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a0d0e21e 1/* util.c
a687059c 2 *
bc89e66f 3 * Copyright (c) 1991-2001, Larry Wall
a687059c 4 *
d48672a2
LW
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8d063cd8 7 *
8d063cd8 8 */
a0d0e21e
LW
9
10/*
11 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
12 * not content." --Gandalf
13 */
8d063cd8 14
8d063cd8 15#include "EXTERN.h"
864dbfa3 16#define PERL_IN_UTIL_C
8d063cd8 17#include "perl.h"
62b28dd9 18
64ca3a65 19#ifndef PERL_MICRO
e1dfb34b 20#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
a687059c 21#include <signal.h>
62b28dd9 22#endif
a687059c 23
36477c24
PP
24#ifndef SIG_ERR
25# define SIG_ERR ((Sighandler_t) -1)
26#endif
64ca3a65 27#endif
36477c24 28
ff68c719
PP
29#ifdef I_SYS_WAIT
30# include <sys/wait.h>
31#endif
32
868439a2
JH
33#ifdef HAS_SELECT
34# ifdef I_SYS_SELECT
35# include <sys/select.h>
36# endif
37#endif
38
8d063cd8 39#define FLUSH
8d063cd8 40
a0d0e21e 41#ifdef LEAKTEST
a0d0e21e 42
8c52afec
IZ
43long xcount[MAXXCOUNT];
44long lastxcount[MAXXCOUNT];
45long xycount[MAXXCOUNT][MAXYCOUNT];
46long lastxycount[MAXXCOUNT][MAXYCOUNT];
47
a0d0e21e 48#endif
a863c7d1 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 {
bf49b057 86 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 87 my_exit(1);
4e35701f 88 return Nullch;
8d063cd8
LW
89 }
90 /*NOTREACHED*/
91}
92
f2517201 93/* paranoid version of system's realloc() */
8d063cd8 94
bd4080b3 95Malloc_t
4f63d024 96Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 97{
54aff467 98 dTHX;
bd4080b3 99 Malloc_t ptr;
9a34ef1d 100#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 101 Malloc_t PerlMem_realloc();
ecfc5424 102#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 103
a1d180c4 104#ifdef HAS_64K_LIMIT
5f05dabc 105 if (size > 0xffff) {
bf49b057 106 PerlIO_printf(Perl_error_log,
5f05dabc 107 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 108 my_exit(1);
5f05dabc 109 }
55497cff 110#endif /* HAS_64K_LIMIT */
7614df0c 111 if (!size) {
f2517201 112 safesysfree(where);
7614df0c
JD
113 return NULL;
114 }
115
378cc40b 116 if (!where)
f2517201 117 return safesysmalloc(size);
34de22dd
LW
118#ifdef DEBUGGING
119 if ((long)size < 0)
4f63d024 120 Perl_croak_nocontext("panic: realloc");
34de22dd 121#endif
12ae5dfc 122 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 123 PERL_ALLOC_CHECK(ptr);
a1d180c4 124
97835f67
JH
125 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
126 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 127
8d063cd8
LW
128 if (ptr != Nullch)
129 return ptr;
3280af22 130 else if (PL_nomemok)
7c0587c8 131 return Nullch;
8d063cd8 132 else {
bf49b057 133 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 134 my_exit(1);
4e35701f 135 return Nullch;
8d063cd8
LW
136 }
137 /*NOTREACHED*/
138}
139
f2517201 140/* safe version of system's free() */
8d063cd8 141
54310121 142Free_t
4f63d024 143Perl_safesysfree(Malloc_t where)
8d063cd8 144{
155aba94 145#ifdef PERL_IMPLICIT_SYS
54aff467 146 dTHX;
155aba94 147#endif
97835f67 148 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 149 if (where) {
de3bb511 150 /*SUPPRESS 701*/
6ad3d225 151 PerlMem_free(where);
378cc40b 152 }
8d063cd8
LW
153}
154
f2517201 155/* safe version of system's calloc() */
1050c9ca 156
bd4080b3 157Malloc_t
4f63d024 158Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 159{
54aff467 160 dTHX;
bd4080b3 161 Malloc_t ptr;
1050c9ca 162
55497cff 163#ifdef HAS_64K_LIMIT
5f05dabc 164 if (size * count > 0xffff) {
bf49b057 165 PerlIO_printf(Perl_error_log,
5f05dabc 166 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 167 my_exit(1);
5f05dabc 168 }
55497cff 169#endif /* HAS_64K_LIMIT */
1050c9ca
PP
170#ifdef DEBUGGING
171 if ((long)size < 0 || (long)count < 0)
4f63d024 172 Perl_croak_nocontext("panic: calloc");
1050c9ca 173#endif
0b7c1c42 174 size *= count;
12ae5dfc 175 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 176 PERL_ALLOC_CHECK(ptr);
97835f67 177 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
178 if (ptr != Nullch) {
179 memset((void*)ptr, 0, size);
180 return ptr;
181 }
3280af22 182 else if (PL_nomemok)
1050c9ca
PP
183 return Nullch;
184 else {
bf49b057 185 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 186 my_exit(1);
4e35701f 187 return Nullch;
1050c9ca
PP
188 }
189 /*NOTREACHED*/
190}
191
a687059c
LW
192#ifdef LEAKTEST
193
8c52afec
IZ
194struct mem_test_strut {
195 union {
196 long type;
197 char c[2];
198 } u;
199 long size;
200};
201
202# define ALIGN sizeof(struct mem_test_strut)
203
204# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
205# define typeof_chunk(ch) \
206 (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
207# define set_typeof_chunk(ch,t) \
208 (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
209#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
210 ? MAXYCOUNT - 1 \
211 : ( (size) > 40 \
212 ? ((size) - 1)/8 + 5 \
213 : ((size) - 1)/4))
8d063cd8 214
bd4080b3 215Malloc_t
4f63d024 216Perl_safexmalloc(I32 x, MEM_SIZE size)
8d063cd8 217{
8c52afec 218 register char* where = (char*)safemalloc(size + ALIGN);
8d063cd8 219
8c52afec
IZ
220 xcount[x] += size;
221 xycount[x][SIZE_TO_Y(size)]++;
222 set_typeof_chunk(where, x);
223 sizeof_chunk(where) = size;
224 return (Malloc_t)(where + ALIGN);
8d063cd8 225}
8d063cd8 226
bd4080b3 227Malloc_t
4f63d024 228Perl_safexrealloc(Malloc_t wh, MEM_SIZE size)
a687059c 229{
8c52afec
IZ
230 char *where = (char*)wh;
231
232 if (!wh)
233 return safexmalloc(0,size);
a1d180c4 234
8c52afec
IZ
235 {
236 MEM_SIZE old = sizeof_chunk(where - ALIGN);
237 int t = typeof_chunk(where - ALIGN);
238 register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
a1d180c4 239
8c52afec
IZ
240 xycount[t][SIZE_TO_Y(old)]--;
241 xycount[t][SIZE_TO_Y(size)]++;
242 xcount[t] += size - old;
243 sizeof_chunk(new) = size;
244 return (Malloc_t)(new + ALIGN);
245 }
a687059c
LW
246}
247
248void
4f63d024 249Perl_safexfree(Malloc_t wh)
a687059c 250{
79072805 251 I32 x;
8c52afec
IZ
252 char *where = (char*)wh;
253 MEM_SIZE size;
a1d180c4 254
a687059c
LW
255 if (!where)
256 return;
257 where -= ALIGN;
8c52afec 258 size = sizeof_chunk(where);
a687059c 259 x = where[0] + 100 * where[1];
8c52afec
IZ
260 xcount[x] -= size;
261 xycount[x][SIZE_TO_Y(size)]--;
a687059c
LW
262 safefree(where);
263}
264
bd4080b3 265Malloc_t
4f63d024 266Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
1050c9ca 267{
8c52afec
IZ
268 register char * where = (char*)safexmalloc(x, size * count + ALIGN);
269 xcount[x] += size;
270 xycount[x][SIZE_TO_Y(size)]++;
271 memset((void*)(where + ALIGN), 0, size * count);
272 set_typeof_chunk(where, x);
273 sizeof_chunk(where) = size;
274 return (Malloc_t)(where + ALIGN);
1050c9ca
PP
275}
276
864dbfa3 277STATIC void
cea2e8a9 278S_xstat(pTHX_ int flag)
8d063cd8 279{
8c52afec
IZ
280 register I32 i, j, total = 0;
281 I32 subtot[MAXYCOUNT];
8d063cd8 282
8c52afec
IZ
283 for (j = 0; j < MAXYCOUNT; j++) {
284 subtot[j] = 0;
285 }
a1d180c4 286
bf49b057 287 PerlIO_printf(Perl_debug_log, " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total);
a687059c 288 for (i = 0; i < MAXXCOUNT; i++) {
8c52afec
IZ
289 total += xcount[i];
290 for (j = 0; j < MAXYCOUNT; j++) {
291 subtot[j] += xycount[i][j];
292 }
293 if (flag == 0
294 ? xcount[i] /* Have something */
a1d180c4 295 : (flag == 2
8c52afec
IZ
296 ? xcount[i] != lastxcount[i] /* Changed */
297 : xcount[i] > lastxcount[i])) { /* Growed */
a1d180c4 298 PerlIO_printf(Perl_debug_log,"%2d %02d %7ld ", i / 100, i % 100,
8c52afec 299 flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
a687059c 300 lastxcount[i] = xcount[i];
8c52afec 301 for (j = 0; j < MAXYCOUNT; j++) {
a1d180c4 302 if ( flag == 0
8c52afec 303 ? xycount[i][j] /* Have something */
a1d180c4 304 : (flag == 2
8c52afec
IZ
305 ? xycount[i][j] != lastxycount[i][j] /* Changed */
306 : xycount[i][j] > lastxycount[i][j])) { /* Growed */
a1d180c4
NIS
307 PerlIO_printf(Perl_debug_log,"%3ld ",
308 flag == 2
309 ? xycount[i][j] - lastxycount[i][j]
8c52afec
IZ
310 : xycount[i][j]);
311 lastxycount[i][j] = xycount[i][j];
312 } else {
bf49b057 313 PerlIO_printf(Perl_debug_log, " . ", xycount[i][j]);
8c52afec
IZ
314 }
315 }
bf49b057 316 PerlIO_printf(Perl_debug_log, "\n");
8c52afec
IZ
317 }
318 }
319 if (flag != 2) {
bf49b057 320 PerlIO_printf(Perl_debug_log, "Total %7ld ", total);
8c52afec
IZ
321 for (j = 0; j < MAXYCOUNT; j++) {
322 if (subtot[j]) {
bf49b057 323 PerlIO_printf(Perl_debug_log, "%3ld ", subtot[j]);
8c52afec 324 } else {
bf49b057 325 PerlIO_printf(Perl_debug_log, " . ");
8c52afec 326 }
8d063cd8 327 }
bf49b057 328 PerlIO_printf(Perl_debug_log, "\n");
8d063cd8 329 }
8d063cd8 330}
a687059c
LW
331
332#endif /* LEAKTEST */
8d063cd8 333
cae6d0e5
GS
334/* These must be defined when not using Perl's malloc for binary
335 * compatibility */
336
337#ifndef MYMALLOC
338
339Malloc_t Perl_malloc (MEM_SIZE nbytes)
340{
341 dTHXs;
342 return PerlMem_malloc(nbytes);
343}
344
345Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
346{
347 dTHXs;
348 return PerlMem_calloc(elements, size);
349}
350
351Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
352{
353 dTHXs;
354 return PerlMem_realloc(where, nbytes);
355}
356
357Free_t Perl_mfree (Malloc_t where)
358{
359 dTHXs;
360 PerlMem_free(where);
361}
362
363#endif
364
8d063cd8
LW
365/* copy a string up to some (non-backslashed) delimiter, if any */
366
367char *
864dbfa3 368Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
8d063cd8 369{
fc36a67e
PP
370 register I32 tolen;
371 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW
372 if (*from == '\\') {
373 if (from[1] == delim)
374 from++;
fc36a67e
PP
375 else {
376 if (to < toend)
377 *to++ = *from;
378 tolen++;
379 from++;
380 }
378cc40b 381 }
bedebaa5 382 else if (*from == delim)
8d063cd8 383 break;
fc36a67e
PP
384 if (to < toend)
385 *to++ = *from;
8d063cd8 386 }
bedebaa5
CS
387 if (to < toend)
388 *to = '\0';
fc36a67e 389 *retlen = tolen;
8d063cd8
LW
390 return from;
391}
392
393/* return ptr to little string in big string, NULL if not found */
378cc40b 394/* This routine was donated by Corey Satten. */
8d063cd8
LW
395
396char *
864dbfa3 397Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 398{
08105a92 399 register const char *s, *x;
79072805 400 register I32 first;
378cc40b 401
a687059c 402 if (!little)
08105a92 403 return (char*)big;
a687059c 404 first = *little++;
378cc40b 405 if (!first)
08105a92 406 return (char*)big;
378cc40b
LW
407 while (*big) {
408 if (*big++ != first)
409 continue;
410 for (x=big,s=little; *s; /**/ ) {
411 if (!*x)
412 return Nullch;
413 if (*s++ != *x++) {
414 s--;
415 break;
416 }
417 }
418 if (!*s)
08105a92 419 return (char*)(big-1);
378cc40b
LW
420 }
421 return Nullch;
422}
8d063cd8 423
a687059c
LW
424/* same as instr but allow embedded nulls */
425
426char *
864dbfa3 427Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 428{
08105a92 429 register const char *s, *x;
79072805 430 register I32 first = *little;
08105a92 431 register const char *littleend = lend;
378cc40b 432
a0d0e21e 433 if (!first && little >= littleend)
08105a92 434 return (char*)big;
de3bb511
LW
435 if (bigend - big < littleend - little)
436 return Nullch;
a687059c
LW
437 bigend -= littleend - little++;
438 while (big <= bigend) {
439 if (*big++ != first)
440 continue;
441 for (x=big,s=little; s < littleend; /**/ ) {
442 if (*s++ != *x++) {
443 s--;
444 break;
445 }
446 }
447 if (s >= littleend)
08105a92 448 return (char*)(big-1);
378cc40b 449 }
a687059c
LW
450 return Nullch;
451}
452
453/* reverse of the above--find last substring */
454
455char *
864dbfa3 456Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 457{
08105a92
GS
458 register const char *bigbeg;
459 register const char *s, *x;
79072805 460 register I32 first = *little;
08105a92 461 register const char *littleend = lend;
a687059c 462
a0d0e21e 463 if (!first && little >= littleend)
08105a92 464 return (char*)bigend;
a687059c
LW
465 bigbeg = big;
466 big = bigend - (littleend - little++);
467 while (big >= bigbeg) {
468 if (*big-- != first)
469 continue;
470 for (x=big+2,s=little; s < littleend; /**/ ) {
471 if (*s++ != *x++) {
472 s--;
473 break;
474 }
475 }
476 if (s >= littleend)
08105a92 477 return (char*)(big+1);
378cc40b 478 }
a687059c 479 return Nullch;
378cc40b 480}
a687059c 481
cf93c79d
IZ
482#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
483
484/* As a space optimization, we do not compile tables for strings of length
485 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
486 special-cased in fbm_instr().
487
488 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
489
954c1994 490/*
ccfc67b7
JH
491=head1 Miscellaneous Functions
492
954c1994
GS
493=for apidoc fbm_compile
494
495Analyses the string in order to make fast searches on it using fbm_instr()
496-- the Boyer-Moore algorithm.
497
498=cut
499*/
500
378cc40b 501void
7506f9c3 502Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 503{
942e002e
GS
504 register U8 *s;
505 register U8 *table;
79072805 506 register U32 i;
0b71040e 507 STRLEN len;
79072805
LW
508 I32 rarest = 0;
509 U32 frequency = 256;
510
cf93c79d
IZ
511 if (flags & FBMcf_TAIL)
512 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
942e002e 513 s = (U8*)SvPV_force(sv, len);
07f14f54 514 (void)SvUPGRADE(sv, SVt_PVBM);
d1be9408 515 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 516 return;
02128f11 517 if (len > 2) {
7506f9c3 518 U8 mlen;
cf93c79d
IZ
519 unsigned char *sb;
520
7506f9c3 521 if (len > 255)
cf93c79d 522 mlen = 255;
7506f9c3
GS
523 else
524 mlen = (U8)len;
525 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
cf93c79d 526 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS
527 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
528 memset((void*)table, mlen, 256);
529 table[-1] = (U8)flags;
02128f11 530 i = 0;
7506f9c3 531 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ
532 while (s >= sb) {
533 if (table[*s] == mlen)
7506f9c3 534 table[*s] = (U8)i;
cf93c79d
IZ
535 s--, i++;
536 }
378cc40b 537 }
14befaf4 538 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 539 SvVALID_on(sv);
378cc40b 540
463ee0b2 541 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
bbce6d69 542 for (i = 0; i < len; i++) {
22c35a8c 543 if (PL_freq[s[i]] < frequency) {
bbce6d69 544 rarest = i;
22c35a8c 545 frequency = PL_freq[s[i]];
378cc40b
LW
546 }
547 }
79072805
LW
548 BmRARE(sv) = s[rarest];
549 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ
550 BmUSEFUL(sv) = 100; /* Initial value */
551 if (flags & FBMcf_TAIL)
552 SvTAIL_on(sv);
7506f9c3
GS
553 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
554 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW
555}
556
cf93c79d
IZ
557/* If SvTAIL(littlestr), it has a fake '\n' at end. */
558/* If SvTAIL is actually due to \Z or \z, this gives false positives
559 if multiline */
560
954c1994
GS
561/*
562=for apidoc fbm_instr
563
564Returns the location of the SV in the string delimited by C<str> and
565C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
566does not have to be fbm_compiled, but the search will not be as fast
567then.
568
569=cut
570*/
571
378cc40b 572char *
864dbfa3 573Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 574{
a687059c 575 register unsigned char *s;
cf93c79d
IZ
576 STRLEN l;
577 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
578 register STRLEN littlelen = l;
579 register I32 multiline = flags & FBMrf_MULTILINE;
580
581 if (bigend - big < littlelen) {
a1d180c4 582 if ( SvTAIL(littlestr)
cf93c79d 583 && (bigend - big == littlelen - 1)
a1d180c4 584 && (littlelen == 1
12ae5dfc
JH
585 || (*big == *little &&
586 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ
587 return (char*)big;
588 return Nullch;
589 }
378cc40b 590
cf93c79d 591 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ
592
593 if (littlelen == 1) {
594 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
595 /* Know that bigend != big. */
596 if (bigend[-1] == '\n')
597 return (char *)(bigend - 1);
598 return (char *) bigend;
599 }
600 s = big;
601 while (s < bigend) {
602 if (*s == *little)
603 return (char *)s;
604 s++;
605 }
606 if (SvTAIL(littlestr))
607 return (char *) bigend;
608 return Nullch;
609 }
610 if (!littlelen)
611 return (char*)big; /* Cannot be SvTAIL! */
612
613 /* littlelen is 2 */
614 if (SvTAIL(littlestr) && !multiline) {
615 if (bigend[-1] == '\n' && bigend[-2] == *little)
616 return (char*)bigend - 2;
617 if (bigend[-1] == *little)
618 return (char*)bigend - 1;
619 return Nullch;
620 }
621 {
622 /* This should be better than FBM if c1 == c2, and almost
623 as good otherwise: maybe better since we do less indirection.
624 And we save a lot of memory by caching no table. */
625 register unsigned char c1 = little[0];
626 register unsigned char c2 = little[1];
627
628 s = big + 1;
629 bigend--;
630 if (c1 != c2) {
631 while (s <= bigend) {
632 if (s[0] == c2) {
633 if (s[-1] == c1)
634 return (char*)s - 1;
635 s += 2;
636 continue;
3fe6f2dc 637 }
cf93c79d
IZ
638 next_chars:
639 if (s[0] == c1) {
640 if (s == bigend)
641 goto check_1char_anchor;
642 if (s[1] == c2)
643 return (char*)s;
644 else {
645 s++;
646 goto next_chars;
647 }
648 }
649 else
650 s += 2;
651 }
652 goto check_1char_anchor;
653 }
654 /* Now c1 == c2 */
655 while (s <= bigend) {
656 if (s[0] == c1) {
657 if (s[-1] == c1)
658 return (char*)s - 1;
659 if (s == bigend)
660 goto check_1char_anchor;
661 if (s[1] == c1)
662 return (char*)s;
663 s += 3;
02128f11 664 }
c277df42 665 else
cf93c79d 666 s += 2;
c277df42 667 }
c277df42 668 }
cf93c79d
IZ
669 check_1char_anchor: /* One char and anchor! */
670 if (SvTAIL(littlestr) && (*bigend == *little))
671 return (char *)bigend; /* bigend is already decremented. */
672 return Nullch;
d48672a2 673 }
cf93c79d 674 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 675 s = bigend - littlelen;
a1d180c4 676 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
677 /* Automatically of length > 2 */
678 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 679 {
bbce6d69 680 return (char*)s; /* how sweet it is */
7506f9c3
GS
681 }
682 if (s[1] == *little
683 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
684 {
cf93c79d 685 return (char*)s + 1; /* how sweet it is */
7506f9c3 686 }
02128f11
IZ
687 return Nullch;
688 }
cf93c79d
IZ
689 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
690 char *b = ninstr((char*)big,(char*)bigend,
691 (char*)little, (char*)little + littlelen);
692
693 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
694 /* Chop \n from littlestr: */
695 s = bigend - littlelen + 1;
7506f9c3
GS
696 if (*s == *little
697 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
698 {
3fe6f2dc 699 return (char*)s;
7506f9c3 700 }
cf93c79d 701 return Nullch;
a687059c 702 }
cf93c79d 703 return b;
a687059c 704 }
a1d180c4 705
cf93c79d
IZ
706 { /* Do actual FBM. */
707 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
708 register unsigned char *oldlittle;
709
710 if (littlelen > bigend - big)
711 return Nullch;
712 --littlelen; /* Last char found by table lookup */
713
714 s = big + littlelen;
715 little += littlelen; /* last char */
716 oldlittle = little;
717 if (s < bigend) {
718 register I32 tmp;
719
720 top2:
721 /*SUPPRESS 560*/
7506f9c3 722 if ((tmp = table[*s])) {
cf93c79d 723 if ((s += tmp) < bigend)
62b28dd9 724 goto top2;
cf93c79d
IZ
725 goto check_end;
726 }
727 else { /* less expensive than calling strncmp() */
728 register unsigned char *olds = s;
729
730 tmp = littlelen;
731
732 while (tmp--) {
733 if (*--s == *--little)
734 continue;
cf93c79d
IZ
735 s = olds + 1; /* here we pay the price for failure */
736 little = oldlittle;
737 if (s < bigend) /* fake up continue to outer loop */
738 goto top2;
739 goto check_end;
740 }
741 return (char *)s;
a687059c 742 }
378cc40b 743 }
cf93c79d
IZ
744 check_end:
745 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH
746 && memEQ((char *)(bigend - littlelen),
747 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ
748 return (char*)bigend - littlelen;
749 return Nullch;
378cc40b 750 }
378cc40b
LW
751}
752
c277df42
IZ
753/* start_shift, end_shift are positive quantities which give offsets
754 of ends of some substring of bigstr.
755 If `last' we want the last occurence.
756 old_posp is the way of communication between consequent calls if
a1d180c4 757 the next call needs to find the .
c277df42 758 The initial *old_posp should be -1.
cf93c79d
IZ
759
760 Note that we take into account SvTAIL, so one can get extra
761 optimizations if _ALL flag is set.
c277df42
IZ
762 */
763
cf93c79d 764/* If SvTAIL is actually due to \Z or \z, this gives false positives
26fa51c3 765 if PL_multiline. In fact if !PL_multiline the authoritative answer
cf93c79d
IZ
766 is not supported yet. */
767
378cc40b 768char *
864dbfa3 769Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 770{
a687059c
LW
771 register unsigned char *s, *x;
772 register unsigned char *big;
79072805
LW
773 register I32 pos;
774 register I32 previous;
775 register I32 first;
a687059c 776 register unsigned char *little;
c277df42 777 register I32 stop_pos;
a687059c 778 register unsigned char *littleend;
c277df42 779 I32 found = 0;
378cc40b 780
c277df42 781 if (*old_posp == -1
3280af22 782 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ
783 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
784 cant_find:
a1d180c4 785 if ( BmRARE(littlestr) == '\n'
cf93c79d
IZ
786 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
787 little = (unsigned char *)(SvPVX(littlestr));
788 littleend = little + SvCUR(littlestr);
789 first = *little++;
790 goto check_tail;
791 }
378cc40b 792 return Nullch;
cf93c79d
IZ
793 }
794
463ee0b2 795 little = (unsigned char *)(SvPVX(littlestr));
79072805 796 littleend = little + SvCUR(littlestr);
378cc40b 797 first = *little++;
c277df42 798 /* The value of pos we can start at: */
79072805 799 previous = BmPREVIOUS(littlestr);
463ee0b2 800 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ
801 /* The value of pos we can stop at: */
802 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d 803 if (previous + start_shift > stop_pos) {
0fe87f7c
HS
804/*
805 stop_pos does not include SvTAIL in the count, so this check is incorrect
806 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
807*/
808#if 0
cf93c79d
IZ
809 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
810 goto check_tail;
0fe87f7c 811#endif
cf93c79d
IZ
812 return Nullch;
813 }
c277df42 814 while (pos < previous + start_shift) {
3280af22 815 if (!(pos += PL_screamnext[pos]))
cf93c79d 816 goto cant_find;
378cc40b 817 }
de3bb511 818 big -= previous;
bbce6d69 819 do {
ef64f398 820 if (pos >= stop_pos) break;
bbce6d69
PP
821 if (big[pos] != first)
822 continue;
823 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69
PP
824 if (*s++ != *x++) {
825 s--;
826 break;
378cc40b 827 }
bbce6d69 828 }
c277df42
IZ
829 if (s == littleend) {
830 *old_posp = pos;
831 if (!last) return (char *)(big+pos);
832 found = 1;
833 }
3280af22 834 } while ( pos += PL_screamnext[pos] );
a1d180c4 835 if (last && found)
cf93c79d 836 return (char *)(big+(*old_posp));
cf93c79d
IZ
837 check_tail:
838 if (!SvTAIL(littlestr) || (end_shift > 0))
839 return Nullch;
840 /* Ignore the trailing "\n". This code is not microoptimized */
841 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
842 stop_pos = littleend - little; /* Actual littlestr len */
843 if (stop_pos == 0)
844 return (char*)big;
845 big -= stop_pos;
846 if (*big == first
12ae5dfc
JH
847 && ((stop_pos == 1) ||
848 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ
849 return (char*)big;
850 return Nullch;
8d063cd8
LW
851}
852
79072805 853I32
864dbfa3 854Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 855{
bbce6d69
PP
856 register U8 *a = (U8 *)s1;
857 register U8 *b = (U8 *)s2;
79072805 858 while (len--) {
22c35a8c 859 if (*a != *b && *a != PL_fold[*b])
bbce6d69
PP
860 return 1;
861 a++,b++;
862 }
863 return 0;
864}
865
866I32
864dbfa3 867Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69
PP
868{
869 register U8 *a = (U8 *)s1;
870 register U8 *b = (U8 *)s2;
871 while (len--) {
22c35a8c 872 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69
PP
873 return 1;
874 a++,b++;
79072805
LW
875 }
876 return 0;
877}
878
8d063cd8
LW
879/* copy a string to a safe spot */
880
954c1994 881/*
ccfc67b7
JH
882=head1 Memory Management
883
954c1994
GS
884=for apidoc savepv
885
886Copy a string to a safe spot. This does not use an SV.
887
888=cut
889*/
890
8d063cd8 891char *
864dbfa3 892Perl_savepv(pTHX_ const char *sv)
8d063cd8 893{
a687059c 894 register char *newaddr;
8d063cd8 895
79072805
LW
896 New(902,newaddr,strlen(sv)+1,char);
897 (void)strcpy(newaddr,sv);
8d063cd8
LW
898 return newaddr;
899}
900
a687059c
LW
901/* same thing but with a known length */
902
954c1994
GS
903/*
904=for apidoc savepvn
905
906Copy a string to a safe spot. The C<len> indicates number of bytes to
907copy. This does not use an SV.
908
909=cut
910*/
911
a687059c 912char *
864dbfa3 913Perl_savepvn(pTHX_ const char *sv, register I32 len)
a687059c
LW
914{
915 register char *newaddr;
916
917 New(903,newaddr,len+1,char);
79072805 918 Copy(sv,newaddr,len,char); /* might not be null terminated */
a687059c
LW
919 newaddr[len] = '\0'; /* is now */
920 return newaddr;
921}
922
cea2e8a9 923/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 924
76e3520e 925STATIC SV *
cea2e8a9 926S_mess_alloc(pTHX)
fc36a67e
PP
927{
928 SV *sv;
929 XPVMG *any;
930
e72dc28c
GS
931 if (!PL_dirty)
932 return sv_2mortal(newSVpvn("",0));
933
0372dbb6
GS
934 if (PL_mess_sv)
935 return PL_mess_sv;
936
fc36a67e
PP
937 /* Create as PVMG now, to avoid any upgrading later */
938 New(905, sv, 1, SV);
939 Newz(905, any, 1, XPVMG);
940 SvFLAGS(sv) = SVt_PVMG;
941 SvANY(sv) = (void*)any;
942 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 943 PL_mess_sv = sv;
fc36a67e
PP
944 return sv;
945}
946
c5be433b 947#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
948char *
949Perl_form_nocontext(const char* pat, ...)
950{
951 dTHX;
c5be433b 952 char *retval;
cea2e8a9
GS
953 va_list args;
954 va_start(args, pat);
c5be433b 955 retval = vform(pat, &args);
cea2e8a9 956 va_end(args);
c5be433b 957 return retval;
cea2e8a9 958}
c5be433b 959#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 960
7c9e965c 961/*
ccfc67b7 962=head1 Miscellaneous Functions
7c9e965c
JP
963=for apidoc form
964
965Takes a sprintf-style format pattern and conventional
966(non-SV) arguments and returns the formatted string.
967
968 (char *) Perl_form(pTHX_ const char* pat, ...)
969
970can be used any place a string (char *) is required:
971
972 char * s = Perl_form("%d.%d",major,minor);
973
974Uses a single private buffer so if you want to format several strings you
975must explicitly copy the earlier strings away (and free the copies when you
976are done).
977
978=cut
979*/
980
8990e307 981char *
864dbfa3 982Perl_form(pTHX_ const char* pat, ...)
8990e307 983{
c5be433b 984 char *retval;
46fc3d4c 985 va_list args;
46fc3d4c 986 va_start(args, pat);
c5be433b 987 retval = vform(pat, &args);
46fc3d4c 988 va_end(args);
c5be433b
GS
989 return retval;
990}
991
992char *
993Perl_vform(pTHX_ const char *pat, va_list *args)
994{
995 SV *sv = mess_alloc();
996 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
e72dc28c 997 return SvPVX(sv);
46fc3d4c 998}
a687059c 999
5a844595
GS
1000#if defined(PERL_IMPLICIT_CONTEXT)
1001SV *
1002Perl_mess_nocontext(const char *pat, ...)
1003{
1004 dTHX;
1005 SV *retval;
1006 va_list args;
1007 va_start(args, pat);
1008 retval = vmess(pat, &args);
1009 va_end(args);
1010 return retval;
1011}
1012#endif /* PERL_IMPLICIT_CONTEXT */
1013
06bf62c7 1014SV *
5a844595
GS
1015Perl_mess(pTHX_ const char *pat, ...)
1016{
1017 SV *retval;
1018 va_list args;
1019 va_start(args, pat);
1020 retval = vmess(pat, &args);
1021 va_end(args);
1022 return retval;
1023}
1024
ae7d165c
PJ
1025STATIC COP*
1026S_closest_cop(pTHX_ COP *cop, OP *o)
1027{
1028 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1029
1030 if (!o || o == PL_op) return cop;
1031
1032 if (o->op_flags & OPf_KIDS) {
1033 OP *kid;
1034 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
1035 {
1036 COP *new_cop;
1037
1038 /* If the OP_NEXTSTATE has been optimised away we can still use it
1039 * the get the file and line number. */
1040
1041 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
1042 cop = (COP *)kid;
1043
1044 /* Keep searching, and return when we've found something. */
1045
1046 new_cop = closest_cop(cop, kid);
1047 if (new_cop) return new_cop;
1048 }
1049 }
1050
1051 /* Nothing found. */
1052
1053 return 0;
1054}
1055
5a844595
GS
1056SV *
1057Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1058{
e72dc28c 1059 SV *sv = mess_alloc();
46fc3d4c 1060 static char dgd[] = " during global destruction.\n";
ae7d165c 1061 COP *cop;
46fc3d4c 1062
fc36a67e 1063 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1064 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
1065
1066 /*
1067 * Try and find the file and line for PL_op. This will usually be
1068 * PL_curcop, but it might be a cop that has been optimised away. We
1069 * can try to find such a cop by searching through the optree starting
1070 * from the sibling of PL_curcop.
1071 */
1072
1073 cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
1074 if (!cop) cop = PL_curcop;
1075
1076 if (CopLINE(cop))
ed094faf 1077 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
ae7d165c 1078 CopFILE(cop), (IV)CopLINE(cop));
515f54a1
GS
1079 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1080 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1081 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
57def98f 1082 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
cf2093f6 1083 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
a1d180c4 1084 line_mode ? "line" : "chunk",
cf2093f6 1085 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1086 }
4d1ff10f 1087#ifdef USE_5005THREADS
e8e6f333
GS
1088 if (thr->tid)
1089 Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid);
9efbc0eb 1090#endif
515f54a1 1091 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1092 }
06bf62c7 1093 return sv;
a687059c
LW
1094}
1095
c5be433b
GS
1096OP *
1097Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1098{
36477c24 1099 char *message;
3280af22 1100 int was_in_eval = PL_in_eval;
36477c24
PP
1101 HV *stash;
1102 GV *gv;
1103 CV *cv;
06bf62c7
GS
1104 SV *msv;
1105 STRLEN msglen;
36477c24 1106
bf49b057 1107 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1108 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1109 thr, PL_curstack, PL_mainstack));
36477c24 1110
06bf62c7 1111 if (pat) {
5a844595
GS
1112 msv = vmess(pat, args);
1113 if (PL_errors && SvCUR(PL_errors)) {
1114 sv_catsv(PL_errors, msv);
1115 message = SvPV(PL_errors, msglen);
1116 SvCUR_set(PL_errors, 0);
1117 }
1118 else
1119 message = SvPV(msv,msglen);
06bf62c7
GS
1120 }
1121 else {
1122 message = Nullch;
0f79a09d 1123 msglen = 0;
06bf62c7 1124 }
36477c24 1125
bf49b057 1126 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1127 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1128 thr, message, PL_diehook));
3280af22 1129 if (PL_diehook) {
cea2e8a9 1130 /* sv_2cv might call Perl_croak() */
3280af22 1131 SV *olddiehook = PL_diehook;
1738f5c4 1132 ENTER;
3280af22
NIS
1133 SAVESPTR(PL_diehook);
1134 PL_diehook = Nullsv;
1738f5c4
CS
1135 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1136 LEAVE;
1137 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1138 dSP;
774d564b
PP
1139 SV *msg;
1140
1141 ENTER;
3a1f2dc9 1142 save_re_context();
79cb57f6 1143 if (message) {
06bf62c7 1144 msg = newSVpvn(message, msglen);
4e6ea2c3
GS
1145 SvREADONLY_on(msg);
1146 SAVEFREESV(msg);
1147 }
1148 else {
1149 msg = ERRSV;
1150 }
1738f5c4 1151
e788e7d3 1152 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1153 PUSHMARK(SP);
1738f5c4
CS
1154 XPUSHs(msg);
1155 PUTBACK;
0cdb2077 1156 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1157 POPSTACK;
774d564b 1158 LEAVE;
1738f5c4 1159 }
36477c24
PP
1160 }
1161
06bf62c7 1162 PL_restartop = die_where(message, msglen);
bf49b057 1163 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1164 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1165 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1166 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1167 JMPENV_JUMP(3);
3280af22 1168 return PL_restartop;
36477c24
PP
1169}
1170
c5be433b 1171#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1172OP *
1173Perl_die_nocontext(const char* pat, ...)
a687059c 1174{
cea2e8a9
GS
1175 dTHX;
1176 OP *o;
a687059c 1177 va_list args;
cea2e8a9 1178 va_start(args, pat);
c5be433b 1179 o = vdie(pat, &args);
cea2e8a9
GS
1180 va_end(args);
1181 return o;
1182}
c5be433b 1183#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS
1184
1185OP *
1186Perl_die(pTHX_ const char* pat, ...)
1187{
1188 OP *o;
1189 va_list args;
1190 va_start(args, pat);
c5be433b 1191 o = vdie(pat, &args);
cea2e8a9
GS
1192 va_end(args);
1193 return o;
1194}
1195
c5be433b
GS
1196void
1197Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1198{
de3bb511 1199 char *message;
748a9306
LW
1200 HV *stash;
1201 GV *gv;
1202 CV *cv;
06bf62c7
GS
1203 SV *msv;
1204 STRLEN msglen;
a687059c 1205
9983fa3c
GS
1206 if (pat) {
1207 msv = vmess(pat, args);
1208 if (PL_errors && SvCUR(PL_errors)) {
1209 sv_catsv(PL_errors, msv);
1210 message = SvPV(PL_errors, msglen);
1211 SvCUR_set(PL_errors, 0);
1212 }
1213 else
1214 message = SvPV(msv,msglen);
1215 }
1216 else {
1217 message = Nullch;
1218 msglen = 0;
5a844595 1219 }
5a844595 1220
b900a521
JH
1221 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
1222 PTR2UV(thr), message));
5a844595 1223
3280af22 1224 if (PL_diehook) {
cea2e8a9 1225 /* sv_2cv might call Perl_croak() */
3280af22 1226 SV *olddiehook = PL_diehook;
1738f5c4 1227 ENTER;
3280af22
NIS
1228 SAVESPTR(PL_diehook);
1229 PL_diehook = Nullsv;
20cec16a 1230 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS
1231 LEAVE;
1232 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1233 dSP;
774d564b
PP
1234 SV *msg;
1235
1236 ENTER;
3a1f2dc9 1237 save_re_context();
9983fa3c
GS
1238 if (message) {
1239 msg = newSVpvn(message, msglen);
1240 SvREADONLY_on(msg);
1241 SAVEFREESV(msg);
1242 }
1243 else {
1244 msg = ERRSV;
1245 }
20cec16a 1246
e788e7d3 1247 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1248 PUSHMARK(SP);
1738f5c4 1249 XPUSHs(msg);
20cec16a 1250 PUTBACK;
864dbfa3 1251 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1252 POPSTACK;
774d564b 1253 LEAVE;
20cec16a 1254 }
748a9306 1255 }
3280af22 1256 if (PL_in_eval) {
06bf62c7 1257 PL_restartop = die_where(message, msglen);
6224f72b 1258 JMPENV_JUMP(3);
a0d0e21e 1259 }
84414e3e
JH
1260 else if (!message)
1261 message = SvPVx(ERRSV, msglen);
1262
d175a3f0
GS
1263 {
1264#ifdef USE_SFIO
1265 /* SFIO can really mess with your errno */
1266 int e = errno;
1267#endif
bf49b057
GS
1268 PerlIO *serr = Perl_error_log;
1269
be708cc0 1270 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
bf49b057 1271 (void)PerlIO_flush(serr);
d175a3f0
GS
1272#ifdef USE_SFIO
1273 errno = e;
1274#endif
1275 }
f86702cc 1276 my_failure_exit();
a687059c
LW
1277}
1278
c5be433b 1279#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1280void
cea2e8a9 1281Perl_croak_nocontext(const char *pat, ...)
a687059c 1282{
cea2e8a9 1283 dTHX;
a687059c 1284 va_list args;
cea2e8a9 1285 va_start(args, pat);
c5be433b 1286 vcroak(pat, &args);
cea2e8a9
GS
1287 /* NOTREACHED */
1288 va_end(args);
1289}
1290#endif /* PERL_IMPLICIT_CONTEXT */
1291
954c1994 1292/*
ccfc67b7
JH
1293=head1 Warning and Dieing
1294
954c1994
GS
1295=for apidoc croak
1296
9983fa3c
GS
1297This is the XSUB-writer's interface to Perl's C<die> function.
1298Normally use this function the same way you use the C C<printf>
1299function. See C<warn>.
1300
1301If you want to throw an exception object, assign the object to
1302C<$@> and then pass C<Nullch> to croak():
1303
1304 errsv = get_sv("@", TRUE);
1305 sv_setsv(errsv, exception_object);
1306 croak(Nullch);
954c1994
GS
1307
1308=cut
1309*/
1310
cea2e8a9
GS
1311void
1312Perl_croak(pTHX_ const char *pat, ...)
1313{
1314 va_list args;
1315 va_start(args, pat);
c5be433b 1316 vcroak(pat, &args);
cea2e8a9
GS
1317 /* NOTREACHED */
1318 va_end(args);
1319}
1320
c5be433b
GS
1321void
1322Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1323{
de3bb511 1324 char *message;
748a9306
LW
1325 HV *stash;
1326 GV *gv;
1327 CV *cv;
06bf62c7
GS
1328 SV *msv;
1329 STRLEN msglen;
a687059c 1330
5a844595 1331 msv = vmess(pat, args);
06bf62c7 1332 message = SvPV(msv, msglen);
a687059c 1333
3280af22 1334 if (PL_warnhook) {
cea2e8a9 1335 /* sv_2cv might call Perl_warn() */
3280af22 1336 SV *oldwarnhook = PL_warnhook;
1738f5c4 1337 ENTER;
3280af22
NIS
1338 SAVESPTR(PL_warnhook);
1339 PL_warnhook = Nullsv;
20cec16a 1340 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS
1341 LEAVE;
1342 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1343 dSP;
774d564b
PP
1344 SV *msg;
1345
1346 ENTER;
3a1f2dc9 1347 save_re_context();
06bf62c7 1348 msg = newSVpvn(message, msglen);
774d564b
PP
1349 SvREADONLY_on(msg);
1350 SAVEFREESV(msg);
1351
e788e7d3 1352 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1353 PUSHMARK(SP);
774d564b 1354 XPUSHs(msg);
20cec16a 1355 PUTBACK;
864dbfa3 1356 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1357 POPSTACK;
774d564b 1358 LEAVE;
20cec16a
PP
1359 return;
1360 }
748a9306 1361 }
bf49b057
GS
1362 {
1363 PerlIO *serr = Perl_error_log;
1364
be708cc0 1365 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
a687059c 1366#ifdef LEAKTEST
a1d180c4 1367 DEBUG_L(*message == '!'
bf49b057
GS
1368 ? (xstat(message[1]=='!'
1369 ? (message[2]=='!' ? 2 : 1)
1370 : 0)
1371 , 0)
1372 : 0);
a687059c 1373#endif
bf49b057
GS
1374 (void)PerlIO_flush(serr);
1375 }
a687059c 1376}
8d063cd8 1377
c5be433b 1378#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1379void
1380Perl_warn_nocontext(const char *pat, ...)
1381{
1382 dTHX;
1383 va_list args;
1384 va_start(args, pat);
c5be433b 1385 vwarn(pat, &args);
cea2e8a9
GS
1386 va_end(args);
1387}
1388#endif /* PERL_IMPLICIT_CONTEXT */
1389
954c1994
GS
1390/*
1391=for apidoc warn
1392
1393This is the XSUB-writer's interface to Perl's C<warn> function. Use this
1394function the same way you use the C C<printf> function. See
1395C<croak>.
1396
1397=cut
1398*/
1399
cea2e8a9
GS
1400void
1401Perl_warn(pTHX_ const char *pat, ...)
1402{
1403 va_list args;
1404 va_start(args, pat);
c5be433b 1405 vwarn(pat, &args);
cea2e8a9
GS
1406 va_end(args);
1407}
1408
c5be433b
GS
1409#if defined(PERL_IMPLICIT_CONTEXT)
1410void
1411Perl_warner_nocontext(U32 err, const char *pat, ...)
1412{
1413 dTHX;
1414 va_list args;
1415 va_start(args, pat);
1416 vwarner(err, pat, &args);
1417 va_end(args);
1418}
1419#endif /* PERL_IMPLICIT_CONTEXT */
1420
599cee73 1421void
864dbfa3 1422Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1423{
1424 va_list args;
c5be433b
GS
1425 va_start(args, pat);
1426 vwarner(err, pat, &args);
1427 va_end(args);
1428}
1429
1430void
1431Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1432{
599cee73
PM
1433 char *message;
1434 HV *stash;
1435 GV *gv;
1436 CV *cv;
06bf62c7
GS
1437 SV *msv;
1438 STRLEN msglen;
599cee73 1439
5a844595 1440 msv = vmess(pat, args);
06bf62c7 1441 message = SvPV(msv, msglen);
599cee73
PM
1442
1443 if (ckDEAD(err)) {
4d1ff10f 1444#ifdef USE_5005THREADS
b900a521 1445 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message));
4d1ff10f 1446#endif /* USE_5005THREADS */
599cee73 1447 if (PL_diehook) {
cea2e8a9 1448 /* sv_2cv might call Perl_croak() */
599cee73
PM
1449 SV *olddiehook = PL_diehook;
1450 ENTER;
1451 SAVESPTR(PL_diehook);
1452 PL_diehook = Nullsv;
1453 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1454 LEAVE;
1455 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1456 dSP;
1457 SV *msg;
a1d180c4 1458
599cee73 1459 ENTER;
3a1f2dc9 1460 save_re_context();
06bf62c7 1461 msg = newSVpvn(message, msglen);
599cee73
PM
1462 SvREADONLY_on(msg);
1463 SAVEFREESV(msg);
a1d180c4 1464
3a1f2dc9 1465 PUSHSTACKi(PERLSI_DIEHOOK);
599cee73
PM
1466 PUSHMARK(sp);
1467 XPUSHs(msg);
1468 PUTBACK;
864dbfa3 1469 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1470 POPSTACK;
599cee73
PM
1471 LEAVE;
1472 }
1473 }
1474 if (PL_in_eval) {
06bf62c7 1475 PL_restartop = die_where(message, msglen);
599cee73
PM
1476 JMPENV_JUMP(3);
1477 }
bf49b057
GS
1478 {
1479 PerlIO *serr = Perl_error_log;
be708cc0 1480 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
bf49b057
GS
1481 (void)PerlIO_flush(serr);
1482 }
599cee73
PM
1483 my_failure_exit();
1484
1485 }
1486 else {
1487 if (PL_warnhook) {
cea2e8a9 1488 /* sv_2cv might call Perl_warn() */
599cee73
PM
1489 SV *oldwarnhook = PL_warnhook;
1490 ENTER;
1491 SAVESPTR(PL_warnhook);
1492 PL_warnhook = Nullsv;
1493 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
3a1f2dc9 1494 LEAVE;
599cee73
PM
1495 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1496 dSP;
1497 SV *msg;
a1d180c4 1498
599cee73 1499 ENTER;
3a1f2dc9 1500 save_re_context();
06bf62c7 1501 msg = newSVpvn(message, msglen);
599cee73
PM
1502 SvREADONLY_on(msg);
1503 SAVEFREESV(msg);
a1d180c4 1504
3a1f2dc9 1505 PUSHSTACKi(PERLSI_WARNHOOK);
599cee73
PM
1506 PUSHMARK(sp);
1507 XPUSHs(msg);
1508 PUTBACK;
864dbfa3 1509 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1510 POPSTACK;
599cee73
PM
1511 LEAVE;
1512 return;
1513 }
1514 }
bf49b057
GS
1515 {
1516 PerlIO *serr = Perl_error_log;
be708cc0 1517 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
599cee73 1518#ifdef LEAKTEST
a1d180c4 1519 DEBUG_L(*message == '!'
06247ec9
JH
1520 ? (xstat(message[1]=='!'
1521 ? (message[2]=='!' ? 2 : 1)
1522 : 0)
1523 , 0)
1524 : 0);
599cee73 1525#endif
bf49b057
GS
1526 (void)PerlIO_flush(serr);
1527 }
599cee73
PM
1528 }
1529}
1530
e6587932
DM
1531/* since we've already done strlen() for both nam and val
1532 * we can use that info to make things faster than
1533 * sprintf(s, "%s=%s", nam, val)
1534 */
1535#define my_setenv_format(s, nam, nlen, val, vlen) \
1536 Copy(nam, s, nlen, char); \
1537 *(s+nlen) = '='; \
1538 Copy(val, s+(nlen+1), vlen, char); \
1539 *(s+(nlen+1+vlen)) = '\0'
1540
13b6e58c
JH
1541#ifdef USE_ENVIRON_ARRAY
1542 /* VMS' and EPOC's my_setenv() is in vms.c and epoc.c */
2986a63f 1543#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1544void
864dbfa3 1545Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1546{
f2517201
GS
1547#ifndef PERL_USE_SAFE_PUTENV
1548 /* most putenv()s leak, so we manipulate environ directly */
79072805 1549 register I32 i=setenv_getix(nam); /* where does it go? */
e6587932 1550 int nlen, vlen;
8d063cd8 1551
3280af22 1552 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW
1553 I32 j;
1554 I32 max;
fe14fcc3
LW
1555 char **tmpenv;
1556
de3bb511 1557 /*SUPPRESS 530*/
fe14fcc3 1558 for (max = i; environ[max]; max++) ;
f2517201
GS
1559 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1560 for (j=0; j<max; j++) { /* copy environment */
e6587932
DM
1561 int len = strlen(environ[j]);
1562 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1563 Copy(environ[j], tmpenv[j], len+1, char);
f2517201 1564 }
fe14fcc3
LW
1565 tmpenv[max] = Nullch;
1566 environ = tmpenv; /* tell exec where it is now */
1567 }
a687059c 1568 if (!val) {
f2517201 1569 safesysfree(environ[i]);
a687059c
LW
1570 while (environ[i]) {
1571 environ[i] = environ[i+1];
1572 i++;
1573 }
1574 return;
1575 }
8d063cd8 1576 if (!environ[i]) { /* does not exist yet */
f2517201 1577 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW
1578 environ[i+1] = Nullch; /* make sure it's null terminated */
1579 }
fe14fcc3 1580 else
f2517201 1581 safesysfree(environ[i]);
e6587932
DM
1582 nlen = strlen(nam);
1583 vlen = strlen(val);
f2517201 1584
e6587932
DM
1585 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1586 /* all that work just for this */
1587 my_setenv_format(environ[i], nam, nlen, val, vlen);
f2517201
GS
1588
1589#else /* PERL_USE_SAFE_PUTENV */
47dafe4d
FE
1590# if defined(__CYGWIN__)
1591 setenv(nam, val, 1);
1592# else
f2517201 1593 char *new_env;
e6587932
DM
1594 int nlen = strlen(nam), vlen;
1595 if (!val) {
1596 val = "";
1597 }
1598 vlen = strlen(val);
1599 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1600 /* all that work just for this */
1601 my_setenv_format(new_env, nam, nlen, val, vlen);
f2517201 1602 (void)putenv(new_env);
47dafe4d 1603# endif /* __CYGWIN__ */
f2517201 1604#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW
1605}
1606
2986a63f 1607#else /* WIN32 || NETWARE */
68dc0745
PP
1608
1609void
864dbfa3 1610Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 1611{
ac5c734f 1612 register char *envstr;
e6587932
DM
1613 int nlen = strlen(nam), vlen;
1614
ac5c734f
GS
1615 if (!val) {
1616 val = "";
1617 }
e6587932
DM
1618 vlen = strlen(val);
1619 New(904, envstr, nlen+vlen+2, char);
1620 my_setenv_format(envstr, nam, nlen, val, vlen);
ac5c734f
GS
1621 (void)PerlEnv_putenv(envstr);
1622 Safefree(envstr);
3e3baf6d
TB
1623}
1624
2986a63f 1625#endif /* WIN32 || NETWARE */
3e3baf6d
TB
1626
1627I32
864dbfa3 1628Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB
1629{
1630 register I32 i, len = strlen(nam);
1631
1632 for (i = 0; environ[i]; i++) {
1633 if (
1634#ifdef WIN32
1635 strnicmp(environ[i],nam,len) == 0
1636#else
1637 strnEQ(environ[i],nam,len)
1638#endif
1639 && environ[i][len] == '=')
1640 break; /* strnEQ must come first to avoid */
1641 } /* potential SEGV's */
1642 return i;
68dc0745
PP
1643}
1644
ed79a026 1645#endif /* !VMS && !EPOC*/
378cc40b 1646
16d20bd9 1647#ifdef UNLINK_ALL_VERSIONS
79072805 1648I32
864dbfa3 1649Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 1650{
79072805 1651 I32 i;
378cc40b 1652
6ad3d225 1653 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW
1654 return i ? 0 : -1;
1655}
1656#endif
1657
7a3f2258 1658/* this is a drop-in replacement for bcopy() */
2253333f 1659#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 1660char *
7a3f2258 1661Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b
LW
1662{
1663 char *retval = to;
1664
7c0587c8
LW
1665 if (from - to >= 0) {
1666 while (len--)
1667 *to++ = *from++;
1668 }
1669 else {
1670 to += len;
1671 from += len;
1672 while (len--)
faf8582f 1673 *(--to) = *(--from);
7c0587c8 1674 }
378cc40b
LW
1675 return retval;
1676}
ffed7fef 1677#endif
378cc40b 1678
7a3f2258 1679/* this is a drop-in replacement for memset() */
fc36a67e
PP
1680#ifndef HAS_MEMSET
1681void *
7a3f2258 1682Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e
PP
1683{
1684 char *retval = loc;
1685
1686 while (len--)
1687 *loc++ = ch;
1688 return retval;
1689}
1690#endif
1691
7a3f2258 1692/* this is a drop-in replacement for bzero() */
7c0587c8 1693#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 1694char *
7a3f2258 1695Perl_my_bzero(register char *loc, register I32 len)
378cc40b
LW
1696{
1697 char *retval = loc;
1698
1699 while (len--)
1700 *loc++ = 0;
1701 return retval;
1702}
1703#endif
7c0587c8 1704
7a3f2258 1705/* this is a drop-in replacement for memcmp() */
36477c24 1706#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 1707I32
7a3f2258 1708Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 1709{
36477c24
PP
1710 register U8 *a = (U8 *)s1;
1711 register U8 *b = (U8 *)s2;
79072805 1712 register I32 tmp;
7c0587c8
LW
1713
1714 while (len--) {
36477c24 1715 if (tmp = *a++ - *b++)
7c0587c8
LW
1716 return tmp;
1717 }
1718 return 0;
1719}
36477c24 1720#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 1721
fe14fcc3 1722#ifndef HAS_VPRINTF
a687059c 1723
85e6fe83 1724#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1725char *
1726#else
1727int
1728#endif
08105a92 1729vsprintf(char *dest, const char *pat, char *args)
a687059c
LW
1730{
1731 FILE fakebuf;
1732
1733 fakebuf._ptr = dest;
1734 fakebuf._cnt = 32767;
35c8bce7
LW
1735#ifndef _IOSTRG
1736#define _IOSTRG 0
1737#endif
a687059c
LW
1738 fakebuf._flag = _IOWRT|_IOSTRG;
1739 _doprnt(pat, args, &fakebuf); /* what a kludge */
1740 (void)putc('\0', &fakebuf);
85e6fe83 1741#ifdef USE_CHAR_VSPRINTF
a687059c
LW
1742 return(dest);
1743#else
1744 return 0; /* perl doesn't use return value */
1745#endif
1746}
1747
fe14fcc3 1748#endif /* HAS_VPRINTF */
a687059c
LW
1749
1750#ifdef MYSWAP
ffed7fef 1751#if BYTEORDER != 0x4321
a687059c 1752short
864dbfa3 1753Perl_my_swap(pTHX_ short s)
a687059c
LW
1754{
1755#if (BYTEORDER & 1) == 0
1756 short result;
1757
1758 result = ((s & 255) << 8) + ((s >> 8) & 255);
1759 return result;
1760#else
1761 return s;
1762#endif
1763}
1764
1765long
864dbfa3 1766Perl_my_htonl(pTHX_ long l)
a687059c
LW
1767{
1768 union {
1769 long result;
ffed7fef 1770 char c[sizeof(long)];
a687059c
LW
1771 } u;
1772
ffed7fef 1773#if BYTEORDER == 0x1234
a687059c
LW
1774 u.c[0] = (l >> 24) & 255;
1775 u.c[1] = (l >> 16) & 255;
1776 u.c[2] = (l >> 8) & 255;
1777 u.c[3] = l & 255;
1778 return u.result;
1779#else
ffed7fef 1780#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1781 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1782#else
79072805
LW
1783 register I32 o;
1784 register I32 s;
a687059c 1785
ffed7fef
LW
1786 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1787 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW
1788 }
1789 return u.result;
1790#endif
1791#endif
1792}
1793
1794long
864dbfa3 1795Perl_my_ntohl(pTHX_ long l)
a687059c
LW
1796{
1797 union {
1798 long l;
ffed7fef 1799 char c[sizeof(long)];
a687059c
LW
1800 } u;
1801
ffed7fef 1802#if BYTEORDER == 0x1234
a687059c
LW
1803 u.c[0] = (l >> 24) & 255;
1804 u.c[1] = (l >> 16) & 255;
1805 u.c[2] = (l >> 8) & 255;
1806 u.c[3] = l & 255;
1807 return u.l;
1808#else
ffed7fef 1809#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 1810 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 1811#else
79072805
LW
1812 register I32 o;
1813 register I32 s;
a687059c
LW
1814
1815 u.l = l;
1816 l = 0;
ffed7fef
LW
1817 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1818 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW
1819 }
1820 return l;
1821#endif
1822#endif
1823}
1824
ffed7fef 1825#endif /* BYTEORDER != 0x4321 */
988174c1
LW
1826#endif /* MYSWAP */
1827
1828/*
1829 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1830 * If these functions are defined,
1831 * the BYTEORDER is neither 0x1234 nor 0x4321.
1832 * However, this is not assumed.
1833 * -DWS
1834 */
1835
1836#define HTOV(name,type) \
1837 type \
ba106d47 1838 name (register type n) \
988174c1
LW
1839 { \
1840 union { \
1841 type value; \
1842 char c[sizeof(type)]; \
1843 } u; \
79072805
LW
1844 register I32 i; \
1845 register I32 s; \
988174c1
LW
1846 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1847 u.c[i] = (n >> s) & 0xFF; \
1848 } \
1849 return u.value; \
1850 }
1851
1852#define VTOH(name,type) \
1853 type \
ba106d47 1854 name (register type n) \
988174c1
LW
1855 { \
1856 union { \
1857 type value; \
1858 char c[sizeof(type)]; \
1859 } u; \
79072805
LW
1860 register I32 i; \
1861 register I32 s; \
988174c1
LW
1862 u.value = n; \
1863 n = 0; \
1864 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
1865 n += (u.c[i] & 0xFF) << s; \
1866 } \
1867 return n; \
1868 }
1869
1870#if defined(HAS_HTOVS) && !defined(htovs)
1871HTOV(htovs,short)
1872#endif
1873#if defined(HAS_HTOVL) && !defined(htovl)
1874HTOV(htovl,long)
1875#endif
1876#if defined(HAS_VTOHS) && !defined(vtohs)
1877VTOH(vtohs,short)
1878#endif
1879#if defined(HAS_VTOHL) && !defined(vtohl)
1880VTOH(vtohl,long)
1881#endif
a687059c 1882
4a7d1889
NIS
1883PerlIO *
1884Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
1885{
2986a63f 1886#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
1f852d0d
NIS
1887 int p[2];
1888 register I32 This, that;
1889 register Pid_t pid;
1890 SV *sv;
1891 I32 did_pipes = 0;
1892 int pp[2];
1893
1894 PERL_FLUSHALL_FOR_CHILD;
1895 This = (*mode == 'w');
1896 that = !This;
1897 if (PL_tainting) {
1898 taint_env();
1899 taint_proper("Insecure %s%s", "EXEC");
1900 }
1901 if (PerlProc_pipe(p) < 0)
1902 return Nullfp;
1903 /* Try for another pipe pair for error return */
1904 if (PerlProc_pipe(pp) >= 0)
1905 did_pipes = 1;
52e18b1f 1906 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
1907 if (errno != EAGAIN) {
1908 PerlLIO_close(p[This]);
1909 if (did_pipes) {
1910 PerlLIO_close(pp[0]);
1911 PerlLIO_close(pp[1]);
1912 }
1913 return Nullfp;
1914 }
1915 sleep(5);
1916 }
1917 if (pid == 0) {
1918 /* Child */
1f852d0d
NIS
1919#undef THIS
1920#undef THAT
1921#define THIS that
1922#define THAT This
1923 /* Close parent's end of _the_ pipe */
1924 PerlLIO_close(p[THAT]);
1925 /* Close parent's end of error status pipe (if any) */
1926 if (did_pipes) {
1927 PerlLIO_close(pp[0]);
1928#if defined(HAS_FCNTL) && defined(F_SETFD)
1929 /* Close error pipe automatically if exec works */
1930 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
1931#endif
1932 }
1933 /* Now dup our end of _the_ pipe to right position */
1934 if (p[THIS] != (*mode == 'r')) {
1935 PerlLIO_dup2(p[THIS], *mode == 'r');
1936 PerlLIO_close(p[THIS]);
1937 }
1938#if !defined(HAS_FCNTL) || !defined(F_SETFD)
1939 /* No automatic close - do it by hand */
b7953727
JH
1940# ifndef NOFILE
1941# define NOFILE 20
1942# endif
a080fe3d
NIS
1943 {
1944 int fd;
1945
1946 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
1947 if (fd != pp[1])
1948 PerlLIO_close(fd);
1949 }
1f852d0d
NIS
1950 }
1951#endif
1952 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
1953 PerlProc__exit(1);
1954#undef THIS
1955#undef THAT
1956 }
1957 /* Parent */
52e18b1f 1958 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
1959 /* Close child's end of pipe */
1960 PerlLIO_close(p[that]);
1961 if (did_pipes)
1962 PerlLIO_close(pp[1]);
1963 /* Keep the lower of the two fd numbers */
1964 if (p[that] < p[This]) {
1965 PerlLIO_dup2(p[This], p[that]);
1966 PerlLIO_close(p[This]);
1967 p[This] = p[that];
1968 }
1969 LOCK_FDPID_MUTEX;
1970 sv = *av_fetch(PL_fdpid,p[This],TRUE);
1971 UNLOCK_FDPID_MUTEX;
1972 (void)SvUPGRADE(sv,SVt_IV);
1973 SvIVX(sv) = pid;
1974 PL_forkprocess = pid;
1975 /* If we managed to get status pipe check for exec fail */
1976 if (did_pipes && pid > 0) {
1977 int errkid;
1978 int n = 0, n1;
1979
1980 while (n < sizeof(int)) {
1981 n1 = PerlLIO_read(pp[0],
1982 (void*)(((char*)&errkid)+n),
1983 (sizeof(int)) - n);
1984 if (n1 <= 0)
1985 break;
1986 n += n1;
1987 }
1988 PerlLIO_close(pp[0]);
1989 did_pipes = 0;
1990 if (n) { /* Error */
1991 int pid2, status;
8c51524e 1992 PerlLIO_close(p[This]);
1f852d0d
NIS
1993 if (n != sizeof(int))
1994 Perl_croak(aTHX_ "panic: kid popen errno read");
1995 do {
1996 pid2 = wait4pid(pid, &status, 0);
1997 } while (pid2 == -1 && errno == EINTR);
1998 errno = errkid; /* Propagate errno from kid */
1999 return Nullfp;
2000 }
2001 }
2002 if (did_pipes)
2003 PerlLIO_close(pp[0]);
2004 return PerlIO_fdopen(p[This], mode);
2005#else
4a7d1889
NIS
2006 Perl_croak(aTHX_ "List form of piped open not implemented");
2007 return (PerlIO *) NULL;
1f852d0d 2008#endif
4a7d1889
NIS
2009}
2010
5f05dabc 2011 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2012#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2013PerlIO *
864dbfa3 2014Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW
2015{
2016 int p[2];
8ac85365 2017 register I32 This, that;
d8a83dd3 2018 register Pid_t pid;
79072805 2019 SV *sv;
1738f5c4 2020 I32 doexec = strNE(cmd,"-");
e446cec8
IZ
2021 I32 did_pipes = 0;
2022 int pp[2];
a687059c 2023
45bc9206 2024 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2025#ifdef OS2
2026 if (doexec) {
23da6c43 2027 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2028 }
a1d180c4 2029#endif
8ac85365
NIS
2030 This = (*mode == 'w');
2031 that = !This;
3280af22 2032 if (doexec && PL_tainting) {
bbce6d69
PP
2033 taint_env();
2034 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2035 }
c2267164
IZ
2036 if (PerlProc_pipe(p) < 0)
2037 return Nullfp;
e446cec8
IZ
2038 if (doexec && PerlProc_pipe(pp) >= 0)
2039 did_pipes = 1;
52e18b1f 2040 while ((pid = PerlProc_fork()) < 0) {
a687059c 2041 if (errno != EAGAIN) {
6ad3d225 2042 PerlLIO_close(p[This]);
e446cec8
IZ
2043 if (did_pipes) {
2044 PerlLIO_close(pp[0]);
2045 PerlLIO_close(pp[1]);
2046 }
a687059c 2047 if (!doexec)
cea2e8a9 2048 Perl_croak(aTHX_ "Can't fork");
a687059c
LW
2049 return Nullfp;
2050 }
2051 sleep(5);
2052 }
2053 if (pid == 0) {
79072805
LW
2054 GV* tmpgv;
2055
30ac6d9b
GS
2056#undef THIS
2057#undef THAT
a687059c 2058#define THIS that
8ac85365 2059#define THAT This
6ad3d225 2060 PerlLIO_close(p[THAT]);
e446cec8
IZ
2061 if (did_pipes) {
2062 PerlLIO_close(pp[0]);
2063#if defined(HAS_FCNTL) && defined(F_SETFD)
2064 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2065#endif
2066 }
a687059c 2067 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2068 PerlLIO_dup2(p[THIS], *mode == 'r');
2069 PerlLIO_close(p[THIS]);
a687059c 2070 }
4435c477 2071#ifndef OS2
a687059c 2072 if (doexec) {
a0d0e21e 2073#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2074 int fd;
2075
2076#ifndef NOFILE
2077#define NOFILE 20
2078#endif
a080fe3d
NIS
2079 {
2080 int fd;
2081
2082 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2083 if (fd != pp[1])
2084 PerlLIO_close(fd);
2085 }
ae986130 2086#endif
a080fe3d
NIS
2087 /* may or may not use the shell */
2088 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2089 PerlProc__exit(1);
a687059c 2090 }
4435c477 2091#endif /* defined OS2 */
de3bb511 2092 /*SUPPRESS 560*/
306196c3
MS
2093 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
2094 SvREADONLY_off(GvSV(tmpgv));
7766f137 2095 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
306196c3
MS
2096 SvREADONLY_on(GvSV(tmpgv));
2097 }
3280af22
NIS
2098 PL_forkprocess = 0;
2099 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW
2100 return Nullfp;
2101#undef THIS
2102#undef THAT
2103 }
52e18b1f 2104 do_execfree(); /* free any memory malloced by child on fork */
6ad3d225 2105 PerlLIO_close(p[that]);
e446cec8
IZ
2106 if (did_pipes)
2107 PerlLIO_close(pp[1]);
8ac85365 2108 if (p[that] < p[This]) {
6ad3d225
GS
2109 PerlLIO_dup2(p[This], p[that]);
2110 PerlLIO_close(p[This]);
8ac85365 2111 p[This] = p[that];
62b28dd9 2112 }
4755096e 2113 LOCK_FDPID_MUTEX;
3280af22 2114 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2115 UNLOCK_FDPID_MUTEX;
a0d0e21e 2116 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2117 SvIVX(sv) = pid;
3280af22 2118 PL_forkprocess = pid;
e446cec8
IZ
2119 if (did_pipes && pid > 0) {
2120 int errkid;
2121 int n = 0, n1;
2122
2123 while (n < sizeof(int)) {
2124 n1 = PerlLIO_read(pp[0],
2125 (void*)(((char*)&errkid)+n),
2126 (sizeof(int)) - n);
2127 if (n1 <= 0)
2128 break;
2129 n += n1;
2130 }
2f96c702
IZ
2131 PerlLIO_close(pp[0]);
2132 did_pipes = 0;
e446cec8 2133 if (n) { /* Error */
faa466a7 2134 int pid2, status;
8c51524e 2135 PerlLIO_close(p[This]);
e446cec8 2136 if (n != sizeof(int))
cea2e8a9 2137 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG
2138 do {
2139 pid2 = wait4pid(pid, &status, 0);
2140 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ
2141 errno = errkid; /* Propagate errno from kid */
2142 return Nullfp;
2143 }
2144 }
2145 if (did_pipes)
2146 PerlLIO_close(pp[0]);
8ac85365 2147 return PerlIO_fdopen(p[This], mode);
a687059c 2148}
7c0587c8 2149#else
2b96b0a5 2150#if defined(atarist)
7c0587c8 2151FILE *popen();
760ac839 2152PerlIO *
864dbfa3 2153Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2154{
45bc9206 2155 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS
2156 /* Call system's popen() to get a FILE *, then import it.
2157 used 0 for 2nd parameter to PerlIO_importFILE;
2158 apparently not used
2159 */
2160 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8 2161}
2b96b0a5
JH
2162#else
2163#if defined(DJGPP)
2164FILE *djgpp_popen();
2165PerlIO *
2166Perl_my_popen(pTHX_ char *cmd, char *mode)
2167{
2168 PERL_FLUSHALL_FOR_CHILD;
2169 /* Call system's popen() to get a FILE *, then import it.
2170 used 0 for 2nd parameter to PerlIO_importFILE;
2171 apparently not used
2172 */
2173 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2174}
2175#endif
7c0587c8
LW
2176#endif
2177
2178#endif /* !DOSISH */
a687059c 2179
52e18b1f
GS
2180/* this is called in parent before the fork() */
2181void
2182Perl_atfork_lock(void)
2183{
4d1ff10f 2184#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
52e18b1f
GS
2185 /* locks must be held in locking order (if any) */
2186# ifdef MYMALLOC
2187 MUTEX_LOCK(&PL_malloc_mutex);
2188# endif
2189 OP_REFCNT_LOCK;
2190#endif
2191}
2192
2193/* this is called in both parent and child after the fork() */
2194void
2195Perl_atfork_unlock(void)
2196{
4d1ff10f 2197#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
52e18b1f
GS
2198 /* locks must be released in same order as in atfork_lock() */
2199# ifdef MYMALLOC
2200 MUTEX_UNLOCK(&PL_malloc_mutex);
2201# endif
2202 OP_REFCNT_UNLOCK;
2203#endif
2204}
2205
2206Pid_t
2207Perl_my_fork(void)
2208{
2209#if defined(HAS_FORK)
2210 Pid_t pid;
4d1ff10f 2211#if (defined(USE_5005THREADS) || defined(USE_ITHREADS)) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2212 atfork_lock();
2213 pid = fork();
2214 atfork_unlock();
2215#else
2216 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2217 * handlers elsewhere in the code */
2218 pid = fork();
2219#endif
2220 return pid;
2221#else
2222 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2223 Perl_croak_nocontext("fork() not available");
b961a566 2224 return 0;
52e18b1f
GS
2225#endif /* HAS_FORK */
2226}
2227
748a9306 2228#ifdef DUMP_FDS
35ff7856 2229void
864dbfa3 2230Perl_dump_fds(pTHX_ char *s)
ae986130
LW
2231{
2232 int fd;
2233 struct stat tmpstatbuf;
2234
bf49b057 2235 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2236 for (fd = 0; fd < 32; fd++) {
6ad3d225 2237 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2238 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2239 }
bf49b057 2240 PerlIO_printf(Perl_debug_log,"\n");
ae986130 2241}
35ff7856 2242#endif /* DUMP_FDS */
ae986130 2243
fe14fcc3 2244#ifndef HAS_DUP2
fec02dd3 2245int
ba106d47 2246dup2(int oldfd, int newfd)
a687059c 2247{
a0d0e21e 2248#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2249 if (oldfd == newfd)
2250 return oldfd;
6ad3d225 2251 PerlLIO_close(newfd);
fec02dd3 2252 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2253#else
fc36a67e
PP
2254#define DUP2_MAX_FDS 256
2255 int fdtmp[DUP2_MAX_FDS];
79072805 2256 I32 fdx = 0;
ae986130
LW
2257 int fd;
2258
fe14fcc3 2259 if (oldfd == newfd)
fec02dd3 2260 return oldfd;
6ad3d225 2261 PerlLIO_close(newfd);
fc36a67e 2262 /* good enough for low fd's... */
6ad3d225 2263 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2264 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2265 PerlLIO_close(fd);
fc36a67e
PP
2266 fd = -1;
2267 break;
2268 }
ae986130 2269 fdtmp[fdx++] = fd;
fc36a67e 2270 }
ae986130 2271 while (fdx > 0)
6ad3d225 2272 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2273 return fd;
62b28dd9 2274#endif
a687059c
LW
2275}
2276#endif
2277
64ca3a65 2278#ifndef PERL_MICRO
ff68c719
PP
2279#ifdef HAS_SIGACTION
2280
2281Sighandler_t
864dbfa3 2282Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719
PP
2283{
2284 struct sigaction act, oact;
2285
2286 act.sa_handler = handler;
2287 sigemptyset(&act.sa_mask);
2288 act.sa_flags = 0;
2289#ifdef SA_RESTART
0dd95eb2 2290#if defined(PERL_OLD_SIGNALS)
ff68c719
PP
2291 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2292#endif
0a8e0eff 2293#endif
85264bed
CS
2294#ifdef SA_NOCLDWAIT
2295 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2296 act.sa_flags |= SA_NOCLDWAIT;
2297#endif
ff68c719 2298 if (sigaction(signo, &act, &oact) == -1)
36477c24 2299 return SIG_ERR;
ff68c719 2300 else
36477c24 2301 return oact.sa_handler;
ff68c719
PP
2302}
2303
2304Sighandler_t
864dbfa3 2305Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2306{
2307 struct sigaction oact;
2308
2309 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2310 return SIG_ERR;
2311 else
2312 return oact.sa_handler;
2313}
2314
2315int
864dbfa3 2316Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719
PP
2317{
2318 struct sigaction act;
2319
2320 act.sa_handler = handler;
2321 sigemptyset(&act.sa_mask);
2322 act.sa_flags = 0;
2323#ifdef SA_RESTART
0dd95eb2 2324#if defined(PERL_OLD_SIGNALS)
ff68c719
PP
2325 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2326#endif
0a8e0eff 2327#endif
85264bed
CS
2328#ifdef SA_NOCLDWAIT
2329 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2330 act.sa_flags |= SA_NOCLDWAIT;
2331#endif
ff68c719
PP
2332 return sigaction(signo, &act, save);
2333}
2334
2335int
864dbfa3 2336Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719
PP
2337{
2338 return sigaction(signo, save, (struct sigaction *)NULL);
2339}
2340
2341#else /* !HAS_SIGACTION */
2342
2343Sighandler_t
864dbfa3 2344Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2345{
6ad3d225 2346 return PerlProc_signal(signo, handler);
ff68c719
PP
2347}
2348
df3728a2
JH
2349static int sig_trapped; /* XXX signals are process-wide anyway, so we
2350 ignore the implications of this for threading */
ff68c719
PP
2351
2352static
2353Signal_t
4e35701f 2354sig_trap(int signo)
ff68c719
PP
2355{
2356 sig_trapped++;
2357}
2358
2359Sighandler_t
864dbfa3 2360Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2361{
2362 Sighandler_t oldsig;
2363
2364 sig_trapped = 0;
6ad3d225
GS
2365 oldsig = PerlProc_signal(signo, sig_trap);
2366 PerlProc_signal(signo, oldsig);
ff68c719 2367 if (sig_trapped)
7766f137 2368 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2369 return oldsig;
2370}
2371
2372int
864dbfa3 2373Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2374{
6ad3d225 2375 *save = PerlProc_signal(signo, handler);
ff68c719
PP
2376 return (*save == SIG_ERR) ? -1 : 0;
2377}
2378
2379int
864dbfa3 2380Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2381{
6ad3d225 2382 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719
PP
2383}
2384
2385#endif /* !HAS_SIGACTION */
64ca3a65 2386#endif /* !PERL_MICRO */
ff68c719 2387
5f05dabc 2388 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2389#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2390I32
864dbfa3 2391Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2392{
ff68c719 2393 Sigsave_t hstat, istat, qstat;
a687059c 2394 int status;
a0d0e21e 2395 SV **svp;
d8a83dd3
JH
2396 Pid_t pid;
2397 Pid_t pid2;
03136e13 2398 bool close_failed;
b7953727 2399 int saved_errno = 0;
03136e13
CS
2400#ifdef VMS
2401 int saved_vaxc_errno;
2402#endif
22fae026
TM
2403#ifdef WIN32
2404 int saved_win32_errno;
2405#endif
a687059c 2406
4755096e 2407 LOCK_FDPID_MUTEX;
3280af22 2408 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2409 UNLOCK_FDPID_MUTEX;
25d92023 2410 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2411 SvREFCNT_dec(*svp);
3280af22 2412 *svp = &PL_sv_undef;
ddcf38b7
IZ
2413#ifdef OS2
2414 if (pid == -1) { /* Opened by popen. */
2415 return my_syspclose(ptr);
2416 }
a1d180c4 2417#endif
03136e13
CS
2418 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2419 saved_errno = errno;
2420#ifdef VMS
2421 saved_vaxc_errno = vaxc$errno;
2422#endif
22fae026
TM
2423#ifdef WIN32
2424 saved_win32_errno = GetLastError();
2425#endif
03136e13 2426 }
7c0587c8 2427#ifdef UTS
6ad3d225 2428 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2429#endif
64ca3a65 2430#ifndef PERL_MICRO
ff68c719
PP
2431 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2432 rsignal_save(SIGINT, SIG_IGN, &istat);
2433 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
64ca3a65 2434#endif
748a9306 2435 do {
1d3434b8
GS
2436 pid2 = wait4pid(pid, &status, 0);
2437 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2438#ifndef PERL_MICRO
ff68c719
PP
2439 rsignal_restore(SIGHUP, &hstat);
2440 rsignal_restore(SIGINT, &istat);
2441 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2442#endif
03136e13
CS
2443 if (close_failed) {
2444 SETERRNO(saved_errno, saved_vaxc_errno);
2445 return -1;
2446 }
1d3434b8 2447 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2448}
4633a7c4
LW
2449#endif /* !DOSISH */
2450
2986a63f 2451#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
79072805 2452I32
d8a83dd3 2453Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2454{
cddd4526 2455 I32 result;
b7953727
JH
2456 if (!pid)
2457 return -1;
2458#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2459 {
79072805
LW
2460 SV *sv;
2461 SV** svp;
fc36a67e 2462 char spid[TYPE_CHARS(int)];
20188a90 2463
20188a90 2464 if (pid > 0) {
7b0972df 2465 sprintf(spid, "%"IVdf, (IV)pid);
3280af22
NIS
2466 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2467 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2468 *statusp = SvIVX(*svp);
3280af22 2469 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW
2470 return pid;
2471 }
2472 }
2473 else {
79072805 2474 HE *entry;
20188a90 2475
3280af22 2476 hv_iterinit(PL_pidstatus);
155aba94 2477 if ((entry = hv_iternext(PL_pidstatus))) {
a0d0e21e 2478 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2479 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2480 *statusp = SvIVX(sv);
7b0972df 2481 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2482 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW
2483 return pid;
2484 }
b7953727 2485 }
20188a90 2486 }
68a29c53 2487#endif
79072805 2488#ifdef HAS_WAITPID
367f3c24
IZ
2489# ifdef HAS_WAITPID_RUNTIME
2490 if (!HAS_WAITPID_RUNTIME)
2491 goto hard_way;
2492# endif
cddd4526 2493 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 2494 goto finish;
367f3c24
IZ
2495#endif
2496#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
cddd4526 2497 result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
dfcfdb64 2498 goto finish;
367f3c24
IZ
2499#endif
2500#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2501 hard_way:
a0d0e21e 2502 {
a0d0e21e 2503 if (flags)
cea2e8a9 2504 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2505 else {
76e3520e 2506 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
2507 pidgone(result,*statusp);
2508 if (result < 0)
2509 *statusp = -1;
2510 }
a687059c
LW
2511 }
2512#endif
dfcfdb64 2513 finish:
cddd4526
NIS
2514 if (result < 0 && errno == EINTR) {
2515 PERL_ASYNC_CHECK();
2516 }
2517 return result;
a687059c 2518}
2986a63f 2519#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 2520
7c0587c8 2521void
de3bb511 2522/*SUPPRESS 590*/
d8a83dd3 2523Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2524{
79072805 2525 register SV *sv;
fc36a67e 2526 char spid[TYPE_CHARS(int)];
a687059c 2527
7b0972df 2528 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2529 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2530 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2531 SvIVX(sv) = status;
20188a90 2532 return;
a687059c
LW
2533}
2534
2b96b0a5 2535#if defined(atarist) || defined(OS2)
7c0587c8 2536int pclose();
ddcf38b7
IZ
2537#ifdef HAS_FORK
2538int /* Cannot prototype with I32
2539 in os2ish.h. */
ba106d47 2540my_syspclose(PerlIO *ptr)
ddcf38b7 2541#else
79072805 2542I32
864dbfa3 2543Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2544#endif
a687059c 2545{
760ac839
LW
2546 /* Needs work for PerlIO ! */
2547 FILE *f = PerlIO_findFILE(ptr);
2548 I32 result = pclose(f);
2b96b0a5
JH
2549 PerlIO_releaseFILE(ptr,f);
2550 return result;
2551}
2552#endif
2553
933fea7f 2554#if defined(DJGPP)
2b96b0a5
JH
2555int djgpp_pclose();
2556I32
2557Perl_my_pclose(pTHX_ PerlIO *ptr)
2558{
2559 /* Needs work for PerlIO ! */
2560 FILE *f = PerlIO_findFILE(ptr);
2561 I32 result = djgpp_pclose(f);
933fea7f 2562 result = (result << 8) & 0xff00;
760ac839
LW
2563 PerlIO_releaseFILE(ptr,f);
2564 return result;
a687059c 2565}
7c0587c8 2566#endif
9f68db38
LW
2567
2568void
864dbfa3 2569Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2570{
79072805 2571 register I32 todo;
08105a92 2572 register const char *frombase = from;
9f68db38
LW
2573
2574 if (len == 1) {
08105a92 2575 register const char c = *from;
9f68db38 2576 while (count-- > 0)
5926133d 2577 *to++ = c;
9f68db38
LW
2578 return;
2579 }
2580 while (count-- > 0) {
2581 for (todo = len; todo > 0; todo--) {
2582 *to++ = *from++;
2583 }
2584 from = frombase;
2585 }
2586}
0f85fab0 2587
fe14fcc3 2588#ifndef HAS_RENAME
79072805 2589I32
864dbfa3 2590Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 2591{
93a17b20
LW
2592 char *fa = strrchr(a,'/');
2593 char *fb = strrchr(b,'/');
62b28dd9
LW
2594 struct stat tmpstatbuf1;
2595 struct stat tmpstatbuf2;
46fc3d4c 2596 SV *tmpsv = sv_newmortal();
62b28dd9
LW
2597
2598 if (fa)
2599 fa++;
2600 else
2601 fa = a;
2602 if (fb)
2603 fb++;
2604 else
2605 fb = b;
2606 if (strNE(a,b))
2607 return FALSE;
2608 if (fa == a)
46fc3d4c 2609 sv_setpv(tmpsv, ".");
62b28dd9 2610 else
46fc3d4c 2611 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 2612 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
2613 return FALSE;
2614 if (fb == b)
46fc3d4c 2615 sv_setpv(tmpsv, ".");
62b28dd9 2616 else
46fc3d4c 2617 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 2618 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
2619 return FALSE;
2620 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
2621 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
2622}
fe14fcc3
LW
2623#endif /* !HAS_RENAME */
2624
491527d0 2625char*
864dbfa3 2626Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0 2627{
491527d0
GS
2628 char *xfound = Nullch;
2629 char *xfailed = Nullch;
0f31cffe 2630 char tmpbuf[MAXPATHLEN];
491527d0 2631 register char *s;
5f74f29c 2632 I32 len = 0;
491527d0
GS
2633 int retval;
2634#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
2635# define SEARCH_EXTS ".bat", ".cmd", NULL
2636# define MAX_EXT_LEN 4
2637#endif
2638#ifdef OS2
2639# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
2640# define MAX_EXT_LEN 4
2641#endif
2642#ifdef VMS
2643# define SEARCH_EXTS ".pl", ".com", NULL
2644# define MAX_EXT_LEN 4
2645#endif
2646 /* additional extensions to try in each dir if scriptname not found */
2647#ifdef SEARCH_EXTS
2648 char *exts[] = { SEARCH_EXTS };
2649 char **ext = search_ext ? search_ext : exts;
2650 int extidx = 0, i = 0;
2651 char *curext = Nullch;
2652#else
2653# define MAX_EXT_LEN 0
2654#endif
2655
2656 /*
2657 * If dosearch is true and if scriptname does not contain path
2658 * delimiters, search the PATH for scriptname.
2659 *
2660 * If SEARCH_EXTS is also defined, will look for each
2661 * scriptname{SEARCH_EXTS} whenever scriptname is not found
2662 * while searching the PATH.
2663 *
2664 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
2665 * proceeds as follows:
2666 * If DOSISH or VMSISH:
2667 * + look for ./scriptname{,.foo,.bar}
2668 * + search the PATH for scriptname{,.foo,.bar}
2669 *
2670 * If !DOSISH:
2671 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
2672 * this will not look in '.' if it's not in the PATH)
2673 */
84486fc6 2674 tmpbuf[0] = '\0';
491527d0
GS
2675
2676#ifdef VMS
2677# ifdef ALWAYS_DEFTYPES
2678 len = strlen(scriptname);
2679 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
2680 int hasdir, idx = 0, deftypes = 1;
2681 bool seen_dot = 1;
2682
2683 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
2684# else
2685 if (dosearch) {
2686 int hasdir, idx = 0, deftypes = 1;
2687 bool seen_dot = 1;
2688
2689 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
2690# endif
2691 /* The first time through, just add SEARCH_EXTS to whatever we
2692 * already have, so we can check for default file types. */
2693 while (deftypes ||
84486fc6 2694 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
2695 {
2696 if (deftypes) {
2697 deftypes = 0;
84486fc6 2698 *tmpbuf = '\0';
491527d0 2699 }
84486fc6
GS
2700 if ((strlen(tmpbuf) + strlen(scriptname)
2701 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 2702 continue; /* don't search dir with too-long name */
84486fc6 2703 strcat(tmpbuf, scriptname);
491527d0
GS
2704#else /* !VMS */
2705
2706#ifdef DOSISH
2707 if (strEQ(scriptname, "-"))
2708 dosearch = 0;
2709 if (dosearch) { /* Look in '.' first. */
2710 char *cur = scriptname;
2711#ifdef SEARCH_EXTS
2712 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
2713 while (ext[i])
2714 if (strEQ(ext[i++],curext)) {
2715 extidx = -1; /* already has an ext */
2716 break;
2717 }
2718 do {
2719#endif
2720 DEBUG_p(PerlIO_printf(Perl_debug_log,
2721 "Looking for %s\n",cur));
017f25f1
IZ
2722 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
2723 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
2724 dosearch = 0;
2725 scriptname = cur;
2726#ifdef SEARCH_EXTS
2727 break;
2728#endif
2729 }
2730#ifdef SEARCH_EXTS
2731 if (cur == scriptname) {
2732 len = strlen(scriptname);
84486fc6 2733 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 2734 break;
84486fc6 2735 cur = strcpy(tmpbuf, scriptname);
491527d0
GS
2736 }
2737 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 2738 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS
2739#endif
2740 }
2741#endif
2742
cd39f2b6
JH
2743#ifdef MACOS_TRADITIONAL
2744 if (dosearch && !strchr(scriptname, ':') &&
2745 (s = PerlEnv_getenv("Commands")))
2746#else
491527d0
GS
2747 if (dosearch && !strchr(scriptname, '/')
2748#ifdef DOSISH
2749 && !strchr(scriptname, '\\')
2750#endif
cd39f2b6
JH
2751 && (s = PerlEnv_getenv("PATH")))
2752#endif
2753 {
491527d0
GS
2754 bool seen_dot = 0;
2755
3280af22
NIS
2756 PL_bufend = s + strlen(s);
2757 while (s < PL_bufend) {
cd39f2b6
JH
2758#ifdef MACOS_TRADITIONAL
2759 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
2760 ',',
2761 &len);
2762#else
491527d0
GS
2763#if defined(atarist) || defined(DOSISH)
2764 for (len = 0; *s
2765# ifdef atarist
2766 && *s != ','
2767# endif
2768 && *s != ';'; len++, s++) {
84486fc6
GS
2769 if (len < sizeof tmpbuf)
2770 tmpbuf[len] = *s;
491527d0 2771 }
84486fc6
GS
2772 if (len < sizeof tmpbuf)
2773 tmpbuf[len] = '\0';
491527d0 2774#else /* ! (atarist || DOSISH) */
3280af22 2775 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS
2776 ':',
2777 &len);
2778#endif /* ! (atarist || DOSISH) */
cd39f2b6 2779#endif /* MACOS_TRADITIONAL */
3280af22 2780 if (s < PL_bufend)
491527d0 2781 s++;
84486fc6 2782 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 2783 continue; /* don't search dir with too-long name */
cd39f2b6
JH
2784#ifdef MACOS_TRADITIONAL
2785 if (len && tmpbuf[len - 1] != ':')
2786 tmpbuf[len++] = ':';
2787#else
491527d0 2788 if (len
61ae2fbf 2789#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS
2790 && tmpbuf[len - 1] != '/'
2791 && tmpbuf[len - 1] != '\\'
491527d0
GS
2792#endif
2793 )
84486fc6
GS
2794 tmpbuf[len++] = '/';
2795 if (len == 2 && tmpbuf[0] == '.')
491527d0 2796 seen_dot = 1;
cd39f2b6 2797#endif
84486fc6 2798 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS
2799#endif /* !VMS */
2800
2801#ifdef SEARCH_EXTS
84486fc6 2802 len = strlen(tmpbuf);
491527d0
GS
2803 if (extidx > 0) /* reset after previous loop */
2804 extidx = 0;
2805 do {
2806#endif
84486fc6 2807 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 2808 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
2809 if (S_ISDIR(PL_statbuf.st_mode)) {
2810 retval = -1;
2811 }
491527d0
GS
2812#ifdef SEARCH_EXTS
2813 } while ( retval < 0 /* not there */
2814 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 2815 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS
2816 );
2817#endif
2818 if (retval < 0)
2819 continue;
3280af22
NIS
2820 if (S_ISREG(PL_statbuf.st_mode)
2821 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 2822#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 2823 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
2824#endif
2825 )
2826 {
84486fc6 2827 xfound = tmpbuf; /* bingo! */
491527d0
GS
2828 break;
2829 }
2830 if (!xfailed)
84486fc6 2831 xfailed = savepv(tmpbuf);
491527d0
GS
2832 }
2833#ifndef DOSISH
017f25f1 2834 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 2835 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 2836 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
2837#endif
2838 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
2839 if (!xfound) {
2840 if (flags & 1) { /* do or die? */
cea2e8a9 2841 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
2842 (xfailed ? "execute" : "find"),
2843 (xfailed ? xfailed : scriptname),
2844 (xfailed ? "" : " on PATH"),
2845 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2846 }
2847 scriptname = Nullch;
2848 }
491527d0
GS
2849 if (xfailed)
2850 Safefree(xfailed);
2851 scriptname = xfound;
2852 }
9ccb31f9 2853 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS
2854}
2855
ba869deb
GS
2856#ifndef PERL_GET_CONTEXT_DEFINED
2857
2858void *
2859Perl_get_context(void)
2860{
4d1ff10f 2861#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
ba869deb
GS
2862# ifdef OLD_PTHREADS_API
2863 pthread_addr_t t;
2864 if (pthread_getspecific(PL_thr_key, &t))
2865 Perl_croak_nocontext("panic: pthread_getspecific");
2866 return (void*)t;
2867# else
bce813aa 2868# ifdef I_MACH_CTHREADS
8b8b35ab 2869 return (void*)cthread_data(cthread_self());
bce813aa 2870# else
8b8b35ab
JH
2871 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
2872# endif
c44d3fdb 2873# endif
ba869deb
GS
2874#else
2875 return (void*)NULL;
2876#endif
2877}
2878
2879void
2880Perl_set_context(void *t)
2881{
4d1ff10f 2882#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
c44d3fdb
GS
2883# ifdef I_MACH_CTHREADS
2884 cthread_set_data(cthread_self(), t);
2885# else
ba869deb
GS
2886 if (pthread_setspecific(PL_thr_key, t))
2887 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 2888# endif
ba869deb
GS
2889#endif
2890}
2891
2892#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 2893
4d1ff10f 2894#ifdef USE_5005THREADS
ba869deb 2895
12ca11f6
MB
2896#ifdef FAKE_THREADS
2897/* Very simplistic scheduler for now */
2898void
2899schedule(void)
2900{
c7848ba1 2901 thr = thr->i.next_run;
12ca11f6
MB
2902}
2903
2904void
864dbfa3 2905Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB
2906{
2907 *cp = 0;
2908}
2909
2910void
864dbfa3 2911Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 2912{
51dd5992 2913 perl_os_thread t;
12ca11f6 2914 perl_cond cond = *cp;
a1d180c4 2915
12ca11f6
MB
2916 if (!cond)
2917 return;
2918 t = cond->thread;
2919 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB
2920 t->i.next_run = thr->i.next_run;
2921 thr->i.next_run->i.prev_run = t;
2922 t->i.prev_run = thr;
2923 thr->i.next_run = t;
2924 thr->i.wait_queue = 0;
12ca11f6
MB
2925 /* Remove from the wait queue */
2926 *cp = cond->next;
2927 Safefree(cond);
2928}
2929
2930void
864dbfa3 2931Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 2932{
51dd5992 2933 perl_os_thread t;
12ca11f6 2934 perl_cond cond, cond_next;
a1d180c4 2935
12ca11f6
MB
2936 for (cond = *cp; cond; cond = cond_next) {
2937 t = cond->thread;
2938 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB
2939 t->i.next_run = thr->i.next_run;
2940 thr->i.next_run->i.prev_run = t;
2941 t->i.prev_run = thr;
2942 thr->i.next_run = t;
2943 thr->i.wait_queue = 0;
12ca11f6
MB
2944 /* Remove from the wait queue */
2945 cond_next = cond->next;
2946 Safefree(cond);
2947 }
2948 *cp = 0;
2949}
2950
2951void
864dbfa3 2952Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB
2953{
2954 perl_cond cond;
2955
c7848ba1 2956 if (thr->i.next_run == thr)
cea2e8a9 2957 Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
a1d180c4 2958
0f15f207 2959 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB
2960 cond->thread = thr;
2961 cond->next = *cp;
2962 *cp = cond;
c7848ba1 2963 thr->i.wait_queue = cond;
12ca11f6 2964 /* Remove ourselves from runnable queue */
c7848ba1
MB
2965 thr->i.next_run->i.prev_run = thr->i.prev_run;
2966 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB
2967}
2968#endif /* FAKE_THREADS */
2969
f93b4edd 2970MAGIC *
864dbfa3 2971Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB
2972{
2973 MAGIC *mg;
a1d180c4 2974
3e209e71 2975 (void)SvUPGRADE(sv, SVt_PVMG);
14befaf4 2976 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB
2977 if (!mg) {
2978 condpair_t *cp;
2979
2980 New(53, cp, 1, condpair_t);
2981 MUTEX_INIT(&cp->mutex);
2982 COND_INIT(&cp->owner_cond);
2983 COND_INIT(&cp->cond);
2984 cp->owner = 0;
1feb2720 2985 LOCK_CRED_MUTEX; /* XXX need separate mutex? */
14befaf4 2986 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB
2987 if (mg) {
2988 /* someone else beat us to initialising it */
1feb2720 2989 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
f93b4edd
MB
2990 MUTEX_DESTROY(&cp->mutex);
2991 COND_DESTROY(&cp->owner_cond);
2992 COND_DESTROY(&cp->cond);
2993 Safefree(cp);
2994 }
2995 else {
14befaf4 2996 sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0);
f93b4edd
MB
2997 mg = SvMAGIC(sv);
2998 mg->mg_ptr = (char *)cp;
565764a8 2999 mg->mg_len = sizeof(cp);
1feb2720 3000 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
bf49b057 3001 DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log,
a674cc95 3002 "%p: condpair_magic %p\n", thr, sv)));
f93b4edd
MB
3003 }
3004 }
3005 return mg;
3006}
a863c7d1 3007
3d35f11b 3008SV *
4755096e 3009Perl_sv_lock(pTHX_ SV *osv)
3d35f11b
GS
3010{
3011 MAGIC *mg;
3012 SV *sv = osv;
3013
631cfb58 3014 LOCK_SV_LOCK_MUTEX;
3d35f11b
GS
3015 if (SvROK(sv)) {
3016 sv = SvRV(sv);
3d35f11b
GS
3017 }
3018
3019 mg = condpair_magic(sv);
3020 MUTEX_LOCK(MgMUTEXP(mg));
3021 if (MgOWNER(mg) == thr)
3022 MUTEX_UNLOCK(MgMUTEXP(mg));
4755096e 3023 else {
3d35f11b
GS
3024 while (MgOWNER(mg))
3025 COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
3026 MgOWNER(mg) = thr;
4755096e
GS
3027 DEBUG_S(PerlIO_printf(Perl_debug_log,
3028 "0x%"UVxf": Perl_lock lock 0x%"UVxf"\n",
a674cc95 3029 PTR2UV(thr), PTR2UV(sv)));
3d35f11b
GS
3030 MUTEX_UNLOCK(MgMUTEXP(mg));
3031 SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
3032 }
631cfb58 3033 UNLOCK_SV_LOCK_MUTEX;
4755096e 3034 return sv;
3d35f11b
GS
3035}
3036
a863c7d1 3037/*
199100c8
MB
3038 * Make a new perl thread structure using t as a prototype. Some of the
3039 * fields for the new thread are copied from the prototype thread, t,
3040 * so t should not be running in perl at the time this function is
3041 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
3042 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 3043 */
52e1cb5e 3044struct perl_thread *
864dbfa3 3045Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 3046{
c5be433b 3047#if !defined(PERL_IMPLICIT_CONTEXT)
52e1cb5e 3048 struct perl_thread *thr;
cea2e8a9 3049#endif
a863c7d1 3050 SV *sv;
199100c8
MB
3051 SV **svp;
3052 I32 i;
3053
79cb57f6 3054 sv = newSVpvn("", 0);
52e1cb5e
JH
3055 SvGROW(sv, sizeof(struct perl_thread) + 1);
3056 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 3057 thr = (Thread) SvPVX(sv);
949ced2d 3058#ifdef DEBUGGING
52e1cb5e 3059 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS
3060 PL_markstack = 0;
3061 PL_scopestack = 0;
3062 PL_savestack = 0;
3063 PL_retstack = 0;
3064 PL_dirty = 0;
3065 PL_localizing = 0;
949ced2d 3066 Zero(&PL_hv_fetch_ent_mh, 1, HE);
d0e9ca0c
HS
3067 PL_efloatbuf = (char*)NULL;
3068 PL_efloatsize = 0;
949ced2d
GS
3069#else
3070 Zero(thr, 1, struct perl_thread);
3071#endif
199100c8
MB
3072
3073 thr->oursv = sv;
cea2e8a9 3074 init_stacks();
a863c7d1 3075
533c011a 3076 PL_curcop = &PL_compiling;
c5be433b 3077 thr->interp = t->interp;
199100c8 3078 thr->cvcache = newHV();
54b9620d 3079 thr->threadsv = newAV();
a863c7d1 3080 thr->specific = newAV();
79cb57f6 3081 thr->errsv = newSVpvn("", 0);
a863c7d1 3082 thr->flags = THRf_R_JOINABLE;
8dcd6f7b 3083 thr->thr_done = 0;
a863c7d1 3084 MUTEX_INIT(&thr->mutex);
199100c8 3085
5c831c24 3086 JMPENV_BOOTSTRAP;
533c011a 3087
6dc8a9e4 3088 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */
533c011a
NIS
3089 PL_restartop = 0;
3090
b099ddc0 3091 PL_statname = NEWSV(66,0);
5a844595 3092 PL_errors = newSVpvn("", 0);
b099ddc0 3093 PL_maxscream = -1;
0b94c7bb
GS
3094 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
3095 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
3096 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
3097 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
3098 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
b099ddc0
GS
3099 PL_regindent = 0;
3100 PL_reginterp_cnt = 0;
3101 PL_lastscream = Nullsv;
3102 PL_screamfirst = 0;
3103 PL_screamnext = 0;
3104 PL_reg_start_tmp = 0;
3105 PL_reg_start_tmpl = 0;
14ed4b74 3106 PL_reg_poscache = Nullch;
b099ddc0 3107
a2efc822
SC
3108 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
3109
b099ddc0
GS
3110 /* parent thread's data needs to be locked while we make copy */
3111 MUTEX_LOCK(&t->mutex);
3112
14dd3ad8 3113#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 3114 PL_protect = t->Tprotect;
14dd3ad8 3115#endif
312caa8e 3116
b099ddc0
GS
3117 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
3118 PL_defstash = t->Tdefstash; /* XXX maybe these should */
3119 PL_curstash = t->Tcurstash; /* always be set to main? */
3120
6b88bc9c 3121 PL_tainted = t->Ttainted;
84fee439 3122 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
8bfdd7d9 3123 PL_rs = newSVsv(t->Trs);
84fee439 3124 PL_last_in_gv = Nullgv;
7d3de3d5 3125 PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv;
84fee439
NIS
3126 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
3127 PL_chopset = t->Tchopset;
84fee439
NIS
3128 PL_bodytarget = newSVsv(t->Tbodytarget);
3129 PL_toptarget = newSVsv(t->Ttoptarget);
5c831c24
GS
3130 if (t->Tformtarget == t->Ttoptarget)
3131 PL_formtarget = PL_toptarget;
3132 else
3133 PL_formtarget = PL_bodytarget;
533c011a 3134
54b9620d
MB
3135 /* Initialise all per-thread SVs that the template thread used */
3136 svp = AvARRAY(t->threadsv);
93965878 3137 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 3138 if (*svp && *svp != &PL_sv_undef) {
199100c8 3139 SV *sv = newSVsv(*svp);
54b9620d 3140 av_store(thr->threadsv, i, sv);
14befaf4 3141 sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1);
bf49b057 3142 DEBUG_S(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH
3143 "new_struct_thread: copied threadsv %"IVdf" %p->%p\n",
3144 (IV)i, t, thr));
199100c8 3145 }
a1d180c4 3146 }
940cb80d 3147 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 3148
533c011a
NIS
3149 MUTEX_LOCK(&PL_threads_mutex);
3150 PL_nthreads++;
3151 thr->tid = ++PL_threadnum;
199100c8
MB
3152 thr->next = t->next;
3153 thr->prev = t;
3154 t->next = thr;
3155 thr->next->prev = thr;
533c011a 3156 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 3157
b099ddc0
GS
3158 /* done copying parent's state */
3159 MUTEX_UNLOCK(&t->mutex);
3160
a863c7d1 3161#ifdef HAVE_THREAD_INTERN
4f63d024 3162 Perl_init_thread_intern(thr);
a863c7d1 3163#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB
3164 return thr;
3165}
4d1ff10f 3166#endif /* USE_5005THREADS */
760ac839 3167
22239a37
NIS
3168#ifdef PERL_GLOBAL_STRUCT
3169struct perl_vars *
864dbfa3 3170Perl_GetVars(pTHX)
22239a37 3171{
533c011a 3172 return &PL_Vars;
22239a37 3173}
31fb1209
NIS
3174#endif
3175
3176char **
864dbfa3 3177Perl_get_op_names(pTHX)
31fb1209 3178{
22c35a8c 3179 return PL_op_name;
31fb1209
NIS
3180}
3181
3182char **
864dbfa3 3183Perl_get_op_descs(pTHX)
31fb1209 3184{
22c35a8c 3185 return PL_op_desc;
31fb1209 3186}
9e6b2b00
GS
3187
3188char *
864dbfa3 3189Perl_get_no_modify(pTHX)
9e6b2b00 3190{
22c35a8c 3191 return (char*)PL_no_modify;
9e6b2b00
GS
3192}
3193
3194U32 *
864dbfa3 3195Perl_get_opargs(pTHX)
9e6b2b00 3196{
22c35a8c 3197 return PL_opargs;
9e6b2b00 3198}
51aa15f3 3199
0cb96387
GS
3200PPADDR_t*
3201Perl_get_ppaddr(pTHX)
3202{
12ae5dfc 3203 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3204}
3205
a6c40364
GS
3206#ifndef HAS_GETENV_LEN
3207char *
bf4acbe4 3208Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364
GS
3209{
3210 char *env_trans = PerlEnv_getenv(env_elem);
3211 if (env_trans)
3212 *len = strlen(env_trans);
3213 return env_trans;
f675dbe5
CB
3214}
3215#endif
3216
dc9e4912
GS
3217
3218MGVTBL*
864dbfa3 3219Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS
3220{
3221 MGVTBL* result = Null(MGVTBL*);
3222
3223 switch(vtbl_id) {
3224 case want_vtbl_sv:
3225 result = &PL_vtbl_sv;
3226 break;
3227 case want_vtbl_env:
3228 result = &PL_vtbl_env;
3229 break;
3230 case want_vtbl_envelem:
3231 result = &PL_vtbl_envelem;
3232 break;
3233 case want_vtbl_sig:
3234 result = &PL_vtbl_sig;
3235 break;
3236 case want_vtbl_sigelem:
3237 result = &PL_vtbl_sigelem;
3238 break;
3239 case want_vtbl_pack:
3240 result = &PL_vtbl_pack;
3241 break;
3242 case want_vtbl_packelem:
3243 result = &PL_vtbl_packelem;
3244 break;
3245 case want_vtbl_dbline:
3246 result = &PL_vtbl_dbline;
3247 break;
3248 case want_vtbl_isa:
3249 result = &PL_vtbl_isa;
3250 break;
3251 case want_vtbl_isaelem:
3252 result = &PL_vtbl_isaelem;
3253 break;
3254 case want_vtbl_arylen:
3255 result = &PL_vtbl_arylen;
3256 break;
3257 case want_vtbl_glob:
3258 result = &PL_vtbl_glob;
3259 break;
3260 case want_vtbl_mglob:
3261 result = &PL_vtbl_mglob;
3262 break;
3263 case want_vtbl_nkeys:
3264 result = &PL_vtbl_nkeys;
3265 break;
3266 case want_vtbl_taint:
3267 result = &PL_vtbl_taint;
3268 break;
3269 case want_vtbl_substr:
3270 result = &PL_vtbl_substr;
3271 break;
3272 case want_vtbl_vec:
3273 result = &PL_vtbl_vec;
3274 break;
3275 case want_vtbl_pos:
3276 result = &PL_vtbl_pos;
3277 break;
3278 case want_vtbl_bm:
3279 result = &PL_vtbl_bm;
3280 break;
3281 case want_vtbl_fm:
3282 result = &PL_vtbl_fm;
3283 break;
3284 case want_vtbl_uvar:
3285 result = &PL_vtbl_uvar;
3286 break;
4d1ff10f 3287#ifdef USE_5005THREADS
dc9e4912
GS
3288 case want_vtbl_mutex:
3289 result = &PL_vtbl_mutex;
3290 break;
3291#endif
3292 case want_vtbl_defelem:
3293 result = &PL_vtbl_defelem;
3294 break;
3295 case want_vtbl_regexp:
3296 result = &PL_vtbl_regexp;
3297 break;
3298 case want_vtbl_regdata:
3299 result = &PL_vtbl_regdata;
3300 break;
3301 case want_vtbl_regdatum:
3302 result = &PL_vtbl_regdatum;
3303 break;
3c90161d 3304#ifdef USE_LOCALE_COLLATE
dc9e4912
GS
3305 case want_vtbl_collxfrm:
3306 result = &PL_vtbl_collxfrm;
3307 break;
3c90161d 3308#endif
dc9e4912
GS
3309 case want_vtbl_amagic:
3310 result = &PL_vtbl_amagic;
3311 break;
3312 case want_vtbl_amagicelem:
3313 result = &PL_vtbl_amagicelem;
3314 break;
810b8aa5
GS
3315 case want_vtbl_backref:
3316 result = &PL_vtbl_backref;
3317 break;
dc9e4912
GS
3318 }
3319 return result;
3320}
3321
767df6a1 3322I32
864dbfa3 3323Perl_my_fflush_all(pTHX)
767df6a1 3324{
8fbdfb7c 3325#if defined(FFLUSH_NULL)
ce720889 3326 return PerlIO_flush(NULL);
767df6a1 3327#else
8fbdfb7c 3328# if defined(HAS__FWALK)
74cac757
JH
3329 /* undocumented, unprototyped, but very useful BSDism */
3330 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3331 _fwalk(&fflush);
74cac757 3332 return 0;
8fa7f367 3333# else
8fbdfb7c 3334# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
8fa7f367 3335 long open_max = -1;
8fbdfb7c 3336# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3337 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c 3338# else
8fa7f367 3339# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3340 open_max = sysconf(_SC_OPEN_MAX);
8fa7f367
JH
3341# else
3342# ifdef FOPEN_MAX
74cac757 3343 open_max = FOPEN_MAX;
8fa7f367
JH
3344# else
3345# ifdef OPEN_MAX
74cac757 3346 open_max = OPEN_MAX;
8fa7f367
JH
3347# else
3348# ifdef _NFILE
d2201af2 3349 open_max = _NFILE;
8fa7f367
JH
3350# endif
3351# endif
74cac757 3352# endif
767df6a1
JH
3353# endif
3354# endif
767df6a1
JH
3355 if (open_max > 0) {
3356 long i;
3357 for (i = 0; i < open_max; i++)
d2201af2
AD
3358 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3359 STDIO_STREAM_ARRAY[i]._file < open_max &&
3360 STDIO_STREAM_ARRAY[i]._flag)
3361 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH
3362 return 0;
3363 }
8fbdfb7c 3364# endif
767df6a1
JH
3365 SETERRNO(EBADF,RMS$_IFI);
3366 return EOF;
74cac757 3367# endif
767df6a1
JH
3368#endif
3369}
097ee67d 3370
69282e91 3371void
bc37a18f
RG
3372Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
3373{
9c0fcd4f 3374 char *vile;
4e34385f 3375 I32 warn_type;
bc37a18f 3376 char *func =
66fc2fa5
JH
3377 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3378 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f
RG
3379 PL_op_desc[op];
3380 char *pars = OP_IS_FILETEST(op) ? "" : "()";
21865922
JH
3381 char *type = OP_IS_SOCKET(op) ||
3382 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
2dd78f96 3383 "socket" : "filehandle";
9c0fcd4f 3384 char *name = NULL;
bc37a18f 3385
21865922 3386 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
9c0fcd4f 3387 vile = "closed";
4e34385f 3388 warn_type = WARN_CLOSED;
2dd78f96
JH
3389 }
3390 else {
9c0fcd4f 3391 vile = "unopened";
4e34385f 3392 warn_type = WARN_UNOPENED;
9c0fcd4f 3393 }
bc37a18f 3394
66fc2fa5
JH
3395 if (gv && isGV(gv)) {
3396 SV *sv = sv_newmortal();
3397 gv_efullname4(sv, gv, Nullch, FALSE);
3398 name = SvPVX(sv);
3399 }
3400
4c80c0b2
NC
3401 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3402 if (name && *name)
3403 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for %sput",
7889fe52 3404 name,
4c80c0b2
NC
3405 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
3406 else
3407 Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for %sput",
3408 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
3409 } else if (name && *name) {
4e34385f 3410 Perl_warner(aTHX_ warn_type,
9c0fcd4f 3411 "%s%s on %s %s %s", func, pars, vile, type, name);
3e11456d 3412 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 3413 Perl_warner(aTHX_ warn_type,
bc37a18f
RG
3414 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3415 func, pars, name);
2dd78f96
JH
3416 }
3417 else {
4e34385f 3418 Perl_warner(aTHX_ warn_type,
9c0fcd4f 3419 "%s%s on %s %s", func, pars, vile, type);
21865922 3420 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 3421 Perl_warner(aTHX_ warn_type,
bc37a18f
RG
3422 "\t(Are you trying to call %s%s on dirhandle?)\n",
3423 func, pars);
3424 }
69282e91 3425}
a926ef6b
JH
3426
3427#ifdef EBCDIC
cbebf344
JH
3428/* in ASCII order, not that it matters */
3429static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3430
a926ef6b
JH
3431int
3432Perl_ebcdic_control(pTHX_ int ch)
3433{
3434 if (ch > 'a') {
3435 char *ctlp;
4a7d1889 3436
a926ef6b
JH
3437 if (islower(ch))
3438 ch = toupper(ch);
4a7d1889 3439
a926ef6b
JH
3440 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3441 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3442 }
4a7d1889 3443
a926ef6b
JH
3444 if (ctlp == controllablechars)
3445 return('\177'); /* DEL */
3446 else
3447 return((unsigned char)(ctlp - controllablechars - 1));
3448 } else { /* Want uncontrol */
3449 if (ch == '\177' || ch == -1)
3450 return('?');
3451 else if (ch == '\157')
3452 return('\177');
3453 else if (ch == '\174')
3454 return('\000');
3455 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3456 return('\036');
3457 else if (ch == '\155')
3458 return('\037');
3459 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3460 return(controllablechars[ch+1]);
3461 else
3462 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3463 }
3464}
3465#endif
e72cf795 3466
e72cf795
JH
3467/* XXX struct tm on some systems (SunOS4/BSD) contains extra (non POSIX)
3468 * fields for which we don't have Configure support yet:
3469 * char *tm_zone; -- abbreviation of timezone name
3470 * long tm_gmtoff; -- offset from GMT in seconds
3471 * To workaround core dumps from the uninitialised tm_zone we get the
3472 * system to give us a reasonable struct to copy. This fix means that
3473 * strftime uses the tm_zone and tm_gmtoff values returned by
3474 * localtime(time()). That should give the desired result most of the
3475 * time. But probably not always!
3476 *
3477 * This is a temporary workaround to be removed once Configure
3478 * support is added and NETaa14816 is considered in full.
3479 * It does not address tzname aspects of NETaa14816.
3480 */
3481#ifdef HAS_GNULIBC
3482# ifndef STRUCT_TM_HASZONE
3483# define STRUCT_TM_HASZONE
3484# endif
3485#endif
3486
3487void
f1208910 3488Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795
JH
3489{
3490#ifdef STRUCT_TM_HASZONE
3491 Time_t now;
3492 (void)time(&now);
3493 Copy(localtime(&now), ptm, 1, struct tm);
3494#endif
3495}
3496
3497/*
3498 * mini_mktime - normalise struct tm values without the localtime()
3499 * semantics (and overhead) of mktime().
3500 */
3501void
f1208910 3502Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH
3503{
3504 int yearday;
3505 int secs;
3506 int month, mday, year, jday;
3507 int odd_cent, odd_year;
3508
3509#define DAYS_PER_YEAR 365
3510#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3511#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3512#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3513#define SECS_PER_HOUR (60*60)
3514#define SECS_PER_DAY (24*SECS_PER_HOUR)
3515/* parentheses deliberately absent on these two, otherwise they don't work */
3516#define MONTH_TO_DAYS 153/5
3517#define DAYS_TO_MONTH 5/153
3518/* offset to bias by March (month 4) 1st between month/mday & year finding */
3519#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3520/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3521#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3522
3523/*
3524 * Year/day algorithm notes:
3525 *
3526 * With a suitable offset for numeric value of the month, one can find
3527 * an offset into the year by considering months to have 30.6 (153/5) days,
3528 * using integer arithmetic (i.e., with truncation). To avoid too much
3529 * messing about with leap days, we consider January and February to be
3530 * the 13th and 14th month of the previous year. After that transformation,
3531 * we need the month index we use to be high by 1 from 'normal human' usage,
3532 * so the month index values we use run from 4 through 15.
3533 *
3534 * Given that, and the rules for the Gregorian calendar (leap years are those
3535 * divisible by 4 unless also divisible by 100, when they must be divisible
3536 * by 400 instead), we can simply calculate the number of days since some
3537 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3538 * the days we derive from our month index, and adding in the day of the
3539 * month. The value used here is not adjusted for the actual origin which
3540 * it normally would use (1 January A.D. 1), since we're not exposing it.
3541 * We're only building the value so we can turn around and get the
3542 * normalised values for the year, month, day-of-month, and day-of-year.
3543 *
3544 * For going backward, we need to bias the value we're using so that we find
3545 * the right year value. (Basically, we don't want the contribution of
3546 * March 1st to the number to apply while deriving the year). Having done
3547 * that, we 'count up' the contribution to the year number by accounting for
3548 * full quadracenturies (400-year periods) with their extra leap days, plus
3549 * the contribution from full centuries (to avoid counting in the lost leap
3550 * days), plus the contribution from full quad-years (to count in the normal
3551 * leap days), plus the leftover contribution from any non-leap years.
3552 * At this point, if we were working with an actual leap day, we'll have 0
3553 * days left over. This is also true for March 1st, however. So, we have
3554 * to special-case that result, and (earlier) keep track of the 'odd'
3555 * century and year contributions. If we got 4 extra centuries in a qcent,
3556 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3557 * Otherwise, we add back in the earlier bias we removed (the 123 from
3558 * figuring in March 1st), find the month index (integer division by 30.6),
3559 * and the remainder is the day-of-month. We then have to convert back to
3560 * 'real' months (including fixing January and February from being 14/15 in
3561 * the previous year to being in the proper year). After that, to get
3562 * tm_yday, we work with the normalised year and get a new yearday value for
3563 * January 1st, which we subtract from the yearday value we had earlier,
3564 * representing the date we've re-built. This is done from January 1
3565 * because tm_yday is 0-origin.
3566 *
3567 * Since POSIX time routines are only guaranteed to work for times since the
3568 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3569 * applies Gregorian calendar rules even to dates before the 16th century
3570 * doesn't bother me. Besides, you'd need cultural context for a given
3571 * date to know whether it was Julian or Gregorian calendar, and that's
3572 * outside the scope for this routine. Since we convert back based on the
3573 * same rules we used to build the yearday, you'll only get strange results
3574 * for input which needed normalising, or for the 'odd' century years which
3575 * were leap years in the Julian calander but not in the Gregorian one.
3576 * I can live with that.
3577 *
3578 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3579 * that's still outside the scope for POSIX time manipulation, so I don't
3580 * care.
3581 */
3582
3583 year = 1900 + ptm->tm_year;
3584 month = ptm->tm_mon;
3585 mday = ptm->tm_mday;
3586 /* allow given yday with no month & mday to dominate the result */
3587 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3588 month = 0;
3589 mday = 0;
3590 jday = 1 + ptm->tm_yday;
3591 }
3592 else {
3593 jday = 0;
3594 }
3595 if (month >= 2)
3596 month+=2;
3597 else
3598 month+=14, year--;
3599 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3600 yearday += month*MONTH_TO_DAYS + mday + jday;
3601 /*
3602 * Note that we don't know when leap-seconds were or will be,
3603 * so we have to trust the user if we get something which looks
3604 * like a sensible leap-second. Wild values for seconds will
3605 * be rationalised, however.
3606 */
3607 if ((unsigned) ptm->tm_sec <= 60) {
3608 secs = 0;
3609 }
3610 else {
3611 secs = ptm->tm_sec;
3612 ptm->tm_sec = 0;
3613 }
3614 secs += 60 * ptm->tm_min;
3615 secs += SECS_PER_HOUR * ptm->tm_hour;
3616 if (secs < 0) {
3617 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3618 /* got negative remainder, but need positive time */
3619 /* back off an extra day to compensate */
3620 yearday += (secs/SECS_PER_DAY)-1;
3621 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3622 }
3623 else {
3624 yearday += (secs/SECS_PER_DAY);
3625 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3626 }
3627 }
3628 else if (secs >= SECS_PER_DAY) {
3629 yearday += (secs/SECS_PER_DAY);
3630 secs %= SECS_PER_DAY;
3631 }
3632 ptm->tm_hour = secs/SECS_PER_HOUR;
3633 secs %= SECS_PER_HOUR;
3634 ptm->tm_min = secs/60;
3635 secs %= 60;
3636 ptm->tm_sec += secs;
3637 /* done with time of day effects */
3638 /*
3639 * The algorithm for yearday has (so far) left it high by 428.
3640 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3641 * bias it by 123 while trying to figure out what year it
3642 * really represents. Even with this tweak, the reverse
3643 * translation fails for years before A.D. 0001.
3644 * It would still fail for Feb 29, but we catch that one below.
3645 */
3646 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3647 yearday -= YEAR_ADJUST;
3648 year = (yearday / DAYS_PER_QCENT) * 400;
3649 yearday %= DAYS_PER_QCENT;
3650 odd_cent = yearday / DAYS_PER_CENT;
3651 year += odd_cent * 100;
3652 yearday %= DAYS_PER_CENT;
3653 year += (yearday / DAYS_PER_QYEAR) * 4;
3654 yearday %= DAYS_PER_QYEAR;
3655 odd_year = yearday / DAYS_PER_YEAR;
3656 year += odd_year;
3657 yearday %= DAYS_PER_YEAR;
3658 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */