0;
3102
3103 /* parent thread's data needs to be locked while we make copy */
3104 MUTEX_LOCK(&t->mutex);
3105
312caa8e
CS		 3106 PL_protect = t->Tprotect;
3107
b099ddc0
GS		 3108 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
3109 PL_defstash = t->Tdefstash; /* XXX maybe these should */
3110 PL_curstash = t->Tcurstash; /* always be set to main? */
3111
6b88bc9c 3112 PL_tainted = t->Ttainted;
84fee439
NIS		 3113 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
3114 PL_nrs = newSVsv(t->Tnrs);
3115 PL_rs = SvREFCNT_inc(PL_nrs);
3116 PL_last_in_gv = Nullgv;
3117 PL_ofslen = t->Tofslen;
3118 PL_ofs = savepvn(t->Tofs, PL_ofslen);
3119 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
3120 PL_chopset = t->Tchopset;
3121 PL_formtarget = newSVsv(t->Tformtarget);
3122 PL_bodytarget = newSVsv(t->Tbodytarget);
3123 PL_toptarget = newSVsv(t->Ttoptarget);
533c011a 3124
54b9620d
MB		 3125 /* Initialise all per-thread SVs that the template thread used */
3126 svp = AvARRAY(t->threadsv);
93965878 3127 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 3128 if (*svp && *svp != &PL_sv_undef) {
199100c8 3129 SV *sv = newSVsv(*svp);
54b9620d 3130 av_store(thr->threadsv, i, sv);
533c011a 3131 sv_magic(sv, 0, 0, &PL_threadsv_names[i], 1);
8b73bbec 3132 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 3133 "new_struct_thread: copied threadsv %d %p->%p\n",i, t, thr));
199100c8
MB		 3134 }
3135 }
940cb80d 3136 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 3137
533c011a
NIS		 3138 MUTEX_LOCK(&PL_threads_mutex);
3139 PL_nthreads++;
3140 thr->tid = ++PL_threadnum;
199100c8
MB		 3141 thr->next = t->next;
3142 thr->prev = t;
3143 t->next = thr;
3144 thr->next->prev = thr;
533c011a 3145 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 3146
b099ddc0
GS		 3147 /* done copying parent's state */
3148 MUTEX_UNLOCK(&t->mutex);
3149
a863c7d1
MB		 3150#ifdef HAVE_THREAD_INTERN
3151 init_thread_intern(thr);
a863c7d1 3152#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB		 3153 return thr;
3154}
11343788 3155#endif /* USE_THREADS */
760ac839
LW		 3156
3157#ifdef HUGE_VAL
3158/*
3159 * This hack is to force load of "huge" support from libm.a
3160 * So it is in perl for (say) POSIX to use.
3161 * Needed for SunOS with Sun's 'acc' for example.
3162 */
3163double
8ac85365 3164Perl_huge(void)
760ac839
LW		 3165{
3166 return HUGE_VAL;
3167}
3168#endif
4e35701f 3169
22239a37
NIS		 3170#ifdef PERL_GLOBAL_STRUCT
3171struct perl_vars *
864dbfa3 3172Perl_GetVars(pTHX)
22239a37 3173{
533c011a 3174 return &PL_Vars;
22239a37 3175}
31fb1209
NIS		 3176#endif
3177
3178char **
864dbfa3 3179Perl_get_op_names(pTHX)
31fb1209 3180{
22c35a8c 3181 return PL_op_name;
31fb1209
NIS		 3182}
3183
3184char **
864dbfa3 3185Perl_get_op_descs(pTHX)
31fb1209 3186{
22c35a8c 3187 return PL_op_desc;
31fb1209 3188}
9e6b2b00
GS		 3189
3190char *
864dbfa3 3191Perl_get_no_modify(pTHX)
9e6b2b00 3192{
22c35a8c 3193 return (char*)PL_no_modify;
9e6b2b00
GS		 3194}
3195
3196U32 *
864dbfa3 3197Perl_get_opargs(pTHX)
9e6b2b00 3198{
22c35a8c 3199 return PL_opargs;
9e6b2b00 3200}
51aa15f3 3201
a6c40364
GS		 3202#ifndef HAS_GETENV_LEN
3203char *
864dbfa3 3204Perl_getenv_len(pTHX_ char *env_elem, unsigned long *len)
a6c40364
GS		 3205{
3206 char *env_trans = PerlEnv_getenv(env_elem);
3207 if (env_trans)
3208 *len = strlen(env_trans);
3209 return env_trans;
f675dbe5
CB		 3210}
3211#endif
3212
dc9e4912
GS		 3213
3214MGVTBL*
864dbfa3 3215Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS		 3216{
3217 MGVTBL* result = Null(MGVTBL*);
3218
3219 switch(vtbl_id) {
3220 case want_vtbl_sv:
3221 result = &PL_vtbl_sv;
3222 break;
3223 case want_vtbl_env:
3224 result = &PL_vtbl_env;
3225 break;
3226 case want_vtbl_envelem:
3227 result = &PL_vtbl_envelem;
3228 break;
3229 case want_vtbl_sig:
3230 result = &PL_vtbl_sig;
3231 break;
3232 case want_vtbl_sigelem:
3233 result = &PL_vtbl_sigelem;
3234 break;
3235 case want_vtbl_pack:
3236 result = &PL_vtbl_pack;
3237 break;
3238 case want_vtbl_packelem:
3239 result = &PL_vtbl_packelem;
3240 break;
3241 case want_vtbl_dbline:
3242 result = &PL_vtbl_dbline;
3243 break;
3244 case want_vtbl_isa:
3245 result = &PL_vtbl_isa;
3246 break;
3247 case want_vtbl_isaelem:
3248 result = &PL_vtbl_isaelem;
3249 break;
3250 case want_vtbl_arylen:
3251 result = &PL_vtbl_arylen;
3252 break;
3253 case want_vtbl_glob:
3254 result = &PL_vtbl_glob;
3255 break;
3256 case want_vtbl_mglob:
3257 result = &PL_vtbl_mglob;
3258 break;
3259 case want_vtbl_nkeys:
3260 result = &PL_vtbl_nkeys;
3261 break;
3262 case want_vtbl_taint:
3263 result = &PL_vtbl_taint;
3264 break;
3265 case want_vtbl_substr:
3266 result = &PL_vtbl_substr;
3267 break;
3268 case want_vtbl_vec:
3269 result = &PL_vtbl_vec;
3270 break;
3271 case want_vtbl_pos:
3272 result = &PL_vtbl_pos;
3273 break;
3274 case want_vtbl_bm:
3275 result = &PL_vtbl_bm;
3276 break;
3277 case want_vtbl_fm:
3278 result = &PL_vtbl_fm;
3279 break;
3280 case want_vtbl_uvar:
3281 result = &PL_vtbl_uvar;
3282 break;
3283#ifdef USE_THREADS
3284 case want_vtbl_mutex:
3285 result = &PL_vtbl_mutex;
3286 break;
3287#endif
3288 case want_vtbl_defelem:
3289 result = &PL_vtbl_defelem;
3290 break;
3291 case want_vtbl_regexp:
3292 result = &PL_vtbl_regexp;
3293 break;
3294 case want_vtbl_regdata:
3295 result = &PL_vtbl_regdata;
3296 break;
3297 case want_vtbl_regdatum:
3298 result = &PL_vtbl_regdatum;
3299 break;
3c90161d 3300#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3301 case want_vtbl_collxfrm:
3302 result = &PL_vtbl_collxfrm;
3303 break;
3c90161d 3304#endif
dc9e4912
GS		 3305 case want_vtbl_amagic:
3306 result = &PL_vtbl_amagic;
3307 break;
3308 case want_vtbl_amagicelem:
3309 result = &PL_vtbl_amagicelem;
3310 break;
810b8aa5
GS		 3311 case want_vtbl_backref:
3312 result = &PL_vtbl_backref;
3313 break;
dc9e4912
GS		 3314 }
3315 return result;
3316}
3317
767df6a1 3318I32
864dbfa3 3319Perl_my_fflush_all(pTHX)
767df6a1
JH		 3320{
3321#ifdef FFLUSH_NULL
ce720889 3322 return PerlIO_flush(NULL);
767df6a1
JH		 3323#else
3324 long open_max = -1;
ed39a0f2 3325# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
d2201af2
AD		 3326# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3327 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3328# else
767df6a1
JH		 3329# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3330 open_max = sysconf(_SC_OPEN_MAX);
3331# else
3332# ifdef FOPEN_MAX
d2201af2 3333 open_max = FOPEN_MAX;
767df6a1
JH		 3334# else
3335# ifdef OPEN_MAX
d2201af2 3336 open_max = OPEN_MAX;
767df6a1
JH		 3337# else
3338# ifdef _NFILE
d2201af2 3339 open_max = _NFILE;
767df6a1
JH		 3340# endif
3341# endif
3342# endif
3343# endif
d2201af2 3344# endif
767df6a1
JH		 3345 if (open_max > 0) {
3346 long i;
3347 for (i = 0; i < open_max; i++)
d2201af2
AD		 3348 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3349 STDIO_STREAM_ARRAY[i]._file < open_max &&
3350 STDIO_STREAM_ARRAY[i]._flag)
3351 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3352 return 0;
3353 }
3354# endif
3355 SETERRNO(EBADF,RMS$_IFI);
3356 return EOF;
3357#endif
3358}
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