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Drop the -ansi from the default gcc flags.
[perl5.git] / util.c
CommitLineData
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 24#ifndef SIG_ERR
25# define SIG_ERR ((Sighandler_t) -1)
26#endif
64ca3a65 27#endif
36477c24 28
a687059c
LW		 29#ifdef I_VFORK
30# include <vfork.h>
31#endif
32
94b6baf5
AD		 33/* Put this after #includes because fork and vfork prototypes may
34 conflict.
35*/
36#ifndef HAS_VFORK
37# define vfork fork
38#endif
39
ff68c719 40#ifdef I_SYS_WAIT
41# include <sys/wait.h>
42#endif
43
097ee67d
JH		 44#ifdef I_LOCALE
45# include <locale.h>
46#endif
47
8d063cd8 48#define FLUSH
8d063cd8 49
a0d0e21e 50#ifdef LEAKTEST
a0d0e21e 51
8c52afec
IZ		 52long xcount[MAXXCOUNT];
53long lastxcount[MAXXCOUNT];
54long xycount[MAXXCOUNT][MAXYCOUNT];
55long lastxycount[MAXXCOUNT][MAXYCOUNT];
56
a0d0e21e 57#endif
a863c7d1 58
16cebae2
GS		 59#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
60# define FD_CLOEXEC 1 /* NeXT needs this */
61#endif
62
f2517201 63/* paranoid version of system's malloc() */
8d063cd8 64
a687059c
LW		 65/* NOTE: Do not call the next three routines directly. Use the macros
66 * in handy.h, so that we can easily redefine everything to do tracking of
67 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 68 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW		 69 */
70
bd4080b3 71Malloc_t
4f63d024 72Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 73{
54aff467 74 dTHX;
bd4080b3 75 Malloc_t ptr;
55497cff 76#ifdef HAS_64K_LIMIT
62b28dd9 77 if (size > 0xffff) {
bf49b057 78 PerlIO_printf(Perl_error_log,
16cebae2 79 "Allocation too large: %lx\n", size) FLUSH;
54aff467 80 my_exit(1);
62b28dd9 81 }
55497cff 82#endif /* HAS_64K_LIMIT */
34de22dd
LW		 83#ifdef DEBUGGING
84 if ((long)size < 0)
4f63d024 85 Perl_croak_nocontext("panic: malloc");
34de22dd 86#endif
12ae5dfc 87 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 88 PERL_ALLOC_CHECK(ptr);
97835f67 89 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
8d063cd8
LW		 90 if (ptr != Nullch)
91 return ptr;
3280af22 92 else if (PL_nomemok)
7c0587c8 93 return Nullch;
8d063cd8 94 else {
bf49b057 95 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 96 my_exit(1);
4e35701f 97 return Nullch;
8d063cd8
LW		 98 }
99 /*NOTREACHED*/
100}
101
f2517201 102/* paranoid version of system's realloc() */
8d063cd8 103
bd4080b3 104Malloc_t
4f63d024 105Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 106{
54aff467 107 dTHX;
bd4080b3 108 Malloc_t ptr;
9a34ef1d 109#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 110 Malloc_t PerlMem_realloc();
ecfc5424 111#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 112
a1d180c4 113#ifdef HAS_64K_LIMIT
5f05dabc 114 if (size > 0xffff) {
bf49b057 115 PerlIO_printf(Perl_error_log,
5f05dabc 116 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 117 my_exit(1);
5f05dabc 118 }
55497cff 119#endif /* HAS_64K_LIMIT */
7614df0c 120 if (!size) {
f2517201 121 safesysfree(where);
7614df0c
JD		 122 return NULL;
123 }
124
378cc40b 125 if (!where)
f2517201 126 return safesysmalloc(size);
34de22dd
LW		 127#ifdef DEBUGGING
128 if ((long)size < 0)
4f63d024 129 Perl_croak_nocontext("panic: realloc");
34de22dd 130#endif
12ae5dfc 131 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 132 PERL_ALLOC_CHECK(ptr);
a1d180c4 133
97835f67
JH		 134 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
135 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
79072805 136
8d063cd8
LW		 137 if (ptr != Nullch)
138 return ptr;
3280af22 139 else if (PL_nomemok)
7c0587c8 140 return Nullch;
8d063cd8 141 else {
bf49b057 142 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 143 my_exit(1);
4e35701f 144 return Nullch;
8d063cd8
LW		 145 }
146 /*NOTREACHED*/
147}
148
f2517201 149/* safe version of system's free() */
8d063cd8 150
54310121 151Free_t
4f63d024 152Perl_safesysfree(Malloc_t where)
8d063cd8 153{
155aba94 154#ifdef PERL_IMPLICIT_SYS
54aff467 155 dTHX;
155aba94 156#endif
97835f67 157 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 158 if (where) {
de3bb511 159 /*SUPPRESS 701*/
6ad3d225 160 PerlMem_free(where);
378cc40b 161 }
8d063cd8
LW		 162}
163
f2517201 164/* safe version of system's calloc() */
1050c9ca 165
bd4080b3 166Malloc_t
4f63d024 167Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 168{
54aff467 169 dTHX;
bd4080b3 170 Malloc_t ptr;
1050c9ca 171
55497cff 172#ifdef HAS_64K_LIMIT
5f05dabc 173 if (size * count > 0xffff) {
bf49b057 174 PerlIO_printf(Perl_error_log,
5f05dabc 175 "Allocation too large: %lx\n", size * count) FLUSH;
54aff467 176 my_exit(1);
5f05dabc 177 }
55497cff 178#endif /* HAS_64K_LIMIT */
1050c9ca 179#ifdef DEBUGGING
180 if ((long)size < 0 || (long)count < 0)
4f63d024 181 Perl_croak_nocontext("panic: calloc");
1050c9ca 182#endif
0b7c1c42 183 size *= count;
12ae5dfc 184 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 185 PERL_ALLOC_CHECK(ptr);
97835f67 186 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 187 if (ptr != Nullch) {
188 memset((void*)ptr, 0, size);
189 return ptr;
190 }
3280af22 191 else if (PL_nomemok)
1050c9ca 192 return Nullch;
193 else {
bf49b057 194 PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
54aff467 195 my_exit(1);
4e35701f 196 return Nullch;
1050c9ca 197 }
198 /*NOTREACHED*/
199}
200
a687059c
LW		 201#ifdef LEAKTEST
202
8c52afec
IZ		 203struct mem_test_strut {
204 union {
205 long type;
206 char c[2];
207 } u;
208 long size;
209};
210
211# define ALIGN sizeof(struct mem_test_strut)
212
213# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
214# define typeof_chunk(ch) \
215 (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
216# define set_typeof_chunk(ch,t) \
217 (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
218#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
219 ? MAXYCOUNT - 1 \
220 : ( (size) > 40 \
221 ? ((size) - 1)/8 + 5 \
222 : ((size) - 1)/4))
8d063cd8 223
bd4080b3 224Malloc_t
4f63d024 225Perl_safexmalloc(I32 x, MEM_SIZE size)
8d063cd8 226{
8c52afec 227 register char* where = (char*)safemalloc(size + ALIGN);
8d063cd8 228
8c52afec
IZ		 229 xcount[x] += size;
230 xycount[x][SIZE_TO_Y(size)]++;
231 set_typeof_chunk(where, x);
232 sizeof_chunk(where) = size;
233 return (Malloc_t)(where + ALIGN);
8d063cd8 234}
8d063cd8 235
bd4080b3 236Malloc_t
4f63d024 237Perl_safexrealloc(Malloc_t wh, MEM_SIZE size)
a687059c 238{
8c52afec
IZ		 239 char *where = (char*)wh;
240
241 if (!wh)
242 return safexmalloc(0,size);
a1d180c4 243
8c52afec
IZ		 244 {
245 MEM_SIZE old = sizeof_chunk(where - ALIGN);
246 int t = typeof_chunk(where - ALIGN);
247 register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
a1d180c4 248
8c52afec
IZ		 249 xycount[t][SIZE_TO_Y(old)]--;
250 xycount[t][SIZE_TO_Y(size)]++;
251 xcount[t] += size - old;
252 sizeof_chunk(new) = size;
253 return (Malloc_t)(new + ALIGN);
254 }
a687059c
LW		 255}
256
257void
4f63d024 258Perl_safexfree(Malloc_t wh)
a687059c 259{
79072805 260 I32 x;
8c52afec
IZ		 261 char *where = (char*)wh;
262 MEM_SIZE size;
a1d180c4 263
a687059c
LW		 264 if (!where)
265 return;
266 where -= ALIGN;
8c52afec 267 size = sizeof_chunk(where);
a687059c 268 x = where[0] + 100 * where[1];
8c52afec
IZ		 269 xcount[x] -= size;
270 xycount[x][SIZE_TO_Y(size)]--;
a687059c
LW		 271 safefree(where);
272}
273
bd4080b3 274Malloc_t
4f63d024 275Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
1050c9ca 276{
8c52afec
IZ		 277 register char * where = (char*)safexmalloc(x, size * count + ALIGN);
278 xcount[x] += size;
279 xycount[x][SIZE_TO_Y(size)]++;
280 memset((void*)(where + ALIGN), 0, size * count);
281 set_typeof_chunk(where, x);
282 sizeof_chunk(where) = size;
283 return (Malloc_t)(where + ALIGN);
1050c9ca 284}
285
864dbfa3 286STATIC void
cea2e8a9 287S_xstat(pTHX_ int flag)
8d063cd8 288{
8c52afec
IZ		 289 register I32 i, j, total = 0;
290 I32 subtot[MAXYCOUNT];
8d063cd8 291
8c52afec
IZ		 292 for (j = 0; j < MAXYCOUNT; j++) {
293 subtot[j] = 0;
294 }
a1d180c4 295
bf49b057 296 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 297 for (i = 0; i < MAXXCOUNT; i++) {
8c52afec
IZ		 298 total += xcount[i];
299 for (j = 0; j < MAXYCOUNT; j++) {
300 subtot[j] += xycount[i][j];
301 }
302 if (flag == 0
303 ? xcount[i] /* Have something */
a1d180c4 304 : (flag == 2
8c52afec
IZ		 305 ? xcount[i] != lastxcount[i] /* Changed */
306 : xcount[i] > lastxcount[i])) { /* Growed */
a1d180c4 307 PerlIO_printf(Perl_debug_log,"%2d %02d %7ld ", i / 100, i % 100,
8c52afec 308 flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
a687059c 309 lastxcount[i] = xcount[i];
8c52afec 310 for (j = 0; j < MAXYCOUNT; j++) {
a1d180c4 311 if ( flag == 0
8c52afec 312 ? xycount[i][j] /* Have something */
a1d180c4 313 : (flag == 2
8c52afec
IZ		 314 ? xycount[i][j] != lastxycount[i][j] /* Changed */
315 : xycount[i][j] > lastxycount[i][j])) { /* Growed */
a1d180c4
NIS		 316 PerlIO_printf(Perl_debug_log,"%3ld ",
317 flag == 2
318 ? xycount[i][j] - lastxycount[i][j]
8c52afec
IZ		 319 : xycount[i][j]);
320 lastxycount[i][j] = xycount[i][j];
321 } else {
bf49b057 322 PerlIO_printf(Perl_debug_log, " . ", xycount[i][j]);
8c52afec
IZ		 323 }
324 }
bf49b057 325 PerlIO_printf(Perl_debug_log, "\n");
8c52afec
IZ		 326 }
327 }
328 if (flag != 2) {
bf49b057 329 PerlIO_printf(Perl_debug_log, "Total %7ld ", total);
8c52afec
IZ		 330 for (j = 0; j < MAXYCOUNT; j++) {
331 if (subtot[j]) {
bf49b057 332 PerlIO_printf(Perl_debug_log, "%3ld ", subtot[j]);
8c52afec 333 } else {
bf49b057 334 PerlIO_printf(Perl_debug_log, " . ");
8c52afec 335 }
8d063cd8 336 }
bf49b057 337 PerlIO_printf(Perl_debug_log, "\n");
8d063cd8 338 }
8d063cd8 339}
a687059c
LW		 340
341#endif /* LEAKTEST */
8d063cd8
LW		 342
343/* copy a string up to some (non-backslashed) delimiter, if any */
344
345char *
864dbfa3 346Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
8d063cd8 347{
fc36a67e 348 register I32 tolen;
349 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b
LW		 350 if (*from == '\\') {
351 if (from[1] == delim)
352 from++;
fc36a67e 353 else {
354 if (to < toend)
355 *to++ = *from;
356 tolen++;
357 from++;
358 }
378cc40b 359 }
bedebaa5 360 else if (*from == delim)
8d063cd8 361 break;
fc36a67e 362 if (to < toend)
363 *to++ = *from;
8d063cd8 364 }
bedebaa5
CS		 365 if (to < toend)
366 *to = '\0';
fc36a67e 367 *retlen = tolen;
8d063cd8
LW		 368 return from;
369}
370
371/* return ptr to little string in big string, NULL if not found */
378cc40b 372/* This routine was donated by Corey Satten. */
8d063cd8
LW		 373
374char *
864dbfa3 375Perl_instr(pTHX_ register const char *big, register const char *little)
378cc40b 376{
08105a92 377 register const char *s, *x;
79072805 378 register I32 first;
378cc40b 379
a687059c 380 if (!little)
08105a92 381 return (char*)big;
a687059c 382 first = *little++;
378cc40b 383 if (!first)
08105a92 384 return (char*)big;
378cc40b
LW		 385 while (*big) {
386 if (*big++ != first)
387 continue;
388 for (x=big,s=little; *s; /**/ ) {
389 if (!*x)
390 return Nullch;
391 if (*s++ != *x++) {
392 s--;
393 break;
394 }
395 }
396 if (!*s)
08105a92 397 return (char*)(big-1);
378cc40b
LW		 398 }
399 return Nullch;
400}
8d063cd8 401
a687059c
LW		 402/* same as instr but allow embedded nulls */
403
404char *
864dbfa3 405Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
8d063cd8 406{
08105a92 407 register const char *s, *x;
79072805 408 register I32 first = *little;
08105a92 409 register const char *littleend = lend;
378cc40b 410
a0d0e21e 411 if (!first && little >= littleend)
08105a92 412 return (char*)big;
de3bb511
LW		 413 if (bigend - big < littleend - little)
414 return Nullch;
a687059c
LW		 415 bigend -= littleend - little++;
416 while (big <= bigend) {
417 if (*big++ != first)
418 continue;
419 for (x=big,s=little; s < littleend; /**/ ) {
420 if (*s++ != *x++) {
421 s--;
422 break;
423 }
424 }
425 if (s >= littleend)
08105a92 426 return (char*)(big-1);
378cc40b 427 }
a687059c
LW		 428 return Nullch;
429}
430
431/* reverse of the above--find last substring */
432
433char *
864dbfa3 434Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
a687059c 435{
08105a92
GS		 436 register const char *bigbeg;
437 register const char *s, *x;
79072805 438 register I32 first = *little;
08105a92 439 register const char *littleend = lend;
a687059c 440
a0d0e21e 441 if (!first && little >= littleend)
08105a92 442 return (char*)bigend;
a687059c
LW		 443 bigbeg = big;
444 big = bigend - (littleend - little++);
445 while (big >= bigbeg) {
446 if (*big-- != first)
447 continue;
448 for (x=big+2,s=little; s < littleend; /**/ ) {
449 if (*s++ != *x++) {
450 s--;
451 break;
452 }
453 }
454 if (s >= littleend)
08105a92 455 return (char*)(big+1);
378cc40b 456 }
a687059c 457 return Nullch;
378cc40b 458}
a687059c 459
bbce6d69 460/*
461 * Set up for a new ctype locale.
462 */
55497cff 463void
ff4fed7c 464Perl_new_ctype(pTHX_ char *newctype)
ef7eada9 465{
36477c24 466#ifdef USE_LOCALE_CTYPE
467
bbce6d69 468 int i;
ef7eada9 469
bbce6d69 470 for (i = 0; i < 256; i++) {
471 if (isUPPER_LC(i))
22c35a8c 472 PL_fold_locale[i] = toLOWER_LC(i);
bbce6d69 473 else if (isLOWER_LC(i))
22c35a8c 474 PL_fold_locale[i] = toUPPER_LC(i);
bbce6d69 475 else
22c35a8c 476 PL_fold_locale[i] = i;
bbce6d69 477 }
bbce6d69 478
36477c24 479#endif /* USE_LOCALE_CTYPE */
480}
bbce6d69 481
482/*
ff4fed7c
VK		 483 * Standardize the locale name from a string returned by 'setlocale'.
484 *
485 * The standard return value of setlocale() is either
486 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
487 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
488 * (the space-separated values represent the various sublocales,
489 * in some unspecificed order)
490 *
491 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
492 * which is harmful for further use of the string in setlocale().
493 *
494 */
495STATIC char *
496S_stdize_locale(pTHX_ char *locs)
497{
498 char *s;
499 bool okay = TRUE;
500
501 if ((s = strchr(locs, '='))) {
502 char *t;
503
504 okay = FALSE;
505 if ((t = strchr(s, '.'))) {
506 char *u;
507
508 if ((u = strchr(t, '\n'))) {
509
510 if (u[1] == 0) {
511 STRLEN len = u - s;
a528dad0 512 Move(s + 1, locs, len, char);
ff4fed7c
VK		 513 locs[len] = 0;
514 okay = TRUE;
515 }
516 }
517 }
518 }
519
520 if (!okay)
521 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
522
523 return locs;
524}
525
526/*
bbce6d69 527 * Set up for a new collation locale.
528 */
529void
ff4fed7c 530Perl_new_collate(pTHX_ char *newcoll)
bbce6d69 531{
36477c24 532#ifdef USE_LOCALE_COLLATE
533
bbce6d69 534 if (! newcoll) {
3280af22 535 if (PL_collation_name) {
9b3a60d0 536 ++PL_collation_ix;
3280af22
NIS		 537 Safefree(PL_collation_name);
538 PL_collation_name = NULL;
bbce6d69 539 }
ff4fed7c
VK		 540 PL_collation_standard = TRUE;
541 PL_collxfrm_base = 0;
542 PL_collxfrm_mult = 2;
bbce6d69 543 return;
544 }
545
3280af22 546 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
9b3a60d0
JH		 547 ++PL_collation_ix;
548 Safefree(PL_collation_name);
549 PL_collation_name = stdize_locale(savepv(newcoll));
3280af22 550 PL_collation_standard = (strEQ(newcoll, "C") || strEQ(newcoll, "POSIX"));
bbce6d69 551
bbce6d69 552 {
553 /* 2: at most so many chars ('a', 'b'). */
554 /* 50: surely no system expands a char more. */
555#define XFRMBUFSIZE (2 * 50)
556 char xbuf[XFRMBUFSIZE];
557 Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
558 Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
559 SSize_t mult = fb - fa;
560 if (mult < 1)
cea2e8a9 561 Perl_croak(aTHX_ "strxfrm() gets absurd");
3280af22
NIS		 562 PL_collxfrm_base = (fa > mult) ? (fa - mult) : 0;
563 PL_collxfrm_mult = mult;
bbce6d69 564 }
bbce6d69 565 }
bbce6d69 566
36477c24 567#endif /* USE_LOCALE_COLLATE */
568}
bbce6d69 569
097ee67d 570void
51371543 571Perl_set_numeric_radix(pTHX)
097ee67d
JH		 572{
573#ifdef USE_LOCALE_NUMERIC
574# ifdef HAS_LOCALECONV
575 struct lconv* lc;
576
577 lc = localeconv();
eff180cd
JH		 578 if (lc && lc->decimal_point) {
579 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
a453c169
JH		 580 SvREFCNT_dec(PL_numeric_radix_sv);
581 PL_numeric_radix_sv = Nullsv;
eff180cd
JH		 582 }
583 else {
a453c169
JH		 584 if (PL_numeric_radix_sv)
585 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
eff180cd 586 else
a453c169 587 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
eff180cd
JH		 588 }
589 }
097ee67d 590 else
a453c169 591 PL_numeric_radix_sv = Nullsv;
097ee67d 592# endif /* HAS_LOCALECONV */
097ee67d
JH		 593#endif /* USE_LOCALE_NUMERIC */
594}
595
bbce6d69 596/*
597 * Set up for a new numeric locale.
598 */
599void
ff4fed7c 600Perl_new_numeric(pTHX_ char *newnum)
bbce6d69 601{
36477c24 602#ifdef USE_LOCALE_NUMERIC
603
bbce6d69 604 if (! newnum) {
3280af22
NIS		 605 if (PL_numeric_name) {
606 Safefree(PL_numeric_name);
607 PL_numeric_name = NULL;
bbce6d69 608 }
ff4fed7c
VK		 609 PL_numeric_standard = TRUE;
610 PL_numeric_local = TRUE;
bbce6d69 611 return;
612 }
613
3280af22 614 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
9b3a60d0
JH		 615 Safefree(PL_numeric_name);
616 PL_numeric_name = stdize_locale(savepv(newnum));
3280af22
NIS		 617 PL_numeric_standard = (strEQ(newnum, "C") || strEQ(newnum, "POSIX"));
618 PL_numeric_local = TRUE;
51371543 619 set_numeric_radix();
bbce6d69 620 }
36477c24 621
622#endif /* USE_LOCALE_NUMERIC */
bbce6d69 623}
624
625void
864dbfa3 626Perl_set_numeric_standard(pTHX)
bbce6d69 627{
5f05dabc 628#ifdef USE_LOCALE_NUMERIC
629
3280af22 630 if (! PL_numeric_standard) {
bbce6d69 631 setlocale(LC_NUMERIC, "C");
3280af22
NIS		 632 PL_numeric_standard = TRUE;
633 PL_numeric_local = FALSE;
ff4fed7c 634 set_numeric_radix();
bbce6d69 635 }
5f05dabc 636
637#endif /* USE_LOCALE_NUMERIC */
bbce6d69 638}
639
640void
864dbfa3 641Perl_set_numeric_local(pTHX)
bbce6d69 642{
5f05dabc 643#ifdef USE_LOCALE_NUMERIC
644
3280af22
NIS		 645 if (! PL_numeric_local) {
646 setlocale(LC_NUMERIC, PL_numeric_name);
647 PL_numeric_standard = FALSE;
648 PL_numeric_local = TRUE;
51371543 649 set_numeric_radix();
bbce6d69 650 }
bbce6d69 651
36477c24 652#endif /* USE_LOCALE_NUMERIC */
5f05dabc 653}
36477c24 654
36477c24 655/*
656 * Initialize locale awareness.
657 */
f0c5b223 658int
864dbfa3 659Perl_init_i18nl10n(pTHX_ int printwarn)
f0c5b223
TB		 660{
661 int ok = 1;
662 /* returns
663 * 1 = set ok or not applicable,
664 * 0 = fallback to C locale,
665 * -1 = fallback to C locale failed
666 */
bbce6d69 667
b1281dbe 668#if defined(USE_LOCALE)
bbce6d69 669
36477c24 670#ifdef USE_LOCALE_CTYPE
bbce6d69 671 char *curctype = NULL;
36477c24 672#endif /* USE_LOCALE_CTYPE */
673#ifdef USE_LOCALE_COLLATE
bbce6d69 674 char *curcoll = NULL;
36477c24 675#endif /* USE_LOCALE_COLLATE */
676#ifdef USE_LOCALE_NUMERIC
bbce6d69 677 char *curnum = NULL;
36477c24 678#endif /* USE_LOCALE_NUMERIC */
3aeabbed
JH		 679#ifdef __GLIBC__
680 char *language = PerlEnv_getenv("LANGUAGE");
681#endif
76e3520e
GS		 682 char *lc_all = PerlEnv_getenv("LC_ALL");
683 char *lang = PerlEnv_getenv("LANG");
bbce6d69 684 bool setlocale_failure = FALSE;
f0c5b223 685
02b32252
CS		 686#ifdef LOCALE_ENVIRON_REQUIRED
687
688 /*
689 * Ultrix setlocale(..., "") fails if there are no environment
690 * variables from which to get a locale name.
691 */
692
693 bool done = FALSE;
694
695#ifdef LC_ALL
696 if (lang) {
697 if (setlocale(LC_ALL, ""))
698 done = TRUE;
699 else
700 setlocale_failure = TRUE;
701 }
0644c9cb 702 if (!setlocale_failure) {
02b32252 703#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 704 if (! (curctype =
705 setlocale(LC_CTYPE,
706 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
02b32252
CS		 707 ? "" : Nullch)))
708 setlocale_failure = TRUE;
f4182098
AB		 709 else
710 curctype = savepv(curctype);
02b32252
CS		 711#endif /* USE_LOCALE_CTYPE */
712#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 713 if (! (curcoll =
714 setlocale(LC_COLLATE,
715 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
02b32252
CS		 716 ? "" : Nullch)))
717 setlocale_failure = TRUE;
f4182098
AB		 718 else
719 curcoll = savepv(curcoll);
02b32252
CS		 720#endif /* USE_LOCALE_COLLATE */
721#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 722 if (! (curnum =
723 setlocale(LC_NUMERIC,
724 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
02b32252
CS		 725 ? "" : Nullch)))
726 setlocale_failure = TRUE;
f4182098
AB		 727 else
728 curnum = savepv(curnum);
02b32252
CS		 729#endif /* USE_LOCALE_NUMERIC */
730 }
731
0644c9cb 732#endif /* LC_ALL */
02b32252 733
0644c9cb 734#endif /* !LOCALE_ENVIRON_REQUIRED */
5f05dabc 735
0644c9cb 736#ifdef LC_ALL
bbce6d69 737 if (! setlocale(LC_ALL, ""))
738 setlocale_failure = TRUE;
0644c9cb 739#endif /* LC_ALL */
bbce6d69 740
0644c9cb 741 if (!setlocale_failure) {
36477c24 742#ifdef USE_LOCALE_CTYPE
0644c9cb
IS		 743 if (! (curctype = setlocale(LC_CTYPE, "")))
744 setlocale_failure = TRUE;
f4182098
AB		 745 else
746 curctype = savepv(curctype);
36477c24 747#endif /* USE_LOCALE_CTYPE */
748#ifdef USE_LOCALE_COLLATE
0644c9cb
IS		 749 if (! (curcoll = setlocale(LC_COLLATE, "")))
750 setlocale_failure = TRUE;
f4182098
AB		 751 else
752 curcoll = savepv(curcoll);
36477c24 753#endif /* USE_LOCALE_COLLATE */
754#ifdef USE_LOCALE_NUMERIC
0644c9cb
IS		 755 if (! (curnum = setlocale(LC_NUMERIC, "")))
756 setlocale_failure = TRUE;
f4182098
AB		 757 else
758 curnum = savepv(curnum);
36477c24 759#endif /* USE_LOCALE_NUMERIC */
0644c9cb 760 }
02b32252 761
5f05dabc 762 if (setlocale_failure) {
763 char *p;
a1d180c4 764 bool locwarn = (printwarn > 1 ||
155aba94
GS		 765 (printwarn &&
766 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
20cec16a 767
5f05dabc 768 if (locwarn) {
769#ifdef LC_ALL
a1d180c4 770
bf49b057 771 PerlIO_printf(Perl_error_log,
5f05dabc 772 "perl: warning: Setting locale failed.\n");
773
774#else /* !LC_ALL */
a1d180c4 775
bf49b057 776 PerlIO_printf(Perl_error_log,
bbce6d69 777 "perl: warning: Setting locale failed for the categories:\n\t");
36477c24 778#ifdef USE_LOCALE_CTYPE
bbce6d69 779 if (! curctype)
bf49b057 780 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
36477c24 781#endif /* USE_LOCALE_CTYPE */
782#ifdef USE_LOCALE_COLLATE
bbce6d69 783 if (! curcoll)
bf49b057 784 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
36477c24 785#endif /* USE_LOCALE_COLLATE */
786#ifdef USE_LOCALE_NUMERIC
bbce6d69 787 if (! curnum)
bf49b057 788 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
36477c24 789#endif /* USE_LOCALE_NUMERIC */
bf49b057 790 PerlIO_printf(Perl_error_log, "\n");
bbce6d69 791
5f05dabc 792#endif /* LC_ALL */
793
bf49b057 794 PerlIO_printf(Perl_error_log,
bbce6d69 795 "perl: warning: Please check that your locale settings:\n");
ef7eada9 796
3aeabbed 797#ifdef __GLIBC__
bf49b057 798 PerlIO_printf(Perl_error_log,
3aeabbed
JH		 799 "\tLANGUAGE = %c%s%c,\n",
800 language ? '"' : '(',
801 language ? language : "unset",
802 language ? '"' : ')');
803#endif
804
bf49b057 805 PerlIO_printf(Perl_error_log,
bbce6d69 806 "\tLC_ALL = %c%s%c,\n",
807 lc_all ? '"' : '(',
808 lc_all ? lc_all : "unset",
809 lc_all ? '"' : ')');
5f05dabc 810
b1281dbe 811#if defined(USE_ENVIRON_ARRAY)
5f05dabc 812 {
813 char **e;
814 for (e = environ; *e; e++) {
815 if (strnEQ(*e, "LC_", 3)
816 && strnNE(*e, "LC_ALL=", 7)
817 && (p = strchr(*e, '=')))
bf49b057 818 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
fb73857a 819 (int)(p - *e), *e, p + 1);
5f05dabc 820 }
821 }
b1281dbe
JH		 822#else
823 PerlIO_printf(Perl_error_log,
824 "\t(possibly more locale environment variables)\n");
825#endif
5f05dabc 826
bf49b057 827 PerlIO_printf(Perl_error_log,
bbce6d69 828 "\tLANG = %c%s%c\n",
5f05dabc 829 lang ? '"' : '(',
bbce6d69 830 lang ? lang : "unset",
831 lang ? '"' : ')');
ef7eada9 832
bf49b057 833 PerlIO_printf(Perl_error_log,
bbce6d69 834 " are supported and installed on your system.\n");
5f05dabc 835 }
ef7eada9 836
5f05dabc 837#ifdef LC_ALL
838
839 if (setlocale(LC_ALL, "C")) {
840 if (locwarn)
bf49b057 841 PerlIO_printf(Perl_error_log,
5f05dabc 842 "perl: warning: Falling back to the standard locale (\"C\").\n");
bbce6d69 843 ok = 0;
ef7eada9 844 }
5f05dabc 845 else {
846 if (locwarn)
bf49b057 847 PerlIO_printf(Perl_error_log,
5f05dabc 848 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
849 ok = -1;
850 }
bbce6d69 851
5f05dabc 852#else /* ! LC_ALL */
853
854 if (0
36477c24 855#ifdef USE_LOCALE_CTYPE
5f05dabc 856 || !(curctype || setlocale(LC_CTYPE, "C"))
36477c24 857#endif /* USE_LOCALE_CTYPE */
858#ifdef USE_LOCALE_COLLATE
5f05dabc 859 || !(curcoll || setlocale(LC_COLLATE, "C"))
36477c24 860#endif /* USE_LOCALE_COLLATE */
861#ifdef USE_LOCALE_NUMERIC
5f05dabc 862 || !(curnum || setlocale(LC_NUMERIC, "C"))
36477c24 863#endif /* USE_LOCALE_NUMERIC */
5f05dabc 864 )
865 {
866 if (locwarn)
bf49b057 867 PerlIO_printf(Perl_error_log,
5f05dabc 868 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
869 ok = -1;
bbce6d69 870 }
5f05dabc 871
bbce6d69 872#endif /* ! LC_ALL */
5f05dabc 873
874#ifdef USE_LOCALE_CTYPE
f4182098 875 curctype = savepv(setlocale(LC_CTYPE, Nullch));
5f05dabc 876#endif /* USE_LOCALE_CTYPE */
877#ifdef USE_LOCALE_COLLATE
f4182098 878 curcoll = savepv(setlocale(LC_COLLATE, Nullch));
5f05dabc 879#endif /* USE_LOCALE_COLLATE */
880#ifdef USE_LOCALE_NUMERIC
f4182098 881 curnum = savepv(setlocale(LC_NUMERIC, Nullch));
5f05dabc 882#endif /* USE_LOCALE_NUMERIC */
ef7eada9 883 }
f4182098 884 else {
ef7eada9 885
36477c24 886#ifdef USE_LOCALE_CTYPE
864dbfa3 887 new_ctype(curctype);
36477c24 888#endif /* USE_LOCALE_CTYPE */
bbce6d69 889
36477c24 890#ifdef USE_LOCALE_COLLATE
864dbfa3 891 new_collate(curcoll);
36477c24 892#endif /* USE_LOCALE_COLLATE */
bbce6d69 893
36477c24 894#ifdef USE_LOCALE_NUMERIC
864dbfa3 895 new_numeric(curnum);
36477c24 896#endif /* USE_LOCALE_NUMERIC */
f4182098 897 }
ef7eada9 898
b1281dbe 899#endif /* USE_LOCALE */
ef7eada9 900
f4182098
AB		 901#ifdef USE_LOCALE_CTYPE
902 if (curctype != NULL)
903 Safefree(curctype);
904#endif /* USE_LOCALE_CTYPE */
905#ifdef USE_LOCALE_COLLATE
906 if (curcoll != NULL)
907 Safefree(curcoll);
908#endif /* USE_LOCALE_COLLATE */
909#ifdef USE_LOCALE_NUMERIC
910 if (curnum != NULL)
911 Safefree(curnum);
912#endif /* USE_LOCALE_NUMERIC */
f0c5b223
TB		 913 return ok;
914}
915
bbce6d69 916/* Backwards compatibility. */
917int
864dbfa3 918Perl_init_i18nl14n(pTHX_ int printwarn)
bbce6d69 919{
864dbfa3 920 return init_i18nl10n(printwarn);
bbce6d69 921}
ef7eada9 922
36477c24 923#ifdef USE_LOCALE_COLLATE
ef7eada9 924
bbce6d69 925/*
926 * mem_collxfrm() is a bit like strxfrm() but with two important
927 * differences. First, it handles embedded NULs. Second, it allocates
928 * a bit more memory than needed for the transformed data itself.
929 * The real transformed data begins at offset sizeof(collationix).
930 * Please see sv_collxfrm() to see how this is used.
931 */
932char *
864dbfa3 933Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
bbce6d69 934{
935 char *xbuf;
76e3520e 936 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
bbce6d69 937
938 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
939 /* the +1 is for the terminating NUL. */
940
3280af22 941 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
76e3520e 942 New(171, xbuf, xAlloc, char);
bbce6d69 943 if (! xbuf)
944 goto bad;
945
3280af22
NIS		 946 *(U32*)xbuf = PL_collation_ix;
947 xout = sizeof(PL_collation_ix);
bbce6d69 948 for (xin = 0; xin < len; ) {
949 SSize_t xused;
950
951 for (;;) {
76e3520e 952 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
bbce6d69 953 if (xused == -1)
954 goto bad;
76e3520e 955 if (xused < xAlloc - xout)
bbce6d69 956 break;
76e3520e
GS		 957 xAlloc = (2 * xAlloc) + 1;
958 Renew(xbuf, xAlloc, char);
bbce6d69 959 if (! xbuf)
960 goto bad;
961 }
ef7eada9 962
bbce6d69 963 xin += strlen(s + xin) + 1;
964 xout += xused;
965
966 /* Embedded NULs are understood but silently skipped
967 * because they make no sense in locale collation. */
968 }
ef7eada9 969
bbce6d69 970 xbuf[xout] = '\0';
3280af22 971 *xlen = xout - sizeof(PL_collation_ix);
bbce6d69 972 return xbuf;
973
974 bad:
975 Safefree(xbuf);
976 *xlen = 0;
977 return NULL;
ef7eada9
JH		 978}
979
36477c24 980#endif /* USE_LOCALE_COLLATE */
bbce6d69 981
cf93c79d
IZ		 982#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
983
984/* As a space optimization, we do not compile tables for strings of length
985 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
986 special-cased in fbm_instr().
987
988 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
989
954c1994
GS		 990/*
991=for apidoc fbm_compile
992
993Analyses the string in order to make fast searches on it using fbm_instr()
994-- the Boyer-Moore algorithm.
995
996=cut
997*/
998
378cc40b 999void
7506f9c3 1000Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 1001{
942e002e
GS		 1002 register U8 *s;
1003 register U8 *table;
79072805 1004 register U32 i;
0b71040e 1005 STRLEN len;
79072805
LW		 1006 I32 rarest = 0;
1007 U32 frequency = 256;
1008
cf93c79d
IZ		 1009 if (flags & FBMcf_TAIL)
1010 sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
942e002e 1011 s = (U8*)SvPV_force(sv, len);
07f14f54 1012 (void)SvUPGRADE(sv, SVt_PVBM);
cf93c79d
IZ		 1013 if (len == 0) /* TAIL might be on on a zero-length string. */
1014 return;
02128f11 1015 if (len > 2) {
7506f9c3 1016 U8 mlen;
cf93c79d
IZ		 1017 unsigned char *sb;
1018
7506f9c3 1019 if (len > 255)
cf93c79d 1020 mlen = 255;
7506f9c3
GS		 1021 else
1022 mlen = (U8)len;
1023 Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
cf93c79d 1024 table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
7506f9c3
GS		 1025 s = table - 1 - FBM_TABLE_OFFSET; /* last char */
1026 memset((void*)table, mlen, 256);
1027 table[-1] = (U8)flags;
02128f11 1028 i = 0;
7506f9c3 1029 sb = s - mlen + 1; /* first char (maybe) */
cf93c79d
IZ		 1030 while (s >= sb) {
1031 if (table[*s] == mlen)
7506f9c3 1032 table[*s] = (U8)i;
cf93c79d
IZ		 1033 s--, i++;
1034 }
378cc40b 1035 }
14befaf4 1036 sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
79072805 1037 SvVALID_on(sv);
378cc40b 1038
463ee0b2 1039 s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
bbce6d69 1040 for (i = 0; i < len; i++) {
22c35a8c 1041 if (PL_freq[s[i]] < frequency) {
bbce6d69 1042 rarest = i;
22c35a8c 1043 frequency = PL_freq[s[i]];
378cc40b
LW		 1044 }
1045 }
79072805
LW		 1046 BmRARE(sv) = s[rarest];
1047 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ		 1048 BmUSEFUL(sv) = 100; /* Initial value */
1049 if (flags & FBMcf_TAIL)
1050 SvTAIL_on(sv);
7506f9c3
GS		 1051 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
1052 BmRARE(sv),BmPREVIOUS(sv)));
378cc40b
LW		 1053}
1054
cf93c79d
IZ		 1055/* If SvTAIL(littlestr), it has a fake '\n' at end. */
1056/* If SvTAIL is actually due to \Z or \z, this gives false positives
1057 if multiline */
1058
954c1994
GS		 1059/*
1060=for apidoc fbm_instr
1061
1062Returns the location of the SV in the string delimited by C<str> and
1063C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
1064does not have to be fbm_compiled, but the search will not be as fast
1065then.
1066
1067=cut
1068*/
1069
378cc40b 1070char *
864dbfa3 1071Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 1072{
a687059c 1073 register unsigned char *s;
cf93c79d
IZ		 1074 STRLEN l;
1075 register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
1076 register STRLEN littlelen = l;
1077 register I32 multiline = flags & FBMrf_MULTILINE;
1078
1079 if (bigend - big < littlelen) {
a1d180c4 1080 if ( SvTAIL(littlestr)
cf93c79d 1081 && (bigend - big == littlelen - 1)
a1d180c4 1082 && (littlelen == 1
12ae5dfc
JH		 1083 || (*big == *little &&
1084 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d
IZ		 1085 return (char*)big;
1086 return Nullch;
1087 }
378cc40b 1088
cf93c79d 1089 if (littlelen <= 2) { /* Special-cased */
cf93c79d
IZ		 1090
1091 if (littlelen == 1) {
1092 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
1093 /* Know that bigend != big. */
1094 if (bigend[-1] == '\n')
1095 return (char *)(bigend - 1);
1096 return (char *) bigend;
1097 }
1098 s = big;
1099 while (s < bigend) {
1100 if (*s == *little)
1101 return (char *)s;
1102 s++;
1103 }
1104 if (SvTAIL(littlestr))
1105 return (char *) bigend;
1106 return Nullch;
1107 }
1108 if (!littlelen)
1109 return (char*)big; /* Cannot be SvTAIL! */
1110
1111 /* littlelen is 2 */
1112 if (SvTAIL(littlestr) && !multiline) {
1113 if (bigend[-1] == '\n' && bigend[-2] == *little)
1114 return (char*)bigend - 2;
1115 if (bigend[-1] == *little)
1116 return (char*)bigend - 1;
1117 return Nullch;
1118 }
1119 {
1120 /* This should be better than FBM if c1 == c2, and almost
1121 as good otherwise: maybe better since we do less indirection.
1122 And we save a lot of memory by caching no table. */
1123 register unsigned char c1 = little[0];
1124 register unsigned char c2 = little[1];
1125
1126 s = big + 1;
1127 bigend--;
1128 if (c1 != c2) {
1129 while (s <= bigend) {
1130 if (s[0] == c2) {
1131 if (s[-1] == c1)
1132 return (char*)s - 1;
1133 s += 2;
1134 continue;
3fe6f2dc 1135 }
cf93c79d
IZ		 1136 next_chars:
1137 if (s[0] == c1) {
1138 if (s == bigend)
1139 goto check_1char_anchor;
1140 if (s[1] == c2)
1141 return (char*)s;
1142 else {
1143 s++;
1144 goto next_chars;
1145 }
1146 }
1147 else
1148 s += 2;
1149 }
1150 goto check_1char_anchor;
1151 }
1152 /* Now c1 == c2 */
1153 while (s <= bigend) {
1154 if (s[0] == c1) {
1155 if (s[-1] == c1)
1156 return (char*)s - 1;
1157 if (s == bigend)
1158 goto check_1char_anchor;
1159 if (s[1] == c1)
1160 return (char*)s;
1161 s += 3;
02128f11 1162 }
c277df42 1163 else
cf93c79d 1164 s += 2;
c277df42 1165 }
c277df42 1166 }
cf93c79d
IZ		 1167 check_1char_anchor: /* One char and anchor! */
1168 if (SvTAIL(littlestr) && (*bigend == *little))
1169 return (char *)bigend; /* bigend is already decremented. */
1170 return Nullch;
d48672a2 1171 }
cf93c79d 1172 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 1173 s = bigend - littlelen;
a1d180c4 1174 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ		 1175 /* Automatically of length > 2 */
1176 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 1177 {
bbce6d69 1178 return (char*)s; /* how sweet it is */
7506f9c3
GS		 1179 }
1180 if (s[1] == *little
1181 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
1182 {
cf93c79d 1183 return (char*)s + 1; /* how sweet it is */
7506f9c3 1184 }
02128f11
IZ		 1185 return Nullch;
1186 }
cf93c79d
IZ		 1187 if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
1188 char *b = ninstr((char*)big,(char*)bigend,
1189 (char*)little, (char*)little + littlelen);
1190
1191 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
1192 /* Chop \n from littlestr: */
1193 s = bigend - littlelen + 1;
7506f9c3
GS		 1194 if (*s == *little
1195 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
1196 {
3fe6f2dc 1197 return (char*)s;
7506f9c3 1198 }
cf93c79d 1199 return Nullch;
a687059c 1200 }
cf93c79d 1201 return b;
a687059c 1202 }
a1d180c4 1203
cf93c79d
IZ		 1204 { /* Do actual FBM. */
1205 register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
1206 register unsigned char *oldlittle;
1207
1208 if (littlelen > bigend - big)
1209 return Nullch;
1210 --littlelen; /* Last char found by table lookup */
1211
1212 s = big + littlelen;
1213 little += littlelen; /* last char */
1214 oldlittle = little;
1215 if (s < bigend) {
1216 register I32 tmp;
1217
1218 top2:
1219 /*SUPPRESS 560*/
7506f9c3 1220 if ((tmp = table[*s])) {
62b28dd9 1221#ifdef POINTERRIGOR
cf93c79d
IZ		 1222 if (bigend - s > tmp) {
1223 s += tmp;
1224 goto top2;
1225 }
bbce6d69 1226 s += tmp;
62b28dd9 1227#else
cf93c79d 1228 if ((s += tmp) < bigend)
62b28dd9 1229 goto top2;
cf93c79d
IZ		 1230#endif
1231 goto check_end;
1232 }
1233 else { /* less expensive than calling strncmp() */
1234 register unsigned char *olds = s;
1235
1236 tmp = littlelen;
1237
1238 while (tmp--) {
1239 if (*--s == *--little)
1240 continue;
cf93c79d
IZ		 1241 s = olds + 1; /* here we pay the price for failure */
1242 little = oldlittle;
1243 if (s < bigend) /* fake up continue to outer loop */
1244 goto top2;
1245 goto check_end;
1246 }
1247 return (char *)s;
a687059c 1248 }
378cc40b 1249 }
cf93c79d
IZ		 1250 check_end:
1251 if ( s == bigend && (table[-1] & FBMcf_TAIL)
12ae5dfc
JH		 1252 && memEQ((char *)(bigend - littlelen),
1253 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d
IZ		 1254 return (char*)bigend - littlelen;
1255 return Nullch;
378cc40b 1256 }
378cc40b
LW		 1257}
1258
c277df42
IZ		 1259/* start_shift, end_shift are positive quantities which give offsets
1260 of ends of some substring of bigstr.
1261 If `last' we want the last occurence.
1262 old_posp is the way of communication between consequent calls if
a1d180c4 1263 the next call needs to find the .
c277df42 1264 The initial *old_posp should be -1.
cf93c79d
IZ		 1265
1266 Note that we take into account SvTAIL, so one can get extra
1267 optimizations if _ALL flag is set.
c277df42
IZ		 1268 */
1269
cf93c79d
IZ		 1270/* If SvTAIL is actually due to \Z or \z, this gives false positives
1271 if PL_multiline. In fact if !PL_multiline the autoritative answer
1272 is not supported yet. */
1273
378cc40b 1274char *
864dbfa3 1275Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 1276{
a687059c
LW		 1277 register unsigned char *s, *x;
1278 register unsigned char *big;
79072805
LW		 1279 register I32 pos;
1280 register I32 previous;
1281 register I32 first;
a687059c 1282 register unsigned char *little;
c277df42 1283 register I32 stop_pos;
a687059c 1284 register unsigned char *littleend;
c277df42 1285 I32 found = 0;
378cc40b 1286
c277df42 1287 if (*old_posp == -1
3280af22 1288 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
cf93c79d
IZ		 1289 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
1290 cant_find:
a1d180c4 1291 if ( BmRARE(littlestr) == '\n'
cf93c79d
IZ		 1292 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
1293 little = (unsigned char *)(SvPVX(littlestr));
1294 littleend = little + SvCUR(littlestr);
1295 first = *little++;
1296 goto check_tail;
1297 }
378cc40b 1298 return Nullch;
cf93c79d
IZ		 1299 }
1300
463ee0b2 1301 little = (unsigned char *)(SvPVX(littlestr));
79072805 1302 littleend = little + SvCUR(littlestr);
378cc40b 1303 first = *little++;
c277df42 1304 /* The value of pos we can start at: */
79072805 1305 previous = BmPREVIOUS(littlestr);
463ee0b2 1306 big = (unsigned char *)(SvPVX(bigstr));
c277df42
IZ		 1307 /* The value of pos we can stop at: */
1308 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
cf93c79d
IZ		 1309 if (previous + start_shift > stop_pos) {
1310 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
1311 goto check_tail;
1312 return Nullch;
1313 }
c277df42 1314 while (pos < previous + start_shift) {
3280af22 1315 if (!(pos += PL_screamnext[pos]))
cf93c79d 1316 goto cant_find;
378cc40b 1317 }
de3bb511 1318#ifdef POINTERRIGOR
bbce6d69 1319 do {
ef64f398 1320 if (pos >= stop_pos) break;
bbce6d69 1321 if (big[pos-previous] != first)
1322 continue;
1323 for (x=big+pos+1-previous,s=little; s < littleend; /**/ ) {
bbce6d69 1324 if (*s++ != *x++) {
1325 s--;
1326 break;
de3bb511 1327 }
bbce6d69 1328 }
c277df42
IZ		 1329 if (s == littleend) {
1330 *old_posp = pos;
1331 if (!last) return (char *)(big+pos-previous);
1332 found = 1;
1333 }
6b88bc9c 1334 } while ( pos += PL_screamnext[pos] );
c277df42 1335 return (last && found) ? (char *)(big+(*old_posp)-previous) : Nullch;
de3bb511
LW		 1336#else /* !POINTERRIGOR */
1337 big -= previous;
bbce6d69 1338 do {
ef64f398 1339 if (pos >= stop_pos) break;
bbce6d69 1340 if (big[pos] != first)
1341 continue;
1342 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
bbce6d69 1343 if (*s++ != *x++) {
1344 s--;
1345 break;
378cc40b 1346 }
bbce6d69 1347 }
c277df42
IZ		 1348 if (s == littleend) {
1349 *old_posp = pos;
1350 if (!last) return (char *)(big+pos);
1351 found = 1;
1352 }
3280af22 1353 } while ( pos += PL_screamnext[pos] );
a1d180c4 1354 if (last && found)
cf93c79d 1355 return (char *)(big+(*old_posp));
de3bb511 1356#endif /* POINTERRIGOR */
cf93c79d
IZ		 1357 check_tail:
1358 if (!SvTAIL(littlestr) || (end_shift > 0))
1359 return Nullch;
1360 /* Ignore the trailing "\n". This code is not microoptimized */
1361 big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
1362 stop_pos = littleend - little; /* Actual littlestr len */
1363 if (stop_pos == 0)
1364 return (char*)big;
1365 big -= stop_pos;
1366 if (*big == first
12ae5dfc
JH		 1367 && ((stop_pos == 1) ||
1368 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
cf93c79d
IZ		 1369 return (char*)big;
1370 return Nullch;
8d063cd8
LW		 1371}
1372
79072805 1373I32
864dbfa3 1374Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
79072805 1375{
bbce6d69 1376 register U8 *a = (U8 *)s1;
1377 register U8 *b = (U8 *)s2;
79072805 1378 while (len--) {
22c35a8c 1379 if (*a != *b && *a != PL_fold[*b])
bbce6d69 1380 return 1;
1381 a++,b++;
1382 }
1383 return 0;
1384}
1385
1386I32
864dbfa3 1387Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
bbce6d69 1388{
1389 register U8 *a = (U8 *)s1;
1390 register U8 *b = (U8 *)s2;
1391 while (len--) {
22c35a8c 1392 if (*a != *b && *a != PL_fold_locale[*b])
bbce6d69 1393 return 1;
1394 a++,b++;
79072805
LW		 1395 }
1396 return 0;
1397}
1398
8d063cd8
LW		 1399/* copy a string to a safe spot */
1400
954c1994
GS		 1401/*
1402=for apidoc savepv
1403
1404Copy a string to a safe spot. This does not use an SV.
1405
1406=cut
1407*/
1408
8d063cd8 1409char *
864dbfa3 1410Perl_savepv(pTHX_ const char *sv)
8d063cd8 1411{
a687059c 1412 register char *newaddr;
8d063cd8 1413
79072805
LW		 1414 New(902,newaddr,strlen(sv)+1,char);
1415 (void)strcpy(newaddr,sv);
8d063cd8
LW		 1416 return newaddr;
1417}
1418
a687059c
LW		 1419/* same thing but with a known length */
1420
954c1994
GS		 1421/*
1422=for apidoc savepvn
1423
1424Copy a string to a safe spot. The C<len> indicates number of bytes to
1425copy. This does not use an SV.
1426
1427=cut
1428*/
1429
a687059c 1430char *
864dbfa3 1431Perl_savepvn(pTHX_ const char *sv, register I32 len)
a687059c
LW		 1432{
1433 register char *newaddr;
1434
1435 New(903,newaddr,len+1,char);
79072805 1436 Copy(sv,newaddr,len,char); /* might not be null terminated */
a687059c
LW		 1437 newaddr[len] = '\0'; /* is now */
1438 return newaddr;
1439}
1440
cea2e8a9 1441/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1442
76e3520e 1443STATIC SV *
cea2e8a9 1444S_mess_alloc(pTHX)
fc36a67e 1445{
1446 SV *sv;
1447 XPVMG *any;
1448
e72dc28c
GS		 1449 if (!PL_dirty)
1450 return sv_2mortal(newSVpvn("",0));
1451
0372dbb6
GS		 1452 if (PL_mess_sv)
1453 return PL_mess_sv;
1454
fc36a67e 1455 /* Create as PVMG now, to avoid any upgrading later */
1456 New(905, sv, 1, SV);
1457 Newz(905, any, 1, XPVMG);
1458 SvFLAGS(sv) = SVt_PVMG;
1459 SvANY(sv) = (void*)any;
1460 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1461 PL_mess_sv = sv;
fc36a67e 1462 return sv;
1463}
1464
c5be433b 1465#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1466char *
1467Perl_form_nocontext(const char* pat, ...)
1468{
1469 dTHX;
c5be433b 1470 char *retval;
cea2e8a9
GS		 1471 va_list args;
1472 va_start(args, pat);
c5be433b 1473 retval = vform(pat, &args);
cea2e8a9 1474 va_end(args);
c5be433b 1475 return retval;
cea2e8a9 1476}
c5be433b 1477#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1478
8990e307 1479char *
864dbfa3 1480Perl_form(pTHX_ const char* pat, ...)
8990e307 1481{
c5be433b 1482 char *retval;
46fc3d4c 1483 va_list args;
46fc3d4c 1484 va_start(args, pat);
c5be433b 1485 retval = vform(pat, &args);
46fc3d4c 1486 va_end(args);
c5be433b
GS		 1487 return retval;
1488}
1489
1490char *
1491Perl_vform(pTHX_ const char *pat, va_list *args)
1492{
1493 SV *sv = mess_alloc();
1494 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
e72dc28c 1495 return SvPVX(sv);
46fc3d4c 1496}
a687059c 1497
5a844595
GS		 1498#if defined(PERL_IMPLICIT_CONTEXT)
1499SV *
1500Perl_mess_nocontext(const char *pat, ...)
1501{
1502 dTHX;
1503 SV *retval;
1504 va_list args;
1505 va_start(args, pat);
1506 retval = vmess(pat, &args);
1507 va_end(args);
1508 return retval;
1509}
1510#endif /* PERL_IMPLICIT_CONTEXT */
1511
06bf62c7 1512SV *
5a844595
GS		 1513Perl_mess(pTHX_ const char *pat, ...)
1514{
1515 SV *retval;
1516 va_list args;
1517 va_start(args, pat);
1518 retval = vmess(pat, &args);
1519 va_end(args);
1520 return retval;
1521}
1522
1523SV *
1524Perl_vmess(pTHX_ const char *pat, va_list *args)
46fc3d4c 1525{
e72dc28c 1526 SV *sv = mess_alloc();
46fc3d4c 1527 static char dgd[] = " during global destruction.\n";
1528
fc36a67e 1529 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
46fc3d4c 1530 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
57843af0 1531 if (CopLINE(PL_curcop))
ed094faf
GS		 1532 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1533 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
515f54a1
GS		 1534 if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
1535 bool line_mode = (RsSIMPLE(PL_rs) &&
7c1e0849 1536 SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
57def98f 1537 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
cf2093f6 1538 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
a1d180c4 1539 line_mode ? "line" : "chunk",
cf2093f6 1540 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1541 }
9efbc0eb 1542#ifdef USE_THREADS
e8e6f333
GS		 1543 if (thr->tid)
1544 Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid);
9efbc0eb 1545#endif
515f54a1 1546 sv_catpv(sv, PL_dirty ? dgd : ".\n");
a687059c 1547 }
06bf62c7 1548 return sv;
a687059c
LW		 1549}
1550
c5be433b
GS		 1551OP *
1552Perl_vdie(pTHX_ const char* pat, va_list *args)
36477c24 1553{
36477c24 1554 char *message;
3280af22 1555 int was_in_eval = PL_in_eval;
36477c24 1556 HV *stash;
1557 GV *gv;
1558 CV *cv;
06bf62c7
GS		 1559 SV *msv;
1560 STRLEN msglen;
36477c24 1561
bf49b057 1562 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1563 "%p: die: curstack = %p, mainstack = %p\n",
533c011a 1564 thr, PL_curstack, PL_mainstack));
36477c24 1565
06bf62c7 1566 if (pat) {
5a844595
GS		 1567 msv = vmess(pat, args);
1568 if (PL_errors && SvCUR(PL_errors)) {
1569 sv_catsv(PL_errors, msv);
1570 message = SvPV(PL_errors, msglen);
1571 SvCUR_set(PL_errors, 0);
1572 }
1573 else
1574 message = SvPV(msv,msglen);
06bf62c7
GS		 1575 }
1576 else {
1577 message = Nullch;
0f79a09d 1578 msglen = 0;
06bf62c7 1579 }
36477c24 1580
bf49b057 1581 DEBUG_S(PerlIO_printf(Perl_debug_log,
199100c8 1582 "%p: die: message = %s\ndiehook = %p\n",
533c011a 1583 thr, message, PL_diehook));
3280af22 1584 if (PL_diehook) {
cea2e8a9 1585 /* sv_2cv might call Perl_croak() */
3280af22 1586 SV *olddiehook = PL_diehook;
1738f5c4 1587 ENTER;
3280af22
NIS		 1588 SAVESPTR(PL_diehook);
1589 PL_diehook = Nullsv;
1738f5c4
CS		 1590 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1591 LEAVE;
1592 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1593 dSP;
774d564b 1594 SV *msg;
1595
1596 ENTER;
3a1f2dc9 1597 save_re_context();
79cb57f6 1598 if (message) {
06bf62c7 1599 msg = newSVpvn(message, msglen);
4e6ea2c3
GS		 1600 SvREADONLY_on(msg);
1601 SAVEFREESV(msg);
1602 }
1603 else {
1604 msg = ERRSV;
1605 }
1738f5c4 1606
e788e7d3 1607 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1608 PUSHMARK(SP);
1738f5c4
CS		 1609 XPUSHs(msg);
1610 PUTBACK;
0cdb2077 1611 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1612 POPSTACK;
774d564b 1613 LEAVE;
1738f5c4 1614 }
36477c24 1615 }
1616
06bf62c7 1617 PL_restartop = die_where(message, msglen);
bf49b057 1618 DEBUG_S(PerlIO_printf(Perl_debug_log,
7c06b590 1619 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
533c011a 1620 thr, PL_restartop, was_in_eval, PL_top_env));
3280af22 1621 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
6224f72b 1622 JMPENV_JUMP(3);
3280af22 1623 return PL_restartop;
36477c24 1624}
1625
c5be433b 1626#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1627OP *
1628Perl_die_nocontext(const char* pat, ...)
a687059c 1629{
cea2e8a9
GS		 1630 dTHX;
1631 OP *o;
a687059c 1632 va_list args;
cea2e8a9 1633 va_start(args, pat);
c5be433b 1634 o = vdie(pat, &args);
cea2e8a9
GS		 1635 va_end(args);
1636 return o;
1637}
c5be433b 1638#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS		 1639
1640OP *
1641Perl_die(pTHX_ const char* pat, ...)
1642{
1643 OP *o;
1644 va_list args;
1645 va_start(args, pat);
c5be433b 1646 o = vdie(pat, &args);
cea2e8a9
GS		 1647 va_end(args);
1648 return o;
1649}
1650
c5be433b
GS		 1651void
1652Perl_vcroak(pTHX_ const char* pat, va_list *args)
cea2e8a9 1653{
de3bb511 1654 char *message;
748a9306
LW		 1655 HV *stash;
1656 GV *gv;
1657 CV *cv;
06bf62c7
GS		 1658 SV *msv;
1659 STRLEN msglen;
a687059c 1660
9983fa3c
GS		 1661 if (pat) {
1662 msv = vmess(pat, args);
1663 if (PL_errors && SvCUR(PL_errors)) {
1664 sv_catsv(PL_errors, msv);
1665 message = SvPV(PL_errors, msglen);
1666 SvCUR_set(PL_errors, 0);
1667 }
1668 else
1669 message = SvPV(msv,msglen);
1670 }
1671 else {
1672 message = Nullch;
1673 msglen = 0;
5a844595 1674 }
5a844595 1675
b900a521
JH		 1676 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
1677 PTR2UV(thr), message));
5a844595 1678
3280af22 1679 if (PL_diehook) {
cea2e8a9 1680 /* sv_2cv might call Perl_croak() */
3280af22 1681 SV *olddiehook = PL_diehook;
1738f5c4 1682 ENTER;
3280af22
NIS		 1683 SAVESPTR(PL_diehook);
1684 PL_diehook = Nullsv;
20cec16a 1685 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1738f5c4
CS		 1686 LEAVE;
1687 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1688 dSP;
774d564b 1689 SV *msg;
1690
1691 ENTER;
3a1f2dc9 1692 save_re_context();
9983fa3c
GS		 1693 if (message) {
1694 msg = newSVpvn(message, msglen);
1695 SvREADONLY_on(msg);
1696 SAVEFREESV(msg);
1697 }
1698 else {
1699 msg = ERRSV;
1700 }
20cec16a 1701
e788e7d3 1702 PUSHSTACKi(PERLSI_DIEHOOK);
924508f0 1703 PUSHMARK(SP);
1738f5c4 1704 XPUSHs(msg);
20cec16a 1705 PUTBACK;
864dbfa3 1706 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1707 POPSTACK;
774d564b 1708 LEAVE;
20cec16a 1709 }
748a9306 1710 }
3280af22 1711 if (PL_in_eval) {
06bf62c7 1712 PL_restartop = die_where(message, msglen);
6224f72b 1713 JMPENV_JUMP(3);
a0d0e21e 1714 }
d175a3f0
GS		 1715 {
1716#ifdef USE_SFIO
1717 /* SFIO can really mess with your errno */
1718 int e = errno;
1719#endif
bf49b057
GS		 1720 PerlIO *serr = Perl_error_log;
1721
1722 PerlIO_write(serr, message, msglen);
1723 (void)PerlIO_flush(serr);
d175a3f0
GS		 1724#ifdef USE_SFIO
1725 errno = e;
1726#endif
1727 }
f86702cc 1728 my_failure_exit();
a687059c
LW		 1729}
1730
c5be433b 1731#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1732void
cea2e8a9 1733Perl_croak_nocontext(const char *pat, ...)
a687059c 1734{
cea2e8a9 1735 dTHX;
a687059c 1736 va_list args;
cea2e8a9 1737 va_start(args, pat);
c5be433b 1738 vcroak(pat, &args);
cea2e8a9
GS		 1739 /* NOTREACHED */
1740 va_end(args);
1741}
1742#endif /* PERL_IMPLICIT_CONTEXT */
1743
954c1994
GS		 1744/*
1745=for apidoc croak
1746
9983fa3c
GS		 1747This is the XSUB-writer's interface to Perl's C<die> function.
1748Normally use this function the same way you use the C C<printf>
1749function. See C<warn>.
1750
1751If you want to throw an exception object, assign the object to
1752C<$@> and then pass C<Nullch> to croak():
1753
1754 errsv = get_sv("@", TRUE);
1755 sv_setsv(errsv, exception_object);
1756 croak(Nullch);
954c1994
GS		 1757
1758=cut
1759*/
1760
cea2e8a9
GS		 1761void
1762Perl_croak(pTHX_ const char *pat, ...)
1763{
1764 va_list args;
1765 va_start(args, pat);
c5be433b 1766 vcroak(pat, &args);
cea2e8a9
GS		 1767 /* NOTREACHED */
1768 va_end(args);
1769}
1770
c5be433b
GS		 1771void
1772Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1773{
de3bb511 1774 char *message;
748a9306
LW		 1775 HV *stash;
1776 GV *gv;
1777 CV *cv;
06bf62c7
GS		 1778 SV *msv;
1779 STRLEN msglen;
a687059c 1780
5a844595 1781 msv = vmess(pat, args);
06bf62c7 1782 message = SvPV(msv, msglen);
a687059c 1783
3280af22 1784 if (PL_warnhook) {
cea2e8a9 1785 /* sv_2cv might call Perl_warn() */
3280af22 1786 SV *oldwarnhook = PL_warnhook;
1738f5c4 1787 ENTER;
3280af22
NIS		 1788 SAVESPTR(PL_warnhook);
1789 PL_warnhook = Nullsv;
20cec16a 1790 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
1738f5c4
CS		 1791 LEAVE;
1792 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
20cec16a 1793 dSP;
774d564b 1794 SV *msg;
1795
1796 ENTER;
3a1f2dc9 1797 save_re_context();
06bf62c7 1798 msg = newSVpvn(message, msglen);
774d564b 1799 SvREADONLY_on(msg);
1800 SAVEFREESV(msg);
1801
e788e7d3 1802 PUSHSTACKi(PERLSI_WARNHOOK);
924508f0 1803 PUSHMARK(SP);
774d564b 1804 XPUSHs(msg);
20cec16a 1805 PUTBACK;
864dbfa3 1806 call_sv((SV*)cv, G_DISCARD);
d3acc0f7 1807 POPSTACK;
774d564b 1808 LEAVE;
20cec16a 1809 return;
1810 }
748a9306 1811 }
bf49b057
GS		 1812 {
1813 PerlIO *serr = Perl_error_log;
1814
1815 PerlIO_write(serr, message, msglen);
a687059c 1816#ifdef LEAKTEST
a1d180c4 1817 DEBUG_L(*message == '!'
bf49b057
GS		 1818 ? (xstat(message[1]=='!'
1819 ? (message[2]=='!' ? 2 : 1)
1820 : 0)
1821 , 0)
1822 : 0);
a687059c 1823#endif
bf49b057
GS		 1824 (void)PerlIO_flush(serr);
1825 }
a687059c 1826}
8d063cd8 1827
c5be433b 1828#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS		 1829void
1830Perl_warn_nocontext(const char *pat, ...)
1831{
1832 dTHX;
1833 va_list args;
1834 va_start(args, pat);
c5be433b 1835 vwarn(pat, &args);
cea2e8a9
GS		 1836 va_end(args);
1837}
1838#endif /* PERL_IMPLICIT_CONTEXT */
1839
954c1994
GS		 1840/*
1841=for apidoc warn
1842
1843This is the XSUB-writer's interface to Perl's C<warn> function. Use this
1844function the same way you use the C C<printf> function. See
1845C<croak>.
1846
1847=cut
1848*/
1849
cea2e8a9
GS		 1850void
1851Perl_warn(pTHX_ const char *pat, ...)
1852{
1853 va_list args;
1854 va_start(args, pat);
c5be433b 1855 vwarn(pat, &args);
cea2e8a9
GS		 1856 va_end(args);
1857}
1858
c5be433b
GS		 1859#if defined(PERL_IMPLICIT_CONTEXT)
1860void
1861Perl_warner_nocontext(U32 err, const char *pat, ...)
1862{
1863 dTHX;
1864 va_list args;
1865 va_start(args, pat);
1866 vwarner(err, pat, &args);
1867 va_end(args);
1868}
1869#endif /* PERL_IMPLICIT_CONTEXT */
1870
599cee73 1871void
864dbfa3 1872Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM		 1873{
1874 va_list args;
c5be433b
GS		 1875 va_start(args, pat);
1876 vwarner(err, pat, &args);
1877 va_end(args);
1878}
1879
1880void
1881Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1882{
599cee73
PM		 1883 char *message;
1884 HV *stash;
1885 GV *gv;
1886 CV *cv;
06bf62c7
GS		 1887 SV *msv;
1888 STRLEN msglen;
599cee73 1889
5a844595 1890 msv = vmess(pat, args);
06bf62c7 1891 message = SvPV(msv, msglen);
599cee73
PM		 1892
1893 if (ckDEAD(err)) {
1894#ifdef USE_THREADS
b900a521 1895 DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message));
599cee73
PM		 1896#endif /* USE_THREADS */
1897 if (PL_diehook) {
cea2e8a9 1898 /* sv_2cv might call Perl_croak() */
599cee73
PM		 1899 SV *olddiehook = PL_diehook;
1900 ENTER;
1901 SAVESPTR(PL_diehook);
1902 PL_diehook = Nullsv;
1903 cv = sv_2cv(olddiehook, &stash, &gv, 0);
1904 LEAVE;
1905 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1906 dSP;
1907 SV *msg;
a1d180c4 1908
599cee73 1909 ENTER;
3a1f2dc9 1910 save_re_context();
06bf62c7 1911 msg = newSVpvn(message, msglen);
599cee73
PM		 1912 SvREADONLY_on(msg);
1913 SAVEFREESV(msg);
a1d180c4 1914
3a1f2dc9 1915 PUSHSTACKi(PERLSI_DIEHOOK);
599cee73
PM		 1916 PUSHMARK(sp);
1917 XPUSHs(msg);
1918 PUTBACK;
864dbfa3 1919 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1920 POPSTACK;
599cee73
PM		 1921 LEAVE;
1922 }
1923 }
1924 if (PL_in_eval) {
06bf62c7 1925 PL_restartop = die_where(message, msglen);
599cee73
PM		 1926 JMPENV_JUMP(3);
1927 }
bf49b057
GS		 1928 {
1929 PerlIO *serr = Perl_error_log;
1930 PerlIO_write(serr, message, msglen);
1931 (void)PerlIO_flush(serr);
1932 }
599cee73
PM		 1933 my_failure_exit();
1934
1935 }
1936 else {
1937 if (PL_warnhook) {
cea2e8a9 1938 /* sv_2cv might call Perl_warn() */
599cee73
PM		 1939 SV *oldwarnhook = PL_warnhook;
1940 ENTER;
1941 SAVESPTR(PL_warnhook);
1942 PL_warnhook = Nullsv;
1943 cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
3a1f2dc9 1944 LEAVE;
599cee73
PM		 1945 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1946 dSP;
1947 SV *msg;
a1d180c4 1948
599cee73 1949 ENTER;
3a1f2dc9 1950 save_re_context();
06bf62c7 1951 msg = newSVpvn(message, msglen);
599cee73
PM		 1952 SvREADONLY_on(msg);
1953 SAVEFREESV(msg);
a1d180c4 1954
3a1f2dc9 1955 PUSHSTACKi(PERLSI_WARNHOOK);
599cee73
PM		 1956 PUSHMARK(sp);
1957 XPUSHs(msg);
1958 PUTBACK;
864dbfa3 1959 call_sv((SV*)cv, G_DISCARD);
3a1f2dc9 1960 POPSTACK;
599cee73
PM		 1961 LEAVE;
1962 return;
1963 }
1964 }
bf49b057
GS		 1965 {
1966 PerlIO *serr = Perl_error_log;
1967 PerlIO_write(serr, message, msglen);
599cee73 1968#ifdef LEAKTEST
a1d180c4 1969 DEBUG_L(*message == '!'
06247ec9
JH		 1970 ? (xstat(message[1]=='!'
1971 ? (message[2]=='!' ? 2 : 1)
1972 : 0)
1973 , 0)
1974 : 0);
599cee73 1975#endif
bf49b057
GS		 1976 (void)PerlIO_flush(serr);
1977 }
599cee73
PM		 1978 }
1979}
1980
13b6e58c
JH		 1981#ifdef USE_ENVIRON_ARRAY
1982 /* VMS' and EPOC's my_setenv() is in vms.c and epoc.c */
47dafe4d 1983#if !defined(WIN32)
8d063cd8 1984void
864dbfa3 1985Perl_my_setenv(pTHX_ char *nam, char *val)
8d063cd8 1986{
f2517201
GS		 1987#ifndef PERL_USE_SAFE_PUTENV
1988 /* most putenv()s leak, so we manipulate environ directly */
79072805 1989 register I32 i=setenv_getix(nam); /* where does it go? */
8d063cd8 1990
3280af22 1991 if (environ == PL_origenviron) { /* need we copy environment? */
79072805
LW		 1992 I32 j;
1993 I32 max;
fe14fcc3
LW		 1994 char **tmpenv;
1995
de3bb511 1996 /*SUPPRESS 530*/
fe14fcc3 1997 for (max = i; environ[max]; max++) ;
f2517201
GS		 1998 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1999 for (j=0; j<max; j++) { /* copy environment */
2000 tmpenv[j] = (char*)safesysmalloc((strlen(environ[j])+1)*sizeof(char));
2001 strcpy(tmpenv[j], environ[j]);
2002 }
fe14fcc3
LW		 2003 tmpenv[max] = Nullch;
2004 environ = tmpenv; /* tell exec where it is now */
2005 }
a687059c 2006 if (!val) {
f2517201 2007 safesysfree(environ[i]);
a687059c
LW		 2008 while (environ[i]) {
2009 environ[i] = environ[i+1];
2010 i++;
2011 }
2012 return;
2013 }
8d063cd8 2014 if (!environ[i]) { /* does not exist yet */
f2517201 2015 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
8d063cd8
LW		 2016 environ[i+1] = Nullch; /* make sure it's null terminated */
2017 }
fe14fcc3 2018 else
f2517201
GS		 2019 safesysfree(environ[i]);
2020 environ[i] = (char*)safesysmalloc((strlen(nam)+strlen(val)+2) * sizeof(char));
2021
a687059c 2022 (void)sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
f2517201
GS		 2023
2024#else /* PERL_USE_SAFE_PUTENV */
47dafe4d
EF		 2025# if defined(__CYGWIN__)
2026 setenv(nam, val, 1);
2027# else
f2517201
GS		 2028 char *new_env;
2029
2030 new_env = (char*)safesysmalloc((strlen(nam) + strlen(val) + 2) * sizeof(char));
f2517201 2031 (void)sprintf(new_env,"%s=%s",nam,val);/* all that work just for this */
f2517201 2032 (void)putenv(new_env);
47dafe4d 2033# endif /* __CYGWIN__ */
f2517201 2034#endif /* PERL_USE_SAFE_PUTENV */
8d063cd8
LW		 2035}
2036
47dafe4d 2037#else /* WIN32 */
68dc0745 2038
2039void
864dbfa3 2040Perl_my_setenv(pTHX_ char *nam,char *val)
68dc0745 2041{
ac5c734f
GS		 2042 register char *envstr;
2043 STRLEN len = strlen(nam) + 3;
2044 if (!val) {
2045 val = "";
2046 }
2047 len += strlen(val);
2048 New(904, envstr, len, char);
2049 (void)sprintf(envstr,"%s=%s",nam,val);
2050 (void)PerlEnv_putenv(envstr);
2051 Safefree(envstr);
3e3baf6d
TB		 2052}
2053
2054#endif /* WIN32 */
2055
2056I32
864dbfa3 2057Perl_setenv_getix(pTHX_ char *nam)
3e3baf6d
TB		 2058{
2059 register I32 i, len = strlen(nam);
2060
2061 for (i = 0; environ[i]; i++) {
2062 if (
2063#ifdef WIN32
2064 strnicmp(environ[i],nam,len) == 0
2065#else
2066 strnEQ(environ[i],nam,len)
2067#endif
2068 && environ[i][len] == '=')
2069 break; /* strnEQ must come first to avoid */
2070 } /* potential SEGV's */
2071 return i;
68dc0745 2072}
2073
ed79a026 2074#endif /* !VMS && !EPOC*/
378cc40b 2075
16d20bd9 2076#ifdef UNLINK_ALL_VERSIONS
79072805 2077I32
864dbfa3 2078Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
378cc40b 2079{
79072805 2080 I32 i;
378cc40b 2081
6ad3d225 2082 for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
378cc40b
LW		 2083 return i ? 0 : -1;
2084}
2085#endif
2086
7a3f2258 2087/* this is a drop-in replacement for bcopy() */
85e6fe83 2088#if !defined(HAS_BCOPY) || !defined(HAS_SAFE_BCOPY)
378cc40b 2089char *
7a3f2258 2090Perl_my_bcopy(register const char *from,register char *to,register I32 len)
378cc40b
LW		 2091{
2092 char *retval = to;
2093
7c0587c8
LW		 2094 if (from - to >= 0) {
2095 while (len--)
2096 *to++ = *from++;
2097 }
2098 else {
2099 to += len;
2100 from += len;
2101 while (len--)
faf8582f 2102 *(--to) = *(--from);
7c0587c8 2103 }
378cc40b
LW		 2104 return retval;
2105}
ffed7fef 2106#endif
378cc40b 2107
7a3f2258 2108/* this is a drop-in replacement for memset() */
fc36a67e 2109#ifndef HAS_MEMSET
2110void *
7a3f2258 2111Perl_my_memset(register char *loc, register I32 ch, register I32 len)
fc36a67e 2112{
2113 char *retval = loc;
2114
2115 while (len--)
2116 *loc++ = ch;
2117 return retval;
2118}
2119#endif
2120
7a3f2258 2121/* this is a drop-in replacement for bzero() */
7c0587c8 2122#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 2123char *
7a3f2258 2124Perl_my_bzero(register char *loc, register I32 len)
378cc40b
LW		 2125{
2126 char *retval = loc;
2127
2128 while (len--)
2129 *loc++ = 0;
2130 return retval;
2131}
2132#endif
7c0587c8 2133
7a3f2258 2134/* this is a drop-in replacement for memcmp() */
36477c24 2135#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 2136I32
7a3f2258 2137Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
7c0587c8 2138{
36477c24 2139 register U8 *a = (U8 *)s1;
2140 register U8 *b = (U8 *)s2;
79072805 2141 register I32 tmp;
7c0587c8
LW		 2142
2143 while (len--) {
36477c24 2144 if (tmp = *a++ - *b++)
7c0587c8
LW		 2145 return tmp;
2146 }
2147 return 0;
2148}
36477c24 2149#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 2150
fe14fcc3 2151#ifndef HAS_VPRINTF
a687059c 2152
85e6fe83 2153#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 2154char *
2155#else
2156int
2157#endif
08105a92 2158vsprintf(char *dest, const char *pat, char *args)
a687059c
LW		 2159{
2160 FILE fakebuf;
2161
2162 fakebuf._ptr = dest;
2163 fakebuf._cnt = 32767;
35c8bce7
LW		 2164#ifndef _IOSTRG
2165#define _IOSTRG 0
2166#endif
a687059c
LW		 2167 fakebuf._flag = _IOWRT|_IOSTRG;
2168 _doprnt(pat, args, &fakebuf); /* what a kludge */
2169 (void)putc('\0', &fakebuf);
85e6fe83 2170#ifdef USE_CHAR_VSPRINTF
a687059c
LW		 2171 return(dest);
2172#else
2173 return 0; /* perl doesn't use return value */
2174#endif
2175}
2176
fe14fcc3 2177#endif /* HAS_VPRINTF */
a687059c
LW		 2178
2179#ifdef MYSWAP
ffed7fef 2180#if BYTEORDER != 0x4321
a687059c 2181short
864dbfa3 2182Perl_my_swap(pTHX_ short s)
a687059c
LW		 2183{
2184#if (BYTEORDER & 1) == 0
2185 short result;
2186
2187 result = ((s & 255) << 8) + ((s >> 8) & 255);
2188 return result;
2189#else
2190 return s;
2191#endif
2192}
2193
2194long
864dbfa3 2195Perl_my_htonl(pTHX_ long l)
a687059c
LW		 2196{
2197 union {
2198 long result;
ffed7fef 2199 char c[sizeof(long)];
a687059c
LW		 2200 } u;
2201
ffed7fef 2202#if BYTEORDER == 0x1234
a687059c
LW		 2203 u.c[0] = (l >> 24) & 255;
2204 u.c[1] = (l >> 16) & 255;
2205 u.c[2] = (l >> 8) & 255;
2206 u.c[3] = l & 255;
2207 return u.result;
2208#else
ffed7fef 2209#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2210 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2211#else
79072805
LW		 2212 register I32 o;
2213 register I32 s;
a687059c 2214
ffed7fef
LW		 2215 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2216 u.c[o & 0xf] = (l >> s) & 255;
a687059c
LW		 2217 }
2218 return u.result;
2219#endif
2220#endif
2221}
2222
2223long
864dbfa3 2224Perl_my_ntohl(pTHX_ long l)
a687059c
LW		 2225{
2226 union {
2227 long l;
ffed7fef 2228 char c[sizeof(long)];
a687059c
LW		 2229 } u;
2230
ffed7fef 2231#if BYTEORDER == 0x1234
a687059c
LW		 2232 u.c[0] = (l >> 24) & 255;
2233 u.c[1] = (l >> 16) & 255;
2234 u.c[2] = (l >> 8) & 255;
2235 u.c[3] = l & 255;
2236 return u.l;
2237#else
ffed7fef 2238#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
cea2e8a9 2239 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
a687059c 2240#else
79072805
LW		 2241 register I32 o;
2242 register I32 s;
a687059c
LW		 2243
2244 u.l = l;
2245 l = 0;
ffed7fef
LW		 2246 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
2247 l |= (u.c[o & 0xf] & 255) << s;
a687059c
LW		 2248 }
2249 return l;
2250#endif
2251#endif
2252}
2253
ffed7fef 2254#endif /* BYTEORDER != 0x4321 */
988174c1
LW		 2255#endif /* MYSWAP */
2256
2257/*
2258 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2259 * If these functions are defined,
2260 * the BYTEORDER is neither 0x1234 nor 0x4321.
2261 * However, this is not assumed.
2262 * -DWS
2263 */
2264
2265#define HTOV(name,type) \
2266 type \
ba106d47 2267 name (register type n) \
988174c1
LW		 2268 { \
2269 union { \
2270 type value; \
2271 char c[sizeof(type)]; \
2272 } u; \
79072805
LW		 2273 register I32 i; \
2274 register I32 s; \
988174c1
LW		 2275 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2276 u.c[i] = (n >> s) & 0xFF; \
2277 } \
2278 return u.value; \
2279 }
2280
2281#define VTOH(name,type) \
2282 type \
ba106d47 2283 name (register type n) \
988174c1
LW		 2284 { \
2285 union { \
2286 type value; \
2287 char c[sizeof(type)]; \
2288 } u; \
79072805
LW		 2289 register I32 i; \
2290 register I32 s; \
988174c1
LW		 2291 u.value = n; \
2292 n = 0; \
2293 for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
2294 n += (u.c[i] & 0xFF) << s; \
2295 } \
2296 return n; \
2297 }
2298
2299#if defined(HAS_HTOVS) && !defined(htovs)
2300HTOV(htovs,short)
2301#endif
2302#if defined(HAS_HTOVL) && !defined(htovl)
2303HTOV(htovl,long)
2304#endif
2305#if defined(HAS_VTOHS) && !defined(vtohs)
2306VTOH(vtohs,short)
2307#endif
2308#if defined(HAS_VTOHL) && !defined(vtohl)
2309VTOH(vtohl,long)
2310#endif
a687059c 2311
4a7d1889
NIS		 2312PerlIO *
2313Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2314{
1f852d0d
NIS		 2315#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
2316 int p[2];
2317 register I32 This, that;
2318 register Pid_t pid;
2319 SV *sv;
2320 I32 did_pipes = 0;
2321 int pp[2];
2322
2323 PERL_FLUSHALL_FOR_CHILD;
2324 This = (*mode == 'w');
2325 that = !This;
2326 if (PL_tainting) {
2327 taint_env();
2328 taint_proper("Insecure %s%s", "EXEC");
2329 }
2330 if (PerlProc_pipe(p) < 0)
2331 return Nullfp;
2332 /* Try for another pipe pair for error return */
2333 if (PerlProc_pipe(pp) >= 0)
2334 did_pipes = 1;
2335 while ((pid = vfork()) < 0) {
2336 if (errno != EAGAIN) {
2337 PerlLIO_close(p[This]);
2338 if (did_pipes) {
2339 PerlLIO_close(pp[0]);
2340 PerlLIO_close(pp[1]);
2341 }
2342 return Nullfp;
2343 }
2344 sleep(5);
2345 }
2346 if (pid == 0) {
2347 /* Child */
1f852d0d
NIS		 2348#undef THIS
2349#undef THAT
2350#define THIS that
2351#define THAT This
2352 /* Close parent's end of _the_ pipe */
2353 PerlLIO_close(p[THAT]);
2354 /* Close parent's end of error status pipe (if any) */
2355 if (did_pipes) {
2356 PerlLIO_close(pp[0]);
2357#if defined(HAS_FCNTL) && defined(F_SETFD)
2358 /* Close error pipe automatically if exec works */
2359 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2360#endif
2361 }
2362 /* Now dup our end of _the_ pipe to right position */
2363 if (p[THIS] != (*mode == 'r')) {
2364 PerlLIO_dup2(p[THIS], *mode == 'r');
2365 PerlLIO_close(p[THIS]);
2366 }
2367#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2368 /* No automatic close - do it by hand */
b7953727
JH		 2369# ifndef NOFILE
2370# define NOFILE 20
2371# endif
a080fe3d
NIS		 2372 {
2373 int fd;
2374
2375 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2376 if (fd != pp[1])
2377 PerlLIO_close(fd);
2378 }
1f852d0d
NIS		 2379 }
2380#endif
2381 do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
2382 PerlProc__exit(1);
2383#undef THIS
2384#undef THAT
2385 }
2386 /* Parent */
2387 do_execfree(); /* free any memory malloced by child on vfork */
2388 /* Close child's end of pipe */
2389 PerlLIO_close(p[that]);
2390 if (did_pipes)
2391 PerlLIO_close(pp[1]);
2392 /* Keep the lower of the two fd numbers */
2393 if (p[that] < p[This]) {
2394 PerlLIO_dup2(p[This], p[that]);
2395 PerlLIO_close(p[This]);
2396 p[This] = p[that];
2397 }
2398 LOCK_FDPID_MUTEX;
2399 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2400 UNLOCK_FDPID_MUTEX;
2401 (void)SvUPGRADE(sv,SVt_IV);
2402 SvIVX(sv) = pid;
2403 PL_forkprocess = pid;
2404 /* If we managed to get status pipe check for exec fail */
2405 if (did_pipes && pid > 0) {
2406 int errkid;
2407 int n = 0, n1;
2408
2409 while (n < sizeof(int)) {
2410 n1 = PerlLIO_read(pp[0],
2411 (void*)(((char*)&errkid)+n),
2412 (sizeof(int)) - n);
2413 if (n1 <= 0)
2414 break;
2415 n += n1;
2416 }
2417 PerlLIO_close(pp[0]);
2418 did_pipes = 0;
2419 if (n) { /* Error */
2420 int pid2, status;
2421 if (n != sizeof(int))
2422 Perl_croak(aTHX_ "panic: kid popen errno read");
2423 do {
2424 pid2 = wait4pid(pid, &status, 0);
2425 } while (pid2 == -1 && errno == EINTR);
2426 errno = errkid; /* Propagate errno from kid */
2427 return Nullfp;
2428 }
2429 }
2430 if (did_pipes)
2431 PerlLIO_close(pp[0]);
2432 return PerlIO_fdopen(p[This], mode);
2433#else
4a7d1889
NIS		 2434 Perl_croak(aTHX_ "List form of piped open not implemented");
2435 return (PerlIO *) NULL;
1f852d0d 2436#endif
4a7d1889
NIS		 2437}
2438
5f05dabc 2439 /* VMS' my_popen() is in VMS.c, same with OS/2. */
cd39f2b6 2440#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
760ac839 2441PerlIO *
864dbfa3 2442Perl_my_popen(pTHX_ char *cmd, char *mode)
a687059c
LW		 2443{
2444 int p[2];
8ac85365 2445 register I32 This, that;
d8a83dd3 2446 register Pid_t pid;
79072805 2447 SV *sv;
1738f5c4 2448 I32 doexec = strNE(cmd,"-");
e446cec8
IZ		 2449 I32 did_pipes = 0;
2450 int pp[2];
a687059c 2451
45bc9206 2452 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ		 2453#ifdef OS2
2454 if (doexec) {
23da6c43 2455 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2456 }
a1d180c4 2457#endif
8ac85365
NIS		 2458 This = (*mode == 'w');
2459 that = !This;
3280af22 2460 if (doexec && PL_tainting) {
bbce6d69 2461 taint_env();
2462 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2463 }
c2267164
IZ		 2464 if (PerlProc_pipe(p) < 0)
2465 return Nullfp;
e446cec8
IZ		 2466 if (doexec && PerlProc_pipe(pp) >= 0)
2467 did_pipes = 1;
a687059c
LW		 2468 while ((pid = (doexec?vfork():fork())) < 0) {
2469 if (errno != EAGAIN) {
6ad3d225 2470 PerlLIO_close(p[This]);
e446cec8
IZ		 2471 if (did_pipes) {
2472 PerlLIO_close(pp[0]);
2473 PerlLIO_close(pp[1]);
2474 }
a687059c 2475 if (!doexec)
cea2e8a9 2476 Perl_croak(aTHX_ "Can't fork");
a687059c
LW		 2477 return Nullfp;
2478 }
2479 sleep(5);
2480 }
2481 if (pid == 0) {
79072805
LW		 2482 GV* tmpgv;
2483
30ac6d9b
GS		 2484#undef THIS
2485#undef THAT
a687059c 2486#define THIS that
8ac85365 2487#define THAT This
6ad3d225 2488 PerlLIO_close(p[THAT]);
e446cec8
IZ		 2489 if (did_pipes) {
2490 PerlLIO_close(pp[0]);
2491#if defined(HAS_FCNTL) && defined(F_SETFD)
2492 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2493#endif
2494 }
a687059c 2495 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS		 2496 PerlLIO_dup2(p[THIS], *mode == 'r');
2497 PerlLIO_close(p[THIS]);
a687059c 2498 }
4435c477 2499#ifndef OS2
a687059c 2500 if (doexec) {
a0d0e21e 2501#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW		 2502 int fd;
2503
2504#ifndef NOFILE
2505#define NOFILE 20
2506#endif
a080fe3d
NIS		 2507 {
2508 int fd;
2509
2510 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2511 if (fd != pp[1])
2512 PerlLIO_close(fd);
2513 }
ae986130 2514#endif
a080fe3d
NIS		 2515 /* may or may not use the shell */
2516 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2517 PerlProc__exit(1);
a687059c 2518 }
4435c477 2519#endif /* defined OS2 */
de3bb511 2520 /*SUPPRESS 560*/
155aba94 2521 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV)))
7766f137 2522 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
3280af22
NIS		 2523 PL_forkprocess = 0;
2524 hv_clear(PL_pidstatus); /* we have no children */
a687059c
LW		 2525 return Nullfp;
2526#undef THIS
2527#undef THAT
2528 }
62b28dd9 2529 do_execfree(); /* free any memory malloced by child on vfork */
6ad3d225 2530 PerlLIO_close(p[that]);
e446cec8
IZ		 2531 if (did_pipes)
2532 PerlLIO_close(pp[1]);
8ac85365 2533 if (p[that] < p[This]) {
6ad3d225
GS		 2534 PerlLIO_dup2(p[This], p[that]);
2535 PerlLIO_close(p[This]);
8ac85365 2536 p[This] = p[that];
62b28dd9 2537 }
4755096e 2538 LOCK_FDPID_MUTEX;
3280af22 2539 sv = *av_fetch(PL_fdpid,p[This],TRUE);
4755096e 2540 UNLOCK_FDPID_MUTEX;
a0d0e21e 2541 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2542 SvIVX(sv) = pid;
3280af22 2543 PL_forkprocess = pid;
e446cec8
IZ		 2544 if (did_pipes && pid > 0) {
2545 int errkid;
2546 int n = 0, n1;
2547
2548 while (n < sizeof(int)) {
2549 n1 = PerlLIO_read(pp[0],
2550 (void*)(((char*)&errkid)+n),
2551 (sizeof(int)) - n);
2552 if (n1 <= 0)
2553 break;
2554 n += n1;
2555 }
2f96c702
IZ		 2556 PerlLIO_close(pp[0]);
2557 did_pipes = 0;
e446cec8 2558 if (n) { /* Error */
faa466a7 2559 int pid2, status;
e446cec8 2560 if (n != sizeof(int))
cea2e8a9 2561 Perl_croak(aTHX_ "panic: kid popen errno read");
faa466a7
RG		 2562 do {
2563 pid2 = wait4pid(pid, &status, 0);
2564 } while (pid2 == -1 && errno == EINTR);
e446cec8
IZ		 2565 errno = errkid; /* Propagate errno from kid */
2566 return Nullfp;
2567 }
2568 }
2569 if (did_pipes)
2570 PerlLIO_close(pp[0]);
8ac85365 2571 return PerlIO_fdopen(p[This], mode);
a687059c 2572}
7c0587c8 2573#else
55497cff 2574#if defined(atarist) || defined(DJGPP)
7c0587c8 2575FILE *popen();
760ac839 2576PerlIO *
864dbfa3 2577Perl_my_popen(pTHX_ char *cmd, char *mode)
7c0587c8 2578{
45bc9206 2579 PERL_FLUSHALL_FOR_CHILD;
a1d180c4
NIS		 2580 /* Call system's popen() to get a FILE *, then import it.
2581 used 0 for 2nd parameter to PerlIO_importFILE;
2582 apparently not used
2583 */
2584 return PerlIO_importFILE(popen(cmd, mode), 0);
7c0587c8
LW		 2585}
2586#endif
2587
2588#endif /* !DOSISH */
a687059c 2589
748a9306 2590#ifdef DUMP_FDS
35ff7856 2591void
864dbfa3 2592Perl_dump_fds(pTHX_ char *s)
ae986130
LW		 2593{
2594 int fd;
2595 struct stat tmpstatbuf;
2596
bf49b057 2597 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2598 for (fd = 0; fd < 32; fd++) {
6ad3d225 2599 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2600 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2601 }
bf49b057 2602 PerlIO_printf(Perl_debug_log,"\n");
ae986130 2603}
35ff7856 2604#endif /* DUMP_FDS */
ae986130 2605
fe14fcc3 2606#ifndef HAS_DUP2
fec02dd3 2607int
ba106d47 2608dup2(int oldfd, int newfd)
a687059c 2609{
a0d0e21e 2610#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD		 2611 if (oldfd == newfd)
2612 return oldfd;
6ad3d225 2613 PerlLIO_close(newfd);
fec02dd3 2614 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2615#else
fc36a67e 2616#define DUP2_MAX_FDS 256
2617 int fdtmp[DUP2_MAX_FDS];
79072805 2618 I32 fdx = 0;
ae986130
LW		 2619 int fd;
2620
fe14fcc3 2621 if (oldfd == newfd)
fec02dd3 2622 return oldfd;
6ad3d225 2623 PerlLIO_close(newfd);
fc36a67e 2624 /* good enough for low fd's... */
6ad3d225 2625 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2626 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2627 PerlLIO_close(fd);
fc36a67e 2628 fd = -1;
2629 break;
2630 }
ae986130 2631 fdtmp[fdx++] = fd;
fc36a67e 2632 }
ae986130 2633 while (fdx > 0)
6ad3d225 2634 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2635 return fd;
62b28dd9 2636#endif
a687059c
LW		 2637}
2638#endif
2639
64ca3a65 2640#ifndef PERL_MICRO
ff68c719 2641#ifdef HAS_SIGACTION
2642
2643Sighandler_t
864dbfa3 2644Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2645{
2646 struct sigaction act, oact;
2647
2648 act.sa_handler = handler;
2649 sigemptyset(&act.sa_mask);
2650 act.sa_flags = 0;
2651#ifdef SA_RESTART
0a8e0eff 2652#if !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
ff68c719 2653 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2654#endif
0a8e0eff 2655#endif
85264bed
CS		 2656#ifdef SA_NOCLDWAIT
2657 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2658 act.sa_flags |= SA_NOCLDWAIT;
2659#endif
ff68c719 2660 if (sigaction(signo, &act, &oact) == -1)
36477c24 2661 return SIG_ERR;
ff68c719 2662 else
36477c24 2663 return oact.sa_handler;
ff68c719 2664}
2665
2666Sighandler_t
864dbfa3 2667Perl_rsignal_state(pTHX_ int signo)
ff68c719 2668{
2669 struct sigaction oact;
2670
2671 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2672 return SIG_ERR;
2673 else
2674 return oact.sa_handler;
2675}
2676
2677int
864dbfa3 2678Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2679{
2680 struct sigaction act;
2681
2682 act.sa_handler = handler;
2683 sigemptyset(&act.sa_mask);
2684 act.sa_flags = 0;
2685#ifdef SA_RESTART
0a8e0eff 2686#if !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
ff68c719 2687 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2688#endif
0a8e0eff 2689#endif
85264bed
CS		 2690#ifdef SA_NOCLDWAIT
2691 if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
2692 act.sa_flags |= SA_NOCLDWAIT;
2693#endif
ff68c719 2694 return sigaction(signo, &act, save);
2695}
2696
2697int
864dbfa3 2698Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2699{
2700 return sigaction(signo, save, (struct sigaction *)NULL);
2701}
2702
2703#else /* !HAS_SIGACTION */
2704
2705Sighandler_t
864dbfa3 2706Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2707{
6ad3d225 2708 return PerlProc_signal(signo, handler);
ff68c719 2709}
2710
2711static int sig_trapped;
2712
2713static
2714Signal_t
4e35701f 2715sig_trap(int signo)
ff68c719 2716{
2717 sig_trapped++;
2718}
2719
2720Sighandler_t
864dbfa3 2721Perl_rsignal_state(pTHX_ int signo)
ff68c719 2722{
2723 Sighandler_t oldsig;
2724
2725 sig_trapped = 0;
6ad3d225
GS		 2726 oldsig = PerlProc_signal(signo, sig_trap);
2727 PerlProc_signal(signo, oldsig);
ff68c719 2728 if (sig_trapped)
7766f137 2729 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719 2730 return oldsig;
2731}
2732
2733int
864dbfa3 2734Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2735{
6ad3d225 2736 *save = PerlProc_signal(signo, handler);
ff68c719 2737 return (*save == SIG_ERR) ? -1 : 0;
2738}
2739
2740int
864dbfa3 2741Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2742{
6ad3d225 2743 return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
ff68c719 2744}
2745
2746#endif /* !HAS_SIGACTION */
64ca3a65 2747#endif /* !PERL_MICRO */
ff68c719 2748
5f05dabc 2749 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
cd39f2b6 2750#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
79072805 2751I32
864dbfa3 2752Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2753{
ff68c719 2754 Sigsave_t hstat, istat, qstat;
a687059c 2755 int status;
a0d0e21e 2756 SV **svp;
d8a83dd3
JH		 2757 Pid_t pid;
2758 Pid_t pid2;
03136e13 2759 bool close_failed;
b7953727 2760 int saved_errno = 0;
03136e13
CS		 2761#ifdef VMS
2762 int saved_vaxc_errno;
2763#endif
22fae026
TM		 2764#ifdef WIN32
2765 int saved_win32_errno;
2766#endif
a687059c 2767
4755096e 2768 LOCK_FDPID_MUTEX;
3280af22 2769 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
4755096e 2770 UNLOCK_FDPID_MUTEX;
25d92023 2771 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 2772 SvREFCNT_dec(*svp);
3280af22 2773 *svp = &PL_sv_undef;
ddcf38b7
IZ		 2774#ifdef OS2
2775 if (pid == -1) { /* Opened by popen. */
2776 return my_syspclose(ptr);
2777 }
a1d180c4 2778#endif
03136e13
CS		 2779 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2780 saved_errno = errno;
2781#ifdef VMS
2782 saved_vaxc_errno = vaxc$errno;
2783#endif
22fae026
TM		 2784#ifdef WIN32
2785 saved_win32_errno = GetLastError();
2786#endif
03136e13 2787 }
7c0587c8 2788#ifdef UTS
6ad3d225 2789 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
7c0587c8 2790#endif
64ca3a65 2791#ifndef PERL_MICRO
ff68c719 2792 rsignal_save(SIGHUP, SIG_IGN, &hstat);
2793 rsignal_save(SIGINT, SIG_IGN, &istat);
2794 rsignal_save(SIGQUIT, SIG_IGN, &qstat);
64ca3a65 2795#endif
748a9306 2796 do {
1d3434b8
GS		 2797 pid2 = wait4pid(pid, &status, 0);
2798 } while (pid2 == -1 && errno == EINTR);
64ca3a65 2799#ifndef PERL_MICRO
ff68c719 2800 rsignal_restore(SIGHUP, &hstat);
2801 rsignal_restore(SIGINT, &istat);
2802 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 2803#endif
03136e13
CS		 2804 if (close_failed) {
2805 SETERRNO(saved_errno, saved_vaxc_errno);
2806 return -1;
2807 }
1d3434b8 2808 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
20188a90 2809}
4633a7c4
LW		 2810#endif /* !DOSISH */
2811
cd39f2b6 2812#if (!defined(DOSISH) || defined(OS2) || defined(WIN32)) && !defined(MACOS_TRADITIONAL)
79072805 2813I32
d8a83dd3 2814Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 2815{
b7953727
JH		 2816 if (!pid)
2817 return -1;
2818#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2819 {
79072805
LW		 2820 SV *sv;
2821 SV** svp;
fc36a67e 2822 char spid[TYPE_CHARS(int)];
20188a90 2823
20188a90 2824 if (pid > 0) {
7b0972df 2825 sprintf(spid, "%"IVdf, (IV)pid);
3280af22
NIS		 2826 svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
2827 if (svp && *svp != &PL_sv_undef) {
463ee0b2 2828 *statusp = SvIVX(*svp);
3280af22 2829 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2830 return pid;
2831 }
2832 }
2833 else {
79072805 2834 HE *entry;
20188a90 2835
3280af22 2836 hv_iterinit(PL_pidstatus);
155aba94 2837 if ((entry = hv_iternext(PL_pidstatus))) {
a0d0e21e 2838 pid = atoi(hv_iterkey(entry,(I32*)statusp));
3280af22 2839 sv = hv_iterval(PL_pidstatus,entry);
463ee0b2 2840 *statusp = SvIVX(sv);
7b0972df 2841 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2842 (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
20188a90
LW		 2843 return pid;
2844 }
b7953727 2845 }
20188a90 2846 }
68a29c53 2847#endif
79072805 2848#ifdef HAS_WAITPID
367f3c24
IZ		 2849# ifdef HAS_WAITPID_RUNTIME
2850 if (!HAS_WAITPID_RUNTIME)
2851 goto hard_way;
2852# endif
f55ee38a 2853 return PerlProc_waitpid(pid,statusp,flags);
367f3c24
IZ		 2854#endif
2855#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
a0d0e21e 2856 return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
367f3c24
IZ		 2857#endif
2858#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
2859 hard_way:
a0d0e21e
LW		 2860 {
2861 I32 result;
2862 if (flags)
cea2e8a9 2863 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 2864 else {
76e3520e 2865 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW		 2866 pidgone(result,*statusp);
2867 if (result < 0)
2868 *statusp = -1;
2869 }
2870 return result;
a687059c
LW		 2871 }
2872#endif
a687059c 2873}
2d7a9237 2874#endif /* !DOSISH || OS2 || WIN32 */
a687059c 2875
7c0587c8 2876void
de3bb511 2877/*SUPPRESS 590*/
d8a83dd3 2878Perl_pidgone(pTHX_ Pid_t pid, int status)
a687059c 2879{
79072805 2880 register SV *sv;
fc36a67e 2881 char spid[TYPE_CHARS(int)];
a687059c 2882
7b0972df 2883 sprintf(spid, "%"IVdf, (IV)pid);
3280af22 2884 sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
a0d0e21e 2885 (void)SvUPGRADE(sv,SVt_IV);
463ee0b2 2886 SvIVX(sv) = status;
20188a90 2887 return;
a687059c
LW		 2888}
2889
55497cff 2890#if defined(atarist) || defined(OS2) || defined(DJGPP)
7c0587c8 2891int pclose();
ddcf38b7
IZ		 2892#ifdef HAS_FORK
2893int /* Cannot prototype with I32
2894 in os2ish.h. */
ba106d47 2895my_syspclose(PerlIO *ptr)
ddcf38b7 2896#else
79072805 2897I32
864dbfa3 2898Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 2899#endif
a687059c 2900{
760ac839
LW		 2901 /* Needs work for PerlIO ! */
2902 FILE *f = PerlIO_findFILE(ptr);
2903 I32 result = pclose(f);
933fea7f
GS		 2904#if defined(DJGPP)
2905 result = (result << 8) & 0xff00;
2906#endif
760ac839
LW		 2907 PerlIO_releaseFILE(ptr,f);
2908 return result;
a687059c 2909}
7c0587c8 2910#endif
9f68db38
LW		 2911
2912void
864dbfa3 2913Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
9f68db38 2914{
79072805 2915 register I32 todo;
08105a92 2916 register const char *frombase = from;
9f68db38
LW		 2917
2918 if (len == 1) {
08105a92 2919 register const char c = *from;
9f68db38 2920 while (count-- > 0)
5926133d 2921 *to++ = c;
9f68db38
LW		 2922 return;
2923 }
2924 while (count-- > 0) {
2925 for (todo = len; todo > 0; todo--) {
2926 *to++ = *from++;
2927 }
2928 from = frombase;
2929 }
2930}
0f85fab0 2931
463ee0b2 2932U32
65202027 2933Perl_cast_ulong(pTHX_ NV f)
0f85fab0 2934{
3bb7c1b4
JH		 2935 if (f < 0.0)
2936 return f < I32_MIN ? (U32) I32_MIN : (U32)(I32) f;
2937 if (f < U32_MAX_P1) {
27e2fb84 2938#if CASTFLAGS & 2
3bb7c1b4
JH		 2939 if (f < U32_MAX_P1_HALF)
2940 return (U32) f;
2941 f -= U32_MAX_P1_HALF;
2942 return ((U32) f) | (1 + U32_MAX >> 1);
2943#else
2944 return (U32) f;
5d94fbed 2945#endif
3bb7c1b4
JH		 2946 }
2947 return f > 0 ? U32_MAX : 0 /* NaN */;
2948}
5d94fbed 2949
ed6116ce 2950I32
65202027 2951Perl_cast_i32(pTHX_ NV f)
ed6116ce 2952{
3bb7c1b4
JH		 2953 if (f < I32_MAX_P1)
2954 return f < I32_MIN ? I32_MIN : (I32) f;
2955 if (f < U32_MAX_P1) {
2956#if CASTFLAGS & 2
2957 if (f < U32_MAX_P1_HALF)
2958 return (I32)(U32) f;
2959 f -= U32_MAX_P1_HALF;
2960 return (I32)(((U32) f) | (1 + U32_MAX >> 1));
2961#else
2962 return (I32)(U32) f;
2963#endif
2964 }
2965 return f > 0 ? (I32)U32_MAX : 0 /* NaN */;
ed6116ce 2966}
a0d0e21e
LW		 2967
2968IV
65202027 2969Perl_cast_iv(pTHX_ NV f)
a0d0e21e 2970{
3bb7c1b4
JH		 2971 if (f < IV_MAX_P1)
2972 return f < IV_MIN ? IV_MIN : (IV) f;
2973 if (f < UV_MAX_P1) {
2974#if CASTFLAGS & 2
2975 /* For future flexibility allowing for sizeof(UV) >= sizeof(IV) */
2976 if (f < UV_MAX_P1_HALF)
2977 return (IV)(UV) f;
2978 f -= UV_MAX_P1_HALF;
2979 return (IV)(((UV) f) | (1 + UV_MAX >> 1));
2980#else
2981 return (IV)(UV) f;
2982#endif
2983 }
2984 return f > 0 ? (IV)UV_MAX : 0 /* NaN */;
a0d0e21e 2985}
5d94fbed
AD		 2986
2987UV
65202027 2988Perl_cast_uv(pTHX_ NV f)
5d94fbed 2989{
3bb7c1b4
JH		 2990 if (f < 0.0)
2991 return f < IV_MIN ? (UV) IV_MIN : (UV)(IV) f;
2992 if (f < UV_MAX_P1) {
2993#if CASTFLAGS & 2
2994 if (f < UV_MAX_P1_HALF)
2995 return (UV) f;
2996 f -= UV_MAX_P1_HALF;
2997 return ((UV) f) | (1 + UV_MAX >> 1);
2998#else
5d94fbed 2999 return (UV) f;
3bb7c1b4
JH		 3000#endif
3001 }
3002 return f > 0 ? UV_MAX : 0 /* NaN */;
5d94fbed
AD		 3003}
3004
fe14fcc3 3005#ifndef HAS_RENAME
79072805 3006I32
864dbfa3 3007Perl_same_dirent(pTHX_ char *a, char *b)
62b28dd9 3008{
93a17b20
LW		 3009 char *fa = strrchr(a,'/');
3010 char *fb = strrchr(b,'/');
62b28dd9
LW		 3011 struct stat tmpstatbuf1;
3012 struct stat tmpstatbuf2;
46fc3d4c 3013 SV *tmpsv = sv_newmortal();
62b28dd9
LW		 3014
3015 if (fa)
3016 fa++;
3017 else
3018 fa = a;
3019 if (fb)
3020 fb++;
3021 else
3022 fb = b;
3023 if (strNE(a,b))
3024 return FALSE;
3025 if (fa == a)
46fc3d4c 3026 sv_setpv(tmpsv, ".");
62b28dd9 3027 else
46fc3d4c 3028 sv_setpvn(tmpsv, a, fa - a);
c6ed36e1 3029 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW		 3030 return FALSE;
3031 if (fb == b)
46fc3d4c 3032 sv_setpv(tmpsv, ".");
62b28dd9 3033 else
46fc3d4c 3034 sv_setpvn(tmpsv, b, fb - b);
c6ed36e1 3035 if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW		 3036 return FALSE;
3037 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3038 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3039}
fe14fcc3
LW		 3040#endif /* !HAS_RENAME */
3041
9e24b6e2 3042NV
ba210ebe 3043Perl_scan_bin(pTHX_ char *start, STRLEN len, STRLEN *retlen)
4f19785b
WSI		 3044{
3045 register char *s = start;
9e24b6e2
JH		 3046 register NV rnv = 0.0;
3047 register UV ruv = 0;
252aa082 3048 register bool seenb = FALSE;
9e24b6e2 3049 register bool overflowed = FALSE;
252aa082
JH		 3050
3051 for (; len-- && *s; s++) {
3052 if (!(*s == '0' || *s == '1')) {
b21ed0a9
GS		 3053 if (*s == '_' && len && *retlen
3054 && (s[1] == '0' || s[1] == '1'))
3055 {
3056 --len;
3057 ++s;
3058 }
3059 else if (seenb == FALSE && *s == 'b' && ruv == 0) {
252aa082
JH		 3060 /* Disallow 0bbb0b0bbb... */
3061 seenb = TRUE;
252aa082
JH		 3062 continue;
3063 }
3064 else {
627300f0
JH		 3065 if (ckWARN(WARN_DIGIT))
3066 Perl_warner(aTHX_ WARN_DIGIT,
252aa082
JH		 3067 "Illegal binary digit '%c' ignored", *s);
3068 break;
3069 }
9e24b6e2
JH		 3070 }
3071 if (!overflowed) {
3072 register UV xuv = ruv << 1;
3073
3074 if ((xuv >> 1) != ruv) {
9e24b6e2
JH		 3075 overflowed = TRUE;
3076 rnv = (NV) ruv;
627300f0
JH		 3077 if (ckWARN_d(WARN_OVERFLOW))
3078 Perl_warner(aTHX_ WARN_OVERFLOW,
9e24b6e2 3079 "Integer overflow in binary number");
b21ed0a9
GS		 3080 }
3081 else
9e24b6e2
JH		 3082 ruv = xuv | (*s - '0');
3083 }
3084 if (overflowed) {
3085 rnv *= 2;
3086 /* If an NV has not enough bits in its mantissa to
3087 * represent an UV this summing of small low-order numbers
3088 * is a waste of time (because the NV cannot preserve
3089 * the low-order bits anyway): we could just remember when
3090 * did we overflow and in the end just multiply rnv by the
2cc4c2dc 3091 * right amount. */
9e24b6e2 3092 rnv += (*s - '0');
f248d071 3093 }
4f19785b 3094 }
9e24b6e2
JH		 3095 if (!overflowed)
3096 rnv = (NV) ruv;
893fe2c2 3097 if ( ( overflowed && rnv > 4294967295.0)
15041a67 3098#if UVSIZE > 4
893fe2c2
JH		 3099 || (!overflowed && ruv > 0xffffffff )
3100#endif
a1d180c4 3101 ) {
627300f0
JH		 3102 if (ckWARN(WARN_PORTABLE))
3103 Perl_warner(aTHX_ WARN_PORTABLE,
252aa082 3104 "Binary number > 0b11111111111111111111111111111111 non-portable");
4f19785b
WSI		 3105 }
3106 *retlen = s - start;
9e24b6e2 3107 return rnv;
4f19785b 3108}
9e24b6e2
JH		 3109
3110NV
ba210ebe 3111Perl_scan_oct(pTHX_ char *start, STRLEN len, STRLEN *retlen)
fe14fcc3
LW		 3112{
3113 register char *s = start;
9e24b6e2
JH		 3114 register NV rnv = 0.0;
3115 register UV ruv = 0;
3116 register bool overflowed = FALSE;
252aa082
JH		 3117
3118 for (; len-- && *s; s++) {
3119 if (!(*s >= '0' && *s <= '7')) {
b21ed0a9
GS		 3120 if (*s == '_' && len && *retlen
3121 && (s[1] >= '0' && s[1] <= '7'))
3122 {
3123 --len;
3124 ++s;
3125 }
252aa082 3126 else {
f84f607d
JH		 3127 /* Allow \octal to work the DWIM way (that is, stop scanning
3128 * as soon as non-octal characters are seen, complain only iff
3129 * someone seems to want to use the digits eight and nine). */
252aa082 3130 if (*s == '8' || *s == '9') {
627300f0
JH		 3131 if (ckWARN(WARN_DIGIT))
3132 Perl_warner(aTHX_ WARN_DIGIT,
252aa082
JH		 3133 "Illegal octal digit '%c' ignored", *s);
3134 }
3135 break;
3136 }
55497cff 3137 }
9e24b6e2 3138 if (!overflowed) {
893fe2c2 3139 register UV xuv = ruv << 3;
9e24b6e2
JH		 3140
3141 if ((xuv >> 3) != ruv) {
9e24b6e2
JH		 3142 overflowed = TRUE;
3143 rnv = (NV) ruv;
627300f0
JH		 3144 if (ckWARN_d(WARN_OVERFLOW))
3145 Perl_warner(aTHX_ WARN_OVERFLOW,
9e24b6e2 3146 "Integer overflow in octal number");
b21ed0a9
GS		 3147 }
3148 else
9e24b6e2
JH		 3149 ruv = xuv | (*s - '0');
3150 }
3151 if (overflowed) {
3152 rnv *= 8.0;
3153 /* If an NV has not enough bits in its mantissa to
3154 * represent an UV this summing of small low-order numbers
3155 * is a waste of time (because the NV cannot preserve
3156 * the low-order bits anyway): we could just remember when
3157 * did we overflow and in the end just multiply rnv by the
3158 * right amount of 8-tuples. */
3159 rnv += (NV)(*s - '0');
3160 }
fe14fcc3 3161 }
9e24b6e2
JH		 3162 if (!overflowed)
3163 rnv = (NV) ruv;
893fe2c2 3164 if ( ( overflowed && rnv > 4294967295.0)
15041a67 3165#if UVSIZE > 4
893fe2c2
JH		 3166 || (!overflowed && ruv > 0xffffffff )
3167#endif
3168 ) {
627300f0
JH		 3169 if (ckWARN(WARN_PORTABLE))
3170 Perl_warner(aTHX_ WARN_PORTABLE,
252aa082 3171 "Octal number > 037777777777 non-portable");
d008e5eb 3172 }
fe14fcc3 3173 *retlen = s - start;
9e24b6e2 3174 return rnv;
fe14fcc3
LW		 3175}
3176
9e24b6e2 3177NV
ba210ebe 3178Perl_scan_hex(pTHX_ char *start, STRLEN len, STRLEN *retlen)
fe14fcc3
LW		 3179{
3180 register char *s = start;
9e24b6e2
JH		 3181 register NV rnv = 0.0;
3182 register UV ruv = 0;
9e24b6e2 3183 register bool overflowed = FALSE;
9e24b6e2 3184 char *hexdigit;
fe14fcc3 3185
cfd3e6cc
JH		 3186 if (len > 2) {
3187 if (s[0] == 'x') {
3188 s++;
3189 len--;
3190 }
3191 else if (len > 3 && s[0] == '0' && s[1] == 'x') {
3192 s+=2;
3193 len-=2;
3194 }
3195 }
3196
9e24b6e2
JH		 3197 for (; len-- && *s; s++) {
3198 hexdigit = strchr((char *) PL_hexdigit, *s);
3199 if (!hexdigit) {
b21ed0a9
GS		 3200 if (*s == '_' && len && *retlen && s[1]
3201 && (hexdigit = strchr((char *) PL_hexdigit, s[1])))
3202 {
3203 --len;
3204 ++s;
3205 }
a0ed51b3 3206 else {
627300f0
JH		 3207 if (ckWARN(WARN_DIGIT))
3208 Perl_warner(aTHX_ WARN_DIGIT,
252aa082 3209 "Illegal hexadecimal digit '%c' ignored", *s);
a0ed51b3
LW		 3210 break;
3211 }
3212 }
9e24b6e2
JH		 3213 if (!overflowed) {
3214 register UV xuv = ruv << 4;
3215
3216 if ((xuv >> 4) != ruv) {
9e24b6e2
JH		 3217 overflowed = TRUE;
3218 rnv = (NV) ruv;
627300f0
JH		 3219 if (ckWARN_d(WARN_OVERFLOW))
3220 Perl_warner(aTHX_ WARN_OVERFLOW,
9e24b6e2 3221 "Integer overflow in hexadecimal number");
b21ed0a9
GS		 3222 }
3223 else
9e24b6e2
JH		 3224 ruv = xuv | ((hexdigit - PL_hexdigit) & 15);
3225 }
3226 if (overflowed) {
3227 rnv *= 16.0;
3228 /* If an NV has not enough bits in its mantissa to
3229 * represent an UV this summing of small low-order numbers
3230 * is a waste of time (because the NV cannot preserve
3231 * the low-order bits anyway): we could just remember when
3232 * did we overflow and in the end just multiply rnv by the
3233 * right amount of 16-tuples. */
3234 rnv += (NV)((hexdigit - PL_hexdigit) & 15);
3235 }
6ff81951 3236 }
9e24b6e2
JH		 3237 if (!overflowed)
3238 rnv = (NV) ruv;
893fe2c2 3239 if ( ( overflowed && rnv > 4294967295.0)
15041a67 3240#if UVSIZE > 4
893fe2c2
JH		 3241 || (!overflowed && ruv > 0xffffffff )
3242#endif
a1d180c4 3243 ) {
627300f0
JH		 3244 if (ckWARN(WARN_PORTABLE))
3245 Perl_warner(aTHX_ WARN_PORTABLE,
252aa082
JH		 3246 "Hexadecimal number > 0xffffffff non-portable");
3247 }
fe14fcc3 3248 *retlen = s - start;
9e24b6e2 3249 return rnv;
fe14fcc3 3250}
760ac839 3251
491527d0 3252char*
864dbfa3 3253Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
491527d0 3254{
491527d0
GS		 3255 char *xfound = Nullch;
3256 char *xfailed = Nullch;
0f31cffe 3257 char tmpbuf[MAXPATHLEN];
491527d0
GS		 3258 register char *s;
3259 I32 len;
3260 int retval;
3261#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3262# define SEARCH_EXTS ".bat", ".cmd", NULL
3263# define MAX_EXT_LEN 4
3264#endif
3265#ifdef OS2
3266# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3267# define MAX_EXT_LEN 4
3268#endif
3269#ifdef VMS
3270# define SEARCH_EXTS ".pl", ".com", NULL
3271# define MAX_EXT_LEN 4
3272#endif
3273 /* additional extensions to try in each dir if scriptname not found */
3274#ifdef SEARCH_EXTS
3275 char *exts[] = { SEARCH_EXTS };
3276 char **ext = search_ext ? search_ext : exts;
3277 int extidx = 0, i = 0;
3278 char *curext = Nullch;
3279#else
3280# define MAX_EXT_LEN 0
3281#endif
3282
3283 /*
3284 * If dosearch is true and if scriptname does not contain path
3285 * delimiters, search the PATH for scriptname.
3286 *
3287 * If SEARCH_EXTS is also defined, will look for each
3288 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3289 * while searching the PATH.
3290 *
3291 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3292 * proceeds as follows:
3293 * If DOSISH or VMSISH:
3294 * + look for ./scriptname{,.foo,.bar}
3295 * + search the PATH for scriptname{,.foo,.bar}
3296 *
3297 * If !DOSISH:
3298 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3299 * this will not look in '.' if it's not in the PATH)
3300 */
84486fc6 3301 tmpbuf[0] = '\0';
491527d0
GS		 3302
3303#ifdef VMS
3304# ifdef ALWAYS_DEFTYPES
3305 len = strlen(scriptname);
3306 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3307 int hasdir, idx = 0, deftypes = 1;
3308 bool seen_dot = 1;
3309
3310 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
3311# else
3312 if (dosearch) {
3313 int hasdir, idx = 0, deftypes = 1;
3314 bool seen_dot = 1;
3315
3316 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
3317# endif
3318 /* The first time through, just add SEARCH_EXTS to whatever we
3319 * already have, so we can check for default file types. */
3320 while (deftypes ||
84486fc6 3321 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS		 3322 {
3323 if (deftypes) {
3324 deftypes = 0;
84486fc6 3325 *tmpbuf = '\0';
491527d0 3326 }
84486fc6
GS		 3327 if ((strlen(tmpbuf) + strlen(scriptname)
3328 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3329 continue; /* don't search dir with too-long name */
84486fc6 3330 strcat(tmpbuf, scriptname);
491527d0
GS		 3331#else /* !VMS */
3332
3333#ifdef DOSISH
3334 if (strEQ(scriptname, "-"))
3335 dosearch = 0;
3336 if (dosearch) { /* Look in '.' first. */
3337 char *cur = scriptname;
3338#ifdef SEARCH_EXTS
3339 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3340 while (ext[i])
3341 if (strEQ(ext[i++],curext)) {
3342 extidx = -1; /* already has an ext */
3343 break;
3344 }
3345 do {
3346#endif
3347 DEBUG_p(PerlIO_printf(Perl_debug_log,
3348 "Looking for %s\n",cur));
017f25f1
IZ		 3349 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3350 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS		 3351 dosearch = 0;
3352 scriptname = cur;
3353#ifdef SEARCH_EXTS
3354 break;
3355#endif
3356 }
3357#ifdef SEARCH_EXTS
3358 if (cur == scriptname) {
3359 len = strlen(scriptname);
84486fc6 3360 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3361 break;
84486fc6 3362 cur = strcpy(tmpbuf, scriptname);
491527d0
GS		 3363 }
3364 } while (extidx >= 0 && ext[extidx] /* try an extension? */
84486fc6 3365 && strcpy(tmpbuf+len, ext[extidx++]));
491527d0
GS		 3366#endif
3367 }
3368#endif
3369
cd39f2b6
JH		 3370#ifdef MACOS_TRADITIONAL
3371 if (dosearch && !strchr(scriptname, ':') &&
3372 (s = PerlEnv_getenv("Commands")))
3373#else
491527d0
GS		 3374 if (dosearch && !strchr(scriptname, '/')
3375#ifdef DOSISH
3376 && !strchr(scriptname, '\\')
3377#endif
cd39f2b6
JH		 3378 && (s = PerlEnv_getenv("PATH")))
3379#endif
3380 {
491527d0
GS		 3381 bool seen_dot = 0;
3382
3280af22
NIS		 3383 PL_bufend = s + strlen(s);
3384 while (s < PL_bufend) {
cd39f2b6
JH		 3385#ifdef MACOS_TRADITIONAL
3386 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
3387 ',',
3388 &len);
3389#else
491527d0
GS		 3390#if defined(atarist) || defined(DOSISH)
3391 for (len = 0; *s
3392# ifdef atarist
3393 && *s != ','
3394# endif
3395 && *s != ';'; len++, s++) {
84486fc6
GS		 3396 if (len < sizeof tmpbuf)
3397 tmpbuf[len] = *s;
491527d0 3398 }
84486fc6
GS		 3399 if (len < sizeof tmpbuf)
3400 tmpbuf[len] = '\0';
491527d0 3401#else /* ! (atarist || DOSISH) */
3280af22 3402 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
491527d0
GS		 3403 ':',
3404 &len);
3405#endif /* ! (atarist || DOSISH) */
cd39f2b6 3406#endif /* MACOS_TRADITIONAL */
3280af22 3407 if (s < PL_bufend)
491527d0 3408 s++;
84486fc6 3409 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0 3410 continue; /* don't search dir with too-long name */
cd39f2b6
JH		 3411#ifdef MACOS_TRADITIONAL
3412 if (len && tmpbuf[len - 1] != ':')
3413 tmpbuf[len++] = ':';
3414#else
491527d0 3415 if (len
61ae2fbf 3416#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
84486fc6
GS		 3417 && tmpbuf[len - 1] != '/'
3418 && tmpbuf[len - 1] != '\\'
491527d0
GS		 3419#endif
3420 )
84486fc6
GS		 3421 tmpbuf[len++] = '/';
3422 if (len == 2 && tmpbuf[0] == '.')
491527d0 3423 seen_dot = 1;
cd39f2b6 3424#endif
84486fc6 3425 (void)strcpy(tmpbuf + len, scriptname);
491527d0
GS		 3426#endif /* !VMS */
3427
3428#ifdef SEARCH_EXTS
84486fc6 3429 len = strlen(tmpbuf);
491527d0
GS		 3430 if (extidx > 0) /* reset after previous loop */
3431 extidx = 0;
3432 do {
3433#endif
84486fc6 3434 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3435 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ		 3436 if (S_ISDIR(PL_statbuf.st_mode)) {
3437 retval = -1;
3438 }
491527d0
GS		 3439#ifdef SEARCH_EXTS
3440 } while ( retval < 0 /* not there */
3441 && extidx>=0 && ext[extidx] /* try an extension? */
84486fc6 3442 && strcpy(tmpbuf+len, ext[extidx++])
491527d0
GS		 3443 );
3444#endif
3445 if (retval < 0)
3446 continue;
3280af22
NIS		 3447 if (S_ISREG(PL_statbuf.st_mode)
3448 && cando(S_IRUSR,TRUE,&PL_statbuf)
73811745 3449#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3280af22 3450 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS		 3451#endif
3452 )
3453 {
84486fc6 3454 xfound = tmpbuf; /* bingo! */
491527d0
GS		 3455 break;
3456 }
3457 if (!xfailed)
84486fc6 3458 xfailed = savepv(tmpbuf);
491527d0
GS		 3459 }
3460#ifndef DOSISH
017f25f1 3461 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3462 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3463 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS		 3464#endif
3465 seen_dot = 1; /* Disable message. */
9ccb31f9
GS		 3466 if (!xfound) {
3467 if (flags & 1) { /* do or die? */
cea2e8a9 3468 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS		 3469 (xfailed ? "execute" : "find"),
3470 (xfailed ? xfailed : scriptname),
3471 (xfailed ? "" : " on PATH"),
3472 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3473 }
3474 scriptname = Nullch;
3475 }
491527d0
GS		 3476 if (xfailed)
3477 Safefree(xfailed);
3478 scriptname = xfound;
3479 }
9ccb31f9 3480 return (scriptname ? savepv(scriptname) : Nullch);
491527d0
GS		 3481}
3482
ba869deb
GS		 3483#ifndef PERL_GET_CONTEXT_DEFINED
3484
3485void *
3486Perl_get_context(void)
3487{
3488#if defined(USE_THREADS) || defined(USE_ITHREADS)
3489# ifdef OLD_PTHREADS_API
3490 pthread_addr_t t;
3491 if (pthread_getspecific(PL_thr_key, &t))
3492 Perl_croak_nocontext("panic: pthread_getspecific");
3493 return (void*)t;
3494# else
bce813aa 3495# ifdef I_MACH_CTHREADS
8b8b35ab 3496 return (void*)cthread_data(cthread_self());
bce813aa 3497# else
8b8b35ab
JH		 3498 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3499# endif
c44d3fdb 3500# endif
ba869deb
GS		 3501#else
3502 return (void*)NULL;
3503#endif
3504}
3505
3506void
3507Perl_set_context(void *t)
3508{
3509#if defined(USE_THREADS) || defined(USE_ITHREADS)
c44d3fdb
GS		 3510# ifdef I_MACH_CTHREADS
3511 cthread_set_data(cthread_self(), t);
3512# else
ba869deb
GS		 3513 if (pthread_setspecific(PL_thr_key, t))
3514 Perl_croak_nocontext("panic: pthread_setspecific");
c44d3fdb 3515# endif
ba869deb
GS		 3516#endif
3517}
3518
3519#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3520
11343788 3521#ifdef USE_THREADS
ba869deb 3522
12ca11f6
MB		 3523#ifdef FAKE_THREADS
3524/* Very simplistic scheduler for now */
3525void
3526schedule(void)
3527{
c7848ba1 3528 thr = thr->i.next_run;
12ca11f6
MB		 3529}
3530
3531void
864dbfa3 3532Perl_cond_init(pTHX_ perl_cond *cp)
12ca11f6
MB		 3533{
3534 *cp = 0;
3535}
3536
3537void
864dbfa3 3538Perl_cond_signal(pTHX_ perl_cond *cp)
12ca11f6 3539{
51dd5992 3540 perl_os_thread t;
12ca11f6 3541 perl_cond cond = *cp;
a1d180c4 3542
12ca11f6
MB		 3543 if (!cond)
3544 return;
3545 t = cond->thread;
3546 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3547 t->i.next_run = thr->i.next_run;
3548 thr->i.next_run->i.prev_run = t;
3549 t->i.prev_run = thr;
3550 thr->i.next_run = t;
3551 thr->i.wait_queue = 0;
12ca11f6
MB		 3552 /* Remove from the wait queue */
3553 *cp = cond->next;
3554 Safefree(cond);
3555}
3556
3557void
864dbfa3 3558Perl_cond_broadcast(pTHX_ perl_cond *cp)
12ca11f6 3559{
51dd5992 3560 perl_os_thread t;
12ca11f6 3561 perl_cond cond, cond_next;
a1d180c4 3562
12ca11f6
MB		 3563 for (cond = *cp; cond; cond = cond_next) {
3564 t = cond->thread;
3565 /* Insert t in the runnable queue just ahead of us */
c7848ba1
MB		 3566 t->i.next_run = thr->i.next_run;
3567 thr->i.next_run->i.prev_run = t;
3568 t->i.prev_run = thr;
3569 thr->i.next_run = t;
3570 thr->i.wait_queue = 0;
12ca11f6
MB		 3571 /* Remove from the wait queue */
3572 cond_next = cond->next;
3573 Safefree(cond);
3574 }
3575 *cp = 0;
3576}
3577
3578void
864dbfa3 3579Perl_cond_wait(pTHX_ perl_cond *cp)
12ca11f6
MB		 3580{
3581 perl_cond cond;
3582
c7848ba1 3583 if (thr->i.next_run == thr)
cea2e8a9 3584 Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
a1d180c4 3585
0f15f207 3586 New(666, cond, 1, struct perl_wait_queue);
12ca11f6
MB		 3587 cond->thread = thr;
3588 cond->next = *cp;
3589 *cp = cond;
c7848ba1 3590 thr->i.wait_queue = cond;
12ca11f6 3591 /* Remove ourselves from runnable queue */
c7848ba1
MB		 3592 thr->i.next_run->i.prev_run = thr->i.prev_run;
3593 thr->i.prev_run->i.next_run = thr->i.next_run;
12ca11f6
MB		 3594}
3595#endif /* FAKE_THREADS */
3596
f93b4edd 3597MAGIC *
864dbfa3 3598Perl_condpair_magic(pTHX_ SV *sv)
f93b4edd
MB		 3599{
3600 MAGIC *mg;
a1d180c4 3601
f93b4edd 3602 SvUPGRADE(sv, SVt_PVMG);
14befaf4 3603 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB		 3604 if (!mg) {
3605 condpair_t *cp;
3606
3607 New(53, cp, 1, condpair_t);
3608 MUTEX_INIT(&cp->mutex);
3609 COND_INIT(&cp->owner_cond);
3610 COND_INIT(&cp->cond);
3611 cp->owner = 0;
1feb2720 3612 LOCK_CRED_MUTEX; /* XXX need separate mutex? */
14befaf4 3613 mg = mg_find(sv, PERL_MAGIC_mutex);
f93b4edd
MB		 3614 if (mg) {
3615 /* someone else beat us to initialising it */
1feb2720 3616 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
f93b4edd
MB		 3617 MUTEX_DESTROY(&cp->mutex);
3618 COND_DESTROY(&cp->owner_cond);
3619 COND_DESTROY(&cp->cond);
3620 Safefree(cp);
3621 }
3622 else {
14befaf4 3623 sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0);
f93b4edd
MB		 3624 mg = SvMAGIC(sv);
3625 mg->mg_ptr = (char *)cp;
565764a8 3626 mg->mg_len = sizeof(cp);
1feb2720 3627 UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
bf49b057 3628 DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log,
c7848ba1 3629 "%p: condpair_magic %p\n", thr, sv));)
f93b4edd
MB		 3630 }
3631 }
3632 return mg;
3633}
a863c7d1 3634
3d35f11b 3635SV *
4755096e 3636Perl_sv_lock(pTHX_ SV *osv)
3d35f11b
GS		 3637{
3638 MAGIC *mg;
3639 SV *sv = osv;
3640
631cfb58 3641 LOCK_SV_LOCK_MUTEX;
3d35f11b
GS		 3642 if (SvROK(sv)) {
3643 sv = SvRV(sv);
3d35f11b
GS		 3644 }
3645
3646 mg = condpair_magic(sv);
3647 MUTEX_LOCK(MgMUTEXP(mg));
3648 if (MgOWNER(mg) == thr)
3649 MUTEX_UNLOCK(MgMUTEXP(mg));
4755096e 3650 else {
3d35f11b
GS		 3651 while (MgOWNER(mg))
3652 COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
3653 MgOWNER(mg) = thr;
4755096e
GS		 3654 DEBUG_S(PerlIO_printf(Perl_debug_log,
3655 "0x%"UVxf": Perl_lock lock 0x%"UVxf"\n",
3d35f11b
GS		 3656 PTR2UV(thr), PTR2UV(sv));)
3657 MUTEX_UNLOCK(MgMUTEXP(mg));
3658 SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
3659 }
631cfb58 3660 UNLOCK_SV_LOCK_MUTEX;
4755096e 3661 return sv;
3d35f11b
GS		 3662}
3663
a863c7d1 3664/*
199100c8
MB		 3665 * Make a new perl thread structure using t as a prototype. Some of the
3666 * fields for the new thread are copied from the prototype thread, t,
3667 * so t should not be running in perl at the time this function is
3668 * called. The use by ext/Thread/Thread.xs in core perl (where t is the
3669 * thread calling new_struct_thread) clearly satisfies this constraint.
a863c7d1 3670 */
52e1cb5e 3671struct perl_thread *
864dbfa3 3672Perl_new_struct_thread(pTHX_ struct perl_thread *t)
a863c7d1 3673{
c5be433b 3674#if !defined(PERL_IMPLICIT_CONTEXT)
52e1cb5e 3675 struct perl_thread *thr;
cea2e8a9 3676#endif
a863c7d1 3677 SV *sv;
199100c8
MB		 3678 SV **svp;
3679 I32 i;
3680
79cb57f6 3681 sv = newSVpvn("", 0);
52e1cb5e
JH		 3682 SvGROW(sv, sizeof(struct perl_thread) + 1);
3683 SvCUR_set(sv, sizeof(struct perl_thread));
199100c8 3684 thr = (Thread) SvPVX(sv);
949ced2d 3685#ifdef DEBUGGING
52e1cb5e 3686 memset(thr, 0xab, sizeof(struct perl_thread));
533c011a
NIS		 3687 PL_markstack = 0;
3688 PL_scopestack = 0;
3689 PL_savestack = 0;
3690 PL_retstack = 0;
3691 PL_dirty = 0;
3692 PL_localizing = 0;
949ced2d 3693 Zero(&PL_hv_fetch_ent_mh, 1, HE);
d0e9ca0c
HS		 3694 PL_efloatbuf = (char*)NULL;
3695 PL_efloatsize = 0;
949ced2d
GS		 3696#else
3697 Zero(thr, 1, struct perl_thread);
3698#endif
199100c8
MB		 3699
3700 thr->oursv = sv;
cea2e8a9 3701 init_stacks();
a863c7d1 3702
533c011a 3703 PL_curcop = &PL_compiling;
c5be433b 3704 thr->interp = t->interp;
199100c8 3705 thr->cvcache = newHV();
54b9620d 3706 thr->threadsv = newAV();
a863c7d1 3707 thr->specific = newAV();
79cb57f6 3708 thr->errsv = newSVpvn("", 0);
a863c7d1 3709 thr->flags = THRf_R_JOINABLE;
8dcd6f7b 3710 thr->thr_done = 0;
a863c7d1 3711 MUTEX_INIT(&thr->mutex);
199100c8 3712
5c831c24 3713 JMPENV_BOOTSTRAP;
533c011a 3714
6dc8a9e4 3715 PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */
533c011a
NIS		 3716 PL_restartop = 0;
3717
b099ddc0 3718 PL_statname = NEWSV(66,0);
5a844595 3719 PL_errors = newSVpvn("", 0);
b099ddc0 3720 PL_maxscream = -1;
0b94c7bb
GS		 3721 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
3722 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
3723 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
3724 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
3725 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
b099ddc0
GS		 3726 PL_regindent = 0;
3727 PL_reginterp_cnt = 0;
3728 PL_lastscream = Nullsv;
3729 PL_screamfirst = 0;
3730 PL_screamnext = 0;
3731 PL_reg_start_tmp = 0;
3732 PL_reg_start_tmpl = 0;
14ed4b74 3733 PL_reg_poscache = Nullch;
b099ddc0
GS		 3734
3735 /* parent thread's data needs to be locked while we make copy */
3736 MUTEX_LOCK(&t->mutex);
3737
14dd3ad8 3738#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 3739 PL_protect = t->Tprotect;
14dd3ad8 3740#endif
312caa8e 3741
b099ddc0
GS		 3742 PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
3743 PL_defstash = t->Tdefstash; /* XXX maybe these should */
3744 PL_curstash = t->Tcurstash; /* always be set to main? */
3745
6b88bc9c 3746 PL_tainted = t->Ttainted;
84fee439
NIS		 3747 PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
3748 PL_nrs = newSVsv(t->Tnrs);
7d3de3d5 3749 PL_rs = t->Tnrs ? SvREFCNT_inc(PL_nrs) : Nullsv;
84fee439 3750 PL_last_in_gv = Nullgv;
7d3de3d5 3751 PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv;
84fee439
NIS		 3752 PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
3753 PL_chopset = t->Tchopset;
84fee439
NIS		 3754 PL_bodytarget = newSVsv(t->Tbodytarget);
3755 PL_toptarget = newSVsv(t->Ttoptarget);
5c831c24
GS		 3756 if (t->Tformtarget == t->Ttoptarget)
3757 PL_formtarget = PL_toptarget;
3758 else
3759 PL_formtarget = PL_bodytarget;
533c011a 3760
54b9620d
MB		 3761 /* Initialise all per-thread SVs that the template thread used */
3762 svp = AvARRAY(t->threadsv);
93965878 3763 for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
533c011a 3764 if (*svp && *svp != &PL_sv_undef) {
199100c8 3765 SV *sv = newSVsv(*svp);
54b9620d 3766 av_store(thr->threadsv, i, sv);
14befaf4 3767 sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1);
bf49b057 3768 DEBUG_S(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 3769 "new_struct_thread: copied threadsv %"IVdf" %p->%p\n",
3770 (IV)i, t, thr));
199100c8 3771 }
a1d180c4 3772 }
940cb80d 3773 thr->threadsvp = AvARRAY(thr->threadsv);
199100c8 3774
533c011a
NIS		 3775 MUTEX_LOCK(&PL_threads_mutex);
3776 PL_nthreads++;
3777 thr->tid = ++PL_threadnum;
199100c8
MB		 3778 thr->next = t->next;
3779 thr->prev = t;
3780 t->next = thr;
3781 thr->next->prev = thr;
533c011a 3782 MUTEX_UNLOCK(&PL_threads_mutex);
a863c7d1 3783
b099ddc0
GS		 3784 /* done copying parent's state */
3785 MUTEX_UNLOCK(&t->mutex);
3786
a863c7d1 3787#ifdef HAVE_THREAD_INTERN
4f63d024 3788 Perl_init_thread_intern(thr);
a863c7d1 3789#endif /* HAVE_THREAD_INTERN */
a863c7d1
MB		 3790 return thr;
3791}
11343788 3792#endif /* USE_THREADS */
760ac839 3793
4d46a988 3794#if defined(HUGE_VAL) || (defined(USE_LONG_DOUBLE) && defined(HUGE_VALL))
760ac839
LW		 3795/*
3796 * This hack is to force load of "huge" support from libm.a
a1d180c4 3797 * So it is in perl for (say) POSIX to use.
760ac839
LW		 3798 * Needed for SunOS with Sun's 'acc' for example.
3799 */
a1d180c4 3800NV
8ac85365 3801Perl_huge(void)
760ac839 3802{
4d46a988
JH		 3803# if defined(USE_LONG_DOUBLE) && defined(HUGE_VALL)
3804 return HUGE_VALL;
3805# endif
3806 return HUGE_VAL;
760ac839
LW		 3807}
3808#endif
4e35701f 3809
22239a37
NIS		 3810#ifdef PERL_GLOBAL_STRUCT
3811struct perl_vars *
864dbfa3 3812Perl_GetVars(pTHX)
22239a37 3813{
533c011a 3814 return &PL_Vars;
22239a37 3815}
31fb1209
NIS		 3816#endif
3817
3818char **
864dbfa3 3819Perl_get_op_names(pTHX)
31fb1209 3820{
22c35a8c 3821 return PL_op_name;
31fb1209
NIS		 3822}
3823
3824char **
864dbfa3 3825Perl_get_op_descs(pTHX)
31fb1209 3826{
22c35a8c 3827 return PL_op_desc;
31fb1209 3828}
9e6b2b00
GS		 3829
3830char *
864dbfa3 3831Perl_get_no_modify(pTHX)
9e6b2b00 3832{
22c35a8c 3833 return (char*)PL_no_modify;
9e6b2b00
GS		 3834}
3835
3836U32 *
864dbfa3 3837Perl_get_opargs(pTHX)
9e6b2b00 3838{
22c35a8c 3839 return PL_opargs;
9e6b2b00 3840}
51aa15f3 3841
0cb96387
GS		 3842PPADDR_t*
3843Perl_get_ppaddr(pTHX)
3844{
12ae5dfc 3845 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS		 3846}
3847
a6c40364
GS		 3848#ifndef HAS_GETENV_LEN
3849char *
bf4acbe4 3850Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364
GS		 3851{
3852 char *env_trans = PerlEnv_getenv(env_elem);
3853 if (env_trans)
3854 *len = strlen(env_trans);
3855 return env_trans;
f675dbe5
CB		 3856}
3857#endif
3858
dc9e4912
GS		 3859
3860MGVTBL*
864dbfa3 3861Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912
GS		 3862{
3863 MGVTBL* result = Null(MGVTBL*);
3864
3865 switch(vtbl_id) {
3866 case want_vtbl_sv:
3867 result = &PL_vtbl_sv;
3868 break;
3869 case want_vtbl_env:
3870 result = &PL_vtbl_env;
3871 break;
3872 case want_vtbl_envelem:
3873 result = &PL_vtbl_envelem;
3874 break;
3875 case want_vtbl_sig:
3876 result = &PL_vtbl_sig;
3877 break;
3878 case want_vtbl_sigelem:
3879 result = &PL_vtbl_sigelem;
3880 break;
3881 case want_vtbl_pack:
3882 result = &PL_vtbl_pack;
3883 break;
3884 case want_vtbl_packelem:
3885 result = &PL_vtbl_packelem;
3886 break;
3887 case want_vtbl_dbline:
3888 result = &PL_vtbl_dbline;
3889 break;
3890 case want_vtbl_isa:
3891 result = &PL_vtbl_isa;
3892 break;
3893 case want_vtbl_isaelem:
3894 result = &PL_vtbl_isaelem;
3895 break;
3896 case want_vtbl_arylen:
3897 result = &PL_vtbl_arylen;
3898 break;
3899 case want_vtbl_glob:
3900 result = &PL_vtbl_glob;
3901 break;
3902 case want_vtbl_mglob:
3903 result = &PL_vtbl_mglob;
3904 break;
3905 case want_vtbl_nkeys:
3906 result = &PL_vtbl_nkeys;
3907 break;
3908 case want_vtbl_taint:
3909 result = &PL_vtbl_taint;
3910 break;
3911 case want_vtbl_substr:
3912 result = &PL_vtbl_substr;
3913 break;
3914 case want_vtbl_vec:
3915 result = &PL_vtbl_vec;
3916 break;
3917 case want_vtbl_pos:
3918 result = &PL_vtbl_pos;
3919 break;
3920 case want_vtbl_bm:
3921 result = &PL_vtbl_bm;
3922 break;
3923 case want_vtbl_fm:
3924 result = &PL_vtbl_fm;
3925 break;
3926 case want_vtbl_uvar:
3927 result = &PL_vtbl_uvar;
3928 break;
3929#ifdef USE_THREADS
3930 case want_vtbl_mutex:
3931 result = &PL_vtbl_mutex;
3932 break;
3933#endif
3934 case want_vtbl_defelem:
3935 result = &PL_vtbl_defelem;
3936 break;
3937 case want_vtbl_regexp:
3938 result = &PL_vtbl_regexp;
3939 break;
3940 case want_vtbl_regdata:
3941 result = &PL_vtbl_regdata;
3942 break;
3943 case want_vtbl_regdatum:
3944 result = &PL_vtbl_regdatum;
3945 break;
3c90161d 3946#ifdef USE_LOCALE_COLLATE
dc9e4912
GS		 3947 case want_vtbl_collxfrm:
3948 result = &PL_vtbl_collxfrm;
3949 break;
3c90161d 3950#endif
dc9e4912
GS		 3951 case want_vtbl_amagic:
3952 result = &PL_vtbl_amagic;
3953 break;
3954 case want_vtbl_amagicelem:
3955 result = &PL_vtbl_amagicelem;
3956 break;
810b8aa5
GS		 3957 case want_vtbl_backref:
3958 result = &PL_vtbl_backref;
3959 break;
dc9e4912
GS		 3960 }
3961 return result;
3962}
3963
767df6a1 3964I32
864dbfa3 3965Perl_my_fflush_all(pTHX)
767df6a1 3966{
8fbdfb7c 3967#if defined(FFLUSH_NULL)
ce720889 3968 return PerlIO_flush(NULL);
767df6a1 3969#else
8fbdfb7c 3970# if defined(HAS__FWALK)
74cac757
JH		 3971 /* undocumented, unprototyped, but very useful BSDism */
3972 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3973 _fwalk(&fflush);
74cac757 3974 return 0;
8fbdfb7c 3975# else
767df6a1 3976 long open_max = -1;
8fbdfb7c
JH		 3977# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3978# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
d2201af2 3979 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
8fbdfb7c
JH		 3980# else
3981# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
767df6a1 3982 open_max = sysconf(_SC_OPEN_MAX);
8fbdfb7c
JH		 3983# else
3984# ifdef FOPEN_MAX
74cac757 3985 open_max = FOPEN_MAX;
8fbdfb7c
JH		 3986# else
3987# ifdef OPEN_MAX
74cac757 3988 open_max = OPEN_MAX;
8fbdfb7c
JH		 3989# else
3990# ifdef _NFILE
d2201af2 3991 open_max = _NFILE;
74cac757 3992# endif
767df6a1
JH		 3993# endif
3994# endif
8fbdfb7c
JH		 3995# endif
3996# endif
767df6a1
JH		 3997 if (open_max > 0) {
3998 long i;
3999 for (i = 0; i < open_max; i++)
d2201af2
AD		 4000 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
4001 STDIO_STREAM_ARRAY[i]._file < open_max &&
4002 STDIO_STREAM_ARRAY[i]._flag)
4003 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
767df6a1
JH		 4004 return 0;
4005 }
8fbdfb7c 4006# endif
767df6a1
JH		 4007 SETERRNO(EBADF,RMS$_IFI);
4008 return EOF;
74cac757 4009# endif
767df6a1
JH		 4010#endif
4011}
097ee67d 4012
65202027 4013NV
69282e91
GS		 4014Perl_my_atof(pTHX_ const char* s)
4015{
ebd4816b 4016 NV x = 0.0;
097ee67d 4017#ifdef USE_LOCALE_NUMERIC
d43ce814 4018 if ((PL_hints & HINT_LOCALE) && PL_numeric_local) {
ebd4816b 4019 NV y;
097ee67d 4020
877f6a72 4021 Perl_atof2(aTHX_ s, &x);
097ee67d 4022 SET_NUMERIC_STANDARD();
877f6a72 4023 Perl_atof2(aTHX_ s, &y);
097ee67d
JH		 4024 SET_NUMERIC_LOCAL();
4025 if ((y < 0.0 && y < x) || (y > 0.0 && y > x))
4026 return y;
65202027
DS		 4027 }
4028 else
877f6a72 4029 Perl_atof2(aTHX_ s, &x);
097ee67d 4030#else
877f6a72 4031 Perl_atof2(aTHX_ s, &x);
097ee67d 4032#endif
ebd4816b 4033 return x;
097ee67d 4034}
69282e91 4035
877f6a72
NIS		 4036char*
4037Perl_my_atof2(pTHX_ const char* orig, NV* value)
4038{
4039 NV result = 0.0;
4040 bool negative = 0;
4041 char* s = (char*)orig;
4042 char* point = "."; /* locale-dependent decimal point equivalent */
4043 STRLEN pointlen = 1;
4044 bool seendigit = 0;
4045
4046 if (PL_numeric_radix_sv)
4047 point = SvPV(PL_numeric_radix_sv, pointlen);
4048
4049 switch (*s) {
4050 case '-':
4051 negative = 1;
4052 /* fall through */
4053 case '+':
4054 ++s;
4055 }
4056 while (isDIGIT(*s)) {
4057 result = result * 10 + (*s++ - '0');
4058 seendigit = 1;
4059 }
4060 if (memEQ(s, point, pointlen)) {
4061 NV decimal = 0.1;
4062
4063 s += pointlen;
4064 while (isDIGIT(*s)) {
4065 result += (*s++ - '0') * decimal;
4066 decimal *= 0.1;
4067 seendigit = 1;
4068 }
4069 }
4070 if (seendigit && (*s == 'e' || *s == 'E')) {
4071 I32 exponent = 0;
4072 I32 expnegative = 0;
4073 I32 bit;
4074 NV power;
4075
4076 ++s;
4077 switch (*s) {
4078 case '-':
4079 expnegative = 1;
4080 /* fall through */
4081 case '+':
4082 ++s;
4083 }
4084 while (isDIGIT(*s))
4085 exponent = exponent * 10 + (*s++ - '0');
4086
4087 /* now apply the exponent */
4088 power = (expnegative) ? 0.1 : 10.0;
4089 for (bit = 1; exponent; bit <<= 1) {
4090 if (exponent & bit) {
4091 exponent ^= bit;
4092 result *= power;
4093 }
4094 power *= power;
4095 }
4096 }
4097 if (negative)
4098 result = -result;
4099 *value = result;
4100 return s;
4101}
4102
69282e91 4103void
bc37a18f
RG		 4104Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
4105{
9c0fcd4f 4106 char *vile;
4e34385f 4107 I32 warn_type;
bc37a18f 4108 char *func =
66fc2fa5
JH		 4109 op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
4110 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
bc37a18f
RG		 4111 PL_op_desc[op];
4112 char *pars = OP_IS_FILETEST(op) ? "" : "()";
21865922
JH		 4113 char *type = OP_IS_SOCKET(op) ||
4114 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
2dd78f96 4115 "socket" : "filehandle";
9c0fcd4f 4116 char *name = NULL;
bc37a18f 4117
21865922 4118 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
9c0fcd4f 4119 vile = "closed";
4e34385f 4120 warn_type = WARN_CLOSED;
2dd78f96
JH		 4121 }
4122 else {
9c0fcd4f 4123 vile = "unopened";
4e34385f 4124 warn_type = WARN_UNOPENED;
9c0fcd4f 4125 }
bc37a18f 4126
66fc2fa5
JH		 4127 if (gv && isGV(gv)) {
4128 SV *sv = sv_newmortal();
4129 gv_efullname4(sv, gv, Nullch, FALSE);
4130 name = SvPVX(sv);
4131 }
4132
4c80c0b2
NC		 4133 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
4134 if (name && *name)
4135 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for %sput",
7889fe52 4136 name,
4c80c0b2
NC		 4137 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
4138 else
4139 Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for %sput",
4140 (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
4141 } else if (name && *name) {
4e34385f 4142 Perl_warner(aTHX_ warn_type,
9c0fcd4f 4143 "%s%s on %s %s %s", func, pars, vile, type, name);
3e11456d 4144 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 4145 Perl_warner(aTHX_ warn_type,
bc37a18f
RG		 4146 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
4147 func, pars, name);
2dd78f96
JH		 4148 }
4149 else {
4e34385f 4150 Perl_warner(aTHX_ warn_type,
9c0fcd4f 4151 "%s%s on %s %s", func, pars, vile, type);
21865922 4152 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
4e34385f 4153 Perl_warner(aTHX_ warn_type,
bc37a18f
RG		 4154 "\t(Are you trying to call %s%s on dirhandle?)\n",
4155 func, pars);
4156 }
69282e91 4157}
a926ef6b
JH		 4158
4159#ifdef EBCDIC
cbebf344
JH		 4160/* in ASCII order, not that it matters */
4161static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
4162
a926ef6b
JH		 4163int
4164Perl_ebcdic_control(pTHX_ int ch)
4165{
4166 if (ch > 'a') {
4167 char *ctlp;
4a7d1889 4168
a926ef6b
JH		 4169 if (islower(ch))
4170 ch = toupper(ch);
4a7d1889 4171
a926ef6b
JH		 4172 if ((ctlp = strchr(controllablechars, ch)) == 0) {
4173 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
4174 }
4a7d1889 4175
a926ef6b
JH		 4176 if (ctlp == controllablechars)
4177 return('\177'); /* DEL */
4178 else
4179 return((unsigned char)(ctlp - controllablechars - 1));
4180 } else { /* Want uncontrol */
4181 if (ch == '\177' || ch == -1)
4182 return('?');
4183 else if (ch == '\157')
4184 return('\177');
4185 else if (ch == '\174')
4186 return('\000');
4187 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
4188 return('\036');
4189 else if (ch == '\155')
4190 return('\037');
4191 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
4192 return(controllablechars[ch+1]);
4193 else
4194 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
4195 }
4196}
4197#endif
e72cf795 4198
e72cf795
JH		 4199/* XXX struct tm on some systems (SunOS4/BSD) contains extra (non POSIX)
4200 * fields for which we don't have Configure support yet:
4201 * char *tm_zone; -- abbreviation of timezone name
4202 * long tm_gmtoff; -- offset from GMT in seconds
4203 * To workaround core dumps from the uninitialised tm_zone we get the
4204 * system to give us a reasonable struct to copy. This fix means that
4205 * strftime uses the tm_zone and tm_gmtoff values returned by
4206 * localtime(time()). That should give the desired result most of the
4207 * time. But probably not always!
4208 *
4209 * This is a temporary workaround to be removed once Configure
4210 * support is added and NETaa14816 is considered in full.
4211 * It does not address tzname aspects of NETaa14816.
4212 */
4213#ifdef HAS_GNULIBC
4214# ifndef STRUCT_TM_HASZONE
4215# define STRUCT_TM_HASZONE
4216# endif
4217#endif
4218
4219void
f1208910 4220Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
e72cf795
JH		 4221{
4222#ifdef STRUCT_TM_HASZONE
4223 Time_t now;
4224 (void)time(&now);
4225 Copy(localtime(&now), ptm, 1, struct tm);
4226#endif
4227}
4228
4229/*
4230 * mini_mktime - normalise struct tm values without the localtime()
4231 * semantics (and overhead) of mktime().
4232 */
4233void
f1208910 4234Perl_mini_mktime(pTHX_ struct tm *ptm)
e72cf795
JH		 4235{
4236 int yearday;
4237 int secs;
4238 int month, mday, year, jday;
4239 int odd_cent, odd_year;
4240
4241#define DAYS_PER_YEAR 365
4242#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
4243#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
4244#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
4245#define SECS_PER_HOUR (60*60)
4246#define SECS_PER_DAY (24*SECS_PER_HOUR)
4247/* parentheses deliberately absent on these two, otherwise they don't work */
4248#define MONTH_TO_DAYS 153/5
4249#define DAYS_TO_MONTH 5/153
4250/* offset to bias by March (month 4) 1st between month/mday & year finding */
4251#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
4252/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
4253#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
4254
4255/*
4256 * Year/day algorithm notes:
4257 *
4258 * With a suitable offset for numeric value of the month, one can find
4259 * an offset into the year by considering months to have 30.6 (153/5) days,
4260 * using integer arithmetic (i.e., with truncation). To avoid too much
4261 * messing about with leap days, we consider January and February to be
4262 * the 13th and 14th month of the previous year. After that transformation,
4263 * we need the month index we use to be high by 1 from 'normal human' usage,
4264 * so the month index values we use run from 4 through 15.
4265 *
4266 * Given that, and the rules for the Gregorian calendar (leap years are those
4267 * divisible by 4 unless also divisible by 100, when they must be divisible
4268 * by 400 instead), we can simply calculate the number of days since some
4269 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
4270 * the days we derive from our month index, and adding in the day of the
4271 * month. The value used here is not adjusted for the actual origin which
4272 * it normally would use (1 January A.D. 1), since we're not exposing it.
4273 * We're only building the value so we can turn around and get the
4274 * normalised values for the year, month, day-of-month, and day-of-year.
4275 *
4276 * For going backward, we need to bias the value we're using so that we find
4277 * the right year value. (Basically, we don't want the contribution of
4278 * March 1st to the number to apply while deriving the year). Having done
4279 * that, we 'count up' the contribution to the year number by accounting for
4280 * full quadracenturies (400-year periods) with their extra leap days, plus
4281 * the contribution from full centuries (to avoid counting in the lost leap
4282 * days), plus the contribution from full quad-years (to count in the normal
4283 * leap days), plus the leftover contribution from any non-leap years.
4284 * At this point, if we were working with an actual leap day, we'll have 0
4285 * days left over. This is also true for March 1st, however. So, we have
4286 * to special-case that result, and (earlier) keep track of the 'odd'
4287 * century and year contributions. If we got 4 extra centuries in a qcent,
4288 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
4289 * Otherwise, we add back in the earlier bias we removed (the 123 from
4290 * figuring in March 1st), find the month index (integer division by 30.6),
4291 * and the remainder is the day-of-month. We then have to convert back to
4292 * 'real' months (including fixing January and February from being 14/15 in
4293 * the previous year to being in the proper year). After that, to get
4294 * tm_yday, we work with the normalised year and get a new yearday value for
4295 * January 1st, which we subtract from the yearday value we had earlier,
4296 * representing the date we've re-built. This is done from January 1
4297 * because tm_yday is 0-origin.
4298 *
4299 * Since POSIX time routines are only guaranteed to work for times since the
4300 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
4301 * applies Gregorian calendar rules even to dates before the 16th century
4302 * doesn't bother me. Besides, you'd need cultural context for a given
4303 * date to know whether it was Julian or Gregorian calendar, and that's
4304 * outside the scope for this routine. Since we convert back based on the
4305 * same rules we used to build the yearday, you'll only get strange results
4306 * for input which needed normalising, or for the 'odd' century years which
4307 * were leap years in the Julian calander but not in the Gregorian one.
4308 * I can live with that.
4309 *
4310 * This algorithm also fails to handle years before A.D. 1 gracefully, but
4311 * that's still outside the scope for POSIX time manipulation, so I don't
4312 * care.
4313 */
4314
4315 year = 1900 + ptm->tm_year;
4316 month = ptm->tm_mon;
4317 mday = ptm->tm_mday;
4318 /* allow given yday with no month & mday to dominate the result */
4319 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
4320 month = 0;
4321 mday = 0;
4322 jday = 1 + ptm->tm_yday;
4323 }
4324 else {
4325 jday = 0;
4326 }
4327 if (month >= 2)
4328 month+=2;
4329 else
4330 month+=14, year--;
4331 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
4332 yearday += month*MONTH_TO_DAYS + mday + jday;
4333 /*
4334 * Note that we don't know when leap-seconds were or will be,
4335 * so we have to trust the user if we get something which looks
4336 * like a sensible leap-second. Wild values for seconds will
4337 * be rationalised, however.
4338 */
4339 if ((unsigned) ptm->tm_sec <= 60) {
4340 secs = 0;
4341 }
4342 else {
4343 secs = ptm->tm_sec;
4344 ptm->tm_sec = 0;
4345 }
4346 secs += 60 * ptm->tm_min;
4347 secs += SECS_PER_HOUR * ptm->tm_hour;
4348 if (secs < 0) {
4349 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
4350 /* got negative remainder, but need positive time */
4351 /* back off an extra day to compensate */
4352 yearday += (secs/SECS_PER_DAY)-1;
4353 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
4354 }
4355 else {
4356 yearday += (secs/SECS_PER_DAY);
4357 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
4358 }
4359 }
4360 else if (secs >= SECS_PER_DAY) {
4361 yearday += (secs/SECS_PER_DAY);
4362 secs %= SECS_PER_DAY;
4363 }
4364 ptm->tm_hour = secs/SECS_PER_HOUR;
4365 secs %= SECS_PER_HOUR;
4366 ptm->tm_min = secs/60;
4367 secs %= 60;
4368 ptm->tm_sec += secs;
4369 /* done with time of day effects */
4370 /*
4371 * The algorithm for yearday has (so far) left it high by 428.
4372 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
4373 * bias it by 123 while trying to figure out what year it
4374 * really represents. Even with this tweak, the reverse
4375 * translation fails for years before A.D. 0001.
4376 * It would still fail for Feb 29, but we catch that one below.
4377 */
4378 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
4379 yearday -= YEAR_ADJUST;
4380 year = (yearday / DAYS_PER_QCENT) * 400;
4381 yearday %= DAYS_PER_QCENT;
4382 odd_cent = yearday / DAYS_PER_CENT;
4383 year += odd_cent * 100;
4384 yearday %= DAYS_PER_CENT;
4385 year += (yearday / DAYS_PER_QYEAR) * 4;
4386 yearday %= DAYS_PER_QYEAR;
4387 odd_year = yearday / DAYS_PER_YEAR;
4388 year += odd_year;
4389 yearday %= DAYS_PER_YEAR;
4390 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
4391 month = 1;
4392 yearday = 29;
4393 }
4394 else {
4395 yearday += YEAR_ADJUST; /* recover March 1st crock */
4396 month = yearday*DAYS_TO_MONTH;
4397 yearday -= month*MONTH_TO_DAYS;
4398 /* recover other leap-year adjustment */
4399 if (month > 13) {
4400 month-=14;
4401 year++;
4402 }
4403 else {
4404 month-=2;
4405 }
4406 }
4407 ptm->tm_year = year - 1900;
4408 if (yearday) {
4409 ptm->tm_mday = yearday;
4410 ptm->tm_mon = month;
4411 }
4412 else {
4413 ptm->tm_mday = 31;
4414 ptm->tm_mon = month - 1;
4415 }
4416 /* re-build yearday based on Jan 1 to get tm_yday */
4417 year--;
4418 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
4419 yearday += 14*MONTH_TO_DAYS + 1;
4420 ptm->tm_yday = jday - yearday;
4421 /* fix tm_wday if not overridden by caller */
4422 if ((unsigned)ptm->tm_wday > 6)
4423 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
4424}
b3c85772
JH		 4425
4426char *
f1208910 4427Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
b3c85772
JH		 4428{
4429#ifdef HAS_STRFTIME
4430 char *buf;
4431 int buflen;
4432 struct tm mytm;
4433 int len;
4434
4435 init_tm(&mytm); /* XXX workaround - see init_tm() above */
4436 mytm.tm_sec = sec;
4437 mytm.tm_min = min;
4438 mytm.tm_hour = hour;
4439 mytm.tm_mday = mday;
4440 mytm.tm_mon = mon;
4441 mytm.tm_year = year;
4442 mytm.tm_wday = wday;
4443 mytm.tm_yday = yday;
4444 mytm.tm_isdst = isdst;
4445 mini_mktime(&mytm);
4446 buflen = 64;
4447 New(0, buf, buflen, char);
4448 len = strftime(buf, buflen, fmt, &mytm);
4449 /*
877f6a72 4450 ** The following is needed to handle to the situation where
b3c85772
JH		 4451 ** tmpbuf overflows. Basically we want to allocate a buffer
4452 ** and try repeatedly. The reason why it is so complicated
4453 ** is that getting a return value of 0 from strftime can indicate
4454 ** one of the following:
4455 ** 1. buffer overflowed,
4456 ** 2. illegal conversion specifier, or
4457 ** 3. the format string specifies nothing to be returned(not
4458 ** an error). This could be because format is an empty string
4459 ** or it specifies %p that yields an empty string in some locale.
4460 ** If there is a better way to make it portable, go ahead by
4461 ** all means.
4462 */
4463 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
4464 return buf;
4465 else {
4466 /* Possibly buf overflowed - try again with a bigger buf */
4467 int fmtlen = strlen(fmt);
4468 int bufsize = fmtlen + buflen;
877f6a72 4469
b3c85772
JH		 4470 New(0, buf, bufsize, char);
4471 while (buf) {
4472 buflen = strftime(buf, bufsize, fmt, &mytm);
4473 if (buflen > 0 && buflen < bufsize)
4474 break;
4475 /* heuristic to prevent out-of-memory errors */
4476 if (bufsize > 100*fmtlen) {
4477 Safefree(buf);
4478 buf = NULL;
4479 break;
4480 }
4481 bufsize *= 2;
4482 Renew(buf, bufsize, char);
4483 }
4484 return buf;
4485 }
4486#else
4487 Perl_croak(aTHX_ "panic: no strftime");
4488#endif
4489}
4490
877f6a72
NIS		 4491
4492#define SV_CWD_RETURN_UNDEF \
4493sv_setsv(sv, &PL_sv_undef); \
4494return FALSE
4495
4496#define SV_CWD_ISDOT(dp) \
4497 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
4498 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
4499
4500/*
4501=for apidoc sv_getcwd
4502
4503Fill the sv with current working directory
4504
4505=cut
4506*/
4507
4508/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
4509 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
4510 * getcwd(3) if available
4511 * Comments from the orignal:
4512 * This is a faster version of getcwd. It's also more dangerous
4513 * because you might chdir out of a directory that you can't chdir
4514 * back into. */
4515
4516/* XXX: this needs more porting #ifndef HAS_GETCWD */
4517int
4518Perl_sv_getcwd(pTHX_ register SV *sv)
4519{
4520#ifndef PERL_MICRO
4521
4522#ifndef HAS_GETCWD
4523 struct stat statbuf;
4524 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4525 int namelen, pathlen=0;
4526 DIR *dir;
4527 Direntry_t *dp;
4528#endif
4529
4530 (void)SvUPGRADE(sv, SVt_PV);
4531
4532#ifdef HAS_GETCWD
4533
4534 SvGROW(sv, 128);
4535 while ((getcwd(SvPVX(sv), SvLEN(sv)-1) == NULL) && errno == ERANGE) {
4536 SvGROW(sv, SvLEN(sv) + 128);
4537 }
4538 SvCUR_set(sv, strlen(SvPVX(sv)));
4539 SvPOK_only(sv);
4540
4541#else
4542
4543 if (PerlLIO_lstat(".", &statbuf) < 0) {
4544 CWDXS_RETURN_SVUNDEF(sv);
4545 }
4546
4547 orig_cdev = statbuf.st_dev;
4548 orig_cino = statbuf.st_ino;
4549 cdev = orig_cdev;
4550 cino = orig_cino;
4551
4552 for (;;) {
4553 odev = cdev;
4554 oino = cino;
4555
4556 if (PerlDir_chdir("..") < 0) {
4557 SV_CWD_RETURN_UNDEF;
4558 }
4559 if (PerlLIO_stat(".", &statbuf) < 0) {
4560 SV_CWD_RETURN_UNDEF;
4561 }
4562
4563 cdev = statbuf.st_dev;
4564 cino = statbuf.st_ino;
4565
4566 if (odev == cdev && oino == cino) {
4567 break;
4568 }
4569 if (!(dir = PerlDir_open("."))) {
4570 SV_CWD_RETURN_UNDEF;
4571 }
4572
4573 while ((dp = PerlDir_read(dir)) != NULL) {
4574#ifdef DIRNAMLEN
4575 namelen = dp->d_namlen;
4576#else
4577 namelen = strlen(dp->d_name);
4578#endif
4579 /* skip . and .. */
4580 if (SV_CWD_ISDOT(dp)) {dp->d_name[0] == '.'
4581 continue;
4582 }
4583
4584 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
4585 SV_CWD_RETURN_UNDEF;
4586 }
4587
4588 tdev = statbuf.st_dev;
4589 tino = statbuf.st_ino;
4590 if (tino == oino && tdev == odev) {
4591 break;
4592 }
4593 }
4594
4595 if (!dp) {
4596 SV_CWD_RETURN_UNDEF;
4597 }
4598
4599 SvGROW(sv, pathlen + namelen + 1);
4600
4601 if (pathlen) {
4602 /* shift down */
4603 Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4604 }
4605
4606 /* prepend current directory to the front */
4607 *SvPVX(sv) = '/';
4608 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4609 pathlen += (namelen + 1);
4610
4611#ifdef VOID_CLOSEDIR
4612 PerlDir_close(dir);
4613#else
4614 if (PerlDir_close(dir) < 0) {
4615 SV_CWD_RETURN_UNDEF;
4616 }
4617#endif
4618 }
4619
4620 SvCUR_set(sv, pathlen);
4621 *SvEND(sv) = '\0';
4622 SvPOK_only(sv);
4623
4624 if (PerlDir_chdir(SvPVX(sv)) < 0) {
4625 SV_CWD_RETURN_UNDEF;
4626 }
4627 if (PerlLIO_stat(".", &statbuf) < 0) {
4628 SV_CWD_RETURN_UNDEF;
4629 }
4630
4631 cdev = statbuf.st_dev;
4632 cino = statbuf.st_ino;
4633
4634 if (cdev != orig_cdev || cino != orig_cino) {
4635 Perl_croak(aTHX_ "Unstable directory path, "
4636 "current directory changed unexpectedly");
4637 }
4638#endif
4639
4640 return TRUE;
4641#else
4642 return FALSE;
4643#endif
4644}
4645
4646/*
4647=for apidoc sv_realpath
4648
4649Wrap or emulate realpath(3).
4650
4651=cut
4652 */
4653int
4654Perl_sv_realpath(pTHX_ SV *sv, char *path, STRLEN len)
4655{
4656#ifndef PERL_MICRO
4657 char name[MAXPATHLEN] = { 0 }, *s;
4658 STRLEN pathlen, namelen;
4659
4660#ifdef HAS_REALPATH
4661 /* Be paranoid about the use of realpath(),
4662 * it is an infamous source of buffer overruns. */
4663
4664 /* Is the source buffer too long?
4665 * Don't use strlen() to avoid running off the end. */
4666 s = memchr(path, '\0', MAXPATHLEN);
4667 pathlen = s ? s - path : MAXPATHLEN;
4668 if (pathlen == MAXPATHLEN) {
4669 Perl_warn(aTHX_ "sv_realpath: realpath(\"%s\"): %c= (MAXPATHLEN = %d)",
4670 path, s ? '=' : '>', MAXPATHLEN);
4671 SV_CWD_RETURN_UNDEF;
4672 }
4673
4674 /* Here goes nothing. */
4675 if (realpath(path, name) == NULL) {
4676 Perl_warn(aTHX_ "sv_realpath: realpath(\"%s\"): %s",
4677 path, Strerror(errno));
4678 SV_CWD_RETURN_UNDEF;
4679 }
4680
4681 /* Is the destination buffer too long?
4682 * Don't use strlen() to avoid running off the end. */
4683 s = memchr(name, '\0', MAXPATHLEN);
4684 namelen = s ? s - name : MAXPATHLEN;
4685 if (namelen == MAXPATHLEN) {
4686 Perl_warn(aTHX_ "sv_realpath: realpath(\"%s\"): %c= (MAXPATHLEN = %d)",
4687 path, s ? '=' : '>', MAXPATHLEN);
4688 SV_CWD_RETURN_UNDEF;
4689 }
4690
4691 /* The coast is clear? */
4692 sv_setpvn(sv, name, namelen);
4693 SvPOK_only(sv);
4694
4695 return TRUE;
4696#else
4697 DIR *parent;
4698 Direntry_t *dp;
4699 char dotdots[MAXPATHLEN] = { 0 };
4700 struct stat cst, pst, tst;
4701
4702 if (PerlLIO_stat(path, &cst) < 0) {
4703 Perl_warn(aTHX_ "sv_realpath: stat(\"%s\"): %s",
4704 path, Strerror(errno));
4705 SV_CWD_RETURN_UNDEF;
4706 }
4707
4708 (void)SvUPGRADE(sv, SVt_PV);
4709
4710 if (!len) {
4711 len = strlen(path);
4712 }
4713 Copy(path, dotdots, len, char);
4714
4715 for (;;) {
4716 strcat(dotdots, "/..");
4717 StructCopy(&cst, &pst, struct stat);
4718
4719 if (PerlLIO_stat(dotdots, &cst) < 0) {
4720 Perl_warn(aTHX_ "sv_realpath: stat(\"%s\"): %s",
4721 dotdots, Strerror(errno));
4722 SV_CWD_RETURN_UNDEF;
4723 }
4724
4725 if (pst.st_dev == cst.st_dev && pst.st_ino == cst.st_ino) {
4726 /* We've reached the root: previous is same as current */
4727 break;
4728 } else {
4729 STRLEN dotdotslen = strlen(dotdots);
4730
4731 /* Scan through the dir looking for name of previous */
4732 if (!(parent = PerlDir_open(dotdots))) {
4733 Perl_warn(aTHX_ "sv_realpath: opendir(\"%s\"): %s",
4734 dotdots, Strerror(errno));
4735 SV_CWD_RETURN_UNDEF;
4736 }
4737
4738 SETERRNO(0,SS$_NORMAL); /* for readdir() */
4739 while ((dp = PerlDir_read(parent)) != NULL) {
4740 if (SV_CWD_ISDOT(dp)) {
4741 continue;
4742 }
4743
4744 Copy(dotdots, name, dotdotslen, char);
4745 name[dotdotslen] = '/';
4746#ifdef DIRNAMLEN
4747 namelen = dp->d_namlen;
4748#else
4749 namelen = strlen(dp->d_name);
4750#endif
4751 Copy(dp->d_name, name + dotdotslen + 1, namelen, char);
4752 name[dotdotslen + 1 + namelen] = 0;
4753
4754 if (PerlLIO_lstat(name, &tst) < 0) {
4755 PerlDir_close(parent);
4756 Perl_warn(aTHX_ "sv_realpath: lstat(\"%s\"): %s",
4757 name, Strerror(errno));
4758 SV_CWD_RETURN_UNDEF;
4759 }
4760
4761 if (tst.st_dev == pst.st_dev && tst.st_ino == pst.st_ino)
4762 break;
4763
4764 SETERRNO(0,SS$_NORMAL); /* for readdir() */
4765 }
4766
4767 if (!dp && errno) {
4768 Perl_warn(aTHX_ "sv_realpath: readdir(\"%s\"): %s",
4769 dotdots, Strerror(errno));
4770 SV_CWD_RETURN_UNDEF;
4771 }
4772
4773 SvGROW(sv, pathlen + namelen + 1);
4774 if (pathlen) {
4775 /* shift down */
4776 Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4777 }
4778
4779 *SvPVX(sv) = '/';
4780 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4781 pathlen += (namelen + 1);
4782
4783#ifdef VOID_CLOSEDIR
4784 PerlDir_close(parent);
4785#else
4786 if (PerlDir_close(parent) < 0) {
4787 Perl_warn(aTHX_ "sv_realpath: closedir(\"%s\"): %s",
4788 dotdots, Strerror(errno));
4789 SV_CWD_RETURN_UNDEF;
4790 }
4791#endif
4792 }
4793 }
4794
4795 SvCUR_set(sv, pathlen);
4796 SvPOK_only(sv);
4797
4798 return TRUE;
4799#endif
4800#else
4801 return FALSE;
4802#endif
4803}
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