2 * perlio.c Copyright (c) 1996-2005, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
12 /* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
20 * at the dispatch tables, even when we do not need it for other reasons.
21 * Invent a dSYS macro to abstract this out
23 #ifdef PERL_IMPLICIT_SYS
36 #define PERLIO_NOT_STDIO 0
37 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
43 * This file provides those parts of PerlIO abstraction
44 * which are not #defined in perlio.h.
45 * Which these are depends on various Configure #ifdef's
49 #define PERL_IN_PERLIO_C
52 #ifdef PERL_IMPLICIT_CONTEXT
59 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
62 /* Missing proto on LynxOS */
66 /* Call the callback or PerlIOBase, and return failure. */
67 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
68 if (PerlIOValid(f)) { \
69 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
73 return PerlIOBase_ ## base args; \
76 SETERRNO(EBADF, SS_IVCHAN); \
79 /* Call the callback or fail, and return failure. */
80 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
81 if (PerlIOValid(f)) { \
82 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
83 if (tab && tab->callback) \
84 return (*tab->callback) args; \
85 SETERRNO(EINVAL, LIB_INVARG); \
88 SETERRNO(EBADF, SS_IVCHAN); \
91 /* Call the callback or PerlIOBase, and be void. */
92 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
93 if (PerlIOValid(f)) { \
94 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
95 if (tab && tab->callback) \
96 (*tab->callback) args; \
98 PerlIOBase_ ## base args; \
101 SETERRNO(EBADF, SS_IVCHAN)
103 /* Call the callback or fail, and be void. */
104 #define Perl_PerlIO_or_fail_void(f, callback, args) \
105 if (PerlIOValid(f)) { \
106 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
107 if (tab && tab->callback) \
108 (*tab->callback) args; \
110 SETERRNO(EINVAL, LIB_INVARG); \
113 SETERRNO(EBADF, SS_IVCHAN)
117 perlsio_binmode(FILE *fp, int iotype, int mode)
120 * This used to be contents of do_binmode in doio.c
123 # if defined(atarist) || defined(__MINT__)
126 ((FILE *) fp)->_flag |= _IOBIN;
128 ((FILE *) fp)->_flag &= ~_IOBIN;
135 if (PerlLIO_setmode(fp, mode) != -1) {
137 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
139 # if defined(WIN32) && defined(__BORLANDC__)
141 * The translation mode of the stream is maintained independent
143 * the translation mode of the fd in the Borland RTL (heavy
144 * digging through their runtime sources reveal). User has to
146 * the mode explicitly for the stream (though they don't
148 * this anywhere). GSAR 97-5-24
154 fp->flags &= ~_F_BIN;
162 # if defined(USEMYBINMODE)
164 if (my_binmode(fp, iotype, mode) != FALSE)
170 PERL_UNUSED_ARG(iotype);
171 PERL_UNUSED_ARG(mode);
179 #define O_ACCMODE 3 /* Assume traditional implementation */
183 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
185 const int result = rawmode & O_ACCMODE;
190 ptype = IoTYPE_RDONLY;
193 ptype = IoTYPE_WRONLY;
201 *writing = (result != O_RDONLY);
203 if (result == O_RDONLY) {
207 else if (rawmode & O_APPEND) {
209 if (result != O_WRONLY)
214 if (result == O_WRONLY)
221 if (rawmode & O_BINARY)
227 #ifndef PERLIO_LAYERS
229 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
231 if (!names || !*names
232 || strEQ(names, ":crlf")
233 || strEQ(names, ":raw")
234 || strEQ(names, ":bytes")
238 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
246 PerlIO_destruct(pTHX)
251 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
254 PERL_UNUSED_ARG(iotype);
255 PERL_UNUSED_ARG(mode);
256 PERL_UNUSED_ARG(names);
259 return perlsio_binmode(fp, iotype, mode);
264 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
266 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
269 #ifdef PERL_IMPLICIT_SYS
270 return PerlSIO_fdupopen(f);
273 return win32_fdupopen(f);
276 const int fd = PerlLIO_dup(PerlIO_fileno(f));
279 int omode = fcntl(fd, F_GETFL);
281 omode = djgpp_get_stream_mode(f);
283 PerlIO_intmode2str(omode,mode,NULL);
284 /* the r+ is a hack */
285 return PerlIO_fdopen(fd, mode);
290 SETERRNO(EBADF, SS_IVCHAN);
300 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
304 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
305 int imode, int perm, PerlIO *old, int narg, SV **args)
309 Perl_croak(aTHX_ "More than one argument to open");
311 if (*args == &PL_sv_undef)
312 return PerlIO_tmpfile();
314 const char *name = SvPV_nolen_const(*args);
315 if (*mode == IoTYPE_NUMERIC) {
316 fd = PerlLIO_open3(name, imode, perm);
318 return PerlIO_fdopen(fd, mode + 1);
321 return PerlIO_reopen(name, mode, old);
324 return PerlIO_open(name, mode);
329 return PerlIO_fdopen(fd, (char *) mode);
334 XS(XS_PerlIO__Layer__find)
338 Perl_croak(aTHX_ "Usage class->find(name[,load])");
340 const char *name = SvPV_nolen_const(ST(1));
341 ST(0) = (strEQ(name, "crlf")
342 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
349 Perl_boot_core_PerlIO(pTHX)
351 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
357 #ifdef PERLIO_IS_STDIO
363 * Does nothing (yet) except force this file to be included in perl
364 * binary. That allows this file to force inclusion of other functions
365 * that may be required by loadable extensions e.g. for
366 * FileHandle::tmpfile
370 #undef PerlIO_tmpfile
377 #else /* PERLIO_IS_STDIO */
385 * This section is just to make sure these functions get pulled in from
389 #undef PerlIO_tmpfile
400 * Force this file to be included in perl binary. Which allows this
401 * file to force inclusion of other functions that may be required by
402 * loadable extensions e.g. for FileHandle::tmpfile
406 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
407 * results in a lot of lseek()s to regular files and lot of small
410 sfset(sfstdout, SF_SHARE, 0);
413 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
415 PerlIO_importFILE(FILE *stdio, const char *mode)
417 const int fd = fileno(stdio);
418 if (!mode || !*mode) {
421 return PerlIO_fdopen(fd, mode);
425 PerlIO_findFILE(PerlIO *pio)
427 const int fd = PerlIO_fileno(pio);
428 FILE * const f = fdopen(fd, "r+");
430 if (!f && errno == EINVAL)
432 if (!f && errno == EINVAL)
439 /*======================================================================================*/
441 * Implement all the PerlIO interface ourselves.
