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 const 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 newSVpvs_flags("", SVs_TEMP);
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 mPUSHp(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_flags(message, msglen, utf8);
1281 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
1285 call_sv((SV*)cv, G_DISCARD);
1294 S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1298 const char *message;
1301 SV * const msv = vmess(pat, args);
1302 if (PL_errors && SvCUR(PL_errors)) {
1303 sv_catsv(PL_errors, msv);
1304 message = SvPV_const(PL_errors, *msglen);
1305 SvCUR_set(PL_errors, 0);
1308 message = SvPV_const(msv,*msglen);
1309 *utf8 = SvUTF8(msv);
1315 DEBUG_S(PerlIO_printf(Perl_debug_log,
1316 "%p: die/croak: message = %s\ndiehook = %p\n",
1317 (void*)thr, message, (void*)PL_diehook));
1319 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
1325 Perl_vdie(pTHX_ const char* pat, va_list *args)
1328 const char *message;
1329 const int was_in_eval = PL_in_eval;
1333 DEBUG_S(PerlIO_printf(Perl_debug_log,
1334 "%p: die: curstack = %p, mainstack = %p\n",
1335 (void*)thr, (void*)PL_curstack, (void*)PL_mainstack));
1337 message = vdie_croak_common(pat, args, &msglen, &utf8);
1339 PL_restartop = die_where(message, msglen);
1340 SvFLAGS(ERRSV) |= utf8;
1341 DEBUG_S(PerlIO_printf(Perl_debug_log,
1342 "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
1343 (void*)thr, (void*)PL_restartop, was_in_eval, (void*)PL_top_env));
1344 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1346 return PL_restartop;
1349 #if defined(PERL_IMPLICIT_CONTEXT)
1351 Perl_die_nocontext(const char* pat, ...)
1356 va_start(args, pat);
1357 o = vdie(pat, &args);
1361 #endif /* PERL_IMPLICIT_CONTEXT */
1364 Perl_die(pTHX_ const char* pat, ...)
1368 va_start(args, pat);
1369 o = vdie(pat, &args);
1375 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1378 const char *message;
1382 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
1385 PL_restartop = die_where(message, msglen);
1386 SvFLAGS(ERRSV) |= utf8;
1390 message = SvPVx_const(ERRSV, msglen);
1392 write_to_stderr(message, msglen);
1396 #if defined(PERL_IMPLICIT_CONTEXT)
1398 Perl_croak_nocontext(const char *pat, ...)
1402 va_start(args, pat);
1407 #endif /* PERL_IMPLICIT_CONTEXT */
1410 =head1 Warning and Dieing
1414 This is the XSUB-writer's interface to Perl's C<die> function.
1415 Normally call this function the same way you call the C C<printf>
1416 function. Calling C<croak> returns control directly to Perl,
1417 sidestepping the normal C order of execution. See C<warn>.
1419 If you want to throw an exception object, assign the object to
1420 C<$@> and then pass C<NULL> to croak():
1422 errsv = get_sv("@", TRUE);
1423 sv_setsv(errsv, exception_object);
1430 Perl_croak(pTHX_ const char *pat, ...)
1433 va_start(args, pat);
1440 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1444 SV * const msv = vmess(pat, args);
1445 const I32 utf8 = SvUTF8(msv);
1446 const char * const message = SvPV_const(msv, msglen);
1449 if (vdie_common(message, msglen, utf8, TRUE))
1453 write_to_stderr(message, msglen);
1456 #if defined(PERL_IMPLICIT_CONTEXT)
1458 Perl_warn_nocontext(const char *pat, ...)
1462 va_start(args, pat);
1466 #endif /* PERL_IMPLICIT_CONTEXT */
1471 This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1472 function the same way you call the C C<printf> function. See C<croak>.
1478 Perl_warn(pTHX_ const char *pat, ...)
1481 va_start(args, pat);
1486 #if defined(PERL_IMPLICIT_CONTEXT)
1488 Perl_warner_nocontext(U32 err, const char *pat, ...)
1492 va_start(args, pat);
1493 vwarner(err, pat, &args);
1496 #endif /* PERL_IMPLICIT_CONTEXT */
1499 Perl_warner(pTHX_ U32 err, const char* pat,...)
1502 va_start(args, pat);
1503 vwarner(err, pat, &args);
1508 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1511 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
1512 SV * const msv = vmess(pat, args);
1514 const char * const message = SvPV_const(msv, msglen);
1515 const I32 utf8 = SvUTF8(msv);
1519 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
1522 PL_restartop = die_where(message, msglen);
1523 SvFLAGS(ERRSV) |= utf8;
1526 write_to_stderr(message, msglen);
1530 Perl_vwarn(aTHX_ pat, args);
1534 /* implements the ckWARN? macros */
1537 Perl_ckwarn(pTHX_ U32 w)
1543 && PL_curcop->cop_warnings != pWARN_NONE
1545 PL_curcop->cop_warnings == pWARN_ALL
1546 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1547 || (unpackWARN2(w) &&
1548 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1549 || (unpackWARN3(w) &&
1550 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1551 || (unpackWARN4(w) &&
1552 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1557 isLEXWARN_off && PL_dowarn & G_WARN_ON
1562 /* implements the ckWARN?_d macro */
1565 Perl_ckwarn_d(pTHX_ U32 w)
1570 || PL_curcop->cop_warnings == pWARN_ALL
1572 PL_curcop->cop_warnings != pWARN_NONE
1574 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1575 || (unpackWARN2(w) &&
1576 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1577 || (unpackWARN3(w) &&
1578 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1579 || (unpackWARN4(w) &&
1580 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1586 /* Set buffer=NULL to get a new one. */
1588 Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
1590 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1591 PERL_UNUSED_CONTEXT;
1594 (specialWARN(buffer) ?
1595 PerlMemShared_malloc(len_wanted) :
1596 PerlMemShared_realloc(buffer, len_wanted));
1598 Copy(bits, (buffer + 1), size, char);
1602 /* since we've already done strlen() for both nam and val
1603 * we can use that info to make things faster than
1604 * sprintf(s, "%s=%s", nam, val)
1606 #define my_setenv_format(s, nam, nlen, val, vlen) \
1607 Copy(nam, s, nlen, char); \
1609 Copy(val, s+(nlen+1), vlen, char); \
1610 *(s+(nlen+1+vlen)) = '\0'
1612 #ifdef USE_ENVIRON_ARRAY
1613 /* VMS' my_setenv() is in vms.c */
1614 #if !defined(WIN32) && !defined(NETWARE)
1616 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1620 /* only parent thread can modify process environment */
1621 if (PL_curinterp == aTHX)
1624 #ifndef PERL_USE_SAFE_PUTENV
1625 if (!PL_use_safe_putenv) {
1626 /* most putenv()s leak, so we manipulate environ directly */
1627 register I32 i=setenv_getix(nam); /* where does it go? */
1630 if (environ == PL_origenviron) { /* need we copy environment? */
1636 while (environ[max])
1638 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1639 for (j=0; j<max; j++) { /* copy environment */
1640 const int len = strlen(environ[j]);
1641 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1642 Copy(environ[j], tmpenv[j], len+1, char);
1645 environ = tmpenv; /* tell exec where it is now */
1648 safesysfree(environ[i]);
1649 while (environ[i]) {
1650 environ[i] = environ[i+1];
1655 if (!environ[i]) { /* does not exist yet */
1656 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1657 environ[i+1] = NULL; /* make sure it's null terminated */
1660 safesysfree(environ[i]);
1664 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1665 /* all that work just for this */
1666 my_setenv_format(environ[i], nam, nlen, val, vlen);
1669 # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
1670 # if defined(HAS_UNSETENV)
1672 (void)unsetenv(nam);
1674 (void)setenv(nam, val, 1);
1676 # else /* ! HAS_UNSETENV */
1677 (void)setenv(nam, val, 1);
1678 # endif /* HAS_UNSETENV */
1680 # if defined(HAS_UNSETENV)
1682 (void)unsetenv(nam);
1684 const int nlen = strlen(nam);
1685 const int vlen = strlen(val);
1686 char * const new_env =
1687 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1688 my_setenv_format(new_env, nam, nlen, val, vlen);
1689 (void)putenv(new_env);
1691 # else /* ! HAS_UNSETENV */
1693 const int nlen = strlen(nam);
1699 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1700 /* all that work just for this */
1701 my_setenv_format(new_env, nam, nlen, val, vlen);
1702 (void)putenv(new_env);
1703 # endif /* HAS_UNSETENV */
1704 # endif /* __CYGWIN__ */
1705 #ifndef PERL_USE_SAFE_PUTENV
1711 #else /* WIN32 || NETWARE */
1714 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1717 register char *envstr;
1718 const int nlen = strlen(nam);
1725 Newx(envstr, nlen+vlen+2, char);
1726 my_setenv_format(envstr, nam, nlen, val, vlen);
1727 (void)PerlEnv_putenv(envstr);
1731 #endif /* WIN32 || NETWARE */
1735 Perl_setenv_getix(pTHX_ const char *nam)
1738 register const I32 len = strlen(nam);
1739 PERL_UNUSED_CONTEXT;
1741 for (i = 0; environ[i]; i++) {
1744 strnicmp(environ[i],nam,len) == 0
1746 strnEQ(environ[i],nam,len)
1748 && environ[i][len] == '=')
1749 break; /* strnEQ must come first to avoid */
1750 } /* potential SEGV's */
1753 #endif /* !PERL_MICRO */
1755 #endif /* !VMS && !EPOC*/
1757 #ifdef UNLINK_ALL_VERSIONS
1759 Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
1763 while (PerlLIO_unlink(f) >= 0)
1765 return retries ? 0 : -1;
1769 /* this is a drop-in replacement for bcopy() */
1770 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1772 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1774 char * const retval = to;
1776 if (from - to >= 0) {
1784 *(--to) = *(--from);
1790 /* this is a drop-in replacement for memset() */
1793 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1795 char * const retval = loc;
1803 /* this is a drop-in replacement for bzero() */
1804 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1806 Perl_my_bzero(register char *loc, register I32 len)
1808 char * const retval = loc;
1816 /* this is a drop-in replacement for memcmp() */
1817 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1819 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1821 register const U8 *a = (const U8 *)s1;
1822 register const U8 *b = (const U8 *)s2;
1826 if ((tmp = *a++ - *b++))
1831 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1834 /* This vsprintf replacement should generally never get used, since
1835 vsprintf was available in both System V and BSD 2.11. (There may
1836 be some cross-compilation or embedded set-ups where it is needed,
1839 If you encounter a problem in this function, it's probably a symptom
1840 that Configure failed to detect your system's vprintf() function.
1841 See the section on "item vsprintf" in the INSTALL file.
1843 This version may compile on systems with BSD-ish <stdio.h>,
1844 but probably won't on others.
1847 #ifdef USE_CHAR_VSPRINTF
1852 vsprintf(char *dest, const char *pat, void *args)
1856 #if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1857 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1858 FILE_cnt(&fakebuf) = 32767;
1860 /* These probably won't compile -- If you really need
1861 this, you'll have to figure out some other method. */
1862 fakebuf._ptr = dest;
1863 fakebuf._cnt = 32767;
1868 fakebuf._flag = _IOWRT|_IOSTRG;
1869 _doprnt(pat, args, &fakebuf); /* what a kludge */
1870 #if defined(STDIO_PTR_LVALUE)
1871 *(FILE_ptr(&fakebuf)++) = '\0';
1873 /* PerlIO has probably #defined away fputc, but we want it here. */
1875 # undef fputc /* XXX Should really restore it later */
1877 (void)fputc('\0', &fakebuf);
1879 #ifdef USE_CHAR_VSPRINTF
1882 return 0; /* perl doesn't use return value */
1886 #endif /* HAS_VPRINTF */
1889 #if BYTEORDER != 0x4321
1891 Perl_my_swap(pTHX_ short s)
1893 #if (BYTEORDER & 1) == 0
1896 result = ((s & 255) << 8) + ((s >> 8) & 255);
1904 Perl_my_htonl(pTHX_ long l)
1908 char c[sizeof(long)];
1911 #if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1912 #if BYTEORDER == 0x12345678
1915 u.c[0] = (l >> 24) & 255;
1916 u.c[1] = (l >> 16) & 255;
1917 u.c[2] = (l >> 8) & 255;
1921 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1922 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1927 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1928 u.c[o & 0xf] = (l >> s) & 255;
1936 Perl_my_ntohl(pTHX_ long l)
1940 char c[sizeof(long)];
1943 #if BYTEORDER == 0x1234
1944 u.c[0] = (l >> 24) & 255;
1945 u.c[1] = (l >> 16) & 255;
1946 u.c[2] = (l >> 8) & 255;
1950 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1951 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1958 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1959 l |= (u.c[o & 0xf] & 255) << s;
1966 #endif /* BYTEORDER != 0x4321 */
1970 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
1971 * If these functions are defined,
1972 * the BYTEORDER is neither 0x1234 nor 0x4321.
1973 * However, this is not assumed.
1977 #define HTOLE(name,type) \
1979 name (register type n) \
1983 char c[sizeof(type)]; \
1986 register U32 s = 0; \
1987 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
1988 u.c[i] = (n >> s) & 0xFF; \
1993 #define LETOH(name,type) \
1995 name (register type n) \
1999 char c[sizeof(type)]; \
2002 register U32 s = 0; \
2005 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2006 n |= ((type)(u.c[i] & 0xFF)) << s; \
2012 * Big-endian byte order functions.
2015 #define HTOBE(name,type) \
2017 name (register type n) \
2021 char c[sizeof(type)]; \
2024 register U32 s = 8*(sizeof(u.c)-1); \
2025 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2026 u.c[i] = (n >> s) & 0xFF; \
2031 #define BETOH(name,type) \
2033 name (register type n) \
2037 char c[sizeof(type)]; \
2040 register U32 s = 8*(sizeof(u.c)-1); \
2043 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2044 n |= ((type)(u.c[i] & 0xFF)) << s; \
2050 * If we just can't do it...
2053 #define NOT_AVAIL(name,type) \
2055 name (register type n) \
2057 Perl_croak_nocontext(#name "() not available"); \
2058 return n; /* not reached */ \
2062 #if defined(HAS_HTOVS) && !defined(htovs)
2065 #if defined(HAS_HTOVL) && !defined(htovl)
2068 #if defined(HAS_VTOHS) && !defined(vtohs)
2071 #if defined(HAS_VTOHL) && !defined(vtohl)
2075 #ifdef PERL_NEED_MY_HTOLE16
2077 HTOLE(Perl_my_htole16,U16)
2079 NOT_AVAIL(Perl_my_htole16,U16)
2082 #ifdef PERL_NEED_MY_LETOH16
2084 LETOH(Perl_my_letoh16,U16)
2086 NOT_AVAIL(Perl_my_letoh16,U16)
2089 #ifdef PERL_NEED_MY_HTOBE16
2091 HTOBE(Perl_my_htobe16,U16)
2093 NOT_AVAIL(Perl_my_htobe16,U16)
2096 #ifdef PERL_NEED_MY_BETOH16
2098 BETOH(Perl_my_betoh16,U16)
2100 NOT_AVAIL(Perl_my_betoh16,U16)
2104 #ifdef PERL_NEED_MY_HTOLE32
2106 HTOLE(Perl_my_htole32,U32)
2108 NOT_AVAIL(Perl_my_htole32,U32)
2111 #ifdef PERL_NEED_MY_LETOH32
2113 LETOH(Perl_my_letoh32,U32)
2115 NOT_AVAIL(Perl_my_letoh32,U32)
2118 #ifdef PERL_NEED_MY_HTOBE32
2120 HTOBE(Perl_my_htobe32,U32)
2122 NOT_AVAIL(Perl_my_htobe32,U32)
2125 #ifdef PERL_NEED_MY_BETOH32
2127 BETOH(Perl_my_betoh32,U32)
2129 NOT_AVAIL(Perl_my_betoh32,U32)
2133 #ifdef PERL_NEED_MY_HTOLE64
2135 HTOLE(Perl_my_htole64,U64)
2137 NOT_AVAIL(Perl_my_htole64,U64)
2140 #ifdef PERL_NEED_MY_LETOH64
2142 LETOH(Perl_my_letoh64,U64)
2144 NOT_AVAIL(Perl_my_letoh64,U64)
2147 #ifdef PERL_NEED_MY_HTOBE64
2149 HTOBE(Perl_my_htobe64,U64)
2151 NOT_AVAIL(Perl_my_htobe64,U64)
2154 #ifdef PERL_NEED_MY_BETOH64
2156 BETOH(Perl_my_betoh64,U64)
2158 NOT_AVAIL(Perl_my_betoh64,U64)
2162 #ifdef PERL_NEED_MY_HTOLES
2163 HTOLE(Perl_my_htoles,short)
2165 #ifdef PERL_NEED_MY_LETOHS
2166 LETOH(Perl_my_letohs,short)
2168 #ifdef PERL_NEED_MY_HTOBES
2169 HTOBE(Perl_my_htobes,short)
2171 #ifdef PERL_NEED_MY_BETOHS
2172 BETOH(Perl_my_betohs,short)
2175 #ifdef PERL_NEED_MY_HTOLEI
2176 HTOLE(Perl_my_htolei,int)
2178 #ifdef PERL_NEED_MY_LETOHI
2179 LETOH(Perl_my_letohi,int)
2181 #ifdef PERL_NEED_MY_HTOBEI
2182 HTOBE(Perl_my_htobei,int)
2184 #ifdef PERL_NEED_MY_BETOHI
2185 BETOH(Perl_my_betohi,int)
2188 #ifdef PERL_NEED_MY_HTOLEL
2189 HTOLE(Perl_my_htolel,long)
2191 #ifdef PERL_NEED_MY_LETOHL
2192 LETOH(Perl_my_letohl,long)
2194 #ifdef PERL_NEED_MY_HTOBEL
2195 HTOBE(Perl_my_htobel,long)
2197 #ifdef PERL_NEED_MY_BETOHL
2198 BETOH(Perl_my_betohl,long)
2202 Perl_my_swabn(void *ptr, int n)
2204 register char *s = (char *)ptr;
2205 register char *e = s + (n-1);
2208 for (n /= 2; n > 0; s++, e--, n--) {
2216 Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
2218 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
2221 register I32 This, that;
2227 PERL_FLUSHALL_FOR_CHILD;
2228 This = (*mode == 'w');
2232 taint_proper("Insecure %s%s", "EXEC");
2234 if (PerlProc_pipe(p) < 0)
2236 /* Try for another pipe pair for error return */
2237 if (PerlProc_pipe(pp) >= 0)
2239 while ((pid = PerlProc_fork()) < 0) {
2240 if (errno != EAGAIN) {
2241 PerlLIO_close(p[This]);
2242 PerlLIO_close(p[that]);
2244 PerlLIO_close(pp[0]);
2245 PerlLIO_close(pp[1]);
2257 /* Close parent's end of error status pipe (if any) */
2259 PerlLIO_close(pp[0]);
2260 #if defined(HAS_FCNTL) && defined(F_SETFD)
2261 /* Close error pipe automatically if exec works */
2262 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2265 /* Now dup our end of _the_ pipe to right position */
2266 if (p[THIS] != (*mode == 'r')) {
2267 PerlLIO_dup2(p[THIS], *mode == 'r');
2268 PerlLIO_close(p[THIS]);
2269 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2270 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2273 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2274 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2275 /* No automatic close - do it by hand */
2282 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2288 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
2294 do_execfree(); /* free any memory malloced by child on fork */
2296 PerlLIO_close(pp[1]);
2297 /* Keep the lower of the two fd numbers */
2298 if (p[that] < p[This]) {
2299 PerlLIO_dup2(p[This], p[that]);
2300 PerlLIO_close(p[This]);
2304 PerlLIO_close(p[that]); /* close child's end of pipe */
2307 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2309 SvUPGRADE(sv,SVt_IV);
2311 PL_forkprocess = pid;
2312 /* If we managed to get status pipe check for exec fail */
2313 if (did_pipes && pid > 0) {
2318 while (n < sizeof(int)) {
2319 n1 = PerlLIO_read(pp[0],
2320 (void*)(((char*)&errkid)+n),
2326 PerlLIO_close(pp[0]);
2328 if (n) { /* Error */
2330 PerlLIO_close(p[This]);
2331 if (n != sizeof(int))
2332 Perl_croak(aTHX_ "panic: kid popen errno read");
2334 pid2 = wait4pid(pid, &status, 0);
2335 } while (pid2 == -1 && errno == EINTR);
2336 errno = errkid; /* Propagate errno from kid */
2341 PerlLIO_close(pp[0]);
2342 return PerlIO_fdopen(p[This], mode);
2344 # ifdef OS2 /* Same, without fork()ing and all extra overhead... */
2345 return my_syspopen4(aTHX_ NULL, mode, n, args);
2347 Perl_croak(aTHX_ "List form of piped open not implemented");
2348 return (PerlIO *) NULL;
2353 /* VMS' my_popen() is in VMS.c, same with OS/2. */
2354 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2356 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2360 register I32 This, that;
2363 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
2367 PERL_FLUSHALL_FOR_CHILD;
2370 return my_syspopen(aTHX_ cmd,mode);
2373 This = (*mode == 'w');
2375 if (doexec && PL_tainting) {
2377 taint_proper("Insecure %s%s", "EXEC");
2379 if (PerlProc_pipe(p) < 0)
2381 if (doexec && PerlProc_pipe(pp) >= 0)
2383 while ((pid = PerlProc_fork()) < 0) {
2384 if (errno != EAGAIN) {
2385 PerlLIO_close(p[This]);
2386 PerlLIO_close(p[that]);
2388 PerlLIO_close(pp[0]);
2389 PerlLIO_close(pp[1]);
2392 Perl_croak(aTHX_ "Can't fork");
2405 PerlLIO_close(pp[0]);
2406 #if defined(HAS_FCNTL) && defined(F_SETFD)
2407 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2410 if (p[THIS] != (*mode == 'r')) {
2411 PerlLIO_dup2(p[THIS], *mode == 'r');
2412 PerlLIO_close(p[THIS]);
2413 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2414 PerlLIO_close(p[THAT]);
2417 PerlLIO_close(p[THAT]);
2420 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2427 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2432 /* may or may not use the shell */
2433 do_exec3(cmd, pp[1], did_pipes);
2436 #endif /* defined OS2 */
2438 #ifdef PERLIO_USING_CRLF
2439 /* Since we circumvent IO layers when we manipulate low-level
2440 filedescriptors directly, need to manually switch to the
2441 default, binary, low-level mode; see PerlIOBuf_open(). */
2442 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2445 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
2446 SvREADONLY_off(GvSV(tmpgv));
2447 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
2448 SvREADONLY_on(GvSV(tmpgv));
2450 #ifdef THREADS_HAVE_PIDS
2451 PL_ppid = (IV)getppid();
2454 #ifdef PERL_USES_PL_PIDSTATUS
2455 hv_clear(PL_pidstatus); /* we have no children */
2461 do_execfree(); /* free any memory malloced by child on vfork */
2463 PerlLIO_close(pp[1]);
2464 if (p[that] < p[This]) {
2465 PerlLIO_dup2(p[This], p[that]);
2466 PerlLIO_close(p[This]);
2470 PerlLIO_close(p[that]);
2473 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2475 SvUPGRADE(sv,SVt_IV);
2477 PL_forkprocess = pid;
2478 if (did_pipes && pid > 0) {
2483 while (n < sizeof(int)) {
2484 n1 = PerlLIO_read(pp[0],
2485 (void*)(((char*)&errkid)+n),
2491 PerlLIO_close(pp[0]);
2493 if (n) { /* Error */
2495 PerlLIO_close(p[This]);
2496 if (n != sizeof(int))
2497 Perl_croak(aTHX_ "panic: kid popen errno read");
2499 pid2 = wait4pid(pid, &status, 0);
2500 } while (pid2 == -1 && errno == EINTR);
2501 errno = errkid; /* Propagate errno from kid */
2506 PerlLIO_close(pp[0]);
2507 return PerlIO_fdopen(p[This], mode);
2510 #if defined(atarist) || defined(EPOC)
2513 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2515 PERL_FLUSHALL_FOR_CHILD;
2516 /* Call system's popen() to get a FILE *, then import it.
2517 used 0 for 2nd parameter to PerlIO_importFILE;
2520 return PerlIO_importFILE(popen(cmd, mode), 0);
2524 FILE *djgpp_popen();
2526 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2528 PERL_FLUSHALL_FOR_CHILD;
2529 /* Call system's popen() to get a FILE *, then import it.
2530 used 0 for 2nd parameter to PerlIO_importFILE;
2533 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2536 #if defined(__LIBCATAMOUNT__)
2538 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2546 #endif /* !DOSISH */
2548 /* this is called in parent before the fork() */
2550 Perl_atfork_lock(void)
2553 #if defined(USE_ITHREADS)
2554 /* locks must be held in locking order (if any) */
2556 MUTEX_LOCK(&PL_malloc_mutex);
2562 /* this is called in both parent and child after the fork() */
2564 Perl_atfork_unlock(void)
2567 #if defined(USE_ITHREADS)
2568 /* locks must be released in same order as in atfork_lock() */
2570 MUTEX_UNLOCK(&PL_malloc_mutex);
2579 #if defined(HAS_FORK)
2581 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2586 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2587 * handlers elsewhere in the code */
2592 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2593 Perl_croak_nocontext("fork() not available");
2595 #endif /* HAS_FORK */
2600 Perl_dump_fds(pTHX_ const char *const s)
2605 PerlIO_printf(Perl_debug_log,"%s", s);
2606 for (fd = 0; fd < 32; fd++) {
2607 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2608 PerlIO_printf(Perl_debug_log," %d",fd);
2610 PerlIO_printf(Perl_debug_log,"\n");
2613 #endif /* DUMP_FDS */
2617 dup2(int oldfd, int newfd)
2619 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2622 PerlLIO_close(newfd);
2623 return fcntl(oldfd, F_DUPFD, newfd);
2625 #define DUP2_MAX_FDS 256
2626 int fdtmp[DUP2_MAX_FDS];
2632 PerlLIO_close(newfd);
2633 /* good enough for low fd's... */
2634 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2635 if (fdx >= DUP2_MAX_FDS) {
2643 PerlLIO_close(fdtmp[--fdx]);
2650 #ifdef HAS_SIGACTION
2652 #ifdef MACOS_TRADITIONAL
2653 /* We don't want restart behavior on MacOS */
2658 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2661 struct sigaction act, oact;
2664 /* only "parent" interpreter can diddle signals */
2665 if (PL_curinterp != aTHX)
2666 return (Sighandler_t) SIG_ERR;
2669 act.sa_handler = (void(*)(int))handler;
2670 sigemptyset(&act.sa_mask);
2673 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2674 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2676 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2677 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2678 act.sa_flags |= SA_NOCLDWAIT;
2680 if (sigaction(signo, &act, &oact) == -1)
2681 return (Sighandler_t) SIG_ERR;
2683 return (Sighandler_t) oact.sa_handler;
2687 Perl_rsignal_state(pTHX_ int signo)
2689 struct sigaction oact;
2690 PERL_UNUSED_CONTEXT;
2692 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2693 return (Sighandler_t) SIG_ERR;
2695 return (Sighandler_t) oact.sa_handler;
2699 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2702 struct sigaction act;
2705 /* only "parent" interpreter can diddle signals */
2706 if (PL_curinterp != aTHX)
2710 act.sa_handler = (void(*)(int))handler;
2711 sigemptyset(&act.sa_mask);
2714 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2715 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2717 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2718 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2719 act.sa_flags |= SA_NOCLDWAIT;
2721 return sigaction(signo, &act, save);
2725 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2729 /* only "parent" interpreter can diddle signals */
2730 if (PL_curinterp != aTHX)
2734 return sigaction(signo, save, (struct sigaction *)NULL);
2737 #else /* !HAS_SIGACTION */
2740 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2742 #if defined(USE_ITHREADS) && !defined(WIN32)
2743 /* only "parent" interpreter can diddle signals */
2744 if (PL_curinterp != aTHX)
2745 return (Sighandler_t) SIG_ERR;
2748 return PerlProc_signal(signo, handler);
2759 Perl_rsignal_state(pTHX_ int signo)
2762 Sighandler_t oldsig;
2764 #if defined(USE_ITHREADS) && !defined(WIN32)
2765 /* only "parent" interpreter can diddle signals */
2766 if (PL_curinterp != aTHX)
2767 return (Sighandler_t) SIG_ERR;
2771 oldsig = PerlProc_signal(signo, sig_trap);
2772 PerlProc_signal(signo, oldsig);
2774 PerlProc_kill(PerlProc_getpid(), signo);
2779 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2781 #if defined(USE_ITHREADS) && !defined(WIN32)
2782 /* only "parent" interpreter can diddle signals */
2783 if (PL_curinterp != aTHX)
2786 *save = PerlProc_signal(signo, handler);
2787 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
2791 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2793 #if defined(USE_ITHREADS) && !defined(WIN32)
2794 /* only "parent" interpreter can diddle signals */
2795 if (PL_curinterp != aTHX)
2798 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
2801 #endif /* !HAS_SIGACTION */
2802 #endif /* !PERL_MICRO */
2804 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2805 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2807 Perl_my_pclose(pTHX_ PerlIO *ptr)
2810 Sigsave_t hstat, istat, qstat;
2816 int saved_errno = 0;
2818 int saved_win32_errno;
2822 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2824 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2826 *svp = &PL_sv_undef;
2828 if (pid == -1) { /* Opened by popen. */
2829 return my_syspclose(ptr);
2832 if ((close_failed = (PerlIO_close(ptr) == EOF))) {
2833 saved_errno = errno;
2835 saved_win32_errno = GetLastError();
2839 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2842 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2843 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2844 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
2847 pid2 = wait4pid(pid, &status, 0);
2848 } while (pid2 == -1 && errno == EINTR);
2850 rsignal_restore(SIGHUP, &hstat);
2851 rsignal_restore(SIGINT, &istat);
2852 rsignal_restore(SIGQUIT, &qstat);
2855 SETERRNO(saved_errno, 0);
2858 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2861 #if defined(__LIBCATAMOUNT__)
2863 Perl_my_pclose(pTHX_ PerlIO *ptr)
2868 #endif /* !DOSISH */
2870 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) && !defined(__LIBCATAMOUNT__)
2872 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2878 #ifdef PERL_USES_PL_PIDSTATUS
2881 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2882 pid, rather than a string form. */
2883 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
2884 if (svp && *svp != &PL_sv_undef) {
2885 *statusp = SvIVX(*svp);
2886 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2894 hv_iterinit(PL_pidstatus);
2895 if ((entry = hv_iternext(PL_pidstatus))) {
2896 SV * const sv = hv_iterval(PL_pidstatus,entry);
2898 const char * const spid = hv_iterkey(entry,&len);
2900 assert (len == sizeof(Pid_t));
2901 memcpy((char *)&pid, spid, len);
2902 *statusp = SvIVX(sv);
2903 /* The hash iterator is currently on this entry, so simply
2904 calling hv_delete would trigger the lazy delete, which on
2905 aggregate does more work, beacuse next call to hv_iterinit()
2906 would spot the flag, and have to call the delete routine,
2907 while in the meantime any new entries can't re-use that
2909 hv_iterinit(PL_pidstatus);
2910 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
2917 # ifdef HAS_WAITPID_RUNTIME
2918 if (!HAS_WAITPID_RUNTIME)
2921 result = PerlProc_waitpid(pid,statusp,flags);
2924 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2925 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
2928 #ifdef PERL_USES_PL_PIDSTATUS
2929 #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
2934 Perl_croak(aTHX_ "Can't do waitpid with flags");
2936 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2937 pidgone(result,*statusp);
2943 #if defined(HAS_WAITPID) || defined(HAS_WAIT4)
2946 if (result < 0 && errno == EINTR) {
2951 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2953 #ifdef PERL_USES_PL_PIDSTATUS
2955 Perl_pidgone(pTHX_ Pid_t pid, int status)
2959 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
2960 SvUPGRADE(sv,SVt_IV);
2961 SvIV_set(sv, status);
2966 #if defined(atarist) || defined(OS2) || defined(EPOC)
2969 int /* Cannot prototype with I32
2971 my_syspclose(PerlIO *ptr)
2974 Perl_my_pclose(pTHX_ PerlIO *ptr)
2977 /* Needs work for PerlIO ! */
2978 FILE * const f = PerlIO_findFILE(ptr);
2979 const I32 result = pclose(f);
2980 PerlIO_releaseFILE(ptr,f);
2988 Perl_my_pclose(pTHX_ PerlIO *ptr)
2990 /* Needs work for PerlIO ! */
2991 FILE * const f = PerlIO_findFILE(ptr);
2992 I32 result = djgpp_pclose(f);
2993 result = (result << 8) & 0xff00;
2994 PerlIO_releaseFILE(ptr,f);
3000 Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
3003 register const char * const frombase = from;
3004 PERL_UNUSED_CONTEXT;
3007 register const char c = *from;
3012 while (count-- > 0) {
3013 for (todo = len; todo > 0; todo--) {
3022 Perl_same_dirent(pTHX_ const char *a, const char *b)
3024 char *fa = strrchr(a,'/');
3025 char *fb = strrchr(b,'/');
3028 SV * const tmpsv = sv_newmortal();
3041 sv_setpvn(tmpsv, ".", 1);
3043 sv_setpvn(tmpsv, a, fa - a);
3044 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
3047 sv_setpvn(tmpsv, ".", 1);
3049 sv_setpvn(tmpsv, b, fb - b);
3050 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
3052 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3053 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3055 #endif /* !HAS_RENAME */
3058 Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3059 const char *const *const search_ext, I32 flags)
3062 const char *xfound = NULL;
3063 char *xfailed = NULL;
3064 char tmpbuf[MAXPATHLEN];
3069 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3070 # define SEARCH_EXTS ".bat", ".cmd", NULL
3071 # define MAX_EXT_LEN 4
3074 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3075 # define MAX_EXT_LEN 4
3078 # define SEARCH_EXTS ".pl", ".com", NULL
3079 # define MAX_EXT_LEN 4
3081 /* additional extensions to try in each dir if scriptname not found */
3083 static const char *const exts[] = { SEARCH_EXTS };
3084 const char *const *const ext = search_ext ? search_ext : exts;
3085 int extidx = 0, i = 0;
3086 const char *curext = NULL;
3088 PERL_UNUSED_ARG(search_ext);
3089 # define MAX_EXT_LEN 0
3093 * If dosearch is true and if scriptname does not contain path
3094 * delimiters, search the PATH for scriptname.
3096 * If SEARCH_EXTS is also defined, will look for each
3097 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3098 * while searching the PATH.
3100 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3101 * proceeds as follows:
3102 * If DOSISH or VMSISH:
3103 * + look for ./scriptname{,.foo,.bar}
3104 * + search the PATH for scriptname{,.foo,.bar}
3107 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3108 * this will not look in '.' if it's not in the PATH)
3113 # ifdef ALWAYS_DEFTYPES
3114 len = strlen(scriptname);
3115 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3116 int idx = 0, deftypes = 1;
3119 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
3122 int idx = 0, deftypes = 1;
3125 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
3127 /* The first time through, just add SEARCH_EXTS to whatever we
3128 * already have, so we can check for default file types. */
3130 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
3136 if ((strlen(tmpbuf) + strlen(scriptname)
3137 + MAX_EXT_LEN) >= sizeof tmpbuf)
3138 continue; /* don't search dir with too-long name */
3139 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
3143 if (strEQ(scriptname, "-"))
3145 if (dosearch) { /* Look in '.' first. */
3146 const char *cur = scriptname;
3148 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3150 if (strEQ(ext[i++],curext)) {
3151 extidx = -1; /* already has an ext */
3156 DEBUG_p(PerlIO_printf(Perl_debug_log,
3157 "Looking for %s\n",cur));
3158 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3159 && !S_ISDIR(PL_statbuf.st_mode)) {
3167 if (cur == scriptname) {
3168 len = strlen(scriptname);
3169 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
3171 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3174 } while (extidx >= 0 && ext[extidx] /* try an extension? */
3175 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
3180 #ifdef MACOS_TRADITIONAL
3181 if (dosearch && !strchr(scriptname, ':') &&
3182 (s = PerlEnv_getenv("Commands")))
3184 if (dosearch && !strchr(scriptname, '/')
3186 && !strchr(scriptname, '\\')
3188 && (s = PerlEnv_getenv("PATH")))
3193 bufend = s + strlen(s);
3194 while (s < bufend) {
3195 #ifdef MACOS_TRADITIONAL
3196 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3200 #if defined(atarist) || defined(DOSISH)
3205 && *s != ';'; len++, s++) {
3206 if (len < sizeof tmpbuf)
3209 if (len < sizeof tmpbuf)
3211 #else /* ! (atarist || DOSISH) */
3212 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3215 #endif /* ! (atarist || DOSISH) */
3216 #endif /* MACOS_TRADITIONAL */
3219 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
3220 continue; /* don't search dir with too-long name */
3221 #ifdef MACOS_TRADITIONAL
3222 if (len && tmpbuf[len - 1] != ':')
3223 tmpbuf[len++] = ':';
3226 # if defined(atarist) || defined(__MINT__) || defined(DOSISH)
3227 && tmpbuf[len - 1] != '/'
3228 && tmpbuf[len - 1] != '\\'
3231 tmpbuf[len++] = '/';
3232 if (len == 2 && tmpbuf[0] == '.')
3235 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3239 len = strlen(tmpbuf);
3240 if (extidx > 0) /* reset after previous loop */
3244 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3245 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
3246 if (S_ISDIR(PL_statbuf.st_mode)) {
3250 } while ( retval < 0 /* not there */
3251 && extidx>=0 && ext[extidx] /* try an extension? */
3252 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
3257 if (S_ISREG(PL_statbuf.st_mode)
3258 && cando(S_IRUSR,TRUE,&PL_statbuf)
3259 #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
3260 && cando(S_IXUSR,TRUE,&PL_statbuf)
3264 xfound = tmpbuf; /* bingo! */
3268 xfailed = savepv(tmpbuf);
3271 if (!xfound && !seen_dot && !xfailed &&
3272 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
3273 || S_ISDIR(PL_statbuf.st_mode)))
3275 seen_dot = 1; /* Disable message. */
3277 if (flags & 1) { /* do or die? */
3278 Perl_croak(aTHX_ "Can't %s %s%s%s",
3279 (xfailed ? "execute" : "find"),
3280 (xfailed ? xfailed : scriptname),
3281 (xfailed ? "" : " on PATH"),
3282 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3287 scriptname = xfound;
3289 return (scriptname ? savepv(scriptname) : NULL);
3292 #ifndef PERL_GET_CONTEXT_DEFINED
3295 Perl_get_context(void)
3298 #if defined(USE_ITHREADS)
3299 # ifdef OLD_PTHREADS_API
3301 if (pthread_getspecific(PL_thr_key, &t))
3302 Perl_croak_nocontext("panic: pthread_getspecific");
3305 # ifdef I_MACH_CTHREADS
3306 return (void*)cthread_data(cthread_self());
3308 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3317 Perl_set_context(void *t)
3320 #if defined(USE_ITHREADS)
3321 # ifdef I_MACH_CTHREADS
3322 cthread_set_data(cthread_self(), t);
3324 if (pthread_setspecific(PL_thr_key, t))
3325 Perl_croak_nocontext("panic: pthread_setspecific");
3332 #endif /* !PERL_GET_CONTEXT_DEFINED */
3334 #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
3343 Perl_get_op_names(pTHX)
3345 PERL_UNUSED_CONTEXT;
3346 return (char **)PL_op_name;
3350 Perl_get_op_descs(pTHX)
3352 PERL_UNUSED_CONTEXT;
3353 return (char **)PL_op_desc;
3357 Perl_get_no_modify(pTHX)
3359 PERL_UNUSED_CONTEXT;
3360 return PL_no_modify;
3364 Perl_get_opargs(pTHX)
3366 PERL_UNUSED_CONTEXT;
3367 return (U32 *)PL_opargs;
3371 Perl_get_ppaddr(pTHX)
3374 PERL_UNUSED_CONTEXT;
3375 return (PPADDR_t*)PL_ppaddr;
3378 #ifndef HAS_GETENV_LEN
3380 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
3382 char * const env_trans = PerlEnv_getenv(env_elem);
3383 PERL_UNUSED_CONTEXT;
3385 *len = strlen(env_trans);
3392 Perl_get_vtbl(pTHX_ int vtbl_id)
3394 const MGVTBL* result;
3395 PERL_UNUSED_CONTEXT;
3399 result = &PL_vtbl_sv;
3402 result = &PL_vtbl_env;
3404 case want_vtbl_envelem:
3405 result = &PL_vtbl_envelem;
3408 result = &PL_vtbl_sig;
3410 case want_vtbl_sigelem:
3411 result = &PL_vtbl_sigelem;
3413 case want_vtbl_pack:
3414 result = &PL_vtbl_pack;
3416 case want_vtbl_packelem:
3417 result = &PL_vtbl_packelem;
3419 case want_vtbl_dbline:
3420 result = &PL_vtbl_dbline;
3423 result = &PL_vtbl_isa;
3425 case want_vtbl_isaelem:
3426 result = &PL_vtbl_isaelem;
3428 case want_vtbl_arylen:
3429 result = &PL_vtbl_arylen;
3431 case want_vtbl_mglob:
3432 result = &PL_vtbl_mglob;
3434 case want_vtbl_nkeys:
3435 result = &PL_vtbl_nkeys;
3437 case want_vtbl_taint:
3438 result = &PL_vtbl_taint;
3440 case want_vtbl_substr:
3441 result = &PL_vtbl_substr;
3444 result = &PL_vtbl_vec;
3447 result = &PL_vtbl_pos;
3450 result = &PL_vtbl_bm;
3453 result = &PL_vtbl_fm;
3455 case want_vtbl_uvar:
3456 result = &PL_vtbl_uvar;
3458 case want_vtbl_defelem:
3459 result = &PL_vtbl_defelem;
3461 case want_vtbl_regexp:
3462 result = &PL_vtbl_regexp;
3464 case want_vtbl_regdata:
3465 result = &PL_vtbl_regdata;
3467 case want_vtbl_regdatum:
3468 result = &PL_vtbl_regdatum;
3470 #ifdef USE_LOCALE_COLLATE
3471 case want_vtbl_collxfrm:
3472 result = &PL_vtbl_collxfrm;
3475 case want_vtbl_amagic:
3476 result = &PL_vtbl_amagic;
3478 case want_vtbl_amagicelem:
3479 result = &PL_vtbl_amagicelem;
3481 case want_vtbl_backref:
3482 result = &PL_vtbl_backref;
3484 case want_vtbl_utf8:
3485 result = &PL_vtbl_utf8;
3491 return (MGVTBL*)result;
3495 Perl_my_fflush_all(pTHX)
3497 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3498 return PerlIO_flush(NULL);
3500 # if defined(HAS__FWALK)
3501 extern int fflush(FILE *);
3502 /* undocumented, unprototyped, but very useful BSDism */
3503 extern void _fwalk(int (*)(FILE *));
3507 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3509 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3510 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3512 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3513 open_max = sysconf(_SC_OPEN_MAX);
3516 open_max = FOPEN_MAX;
3519 open_max = OPEN_MAX;
3530 for (i = 0; i < open_max; i++)
3531 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3532 STDIO_STREAM_ARRAY[i]._file < open_max &&
3533 STDIO_STREAM_ARRAY[i]._flag)
3534 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3538 SETERRNO(EBADF,RMS_IFI);
3545 Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
3547 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
3549 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3550 if (ckWARN(WARN_IO)) {
3551 const char * const direction =
3552 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3554 Perl_warner(aTHX_ packWARN(WARN_IO),
3555 "Filehandle %s opened only for %sput",
3558 Perl_warner(aTHX_ packWARN(WARN_IO),
3559 "Filehandle opened only for %sput", direction);
3566 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3568 warn_type = WARN_CLOSED;
3572 warn_type = WARN_UNOPENED;
3575 if (ckWARN(warn_type)) {
3576 const char * const pars =
3577 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
3578 const char * const func =
3580 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3581 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3582 op < 0 ? "" : /* handle phoney cases */
3584 const char * const type =
3586 (OP_IS_SOCKET(op) ||
3587 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3588 "socket" : "filehandle");
3589 if (name && *name) {
3590 Perl_warner(aTHX_ packWARN(warn_type),
3591 "%s%s on %s %s %s", func, pars, vile, type, name);
3592 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3594 aTHX_ packWARN(warn_type),
3595 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3600 Perl_warner(aTHX_ packWARN(warn_type),
3601 "%s%s on %s %s", func, pars, vile, type);
3602 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3604 aTHX_ packWARN(warn_type),
3605 "\t(Are you trying to call %s%s on dirhandle?)\n",
3614 /* in ASCII order, not that it matters */
3615 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3618 Perl_ebcdic_control(pTHX_ int ch)
3626 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3627 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3630 if (ctlp == controllablechars)
3631 return('\177'); /* DEL */
3633 return((unsigned char)(ctlp - controllablechars - 1));
3634 } else { /* Want uncontrol */
3635 if (ch == '\177' || ch == -1)
3637 else if (ch == '\157')
3639 else if (ch == '\174')
3641 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3643 else if (ch == '\155')
3645 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3646 return(controllablechars[ch+1]);
3648 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3653 /* To workaround core dumps from the uninitialised tm_zone we get the
3654 * system to give us a reasonable struct to copy. This fix means that
3655 * strftime uses the tm_zone and tm_gmtoff values returned by
3656 * localtime(time()). That should give the desired result most of the
3657 * time. But probably not always!
3659 * This does not address tzname aspects of NETaa14816.
3664 # ifndef STRUCT_TM_HASZONE
3665 # define STRUCT_TM_HASZONE
3669 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3670 # ifndef HAS_TM_TM_ZONE
3671 # define HAS_TM_TM_ZONE
3676 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3678 #ifdef HAS_TM_TM_ZONE
3680 const struct tm* my_tm;
3682 my_tm = localtime(&now);
3684 Copy(my_tm, ptm, 1, struct tm);
3686 PERL_UNUSED_ARG(ptm);
3691 * mini_mktime - normalise struct tm values without the localtime()
3692 * semantics (and overhead) of mktime().
3695 Perl_mini_mktime(pTHX_ struct tm *ptm)
3699 int month, mday, year, jday;
3700 int odd_cent, odd_year;
3701 PERL_UNUSED_CONTEXT;
3703 #define DAYS_PER_YEAR 365
3704 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3705 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3706 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3707 #define SECS_PER_HOUR (60*60)
3708 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3709 /* parentheses deliberately absent on these two, otherwise they don't work */
3710 #define MONTH_TO_DAYS 153/5
3711 #define DAYS_TO_MONTH 5/153
3712 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3713 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3714 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3715 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3718 * Year/day algorithm notes:
3720 * With a suitable offset for numeric value of the month, one can find
3721 * an offset into the year by considering months to have 30.6 (153/5) days,
3722 * using integer arithmetic (i.e., with truncation). To avoid too much
3723 * messing about with leap days, we consider January and February to be
3724 * the 13th and 14th month of the previous year. After that transformation,
3725 * we need the month index we use to be high by 1 from 'normal human' usage,
3726 * so the month index values we use run from 4 through 15.
3728 * Given that, and the rules for the Gregorian calendar (leap years are those
3729 * divisible by 4 unless also divisible by 100, when they must be divisible
3730 * by 400 instead), we can simply calculate the number of days since some
3731 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3732 * the days we derive from our month index, and adding in the day of the
3733 * month. The value used here is not adjusted for the actual origin which
3734 * it normally would use (1 January A.D. 1), since we're not exposing it.
3735 * We're only building the value so we can turn around and get the
3736 * normalised values for the year, month, day-of-month, and day-of-year.
3738 * For going backward, we need to bias the value we're using so that we find
3739 * the right year value. (Basically, we don't want the contribution of
3740 * March 1st to the number to apply while deriving the year). Having done
3741 * that, we 'count up' the contribution to the year number by accounting for
3742 * full quadracenturies (400-year periods) with their extra leap days, plus
3743 * the contribution from full centuries (to avoid counting in the lost leap
3744 * days), plus the contribution from full quad-years (to count in the normal
3745 * leap days), plus the leftover contribution from any non-leap years.
3746 * At this point, if we were working with an actual leap day, we'll have 0
3747 * days left over. This is also true for March 1st, however. So, we have
3748 * to special-case that result, and (earlier) keep track of the 'odd'
3749 * century and year contributions. If we got 4 extra centuries in a qcent,
3750 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3751 * Otherwise, we add back in the earlier bias we removed (the 123 from
3752 * figuring in March 1st), find the month index (integer division by 30.6),
3753 * and the remainder is the day-of-month. We then have to convert back to
3754 * 'real' months (including fixing January and February from being 14/15 in
3755 * the previous year to being in the proper year). After that, to get
3756 * tm_yday, we work with the normalised year and get a new yearday value for
3757 * January 1st, which we subtract from the yearday value we had earlier,
3758 * representing the date we've re-built. This is done from January 1
3759 * because tm_yday is 0-origin.
3761 * Since POSIX time routines are only guaranteed to work for times since the
3762 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3763 * applies Gregorian calendar rules even to dates before the 16th century
3764 * doesn't bother me. Besides, you'd need cultural context for a given
3765 * date to know whether it was Julian or Gregorian calendar, and that's
3766 * outside the scope for this routine. Since we convert back based on the
3767 * same rules we used to build the yearday, you'll only get strange results
3768 * for input which needed normalising, or for the 'odd' century years which
3769 * were leap years in the Julian calander but not in the Gregorian one.
3770 * I can live with that.
3772 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3773 * that's still outside the scope for POSIX time manipulation, so I don't
3777 year = 1900 + ptm->tm_year;
3778 month = ptm->tm_mon;
3779 mday = ptm->tm_mday;
3780 /* allow given yday with no month & mday to dominate the result */
3781 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3784 jday = 1 + ptm->tm_yday;
3793 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3794 yearday += month*MONTH_TO_DAYS + mday + jday;
3796 * Note that we don't know when leap-seconds were or will be,
3797 * so we have to trust the user if we get something which looks
3798 * like a sensible leap-second. Wild values for seconds will
3799 * be rationalised, however.
3801 if ((unsigned) ptm->tm_sec <= 60) {
3808 secs += 60 * ptm->tm_min;
3809 secs += SECS_PER_HOUR * ptm->tm_hour;
3811 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3812 /* got negative remainder, but need positive time */
3813 /* back off an extra day to compensate */
3814 yearday += (secs/SECS_PER_DAY)-1;
3815 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3818 yearday += (secs/SECS_PER_DAY);
3819 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3822 else if (secs >= SECS_PER_DAY) {
3823 yearday += (secs/SECS_PER_DAY);
3824 secs %= SECS_PER_DAY;
3826 ptm->tm_hour = secs/SECS_PER_HOUR;
3827 secs %= SECS_PER_HOUR;
3828 ptm->tm_min = secs/60;
3830 ptm->tm_sec += secs;
3831 /* done with time of day effects */
3833 * The algorithm for yearday has (so far) left it high by 428.
3834 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3835 * bias it by 123 while trying to figure out what year it
3836 * really represents. Even with this tweak, the reverse
3837 * translation fails for years before A.D. 0001.
3838 * It would still fail for Feb 29, but we catch that one below.
3840 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3841 yearday -= YEAR_ADJUST;
3842 year = (yearday / DAYS_PER_QCENT) * 400;
3843 yearday %= DAYS_PER_QCENT;
3844 odd_cent = yearday / DAYS_PER_CENT;
3845 year += odd_cent * 100;
3846 yearday %= DAYS_PER_CENT;
3847 year += (yearday / DAYS_PER_QYEAR) * 4;
3848 yearday %= DAYS_PER_QYEAR;
3849 odd_year = yearday / DAYS_PER_YEAR;
3851 yearday %= DAYS_PER_YEAR;
3852 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3857 yearday += YEAR_ADJUST; /* recover March 1st crock */
3858 month = yearday*DAYS_TO_MONTH;
3859 yearday -= month*MONTH_TO_DAYS;
3860 /* recover other leap-year adjustment */
3869 ptm->tm_year = year - 1900;
3871 ptm->tm_mday = yearday;
3872 ptm->tm_mon = month;
3876 ptm->tm_mon = month - 1;
3878 /* re-build yearday based on Jan 1 to get tm_yday */
3880 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3881 yearday += 14*MONTH_TO_DAYS + 1;
3882 ptm->tm_yday = jday - yearday;
3883 /* fix tm_wday if not overridden by caller */
3884 if ((unsigned)ptm->tm_wday > 6)
3885 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3889 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)
3897 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3900 mytm.tm_hour = hour;
3901 mytm.tm_mday = mday;
3903 mytm.tm_year = year;
3904 mytm.tm_wday = wday;
3905 mytm.tm_yday = yday;
3906 mytm.tm_isdst = isdst;
3908 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3909 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3914 #ifdef HAS_TM_TM_GMTOFF
3915 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3917 #ifdef HAS_TM_TM_ZONE
3918 mytm.tm_zone = mytm2.tm_zone;
3923 Newx(buf, buflen, char);
3924 len = strftime(buf, buflen, fmt, &mytm);
3926 ** The following is needed to handle to the situation where
3927 ** tmpbuf overflows. Basically we want to allocate a buffer
3928 ** and try repeatedly. The reason why it is so complicated
3929 ** is that getting a return value of 0 from strftime can indicate
3930 ** one of the following:
3931 ** 1. buffer overflowed,
3932 ** 2. illegal conversion specifier, or
3933 ** 3. the format string specifies nothing to be returned(not
3934 ** an error). This could be because format is an empty string
3935 ** or it specifies %p that yields an empty string in some locale.
3936 ** If there is a better way to make it portable, go ahead by
3939 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3942 /* Possibly buf overflowed - try again with a bigger buf */
3943 const int fmtlen = strlen(fmt);
3944 int bufsize = fmtlen + buflen;
3946 Newx(buf, bufsize, char);
3948 buflen = strftime(buf, bufsize, fmt, &mytm);
3949 if (buflen > 0 && buflen < bufsize)
3951 /* heuristic to prevent out-of-memory errors */
3952 if (bufsize > 100*fmtlen) {
3958 Renew(buf, bufsize, char);
3963 Perl_croak(aTHX_ "panic: no strftime");
3969 #define SV_CWD_RETURN_UNDEF \
3970 sv_setsv(sv, &PL_sv_undef); \
3973 #define SV_CWD_ISDOT(dp) \
3974 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
3975 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
3978 =head1 Miscellaneous Functions
3980 =for apidoc getcwd_sv
3982 Fill the sv with current working directory
3987 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
3988 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
3989 * getcwd(3) if available
3990 * Comments from the orignal:
3991 * This is a faster version of getcwd. It's also more dangerous
3992 * because you might chdir out of a directory that you can't chdir
3996 Perl_getcwd_sv(pTHX_ register SV *sv)
4000 #ifndef INCOMPLETE_TAINTS
4006 char buf[MAXPATHLEN];
4008 /* Some getcwd()s automatically allocate a buffer of the given
4009 * size from the heap if they are given a NULL buffer pointer.
4010 * The problem is that this behaviour is not portable. */
4011 if (getcwd(buf, sizeof(buf) - 1)) {
4016 sv_setsv(sv, &PL_sv_undef);
4024 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4028 SvUPGRADE(sv, SVt_PV);
4030 if (PerlLIO_lstat(".", &statbuf) < 0) {
4031 SV_CWD_RETURN_UNDEF;
4034 orig_cdev = statbuf.st_dev;
4035 orig_cino = statbuf.st_ino;
4044 if (PerlDir_chdir("..") < 0) {
4045 SV_CWD_RETURN_UNDEF;
4047 if (PerlLIO_stat(".", &statbuf) < 0) {
4048 SV_CWD_RETURN_UNDEF;
4051 cdev = statbuf.st_dev;
4052 cino = statbuf.st_ino;
4054 if (odev == cdev && oino == cino) {
4057 if (!(dir = PerlDir_open("."))) {
4058 SV_CWD_RETURN_UNDEF;
4061 while ((dp = PerlDir_read(dir)) != NULL) {
4063 const int namelen = dp->d_namlen;
4065 const int namelen = strlen(dp->d_name);
4068 if (SV_CWD_ISDOT(dp)) {
4072 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
4073 SV_CWD_RETURN_UNDEF;
4076 tdev = statbuf.st_dev;
4077 tino = statbuf.st_ino;
4078 if (tino == oino && tdev == odev) {
4084 SV_CWD_RETURN_UNDEF;
4087 if (pathlen + namelen + 1 >= MAXPATHLEN) {
4088 SV_CWD_RETURN_UNDEF;
4091 SvGROW(sv, pathlen + namelen + 1);
4095 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4098 /* prepend current directory to the front */
4100 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4101 pathlen += (namelen + 1);
4103 #ifdef VOID_CLOSEDIR
4106 if (PerlDir_close(dir) < 0) {
4107 SV_CWD_RETURN_UNDEF;
4113 SvCUR_set(sv, pathlen);
4117 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
4118 SV_CWD_RETURN_UNDEF;
4121 if (PerlLIO_stat(".", &statbuf) < 0) {
4122 SV_CWD_RETURN_UNDEF;
4125 cdev = statbuf.st_dev;
4126 cino = statbuf.st_ino;
4128 if (cdev != orig_cdev || cino != orig_cino) {
4129 Perl_croak(aTHX_ "Unstable directory path, "
4130 "current directory changed unexpectedly");
4141 #define VERSION_MAX 0x7FFFFFFF
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)
4174 AV * const av = newAV();
4175 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
4176 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4178 while (isSPACE(*s)) /* leading whitespace is OK */
4184 s++; /* get past 'v' */
4185 qv = 1; /* force quoted version processing */
4190 /* pre-scan the input string to check for decimals/underbars */
4191 while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
4196 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
4200 else if ( *pos == '_' )
4203 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
4205 width = pos - last - 1; /* natural width of sub-version */
4210 if ( alpha && !saw_period )
4211 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4213 if ( alpha && saw_period && width == 0 )
4214 Perl_croak(aTHX_ "Invalid version format (misplaced _ in number)");
4216 if ( saw_period > 1 )
4217 qv = 1; /* force quoted version processing */
4223 (void)hv_stores((HV *)hv, "qv", newSViv(qv));
4225 (void)hv_stores((HV *)hv, "alpha", newSViv(alpha));
4226 if ( !qv && width < 3 )
4227 (void)hv_stores((HV *)hv, "width", newSViv(width));
4229 while (isDIGIT(*pos))
4231 if (!isALPHA(*pos)) {
4237 /* this is atoi() that delimits on underscores */
4238 const char *end = pos;
4242 /* the following if() will only be true after the decimal
4243 * point of a version originally created with a bare
4244 * floating point number, i.e. not quoted in any way
4246 if ( !qv && s > start && saw_period == 1 ) {
4250 rev += (*s - '0') * mult;
4252 if ( (PERL_ABS(orev) > PERL_ABS(rev))
4253 || (PERL_ABS(rev) > VERSION_MAX )) {
4254 if(ckWARN(WARN_OVERFLOW))
4255 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
4256 "Integer overflow in version %d",VERSION_MAX);
4267 while (--end >= s) {
4269 rev += (*end - '0') * mult;
4271 if ( (PERL_ABS(orev) > PERL_ABS(rev))
4272 || (PERL_ABS(rev) > VERSION_MAX )) {
4273 if(ckWARN(WARN_OVERFLOW))
4274 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
4275 "Integer overflow in version");
4284 /* Append revision */
4285 av_push(av, newSViv(rev));
4290 else if ( *pos == '.' )
4292 else if ( *pos == '_' && isDIGIT(pos[1]) )
4294 else if ( isDIGIT(*pos) )
4301 while ( isDIGIT(*pos) )
4306 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4314 if ( qv ) { /* quoted versions always get at least three terms*/
4315 I32 len = av_len(av);
4316 /* This for loop appears to trigger a compiler bug on OS X, as it
4317 loops infinitely. Yes, len is negative. No, it makes no sense.
4318 Compiler in question is:
4319 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4320 for ( len = 2 - len; len > 0; len-- )
4321 av_push((AV *)sv, newSViv(0));
4325 av_push(av, newSViv(0));
4328 /* need to save off the current version string for later */
4330 SV * orig = newSVpvn("v.Inf", sizeof("v.Inf")-1);
4331 (void)hv_stores((HV *)hv, "original", orig);
4332 (void)hv_stores((HV *)hv, "vinf", newSViv(1));
4334 else if ( s > start ) {
4335 SV * orig = newSVpvn(start,s-start);
4336 if ( qv && saw_period == 1 && *start != 'v' ) {
4337 /* need to insert a v to be consistent */
4338 sv_insert(orig, 0, 0, "v", 1);
4340 (void)hv_stores((HV *)hv, "original", orig);
4343 (void)hv_stores((HV *)hv, "original", newSVpvn("0",1));
4344 av_push(av, newSViv(0));
4347 /* And finally, store the AV in the hash */
4348 (void)hv_stores((HV *)hv, "version", newRV_noinc((SV *)av));
4350 /* fix RT#19517 - special case 'undef' as string */
4351 if ( *s == 'u' && strEQ(s,"undef") ) {
4359 =for apidoc new_version
4361 Returns a new version object based on the passed in SV:
4363 SV *sv = new_version(SV *ver);
4365 Does not alter the passed in ver SV. See "upg_version" if you
4366 want to upgrade the SV.
4372 Perl_new_version(pTHX_ SV *ver)
4375 SV * const rv = newSV(0);
4376 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4379 AV * const av = newAV();
4381 /* This will get reblessed later if a derived class*/
4382 SV * const hv = newSVrv(rv, "version");
4383 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4388 /* Begin copying all of the elements */
4389 if ( hv_exists((HV *)ver, "qv", 2) )
4390 (void)hv_stores((HV *)hv, "qv", newSViv(1));
4392 if ( hv_exists((HV *)ver, "alpha", 5) )
4393 (void)hv_stores((HV *)hv, "alpha", newSViv(1));
4395 if ( hv_exists((HV*)ver, "width", 5 ) )
4397 const I32 width = SvIV(*hv_fetchs((HV*)ver, "width", FALSE));
4398 (void)hv_stores((HV *)hv, "width", newSViv(width));
4401 if ( hv_exists((HV*)ver, "original", 8 ) )
4403 SV * pv = *hv_fetchs((HV*)ver, "original", FALSE);
4404 (void)hv_stores((HV *)hv, "original", newSVsv(pv));
4407 sav = (AV *)SvRV(*hv_fetchs((HV*)ver, "version", FALSE));
4408 /* This will get reblessed later if a derived class*/
4409 for ( key = 0; key <= av_len(sav); key++ )
4411 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4412 av_push(av, newSViv(rev));
4415 (void)hv_stores((HV *)hv, "version", newRV_noinc((SV *)av));
4420 const MAGIC* const mg = SvVSTRING_mg(ver);
4421 if ( mg ) { /* already a v-string */
4422 const STRLEN len = mg->mg_len;
4423 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4424 sv_setpvn(rv,version,len);
4425 /* this is for consistency with the pure Perl class */
4426 if ( *version != 'v' )
4427 sv_insert(rv, 0, 0, "v", 1);
4432 sv_setsv(rv,ver); /* make a duplicate */
4437 return upg_version(rv, FALSE);
4441 =for apidoc upg_version
4443 In-place upgrade of the supplied SV to a version object.
4445 SV *sv = upg_version(SV *sv, bool qv);
4447 Returns a pointer to the upgraded SV. Set the boolean qv if you want
4448 to force this SV to be interpreted as an "extended" version.
4454 Perl_upg_version(pTHX_ SV *ver, bool qv)
4456 const char *version, *s;
4461 if ( SvNOK(ver) && !( SvPOK(ver) && sv_len(ver) == 3 ) )
4463 /* may get too much accuracy */
4465 #ifdef USE_LOCALE_NUMERIC
4466 char *loc = setlocale(LC_NUMERIC, "C");
4468 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4469 #ifdef USE_LOCALE_NUMERIC
4470 setlocale(LC_NUMERIC, loc);
4472 while (tbuf[len-1] == '0' && len > 0) len--;
4473 if ( tbuf[len-1] == '.' ) len--; /* eat the trailing decimal */
4474 version = savepvn(tbuf, len);
4477 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
4478 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
4482 else /* must be a string or something like a string */
4485 version = savepv(SvPV(ver,len));
4487 # if PERL_VERSION > 5
4488 /* This will only be executed for 5.6.0 - 5.8.0 inclusive */
4489 if ( len == 3 && !instr(version,".") && !instr(version,"_") ) {
4490 /* may be a v-string */
4491 SV * const nsv = sv_newmortal();
4495 sv_setpvf(nsv,"v%vd",ver);
4496 pos = nver = savepv(SvPV_nolen(nsv));
4498 /* scan the resulting formatted string */
4499 pos++; /* skip the leading 'v' */
4500 while ( *pos == '.' || isDIGIT(*pos) ) {
4506 /* is definitely a v-string */
4507 if ( saw_period == 2 ) {
4516 s = scan_version(version, ver, qv);
4518 if(ckWARN(WARN_MISC))
4519 Perl_warner(aTHX_ packWARN(WARN_MISC),
4520 "Version string '%s' contains invalid data; "
4521 "ignoring: '%s'", version, s);
4529 Validates that the SV contains a valid version object.
4531 bool vverify(SV *vobj);
4533 Note that it only confirms the bare minimum structure (so as not to get
4534 confused by derived classes which may contain additional hash entries):
4538 =item * The SV contains a [reference to a] hash
4540 =item * The hash contains a "version" key
4542 =item * The "version" key has [a reference to] an AV as its value
4550 Perl_vverify(pTHX_ SV *vs)
4556 /* see if the appropriate elements exist */
4557 if ( SvTYPE(vs) == SVt_PVHV
4558 && hv_exists((HV*)vs, "version", 7)
4559 && (sv = SvRV(*hv_fetchs((HV*)vs, "version", FALSE)))
4560 && SvTYPE(sv) == SVt_PVAV )
4569 Accepts a version object and returns the normalized floating
4570 point representation. Call like:
4574 NOTE: you can pass either the object directly or the SV
4575 contained within the RV.
4581 Perl_vnumify(pTHX_ SV *vs)
4586 SV * const sv = newSV(0);
4592 Perl_croak(aTHX_ "Invalid version object");
4594 /* see if various flags exist */
4595 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4597 if ( hv_exists((HV*)vs, "width", 5 ) )
4598 width = SvIV(*hv_fetchs((HV*)vs, "width", FALSE));
4603 /* attempt to retrieve the version array */
4604 if ( !(av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE)) ) ) {
4616 digit = SvIV(*av_fetch(av, 0, 0));
4617 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
4618 for ( i = 1 ; i < len ; i++ )
4620 digit = SvIV(*av_fetch(av, i, 0));
4622 const int denom = (width == 2 ? 10 : 100);
4623 const div_t term = div((int)PERL_ABS(digit),denom);
4624 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
4627 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4633 digit = SvIV(*av_fetch(av, len, 0));
4634 if ( alpha && width == 3 ) /* alpha version */
4636 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4640 sv_catpvs(sv, "000");
4648 Accepts a version object and returns the normalized string
4649 representation. Call like:
4653 NOTE: you can pass either the object directly or the SV
4654 contained within the RV.
4660 Perl_vnormal(pTHX_ SV *vs)
4664 SV * const sv = newSV(0);
4670 Perl_croak(aTHX_ "Invalid version object");
4672 if ( hv_exists((HV*)vs, "alpha", 5 ) )
4674 av = (AV *)SvRV(*hv_fetchs((HV*)vs, "version", FALSE));
4682 digit = SvIV(*av_fetch(av, 0, 0));
4683 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
4684 for ( i = 1 ; i < len ; i++ ) {
4685 digit = SvIV(*av_fetch(av, i, 0));
4686 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4691 /* handle last digit specially */
4692 digit = SvIV(*av_fetch(av, len, 0));
4694 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
4696 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4699 if ( len <= 2 ) { /* short version, must be at least three */
4700 for ( len = 2 - len; len != 0; len-- )
4707 =for apidoc vstringify
4709 In order to maintain maximum compatibility with earlier versions
4710 of Perl, this function will return either the floating point
4711 notation or the multiple dotted notation, depending on whether
4712 the original version contained 1 or more dots, respectively
4718 Perl_vstringify(pTHX_ SV *vs)
4725 Perl_croak(aTHX_ "Invalid version object");
4727 pv = *hv_fetchs((HV*)vs, "original", FALSE);
4731 return &PL_sv_undef;
4737 Version object aware cmp. Both operands must already have been
4738 converted into version objects.
4744 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
4747 bool lalpha = FALSE;
4748 bool ralpha = FALSE;
4757 if ( !vverify(lhv) )
4758 Perl_croak(aTHX_ "Invalid version object");
4760 if ( !vverify(rhv) )
4761 Perl_croak(aTHX_ "Invalid version object");
4763 /* get the left hand term */
4764 lav = (AV *)SvRV(*hv_fetchs((HV*)lhv, "version", FALSE));
4765 if ( hv_exists((HV*)lhv, "alpha", 5 ) )
4768 /* and the right hand term */
4769 rav = (AV *)SvRV(*hv_fetchs((HV*)rhv, "version", FALSE));
4770 if ( hv_exists((HV*)rhv, "alpha", 5 ) )
4778 while ( i <= m && retval == 0 )
4780 left = SvIV(*av_fetch(lav,i,0));
4781 right = SvIV(*av_fetch(rav,i,0));
4789 /* tiebreaker for alpha with identical terms */
4790 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4792 if ( lalpha && !ralpha )
4796 else if ( ralpha && !lalpha)
4802 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
4806 while ( i <= r && retval == 0 )
4808 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
4809 retval = -1; /* not a match after all */
4815 while ( i <= l && retval == 0 )
4817 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
4818 retval = +1; /* not a match after all */
4826 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4827 # define EMULATE_SOCKETPAIR_UDP
4830 #ifdef EMULATE_SOCKETPAIR_UDP
4832 S_socketpair_udp (int fd[2]) {
4834 /* Fake a datagram socketpair using UDP to localhost. */
4835 int sockets[2] = {-1, -1};
4836 struct sockaddr_in addresses[2];
4838 Sock_size_t size = sizeof(struct sockaddr_in);
4839 unsigned short port;
4842 memset(&addresses, 0, sizeof(addresses));
4845 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4846 if (sockets[i] == -1)
4847 goto tidy_up_and_fail;
4849 addresses[i].sin_family = AF_INET;
4850 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4851 addresses[i].sin_port = 0; /* kernel choses port. */
4852 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4853 sizeof(struct sockaddr_in)) == -1)
4854 goto tidy_up_and_fail;
4857 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4858 for each connect the other socket to it. */
4861 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4863 goto tidy_up_and_fail;
4864 if (size != sizeof(struct sockaddr_in))
4865 goto abort_tidy_up_and_fail;
4866 /* !1 is 0, !0 is 1 */
4867 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4868 sizeof(struct sockaddr_in)) == -1)
4869 goto tidy_up_and_fail;
4872 /* Now we have 2 sockets connected to each other. I don't trust some other
4873 process not to have already sent a packet to us (by random) so send
4874 a packet from each to the other. */
4877 /* I'm going to send my own port number. As a short.
4878 (Who knows if someone somewhere has sin_port as a bitfield and needs
4879 this routine. (I'm assuming crays have socketpair)) */
4880 port = addresses[i].sin_port;
4881 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4882 if (got != sizeof(port)) {
4884 goto tidy_up_and_fail;
4885 goto abort_tidy_up_and_fail;
4889 /* Packets sent. I don't trust them to have arrived though.
4890 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4891 connect to localhost will use a second kernel thread. In 2.6 the
4892 first thread running the connect() returns before the second completes,
4893 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4894 returns 0. Poor programs have tripped up. One poor program's authors'
4895 had a 50-1 reverse stock split. Not sure how connected these were.)
4896 So I don't trust someone not to have an unpredictable UDP stack.
4900 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4901 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4905 FD_SET((unsigned int)sockets[0], &rset);
4906 FD_SET((unsigned int)sockets[1], &rset);
4908 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4909 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4910 || !FD_ISSET(sockets[1], &rset)) {
4911 /* I hope this is portable and appropriate. */
4913 goto tidy_up_and_fail;
4914 goto abort_tidy_up_and_fail;
4918 /* And the paranoia department even now doesn't trust it to have arrive
4919 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4921 struct sockaddr_in readfrom;
4922 unsigned short buffer[2];
4927 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4928 sizeof(buffer), MSG_DONTWAIT,
4929 (struct sockaddr *) &readfrom, &size);
4931 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
4933 (struct sockaddr *) &readfrom, &size);
4937 goto tidy_up_and_fail;
4938 if (got != sizeof(port)
4939 || size != sizeof(struct sockaddr_in)
4940 /* Check other socket sent us its port. */
4941 || buffer[0] != (unsigned short) addresses[!i].sin_port
4942 /* Check kernel says we got the datagram from that socket */
4943 || readfrom.sin_family != addresses[!i].sin_family
4944 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
4945 || readfrom.sin_port != addresses[!i].sin_port)
4946 goto abort_tidy_up_and_fail;
4949 /* My caller (my_socketpair) has validated that this is non-NULL */
4952 /* I hereby declare this connection open. May God bless all who cross
4956 abort_tidy_up_and_fail:
4957 errno = ECONNABORTED;
4960 const int save_errno = errno;
4961 if (sockets[0] != -1)
4962 PerlLIO_close(sockets[0]);
4963 if (sockets[1] != -1)
4964 PerlLIO_close(sockets[1]);
4969 #endif /* EMULATE_SOCKETPAIR_UDP */
4971 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
4973 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
4974 /* Stevens says that family must be AF_LOCAL, protocol 0.
4975 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
4980 struct sockaddr_in listen_addr;
4981 struct sockaddr_in connect_addr;
4986 || family != AF_UNIX
4989 errno = EAFNOSUPPORT;
4997 #ifdef EMULATE_SOCKETPAIR_UDP
4998 if (type == SOCK_DGRAM)
4999 return S_socketpair_udp(fd);
5002 listener = PerlSock_socket(AF_INET, type, 0);
5005 memset(&listen_addr, 0, sizeof(listen_addr));
5006 listen_addr.sin_family = AF_INET;
5007 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
5008 listen_addr.sin_port = 0; /* kernel choses port. */
5009 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
5010 sizeof(listen_addr)) == -1)
5011 goto tidy_up_and_fail;
5012 if (PerlSock_listen(listener, 1) == -1)
5013 goto tidy_up_and_fail;
5015 connector = PerlSock_socket(AF_INET, type, 0);
5016 if (connector == -1)
5017 goto tidy_up_and_fail;
5018 /* We want to find out the port number to connect to. */
5019 size = sizeof(connect_addr);
5020 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
5022 goto tidy_up_and_fail;
5023 if (size != sizeof(connect_addr))
5024 goto abort_tidy_up_and_fail;
5025 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
5026 sizeof(connect_addr)) == -1)
5027 goto tidy_up_and_fail;
5029 size = sizeof(listen_addr);
5030 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
5033 goto tidy_up_and_fail;
5034 if (size != sizeof(listen_addr))
5035 goto abort_tidy_up_and_fail;
5036 PerlLIO_close(listener);
5037 /* Now check we are talking to ourself by matching port and host on the
5039 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
5041 goto tidy_up_and_fail;
5042 if (size != sizeof(connect_addr)
5043 || listen_addr.sin_family != connect_addr.sin_family
5044 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
5045 || listen_addr.sin_port != connect_addr.sin_port) {
5046 goto abort_tidy_up_and_fail;
5052 abort_tidy_up_and_fail:
5054 errno = ECONNABORTED; /* This would be the standard thing to do. */
5056 # ifdef ECONNREFUSED
5057 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
5059 errno = ETIMEDOUT; /* Desperation time. */
5064 const int save_errno = errno;
5066 PerlLIO_close(listener);
5067 if (connector != -1)
5068 PerlLIO_close(connector);
5070 PerlLIO_close(acceptor);
5076 /* In any case have a stub so that there's code corresponding
5077 * to the my_socketpair in global.sym. */
5079 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
5080 #ifdef HAS_SOCKETPAIR
5081 return socketpair(family, type, protocol, fd);
5090 =for apidoc sv_nosharing
5092 Dummy routine which "shares" an SV when there is no sharing module present.
5093 Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
5094 Exists to avoid test for a NULL function pointer and because it could
5095 potentially warn under some level of strict-ness.
5101 Perl_sv_nosharing(pTHX_ SV *sv)
5103 PERL_UNUSED_CONTEXT;
5104 PERL_UNUSED_ARG(sv);
5109 =for apidoc sv_destroyable
5111 Dummy routine which reports that object can be destroyed when there is no
5112 sharing module present. It ignores its single SV argument, and returns
5113 'true'. Exists to avoid test for a NULL function pointer and because it
5114 could potentially warn under some level of strict-ness.
5120 Perl_sv_destroyable(pTHX_ SV *sv)
5122 PERL_UNUSED_CONTEXT;
5123 PERL_UNUSED_ARG(sv);
5128 Perl_parse_unicode_opts(pTHX_ const char **popt)
5130 const char *p = *popt;
5135 opt = (U32) atoi(p);
5138 if (*p && *p != '\n' && *p != '\r')
5139 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
5144 case PERL_UNICODE_STDIN:
5145 opt |= PERL_UNICODE_STDIN_FLAG; break;
5146 case PERL_UNICODE_STDOUT:
5147 opt |= PERL_UNICODE_STDOUT_FLAG; break;
5148 case PERL_UNICODE_STDERR:
5149 opt |= PERL_UNICODE_STDERR_FLAG; break;
5150 case PERL_UNICODE_STD:
5151 opt |= PERL_UNICODE_STD_FLAG; break;
5152 case PERL_UNICODE_IN:
5153 opt |= PERL_UNICODE_IN_FLAG; break;
5154 case PERL_UNICODE_OUT:
5155 opt |= PERL_UNICODE_OUT_FLAG; break;
5156 case PERL_UNICODE_INOUT:
5157 opt |= PERL_UNICODE_INOUT_FLAG; break;
5158 case PERL_UNICODE_LOCALE:
5159 opt |= PERL_UNICODE_LOCALE_FLAG; break;
5160 case PERL_UNICODE_ARGV:
5161 opt |= PERL_UNICODE_ARGV_FLAG; break;
5162 case PERL_UNICODE_UTF8CACHEASSERT:
5163 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
5165 if (*p != '\n' && *p != '\r')
5167 "Unknown Unicode option letter '%c'", *p);
5173 opt = PERL_UNICODE_DEFAULT_FLAGS;
5175 if (opt & ~PERL_UNICODE_ALL_FLAGS)
5176 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
5177 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
5189 * This is really just a quick hack which grabs various garbage
5190 * values. It really should be a real hash algorithm which
5191 * spreads the effect of every input bit onto every output bit,
5192 * if someone who knows about such things would bother to write it.
5193 * Might be a good idea to add that function to CORE as well.
5194 * No numbers below come from careful analysis or anything here,
5195 * except they are primes and SEED_C1 > 1E6 to get a full-width
5196 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
5197 * probably be bigger too.
5200 # define SEED_C1 1000003
5201 #define SEED_C4 73819
5203 # define SEED_C1 25747
5204 #define SEED_C4 20639
5208 #define SEED_C5 26107
5210 #ifndef PERL_NO_DEV_RANDOM
5215 # include <starlet.h>
5216 /* when[] = (low 32 bits, high 32 bits) of time since epoch
5217 * in 100-ns units, typically incremented ever 10 ms. */
5218 unsigned int when[2];
5220 # ifdef HAS_GETTIMEOFDAY
5221 struct timeval when;
5227 /* This test is an escape hatch, this symbol isn't set by Configure. */
5228 #ifndef PERL_NO_DEV_RANDOM
5229 #ifndef PERL_RANDOM_DEVICE
5230 /* /dev/random isn't used by default because reads from it will block
5231 * if there isn't enough entropy available. You can compile with
5232 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
5233 * is enough real entropy to fill the seed. */
5234 # define PERL_RANDOM_DEVICE "/dev/urandom"
5236 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
5238 if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u)
5247 _ckvmssts(sys$gettim(when));
5248 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
5250 # ifdef HAS_GETTIMEOFDAY
5251 PerlProc_gettimeofday(&when,NULL);
5252 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
5255 u = (U32)SEED_C1 * when;
5258 u += SEED_C3 * (U32)PerlProc_getpid();
5259 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
5260 #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
5261 u += SEED_C5 * (U32)PTR2UV(&when);
5267 Perl_get_hash_seed(pTHX)
5270 const char *s = PerlEnv_getenv("PERL_HASH_SEED");
5276 if (s && isDIGIT(*s))
5277 myseed = (UV)Atoul(s);
5279 #ifdef USE_HASH_SEED_EXPLICIT
5283 /* Compute a random seed */
5284 (void)seedDrand01((Rand_seed_t)seed());
5285 myseed = (UV)(Drand01() * (NV)UV_MAX);
5286 #if RANDBITS < (UVSIZE * 8)
5287 /* Since there are not enough randbits to to reach all
5288 * the bits of a UV, the low bits might need extra
5289 * help. Sum in another random number that will
5290 * fill in the low bits. */
5292 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
5293 #endif /* RANDBITS < (UVSIZE * 8) */
5294 if (myseed == 0) { /* Superparanoia. */
5295 myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
5297 Perl_croak(aTHX_ "Your random numbers are not that random");
5300 PL_rehash_seed_set = TRUE;
5307 Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
5309 const char * const stashpv = CopSTASHPV(c);
5310 const char * const name = HvNAME_get(hv);
5311 PERL_UNUSED_CONTEXT;
5313 if (stashpv == name)
5315 if (stashpv && name)
5316 if (strEQ(stashpv, name))
5323 #ifdef PERL_GLOBAL_STRUCT
5325 #define PERL_GLOBAL_STRUCT_INIT
5326 #include "opcode.h" /* the ppaddr and check */
5329 Perl_init_global_struct(pTHX)
5331 struct perl_vars *plvarsp = NULL;
5332 # ifdef PERL_GLOBAL_STRUCT
5333 const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t);
5334 const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t);
5335 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5336 /* PerlMem_malloc() because can't use even safesysmalloc() this early. */
5337 plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars));
5341 plvarsp = PL_VarsPtr;
5342 # endif /* PERL_GLOBAL_STRUCT_PRIVATE */
5348 # define PERLVAR(var,type) /**/
5349 # define PERLVARA(var,n,type) /**/
5350 # define PERLVARI(var,type,init) plvarsp->var = init;
5351 # define PERLVARIC(var,type,init) plvarsp->var = init;
5352 # define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char);
5353 # include "perlvars.h"
5359 # ifdef PERL_GLOBAL_STRUCT
5362 PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t));
5363 if (!plvarsp->Gppaddr)
5367 PerlMem_malloc(ncheck * sizeof(Perl_check_t));
5368 if (!plvarsp->Gcheck)
5370 Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t);
5371 Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t);
5373 # ifdef PERL_SET_VARS
5374 PERL_SET_VARS(plvarsp);
5376 # undef PERL_GLOBAL_STRUCT_INIT
5381 #endif /* PERL_GLOBAL_STRUCT */
5383 #ifdef PERL_GLOBAL_STRUCT
5386 Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
5388 # ifdef PERL_GLOBAL_STRUCT
5389 # ifdef PERL_UNSET_VARS
5390 PERL_UNSET_VARS(plvarsp);
5392 free(plvarsp->Gppaddr);
5393 free(plvarsp->Gcheck);
5394 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5400 #endif /* PERL_GLOBAL_STRUCT */
5405 * PERL_MEM_LOG: the Perl_mem_log_..() will be compiled.
5407 * PERL_MEM_LOG_ENV: if defined, during run time the environment
5408 * variable PERL_MEM_LOG will be consulted, and if the integer value
5409 * of that is true, the logging will happen. (The default is to
5410 * always log if the PERL_MEM_LOG define was in effect.)
5414 * PERL_MEM_LOG_SPRINTF_BUF_SIZE: size of a (stack-allocated) buffer
5415 * the Perl_mem_log_...() will use (either via sprintf or snprintf).
5417 #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128
5420 * PERL_MEM_LOG_FD: the file descriptor the Perl_mem_log_...() will
5421 * log to. You can also define in compile time PERL_MEM_LOG_ENV_FD,
5422 * in which case the environment variable PERL_MEM_LOG_FD will be
5423 * consulted for the file descriptor number to use.
5425 #ifndef PERL_MEM_LOG_FD
5426 # define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */
5430 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)
5432 #ifdef PERL_MEM_LOG_STDERR
5433 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5436 # ifdef PERL_MEM_LOG_ENV
5437 s = getenv("PERL_MEM_LOG");
5438 if (s ? atoi(s) : 0)
5441 /* We can't use SVs or PerlIO for obvious reasons,
5442 * so we'll use stdio and low-level IO instead. */
5443 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5444 # ifdef PERL_MEM_LOG_TIMESTAMP
5446 # ifdef HAS_GETTIMEOFDAY
5447 gettimeofday(&tv, 0);
5449 /* If there are other OS specific ways of hires time than
5450 * gettimeofday() (see ext/Time/HiRes), the easiest way is
5451 * probably that they would be used to fill in the struct
5458 # ifdef PERL_MEM_LOG_TIMESTAMP
5461 "alloc: %s:%d:%s: %"IVdf" %"UVuf
5462 " %s = %"IVdf": %"UVxf"\n",
5463 # ifdef PERL_MEM_LOG_TIMESTAMP
5464 (int)tv.tv_sec, (int)tv.tv_usec,
5466 filename, linenumber, funcname, n, typesize,
5467 typename, n * typesize, PTR2UV(newalloc));
5468 # ifdef PERL_MEM_LOG_ENV_FD
5469 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5470 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5472 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5481 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)
5483 #ifdef PERL_MEM_LOG_STDERR
5484 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5487 # ifdef PERL_MEM_LOG_ENV
5488 s = PerlEnv_getenv("PERL_MEM_LOG");
5489 if (s ? atoi(s) : 0)
5492 /* We can't use SVs or PerlIO for obvious reasons,
5493 * so we'll use stdio and low-level IO instead. */
5494 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5495 # ifdef PERL_MEM_LOG_TIMESTAMP
5497 gettimeofday(&tv, 0);
5503 # ifdef PERL_MEM_LOG_TIMESTAMP
5506 "realloc: %s:%d:%s: %"IVdf" %"UVuf
5507 " %s = %"IVdf": %"UVxf" -> %"UVxf"\n",
5508 # ifdef PERL_MEM_LOG_TIMESTAMP
5509 (int)tv.tv_sec, (int)tv.tv_usec,
5511 filename, linenumber, funcname, n, typesize,
5512 typename, n * typesize, PTR2UV(oldalloc),
5514 # ifdef PERL_MEM_LOG_ENV_FD
5515 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5516 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5518 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5527 Perl_mem_log_free(Malloc_t oldalloc, const char *filename, const int linenumber, const char *funcname)
5529 #ifdef PERL_MEM_LOG_STDERR
5530 # if defined(PERL_MEM_LOG_ENV) || defined(PERL_MEM_LOG_ENV_FD)
5533 # ifdef PERL_MEM_LOG_ENV
5534 s = PerlEnv_getenv("PERL_MEM_LOG");
5535 if (s ? atoi(s) : 0)
5538 /* We can't use SVs or PerlIO for obvious reasons,
5539 * so we'll use stdio and low-level IO instead. */
5540 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5541 # ifdef PERL_MEM_LOG_TIMESTAMP
5543 gettimeofday(&tv, 0);
5549 # ifdef PERL_MEM_LOG_TIMESTAMP
5552 "free: %s:%d:%s: %"UVxf"\n",
5553 # ifdef PERL_MEM_LOG_TIMESTAMP
5554 (int)tv.tv_sec, (int)tv.tv_usec,
5556 filename, linenumber, funcname,
5558 # ifdef PERL_MEM_LOG_ENV_FD
5559 s = PerlEnv_getenv("PERL_MEM_LOG_FD");
5560 PerlLIO_write(s ? atoi(s) : PERL_MEM_LOG_FD, buf, len);
5562 PerlLIO_write(PERL_MEM_LOG_FD, buf, len);
5570 #endif /* PERL_MEM_LOG */
5573 =for apidoc my_sprintf
5575 The C library C<sprintf>, wrapped if necessary, to ensure that it will return
5576 the length of the string written to the buffer. Only rare pre-ANSI systems
5577 need the wrapper function - usually this is a direct call to C<sprintf>.
5581 #ifndef SPRINTF_RETURNS_STRLEN
5583 Perl_my_sprintf(char *buffer, const char* pat, ...)
5586 va_start(args, pat);
5587 vsprintf(buffer, pat, args);
5589 return strlen(buffer);
5594 =for apidoc my_snprintf
5596 The C library C<snprintf> functionality, if available and
5597 standards-compliant (uses C<vsnprintf>, actually). However, if the
5598 C<vsnprintf> is not available, will unfortunately use the unsafe
5599 C<vsprintf> which can overrun the buffer (there is an overrun check,
5600 but that may be too late). Consider using C<sv_vcatpvf> instead, or
5601 getting C<vsnprintf>.
5606 Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
5611 va_start(ap, format);
5612 #ifdef HAS_VSNPRINTF
5613 retval = vsnprintf(buffer, len, format, ap);
5615 retval = vsprintf(buffer, format, ap);
5618 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5619 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5620 Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
5625 =for apidoc my_vsnprintf
5627 The C library C<vsnprintf> if available and standards-compliant.
5628 However, if if the C<vsnprintf> is not available, will unfortunately
5629 use the unsafe C<vsprintf> which can overrun the buffer (there is an
5630 overrun check, but that may be too late). Consider using
5631 C<sv_vcatpvf> instead, or getting C<vsnprintf>.
5636 Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap)
5642 Perl_va_copy(ap, apc);
5643 # ifdef HAS_VSNPRINTF
5644 retval = vsnprintf(buffer, len, format, apc);
5646 retval = vsprintf(buffer, format, apc);
5649 # ifdef HAS_VSNPRINTF
5650 retval = vsnprintf(buffer, len, format, ap);
5652 retval = vsprintf(buffer, format, ap);
5654 #endif /* #ifdef NEED_VA_COPY */
5655 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5656 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5657 Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
5662 Perl_my_clearenv(pTHX)
5665 #if ! defined(PERL_MICRO)
5666 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
5668 # else /* ! (PERL_IMPLICIT_SYS || WIN32) */
5669 # if defined(USE_ENVIRON_ARRAY)
5670 # if defined(USE_ITHREADS)
5671 /* only the parent thread can clobber the process environment */
5672 if (PL_curinterp == aTHX)
5673 # endif /* USE_ITHREADS */
5675 # if ! defined(PERL_USE_SAFE_PUTENV)
5676 if ( !PL_use_safe_putenv) {
5678 if (environ == PL_origenviron)
5679 environ = (char**)safesysmalloc(sizeof(char*));
5681 for (i = 0; environ[i]; i++)
5682 (void)safesysfree(environ[i]);
5685 # else /* PERL_USE_SAFE_PUTENV */
5686 # if defined(HAS_CLEARENV)
5688 # elif defined(HAS_UNSETENV)
5689 int bsiz = 80; /* Most envvar names will be shorter than this. */
5690 int bufsiz = bsiz * sizeof(char); /* sizeof(char) paranoid? */
5691 char *buf = (char*)safesysmalloc(bufsiz);
5692 while (*environ != NULL) {
5693 char *e = strchr(*environ, '=');
5694 int l = e ? e - *environ : (int)strlen(*environ);
5696 (void)safesysfree(buf);
5697 bsiz = l + 1; /* + 1 for the \0. */
5698 buf = (char*)safesysmalloc(bufsiz);
5700 memcpy(buf, *environ, l);
5702 (void)unsetenv(buf);
5704 (void)safesysfree(buf);
5705 # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */
5706 /* Just null environ and accept the leakage. */
5708 # endif /* HAS_CLEARENV || HAS_UNSETENV */
5709 # endif /* ! PERL_USE_SAFE_PUTENV */
5711 # endif /* USE_ENVIRON_ARRAY */
5712 # endif /* PERL_IMPLICIT_SYS || WIN32 */
5713 #endif /* PERL_MICRO */
5716 #ifdef PERL_IMPLICIT_CONTEXT
5718 /* Implements the MY_CXT_INIT macro. The first time a module is loaded,
5719 the global PL_my_cxt_index is incremented, and that value is assigned to
5720 that module's static my_cxt_index (who's address is passed as an arg).
5721 Then, for each interpreter this function is called for, it makes sure a
5722 void* slot is available to hang the static data off, by allocating or
5723 extending the interpreter's PL_my_cxt_list array */
5725 #ifndef PERL_GLOBAL_STRUCT_PRIVATE
5727 Perl_my_cxt_init(pTHX_ int *index, size_t size)
5732 /* this module hasn't been allocated an index yet */
5733 MUTEX_LOCK(&PL_my_ctx_mutex);
5734 *index = PL_my_cxt_index++;
5735 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5738 /* make sure the array is big enough */
5739 if (PL_my_cxt_size <= *index) {
5740 if (PL_my_cxt_size) {
5741 while (PL_my_cxt_size <= *index)
5742 PL_my_cxt_size *= 2;
5743 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5746 PL_my_cxt_size = 16;
5747 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5750 /* newSV() allocates one more than needed */
5751 p = (void*)SvPVX(newSV(size-1));
5752 PL_my_cxt_list[*index] = p;
5753 Zero(p, size, char);
5757 #else /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5760 Perl_my_cxt_index(pTHX_ const char *my_cxt_key)
5765 for (index = 0; index < PL_my_cxt_index; index++) {
5766 const char *key = PL_my_cxt_keys[index];
5767 /* try direct pointer compare first - there are chances to success,
5768 * and it's much faster.
5770 if ((key == my_cxt_key) || strEQ(key, my_cxt_key))
5777 Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size)
5783 index = Perl_my_cxt_index(aTHX_ my_cxt_key);
5785 /* this module hasn't been allocated an index yet */
5786 MUTEX_LOCK(&PL_my_ctx_mutex);
5787 index = PL_my_cxt_index++;
5788 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5791 /* make sure the array is big enough */
5792 if (PL_my_cxt_size <= index) {
5793 int old_size = PL_my_cxt_size;
5795 if (PL_my_cxt_size) {
5796 while (PL_my_cxt_size <= index)
5797 PL_my_cxt_size *= 2;
5798 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5799 Renew(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5802 PL_my_cxt_size = 16;
5803 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5804 Newx(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5806 for (i = old_size; i < PL_my_cxt_size; i++) {
5807 PL_my_cxt_keys[i] = 0;
5808 PL_my_cxt_list[i] = 0;
5811 PL_my_cxt_keys[index] = my_cxt_key;
5812 /* newSV() allocates one more than needed */
5813 p = (void*)SvPVX(newSV(size-1));
5814 PL_my_cxt_list[index] = p;
5815 Zero(p, size, char);
5818 #endif /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5819 #endif /* PERL_IMPLICIT_CONTEXT */
5823 Perl_my_strlcat(char *dst, const char *src, Size_t size)
5825 Size_t used, length, copy;
5828 length = strlen(src);
5829 if (size > 0 && used < size - 1) {
5830 copy = (length >= size - used) ? size - used - 1 : length;
5831 memcpy(dst + used, src, copy);
5832 dst[used + copy] = '\0';
5834 return used + length;
5840 Perl_my_strlcpy(char *dst, const char *src, Size_t size)
5842 Size_t length, copy;
5844 length = strlen(src);
5846 copy = (length >= size) ? size - 1 : length;
5847 memcpy(dst, src, copy);
5854 #if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_MSC_VER < 1400) && (WINVER < 0x0500)
5855 /* VC7 or 7.1, building with pre-VC7 runtime libraries. */
5856 long _ftol( double ); /* Defined by VC6 C libs. */
5857 long _ftol2( double dblSource ) { return _ftol( dblSource ); }
5861 Perl_get_db_sub(pTHX_ SV **svp, CV *cv)
5864 SV * const dbsv = GvSVn(PL_DBsub);
5865 /* We do not care about using sv to call CV;
5866 * it's for informational purposes only.
5870 if (!PERLDB_SUB_NN) {
5871 GV * const gv = CvGV(cv);
5873 if ( svp && ((CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
5874 || strEQ(GvNAME(gv), "END")
5875 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
5876 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv) )))) {
5877 /* Use GV from the stack as a fallback. */
5878 /* GV is potentially non-unique, or contain different CV. */
5879 SV * const tmp = newRV((SV*)cv);
5880 sv_setsv(dbsv, tmp);
5884 gv_efullname3(dbsv, gv, NULL);
5888 const int type = SvTYPE(dbsv);
5889 if (type < SVt_PVIV && type != SVt_IV)
5890 sv_upgrade(dbsv, SVt_PVIV);
5891 (void)SvIOK_on(dbsv);
5892 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
5897 Perl_my_dirfd(pTHX_ DIR * dir) {
5899 /* Most dirfd implementations have problems when passed NULL. */
5904 #elif defined(HAS_DIR_DD_FD)
5907 Perl_die(aTHX_ PL_no_func, "dirfd");
5914 Perl_get_re_arg(pTHX_ SV *sv) {
5921 (tmpsv = (SV*)SvRV(sv)) && /* assign deliberate */
5922 SvTYPE(tmpsv) == SVt_REGEXP)
5924 return (REGEXP*) tmpsv;
5933 * c-indentation-style: bsd
5935 * indent-tabs-mode: t
5938 * ex: set ts=8 sts=4 sw=4 noet: