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[ PATCH perl5.005_57 ] new perlcc + regression tests
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
4eb8286e 3 * Copyright (c) 1991-1999, Larry Wall
a687059c 4 *
d48672a2
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8d063cd8 7 *
8d063cd8 8 */
a0d0e21e
LW		 9
10/*
11 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
12 * not content." --Gandalf
13 */
8d063cd8 14
8d063cd8 15#include "EXTERN.h"
864dbfa3 16#define PERL_IN_UTIL_C
8d063cd8 17#include "perl.h"
62b28dd9 18
e1dfb34b 19#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
a687059c 20#include <signal.h>
62b28dd9 21#endif
a687059c 22
36477c24 23#ifndef SIG_ERR
24# define SIG_ERR ((Sighandler_t) -1)
25#endif
26
bd4080b3 27/* XXX If this causes problems, set i_unistd=undef in the hint file. */
85e6fe83 28#ifdef I_UNISTD
8990e307
LW		 29# include <unistd.h>
30#endif
31
a687059c
LW		 32#ifdef I_VFORK
33# include <vfork.h>
34#endif
35
94b6baf5
AD		 36/* Put this after #includes because fork and vfork prototypes may
37 conflict.
38*/
39#ifndef HAS_VFORK
40# define vfork fork
41#endif
42
fe14fcc3
LW		 43#ifdef I_FCNTL
44# include <fcntl.h>
45#endif
46#ifdef I_SYS_FILE
47# include <sys/file.h>
48#endif
49
ff68c719 50#ifdef I_SYS_WAIT
51# include <sys/wait.h>
52#endif
53
097ee67d
JH		 54#ifdef I_LOCALE
55# include <locale.h>
56#endif
57
8d063cd8 58#define FLUSH
8d063cd8 59
a0d0e21e 60#ifdef LEAKTEST
a0d0e21e 61
8c52afec
IZ		 62long xcount[MAXXCOUNT];
63long lastxcount[MAXXCOUNT];
64long xycount[MAXXCOUNT][MAXYCOUNT];
65long lastxycount[MAXXCOUNT][MAXYCOUNT];
66
a0d0e21e 67#endif
a863c7d1 68
f2517201 69/* paranoid version of system's malloc() */
8d063cd8 70
a687059c
LW		 71/* NOTE: Do not call the next three routines directly. Use the macros
72 * in handy.h, so that we can easily redefine everything to do tracking of
73 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 74 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 75 */
76
bd4080b3 77Malloc_t
4f63d024 78Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 79{
bd4080b3 80 Malloc_t ptr;
55497cff 81#ifdef HAS_64K_LIMIT
62b28dd9 82 if (size > 0xffff) {
760ac839 83 PerlIO_printf(PerlIO_stderr(), "Allocation too large: %lx\n", size) FLUSH;
4f63d024 84 WITH_THX(my_exit(1));
62b28dd9 85 }
55497cff 86#endif /* HAS_64K_LIMIT */
34de22dd
LW		 87#ifdef DEBUGGING
88 if ((long)size < 0)
4f63d024 89 Perl_croak_nocontext("panic: malloc");
34de22dd 90#endif
6ad3d225 91 ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
79072805 92#if !(defined(I286) || defined(atarist))
3280af22 93 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
79072805 94#else
6b88bc9c 95 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) malloc %ld bytes\n",ptr,PL_an++,(long)size));
8d063cd8
LW		 96#endif
97 if (ptr != Nullch)
98 return ptr;
3280af22 99 else if (PL_nomemok)
7c0587c8 100 return Nullch;
8d063cd8 101 else {
22c35a8c 102 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
4f63d024 103 WITH_THX(my_exit(1));
4e35701f 104 return Nullch;
8d063cd8
LW		 105 }
106 /*NOTREACHED*/
107}
108
f2517201 109/* paranoid version of system's realloc() */
8d063cd8 110
bd4080b3 111Malloc_t
4f63d024 112Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 113{
bd4080b3 114 Malloc_t ptr;
ecfc5424 115#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE)
6ad3d225 116 Malloc_t PerlMem_realloc();
ecfc5424 117#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 118
55497cff 119#ifdef HAS_64K_LIMIT
5f05dabc 120 if (size > 0xffff) {
121 PerlIO_printf(PerlIO_stderr(),
122 "Reallocation too large: %lx\n", size) FLUSH;
4f63d024 123 WITH_THX(my_exit(1));
5f05dabc 124 }
55497cff 125#endif /* HAS_64K_LIMIT */
7614df0c 126 if (!size) {
f2517201 127 safesysfree(where);
7614df0c
JD		 128 return NULL;
129 }
130
378cc40b 131 if (!where)
f2517201 132 return safesysmalloc(size);
34de22dd
LW		 133#ifdef DEBUGGING
134 if ((long)size < 0)
4f63d024 135 Perl_croak_nocontext("panic: realloc");
34de22dd 136#endif
7614df0c 137 ptr = PerlMem_realloc(where,size);
79072805
LW		 138
139#if !(defined(I286) || defined(atarist))
140 DEBUG_m( {
3280af22
NIS		 141 PerlIO_printf(Perl_debug_log, "0x%x: (%05d) rfree\n",where,PL_an++);
142 PerlIO_printf(Perl_debug_log, "0x%x: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
79072805
LW		 143 } )
144#else
145 DEBUG_m( {
6b88bc9c
GS		 146 PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) rfree\n",where,PL_an++);
147 PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) realloc %ld bytes\n",ptr,PL_an++,(long)size);
79072805 148 } )
8d063cd8 149#endif
79072805 150
8d063cd8
LW		 151 if (ptr != Nullch)
152 return ptr;
3280af22 153 else if (PL_nomemok)
7c0587c8 154 return Nullch;
8d063cd8 155 else {
22c35a8c 156 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
4f63d024 157 WITH_THX(my_exit(1));
4e35701f 158 return Nullch;
8d063cd8
LW		 159 }
160 /*NOTREACHED*/
161}
162
f2517201 163/* safe version of system's free() */
8d063cd8 164
54310121 165Free_t
4f63d024 166Perl_safesysfree(Malloc_t where)
8d063cd8 167{
79072805 168#if !(defined(I286) || defined(atarist))
3280af22 169 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%x: (%05d) free\n",(char *) where,PL_an++));
79072805 170#else
6b88bc9c 171 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) free\n",(char *) where,PL_an++));
8d063cd8 172#endif
378cc40b 173 if (where) {
de3bb511 174 /*SUPPRESS 701*/
6ad3d225 175 PerlMem_free(where);
378cc40b 176 }
8d063cd8
LW		 177}
178
f2517201 179/* safe version of system's calloc() */
1050c9ca 180
bd4080b3 181Malloc_t
4f63d024 182Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 183{
bd4080b3 184 Malloc_t ptr;
1050c9ca 185
55497cff 186#ifdef HAS_64K_LIMIT
5f05dabc 187 if (size * count > 0xffff) {
188 PerlIO_printf(PerlIO_stderr(),
189 "Allocation too large: %lx\n", size * count) FLUSH;
4f63d024 190 WITH_THX(my_exit(1));
5f05dabc 191 }
55497cff 192#endif /* HAS_64K_LIMIT */
1050c9ca 193#ifdef DEBUGGING
194 if ((long)size < 0 || (long)count < 0)
4f63d024 195 Perl_croak_nocontext("panic: calloc");
1050c9ca 196#endif
0b7c1c42 197 size *= count;
6ad3d225 198 ptr = PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
1050c9ca 199#if !(defined(I286) || defined(atarist))
3280af22 200 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%x: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
1050c9ca 201#else
6b88bc9c 202 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%lx: (%05d) calloc %ld x %ld bytes\n",ptr,PL_an++,(long)count,(long)size));
1050c9ca 203#endif
1050c9ca 204 if (ptr != Nullch) {
205 memset((void*)ptr, 0, size);
206 return ptr;
207 }
3280af22 208 else if (PL_nomemok)
1050c9ca 209 return Nullch;
210 else {
22c35a8c 211 PerlIO_puts(PerlIO_stderr(),PL_no_mem) FLUSH;
4f63d024 212 WITH_THX(my_exit(1));
4e35701f 213 return Nullch;
1050c9ca 214 }
215 /*NOTREACHED*/
216}
217
a687059c
LW		 218#ifdef LEAKTEST
219
8c52afec
IZ		 220struct mem_test_strut {
221 union {
222 long type;
223 char c[2];
224 } u;
225 long size;
226};
227
228# define ALIGN sizeof(struct mem_test_strut)
229
230# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
231# define typeof_chunk(ch) \
232 (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
233# define set_typeof_chunk(ch,t) \
234 (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
235#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
236 ? MAXYCOUNT - 1 \
237 : ( (size) > 40 \
238 ? ((size) - 1)/8 + 5 \
239 : ((size) - 1)/4))
8d063cd8 240
bd4080b3 241Malloc_t
4f63d024 242Perl_safexmalloc(I32 x, MEM_SIZE size)
8d063cd8 243{
8c52afec 244 register char* where = (char*)safemalloc(size + ALIGN);
8d063cd8 245
8c52afec
IZ		 246 xcount[x] += size;
247 xycount[x][SIZE_TO_Y(size)]++;
248 set_typeof_chunk(where, x);
249 sizeof_chunk(where) = size;
250 return (Malloc_t)(where + ALIGN);
8d063cd8 251}
8d063cd8 252
bd4080b3 253Malloc_t
4f63d024 254Perl_safexrealloc(Malloc_t wh, MEM_SIZE size)
a687059c 255{
8c52afec
IZ		 256 char *where = (char*)wh;
257
258 if (!wh)
259 return safexmalloc(0,size);
260
261 {
262 MEM_SIZE old = sizeof_chunk(where - ALIGN);
263 int t = typeof_chunk(where - ALIGN);
264 register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
265
266 xycount[t][SIZE_TO_Y(old)]--;
267 xycount[t][SIZE_TO_Y(size)]++;
268 xcount[t] += size - old;
269 sizeof_chunk(new) = size;
270 return (Malloc_t)(new + ALIGN);
271 }
a687059c
LW		 272}
273
274void
4f63d024 275Perl_safexfree(Malloc_t wh)
a687059c 276{
79072805 277 I32 x;
8c52afec
IZ		 278 char *where = (char*)wh;
279 MEM_SIZE size;
280
a687059c
LW		 281 if (!where)
282 return;
283 where -= ALIGN;
8c52afec 284 size = sizeof_chunk(where);
a687059c 285 x = where[0] + 100 * where[1];
8c52afec
IZ		 286 xcount[x] -= size;
287 xycount[x][SIZE_TO_Y(size)]--;
a687059c
LW		 288 safefree(where);
289}
290
bd4080b3 291Malloc_t
4f63d024 292Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
1050c9ca 293{
8c52afec
IZ		 294 register char * where = (char*)safexmalloc(x, size * count + ALIGN);
295 xcount[x] += size;
296 xycount[x][SIZE_TO_Y(size)]++;
297 memset((void*)(where + ALIGN), 0, size * count);
298 set_typeof_chunk(where, x);
299 sizeof_chunk(where) = size;
300 return (Malloc_t)(where + ALIGN);
1050c9ca 301}
302
864dbfa3 303STATIC void
cea2e8a9 304S_xstat(pTHX_ int flag)
8d063cd8 305{
8c52afec
IZ		 306 register I32 i, j, total = 0;
307 I32 subtot[MAXYCOUNT];
8d063cd8 308
8c52afec
IZ		 309 for (j = 0; j < MAXYCOUNT; j++) {
310 subtot[j] = 0;
311 }
312
313 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 314 for (i = 0; i < MAXXCOUNT; i++) {
8c52afec
IZ		 315 total += xcount[i];
316 for (j = 0; j < MAXYCOUNT; j++) {
317 subtot[j] += xycount[i][j];
318 }
319 if (flag == 0
320 ? xcount[i] /* Have something */
321 : (flag == 2
322 ? xcount[i] != lastxcount[i] /* Changed */
323 : xcount[i] > lastxcount[i])) { /* Growed */
324 PerlIO_printf(PerlIO_stderr(),"%2d %02d %7ld ", i / 100, i % 100,
325 flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
a687059c 326 lastxcount[i] = xcount[i];
8c52afec
IZ		 327 for (j = 0; j < MAXYCOUNT; j++) {
328 if ( flag == 0
329 ? xycount[i][j] /* Have something */
330 : (flag == 2
331 ? xycount[i][j] != lastxycount[i][j] /* Changed */
332 : xycount[i][j] > lastxycount[i][j])) { /* Growed */
333 PerlIO_printf(PerlIO_stderr(),"%3ld ",
334 flag == 2
335 ? xycount[i][j] - lastxycount[i][j]
336 : xycount[i][j]);
337 lastxycount[i][j] = xycount[i][j];
338 } else {
339 PerlIO_printf(PerlIO_stderr(), " . ", xycount[i][j]);
340 }
341 }
342 PerlIO_printf(PerlIO_stderr(), "\n");
343 }
344 }
345 if (flag != 2) {
346 PerlIO_printf(PerlIO_stderr(), "Total %7ld ", total);
347 for (j = 0; j < MAXYCOUNT; j++) {
348 if (subtot[j]) {
349 PerlIO_printf(PerlIO_stderr(), "%3ld ", subtot[j]);
350 } else {
351 PerlIO_printf(PerlIO_stderr(), " . ");
352 }
8d063cd8 353 }
8c52afec 354 PerlIO_printf(PerlIO_stderr(), "\n");
8d063cd8 355 }
8d063cd8 356}
a687059c
LW		 357
358#endif /* LEAKTEST */
8d063cd8
LW		 359
360/* copy a string up to some (non-backslashed) delimiter, if any */
361
362char *
864dbfa3 363Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
8d063cd8 364{
fc36a67e 365 register I32 tolen;
366 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 367 if (*from == '\\') {
368 if (from[1] == delim)
369 from++;
fc36a67e 370 else {
371 if (to < toend)
372 *to++ = *from;
373 tolen++;
374 from++;
375 }
378cc40b 376 }
bedebaa5 377 else if (*from == delim)
8d063cd8 378 break;
fc36a67e 379 if (to < toend)
380 *to++ = *from;
8d063cd8 381 }
bedebaa5
CS		 382 if (to < toend)
383 *to = '\0';
fc36a67e 384 *retlen = tolen;
8d063cd8
LW		 385 return from;
386}
387
388/* return ptr to little string in big string, NULL if not found */
378cc40b 389/* This routine was donated by Corey Satten. */
8d063cd8
LW		 390
391char *
864dbfa3 392Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 393{
08105a92 394 register const char *s, *x;
79072805 395 register I32 first;
378cc40b 396
a687059c 397 if (!little)
08105a92 398 return (char*)big;
a687059c 399 first = *little++;
378cc40b 400 if (!first)
08105a92 401 return (char*)big;
378cc40b
LW		 402 while (*big) {
403 if (*big++ != first)
404 continue;
405 for (x=big,s=little; *s; /**/ ) {
406 if (!*x)
407 return Nullch;
408 if (*s++ != *x++) {
409 s--;
410 break;
411 }
412 }
413 if (!*s)
08105a92 414 return (char*)(big-1);
378cc40b
LW		 415 }
416 return Nullch;
417}
8d063cd8 418
a687059c
LW		 419/* same as instr but allow embedded nulls */
420
421char *
864dbfa3 422Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 423{
08105a92 424 register const char *s, *x;
79072805 425 register I32 first = *little;
08105a92 426 register const char *littleend = lend;
378cc40b 427
a0d0e21e 428 if (!first && little >= littleend)
08105a92 429 return (char*)big;
de3bb511
LW		 430 if (bigend - big < littleend - little)
431 return Nullch;
a687059c
LW		 432 bigend -= littleend - little++;
433 while (big <= bigend) {
434 if (*big++ != first)
435 continue;
436 for (x=big,s=little; s < littleend; /**/ ) {
437 if (*s++ != *x++) {
438 s--;
439 break;
440 }
441 }
442 if (s >= littleend)
08105a92 443 return (char*)(big-1);
378cc40b 444 }
a687059c
LW		 445 return Nullch;
446}
447
448/* reverse of the above--find last substring */
449
450char *
864dbfa3 451Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 452{
08105a92
GS		 453 register const char *bigbeg;
454 register const char *s, *x;
79072805 455 register I32 first = *little;
08105a92 456 register const char *littleend = lend;
a687059c 457
a0d0e21e 458 if (!first && little >= littleend)
08105a92 459 return (char*)bigend;
a687059c
LW		 460 bigbeg = big;
461 big = bigend - (littleend - little++);
462 while (big >= bigbeg) {
463 if (*big-- != first)
464 continue;
465 for (x=big+2,s=little; s < littleend; /**/ ) {
466 if (*s++ != *x++) {
467 s--;
468 break;
469 }
470 }
471 if (s >= littleend)
08105a92 472 return (char*)(big+1);
378cc40b 473 }
a687059c 474 return Nullch;
378cc40b 475}
a687059c 476
bbce6d69 477/*
478 * Set up for a new ctype locale.
479 */
55497cff 480void
864dbfa3 481Perl_new_ctype(pTHX_ const char *newctype)
ef7eada9 482{
36477c24 483#ifdef USE_LOCALE_CTYPE
484
bbce6d69 485 int i;
ef7eada9 486
bbce6d69 487 for (i = 0; i < 256; i++) {
488 if (isUPPER_LC(i))
22c35a8c 489 PL_fold_locale[i] = toLOWER_LC(i);
bbce6d69 490 else if (isLOWER_LC(i))
22c35a8c 491 PL_fold_locale[i] = toUPPER_LC(i);
bbce6d69 492 else
22c35a8c 493 PL_fold_locale[i] = i;
bbce6d69 494 }
bbce6d69 495
36477c24 496#endif /* USE_LOCALE_CTYPE */
497}
bbce6d69 498
499/*
500 * Set up for a new collation locale.
501 */
502void
864dbfa3 503Perl_new_collate(pTHX_ const char *newcoll)
bbce6d69 504{
36477c24 505#ifdef USE_LOCALE_COLLATE
506
bbce6d69 507 if (! newcoll) {
3280af22
NIS		 508 if (PL_collation_name) {
509 ++PL_collation_ix;
510 Safefree(PL_collation_name);
511 PL_collation_name = NULL;
512 PL_collation_standard = TRUE;
513 PL_collxfrm_base = 0;
514 PL_collxfrm_mult = 2;
bbce6d69 515 }
516 return;
517 }
518
3280af22
NIS		 519 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
520 ++PL_collation_ix;
521 Safefree(PL_collation_name);
522 PL_collation_name = savepv(newcoll);
523 PL_collation_standard = (strEQ(newcoll, "C") || strEQ(newcoll, "POSIX"));
bbce6d69 524
bbce6d69 525 {
526 /* 2: at most so many chars ('a', 'b'). */
527 /* 50: surely no system expands a char more. */
528#define XFRMBUFSIZE (2 * 50)
529 char xbuf[XFRMBUFSIZE];
530 Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
531 Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
532 SSize_t mult = fb - fa;
533 if (mult < 1)
cea2e8a9 534 Perl_croak(aTHX_ "strxfrm() gets absurd");
3280af22
NIS		 535 PL_collxfrm_base = (fa > mult) ? (fa - mult) : 0;
536 PL_collxfrm_mult = mult;
bbce6d69 537 }
bbce6d69 538 }
bbce6d69 539
36477c24 540#endif /* USE_LOCALE_COLLATE */
541}
bbce6d69 542
097ee67d
JH		 543void
544perl_set_numeric_radix(void)
545{
546#ifdef USE_LOCALE_NUMERIC
547# ifdef HAS_LOCALECONV
548 struct lconv* lc;
549
550 lc = localeconv();
551 if (lc && lc->decimal_point)
552 /* We assume that decimal separator aka the radix
553 * character is always a single character. If it
554 * ever is a string, this needs to be rethunk. */
555 PL_numeric_radix = *lc->decimal_point;
556 else
557 PL_numeric_radix = 0;
558# endif /* HAS_LOCALECONV */
559#else
560 PL_numeric_radix = 0;
561#endif /* USE_LOCALE_NUMERIC */
562}
563
bbce6d69 564/*
565 * Set up for a new numeric locale.
566 */
567void
864dbfa3 568Perl_new_numeric(pTHX_ const char *newnum)
bbce6d69 569{
36477c24 570#ifdef USE_LOCALE_NUMERIC
571
bbce6d69 572 if (! newnum) {
3280af22
NIS		 573 if (PL_numeric_name) {
574 Safefree(PL_numeric_name);
575 PL_numeric_name = NULL;
576 PL_numeric_standard = TRUE;
577 PL_numeric_local = TRUE;
bbce6d69 578 }
579 return;
580 }
581
3280af22
NIS		 582 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
583 Safefree(PL_numeric_name);
584 PL_numeric_name = savepv(newnum);
585 PL_numeric_standard = (strEQ(newnum, "C") || strEQ(newnum, "POSIX"));
586 PL_numeric_local = TRUE;
097ee67d 587 perl_set_numeric_radix();
bbce6d69 588 }
36477c24 589
590#endif /* USE_LOCALE_NUMERIC */
bbce6d69 591}
592
593void
864dbfa3 594Perl_set_numeric_standard(pTHX)
bbce6d69 595{
5f05dabc 596#ifdef USE_LOCALE_NUMERIC
597
3280af22 598 if (! PL_numeric_standard) {
bbce6d69 599 setlocale(LC_NUMERIC, "C");
3280af22
NIS		 600 PL_numeric_standard = TRUE;
601 PL_numeric_local = FALSE;
bbce6d69 602 }
5f05dabc 603
604#endif /* USE_LOCALE_NUMERIC */
bbce6d69 605}
606
607void
864dbfa3 608Perl_set_numeric_local(pTHX)
bbce6d69 609{
5f05dabc 610#ifdef USE_LOCALE_NUMERIC
611
3280af22
NIS		 612 if (! PL_numeric_local) {
613 setlocale(LC_NUMERIC, PL_numeric_name);
614 PL_numeric_standard = FALSE;
615 PL_numeric_local = TRUE;
097ee67d 616 perl_set_numeric_radix();
bbce6d69 617 }
bbce6d69 618
36477c24 619#endif /* USE_LOCALE_NUMERIC */
5f05dabc 620}
36477c24 621
36477c24 622/*
623 * Initialize locale awareness.
624 */
f0c5b223 625int
864dbfa3 626Perl_init_i18nl10n(pTHX_ int printwarn)
f0c5b223
TB		 627{
628 int ok = 1;
629 /* returns
630 * 1 = set ok or not applicable,
631 * 0 = fallback to C locale,
632 * -1 = fallback to C locale failed
633 */
bbce6d69 634
36477c24 635#ifdef USE_LOCALE
bbce6d69 636
36477c24 637#ifdef USE_LOCALE_CTYPE
bbce6d69 638 char *curctype = NULL;
36477c24 639#endif /* USE_LOCALE_CTYPE */
640#ifdef USE_LOCALE_COLLATE
bbce6d69 641 char *curcoll = NULL;
36477c24 642#endif /* USE_LOCALE_COLLATE */
643#ifdef USE_LOCALE_NUMERIC
bbce6d69 644 char *curnum = NULL;
36477c24 645#endif /* USE_LOCALE_NUMERIC */
3aeabbed
JH		 646#ifdef __GLIBC__
647 char *language = PerlEnv_getenv("LANGUAGE");
648#endif
76e3520e
GS		 649 char *lc_all = PerlEnv_getenv("LC_ALL");
650 char *lang = PerlEnv_getenv("LANG");
bbce6d69 651 bool setlocale_failure = FALSE;
f0c5b223 652
02b32252
CS		 653#ifdef LOCALE_ENVIRON_REQUIRED
654
655 /*
656 * Ultrix setlocale(..., "") fails if there are no environment
657 * variables from which to get a locale name.
658 */
659
660 bool done = FALSE;
661
662#ifdef LC_ALL
663 if (lang) {
664 if (setlocale(LC_ALL, ""))
665 done = TRUE;
666 else
667 setlocale_failure = TRUE;
668 }
0644c9cb 669 if (!setlocale_failure) {
02b32252 670#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 671 if (! (curctype =
672 setlocale(LC_CTYPE,
673 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
02b32252
CS		 674 ? "" : Nullch)))
675 setlocale_failure = TRUE;
676#endif /* USE_LOCALE_CTYPE */
677#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 678 if (! (curcoll =
679 setlocale(LC_COLLATE,
680 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
02b32252
CS		 681 ? "" : Nullch)))
682 setlocale_failure = TRUE;
683#endif /* USE_LOCALE_COLLATE */
684#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 685 if (! (curnum =
686 setlocale(LC_NUMERIC,
687 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
02b32252
CS		 688 ? "" : Nullch)))
689 setlocale_failure = TRUE;
690#endif /* USE_LOCALE_NUMERIC */
691 }
692
0644c9cb 693#endif /* LC_ALL */
02b32252 694
0644c9cb 695#endif /* !LOCALE_ENVIRON_REQUIRED */
5f05dabc 696
0644c9cb 697#ifdef LC_ALL
bbce6d69 698 if (! setlocale(LC_ALL, ""))
699 setlocale_failure = TRUE;
0644c9cb 700#endif /* LC_ALL */
bbce6d69 701
0644c9cb 702 if (!setlocale_failure) {
36477c24 703#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 704 if (! (curctype = setlocale(LC_CTYPE, "")))
705 setlocale_failure = TRUE;
36477c24 706#endif /* USE_LOCALE_CTYPE */
707#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 708 if (! (curcoll = setlocale(LC_COLLATE, "")))
709 setlocale_failure = TRUE;
36477c24 710#endif /* USE_LOCALE_COLLATE */
711#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 712 if (! (curnum = setlocale(LC_NUMERIC, "")))
713 setlocale_failure = TRUE;
36477c24 714#endif /* USE_LOCALE_NUMERIC */
0644c9cb 715 }
02b32252 716
5f05dabc 717 if (setlocale_failure) {
718 char *p;
719 bool locwarn = (printwarn > 1 ||
720 printwarn &&
76e3520e 721 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)));
20cec16a 722
5f05dabc 723 if (locwarn) {
724#ifdef LC_ALL
725
726 PerlIO_printf(PerlIO_stderr(),
727 "perl: warning: Setting locale failed.\n");
728
729#else /* !LC_ALL */
730
ef7eada9 731 PerlIO_printf(PerlIO_stderr(),
bbce6d69 732 "perl: warning: Setting locale failed for the categories:\n\t");
36477c24 733#ifdef USE_LOCALE_CTYPE
bbce6d69 734 if (! curctype)
5f05dabc 735 PerlIO_printf(PerlIO_stderr(), "LC_CTYPE ");
36477c24 736#endif /* USE_LOCALE_CTYPE */
737#ifdef USE_LOCALE_COLLATE
bbce6d69 738 if (! curcoll)
5f05dabc 739 PerlIO_printf(PerlIO_stderr(), "LC_COLLATE ");
36477c24 740#endif /* USE_LOCALE_COLLATE */
741#ifdef USE_LOCALE_NUMERIC
bbce6d69 742 if (! curnum)
5f05dabc 743 PerlIO_printf(PerlIO_stderr(), "LC_NUMERIC ");
36477c24 744#endif /* USE_LOCALE_NUMERIC */
bbce6d69 745 PerlIO_printf(PerlIO_stderr(), "\n");
746
5f05dabc 747#endif /* LC_ALL */
748
760ac839 749 PerlIO_printf(PerlIO_stderr(),
bbce6d69 750 "perl: warning: Please check that your locale settings:\n");
ef7eada9 751
3aeabbed
JH		 752#ifdef __GLIBC__
753 PerlIO_printf(PerlIO_stderr(),
754 "\tLANGUAGE = %c%s%c,\n",
755 language ? '"' : '(',
756 language ? language : "unset",
757 language ? '"' : ')');
758#endif
759
ef7eada9 760 PerlIO_printf(PerlIO_stderr(),
bbce6d69 761 "\tLC_ALL = %c%s%c,\n",
762 lc_all ? '"' : '(',
763 lc_all ? lc_all : "unset",
764 lc_all ? '"' : ')');
5f05dabc 765
766 {
767 char **e;
768 for (e = environ; *e; e++) {
769 if (strnEQ(*e, "LC_", 3)
770 && strnNE(*e, "LC_ALL=", 7)
771 && (p = strchr(*e, '=')))
772 PerlIO_printf(PerlIO_stderr(), "\t%.*s = \"%s\",\n",
fb73857a 773 (int)(p - *e), *e, p + 1);
5f05dabc 774 }
775 }
776
ef7eada9 777 PerlIO_printf(PerlIO_stderr(),
bbce6d69 778 "\tLANG = %c%s%c\n",
5f05dabc 779 lang ? '"' : '(',
bbce6d69 780 lang ? lang : "unset",
781 lang ? '"' : ')');
ef7eada9 782
bbce6d69 783 PerlIO_printf(PerlIO_stderr(),
784 " are supported and installed on your system.\n");
5f05dabc 785 }
ef7eada9 786
5f05dabc 787#ifdef LC_ALL
788
789 if (setlocale(LC_ALL, "C")) {
790 if (locwarn)
791 PerlIO_printf(PerlIO_stderr(),
792 "perl: warning: Falling back to the standard locale (\"C\").\n");
bbce6d69 793 ok = 0;
ef7eada9 794 }
5f05dabc 795 else {
796 if (locwarn)
797 PerlIO_printf(PerlIO_stderr(),
798 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
799 ok = -1;
800 }
bbce6d69 801
5f05dabc 802#else /* ! LC_ALL */
803
804 if (0
36477c24 805#ifdef USE_LOCALE_CTYPE
5f05dabc 806 || !(curctype || setlocale(LC_CTYPE, "C"))
36477c24 807#endif /* USE_LOCALE_CTYPE */
808#ifdef USE_LOCALE_COLLATE
5f05dabc 809 || !(curcoll || setlocale(LC_COLLATE, "C"))
36477c24 810#endif /* USE_LOCALE_COLLATE */
811#ifdef USE_LOCALE_NUMERIC
5f05dabc 812 || !(curnum || setlocale(LC_NUMERIC, "C"))
36477c24 813#endif /* USE_LOCALE_NUMERIC */
5f05dabc 814 )
815 {
816 if (locwarn)
bbce6d69 817 PerlIO_printf(PerlIO_stderr(),
5f05dabc 818 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
819 ok = -1;
bbce6d69 820 }
5f05dabc 821
bbce6d69 822#endif /* ! LC_ALL */
5f05dabc 823
824#ifdef USE_LOCALE_CTYPE
825 curctype = setlocale(LC_CTYPE, Nullch);
826#endif /* USE_LOCALE_CTYPE */
827#ifdef USE_LOCALE_COLLATE
828 curcoll = setlocale(LC_COLLATE, Nullch);
829#endif /* USE_LOCALE_COLLATE */
830#ifdef USE_LOCALE_NUMERIC
831 curnum = setlocale(LC_NUMERIC, Nullch);
832#endif /* USE_LOCALE_NUMERIC */
ef7eada9
JH		 833 }
834
36477c24 835#ifdef USE_LOCALE_CTYPE
864dbfa3 836 new_ctype(curctype);
36477c24 837#endif /* USE_LOCALE_CTYPE */
bbce6d69 838
36477c24 839#ifdef USE_LOCALE_COLLATE
864dbfa3 840 new_collate(curcoll);
36477c24 841#endif /* USE_LOCALE_COLLATE */
bbce6d69 842
36477c24 843#ifdef USE_LOCALE_NUMERIC
864dbfa3 844 new_numeric(curnum);
36477c24 845#endif /* USE_LOCALE_NUMERIC */
ef7eada9 846
36477c24 847#endif /* USE_LOCALE */
ef7eada9 848
f0c5b223
TB		 849 return ok;
850}
851
bbce6d69 852/* Backwards compatibility. */
853int
864dbfa3 854Perl_init_i18nl14n(pTHX_ int printwarn)
bbce6d69 855{
864dbfa3 856 return init_i18nl10n(printwarn);
bbce6d69 857}
ef7eada9 858
36477c24 859#ifdef USE_LOCALE_COLLATE
ef7eada9 860
bbce6d69 861/*
862 * mem_collxfrm() is a bit like strxfrm() but with two important
863 * differences. First, it handles embedded NULs. Second, it allocates
864 * a bit more memory than needed for the transformed data itself.
865 * The real transformed data begins at offset sizeof(collationix).
866 * Please see sv_collxfrm() to see how this is used.
867 */
868char *
864dbfa3 869Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
bbce6d69 870{
871 char *xbuf;
76e3520e 872 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
bbce6d69 873
874 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
875 /* the +1 is for the terminating NUL. */
876
3280af22 877 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
76e3520e 878 New(171, xbuf, xAlloc, char);
bbce6d69 879 if (! xbuf)
880 goto bad;
881
3280af22
NIS		 882 *(U32*)xbuf = PL_collation_ix;
883 xout = sizeof(PL_collation_ix);
bbce6d69 884 for (xin = 0; xin < len; ) {
885 SSize_t xused;
886
887 for (;;) {
76e3520e 888 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
bbce6d69 889 if (xused == -1)
890 goto bad;
76e3520e 891 if (xused < xAlloc - xout)
bbce6d69 892 break;
76e3520e
GS		 893 xAlloc = (2 * xAlloc) + 1;
894 Renew(xbuf, xAlloc, char);
bbce6d69 895 if (! xbuf)
896 goto bad;
897 }
ef7eada9 898
bbce6d69 899 xin += strlen(s + xin) + 1;
900 xout += xused;
901
902 /* Embedded NULs are understood but silently skipped
903 * because they make no sense in locale collation. */
904 }
ef7eada9 905
bbce6d69 906 xbuf[xout] = '\0';
3280af22 907 *xlen = xout - sizeof(PL_collation_ix);
bbce6d69 908 return xbuf;
909
910 bad:
911 Safefree(xbuf);
912 *xlen = 0;
913 return NULL;
ef7eada9
JH		 914}
915
36477c24 916#endif /* USE_LOCALE_COLLATE */
bbce6d69 917
cf93c79d
IZ		 918#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
919
920/* As a space optimization, we do not compile tables for strings of length
921 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
922 special-cased in fbm_instr().
923
924 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
925
378cc40b 926void
864dbfa3 927Perl_fbm_compile(pTHX_ SV *sv, U32 flags /* not used yet */)
378cc40b 928{
942e002e
GS		 929 register U8 *s;
930 register U8 *table;
79072805 931 register U32 i;
0b71040e 932 STRLEN len;
79072805
LW		 933 I32 rarest = 0;
934 U32 frequency = 256;
935
cf93c79d
IZ		 936 if (flags & FBMcf_TAIL)
937 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
942e002e 938 s = (U8*)SvPV_force(sv, len);
07f14f54 939 (void)SvUPGRADE(sv, SVt_PVBM);
cf93c79d
IZ		 940 if (len == 0) /* TAIL might be on on a zero-length string. */
941 return;
02128f11 942 if (len > 2) {
cf93c79d
IZ		 943 I32 mlen = len;
944 unsigned char *sb;
945
946 if (mlen > 255)
947 mlen = 255;
948 Sv_Grow(sv,len + 256 + FBM_TABLE_OFFSET);
949 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
950 s = table - 1 - FBM_TABLE_OFFSET; /* Last char */
02128f11 951 for (i = 0; i < 256; i++) {
cf93c79d 952 table[i] = mlen;
02128f11 953 }
cf93c79d 954 table[-1] = flags; /* Not used yet */
02128f11 955 i = 0;
cf93c79d
IZ		 956 sb = s - mlen;
957 while (s >= sb) {
958 if (table[*s] == mlen)
959 table[*s] = i;
960 s--, i++;
961 }
378cc40b 962 }
bbce6d69 963 sv_magic(sv, Nullsv, 'B', Nullch, 0); /* deep magic */
79072805 964 SvVALID_on(sv);
378cc40b 965
463ee0b2 966 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
bbce6d69 967 for (i = 0; i < len; i++) {
22c35a8c 968 if (PL_freq[s[i]] < frequency) {
bbce6d69 969 rarest = i;
22c35a8c 970 frequency = PL_freq[s[i]];
378cc40b
LW		 971 }
972 }
79072805
LW		 973 BmRARE(sv) = s[rarest];
974 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ		 975 BmUSEFUL(sv) = 100; /* Initial value */
976 if (flags & FBMcf_TAIL)
977 SvTAIL_on(sv);
760ac839 978 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 979}
980
cf93c79d
IZ		 981/* If SvTAIL(littlestr), it has a fake '\n' at end. */
982/* If SvTAIL is actually due to \Z or \z, this gives false positives
983 if multiline */
984
378cc40b 985char *
864dbfa3 986Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 987{
a687059c 988 register unsigned char *s;
cf93c79d
IZ		 989 STRLEN l;
990 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
991 register STRLEN littlelen = l;
992 register I32 multiline = flags & FBMrf_MULTILINE;
993
994 if (bigend - big < littlelen) {
995 check_tail:
996 if ( SvTAIL(littlestr)
997 && (bigend - big == littlelen - 1)
998 && (littlelen == 1
999 || *big == *little && memEQ(big, little, littlelen - 1)))
1000 return (char*)big;
1001 return Nullch;
1002 }
378cc40b 1003
cf93c79d
IZ		 1004 if (littlelen <= 2) { /* Special-cased */
1005 register char c;
1006
1007 if (littlelen == 1) {
1008 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
1009 /* Know that bigend != big. */
1010 if (bigend[-1] == '\n')
1011 return (char *)(bigend - 1);
1012 return (char *) bigend;
1013 }
1014 s = big;
1015 while (s < bigend) {
1016 if (*s == *little)
1017 return (char *)s;
1018 s++;
1019 }
1020 if (SvTAIL(littlestr))
1021 return (char *) bigend;
1022 return Nullch;
1023 }
1024 if (!littlelen)
1025 return (char*)big; /* Cannot be SvTAIL! */
1026
1027 /* littlelen is 2 */
1028 if (SvTAIL(littlestr) && !multiline) {
1029 if (bigend[-1] == '\n' && bigend[-2] == *little)
1030 return (char*)bigend - 2;
1031 if (bigend[-1] == *little)
1032 return (char*)bigend - 1;
1033 return Nullch;
1034 }
1035 {
1036 /* This should be better than FBM if c1 == c2, and almost
1037 as good otherwise: maybe better since we do less indirection.
1038 And we save a lot of memory by caching no table. */
1039 register unsigned char c1 = little[0];
1040 register unsigned char c2 = little[1];
1041
1042 s = big + 1;
1043 bigend--;
1044 if (c1 != c2) {
1045 while (s <= bigend) {
1046 if (s[0] == c2) {
1047 if (s[-1] == c1)
1048 return (char*)s - 1;
1049 s += 2;
1050 continue;
3fe6f2dc 1051 }
cf93c79d
IZ		 1052 next_chars:
1053 if (s[0] == c1) {
1054 if (s == bigend)
1055 goto check_1char_anchor;
1056 if (s[1] == c2)
1057 return (char*)s;
1058 else {
1059 s++;
1060 goto next_chars;
1061 }
1062 }
1063 else
1064 s += 2;
1065 }
1066 goto check_1char_anchor;
1067 }
1068 /* Now c1 == c2 */
1069 while (s <= bigend) {
1070 if (s[0] == c1) {
1071 if (s[-1] == c1)
1072 return (char*)s - 1;
1073 if (s == bigend)
1074 goto check_1char_anchor;
1075 if (s[1] == c1)
1076 return (char*)s;
1077 s += 3;
02128f11 1078 }
c277df42 1079 else
cf93c79d 1080 s += 2;
c277df42 1081 }
c277df42 1082 }
cf93c79d
IZ		 1083 check_1char_anchor: /* One char and anchor! */
1084 if (SvTAIL(littlestr) && (*bigend == *little))
1085 return (char *)bigend; /* bigend is already decremented. */
1086 return Nullch;
d48672a2 1087 }
cf93c79d 1088 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 1089 s = bigend - littlelen;
cf93c79d 1090 if (s >= big
02128f11 1091 && bigend[-1] == '\n'
cf93c79d
IZ		 1092 && *s == *little
1093 /* Automatically of length > 2 */
1094 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
bbce6d69 1095 return (char*)s; /* how sweet it is */
cf93c79d
IZ		 1096 if (s[1] == *little && memEQ((char*)s + 2,(char*)little + 1,
1097 littlelen - 2))
1098 return (char*)s + 1; /* how sweet it is */
02128f11
IZ		 1099 return Nullch;
1100 }
cf93c79d
IZ		 1101 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
1102 char *b = ninstr((char*)big,(char*)bigend,
1103 (char*)little, (char*)little + littlelen);
1104
1105 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
1106 /* Chop \n from littlestr: */
1107 s = bigend - littlelen + 1;
1108 if (*s == *little && memEQ((char*)s + 1, (char*)little + 1,
1109 littlelen - 2))
3fe6f2dc 1110 return (char*)s;
cf93c79d 1111 return Nullch;
a687059c 1112 }
cf93c79d 1113 return b;
a687059c 1114 }
cf93c79d
IZ		 1115
1116 { /* Do actual FBM. */
1117 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
1118 register unsigned char *oldlittle;
1119
1120 if (littlelen > bigend - big)
1121 return Nullch;
1122 --littlelen; /* Last char found by table lookup */
1123
1124 s = big + littlelen;
1125 little += littlelen; /* last char */
1126 oldlittle = little;
1127 if (s < bigend) {
1128 register I32 tmp;
1129
1130 top2:
1131 /*SUPPRESS 560*/
1132 if (tmp = table[*s]) {
62b28dd9 1133#ifdef POINTERRIGOR
cf93c79d
IZ		 1134 if (bigend - s > tmp) {
1135 s += tmp;
1136 goto top2;
1137 }
bbce6d69 1138 s += tmp;
62b28dd9 1139#else
cf93c79d 1140 if ((s += tmp) < bigend)
62b28dd9 1141 goto top2;
cf93c79d
IZ		 1142#endif
1143 goto check_end;
1144 }
1145 else { /* less expensive than calling strncmp() */
1146 register unsigned char *olds = s;
1147
1148 tmp = littlelen;
1149
1150 while (tmp--) {
1151 if (*--s == *--little)
1152 continue;
1153 differ:
1154 s = olds + 1; /* here we pay the price for failure */
1155 little = oldlittle;
1156 if (s < bigend) /* fake up continue to outer loop */
1157 goto top2;
1158 goto check_end;
1159 }
1160 return (char *)s;
a687059c 1161 }
378cc40b 1162 }
cf93c79d
IZ		 1163 check_end:
1164 if ( s == bigend && (table[-1] & FBMcf_TAIL)
1165 && memEQ(bigend - littlelen, oldlittle - littlelen, littlelen) )
1166 return (char*)bigend - littlelen;
1167 return Nullch;
378cc40b 1168 }
378cc40b
LW		 1169}
1170
c277df42
IZ		 1171/* start_shift, end_shift are positive quantities which give offsets
1172 of ends of some substring of bigstr.
1173 If `last' we want the last occurence.
1174 old_posp is the way of communication between consequent calls if
1175 the next call needs to find the .
1176 The initial *old_posp should be -1.
cf93c79d
IZ		 1177
1178 Note that we take into account SvTAIL, so one can get extra
1179 optimizations if _ALL flag is set.
c277df42
IZ		 1180 */
1181
cf93c79d
IZ		 1182/* If SvTAIL is actually due to \Z or \z, this gives false positives
1183 if PL_multiline. In fact if !PL_multiline the autoritative answer
1184 is not supported yet. */
1185
378cc40b 1186char *
864dbfa3 1187Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 1188{
5c0ca799 1189 dTHR;
a687059c
LW		 1190 register unsigned char *s, *x;
1191 register unsigned char *big;
79072805
LW		 1192 register I32 pos;
1193 register I32 previous;
1194 register I32 first;
a687059c 1195 register unsigned char *little;
c277df42 1196 register I32 stop_pos;
a687059c 1197 register unsigned char *littleend;
c277df42 1198 I32 found = 0;
378cc40b 1199
c277df42 1200 if (*old_posp == -1
3280af22 1201 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 1202 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
1203 cant_find:
1204 if ( BmRARE(littlestr) == '\n'
1205 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
1206 little = (unsigned char *)(SvPVX(littlestr));
1207 littleend = little + SvCUR(littlestr);
1208 first = *little++;
1209 goto check_tail;
1210 }
378cc40b 1211 return Nullch;
cf93c79d
IZ		 1212 }
1213
463ee0b2 1214 little = (unsigned char *)(SvPVX(littlestr));
79072805 1215 littleend = little + SvCUR(littlestr);
378cc40b 1216 first = *little++;
c277df42 1217 /* The value of pos we can start at: */
79072805 1218 previous = BmPREVIOUS(littlestr);
463ee0b2 1219 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ		 1220 /* The value of pos we can stop at: */
1221 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d
IZ		 1222 if (previous + start_shift > stop_pos) {
1223 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
1224 goto check_tail;
1225 return Nullch;
1226 }
c277df42 1227 while (pos < previous + start_shift) {
3280af22 1228 if (!(pos += PL_screamnext[pos]))
cf93c79d 1229 goto cant_find;
378cc40b 1230 }
de3bb511 1231#ifdef POINTERRIGOR
bbce6d69 1232 do {
ef64f398 1233 if (pos >= stop_pos) break;
bbce6d69 1234 if (big[pos-previous] != first)
1235 continue;
1236 for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) {
bbce6d69 1237 if (*s++ != *x++) {
1238 s--;
1239 break;
de3bb511 1240 }
bbce6d69 1241 }
c277df42
IZ		 1242 if (s == littleend) {
1243 *old_posp = pos;
1244 if (!last) return (char *)(big+pos-previous);
1245 found = 1;
1246 }
6b88bc9c 1247 } while ( pos += PL_screamnext[pos] );
c277df42 1248 return (last && found) ? (char *)(big+(*old_posp)-previous) : Nullch;
de3bb511
LW		 1249#else /* !POINTERRIGOR */
1250 big -= previous;
bbce6d69 1251 do {
ef64f398 1252 if (pos >= stop_pos) break;
bbce6d69 1253 if (big[pos] != first)
1254 continue;
1255 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 1256 if (*s++ != *x++) {
1257 s--;
1258 break;
378cc40b 1259 }
bbce6d69 1260 }
c277df42
IZ		 1261 if (s == littleend) {
1262 *old_posp = pos;
1263 if (!last) return (char *)(big+pos);
1264 found = 1;
1265 }
3280af22 1266 } while ( pos += PL_screamnext[pos] );
cf93c79d
IZ		 1267 if (last && found)
1268 return (char *)(big+(*old_posp));
de3bb511 1269#endif /* POINTERRIGOR */
cf93c79d
IZ		 1270 check_tail:
1271 if (!SvTAIL(littlestr) || (end_shift > 0))
1272 return Nullch;
1273 /* Ignore the trailing "\n". This code is not microoptimized */
1274 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
1275 stop_pos = littleend - little; /* Actual littlestr len */
1276 if (stop_pos == 0)
1277 return (char*)big;
1278 big -= stop_pos;
1279 if (*big == first
1280 && ((stop_pos == 1) || memEQ(big + 1, little, stop_pos - 1)))
1281 return (char*)big;
1282 return Nullch;
8d063cd8
LW		 1283}
1284
79072805 1285I32
864dbfa3 1286Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 1287{
bbce6d69 1288 register U8 *a = (U8 *)s1;
1289 register U8 *b = (U8 *)s2;
79072805 1290 while (len--) {
22c35a8c 1291 if (*a != *b && *a != PL_fold[*b])
bbce6d69 1292 return 1;
1293 a++,b++;
1294 }
1295 return 0;
1296}
1297
1298I32
864dbfa3 1299Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 1300{
1301 register U8 *a = (U8 *)s1;
1302 register U8 *b = (U8 *)s2;
1303 while (len--) {
22c35a8c 1304 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 1305 return 1;
1306 a++,b++;
79072805
LW		 1307 }
1308 return 0;
1309}
1310
8d063cd8
LW		 1311/* copy a string to a safe spot */
1312
1313char *
864dbfa3 1314Perl_savepv(pTHX_ const char *sv)
8d063cd8 1315{
a687059c 1316 register char *newaddr;
8d063cd8 1317
79072805
LW		 1318 New(902,newaddr,strlen(sv)+1,char);
1319 (void)strcpy(newaddr,sv);
8d063cd8
LW		 1320 return newaddr;
1321}
1322
a687059c
LW		 1323/* same thing but with a known length */
1324
1325char *
864dbfa3 1326Perl_savepvn(pTHX_ const char *sv, register I32 len)
a687059c
LW		 1327{
1328 register char *newaddr;
1329
1330 New(903,newaddr,len+1,char);
79072805 1331 Copy(sv,newaddr,len,char); /* might not be null terminated */
a687059c
LW		 1332 newaddr[len] = '\0'; /* is now */
1333 return newaddr;
1334}
1335
cea2e8a9 1336/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1337
76e3520e 1338STATIC SV *
cea2e8a9 1339S_mess_alloc(pTHX)
fc36a67e 1340{
e72dc28c 1341 dTHR;
fc36a67e 1342 SV *sv;
1343 XPVMG *any;
1344
e72dc28c
GS		 1345 if (!PL_dirty)
1346 return sv_2mortal(newSVpvn("",0));
1347
0372dbb6
GS		 1348 if (PL_mess_sv)
1349 return PL_mess_sv;
1350
fc36a67e 1351 /* Create as PVMG now, to avoid any upgrading later */
1352 New(905, sv, 1, SV);
1353 Newz(905, any, 1, XPVMG);
1354 SvFLAGS(sv) = SVt_PVMG;
1355 SvANY(sv) = (void*)any;
1356 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1357 PL_mess_sv = sv;
fc36a67e 1358 return sv;
1359}
1360
cea2e8a9
GS		 1361#ifdef PERL_IMPLICIT_CONTEXT
1362char *
1363Perl_form_nocontext(const char* pat, ...)
1364{
1365 dTHX;
1366 SV *sv = mess_alloc();
1367 va_list args;
1368 va_start(args, pat);
1369 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
1370 va_end(args);
1371 return SvPVX(sv);
1372}
1373#endif
1374
8990e307 1375char *
864dbfa3 1376Perl_form(pTHX_ const char* pat, ...)
8990e307 1377{
e72dc28c 1378 SV *sv = mess_alloc();
46fc3d4c 1379 va_list args;
46fc3d4c 1380 va_start(args, pat);
e72dc28c 1381 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
46fc3d4c 1382 va_end(args);
e72dc28c 1383 return SvPVX(sv);
46fc3d4c 1384}
a687059c 1385
06bf62c7 1386SV *
864dbfa3 1387Perl_mess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1388{
e72dc28c 1389 SV *sv = mess_alloc();
46fc3d4c 1390 static char dgd[] = " during global destruction.\n";
1391
fc36a67e 1392 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1393 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
e858de61 1394 dTHR;
515f54a1 1395 if (PL_curcop->cop_line)
cea2e8a9 1396 Perl_sv_catpvf(aTHX_ sv, " at %_ line %ld",
515f54a1
GS		 1397 GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
1398 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1399 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1400 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
cea2e8a9 1401 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %ld",
515f54a1
GS		 1402 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1403 line_mode ? "line" : "chunk",
1404 (long)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1405 }
515f54a1 1406 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1407 }
06bf62c7 1408 return sv;
a687059c
LW		 1409}
1410
0cb96387
GS		 1411STATIC OP *
1412S_do_die(pTHX_ const char* pat, va_list *args)
36477c24 1413{
5dc0d613 1414 dTHR;
36477c24 1415 char *message;
3280af22 1416 int was_in_eval = PL_in_eval;
36477c24 1417 HV *stash;
1418 GV *gv;
1419 CV *cv;
06bf62c7
GS		 1420 SV *msv;
1421 STRLEN msglen;
36477c24 1422
8b73bbec 1423 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1424 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1425 thr, PL_curstack, PL_mainstack));
36477c24 1426
06bf62c7 1427 if (pat) {
cea2e8a9 1428 msv = mess(pat, args);
06bf62c7
GS		 1429 message = SvPV(msv,msglen);
1430 }
1431 else {
1432 message = Nullch;
1433 }
36477c24 1434
8b73bbec 1435 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
199100c8 1436 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1437 thr, message, PL_diehook));
3280af22 1438 if (PL_diehook) {
cea2e8a9 1439 /* sv_2cv might call Perl_croak() */
3280af22 1440 SV *olddiehook = PL_diehook;
1738f5c4 1441 ENTER;
3280af22
NIS		 1442 SAVESPTR(PL_diehook);
1443 PL_diehook = Nullsv;
1738f5c4
CS		 1444 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1445 LEAVE;
1446 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1447 dSP;
774d564b 1448 SV *msg;
1449
1450 ENTER;
79cb57f6 1451 if (message) {
06bf62c7 1452 msg = newSVpvn(message, msglen);
4e6ea2c3
GS		 1453 SvREADONLY_on(msg);
1454 SAVEFREESV(msg);
1455 }
1456 else {
1457 msg = ERRSV;
1458 }
1738f5c4 1459
e788e7d3 1460 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1461 PUSHMARK(SP);
1738f5c4
CS		 1462 XPUSHs(msg);
1463 PUTBACK;
864dbfa3 1464 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1465 POPSTACK;
774d564b 1466 LEAVE;
1738f5c4 1467 }
36477c24 1468 }
1469
06bf62c7 1470 PL_restartop = die_where(message, msglen);
8b73bbec 1471 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
7c06b590 1472 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1473 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1474 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1475 JMPENV_JUMP(3);
3280af22 1476 return PL_restartop;
36477c24 1477}
1478
cea2e8a9
GS		 1479#ifdef PERL_IMPLICIT_CONTEXT
1480OP *
1481Perl_die_nocontext(const char* pat, ...)
a687059c 1482{
cea2e8a9
GS		 1483 dTHX;
1484 OP *o;
a687059c 1485 va_list args;
cea2e8a9
GS		 1486 va_start(args, pat);
1487 o = do_die(aTHX_ pat, &args);
1488 va_end(args);
1489 return o;
1490}
1491#endif
1492
1493OP *
1494Perl_die(pTHX_ const char* pat, ...)
1495{
1496 OP *o;
1497 va_list args;
1498 va_start(args, pat);
1499 o = do_die(aTHX_ pat, &args);
1500 va_end(args);
1501 return o;
1502}
1503
1504STATIC void
1505S_do_croak(pTHX_ const char* pat, va_list *args)
1506{
1507 dTHR;
de3bb511 1508 char *message;
748a9306
LW		 1509 HV *stash;
1510 GV *gv;
1511 CV *cv;
06bf62c7
GS		 1512 SV *msv;
1513 STRLEN msglen;
a687059c 1514
cea2e8a9 1515 msv = mess(pat, args);
06bf62c7 1516 message = SvPV(msv,msglen);
8b73bbec 1517 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
3280af22 1518 if (PL_diehook) {
cea2e8a9 1519 /* sv_2cv might call Perl_croak() */
3280af22 1520 SV *olddiehook = PL_diehook;
1738f5c4 1521 ENTER;
3280af22
NIS		 1522 SAVESPTR(PL_diehook);
1523 PL_diehook = Nullsv;
20cec16a 1524 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS		 1525 LEAVE;
1526 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1527 dSP;
774d564b 1528 SV *msg;
1529
1530 ENTER;
06bf62c7 1531 msg = newSVpvn(message, msglen);
774d564b 1532 SvREADONLY_on(msg);
1533 SAVEFREESV(msg);
20cec16a 1534
e788e7d3 1535 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1536 PUSHMARK(SP);
1738f5c4 1537 XPUSHs(msg);
20cec16a 1538 PUTBACK;
864dbfa3 1539 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1540 POPSTACK;
774d564b 1541 LEAVE;
20cec16a 1542 }
748a9306 1543 }
3280af22 1544 if (PL_in_eval) {
06bf62c7 1545 PL_restartop = die_where(message, msglen);
6224f72b 1546 JMPENV_JUMP(3);
a0d0e21e 1547 }
d175a3f0
GS		 1548 {
1549#ifdef USE_SFIO
1550 /* SFIO can really mess with your errno */
1551 int e = errno;
1552#endif
06bf62c7 1553 PerlIO_write(PerlIO_stderr(), message, msglen);
d175a3f0
GS		 1554 (void)PerlIO_flush(PerlIO_stderr());
1555#ifdef USE_SFIO
1556 errno = e;
1557#endif
1558 }
f86702cc 1559 my_failure_exit();
a687059c
LW		 1560}
1561
cea2e8a9 1562#ifdef PERL_IMPLICIT_CONTEXT
8990e307 1563void
cea2e8a9 1564Perl_croak_nocontext(const char *pat, ...)
a687059c 1565{
cea2e8a9 1566 dTHX;
a687059c 1567 va_list args;
cea2e8a9
GS		 1568 va_start(args, pat);
1569 do_croak(pat, &args);
1570 /* NOTREACHED */
1571 va_end(args);
1572}
1573#endif /* PERL_IMPLICIT_CONTEXT */
1574
1575void
1576Perl_croak(pTHX_ const char *pat, ...)
1577{
1578 va_list args;
1579 va_start(args, pat);
1580 do_croak(pat, &args);
1581 /* NOTREACHED */
1582 va_end(args);
1583}
1584
1585STATIC void
1586S_do_warn(pTHX_ const char* pat, va_list *args)
1587{
de3bb511 1588 char *message;
748a9306
LW		 1589 HV *stash;
1590 GV *gv;
1591 CV *cv;
06bf62c7
GS		 1592 SV *msv;
1593 STRLEN msglen;
a687059c 1594
cea2e8a9 1595 msv = mess(pat, args);
06bf62c7 1596 message = SvPV(msv, msglen);
a687059c 1597
3280af22 1598 if (PL_warnhook) {
cea2e8a9 1599 /* sv_2cv might call Perl_warn() */
11343788 1600 dTHR;
3280af22 1601 SV *oldwarnhook = PL_warnhook;
1738f5c4 1602 ENTER;
3280af22
NIS		 1603 SAVESPTR(PL_warnhook);
1604 PL_warnhook = Nullsv;
20cec16a 1605 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1606 LEAVE;
1607 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1608 dSP;
774d564b 1609 SV *msg;
1610
1611 ENTER;
06bf62c7 1612 msg = newSVpvn(message, msglen);
774d564b 1613 SvREADONLY_on(msg);
1614 SAVEFREESV(msg);
1615
e788e7d3 1616 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1617 PUSHMARK(SP);
774d564b 1618 XPUSHs(msg);
20cec16a 1619 PUTBACK;
864dbfa3 1620 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1621 POPSTACK;
774d564b 1622 LEAVE;
20cec16a 1623 return;
1624 }
748a9306 1625 }
06bf62c7 1626 PerlIO_write(PerlIO_stderr(), message, msglen);
a687059c 1627#ifdef LEAKTEST
8c52afec
IZ		 1628 DEBUG_L(*message == '!'
1629 ? (xstat(message[1]=='!'
1630 ? (message[2]=='!' ? 2 : 1)
1631 : 0)
1632 , 0)
1633 : 0);
a687059c 1634#endif
20cec16a 1635 (void)PerlIO_flush(PerlIO_stderr());
a687059c 1636}
8d063cd8 1637
cea2e8a9
GS		 1638#ifdef PERL_IMPLICIT_CONTEXT
1639void
1640Perl_warn_nocontext(const char *pat, ...)
1641{
1642 dTHX;
1643 va_list args;
1644 va_start(args, pat);
1645 do_warn(pat, &args);
1646 va_end(args);
1647}
1648#endif /* PERL_IMPLICIT_CONTEXT */
1649
1650void
1651Perl_warn(pTHX_ const char *pat, ...)
1652{
1653 va_list args;
1654 va_start(args, pat);
1655 do_warn(pat, &args);
1656 va_end(args);
1657}
1658
599cee73 1659void
864dbfa3 1660Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73 1661{
d008e5eb 1662 dTHR;
599cee73
PM		 1663 va_list args;
1664 char *message;
1665 HV *stash;
1666 GV *gv;
1667 CV *cv;
06bf62c7
GS		 1668 SV *msv;
1669 STRLEN msglen;
599cee73
PM		 1670
1671 va_start(args, pat);
06bf62c7
GS		 1672 msv = mess(pat, &args);
1673 message = SvPV(msv, msglen);
599cee73
PM		 1674 va_end(args);
1675
1676 if (ckDEAD(err)) {
1677#ifdef USE_THREADS
d008e5eb 1678 DEBUG_S(PerlIO_printf(PerlIO_stderr(), "croak: 0x%lx %s", (unsigned long) thr, message));
599cee73
PM		 1679#endif /* USE_THREADS */
1680 if (PL_diehook) {
cea2e8a9 1681 /* sv_2cv might call Perl_croak() */
599cee73
PM		 1682 SV *olddiehook = PL_diehook;
1683 ENTER;
1684 SAVESPTR(PL_diehook);
1685 PL_diehook = Nullsv;
1686 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1687 LEAVE;
1688 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1689 dSP;
1690 SV *msg;
1691
1692 ENTER;
06bf62c7 1693 msg = newSVpvn(message, msglen);
599cee73
PM		 1694 SvREADONLY_on(msg);
1695 SAVEFREESV(msg);
1696
1697 PUSHMARK(sp);
1698 XPUSHs(msg);
1699 PUTBACK;
864dbfa3 1700 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1701
1702 LEAVE;
1703 }
1704 }
1705 if (PL_in_eval) {
06bf62c7 1706 PL_restartop = die_where(message, msglen);
599cee73
PM		 1707 JMPENV_JUMP(3);
1708 }
06bf62c7 1709 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1710 (void)PerlIO_flush(PerlIO_stderr());
1711 my_failure_exit();
1712
1713 }
1714 else {
1715 if (PL_warnhook) {
cea2e8a9 1716 /* sv_2cv might call Perl_warn() */
599cee73
PM		 1717 dTHR;
1718 SV *oldwarnhook = PL_warnhook;
1719 ENTER;
1720 SAVESPTR(PL_warnhook);
1721 PL_warnhook = Nullsv;
1722 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1723 LEAVE;
1724 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1725 dSP;
1726 SV *msg;
1727
1728 ENTER;
06bf62c7 1729 msg = newSVpvn(message, msglen);
599cee73
PM		 1730 SvREADONLY_on(msg);
1731 SAVEFREESV(msg);
1732
1733 PUSHMARK(sp);
1734 XPUSHs(msg);
1735 PUTBACK;
864dbfa3 1736 call_sv((SV*)cv, G_DISCARD);
599cee73
PM		 1737
1738 LEAVE;
1739 return;
1740 }
1741 }
06bf62c7 1742 PerlIO_write(PerlIO_stderr(), message, msglen);
599cee73
PM		 1743#ifdef LEAKTEST
1744 DEBUG_L(xstat());
1745#endif
1746 (void)PerlIO_flush(PerlIO_stderr());
1747 }
1748}
1749
a0d0e21e 1750#ifndef VMS /* VMS' my_setenv() is in VMS.c */
f89d6eaa 1751#if !defined(WIN32) && !defined(CYGWIN32)
8d063cd8 1752void
864dbfa3 1753Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1754{
f2517201
GS		 1755#ifndef PERL_USE_SAFE_PUTENV
1756 /* most putenv()s leak, so we manipulate environ directly */
79072805 1757 register I32 i=setenv_getix(nam); /* where does it go? */
8d063cd8 1758
3280af22 1759 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1760 I32 j;
1761 I32 max;
fe14fcc3
LW		 1762 char **tmpenv;
1763
de3bb511 1764 /*SUPPRESS 530*/
fe14fcc3 1765 for (max = i; environ[max]; max++) ;
f2517201
GS		 1766 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1767 for (j=0; j<max; j++) { /* copy environment */
1768 tmpenv[j] = (char*)safesysmalloc((strlen(environ[j])+1)*sizeof(char));
1769 strcpy(tmpenv[j], environ[j]);
1770 }
fe14fcc3
LW		 1771 tmpenv[max] = Nullch;
1772 environ = tmpenv; /* tell exec where it is now */
1773 }
a687059c 1774 if (!val) {
f2517201 1775 safesysfree(environ[i]);
a687059c
LW		 1776 while (environ[i]) {
1777 environ[i] = environ[i+1];
1778 i++;
1779 }
1780 return;
1781 }
8d063cd8 1782 if (!environ[i]) { /* does not exist yet */
f2517201 1783 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 1784 environ[i+1] = Nullch; /* make sure it's null terminated */
1785 }
fe14fcc3 1786 else
f2517201
GS		 1787 safesysfree(environ[i]);
1788 environ[i] = (char*)safesysmalloc((strlen(nam)+strlen(val)+2) * sizeof(char));
1789
62b28dd9 1790#ifndef MSDOS
a687059c 1791 (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
62b28dd9
LW		 1792#else
1793 /* MS-DOS requires environment variable names to be in uppercase */
fe14fcc3
LW		 1794 /* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but
1795 * some utilities and applications may break because they only look
1796 * for upper case strings. (Fixed strupr() bug here.)]
1797 */
1798 strcpy(environ[i],nam); strupr(environ[i]);
62b28dd9
LW		 1799 (void)sprintf(environ[i] + strlen(nam),"=%s",val);
1800#endif /* MSDOS */
f2517201
GS		 1801
1802#else /* PERL_USE_SAFE_PUTENV */
1803 char *new_env;
1804
1805 new_env = (char*)safesysmalloc((strlen(nam) + strlen(val) + 2) * sizeof(char));
1806#ifndef MSDOS
1807 (void)sprintf(new_env,"%s=%s",nam,val);/* all that work just for this */
1808#else
1809 strcpy(new_env,nam); strupr(new_env);
1810 (void)sprintf(new_env + strlen(nam),"=%s",val);
1811#endif
1812 (void)putenv(new_env);
1813#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW		 1814}
1815
3e3baf6d 1816#else /* if WIN32 */
68dc0745 1817
1818void
864dbfa3 1819Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 1820{
3e3baf6d
TB		 1821
1822#ifdef USE_WIN32_RTL_ENV
1823
68dc0745 1824 register char *envstr;
1825 STRLEN namlen = strlen(nam);
3e3baf6d
TB		 1826 STRLEN vallen;
1827 char *oldstr = environ[setenv_getix(nam)];
1828
1829 /* putenv() has totally broken semantics in both the Borland
1830 * and Microsoft CRTLs. They either store the passed pointer in
1831 * the environment without making a copy, or make a copy and don't
1832 * free it. And on top of that, they dont free() old entries that
1833 * are being replaced/deleted. This means the caller must
1834 * free any old entries somehow, or we end up with a memory
1835 * leak every time my_setenv() is called. One might think
1836 * one could directly manipulate environ[], like the UNIX code
1837 * above, but direct changes to environ are not allowed when
1838 * calling putenv(), since the RTLs maintain an internal
1839 * *copy* of environ[]. Bad, bad, *bad* stink.
1840 * GSAR 97-06-07
1841 */
68dc0745 1842
3e3baf6d
TB		 1843 if (!val) {
1844 if (!oldstr)
1845 return;
1846 val = "";
1847 vallen = 0;
1848 }
1849 else
1850 vallen = strlen(val);
f2517201 1851 envstr = (char*)safesysmalloc((namlen + vallen + 3) * sizeof(char));
68dc0745 1852 (void)sprintf(envstr,"%s=%s",nam,val);
76e3520e 1853 (void)PerlEnv_putenv(envstr);
3e3baf6d 1854 if (oldstr)
f2517201 1855 safesysfree(oldstr);
3e3baf6d 1856#ifdef _MSC_VER
f2517201 1857 safesysfree(envstr); /* MSVCRT leaks without this */
3e3baf6d
TB		 1858#endif
1859
1860#else /* !USE_WIN32_RTL_ENV */
1861
ac5c734f
GS		 1862 register char *envstr;
1863 STRLEN len = strlen(nam) + 3;
1864 if (!val) {
1865 val = "";
1866 }
1867 len += strlen(val);
1868 New(904, envstr, len, char);
1869 (void)sprintf(envstr,"%s=%s",nam,val);
1870 (void)PerlEnv_putenv(envstr);
1871 Safefree(envstr);
3e3baf6d
TB		 1872
1873#endif
1874}
1875
1876#endif /* WIN32 */
1877
1878I32
864dbfa3 1879Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB		 1880{
1881 register I32 i, len = strlen(nam);
1882
1883 for (i = 0; environ[i]; i++) {
1884 if (
1885#ifdef WIN32
1886 strnicmp(environ[i],nam,len) == 0
1887#else
1888 strnEQ(environ[i],nam,len)
1889#endif
1890 && environ[i][len] == '=')
1891 break; /* strnEQ must come first to avoid */
1892 } /* potential SEGV's */
1893 return i;
68dc0745 1894}
1895
a0d0e21e 1896#endif /* !VMS */
378cc40b 1897
16d20bd9 1898#ifdef UNLINK_ALL_VERSIONS
79072805 1899I32
864dbfa3 1900Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1901{
79072805 1902 I32 i;
378cc40b 1903
6ad3d225 1904 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 1905 return i ? 0 : -1;
1906}
1907#endif
1908
85e6fe83 1909#if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY)
378cc40b 1910char *
864dbfa3 1911Perl_my_bcopy(pTHX_ register const char *from,register char *to,register I32 len)
378cc40b
LW		 1912{
1913 char *retval = to;
1914
7c0587c8
LW		 1915 if (from - to >= 0) {
1916 while (len--)
1917 *to++ = *from++;
1918 }
1919 else {
1920 to += len;
1921 from += len;
1922 while (len--)
faf8582f 1923 *(--to) = *(--from);
7c0587c8 1924 }
378cc40b
LW		 1925 return retval;
1926}
ffed7fef 1927#endif
378cc40b 1928
fc36a67e 1929#ifndef HAS_MEMSET
1930void *
864dbfa3 1931Perl_my_memset(pTHX_ register char *loc, register I32 ch, register I32 len)
fc36a67e 1932{
1933 char *retval = loc;
1934
1935 while (len--)
1936 *loc++ = ch;
1937 return retval;
1938}
1939#endif
1940
7c0587c8 1941#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1942char *
864dbfa3 1943Perl_my_bzero(pTHX_ register char *loc, register I32 len)
378cc40b
LW		 1944{
1945 char *retval = loc;
1946
1947 while (len--)
1948 *loc++ = 0;
1949 return retval;
1950}
1951#endif
7c0587c8 1952
36477c24 1953#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1954I32
864dbfa3 1955Perl_my_memcmp(pTHX_ const char *s1, const char *s2, register I32 len)
7c0587c8 1956{
36477c24 1957 register U8 *a = (U8 *)s1;
1958 register U8 *b = (U8 *)s2;
79072805 1959 register I32 tmp;
7c0587c8
LW		 1960
1961 while (len--) {
36477c24 1962 if (tmp = *a++ - *b++)
7c0587c8
LW		 1963 return tmp;
1964 }
1965 return 0;
1966}
36477c24 1967#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1968
fe14fcc3 1969#ifndef HAS_VPRINTF
a687059c 1970
85e6fe83 1971#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1972char *
1973#else
1974int
1975#endif
08105a92 1976vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 1977{
1978 FILE fakebuf;
1979
1980 fakebuf._ptr = dest;
1981 fakebuf._cnt = 32767;
35c8bce7
LW		 1982#ifndef _IOSTRG
1983#define _IOSTRG 0
1984#endif
a687059c
LW		 1985 fakebuf._flag = _IOWRT|_IOSTRG;
1986 _doprnt(pat, args, &fakebuf); /* what a kludge */
1987 (void)putc('\0', &fakebuf);
85e6fe83 1988#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 1989 return(dest);
1990#else
1991 return 0; /* perl doesn't use return value */
1992#endif
1993}
1994
fe14fcc3 1995#endif /* HAS_VPRINTF */
a687059c
LW		 1996
1997#ifdef MYSWAP
ffed7fef 1998#if BYTEORDER != 0x4321
a687059c 1999short
864dbfa3 2000Perl_my_swap(pTHX_ short s)
a687059c
LW		 2001{
2002#if (BYTEORDER & 1) == 0
2003 short result;
2004
2005 result = ((s & 255) << 8) + ((s >> 8) & 255);
2006 return result;
2007#else
2008 return s;
2009#endif
2010}
2011
2012long
864dbfa3 2013Perl_my_htonl(pTHX_ long l)
a687059c
LW		 2014{
2015 union {
2016 long result;
ffed7fef 2017 char c[sizeof(long)];
a687059c
LW		 2018 } u;
2019
ffed7fef 2020#if BYTEORDER == 0x1234
a687059c
LW		 2021 u.c[0] = (l >> 24) & 255;
2022 u.c[1] = (l >> 16) & 255;
2023 u.c[2] = (l >> 8) & 255;
2024 u.c[3] = l & 255;
2025 return u.result;
2026#else
ffed7fef 2027#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2028 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2029#else
79072805
LW		 2030 register I32 o;
2031 register I32 s;
a687059c 2032
ffed7fef
LW		 2033 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2034 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 2035 }
2036 return u.result;
2037#endif
2038#endif
2039}
2040
2041long
864dbfa3 2042Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 2043{
2044 union {
2045 long l;
ffed7fef 2046 char c[sizeof(long)];
a687059c
LW		 2047 } u;
2048
ffed7fef 2049#if BYTEORDER == 0x1234
a687059c
LW		 2050 u.c[0] = (l >> 24) & 255;
2051 u.c[1] = (l >> 16) & 255;
2052 u.c[2] = (l >> 8) & 255;
2053 u.c[3] = l & 255;
2054 return u.l;
2055#else
ffed7fef 2056#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2057 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2058#else
79072805
LW		 2059 register I32 o;
2060 register I32 s;
a687059c
LW		 2061
2062 u.l = l;
2063 l = 0;
ffed7fef
LW		 2064 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2065 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 2066 }
2067 return l;
2068#endif
2069#endif
2070}
2071
ffed7fef 2072#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 2073#endif /* MYSWAP */
2074
2075/*
2076 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2077 * If these functions are defined,
2078 * the BYTEORDER is neither 0x1234 nor 0x4321.
2079 * However, this is not assumed.
2080 * -DWS
2081 */
2082
2083#define HTOV(name,type) \
2084 type \
ba106d47 2085 name (register type n) \
988174c1
LW		 2086 { \
2087 union { \
2088 type value; \
2089 char c[sizeof(type)]; \
2090 } u; \
79072805
LW		 2091 register I32 i; \
2092 register I32 s; \
988174c1
LW		 2093 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2094 u.c[i] = (n >> s) & 0xFF; \
2095 } \
2096 return u.value; \
2097 }
2098
2099#define VTOH(name,type) \
2100 type \
ba106d47 2101 name (register type n) \
988174c1
LW		 2102 { \
2103 union { \
2104 type value; \
2105 char c[sizeof(type)]; \
2106 } u; \
79072805
LW		 2107 register I32 i; \
2108 register I32 s; \
988174c1
LW		 2109 u.value = n; \
2110 n = 0; \
2111 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2112 n += (u.c[i] & 0xFF) << s; \
2113 } \
2114 return n; \
2115 }
2116
2117#if defined(HAS_HTOVS) && !defined(htovs)
2118HTOV(htovs,short)
2119#endif
2120#if defined(HAS_HTOVL) && !defined(htovl)
2121HTOV(htovl,long)
2122#endif
2123#if defined(HAS_VTOHS) && !defined(vtohs)
2124VTOH(vtohs,short)
2125#endif
2126#if defined(HAS_VTOHL) && !defined(vtohl)
2127VTOH(vtohl,long)
2128#endif
a687059c 2129
5f05dabc 2130 /* VMS' my_popen() is in VMS.c, same with OS/2. */
092bebab 2131#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
760ac839 2132PerlIO *
864dbfa3 2133Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2134{
2135 int p[2];
8ac85365 2136 register I32 This, that;
79072805
LW		 2137 register I32 pid;
2138 SV *sv;
1738f5c4 2139 I32 doexec = strNE(cmd,"-");
e446cec8
IZ		 2140 I32 did_pipes = 0;
2141 int pp[2];
a687059c 2142
45bc9206 2143 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2144#ifdef OS2
2145 if (doexec) {
2146 return my_syspopen(cmd,mode);
2147 }
2148#endif
8ac85365
NIS		 2149 This = (*mode == 'w');
2150 that = !This;
3280af22 2151 if (doexec && PL_tainting) {
bbce6d69 2152 taint_env();
2153 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2154 }
c2267164
IZ		 2155 if (PerlProc_pipe(p) < 0)
2156 return Nullfp;
e446cec8
IZ		 2157 if (doexec && PerlProc_pipe(pp) >= 0)
2158 did_pipes = 1;
a687059c
LW		 2159 while ((pid = (doexec?vfork():fork())) < 0) {
2160 if (errno != EAGAIN) {
6ad3d225 2161 PerlLIO_close(p[This]);
e446cec8
IZ		 2162 if (did_pipes) {
2163 PerlLIO_close(pp[0]);
2164 PerlLIO_close(pp[1]);
2165 }
a687059c 2166 if (!doexec)
cea2e8a9 2167 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 2168 return Nullfp;
2169 }
2170 sleep(5);
2171 }
2172 if (pid == 0) {
79072805
LW		 2173 GV* tmpgv;
2174
30ac6d9b
GS		 2175#undef THIS
2176#undef THAT
a687059c 2177#define THIS that
8ac85365 2178#define THAT This
6ad3d225 2179 PerlLIO_close(p[THAT]);
e446cec8
IZ		 2180 if (did_pipes) {
2181 PerlLIO_close(pp[0]);
2182#if defined(HAS_FCNTL) && defined(F_SETFD)
2183 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2184#endif
2185 }
a687059c 2186 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2187 PerlLIO_dup2(p[THIS], *mode == 'r');
2188 PerlLIO_close(p[THIS]);
a687059c 2189 }
4435c477 2190#ifndef OS2
a687059c 2191 if (doexec) {
a0d0e21e 2192#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2193 int fd;
2194
2195#ifndef NOFILE
2196#define NOFILE 20
2197#endif
6b88bc9c 2198 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
e446cec8
IZ		 2199 if (fd != pp[1])
2200 PerlLIO_close(fd);
ae986130 2201#endif
e446cec8 2202 do_exec3(cmd,pp[1],did_pipes); /* may or may not use the shell */
6ad3d225 2203 PerlProc__exit(1);
a687059c 2204 }
4435c477 2205#endif /* defined OS2 */
de3bb511 2206 /*SUPPRESS 560*/
85e6fe83 2207 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
1e422769 2208 sv_setiv(GvSV(tmpgv), (IV)getpid());
3280af22
NIS		 2209 PL_forkprocess = 0;
2210 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2211 return Nullfp;
2212#undef THIS
2213#undef THAT
2214 }
62b28dd9 2215 do_execfree(); /* free any memory malloced by child on vfork */
6ad3d225 2216 PerlLIO_close(p[that]);
e446cec8
IZ		 2217 if (did_pipes)
2218 PerlLIO_close(pp[1]);
8ac85365 2219 if (p[that] < p[This]) {
6ad3d225
GS		 2220 PerlLIO_dup2(p[This], p[that]);
2221 PerlLIO_close(p[This]);
8ac85365 2222 p[This] = p[that];
62b28dd9 2223 }
3280af22 2224 sv = *av_fetch(PL_fdpid,p[This],TRUE);
a0d0e21e 2225 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2226 SvIVX(sv) = pid;
3280af22 2227 PL_forkprocess = pid;
e446cec8
IZ		 2228 if (did_pipes && pid > 0) {
2229 int errkid;
2230 int n = 0, n1;
2231
2232 while (n < sizeof(int)) {
2233 n1 = PerlLIO_read(pp[0],
2234 (void*)(((char*)&errkid)+n),
2235 (sizeof(int)) - n);
2236 if (n1 <= 0)
2237 break;
2238 n += n1;
2239 }
2240 if (n) { /* Error */
2241 if (n != sizeof(int))
cea2e8a9 2242 Perl_croak(aTHX_ "panic: kid popen errno read");
e446cec8
IZ		 2243 PerlLIO_close(pp[0]);
2244 errno = errkid; /* Propagate errno from kid */
2245 return Nullfp;
2246 }
2247 }
2248 if (did_pipes)
2249 PerlLIO_close(pp[0]);
8ac85365 2250 return PerlIO_fdopen(p[This], mode);
a687059c 2251}
7c0587c8 2252#else
55497cff 2253#if defined(atarist) || defined(DJGPP)
7c0587c8 2254FILE *popen();
760ac839 2255PerlIO *
864dbfa3 2256Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2257{
760ac839 2258 /* Needs work for PerlIO ! */
55497cff 2259 /* used 0 for 2nd parameter to PerlIO-exportFILE; apparently not used */
45bc9206 2260 PERL_FLUSHALL_FOR_CHILD;
55497cff 2261 return popen(PerlIO_exportFILE(cmd, 0), mode);
7c0587c8
LW		 2262}
2263#endif
2264
2265#endif /* !DOSISH */
a687059c 2266
748a9306 2267#ifdef DUMP_FDS
35ff7856 2268void
864dbfa3 2269Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2270{
2271 int fd;
2272 struct stat tmpstatbuf;
2273
760ac839 2274 PerlIO_printf(PerlIO_stderr(),"%s", s);
ae986130 2275 for (fd = 0; fd < 32; fd++) {
6ad3d225 2276 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
760ac839 2277 PerlIO_printf(PerlIO_stderr()," %d",fd);
ae986130 2278 }
760ac839 2279 PerlIO_printf(PerlIO_stderr(),"\n");
ae986130 2280}
35ff7856 2281#endif /* DUMP_FDS */
ae986130 2282
fe14fcc3 2283#ifndef HAS_DUP2
fec02dd3 2284int
ba106d47 2285dup2(int oldfd, int newfd)
a687059c 2286{
a0d0e21e 2287#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2288 if (oldfd == newfd)
2289 return oldfd;
6ad3d225 2290 PerlLIO_close(newfd);
fec02dd3 2291 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2292#else
fc36a67e 2293#define DUP2_MAX_FDS 256
2294 int fdtmp[DUP2_MAX_FDS];
79072805 2295 I32 fdx = 0;
ae986130
LW		 2296 int fd;
2297
fe14fcc3 2298 if (oldfd == newfd)
fec02dd3 2299 return oldfd;
6ad3d225 2300 PerlLIO_close(newfd);
fc36a67e 2301 /* good enough for low fd's... */
6ad3d225 2302 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2303 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2304 PerlLIO_close(fd);
fc36a67e 2305 fd = -1;
2306 break;
2307 }
ae986130 2308 fdtmp[fdx++] = fd;
fc36a67e 2309 }
ae986130 2310 while (fdx > 0)
6ad3d225 2311 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2312 return fd;
62b28dd9 2313#endif
a687059c
LW		 2314}
2315#endif
2316
ff68c719 2317
2318#ifdef HAS_SIGACTION
2319
2320Sighandler_t
864dbfa3 2321Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2322{
2323 struct sigaction act, oact;
2324
2325 act.sa_handler = handler;
2326 sigemptyset(&act.sa_mask);
2327 act.sa_flags = 0;
2328#ifdef SA_RESTART
2329 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2330#endif
85264bed
CS		 2331#ifdef SA_NOCLDWAIT
2332 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2333 act.sa_flags |= SA_NOCLDWAIT;
2334#endif
ff68c719 2335 if (sigaction(signo, &act, &oact) == -1)
36477c24 2336 return SIG_ERR;
ff68c719 2337 else
36477c24 2338 return oact.sa_handler;
ff68c719 2339}
2340
2341Sighandler_t
864dbfa3 2342Perl_rsignal_state(pTHX_ int signo)
ff68c719 2343{
2344 struct sigaction oact;
2345
2346 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2347 return SIG_ERR;
2348 else
2349 return oact.sa_handler;
2350}
2351
2352int
864dbfa3 2353Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2354{
2355 struct sigaction act;
2356
2357 act.sa_handler = handler;
2358 sigemptyset(&act.sa_mask);
2359 act.sa_flags = 0;
2360#ifdef SA_RESTART
2361 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2362#endif
85264bed
CS		 2363#ifdef SA_NOCLDWAIT
2364 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2365 act.sa_flags |= SA_NOCLDWAIT;
2366#endif
ff68c719 2367 return sigaction(signo, &act, save);
2368}
2369
2370int
864dbfa3 2371Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2372{
2373 return sigaction(signo, save, (struct sigaction *)NULL);
2374}
2375
2376#else /* !HAS_SIGACTION */
2377
2378Sighandler_t
864dbfa3 2379Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2380{
6ad3d225 2381 return PerlProc_signal(signo, handler);
ff68c719 2382}
2383
2384static int sig_trapped;
2385
2386static
2387Signal_t
4e35701f 2388sig_trap(int signo)
ff68c719 2389{
2390 sig_trapped++;
2391}
2392
2393Sighandler_t
864dbfa3 2394Perl_rsignal_state(pTHX_ int signo)
ff68c719 2395{
2396 Sighandler_t oldsig;
2397
2398 sig_trapped = 0;
6ad3d225
GS		 2399 oldsig = PerlProc_signal(signo, sig_trap);
2400 PerlProc_signal(signo, oldsig);
ff68c719 2401 if (sig_trapped)
6ad3d225 2402 PerlProc_kill(getpid(), signo);
ff68c719 2403 return oldsig;
2404}
2405
2406int
864dbfa3 2407Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2408{
6ad3d225 2409 *save = PerlProc_signal(signo, handler);
ff68c719 2410 return (*save == SIG_ERR) ? -1 : 0;
2411}
2412
2413int
864dbfa3 2414Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2415{
6ad3d225 2416 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2417}
2418
2419#endif /* !HAS_SIGACTION */
2420
5f05dabc 2421 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
092bebab 2422#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM)
79072805 2423I32
864dbfa3 2424Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2425{
ff68c719 2426 Sigsave_t hstat, istat, qstat;
a687059c 2427 int status;
a0d0e21e 2428 SV **svp;
20188a90 2429 int pid;
1d3434b8 2430 int pid2;
03136e13
CS		 2431 bool close_failed;
2432 int saved_errno;
2433#ifdef VMS
2434 int saved_vaxc_errno;
2435#endif
22fae026
TM		 2436#ifdef WIN32
2437 int saved_win32_errno;
2438#endif
a687059c 2439
3280af22 2440 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
748a9306 2441 pid = (int)SvIVX(*svp);
a0d0e21e 2442 SvREFCNT_dec(*svp);
3280af22 2443 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2444#ifdef OS2
2445 if (pid == -1) { /* Opened by popen. */
2446 return my_syspclose(ptr);
2447 }
2448#endif
03136e13
CS		 2449 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2450 saved_errno = errno;
2451#ifdef VMS
2452 saved_vaxc_errno = vaxc$errno;
2453#endif
22fae026
TM		 2454#ifdef WIN32
2455 saved_win32_errno = GetLastError();
2456#endif
03136e13 2457 }
7c0587c8 2458#ifdef UTS
6ad3d225 2459 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2460#endif
ff68c719 2461 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2462 rsignal_save(SIGINT, SIG_IGN, &istat);
2463 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
748a9306 2464 do {
1d3434b8
GS		 2465 pid2 = wait4pid(pid, &status, 0);
2466 } while (pid2 == -1 && errno == EINTR);
ff68c719 2467 rsignal_restore(SIGHUP, &hstat);
2468 rsignal_restore(SIGINT, &istat);
2469 rsignal_restore(SIGQUIT, &qstat);
03136e13
CS		 2470 if (close_failed) {
2471 SETERRNO(saved_errno, saved_vaxc_errno);
2472 return -1;
2473 }
1d3434b8 2474 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2475}
4633a7c4
LW		 2476#endif /* !DOSISH */
2477
8736538c 2478#if !defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(CYGWIN32)
79072805 2479I32
864dbfa3 2480Perl_wait4pid(pTHX_ int pid, int *statusp, int flags)
20188a90 2481{
79072805
LW		 2482 SV *sv;
2483 SV** svp;
fc36a67e 2484 char spid[TYPE_CHARS(int)];
20188a90
LW		 2485
2486 if (!pid)
2487 return -1;
20188a90
LW		 2488 if (pid > 0) {
2489 sprintf(spid, "%d", pid);
3280af22
NIS		 2490 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2491 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2492 *statusp = SvIVX(*svp);
3280af22 2493 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2494 return pid;
2495 }
2496 }
2497 else {
79072805 2498 HE *entry;
20188a90 2499
3280af22
NIS		 2500 hv_iterinit(PL_pidstatus);
2501 if (entry = hv_iternext(PL_pidstatus)) {
a0d0e21e 2502 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2503 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2504 *statusp = SvIVX(sv);
20188a90 2505 sprintf(spid, "%d", pid);
3280af22 2506 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2507 return pid;
2508 }
2509 }
79072805 2510#ifdef HAS_WAITPID
367f3c24
IZ		 2511# ifdef HAS_WAITPID_RUNTIME
2512 if (!HAS_WAITPID_RUNTIME)
2513 goto hard_way;
2514# endif
f55ee38a 2515 return PerlProc_waitpid(pid,statusp,flags);
367f3c24
IZ		 2516#endif
2517#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
a0d0e21e 2518 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
367f3c24
IZ		 2519#endif
2520#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2521 hard_way:
a0d0e21e
LW		 2522 {
2523 I32 result;
2524 if (flags)
cea2e8a9 2525 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2526 else {
76e3520e 2527 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2528 pidgone(result,*statusp);
2529 if (result < 0)
2530 *statusp = -1;
2531 }
2532 return result;
a687059c
LW		 2533 }
2534#endif
a687059c 2535}
2d7a9237 2536#endif /* !DOSISH || OS2 || WIN32 */
a687059c 2537
7c0587c8 2538void
de3bb511 2539/*SUPPRESS 590*/
864dbfa3 2540Perl_pidgone(pTHX_ int pid, int status)
a687059c 2541{
79072805 2542 register SV *sv;
fc36a67e 2543 char spid[TYPE_CHARS(int)];
a687059c 2544
20188a90 2545 sprintf(spid, "%d", pid);
3280af22 2546 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2547 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2548 SvIVX(sv) = status;
20188a90 2549 return;
a687059c
LW		 2550}
2551
55497cff 2552#if defined(atarist) || defined(OS2) || defined(DJGPP)
7c0587c8 2553int pclose();
ddcf38b7
IZ		 2554#ifdef HAS_FORK
2555int /* Cannot prototype with I32
2556 in os2ish.h. */
ba106d47 2557my_syspclose(PerlIO *ptr)
ddcf38b7 2558#else
79072805 2559I32
864dbfa3 2560Perl_my_pclose(pTHX_ PerlIO *ptr)
ddcf38b7 2561#endif
a687059c 2562{
760ac839
LW		 2563 /* Needs work for PerlIO ! */
2564 FILE *f = PerlIO_findFILE(ptr);
2565 I32 result = pclose(f);
2566 PerlIO_releaseFILE(ptr,f);
2567 return result;
a687059c 2568}
7c0587c8 2569#endif
9f68db38
LW		 2570
2571void
864dbfa3 2572Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2573{
79072805 2574 register I32 todo;
08105a92 2575 register const char *frombase = from;
9f68db38
LW		 2576
2577 if (len == 1) {
08105a92 2578 register const char c = *from;
9f68db38 2579 while (count-- > 0)
5926133d 2580 *to++ = c;
9f68db38
LW		 2581 return;
2582 }
2583 while (count-- > 0) {
2584 for (todo = len; todo > 0; todo--) {
2585 *to++ = *from++;
2586 }
2587 from = frombase;
2588 }
2589}
0f85fab0 2590
463ee0b2 2591U32
864dbfa3 2592Perl_cast_ulong(pTHX_ double f)
0f85fab0
LW		 2593{
2594 long along;
2595
27e2fb84 2596#if CASTFLAGS & 2
34de22dd
LW		 2597# define BIGDOUBLE 2147483648.0
2598 if (f >= BIGDOUBLE)
2599 return (unsigned long)(f-(long)(f/BIGDOUBLE)*BIGDOUBLE)|0x80000000;
2600#endif
0f85fab0
LW		 2601 if (f >= 0.0)
2602 return (unsigned long)f;
2603 along = (long)f;
2604 return (unsigned long)along;
2605}
ed6116ce 2606# undef BIGDOUBLE
5d94fbed 2607
5d94fbed
AD		 2608/* Unfortunately, on some systems the cast_uv() function doesn't
2609 work with the system-supplied definition of ULONG_MAX. The
2610 comparison (f >= ULONG_MAX) always comes out true. It must be a
2611 problem with the compiler constant folding.
2612
2613 In any case, this workaround should be fine on any two's complement
2614 system. If it's not, supply a '-DMY_ULONG_MAX=whatever' in your
2615 ccflags.
2616 --Andy Dougherty <doughera@lafcol.lafayette.edu>
2617*/
1eb770ff 2618
2619/* Code modified to prefer proper named type ranges, I32, IV, or UV, instead
2620 of LONG_(MIN/MAX).
2621 -- Kenneth Albanowski <kjahds@kjahds.com>
2622*/
2623
20cec16a 2624#ifndef MY_UV_MAX
2625# define MY_UV_MAX ((UV)IV_MAX * (UV)2 + (UV)1)
5d94fbed
AD		 2626#endif
2627
ed6116ce 2628I32
864dbfa3 2629Perl_cast_i32(pTHX_ double f)
ed6116ce 2630{
20cec16a 2631 if (f >= I32_MAX)
2632 return (I32) I32_MAX;
2633 if (f <= I32_MIN)
2634 return (I32) I32_MIN;
ed6116ce
LW		 2635 return (I32) f;
2636}
a0d0e21e
LW		 2637
2638IV
864dbfa3 2639Perl_cast_iv(pTHX_ double f)
a0d0e21e 2640{
25da4f38
IZ		 2641 if (f >= IV_MAX) {
2642 UV uv;
2643
2644 if (f >= (double)UV_MAX)
2645 return (IV) UV_MAX;
2646 uv = (UV) f;
2647 return (IV)uv;
2648 }
20cec16a 2649 if (f <= IV_MIN)
2650 return (IV) IV_MIN;
a0d0e21e
LW		 2651 return (IV) f;
2652}
5d94fbed
AD		 2653
2654UV
864dbfa3 2655Perl_cast_uv(pTHX_ double f)
5d94fbed 2656{
20cec16a 2657 if (f >= MY_UV_MAX)
2658 return (UV) MY_UV_MAX;
25da4f38
IZ		 2659 if (f < 0) {
2660 IV iv;
2661
2662 if (f < IV_MIN)
2663 return (UV)IV_MIN;
2664 iv = (IV) f;
2665 return (UV) iv;
2666 }
5d94fbed
AD		 2667 return (UV) f;
2668}
2669
fe14fcc3 2670#ifndef HAS_RENAME
79072805 2671I32
864dbfa3 2672Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 2673{
93a17b20
LW		 2674 char *fa = strrchr(a,'/');
2675 char *fb = strrchr(b,'/');
62b28dd9
LW		 2676 struct stat tmpstatbuf1;
2677 struct stat tmpstatbuf2;
46fc3d4c 2678 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 2679
2680 if (fa)
2681 fa++;
2682 else
2683 fa = a;
2684 if (fb)
2685 fb++;
2686 else
2687 fb = b;
2688 if (strNE(a,b))
2689 return FALSE;
2690 if (fa == a)
46fc3d4c 2691 sv_setpv(tmpsv, ".");
62b28dd9 2692 else
46fc3d4c 2693 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 2694 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 2695 return FALSE;
2696 if (fb == b)
46fc3d4c 2697 sv_setpv(tmpsv, ".");
62b28dd9 2698 else
46fc3d4c 2699 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 2700 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 2701 return FALSE;
2702 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2703 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2704}
fe14fcc3
LW		 2705#endif /* !HAS_RENAME */
2706
55497cff 2707UV
864dbfa3 2708Perl_scan_bin(pTHX_ char *start, I32 len, I32 *retlen)
4f19785b
WSI		 2709{
2710 register char *s = start;
2711 register UV retval = 0;
2712 bool overflowed = FALSE;
2713 while (len && *s >= '0' && *s <= '1') {
2714 register UV n = retval << 1;
2715 if (!overflowed && (n >> 1) != retval) {
cea2e8a9 2716 Perl_warn(aTHX_ "Integer overflow in binary number");
4f19785b
WSI		 2717 overflowed = TRUE;
2718 }
2719 retval = n | (*s++ - '0');
2720 len--;
2721 }
6529e8bd 2722 if (len && (*s >= '2' && *s <= '9')) {
4f19785b
WSI		 2723 dTHR;
2724 if (ckWARN(WARN_UNSAFE))
cea2e8a9 2725 Perl_warner(aTHX_ WARN_UNSAFE, "Illegal binary digit '%c' ignored", *s);
4f19785b
WSI		 2726 }
2727 *retlen = s - start;
2728 return retval;
2729}
2730UV
864dbfa3 2731Perl_scan_oct(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2732{
2733 register char *s = start;
55497cff 2734 register UV retval = 0;
2735 bool overflowed = FALSE;
fe14fcc3 2736
748a9306 2737 while (len && *s >= '0' && *s <= '7') {
55497cff 2738 register UV n = retval << 3;
2739 if (!overflowed && (n >> 3) != retval) {
cea2e8a9 2740 Perl_warn(aTHX_ "Integer overflow in octal number");
55497cff 2741 overflowed = TRUE;
2742 }
2743 retval = n | (*s++ - '0');
748a9306 2744 len--;
fe14fcc3 2745 }
d008e5eb
GS		 2746 if (len && (*s == '8' || *s == '9')) {
2747 dTHR;
2748 if (ckWARN(WARN_OCTAL))
cea2e8a9 2749 Perl_warner(aTHX_ WARN_OCTAL, "Illegal octal digit '%c' ignored", *s);
d008e5eb 2750 }
fe14fcc3
LW		 2751 *retlen = s - start;
2752 return retval;
2753}
2754
71be2cbc 2755UV
864dbfa3 2756Perl_scan_hex(pTHX_ char *start, I32 len, I32 *retlen)
fe14fcc3
LW		 2757{
2758 register char *s = start;
55497cff 2759 register UV retval = 0;
2760 bool overflowed = FALSE;
6ff81951 2761 char *tmp = s;
a0ed51b3 2762 register UV n;
fe14fcc3 2763
a0ed51b3
LW		 2764 while (len-- && *s) {
2765 tmp = strchr((char *) PL_hexdigit, *s++);
2766 if (!tmp) {
e3fdf988 2767 if (*(s-1) == '_' || (*(s-1) == 'x' && retval == 0))
a0ed51b3
LW		 2768 continue;
2769 else {
d008e5eb 2770 dTHR;
a0ed51b3 2771 --s;
599cee73 2772 if (ckWARN(WARN_UNSAFE))
cea2e8a9 2773 Perl_warner(aTHX_ WARN_UNSAFE,"Illegal hex digit '%c' ignored", *s);
a0ed51b3
LW		 2774 break;
2775 }
2776 }
2777 n = retval << 4;
55497cff 2778 if (!overflowed && (n >> 4) != retval) {
cea2e8a9 2779 Perl_warn(aTHX_ "Integer overflow in hex number");
55497cff 2780 overflowed = TRUE;
2781 }
3280af22 2782 retval = n | ((tmp - PL_hexdigit) & 15);
6ff81951 2783 }
fe14fcc3
LW		 2784 *retlen = s - start;
2785 return retval;
2786}
760ac839 2787
491527d0 2788char*
864dbfa3 2789Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0
GS		 2790{
2791 dTHR;
2792 char *xfound = Nullch;
2793 char *xfailed = Nullch;
0f31cffe 2794 char tmpbuf[MAXPATHLEN];
491527d0
GS		 2795 register char *s;
2796 I32 len;
2797 int retval;
2798#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2799# define SEARCH_EXTS ".bat", ".cmd", NULL
2800# define MAX_EXT_LEN 4
2801#endif
2802#ifdef OS2
2803# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2804# define MAX_EXT_LEN 4
2805#endif
2806#ifdef VMS
2807# define SEARCH_EXTS ".pl", ".com", NULL
2808# define MAX_EXT_LEN 4
2809#endif
2810 /* additional extensions to try in each dir if scriptname not found */
2811#ifdef SEARCH_EXTS
2812 char *exts[] = { SEARCH_EXTS };
2813 char **ext = search_ext ? search_ext : exts;
2814 int extidx = 0, i = 0;
2815 char *curext = Nullch;
2816#else
2817# define MAX_EXT_LEN 0
2818#endif
2819
2820 /*
2821 * If dosearch is true and if scriptname does not contain path
2822 * delimiters, search the PATH for scriptname.
2823 *
2824 * If SEARCH_EXTS is also defined, will look for each
2825 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2826 * while searching the PATH.
2827 *
2828 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2829 * proceeds as follows:
2830 * If DOSISH or VMSISH:
2831 * + look for ./scriptname{,.foo,.bar}
2832 * + search the PATH for scriptname{,.foo,.bar}
2833 *
2834 * If !DOSISH:
2835 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2836 * this will not look in '.' if it's not in the PATH)
2837 */
84486fc6 2838 tmpbuf[0] = '\0';
491527d0
GS		 2839
2840#ifdef VMS
2841# ifdef ALWAYS_DEFTYPES
2842 len = strlen(scriptname);
2843 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2844 int hasdir, idx = 0, deftypes = 1;
2845 bool seen_dot = 1;
2846
2847 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2848# else
2849 if (dosearch) {
2850 int hasdir, idx = 0, deftypes = 1;
2851 bool seen_dot = 1;
2852
2853 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2854# endif
2855 /* The first time through, just add SEARCH_EXTS to whatever we
2856 * already have, so we can check for default file types. */
2857 while (deftypes ||
84486fc6 2858 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 2859 {
2860 if (deftypes) {
2861 deftypes = 0;
84486fc6 2862 *tmpbuf = '\0';
491527d0 2863 }
84486fc6
GS		 2864 if ((strlen(tmpbuf) + strlen(scriptname)
2865 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2866 continue; /* don't search dir with too-long name */
84486fc6 2867 strcat(tmpbuf, scriptname);
491527d0
GS		 2868#else /* !VMS */
2869
2870#ifdef DOSISH
2871 if (strEQ(scriptname, "-"))
2872 dosearch = 0;
2873 if (dosearch) { /* Look in '.' first. */
2874 char *cur = scriptname;
2875#ifdef SEARCH_EXTS
2876 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2877 while (ext[i])
2878 if (strEQ(ext[i++],curext)) {
2879 extidx = -1; /* already has an ext */
2880 break;
2881 }
2882 do {
2883#endif
2884 DEBUG_p(PerlIO_printf(Perl_debug_log,
2885 "Looking for %s\n",cur));
017f25f1
IZ		 2886 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2887 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 2888 dosearch = 0;
2889 scriptname = cur;
2890#ifdef SEARCH_EXTS
2891 break;
2892#endif
2893 }
2894#ifdef SEARCH_EXTS
2895 if (cur == scriptname) {
2896 len = strlen(scriptname);
84486fc6 2897 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2898 break;
84486fc6 2899 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 2900 }
2901 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2902 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 2903#endif
2904 }
2905#endif
2906
2907 if (dosearch && !strchr(scriptname, '/')
2908#ifdef DOSISH
2909 && !strchr(scriptname, '\\')
2910#endif
2911 && (s = PerlEnv_getenv("PATH"))) {
2912 bool seen_dot = 0;
2913
3280af22
NIS		 2914 PL_bufend = s + strlen(s);
2915 while (s < PL_bufend) {
491527d0
GS		 2916#if defined(atarist) || defined(DOSISH)
2917 for (len = 0; *s
2918# ifdef atarist
2919 && *s != ','
2920# endif
2921 && *s != ';'; len++, s++) {
84486fc6
GS		 2922 if (len < sizeof tmpbuf)
2923 tmpbuf[len] = *s;
491527d0 2924 }
84486fc6
GS		 2925 if (len < sizeof tmpbuf)
2926 tmpbuf[len] = '\0';
491527d0 2927#else /* ! (atarist || DOSISH) */
3280af22 2928 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 2929 ':',
2930 &len);
2931#endif /* ! (atarist || DOSISH) */
3280af22 2932 if (s < PL_bufend)
491527d0 2933 s++;
84486fc6 2934 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS		 2935 continue; /* don't search dir with too-long name */
2936 if (len
61ae2fbf 2937#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 2938 && tmpbuf[len - 1] != '/'
2939 && tmpbuf[len - 1] != '\\'
491527d0
GS		 2940#endif
2941 )
84486fc6
GS		 2942 tmpbuf[len++] = '/';
2943 if (len == 2 && tmpbuf[0] == '.')
491527d0 2944 seen_dot = 1;
84486fc6 2945 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 2946#endif /* !VMS */
2947
2948#ifdef SEARCH_EXTS
84486fc6 2949 len = strlen(tmpbuf);
491527d0
GS		 2950 if (extidx > 0) /* reset after previous loop */
2951 extidx = 0;
2952 do {
2953#endif
84486fc6 2954 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2955 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 2956 if (S_ISDIR(PL_statbuf.st_mode)) {
2957 retval = -1;
2958 }
491527d0
GS		 2959#ifdef SEARCH_EXTS
2960 } while ( retval < 0 /* not there */
2961 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2962 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 2963 );
2964#endif
2965 if (retval < 0)
2966 continue;
3280af22
NIS		 2967 if (S_ISREG(PL_statbuf.st_mode)
2968 && cando(S_IRUSR,TRUE,&PL_statbuf)
491527d0 2969#ifndef DOSISH
3280af22 2970 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 2971#endif
2972 )
2973 {
84486fc6 2974 xfound = tmpbuf; /* bingo! */
491527d0
GS		 2975 break;
2976 }
2977 if (!xfailed)
84486fc6 2978 xfailed = savepv(tmpbuf);
491527d0
GS		 2979 }
2980#ifndef DOSISH
017f25f1
IZ		 2981 if (!xfound && !seen_dot && !xfailed &&
2982 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
2983 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 2984#endif
2985 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 2986 if (!xfound) {
2987 if (flags & 1) { /* do or die? */
cea2e8a9 2988 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 2989 (xfailed ? "execute" : "find"),
2990 (xfailed ? xfailed : scriptname),
2991 (xfailed ? "" : " on PATH"),
2992 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2993 }
2994 scriptname = Nullch;
2995 }
491527d0
GS		 2996 if (xfailed)
2997 Safefree(xfailed);
2998 scriptname = xfound;
2999 }
9ccb31f9 3000 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 3001}
3002
3003
11343788 3004#ifdef USE_THREADS
12ca11f6
MB		 3005#ifdef FAKE_THREADS
3006/* Very simplistic scheduler for now */
3007void
3008schedule(void)
3009{
c7848ba1 3010 thr = thr->i.next_run;
12ca11f6
MB		 3011}
3012
3013void
864dbfa3 3014Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB		 3015{
3016 *cp = 0;
3017}
3018
3019void
864dbfa3 3020Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 3021{
51dd5992 3022 perl_os_thread t;
12ca11f6
MB		 3023 perl_cond cond = *cp;
3024
3025 if (!cond)
3026 return;
3027 t = cond->thread;
3028 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3029 t->i.next_run = thr->i.next_run;
3030 thr->i.next_run->i.prev_run = t;
3031 t->i.prev_run = thr;
3032 thr->i.next_run = t;
3033 thr->i.wait_queue = 0;
12ca11f6
MB		 3034 /* Remove from the wait queue */
3035 *cp = cond->next;
3036 Safefree(cond);
3037}
3038
3039void
864dbfa3 3040Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 3041{
51dd5992 3042 perl_os_thread t;
12ca11f6
MB		 3043 perl_cond cond, cond_next;
3044
3045 for (cond = *cp; cond; cond = cond_next) {
3046 t = cond->thread;
3047 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3048 t->i.next_run = thr->i.next_run;
3049 thr->i.next_run->i.prev_run = t;
3050 t->i.prev_run = thr;
3051 thr->i.next_run = t;
3052 thr->i.wait_queue = 0;
12ca11f6
MB		 3053 /* Remove from the wait queue */
3054 cond_next = cond->next;
3055 Safefree(cond);
3056 }
3057 *cp = 0;
3058}
3059
3060void
864dbfa3 3061Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB		 3062{
3063 perl_cond cond;
3064
c7848ba1 3065 if (thr->i.next_run == thr)
cea2e8a9 3066 Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
12ca11f6 3067
0f15f207 3068 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB		 3069 cond->thread = thr;
3070 cond->next = *cp;
3071 *cp = cond;
c7848ba1 3072 thr->i.wait_queue = cond;
12ca11f6 3073 /* Remove ourselves from runnable queue */
c7848ba1
MB		 3074 thr->i.next_run->i.prev_run = thr->i.prev_run;
3075 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB		 3076}
3077#endif /* FAKE_THREADS */
3078
0d85d877 3079#ifdef PTHREAD_GETSPECIFIC_INT
52e1cb5e 3080struct perl_thread *
864dbfa3 3081Perl_getTHR(pTHX)
11343788
MB		 3082{
3083 pthread_addr_t t;
3084
6b88bc9c 3085 if (pthread_getspecific(PL_thr_key, &t))
cea2e8a9 3086 Perl_croak(aTHX_ "panic: pthread_getspecific");
52e1cb5e 3087 return (struct perl_thread *) t;
11343788 3088}
0d85d877 3089#endif
f93b4edd
MB		 3090
3091MAGIC *
864dbfa3 3092Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB		 3093{
3094 MAGIC *mg;
3095
3096 SvUPGRADE(sv, SVt_PVMG);
3097 mg = mg_find(sv, 'm');
3098 if (!mg) {
3099 condpair_t *cp;
3100
3101 New(53, cp, 1, condpair_t);
3102 MUTEX_INIT(&cp->mutex);
3103 COND_INIT(&cp->owner_cond);
3104 COND_INIT(&cp->cond);
3105 cp->owner = 0;
28a8573f 3106 MUTEX_LOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3107 mg = mg_find(sv, 'm');
3108 if (mg) {
3109 /* someone else beat us to initialising it */
28a8573f 3110 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
f93b4edd
MB		 3111 MUTEX_DESTROY(&cp->mutex);
3112 COND_DESTROY(&cp->owner_cond);
3113 COND_DESTROY(&cp->cond);
3114 Safefree(cp);
3115 }
3116 else {
3117 sv_magic(sv, Nullsv, 'm', 0, 0);
3118 mg = SvMAGIC(sv);
3119 mg->mg_ptr = (char *)cp;
565764a8 3120 mg->mg_len = sizeof(cp);
28a8573f 3121 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX need separate mutex? */
8b73bbec 3122 DEBUG_S(WITH_THR(PerlIO_printf(PerlIO_stderr(),
c7848ba1 3123 "%p: condpair_magic %p\n", thr, sv));)
f93b4edd
MB		 3124 }
3125 }
3126 return mg;
3127}
a863c7d1
MB		 3128
3129/*
199100c8
MB		 3130 * Make a new perl thread structure using t as a prototype. Some of the
3131 * fields for the new thread are copied from the prototype thread, t,
3132 * so t should not be running in perl at the time this function is
3133 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
3134 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 3135 */
52e1cb5e 3136struct perl_thread *
864dbfa3 3137Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 3138{
cea2e8a9 3139#ifndef PERL_IMPLICIT_CONTEXT
52e1cb5e 3140 struct perl_thread *thr;
cea2e8a9 3141#endif
a863c7d1 3142 SV *sv;
199100c8
MB		 3143 SV **svp;
3144 I32 i;
3145
79cb57f6 3146 sv = newSVpvn("", 0);
52e1cb5e
JH		 3147 SvGROW(sv, sizeof(struct perl_thread) + 1);
3148 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 3149 thr = (Thread) SvPVX(sv);
949ced2d 3150#ifdef DEBUGGING
52e1cb5e 3151 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS		 3152 PL_markstack = 0;
3153 PL_scopestack = 0;
3154 PL_savestack = 0;
3155 PL_retstack = 0;
3156 PL_dirty = 0;
3157 PL_localizing = 0;
949ced2d
GS		 3158 Zero(&PL_hv_fetch_ent_mh, 1, HE);
3159#else
3160 Zero(thr, 1, struct perl_thread);
3161#endif
199100c8 3162
cea2e8a9 3163 PL_protect = FUNC_NAME_TO_PTR(Perl_default_protect);
312caa8e 3164
199100c8 3165 thr->oursv = sv;
cea2e8a9 3166 init_stacks();
a863c7d1 3167
533c011a 3168 PL_curcop = &PL_compiling;
199100c8 3169 thr->cvcache = newHV();
54b9620d 3170 thr->threadsv = newAV();
a863c7d1 3171 thr->specific = newAV();
79cb57f6 3172 thr->errsv = newSVpvn("", 0);
38a03e6e 3173 thr->errhv = newHV();
a863c7d1
MB		 3174 thr->flags = THRf_R_JOINABLE;
3175 MUTEX_INIT(&thr->mutex);
199100c8 3176
d55594ae
GS		 3177 /* top_env needs to be non-zero. It points to an area
3178 in which longjmp() stuff is stored, as C callstack
3179 info there at least is thread specific this has to
3180 be per-thread. Otherwise a 'die' in a thread gives
3181 that thread the C stack of last thread to do an eval {}!
3182 See comments in scope.h
3183 Initialize top entry (as in perl.c for main thread)
3184 */
533c011a
NIS		 3185 PL_start_env.je_prev = NULL;
3186 PL_start_env.je_ret = -1;
3187 PL_start_env.je_mustcatch = TRUE;
3188 PL_top_env = &PL_start_env;
3189
faef0170 3190 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR) */
533c011a
NIS		 3191 PL_restartop = 0;
3192
b099ddc0
GS		 3193 PL_statname = NEWSV(66,0);
3194 PL_maxscream = -1;
cea2e8a9
GS		 3195 PL_regcompp = FUNC_NAME_TO_PTR(Perl_pregcomp);
3196 PL_regexecp = FUNC_NAME_TO_PTR(Perl_regexec_flags);
b099ddc0
GS		 3197 PL_regindent = 0;
3198 PL_reginterp_cnt = 0;
3199 PL_lastscream = Nullsv;
3200 PL_screamfirst = 0;
3201 PL_screamnext = 0;
3202 PL_reg_start_tmp = 0;
3203 PL_reg_start_tmpl = 0;
3204
3205 /* parent thread's data needs to be locked while we make copy */
3206 MUTEX_LOCK(&t->mutex);
3207
312caa8e
CS		 3208 PL_protect = t->Tprotect;
3209
b099ddc0
GS		 3210 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
3211 PL_defstash = t->Tdefstash; /* XXX maybe these should */
3212 PL_curstash = t->Tcurstash; /* always be set to main? */
3213
6b88bc9c 3214 PL_tainted = t->Ttainted;
84fee439
NIS		 3215 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
3216 PL_nrs = newSVsv(t->Tnrs);
3217 PL_rs = SvREFCNT_inc(PL_nrs);
3218 PL_last_in_gv = Nullgv;
3219 PL_ofslen = t->Tofslen;
3220 PL_ofs = savepvn(t->Tofs, PL_ofslen);
3221 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
3222 PL_chopset = t->Tchopset;
3223 PL_formtarget = newSVsv(t->Tformtarget);
3224 PL_bodytarget = newSVsv(t->Tbodytarget);
3225 PL_toptarget = newSVsv(t->Ttoptarget);
533c011a 3226
54b9620d
MB		 3227 /* Initialise all per-thread SVs that the template thread used */
3228 svp = AvARRAY(t->threadsv);
93965878 3229 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 3230 if (*svp && *svp != &PL_sv_undef) {
199100c8 3231 SV *sv = newSVsv(*svp);
54b9620d 3232 av_store(thr->threadsv, i, sv);
533c011a 3233 sv_magic(sv, 0, 0, &PL_threadsv_names[i], 1);
8b73bbec 3234 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 3235 "new_struct_thread: copied threadsv %d %p->%p\n",i, t, thr));
199100c8
MB		 3236 }
3237 }
940cb80d 3238 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 3239
533c011a
NIS		 3240 MUTEX_LOCK(&PL_threads_mutex);
3241 PL_nthreads++;
3242 thr->tid = ++PL_threadnum;
199100c8
MB		 3243 thr->next = t->next;
3244 thr->prev = t;
3245 t->next = thr;
3246 thr->next->prev = thr;
533c011a 3247 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 3248
b099ddc0
GS		 3249 /* done copying parent's state */
3250 MUTEX_UNLOCK(&t->mutex);
3251
a863c7d1 3252#ifdef HAVE_THREAD_INTERN
4f63d024 3253 Perl_init_thread_intern(thr);
a863c7d1 3254#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB		 3255 return thr;
3256}
11343788 3257#endif /* USE_THREADS */
760ac839
LW		 3258
3259#ifdef HUGE_VAL
3260/*
3261 * This hack is to force load of "huge" support from libm.a
3262 * So it is in perl for (say) POSIX to use.
3263 * Needed for SunOS with Sun's 'acc' for example.
3264 */
3265double
8ac85365 3266Perl_huge(void)
760ac839
LW		 3267{
3268 return HUGE_VAL;
3269}
3270#endif
4e35701f 3271
22239a37
NIS		 3272#ifdef PERL_GLOBAL_STRUCT
3273struct perl_vars *
864dbfa3 3274Perl_GetVars(pTHX)
22239a37 3275{
533c011a 3276 return &PL_Vars;
22239a37 3277}
31fb1209
NIS		 3278#endif
3279
3280char **
864dbfa3 3281Perl_get_op_names(pTHX)
31fb1209 3282{
22c35a8c 3283 return PL_op_name;
31fb1209
NIS		 3284}
3285
3286char **
864dbfa3 3287Perl_get_op_descs(pTHX)
31fb1209 3288{
22c35a8c 3289 return PL_op_desc;
31fb1209 3290}
9e6b2b00
GS		 3291
3292char *
864dbfa3 3293Perl_get_no_modify(pTHX)
9e6b2b00 3294{
22c35a8c 3295 return (char*)PL_no_modify;
9e6b2b00
GS		 3296}
3297
3298U32 *
864dbfa3 3299Perl_get_opargs(pTHX)
9e6b2b00 3300{
22c35a8c 3301 return PL_opargs;
9e6b2b00 3302}
51aa15f3 3303
0cb96387
GS		 3304PPADDR_t*
3305Perl_get_ppaddr(pTHX)
3306{
3307 return &PL_ppaddr;
3308}
3309
a6c40364
GS		 3310#ifndef HAS_GETENV_LEN
3311char *
864dbfa3 3312Perl_getenv_len(pTHX_ char *env_elem, unsigned long *len)
a6c40364
GS		 3313{
3314 char *env_trans = PerlEnv_getenv(env_elem);
3315 if (env_trans)
3316 *len = strlen(env_trans);
3317 return env_trans;
f675dbe5
CB		 3318}
3319#endif
3320
dc9e4912
GS		 3321
3322MGVTBL*
864dbfa3 3323Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS		 3324{
3325 MGVTBL* result = Null(MGVTBL*);
3326
3327 switch(vtbl_id) {
3328 case want_vtbl_sv:
3329 result = &PL_vtbl_sv;
3330 break;
3331 case want_vtbl_env:
3332 result = &PL_vtbl_env;
3333 break;
3334 case want_vtbl_envelem:
3335 result = &PL_vtbl_envelem;
3336 break;
3337 case want_vtbl_sig:
3338 result = &PL_vtbl_sig;
3339 break;
3340 case want_vtbl_sigelem:
3341 result = &PL_vtbl_sigelem;
3342 break;
3343 case want_vtbl_pack:
3344 result = &PL_vtbl_pack;
3345 break;
3346 case want_vtbl_packelem:
3347 result = &PL_vtbl_packelem;
3348 break;
3349 case want_vtbl_dbline:
3350 result = &PL_vtbl_dbline;
3351 break;
3352 case want_vtbl_isa:
3353 result = &PL_vtbl_isa;
3354 break;
3355 case want_vtbl_isaelem:
3356 result = &PL_vtbl_isaelem;
3357 break;
3358 case want_vtbl_arylen:
3359 result = &PL_vtbl_arylen;
3360 break;
3361 case want_vtbl_glob:
3362 result = &PL_vtbl_glob;
3363 break;
3364 case want_vtbl_mglob:
3365 result = &PL_vtbl_mglob;
3366 break;
3367 case want_vtbl_nkeys:
3368 result = &PL_vtbl_nkeys;
3369 break;
3370 case want_vtbl_taint:
3371 result = &PL_vtbl_taint;
3372 break;
3373 case want_vtbl_substr:
3374 result = &PL_vtbl_substr;
3375 break;
3376 case want_vtbl_vec:
3377 result = &PL_vtbl_vec;
3378 break;
3379 case want_vtbl_pos:
3380 result = &PL_vtbl_pos;
3381 break;
3382 case want_vtbl_bm:
3383 result = &PL_vtbl_bm;
3384 break;
3385 case want_vtbl_fm:
3386 result = &PL_vtbl_fm;
3387 break;
3388 case want_vtbl_uvar:
3389 result = &PL_vtbl_uvar;
3390 break;
3391#ifdef USE_THREADS
3392 case want_vtbl_mutex:
3393 result = &PL_vtbl_mutex;
3394 break;
3395#endif
3396 case want_vtbl_defelem:
3397 result = &PL_vtbl_defelem;
3398 break;
3399 case want_vtbl_regexp:
3400 result = &PL_vtbl_regexp;
3401 break;
3402 case want_vtbl_regdata:
3403 result = &PL_vtbl_regdata;
3404 break;
3405 case want_vtbl_regdatum:
3406 result = &PL_vtbl_regdatum;
3407 break;
3c90161d 3408#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3409 case want_vtbl_collxfrm:
3410 result = &PL_vtbl_collxfrm;
3411 break;
3c90161d 3412#endif
dc9e4912
GS		 3413 case want_vtbl_amagic:
3414 result = &PL_vtbl_amagic;
3415 break;
3416 case want_vtbl_amagicelem:
3417 result = &PL_vtbl_amagicelem;
3418 break;
810b8aa5
GS		 3419 case want_vtbl_backref:
3420 result = &PL_vtbl_backref;
3421 break;
dc9e4912
GS		 3422 }
3423 return result;
3424}
3425
767df6a1 3426I32
864dbfa3 3427Perl_my_fflush_all(pTHX)
767df6a1
JH		 3428{
3429#ifdef FFLUSH_NULL
ce720889 3430 return PerlIO_flush(NULL);
767df6a1
JH		 3431#else
3432 long open_max = -1;
ed39a0f2 3433# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
d2201af2
AD		 3434# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3435 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3436# else
767df6a1
JH		 3437# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3438 open_max = sysconf(_SC_OPEN_MAX);
3439# else
3440# ifdef FOPEN_MAX
d2201af2 3441 open_max = FOPEN_MAX;
767df6a1
JH		 3442# else
3443# ifdef OPEN_MAX
d2201af2 3444 open_max = OPEN_MAX;
767df6a1
JH		 3445# else
3446# ifdef _NFILE
d2201af2 3447 open_max = _NFILE;
767df6a1
JH		 3448# endif
3449# endif
3450# endif
3451# endif
d2201af2 3452# endif
767df6a1
JH		 3453 if (open_max > 0) {
3454 long i;
3455 for (i = 0; i < open_max; i++)
d2201af2
AD		 3456 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3457 STDIO_STREAM_ARRAY[i]._file < open_max &&
3458 STDIO_STREAM_ARRAY[i]._flag)
3459 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 3460 return 0;
3461 }
3462# endif
3463 SETERRNO(EBADF,RMS$_IFI);
3464 return EOF;
3465#endif
3466}
097ee67d
JH		 3467
3468double
3469Perl_my_atof(const char* s) {
3470#ifdef USE_LOCALE_NUMERIC
d43ce814 3471 if ((PL_hints & HINT_LOCALE) && PL_numeric_local) {
097ee67d
JH		 3472 double x, y;
3473
3474 x = atof(s);
3475 SET_NUMERIC_STANDARD();
3476 y = atof(s);
3477 SET_NUMERIC_LOCAL();
3478 if ((y < 0.0 && y < x) || (y > 0.0 && y > x))
3479 return y;
3480 return x;
3481 } else
3482 return atof(s);
3483#else
3484 return atof(s);
3485#endif
3486}
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