3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008 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 to Pippin
15 * [p.598 of _The Lord of the Rings_, III/xi: "The PalantÃr"]
18 /* This file contains assorted utility routines.
19 * Which is a polite way of saying any stuff that people couldn't think of
20 * a better place for. Amongst other things, it includes the warning and
21 * dieing stuff, plus wrappers for malloc code.
25 #define PERL_IN_UTIL_C
31 # define SIG_ERR ((Sighandler_t) -1)
36 /* Missing protos on LynxOS */
41 # include <sys/wait.h>
46 # include <sys/select.h>
52 #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
53 # define FD_CLOEXEC 1 /* NeXT needs this */
56 /* NOTE: Do not call the next three routines directly. Use the macros
57 * in handy.h, so that we can easily redefine everything to do tracking of
58 * allocated hunks back to the original New to track down any memory leaks.
59 * XXX This advice seems to be widely ignored :-( --AD August 1996.
66 /* Can't use PerlIO to write as it allocates memory */
67 PerlLIO_write(PerlIO_fileno(Perl_error_log),
68 PL_no_mem, strlen(PL_no_mem));
70 NORETURN_FUNCTION_END;
73 /* paranoid version of system's malloc() */
76 Perl_safesysmalloc(MEM_SIZE size)
82 PerlIO_printf(Perl_error_log,
83 "Allocation too large: %lx\n", size) FLUSH;
86 #endif /* HAS_64K_LIMIT */
87 #ifdef PERL_TRACK_MEMPOOL
92 Perl_croak_nocontext("panic: malloc");
94 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
95 PERL_ALLOC_CHECK(ptr);
96 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
98 #ifdef PERL_TRACK_MEMPOOL
99 struct perl_memory_debug_header *const header
100 = (struct perl_memory_debug_header *)ptr;
104 PoisonNew(((char *)ptr), size, char);
107 #ifdef PERL_TRACK_MEMPOOL
108 header->interpreter = aTHX;
109 /* Link us into the list. */
110 header->prev = &PL_memory_debug_header;
111 header->next = PL_memory_debug_header.next;
112 PL_memory_debug_header.next = header;
113 header->next->prev = header;
117 ptr = (Malloc_t)((char*)ptr+sTHX);
124 return write_no_mem();
129 /* paranoid version of system's realloc() */
132 Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
136 #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
137 Malloc_t PerlMem_realloc();
138 #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
142 PerlIO_printf(Perl_error_log,
143 "Reallocation too large: %lx\n", size) FLUSH;
146 #endif /* HAS_64K_LIMIT */
153 return safesysmalloc(size);
154 #ifdef PERL_TRACK_MEMPOOL
155 where = (Malloc_t)((char*)where-sTHX);
158 struct perl_memory_debug_header *const header
159 = (struct perl_memory_debug_header *)where;
161 if (header->interpreter != aTHX) {
162 Perl_croak_nocontext("panic: realloc from wrong pool");
164 assert(header->next->prev == header);
165 assert(header->prev->next == header);
167 if (header->size > size) {
168 const MEM_SIZE freed_up = header->size - size;
169 char *start_of_freed = ((char *)where) + size;
170 PoisonFree(start_of_freed, freed_up, char);
178 Perl_croak_nocontext("panic: realloc");
180 ptr = (Malloc_t)PerlMem_realloc(where,size);
181 PERL_ALLOC_CHECK(ptr);
183 /* MUST do this fixup first, before doing ANYTHING else, as anything else
184 might allocate memory/free/move memory, and until we do the fixup, it
185 may well be chasing (and writing to) free memory. */
186 #ifdef PERL_TRACK_MEMPOOL
188 struct perl_memory_debug_header *const header
189 = (struct perl_memory_debug_header *)ptr;
192 if (header->size < size) {
193 const MEM_SIZE fresh = size - header->size;
194 char *start_of_fresh = ((char *)ptr) + size;
195 PoisonNew(start_of_fresh, fresh, char);
199 header->next->prev = header;
200 header->prev->next = header;
202 ptr = (Malloc_t)((char*)ptr+sTHX);
206 /* In particular, must do that fixup above before logging anything via
207 *printf(), as it can reallocate memory, which can cause SEGVs. */
209 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
210 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
219 return write_no_mem();
224 /* safe version of system's free() */
227 Perl_safesysfree(Malloc_t where)
229 #if defined(PERL_IMPLICIT_SYS) || defined(PERL_TRACK_MEMPOOL)
234 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
236 #ifdef PERL_TRACK_MEMPOOL
237 where = (Malloc_t)((char*)where-sTHX);
239 struct perl_memory_debug_header *const header
240 = (struct perl_memory_debug_header *)where;
242 if (header->interpreter != aTHX) {
243 Perl_croak_nocontext("panic: free from wrong pool");
246 Perl_croak_nocontext("panic: duplicate free");
248 if (!(header->next) || header->next->prev != header
249 || header->prev->next != header) {
250 Perl_croak_nocontext("panic: bad free");
252 /* Unlink us from the chain. */
253 header->next->prev = header->prev;
254 header->prev->next = header->next;
256 PoisonNew(where, header->size, char);
258 /* Trigger the duplicate free warning. */
266 /* safe version of system's calloc() */
269 Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
273 MEM_SIZE total_size = 0;
275 /* Even though calloc() for zero bytes is strange, be robust. */
276 if (size && (count <= MEM_SIZE_MAX / size))
277 total_size = size * count;
279 Perl_croak_nocontext("%s", PL_memory_wrap);
280 #ifdef PERL_TRACK_MEMPOOL
281 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
284 Perl_croak_nocontext("%s", PL_memory_wrap);
287 if (total_size > 0xffff) {
288 PerlIO_printf(Perl_error_log,
289 "Allocation too large: %lx\n", total_size) FLUSH;
292 #endif /* HAS_64K_LIMIT */
294 if ((long)size < 0 || (long)count < 0)
295 Perl_croak_nocontext("panic: calloc");
297 #ifdef PERL_TRACK_MEMPOOL
298 /* Have to use malloc() because we've added some space for our tracking
300 /* malloc(0) is non-portable. */
301 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
303 /* Use calloc() because it might save a memset() if the memory is fresh
304 and clean from the OS. */
306 ptr = (Malloc_t)PerlMem_calloc(count, size);
307 else /* calloc(0) is non-portable. */
308 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
310 PERL_ALLOC_CHECK(ptr);
311 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));
313 #ifdef PERL_TRACK_MEMPOOL
315 struct perl_memory_debug_header *const header
316 = (struct perl_memory_debug_header *)ptr;
318 memset((void*)ptr, 0, total_size);
319 header->interpreter = aTHX;
320 /* Link us into the list. */
321 header->prev = &PL_memory_debug_header;
322 header->next = PL_memory_debug_header.next;
323 PL_memory_debug_header.next = header;
324 header->next->prev = header;
326 header->size = total_size;
328 ptr = (Malloc_t)((char*)ptr+sTHX);
335 return write_no_mem();
338 /* These must be defined when not using Perl's malloc for binary
343 Malloc_t Perl_malloc (MEM_SIZE nbytes)
346 return (Malloc_t)PerlMem_malloc(nbytes);
349 Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
352 return (Malloc_t)PerlMem_calloc(elements, size);
355 Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
358 return (Malloc_t)PerlMem_realloc(where, nbytes);
361 Free_t Perl_mfree (Malloc_t where)
369 /* copy a string up to some (non-backslashed) delimiter, if any */
372 Perl_delimcpy(register char *to, register const char *toend, register const char *from, register const char *fromend, register int delim, I32 *retlen)
376 PERL_ARGS_ASSERT_DELIMCPY;
378 for (tolen = 0; from < fromend; from++, tolen++) {
380 if (from[1] != delim) {
387 else if (*from == delim)
398 /* return ptr to little string in big string, NULL if not found */
399 /* This routine was donated by Corey Satten. */
402 Perl_instr(register const char *big, register const char *little)
406 PERL_ARGS_ASSERT_INSTR;
414 register const char *s, *x;
417 for (x=big,s=little; *s; /**/ ) {
428 return (char*)(big-1);
433 /* same as instr but allow embedded nulls */
436 Perl_ninstr(const char *big, const char *bigend, const char *little, const char *lend)
438 PERL_ARGS_ASSERT_NINSTR;
442 const char first = *little;
444 bigend -= lend - little++;
446 while (big <= bigend) {
447 if (*big++ == first) {
448 for (x=big,s=little; s < lend; x++,s++) {
452 return (char*)(big-1);
459 /* reverse of the above--find last substring */
462 Perl_rninstr(register const char *big, const char *bigend, const char *little, const char *lend)
464 register const char *bigbeg;
465 register const I32 first = *little;
466 register const char * const littleend = lend;
468 PERL_ARGS_ASSERT_RNINSTR;
470 if (little >= littleend)
471 return (char*)bigend;
473 big = bigend - (littleend - little++);
474 while (big >= bigbeg) {
475 register const char *s, *x;
478 for (x=big+2,s=little; s < littleend; /**/ ) {
487 return (char*)(big+1);
492 /* As a space optimization, we do not compile tables for strings of length
493 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
494 special-cased in fbm_instr().
496 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
499 =head1 Miscellaneous Functions
501 =for apidoc fbm_compile
503 Analyses the string in order to make fast searches on it using fbm_instr()
504 -- the Boyer-Moore algorithm.
510 Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
513 register const U8 *s;
519 PERL_ARGS_ASSERT_FBM_COMPILE;
521 if (flags & FBMcf_TAIL) {
522 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
523 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
524 if (mg && mg->mg_len >= 0)
527 s = (U8*)SvPV_force_mutable(sv, len);
528 if (len == 0) /* TAIL might be on a zero-length string. */
530 SvUPGRADE(sv, SVt_PVGV);
535 const unsigned char *sb;
536 const U8 mlen = (len>255) ? 255 : (U8)len;
539 Sv_Grow(sv, len + 256 + PERL_FBM_TABLE_OFFSET);
541 = (unsigned char*)(SvPVX_mutable(sv) + len + PERL_FBM_TABLE_OFFSET);
542 s = table - 1 - PERL_FBM_TABLE_OFFSET; /* last char */
543 memset((void*)table, mlen, 256);
545 sb = s - mlen + 1; /* first char (maybe) */
547 if (table[*s] == mlen)
552 Sv_Grow(sv, len + PERL_FBM_TABLE_OFFSET);
554 sv_magic(sv, NULL, PERL_MAGIC_bm, NULL, 0); /* deep magic */
556 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
557 for (i = 0; i < len; i++) {
558 if (PL_freq[s[i]] < frequency) {
560 frequency = PL_freq[s[i]];
563 BmFLAGS(sv) = (U8)flags;
564 BmRARE(sv) = s[rarest];
565 BmPREVIOUS(sv) = rarest;
566 BmUSEFUL(sv) = 100; /* Initial value */
567 if (flags & FBMcf_TAIL)
569 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %lu\n",
570 BmRARE(sv),(unsigned long)BmPREVIOUS(sv)));
573 /* If SvTAIL(littlestr), it has a fake '\n' at end. */
574 /* If SvTAIL is actually due to \Z or \z, this gives false positives
578 =for apidoc fbm_instr
580 Returns the location of the SV in the string delimited by C<str> and
581 C<strend>. It returns C<NULL> if the string can't be found. The C<sv>
582 does not have to be fbm_compiled, but the search will not be as fast
589 Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
591 register unsigned char *s;
593 register const unsigned char *little
594 = (const unsigned char *)SvPV_const(littlestr,l);
595 register STRLEN littlelen = l;
596 register const I32 multiline = flags & FBMrf_MULTILINE;
598 PERL_ARGS_ASSERT_FBM_INSTR;
600 if ((STRLEN)(bigend - big) < littlelen) {
601 if ( SvTAIL(littlestr)
602 && ((STRLEN)(bigend - big) == littlelen - 1)
604 || (*big == *little &&
605 memEQ((char *)big, (char *)little, littlelen - 1))))
610 if (littlelen <= 2) { /* Special-cased */
612 if (littlelen == 1) {
613 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
614 /* Know that bigend != big. */
615 if (bigend[-1] == '\n')
616 return (char *)(bigend - 1);
617 return (char *) bigend;
625 if (SvTAIL(littlestr))
626 return (char *) bigend;
630 return (char*)big; /* Cannot be SvTAIL! */
633 if (SvTAIL(littlestr) && !multiline) {
634 if (bigend[-1] == '\n' && bigend[-2] == *little)
635 return (char*)bigend - 2;
636 if (bigend[-1] == *little)
637 return (char*)bigend - 1;
641 /* This should be better than FBM if c1 == c2, and almost
642 as good otherwise: maybe better since we do less indirection.
643 And we save a lot of memory by caching no table. */
644 const unsigned char c1 = little[0];
645 const unsigned char c2 = little[1];
650 while (s <= bigend) {
660 goto check_1char_anchor;
671 goto check_1char_anchor;
674 while (s <= bigend) {
679 goto check_1char_anchor;
688 check_1char_anchor: /* One char and anchor! */
689 if (SvTAIL(littlestr) && (*bigend == *little))
690 return (char *)bigend; /* bigend is already decremented. */
693 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
694 s = bigend - littlelen;
695 if (s >= big && bigend[-1] == '\n' && *s == *little
696 /* Automatically of length > 2 */
697 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
699 return (char*)s; /* how sweet it is */
702 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
704 return (char*)s + 1; /* how sweet it is */
708 if (!SvVALID(littlestr)) {
709 char * const b = ninstr((char*)big,(char*)bigend,
710 (char*)little, (char*)little + littlelen);
712 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
713 /* Chop \n from littlestr: */
714 s = bigend - littlelen + 1;
716 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
726 if (littlelen > (STRLEN)(bigend - big))
730 register const unsigned char * const table
731 = little + littlelen + PERL_FBM_TABLE_OFFSET;
732 register const unsigned char *oldlittle;
734 --littlelen; /* Last char found by table lookup */
737 little += littlelen; /* last char */
743 if ((tmp = table[*s])) {
744 if ((s += tmp) < bigend)
748 else { /* less expensive than calling strncmp() */
749 register unsigned char * const olds = s;
754 if (*--s == *--little)
756 s = olds + 1; /* here we pay the price for failure */
758 if (s < bigend) /* fake up continue to outer loop */
767 && (BmFLAGS(littlestr) & FBMcf_TAIL)
768 && memEQ((char *)(bigend - littlelen),
769 (char *)(oldlittle - littlelen), littlelen) )
770 return (char*)bigend - littlelen;
775 /* start_shift, end_shift are positive quantities which give offsets
776 of ends of some substring of bigstr.
777 If "last" we want the last occurrence.
778 old_posp is the way of communication between consequent calls if
779 the next call needs to find the .
780 The initial *old_posp should be -1.
782 Note that we take into account SvTAIL, so one can get extra
783 optimizations if _ALL flag is set.
786 /* If SvTAIL is actually due to \Z or \z, this gives false positives
787 if PL_multiline. In fact if !PL_multiline the authoritative answer
788 is not supported yet. */
791 Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
794 register const unsigned char *big;
796 register I32 previous;
798 register const unsigned char *little;
799 register I32 stop_pos;
800 register const unsigned char *littleend;
803 PERL_ARGS_ASSERT_SCREAMINSTR;
805 assert(SvTYPE(littlestr) == SVt_PVGV);
806 assert(SvVALID(littlestr));
809 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
810 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
812 if ( BmRARE(littlestr) == '\n'
813 && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
814 little = (const unsigned char *)(SvPVX_const(littlestr));
815 littleend = little + SvCUR(littlestr);
822 little = (const unsigned char *)(SvPVX_const(littlestr));
823 littleend = little + SvCUR(littlestr);
825 /* The value of pos we can start at: */
826 previous = BmPREVIOUS(littlestr);
827 big = (const unsigned char *)(SvPVX_const(bigstr));
828 /* The value of pos we can stop at: */
829 stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
830 if (previous + start_shift > stop_pos) {
832 stop_pos does not include SvTAIL in the count, so this check is incorrect
833 (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
836 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
841 while (pos < previous + start_shift) {
842 if (!(pos += PL_screamnext[pos]))
847 register const unsigned char *s, *x;
848 if (pos >= stop_pos) break;
849 if (big[pos] != first)
851 for (x=big+pos+1,s=little; s < littleend; /**/ ) {
857 if (s == littleend) {
859 if (!last) return (char *)(big+pos);
862 } while ( pos += PL_screamnext[pos] );
864 return (char *)(big+(*old_posp));
866 if (!SvTAIL(littlestr) || (end_shift > 0))
868 /* Ignore the trailing "\n". This code is not microoptimized */
869 big = (const unsigned char *)(SvPVX_const(bigstr) + SvCUR(bigstr));
870 stop_pos = littleend - little; /* Actual littlestr len */
875 && ((stop_pos == 1) ||
876 memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
882 Perl_ibcmp(const char *s1, const char *s2, register I32 len)
884 register const U8 *a = (const U8 *)s1;
885 register const U8 *b = (const U8 *)s2;
887 PERL_ARGS_ASSERT_IBCMP;
890 if (*a != *b && *a != PL_fold[*b])
898 Perl_ibcmp_locale(const char *s1, const char *s2, register I32 len)
901 register const U8 *a = (const U8 *)s1;
902 register const U8 *b = (const U8 *)s2;
904 PERL_ARGS_ASSERT_IBCMP_LOCALE;
907 if (*a != *b && *a != PL_fold_locale[*b])
914 /* copy a string to a safe spot */
917 =head1 Memory Management
921 Perl's version of C<strdup()>. Returns a pointer to a newly allocated
922 string which is a duplicate of C<pv>. The size of the string is
923 determined by C<strlen()>. The memory allocated for the new string can
924 be freed with the C<Safefree()> function.
930 Perl_savepv(pTHX_ const char *pv)
937 const STRLEN pvlen = strlen(pv)+1;
938 Newx(newaddr, pvlen, char);
939 return (char*)memcpy(newaddr, pv, pvlen);
943 /* same thing but with a known length */
948 Perl's version of what C<strndup()> would be if it existed. Returns a
949 pointer to a newly allocated string which is a duplicate of the first
950 C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
951 the new string can be freed with the C<Safefree()> function.
957 Perl_savepvn(pTHX_ const char *pv, register I32 len)
959 register char *newaddr;
962 Newx(newaddr,len+1,char);
963 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
965 /* might not be null terminated */
967 return (char *) CopyD(pv,newaddr,len,char);
970 return (char *) ZeroD(newaddr,len+1,char);
975 =for apidoc savesharedpv
977 A version of C<savepv()> which allocates the duplicate string in memory
978 which is shared between threads.
983 Perl_savesharedpv(pTHX_ const char *pv)
985 register char *newaddr;
990 pvlen = strlen(pv)+1;
991 newaddr = (char*)PerlMemShared_malloc(pvlen);
993 return write_no_mem();
995 return (char*)memcpy(newaddr, pv, pvlen);
999 =for apidoc savesharedpvn
1001 A version of C<savepvn()> which allocates the duplicate string in memory
1002 which is shared between threads. (With the specific difference that a NULL
1003 pointer is not acceptable)
1008 Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1010 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
1012 PERL_ARGS_ASSERT_SAVESHAREDPVN;
1015 return write_no_mem();
1017 newaddr[len] = '\0';
1018 return (char*)memcpy(newaddr, pv, len);
1022 =for apidoc savesvpv
1024 A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
1025 the passed in SV using C<SvPV()>
1031 Perl_savesvpv(pTHX_ SV *sv)
1034 const char * const pv = SvPV_const(sv, len);
1035 register char *newaddr;
1037 PERL_ARGS_ASSERT_SAVESVPV;
1040 Newx(newaddr,len,char);
1041 return (char *) CopyD(pv,newaddr,len,char);
1045 /* the SV for Perl_form() and mess() is not kept in an arena */
1055 return newSVpvs_flags("", SVs_TEMP);
1060 /* Create as PVMG now, to avoid any upgrading later */
1062 Newxz(any, 1, XPVMG);
1063 SvFLAGS(sv) = SVt_PVMG;
1064 SvANY(sv) = (void*)any;
1066 SvREFCNT(sv) = 1 << 30; /* practically infinite */
1071 #if defined(PERL_IMPLICIT_CONTEXT)
1073 Perl_form_nocontext(const char* pat, ...)
1078 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
1079 va_start(args, pat);
1080 retval = vform(pat, &args);
1084 #endif /* PERL_IMPLICIT_CONTEXT */
1087 =head1 Miscellaneous Functions
1090 Takes a sprintf-style format pattern and conventional
1091 (non-SV) arguments and returns the formatted string.
1093 (char *) Perl_form(pTHX_ const char* pat, ...)
1095 can be used any place a string (char *) is required:
1097 char * s = Perl_form("%d.%d",major,minor);
1099 Uses a single private buffer so if you want to format several strings you
1100 must explicitly copy the earlier strings away (and free the copies when you
1107 Perl_form(pTHX_ const char* pat, ...)
1111 PERL_ARGS_ASSERT_FORM;
1112 va_start(args, pat);
1113 retval = vform(pat, &args);
1119 Perl_vform(pTHX_ const char *pat, va_list *args)
1121 SV * const sv = mess_alloc();
1122 PERL_ARGS_ASSERT_VFORM;
1123 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1127 #if defined(PERL_IMPLICIT_CONTEXT)
1129 Perl_mess_nocontext(const char *pat, ...)
1134 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
1135 va_start(args, pat);
1136 retval = vmess(pat, &args);
1140 #endif /* PERL_IMPLICIT_CONTEXT */
1143 Perl_mess(pTHX_ const char *pat, ...)
1147 PERL_ARGS_ASSERT_MESS;
1148 va_start(args, pat);
1149 retval = vmess(pat, &args);
1155 S_closest_cop(pTHX_ const COP *cop, const OP *o)
1158 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1160 PERL_ARGS_ASSERT_CLOSEST_COP;
1162 if (!o || o == PL_op)
1165 if (o->op_flags & OPf_KIDS) {
1167 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1170 /* If the OP_NEXTSTATE has been optimised away we can still use it
1171 * the get the file and line number. */
1173 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
1174 cop = (const COP *)kid;
1176 /* Keep searching, and return when we've found something. */
1178 new_cop = closest_cop(cop, kid);
1184 /* Nothing found. */
1190 Perl_vmess(pTHX_ const char *pat, va_list *args)
1193 SV * const sv = mess_alloc();
1195 PERL_ARGS_ASSERT_VMESS;
1197 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1198 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
1200 * Try and find the file and line for PL_op. This will usually be
1201 * PL_curcop, but it might be a cop that has been optimised away. We
1202 * can try to find such a cop by searching through the optree starting
1203 * from the sibling of PL_curcop.
1206 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
1211 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
1212 OutCopFILE(cop), (IV)CopLINE(cop));
1213 /* Seems that GvIO() can be untrustworthy during global destruction. */
1214 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1215 && IoLINES(GvIOp(PL_last_in_gv)))
1217 const bool line_mode = (RsSIMPLE(PL_rs) &&
1218 SvCUR(PL_rs) == 1 && *SvPVX_const(PL_rs) == '\n');
1219 Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
1220 PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv),
1221 line_mode ? "line" : "chunk",
1222 (IV)IoLINES(GvIOp(PL_last_in_gv)));
1225 sv_catpvs(sv, " during global destruction");
1226 sv_catpvs(sv, ".\n");
1232 Perl_write_to_stderr(pTHX_ const char* message, int msglen)
1238 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1240 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1241 && (io = GvIO(PL_stderrgv))
1242 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
1249 SAVESPTR(PL_stderrgv);
1252 PUSHSTACKi(PERLSI_MAGIC);
1256 PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
1257 mPUSHp(message, msglen);
1259 call_method("PRINT", G_SCALAR);
1267 /* SFIO can really mess with your errno */
1270 PerlIO * const serr = Perl_error_log;
1272 PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
1273 (void)PerlIO_flush(serr);
1280 /* Common code used by vcroak, vdie, vwarn and vwarner */
1283 S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
1289 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1290 /* sv_2cv might call Perl_croak() or Perl_warner() */
1291 SV * const oldhook = *hook;
1298 cv = sv_2cv(oldhook, &stash, &gv, 0);
1300 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1310 if (warn || message) {
1311 msg = newSVpvn_flags(message, msglen, utf8);
1319 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
1323 call_sv(MUTABLE_SV(cv), G_DISCARD);
1332 S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen,
1336 const char *message;
1339 SV * const msv = vmess(pat, args);
1340 if (PL_errors && SvCUR(PL_errors)) {
1341 sv_catsv(PL_errors, msv);
1342 message = SvPV_const(PL_errors, *msglen);
1343 SvCUR_set(PL_errors, 0);
1346 message = SvPV_const(msv,*msglen);
1347 *utf8 = SvUTF8(msv);
1354 S_vdie_common(aTHX_ message, *msglen, *utf8, FALSE);
1360 S_vdie(pTHX_ const char* pat, va_list *args)
1363 const char *message;
1364 const int was_in_eval = PL_in_eval;
1368 message = vdie_croak_common(pat, args, &msglen, &utf8);
1370 PL_restartop = die_where(message, msglen);
1371 SvFLAGS(ERRSV) |= utf8;
1372 if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
1374 return PL_restartop;
1377 #if defined(PERL_IMPLICIT_CONTEXT)
1379 Perl_die_nocontext(const char* pat, ...)
1384 va_start(args, pat);
1385 o = vdie(pat, &args);
1389 #endif /* PERL_IMPLICIT_CONTEXT */
1392 Perl_die(pTHX_ const char* pat, ...)
1396 va_start(args, pat);
1397 o = vdie(pat, &args);
1403 Perl_vcroak(pTHX_ const char* pat, va_list *args)
1406 const char *message;
1410 message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8);
1413 PL_restartop = die_where(message, msglen);
1414 SvFLAGS(ERRSV) |= utf8;
1418 message = SvPVx_const(ERRSV, msglen);
1420 write_to_stderr(message, msglen);
1424 #if defined(PERL_IMPLICIT_CONTEXT)
1426 Perl_croak_nocontext(const char *pat, ...)
1430 va_start(args, pat);
1435 #endif /* PERL_IMPLICIT_CONTEXT */
1438 =head1 Warning and Dieing
1442 This is the XSUB-writer's interface to Perl's C<die> function.
1443 Normally call this function the same way you call the C C<printf>
1444 function. Calling C<croak> returns control directly to Perl,
1445 sidestepping the normal C order of execution. See C<warn>.
1447 If you want to throw an exception object, assign the object to
1448 C<$@> and then pass C<NULL> to croak():
1450 errsv = get_sv("@", GV_ADD);
1451 sv_setsv(errsv, exception_object);
1458 Perl_croak(pTHX_ const char *pat, ...)
1461 va_start(args, pat);
1468 Perl_vwarn(pTHX_ const char* pat, va_list *args)
1472 SV * const msv = vmess(pat, args);
1473 const I32 utf8 = SvUTF8(msv);
1474 const char * const message = SvPV_const(msv, msglen);
1476 PERL_ARGS_ASSERT_VWARN;
1479 if (vdie_common(message, msglen, utf8, TRUE))
1483 write_to_stderr(message, msglen);
1486 #if defined(PERL_IMPLICIT_CONTEXT)
1488 Perl_warn_nocontext(const char *pat, ...)
1492 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
1493 va_start(args, pat);
1497 #endif /* PERL_IMPLICIT_CONTEXT */
1502 This is the XSUB-writer's interface to Perl's C<warn> function. Call this
1503 function the same way you call the C C<printf> function. See C<croak>.
1509 Perl_warn(pTHX_ const char *pat, ...)
1512 PERL_ARGS_ASSERT_WARN;
1513 va_start(args, pat);
1518 #if defined(PERL_IMPLICIT_CONTEXT)
1520 Perl_warner_nocontext(U32 err, const char *pat, ...)
1524 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
1525 va_start(args, pat);
1526 vwarner(err, pat, &args);
1529 #endif /* PERL_IMPLICIT_CONTEXT */
1532 Perl_warner(pTHX_ U32 err, const char* pat,...)
1535 PERL_ARGS_ASSERT_WARNER;
1536 va_start(args, pat);
1537 vwarner(err, pat, &args);
1542 Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1545 PERL_ARGS_ASSERT_VWARNER;
1546 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
1547 SV * const msv = vmess(pat, args);
1549 const char * const message = SvPV_const(msv, msglen);
1550 const I32 utf8 = SvUTF8(msv);
1554 S_vdie_common(aTHX_ message, msglen, utf8, FALSE);
1557 PL_restartop = die_where(message, msglen);
1558 SvFLAGS(ERRSV) |= utf8;
1561 write_to_stderr(message, msglen);
1565 Perl_vwarn(aTHX_ pat, args);
1569 /* implements the ckWARN? macros */
1572 Perl_ckwarn(pTHX_ U32 w)
1578 && PL_curcop->cop_warnings != pWARN_NONE
1580 PL_curcop->cop_warnings == pWARN_ALL
1581 || isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1582 || (unpackWARN2(w) &&
1583 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1584 || (unpackWARN3(w) &&
1585 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1586 || (unpackWARN4(w) &&
1587 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1592 isLEXWARN_off && PL_dowarn & G_WARN_ON
1597 /* implements the ckWARN?_d macro */
1600 Perl_ckwarn_d(pTHX_ U32 w)
1605 || PL_curcop->cop_warnings == pWARN_ALL
1607 PL_curcop->cop_warnings != pWARN_NONE
1609 isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))
1610 || (unpackWARN2(w) &&
1611 isWARN_on(PL_curcop->cop_warnings, unpackWARN2(w)))
1612 || (unpackWARN3(w) &&
1613 isWARN_on(PL_curcop->cop_warnings, unpackWARN3(w)))
1614 || (unpackWARN4(w) &&
1615 isWARN_on(PL_curcop->cop_warnings, unpackWARN4(w)))
1621 /* Set buffer=NULL to get a new one. */
1623 Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
1625 const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
1626 PERL_UNUSED_CONTEXT;
1627 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
1630 (specialWARN(buffer) ?
1631 PerlMemShared_malloc(len_wanted) :
1632 PerlMemShared_realloc(buffer, len_wanted));
1634 Copy(bits, (buffer + 1), size, char);
1638 /* since we've already done strlen() for both nam and val
1639 * we can use that info to make things faster than
1640 * sprintf(s, "%s=%s", nam, val)
1642 #define my_setenv_format(s, nam, nlen, val, vlen) \
1643 Copy(nam, s, nlen, char); \
1645 Copy(val, s+(nlen+1), vlen, char); \
1646 *(s+(nlen+1+vlen)) = '\0'
1648 #ifdef USE_ENVIRON_ARRAY
1649 /* VMS' my_setenv() is in vms.c */
1650 #if !defined(WIN32) && !defined(NETWARE)
1652 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1656 /* only parent thread can modify process environment */
1657 if (PL_curinterp == aTHX)
1660 #ifndef PERL_USE_SAFE_PUTENV
1661 if (!PL_use_safe_putenv) {
1662 /* most putenv()s leak, so we manipulate environ directly */
1664 register const I32 len = strlen(nam);
1667 /* where does it go? */
1668 for (i = 0; environ[i]; i++) {
1669 if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
1673 if (environ == PL_origenviron) { /* need we copy environment? */
1679 while (environ[max])
1681 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1682 for (j=0; j<max; j++) { /* copy environment */
1683 const int len = strlen(environ[j]);
1684 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1685 Copy(environ[j], tmpenv[j], len+1, char);
1688 environ = tmpenv; /* tell exec where it is now */
1691 safesysfree(environ[i]);
1692 while (environ[i]) {
1693 environ[i] = environ[i+1];
1698 if (!environ[i]) { /* does not exist yet */
1699 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1700 environ[i+1] = NULL; /* make sure it's null terminated */
1703 safesysfree(environ[i]);
1707 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1708 /* all that work just for this */
1709 my_setenv_format(environ[i], nam, nlen, val, vlen);
1712 # if defined(__CYGWIN__) || defined(EPOC) || defined(__SYMBIAN32__) || defined(__riscos__)
1713 # if defined(HAS_UNSETENV)
1715 (void)unsetenv(nam);
1717 (void)setenv(nam, val, 1);
1719 # else /* ! HAS_UNSETENV */
1720 (void)setenv(nam, val, 1);
1721 # endif /* HAS_UNSETENV */
1723 # if defined(HAS_UNSETENV)
1725 (void)unsetenv(nam);
1727 const int nlen = strlen(nam);
1728 const int vlen = strlen(val);
1729 char * const new_env =
1730 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1731 my_setenv_format(new_env, nam, nlen, val, vlen);
1732 (void)putenv(new_env);
1734 # else /* ! HAS_UNSETENV */
1736 const int nlen = strlen(nam);
1742 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1743 /* all that work just for this */
1744 my_setenv_format(new_env, nam, nlen, val, vlen);
1745 (void)putenv(new_env);
1746 # endif /* HAS_UNSETENV */
1747 # endif /* __CYGWIN__ */
1748 #ifndef PERL_USE_SAFE_PUTENV
1754 #else /* WIN32 || NETWARE */
1757 Perl_my_setenv(pTHX_ const char *nam, const char *val)
1760 register char *envstr;
1761 const int nlen = strlen(nam);
1768 Newx(envstr, nlen+vlen+2, char);
1769 my_setenv_format(envstr, nam, nlen, val, vlen);
1770 (void)PerlEnv_putenv(envstr);
1774 #endif /* WIN32 || NETWARE */
1776 #endif /* !VMS && !EPOC*/
1778 #ifdef UNLINK_ALL_VERSIONS
1780 Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
1784 PERL_ARGS_ASSERT_UNLNK;
1786 while (PerlLIO_unlink(f) >= 0)
1788 return retries ? 0 : -1;
1792 /* this is a drop-in replacement for bcopy() */
1793 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
1795 Perl_my_bcopy(register const char *from,register char *to,register I32 len)
1797 char * const retval = to;
1799 PERL_ARGS_ASSERT_MY_BCOPY;
1801 if (from - to >= 0) {
1809 *(--to) = *(--from);
1815 /* this is a drop-in replacement for memset() */
1818 Perl_my_memset(register char *loc, register I32 ch, register I32 len)
1820 char * const retval = loc;
1822 PERL_ARGS_ASSERT_MY_MEMSET;
1830 /* this is a drop-in replacement for bzero() */
1831 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
1833 Perl_my_bzero(register char *loc, register I32 len)
1835 char * const retval = loc;
1837 PERL_ARGS_ASSERT_MY_BZERO;
1845 /* this is a drop-in replacement for memcmp() */
1846 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
1848 Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
1850 register const U8 *a = (const U8 *)s1;
1851 register const U8 *b = (const U8 *)s2;
1854 PERL_ARGS_ASSERT_MY_MEMCMP;
1857 if ((tmp = *a++ - *b++))
1862 #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
1865 /* This vsprintf replacement should generally never get used, since
1866 vsprintf was available in both System V and BSD 2.11. (There may
1867 be some cross-compilation or embedded set-ups where it is needed,
1870 If you encounter a problem in this function, it's probably a symptom
1871 that Configure failed to detect your system's vprintf() function.
1872 See the section on "item vsprintf" in the INSTALL file.
1874 This version may compile on systems with BSD-ish <stdio.h>,
1875 but probably won't on others.
1878 #ifdef USE_CHAR_VSPRINTF
1883 vsprintf(char *dest, const char *pat, void *args)
1887 #if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
1888 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
1889 FILE_cnt(&fakebuf) = 32767;
1891 /* These probably won't compile -- If you really need
1892 this, you'll have to figure out some other method. */
1893 fakebuf._ptr = dest;
1894 fakebuf._cnt = 32767;
1899 fakebuf._flag = _IOWRT|_IOSTRG;
1900 _doprnt(pat, args, &fakebuf); /* what a kludge */
1901 #if defined(STDIO_PTR_LVALUE)
1902 *(FILE_ptr(&fakebuf)++) = '\0';
1904 /* PerlIO has probably #defined away fputc, but we want it here. */
1906 # undef fputc /* XXX Should really restore it later */
1908 (void)fputc('\0', &fakebuf);
1910 #ifdef USE_CHAR_VSPRINTF
1913 return 0; /* perl doesn't use return value */
1917 #endif /* HAS_VPRINTF */
1920 #if BYTEORDER != 0x4321
1922 Perl_my_swap(pTHX_ short s)
1924 #if (BYTEORDER & 1) == 0
1927 result = ((s & 255) << 8) + ((s >> 8) & 255);
1935 Perl_my_htonl(pTHX_ long l)
1939 char c[sizeof(long)];
1942 #if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
1943 #if BYTEORDER == 0x12345678
1946 u.c[0] = (l >> 24) & 255;
1947 u.c[1] = (l >> 16) & 255;
1948 u.c[2] = (l >> 8) & 255;
1952 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1953 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1958 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1959 u.c[o & 0xf] = (l >> s) & 255;
1967 Perl_my_ntohl(pTHX_ long l)
1971 char c[sizeof(long)];
1974 #if BYTEORDER == 0x1234
1975 u.c[0] = (l >> 24) & 255;
1976 u.c[1] = (l >> 16) & 255;
1977 u.c[2] = (l >> 8) & 255;
1981 #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
1982 Perl_croak(aTHX_ "Unknown BYTEORDER\n");
1989 for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
1990 l |= (u.c[o & 0xf] & 255) << s;
1997 #endif /* BYTEORDER != 0x4321 */
2001 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2002 * If these functions are defined,
2003 * the BYTEORDER is neither 0x1234 nor 0x4321.
2004 * However, this is not assumed.
2008 #define HTOLE(name,type) \
2010 name (register type n) \
2014 char c[sizeof(type)]; \
2017 register U32 s = 0; \
2018 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2019 u.c[i] = (n >> s) & 0xFF; \
2024 #define LETOH(name,type) \
2026 name (register type n) \
2030 char c[sizeof(type)]; \
2033 register U32 s = 0; \
2036 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2037 n |= ((type)(u.c[i] & 0xFF)) << s; \
2043 * Big-endian byte order functions.
2046 #define HTOBE(name,type) \
2048 name (register type n) \
2052 char c[sizeof(type)]; \
2055 register U32 s = 8*(sizeof(u.c)-1); \
2056 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2057 u.c[i] = (n >> s) & 0xFF; \
2062 #define BETOH(name,type) \
2064 name (register type n) \
2068 char c[sizeof(type)]; \
2071 register U32 s = 8*(sizeof(u.c)-1); \
2074 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2075 n |= ((type)(u.c[i] & 0xFF)) << s; \
2081 * If we just can't do it...
2084 #define NOT_AVAIL(name,type) \
2086 name (register type n) \
2088 Perl_croak_nocontext(#name "() not available"); \
2089 return n; /* not reached */ \
2093 #if defined(HAS_HTOVS) && !defined(htovs)
2096 #if defined(HAS_HTOVL) && !defined(htovl)
2099 #if defined(HAS_VTOHS) && !defined(vtohs)
2102 #if defined(HAS_VTOHL) && !defined(vtohl)
2106 #ifdef PERL_NEED_MY_HTOLE16
2108 HTOLE(Perl_my_htole16,U16)
2110 NOT_AVAIL(Perl_my_htole16,U16)
2113 #ifdef PERL_NEED_MY_LETOH16
2115 LETOH(Perl_my_letoh16,U16)
2117 NOT_AVAIL(Perl_my_letoh16,U16)
2120 #ifdef PERL_NEED_MY_HTOBE16
2122 HTOBE(Perl_my_htobe16,U16)
2124 NOT_AVAIL(Perl_my_htobe16,U16)
2127 #ifdef PERL_NEED_MY_BETOH16
2129 BETOH(Perl_my_betoh16,U16)
2131 NOT_AVAIL(Perl_my_betoh16,U16)
2135 #ifdef PERL_NEED_MY_HTOLE32
2137 HTOLE(Perl_my_htole32,U32)
2139 NOT_AVAIL(Perl_my_htole32,U32)
2142 #ifdef PERL_NEED_MY_LETOH32
2144 LETOH(Perl_my_letoh32,U32)
2146 NOT_AVAIL(Perl_my_letoh32,U32)
2149 #ifdef PERL_NEED_MY_HTOBE32
2151 HTOBE(Perl_my_htobe32,U32)
2153 NOT_AVAIL(Perl_my_htobe32,U32)
2156 #ifdef PERL_NEED_MY_BETOH32
2158 BETOH(Perl_my_betoh32,U32)
2160 NOT_AVAIL(Perl_my_betoh32,U32)
2164 #ifdef PERL_NEED_MY_HTOLE64
2166 HTOLE(Perl_my_htole64,U64)
2168 NOT_AVAIL(Perl_my_htole64,U64)
2171 #ifdef PERL_NEED_MY_LETOH64
2173 LETOH(Perl_my_letoh64,U64)
2175 NOT_AVAIL(Perl_my_letoh64,U64)
2178 #ifdef PERL_NEED_MY_HTOBE64
2180 HTOBE(Perl_my_htobe64,U64)
2182 NOT_AVAIL(Perl_my_htobe64,U64)
2185 #ifdef PERL_NEED_MY_BETOH64
2187 BETOH(Perl_my_betoh64,U64)
2189 NOT_AVAIL(Perl_my_betoh64,U64)
2193 #ifdef PERL_NEED_MY_HTOLES
2194 HTOLE(Perl_my_htoles,short)
2196 #ifdef PERL_NEED_MY_LETOHS
2197 LETOH(Perl_my_letohs,short)
2199 #ifdef PERL_NEED_MY_HTOBES
2200 HTOBE(Perl_my_htobes,short)
2202 #ifdef PERL_NEED_MY_BETOHS
2203 BETOH(Perl_my_betohs,short)
2206 #ifdef PERL_NEED_MY_HTOLEI
2207 HTOLE(Perl_my_htolei,int)
2209 #ifdef PERL_NEED_MY_LETOHI
2210 LETOH(Perl_my_letohi,int)
2212 #ifdef PERL_NEED_MY_HTOBEI
2213 HTOBE(Perl_my_htobei,int)
2215 #ifdef PERL_NEED_MY_BETOHI
2216 BETOH(Perl_my_betohi,int)
2219 #ifdef PERL_NEED_MY_HTOLEL
2220 HTOLE(Perl_my_htolel,long)
2222 #ifdef PERL_NEED_MY_LETOHL
2223 LETOH(Perl_my_letohl,long)
2225 #ifdef PERL_NEED_MY_HTOBEL
2226 HTOBE(Perl_my_htobel,long)
2228 #ifdef PERL_NEED_MY_BETOHL
2229 BETOH(Perl_my_betohl,long)
2233 Perl_my_swabn(void *ptr, int n)
2235 register char *s = (char *)ptr;
2236 register char *e = s + (n-1);
2239 PERL_ARGS_ASSERT_MY_SWABN;
2241 for (n /= 2; n > 0; s++, e--, n--) {
2249 Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
2251 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
2254 register I32 This, that;
2260 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2262 PERL_FLUSHALL_FOR_CHILD;
2263 This = (*mode == 'w');
2267 taint_proper("Insecure %s%s", "EXEC");
2269 if (PerlProc_pipe(p) < 0)
2271 /* Try for another pipe pair for error return */
2272 if (PerlProc_pipe(pp) >= 0)
2274 while ((pid = PerlProc_fork()) < 0) {
2275 if (errno != EAGAIN) {
2276 PerlLIO_close(p[This]);
2277 PerlLIO_close(p[that]);
2279 PerlLIO_close(pp[0]);
2280 PerlLIO_close(pp[1]);
2284 if (ckWARN(WARN_PIPE))
2285 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
2294 /* Close parent's end of error status pipe (if any) */
2296 PerlLIO_close(pp[0]);
2297 #if defined(HAS_FCNTL) && defined(F_SETFD)
2298 /* Close error pipe automatically if exec works */
2299 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2302 /* Now dup our end of _the_ pipe to right position */
2303 if (p[THIS] != (*mode == 'r')) {
2304 PerlLIO_dup2(p[THIS], *mode == 'r');
2305 PerlLIO_close(p[THIS]);
2306 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2307 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2310 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
2311 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2312 /* No automatic close - do it by hand */
2319 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
2325 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
2331 do_execfree(); /* free any memory malloced by child on fork */
2333 PerlLIO_close(pp[1]);
2334 /* Keep the lower of the two fd numbers */
2335 if (p[that] < p[This]) {
2336 PerlLIO_dup2(p[This], p[that]);
2337 PerlLIO_close(p[This]);
2341 PerlLIO_close(p[that]); /* close child's end of pipe */
2343 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2344 SvUPGRADE(sv,SVt_IV);
2346 PL_forkprocess = pid;
2347 /* If we managed to get status pipe check for exec fail */
2348 if (did_pipes && pid > 0) {
2353 while (n < sizeof(int)) {
2354 n1 = PerlLIO_read(pp[0],
2355 (void*)(((char*)&errkid)+n),
2361 PerlLIO_close(pp[0]);
2363 if (n) { /* Error */
2365 PerlLIO_close(p[This]);
2366 if (n != sizeof(int))
2367 Perl_croak(aTHX_ "panic: kid popen errno read");
2369 pid2 = wait4pid(pid, &status, 0);
2370 } while (pid2 == -1 && errno == EINTR);
2371 errno = errkid; /* Propagate errno from kid */
2376 PerlLIO_close(pp[0]);
2377 return PerlIO_fdopen(p[This], mode);
2379 # ifdef OS2 /* Same, without fork()ing and all extra overhead... */
2380 return my_syspopen4(aTHX_ NULL, mode, n, args);
2382 Perl_croak(aTHX_ "List form of piped open not implemented");
2383 return (PerlIO *) NULL;
2388 /* VMS' my_popen() is in VMS.c, same with OS/2. */
2389 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(__LIBCATAMOUNT__)
2391 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2395 register I32 This, that;
2398 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
2402 PERL_ARGS_ASSERT_MY_POPEN;
2404 PERL_FLUSHALL_FOR_CHILD;
2407 return my_syspopen(aTHX_ cmd,mode);
2410 This = (*mode == 'w');
2412 if (doexec && PL_tainting) {
2414 taint_proper("Insecure %s%s", "EXEC");
2416 if (PerlProc_pipe(p) < 0)
2418 if (doexec && PerlProc_pipe(pp) >= 0)
2420 while ((pid = PerlProc_fork()) < 0) {
2421 if (errno != EAGAIN) {
2422 PerlLIO_close(p[This]);
2423 PerlLIO_close(p[that]);
2425 PerlLIO_close(pp[0]);
2426 PerlLIO_close(pp[1]);
2429 Perl_croak(aTHX_ "Can't fork: %s", Strerror(errno));
2432 if (ckWARN(WARN_PIPE))
2433 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
2444 PerlLIO_close(pp[0]);
2445 #if defined(HAS_FCNTL) && defined(F_SETFD)
2446 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2449 if (p[THIS] != (*mode == 'r')) {
2450 PerlLIO_dup2(p[THIS], *mode == 'r');
2451 PerlLIO_close(p[THIS]);
2452 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2453 PerlLIO_close(p[THAT]);
2456 PerlLIO_close(p[THAT]);
2459 #if !defined(HAS_FCNTL) || !defined(F_SETFD)
2466 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2471 /* may or may not use the shell */
2472 do_exec3(cmd, pp[1], did_pipes);
2475 #endif /* defined OS2 */
2477 #ifdef PERLIO_USING_CRLF
2478 /* Since we circumvent IO layers when we manipulate low-level
2479 filedescriptors directly, need to manually switch to the
2480 default, binary, low-level mode; see PerlIOBuf_open(). */
2481 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2484 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
2485 SvREADONLY_off(GvSV(tmpgv));
2486 sv_setiv(GvSV(tmpgv), PerlProc_getpid());
2487 SvREADONLY_on(GvSV(tmpgv));
2489 #ifdef THREADS_HAVE_PIDS
2490 PL_ppid = (IV)getppid();
2493 #ifdef PERL_USES_PL_PIDSTATUS
2494 hv_clear(PL_pidstatus); /* we have no children */
2500 do_execfree(); /* free any memory malloced by child on vfork */
2502 PerlLIO_close(pp[1]);
2503 if (p[that] < p[This]) {
2504 PerlLIO_dup2(p[This], p[that]);
2505 PerlLIO_close(p[This]);
2509 PerlLIO_close(p[that]);
2511 sv = *av_fetch(PL_fdpid,p[This],TRUE);
2512 SvUPGRADE(sv,SVt_IV);
2514 PL_forkprocess = pid;
2515 if (did_pipes && pid > 0) {
2520 while (n < sizeof(int)) {
2521 n1 = PerlLIO_read(pp[0],
2522 (void*)(((char*)&errkid)+n),
2528 PerlLIO_close(pp[0]);
2530 if (n) { /* Error */
2532 PerlLIO_close(p[This]);
2533 if (n != sizeof(int))
2534 Perl_croak(aTHX_ "panic: kid popen errno read");
2536 pid2 = wait4pid(pid, &status, 0);
2537 } while (pid2 == -1 && errno == EINTR);
2538 errno = errkid; /* Propagate errno from kid */
2543 PerlLIO_close(pp[0]);
2544 return PerlIO_fdopen(p[This], mode);
2547 #if defined(atarist) || defined(EPOC)
2550 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2552 PERL_ARGS_ASSERT_MY_POPEN;
2553 PERL_FLUSHALL_FOR_CHILD;
2554 /* Call system's popen() to get a FILE *, then import it.
2555 used 0 for 2nd parameter to PerlIO_importFILE;
2558 return PerlIO_importFILE(popen(cmd, mode), 0);
2562 FILE *djgpp_popen();
2564 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2566 PERL_FLUSHALL_FOR_CHILD;
2567 /* Call system's popen() to get a FILE *, then import it.
2568 used 0 for 2nd parameter to PerlIO_importFILE;
2571 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2574 #if defined(__LIBCATAMOUNT__)
2576 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2584 #endif /* !DOSISH */
2586 /* this is called in parent before the fork() */
2588 Perl_atfork_lock(void)
2591 #if defined(USE_ITHREADS)
2592 /* locks must be held in locking order (if any) */
2594 MUTEX_LOCK(&PL_malloc_mutex);
2600 /* this is called in both parent and child after the fork() */
2602 Perl_atfork_unlock(void)
2605 #if defined(USE_ITHREADS)
2606 /* locks must be released in same order as in atfork_lock() */
2608 MUTEX_UNLOCK(&PL_malloc_mutex);
2617 #if defined(HAS_FORK)
2619 #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
2624 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2625 * handlers elsewhere in the code */
2630 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2631 Perl_croak_nocontext("fork() not available");
2633 #endif /* HAS_FORK */
2638 Perl_dump_fds(pTHX_ const char *const s)
2643 PERL_ARGS_ASSERT_DUMP_FDS;
2645 PerlIO_printf(Perl_debug_log,"%s", s);
2646 for (fd = 0; fd < 32; fd++) {
2647 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
2648 PerlIO_printf(Perl_debug_log," %d",fd);
2650 PerlIO_printf(Perl_debug_log,"\n");
2653 #endif /* DUMP_FDS */
2657 dup2(int oldfd, int newfd)
2659 #if defined(HAS_FCNTL) && defined(F_DUPFD)
2662 PerlLIO_close(newfd);
2663 return fcntl(oldfd, F_DUPFD, newfd);
2665 #define DUP2_MAX_FDS 256
2666 int fdtmp[DUP2_MAX_FDS];
2672 PerlLIO_close(newfd);
2673 /* good enough for low fd's... */
2674 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
2675 if (fdx >= DUP2_MAX_FDS) {
2683 PerlLIO_close(fdtmp[--fdx]);
2690 #ifdef HAS_SIGACTION
2693 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2696 struct sigaction act, oact;
2699 /* only "parent" interpreter can diddle signals */
2700 if (PL_curinterp != aTHX)
2701 return (Sighandler_t) SIG_ERR;
2704 act.sa_handler = (void(*)(int))handler;
2705 sigemptyset(&act.sa_mask);
2708 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2709 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2711 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2712 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2713 act.sa_flags |= SA_NOCLDWAIT;
2715 if (sigaction(signo, &act, &oact) == -1)
2716 return (Sighandler_t) SIG_ERR;
2718 return (Sighandler_t) oact.sa_handler;
2722 Perl_rsignal_state(pTHX_ int signo)
2724 struct sigaction oact;
2725 PERL_UNUSED_CONTEXT;
2727 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
2728 return (Sighandler_t) SIG_ERR;
2730 return (Sighandler_t) oact.sa_handler;
2734 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2737 struct sigaction act;
2739 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2742 /* only "parent" interpreter can diddle signals */
2743 if (PL_curinterp != aTHX)
2747 act.sa_handler = (void(*)(int))handler;
2748 sigemptyset(&act.sa_mask);
2751 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2752 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
2754 #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
2755 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
2756 act.sa_flags |= SA_NOCLDWAIT;
2758 return sigaction(signo, &act, save);
2762 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2766 /* only "parent" interpreter can diddle signals */
2767 if (PL_curinterp != aTHX)
2771 return sigaction(signo, save, (struct sigaction *)NULL);
2774 #else /* !HAS_SIGACTION */
2777 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
2779 #if defined(USE_ITHREADS) && !defined(WIN32)
2780 /* only "parent" interpreter can diddle signals */
2781 if (PL_curinterp != aTHX)
2782 return (Sighandler_t) SIG_ERR;
2785 return PerlProc_signal(signo, handler);
2796 Perl_rsignal_state(pTHX_ int signo)
2799 Sighandler_t oldsig;
2801 #if defined(USE_ITHREADS) && !defined(WIN32)
2802 /* only "parent" interpreter can diddle signals */
2803 if (PL_curinterp != aTHX)
2804 return (Sighandler_t) SIG_ERR;
2808 oldsig = PerlProc_signal(signo, sig_trap);
2809 PerlProc_signal(signo, oldsig);
2811 PerlProc_kill(PerlProc_getpid(), signo);
2816 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
2818 #if defined(USE_ITHREADS) && !defined(WIN32)
2819 /* only "parent" interpreter can diddle signals */
2820 if (PL_curinterp != aTHX)
2823 *save = PerlProc_signal(signo, handler);
2824 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
2828 Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
2830 #if defined(USE_ITHREADS) && !defined(WIN32)
2831 /* only "parent" interpreter can diddle signals */
2832 if (PL_curinterp != aTHX)
2835 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
2838 #endif /* !HAS_SIGACTION */
2839 #endif /* !PERL_MICRO */
2841 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
2842 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(__LIBCATAMOUNT__)
2844 Perl_my_pclose(pTHX_ PerlIO *ptr)
2847 Sigsave_t hstat, istat, qstat;
2855 svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
2856 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
2858 *svp = &PL_sv_undef;
2860 if (pid == -1) { /* Opened by popen. */
2861 return my_syspclose(ptr);
2864 close_failed = (PerlIO_close(ptr) == EOF);
2867 if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
2870 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
2871 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
2872 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
2875 pid2 = wait4pid(pid, &status, 0);
2876 } while (pid2 == -1 && errno == EINTR);
2878 rsignal_restore(SIGHUP, &hstat);
2879 rsignal_restore(SIGINT, &istat);
2880 rsignal_restore(SIGQUIT, &qstat);
2886 return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
2889 #if defined(__LIBCATAMOUNT__)
2891 Perl_my_pclose(pTHX_ PerlIO *ptr)
2896 #endif /* !DOSISH */
2898 #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(__LIBCATAMOUNT__)
2900 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
2904 PERL_ARGS_ASSERT_WAIT4PID;
2907 #ifdef PERL_USES_PL_PIDSTATUS
2910 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
2911 pid, rather than a string form. */
2912 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
2913 if (svp && *svp != &PL_sv_undef) {
2914 *statusp = SvIVX(*svp);
2915 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
2923 hv_iterinit(PL_pidstatus);
2924 if ((entry = hv_iternext(PL_pidstatus))) {
2925 SV * const sv = hv_iterval(PL_pidstatus,entry);
2927 const char * const spid = hv_iterkey(entry,&len);
2929 assert (len == sizeof(Pid_t));
2930 memcpy((char *)&pid, spid, len);
2931 *statusp = SvIVX(sv);
2932 /* The hash iterator is currently on this entry, so simply
2933 calling hv_delete would trigger the lazy delete, which on
2934 aggregate does more work, beacuse next call to hv_iterinit()
2935 would spot the flag, and have to call the delete routine,
2936 while in the meantime any new entries can't re-use that
2938 hv_iterinit(PL_pidstatus);
2939 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
2946 # ifdef HAS_WAITPID_RUNTIME
2947 if (!HAS_WAITPID_RUNTIME)
2950 result = PerlProc_waitpid(pid,statusp,flags);
2953 #if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
2954 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
2957 #ifdef PERL_USES_PL_PIDSTATUS
2958 #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
2963 Perl_croak(aTHX_ "Can't do waitpid with flags");
2965 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
2966 pidgone(result,*statusp);
2972 #if defined(HAS_WAITPID) || defined(HAS_WAIT4)
2975 if (result < 0 && errno == EINTR) {
2977 errno = EINTR; /* reset in case a signal handler changed $! */
2981 #endif /* !DOSISH || OS2 || WIN32 || NETWARE */
2983 #ifdef PERL_USES_PL_PIDSTATUS
2985 S_pidgone(pTHX_ Pid_t pid, int status)
2989 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
2990 SvUPGRADE(sv,SVt_IV);
2991 SvIV_set(sv, status);
2996 #if defined(atarist) || defined(OS2) || defined(EPOC)
2999 int /* Cannot prototype with I32
3001 my_syspclose(PerlIO *ptr)
3004 Perl_my_pclose(pTHX_ PerlIO *ptr)
3007 /* Needs work for PerlIO ! */
3008 FILE * const f = PerlIO_findFILE(ptr);
3009 const I32 result = pclose(f);
3010 PerlIO_releaseFILE(ptr,f);
3018 Perl_my_pclose(pTHX_ PerlIO *ptr)
3020 /* Needs work for PerlIO ! */
3021 FILE * const f = PerlIO_findFILE(ptr);
3022 I32 result = djgpp_pclose(f);
3023 result = (result << 8) & 0xff00;
3024 PerlIO_releaseFILE(ptr,f);
3029 #define PERL_REPEATCPY_LINEAR 4
3031 Perl_repeatcpy(register char *to, register const char *from, I32 len, register I32 count)
3033 PERL_ARGS_ASSERT_REPEATCPY;
3036 memset(to, *from, count);
3038 register char *p = to;
3039 I32 items, linear, half;
3041 linear = count < PERL_REPEATCPY_LINEAR ? count : PERL_REPEATCPY_LINEAR;
3042 for (items = 0; items < linear; ++items) {
3043 register const char *q = from;
3045 for (todo = len; todo > 0; todo--)
3050 while (items <= half) {
3051 I32 size = items * len;
3052 memcpy(p, to, size);
3058 memcpy(p, to, (count - items) * len);
3064 Perl_same_dirent(pTHX_ const char *a, const char *b)
3066 char *fa = strrchr(a,'/');
3067 char *fb = strrchr(b,'/');
3070 SV * const tmpsv = sv_newmortal();
3072 PERL_ARGS_ASSERT_SAME_DIRENT;
3085 sv_setpvs(tmpsv, ".");
3087 sv_setpvn(tmpsv, a, fa - a);
3088 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
3091 sv_setpvs(tmpsv, ".");
3093 sv_setpvn(tmpsv, b, fb - b);
3094 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
3096 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3097 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3099 #endif /* !HAS_RENAME */
3102 Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3103 const char *const *const search_ext, I32 flags)
3106 const char *xfound = NULL;
3107 char *xfailed = NULL;
3108 char tmpbuf[MAXPATHLEN];
3113 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
3114 # define SEARCH_EXTS ".bat", ".cmd", NULL
3115 # define MAX_EXT_LEN 4
3118 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3119 # define MAX_EXT_LEN 4
3122 # define SEARCH_EXTS ".pl", ".com", NULL
3123 # define MAX_EXT_LEN 4
3125 /* additional extensions to try in each dir if scriptname not found */
3127 static const char *const exts[] = { SEARCH_EXTS };
3128 const char *const *const ext = search_ext ? search_ext : exts;
3129 int extidx = 0, i = 0;
3130 const char *curext = NULL;
3132 PERL_UNUSED_ARG(search_ext);
3133 # define MAX_EXT_LEN 0
3136 PERL_ARGS_ASSERT_FIND_SCRIPT;
3139 * If dosearch is true and if scriptname does not contain path
3140 * delimiters, search the PATH for scriptname.
3142 * If SEARCH_EXTS is also defined, will look for each
3143 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3144 * while searching the PATH.
3146 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3147 * proceeds as follows:
3148 * If DOSISH or VMSISH:
3149 * + look for ./scriptname{,.foo,.bar}
3150 * + search the PATH for scriptname{,.foo,.bar}
3153 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3154 * this will not look in '.' if it's not in the PATH)
3159 # ifdef ALWAYS_DEFTYPES
3160 len = strlen(scriptname);
3161 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
3162 int idx = 0, deftypes = 1;
3165 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
3168 int idx = 0, deftypes = 1;
3171 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
3173 /* The first time through, just add SEARCH_EXTS to whatever we
3174 * already have, so we can check for default file types. */
3176 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
3182 if ((strlen(tmpbuf) + strlen(scriptname)
3183 + MAX_EXT_LEN) >= sizeof tmpbuf)
3184 continue; /* don't search dir with too-long name */
3185 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
3189 if (strEQ(scriptname, "-"))
3191 if (dosearch) { /* Look in '.' first. */
3192 const char *cur = scriptname;
3194 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3196 if (strEQ(ext[i++],curext)) {
3197 extidx = -1; /* already has an ext */
3202 DEBUG_p(PerlIO_printf(Perl_debug_log,
3203 "Looking for %s\n",cur));
3204 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3205 && !S_ISDIR(PL_statbuf.st_mode)) {
3213 if (cur == scriptname) {
3214 len = strlen(scriptname);
3215 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
3217 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3220 } while (extidx >= 0 && ext[extidx] /* try an extension? */
3221 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
3226 if (dosearch && !strchr(scriptname, '/')
3228 && !strchr(scriptname, '\\')
3230 && (s = PerlEnv_getenv("PATH")))
3234 bufend = s + strlen(s);
3235 while (s < bufend) {
3236 #if defined(atarist) || defined(DOSISH)
3241 && *s != ';'; len++, s++) {
3242 if (len < sizeof tmpbuf)
3245 if (len < sizeof tmpbuf)
3247 #else /* ! (atarist || DOSISH) */
3248 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
3251 #endif /* ! (atarist || DOSISH) */
3254 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
3255 continue; /* don't search dir with too-long name */
3257 # if defined(atarist) || defined(DOSISH)
3258 && tmpbuf[len - 1] != '/'
3259 && tmpbuf[len - 1] != '\\'
3262 tmpbuf[len++] = '/';
3263 if (len == 2 && tmpbuf[0] == '.')
3265 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
3269 len = strlen(tmpbuf);
3270 if (extidx > 0) /* reset after previous loop */
3274 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3275 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
3276 if (S_ISDIR(PL_statbuf.st_mode)) {
3280 } while ( retval < 0 /* not there */
3281 && extidx>=0 && ext[extidx] /* try an extension? */
3282 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
3287 if (S_ISREG(PL_statbuf.st_mode)
3288 && cando(S_IRUSR,TRUE,&PL_statbuf)
3289 #if !defined(DOSISH)
3290 && cando(S_IXUSR,TRUE,&PL_statbuf)
3294 xfound = tmpbuf; /* bingo! */
3298 xfailed = savepv(tmpbuf);
3301 if (!xfound && !seen_dot && !xfailed &&
3302 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
3303 || S_ISDIR(PL_statbuf.st_mode)))
3305 seen_dot = 1; /* Disable message. */
3307 if (flags & 1) { /* do or die? */
3308 Perl_croak(aTHX_ "Can't %s %s%s%s",
3309 (xfailed ? "execute" : "find"),
3310 (xfailed ? xfailed : scriptname),
3311 (xfailed ? "" : " on PATH"),
3312 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3317 scriptname = xfound;
3319 return (scriptname ? savepv(scriptname) : NULL);
3322 #ifndef PERL_GET_CONTEXT_DEFINED
3325 Perl_get_context(void)
3328 #if defined(USE_ITHREADS)
3329 # ifdef OLD_PTHREADS_API
3331 if (pthread_getspecific(PL_thr_key, &t))
3332 Perl_croak_nocontext("panic: pthread_getspecific");
3335 # ifdef I_MACH_CTHREADS
3336 return (void*)cthread_data(cthread_self());
3338 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3347 Perl_set_context(void *t)
3350 PERL_ARGS_ASSERT_SET_CONTEXT;
3351 #if defined(USE_ITHREADS)
3352 # ifdef I_MACH_CTHREADS
3353 cthread_set_data(cthread_self(), t);
3355 if (pthread_setspecific(PL_thr_key, t))
3356 Perl_croak_nocontext("panic: pthread_setspecific");
3363 #endif /* !PERL_GET_CONTEXT_DEFINED */
3365 #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
3374 Perl_get_op_names(pTHX)
3376 PERL_UNUSED_CONTEXT;
3377 return (char **)PL_op_name;
3381 Perl_get_op_descs(pTHX)
3383 PERL_UNUSED_CONTEXT;
3384 return (char **)PL_op_desc;
3388 Perl_get_no_modify(pTHX)
3390 PERL_UNUSED_CONTEXT;
3391 return PL_no_modify;
3395 Perl_get_opargs(pTHX)
3397 PERL_UNUSED_CONTEXT;
3398 return (U32 *)PL_opargs;
3402 Perl_get_ppaddr(pTHX)
3405 PERL_UNUSED_CONTEXT;
3406 return (PPADDR_t*)PL_ppaddr;
3409 #ifndef HAS_GETENV_LEN
3411 Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
3413 char * const env_trans = PerlEnv_getenv(env_elem);
3414 PERL_UNUSED_CONTEXT;
3415 PERL_ARGS_ASSERT_GETENV_LEN;
3417 *len = strlen(env_trans);
3424 Perl_get_vtbl(pTHX_ int vtbl_id)
3426 const MGVTBL* result;
3427 PERL_UNUSED_CONTEXT;
3431 result = &PL_vtbl_sv;
3434 result = &PL_vtbl_env;
3436 case want_vtbl_envelem:
3437 result = &PL_vtbl_envelem;
3440 result = &PL_vtbl_sig;
3442 case want_vtbl_sigelem:
3443 result = &PL_vtbl_sigelem;
3445 case want_vtbl_pack:
3446 result = &PL_vtbl_pack;
3448 case want_vtbl_packelem:
3449 result = &PL_vtbl_packelem;
3451 case want_vtbl_dbline:
3452 result = &PL_vtbl_dbline;
3455 result = &PL_vtbl_isa;
3457 case want_vtbl_isaelem:
3458 result = &PL_vtbl_isaelem;
3460 case want_vtbl_arylen:
3461 result = &PL_vtbl_arylen;
3463 case want_vtbl_mglob:
3464 result = &PL_vtbl_mglob;
3466 case want_vtbl_nkeys:
3467 result = &PL_vtbl_nkeys;
3469 case want_vtbl_taint:
3470 result = &PL_vtbl_taint;
3472 case want_vtbl_substr:
3473 result = &PL_vtbl_substr;
3476 result = &PL_vtbl_vec;
3479 result = &PL_vtbl_pos;
3482 result = &PL_vtbl_bm;
3485 result = &PL_vtbl_fm;
3487 case want_vtbl_uvar:
3488 result = &PL_vtbl_uvar;
3490 case want_vtbl_defelem:
3491 result = &PL_vtbl_defelem;
3493 case want_vtbl_regexp:
3494 result = &PL_vtbl_regexp;
3496 case want_vtbl_regdata:
3497 result = &PL_vtbl_regdata;
3499 case want_vtbl_regdatum:
3500 result = &PL_vtbl_regdatum;
3502 #ifdef USE_LOCALE_COLLATE
3503 case want_vtbl_collxfrm:
3504 result = &PL_vtbl_collxfrm;
3507 case want_vtbl_amagic:
3508 result = &PL_vtbl_amagic;
3510 case want_vtbl_amagicelem:
3511 result = &PL_vtbl_amagicelem;
3513 case want_vtbl_backref:
3514 result = &PL_vtbl_backref;
3516 case want_vtbl_utf8:
3517 result = &PL_vtbl_utf8;
3523 return (MGVTBL*)result;
3527 Perl_my_fflush_all(pTHX)
3529 #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
3530 return PerlIO_flush(NULL);
3532 # if defined(HAS__FWALK)
3533 extern int fflush(FILE *);
3534 /* undocumented, unprototyped, but very useful BSDism */
3535 extern void _fwalk(int (*)(FILE *));
3539 # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
3541 # ifdef PERL_FFLUSH_ALL_FOPEN_MAX
3542 open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
3544 # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
3545 open_max = sysconf(_SC_OPEN_MAX);
3548 open_max = FOPEN_MAX;
3551 open_max = OPEN_MAX;
3562 for (i = 0; i < open_max; i++)
3563 if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
3564 STDIO_STREAM_ARRAY[i]._file < open_max &&
3565 STDIO_STREAM_ARRAY[i]._flag)
3566 PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
3570 SETERRNO(EBADF,RMS_IFI);
3577 Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op)
3579 const char * const name = gv && isGV(gv) ? GvENAME(gv) : NULL;
3581 if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
3582 if (ckWARN(WARN_IO)) {
3583 const char * const direction =
3584 (const char *)((op == OP_phoney_INPUT_ONLY) ? "in" : "out");
3586 Perl_warner(aTHX_ packWARN(WARN_IO),
3587 "Filehandle %s opened only for %sput",
3590 Perl_warner(aTHX_ packWARN(WARN_IO),
3591 "Filehandle opened only for %sput", direction);
3598 if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
3600 warn_type = WARN_CLOSED;
3604 warn_type = WARN_UNOPENED;
3607 if (ckWARN(warn_type)) {
3608 const char * const pars =
3609 (const char *)(OP_IS_FILETEST(op) ? "" : "()");
3610 const char * const func =
3612 (op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
3613 op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
3614 op < 0 ? "" : /* handle phoney cases */
3616 const char * const type =
3618 (OP_IS_SOCKET(op) ||
3619 (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ?
3620 "socket" : "filehandle");
3621 if (name && *name) {
3622 Perl_warner(aTHX_ packWARN(warn_type),
3623 "%s%s on %s %s %s", func, pars, vile, type, name);
3624 if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3626 aTHX_ packWARN(warn_type),
3627 "\t(Are you trying to call %s%s on dirhandle %s?)\n",
3632 Perl_warner(aTHX_ packWARN(warn_type),
3633 "%s%s on %s %s", func, pars, vile, type);
3634 if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
3636 aTHX_ packWARN(warn_type),
3637 "\t(Are you trying to call %s%s on dirhandle?)\n",
3646 /* in ASCII order, not that it matters */
3647 static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
3650 Perl_ebcdic_control(pTHX_ int ch)
3658 if ((ctlp = strchr(controllablechars, ch)) == 0) {
3659 Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
3662 if (ctlp == controllablechars)
3663 return('\177'); /* DEL */
3665 return((unsigned char)(ctlp - controllablechars - 1));
3666 } else { /* Want uncontrol */
3667 if (ch == '\177' || ch == -1)
3669 else if (ch == '\157')
3671 else if (ch == '\174')
3673 else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
3675 else if (ch == '\155')
3677 else if (0 < ch && ch < (sizeof(controllablechars) - 1))
3678 return(controllablechars[ch+1]);
3680 Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
3685 /* To workaround core dumps from the uninitialised tm_zone we get the
3686 * system to give us a reasonable struct to copy. This fix means that
3687 * strftime uses the tm_zone and tm_gmtoff values returned by
3688 * localtime(time()). That should give the desired result most of the
3689 * time. But probably not always!
3691 * This does not address tzname aspects of NETaa14816.
3696 # ifndef STRUCT_TM_HASZONE
3697 # define STRUCT_TM_HASZONE
3701 #ifdef STRUCT_TM_HASZONE /* Backward compat */
3702 # ifndef HAS_TM_TM_ZONE
3703 # define HAS_TM_TM_ZONE
3708 Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
3710 #ifdef HAS_TM_TM_ZONE
3712 const struct tm* my_tm;
3713 PERL_ARGS_ASSERT_INIT_TM;
3715 my_tm = localtime(&now);
3717 Copy(my_tm, ptm, 1, struct tm);
3719 PERL_ARGS_ASSERT_INIT_TM;
3720 PERL_UNUSED_ARG(ptm);
3725 * mini_mktime - normalise struct tm values without the localtime()
3726 * semantics (and overhead) of mktime().
3729 Perl_mini_mktime(pTHX_ struct tm *ptm)
3733 int month, mday, year, jday;
3734 int odd_cent, odd_year;
3735 PERL_UNUSED_CONTEXT;
3737 PERL_ARGS_ASSERT_MINI_MKTIME;
3739 #define DAYS_PER_YEAR 365
3740 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
3741 #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
3742 #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
3743 #define SECS_PER_HOUR (60*60)
3744 #define SECS_PER_DAY (24*SECS_PER_HOUR)
3745 /* parentheses deliberately absent on these two, otherwise they don't work */
3746 #define MONTH_TO_DAYS 153/5
3747 #define DAYS_TO_MONTH 5/153
3748 /* offset to bias by March (month 4) 1st between month/mday & year finding */
3749 #define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
3750 /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
3751 #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
3754 * Year/day algorithm notes:
3756 * With a suitable offset for numeric value of the month, one can find
3757 * an offset into the year by considering months to have 30.6 (153/5) days,
3758 * using integer arithmetic (i.e., with truncation). To avoid too much
3759 * messing about with leap days, we consider January and February to be
3760 * the 13th and 14th month of the previous year. After that transformation,
3761 * we need the month index we use to be high by 1 from 'normal human' usage,
3762 * so the month index values we use run from 4 through 15.
3764 * Given that, and the rules for the Gregorian calendar (leap years are those
3765 * divisible by 4 unless also divisible by 100, when they must be divisible
3766 * by 400 instead), we can simply calculate the number of days since some
3767 * arbitrary 'beginning of time' by futzing with the (adjusted) year number,
3768 * the days we derive from our month index, and adding in the day of the
3769 * month. The value used here is not adjusted for the actual origin which
3770 * it normally would use (1 January A.D. 1), since we're not exposing it.
3771 * We're only building the value so we can turn around and get the
3772 * normalised values for the year, month, day-of-month, and day-of-year.
3774 * For going backward, we need to bias the value we're using so that we find
3775 * the right year value. (Basically, we don't want the contribution of
3776 * March 1st to the number to apply while deriving the year). Having done
3777 * that, we 'count up' the contribution to the year number by accounting for
3778 * full quadracenturies (400-year periods) with their extra leap days, plus
3779 * the contribution from full centuries (to avoid counting in the lost leap
3780 * days), plus the contribution from full quad-years (to count in the normal
3781 * leap days), plus the leftover contribution from any non-leap years.
3782 * At this point, if we were working with an actual leap day, we'll have 0
3783 * days left over. This is also true for March 1st, however. So, we have
3784 * to special-case that result, and (earlier) keep track of the 'odd'
3785 * century and year contributions. If we got 4 extra centuries in a qcent,
3786 * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
3787 * Otherwise, we add back in the earlier bias we removed (the 123 from
3788 * figuring in March 1st), find the month index (integer division by 30.6),
3789 * and the remainder is the day-of-month. We then have to convert back to
3790 * 'real' months (including fixing January and February from being 14/15 in
3791 * the previous year to being in the proper year). After that, to get
3792 * tm_yday, we work with the normalised year and get a new yearday value for
3793 * January 1st, which we subtract from the yearday value we had earlier,
3794 * representing the date we've re-built. This is done from January 1
3795 * because tm_yday is 0-origin.
3797 * Since POSIX time routines are only guaranteed to work for times since the
3798 * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
3799 * applies Gregorian calendar rules even to dates before the 16th century
3800 * doesn't bother me. Besides, you'd need cultural context for a given
3801 * date to know whether it was Julian or Gregorian calendar, and that's
3802 * outside the scope for this routine. Since we convert back based on the
3803 * same rules we used to build the yearday, you'll only get strange results
3804 * for input which needed normalising, or for the 'odd' century years which
3805 * were leap years in the Julian calander but not in the Gregorian one.
3806 * I can live with that.
3808 * This algorithm also fails to handle years before A.D. 1 gracefully, but
3809 * that's still outside the scope for POSIX time manipulation, so I don't
3813 year = 1900 + ptm->tm_year;
3814 month = ptm->tm_mon;
3815 mday = ptm->tm_mday;
3816 /* allow given yday with no month & mday to dominate the result */
3817 if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
3820 jday = 1 + ptm->tm_yday;
3829 yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
3830 yearday += month*MONTH_TO_DAYS + mday + jday;
3832 * Note that we don't know when leap-seconds were or will be,
3833 * so we have to trust the user if we get something which looks
3834 * like a sensible leap-second. Wild values for seconds will
3835 * be rationalised, however.
3837 if ((unsigned) ptm->tm_sec <= 60) {
3844 secs += 60 * ptm->tm_min;
3845 secs += SECS_PER_HOUR * ptm->tm_hour;
3847 if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
3848 /* got negative remainder, but need positive time */
3849 /* back off an extra day to compensate */
3850 yearday += (secs/SECS_PER_DAY)-1;
3851 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
3854 yearday += (secs/SECS_PER_DAY);
3855 secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
3858 else if (secs >= SECS_PER_DAY) {
3859 yearday += (secs/SECS_PER_DAY);
3860 secs %= SECS_PER_DAY;
3862 ptm->tm_hour = secs/SECS_PER_HOUR;
3863 secs %= SECS_PER_HOUR;
3864 ptm->tm_min = secs/60;
3866 ptm->tm_sec += secs;
3867 /* done with time of day effects */
3869 * The algorithm for yearday has (so far) left it high by 428.
3870 * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
3871 * bias it by 123 while trying to figure out what year it
3872 * really represents. Even with this tweak, the reverse
3873 * translation fails for years before A.D. 0001.
3874 * It would still fail for Feb 29, but we catch that one below.
3876 jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
3877 yearday -= YEAR_ADJUST;
3878 year = (yearday / DAYS_PER_QCENT) * 400;
3879 yearday %= DAYS_PER_QCENT;
3880 odd_cent = yearday / DAYS_PER_CENT;
3881 year += odd_cent * 100;
3882 yearday %= DAYS_PER_CENT;
3883 year += (yearday / DAYS_PER_QYEAR) * 4;
3884 yearday %= DAYS_PER_QYEAR;
3885 odd_year = yearday / DAYS_PER_YEAR;
3887 yearday %= DAYS_PER_YEAR;
3888 if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
3893 yearday += YEAR_ADJUST; /* recover March 1st crock */
3894 month = yearday*DAYS_TO_MONTH;
3895 yearday -= month*MONTH_TO_DAYS;
3896 /* recover other leap-year adjustment */
3905 ptm->tm_year = year - 1900;
3907 ptm->tm_mday = yearday;
3908 ptm->tm_mon = month;
3912 ptm->tm_mon = month - 1;
3914 /* re-build yearday based on Jan 1 to get tm_yday */
3916 yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
3917 yearday += 14*MONTH_TO_DAYS + 1;
3918 ptm->tm_yday = jday - yearday;
3919 /* fix tm_wday if not overridden by caller */
3920 if ((unsigned)ptm->tm_wday > 6)
3921 ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
3925 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)
3933 PERL_ARGS_ASSERT_MY_STRFTIME;
3935 init_tm(&mytm); /* XXX workaround - see init_tm() above */
3938 mytm.tm_hour = hour;
3939 mytm.tm_mday = mday;
3941 mytm.tm_year = year;
3942 mytm.tm_wday = wday;
3943 mytm.tm_yday = yday;
3944 mytm.tm_isdst = isdst;
3946 /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
3947 #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
3952 #ifdef HAS_TM_TM_GMTOFF
3953 mytm.tm_gmtoff = mytm2.tm_gmtoff;
3955 #ifdef HAS_TM_TM_ZONE
3956 mytm.tm_zone = mytm2.tm_zone;
3961 Newx(buf, buflen, char);
3962 len = strftime(buf, buflen, fmt, &mytm);
3964 ** The following is needed to handle to the situation where
3965 ** tmpbuf overflows. Basically we want to allocate a buffer
3966 ** and try repeatedly. The reason why it is so complicated
3967 ** is that getting a return value of 0 from strftime can indicate
3968 ** one of the following:
3969 ** 1. buffer overflowed,
3970 ** 2. illegal conversion specifier, or
3971 ** 3. the format string specifies nothing to be returned(not
3972 ** an error). This could be because format is an empty string
3973 ** or it specifies %p that yields an empty string in some locale.
3974 ** If there is a better way to make it portable, go ahead by
3977 if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
3980 /* Possibly buf overflowed - try again with a bigger buf */
3981 const int fmtlen = strlen(fmt);
3982 int bufsize = fmtlen + buflen;
3984 Newx(buf, bufsize, char);
3986 buflen = strftime(buf, bufsize, fmt, &mytm);
3987 if (buflen > 0 && buflen < bufsize)
3989 /* heuristic to prevent out-of-memory errors */
3990 if (bufsize > 100*fmtlen) {
3996 Renew(buf, bufsize, char);
4001 Perl_croak(aTHX_ "panic: no strftime");
4007 #define SV_CWD_RETURN_UNDEF \
4008 sv_setsv(sv, &PL_sv_undef); \
4011 #define SV_CWD_ISDOT(dp) \
4012 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
4013 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
4016 =head1 Miscellaneous Functions
4018 =for apidoc getcwd_sv
4020 Fill the sv with current working directory
4025 /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
4026 * rewritten again by dougm, optimized for use with xs TARG, and to prefer
4027 * getcwd(3) if available
4028 * Comments from the orignal:
4029 * This is a faster version of getcwd. It's also more dangerous
4030 * because you might chdir out of a directory that you can't chdir
4034 Perl_getcwd_sv(pTHX_ register SV *sv)
4038 #ifndef INCOMPLETE_TAINTS
4042 PERL_ARGS_ASSERT_GETCWD_SV;
4046 char buf[MAXPATHLEN];
4048 /* Some getcwd()s automatically allocate a buffer of the given
4049 * size from the heap if they are given a NULL buffer pointer.
4050 * The problem is that this behaviour is not portable. */
4051 if (getcwd(buf, sizeof(buf) - 1)) {
4056 sv_setsv(sv, &PL_sv_undef);
4064 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
4068 SvUPGRADE(sv, SVt_PV);
4070 if (PerlLIO_lstat(".", &statbuf) < 0) {
4071 SV_CWD_RETURN_UNDEF;
4074 orig_cdev = statbuf.st_dev;
4075 orig_cino = statbuf.st_ino;
4085 if (PerlDir_chdir("..") < 0) {
4086 SV_CWD_RETURN_UNDEF;
4088 if (PerlLIO_stat(".", &statbuf) < 0) {
4089 SV_CWD_RETURN_UNDEF;
4092 cdev = statbuf.st_dev;
4093 cino = statbuf.st_ino;
4095 if (odev == cdev && oino == cino) {
4098 if (!(dir = PerlDir_open("."))) {
4099 SV_CWD_RETURN_UNDEF;
4102 while ((dp = PerlDir_read(dir)) != NULL) {
4104 namelen = dp->d_namlen;
4106 namelen = strlen(dp->d_name);
4109 if (SV_CWD_ISDOT(dp)) {
4113 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
4114 SV_CWD_RETURN_UNDEF;
4117 tdev = statbuf.st_dev;
4118 tino = statbuf.st_ino;
4119 if (tino == oino && tdev == odev) {
4125 SV_CWD_RETURN_UNDEF;
4128 if (pathlen + namelen + 1 >= MAXPATHLEN) {
4129 SV_CWD_RETURN_UNDEF;
4132 SvGROW(sv, pathlen + namelen + 1);
4136 Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char);
4139 /* prepend current directory to the front */
4141 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
4142 pathlen += (namelen + 1);
4144 #ifdef VOID_CLOSEDIR
4147 if (PerlDir_close(dir) < 0) {
4148 SV_CWD_RETURN_UNDEF;
4154 SvCUR_set(sv, pathlen);
4158 if (PerlDir_chdir(SvPVX_const(sv)) < 0) {
4159 SV_CWD_RETURN_UNDEF;
4162 if (PerlLIO_stat(".", &statbuf) < 0) {
4163 SV_CWD_RETURN_UNDEF;
4166 cdev = statbuf.st_dev;
4167 cino = statbuf.st_ino;
4169 if (cdev != orig_cdev || cino != orig_cino) {
4170 Perl_croak(aTHX_ "Unstable directory path, "
4171 "current directory changed unexpectedly");
4182 #define VERSION_MAX 0x7FFFFFFF
4184 =for apidoc scan_version
4186 Returns a pointer to the next character after the parsed
4187 version string, as well as upgrading the passed in SV to
4190 Function must be called with an already existing SV like
4193 s = scan_version(s, SV *sv, bool qv);
4195 Performs some preprocessing to the string to ensure that
4196 it has the correct characteristics of a version. Flags the
4197 object if it contains an underscore (which denotes this
4198 is an alpha version). The boolean qv denotes that the version
4199 should be interpreted as if it had multiple decimals, even if
4206 Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
4215 AV * const av = newAV();
4216 SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
4218 PERL_ARGS_ASSERT_SCAN_VERSION;
4220 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4222 while (isSPACE(*s)) /* leading whitespace is OK */
4228 s++; /* get past 'v' */
4229 qv = 1; /* force quoted version processing */
4234 /* pre-scan the input string to check for decimals/underbars */
4235 while ( *pos == '.' || *pos == '_' || *pos == ',' || isDIGIT(*pos) )
4240 Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
4244 else if ( *pos == '_' )
4247 Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
4249 width = pos - last - 1; /* natural width of sub-version */
4251 else if ( *pos == ',' && isDIGIT(pos[1]) )
4260 if ( alpha && !saw_period )
4261 Perl_croak(aTHX_ "Invalid version format (alpha without decimal)");
4263 if ( alpha && saw_period && width == 0 )
4264 Perl_croak(aTHX_ "Invalid version format (misplaced _ in number)");
4266 if ( saw_period > 1 )
4267 qv = 1; /* force quoted version processing */
4273 (void)hv_stores(MUTABLE_HV(hv), "qv", newSViv(qv));
4275 (void)hv_stores(MUTABLE_HV(hv), "alpha", newSViv(alpha));
4276 if ( !qv && width < 3 )
4277 (void)hv_stores(MUTABLE_HV(hv), "width", newSViv(width));
4279 while (isDIGIT(*pos))
4281 if (!isALPHA(*pos)) {
4287 /* this is atoi() that delimits on underscores */
4288 const char *end = pos;
4292 /* the following if() will only be true after the decimal
4293 * point of a version originally created with a bare
4294 * floating point number, i.e. not quoted in any way
4296 if ( !qv && s > start && saw_period == 1 ) {
4300 rev += (*s - '0') * mult;
4302 if ( (PERL_ABS(orev) > PERL_ABS(rev))
4303 || (PERL_ABS(rev) > VERSION_MAX )) {
4304 if(ckWARN(WARN_OVERFLOW))
4305 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
4306 "Integer overflow in version %d",VERSION_MAX);
4317 while (--end >= s) {
4319 rev += (*end - '0') * mult;
4321 if ( (PERL_ABS(orev) > PERL_ABS(rev))
4322 || (PERL_ABS(rev) > VERSION_MAX )) {
4323 if(ckWARN(WARN_OVERFLOW))
4324 Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
4325 "Integer overflow in version");
4334 /* Append revision */
4335 av_push(av, newSViv(rev));
4340 else if ( *pos == '.' )
4342 else if ( *pos == '_' && isDIGIT(pos[1]) )
4344 else if ( *pos == ',' && isDIGIT(pos[1]) )
4346 else if ( isDIGIT(*pos) )
4353 while ( isDIGIT(*pos) )
4358 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
4366 if ( qv ) { /* quoted versions always get at least three terms*/
4367 I32 len = av_len(av);
4368 /* This for loop appears to trigger a compiler bug on OS X, as it
4369 loops infinitely. Yes, len is negative. No, it makes no sense.
4370 Compiler in question is:
4371 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
4372 for ( len = 2 - len; len > 0; len-- )
4373 av_push(MUTABLE_AV(sv), newSViv(0));
4377 av_push(av, newSViv(0));
4380 /* need to save off the current version string for later */
4382 SV * orig = newSVpvn("v.Inf", sizeof("v.Inf")-1);
4383 (void)hv_stores(MUTABLE_HV(hv), "original", orig);
4384 (void)hv_stores(MUTABLE_HV(hv), "vinf", newSViv(1));
4386 else if ( s > start ) {
4387 SV * orig = newSVpvn(start,s-start);
4388 if ( qv && saw_period == 1 && *start != 'v' ) {
4389 /* need to insert a v to be consistent */
4390 sv_insert(orig, 0, 0, "v", 1);
4392 (void)hv_stores(MUTABLE_HV(hv), "original", orig);
4395 (void)hv_stores(MUTABLE_HV(hv), "original", newSVpvs("0"));
4396 av_push(av, newSViv(0));
4399 /* And finally, store the AV in the hash */
4400 (void)hv_stores(MUTABLE_HV(hv), "version", newRV_noinc(MUTABLE_SV(av)));
4402 /* fix RT#19517 - special case 'undef' as string */
4403 if ( *s == 'u' && strEQ(s,"undef") ) {
4411 =for apidoc new_version
4413 Returns a new version object based on the passed in SV:
4415 SV *sv = new_version(SV *ver);
4417 Does not alter the passed in ver SV. See "upg_version" if you
4418 want to upgrade the SV.
4424 Perl_new_version(pTHX_ SV *ver)
4427 SV * const rv = newSV(0);
4428 PERL_ARGS_ASSERT_NEW_VERSION;
4429 if ( sv_derived_from(ver,"version") ) /* can just copy directly */
4432 AV * const av = newAV();
4434 /* This will get reblessed later if a derived class*/
4435 SV * const hv = newSVrv(rv, "version");
4436 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
4441 /* Begin copying all of the elements */
4442 if ( hv_exists(MUTABLE_HV(ver), "qv", 2) )
4443 (void)hv_stores(MUTABLE_HV(hv), "qv", newSViv(1));
4445 if ( hv_exists(MUTABLE_HV(ver), "alpha", 5) )
4446 (void)hv_stores(MUTABLE_HV(hv), "alpha", newSViv(1));
4448 if ( hv_exists(MUTABLE_HV(ver), "width", 5 ) )
4450 const I32 width = SvIV(*hv_fetchs(MUTABLE_HV(ver), "width", FALSE));
4451 (void)hv_stores(MUTABLE_HV(hv), "width", newSViv(width));
4454 if ( hv_exists(MUTABLE_HV(ver), "original", 8 ) )
4456 SV * pv = *hv_fetchs(MUTABLE_HV(ver), "original", FALSE);
4457 (void)hv_stores(MUTABLE_HV(hv), "original", newSVsv(pv));
4460 sav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(ver), "version", FALSE)));
4461 /* This will get reblessed later if a derived class*/
4462 for ( key = 0; key <= av_len(sav); key++ )
4464 const I32 rev = SvIV(*av_fetch(sav, key, FALSE));
4465 av_push(av, newSViv(rev));
4468 (void)hv_stores(MUTABLE_HV(hv), "version", newRV_noinc(MUTABLE_SV(av)));
4473 const MAGIC* const mg = SvVSTRING_mg(ver);
4474 if ( mg ) { /* already a v-string */
4475 const STRLEN len = mg->mg_len;
4476 char * const version = savepvn( (const char*)mg->mg_ptr, len);
4477 sv_setpvn(rv,version,len);
4478 /* this is for consistency with the pure Perl class */
4479 if ( *version != 'v' )
4480 sv_insert(rv, 0, 0, "v", 1);
4485 sv_setsv(rv,ver); /* make a duplicate */
4490 return upg_version(rv, FALSE);
4494 =for apidoc upg_version
4496 In-place upgrade of the supplied SV to a version object.
4498 SV *sv = upg_version(SV *sv, bool qv);
4500 Returns a pointer to the upgraded SV. Set the boolean qv if you want
4501 to force this SV to be interpreted as an "extended" version.
4507 Perl_upg_version(pTHX_ SV *ver, bool qv)
4509 const char *version, *s;
4514 PERL_ARGS_ASSERT_UPG_VERSION;
4516 if ( SvNOK(ver) && !( SvPOK(ver) && sv_len(ver) == 3 ) )
4518 /* may get too much accuracy */
4520 #ifdef USE_LOCALE_NUMERIC
4521 char *loc = setlocale(LC_NUMERIC, "C");
4523 STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVff, SvNVX(ver));
4524 #ifdef USE_LOCALE_NUMERIC
4525 setlocale(LC_NUMERIC, loc);
4527 while (tbuf[len-1] == '0' && len > 0) len--;
4528 if ( tbuf[len-1] == '.' ) len--; /* eat the trailing decimal */
4529 version = savepvn(tbuf, len);
4532 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
4533 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
4537 else /* must be a string or something like a string */
4540 version = savepv(SvPV(ver,len));
4542 # if PERL_VERSION > 5
4543 /* This will only be executed for 5.6.0 - 5.8.0 inclusive */
4544 if ( len == 3 && !instr(version,".") && !instr(version,"_") ) {
4545 /* may be a v-string */
4546 SV * const nsv = sv_newmortal();
4550 sv_setpvf(nsv,"v%vd",ver);
4551 pos = nver = savepv(SvPV_nolen(nsv));
4553 /* scan the resulting formatted string */
4554 pos++; /* skip the leading 'v' */
4555 while ( *pos == '.' || isDIGIT(*pos) ) {
4561 /* is definitely a v-string */
4562 if ( saw_period == 2 ) {
4571 s = scan_version(version, ver, qv);
4573 if(ckWARN(WARN_MISC))
4574 Perl_warner(aTHX_ packWARN(WARN_MISC),
4575 "Version string '%s' contains invalid data; "
4576 "ignoring: '%s'", version, s);
4584 Validates that the SV contains a valid version object.
4586 bool vverify(SV *vobj);
4588 Note that it only confirms the bare minimum structure (so as not to get
4589 confused by derived classes which may contain additional hash entries):
4593 =item * The SV contains a [reference to a] hash
4595 =item * The hash contains a "version" key
4597 =item * The "version" key has [a reference to] an AV as its value
4605 Perl_vverify(pTHX_ SV *vs)
4609 PERL_ARGS_ASSERT_VVERIFY;
4614 /* see if the appropriate elements exist */
4615 if ( SvTYPE(vs) == SVt_PVHV
4616 && hv_exists(MUTABLE_HV(vs), "version", 7)
4617 && (sv = SvRV(*hv_fetchs(MUTABLE_HV(vs), "version", FALSE)))
4618 && SvTYPE(sv) == SVt_PVAV )
4627 Accepts a version object and returns the normalized floating
4628 point representation. Call like:
4632 NOTE: you can pass either the object directly or the SV
4633 contained within the RV.
4639 Perl_vnumify(pTHX_ SV *vs)
4644 SV * const sv = newSV(0);
4647 PERL_ARGS_ASSERT_VNUMIFY;
4653 Perl_croak(aTHX_ "Invalid version object");
4655 /* see if various flags exist */
4656 if ( hv_exists(MUTABLE_HV(vs), "alpha", 5 ) )
4658 if ( hv_exists(MUTABLE_HV(vs), "width", 5 ) )
4659 width = SvIV(*hv_fetchs(MUTABLE_HV(vs), "width", FALSE));
4664 /* attempt to retrieve the version array */
4665 if ( !(av = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(vs), "version", FALSE))) ) ) {
4677 digit = SvIV(*av_fetch(av, 0, 0));
4678 Perl_sv_setpvf(aTHX_ sv, "%d.", (int)PERL_ABS(digit));
4679 for ( i = 1 ; i < len ; i++ )
4681 digit = SvIV(*av_fetch(av, i, 0));
4683 const int denom = (width == 2 ? 10 : 100);
4684 const div_t term = div((int)PERL_ABS(digit),denom);
4685 Perl_sv_catpvf(aTHX_ sv, "%0*d_%d", width, term.quot, term.rem);
4688 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4694 digit = SvIV(*av_fetch(av, len, 0));
4695 if ( alpha && width == 3 ) /* alpha version */
4697 Perl_sv_catpvf(aTHX_ sv, "%0*d", width, (int)digit);
4701 sv_catpvs(sv, "000");
4709 Accepts a version object and returns the normalized string
4710 representation. Call like:
4714 NOTE: you can pass either the object directly or the SV
4715 contained within the RV.
4721 Perl_vnormal(pTHX_ SV *vs)
4725 SV * const sv = newSV(0);
4728 PERL_ARGS_ASSERT_VNORMAL;
4734 Perl_croak(aTHX_ "Invalid version object");
4736 if ( hv_exists(MUTABLE_HV(vs), "alpha", 5 ) )
4738 av = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(vs), "version", FALSE)));
4746 digit = SvIV(*av_fetch(av, 0, 0));
4747 Perl_sv_setpvf(aTHX_ sv, "v%"IVdf, (IV)digit);
4748 for ( i = 1 ; i < len ; i++ ) {
4749 digit = SvIV(*av_fetch(av, i, 0));
4750 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4755 /* handle last digit specially */
4756 digit = SvIV(*av_fetch(av, len, 0));
4758 Perl_sv_catpvf(aTHX_ sv, "_%"IVdf, (IV)digit);
4760 Perl_sv_catpvf(aTHX_ sv, ".%"IVdf, (IV)digit);
4763 if ( len <= 2 ) { /* short version, must be at least three */
4764 for ( len = 2 - len; len != 0; len-- )
4771 =for apidoc vstringify
4773 In order to maintain maximum compatibility with earlier versions
4774 of Perl, this function will return either the floating point
4775 notation or the multiple dotted notation, depending on whether
4776 the original version contained 1 or more dots, respectively
4782 Perl_vstringify(pTHX_ SV *vs)
4784 PERL_ARGS_ASSERT_VSTRINGIFY;
4790 Perl_croak(aTHX_ "Invalid version object");
4792 if (hv_exists(MUTABLE_HV(vs), "original", sizeof("original") - 1)) {
4794 pv = *hv_fetchs(MUTABLE_HV(vs), "original", FALSE);
4798 return &PL_sv_undef;
4801 if ( hv_exists(MUTABLE_HV(vs), "qv", 2) )
4811 Version object aware cmp. Both operands must already have been
4812 converted into version objects.
4818 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
4821 bool lalpha = FALSE;
4822 bool ralpha = FALSE;
4827 PERL_ARGS_ASSERT_VCMP;
4834 if ( !vverify(lhv) )
4835 Perl_croak(aTHX_ "Invalid version object");
4837 if ( !vverify(rhv) )
4838 Perl_croak(aTHX_ "Invalid version object");
4840 /* get the left hand term */
4841 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(lhv), "version", FALSE)));
4842 if ( hv_exists(MUTABLE_HV(lhv), "alpha", 5 ) )
4845 /* and the right hand term */
4846 rav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(rhv), "version", FALSE)));
4847 if ( hv_exists(MUTABLE_HV(rhv), "alpha", 5 ) )
4855 while ( i <= m && retval == 0 )
4857 left = SvIV(*av_fetch(lav,i,0));
4858 right = SvIV(*av_fetch(rav,i,0));
4866 /* tiebreaker for alpha with identical terms */
4867 if ( retval == 0 && l == r && left == right && ( lalpha || ralpha ) )
4869 if ( lalpha && !ralpha )
4873 else if ( ralpha && !lalpha)
4879 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
4883 while ( i <= r && retval == 0 )
4885 if ( SvIV(*av_fetch(rav,i,0)) != 0 )
4886 retval = -1; /* not a match after all */
4892 while ( i <= l && retval == 0 )
4894 if ( SvIV(*av_fetch(lav,i,0)) != 0 )
4895 retval = +1; /* not a match after all */
4903 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
4904 # define EMULATE_SOCKETPAIR_UDP
4907 #ifdef EMULATE_SOCKETPAIR_UDP
4909 S_socketpair_udp (int fd[2]) {
4911 /* Fake a datagram socketpair using UDP to localhost. */
4912 int sockets[2] = {-1, -1};
4913 struct sockaddr_in addresses[2];
4915 Sock_size_t size = sizeof(struct sockaddr_in);
4916 unsigned short port;
4919 memset(&addresses, 0, sizeof(addresses));
4922 sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
4923 if (sockets[i] == -1)
4924 goto tidy_up_and_fail;
4926 addresses[i].sin_family = AF_INET;
4927 addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
4928 addresses[i].sin_port = 0; /* kernel choses port. */
4929 if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
4930 sizeof(struct sockaddr_in)) == -1)
4931 goto tidy_up_and_fail;
4934 /* Now have 2 UDP sockets. Find out which port each is connected to, and
4935 for each connect the other socket to it. */
4938 if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
4940 goto tidy_up_and_fail;
4941 if (size != sizeof(struct sockaddr_in))
4942 goto abort_tidy_up_and_fail;
4943 /* !1 is 0, !0 is 1 */
4944 if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
4945 sizeof(struct sockaddr_in)) == -1)
4946 goto tidy_up_and_fail;
4949 /* Now we have 2 sockets connected to each other. I don't trust some other
4950 process not to have already sent a packet to us (by random) so send
4951 a packet from each to the other. */
4954 /* I'm going to send my own port number. As a short.
4955 (Who knows if someone somewhere has sin_port as a bitfield and needs
4956 this routine. (I'm assuming crays have socketpair)) */
4957 port = addresses[i].sin_port;
4958 got = PerlLIO_write(sockets[i], &port, sizeof(port));
4959 if (got != sizeof(port)) {
4961 goto tidy_up_and_fail;
4962 goto abort_tidy_up_and_fail;
4966 /* Packets sent. I don't trust them to have arrived though.
4967 (As I understand it Solaris TCP stack is multithreaded. Non-blocking
4968 connect to localhost will use a second kernel thread. In 2.6 the
4969 first thread running the connect() returns before the second completes,
4970 so EINPROGRESS> In 2.7 the improved stack is faster and connect()
4971 returns 0. Poor programs have tripped up. One poor program's authors'
4972 had a 50-1 reverse stock split. Not sure how connected these were.)
4973 So I don't trust someone not to have an unpredictable UDP stack.
4977 struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
4978 int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
4982 FD_SET((unsigned int)sockets[0], &rset);
4983 FD_SET((unsigned int)sockets[1], &rset);
4985 got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
4986 if (got != 2 || !FD_ISSET(sockets[0], &rset)
4987 || !FD_ISSET(sockets[1], &rset)) {
4988 /* I hope this is portable and appropriate. */
4990 goto tidy_up_and_fail;
4991 goto abort_tidy_up_and_fail;
4995 /* And the paranoia department even now doesn't trust it to have arrive
4996 (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
4998 struct sockaddr_in readfrom;
4999 unsigned short buffer[2];
5004 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
5005 sizeof(buffer), MSG_DONTWAIT,
5006 (struct sockaddr *) &readfrom, &size);
5008 got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
5010 (struct sockaddr *) &readfrom, &size);
5014 goto tidy_up_and_fail;
5015 if (got != sizeof(port)
5016 || size != sizeof(struct sockaddr_in)
5017 /* Check other socket sent us its port. */
5018 || buffer[0] != (unsigned short) addresses[!i].sin_port
5019 /* Check kernel says we got the datagram from that socket */
5020 || readfrom.sin_family != addresses[!i].sin_family
5021 || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
5022 || readfrom.sin_port != addresses[!i].sin_port)
5023 goto abort_tidy_up_and_fail;
5026 /* My caller (my_socketpair) has validated that this is non-NULL */
5029 /* I hereby declare this connection open. May God bless all who cross
5033 abort_tidy_up_and_fail:
5034 errno = ECONNABORTED;
5038 if (sockets[0] != -1)
5039 PerlLIO_close(sockets[0]);
5040 if (sockets[1] != -1)
5041 PerlLIO_close(sockets[1]);
5046 #endif /* EMULATE_SOCKETPAIR_UDP */
5048 #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
5050 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
5051 /* Stevens says that family must be AF_LOCAL, protocol 0.
5052 I'm going to enforce that, then ignore it, and use TCP (or UDP). */
5057 struct sockaddr_in listen_addr;
5058 struct sockaddr_in connect_addr;
5063 || family != AF_UNIX
5066 errno = EAFNOSUPPORT;
5074 #ifdef EMULATE_SOCKETPAIR_UDP
5075 if (type == SOCK_DGRAM)
5076 return S_socketpair_udp(fd);
5079 listener = PerlSock_socket(AF_INET, type, 0);
5082 memset(&listen_addr, 0, sizeof(listen_addr));
5083 listen_addr.sin_family = AF_INET;
5084 listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
5085 listen_addr.sin_port = 0; /* kernel choses port. */
5086 if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
5087 sizeof(listen_addr)) == -1)
5088 goto tidy_up_and_fail;
5089 if (PerlSock_listen(listener, 1) == -1)
5090 goto tidy_up_and_fail;
5092 connector = PerlSock_socket(AF_INET, type, 0);
5093 if (connector == -1)
5094 goto tidy_up_and_fail;
5095 /* We want to find out the port number to connect to. */
5096 size = sizeof(connect_addr);
5097 if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
5099 goto tidy_up_and_fail;
5100 if (size != sizeof(connect_addr))
5101 goto abort_tidy_up_and_fail;
5102 if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
5103 sizeof(connect_addr)) == -1)
5104 goto tidy_up_and_fail;
5106 size = sizeof(listen_addr);
5107 acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
5110 goto tidy_up_and_fail;
5111 if (size != sizeof(listen_addr))
5112 goto abort_tidy_up_and_fail;
5113 PerlLIO_close(listener);
5114 /* Now check we are talking to ourself by matching port and host on the
5116 if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
5118 goto tidy_up_and_fail;
5119 if (size != sizeof(connect_addr)
5120 || listen_addr.sin_family != connect_addr.sin_family
5121 || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
5122 || listen_addr.sin_port != connect_addr.sin_port) {
5123 goto abort_tidy_up_and_fail;
5129 abort_tidy_up_and_fail:
5131 errno = ECONNABORTED; /* This would be the standard thing to do. */
5133 # ifdef ECONNREFUSED
5134 errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */
5136 errno = ETIMEDOUT; /* Desperation time. */
5143 PerlLIO_close(listener);
5144 if (connector != -1)
5145 PerlLIO_close(connector);
5147 PerlLIO_close(acceptor);
5153 /* In any case have a stub so that there's code corresponding
5154 * to the my_socketpair in global.sym. */
5156 Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
5157 #ifdef HAS_SOCKETPAIR
5158 return socketpair(family, type, protocol, fd);
5167 =for apidoc sv_nosharing
5169 Dummy routine which "shares" an SV when there is no sharing module present.
5170 Or "locks" it. Or "unlocks" it. In other words, ignores its single SV argument.
5171 Exists to avoid test for a NULL function pointer and because it could
5172 potentially warn under some level of strict-ness.
5178 Perl_sv_nosharing(pTHX_ SV *sv)
5180 PERL_UNUSED_CONTEXT;
5181 PERL_UNUSED_ARG(sv);
5186 =for apidoc sv_destroyable
5188 Dummy routine which reports that object can be destroyed when there is no
5189 sharing module present. It ignores its single SV argument, and returns
5190 'true'. Exists to avoid test for a NULL function pointer and because it
5191 could potentially warn under some level of strict-ness.
5197 Perl_sv_destroyable(pTHX_ SV *sv)
5199 PERL_UNUSED_CONTEXT;
5200 PERL_UNUSED_ARG(sv);
5205 Perl_parse_unicode_opts(pTHX_ const char **popt)
5207 const char *p = *popt;
5210 PERL_ARGS_ASSERT_PARSE_UNICODE_OPTS;
5214 opt = (U32) atoi(p);
5217 if (*p && *p != '\n' && *p != '\r')
5218 Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
5223 case PERL_UNICODE_STDIN:
5224 opt |= PERL_UNICODE_STDIN_FLAG; break;
5225 case PERL_UNICODE_STDOUT:
5226 opt |= PERL_UNICODE_STDOUT_FLAG; break;
5227 case PERL_UNICODE_STDERR:
5228 opt |= PERL_UNICODE_STDERR_FLAG; break;
5229 case PERL_UNICODE_STD:
5230 opt |= PERL_UNICODE_STD_FLAG; break;
5231 case PERL_UNICODE_IN:
5232 opt |= PERL_UNICODE_IN_FLAG; break;
5233 case PERL_UNICODE_OUT:
5234 opt |= PERL_UNICODE_OUT_FLAG; break;
5235 case PERL_UNICODE_INOUT:
5236 opt |= PERL_UNICODE_INOUT_FLAG; break;
5237 case PERL_UNICODE_LOCALE:
5238 opt |= PERL_UNICODE_LOCALE_FLAG; break;
5239 case PERL_UNICODE_ARGV:
5240 opt |= PERL_UNICODE_ARGV_FLAG; break;
5241 case PERL_UNICODE_UTF8CACHEASSERT:
5242 opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break;
5244 if (*p != '\n' && *p != '\r')
5246 "Unknown Unicode option letter '%c'", *p);
5252 opt = PERL_UNICODE_DEFAULT_FLAGS;
5254 if (opt & ~PERL_UNICODE_ALL_FLAGS)
5255 Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
5256 (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
5268 * This is really just a quick hack which grabs various garbage
5269 * values. It really should be a real hash algorithm which
5270 * spreads the effect of every input bit onto every output bit,
5271 * if someone who knows about such things would bother to write it.
5272 * Might be a good idea to add that function to CORE as well.
5273 * No numbers below come from careful analysis or anything here,
5274 * except they are primes and SEED_C1 > 1E6 to get a full-width
5275 * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
5276 * probably be bigger too.
5279 # define SEED_C1 1000003
5280 #define SEED_C4 73819
5282 # define SEED_C1 25747
5283 #define SEED_C4 20639
5287 #define SEED_C5 26107
5289 #ifndef PERL_NO_DEV_RANDOM
5294 # include <starlet.h>
5295 /* when[] = (low 32 bits, high 32 bits) of time since epoch
5296 * in 100-ns units, typically incremented ever 10 ms. */
5297 unsigned int when[2];
5299 # ifdef HAS_GETTIMEOFDAY
5300 struct timeval when;
5306 /* This test is an escape hatch, this symbol isn't set by Configure. */
5307 #ifndef PERL_NO_DEV_RANDOM
5308 #ifndef PERL_RANDOM_DEVICE
5309 /* /dev/random isn't used by default because reads from it will block
5310 * if there isn't enough entropy available. You can compile with
5311 * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
5312 * is enough real entropy to fill the seed. */
5313 # define PERL_RANDOM_DEVICE "/dev/urandom"
5315 fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
5317 if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u)
5326 _ckvmssts(sys$gettim(when));
5327 u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
5329 # ifdef HAS_GETTIMEOFDAY
5330 PerlProc_gettimeofday(&when,NULL);
5331 u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
5334 u = (U32)SEED_C1 * when;
5337 u += SEED_C3 * (U32)PerlProc_getpid();
5338 u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
5339 #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
5340 u += SEED_C5 * (U32)PTR2UV(&when);
5346 Perl_get_hash_seed(pTHX)
5349 const char *s = PerlEnv_getenv("PERL_HASH_SEED");
5355 if (s && isDIGIT(*s))
5356 myseed = (UV)Atoul(s);
5358 #ifdef USE_HASH_SEED_EXPLICIT
5362 /* Compute a random seed */
5363 (void)seedDrand01((Rand_seed_t)seed());
5364 myseed = (UV)(Drand01() * (NV)UV_MAX);
5365 #if RANDBITS < (UVSIZE * 8)
5366 /* Since there are not enough randbits to to reach all
5367 * the bits of a UV, the low bits might need extra
5368 * help. Sum in another random number that will
5369 * fill in the low bits. */
5371 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
5372 #endif /* RANDBITS < (UVSIZE * 8) */
5373 if (myseed == 0) { /* Superparanoia. */
5374 myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
5376 Perl_croak(aTHX_ "Your random numbers are not that random");
5379 PL_rehash_seed_set = TRUE;
5386 Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
5388 const char * const stashpv = CopSTASHPV(c);
5389 const char * const name = HvNAME_get(hv);
5390 PERL_UNUSED_CONTEXT;
5391 PERL_ARGS_ASSERT_STASHPV_HVNAME_MATCH;
5393 if (stashpv == name)
5395 if (stashpv && name)
5396 if (strEQ(stashpv, name))
5403 #ifdef PERL_GLOBAL_STRUCT
5405 #define PERL_GLOBAL_STRUCT_INIT
5406 #include "opcode.h" /* the ppaddr and check */
5409 Perl_init_global_struct(pTHX)
5411 struct perl_vars *plvarsp = NULL;
5412 # ifdef PERL_GLOBAL_STRUCT
5413 const IV nppaddr = sizeof(Gppaddr)/sizeof(Perl_ppaddr_t);
5414 const IV ncheck = sizeof(Gcheck) /sizeof(Perl_check_t);
5415 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5416 /* PerlMem_malloc() because can't use even safesysmalloc() this early. */
5417 plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars));
5421 plvarsp = PL_VarsPtr;
5422 # endif /* PERL_GLOBAL_STRUCT_PRIVATE */
5428 # define PERLVAR(var,type) /**/
5429 # define PERLVARA(var,n,type) /**/
5430 # define PERLVARI(var,type,init) plvarsp->var = init;
5431 # define PERLVARIC(var,type,init) plvarsp->var = init;
5432 # define PERLVARISC(var,init) Copy(init, plvarsp->var, sizeof(init), char);
5433 # include "perlvars.h"
5439 # ifdef PERL_GLOBAL_STRUCT
5442 PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t));
5443 if (!plvarsp->Gppaddr)
5447 PerlMem_malloc(ncheck * sizeof(Perl_check_t));
5448 if (!plvarsp->Gcheck)
5450 Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t);
5451 Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t);
5453 # ifdef PERL_SET_VARS
5454 PERL_SET_VARS(plvarsp);
5456 # undef PERL_GLOBAL_STRUCT_INIT
5461 #endif /* PERL_GLOBAL_STRUCT */
5463 #ifdef PERL_GLOBAL_STRUCT
5466 Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
5468 PERL_ARGS_ASSERT_FREE_GLOBAL_STRUCT;
5469 # ifdef PERL_GLOBAL_STRUCT
5470 # ifdef PERL_UNSET_VARS
5471 PERL_UNSET_VARS(plvarsp);
5473 free(plvarsp->Gppaddr);
5474 free(plvarsp->Gcheck);
5475 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
5481 #endif /* PERL_GLOBAL_STRUCT */
5485 /* -DPERL_MEM_LOG: the Perl_mem_log_..() is compiled, including the
5486 * the default implementation, unless -DPERL_MEM_LOG_NOIMPL is also
5487 * given, and you supply your own implementation.
5489 * The default implementation reads a single env var, PERL_MEM_LOG,
5490 * expecting one or more of the following:
5492 * \d+ - fd fd to write to : must be 1st (atoi)
5493 * 'm' - memlog was PERL_MEM_LOG=1
5494 * 's' - svlog was PERL_SV_LOG=1
5495 * 't' - timestamp was PERL_MEM_LOG_TIMESTAMP=1
5497 * This makes the logger controllable enough that it can reasonably be
5498 * added to the system perl.
5501 /* -DPERL_MEM_LOG_SPRINTF_BUF_SIZE=X: size of a (stack-allocated) buffer
5502 * the Perl_mem_log_...() will use (either via sprintf or snprintf).
5504 #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128
5506 /* -DPERL_MEM_LOG_FD=N: the file descriptor the Perl_mem_log_...()
5507 * writes to. In the default logger, this is settable at runtime.
5509 #ifndef PERL_MEM_LOG_FD
5510 # define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */
5513 #ifndef PERL_MEM_LOG_NOIMPL
5515 # ifdef DEBUG_LEAKING_SCALARS
5516 # define SV_LOG_SERIAL_FMT " [%lu]"
5517 # define _SV_LOG_SERIAL_ARG(sv) , (unsigned long) (sv)->sv_debug_serial
5519 # define SV_LOG_SERIAL_FMT
5520 # define _SV_LOG_SERIAL_ARG(sv)
5524 S_mem_log_common(enum mem_log_type mlt, const UV n,
5525 const UV typesize, const char *type_name, const SV *sv,
5526 Malloc_t oldalloc, Malloc_t newalloc,
5527 const char *filename, const int linenumber,
5528 const char *funcname)
5532 PERL_ARGS_ASSERT_MEM_LOG_COMMON;
5534 pmlenv = PerlEnv_getenv("PERL_MEM_LOG");
5537 if (mlt < MLT_NEW_SV ? strchr(pmlenv,'m') : strchr(pmlenv,'s'))
5539 /* We can't use SVs or PerlIO for obvious reasons,
5540 * so we'll use stdio and low-level IO instead. */
5541 char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE];
5543 # ifdef HAS_GETTIMEOFDAY
5544 # define MEM_LOG_TIME_FMT "%10d.%06d: "
5545 # define MEM_LOG_TIME_ARG (int)tv.tv_sec, (int)tv.tv_usec
5547 gettimeofday(&tv, 0);
5549 # define MEM_LOG_TIME_FMT "%10d: "
5550 # define MEM_LOG_TIME_ARG (int)when
5554 /* If there are other OS specific ways of hires time than
5555 * gettimeofday() (see ext/Time-HiRes), the easiest way is
5556 * probably that they would be used to fill in the struct
5560 int fd = atoi(pmlenv);
5562 fd = PERL_MEM_LOG_FD;
5564 if (strchr(pmlenv, 't')) {
5565 len = my_snprintf(buf, sizeof(buf),
5566 MEM_LOG_TIME_FMT, MEM_LOG_TIME_ARG);
5567 PerlLIO_write(fd, buf, len);
5571 len = my_snprintf(buf, sizeof(buf),
5572 "alloc: %s:%d:%s: %"IVdf" %"UVuf
5573 " %s = %"IVdf": %"UVxf"\n",
5574 filename, linenumber, funcname, n, typesize,
5575 type_name, n * typesize, PTR2UV(newalloc));
5578 len = my_snprintf(buf, sizeof(buf),
5579 "realloc: %s:%d:%s: %"IVdf" %"UVuf
5580 " %s = %"IVdf": %"UVxf" -> %"UVxf"\n",
5581 filename, linenumber, funcname, n, typesize,
5582 type_name, n * typesize, PTR2UV(oldalloc),
5586 len = my_snprintf(buf, sizeof(buf),
5587 "free: %s:%d:%s: %"UVxf"\n",
5588 filename, linenumber, funcname,
5593 len = my_snprintf(buf, sizeof(buf),
5594 "%s_SV: %s:%d:%s: %"UVxf SV_LOG_SERIAL_FMT "\n",
5595 mlt == MLT_NEW_SV ? "new" : "del",
5596 filename, linenumber, funcname,
5597 PTR2UV(sv) _SV_LOG_SERIAL_ARG(sv));
5602 PerlLIO_write(fd, buf, len);
5606 #endif /* !PERL_MEM_LOG_NOIMPL */
5608 #ifndef PERL_MEM_LOG_NOIMPL
5610 mem_log_common_if(alty, num, tysz, tynm, sv, oal, nal, flnm, ln, fnnm) \
5611 mem_log_common (alty, num, tysz, tynm, sv, oal, nal, flnm, ln, fnnm)
5613 /* this is suboptimal, but bug compatible. User is providing their
5614 own implemenation, but is getting these functions anyway, and they
5615 do nothing. But _NOIMPL users should be able to cope or fix */
5617 mem_log_common_if(alty, num, tysz, tynm, u, oal, nal, flnm, ln, fnnm) \
5618 /* mem_log_common_if_PERL_MEM_LOG_NOIMPL */
5622 Perl_mem_log_alloc(const UV n, const UV typesize, const char *type_name,
5624 const char *filename, const int linenumber,
5625 const char *funcname)
5627 mem_log_common_if(MLT_ALLOC, n, typesize, type_name,
5628 NULL, NULL, newalloc,
5629 filename, linenumber, funcname);
5634 Perl_mem_log_realloc(const UV n, const UV typesize, const char *type_name,
5635 Malloc_t oldalloc, Malloc_t newalloc,
5636 const char *filename, const int linenumber,
5637 const char *funcname)
5639 mem_log_common_if(MLT_REALLOC, n, typesize, type_name,
5640 NULL, oldalloc, newalloc,
5641 filename, linenumber, funcname);
5646 Perl_mem_log_free(Malloc_t oldalloc,
5647 const char *filename, const int linenumber,
5648 const char *funcname)
5650 mem_log_common_if(MLT_FREE, 0, 0, "", NULL, oldalloc, NULL,
5651 filename, linenumber, funcname);
5656 Perl_mem_log_new_sv(const SV *sv,
5657 const char *filename, const int linenumber,
5658 const char *funcname)
5660 mem_log_common_if(MLT_NEW_SV, 0, 0, "", sv, NULL, NULL,
5661 filename, linenumber, funcname);
5665 Perl_mem_log_del_sv(const SV *sv,
5666 const char *filename, const int linenumber,
5667 const char *funcname)
5669 mem_log_common_if(MLT_DEL_SV, 0, 0, "", sv, NULL, NULL,
5670 filename, linenumber, funcname);
5673 #endif /* PERL_MEM_LOG */
5676 =for apidoc my_sprintf
5678 The C library C<sprintf>, wrapped if necessary, to ensure that it will return
5679 the length of the string written to the buffer. Only rare pre-ANSI systems
5680 need the wrapper function - usually this is a direct call to C<sprintf>.
5684 #ifndef SPRINTF_RETURNS_STRLEN
5686 Perl_my_sprintf(char *buffer, const char* pat, ...)
5689 PERL_ARGS_ASSERT_MY_SPRINTF;
5690 va_start(args, pat);
5691 vsprintf(buffer, pat, args);
5693 return strlen(buffer);
5698 =for apidoc my_snprintf
5700 The C library C<snprintf> functionality, if available and
5701 standards-compliant (uses C<vsnprintf>, actually). However, if the
5702 C<vsnprintf> is not available, will unfortunately use the unsafe
5703 C<vsprintf> which can overrun the buffer (there is an overrun check,
5704 but that may be too late). Consider using C<sv_vcatpvf> instead, or
5705 getting C<vsnprintf>.
5710 Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
5715 PERL_ARGS_ASSERT_MY_SNPRINTF;
5716 va_start(ap, format);
5717 #ifdef HAS_VSNPRINTF
5718 retval = vsnprintf(buffer, len, format, ap);
5720 retval = vsprintf(buffer, format, ap);
5723 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5724 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5725 Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
5730 =for apidoc my_vsnprintf
5732 The C library C<vsnprintf> if available and standards-compliant.
5733 However, if if the C<vsnprintf> is not available, will unfortunately
5734 use the unsafe C<vsprintf> which can overrun the buffer (there is an
5735 overrun check, but that may be too late). Consider using
5736 C<sv_vcatpvf> instead, or getting C<vsnprintf>.
5741 Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap)
5748 PERL_ARGS_ASSERT_MY_VSNPRINTF;
5750 Perl_va_copy(ap, apc);
5751 # ifdef HAS_VSNPRINTF
5752 retval = vsnprintf(buffer, len, format, apc);
5754 retval = vsprintf(buffer, format, apc);
5757 # ifdef HAS_VSNPRINTF
5758 retval = vsnprintf(buffer, len, format, ap);
5760 retval = vsprintf(buffer, format, ap);
5762 #endif /* #ifdef NEED_VA_COPY */
5763 /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
5764 if (retval < 0 || (len > 0 && (Size_t)retval >= len))
5765 Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
5770 Perl_my_clearenv(pTHX)
5773 #if ! defined(PERL_MICRO)
5774 # if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
5776 # else /* ! (PERL_IMPLICIT_SYS || WIN32) */
5777 # if defined(USE_ENVIRON_ARRAY)
5778 # if defined(USE_ITHREADS)
5779 /* only the parent thread can clobber the process environment */
5780 if (PL_curinterp == aTHX)
5781 # endif /* USE_ITHREADS */
5783 # if ! defined(PERL_USE_SAFE_PUTENV)
5784 if ( !PL_use_safe_putenv) {
5786 if (environ == PL_origenviron)
5787 environ = (char**)safesysmalloc(sizeof(char*));
5789 for (i = 0; environ[i]; i++)
5790 (void)safesysfree(environ[i]);
5793 # else /* PERL_USE_SAFE_PUTENV */
5794 # if defined(HAS_CLEARENV)
5796 # elif defined(HAS_UNSETENV)
5797 int bsiz = 80; /* Most envvar names will be shorter than this. */
5798 int bufsiz = bsiz * sizeof(char); /* sizeof(char) paranoid? */
5799 char *buf = (char*)safesysmalloc(bufsiz);
5800 while (*environ != NULL) {
5801 char *e = strchr(*environ, '=');
5802 int l = e ? e - *environ : (int)strlen(*environ);
5804 (void)safesysfree(buf);
5805 bsiz = l + 1; /* + 1 for the \0. */
5806 buf = (char*)safesysmalloc(bufsiz);
5808 memcpy(buf, *environ, l);
5810 (void)unsetenv(buf);
5812 (void)safesysfree(buf);
5813 # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */
5814 /* Just null environ and accept the leakage. */
5816 # endif /* HAS_CLEARENV || HAS_UNSETENV */
5817 # endif /* ! PERL_USE_SAFE_PUTENV */
5819 # endif /* USE_ENVIRON_ARRAY */
5820 # endif /* PERL_IMPLICIT_SYS || WIN32 */
5821 #endif /* PERL_MICRO */
5824 #ifdef PERL_IMPLICIT_CONTEXT
5826 /* Implements the MY_CXT_INIT macro. The first time a module is loaded,
5827 the global PL_my_cxt_index is incremented, and that value is assigned to
5828 that module's static my_cxt_index (who's address is passed as an arg).
5829 Then, for each interpreter this function is called for, it makes sure a
5830 void* slot is available to hang the static data off, by allocating or
5831 extending the interpreter's PL_my_cxt_list array */
5833 #ifndef PERL_GLOBAL_STRUCT_PRIVATE
5835 Perl_my_cxt_init(pTHX_ int *index, size_t size)
5839 PERL_ARGS_ASSERT_MY_CXT_INIT;
5841 /* this module hasn't been allocated an index yet */
5842 MUTEX_LOCK(&PL_my_ctx_mutex);
5843 *index = PL_my_cxt_index++;
5844 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5847 /* make sure the array is big enough */
5848 if (PL_my_cxt_size <= *index) {
5849 if (PL_my_cxt_size) {
5850 while (PL_my_cxt_size <= *index)
5851 PL_my_cxt_size *= 2;
5852 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5855 PL_my_cxt_size = 16;
5856 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5859 /* newSV() allocates one more than needed */
5860 p = (void*)SvPVX(newSV(size-1));
5861 PL_my_cxt_list[*index] = p;
5862 Zero(p, size, char);
5866 #else /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5869 Perl_my_cxt_index(pTHX_ const char *my_cxt_key)
5874 PERL_ARGS_ASSERT_MY_CXT_INDEX;
5876 for (index = 0; index < PL_my_cxt_index; index++) {
5877 const char *key = PL_my_cxt_keys[index];
5878 /* try direct pointer compare first - there are chances to success,
5879 * and it's much faster.
5881 if ((key == my_cxt_key) || strEQ(key, my_cxt_key))
5888 Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size)
5894 PERL_ARGS_ASSERT_MY_CXT_INIT;
5896 index = Perl_my_cxt_index(aTHX_ my_cxt_key);
5898 /* this module hasn't been allocated an index yet */
5899 MUTEX_LOCK(&PL_my_ctx_mutex);
5900 index = PL_my_cxt_index++;
5901 MUTEX_UNLOCK(&PL_my_ctx_mutex);
5904 /* make sure the array is big enough */
5905 if (PL_my_cxt_size <= index) {
5906 int old_size = PL_my_cxt_size;
5908 if (PL_my_cxt_size) {
5909 while (PL_my_cxt_size <= index)
5910 PL_my_cxt_size *= 2;
5911 Renew(PL_my_cxt_list, PL_my_cxt_size, void *);
5912 Renew(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5915 PL_my_cxt_size = 16;
5916 Newx(PL_my_cxt_list, PL_my_cxt_size, void *);
5917 Newx(PL_my_cxt_keys, PL_my_cxt_size, const char *);
5919 for (i = old_size; i < PL_my_cxt_size; i++) {
5920 PL_my_cxt_keys[i] = 0;
5921 PL_my_cxt_list[i] = 0;
5924 PL_my_cxt_keys[index] = my_cxt_key;
5925 /* newSV() allocates one more than needed */
5926 p = (void*)SvPVX(newSV(size-1));
5927 PL_my_cxt_list[index] = p;
5928 Zero(p, size, char);
5931 #endif /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */
5932 #endif /* PERL_IMPLICIT_CONTEXT */
5936 Perl_my_strlcat(char *dst, const char *src, Size_t size)
5938 Size_t used, length, copy;
5941 length = strlen(src);
5942 if (size > 0 && used < size - 1) {
5943 copy = (length >= size - used) ? size - used - 1 : length;
5944 memcpy(dst + used, src, copy);
5945 dst[used + copy] = '\0';
5947 return used + length;
5953 Perl_my_strlcpy(char *dst, const char *src, Size_t size)
5955 Size_t length, copy;
5957 length = strlen(src);
5959 copy = (length >= size) ? size - 1 : length;
5960 memcpy(dst, src, copy);
5967 #if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_MSC_VER < 1400) && (WINVER < 0x0500)
5968 /* VC7 or 7.1, building with pre-VC7 runtime libraries. */
5969 long _ftol( double ); /* Defined by VC6 C libs. */
5970 long _ftol2( double dblSource ) { return _ftol( dblSource ); }
5974 Perl_get_db_sub(pTHX_ SV **svp, CV *cv)
5977 SV * const dbsv = GvSVn(PL_DBsub);
5978 /* We do not care about using sv to call CV;
5979 * it's for informational purposes only.
5982 PERL_ARGS_ASSERT_GET_DB_SUB;
5985 if (!PERLDB_SUB_NN) {
5986 GV * const gv = CvGV(cv);
5988 if ( svp && ((CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
5989 || strEQ(GvNAME(gv), "END")
5990 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
5991 !( (SvTYPE(*svp) == SVt_PVGV)
5992 && (GvCV((const GV *)*svp) == cv) )))) {
5993 /* Use GV from the stack as a fallback. */
5994 /* GV is potentially non-unique, or contain different CV. */
5995 SV * const tmp = newRV(MUTABLE_SV(cv));
5996 sv_setsv(dbsv, tmp);
6000 gv_efullname3(dbsv, gv, NULL);
6004 const int type = SvTYPE(dbsv);
6005 if (type < SVt_PVIV && type != SVt_IV)
6006 sv_upgrade(dbsv, SVt_PVIV);
6007 (void)SvIOK_on(dbsv);
6008 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
6013 Perl_my_dirfd(pTHX_ DIR * dir) {
6015 /* Most dirfd implementations have problems when passed NULL. */
6020 #elif defined(HAS_DIR_DD_FD)
6023 Perl_die(aTHX_ PL_no_func, "dirfd");
6030 Perl_get_re_arg(pTHX_ SV *sv) {
6037 (tmpsv = MUTABLE_SV(SvRV(sv))) && /* assign deliberate */
6038 SvTYPE(tmpsv) == SVt_REGEXP)
6040 return (REGEXP*) tmpsv;
6049 * c-indentation-style: bsd
6051 * indent-tabs-mode: t
6054 * ex: set ts=8 sts=4 sw=4 noet: