3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content." --Gandalf
16 /* This file contains assorted utility routines.
17 * Which is a polite way of saying any stuff that people couldn't think of
18 * a better place for. Amongst other things, it includes the warning and
19 * dieing stuff, plus wrappers for malloc code.
23 #define PERL_IN_UTIL_C
29 # define SIG_ERR ((Sighandler_t) -1)
34 /* Missing protos on LynxOS */
39 # include <sys/wait.h>
44 # include <sys/select.h>
50 #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
51 # define FD_CLOEXEC 1 /* NeXT needs this */
54 /* NOTE: Do not call the next three routines directly. Use the macros
55 * in handy.h, so that we can easily redefine everything to do tracking of
56 * allocated hunks back to the original New to track down any memory leaks.
57 * XXX This advice seems to be widely ignored :-( --AD August 1996.
64 /* Can't use PerlIO to write as it allocates memory */
65 PerlLIO_write(PerlIO_fileno(Perl_error_log),
66 PL_no_mem, strlen(PL_no_mem));
68 NORETURN_FUNCTION_END;
71 /* paranoid version of system's malloc() */
74 Perl_safesysmalloc(MEM_SIZE size)
80 PerlIO_printf(Perl_error_log,
81 "Allocation too large: %lx\n", size) FLUSH;
84 #endif /* HAS_64K_LIMIT */
85 #ifdef PERL_TRACK_MEMPOOL
90 Perl_croak_nocontext("panic: malloc");
92 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
93 PERL_ALLOC_CHECK(ptr);
94 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
96 #ifdef PERL_TRACK_MEMPOOL
97 struct perl_memory_debug_header *const header
98 = (struct perl_memory_debug_header *)ptr;
102 PoisonNew(((char *)ptr), size, char);
105 #ifdef PERL_TRACK_MEMPOOL
106 header->interpreter = aTHX;
107 /* Link us into the list. */
108 header->prev = &PL_memory_debug_header;
109 header->next = PL_memory_debug_header.next;
110 PL_memory_debug_header.next = header;
111 header->next->prev = header;
115 ptr = (Malloc_t)((char*)ptr+sTHX);
122 return write_no_mem();
127 /* paranoid version of system's realloc() */
130 Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
134 #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
135 Malloc_t PerlMem_realloc();
136 #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
140 PerlIO_printf(Perl_error_log,
141 "Reallocation too large: %lx\n", size) FLUSH;
144 #endif /* HAS_64K_LIMIT */
151 return safesysmalloc(size);
152 #ifdef PERL_TRACK_MEMPOOL
153 where = (Malloc_t)((char*)where-sTHX);
156 struct perl_memory_debug_header *const header
157 = (struct perl_memory_debug_header *)where;
159 if (header->interpreter != aTHX) {
160 Perl_croak_nocontext("panic: realloc from wrong pool");
162 assert(header->next->prev == header);
163 assert(header->prev->next == header);
165 if (header->size > size) {
166 const MEM_SIZE freed_up = header->size - size;
167 char *start_of_freed = ((char *)where) + size;
168 PoisonFree(start_of_freed, freed_up, char);
176 Perl_croak_nocontext("panic: realloc");
178 ptr = (Malloc_t)PerlMem_realloc(where,size);
179 PERL_ALLOC_CHECK(ptr);
181 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
182 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
185 #ifdef PERL_TRACK_MEMPOOL
186 struct perl_memory_debug_header *const header
187 = (struct perl_memory_debug_header *)ptr;
190 if (header->size < size) {
191 const MEM_SIZE fresh = size - header->size;
192 char *start_of_fresh = ((char *)ptr) + size;
193 PoisonNew(start_of_fresh, fresh, char);
197 header->next->prev = header;
198 header->prev->next = header;
200 ptr = (Malloc_t)((char*)ptr+sTHX);
207 return write_no_mem();
212 /* safe version of system's free() */
215 Perl_safesysfree(Malloc_t where)
217 #if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
222 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
224 #ifdef PERL_TRACK_MEMPOOL
225 where = (Malloc_t)((char*)where-sTHX);
227 struct perl_memory_debug_header *const header
228 = (struct perl_memory_debug_header *)where;
230 if (header->interpreter != aTHX) {
231 Perl_croak_nocontext("panic: free from wrong pool");
234 Perl_croak_nocontext("panic: duplicate free");
236 if (!(header->next) || header->next->prev != header
237 || header->prev->next != header) {
238 Perl_croak_nocontext("panic: bad free");
240 /* Unlink us from the chain. */
241 header->next->prev = header->prev;
242 header->prev->next = header->next;
244 PoisonNew(where, header->size, char);
246 /* Trigger the duplicate free warning. */
254 /* safe version of system's calloc() */
257 Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
261 MEM_SIZE total_size = 0;
263 /* Even though calloc() for zero bytes is strange, be robust. */
264 if (size && (count <= MEM_SIZE_MAX / size))
265 total_size = size * count;
267 Perl_croak_nocontext(PL_memory_wrap);
268 #ifdef PERL_TRACK_MEMPOOL
269 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
272 Perl_croak_nocontext(PL_memory_wrap);
275 if (total_size > 0xffff) {
276 PerlIO_printf(Perl_error_log,
277 "Allocation too large: %lx\n", total_size) FLUSH;
280 #endif /* HAS_64K_LIMIT */
282 if ((long)size < 0 || (long)count < 0)
283 Perl_croak_nocontext("panic: calloc");
285 #ifdef PERL_TRACK_MEMPOOL
286 /* Have to use malloc() because we've added some space for our tracking
288 /* malloc(0) is non-portable. */
289 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
291 /* Use calloc() because it might save a memset() if the memory is fresh
292 and clean from the OS. */
294 ptr = (Malloc_t)PerlMem_calloc(count, size);
295 else /* calloc(0) is non-portable. */
296 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
298 PERL_ALLOC_CHECK(ptr);
299 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size));
301 #ifdef PERL_TRACK_MEMPOOL
303 struct perl_memory_debug_header *const header
304 = (struct perl_memory_debug_header *)ptr;
306 memset((void*)ptr, 0, total_size);
307 header->interpreter = aTHX;
308 /* Link us into the list. */
309 header->prev = &PL_memory_debug_header;
310 header->next = PL_memory_debug_header.next;
311 PL_memory_debug_header.next = header;
312 header->next->prev = header;
314 header->size = total_size;
316 ptr = (Malloc_t)((char*)ptr+sTHX);
323 return write_no_mem();
326 /* These must be defined when not using Perl's malloc for binary
331 Malloc_t Perl_malloc (MEM_SIZE nbytes)
334 return (Malloc_t)PerlMem_malloc(nbytes);
337 Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
340 return (Malloc_t)PerlMem_calloc(elements, size);
343 Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
346 return (Malloc_t)PerlMem_realloc(where, nbytes);
349 Free_t Perl_mfree (Malloc_t where)
357 /* copy a string up to some (non-backslashed) delimiter, if any */
360 Perl_delimcpy(pTHX_ register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
365 for (tolen = 0; from < fromend; from++, tolen++) {
367 if (from[1] != delim) {
374 else if (*from == delim)
385 /* return ptr to little string in big string, NULL if not found */
386 /* This routine was donated by Corey Satten. */
389 Perl_instr(pTHX_ register const char *big, register const char *little)
400 register const char *s, *x;
403 for (x=big,s=little; *s; /**/ ) {
414 return (char*)(big-1);
419 /* same as instr but allow embedded nulls */
422 Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
428 char first = *little++;
430 bigend -= lend - little;
432 while (big <= bigend) {
433 if (*big++ == first) {
434 for (x=big,s=little; s < lend; x++,s++) {
438 return (char*)(big-1);
445 /* reverse of the above--find last substring */
448 Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
450 register const char *bigbeg;
451 register const I32 first = *little;
452 register const char * const littleend = lend;
455 if (little >= littleend)
456 return (char*)bigend;
458 big = bigend - (littleend - little++);
459 while (big >= bigbeg) {
460 register const char *s, *x;
463 for (x=big+2,s=little; s < littleend; /**/ ) {
472 return (char*)(big+1);
477 /* As a space optimization, we do not compile tables for strings of length
478 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
479 special-cased in fbm_instr().
481 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
484 =head1 Miscellaneous Functions
486 =for apidoc fbm_compile
488 Analyses the string in order to make fast searches on it using fbm_instr()
489 -- the Boyer-Moore algorithm.
495 Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
498 register const U8 *s;
504 if (flags & FBMcf_TAIL) {
505 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
506 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
507 if (mg && mg->mg_len >= 0)
510 s = (U8*)SvPV_force_mutable(sv, len);
511 if (len == 0) /* TAIL might be on a zero-length string. */
513 SvUPGRADE(sv, SVt_PVGV);
518 const unsigned char *sb;
519 const U8 mlen = (len>255) ? 255 : (U8)len;
522 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
524 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
525 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
526 memset((void*)table, mlen, 256);
528 sb = s - mlen + 1; /* first char (maybe) */
530 if (table[*s] == mlen)
535 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
537 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
539 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
540 for (i = 0; i < len; i++) {
541 if (PL_freq[s[i]] < frequency) {
543 frequency = PL_freq[s[i]];
546 BmFLAGS(sv) = (U8)flags;
547 BmRARE(sv) = s[rarest];
548 BmPREVIOUS(sv) = rarest;
549 BmUSEFUL(sv) = 100; /* Initial value */
550 if (flags & FBMcf_TAIL)
552 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
553 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
556 /* If SvTAIL(littlestr), it has a fake '\n' at end. */
557 /* If SvTAIL is actually due to \Z or \z, this gives false positives
561 =for apidoc fbm_instr
563 Returns the location of the SV in the string delimited by C<str> and
564 C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
565 does not have to be fbm_compiled, but the search will not be as fast
572 Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
574 register unsigned char *s;
576 register const unsigned char *little
577 = (const unsigned char *)SvPV_const(littlestr,l);
578 register STRLEN littlelen = l;
579 register const I32 multiline = flags & FBMrf_MULTILINE;
581 if ((STRLEN)(bigend - big) < littlelen) {
582 if ( SvTAIL(littlestr)
583 && ((STRLEN)(bigend - big) == littlelen - 1)
585 || (*big == *little &&
586 memEQ((char *)big, (char *)little, littlelen - 1))))
591 if (littlelen <= 2) { /* Special-cased */
593 if (littlelen == 1) {
594 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
595 /* Know that bigend != big. */
596 if (bigend[-1] == '\n')
597 return (char *)(bigend - 1);
598 return (char *) bigend;
606 if (SvTAIL(littlestr))
607 return (char *) bigend;
611 return (char*)big; /* Cannot be SvTAIL! */
614 if (SvTAIL(littlestr) && !multiline) {
615 if (bigend[-1] == '\n' && bigend[-2] == *little)
616 return (char*)bigend - 2;
617 if (bigend[-1] == *little)
618 return (char*)bigend - 1;
622 /* This should be better than FBM if c1 == c2, and almost
623 as good otherwise: maybe better since we do less indirection.
624 And we save a lot of memory by caching no table. */
625 const unsigned char c1 = little[0];
626 const unsigned char c2 = little[1];
631 while (s <= bigend) {
641 goto check_1char_anchor;
652 goto check_1char_anchor;
655 while (s <= bigend) {
660 goto check_1char_anchor;
669 check_1char_anchor: /* One char and anchor! */
670 if (SvTAIL(littlestr) && (*bigend == *little))
671 return (char *)bigend; /* bigend is already decremented. */
674 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
675 s = bigend - littlelen;
676 if (s >= big && bigend[-1] == '\n' && *s == *little
677 /* Automatically of length > 2 */
678 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
680 return (char*)s; /* how sweet it is */
683 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
685 return (char*)s + 1; /* how sweet it is */
689 if (!SvVALID(littlestr)) {
690 char * const b = ninstr((char*)big,(char*)bigend,
691 (char*)little, (char*)little + littlelen);
693 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
694 /* Chop \n from littlestr: */
695 s = bigend - littlelen + 1;
697 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
707 if (littlelen > (STRLEN)(bigend - big))
711 register const unsigned char * const table
712 = little + littlelen + PERL_FBM_TABLE_OFFSET;
713 register const unsigned char *oldlittle;
715 --littlelen; /* Last char found by table lookup */
718 little += littlelen; /* last char */
724 if ((tmp = table[*s])) {
725 if ((s += tmp) < bigend)
729 else { /* less expensive than calling strncmp() */
730 register unsigned char * const olds = s;
735 if (*--s == *--little)
737 s = olds + 1; /* here we pay the price for failure */
739 if (s < bigend) /* fake up continue to outer loop */
748 && (BmFLAGS(littlestr) & FBMcf_TAIL)
749 && memEQ((char *)(bigend - littlelen),
750 (char *)(oldlittle - littlelen), littlelen) )
751 return (char*)bigend - littlelen;
756 /* start_shift, end_shift are positive quantities which give offsets
757 of ends of some substring of bigstr.
758 If "last" we want the last occurrence.
759 old_posp is the way of communication between consequent calls if
760 the next call needs to find the .
761 The initial *old_posp should be -1.
763 Note that we take into account SvTAIL, so one can get extra
764 optimizations if _ALL flag is set.
767 /* If SvTAIL is actually due to \Z or \z, this gives false positives
768 if PL_multiline. In fact if !PL_multiline the authoritative answer
769 is not supported yet. */
772 Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
775 register const unsigned char *big;
777 register I32 previous;
779 register const unsigned char *little;
780 register I32 stop_pos;
781 register const unsigned char *littleend;
784 assert(SvTYPE(littlestr) == SVt_PVGV);
785 assert(SvVALID(littlestr));
788 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
789 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
791 if ( BmRARE(littlestr) == '\n'
792 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
793 little = (const unsigned char *)(SvPVX_const(littlestr));
794 littleend = little + SvCUR(littlestr);
801 little = (const unsigned char *)(SvPVX_const(littlestr));
802 littleend = little + SvCUR(littlestr);
804 /* The value of pos we can start at: */
805 previous = BmPREVIOUS(littlestr);
806 big = (const unsigned char *)(SvPVX_const(bigstr));
807 /* The value of pos we can stop at: */
808 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
809 if (previous + start_shift > stop_pos) {
811 stop_pos does not include SvTAIL in the count, so this check is incorrect
812 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
815 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
820 while (pos < previous + start_shift) {
821 if (!(pos += PL_screamnext[pos]))
826 register const unsigned char *s, *x;
827 if (pos >= stop_pos) break;
828 if (big[pos] != first)
830 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
836 if (s == littleend) {
838 if (!last) return (char *)(big+pos);
841 } while ( pos += PL_screamnext[pos] );
843 return (char *)(big+(*old_posp));
845 if (!SvTAIL(littlestr) || (end_shift > 0))
847 /* Ignore the trailing "\n". This code is not microoptimized */
848 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
849 stop_pos = littleend - little; /* Actual littlestr len */
854 && ((stop_pos == 1) ||
855 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
861 Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
863 register const U8 *a = (const U8 *)s1;
864 register const U8 *b = (const U8 *)s2;
868 if (*a != *b && *a != PL_fold[*b])
876 Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
879 register const U8 *a = (const U8 *)s1;
880 register const U8 *b = (const U8 *)s2;
884 if (*a != *b && *a != PL_fold_locale[*b])
891 /* copy a string to a safe spot */
894 =head1 Memory Management
898 Perl's version of C<strdup()>. Returns a pointer to a newly allocated
899 string which is a duplicate of C<pv>. The size of the string is
900 determined by C<strlen()>. The memory allocated for the new string can
901 be freed with the C<Safefree()> function.
907 Perl_savepv(pTHX_ const char *pv)
914 const STRLEN pvlen = strlen(pv)+1;
915 Newx(newaddr, pvlen, char);
916 return (char*)memcpy(newaddr, pv, pvlen);
920 /* same thing but with a known length */
925 Perl's version of what C<strndup()> would be if it existed. Returns a
926 pointer to a newly allocated string which is a duplicate of the first
927 C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
928 the new string can be freed with the C<Safefree()> function.
934 Perl_savepvn(pTHX_ const char *pv, register I32 len)
936 register char *newaddr;
939 Newx(newaddr,len+1,char);
940 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
942 /* might not be null terminated */
944 return (char *) CopyD(pv,newaddr,len,char);
947 return (char *) ZeroD(newaddr,len+1,char);
952 =for apidoc savesharedpv
954 A version of C<savepv()> which allocates the duplicate string in memory
955 which is shared between threads.
960 Perl_savesharedpv(pTHX_ const char *pv)
962 register char *newaddr;
967 pvlen = strlen(pv)+1;
968 newaddr = (char*)PerlMemShared_malloc(pvlen);
970 return write_no_mem();
972 return (char*)memcpy(newaddr, pv, pvlen);
976 =for apidoc savesharedpvn
978 A version of C<savepvn()> which allocates the duplicate string in memory
979 which is shared between threads. (With the specific difference that a NULL
980 pointer is not acceptable)
985 Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
987 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
990 return write_no_mem();
993 return (char*)memcpy(newaddr, pv, len);
999 A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
1000 the passed in SV using C<SvPV()>
1006 Perl_savesvpv(pTHX_ SV *sv)
1009 const char * const pv = SvPV_const(sv, len);
1010 register char *newaddr;
1013 Newx(newaddr,len,char);
1014 return (char *) CopyD(pv,newaddr,len,char);
1018 /* the SV for Perl_form() and mess() is not kept in an arena */
1028 return sv_2mortal(newSVpvs(""));
1033 /* Create as PVMG now, to avoid any upgrading later */
1035 Newxz(any, 1, XPVMG);
1036 SvFLAGS(sv) = SVt_PVMG;
1037 SvANY(sv) = (void*)any;
1039 SvREFCNT(sv) = 1 << 30; /* practically infinite */
1044 #if defined(PERL_IMPLICIT_CONTEXT)
1046 Perl_form_nocontext(const char* pat, ...)
1051 va_start(args, pat);
1052 retval = vform(pat, &args);
1056 #endif /* PERL_IMPLICIT_CONTEXT */
1059 =head1 Miscellaneous Functions
1062 Takes a sprintf-style format pattern and conventional
1063 (non-SV) arguments and returns the formatted string.
1065 (char *) Perl_form(pTHX_ const char* pat, ...)
1067 can be used any place a string (char *) is required:
1069 char * s = Perl_form("%d.%d",major,minor);
1071 Uses a single private buffer so if you want to format several strings you
1072 must explicitly copy the earlier strings away (and free the copies when you
1079 Perl_form(pTHX_ const char* pat, ...)
1083 va_start(args, pat);
1084 retval = vform(pat, &args);
1090 Perl_vform(pTHX_ const char *pat, va_list *args)
1092 SV * const sv = mess_alloc();
1093 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1097 #if defined(PERL_IMPLICIT_CONTEXT)
1099 Perl_mess_nocontext(const char *pat, ...)
1104 va_start(args, pat);
1105 retval = vmess(pat, &args);
1109 #endif /* PERL_IMPLICIT_CONTEXT */
1112 Perl_mess(pTHX_ const char *pat, ...)
1116 va_start(args, pat);
1117 retval = vmess(pat, &args);
1123 S_closest_cop(pTHX_ const COP *cop, const OP *o)
1126 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1128 if (!o || o == PL_op)
1131 if (o->op_flags & OPf_KIDS) {
1133 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1136 /* If the OP_NEXTSTATE has been optimised away we can still use it
1137 * the get the file and line number. */
1139 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
1140 cop = (const COP *)kid;
1142 /* Keep searching, and return when we've found something. */
1144 new_cop = closest_cop(cop, kid);
1150 /* Nothing found. */
1156 Perl_vmess(pTHX_ const char *pat, va_list *args)
1159 SV * const sv = mess_alloc();
1161 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1162 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
1164 * Try and find the file and line for PL_op. This will usually be
1165 * PL_curcop, but it might be a cop that has been optimised away. We
1166 * can try to find such a cop by searching through the optree starting
1167 * from the sibling of PL_curcop.
1170 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
1175 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1176 OutCopFILE(cop), (IV)CopLINE(cop));
1177 /* Seems that GvIO() can be untrustworthy during global destruction. */
1178 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1179 && IoLINES(GvIOp(PL_last_in_gv)))
1181 const bool line_mode = (RsSIMPLE(PL_rs) &&
1182 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
1183 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
1184 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1185 line_mode ? "line" : "chunk",
1186 (IV)IoLINES(GvIOp(PL_last_in_gv)));
1189 sv_catpvs(sv, " during global destruction");
1190 sv_catpvs(sv, ".\n");
1196 Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1202 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1203 && (io = GvIO(PL_stderrgv))
1204 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
1211 SAVESPTR(PL_stderrgv);
1214 PUSHSTACKi(PERLSI_MAGIC);
1218 PUSHs(SvTIED_obj((SV*)io, mg));
1219 PUSHs(sv_2mortal(newSVpvn(message, msglen)));
1221 call_method("PRINT", G_SCALAR);
1229 /* SFIO can really mess with your errno */
1230 const int e = errno;
1232 PerlIO * const serr = Perl_error_log;
1234 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1235 (void)PerlIO_flush(serr);
1242 /* Common code used by vcroak, vdie, vwarn and vwarner */
1245 S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
1251 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1252 /* sv_2cv might call Perl_croak() or Perl_warner() */
1253 SV * const oldhook = *hook;
1260 cv = sv_2cv(oldhook, &stash, &gv, 0);
1262 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1272 if (warn || message) {
1273 msg = newSVpvn(message, msglen);
1274 SvFLAGS(msg) |= utf8;
1282 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
1286 call_sv((SV*)cv, G_DISCARD);
1295 S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1299 const char *message;
1302 SV * const msv = vmess(pat, args);
1303 if (PL_errors && SvCUR(PL_errors)) {
1304 sv_catsv(PL_errors, msv);
1305 message = SvPV_const(PL_errors, *msglen);
1306 SvCUR_set(PL_errors, 0);
1309 message = SvPV_const(msv,*msglen);
1310 *utf8 = SvUTF8(msv);
1316 DEBUG_S(PerlIO_printf(Perl_debug_log,
1317 "%p: die/croak: message = %s\ndiehook = %p\n",
1318 (void*)thr, message, (void*)PL_diehook));
1320 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
1326 Perl_vdie(pTHX_ const char* pat, va_list *args)
1329 const char *message;
1330 const int was_in_eval = PL_in_eval;
1334 DEBUG_S(PerlIO_printf(Perl_debug_log,
1335 "%p: die: curstack = %p, mainstack = %p\n",
1336 (void*)thr, (void*)PL_curstack, (void*)PL_mainstack));
1338 message = vdie_croak_common(pat, args, &msglen, &utf8);
1340 PL_restartop = die_where(message, msglen);
1341 SvFLAGS(ERRSV) |= utf8;
1342 DEBUG_S(PerlIO_printf(Perl_debug_log,
1343 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1344 (void*)thr, (void*)PL_restartop, was_in_eval, (void*)PL_top_env));
1345 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1347 return PL_restartop;
1350 #if defined(PERL_IMPLICIT_CONTEXT)
1352 Perl_die_nocontext(const char* pat, ...)
1357 va_start(args, pat);
1358 o = vdie(pat, &args);
1362 #endif /* PERL_IMPLICIT_CONTEXT */
1365 Perl_die(pTHX_ const char* pat, ...)
1369 va_start(args, pat);
1370 o = vdie(pat, &args);
1376 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1379 const char *message;
1383 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
1386 PL_restartop = die_where(message, msglen);
1387 SvFLAGS(ERRSV) |= utf8;
1391 message = SvPVx_const(ERRSV, msglen);
1393 write_to_stderr(message, msglen);
1397 #if defined(PERL_IMPLICIT_CONTEXT)
1399 Perl_croak_nocontext(const char *pat, ...)
1403 va_start(args, pat);
1408 #endif /* PERL_IMPLICIT_CONTEXT */
1411 =head1 Warning and Dieing
1415 This is the XSUB-writer's interface to Perl's C<die> function.
1416 Normally call this function the same way you call the C C<printf>
1417 function. Calling C<croak> returns control directly to Perl,
1418 sidestepping the normal C order of execution. See C<warn>.
1420 If you want to throw an exception object, assign the object to
1421 C<$@> and then pass C<NULL> to croak():
1423 errsv = get_sv("@", TRUE);
1424 sv_setsv(errsv, exception_object);
1431 Perl_croak(pTHX_ const char *pat, ...)
1434 va_start(args, pat);
1441 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1445 SV * const msv = vmess(pat, args);
1446 const I32 utf8 = SvUTF8(msv);
1447 const char * const message = SvPV_const(msv, msglen);
1450 if (vdie_common(message, msglen, utf8, TRUE))
1454 write_to_stderr(message, msglen);
1457 #if defined(PERL_IMPLICIT_CONTEXT)
1459 Perl_warn_nocontext(const char *pat, ...)
1463 va_start(args, pat);
1467 #endif /* PERL_IMPLICIT_CONTEXT */
1472 This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1473 function the same way you call the C C<printf> function. See C<croak>.
1479 Perl_warn(pTHX_ const char *pat, ...)
1482 va_start(args, pat);
1487 #if defined(PERL_IMPLICIT_CONTEXT)
1489 Perl_warner_nocontext(U32 err, const char *pat, ...)
1493 va_start(args, pat);
1494 vwarner(err, pat, &args);
1497 #endif /* PERL_IMPLICIT_CONTEXT */
1500 Perl_warner(pTHX_ U32 err, const char* pat,...)
1503 va_start(args, pat);
1504 vwarner(err, pat, &args);
1509 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1512 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
1513 SV * const msv = vmess(pat, args);
1515 const char * const message = SvPV_const(msv, msglen);
1516 const I32 utf8 = SvUTF8(msv);
1520 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
1523 PL_restartop = die_where(message, msglen);
1524 SvFLAGS(ERRSV) |= utf8;
1527 write_to_stderr(message, msglen);
1531 Perl_vwarn(aTHX_ pat, args);
1535 /* implements the ckWARN? macros */
1538 Perl_ckwarn(pTHX_ U32 w)
1544 && PL_curcop->cop_warnings != pWARN_NONE
1546 PL_curcop->cop_warnings == pWARN_ALL
1547 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1548 || (unpackWARN2(w) &&
1549 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1550 || (unpackWARN3(w) &&
1551 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1552 || (unpackWARN4(w) &&
1553 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1558 isLEXWARN_off && PL_dowarn & G_WARN_ON
1563 /* implements the ckWARN?_d macro */
1566 Perl_ckwarn_d(pTHX_ U32 w)
1571 || PL_curcop->cop_warnings == pWARN_ALL
1573 PL_curcop->cop_warnings != pWARN_NONE
1575 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1576 || (unpackWARN2(w) &&
1577 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1578 || (unpackWARN3(w) &&
1579 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1580 || (unpackWARN4(w) &&
1581 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1587 /* Set buffer=NULL to get a new one. */
1589 Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
1591 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1592 PERL_UNUSED_CONTEXT;
1595 (specialWARN(buffer) ?
1596 PerlMemShared_malloc(len_wanted) :
1597 PerlMemShared_realloc(buffer, len_wanted));
1599 Copy(bits, (buffer + 1), size, char);
1603 /* since we've already done strlen() for both nam and val
1604 * we can use that info to make things faster than
1605 * sprintf(s, "%s=%s", nam, val)
1607 #define my_setenv_format(s, nam, nlen, val, vlen) \
1608 Copy(nam, s, nlen, char); \
1610 Copy(val, s+(nlen+1), vlen, char); \
1611 *(s+(nlen+1+vlen)) = '\0'
1613 #ifdef USE_ENVIRON_ARRAY
1614 /* VMS' my_setenv() is in vms.c */
1615 #if !defined(WIN32) && !defined(NETWARE)
1617 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1621 /* only parent thread can modify process environment */
1622 if (PL_curinterp == aTHX)
1625 #ifndef PERL_USE_SAFE_PUTENV
1626 if (!PL_use_safe_putenv) {
1627 /* most putenv()s leak, so we manipulate environ directly */
1628 register I32 i=setenv_getix(nam); /* where does it go? */
1631 if (environ == PL_origenviron) { /* need we copy environment? */
1637 while (environ[max])
1639 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1640 for (j=0; j<max; j++) { /* copy environment */
1641 const int len = strlen(environ[j]);
1642 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1643 Copy(environ[j], tmpenv[j], len+1, char);
1646 environ = tmpenv; /* tell exec where it is now */
1649 safesysfree(environ[i]);
1650 while (environ[i]) {
1651 environ[i] = environ[i+1];
1656 if (!environ[i]) { /* does not exist yet */
1657 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1658 environ[i+1] = NULL; /* make sure it's null terminated */
1661 safesysfree(environ[i]);
1665 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1666 /* all that work just for this */
1667 my_setenv_format(environ[i], nam, nlen, val, vlen);
1670 # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
1671 # if defined(HAS_UNSETENV)
1673 (void)unsetenv(nam);
1675 (void)setenv(nam, val, 1);
1677 # else /* ! HAS_UNSETENV */
1678 (void)setenv(nam, val, 1);
1679 # endif /* HAS_UNSETENV */
1681 # if defined(HAS_UNSETENV)
1683 (void)unsetenv(nam);
1685 const int nlen = strlen(nam);
1686 const int vlen = strlen(val);
1687 char * const new_env =
1688 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1689 my_setenv_format(new_env, nam, nlen, val, vlen);
1690 (void)putenv(new_env);
1692 # else /* ! HAS_UNSETENV */
1694 const int nlen = strlen(nam);
1700 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1701 /* all that work just for this */
1702 my_setenv_format(new_env, nam, nlen, val, vlen);
1703 (void)putenv(new_env);
1704 # endif /* HAS_UNSETENV */
1705 # endif /* __CYGWIN__ */
1706 #ifndef PERL_USE_SAFE_PUTENV
1712 #else /* WIN32 || NETWARE */
1715 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1718 register char *envstr;
1719 const int nlen = strlen(nam);
1726 Newx(envstr, nlen+vlen+2, char);
1727 my_setenv_format(envstr, nam, nlen, val, vlen);
1728 (void)PerlEnv_putenv(envstr);
1732 #endif /* WIN32 || NETWARE */
1736 Perl_setenv_getix(pTHX_ const char *nam)
1739 register const I32 len = strlen(nam);
1740 PERL_UNUSED_CONTEXT;
1742 for (i = 0; environ[i]; i++) {
1745 strnicmp(environ[i],nam,len) == 0
1747 strnEQ(environ[i],nam,len)
1749 && environ[i][len] == '=')
1750 break; /* strnEQ must come first to avoid */
1751 } /* potential SEGV's */
1754 #endif /* !PERL_MICRO */
1756 #endif /* !VMS && !EPOC*/
1758 #ifdef UNLINK_ALL_VERSIONS
1760 Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
1764 while (PerlLIO_unlink(f) >= 0)
1766 return retries ? 0 : -1;
1770 /* this is a drop-in replacement for bcopy() */
1771 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1773 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1775 char * const retval = to;
1777 if (from - to >= 0) {
1785 *(--to) = *(--from);
1791 /* this is a drop-in replacement for memset() */
1794 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1796 char * const retval = loc;
1804 /* this is a drop-in replacement for bzero() */
1805 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1807 Perl_my_bzero(register char *loc, register I32 len)
1809 char * const retval = loc;
1817 /* this is a drop-in replacement for memcmp() */
1818 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1820 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1822 register const U8 *a = (const U8 *)s1;
1823 register const U8 *b = (const U8 *)s2;
1827 if ((tmp = *a++ - *b++))
1832 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1835 /* This vsprintf replacement should generally never get used, since
1836 vsprintf was available in both System V and BSD 2.11. (There may
1837 be some cross-compilation or embedded set-ups where it is needed,
1840 If you encounter a problem in this function, it's probably a symptom
1841 that Configure failed to detect your system's vprintf() function.
1842 See the section on "item vsprintf" in the INSTALL file.
1844 This version may compile on systems with BSD-ish <stdio.h>,
1845 but probably won't on others.
1848 #ifdef USE_CHAR_VSPRINTF
1853 vsprintf(char *dest, const char *pat, void *args)
1857 #if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1858 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1859 FILE_cnt(&fakebuf) = 32767;
1861 /* These probably won't compile -- If you really need
1862 this, you'll have to figure out some other method. */
1863 fakebuf._ptr = dest;
1864 fakebuf._cnt = 32767;
1869 fakebuf._flag = _IOWRT|_IOSTRG;
1870 _doprnt(pat, args, &fakebuf); /* what a kludge */
1871 #if defined(STDIO_PTR_LVALUE)
1872 *(FILE_ptr(&fakebuf)++) = '\0';
1874 /* PerlIO has probably #defined away fputc, but we want it here. */
1876 # undef fputc /* XXX Should really restore it later */
1878 (void)fputc('\0', &fakebuf);
1880 #ifdef USE_CHAR_VSPRINTF
1883 return 0; /* perl doesn't use return value */
1887 #endif /* HAS_VPRINTF */
1890 #if BYTEORDER != 0x4321
1892 Perl_my_swap(pTHX_ short s)
1894 #if (BYTEORDER & 1) == 0
1897 result = ((s & 255) << 8) + ((s >> 8) & 255);
1905 Perl_my_htonl(pTHX_ long l)
1909 char c[sizeof(long)];
1912 #if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1913 #if BYTEORDER == 0x12345678
1916 u.c[0] = (l >> 24) & 255;
1917 u.c[1] = (l >> 16) & 255;
1918 u.c[2] = (l >> 8) & 255;
1922 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1923 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1928 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1929 u.c[o & 0xf] = (l >> s) & 255;
1937 Perl_my_ntohl(pTHX_ long l)
1941 char c[sizeof(long)];
1944 #if BYTEORDER == 0x1234
1945 u.c[0] = (l >> 24) & 255;
1946 u.c[1] = (l >> 16) & 255;
1947 u.c[2] = (l >> 8) & 255;
1951 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1952 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1959 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1960 l |= (u.c[o & 0xf] & 255) << s;
1967 #endif /* BYTEORDER != 0x4321 */
1971 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1972 * If these functions are defined,
1973 * the BYTEORDER is neither 0x1234 nor 0x4321.
1974 * However, this is not assumed.
1978 #define HTOLE(name,type) \
1980 name (register type n) \
1984 char c[sizeof(type)]; \
1987 register U32 s = 0; \
1988 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1989 u.c[i] = (n >> s) & 0xFF; \
1994 #define LETOH(name,type) \
1996 name (register type n) \
2000 char c[sizeof(type)]; \
2003 register U32 s = 0; \
2006 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2007 n |= ((type)(u.c[i] & 0xFF)) << s; \
2013 * Big-endian byte order functions.
2016 #define HTOBE(name,type) \
2018 name (register type n) \
2022 char c[sizeof(type)]; \
2025 register U32 s = 8*(sizeof(u.c)-1); \
2026 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2027 u.c[i] = (n >> s) & 0xFF; \
2032 #define BETOH(name,type) \
2034 name (register type n) \
2038 char c[sizeof(type)]; \
2041 register U32 s = 8*(sizeof(u.c)-1); \
2044 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2045 n |= ((type)(u.c[i] & 0xFF)) << s; \
2051 * If we just can't do it...
2054 #define NOT_AVAIL(name,type) \
2056 name (register type n) \
2058 Perl_croak_nocontext(#name "() not available"); \
2059 return n; /* not reached */ \
2063 #if defined(HAS_HTOVS) && !defined(htovs)
2066 #if defined(HAS_HTOVL) && !defined(htovl)
2069 #if defined(HAS_VTOHS) && !defined(vtohs)
2072 #if defined(HAS_VTOHL) && !defined(vtohl)
2076 #ifdef PERL_NEED_MY_HTOLE16
2078 HTOLE(Perl_my_htole16,U16)
2080 NOT_AVAIL(Perl_my_htole16,U16)
2083 #ifdef PERL_NEED_MY_LETOH16
2085 LETOH(Perl_my_letoh16,U16)
2087 NOT_AVAIL(Perl_my_letoh16,U16)
2090 #ifdef PERL_NEED_MY_HTOBE16
2092 HTOBE(Perl_my_htobe16,U16)
2094 NOT_AVAIL(Perl_my_htobe16,U16)
2097 #ifdef PERL_NEED_MY_BETOH16
2099 BETOH(Perl_my_betoh16,U16)
2101 NOT_AVAIL(Perl_my_betoh16,U16)
2105 #ifdef PERL_NEED_MY_HTOLE32
2107 HTOLE(Perl_my_htole32,U32)
2109 NOT_AVAIL(Perl_my_htole32,U32)
2112 #ifdef PERL_NEED_MY_LETOH32
2114 LETOH(Perl_my_letoh32,U32)
2116 NOT_AVAIL(Perl_my_letoh32,U32)
2119 #ifdef PERL_NEED_MY_HTOBE32
2121 HTOBE(Perl_my_htobe32,U32)
2123 NOT_AVAIL(Perl_my_htobe32,U32)
2126 #ifdef PERL_NEED_MY_BETOH32
2128 BETOH(Perl_my_betoh32,U32)
2130 NOT_AVAIL(Perl_my_betoh32,U32)
2134 #ifdef PERL_NEED_MY_HTOLE64
2136 HTOLE(Perl_my_htole64,U64)
2138 NOT_AVAIL(Perl_my_htole64,U64)
2141 #ifdef PERL_NEED_MY_LETOH64
2143 LETOH(Perl_my_letoh64,U64)
2145 NOT_AVAIL(Perl_my_letoh64,U64)
2148 #ifdef PERL_NEED_MY_HTOBE64
2150 HTOBE(Perl_my_htobe64,U64)
2152 NOT_AVAIL(Perl_my_htobe64,U64)
2155 #ifdef PERL_NEED_MY_BETOH64
2157 BETOH(Perl_my_betoh64,U64)
2159 NOT_AVAIL(Perl_my_betoh64,U64)
2163 #ifdef PERL_NEED_MY_HTOLES
2164 HTOLE(Perl_my_htoles,short)
2166 #ifdef PERL_NEED_MY_LETOHS
2167 LETOH(Perl_my_letohs,short)
2169 #ifdef PERL_NEED_MY_HTOBES
2170 HTOBE(Perl_my_htobes,short)
2172 #ifdef PERL_NEED_MY_BETOHS
2173 BETOH(Perl_my_betohs,short)
2176 #ifdef PERL_NEED_MY_HTOLEI
2177 HTOLE(Perl_my_htolei,int)
2179 #ifdef PERL_NEED_MY_LETOHI
2180 LETOH(Perl_my_letohi,int)
2182 #ifdef PERL_NEED_MY_HTOBEI
2183 HTOBE(Perl_my_htobei,int)
2185 #ifdef PERL_NEED_MY_BETOHI
2186 BETOH(Perl_my_betohi,int)
2189 #ifdef PERL_NEED_MY_HTOLEL
2190 HTOLE(Perl_my_htolel,long)
2192 #ifdef PERL_NEED_MY_LETOHL
2193 LETOH(Perl_my_letohl,long)
2195 #ifdef PERL_NEED_MY_HTOBEL
2196 HTOBE(Perl_my_htobel,long)
2198 #ifdef PERL_NEED_MY_BETOHL
2199 BETOH(Perl_my_betohl,long)
2203 Perl_my_swabn(void *ptr, int n)
2205 register char *s = (char *)ptr;
2206 register char *e = s + (n-1);
2209 for (n /= 2; n > 0; s++, e--, n--) {
2217 Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
2219 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
2222 register I32 This, that;
2228 PERL_FLUSHALL_FOR_CHILD;
2229 This = (*mode == 'w');
2233 taint_proper("Insecure %s%s", "EXEC");
2235 if (PerlProc_pipe(p) < 0)
2237 /* Try for another pipe pair for error return */
2238 if (PerlProc_pipe(pp) >= 0)
2240 while ((pid = PerlProc_fork()) < 0) {
2241 if (errno != EAGAIN) {
2242 PerlLIO_close(p[This]);
2243 PerlLIO_close(p[that]);
2245 PerlLIO_close(pp[0]);
2246 PerlLIO_close(pp[1]);
2258 /* Close parent's end of error status pipe (if any) */
2260 PerlLIO_close(pp[0]);
2261 #if defined(HAS_FCNTL) && defined(F_SETFD)
2262 /* Close error pipe automatically if exec works */
2263 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2266 /* Now dup our end of _the_ pipe to right position */
2267 if (p[THIS] != (*mode == 'r')) {
2268 PerlLIO_dup2(p[THIS], *mode == 'r');
2269 PerlLIO_close(p[THIS]);
2270 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2271 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2274 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2275 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2276 /* No automatic close - do it by hand */
2283 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2289 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
2295 do_execfree(); /* free any memory malloced by child on fork */
2297 PerlLIO_close(pp[1]);
2298 /* Keep the lower of the two fd numbers */
2299 if (p[that] < p[This]) {
2300 PerlLIO_dup2(p[This], p[that]);
2301 PerlLIO_close(p[This]);
2305 PerlLIO_close(p[that]); /* close child's end of pipe */
2308 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2310 SvUPGRADE(sv,SVt_IV);
2312 PL_forkprocess = pid;
2313 /* If we managed to get status pipe check for exec fail */
2314 if (did_pipes && pid > 0) {
2319 while (n < sizeof(int)) {
2320 n1 = PerlLIO_read(pp[0],
2321 (void*)(((char*)&errkid)+n),
2327 PerlLIO_close(pp[0]);
2329 if (n) { /* Error */
2331 PerlLIO_close(p[This]);
2332 if (n != sizeof(int))
2333 Perl_croak(aTHX_ "panic: kid popen errno read");
2335 pid2 = wait4pid(pid, &status, 0);
2336 } while (pid2 == -1 && errno == EINTR);
2337 errno = errkid; /* Propagate errno from kid */
2342 PerlLIO_close(pp[0]);
2343 return PerlIO_fdopen(p[This], mode);
2345 # ifdef OS2 /* Same, without fork()ing and all extra overhead... */
2346 return my_syspopen4(aTHX_ Nullch, mode, n, args);
2348 Perl_croak(aTHX_ "List form of piped open not implemented");
2349 return (PerlIO *) NULL;
2354 /* VMS' my_popen() is in VMS.c, same with OS/2. */
2355 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2357 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2361 register I32 This, that;
2364 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
2368 PERL_FLUSHALL_FOR_CHILD;
2371 return my_syspopen(aTHX_ cmd,mode);
2374 This = (*mode == 'w');
2376 if (doexec && PL_tainting) {
2378 taint_proper("Insecure %s%s", "EXEC");
2380 if (PerlProc_pipe(p) < 0)
2382 if (doexec && PerlProc_pipe(pp) >= 0)
2384 while ((pid = PerlProc_fork()) < 0) {
2385 if (errno != EAGAIN) {
2386 PerlLIO_close(p[This]);
2387 PerlLIO_close(p[that]);
2389 PerlLIO_close(pp[0]);
2390 PerlLIO_close(pp[1]);
2393 Perl_croak(aTHX_ "Can't fork");
2406 PerlLIO_close(pp[0]);
2407 #if defined(HAS_FCNTL) && defined(F_SETFD)
2408 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2411 if (p[THIS] != (*mode == 'r')) {
2412 PerlLIO_dup2(p[THIS], *mode == 'r');
2413 PerlLIO_close(p[THIS]);
2414 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2415 PerlLIO_close(p[THAT]);
2418 PerlLIO_close(p[THAT]);
2421 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2428 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2433 /* may or may not use the shell */
2434 do_exec3(cmd, pp[1], did_pipes);
2437 #endif /* defined OS2 */
2439 #ifdef PERLIO_USING_CRLF
2440 /* Since we circumvent IO layers when we manipulate low-level
2441 filedescriptors directly, need to manually switch to the
2442 default, binary, low-level mode; see PerlIOBuf_open(). */
2443 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2446 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
2447 SvREADONLY_off(GvSV(tmpgv));
2448 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
2449 SvREADONLY_on(GvSV(tmpgv));
2451 #ifdef THREADS_HAVE_PIDS
2452 PL_ppid = (IV)getppid();
2455 #ifdef PERL_USES_PL_PIDSTATUS
2456 hv_clear(PL_pidstatus); /* we have no children */
2462 do_execfree(); /* free any memory malloced by child on vfork */
2464 PerlLIO_close(pp[1]);
2465 if (p[that] < p[This]) {
2466 PerlLIO_dup2(p[This], p[that]);
2467 PerlLIO_close(p[This]);
2471 PerlLIO_close(p[that]);
2474 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2476 SvUPGRADE(sv,SVt_IV);
2478 PL_forkprocess = pid;
2479 if (did_pipes && pid > 0) {
2484 while (n < sizeof(int)) {
2485 n1 = PerlLIO_read(pp[0],
2486 (void*)(((char*)&errkid)+n),
2492 PerlLIO_close(pp[0]);
2494 if (n) { /* Error */
2496 PerlLIO_close(p[This]);
2497 if (n != sizeof(int))
2498 Perl_croak(aTHX_ "panic: kid popen errno read");
2500 pid2 = wait4pid(pid, &status, 0);
2501 } while (pid2 == -1 && errno == EINTR);
2502 errno = errkid; /* Propagate errno from kid */
2507 PerlLIO_close(pp[0]);
2508 return PerlIO_fdopen(p[This], mode);
2511 #if defined(atarist) || defined(EPOC)
2514 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2516 PERL_FLUSHALL_FOR_CHILD;
2517 /* Call system's popen() to get a FILE *, then import it.
2518 used 0 for 2nd parameter to PerlIO_importFILE;
2521 return PerlIO_importFILE(popen(cmd, mode), 0);
2525 FILE *djgpp_popen();
2527 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2529 PERL_FLUSHALL_FOR_CHILD;
2530 /* Call system's popen() to get a FILE *, then import it.
2531 used 0 for 2nd parameter to PerlIO_importFILE;
2534 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2537 #if defined(__LIBCATAMOUNT__)
2539 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2547 #endif /* !DOSISH */
2549 /* this is called in parent before the fork() */
2551 Perl_atfork_lock(void)
2554 #if defined(USE_ITHREADS)
2555 /* locks must be held in locking order (if any) */
2557 MUTEX_LOCK(&PL_malloc_mutex);
2563 /* this is called in both parent and child after the fork() */
2565 Perl_atfork_unlock(void)
2568 #if defined(USE_ITHREADS)
2569 /* locks must be released in same order as in atfork_lock() */
2571 MUTEX_UNLOCK(&PL_malloc_mutex);
2580 #if defined(HAS_FORK)
2582 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2587 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2588 * handlers elsewhere in the code */
2593 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2594 Perl_croak_nocontext("fork() not available");
2596 #endif /* HAS_FORK */
2601 Perl_dump_fds(pTHX_ char *s)
2606 PerlIO_printf(Perl_debug_log,"%s", s);
2607 for (fd = 0; fd < 32; fd++) {
2608 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2609 PerlIO_printf(Perl_debug_log," %d",fd);
2611 PerlIO_printf(Perl_debug_log,"\n");
2614 #endif /* DUMP_FDS */
2618 dup2(int oldfd, int newfd)
2620 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2623 PerlLIO_close(newfd);
2624 return fcntl(oldfd, F_DUPFD, newfd);
2626 #define DUP2_MAX_FDS 256
2627 int fdtmp[DUP2_MAX_FDS];
2633 PerlLIO_close(newfd);
2634 /* good enough for low fd's... */
2635 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2636 if (fdx >= DUP2_MAX_FDS) {
2644 PerlLIO_close(fdtmp[--fdx]);
2651 #ifdef HAS_SIGACTION
2653 #ifdef MACOS_TRADITIONAL
2654 /* We don't want restart behavior on MacOS */
2659 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2662 struct sigaction act, oact;
2665 /* only "parent" interpreter can diddle signals */
2666 if (PL_curinterp != aTHX)
2667 return (Sighandler_t) SIG_ERR;
2670 act.sa_handler = (void(*)(int))handler;
2671 sigemptyset(&act.sa_mask);
2674 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2675 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2677 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2678 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2679 act.sa_flags |= SA_NOCLDWAIT;
2681 if (sigaction(signo, &act, &oact) == -1)
2682 return (Sighandler_t) SIG_ERR;
2684 return (Sighandler_t) oact.sa_handler;
2688 Perl_rsignal_state(pTHX_ int signo)
2690 struct sigaction oact;
2691 PERL_UNUSED_CONTEXT;
2693 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2694 return (Sighandler_t) SIG_ERR;
2696 return (Sighandler_t) oact.sa_handler;
2700 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2703 struct sigaction act;
2706 /* only "parent" interpreter can diddle signals */
2707 if (PL_curinterp != aTHX)
2711 act.sa_handler = (void(*)(int))handler;
2712 sigemptyset(&act.sa_mask);
2715 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2716 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2718 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2719 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2720 act.sa_flags |= SA_NOCLDWAIT;
2722 return sigaction(signo, &act, save);
2726 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2730 /* only "parent" interpreter can diddle signals */
2731 if (PL_curinterp != aTHX)
2735 return sigaction(signo, save, (struct sigaction *)NULL);
2738 #else /* !HAS_SIGACTION */
2741 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2743 #if defined(USE_ITHREADS) && !defined(WIN32)
2744 /* only "parent" interpreter can diddle signals */
2745 if (PL_curinterp != aTHX)
2746 return (Sighandler_t) SIG_ERR;
2749 return PerlProc_signal(signo, handler);
2760 Perl_rsignal_state(pTHX_ int signo)
2763 Sighandler_t oldsig;
2765 #if defined(USE_ITHREADS) && !defined(WIN32)
2766 /* only "parent" interpreter can diddle signals */
2767 if (PL_curinterp != aTHX)
2768 return (Sighandler_t) SIG_ERR;
2772 oldsig = PerlProc_signal(signo, sig_trap);
2773 PerlProc_signal(signo, oldsig);
2775 PerlProc_kill(PerlProc_getpid(), signo);
2780 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2782 #if defined(USE_ITHREADS) && !defined(WIN32)
2783 /* only "parent" interpreter can diddle signals */
2784 if (PL_curinterp != aTHX)
2787 *save = PerlProc_signal(signo, handler);
2788 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
2792 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2794 #if defined(USE_ITHREADS) && !defined(WIN32)
2795 /* only "parent" interpreter can diddle signals */
2796 if (PL_curinterp != aTHX)
2799 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
2802 #endif /* !HAS_SIGACTION */
2803 #endif /* !PERL_MICRO */
2805 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2806 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2808 Perl_my_pclose(pTHX_ PerlIO *ptr)
2811 Sigsave_t hstat, istat, qstat;
2817 int saved_errno = 0;
2819 int saved_win32_errno;
2823 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2825 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2827 *svp = &PL_sv_undef;
2829 if (pid == -1) { /* Opened by popen. */
2830 return my_syspclose(ptr);
2833 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2834 saved_errno = errno;
2836 saved_win32_errno = GetLastError();
2840 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2843 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2844 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2845 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
2848 pid2 = wait4pid(pid, &status, 0);
2849 } while (pid2 == -1 && errno == EINTR);
2851 rsignal_restore(SIGHUP, &hstat);
2852 rsignal_restore(SIGINT, &istat);
2853 rsignal_restore(SIGQUIT, &qstat);
2856 SETERRNO(saved_errno, 0);
2859 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2862 #if defined(__LIBCATAMOUNT__)
2864 Perl_my_pclose(pTHX_ PerlIO *ptr)
2869 #endif /* !DOSISH */
2871 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2873 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2879 #ifdef PERL_USES_PL_PIDSTATUS
2882 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2883 pid, rather than a string form. */
2884 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
2885 if (svp && *svp != &PL_sv_undef) {
2886 *statusp = SvIVX(*svp);
2887 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2895 hv_iterinit(PL_pidstatus);
2896 if ((entry = hv_iternext(PL_pidstatus))) {
2897 SV * const sv = hv_iterval(PL_pidstatus,entry);
2899 const char * const spid = hv_iterkey(entry,&len);
2901 assert (len == sizeof(Pid_t));
2902 memcpy((char *)&pid, spid, len);
2903 *statusp = SvIVX(sv);
2904 /* The hash iterator is currently on this entry, so simply
2905 calling hv_delete would trigger the lazy delete, which on
2906 aggregate does more work, beacuse next call to hv_iterinit()
2907 would spot the flag, and have to call the delete routine,
2908 while in the meantime any new entries can't re-use that
2910 hv_iterinit(PL_pidstatus);
2911 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
2918 # ifdef HAS_WAITPID_RUNTIME
2919 if (!HAS_WAITPID_RUNTIME)
2922 result = PerlProc_waitpid(pid,statusp,flags);
2925 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2926 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
2929 #ifdef PERL_USES_PL_PIDSTATUS
2930 #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
2935 Perl_croak(aTHX_ "Can't do waitpid with flags");
2937 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2938 pidgone(result,*statusp);
2944 #if defined(HAS_WAITPID) || defined(HAS_WAIT4)
2947 if (result < 0 && errno == EINTR) {
2952 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2954 #ifdef PERL_USES_PL_PIDSTATUS
2956 Perl_pidgone(pTHX_ Pid_t pid, int status)
2960 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
2961 SvUPGRADE(sv,SVt_IV);
2962 SvIV_set(sv, status);
2967 #if defined(atarist) || defined(OS2) || defined(EPOC)
2970 int /* Cannot prototype with I32
2972 my_syspclose(PerlIO *ptr)
2975 Perl_my_pclose(pTHX_ PerlIO *ptr)
2978 /* Needs work for PerlIO ! */
2979 FILE * const f = PerlIO_findFILE(ptr);
2980 const I32 result = pclose(f);
2981 PerlIO_releaseFILE(ptr,f);
2989 Perl_my_pclose(pTHX_ PerlIO *ptr)
2991 /* Needs work for PerlIO ! */
2992 FILE * const f = PerlIO_findFILE(ptr);
2993 I32 result = djgpp_pclose(f);
2994 result = (result << 8) & 0xff00;
2995 PerlIO_releaseFILE(ptr,f);
3001 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
3004 register const char * const frombase = from;
3005 PERL_UNUSED_CONTEXT;
3008 register const char c = *from;
3013 while (count-- > 0) {
3014 for (todo = len; todo > 0; todo--) {
3023 Perl_same_dirent(pTHX_ const char *a, const char *b)
3025 char *fa = strrchr(a,'/');
3026 char *fb = strrchr(b,'/');
3029 SV * const tmpsv = sv_newmortal();
3042 sv_setpvn(tmpsv, ".", 1);
3044 sv_setpvn(tmpsv, a, fa - a);
3045 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
3048 sv_setpvn(tmpsv, ".", 1);
3050 sv_setpvn(tmpsv, b, fb - b);
3051 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
3053 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3054 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3056 #endif /* !HAS_RENAME */
3059 Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3060 const char *const *const search_ext, I32 flags)
3063 const char *xfound = NULL;
3064 char *xfailed = NULL;
3065 char tmpbuf[MAXPATHLEN];
3070 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3071 # define SEARCH_EXTS ".bat", ".cmd", NULL
3072 # define MAX_EXT_LEN 4
3075 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3076 # define MAX_EXT_LEN 4
3079 # define SEARCH_EXTS ".pl", ".com", NULL
3080 # define MAX_EXT_LEN 4
3082 /* additional extensions to try in each dir if scriptname not found */
3084 static const char *const exts[] = { SEARCH_EXTS };
3085 const char *const *const ext = search_ext ? search_ext : exts;
3086 int extidx = 0, i = 0;
3087 const char *curext = NULL;
3089 PERL_UNUSED_ARG(search_ext);
3090 # define MAX_EXT_LEN 0
3094 * If dosearch is true and if scriptname does not contain path
3095 * delimiters, search the PATH for scriptname.
3097 * If SEARCH_EXTS is also defined, will look for each
3098 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3099 * while searching the PATH.
3101 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3102 * proceeds as follows:
3103 * If DOSISH or VMSISH:
3104 * + look for ./scriptname{,.foo,.bar}
3105 * + search the PATH for scriptname{,.foo,.bar}
3108 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3109 * this will not look in '.' if it's not in the PATH)
3114 # ifdef ALWAYS_DEFTYPES
3115 len = strlen(scriptname);
3116 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3117 int idx = 0, deftypes = 1;
3120 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
3123 int idx = 0, deftypes = 1;
3126 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
3128 /* The first time through, just add SEARCH_EXTS to whatever we
3129 * already have, so we can check for default file types. */
3131 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
3137 if ((strlen(tmpbuf) + strlen(scriptname)
3138 + MAX_EXT_LEN) >= sizeof tmpbuf)
3139 continue; /* don't search dir with too-long name */
3140 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
3144 if (strEQ(scriptname, "-"))
3146 if (dosearch) { /* Look in '.' first. */
3147 const char *cur = scriptname;
3149 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3151 if (strEQ(ext[i++],curext)) {
3152 extidx = -1; /* already has an ext */
3157 DEBUG_p(PerlIO_printf(Perl_debug_log,
3158 "Looking for %s\n",cur));
3159 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3160 && !S_ISDIR(PL_statbuf.st_mode)) {
3168 if (cur == scriptname) {
3169 len = strlen(scriptname);
3170 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
3172 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3175 } while (extidx >= 0 && ext[extidx] /* try an extension? */
3176 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
3181 #ifdef MACOS_TRADITIONAL
3182 if (dosearch && !strchr(scriptname, ':') &&
3183 (s = PerlEnv_getenv("Commands")))
3185 if (dosearch && !strchr(scriptname, '/')
3187 && !strchr(scriptname, '\\')
3189 && (s = PerlEnv_getenv("PATH")))
3194 bufend = s + strlen(s);
3195 while (s < bufend) {
3196 #ifdef MACOS_TRADITIONAL
3197 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3201 #if defined(atarist) || defined(DOSISH)
3206 && *s != ';'; len++, s++) {
3207 if (len < sizeof tmpbuf)
3210 if (len < sizeof tmpbuf)
3212 #else /* ! (atarist || DOSISH) */
3213 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3216 #endif /* ! (atarist || DOSISH) */
3217 #endif /* MACOS_TRADITIONAL */
3220 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
3221 continue; /* don't search dir with too-long name */
3222 #ifdef MACOS_TRADITIONAL
3223 if (len && tmpbuf[len - 1] != ':')
3224 tmpbuf[len++] = ':';
3227 # if defined(atarist) || defined(__MINT__) || defined(DOSISH)
3228 && tmpbuf[len - 1] != '/'
3229 && tmpbuf[len - 1] != '\\'
3232 tmpbuf[len++] = '/';
3233 if (len == 2 && tmpbuf[0] == '.')
3236 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3240 len = strlen(tmpbuf);
3241 if (extidx > 0) /* reset after previous loop */
3245 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3246 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
3247 if (S_ISDIR(PL_statbuf.st_mode)) {
3251 } while ( retval < 0 /* not there */
3252 && extidx>=0 && ext[extidx] /* try an extension? */
3253 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
3258 if (S_ISREG(PL_statbuf.st_mode)
3259 && cando(S_IRUSR,TRUE,&PL_statbuf)
3260 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3261 && cando(S_IXUSR,TRUE,&PL_statbuf)
3265 xfound = tmpbuf; /* bingo! */
3269 xfailed = savepv(tmpbuf);
3272 if (!xfound && !seen_dot && !xfailed &&
3273 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
3274 || S_ISDIR(PL_statbuf.st_mode)))
3276 seen_dot = 1; /* Disable message. */
3278 if (flags & 1) { /* do or die? */
3279 Perl_croak(aTHX_ "Can't %s %s%s%s",
3280 (xfailed ? "execute" : "find"),
3281 (xfailed ? xfailed : scriptname),
3282 (xfailed ? "" : " on PATH"),
3283 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3288 scriptname = xfound;
3290 return (scriptname ? savepv(scriptname) : NULL);
3293 #ifndef PERL_GET_CONTEXT_DEFINED
3296 Perl_get_context(void)
3299 #if defined(USE_ITHREADS)
3300 # ifdef OLD_PTHREADS_API
3302 if (pthread_getspecific(PL_thr_key, &t))
3303 Perl_croak_nocontext("panic: pthread_getspecific");
3306 # ifdef I_MACH_CTHREADS
3307 return (void*)cthread_data(cthread_self());
3309 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3318 Perl_set_context(void *t)
3321 #if defined(USE_ITHREADS)
3322 # ifdef I_MACH_CTHREADS
3323 cthread_set_data(cthread_self(), t);
3325 if (pthread_setspecific(PL_thr_key, t))
3326 Perl_croak_nocontext("panic: pthread_setspecific");
3333 #endif /* !PERL_GET_CONTEXT_DEFINED */
3335 #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
3344 Perl_get_op_names(pTHX)
3346 PERL_UNUSED_CONTEXT;
3347 return (char **)PL_op_name;
3351 Perl_get_op_descs(pTHX)
3353 PERL_UNUSED_CONTEXT;
3354 return (char **)PL_op_desc;
3358 Perl_get_no_modify(pTHX)
3360 PERL_UNUSED_CONTEXT;
3361 return PL_no_modify;
3365 Perl_get_opargs(pTHX)
3367 PERL_UNUSED_CONTEXT;
3368 return (U32 *)PL_opargs;
3372 Perl_get_ppaddr(pTHX)
3375 PERL_UNUSED_CONTEXT;
3376 return (PPADDR_t*)PL_ppaddr;
3379 #ifndef HAS_GETENV_LEN
3381 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
3383 char * const env_trans = PerlEnv_getenv(env_elem);
3384 PERL_UNUSED_CONTEXT;
3386 *len = strlen(env_trans);
3393 Perl_get_vtbl(pTHX_ int vtbl_id)
3395 const MGVTBL* result;
3396 PERL_UNUSED_CONTEXT;
3400 result = &PL_vtbl_sv;
3403 result = &PL_vtbl_env;
3405 case want_vtbl_envelem:
3406 result = &PL_vtbl_envelem;
3409 result = &PL_vtbl_sig;
3411 case want_vtbl_sigelem:
3412 result = &PL_vtbl_sigelem;
3414 case want_vtbl_pack:
3415 result = &PL_vtbl_pack;
3417 case want_vtbl_packelem:
3418 result = &PL_vtbl_packelem;
3420 case want_vtbl_dbline:
3421 result = &PL_vtbl_dbline;
3424 result = &PL_vtbl_isa;
3426 case want_vtbl_isaelem:
3427 result = &PL_vtbl_isaelem;
3429 case want_vtbl_arylen:
3430 result = &PL_vtbl_arylen;
3432 case want_vtbl_mglob:
3433 result = &PL_vtbl_mglob;
3435 case want_vtbl_nkeys:
3436 result = &PL_vtbl_nkeys;
3438 case want_vtbl_taint:
3439 result = &PL_vtbl_taint;
3441 case want_vtbl_substr:
3442 result = &PL_vtbl_substr;
3445 result = &PL_vtbl_vec;
3448 result = &PL_vtbl_pos;
3451 result = &PL_vtbl_bm;
3454 result = &PL_vtbl_fm;
3456 case want_vtbl_uvar:
3457 result = &PL_vtbl_uvar;
3459 case want_vtbl_defelem:
3460 result = &PL_vtbl_defelem;
3462 case want_vtbl_regexp:
3463 result = &PL_vtbl_regexp;
3465 case want_vtbl_regdata:
3466 result = &PL_vtbl_regdata;
3468 case want_vtbl_regdatum:
3469 result = &PL_vtbl_regdatum;
3471 #ifdef USE_LOCALE_COLLATE
3472 case want_vtbl_collxfrm:
3473 result = &PL_vtbl_collxfrm;
3476 case want_vtbl_amagic:
3477 result = &PL_vtbl_amagic;
3479 case want_vtbl_amagicelem:
3480 result = &PL_vtbl_amagicelem;
3482 case want_vtbl_backref:
3483 result = &PL_vtbl_backref;
3485 case want_vtbl_utf8:
3486 result = &PL_vtbl_utf8;
3492 return (MGVTBL*)result;
3496 Perl_my_fflush_all(pTHX)
3498 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3499 return PerlIO_flush(NULL);
3501 # if defined(HAS__FWALK)
3502 extern int fflush(FILE *);
3503 /* undocumented, unprototyped, but very useful BSDism */
3504 extern void _fwalk(int (*)(FILE *));
3508 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3510 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3511 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3513 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3514 open_max = sysconf(_SC_OPEN_MAX);
3517 open_max = FOPEN_MAX;
3520 open_max = OPEN_MAX;
3531 for (i = 0; i < open_max; i++)
3532 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3533 STDIO_STREAM_ARRAY[i]._file < open_max &&
3534 STDIO_STREAM_ARRAY[i]._flag)
3535 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3539 SETERRNO(EBADF,RMS_IFI);
3546 Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
3548 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
3550 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3551 if (ckWARN(WARN_IO)) {
3552 const char * const direction =
3553 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3555 Perl_warner(aTHX_ packWARN(WARN_IO),
3556 "Filehandle %s opened only for %sput",
3559 Perl_warner(aTHX_ packWARN(WARN_IO),
3560 "Filehandle opened only for %sput", direction);
3567 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3569 warn_type = WARN_CLOSED;
3573 warn_type = WARN_UNOPENED;
3576 if (ckWARN(warn_type)) {
3577 const char * const pars =
3578 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
3579 const char * const func =
3581 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3582 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3583 op < 0 ? "" : /* handle phoney cases */
3585 const char * const type =
3587 (OP_IS_SOCKET(op) ||
3588 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3589 "socket" : "filehandle");
3590 if (name && *name) {
3591 Perl_warner(aTHX_ packWARN(warn_type),
3592 "%s%s on %s %s %s", func, pars, vile, type, name);
3593 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3595 aTHX_ packWARN(warn_type),
3596 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3601 Perl_warner(aTHX_ packWARN(warn_type),
3602 "%s%s on %s %s", func, pars, vile, type);
3603 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3605 aTHX_ packWARN(warn_type),
3606 "\t(Are you trying to call %s%s on dirhandle?)\n",
3615 /* in ASCII order, not that it matters */
3616 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3619 Perl_ebcdic_control(pTHX_ int ch)
3627 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3628 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3631 if (ctlp == controllablechars)
3632 return('\177'); /* DEL */
3634 return((unsigned char)(ctlp - controllablechars - 1));
3635 } else { /* Want uncontrol */
3636 if (ch == '\177' || ch == -1)
3638 else if (ch == '\157')
3640 else if (ch == '\174')
3642 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3644 else if (ch == '\155')
3646 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3647 return(controllablechars[ch+1]);
3649 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3654 /* To workaround core dumps from the uninitialised tm_zone we get the
3655 * system to give us a reasonable struct to copy. This fix means that
3656 * strftime uses the tm_zone and tm_gmtoff values returned by
3657 * localtime(time()). That should give the desired result most of the
3658 * time. But probably not always!
3660 * This does not address tzname aspects of NETaa14816.
3665 # ifndef STRUCT_TM_HASZONE
3666 # define STRUCT_TM_HASZONE
3670 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3671 # ifndef HAS_TM_TM_ZONE
3672 # define HAS_TM_TM_ZONE
3677 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3679 #ifdef HAS_TM_TM_ZONE
3681 const struct tm* my_tm;
3683 my_tm = localtime(&now);
3685 Copy(my_tm, ptm, 1, struct tm);
3687 PERL_UNUSED_ARG(ptm);
3692 * mini_mktime - normalise struct tm values without the localtime()
3693 * semantics (and overhead) of mktime().
3696 Perl_mini_mktime(pTHX_ struct tm *ptm)
3700 int month, mday, year, jday;
3701 int odd_cent, odd_year;
3702 PERL_UNUSED_CONTEXT;
3704 #define DAYS_PER_YEAR 365
3705 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3706 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3707 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3708 #define SECS_PER_HOUR (60*60)
3709 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3710 /* parentheses deliberately absent on these two, otherwise they don't work */
3711 #define MONTH_TO_DAYS 153/5
3712 #define DAYS_TO_MONTH 5/153
3713 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3714 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3715 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3716 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3719 * Year/day algorithm notes:
3721 * With a suitable offset for numeric value of the month, one can find
3722 * an offset into the year by considering months to have 30.6 (153/5) days,
3723 * using integer arithmetic (i.e., with truncation). To avoid too much
3724 * messing about with leap days, we consider January and February to be
3725 * the 13th and 14th month of the previous year. After that transformation,
3726 * we need the month index we use to be high by 1 from 'normal human' usage,
3727 * so the month index values we use run from 4 through 15.
3729 * Given that, and the rules for the Gregorian calendar (leap years are those
3730 * divisible by 4 unless also divisible by 100, when they must be divisible
3731 * by 400 instead), we can simply calculate the number of days since some
3732 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3733 * the days we derive from our month index, and adding in the day of the
3734 * month. The value used here is not adjusted for the actual origin which
3735 * it normally would use (1 January A.D. 1), since we're not exposing it.
3736 * We're only building the value so we can turn around and get the
3737 * normalised values for the year, month, day-of-month, and day-of-year.
3739 * For going backward, we need to bias the value we're using so that we find
3740 * the right year value. (Basically, we don't want the contribution of
3741 * March 1st to the number to apply while deriving the year). Having done
3742 * that, we 'count up' the contribution to the year number by accounting for
3743 * full quadracenturies (400-year periods) with their extra leap days, plus
3744 * the contribution from full centuries (to avoid counting in the lost leap
3745 * days), plus the contribution from full quad-years (to count in the normal
3746 * leap days), plus the leftover contribution from any non-leap years.
3747 * At this point, if we were working with an actual leap day, we'll have 0
3748 * days left over. This is also true for March 1st, however. So, we have
3749 * to special-case that result, and (earlier) keep track of the 'odd'
3750 * century and year contributions. If we got 4 extra centuries in a qcent,
3751 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3752 * Otherwise, we add back in the earlier bias we removed (the 123 from
3753 * figuring in March 1st), find the month index (integer division by 30.6),
3754 * and the remainder is the day-of-month. We then have to convert back to
3755 * 'real' months (including fixing January and February from being 14/15 in
3756 * the previous year to being in the proper year). After that, to get
3757 * tm_yday, we work with the normalised year and get a new yearday value for
3758 * January 1st, which we subtract from the yearday value we had earlier,
3759 * representing the date we've re-built. This is done from January 1
3760 * because tm_yday is 0-origin.
3762 * Since POSIX time routines are only guaranteed to work for times since the
3763 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3764 * applies Gregorian calendar rules even to dates before the 16th century
3765 * doesn't bother me. Besides, you'd need cultural context for a given
3766 * date to know whether it was Julian or Gregorian calendar, and that's
3767 * outside the scope for this routine. Since we convert back based on the
3768 * same rules we used to build the yearday, you'll only get strange results
3769 * for input which needed normalising, or for the 'odd' century years which
3770 * were leap years in the Julian calander but not in the Gregorian one.
3771 * I can live with that.
3773 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3774 * that's still outside the scope for POSIX time manipulation, so I don't
3778 year = 1900 + ptm->tm_year;
3779 month = ptm->tm_mon;
3780 mday = ptm->tm_mday;
3781 /* allow given yday with no month & mday to dominate the result */
3782 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3785 jday = 1 + ptm->tm_yday;
3794 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3795 yearday += month*MONTH_TO_DAYS + mday + jday;
3797 * Note that we don't know when leap-seconds were or will be,
3798 * so we have to trust the user if we get something which looks
3799 * like a sensible leap-second. Wild values for seconds will
3800 * be rationalised, however.
3802 if ((unsigned) ptm->tm_sec <= 60) {
3809 secs += 60 * ptm->tm_min;
3810 secs += SECS_PER_HOUR * ptm->tm_hour;
3812 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3813 /* got negative remainder, but need positive time */
3814 /* back off an extra day to compensate */
3815 yearday += (secs/SECS_PER_DAY)-1;
3816 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3819 yearday += (secs/SECS_PER_DAY);
3820 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3823 else if (secs >= SECS_PER_DAY) {
3824 yearday += (secs/SECS_PER_DAY);
3825 secs %= SECS_PER_DAY;
3827 ptm->tm_hour = secs/SECS_PER_HOUR;
3828 secs %= SECS_PER_HOUR;
3829 ptm->tm_min = secs/60;
3831 ptm->tm_sec += secs;
3832 /* done with time of day effects */
3834 * The algorithm for yearday has (so far) left it high by 428.
3835 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3836 * bias it by 123 while trying to figure out what year it
3837 * really represents. Even with this tweak, the reverse
3838 * translation fails for years before A.D. 0001.
3839 * It would still fail for Feb 29, but we catch that one below.
3841 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3842 yearday -= YEAR_ADJUST;
3843 year = (yearday / DAYS_PER_QCENT) * 400;
3844 yearday %= DAYS_PER_QCENT;
3845 odd_cent = yearday / DAYS_PER_CENT;
3846 year += odd_cent * 100;
3847 yearday %= DAYS_PER_CENT;
3848 year += (yearday / DAYS_PER_QYEAR) * 4;
3849 yearday %= DAYS_PER_QYEAR;
3850 odd_year = yearday / DAYS_PER_YEAR;
3852 yearday %= DAYS_PER_YEAR;
3853 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3858 yearday += YEAR_ADJUST; /* recover March 1st crock */
3859 month = yearday*DAYS_TO_MONTH;
3860 yearday -= month*MONTH_TO_DAYS;
3861 /* recover other leap-year adjustment */
3870 ptm->tm_year = year - 1900;
3872 ptm->tm_mday = yearday;
3873 ptm->tm_mon = month;
3877 ptm->tm_mon = month - 1;
3879 /* re-build yearday based on Jan 1 to get tm_yday */
3881 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3882 yearday += 14*MONTH_TO_DAYS + 1;
3883 ptm->tm_yday = jday - yearday;
3884 /* fix tm_wday if not overridden by caller */
3885 if ((unsigned)ptm->tm_wday > 6)
3886 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3890 Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
3898 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3901 mytm.tm_hour = hour;
3902 mytm.tm_mday = mday;
3904 mytm.tm_year = year;
3905 mytm.tm_wday = wday;
3906 mytm.tm_yday = yday;
3907 mytm.tm_isdst = isdst;
3909 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3910 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3915 #ifdef HAS_TM_TM_GMTOFF
3916 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3918 #ifdef HAS_TM_TM_ZONE
3919 mytm.tm_zone = mytm2.tm_zone;
3924 Newx(buf, buflen, char);
3925 len = strftime(buf, buflen, fmt, &mytm);
3927 ** The following is needed to handle to the situation where
3928 ** tmpbuf overflows. Basically we want to allocate a buffer
3929 ** and try repeatedly. The reason why it is so complicated
3930 ** is that getting a return value of 0 from strftime can indicate
3931 ** one of the following:
3932 ** 1. buffer overflowed,
3933 ** 2. illegal conversion specifier, or
3934 ** 3. the format string specifies nothing to be returned(not
3935 ** an error). This could be because format is an empty string
3936 ** or it specifies %p that yields an empty string in some locale.
3937 ** If there is a better way to make it portable, go ahead by
3940 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3943 /* Possibly buf overflowed - try again with a bigger buf */
3944 const int fmtlen = strlen(fmt);
3945 int bufsize = fmtlen + buflen;
3947 Newx(buf, bufsize, char);
3949 buflen = strftime(buf, bufsize, fmt, &mytm);
3950 if (buflen > 0 && buflen < bufsize)
3952 /* heuristic to prevent out-of-memory errors */
3953 if (bufsize > 100*fmtlen) {
3959 Renew(buf, bufsize, char);
3964 Perl_croak(aTHX_ "panic: no strftime");
3970 #define SV_CWD_RETURN_UNDEF \
3971 sv_setsv(sv, &PL_sv_undef); \
3974 #define SV_CWD_ISDOT(dp) \
3975 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3976 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3979 =head1 Miscellaneous Functions
3981 =for apidoc getcwd_sv
3983 Fill the sv with current working directory
3988 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3989 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3990 * getcwd(3) if available
3991 * Comments from the orignal:
3992 * This is a faster version of getcwd. It's also more dangerous
3993 * because you might chdir out of a directory that you can't chdir
3997 Perl_getcwd_sv(pTHX_ register SV *sv)
4001 #ifndef INCOMPLETE_TAINTS
4007 char buf[MAXPATHLEN];
4009 /* Some getcwd()s automatically allocate a buffer of the given
4010 * size from the heap if they are given a NULL buffer pointer.
4011 * The problem is that this behaviour is not portable. */
4012 if (getcwd(buf, sizeof(buf) - 1)) {
4017 sv_setsv(sv, &PL_sv_undef);
4025 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4029 SvUPGRADE(sv, SVt_PV);
4031 if (PerlLIO_lstat(".", &statbuf) < 0) {
4032 SV_CWD_RETURN_UNDEF;
4035 orig_cdev = statbuf.st_dev;
4036 orig_cino = statbuf.st_ino;
4045 if (PerlDir_chdir("..") < 0) {
4046 SV_CWD_RETURN_UNDEF;
4048 if (PerlLIO_stat(".", &statbuf) < 0) {
4049 SV_CWD_RETURN_UNDEF;
4052 cdev = statbuf.st_dev;
4053 cino = statbuf.st_ino;
4055 if (odev == cdev && oino == cino) {
4058 if (!(dir = PerlDir_open("."))) {
4059 SV_CWD_RETURN_UNDEF;
4062 while ((dp = PerlDir_read(dir)) != NULL) {
4064 const int namelen = dp->d_namlen;
4066 const int namelen = strlen(dp->d_name);
4069 if (SV_CWD_ISDOT(dp)) {
4073 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
4074 SV_CWD_RETURN_UNDEF;
4077 tdev = statbuf.st_dev;
4078 tino = statbuf.st_ino;
4079 if (tino == oino && tdev == odev) {
4085 SV_CWD_RETURN_UNDEF;
4088 if (pathlen + namelen + 1 >= MAXPATHLEN) {
4089 SV_CWD_RETURN_UNDEF;
4092 SvGROW(sv, pathlen + namelen + 1);
4096 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4099 /* prepend current directory to the front */
4101 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4102 pathlen += (namelen + 1);
4104 #ifdef VOID_CLOSEDIR
4107 if (PerlDir_close(dir) < 0) {
4108 SV_CWD_RETURN_UNDEF;
4114 SvCUR_set(sv, pathlen);
4118 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
4119 SV_CWD_RETURN_UNDEF;
4122 if (PerlLIO_stat(".", &statbuf) < 0) {
4123 SV_CWD_RETURN_UNDEF;
4126 cdev = statbuf.st_dev;
4127 cino = statbuf.st_ino;
4129 if (cdev != orig_cdev || cino != orig_cino) {
4130 Perl_croak(aTHX_ "Unstable directory path, "
4131 "current directory changed unexpectedly");
4143 =for apidoc scan_version
4145 Returns a pointer to the next character after the parsed
4146 version string, as well as upgrading the passed in SV to
4149 Function must be called with an already existing SV like
4152 s = scan_version(s, SV *sv, bool qv);
4154 Performs some preprocessing to the string to ensure that
4155 it has the correct characteristics of a version. Flags the
4156 object if it contains an underscore (which denotes this
4157 is an alpha version). The boolean qv denotes that the version
4158 should be interpreted as if it had multiple decimals, even if
4165 Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
4173 AV * const av = newAV();
4174 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
4175 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4177 #ifndef NODEFAULT_SHAREKEYS
4178 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4181 while (isSPACE(*s)) /* leading whitespace is OK */
4187 s++; /* get past 'v' */
4188 qv = 1; /* force quoted version processing */
4193 /* pre-scan the input string to check for decimals/underbars */
4194 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
4199 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
4203 else if ( *pos == '_' )
4206 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
4208 width = pos - last - 1; /* natural width of sub-version */
4213 if ( alpha && !saw_period )
4214 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4216 if ( alpha && saw_period && width == 0 )
4217 Perl_croak(aTHX_ "Invalid version format (misplaced _ in number)");
4219 if ( saw_period > 1 )
4220 qv = 1; /* force quoted version processing */
4225 hv_store((HV *)hv, "qv", 2, newSViv(qv), 0);
4227 hv_store((HV *)hv, "alpha", 5, newSViv(alpha), 0);
4228 if ( !qv && width < 3 )
4229 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4231 while (isDIGIT(*pos))
4233 if (!isALPHA(*pos)) {
4239 /* this is atoi() that delimits on underscores */
4240 const char *end = pos;
4244 /* the following if() will only be true after the decimal
4245 * point of a version originally created with a bare
4246 * floating point number, i.e. not quoted in any way
4248 if ( !qv && s > start && saw_period == 1 ) {
4252 rev += (*s - '0') * mult;
4254 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4255 Perl_croak(aTHX_ "Integer overflow in version");
4262 while (--end >= s) {
4264 rev += (*end - '0') * mult;
4266 if ( PERL_ABS(orev) > PERL_ABS(rev) )
4267 Perl_croak(aTHX_ "Integer overflow in version");
4272 /* Append revision */
4273 av_push(av, newSViv(rev));
4276 else if ( *pos == '_' && isDIGIT(pos[1]) )
4278 else if ( isDIGIT(*pos) )
4285 while ( isDIGIT(*pos) )
4290 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4298 if ( qv ) { /* quoted versions always get at least three terms*/
4299 I32 len = av_len(av);
4300 /* This for loop appears to trigger a compiler bug on OS X, as it
4301 loops infinitely. Yes, len is negative. No, it makes no sense.
4302 Compiler in question is:
4303 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4304 for ( len = 2 - len; len > 0; len-- )
4305 av_push((AV *)sv, newSViv(0));
4309 av_push(av, newSViv(0));
4312 /* need to save off the current version string for later */
4314 SV * orig = newSVpvn(start,s-start);
4315 if ( qv && saw_period == 1 && *start != 'v' ) {
4316 /* need to insert a v to be consistent */
4317 sv_insert(orig, 0, 0, "v", 1);
4319 hv_store((HV *)hv, "original", 8, orig, 0);
4322 hv_store((HV *)hv, "original", 8, newSVpvn("0",1), 0);
4323 av_push(av, newSViv(0));
4326 /* And finally, store the AV in the hash */
4327 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4329 /* fix RT#19517 - special case 'undef' as string */
4330 if ( *s == 'u' && strEQ(s,"undef") ) {
4338 =for apidoc new_version
4340 Returns a new version object based on the passed in SV:
4342 SV *sv = new_version(SV *ver);
4344 Does not alter the passed in ver SV. See "upg_version" if you
4345 want to upgrade the SV.
4351 Perl_new_version(pTHX_ SV *ver)
4354 SV * const rv = newSV(0);
4355 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4358 AV * const av = newAV();
4360 /* This will get reblessed later if a derived class*/
4361 SV * const hv = newSVrv(rv, "version");
4362 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4363 #ifndef NODEFAULT_SHAREKEYS
4364 HvSHAREKEYS_on(hv); /* key-sharing on by default */
4370 /* Begin copying all of the elements */
4371 if ( hv_exists((HV *)ver, "qv", 2) )
4372 hv_store((HV *)hv, "qv", 2, &PL_sv_yes, 0);
4374 if ( hv_exists((HV *)ver, "alpha", 5) )
4375 hv_store((HV *)hv, "alpha", 5, &PL_sv_yes, 0);
4377 if ( hv_exists((HV*)ver, "width", 5 ) )
4379 const I32 width = SvIV(*hv_fetchs((HV*)ver, "width", FALSE));
4380 hv_store((HV *)hv, "width", 5, newSViv(width), 0);
4383 if ( hv_exists((HV*)ver, "original", 8 ) )
4385 SV * pv = *hv_fetchs((HV*)ver, "original", FALSE);
4386 hv_store((HV *)hv, "original", 8, newSVsv(pv), 0);
4389 sav = (AV *)SvRV(*hv_fetchs((HV*)ver, "version", FALSE));
4390 /* This will get reblessed later if a derived class*/
4391 for ( key = 0; key <= av_len(sav); key++ )
4393 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4394 av_push(av, newSViv(rev));
4397 hv_store((HV *)hv, "version", 7, newRV_noinc((SV *)av), 0);
4402 const MAGIC* const mg = SvVSTRING_mg(ver);
4403 if ( mg ) { /* already a v-string */
4404 const STRLEN len = mg->mg_len;
4405 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4406 sv_setpvn(rv,version,len);
4407 /* this is for consistency with the pure Perl class */
4408 if ( *version != 'v' )
4409 sv_insert(rv, 0, 0, "v", 1);
4414 sv_setsv(rv,ver); /* make a duplicate */
4419 return upg_version(rv, FALSE);
4423 =for apidoc upg_version
4425 In-place upgrade of the supplied SV to a version object.
4427 SV *sv = upg_version(SV *sv, bool qv);
4429 Returns a pointer to the upgraded SV. Set the boolean qv if you want
4430 to force this SV to be interpreted as an "extended" version.
4436 Perl_upg_version(pTHX_ SV *ver, bool qv)
4438 const char *version, *s;
4443 if ( SvNOK(ver) && !( SvPOK(ver) && sv_len(ver) == 3 ) )
4445 /* may get too much accuracy */
4447 #ifdef USE_LOCALE_NUMERIC
4448 char *loc = setlocale(LC_NUMERIC, "C");
4450 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4451 #ifdef USE_LOCALE_NUMERIC
4452 setlocale(LC_NUMERIC, loc);
4454 while (tbuf[len-1] == '0' && len > 0) len--;
4455 if ( tbuf[len-1] == '.' ) len--; /* eat the trailing decimal */
4456 version = savepvn(tbuf, len);
4459 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
4460 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
4464 else /* must be a string or something like a string */
4467 version = savepv(SvPV(ver,len));
4469 # if PERL_VERSION > 5
4470 /* This will only be executed for 5.6.0 - 5.8.0 inclusive */
4471 if ( len == 3 && !instr(version,".") && !instr(version,"_") ) {
4472 /* may be a v-string */
4473 SV * const nsv = sv_newmortal();
4477 sv_setpvf(nsv,"v%vd",ver);
4478 pos = nver = savepv(SvPV_nolen(nsv));
4480 /* scan the resulting formatted string */
4481 pos++; /* skip the leading 'v' */
4482 while ( *pos == '.' || isDIGIT(*pos) ) {
4488 /* is definitely a v-string */
4489 if ( saw_period == 2 ) {
4498 s = scan_version(version, ver, qv);
4500 if(ckWARN(WARN_MISC))
4501 Perl_warner(aTHX_ packWARN(WARN_MISC),
4502 "Version string '%s' contains invalid data; "
4503 "ignoring: '%s'", version, s);
4511 Validates that the SV contains a valid version object.
4513 bool vverify(SV *vobj);
4515 Note that it only confirms the bare minimum structure (so as not to get
4516 confused by derived classes which may contain additional hash entries):
4520 =item * The SV contains a [reference to a] hash
4522 =item * The hash contains a "version" key
4524 =item * The "version" key has [a reference to] an AV as its value
4532 Perl_vverify(pTHX_ SV *vs)
4538 /* see if the appropriate elements exist */
4539 if ( SvTYPE(vs) == SVt_PVHV
4540 && hv_exists((HV*)vs, "version", 7)
4541 && (sv = SvRV(*hv_fetchs((HV*)vs, "version", FALSE)))
4542 && SvTYPE(sv) == SVt_PVAV )
4551 Accepts a version object and returns the normalized floating
4552 point representation. Call like:
4556 NOTE: you can pass either the object directly or the SV
4557 contained within the RV.
4563 Perl_vnumify(pTHX_ SV *vs)
4568 SV * const sv = newSV(0);
4574 Perl_croak(aTHX_ "Invalid version object");
4576 /* see if various flags exist */
4577 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4579 if ( hv_exists((HV*)vs, "width", 5 ) )
4580 width = SvIV(*hv_fetchs((HV*)vs, "width", FALSE));
4585 /* attempt to retrieve the version array */
4586 if ( !(av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE)) ) ) {
4598 digit = SvIV(*av_fetch(av, 0, 0));
4599 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
4600 for ( i = 1 ; i < len ; i++ )
4602 digit = SvIV(*av_fetch(av, i, 0));
4604 const int denom = (width == 2 ? 10 : 100);
4605 const div_t term = div((int)PERL_ABS(digit),denom);
4606 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
4609 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4615 digit = SvIV(*av_fetch(av, len, 0));
4616 if ( alpha && width == 3 ) /* alpha version */
4618 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4622 sv_catpvs(sv, "000");
4630 Accepts a version object and returns the normalized string
4631 representation. Call like:
4635 NOTE: you can pass either the object directly or the SV
4636 contained within the RV.
4642 Perl_vnormal(pTHX_ SV *vs)
4646 SV * const sv = newSV(0);
4652 Perl_croak(aTHX_ "Invalid version object");
4654 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4656 av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE));
4664 digit = SvIV(*av_fetch(av, 0, 0));
4665 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
4666 for ( i = 1 ; i < len ; i++ ) {
4667 digit = SvIV(*av_fetch(av, i, 0));
4668 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4673 /* handle last digit specially */
4674 digit = SvIV(*av_fetch(av, len, 0));
4676 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
4678 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4681 if ( len <= 2 ) { /* short version, must be at least three */
4682 for ( len = 2 - len; len != 0; len-- )
4689 =for apidoc vstringify
4691 In order to maintain maximum compatibility with earlier versions
4692 of Perl, this function will return either the floating point
4693 notation or the multiple dotted notation, depending on whether
4694 the original version contained 1 or more dots, respectively
4700 Perl_vstringify(pTHX_ SV *vs)
4707 Perl_croak(aTHX_ "Invalid version object");
4709 pv = *hv_fetchs((HV*)vs, "original", FALSE);
4713 return &PL_sv_undef;
4719 Version object aware cmp. Both operands must already have been
4720 converted into version objects.
4726 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
4729 bool lalpha = FALSE;
4730 bool ralpha = FALSE;
4739 if ( !vverify(lhv) )
4740 Perl_croak(aTHX_ "Invalid version object");
4742 if ( !vverify(rhv) )
4743 Perl_croak(aTHX_ "Invalid version object");
4745 /* get the left hand term */
4746 lav = (AV *)SvRV(*hv_fetchs((HV*)lhv, "version", FALSE));
4747 if ( hv_exists((HV*)lhv, "alpha", 5 ) )
4750 /* and the right hand term */
4751 rav = (AV *)SvRV(*hv_fetchs((HV*)rhv, "version", FALSE));
4752 if ( hv_exists((HV*)rhv, "alpha", 5 ) )
4760 while ( i <= m && retval == 0 )
4762 left = SvIV(*av_fetch(lav,i,0));
4763 right = SvIV(*av_fetch(rav,i,0));
4771 /* tiebreaker for alpha with identical terms */
4772 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4774 if ( lalpha && !ralpha )
4778 else if ( ralpha && !lalpha)
4784 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
4788 while ( i <= r && retval == 0 )
4790 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
4791 retval = -1; /* not a match after all */
4797 while ( i <= l && retval == 0 )
4799 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
4800 retval = +1; /* not a match after all */
4808 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4809 # define EMULATE_SOCKETPAIR_UDP
4812 #ifdef EMULATE_SOCKETPAIR_UDP
4814 S_socketpair_udp (int fd[2]) {
4816 /* Fake a datagram socketpair using UDP to localhost. */
4817 int sockets[2] = {-1, -1};
4818 struct sockaddr_in addresses[2];
4820 Sock_size_t size = sizeof(struct sockaddr_in);
4821 unsigned short port;
4824 memset(&addresses, 0, sizeof(addresses));
4827 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4828 if (sockets[i] == -1)
4829 goto tidy_up_and_fail;
4831 addresses[i].sin_family = AF_INET;
4832 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4833 addresses[i].sin_port = 0; /* kernel choses port. */
4834 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4835 sizeof(struct sockaddr_in)) == -1)
4836 goto tidy_up_and_fail;
4839 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4840 for each connect the other socket to it. */
4843 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4845 goto tidy_up_and_fail;
4846 if (size != sizeof(struct sockaddr_in))
4847 goto abort_tidy_up_and_fail;
4848 /* !1 is 0, !0 is 1 */
4849 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4850 sizeof(struct sockaddr_in)) == -1)
4851 goto tidy_up_and_fail;
4854 /* Now we have 2 sockets connected to each other. I don't trust some other
4855 process not to have already sent a packet to us (by random) so send
4856 a packet from each to the other. */
4859 /* I'm going to send my own port number. As a short.
4860 (Who knows if someone somewhere has sin_port as a bitfield and needs
4861 this routine. (I'm assuming crays have socketpair)) */
4862 port = addresses[i].sin_port;
4863 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4864 if (got != sizeof(port)) {
4866 goto tidy_up_and_fail;
4867 goto abort_tidy_up_and_fail;
4871 /* Packets sent. I don't trust them to have arrived though.
4872 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4873 connect to localhost will use a second kernel thread. In 2.6 the
4874 first thread running the connect() returns before the second completes,
4875 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4876 returns 0. Poor programs have tripped up. One poor program's authors'
4877 had a 50-1 reverse stock split. Not sure how connected these were.)
4878 So I don't trust someone not to have an unpredictable UDP stack.
4882 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4883 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4887 FD_SET((unsigned int)sockets[0], &rset);
4888 FD_SET((unsigned int)sockets[1], &rset);
4890 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4891 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4892 || !FD_ISSET(sockets[1], &rset)) {
4893 /* I hope this is portable and appropriate. */
4895 goto tidy_up_and_fail;
4896 goto abort_tidy_up_and_fail;
4900 /* And the paranoia department even now doesn't trust it to have arrive
4901 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4903 struct sockaddr_in readfrom;
4904 unsigned short buffer[2];
4909 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4910 sizeof(buffer), MSG_DONTWAIT,
4911 (struct sockaddr *) &readfrom, &size);
4913 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4915 (struct sockaddr *) &readfrom, &size);
4919 goto tidy_up_and_fail;
4920 if (got != sizeof(port)
4921 || size != sizeof(struct sockaddr_in)
4922 /* Check other socket sent us its port. */
4923 || buffer[0] != (unsigned short) addresses[!i].sin_port
4924 /* Check kernel says we got the datagram from that socket */
4925 || readfrom.sin_family != addresses[!i].sin_family
4926 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4927 || readfrom.sin_port != addresses[!i].sin_port)
4928 goto abort_tidy_up_and_fail;
4931 /* My caller (my_socketpair) has validated that this is non-NULL */
4934 /* I hereby declare this connection open. May God bless all who cross
4938 abort_tidy_up_and_fail:
4939 errno = ECONNABORTED;
4942 const int save_errno = errno;
4943 if (sockets[0] != -1)
4944 PerlLIO_close(sockets[0]);
4945 if (sockets[1] != -1)
4946 PerlLIO_close(sockets[1]);
4951 #endif /* EMULATE_SOCKETPAIR_UDP */
4953 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4955 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4956 /* Stevens says that family must be AF_LOCAL, protocol 0.
4957 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4962 struct sockaddr_in listen_addr;
4963 struct sockaddr_in connect_addr;
4968 || family != AF_UNIX
4971 errno = EAFNOSUPPORT;
4979 #ifdef EMULATE_SOCKETPAIR_UDP
4980 if (type == SOCK_DGRAM)
4981 return S_socketpair_udp(fd);
4984 listener = PerlSock_socket(AF_INET, type, 0);
4987 memset(&listen_addr, 0, sizeof(listen_addr));
4988 listen_addr.sin_family = AF_INET;
4989 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4990 listen_addr.sin_port = 0; /* kernel choses port. */
4991 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
4992 sizeof(listen_addr)) == -1)
4993 goto tidy_up_and_fail;
4994 if (PerlSock_listen(listener, 1) == -1)
4995 goto tidy_up_and_fail;
4997 connector = PerlSock_socket(AF_INET, type, 0);
4998 if (connector == -1)
4999 goto tidy_up_and_fail;
5000 /* We want to find out the port number to connect to. */
5001 size = sizeof(connect_addr);
5002 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
5004 goto tidy_up_and_fail;
5005 if (size != sizeof(connect_addr))
5006 goto abort_tidy_up_and_fail;
5007 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
5008 sizeof(connect_addr)) == -1)
5009 goto tidy_up_and_fail;
5011 size = sizeof(listen_addr);
5012 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
5015 goto tidy_up_and_fail;
5016 if (size != sizeof(listen_addr))
5017 goto abort_tidy_up_and_fail;
5018 PerlLIO_close(listener);
5019 /* Now check we are talking to ourself by matching port and host on the
5021 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
5023 goto tidy_up_and_fail;
5024 if (size != sizeof(connect_addr)
5025 || listen_addr.sin_family != connect_addr.sin_family
5026 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
5027 || listen_addr.sin_port != connect_addr.sin_port) {
5028 goto abort_tidy_up_and_fail;
5034 abort_tidy_up_and_fail:
5036 errno = ECONNABORTED; /* This would be the standard thing to do. */
5038 # ifdef ECONNREFUSED
5039 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
5041 errno = ETIMEDOUT; /* Desperation time. */
5046 const int save_errno = errno;
5048 PerlLIO_close(listener);
5049 if (connector != -1)
5050 PerlLIO_close(connector);
5052 PerlLIO_close(acceptor);
5058 /* In any case have a stub so that there's code corresponding
5059 * to the my_socketpair in global.sym. */
5061 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
5062 #ifdef HAS_SOCKETPAIR
5063 return socketpair(family, type, protocol, fd);
5072 =for apidoc sv_nosharing
5074 Dummy routine which "shares" an SV when there is no sharing module present.
5075 Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
5076 Exists to avoid test for a NULL function pointer and because it could
5077 potentially warn under some level of strict-ness.
5083 Perl_sv_nosharing(pTHX_ SV *sv)
5085 PERL_UNUSED_CONTEXT;
5086 PERL_UNUSED_ARG(sv);
5090 Perl_parse_unicode_opts(pTHX_ const char **popt)
5092 const char *p = *popt;
5097 opt = (U32) atoi(p);
5100 if (*p && *p != '\n' && *p != '\r')
5101 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
5106 case PERL_UNICODE_STDIN:
5107 opt |= PERL_UNICODE_STDIN_FLAG; break;
5108 case PERL_UNICODE_STDOUT:
5109 opt |= PERL_UNICODE_STDOUT_FLAG; break;
5110 case PERL_UNICODE_STDERR:
5111 opt |= PERL_UNICODE_STDERR_FLAG; break;
5112 case PERL_UNICODE_STD:
5113 opt |= PERL_UNICODE_STD_FLAG; break;
5114 case PERL_UNICODE_IN:
5115 opt |= PERL_UNICODE_IN_FLAG; break;
5116 case PERL_UNICODE_OUT:
5117 opt |= PERL_UNICODE_OUT_FLAG; break;
5118 case PERL_UNICODE_INOUT:
5119 opt |= PERL_UNICODE_INOUT_FLAG; break;
5120 case PERL_UNICODE_LOCALE:
5121 opt |= PERL_UNICODE_LOCALE_FLAG; break;
5122 case PERL_UNICODE_ARGV:
5123 opt |= PERL_UNICODE_ARGV_FLAG; break;
5124 case PERL_UNICODE_UTF8CACHEASSERT:
5125 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
5127 if (*p != '\n' && *p != '\r')
5129 "Unknown Unicode option letter '%c'", *p);
5135 opt = PERL_UNICODE_DEFAULT_FLAGS;
5137 if (opt & ~PERL_UNICODE_ALL_FLAGS)
5138 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
5139 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
5151 * This is really just a quick hack which grabs various garbage
5152 * values. It really should be a real hash algorithm which
5153 * spreads the effect of every input bit onto every output bit,
5154 * if someone who knows about such things would bother to write it.
5155 * Might be a good idea to add that function to CORE as well.
5156 * No numbers below come from careful analysis or anything here,
5157 * except they are primes and SEED_C1 > 1E6 to get a full-width
5158 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
5159 * probably be bigger too.
5162 # define SEED_C1 1000003
5163 #define SEED_C4 73819
5165 # define SEED_C1 25747
5166 #define SEED_C4 20639
5170 #define SEED_C5 26107
5172 #ifndef PERL_NO_DEV_RANDOM
5177 # include <starlet.h>
5178 /* when[] = (low 32 bits, high 32 bits) of time since epoch
5179 * in 100-ns units, typically incremented ever 10 ms. */
5180 unsigned int when[2];
5182 # ifdef HAS_GETTIMEOFDAY
5183 struct timeval when;
5189 /* This test is an escape hatch, this symbol isn't set by Configure. */
5190 #ifndef PERL_NO_DEV_RANDOM
5191 #ifndef PERL_RANDOM_DEVICE
5192 /* /dev/random isn't used by default because reads from it will block
5193 * if there isn't enough entropy available. You can compile with
5194 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
5195 * is enough real entropy to fill the seed. */
5196 # define PERL_RANDOM_DEVICE "/dev/urandom"
5198 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
5200 if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u)
5209 _ckvmssts(sys$gettim(when));
5210 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
5212 # ifdef HAS_GETTIMEOFDAY
5213 PerlProc_gettimeofday(&when,NULL);
5214 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
5217 u = (U32)SEED_C1 * when;
5220 u += SEED_C3 * (U32)PerlProc_getpid();
5221 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
5222 #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
5223 u += SEED_C5 * (U32)PTR2UV(&when);
5229 Perl_get_hash_seed(pTHX)
5232 const char *s = PerlEnv_getenv("PERL_HASH_SEED");
5238 if (s && isDIGIT(*s))
5239 myseed = (UV)Atoul(s);
5241 #ifdef USE_HASH_SEED_EXPLICIT
5245 /* Compute a random seed */
5246 (void)seedDrand01((Rand_seed_t)seed());
5247 myseed = (UV)(Drand01() * (NV)UV_MAX);
5248 #if RANDBITS < (UVSIZE * 8)
5249 /* Since there are not enough randbits to to reach all
5250 * the bits of a UV, the low bits might need extra
5251 * help. Sum in another random number that will
5252 * fill in the low bits. */
5254 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
5255 #endif /* RANDBITS < (UVSIZE * 8) */
5256 if (myseed == 0) { /* Superparanoia. */
5257 myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
5259 Perl_croak(aTHX_ "Your random numbers are not that random");
5262 PL_rehash_seed_set = TRUE;
5269 Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
5271 const char * const stashpv = CopSTASHPV(c);
5272 const char * const name = HvNAME_get(hv);
5273 PERL_UNUSED_CONTEXT;
5275 if (stashpv == name)
5277 if (stashpv && name)
5278 if (strEQ(stashpv, name))
5285 #ifdef PERL_GLOBAL_STRUCT
5287 #define PERL_GLOBAL_STRUCT_INIT
5288 #include "opcode.h" /* the ppaddr and check */
5291 Perl_init_global_struct(pTHX)
5293 struct perl_vars *plvarsp = NULL;
5294 # ifdef PERL_GLOBAL_STRUCT
5295 const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t);
5296 const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t);
5297 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5298 /* PerlMem_malloc() because can't use even safesysmalloc() this early. */
5299 plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars));
5303 plvarsp = PL_VarsPtr;
5304 # endif /* PERL_GLOBAL_STRUCT_PRIVATE */
5310 # define PERLVAR(var,type) /**/
5311 # define PERLVARA(var,n,type) /**/
5312 # define PERLVARI(var,type,init) plvarsp->var = init;
5313 # define PERLVARIC(var,type,init) plvarsp->var = init;
5314 # define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char);
5315 # include "perlvars.h"
5321 # ifdef PERL_GLOBAL_STRUCT
5324 PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t));
5325 if (!plvarsp->Gppaddr)
5329 PerlMem_malloc(ncheck * sizeof(Perl_check_t));
5330 if (!plvarsp->Gcheck)
5332 Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t);
5333 Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t);
5335 # ifdef PERL_SET_VARS
5336 PERL_SET_VARS(plvarsp);
5338 # undef PERL_GLOBAL_STRUCT_INIT
5343 #endif /* PERL_GLOBAL_STRUCT */
5345 #ifdef PERL_GLOBAL_STRUCT
5348 Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
5350 # ifdef PERL_GLOBAL_STRUCT
5351 # ifdef PERL_UNSET_VARS
5352 PERL_UNSET_VARS(plvarsp);
5354 free(plvarsp->Gppaddr);
5355 free(plvarsp->Gcheck);
5356 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5362 #endif /* PERL_GLOBAL_STRUCT */
5367 * PERL_MEM_LOG: the Perl_mem_log_..() will be compiled.
5369 * PERL_MEM_LOG_ENV: if defined, during run time the environment
5370 * variable PERL_MEM_LOG will be consulted, and if the integer value
5371 * of that is true, the logging will happen. (The default is to
5372 * always log if the PERL_MEM_LOG define was in effect.)
5376 * PERL_MEM_LOG_SPRINTF_BUF_SIZE: size of a (stack-allocated) buffer
5377 * the Perl_mem_log_...() will use (either via sprintf or snprintf).
5379 #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128
5382 * PERL_MEM_LOG_FD: the file descriptor the Perl_mem_log_...() will
5383 * log to. You can also define in compile time PERL_MEM_LOG_ENV_FD,
5384 * in which case the environment variable PERL_MEM_LOG_FD will be
5385 * consulted for the file descriptor number to use.
5387 #ifndef PERL_MEM_LOG_FD
5388 # define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */
5392 Perl_mem_log_alloc(const UV n, const UV typesize, const char *typename, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
5394 #ifdef PERL_MEM_LOG_STDERR
5395 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5398 # ifdef PERL_MEM_LOG_ENV
5399 s = getenv("PERL_MEM_LOG");
5400 if (s ? atoi(s) : 0)
5403 /* We can't use SVs or PerlIO for obvious reasons,
5404 * so we'll use stdio and low-level IO instead. */
5405 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5406 # ifdef PERL_MEM_LOG_TIMESTAMP
5408 # ifdef HAS_GETTIMEOFDAY
5409 gettimeofday(&tv, 0);
5411 /* If there are other OS specific ways of hires time than
5412 * gettimeofday() (see ext/Time/HiRes), the easiest way is
5413 * probably that they would be used to fill in the struct
5420 # ifdef PERL_MEM_LOG_TIMESTAMP
5423 "alloc: %s:%d:%s: %"IVdf" %"UVuf
5424 " %s = %"IVdf": %"UVxf"\n",
5425 # ifdef PERL_MEM_LOG_TIMESTAMP
5426 (int)tv.tv_sec, (int)tv.tv_usec,
5428 filename, linenumber, funcname, n, typesize,
5429 typename, n * typesize, PTR2UV(newalloc));
5430 # ifdef PERL_MEM_LOG_ENV_FD
5431 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5432 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5434 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5443 Perl_mem_log_realloc(const UV n, const UV typesize, const char *typename, Malloc_t oldalloc, Malloc_t newalloc, const char *filename, const int linenumber, const char *funcname)
5445 #ifdef PERL_MEM_LOG_STDERR
5446 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5449 # ifdef PERL_MEM_LOG_ENV
5450 s = PerlEnv_getenv("PERL_MEM_LOG");
5451 if (s ? atoi(s) : 0)
5454 /* We can't use SVs or PerlIO for obvious reasons,
5455 * so we'll use stdio and low-level IO instead. */
5456 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5457 # ifdef PERL_MEM_LOG_TIMESTAMP
5459 gettimeofday(&tv, 0);
5465 # ifdef PERL_MEM_LOG_TIMESTAMP
5468 "realloc: %s:%d:%s: %"IVdf" %"UVuf
5469 " %s = %"IVdf": %"UVxf" -> %"UVxf"\n",
5470 # ifdef PERL_MEM_LOG_TIMESTAMP
5471 (int)tv.tv_sec, (int)tv.tv_usec,
5473 filename, linenumber, funcname, n, typesize,
5474 typename, n * typesize, PTR2UV(oldalloc),
5476 # ifdef PERL_MEM_LOG_ENV_FD
5477 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5478 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5480 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5489 Perl_mem_log_free(Malloc_t oldalloc, const char *filename, const int linenumber, const char *funcname)
5491 #ifdef PERL_MEM_LOG_STDERR
5492 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5495 # ifdef PERL_MEM_LOG_ENV
5496 s = PerlEnv_getenv("PERL_MEM_LOG");
5497 if (s ? atoi(s) : 0)
5500 /* We can't use SVs or PerlIO for obvious reasons,
5501 * so we'll use stdio and low-level IO instead. */
5502 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5503 # ifdef PERL_MEM_LOG_TIMESTAMP
5505 gettimeofday(&tv, 0);
5511 # ifdef PERL_MEM_LOG_TIMESTAMP
5514 "free: %s:%d:%s: %"UVxf"\n",
5515 # ifdef PERL_MEM_LOG_TIMESTAMP
5516 (int)tv.tv_sec, (int)tv.tv_usec,
5518 filename, linenumber, funcname,
5520 # ifdef PERL_MEM_LOG_ENV_FD
5521 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5522 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5524 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5532 #endif /* PERL_MEM_LOG */
5535 =for apidoc my_sprintf
5537 The C library C<sprintf>, wrapped if necessary, to ensure that it will return
5538 the length of the string written to the buffer. Only rare pre-ANSI systems
5539 need the wrapper function - usually this is a direct call to C<sprintf>.
5543 #ifndef SPRINTF_RETURNS_STRLEN
5545 Perl_my_sprintf(char *buffer, const char* pat, ...)
5548 va_start(args, pat);
5549 vsprintf(buffer, pat, args);
5551 return strlen(buffer);
5556 =for apidoc my_snprintf
5558 The C library C<snprintf> functionality, if available and
5559 standards-compliant (uses C<vsnprintf>, actually). However, if the
5560 C<vsnprintf> is not available, will unfortunately use the unsafe
5561 C<vsprintf> which can overrun the buffer (there is an overrun check,
5562 but that may be too late). Consider using C<sv_vcatpvf> instead, or
5563 getting C<vsnprintf>.
5568 Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
5573 va_start(ap, format);
5574 #ifdef HAS_VSNPRINTF
5575 retval = vsnprintf(buffer, len, format, ap);
5577 retval = vsprintf(buffer, format, ap);
5580 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5581 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5582 Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
5587 =for apidoc my_vsnprintf
5589 The C library C<vsnprintf> if available and standards-compliant.
5590 However, if if the C<vsnprintf> is not available, will unfortunately
5591 use the unsafe C<vsprintf> which can overrun the buffer (there is an
5592 overrun check, but that may be too late). Consider using
5593 C<sv_vcatpvf> instead, or getting C<vsnprintf>.
5598 Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap)
5604 Perl_va_copy(ap, apc);
5605 # ifdef HAS_VSNPRINTF
5606 retval = vsnprintf(buffer, len, format, apc);
5608 retval = vsprintf(buffer, format, apc);
5611 # ifdef HAS_VSNPRINTF
5612 retval = vsnprintf(buffer, len, format, ap);
5614 retval = vsprintf(buffer, format, ap);
5616 #endif /* #ifdef NEED_VA_COPY */
5617 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5618 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5619 Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
5624 Perl_my_clearenv(pTHX)
5627 #if ! defined(PERL_MICRO)
5628 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
5630 # else /* ! (PERL_IMPLICIT_SYS || WIN32) */
5631 # if defined(USE_ENVIRON_ARRAY)
5632 # if defined(USE_ITHREADS)
5633 /* only the parent thread can clobber the process environment */
5634 if (PL_curinterp == aTHX)
5635 # endif /* USE_ITHREADS */
5637 # if ! defined(PERL_USE_SAFE_PUTENV)
5638 if ( !PL_use_safe_putenv) {
5640 if (environ == PL_origenviron)
5641 environ = (char**)safesysmalloc(sizeof(char*));
5643 for (i = 0; environ[i]; i++)
5644 (void)safesysfree(environ[i]);
5647 # else /* PERL_USE_SAFE_PUTENV */
5648 # if defined(HAS_CLEARENV)
5650 # elif defined(HAS_UNSETENV)
5651 int bsiz = 80; /* Most envvar names will be shorter than this. */
5652 int bufsiz = bsiz * sizeof(char); /* sizeof(char) paranoid? */
5653 char *buf = (char*)safesysmalloc(bufsiz);
5654 while (*environ != NULL) {
5655 char *e = strchr(*environ, '=');
5656 int l = e ? e - *environ : (int)strlen(*environ);
5658 (void)safesysfree(buf);
5659 bsiz = l + 1; /* + 1 for the \0. */
5660 buf = (char*)safesysmalloc(bufsiz);
5662 my_strlcpy(buf, *environ, l + 1);
5663 (void)unsetenv(buf);
5665 (void)safesysfree(buf);
5666 # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */
5667 /* Just null environ and accept the leakage. */
5669 # endif /* HAS_CLEARENV || HAS_UNSETENV */
5670 # endif /* ! PERL_USE_SAFE_PUTENV */
5672 # endif /* USE_ENVIRON_ARRAY */
5673 # endif /* PERL_IMPLICIT_SYS || WIN32 */
5674 #endif /* PERL_MICRO */
5677 #ifdef PERL_IMPLICIT_CONTEXT
5679 /* Implements the MY_CXT_INIT macro. The first time a module is loaded,
5680 the global PL_my_cxt_index is incremented, and that value is assigned to
5681 that module's static my_cxt_index (who's address is passed as an arg).
5682 Then, for each interpreter this function is called for, it makes sure a
5683 void* slot is available to hang the static data off, by allocating or
5684 extending the interpreter's PL_my_cxt_list array */
5686 #ifndef PERL_GLOBAL_STRUCT_PRIVATE
5688 Perl_my_cxt_init(pTHX_ int *index, size_t size)
5693 /* this module hasn't been allocated an index yet */
5694 MUTEX_LOCK(&PL_my_ctx_mutex);
5695 *index = PL_my_cxt_index++;
5696 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5699 /* make sure the array is big enough */
5700 if (PL_my_cxt_size <= *index) {
5701 if (PL_my_cxt_size) {
5702 while (PL_my_cxt_size <= *index)
5703 PL_my_cxt_size *= 2;
5704 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5707 PL_my_cxt_size = 16;
5708 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5711 /* newSV() allocates one more than needed */
5712 p = (void*)SvPVX(newSV(size-1));
5713 PL_my_cxt_list[*index] = p;
5714 Zero(p, size, char);
5718 #else /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5721 Perl_my_cxt_index(pTHX_ const char *my_cxt_key)
5726 for (index = 0; index < PL_my_cxt_index; index++) {
5727 const char *key = PL_my_cxt_keys[index];
5728 /* try direct pointer compare first - there are chances to success,
5729 * and it's much faster.
5731 if ((key == my_cxt_key) || strEQ(key, my_cxt_key))
5738 Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size)
5744 index = Perl_my_cxt_index(aTHX_ my_cxt_key);
5746 /* this module hasn't been allocated an index yet */
5747 MUTEX_LOCK(&PL_my_ctx_mutex);
5748 index = PL_my_cxt_index++;
5749 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5752 /* make sure the array is big enough */
5753 if (PL_my_cxt_size <= index) {
5754 int old_size = PL_my_cxt_size;
5756 if (PL_my_cxt_size) {
5757 while (PL_my_cxt_size <= index)
5758 PL_my_cxt_size *= 2;
5759 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5760 Renew(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5763 PL_my_cxt_size = 16;
5764 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5765 Newx(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5767 for (i = old_size; i < PL_my_cxt_size; i++) {
5768 PL_my_cxt_keys[i] = 0;
5769 PL_my_cxt_list[i] = 0;
5772 PL_my_cxt_keys[index] = my_cxt_key;
5773 /* newSV() allocates one more than needed */
5774 p = (void*)SvPVX(newSV(size-1));
5775 PL_my_cxt_list[index] = p;
5776 Zero(p, size, char);
5779 #endif /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5780 #endif /* PERL_IMPLICIT_CONTEXT */
5784 Perl_my_strlcat(char *dst, const char *src, Size_t size)
5786 Size_t used, length, copy;
5789 length = strlen(src);
5790 if (size > 0 && used < size - 1) {
5791 copy = (length >= size - used) ? size - used - 1 : length;
5792 memcpy(dst + used, src, copy);
5793 dst[used + copy] = '\0';
5795 return used + length;
5801 Perl_my_strlcpy(char *dst, const char *src, Size_t size)
5803 Size_t length, copy;
5805 length = strlen(src);
5807 copy = (length >= size) ? size - 1 : length;
5808 memcpy(dst, src, copy);
5815 #if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_MSC_VER < 1400) && (WINVER < 0x0500)
5816 /* VC7 or 7.1, building with pre-VC7 runtime libraries. */
5817 long _ftol( double ); /* Defined by VC6 C libs. */
5818 long _ftol2( double dblSource ) { return _ftol( dblSource ); }
5822 Perl_get_db_sub(pTHX_ SV **svp, CV *cv)
5825 SV * const dbsv = GvSVn(PL_DBsub);
5826 /* We do not care about using sv to call CV;
5827 * it's for informational purposes only.
5831 if (!PERLDB_SUB_NN) {
5832 GV * const gv = CvGV(cv);
5834 if ( svp && ((CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
5835 || strEQ(GvNAME(gv), "END")
5836 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
5837 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv) )))) {
5838 /* Use GV from the stack as a fallback. */
5839 /* GV is potentially non-unique, or contain different CV. */
5840 SV * const tmp = newRV((SV*)cv);
5841 sv_setsv(dbsv, tmp);
5845 gv_efullname3(dbsv, gv, NULL);
5849 const int type = SvTYPE(dbsv);
5850 if (type < SVt_PVIV && type != SVt_IV)
5851 sv_upgrade(dbsv, SVt_PVIV);
5852 (void)SvIOK_on(dbsv);
5853 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
5858 Perl_my_dirfd(pTHX_ DIR * dir) {
5860 /* Most dirfd implementations have problems when passed NULL. */
5865 #elif defined(HAS_DIR_DD_FD)
5868 Perl_die(aTHX_ PL_no_func, "dirfd");
5875 Perl_get_re_arg(pTHX_ SV *sv) {
5883 (tmpsv = (SV*)SvRV(sv)) && /* assign deliberate */
5884 SvTYPE(tmpsv) == SVt_PVMG &&
5885 (mg = mg_find(tmpsv, PERL_MAGIC_qr))) /* assign deliberate */
5887 return (REGEXP *)mg->mg_obj;
5896 * c-indentation-style: bsd
5898 * indent-tabs-mode: t
5901 * ex: set ts=8 sts=4 sw=4 noet: