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[perl #24254] Attempt to free unreferenced scalar
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
a687059c 5 *
d48672a2
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
8d063cd8 9 */
a0d0e21e
LW
10
11/*
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
14 */
8d063cd8 15
166f8a29
DM
16/* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
20 */
21
8d063cd8 22#include "EXTERN.h"
864dbfa3 23#define PERL_IN_UTIL_C
8d063cd8 24#include "perl.h"
62b28dd9 25
64ca3a65 26#ifndef PERL_MICRO
a687059c 27#include <signal.h>
36477c24
PP
28#ifndef SIG_ERR
29# define SIG_ERR ((Sighandler_t) -1)
30#endif
64ca3a65 31#endif
36477c24 32
172d2248
OS
33#ifdef __Lynx__
34/* Missing protos on LynxOS */
35int putenv(char *);
36#endif
37
ff68c719
PP
38#ifdef I_SYS_WAIT
39# include <sys/wait.h>
40#endif
41
868439a2
JH
42#ifdef HAS_SELECT
43# ifdef I_SYS_SELECT
44# include <sys/select.h>
45# endif
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
16cebae2
GS
50#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51# define FD_CLOEXEC 1 /* NeXT needs this */
52#endif
53
a687059c
LW
54/* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
58 */
59
26fa51c3
AMS
60/* paranoid version of system's malloc() */
61
bd4080b3 62Malloc_t
4f63d024 63Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 64{
54aff467 65 dTHX;
bd4080b3 66 Malloc_t ptr;
55497cff 67#ifdef HAS_64K_LIMIT
62b28dd9 68 if (size > 0xffff) {
bf49b057 69 PerlIO_printf(Perl_error_log,
16cebae2 70 "Allocation too large: %lx\n", size) FLUSH;
54aff467 71 my_exit(1);
62b28dd9 72 }
55497cff 73#endif /* HAS_64K_LIMIT */
34de22dd
LW
74#ifdef DEBUGGING
75 if ((long)size < 0)
4f63d024 76 Perl_croak_nocontext("panic: malloc");
34de22dd 77#endif
12ae5dfc 78 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 79 PERL_ALLOC_CHECK(ptr);
97835f67 80 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
8d063cd8
LW
81 if (ptr != Nullch)
82 return ptr;
3280af22 83 else if (PL_nomemok)
7c0587c8 84 return Nullch;
8d063cd8 85 else {
e0767201
GA
86 /* Can't use PerlIO to write as it allocates memory */
87 PerlLIO_write(PerlIO_fileno(Perl_error_log),
88 PL_no_mem, strlen(PL_no_mem));
54aff467 89 my_exit(1);
3aed30dc 90 return Nullch;
8d063cd8
LW
91 }
92 /*NOTREACHED*/
93}
94
f2517201 95/* paranoid version of system's realloc() */
8d063cd8 96
bd4080b3 97Malloc_t
4f63d024 98Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 99{
54aff467 100 dTHX;
bd4080b3 101 Malloc_t ptr;
9a34ef1d 102#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 103 Malloc_t PerlMem_realloc();
ecfc5424 104#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 105
a1d180c4 106#ifdef HAS_64K_LIMIT
5f05dabc 107 if (size > 0xffff) {
bf49b057 108 PerlIO_printf(Perl_error_log,
5f05dabc 109 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 110 my_exit(1);
5f05dabc 111 }
55497cff 112#endif /* HAS_64K_LIMIT */
7614df0c 113 if (!size) {
f2517201 114 safesysfree(where);
7614df0c
JD
115 return NULL;
116 }
117
378cc40b 118 if (!where)
f2517201 119 return safesysmalloc(size);
34de22dd
LW
120#ifdef DEBUGGING
121 if ((long)size < 0)
4f63d024 122 Perl_croak_nocontext("panic: realloc");
34de22dd 123#endif
12ae5dfc 124 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 125 PERL_ALLOC_CHECK(ptr);
a1d180c4 126
97835f67
JH
127 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
128 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 129
8d063cd8
LW
130 if (ptr != Nullch)
131 return ptr;
3280af22 132 else if (PL_nomemok)
7c0587c8 133 return Nullch;
8d063cd8 134 else {
e0767201
GA
135 /* Can't use PerlIO to write as it allocates memory */
136 PerlLIO_write(PerlIO_fileno(Perl_error_log),
137 PL_no_mem, strlen(PL_no_mem));
54aff467 138 my_exit(1);
4e35701f 139 return Nullch;
8d063cd8
LW
140 }
141 /*NOTREACHED*/
142}
143
f2517201 144/* safe version of system's free() */
8d063cd8 145
54310121 146Free_t
4f63d024 147Perl_safesysfree(Malloc_t where)
8d063cd8 148{
27da23d5 149 dVAR;
155aba94 150#ifdef PERL_IMPLICIT_SYS
54aff467 151 dTHX;
155aba94 152#endif
97835f67 153 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 154 if (where) {
6ad3d225 155 PerlMem_free(where);
378cc40b 156 }
8d063cd8
LW
157}
158
f2517201 159/* safe version of system's calloc() */
1050c9ca 160
bd4080b3 161Malloc_t
4f63d024 162Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 163{
54aff467 164 dTHX;
bd4080b3 165 Malloc_t ptr;
1050c9ca 166
55497cff 167#ifdef HAS_64K_LIMIT
5f05dabc 168 if (size * count > 0xffff) {
bf49b057 169 PerlIO_printf(Perl_error_log,
5f05dabc 170 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 171 my_exit(1);
5f05dabc 172 }
55497cff 173#endif /* HAS_64K_LIMIT */
1050c9ca
PP
174#ifdef DEBUGGING
175 if ((long)size < 0 || (long)count < 0)
4f63d024 176 Perl_croak_nocontext("panic: calloc");
1050c9ca 177#endif
0b7c1c42 178 size *= count;
12ae5dfc 179 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 180 PERL_ALLOC_CHECK(ptr);
97835f67 181 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size));
1050c9ca
PP
182 if (ptr != Nullch) {
183 memset((void*)ptr, 0, size);
184 return ptr;
185 }
3280af22 186 else if (PL_nomemok)
1050c9ca
PP
187 return Nullch;
188 else {
e0767201
GA
189 /* Can't use PerlIO to write as it allocates memory */
190 PerlLIO_write(PerlIO_fileno(Perl_error_log),
191 PL_no_mem, strlen(PL_no_mem));
54aff467 192 my_exit(1);
4e35701f 193 return Nullch;
1050c9ca
PP
194 }
195 /*NOTREACHED*/
196}
197
cae6d0e5
GS
198/* These must be defined when not using Perl's malloc for binary
199 * compatibility */
200
201#ifndef MYMALLOC
202
203Malloc_t Perl_malloc (MEM_SIZE nbytes)
204{
205 dTHXs;
077a72a9 206 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS
207}
208
209Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
210{
211 dTHXs;
077a72a9 212 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS
213}
214
215Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
216{
217 dTHXs;
077a72a9 218 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS
219}
220
221Free_t Perl_mfree (Malloc_t where)
222{
223 dTHXs;
224 PerlMem_free(where);
225}
226
227#endif
228
8d063cd8
LW
229/* copy a string up to some (non-backslashed) delimiter, if any */
230
231char *
e1ec3a88 232Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
8d063cd8 233{
fc36a67e
PP
234 register I32 tolen;
235 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW
236 if (*from == '\\') {
237 if (from[1] == delim)
238 from++;
fc36a67e
PP
239 else {
240 if (to < toend)
241 *to++ = *from;
242 tolen++;
243 from++;
244 }
378cc40b 245 }
bedebaa5 246 else if (*from == delim)
8d063cd8 247 break;
fc36a67e
PP
248 if (to < toend)
249 *to++ = *from;
8d063cd8 250 }
bedebaa5
CS
251 if (to < toend)
252 *to = '\0';
fc36a67e 253 *retlen = tolen;
73d840c0 254 return (char *)from;
8d063cd8
LW
255}
256
257/* return ptr to little string in big string, NULL if not found */
378cc40b 258/* This routine was donated by Corey Satten. */
8d063cd8
LW
259
260char *
864dbfa3 261Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 262{
79072805 263 register I32 first;
378cc40b 264
a687059c 265 if (!little)
08105a92 266 return (char*)big;
a687059c 267 first = *little++;
378cc40b 268 if (!first)
08105a92 269 return (char*)big;
378cc40b 270 while (*big) {
66a1b24b 271 register const char *s, *x;
378cc40b
LW
272 if (*big++ != first)
273 continue;
274 for (x=big,s=little; *s; /**/ ) {
275 if (!*x)
276 return Nullch;
277 if (*s++ != *x++) {
278 s--;
279 break;
280 }
281 }
282 if (!*s)
08105a92 283 return (char*)(big-1);
378cc40b
LW
284 }
285 return Nullch;
286}
8d063cd8 287
a687059c
LW
288/* same as instr but allow embedded nulls */
289
290char *
864dbfa3 291Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 292{
e1ec3a88 293 register const I32 first = *little;
08105a92 294 register const char *littleend = lend;
378cc40b 295
a0d0e21e 296 if (!first && little >= littleend)
08105a92 297 return (char*)big;
de3bb511
LW
298 if (bigend - big < littleend - little)
299 return Nullch;
a687059c
LW
300 bigend -= littleend - little++;
301 while (big <= bigend) {
66a1b24b 302 register const char *s, *x;
a687059c
LW
303 if (*big++ != first)
304 continue;
305 for (x=big,s=little; s < littleend; /**/ ) {
306 if (*s++ != *x++) {
307 s--;
308 break;
309 }
310 }
311 if (s >= littleend)
08105a92 312 return (char*)(big-1);
378cc40b 313 }
a687059c
LW
314 return Nullch;
315}
316
317/* reverse of the above--find last substring */
318
319char *
864dbfa3 320Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 321{
08105a92 322 register const char *bigbeg;
e1ec3a88 323 register const I32 first = *little;
08105a92 324 register const char *littleend = lend;
a687059c 325
a0d0e21e 326 if (!first && little >= littleend)
08105a92 327 return (char*)bigend;
a687059c
LW
328 bigbeg = big;
329 big = bigend - (littleend - little++);
330 while (big >= bigbeg) {
66a1b24b 331 register const char *s, *x;
a687059c
LW
332 if (*big-- != first)
333 continue;
334 for (x=big+2,s=little; s < littleend; /**/ ) {
335 if (*s++ != *x++) {
336 s--;
337 break;
338 }
339 }
340 if (s >= littleend)
08105a92 341 return (char*)(big+1);
378cc40b 342 }
a687059c 343 return Nullch;
378cc40b 344}
a687059c 345
cf93c79d
IZ
346#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
347
348/* As a space optimization, we do not compile tables for strings of length
349 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
350 special-cased in fbm_instr().
351
352 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
353
954c1994 354/*
ccfc67b7
JH
355=head1 Miscellaneous Functions
356
954c1994
GS
357=for apidoc fbm_compile
358
359Analyses the string in order to make fast searches on it using fbm_instr()
360-- the Boyer-Moore algorithm.
361
362=cut
363*/
364
378cc40b 365void
7506f9c3 366Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 367{
0d46e09a 368 register const U8 *s;
79072805 369 register U32 i;
0b71040e 370 STRLEN len;
79072805
LW
371 I32 rarest = 0;
372 U32 frequency = 256;
373
c517dc2b 374 if (flags & FBMcf_TAIL) {
890ce7af 375 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
cf93c79d 376 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
c517dc2b
JH
377 if (mg && mg->mg_len >= 0)
378 mg->mg_len++;
379 }
9cbe880b 380 s = (U8*)SvPV_force_mutable(sv, len);
862a34c6 381 SvUPGRADE(sv, SVt_PVBM);
d1be9408 382 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 383 return;
02128f11 384 if (len > 2) {
9cbe880b 385 const unsigned char *sb;
66a1b24b 386 const U8 mlen = (len>255) ? 255 : (U8)len;
890ce7af 387 register U8 *table;
cf93c79d 388
7506f9c3 389 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
9cbe880b 390 table = (unsigned char*)(SvPVX_mutable(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS
391 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
392 memset((void*)table, mlen, 256);
393 table[-1] = (U8)flags;
02128f11 394 i = 0;
7506f9c3 395 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ
396 while (s >= sb) {
397 if (table[*s] == mlen)
7506f9c3 398 table[*s] = (U8)i;
cf93c79d
IZ
399 s--, i++;
400 }
378cc40b 401 }
14befaf4 402 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 403 SvVALID_on(sv);
378cc40b 404
9cbe880b 405 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 406 for (i = 0; i < len; i++) {
22c35a8c 407 if (PL_freq[s[i]] < frequency) {
bbce6d69 408 rarest = i;
22c35a8c 409 frequency = PL_freq[s[i]];
378cc40b
LW
410 }
411 }
79072805 412 BmRARE(sv) = s[rarest];
eb160463 413 BmPREVIOUS(sv) = (U16)rarest;
cf93c79d
IZ
414 BmUSEFUL(sv) = 100; /* Initial value */
415 if (flags & FBMcf_TAIL)
416 SvTAIL_on(sv);
7506f9c3
GS
417 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
418 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW
419}
420
cf93c79d
IZ
421/* If SvTAIL(littlestr), it has a fake '\n' at end. */
422/* If SvTAIL is actually due to \Z or \z, this gives false positives
423 if multiline */
424
954c1994
GS
425/*
426=for apidoc fbm_instr
427
428Returns the location of the SV in the string delimited by C<str> and
429C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
430does not have to be fbm_compiled, but the search will not be as fast
431then.
432
433=cut
434*/
435
378cc40b 436char *
864dbfa3 437Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 438{
a687059c 439 register unsigned char *s;
cf93c79d 440 STRLEN l;
9cbe880b
NC
441 register const unsigned char *little
442 = (const unsigned char *)SvPV_const(littlestr,l);
cf93c79d 443 register STRLEN littlelen = l;
e1ec3a88 444 register const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 445
eb160463 446 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 447 if ( SvTAIL(littlestr)
eb160463 448 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 449 && (littlelen == 1
12ae5dfc 450 || (*big == *little &&
27da23d5 451 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ
452 return (char*)big;
453 return Nullch;
454 }
378cc40b 455
cf93c79d 456 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ
457
458 if (littlelen == 1) {
459 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
460 /* Know that bigend != big. */
461 if (bigend[-1] == '\n')
462 return (char *)(bigend - 1);
463 return (char *) bigend;
464 }
465 s = big;
466 while (s < bigend) {
467 if (*s == *little)
468 return (char *)s;
469 s++;
470 }
471 if (SvTAIL(littlestr))
472 return (char *) bigend;
473 return Nullch;
474 }
475 if (!littlelen)
476 return (char*)big; /* Cannot be SvTAIL! */
477
478 /* littlelen is 2 */
479 if (SvTAIL(littlestr) && !multiline) {
480 if (bigend[-1] == '\n' && bigend[-2] == *little)
481 return (char*)bigend - 2;
482 if (bigend[-1] == *little)
483 return (char*)bigend - 1;
484 return Nullch;
485 }
486 {
487 /* This should be better than FBM if c1 == c2, and almost
488 as good otherwise: maybe better since we do less indirection.
489 And we save a lot of memory by caching no table. */
66a1b24b
AL
490 const unsigned char c1 = little[0];
491 const unsigned char c2 = little[1];
cf93c79d
IZ
492
493 s = big + 1;
494 bigend--;
495 if (c1 != c2) {
496 while (s <= bigend) {
497 if (s[0] == c2) {
498 if (s[-1] == c1)
499 return (char*)s - 1;
500 s += 2;
501 continue;
3fe6f2dc 502 }
cf93c79d
IZ
503 next_chars:
504 if (s[0] == c1) {
505 if (s == bigend)
506 goto check_1char_anchor;
507 if (s[1] == c2)
508 return (char*)s;
509 else {
510 s++;
511 goto next_chars;
512 }
513 }
514 else
515 s += 2;
516 }
517 goto check_1char_anchor;
518 }
519 /* Now c1 == c2 */
520 while (s <= bigend) {
521 if (s[0] == c1) {
522 if (s[-1] == c1)
523 return (char*)s - 1;
524 if (s == bigend)
525 goto check_1char_anchor;
526 if (s[1] == c1)
527 return (char*)s;
528 s += 3;
02128f11 529 }
c277df42 530 else
cf93c79d 531 s += 2;
c277df42 532 }
c277df42 533 }
cf93c79d
IZ
534 check_1char_anchor: /* One char and anchor! */
535 if (SvTAIL(littlestr) && (*bigend == *little))
536 return (char *)bigend; /* bigend is already decremented. */
537 return Nullch;
d48672a2 538 }
cf93c79d 539 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 540 s = bigend - littlelen;
a1d180c4 541 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
542 /* Automatically of length > 2 */
543 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 544 {
bbce6d69 545 return (char*)s; /* how sweet it is */
7506f9c3
GS
546 }
547 if (s[1] == *little
548 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
549 {
cf93c79d 550 return (char*)s + 1; /* how sweet it is */
7506f9c3 551 }
02128f11
IZ
552 return Nullch;
553 }
cf93c79d 554 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
c4420975 555 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ
556 (char*)little, (char*)little + littlelen);
557
558 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
559 /* Chop \n from littlestr: */
560 s = bigend - littlelen + 1;
7506f9c3
GS
561 if (*s == *little
562 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
563 {
3fe6f2dc 564 return (char*)s;
7506f9c3 565 }
cf93c79d 566 return Nullch;
a687059c 567 }
cf93c79d 568 return b;
a687059c 569 }
a1d180c4 570
cf93c79d 571 { /* Do actual FBM. */
c4420975 572 register const unsigned char * const table = little + littlelen + FBM_TABLE_OFFSET;
0d46e09a 573 register const unsigned char *oldlittle;
cf93c79d 574
eb160463 575 if (littlelen > (STRLEN)(bigend - big))
cf93c79d
IZ
576 return Nullch;
577 --littlelen; /* Last char found by table lookup */
578
579 s = big + littlelen;
580 little += littlelen; /* last char */
581 oldlittle = little;
582 if (s < bigend) {
583 register I32 tmp;
584
585 top2:
7506f9c3 586 if ((tmp = table[*s])) {
cf93c79d 587 if ((s += tmp) < bigend)
62b28dd9 588 goto top2;
cf93c79d
IZ
589 goto check_end;
590 }
591 else { /* less expensive than calling strncmp() */
66a1b24b 592 register unsigned char * const olds = s;
cf93c79d
IZ
593
594 tmp = littlelen;
595
596 while (tmp--) {
597 if (*--s == *--little)
598 continue;
cf93c79d
IZ
599 s = olds + 1; /* here we pay the price for failure */
600 little = oldlittle;
601 if (s < bigend) /* fake up continue to outer loop */
602 goto top2;
603 goto check_end;
604 }
605 return (char *)s;
a687059c 606 }
378cc40b 607 }
cf93c79d
IZ
608 check_end:
609 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH
610 && memEQ((char *)(bigend - littlelen),
611 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ
612 return (char*)bigend - littlelen;
613 return Nullch;
378cc40b 614 }
378cc40b
LW
615}
616
c277df42
IZ
617/* start_shift, end_shift are positive quantities which give offsets
618 of ends of some substring of bigstr.
a0288114 619 If "last" we want the last occurrence.
c277df42 620 old_posp is the way of communication between consequent calls if
a1d180c4 621 the next call needs to find the .
c277df42 622 The initial *old_posp should be -1.
cf93c79d
IZ
623
624 Note that we take into account SvTAIL, so one can get extra
625 optimizations if _ALL flag is set.
c277df42
IZ
626 */
627
cf93c79d 628/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 629 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ
630 is not supported yet. */
631
378cc40b 632char *
864dbfa3 633Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 634{
0d46e09a 635 register const unsigned char *big;
79072805
LW
636 register I32 pos;
637 register I32 previous;
638 register I32 first;
0d46e09a 639 register const unsigned char *little;
c277df42 640 register I32 stop_pos;
0d46e09a 641 register const unsigned char *littleend;
c277df42 642 I32 found = 0;
378cc40b 643
c277df42 644 if (*old_posp == -1
3280af22 645 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ
646 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
647 cant_find:
a1d180c4 648 if ( BmRARE(littlestr) == '\n'
cf93c79d 649 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
cfd0369c 650 little = (const unsigned char *)(SvPVX_const(littlestr));
cf93c79d
IZ
651 littleend = little + SvCUR(littlestr);
652 first = *little++;
653 goto check_tail;
654 }
378cc40b 655 return Nullch;
cf93c79d
IZ
656 }
657
cfd0369c 658 little = (const unsigned char *)(SvPVX_const(littlestr));
79072805 659 littleend = little + SvCUR(littlestr);
378cc40b 660 first = *little++;
c277df42 661 /* The value of pos we can start at: */
79072805 662 previous = BmPREVIOUS(littlestr);
cfd0369c 663 big = (const unsigned char *)(SvPVX_const(bigstr));
c277df42
IZ
664 /* The value of pos we can stop at: */
665 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 666 if (previous + start_shift > stop_pos) {
0fe87f7c
HS
667/*
668 stop_pos does not include SvTAIL in the count, so this check is incorrect
669 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
670*/
671#if 0
cf93c79d
IZ
672 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
673 goto check_tail;
0fe87f7c 674#endif
cf93c79d
IZ
675 return Nullch;
676 }
c277df42 677 while (pos < previous + start_shift) {
3280af22 678 if (!(pos += PL_screamnext[pos]))
cf93c79d 679 goto cant_find;
378cc40b 680 }
de3bb511 681 big -= previous;
bbce6d69 682 do {
0d46e09a 683 register const unsigned char *s, *x;
ef64f398 684 if (pos >= stop_pos) break;
bbce6d69
PP
685 if (big[pos] != first)
686 continue;
687 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP
688 if (*s++ != *x++) {
689 s--;
690 break;
378cc40b 691 }
bbce6d69 692 }
c277df42
IZ
693 if (s == littleend) {
694 *old_posp = pos;
695 if (!last) return (char *)(big+pos);
696 found = 1;
697 }
3280af22 698 } while ( pos += PL_screamnext[pos] );
a1d180c4 699 if (last && found)
cf93c79d 700 return (char *)(big+(*old_posp));
cf93c79d
IZ
701 check_tail:
702 if (!SvTAIL(littlestr) || (end_shift > 0))
703 return Nullch;
704 /* Ignore the trailing "\n". This code is not microoptimized */
cfd0369c 705 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
cf93c79d
IZ
706 stop_pos = littleend - little; /* Actual littlestr len */
707 if (stop_pos == 0)
708 return (char*)big;
709 big -= stop_pos;
710 if (*big == first
12ae5dfc
JH
711 && ((stop_pos == 1) ||
712 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ
713 return (char*)big;
714 return Nullch;
8d063cd8
LW
715}
716
79072805 717I32
864dbfa3 718Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 719{
e1ec3a88
AL
720 register const U8 *a = (const U8 *)s1;
721 register const U8 *b = (const U8 *)s2;
79072805 722 while (len--) {
22c35a8c 723 if (*a != *b && *a != PL_fold[*b])
bbce6d69
PP
724 return 1;
725 a++,b++;
726 }
727 return 0;
728}
729
730I32
864dbfa3 731Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 732{
27da23d5 733 dVAR;
e1ec3a88
AL
734 register const U8 *a = (const U8 *)s1;
735 register const U8 *b = (const U8 *)s2;
bbce6d69 736 while (len--) {
22c35a8c 737 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69
PP
738 return 1;
739 a++,b++;
79072805
LW
740 }
741 return 0;
742}
743
8d063cd8
LW
744/* copy a string to a safe spot */
745
954c1994 746/*
ccfc67b7
JH
747=head1 Memory Management
748
954c1994
GS
749=for apidoc savepv
750
61a925ed
AMS
751Perl's version of C<strdup()>. Returns a pointer to a newly allocated
752string which is a duplicate of C<pv>. The size of the string is
753determined by C<strlen()>. The memory allocated for the new string can
754be freed with the C<Safefree()> function.
954c1994
GS
755
756=cut
757*/
758
8d063cd8 759char *
efdfce31 760Perl_savepv(pTHX_ const char *pv)
8d063cd8 761{
e90e2364
NC
762 if (!pv)
763 return Nullch;
66a1b24b
AL
764 else {
765 char *newaddr;
766 const STRLEN pvlen = strlen(pv)+1;
a02a5408 767 Newx(newaddr,pvlen,char);
490a0e98 768 return memcpy(newaddr,pv,pvlen);
66a1b24b 769 }
e90e2364 770
8d063cd8
LW
771}
772
a687059c
LW
773/* same thing but with a known length */
774
954c1994
GS
775/*
776=for apidoc savepvn
777
61a925ed
AMS
778Perl's version of what C<strndup()> would be if it existed. Returns a
779pointer to a newly allocated string which is a duplicate of the first
780C<len> bytes from C<pv>. The memory allocated for the new string can be
781freed with the C<Safefree()> function.
954c1994
GS
782
783=cut
784*/
785
a687059c 786char *
efdfce31 787Perl_savepvn(pTHX_ const char *pv, register I32 len)
a687059c
LW
788{
789 register char *newaddr;
790
a02a5408 791 Newx(newaddr,len+1,char);
92110913 792 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 793 if (pv) {
e90e2364
NC
794 /* might not be null terminated */
795 newaddr[len] = '\0';
07409e01 796 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS
797 }
798 else {
07409e01 799 return (char *) ZeroD(newaddr,len+1,char);
92110913 800 }
a687059c
LW
801}
802
05ec9bb3
NIS
803/*
804=for apidoc savesharedpv
805
61a925ed
AMS
806A version of C<savepv()> which allocates the duplicate string in memory
807which is shared between threads.
05ec9bb3
NIS
808
809=cut
810*/
811char *
efdfce31 812Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 813{
e90e2364 814 register char *newaddr;
490a0e98 815 STRLEN pvlen;
e90e2364
NC
816 if (!pv)
817 return Nullch;
818
490a0e98
NC
819 pvlen = strlen(pv)+1;
820 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364
NC
821 if (!newaddr) {
822 PerlLIO_write(PerlIO_fileno(Perl_error_log),
823 PL_no_mem, strlen(PL_no_mem));
824 my_exit(1);
05ec9bb3 825 }
490a0e98 826 return memcpy(newaddr,pv,pvlen);
05ec9bb3
NIS
827}
828
2e0de35c
NC
829/*
830=for apidoc savesvpv
831
6832267f 832A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC
833the passed in SV using C<SvPV()>
834
835=cut
836*/
837
838char *
839Perl_savesvpv(pTHX_ SV *sv)
840{
841 STRLEN len;
e62f0680 842 const char *pv = SvPV_const(sv, len);
2e0de35c
NC
843 register char *newaddr;
844
26866f99 845 ++len;
a02a5408 846 Newx(newaddr,len,char);
07409e01 847 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 848}
05ec9bb3
NIS
849
850
cea2e8a9 851/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 852
76e3520e 853STATIC SV *
cea2e8a9 854S_mess_alloc(pTHX)
fc36a67e
PP
855{
856 SV *sv;
857 XPVMG *any;
858
e72dc28c
GS
859 if (!PL_dirty)
860 return sv_2mortal(newSVpvn("",0));
861
0372dbb6
GS
862 if (PL_mess_sv)
863 return PL_mess_sv;
864
fc36a67e 865 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC
866 Newx(sv, 1, SV);
867 Newxz(any, 1, XPVMG);
fc36a67e
PP
868 SvFLAGS(sv) = SVt_PVMG;
869 SvANY(sv) = (void*)any;
cace1726 870 SvPV_set(sv, 0);
fc36a67e 871 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 872 PL_mess_sv = sv;
fc36a67e
PP
873 return sv;
874}
875
c5be433b 876#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
877char *
878Perl_form_nocontext(const char* pat, ...)
879{
880 dTHX;
c5be433b 881 char *retval;
cea2e8a9
GS
882 va_list args;
883 va_start(args, pat);
c5be433b 884 retval = vform(pat, &args);
cea2e8a9 885 va_end(args);
c5be433b 886 return retval;
cea2e8a9 887}
c5be433b 888#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 889
7c9e965c 890/*
ccfc67b7 891=head1 Miscellaneous Functions
7c9e965c
JP
892=for apidoc form
893
894Takes a sprintf-style format pattern and conventional
895(non-SV) arguments and returns the formatted string.
896
897 (char *) Perl_form(pTHX_ const char* pat, ...)
898
899can be used any place a string (char *) is required:
900
901 char * s = Perl_form("%d.%d",major,minor);
902
903Uses a single private buffer so if you want to format several strings you
904must explicitly copy the earlier strings away (and free the copies when you
905are done).
906
907=cut
908*/
909
8990e307 910char *
864dbfa3 911Perl_form(pTHX_ const char* pat, ...)
8990e307 912{
c5be433b 913 char *retval;
46fc3d4c 914 va_list args;
46fc3d4c 915 va_start(args, pat);
c5be433b 916 retval = vform(pat, &args);
46fc3d4c 917 va_end(args);
c5be433b
GS
918 return retval;
919}
920
921char *
922Perl_vform(pTHX_ const char *pat, va_list *args)
923{
2d03de9c 924 SV * const sv = mess_alloc();
c5be433b 925 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
e72dc28c 926 return SvPVX(sv);
46fc3d4c 927}
a687059c 928
5a844595
GS
929#if defined(PERL_IMPLICIT_CONTEXT)
930SV *
931Perl_mess_nocontext(const char *pat, ...)
932{
933 dTHX;
934 SV *retval;
935 va_list args;
936 va_start(args, pat);
937 retval = vmess(pat, &args);
938 va_end(args);
939 return retval;
940}
941#endif /* PERL_IMPLICIT_CONTEXT */
942
06bf62c7 943SV *
5a844595
GS
944Perl_mess(pTHX_ const char *pat, ...)
945{
946 SV *retval;
947 va_list args;
948 va_start(args, pat);
949 retval = vmess(pat, &args);
950 va_end(args);
951 return retval;
952}
953
ae7d165c 954STATIC COP*
8772537c 955S_closest_cop(pTHX_ COP *cop, const OP *o)
ae7d165c
PJ
956{
957 /* Look for PL_op starting from o. cop is the last COP we've seen. */
958
959 if (!o || o == PL_op) return cop;
960
961 if (o->op_flags & OPf_KIDS) {
962 OP *kid;
963 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
964 {
965 COP *new_cop;
966
967 /* If the OP_NEXTSTATE has been optimised away we can still use it
968 * the get the file and line number. */
969
970 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
971 cop = (COP *)kid;
972
973 /* Keep searching, and return when we've found something. */
974
975 new_cop = closest_cop(cop, kid);
976 if (new_cop) return new_cop;
977 }
978 }
979
980 /* Nothing found. */
981
8772537c 982 return Null(COP *);
ae7d165c
PJ
983}
984
5a844595
GS
985SV *
986Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 987{
c4420975 988 SV * const sv = mess_alloc();
27da23d5 989 static const char dgd[] = " during global destruction.\n";
46fc3d4c 990
fc36a67e 991 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 992 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
993
994 /*
995 * Try and find the file and line for PL_op. This will usually be
996 * PL_curcop, but it might be a cop that has been optimised away. We
997 * can try to find such a cop by searching through the optree starting
998 * from the sibling of PL_curcop.
999 */
1000
e1ec3a88 1001 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
ae7d165c
PJ
1002 if (!cop) cop = PL_curcop;
1003
1004 if (CopLINE(cop))
ed094faf 1005 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1006 OutCopFILE(cop), (IV)CopLINE(cop));
2035c5e8 1007 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
e1ec3a88 1008 const bool line_mode = (RsSIMPLE(PL_rs) &&
95a20fc0 1009 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
57def98f 1010 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
edc2eac3
JH
1011 PL_last_in_gv == PL_argvgv ?
1012 "" : GvNAME(PL_last_in_gv),
1013 line_mode ? "line" : "chunk",
1014 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1015 }
515f54a1 1016 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1017 }
06bf62c7 1018 return sv;
a687059c
LW
1019}
1020
7ff03255
SG
1021void
1022Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1023{
27da23d5 1024 dVAR;
7ff03255
SG
1025 IO *io;
1026 MAGIC *mg;
1027
1028 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1029 && (io = GvIO(PL_stderrgv))
1030 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1031 {
1032 dSP;
1033 ENTER;
1034 SAVETMPS;
1035
1036 save_re_context();
1037 SAVESPTR(PL_stderrgv);
1038 PL_stderrgv = Nullgv;
1039
1040 PUSHSTACKi(PERLSI_MAGIC);
1041
1042 PUSHMARK(SP);
1043 EXTEND(SP,2);
1044 PUSHs(SvTIED_obj((SV*)io, mg));
1045 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1046 PUTBACK;
1047 call_method("PRINT", G_SCALAR);
1048
1049 POPSTACK;
1050 FREETMPS;
1051 LEAVE;
1052 }
1053 else {
1054#ifdef USE_SFIO
1055 /* SFIO can really mess with your errno */
53c1dcc0 1056 const int e = errno;
7ff03255 1057#endif
53c1dcc0 1058 PerlIO * const serr = Perl_error_log;
7ff03255
SG
1059
1060 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1061 (void)PerlIO_flush(serr);
1062#ifdef USE_SFIO
1063 errno = e;
1064#endif
1065 }
1066}
1067
3ab1ac99
NC
1068/* Common code used by vcroak, vdie and vwarner */
1069
e07360fa 1070STATIC void
63315e18
NC
1071S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8)
1072{
1073 HV *stash;
1074 GV *gv;
1075 CV *cv;
1076 /* sv_2cv might call Perl_croak() */
890ce7af 1077 SV * const olddiehook = PL_diehook;
63315e18
NC
1078
1079 assert(PL_diehook);
1080 ENTER;
1081 SAVESPTR(PL_diehook);
1082 PL_diehook = Nullsv;
1083 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1084 LEAVE;
1085 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1086 dSP;
1087 SV *msg;
1088
1089 ENTER;
1090 save_re_context();
1091 if (message) {
1092 msg = newSVpvn(message, msglen);
1093 SvFLAGS(msg) |= utf8;
1094 SvREADONLY_on(msg);
1095 SAVEFREESV(msg);
1096 }
1097 else {
1098 msg = ERRSV;
1099 }
1100
1101 PUSHSTACKi(PERLSI_DIEHOOK);
1102 PUSHMARK(SP);
1103 XPUSHs(msg);
1104 PUTBACK;
1105 call_sv((SV*)cv, G_DISCARD);
1106 POPSTACK;
1107 LEAVE;
1108 }
1109}
1110
cfd0369c 1111STATIC const char *
e07360fa
AT
1112S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1113 I32* utf8)
1114{
1115 dVAR;
cfd0369c 1116 const char *message;
e07360fa
AT
1117
1118 if (pat) {
890ce7af 1119 SV * const msv = vmess(pat, args);
e07360fa
AT
1120 if (PL_errors && SvCUR(PL_errors)) {
1121 sv_catsv(PL_errors, msv);
cfd0369c 1122 message = SvPV_const(PL_errors, *msglen);
e07360fa
AT
1123 SvCUR_set(PL_errors, 0);
1124 }
1125 else
cfd0369c 1126 message = SvPV_const(msv,*msglen);
e07360fa
AT
1127 *utf8 = SvUTF8(msv);
1128 }
1129 else {
1130 message = Nullch;
1131 }
1132
1133 DEBUG_S(PerlIO_printf(Perl_debug_log,
1134 "%p: die/croak: message = %s\ndiehook = %p\n",
1135 thr, message, PL_diehook));
1136 if (PL_diehook) {
1137 S_vdie_common(aTHX_ message, *msglen, *utf8);
1138 }
1139 return message;
1140}
1141
c5be433b
GS
1142OP *
1143Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1144{
73d840c0 1145 const char *message;
e1ec3a88 1146 const int was_in_eval = PL_in_eval;
06bf62c7 1147 STRLEN msglen;
ff882698 1148 I32 utf8 = 0;
36477c24 1149
bf49b057 1150 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1151 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1152 thr, PL_curstack, PL_mainstack));
36477c24 1153
890ce7af 1154 message = vdie_croak_common(pat, args, &msglen, &utf8);
36477c24 1155
06bf62c7 1156 PL_restartop = die_where(message, msglen);
ff882698 1157 SvFLAGS(ERRSV) |= utf8;
bf49b057 1158 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1159 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1160 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1161 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1162 JMPENV_JUMP(3);
3280af22 1163 return PL_restartop;
36477c24
PP
1164}
1165
c5be433b 1166#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1167OP *
1168Perl_die_nocontext(const char* pat, ...)
a687059c 1169{
cea2e8a9
GS
1170 dTHX;
1171 OP *o;
a687059c 1172 va_list args;
cea2e8a9 1173 va_start(args, pat);
c5be433b 1174 o = vdie(pat, &args);
cea2e8a9
GS
1175 va_end(args);
1176 return o;
1177}
c5be433b 1178#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS
1179
1180OP *
1181Perl_die(pTHX_ const char* pat, ...)
1182{
1183 OP *o;
1184 va_list args;
1185 va_start(args, pat);
c5be433b 1186 o = vdie(pat, &args);
cea2e8a9
GS
1187 va_end(args);
1188 return o;
1189}
1190
c5be433b
GS
1191void
1192Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1193{
73d840c0 1194 const char *message;
06bf62c7 1195 STRLEN msglen;
ff882698 1196 I32 utf8 = 0;
a687059c 1197
3ab1ac99 1198 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
5a844595 1199
3280af22 1200 if (PL_in_eval) {
06bf62c7 1201 PL_restartop = die_where(message, msglen);
ff882698 1202 SvFLAGS(ERRSV) |= utf8;
6224f72b 1203 JMPENV_JUMP(3);
a0d0e21e 1204 }
84414e3e 1205 else if (!message)
cfd0369c 1206 message = SvPVx_const(ERRSV, msglen);
84414e3e 1207
7ff03255 1208 write_to_stderr(message, msglen);
f86702cc 1209 my_failure_exit();
a687059c
LW
1210}
1211
c5be433b 1212#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1213void
cea2e8a9 1214Perl_croak_nocontext(const char *pat, ...)
a687059c 1215{
cea2e8a9 1216 dTHX;
a687059c 1217 va_list args;
cea2e8a9 1218 va_start(args, pat);
c5be433b 1219 vcroak(pat, &args);
cea2e8a9
GS
1220 /* NOTREACHED */
1221 va_end(args);
1222}
1223#endif /* PERL_IMPLICIT_CONTEXT */
1224
954c1994 1225/*
ccfc67b7
JH
1226=head1 Warning and Dieing
1227
954c1994
GS
1228=for apidoc croak
1229
9983fa3c 1230This is the XSUB-writer's interface to Perl's C<die> function.
966353fd
MF
1231Normally call this function the same way you call the C C<printf>
1232function. Calling C<croak> returns control directly to Perl,
1233sidestepping the normal C order of execution. See C<warn>.
9983fa3c
GS
1234
1235If you want to throw an exception object, assign the object to
1236C<$@> and then pass C<Nullch> to croak():
1237
1238 errsv = get_sv("@", TRUE);
1239 sv_setsv(errsv, exception_object);
1240 croak(Nullch);
954c1994
GS
1241
1242=cut
1243*/
1244
cea2e8a9
GS
1245void
1246Perl_croak(pTHX_ const char *pat, ...)
1247{
1248 va_list args;
1249 va_start(args, pat);
c5be433b 1250 vcroak(pat, &args);
cea2e8a9
GS
1251 /* NOTREACHED */
1252 va_end(args);
1253}
1254
c5be433b
GS
1255void
1256Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1257{
27da23d5 1258 dVAR;
06bf62c7 1259 STRLEN msglen;
53c1dcc0
AL
1260 SV * const msv = vmess(pat, args);
1261 const I32 utf8 = SvUTF8(msv);
1262 const char * const message = SvPV_const(msv, msglen);
a687059c 1263
3280af22 1264 if (PL_warnhook) {
cea2e8a9 1265 /* sv_2cv might call Perl_warn() */
53c1dcc0
AL
1266 SV * const oldwarnhook = PL_warnhook;
1267 CV * cv;
1268 HV * stash;
1269 GV * gv;
1270
1738f5c4 1271 ENTER;
3280af22
NIS
1272 SAVESPTR(PL_warnhook);
1273 PL_warnhook = Nullsv;
20cec16a 1274 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS
1275 LEAVE;
1276 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1277 dSP;
774d564b
PP
1278 SV *msg;
1279
1280 ENTER;
c5be5b4d
DM
1281 SAVESPTR(PL_warnhook);
1282 PL_warnhook = Nullsv;
3a1f2dc9 1283 save_re_context();
06bf62c7 1284 msg = newSVpvn(message, msglen);
ff882698 1285 SvFLAGS(msg) |= utf8;
774d564b
PP
1286 SvREADONLY_on(msg);
1287 SAVEFREESV(msg);
1288
e788e7d3 1289 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1290 PUSHMARK(SP);
774d564b 1291 XPUSHs(msg);
20cec16a 1292 PUTBACK;
864dbfa3 1293 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1294 POPSTACK;
774d564b 1295 LEAVE;
20cec16a
PP
1296 return;
1297 }
748a9306 1298 }
87582a92 1299
7ff03255 1300 write_to_stderr(message, msglen);
a687059c 1301}
8d063cd8 1302
c5be433b 1303#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1304void
1305Perl_warn_nocontext(const char *pat, ...)
1306{
1307 dTHX;
1308 va_list args;
1309 va_start(args, pat);
c5be433b 1310 vwarn(pat, &args);
cea2e8a9
GS
1311 va_end(args);
1312}
1313#endif /* PERL_IMPLICIT_CONTEXT */
1314
954c1994
GS
1315/*
1316=for apidoc warn
1317
966353fd
MF
1318This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1319function the same way you call the C C<printf> function. See C<croak>.
954c1994
GS
1320
1321=cut
1322*/
1323
cea2e8a9
GS
1324void
1325Perl_warn(pTHX_ const char *pat, ...)
1326{
1327 va_list args;
1328 va_start(args, pat);
c5be433b 1329 vwarn(pat, &args);
cea2e8a9
GS
1330 va_end(args);
1331}
1332
c5be433b
GS
1333#if defined(PERL_IMPLICIT_CONTEXT)
1334void
1335Perl_warner_nocontext(U32 err, const char *pat, ...)
1336{
27da23d5 1337 dTHX;
c5be433b
GS
1338 va_list args;
1339 va_start(args, pat);
1340 vwarner(err, pat, &args);
1341 va_end(args);
1342}
1343#endif /* PERL_IMPLICIT_CONTEXT */
1344
599cee73 1345void
864dbfa3 1346Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1347{
1348 va_list args;
c5be433b
GS
1349 va_start(args, pat);
1350 vwarner(err, pat, &args);
1351 va_end(args);
1352}
1353
1354void
1355Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1356{
27da23d5 1357 dVAR;
d13b0d77 1358 if (ckDEAD(err)) {
a3b680e6 1359 SV * const msv = vmess(pat, args);
d13b0d77 1360 STRLEN msglen;
cfd0369c 1361 const char *message = SvPV_const(msv, msglen);
a3b680e6 1362 const I32 utf8 = SvUTF8(msv);
599cee73 1363
3aed30dc 1364 if (PL_diehook) {
63315e18
NC
1365 assert(message);
1366 S_vdie_common(aTHX_ message, msglen, utf8);
3aed30dc
HS
1367 }
1368 if (PL_in_eval) {
1369 PL_restartop = die_where(message, msglen);
ff882698 1370 SvFLAGS(ERRSV) |= utf8;
3aed30dc
HS
1371 JMPENV_JUMP(3);
1372 }
7ff03255 1373 write_to_stderr(message, msglen);
3aed30dc 1374 my_failure_exit();
599cee73
PM
1375 }
1376 else {
d13b0d77 1377 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1378 }
1379}
1380
f54ba1c2
DM
1381/* implements the ckWARN? macros */
1382
1383bool
1384Perl_ckwarn(pTHX_ U32 w)
1385{
1386 return
1387 (
1388 isLEXWARN_on
1389 && PL_curcop->cop_warnings != pWARN_NONE
1390 && (
1391 PL_curcop->cop_warnings == pWARN_ALL
1392 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1393 || (unpackWARN2(w) &&
1394 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1395 || (unpackWARN3(w) &&
1396 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1397 || (unpackWARN4(w) &&
1398 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1399 )
1400 )
1401 ||
1402 (
1403 isLEXWARN_off && PL_dowarn & G_WARN_ON
1404 )
1405 ;
1406}
1407
1408/* implements the ckWARN?_d macro */
1409
1410bool
1411Perl_ckwarn_d(pTHX_ U32 w)
1412{
1413 return
1414 isLEXWARN_off
1415 || PL_curcop->cop_warnings == pWARN_ALL
1416 || (
1417 PL_curcop->cop_warnings != pWARN_NONE
1418 && (
1419 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1420 || (unpackWARN2(w) &&
1421 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1422 || (unpackWARN3(w) &&
1423 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1424 || (unpackWARN4(w) &&
1425 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1426 )
1427 )
1428 ;
1429}
1430
1431
1432
e6587932
DM
1433/* since we've already done strlen() for both nam and val
1434 * we can use that info to make things faster than
1435 * sprintf(s, "%s=%s", nam, val)
1436 */
1437#define my_setenv_format(s, nam, nlen, val, vlen) \
1438 Copy(nam, s, nlen, char); \
1439 *(s+nlen) = '='; \
1440 Copy(val, s+(nlen+1), vlen, char); \
1441 *(s+(nlen+1+vlen)) = '\0'
1442
13b6e58c 1443#ifdef USE_ENVIRON_ARRAY
eccd403f 1444 /* VMS' my_setenv() is in vms.c */
2986a63f 1445#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1446void
e1ec3a88 1447Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1448{
27da23d5 1449 dVAR;
4efc5df6
GS
1450#ifdef USE_ITHREADS
1451 /* only parent thread can modify process environment */
1452 if (PL_curinterp == aTHX)
1453#endif
1454 {
f2517201 1455#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1456 if (!PL_use_safe_putenv) {
f2517201 1457 /* most putenv()s leak, so we manipulate environ directly */
79072805 1458 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1459 int nlen, vlen;
8d063cd8 1460
3280af22 1461 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW
1462 I32 j;
1463 I32 max;
fe14fcc3
LW
1464 char **tmpenv;
1465
1466 for (max = i; environ[max]; max++) ;
f2517201
GS
1467 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1468 for (j=0; j<max; j++) { /* copy environment */
e1ec3a88 1469 const int len = strlen(environ[j]);
3aed30dc
HS
1470 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1471 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1472 }
fe14fcc3
LW
1473 tmpenv[max] = Nullch;
1474 environ = tmpenv; /* tell exec where it is now */
1475 }
a687059c 1476 if (!val) {
f2517201 1477 safesysfree(environ[i]);
a687059c
LW
1478 while (environ[i]) {
1479 environ[i] = environ[i+1];
1480 i++;
1481 }
1482 return;
1483 }
8d063cd8 1484 if (!environ[i]) { /* does not exist yet */
f2517201 1485 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW
1486 environ[i+1] = Nullch; /* make sure it's null terminated */
1487 }
fe14fcc3 1488 else
f2517201 1489 safesysfree(environ[i]);
e6587932
DM
1490 nlen = strlen(nam);
1491 vlen = strlen(val);
f2517201 1492
e6587932
DM
1493 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1494 /* all that work just for this */
1495 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95
MS
1496 } else {
1497# endif
a0fd4948 1498# if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__)
88f5bc07
AB
1499# if defined(HAS_UNSETENV)
1500 if (val == NULL) {
1501 (void)unsetenv(nam);
1502 } else {
1503 (void)setenv(nam, val, 1);
1504 }
1505# else /* ! HAS_UNSETENV */
1506 (void)setenv(nam, val, 1);
1507# endif /* HAS_UNSETENV */
47dafe4d 1508# else
88f5bc07
AB
1509# if defined(HAS_UNSETENV)
1510 if (val == NULL) {
1511 (void)unsetenv(nam);
1512 } else {
c4420975
AL
1513 const int nlen = strlen(nam);
1514 const int vlen = strlen(val);
1515 char * const new_env =
88f5bc07
AB
1516 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1517 my_setenv_format(new_env, nam, nlen, val, vlen);
1518 (void)putenv(new_env);
1519 }
1520# else /* ! HAS_UNSETENV */
1521 char *new_env;
c4420975
AL
1522 const int nlen = strlen(nam);
1523 int vlen;
88f5bc07
AB
1524 if (!val) {
1525 val = "";
1526 }
1527 vlen = strlen(val);
1528 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1529 /* all that work just for this */
1530 my_setenv_format(new_env, nam, nlen, val, vlen);
1531 (void)putenv(new_env);
1532# endif /* HAS_UNSETENV */
47dafe4d 1533# endif /* __CYGWIN__ */
50acdf95
MS
1534#ifndef PERL_USE_SAFE_PUTENV
1535 }
1536#endif
4efc5df6 1537 }
8d063cd8
LW
1538}
1539
2986a63f 1540#else /* WIN32 || NETWARE */
68dc0745
PP
1541
1542void
72229eff 1543Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1544{
27da23d5 1545 dVAR;
ac5c734f 1546 register char *envstr;
e1ec3a88
AL
1547 const int nlen = strlen(nam);
1548 int vlen;
e6587932 1549
ac5c734f
GS
1550 if (!val) {
1551 val = "";
1552 }
e6587932 1553 vlen = strlen(val);
a02a5408 1554 Newx(envstr, nlen+vlen+2, char);
e6587932 1555 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS
1556 (void)PerlEnv_putenv(envstr);
1557 Safefree(envstr);
3e3baf6d
TB
1558}
1559
2986a63f 1560#endif /* WIN32 || NETWARE */
3e3baf6d 1561
2f42fcb0 1562#ifndef PERL_MICRO
3e3baf6d 1563I32
e1ec3a88 1564Perl_setenv_getix(pTHX_ const char *nam)
3e3baf6d 1565{
53c1dcc0 1566 register I32 i;
0d46e09a 1567 register const I32 len = strlen(nam);
3e3baf6d
TB
1568
1569 for (i = 0; environ[i]; i++) {
1570 if (
1571#ifdef WIN32
1572 strnicmp(environ[i],nam,len) == 0
1573#else
1574 strnEQ(environ[i],nam,len)
1575#endif
1576 && environ[i][len] == '=')
1577 break; /* strnEQ must come first to avoid */
1578 } /* potential SEGV's */
1579 return i;
68dc0745 1580}
2f42fcb0 1581#endif /* !PERL_MICRO */
68dc0745 1582
ed79a026 1583#endif /* !VMS && !EPOC*/
378cc40b 1584
16d20bd9 1585#ifdef UNLINK_ALL_VERSIONS
79072805 1586I32
6e732051 1587Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 1588{
79072805 1589 I32 i;
378cc40b 1590
6ad3d225 1591 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW
1592 return i ? 0 : -1;
1593}
1594#endif
1595
7a3f2258 1596/* this is a drop-in replacement for bcopy() */
2253333f 1597#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1598char *
7a3f2258 1599Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b 1600{
2d03de9c 1601 char * const retval = to;
378cc40b 1602
7c0587c8
LW
1603 if (from - to >= 0) {
1604 while (len--)
1605 *to++ = *from++;
1606 }
1607 else {
1608 to += len;
1609 from += len;
1610 while (len--)
faf8582f 1611 *(--to) = *(--from);
7c0587c8 1612 }
378cc40b
LW
1613 return retval;
1614}
ffed7fef 1615#endif
378cc40b 1616
7a3f2258 1617/* this is a drop-in replacement for memset() */
fc36a67e
PP
1618#ifndef HAS_MEMSET
1619void *
7a3f2258 1620Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 1621{
2d03de9c 1622 char * const retval = loc;
fc36a67e
PP
1623
1624 while (len--)
1625 *loc++ = ch;
1626 return retval;
1627}
1628#endif
1629
7a3f2258 1630/* this is a drop-in replacement for bzero() */
7c0587c8 1631#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1632char *
7a3f2258 1633Perl_my_bzero(register char *loc, register I32 len)
378cc40b 1634{
2d03de9c 1635 char * const retval = loc;
378cc40b
LW
1636
1637 while (len--)
1638 *loc++ = 0;
1639 return retval;
1640}
1641#endif
7c0587c8 1642
7a3f2258 1643/* this is a drop-in replacement for memcmp() */
36477c24 1644#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1645I32
7a3f2258 1646Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1647{
e1ec3a88
AL
1648 register const U8 *a = (const U8 *)s1;
1649 register const U8 *b = (const U8 *)s2;
79072805 1650 register I32 tmp;
7c0587c8
LW
1651
1652 while (len--) {
27da23d5 1653 if ((tmp = *a++ - *b++))
7c0587c8
LW
1654 return tmp;
1655 }
1656 return 0;
1657}
36477c24 1658#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1659
fe14fcc3 1660#ifndef HAS_VPRINTF
a687059c 1661
85e6fe83 1662#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1663char *
1664#else
1665int
1666#endif
08105a92 1667vsprintf(char *dest, const char *pat, char *args)
a687059c
LW
1668{
1669 FILE fakebuf;
1670
1671 fakebuf._ptr = dest;
1672 fakebuf._cnt = 32767;
35c8bce7
LW
1673#ifndef _IOSTRG
1674#define _IOSTRG 0
1675#endif
a687059c
LW
1676 fakebuf._flag = _IOWRT|_IOSTRG;
1677 _doprnt(pat, args, &fakebuf); /* what a kludge */
1678 (void)putc('\0', &fakebuf);
85e6fe83 1679#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1680 return(dest);
1681#else
1682 return 0; /* perl doesn't use return value */
1683#endif
1684}
1685
fe14fcc3 1686#endif /* HAS_VPRINTF */
a687059c
LW
1687
1688#ifdef MYSWAP
ffed7fef 1689#if BYTEORDER != 0x4321
a687059c 1690short
864dbfa3 1691Perl_my_swap(pTHX_ short s)
a687059c
LW
1692{
1693#if (BYTEORDER & 1) == 0
1694 short result;
1695
1696 result = ((s & 255) << 8) + ((s >> 8) & 255);
1697 return result;
1698#else
1699 return s;
1700#endif
1701}
1702
1703long
864dbfa3 1704Perl_my_htonl(pTHX_ long l)
a687059c
LW
1705{
1706 union {
1707 long result;
ffed7fef 1708 char c[sizeof(long)];
a687059c
LW
1709 } u;
1710
ffed7fef 1711#if BYTEORDER == 0x1234
a687059c
LW
1712 u.c[0] = (l >> 24) & 255;
1713 u.c[1] = (l >> 16) & 255;
1714 u.c[2] = (l >> 8) & 255;
1715 u.c[3] = l & 255;
1716 return u.result;
1717#else
ffed7fef 1718#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1719 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1720#else
79072805
LW
1721 register I32 o;
1722 register I32 s;
a687059c 1723
ffed7fef
LW
1724 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1725 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW
1726 }
1727 return u.result;
1728#endif
1729#endif
1730}
1731
1732long
864dbfa3 1733Perl_my_ntohl(pTHX_ long l)
a687059c
LW
1734{
1735 union {
1736 long l;
ffed7fef 1737 char c[sizeof(long)];
a687059c
LW
1738 } u;
1739
ffed7fef 1740#if BYTEORDER == 0x1234
a687059c
LW
1741 u.c[0] = (l >> 24) & 255;
1742 u.c[1] = (l >> 16) & 255;
1743 u.c[2] = (l >> 8) & 255;
1744 u.c[3] = l & 255;
1745 return u.l;
1746#else
ffed7fef 1747#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1748 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1749#else
79072805
LW
1750 register I32 o;
1751 register I32 s;
a687059c
LW
1752
1753 u.l = l;
1754 l = 0;
ffed7fef
LW
1755 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1756 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW
1757 }
1758 return l;
1759#endif
1760#endif
1761}
1762
ffed7fef 1763#endif /* BYTEORDER != 0x4321 */
988174c1
LW
1764#endif /* MYSWAP */
1765
1766/*
1767 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1768 * If these functions are defined,
1769 * the BYTEORDER is neither 0x1234 nor 0x4321.
1770 * However, this is not assumed.
1771 * -DWS
1772 */
1773
1109a392 1774#define HTOLE(name,type) \
988174c1 1775 type \
ba106d47 1776 name (register type n) \
988174c1
LW
1777 { \
1778 union { \
1779 type value; \
1780 char c[sizeof(type)]; \
1781 } u; \
79072805 1782 register I32 i; \
1109a392
MHM
1783 register I32 s = 0; \
1784 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW
1785 u.c[i] = (n >> s) & 0xFF; \
1786 } \
1787 return u.value; \
1788 }
1789
1109a392 1790#define LETOH(name,type) \
988174c1 1791 type \
ba106d47 1792 name (register type n) \
988174c1
LW
1793 { \
1794 union { \
1795 type value; \
1796 char c[sizeof(type)]; \
1797 } u; \
79072805 1798 register I32 i; \
1109a392 1799 register I32 s = 0; \
988174c1
LW
1800 u.value = n; \
1801 n = 0; \
1109a392
MHM
1802 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1803 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW
1804 } \
1805 return n; \
1806 }
1807
1109a392
MHM
1808/*
1809 * Big-endian byte order functions.
1810 */
1811
1812#define HTOBE(name,type) \
1813 type \
1814 name (register type n) \
1815 { \
1816 union { \
1817 type value; \
1818 char c[sizeof(type)]; \
1819 } u; \
1820 register I32 i; \
1821 register I32 s = 8*(sizeof(u.c)-1); \
1822 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1823 u.c[i] = (n >> s) & 0xFF; \
1824 } \
1825 return u.value; \
1826 }
1827
1828#define BETOH(name,type) \
1829 type \
1830 name (register type n) \
1831 { \
1832 union { \
1833 type value; \
1834 char c[sizeof(type)]; \
1835 } u; \
1836 register I32 i; \
1837 register I32 s = 8*(sizeof(u.c)-1); \
1838 u.value = n; \
1839 n = 0; \
1840 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
1841 n |= ((type)(u.c[i] & 0xFF)) << s; \
1842 } \
1843 return n; \
1844 }
1845
1846/*
1847 * If we just can't do it...
1848 */
1849
1850#define NOT_AVAIL(name,type) \
1851 type \
1852 name (register type n) \
1853 { \
1854 Perl_croak_nocontext(#name "() not available"); \
1855 return n; /* not reached */ \
1856 }
1857
1858
988174c1 1859#if defined(HAS_HTOVS) && !defined(htovs)
1109a392 1860HTOLE(htovs,short)
988174c1
LW
1861#endif
1862#if defined(HAS_HTOVL) && !defined(htovl)
1109a392 1863HTOLE(htovl,long)
988174c1
LW
1864#endif
1865#if defined(HAS_VTOHS) && !defined(vtohs)
1109a392 1866LETOH(vtohs,short)
988174c1
LW
1867#endif
1868#if defined(HAS_VTOHL) && !defined(vtohl)
1109a392
MHM
1869LETOH(vtohl,long)
1870#endif
1871
1872#ifdef PERL_NEED_MY_HTOLE16
1873# if U16SIZE == 2
1874HTOLE(Perl_my_htole16,U16)
1875# else
1876NOT_AVAIL(Perl_my_htole16,U16)
1877# endif
1878#endif
1879#ifdef PERL_NEED_MY_LETOH16
1880# if U16SIZE == 2
1881LETOH(Perl_my_letoh16,U16)
1882# else
1883NOT_AVAIL(Perl_my_letoh16,U16)
1884# endif
1885#endif
1886#ifdef PERL_NEED_MY_HTOBE16
1887# if U16SIZE == 2
1888HTOBE(Perl_my_htobe16,U16)
1889# else
1890NOT_AVAIL(Perl_my_htobe16,U16)
1891# endif
1892#endif
1893#ifdef PERL_NEED_MY_BETOH16
1894# if U16SIZE == 2
1895BETOH(Perl_my_betoh16,U16)
1896# else
1897NOT_AVAIL(Perl_my_betoh16,U16)
1898# endif
1899#endif
1900
1901#ifdef PERL_NEED_MY_HTOLE32
1902# if U32SIZE == 4
1903HTOLE(Perl_my_htole32,U32)
1904# else
1905NOT_AVAIL(Perl_my_htole32,U32)
1906# endif
1907#endif
1908#ifdef PERL_NEED_MY_LETOH32
1909# if U32SIZE == 4
1910LETOH(Perl_my_letoh32,U32)
1911# else
1912NOT_AVAIL(Perl_my_letoh32,U32)
1913# endif
1914#endif
1915#ifdef PERL_NEED_MY_HTOBE32
1916# if U32SIZE == 4
1917HTOBE(Perl_my_htobe32,U32)
1918# else
1919NOT_AVAIL(Perl_my_htobe32,U32)
1920# endif
1921#endif
1922#ifdef PERL_NEED_MY_BETOH32
1923# if U32SIZE == 4
1924BETOH(Perl_my_betoh32,U32)
1925# else
1926NOT_AVAIL(Perl_my_betoh32,U32)
1927# endif
1928#endif
1929
1930#ifdef PERL_NEED_MY_HTOLE64
1931# if U64SIZE == 8
1932HTOLE(Perl_my_htole64,U64)
1933# else
1934NOT_AVAIL(Perl_my_htole64,U64)
1935# endif
1936#endif
1937#ifdef PERL_NEED_MY_LETOH64
1938# if U64SIZE == 8
1939LETOH(Perl_my_letoh64,U64)
1940# else
1941NOT_AVAIL(Perl_my_letoh64,U64)
1942# endif
1943#endif
1944#ifdef PERL_NEED_MY_HTOBE64
1945# if U64SIZE == 8
1946HTOBE(Perl_my_htobe64,U64)
1947# else
1948NOT_AVAIL(Perl_my_htobe64,U64)
1949# endif
1950#endif
1951#ifdef PERL_NEED_MY_BETOH64
1952# if U64SIZE == 8
1953BETOH(Perl_my_betoh64,U64)
1954# else
1955NOT_AVAIL(Perl_my_betoh64,U64)
1956# endif
988174c1 1957#endif
a687059c 1958
1109a392
MHM
1959#ifdef PERL_NEED_MY_HTOLES
1960HTOLE(Perl_my_htoles,short)
1961#endif
1962#ifdef PERL_NEED_MY_LETOHS
1963LETOH(Perl_my_letohs,short)
1964#endif
1965#ifdef PERL_NEED_MY_HTOBES
1966HTOBE(Perl_my_htobes,short)
1967#endif
1968#ifdef PERL_NEED_MY_BETOHS
1969BETOH(Perl_my_betohs,short)
1970#endif
1971
1972#ifdef PERL_NEED_MY_HTOLEI
1973HTOLE(Perl_my_htolei,int)
1974#endif
1975#ifdef PERL_NEED_MY_LETOHI
1976LETOH(Perl_my_letohi,int)
1977#endif
1978#ifdef PERL_NEED_MY_HTOBEI
1979HTOBE(Perl_my_htobei,int)
1980#endif
1981#ifdef PERL_NEED_MY_BETOHI
1982BETOH(Perl_my_betohi,int)
1983#endif
1984
1985#ifdef PERL_NEED_MY_HTOLEL
1986HTOLE(Perl_my_htolel,long)
1987#endif
1988#ifdef PERL_NEED_MY_LETOHL
1989LETOH(Perl_my_letohl,long)
1990#endif
1991#ifdef PERL_NEED_MY_HTOBEL
1992HTOBE(Perl_my_htobel,long)
1993#endif
1994#ifdef PERL_NEED_MY_BETOHL
1995BETOH(Perl_my_betohl,long)
1996#endif
1997
1998void
1999Perl_my_swabn(void *ptr, int n)
2000{
2001 register char *s = (char *)ptr;
2002 register char *e = s + (n-1);
2003 register char tc;
2004
2005 for (n /= 2; n > 0; s++, e--, n--) {
2006 tc = *s;
2007 *s = *e;
2008 *e = tc;
2009 }
2010}
2011
4a7d1889
NIS
2012PerlIO *
2013Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2014{
2986a63f 2015#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS
2016 int p[2];
2017 register I32 This, that;
2018 register Pid_t pid;
2019 SV *sv;
2020 I32 did_pipes = 0;
2021 int pp[2];
2022
2023 PERL_FLUSHALL_FOR_CHILD;
2024 This = (*mode == 'w');
2025 that = !This;
2026 if (PL_tainting) {
2027 taint_env();
2028 taint_proper("Insecure %s%s", "EXEC");
2029 }
2030 if (PerlProc_pipe(p) < 0)
2031 return Nullfp;
2032 /* Try for another pipe pair for error return */
2033 if (PerlProc_pipe(pp) >= 0)
2034 did_pipes = 1;
52e18b1f 2035 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2036 if (errno != EAGAIN) {
2037 PerlLIO_close(p[This]);
4e6dfe71 2038 PerlLIO_close(p[that]);
1f852d0d
NIS
2039 if (did_pipes) {
2040 PerlLIO_close(pp[0]);
2041 PerlLIO_close(pp[1]);
2042 }
2043 return Nullfp;
2044 }
2045 sleep(5);
2046 }
2047 if (pid == 0) {
2048 /* Child */
1f852d0d
NIS
2049#undef THIS
2050#undef THAT
2051#define THIS that
2052#define THAT This
1f852d0d
NIS
2053 /* Close parent's end of error status pipe (if any) */
2054 if (did_pipes) {
2055 PerlLIO_close(pp[0]);
2056#if defined(HAS_FCNTL) && defined(F_SETFD)
2057 /* Close error pipe automatically if exec works */
2058 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2059#endif
2060 }
2061 /* Now dup our end of _the_ pipe to right position */
2062 if (p[THIS] != (*mode == 'r')) {
2063 PerlLIO_dup2(p[THIS], *mode == 'r');
2064 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2065 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2066 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2067 }
4e6dfe71
GS
2068 else
2069 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS
2070#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2071 /* No automatic close - do it by hand */
b7953727
JH
2072# ifndef NOFILE
2073# define NOFILE 20
2074# endif
a080fe3d
NIS
2075 {
2076 int fd;
2077
2078 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2079 if (fd != pp[1])
a080fe3d
NIS
2080 PerlLIO_close(fd);
2081 }
1f852d0d
NIS
2082 }
2083#endif
2084 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
2085 PerlProc__exit(1);
2086#undef THIS
2087#undef THAT
2088 }
2089 /* Parent */
52e18b1f 2090 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
2091 if (did_pipes)
2092 PerlLIO_close(pp[1]);
2093 /* Keep the lower of the two fd numbers */
2094 if (p[that] < p[This]) {
2095 PerlLIO_dup2(p[This], p[that]);
2096 PerlLIO_close(p[This]);
2097 p[This] = p[that];
2098 }
4e6dfe71
GS
2099 else
2100 PerlLIO_close(p[that]); /* close child's end of pipe */
2101
1f852d0d
NIS
2102 LOCK_FDPID_MUTEX;
2103 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2104 UNLOCK_FDPID_MUTEX;
862a34c6 2105 SvUPGRADE(sv,SVt_IV);
45977657 2106 SvIV_set(sv, pid);
1f852d0d
NIS
2107 PL_forkprocess = pid;
2108 /* If we managed to get status pipe check for exec fail */
2109 if (did_pipes && pid > 0) {
2110 int errkid;
2111 int n = 0, n1;
2112
2113 while (n < sizeof(int)) {
2114 n1 = PerlLIO_read(pp[0],
2115 (void*)(((char*)&errkid)+n),
2116 (sizeof(int)) - n);
2117 if (n1 <= 0)
2118 break;
2119 n += n1;
2120 }
2121 PerlLIO_close(pp[0]);
2122 did_pipes = 0;
2123 if (n) { /* Error */
2124 int pid2, status;
8c51524e 2125 PerlLIO_close(p[This]);
1f852d0d
NIS
2126 if (n != sizeof(int))
2127 Perl_croak(aTHX_ "panic: kid popen errno read");
2128 do {
2129 pid2 = wait4pid(pid, &status, 0);
2130 } while (pid2 == -1 && errno == EINTR);
2131 errno = errkid; /* Propagate errno from kid */
2132 return Nullfp;
2133 }
2134 }
2135 if (did_pipes)
2136 PerlLIO_close(pp[0]);
2137 return PerlIO_fdopen(p[This], mode);
2138#else
4a7d1889
NIS
2139 Perl_croak(aTHX_ "List form of piped open not implemented");
2140 return (PerlIO *) NULL;
1f852d0d 2141#endif
4a7d1889
NIS
2142}
2143
5f05dabc 2144 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2145#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2146PerlIO *
3dd43144 2147Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c
LW
2148{
2149 int p[2];
8ac85365 2150 register I32 This, that;
d8a83dd3 2151 register Pid_t pid;
79072805 2152 SV *sv;
bfce84ec 2153 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2154 I32 did_pipes = 0;
2155 int pp[2];
a687059c 2156
45bc9206 2157 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2158#ifdef OS2
2159 if (doexec) {
23da6c43 2160 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2161 }
a1d180c4 2162#endif
8ac85365
NIS
2163 This = (*mode == 'w');
2164 that = !This;
3280af22 2165 if (doexec && PL_tainting) {
bbce6d69
PP
2166 taint_env();
2167 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2168 }
c2267164
IZ
2169 if (PerlProc_pipe(p) < 0)
2170 return Nullfp;
e446cec8
IZ
2171 if (doexec && PerlProc_pipe(pp) >= 0)
2172 did_pipes = 1;
52e18b1f 2173 while ((pid = PerlProc_fork()) < 0) {
a687059c 2174 if (errno != EAGAIN) {
6ad3d225 2175 PerlLIO_close(p[This]);
b5ac89c3 2176 PerlLIO_close(p[that]);
e446cec8
IZ
2177 if (did_pipes) {
2178 PerlLIO_close(pp[0]);
2179 PerlLIO_close(pp[1]);
2180 }
a687059c 2181 if (!doexec)
cea2e8a9 2182 Perl_croak(aTHX_ "Can't fork");
a687059c
LW
2183 return Nullfp;
2184 }
2185 sleep(5);
2186 }
2187 if (pid == 0) {
79072805
LW
2188 GV* tmpgv;
2189
30ac6d9b
GS
2190#undef THIS
2191#undef THAT
a687059c 2192#define THIS that
8ac85365 2193#define THAT This
e446cec8
IZ
2194 if (did_pipes) {
2195 PerlLIO_close(pp[0]);
2196#if defined(HAS_FCNTL) && defined(F_SETFD)
2197 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2198#endif
2199 }
a687059c 2200 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2201 PerlLIO_dup2(p[THIS], *mode == 'r');
2202 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2203 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2204 PerlLIO_close(p[THAT]);
a687059c 2205 }
b5ac89c3
NIS
2206 else
2207 PerlLIO_close(p[THAT]);
4435c477 2208#ifndef OS2
a687059c 2209 if (doexec) {
a0d0e21e 2210#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2211#ifndef NOFILE
2212#define NOFILE 20
2213#endif
a080fe3d 2214 {
3aed30dc 2215 int fd;
a080fe3d
NIS
2216
2217 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2218 if (fd != pp[1])
3aed30dc 2219 PerlLIO_close(fd);
a080fe3d 2220 }
ae986130 2221#endif
a080fe3d
NIS
2222 /* may or may not use the shell */
2223 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2224 PerlProc__exit(1);
a687059c 2225 }
4435c477 2226#endif /* defined OS2 */
306196c3 2227 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4d76a344 2228 SvREADONLY_off(GvSV(tmpgv));
7766f137 2229 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
4d76a344
RGS
2230 SvREADONLY_on(GvSV(tmpgv));
2231 }
2232#ifdef THREADS_HAVE_PIDS
2233 PL_ppid = (IV)getppid();
2234#endif
3280af22 2235 PL_forkprocess = 0;
ca0c25f6 2236#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2237 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2238#endif
a687059c
LW
2239 return Nullfp;
2240#undef THIS
2241#undef THAT
2242 }
b5ac89c3 2243 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ
2244 if (did_pipes)
2245 PerlLIO_close(pp[1]);
8ac85365 2246 if (p[that] < p[This]) {
6ad3d225
GS
2247 PerlLIO_dup2(p[This], p[that]);
2248 PerlLIO_close(p[This]);
8ac85365 2249 p[This] = p[that];
62b28dd9 2250 }
b5ac89c3
NIS
2251 else
2252 PerlLIO_close(p[that]);
2253
4755096e 2254 LOCK_FDPID_MUTEX;
3280af22 2255 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2256 UNLOCK_FDPID_MUTEX;
862a34c6 2257 SvUPGRADE(sv,SVt_IV);
45977657 2258 SvIV_set(sv, pid);
3280af22 2259 PL_forkprocess = pid;
e446cec8
IZ
2260 if (did_pipes && pid > 0) {
2261 int errkid;
2262 int n = 0, n1;
2263
2264 while (n < sizeof(int)) {
2265 n1 = PerlLIO_read(pp[0],
2266 (void*)(((char*)&errkid)+n),
2267 (sizeof(int)) - n);
2268 if (n1 <= 0)
2269 break;
2270 n += n1;
2271 }
2f96c702
IZ
2272 PerlLIO_close(pp[0]);
2273 did_pipes = 0;
e446cec8 2274 if (n) { /* Error */
faa466a7 2275 int pid2, status;
8c51524e 2276 PerlLIO_close(p[This]);
e446cec8 2277 if (n != sizeof(int))
cea2e8a9 2278 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG
2279 do {
2280 pid2 = wait4pid(pid, &status, 0);
2281 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ
2282 errno = errkid; /* Propagate errno from kid */
2283 return Nullfp;
2284 }
2285 }
2286 if (did_pipes)
2287 PerlLIO_close(pp[0]);
8ac85365 2288 return PerlIO_fdopen(p[This], mode);
a687059c 2289}
7c0587c8 2290#else
85ca448a 2291#if defined(atarist) || defined(EPOC)
7c0587c8 2292FILE *popen();
760ac839 2293PerlIO *
864dbfa3 2294Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2295{
45bc9206 2296 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS
2297 /* Call system's popen() to get a FILE *, then import it.
2298 used 0 for 2nd parameter to PerlIO_importFILE;
2299 apparently not used
2300 */
2301 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2302}
2b96b0a5
JH
2303#else
2304#if defined(DJGPP)
2305FILE *djgpp_popen();
2306PerlIO *
2307Perl_my_popen(pTHX_ char *cmd, char *mode)
2308{
2309 PERL_FLUSHALL_FOR_CHILD;
2310 /* Call system's popen() to get a FILE *, then import it.
2311 used 0 for 2nd parameter to PerlIO_importFILE;
2312 apparently not used
2313 */
2314 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2315}
2316#endif
7c0587c8
LW
2317#endif
2318
2319#endif /* !DOSISH */
a687059c 2320
52e18b1f
GS
2321/* this is called in parent before the fork() */
2322void
2323Perl_atfork_lock(void)
2324{
27da23d5 2325 dVAR;
3db8f154 2326#if defined(USE_ITHREADS)
52e18b1f
GS
2327 /* locks must be held in locking order (if any) */
2328# ifdef MYMALLOC
2329 MUTEX_LOCK(&PL_malloc_mutex);
2330# endif
2331 OP_REFCNT_LOCK;
2332#endif
2333}
2334
2335/* this is called in both parent and child after the fork() */
2336void
2337Perl_atfork_unlock(void)
2338{
27da23d5 2339 dVAR;
3db8f154 2340#if defined(USE_ITHREADS)
52e18b1f
GS
2341 /* locks must be released in same order as in atfork_lock() */
2342# ifdef MYMALLOC
2343 MUTEX_UNLOCK(&PL_malloc_mutex);
2344# endif
2345 OP_REFCNT_UNLOCK;
2346#endif
2347}
2348
2349Pid_t
2350Perl_my_fork(void)
2351{
2352#if defined(HAS_FORK)
2353 Pid_t pid;
3db8f154 2354#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2355 atfork_lock();
2356 pid = fork();
2357 atfork_unlock();
2358#else
2359 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2360 * handlers elsewhere in the code */
2361 pid = fork();
2362#endif
2363 return pid;
2364#else
2365 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2366 Perl_croak_nocontext("fork() not available");
b961a566 2367 return 0;
52e18b1f
GS
2368#endif /* HAS_FORK */
2369}
2370
748a9306 2371#ifdef DUMP_FDS
35ff7856 2372void
864dbfa3 2373Perl_dump_fds(pTHX_ char *s)
ae986130
LW
2374{
2375 int fd;
c623ac67 2376 Stat_t tmpstatbuf;
ae986130 2377
bf49b057 2378 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2379 for (fd = 0; fd < 32; fd++) {
6ad3d225 2380 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2381 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2382 }
bf49b057 2383 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2384 return;
ae986130 2385}
35ff7856 2386#endif /* DUMP_FDS */
ae986130 2387
fe14fcc3 2388#ifndef HAS_DUP2
fec02dd3 2389int
ba106d47 2390dup2(int oldfd, int newfd)
a687059c 2391{
a0d0e21e 2392#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2393 if (oldfd == newfd)
2394 return oldfd;
6ad3d225 2395 PerlLIO_close(newfd);
fec02dd3 2396 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2397#else
fc36a67e
PP
2398#define DUP2_MAX_FDS 256
2399 int fdtmp[DUP2_MAX_FDS];
79072805 2400 I32 fdx = 0;
ae986130
LW
2401 int fd;
2402
fe14fcc3 2403 if (oldfd == newfd)
fec02dd3 2404 return oldfd;
6ad3d225 2405 PerlLIO_close(newfd);
fc36a67e 2406 /* good enough for low fd's... */
6ad3d225 2407 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2408 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2409 PerlLIO_close(fd);
fc36a67e
PP
2410 fd = -1;
2411 break;
2412 }
ae986130 2413 fdtmp[fdx++] = fd;
fc36a67e 2414 }
ae986130 2415 while (fdx > 0)
6ad3d225 2416 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2417 return fd;
62b28dd9 2418#endif
a687059c
LW
2419}
2420#endif
2421
64ca3a65 2422#ifndef PERL_MICRO
ff68c719
PP
2423#ifdef HAS_SIGACTION
2424
abea2c45
HS
2425#ifdef MACOS_TRADITIONAL
2426/* We don't want restart behavior on MacOS */
2427#undef SA_RESTART
2428#endif
2429
ff68c719 2430Sighandler_t
864dbfa3 2431Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2432{
27da23d5 2433 dVAR;
ff68c719
PP
2434 struct sigaction act, oact;
2435
a10b1e10
JH
2436#ifdef USE_ITHREADS
2437 /* only "parent" interpreter can diddle signals */
2438 if (PL_curinterp != aTHX)
8aad04aa 2439 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2440#endif
2441
8aad04aa 2442 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2443 sigemptyset(&act.sa_mask);
2444 act.sa_flags = 0;
2445#ifdef SA_RESTART
4ffa73a3
JH
2446 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2447 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2448#endif
358837b8 2449#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2450 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2451 act.sa_flags |= SA_NOCLDWAIT;
2452#endif
ff68c719 2453 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2454 return (Sighandler_t) SIG_ERR;
ff68c719 2455 else
8aad04aa 2456 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2457}
2458
2459Sighandler_t
864dbfa3 2460Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2461{
2462 struct sigaction oact;
2463
2464 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2465 return (Sighandler_t) SIG_ERR;
ff68c719 2466 else
8aad04aa 2467 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2468}
2469
2470int
864dbfa3 2471Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2472{
27da23d5 2473 dVAR;
ff68c719
PP
2474 struct sigaction act;
2475
a10b1e10
JH
2476#ifdef USE_ITHREADS
2477 /* only "parent" interpreter can diddle signals */
2478 if (PL_curinterp != aTHX)
2479 return -1;
2480#endif
2481
8aad04aa 2482 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2483 sigemptyset(&act.sa_mask);
2484 act.sa_flags = 0;
2485#ifdef SA_RESTART
4ffa73a3
JH
2486 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2487 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2488#endif
36b5d377 2489#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2490 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2491 act.sa_flags |= SA_NOCLDWAIT;
2492#endif
ff68c719
PP
2493 return sigaction(signo, &act, save);
2494}
2495
2496int
864dbfa3 2497Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2498{
27da23d5 2499 dVAR;
a10b1e10
JH
2500#ifdef USE_ITHREADS
2501 /* only "parent" interpreter can diddle signals */
2502 if (PL_curinterp != aTHX)
2503 return -1;
2504#endif
2505
ff68c719
PP
2506 return sigaction(signo, save, (struct sigaction *)NULL);
2507}
2508
2509#else /* !HAS_SIGACTION */
2510
2511Sighandler_t
864dbfa3 2512Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2513{
39f1703b 2514#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2515 /* only "parent" interpreter can diddle signals */
2516 if (PL_curinterp != aTHX)
8aad04aa 2517 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2518#endif
2519
6ad3d225 2520 return PerlProc_signal(signo, handler);
ff68c719
PP
2521}
2522
ff68c719
PP
2523static
2524Signal_t
4e35701f 2525sig_trap(int signo)
ff68c719 2526{
27da23d5
JH
2527 dVAR;
2528 PL_sig_trapped++;
ff68c719
PP
2529}
2530
2531Sighandler_t
864dbfa3 2532Perl_rsignal_state(pTHX_ int signo)
ff68c719 2533{
27da23d5 2534 dVAR;
ff68c719
PP
2535 Sighandler_t oldsig;
2536
39f1703b 2537#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2538 /* only "parent" interpreter can diddle signals */
2539 if (PL_curinterp != aTHX)
8aad04aa 2540 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2541#endif
2542
27da23d5 2543 PL_sig_trapped = 0;
6ad3d225
GS
2544 oldsig = PerlProc_signal(signo, sig_trap);
2545 PerlProc_signal(signo, oldsig);
27da23d5 2546 if (PL_sig_trapped)
3aed30dc 2547 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2548 return oldsig;
2549}
2550
2551int
864dbfa3 2552Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2553{
39f1703b 2554#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2555 /* only "parent" interpreter can diddle signals */
2556 if (PL_curinterp != aTHX)
2557 return -1;
2558#endif
6ad3d225 2559 *save = PerlProc_signal(signo, handler);
8aad04aa 2560 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2561}
2562
2563int
864dbfa3 2564Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2565{
39f1703b 2566#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2567 /* only "parent" interpreter can diddle signals */
2568 if (PL_curinterp != aTHX)
2569 return -1;
2570#endif
8aad04aa 2571 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2572}
2573
2574#endif /* !HAS_SIGACTION */
64ca3a65 2575#endif /* !PERL_MICRO */
ff68c719 2576
5f05dabc 2577 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2578#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2579I32
864dbfa3 2580Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2581{
ff68c719 2582 Sigsave_t hstat, istat, qstat;
a687059c 2583 int status;
a0d0e21e 2584 SV **svp;
d8a83dd3
JH
2585 Pid_t pid;
2586 Pid_t pid2;
03136e13 2587 bool close_failed;
b7953727 2588 int saved_errno = 0;
22fae026
TM
2589#ifdef WIN32
2590 int saved_win32_errno;
2591#endif
a687059c 2592
4755096e 2593 LOCK_FDPID_MUTEX;
3280af22 2594 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2595 UNLOCK_FDPID_MUTEX;
25d92023 2596 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2597 SvREFCNT_dec(*svp);
3280af22 2598 *svp = &PL_sv_undef;
ddcf38b7
IZ
2599#ifdef OS2
2600 if (pid == -1) { /* Opened by popen. */
2601 return my_syspclose(ptr);
2602 }
a1d180c4 2603#endif
03136e13
CS
2604 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2605 saved_errno = errno;
22fae026
TM
2606#ifdef WIN32
2607 saved_win32_errno = GetLastError();
2608#endif
03136e13 2609 }
7c0587c8 2610#ifdef UTS
6ad3d225 2611 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2612#endif
64ca3a65 2613#ifndef PERL_MICRO
8aad04aa
JH
2614 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2615 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2616 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 2617#endif
748a9306 2618 do {
1d3434b8
GS
2619 pid2 = wait4pid(pid, &status, 0);
2620 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2621#ifndef PERL_MICRO
ff68c719
PP
2622 rsignal_restore(SIGHUP, &hstat);
2623 rsignal_restore(SIGINT, &istat);
2624 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2625#endif
03136e13 2626 if (close_failed) {
ce6e1103 2627 SETERRNO(saved_errno, 0);
03136e13
CS
2628 return -1;
2629 }
1d3434b8 2630 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2631}
4633a7c4
LW
2632#endif /* !DOSISH */
2633
2986a63f 2634#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2635I32
d8a83dd3 2636Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2637{
27da23d5 2638 I32 result = 0;
b7953727
JH
2639 if (!pid)
2640 return -1;
ca0c25f6 2641#ifdef PERL_USES_PL_PIDSTATUS
b7953727 2642 {
3aed30dc 2643 if (pid > 0) {
12072db5
NC
2644 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2645 pid, rather than a string form. */
c4420975 2646 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS
2647 if (svp && *svp != &PL_sv_undef) {
2648 *statusp = SvIVX(*svp);
12072db5
NC
2649 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2650 G_DISCARD);
3aed30dc
HS
2651 return pid;
2652 }
2653 }
2654 else {
2655 HE *entry;
2656
2657 hv_iterinit(PL_pidstatus);
2658 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 2659 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 2660 I32 len;
12072db5 2661 const char *spid = hv_iterkey(entry,&len);
27da23d5 2662
12072db5
NC
2663 assert (len == sizeof(Pid_t));
2664 memcpy((char *)&pid, spid, len);
3aed30dc 2665 *statusp = SvIVX(sv);
7b9a3241
NC
2666 /* The hash iterator is currently on this entry, so simply
2667 calling hv_delete would trigger the lazy delete, which on
2668 aggregate does more work, beacuse next call to hv_iterinit()
2669 would spot the flag, and have to call the delete routine,
2670 while in the meantime any new entries can't re-use that
2671 memory. */
2672 hv_iterinit(PL_pidstatus);
7ea75b61 2673 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS
2674 return pid;
2675 }
20188a90
LW
2676 }
2677 }
68a29c53 2678#endif
79072805 2679#ifdef HAS_WAITPID
367f3c24
IZ
2680# ifdef HAS_WAITPID_RUNTIME
2681 if (!HAS_WAITPID_RUNTIME)
2682 goto hard_way;
2683# endif
cddd4526 2684 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2685 goto finish;
367f3c24
IZ
2686#endif
2687#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
cddd4526 2688 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
dfcfdb64 2689 goto finish;
367f3c24 2690#endif
ca0c25f6 2691#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 2692#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 2693 hard_way:
27da23d5 2694#endif
a0d0e21e 2695 {
a0d0e21e 2696 if (flags)
cea2e8a9 2697 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2698 else {
76e3520e 2699 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
2700 pidgone(result,*statusp);
2701 if (result < 0)
2702 *statusp = -1;
2703 }
a687059c
LW
2704 }
2705#endif
27da23d5 2706#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 2707 finish:
27da23d5 2708#endif
cddd4526
NIS
2709 if (result < 0 && errno == EINTR) {
2710 PERL_ASYNC_CHECK();
2711 }
2712 return result;
a687059c 2713}
2986a63f 2714#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2715
ca0c25f6 2716#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 2717void
d8a83dd3 2718Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2719{
79072805 2720 register SV *sv;
a687059c 2721
12072db5 2722 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 2723 SvUPGRADE(sv,SVt_IV);
45977657 2724 SvIV_set(sv, status);
20188a90 2725 return;
a687059c 2726}
ca0c25f6 2727#endif
a687059c 2728
85ca448a 2729#if defined(atarist) || defined(OS2) || defined(EPOC)
7c0587c8 2730int pclose();
ddcf38b7
IZ
2731#ifdef HAS_FORK
2732int /* Cannot prototype with I32
2733 in os2ish.h. */
ba106d47 2734my_syspclose(PerlIO *ptr)
ddcf38b7 2735#else
79072805 2736I32
864dbfa3 2737Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2738#endif
a687059c 2739{
760ac839 2740 /* Needs work for PerlIO ! */
c4420975 2741 FILE * const f = PerlIO_findFILE(ptr);
760ac839 2742 I32 result = pclose(f);
2b96b0a5
JH
2743 PerlIO_releaseFILE(ptr,f);
2744 return result;
2745}
2746#endif
2747
933fea7f 2748#if defined(DJGPP)
2b96b0a5
JH
2749int djgpp_pclose();
2750I32
2751Perl_my_pclose(pTHX_ PerlIO *ptr)
2752{
2753 /* Needs work for PerlIO ! */
c4420975 2754 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 2755 I32 result = djgpp_pclose(f);
933fea7f 2756 result = (result << 8) & 0xff00;
760ac839
LW
2757 PerlIO_releaseFILE(ptr,f);
2758 return result;
a687059c 2759}
7c0587c8 2760#endif
9f68db38
LW
2761
2762void
864dbfa3 2763Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2764{
79072805 2765 register I32 todo;
c4420975 2766 register const char * const frombase = from;
9f68db38
LW
2767
2768 if (len == 1) {
08105a92 2769 register const char c = *from;
9f68db38 2770 while (count-- > 0)
5926133d 2771 *to++ = c;
9f68db38
LW
2772 return;
2773 }
2774 while (count-- > 0) {
2775 for (todo = len; todo > 0; todo--) {
2776 *to++ = *from++;
2777 }
2778 from = frombase;
2779 }
2780}
0f85fab0 2781
fe14fcc3 2782#ifndef HAS_RENAME
79072805 2783I32
4373e329 2784Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 2785{
93a17b20
LW
2786 char *fa = strrchr(a,'/');
2787 char *fb = strrchr(b,'/');
c623ac67
GS
2788 Stat_t tmpstatbuf1;
2789 Stat_t tmpstatbuf2;
c4420975 2790 SV * const tmpsv = sv_newmortal();
62b28dd9
LW
2791
2792 if (fa)
2793 fa++;
2794 else
2795 fa = a;
2796 if (fb)
2797 fb++;
2798 else
2799 fb = b;
2800 if (strNE(a,b))
2801 return FALSE;
2802 if (fa == a)
616d8c9c 2803 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2804 else
46fc3d4c 2805 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 2806 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
2807 return FALSE;
2808 if (fb == b)
616d8c9c 2809 sv_setpvn(tmpsv, ".", 1);
62b28dd9 2810 else
46fc3d4c 2811 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 2812 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
2813 return FALSE;
2814 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2815 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2816}
fe14fcc3
LW
2817#endif /* !HAS_RENAME */
2818
491527d0 2819char*
7f315aed
NC
2820Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
2821 const char *const *const search_ext, I32 flags)
491527d0 2822{
e1ec3a88 2823 const char *xfound = Nullch;
491527d0 2824 char *xfailed = Nullch;
0f31cffe 2825 char tmpbuf[MAXPATHLEN];
491527d0 2826 register char *s;
5f74f29c 2827 I32 len = 0;
491527d0
GS
2828 int retval;
2829#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2830# define SEARCH_EXTS ".bat", ".cmd", NULL
2831# define MAX_EXT_LEN 4
2832#endif
2833#ifdef OS2
2834# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2835# define MAX_EXT_LEN 4
2836#endif
2837#ifdef VMS
2838# define SEARCH_EXTS ".pl", ".com", NULL
2839# define MAX_EXT_LEN 4
2840#endif
2841 /* additional extensions to try in each dir if scriptname not found */
2842#ifdef SEARCH_EXTS
7f315aed
NC
2843 const char *const exts[] = { SEARCH_EXTS };
2844 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 2845 int extidx = 0, i = 0;
e1ec3a88 2846 const char *curext = Nullch;
491527d0 2847#else
53c1dcc0 2848 PERL_UNUSED_ARG(search_ext);
491527d0
GS
2849# define MAX_EXT_LEN 0
2850#endif
2851
2852 /*
2853 * If dosearch is true and if scriptname does not contain path
2854 * delimiters, search the PATH for scriptname.
2855 *
2856 * If SEARCH_EXTS is also defined, will look for each
2857 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2858 * while searching the PATH.
2859 *
2860 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2861 * proceeds as follows:
2862 * If DOSISH or VMSISH:
2863 * + look for ./scriptname{,.foo,.bar}
2864 * + search the PATH for scriptname{,.foo,.bar}
2865 *
2866 * If !DOSISH:
2867 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2868 * this will not look in '.' if it's not in the PATH)
2869 */
84486fc6 2870 tmpbuf[0] = '\0';
491527d0
GS
2871
2872#ifdef VMS
2873# ifdef ALWAYS_DEFTYPES
2874 len = strlen(scriptname);
2875 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 2876 int idx = 0, deftypes = 1;
491527d0
GS
2877 bool seen_dot = 1;
2878
c4420975 2879 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch);
491527d0
GS
2880# else
2881 if (dosearch) {
c4420975 2882 int idx = 0, deftypes = 1;
491527d0
GS
2883 bool seen_dot = 1;
2884
c4420975 2885 const int hasdir = (strpbrk(scriptname,":[</") != Nullch);
491527d0
GS
2886# endif
2887 /* The first time through, just add SEARCH_EXTS to whatever we
2888 * already have, so we can check for default file types. */
2889 while (deftypes ||
84486fc6 2890 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
2891 {
2892 if (deftypes) {
2893 deftypes = 0;
84486fc6 2894 *tmpbuf = '\0';
491527d0 2895 }
84486fc6
GS
2896 if ((strlen(tmpbuf) + strlen(scriptname)
2897 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2898 continue; /* don't search dir with too-long name */
84486fc6 2899 strcat(tmpbuf, scriptname);
491527d0
GS
2900#else /* !VMS */
2901
2902#ifdef DOSISH
2903 if (strEQ(scriptname, "-"))
2904 dosearch = 0;
2905 if (dosearch) { /* Look in '.' first. */
fe2774ed 2906 const char *cur = scriptname;
491527d0
GS
2907#ifdef SEARCH_EXTS
2908 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2909 while (ext[i])
2910 if (strEQ(ext[i++],curext)) {
2911 extidx = -1; /* already has an ext */
2912 break;
2913 }
2914 do {
2915#endif
2916 DEBUG_p(PerlIO_printf(Perl_debug_log,
2917 "Looking for %s\n",cur));
017f25f1
IZ
2918 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2919 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
2920 dosearch = 0;
2921 scriptname = cur;
2922#ifdef SEARCH_EXTS
2923 break;
2924#endif
2925 }
2926#ifdef SEARCH_EXTS
2927 if (cur == scriptname) {
2928 len = strlen(scriptname);
84486fc6 2929 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2930 break;
490a0e98 2931 /* FIXME? Convert to memcpy */
84486fc6 2932 cur = strcpy(tmpbuf, scriptname);
491527d0
GS
2933 }
2934 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2935 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS
2936#endif
2937 }
2938#endif
2939
cd39f2b6
JH
2940#ifdef MACOS_TRADITIONAL
2941 if (dosearch && !strchr(scriptname, ':') &&
2942 (s = PerlEnv_getenv("Commands")))
2943#else
491527d0
GS
2944 if (dosearch && !strchr(scriptname, '/')
2945#ifdef DOSISH
2946 && !strchr(scriptname, '\\')
2947#endif
cd39f2b6
JH
2948 && (s = PerlEnv_getenv("PATH")))
2949#endif
2950 {
491527d0 2951 bool seen_dot = 0;
92f0c265 2952
3280af22
NIS
2953 PL_bufend = s + strlen(s);
2954 while (s < PL_bufend) {
cd39f2b6
JH
2955#ifdef MACOS_TRADITIONAL
2956 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2957 ',',
2958 &len);
2959#else
491527d0
GS
2960#if defined(atarist) || defined(DOSISH)
2961 for (len = 0; *s
2962# ifdef atarist
2963 && *s != ','
2964# endif
2965 && *s != ';'; len++, s++) {
84486fc6
GS
2966 if (len < sizeof tmpbuf)
2967 tmpbuf[len] = *s;
491527d0 2968 }
84486fc6
GS
2969 if (len < sizeof tmpbuf)
2970 tmpbuf[len] = '\0';
491527d0 2971#else /* ! (atarist || DOSISH) */
3280af22 2972 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS
2973 ':',
2974 &len);
2975#endif /* ! (atarist || DOSISH) */
cd39f2b6 2976#endif /* MACOS_TRADITIONAL */
3280af22 2977 if (s < PL_bufend)
491527d0 2978 s++;
84486fc6 2979 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2980 continue; /* don't search dir with too-long name */
cd39f2b6
JH
2981#ifdef MACOS_TRADITIONAL
2982 if (len && tmpbuf[len - 1] != ':')
2983 tmpbuf[len++] = ':';
2984#else
491527d0 2985 if (len
490a0e98 2986# if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS
2987 && tmpbuf[len - 1] != '/'
2988 && tmpbuf[len - 1] != '\\'
490a0e98 2989# endif
491527d0 2990 )
84486fc6
GS
2991 tmpbuf[len++] = '/';
2992 if (len == 2 && tmpbuf[0] == '.')
491527d0 2993 seen_dot = 1;
cd39f2b6 2994#endif
490a0e98
NC
2995 /* FIXME? Convert to memcpy by storing previous strlen(scriptname)
2996 */
84486fc6 2997 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS
2998#endif /* !VMS */
2999
3000#ifdef SEARCH_EXTS
84486fc6 3001 len = strlen(tmpbuf);
491527d0
GS
3002 if (extidx > 0) /* reset after previous loop */
3003 extidx = 0;
3004 do {
3005#endif
84486fc6 3006 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3007 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
3008 if (S_ISDIR(PL_statbuf.st_mode)) {
3009 retval = -1;
3010 }
491527d0
GS
3011#ifdef SEARCH_EXTS
3012 } while ( retval < 0 /* not there */
3013 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 3014 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS
3015 );
3016#endif
3017 if (retval < 0)
3018 continue;
3280af22
NIS
3019 if (S_ISREG(PL_statbuf.st_mode)
3020 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3021#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3022 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
3023#endif
3024 )
3025 {
3aed30dc 3026 xfound = tmpbuf; /* bingo! */
491527d0
GS
3027 break;
3028 }
3029 if (!xfailed)
84486fc6 3030 xfailed = savepv(tmpbuf);
491527d0
GS
3031 }
3032#ifndef DOSISH
017f25f1 3033 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3034 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3035 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
3036#endif
3037 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
3038 if (!xfound) {
3039 if (flags & 1) { /* do or die? */
3aed30dc 3040 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3041 (xfailed ? "execute" : "find"),
3042 (xfailed ? xfailed : scriptname),
3043 (xfailed ? "" : " on PATH"),
3044 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3045 }
3046 scriptname = Nullch;
3047 }
43c5f42d 3048 Safefree(xfailed);
491527d0
GS
3049 scriptname = xfound;
3050 }
9ccb31f9 3051 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS
3052}
3053
ba869deb
GS
3054#ifndef PERL_GET_CONTEXT_DEFINED
3055
3056void *
3057Perl_get_context(void)
3058{
27da23d5 3059 dVAR;
3db8f154 3060#if defined(USE_ITHREADS)
ba869deb
GS
3061# ifdef OLD_PTHREADS_API
3062 pthread_addr_t t;
3063 if (pthread_getspecific(PL_thr_key, &t))
3064 Perl_croak_nocontext("panic: pthread_getspecific");
3065 return (void*)t;
3066# else
bce813aa 3067# ifdef I_MACH_CTHREADS
8b8b35ab 3068 return (void*)cthread_data(cthread_self());
bce813aa 3069# else
8b8b35ab
JH
3070 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3071# endif
c44d3fdb 3072# endif
ba869deb
GS
3073#else
3074 return (void*)NULL;
3075#endif
3076}
3077
3078void
3079Perl_set_context(void *t)
3080{
8772537c 3081 dVAR;
3db8f154 3082#if defined(USE_ITHREADS)
c44d3fdb
GS
3083# ifdef I_MACH_CTHREADS
3084 cthread_set_data(cthread_self(), t);
3085# else
ba869deb
GS
3086 if (pthread_setspecific(PL_thr_key, t))
3087 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3088# endif
b464bac0 3089#else
8772537c 3090 PERL_UNUSED_ARG(t);
ba869deb
GS
3091#endif
3092}
3093
3094#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3095
27da23d5 3096#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3097struct perl_vars *
864dbfa3 3098Perl_GetVars(pTHX)
22239a37 3099{
533c011a 3100 return &PL_Vars;
22239a37 3101}
31fb1209
NIS
3102#endif
3103
1cb0ed9b 3104char **
864dbfa3 3105Perl_get_op_names(pTHX)
31fb1209 3106{
27da23d5 3107 return (char **)PL_op_name;
31fb1209
NIS
3108}
3109
1cb0ed9b 3110char **
864dbfa3 3111Perl_get_op_descs(pTHX)
31fb1209 3112{
27da23d5 3113 return (char **)PL_op_desc;
31fb1209 3114}
9e6b2b00 3115
e1ec3a88 3116const char *
864dbfa3 3117Perl_get_no_modify(pTHX)
9e6b2b00 3118{
e1ec3a88 3119 return PL_no_modify;
9e6b2b00
GS
3120}
3121
3122U32 *
864dbfa3 3123Perl_get_opargs(pTHX)
9e6b2b00 3124{
27da23d5 3125 return (U32 *)PL_opargs;
9e6b2b00 3126}
51aa15f3 3127
0cb96387
GS
3128PPADDR_t*
3129Perl_get_ppaddr(pTHX)
3130{
27da23d5 3131 dVAR;
12ae5dfc 3132 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3133}
3134
a6c40364
GS
3135#ifndef HAS_GETENV_LEN
3136char *
bf4acbe4 3137Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3138{
8772537c 3139 char * const env_trans = PerlEnv_getenv(env_elem);
a6c40364
GS
3140 if (env_trans)
3141 *len = strlen(env_trans);
3142 return env_trans;
f675dbe5
CB
3143}
3144#endif
3145
dc9e4912
GS
3146
3147MGVTBL*
864dbfa3 3148Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3149{
27da23d5 3150 const MGVTBL* result = Null(MGVTBL*);
dc9e4912
GS
3151
3152 switch(vtbl_id) {
3153 case want_vtbl_sv:
3154 result = &PL_vtbl_sv;
3155 break;
3156 case want_vtbl_env:
3157 result = &PL_vtbl_env;
3158 break;
3159 case want_vtbl_envelem:
3160 result = &PL_vtbl_envelem;
3161 break;
3162 case want_vtbl_sig:
3163 result = &PL_vtbl_sig;
3164 break;
3165 case want_vtbl_sigelem:
3166 result = &PL_vtbl_sigelem;
3167 break;
3168 case want_vtbl_pack:
3169 result = &PL_vtbl_pack;
3170 break;
3171 case want_vtbl_packelem:
3172 result = &PL_vtbl_packelem;
3173 break;
3174 case want_vtbl_dbline:
3175 result = &PL_vtbl_dbline;
3176 break;
3177 case want_vtbl_isa:
3178 result = &PL_vtbl_isa;
3179 break;
3180 case want_vtbl_isaelem:
3181 result = &PL_vtbl_isaelem;
3182 break;
3183 case want_vtbl_arylen:
3184 result = &PL_vtbl_arylen;
3185 break;
3186 case want_vtbl_glob:
3187 result = &PL_vtbl_glob;
3188 break;
3189 case want_vtbl_mglob:
3190 result = &PL_vtbl_mglob;
3191 break;
3192 case want_vtbl_nkeys:
3193 result = &PL_vtbl_nkeys;
3194 break;
3195 case want_vtbl_taint:
3196 result = &PL_vtbl_taint;
3197 break;
3198 case want_vtbl_substr:
3199 result = &PL_vtbl_substr;
3200 break;
3201 case want_vtbl_vec:
3202 result = &PL_vtbl_vec;
3203 break;
3204 case want_vtbl_pos:
3205 result = &PL_vtbl_pos;
3206 break;
3207 case want_vtbl_bm:
3208 result = &PL_vtbl_bm;
3209 break;
3210 case want_vtbl_fm:
3211 result = &PL_vtbl_fm;
3212 break;
3213 case want_vtbl_uvar:
3214 result = &PL_vtbl_uvar;
3215 break;
dc9e4912
GS
3216 case want_vtbl_defelem:
3217 result = &PL_vtbl_defelem;
3218 break;
3219 case want_vtbl_regexp:
3220 result = &PL_vtbl_regexp;
3221 break;
3222 case want_vtbl_regdata:
3223 result = &PL_vtbl_regdata;
3224 break;
3225 case want_vtbl_regdatum:
3226 result = &PL_vtbl_regdatum;
3227 break;
3c90161d 3228#ifdef USE_LOCALE_COLLATE
dc9e4912
GS
3229 case want_vtbl_collxfrm:
3230 result = &PL_vtbl_collxfrm;
3231 break;
3c90161d 3232#endif
dc9e4912
GS
3233 case want_vtbl_amagic:
3234 result = &PL_vtbl_amagic;
3235 break;
3236 case want_vtbl_amagicelem:
3237 result = &PL_vtbl_amagicelem;
3238 break;
810b8aa5
GS
3239 case want_vtbl_backref:
3240 result = &PL_vtbl_backref;
3241 break;
7e8c5dac
HS
3242 case want_vtbl_utf8:
3243 result = &PL_vtbl_utf8;
3244 break;
dc9e4912 3245 }
27da23d5 3246 return (MGVTBL*)result;
dc9e4912
GS
3247}
3248
767df6a1 3249I32
864dbfa3 3250Perl_my_fflush_all(pTHX)
767df6a1 3251{
f800e14d 3252#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3253 return PerlIO_flush(NULL);
767df6a1 3254#else
8fbdfb7c 3255# if defined(HAS__FWALK)
f13a2bc0 3256 extern int fflush(FILE *);
74cac757
JH
3257 /* undocumented, unprototyped, but very useful BSDism */
3258 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3259 _fwalk(&fflush);
74cac757 3260 return 0;
8fa7f367 3261# else
8fbdfb7c 3262# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3263 long open_max = -1;
8fbdfb7c 3264# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3265 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3266# else
8fa7f367 3267# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3268 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH
3269# else
3270# ifdef FOPEN_MAX
74cac757 3271 open_max = FOPEN_MAX;
8fa7f367
JH
3272# else
3273# ifdef OPEN_MAX
74cac757 3274 open_max = OPEN_MAX;
8fa7f367
JH
3275# else
3276# ifdef _NFILE
d2201af2 3277 open_max = _NFILE;
8fa7f367
JH
3278# endif
3279# endif
74cac757 3280# endif
767df6a1
JH
3281# endif
3282# endif
767df6a1
JH
3283 if (open_max > 0) {
3284 long i;
3285 for (i = 0; i < open_max; i++)
d2201af2
AD
3286 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3287 STDIO_STREAM_ARRAY[i]._file < open_max &&
3288 STDIO_STREAM_ARRAY[i]._flag)
3289 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH
3290 return 0;
3291 }
8fbdfb7c 3292# endif
93189314 3293 SETERRNO(EBADF,RMS_IFI);
767df6a1 3294 return EOF;
74cac757 3295# endif
767df6a1
JH
3296#endif
3297}
097ee67d 3298
69282e91 3299void
e1ec3a88 3300Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
bc37a18f 3301{
b64e5050 3302 const char * const func =
66fc2fa5
JH
3303 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3304 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f 3305 PL_op_desc[op];
b64e5050
AL
3306 const char * const pars = OP_IS_FILETEST(op) ? "" : "()";
3307 const char * const type = OP_IS_SOCKET(op)
3aed30dc
HS
3308 || (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
3309 ? "socket" : "filehandle";
b64e5050 3310 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
66fc2fa5 3311
4c80c0b2 3312 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3aed30dc 3313 if (ckWARN(WARN_IO)) {
b64e5050 3314 const char * const direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
3aed30dc
HS
3315 if (name && *name)
3316 Perl_warner(aTHX_ packWARN(WARN_IO),
3317 "Filehandle %s opened only for %sput",
fd322ea4 3318 name, direction);
3aed30dc
HS
3319 else
3320 Perl_warner(aTHX_ packWARN(WARN_IO),
fd322ea4 3321 "Filehandle opened only for %sput", direction);
3aed30dc 3322 }
2dd78f96
JH
3323 }
3324 else {
e1ec3a88 3325 const char *vile;
3aed30dc
HS
3326 I32 warn_type;
3327
3328 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3329 vile = "closed";
3330 warn_type = WARN_CLOSED;
3331 }
3332 else {
3333 vile = "unopened";
3334 warn_type = WARN_UNOPENED;
3335 }
3336
3337 if (ckWARN(warn_type)) {
3338 if (name && *name) {
3339 Perl_warner(aTHX_ packWARN(warn_type),
3340 "%s%s on %s %s %s", func, pars, vile, type, name);
3341 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3342 Perl_warner(
3343 aTHX_ packWARN(warn_type),
3344 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3345 func, pars, name
3346 );
3347 }
3348 else {
3349 Perl_warner(aTHX_ packWARN(warn_type),
3350 "%s%s on %s %s", func, pars, vile, type);
3351 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3352 Perl_warner(
3353 aTHX_ packWARN(warn_type),
3354 "\t(Are you trying to call %s%s on dirhandle?)\n",
3355 func, pars
3356 );
3357 }
3358 }
bc37a18f 3359 }
69282e91 3360}
a926ef6b
JH
3361
3362#ifdef EBCDIC
cbebf344
JH
3363/* in ASCII order, not that it matters */
3364static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3365
a926ef6b
JH
3366int
3367Perl_ebcdic_control(pTHX_ int ch)
3368{
3aed30dc 3369 if (ch > 'a') {
e1ec3a88 3370 const char *ctlp;
3aed30dc
HS
3371
3372 if (islower(ch))
3373 ch = toupper(ch);
3374
3375 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3376 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
a926ef6b 3377 }
3aed30dc
HS
3378
3379 if (ctlp == controllablechars)
3380 return('\177'); /* DEL */
3381 else
3382 return((unsigned char)(ctlp - controllablechars - 1));
3383 } else { /* Want uncontrol */
3384 if (ch == '\177' || ch == -1)
3385 return('?');
3386 else if (ch == '\157')
3387 return('\177');
3388 else if (ch == '\174')
3389 return('\000');
3390 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3391 return('\036');
3392 else if (ch == '\155')
3393 return('\037');
3394 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3395 return(controllablechars[ch+1]);
3396 else
3397 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3398 }
a926ef6b
JH
3399}
3400#endif
e72cf795 3401
f6adc668 3402/* To workaround core dumps from the uninitialised tm_zone we get the
e72cf795
JH
3403 * system to give us a reasonable struct to copy. This fix means that
3404 * strftime uses the tm_zone and tm_gmtoff values returned by
3405 * localtime(time()). That should give the desired result most of the
3406 * time. But probably not always!
3407 *
f6adc668
JH
3408 * This does not address tzname aspects of NETaa14816.
3409 *
e72cf795 3410 */
f6adc668 3411
e72cf795
JH
3412#ifdef HAS_GNULIBC
3413# ifndef STRUCT_TM_HASZONE
3414# define STRUCT_TM_HASZONE
3415# endif
3416#endif
3417
f6adc668
JH
3418#ifdef STRUCT_TM_HASZONE /* Backward compat */
3419# ifndef HAS_TM_TM_ZONE
3420# define HAS_TM_TM_ZONE
3421# endif
3422#endif
3423
e72cf795 3424void
f1208910 3425Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795 3426{
f6adc668 3427#ifdef HAS_TM_TM_ZONE
e72cf795 3428 Time_t now;
1b6737cc 3429 const struct tm* my_tm;
e72cf795 3430 (void)time(&now);
82c57498 3431 my_tm = localtime(&now);
ca46b8ee
SP
3432 if (my_tm)
3433 Copy(my_tm, ptm, 1, struct tm);
1b6737cc
AL
3434#else
3435 PERL_UNUSED_ARG(ptm);
e72cf795
JH
3436#endif
3437}
3438
3439/*
3440 * mini_mktime - normalise struct tm values without the localtime()
3441 * semantics (and overhead) of mktime().
3442 */
3443void
f1208910 3444Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH
3445{
3446 int yearday;
3447 int secs;
3448 int month, mday, year, jday;
3449 int odd_cent, odd_year;
3450
3451#define DAYS_PER_YEAR 365
3452#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3453#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3454#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3455#define SECS_PER_HOUR (60*60)
3456#define SECS_PER_DAY (24*SECS_PER_HOUR)
3457/* parentheses deliberately absent on these two, otherwise they don't work */
3458#define MONTH_TO_DAYS 153/5
3459#define DAYS_TO_MONTH 5/153
3460/* offset to bias by March (month 4) 1st between month/mday & year finding */
3461#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3462/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3463#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3464
3465/*
3466 * Year/day algorithm notes:
3467 *
3468 * With a suitable offset for numeric value of the month, one can find
3469 * an offset into the year by considering months to have 30.6 (153/5) days,
3470 * using integer arithmetic (i.e., with truncation). To avoid too much
3471 * messing about with leap days, we consider January and February to be
3472 * the 13th and 14th month of the previous year. After that transformation,
3473 * we need the month index we use to be high by 1 from 'normal human' usage,
3474 * so the month index values we use run from 4 through 15.
3475 *
3476 * Given that, and the rules for the Gregorian calendar (leap years are those
3477 * divisible by 4 unless also divisible by 100, when they must be divisible
3478 * by 400 instead), we can simply calculate the number of days since some
3479 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3480 * the days we derive from our month index, and adding in the day of the
3481 * month. The value used here is not adjusted for the actual origin which
3482 * it normally would use (1 January A.D. 1), since we're not exposing it.
3483 * We're only building the value so we can turn around and get the
3484 * normalised values for the year, month, day-of-month, and day-of-year.
3485 *
3486 * For going backward, we need to bias the value we're using so that we find
3487 * the right year value. (Basically, we don't want the contribution of
3488 * March 1st to the number to apply while deriving the year). Having done
3489 * that, we 'count up' the contribution to the year number by accounting for
3490 * full quadracenturies (400-year periods) with their extra leap days, plus
3491 * the contribution from full centuries (to avoid counting in the lost leap
3492 * days), plus the contribution from full quad-years (to count in the normal
3493 * leap days), plus the leftover contribution from any non-leap years.
3494 * At this point, if we were working with an actual leap day, we'll have 0
3495 * days left over. This is also true for March 1st, however. So, we have
3496 * to special-case that result, and (earlier) keep track of the 'odd'
3497 * century and year contributions. If we got 4 extra centuries in a qcent,
3498 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3499 * Otherwise, we add back in the earlier bias we removed (the 123 from
3500 * figuring in March 1st), find the month index (integer division by 30.6),
3501 * and the remainder is the day-of-month. We then have to convert back to
3502 * 'real' months (including fixing January and February from being 14/15 in
3503 * the previous year to being in the proper year). After that, to get
3504 * tm_yday, we work with the normalised year and get a new yearday value for
3505 * January 1st, which we subtract from the yearday value we had earlier,
3506 * representing the date we've re-built. This is done from January 1
3507 * because tm_yday is 0-origin.
3508 *
3509 * Since POSIX time routines are only guaranteed to work for times since the
3510 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3511 * applies Gregorian calendar rules even to dates before the 16th century
3512 * doesn't bother me. Besides, you'd need cultural context for a given
3513 * date to know whether it was Julian or Gregorian calendar, and that's
3514 * outside the scope for this routine. Since we convert back based on the
3515 * same rules we used to build the yearday, you'll only get strange results
3516 * for input which needed normalising, or for the 'odd' century years which
3517 * were leap years in the Julian calander but not in the Gregorian one.
3518 * I can live with that.
3519 *
3520 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3521 * that's still outside the scope for POSIX time manipulation, so I don't
3522 * care.
3523 */
3524
3525 year = 1900 + ptm->tm_year;
3526 month = ptm->tm_mon;
3527 mday = ptm->tm_mday;
3528 /* allow given yday with no month & mday to dominate the result */
3529 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3530 month = 0;
3531 mday = 0;
3532 jday = 1 + ptm->tm_yday;
3533 }
3534 else {
3535 jday = 0;
3536 }
3537 if (month >= 2)
3538 month+=2;
3539 else
3540 month+=14, year--;
3541 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3542 yearday += month*MONTH_TO_DAYS + mday + jday;
3543 /*
3544 * Note that we don't know when leap-seconds were or will be,
3545 * so we have to trust the user if we get something which looks
3546 * like a sensible leap-second. Wild values for seconds will
3547 * be rationalised, however.
3548 */
3549 if ((unsigned) ptm->tm_sec <= 60) {
3550 secs = 0;
3551 }
3552 else {
3553 secs = ptm->tm_sec;
3554 ptm->tm_sec = 0;
3555 }
3556 secs += 60 * ptm->tm_min;
3557 secs += SECS_PER_HOUR * ptm->tm_hour;
3558 if (secs < 0) {
3559 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3560 /* got negative remainder, but need positive time */
3561 /* back off an extra day to compensate */
3562 yearday += (secs/SECS_PER_DAY)-1;
3563 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3564 }
3565 else {
3566 yearday += (secs/SECS_PER_DAY);
3567 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3568 }
3569 }
3570 else if (secs >= SECS_PER_DAY) {
3571 yearday += (secs/SECS_PER_DAY);
3572 secs %= SECS_PER_DAY;
3573 }
3574 ptm->tm_hour = secs/SECS_PER_HOUR;
3575 secs %= SECS_PER_HOUR;
3576 ptm->tm_min = secs/60;
3577 secs %= 60;
3578 ptm->tm_sec += secs;
3579 /* done with time of day effects */
3580 /*
3581 * The algorithm for yearday has (so far) left it high by 428.
3582 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3583 * bias it by 123 while trying to figure out what year it
3584 * really represents. Even with this tweak, the reverse
3585 * translation fails for years before A.D. 0001.
3586 * It would still fail for Feb 29, but we catch that one below.
3587 */
3588 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3589 yearday -= YEAR_ADJUST;
3590 year = (yearday / DAYS_PER_QCENT) * 400;
3591 yearday %= DAYS_PER_QCENT;
3592 odd_cent = yearday / DAYS_PER_CENT;
3593 year += odd_cent * 100;
3594 yearday %= DAYS_PER_CENT;
3595 year += (yearday / DAYS_PER_QYEAR) * 4;
3596 yearday %= DAYS_PER_QYEAR;
3597 odd_year = yearday / DAYS_PER_YEAR;
3598 year += odd_year;
3599 yearday %= DAYS_PER_YEAR;
3600 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3601 month = 1;
3602 yearday = 29;
3603 }
3604 else {
3605 yearday += YEAR_ADJUST; /* recover March 1st crock */
3606 month = yearday*DAYS_TO_MONTH;
3607 yearday -= month*MONTH_TO_DAYS;
3608 /* recover other leap-year adjustment */
3609 if (month > 13) {
3610 month-=14;
3611 year++;
3612 }
3613 else {
3614 month-=2;
3615 }
3616 }
3617 ptm->tm_year = year - 1900;
3618 if (yearday) {
3619 ptm->tm_mday = yearday;
3620 ptm->tm_mon = month;
3621 }
3622 else {
3623 ptm->tm_mday = 31;
3624 ptm->tm_mon = month - 1;
3625 }
3626 /* re-build yearday based on Jan 1 to get tm_yday */
3627 year--;
3628 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3629 yearday += 14*MONTH_TO_DAYS + 1;
3630 ptm->tm_yday = jday - yearday;
3631 /* fix tm_wday if not overridden by caller */
3632 if ((unsigned)ptm->tm_wday > 6)
3633 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3634}
b3c85772
JH
3635
3636char *
e1ec3a88 3637Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
b3c85772
JH
3638{
3639#ifdef HAS_STRFTIME
3640 char *buf;
3641 int buflen;
3642 struct tm mytm;
3643 int len;
3644
3645 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3646 mytm.tm_sec = sec;
3647 mytm.tm_min = min;
3648 mytm.tm_hour = hour;
3649 mytm.tm_mday = mday;
3650 mytm.tm_mon = mon;
3651 mytm.tm_year = year;
3652 mytm.tm_wday = wday;
3653 mytm.tm_yday = yday;
3654 mytm.tm_isdst = isdst;
3655 mini_mktime(&mytm);
c473feec
SR
3656 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3657#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3658 STMT_START {
3659 struct tm mytm2;
3660 mytm2 = mytm;
3661 mktime(&mytm2);
3662#ifdef HAS_TM_TM_GMTOFF
3663 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3664#endif
3665#ifdef HAS_TM_TM_ZONE
3666 mytm.tm_zone = mytm2.tm_zone;
3667#endif
3668 } STMT_END;
3669#endif
b3c85772 3670 buflen = 64;
a02a5408 3671 Newx(buf, buflen, char);
b3c85772
JH
3672 len = strftime(buf, buflen, fmt, &mytm);
3673 /*
877f6a72 3674 ** The following is needed to handle to the situation where
b3c85772
JH
3675 ** tmpbuf overflows. Basically we want to allocate a buffer
3676 ** and try repeatedly. The reason why it is so complicated
3677 ** is that getting a return value of 0 from strftime can indicate
3678 ** one of the following:
3679 ** 1. buffer overflowed,
3680 ** 2. illegal conversion specifier, or
3681 ** 3. the format string specifies nothing to be returned(not
3682 ** an error). This could be because format is an empty string
3683 ** or it specifies %p that yields an empty string in some locale.
3684 ** If there is a better way to make it portable, go ahead by
3685 ** all means.
3686 */
3687 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3688 return buf;
3689 else {
3690 /* Possibly buf overflowed - try again with a bigger buf */
e1ec3a88
AL