447 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
454 #include <sys/mman.h>
458 PerlIO_debug(const char *fmt, ...)
463 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
464 const char *s = PerlEnv_getenv("PERLIO_DEBUG");
466 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
468 PL_perlio_debug_fd = -1;
470 if (PL_perlio_debug_fd > 0) {
473 const char *s = CopFILE(PL_curcop);
475 /* Use fixed buffer as sv_catpvf etc. needs SVs */
479 len = my_sprintf(buffer, "%.40s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
480 vsprintf(buffer+len, fmt, ap);
481 PerlLIO_write(PL_perlio_debug_fd, buffer, strlen(buffer));
483 SV * const sv = newSVpvn("", 0);
486 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
487 (IV) CopLINE(PL_curcop));
488 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
490 s = SvPV_const(sv, len);
491 PerlLIO_write(PL_perlio_debug_fd, s, len);
498 /*--------------------------------------------------------------------------------------*/
501 * Inner level routines
505 * Table of pointers to the PerlIO structs (malloc'ed)
507 #define PERLIO_TABLE_SIZE 64
510 PerlIO_allocate(pTHX)
513 * Find a free slot in the table, allocating new table as necessary
518 while ((f = *last)) {
520 last = (PerlIO **) (f);
521 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
527 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
535 #undef PerlIO_fdupopen
537 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
539 if (PerlIOValid(f)) {
540 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
541 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
543 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
545 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
549 SETERRNO(EBADF, SS_IVCHAN);
555 PerlIO_cleantable(pTHX_ PerlIO **tablep)
557 PerlIO *table = *tablep;
560 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
561 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
562 PerlIO *f = table + i;
574 PerlIO_list_alloc(pTHX)
577 Newxz(list, 1, PerlIO_list_t);
583 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
586 if (--list->refcnt == 0) {
589 for (i = 0; i < list->cur; i++) {
590 if (list->array[i].arg)
591 SvREFCNT_dec(list->array[i].arg);
593 Safefree(list->array);
601 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
604 if (list->cur >= list->len) {
607 Renew(list->array, list->len, PerlIO_pair_t);
609 Newx(list->array, list->len, PerlIO_pair_t);
611 p = &(list->array[list->cur++]);
613 if ((p->arg = arg)) {
614 (void)SvREFCNT_inc(arg);
619 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
621 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
624 list = PerlIO_list_alloc(aTHX);
625 for (i=0; i < proto->cur; i++) {
627 if (proto->array[i].arg)
628 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
629 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
636 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
639 PerlIO **table = &proto->Iperlio;
642 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
643 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
644 PerlIO_allocate(aTHX); /* root slot is never used */
645 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
646 while ((f = *table)) {
648 table = (PerlIO **) (f++);
649 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
651 (void) fp_dup(f, 0, param);
657 PERL_UNUSED_ARG(proto);
658 PERL_UNUSED_ARG(param);
663 PerlIO_destruct(pTHX)
665 PerlIO **table = &PL_perlio;
668 PerlIO_debug("Destruct %p\n",aTHX);
670 while ((f = *table)) {
672 table = (PerlIO **) (f++);
673 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
677 if (l->tab->kind & PERLIO_K_DESTRUCT) {
678 PerlIO_debug("Destruct popping %s\n", l->tab->name);
692 PerlIO_pop(pTHX_ PerlIO *f)
696 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
697 if (l->tab->Popped) {
699 * If popped returns non-zero do not free its layer structure
700 * it has either done so itself, or it is shared and still in
703 if ((*l->tab->Popped) (aTHX_ f) != 0)
711 /* Return as an array the stack of layers on a filehandle. Note that
712 * the stack is returned top-first in the array, and there are three
713 * times as many array elements as there are layers in the stack: the
714 * first element of a layer triplet is the name, the second one is the
715 * arguments, and the third one is the flags. */
718 PerlIO_get_layers(pTHX_ PerlIO *f)
722 if (PerlIOValid(f)) {
723 PerlIOl *l = PerlIOBase(f);
726 SV *name = l->tab && l->tab->name ?
727 newSVpv(l->tab->name, 0) : &PL_sv_undef;
728 SV *arg = l->tab && l->tab->Getarg ?
729 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
732 av_push(av, newSViv((IV)l->flags));
740 /*--------------------------------------------------------------------------------------*/
742 * XS Interface for perl code
746 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
750 if ((SSize_t) len <= 0)
752 for (i = 0; i < PL_known_layers->cur; i++) {
753 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
754 if (memEQ(f->name, name, len) && f->name[len] == 0) {
755 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
759 if (load && PL_subname && PL_def_layerlist
760 && PL_def_layerlist->cur >= 2) {
761 if (PL_in_load_module) {
762 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
765 SV * const pkgsv = newSVpvn("PerlIO", 6);
766 SV * const layer = newSVpvn(name, len);
767 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
769 SAVEINT(PL_in_load_module);
771 SAVEGENERICSV(PL_warnhook);
772 (void)SvREFCNT_inc(cv);
773 PL_warnhook = (SV *) cv;
777 * The two SVs are magically freed by load_module
779 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
782 return PerlIO_find_layer(aTHX_ name, len, 0);
785 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
789 #ifdef USE_ATTRIBUTES_FOR_PERLIO
792 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
795 IO *io = GvIOn((GV *) SvRV(sv));
796 PerlIO *ifp = IoIFP(io);
797 PerlIO *ofp = IoOFP(io);
798 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
804 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
807 IO *io = GvIOn((GV *) SvRV(sv));
808 PerlIO *ifp = IoIFP(io);
809 PerlIO *ofp = IoOFP(io);
810 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
816 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
818 Perl_warn(aTHX_ "clear %" SVf, sv);
823 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
825 Perl_warn(aTHX_ "free %" SVf, sv);
829 MGVTBL perlio_vtab = {
837 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
840 SV *sv = SvRV(ST(1));
845 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
847 mg = mg_find(sv, PERL_MAGIC_ext);
848 mg->mg_virtual = &perlio_vtab;
850 Perl_warn(aTHX_ "attrib %" SVf, sv);
851 for (i = 2; i < items; i++) {
853 const char *name = SvPV_const(ST(i), len);
854 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
856 av_push(av, SvREFCNT_inc(layer));
867 #endif /* USE_ATTIBUTES_FOR_PERLIO */
870 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
872 HV * const stash = gv_stashpv("PerlIO::Layer", TRUE);
873 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
877 XS(XS_PerlIO__Layer__NoWarnings)
879 /* This is used as a %SIG{__WARN__} handler to supress warnings
880 during loading of layers.
884 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
888 XS(XS_PerlIO__Layer__find)
892 Perl_croak(aTHX_ "Usage class->find(name[,load])");
895 const char * const name = SvPV_const(ST(1), len);
896 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
897 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
899 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
906 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
908 if (!PL_known_layers)
909 PL_known_layers = PerlIO_list_alloc(aTHX);
910 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
911 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
915 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
918 const char *s = names;
920 while (isSPACE(*s) || *s == ':')
925 const char *as = Nullch;
927 if (!isIDFIRST(*s)) {
929 * Message is consistent with how attribute lists are
930 * passed. Even though this means "foo : : bar" is
931 * seen as an invalid separator character.
933 const char q = ((*s == '\'') ? '"' : '\'');
934 if (ckWARN(WARN_LAYER))
935 Perl_warner(aTHX_ packWARN(WARN_LAYER),
936 "Invalid separator character %c%c%c in PerlIO layer specification %s",
938 SETERRNO(EINVAL, LIB_INVARG);
943 } while (isALNUM(*e));
959 * It's a nul terminated string, not allowed
960 * to \ the terminating null. Anything other
961 * character is passed over.
971 if (ckWARN(WARN_LAYER))
972 Perl_warner(aTHX_ packWARN(WARN_LAYER),
973 "Argument list not closed for PerlIO layer \"%.*s\"",
985 PerlIO_funcs * const layer =
986 PerlIO_find_layer(aTHX_ s, llen, 1);
988 PerlIO_list_push(aTHX_ av, layer,
994 if (ckWARN(WARN_LAYER))
995 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1008 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1010 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1011 #ifdef PERLIO_USING_CRLF
1014 if (PerlIO_stdio.Set_ptrcnt)
1015 tab = &PerlIO_stdio;
1017 PerlIO_debug("Pushing %s\n", tab->name);
1018 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1023 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1025 return av->array[n].arg;
1029 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1031 if (n >= 0 && n < av->cur) {
1032 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1033 av->array[n].funcs->name);
1034 return av->array[n].funcs;
1037 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1042 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1044 PERL_UNUSED_ARG(mode);
1045 PERL_UNUSED_ARG(arg);
1046 PERL_UNUSED_ARG(tab);
1047 if (PerlIOValid(f)) {
1049 PerlIO_pop(aTHX_ f);
1055 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1056 sizeof(PerlIO_funcs),
1059 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1079 NULL, /* get_base */
1080 NULL, /* get_bufsiz */
1083 NULL, /* set_ptrcnt */
1087 PerlIO_default_layers(pTHX)
1089 if (!PL_def_layerlist) {
1090 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1091 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1092 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1093 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1095 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1097 osLayer = &PerlIO_win32;
1100 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1101 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1102 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1103 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1105 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1107 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1108 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1109 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1110 PerlIO_list_push(aTHX_ PL_def_layerlist,
1111 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1114 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1117 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1120 if (PL_def_layerlist->cur < 2) {
1121 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1123 return PL_def_layerlist;
1127 Perl_boot_core_PerlIO(pTHX)
1129 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1130 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1133 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1134 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1138 PerlIO_default_layer(pTHX_ I32 n)
1140 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1143 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1146 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1147 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1150 PerlIO_stdstreams(pTHX)
1153 PerlIO_allocate(aTHX);
1154 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1155 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1156 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1161 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1163 if (tab->fsize != sizeof(PerlIO_funcs)) {
1165 Perl_croak(aTHX_ "Layer does not match this perl");
1169 if (tab->size < sizeof(PerlIOl)) {
1172 /* Real layer with a data area */
1173 Newxc(l,tab->size,char,PerlIOl);
1175 Zero(l, tab->size, char);
1177 l->tab = (PerlIO_funcs*) tab;
1179 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1180 (mode) ? mode : "(Null)", (void*)arg);
1181 if (*l->tab->Pushed &&
1182 (*l->tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1183 PerlIO_pop(aTHX_ f);
1189 /* Pseudo-layer where push does its own stack adjust */
1190 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1191 (mode) ? mode : "(Null)", (void*)arg);
1193 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1201 PerlIOBase_binmode(pTHX_ PerlIO *f)
1203 if (PerlIOValid(f)) {
1204 /* Is layer suitable for raw stream ? */
1205 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1206 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1207 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1210 /* Not suitable - pop it */
1211 PerlIO_pop(aTHX_ f);
1219 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1221 PERL_UNUSED_ARG(mode);
1222 PERL_UNUSED_ARG(arg);
1223 PERL_UNUSED_ARG(tab);
1225 if (PerlIOValid(f)) {
1230 * Strip all layers that are not suitable for a raw stream
1233 while (t && (l = *t)) {
1234 if (l->tab->Binmode) {
1235 /* Has a handler - normal case */
1236 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1238 /* Layer still there - move down a layer */
1247 /* No handler - pop it */
1248 PerlIO_pop(aTHX_ t);
1251 if (PerlIOValid(f)) {
1252 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1260 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1261 PerlIO_list_t *layers, IV n, IV max)
1265 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1267 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1278 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1282 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1283 code = PerlIO_parse_layers(aTHX_ layers, names);
1285 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1287 PerlIO_list_free(aTHX_ layers);
1293 /*--------------------------------------------------------------------------------------*/
1295 * Given the abstraction above the public API functions
1299 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1301 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1302 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1303 (names) ? names : "(Null)");
1305 /* Do not flush etc. if (e.g.) switching encodings.
1306 if a pushed layer knows it needs to flush lower layers
1307 (for example :unix which is never going to call them)
1308 it can do the flush when it is pushed.
1310 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1313 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1314 #ifdef PERLIO_USING_CRLF
1315 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1316 O_BINARY so we can look for it in mode.
1318 if (!(mode & O_BINARY)) {
1320 /* FIXME?: Looking down the layer stack seems wrong,
1321 but is a way of reaching past (say) an encoding layer
1322 to flip CRLF-ness of the layer(s) below
1325 /* Perhaps we should turn on bottom-most aware layer
1326 e.g. Ilya's idea that UNIX TTY could serve
1328 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1329 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1330 /* Not in text mode - flush any pending stuff and flip it */
1332 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1334 /* Only need to turn it on in one layer so we are done */
1339 /* Not finding a CRLF aware layer presumably means we are binary
1340 which is not what was requested - so we failed
1341 We _could_ push :crlf layer but so could caller
1346 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1347 So code that used to be here is now in PerlIORaw_pushed().
1349 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), Nullch, Nullsv) ? TRUE : FALSE;
1354 PerlIO__close(pTHX_ PerlIO *f)
1356 if (PerlIOValid(f)) {
1357 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1358 if (tab && tab->Close)
1359 return (*tab->Close)(aTHX_ f);
1361 return PerlIOBase_close(aTHX_ f);
1364 SETERRNO(EBADF, SS_IVCHAN);
1370 Perl_PerlIO_close(pTHX_ PerlIO *f)
1372 const int code = PerlIO__close(aTHX_ f);
1373 while (PerlIOValid(f)) {
1374 PerlIO_pop(aTHX_ f);
1380 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1382 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1386 PerlIO_context_layers(pTHX_ const char *mode)
1388 const char *type = NULL;
1390 * Need to supply default layer info from open.pm
1393 SV *layers = PL_curcop->cop_io;
1396 type = SvPV_const(layers, len);
1397 if (type && mode[0] != 'r') {
1399 * Skip to write part
1401 const char *s = strchr(type, 0);
1402 if (s && (STRLEN)(s - type) < len) {
1411 static PerlIO_funcs *
1412 PerlIO_layer_from_ref(pTHX_ SV *sv)
1415 * For any scalar type load the handler which is bundled with perl
1417 if (SvTYPE(sv) < SVt_PVAV)
1418 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1421 * For other types allow if layer is known but don't try and load it
1423 switch (SvTYPE(sv)) {
1425 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1427 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1429 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1431 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1437 PerlIO_resolve_layers(pTHX_ const char *layers,
1438 const char *mode, int narg, SV **args)
1440 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1443 PerlIO_stdstreams(aTHX);
1447 * If it is a reference but not an object see if we have a handler
1450 if (SvROK(arg) && !sv_isobject(arg)) {
1451 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1453 def = PerlIO_list_alloc(aTHX);
1454 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1458 * Don't fail if handler cannot be found :via(...) etc. may do
1459 * something sensible else we will just stringfy and open
1464 if (!layers || !*layers)
1465 layers = PerlIO_context_layers(aTHX_ mode);
1466 if (layers && *layers) {
1470 av = PerlIO_list_alloc(aTHX);
1471 for (i = 0; i < def->cur; i++) {
1472 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1479 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1483 PerlIO_list_free(aTHX_ av);
1484 return (PerlIO_list_t *) NULL;
1495 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1496 int imode, int perm, PerlIO *f, int narg, SV **args)
1498 if (!f && narg == 1 && *args == &PL_sv_undef) {
1499 if ((f = PerlIO_tmpfile())) {
1500 if (!layers || !*layers)
1501 layers = PerlIO_context_layers(aTHX_ mode);
1502 if (layers && *layers)
1503 PerlIO_apply_layers(aTHX_ f, mode, layers);
1507 PerlIO_list_t *layera;
1509 PerlIO_funcs *tab = NULL;
1510 if (PerlIOValid(f)) {
1512 * This is "reopen" - it is not tested as perl does not use it
1516 layera = PerlIO_list_alloc(aTHX);
1518 SV * const arg = (l->tab->Getarg)
1519 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1521 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1522 l = *PerlIONext(&l);
1526 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1532 * Start at "top" of layer stack
1534 n = layera->cur - 1;
1536 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1545 * Found that layer 'n' can do opens - call it
1547 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1548 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1550 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1551 tab->name, layers, mode, fd, imode, perm,
1552 (void*)f, narg, (void*)args);
1554 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1557 SETERRNO(EINVAL, LIB_INVARG);
1561 if (n + 1 < layera->cur) {
1563 * More layers above the one that we used to open -
1566 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1567 /* If pushing layers fails close the file */
1574 PerlIO_list_free(aTHX_ layera);
1581 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1583 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1587 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1589 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1593 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1595 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1599 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1601 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1605 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1607 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1611 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1615 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1617 if (tab && tab->Flush)
1618 return (*tab->Flush) (aTHX_ f);
1620 return 0; /* If no Flush defined, silently succeed. */
1623 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1624 SETERRNO(EBADF, SS_IVCHAN);
1630 * Is it good API design to do flush-all on NULL, a potentially
1631 * errorneous input? Maybe some magical value (PerlIO*
1632 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1633 * things on fflush(NULL), but should we be bound by their design
1636 PerlIO **table = &PL_perlio;
1638 while ((f = *table)) {
1640 table = (PerlIO **) (f++);
1641 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1642 if (*f && PerlIO_flush(f) != 0)
1652 PerlIOBase_flush_linebuf(pTHX)
1654 PerlIO **table = &PL_perlio;
1656 while ((f = *table)) {
1658 table = (PerlIO **) (f++);
1659 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1662 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1663 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1671 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1673 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1677 PerlIO_isutf8(PerlIO *f)
1680 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1682 SETERRNO(EBADF, SS_IVCHAN);
1688 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1690 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1694 Perl_PerlIO_error(pTHX_ PerlIO *f)
1696 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1700 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1706 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1712 PerlIO_has_base(PerlIO *f)
1714 if (PerlIOValid(f)) {
1715 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1718 return (tab->Get_base != NULL);
1719 SETERRNO(EINVAL, LIB_INVARG);
1722 SETERRNO(EBADF, SS_IVCHAN);
1728 PerlIO_fast_gets(PerlIO *f)
1730 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1731 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1734 return (tab->Set_ptrcnt != NULL);
1735 SETERRNO(EINVAL, LIB_INVARG);
1738 SETERRNO(EBADF, SS_IVCHAN);
1744 PerlIO_has_cntptr(PerlIO *f)
1746 if (PerlIOValid(f)) {
1747 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1750 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1751 SETERRNO(EINVAL, LIB_INVARG);
1754 SETERRNO(EBADF, SS_IVCHAN);
1760 PerlIO_canset_cnt(PerlIO *f)
1762 if (PerlIOValid(f)) {
1763 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1766 return (tab->Set_ptrcnt != NULL);
1767 SETERRNO(EINVAL, LIB_INVARG);
1770 SETERRNO(EBADF, SS_IVCHAN);
1776 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1778 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1782 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1784 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1788 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1790 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1794 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1796 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1800 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1802 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1806 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1808 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1812 /*--------------------------------------------------------------------------------------*/
1814 * utf8 and raw dummy layers
1818 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1820 PERL_UNUSED_ARG(mode);
1821 PERL_UNUSED_ARG(arg);
1822 if (PerlIOValid(f)) {
1823 if (tab->kind & PERLIO_K_UTF8)
1824 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1826 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1832 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1833 sizeof(PerlIO_funcs),
1836 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1856 NULL, /* get_base */
1857 NULL, /* get_bufsiz */
1860 NULL, /* set_ptrcnt */
1863 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1864 sizeof(PerlIO_funcs),
1887 NULL, /* get_base */
1888 NULL, /* get_bufsiz */
1891 NULL, /* set_ptrcnt */
1895 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1896 IV n, const char *mode, int fd, int imode, int perm,
1897 PerlIO *old, int narg, SV **args)
1899 PerlIO_funcs * const tab = PerlIO_default_btm();
1900 PERL_UNUSED_ARG(self);
1901 if (tab && tab->Open)
1902 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1904 SETERRNO(EINVAL, LIB_INVARG);
1908 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1909 sizeof(PerlIO_funcs),
1932 NULL, /* get_base */
1933 NULL, /* get_bufsiz */
1936 NULL, /* set_ptrcnt */
1938 /*--------------------------------------------------------------------------------------*/
1939 /*--------------------------------------------------------------------------------------*/
1941 * "Methods" of the "base class"
1945 PerlIOBase_fileno(pTHX_ PerlIO *f)
1947 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1951 PerlIO_modestr(PerlIO * f, char *buf)
1954 if (PerlIOValid(f)) {
1955 const IV flags = PerlIOBase(f)->flags;
1956 if (flags & PERLIO_F_APPEND) {
1958 if (flags & PERLIO_F_CANREAD) {
1962 else if (flags & PERLIO_F_CANREAD) {
1964 if (flags & PERLIO_F_CANWRITE)
1967 else if (flags & PERLIO_F_CANWRITE) {
1969 if (flags & PERLIO_F_CANREAD) {
1973 #ifdef PERLIO_USING_CRLF
1974 if (!(flags & PERLIO_F_CRLF))
1984 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1986 PerlIOl * const l = PerlIOBase(f);
1987 PERL_UNUSED_ARG(arg);
1989 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1990 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1991 if (tab->Set_ptrcnt != NULL)
1992 l->flags |= PERLIO_F_FASTGETS;
1994 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1998 l->flags |= PERLIO_F_CANREAD;
2001 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2004 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2007 SETERRNO(EINVAL, LIB_INVARG);
2013 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2016 l->flags &= ~PERLIO_F_CRLF;
2019 l->flags |= PERLIO_F_CRLF;
2022 SETERRNO(EINVAL, LIB_INVARG);
2029 l->flags |= l->next->flags &
2030 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2035 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2036 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2037 l->flags, PerlIO_modestr(f, temp));
2043 PerlIOBase_popped(pTHX_ PerlIO *f)
2050 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2053 * Save the position as current head considers it
2055 const Off_t old = PerlIO_tell(f);
2056 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", Nullsv);
2057 PerlIOSelf(f, PerlIOBuf)->posn = old;
2058 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2062 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2064 STDCHAR *buf = (STDCHAR *) vbuf;
2066 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2067 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2068 SETERRNO(EBADF, SS_IVCHAN);
2074 SSize_t avail = PerlIO_get_cnt(f);
2077 take = ((SSize_t)count < avail) ? count : avail;
2079 STDCHAR *ptr = PerlIO_get_ptr(f);
2080 Copy(ptr, buf, take, STDCHAR);
2081 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2084 if (avail == 0) /* set_ptrcnt could have reset avail */
2087 if (count > 0 && avail <= 0) {
2088 if (PerlIO_fill(f) != 0)
2093 return (buf - (STDCHAR *) vbuf);
2099 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2106 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2113 PerlIOBase_close(pTHX_ PerlIO *f)
2116 if (PerlIOValid(f)) {
2117 PerlIO *n = PerlIONext(f);
2118 code = PerlIO_flush(f);
2119 PerlIOBase(f)->flags &=
2120 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2121 while (PerlIOValid(n)) {
2122 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2123 if (tab && tab->Close) {
2124 if ((*tab->Close)(aTHX_ n) != 0)
2129 PerlIOBase(n)->flags &=
2130 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2136 SETERRNO(EBADF, SS_IVCHAN);
2142 PerlIOBase_eof(pTHX_ PerlIO *f)
2144 if (PerlIOValid(f)) {
2145 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2151 PerlIOBase_error(pTHX_ PerlIO *f)
2153 if (PerlIOValid(f)) {
2154 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2160 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2162 if (PerlIOValid(f)) {
2163 PerlIO *n = PerlIONext(f);
2164 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2171 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2173 if (PerlIOValid(f)) {
2174 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2179 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2185 return sv_dup(arg, param);
2188 return newSVsv(arg);
2191 PERL_UNUSED_ARG(param);
2192 return newSVsv(arg);
2197 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2199 PerlIO * const nexto = PerlIONext(o);
2200 if (PerlIOValid(nexto)) {
2201 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2202 if (tab && tab->Dup)
2203 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2205 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2208 PerlIO_funcs *self = PerlIOBase(o)->tab;
2211 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2212 self->name, (void*)f, (void*)o, (void*)param);
2214 arg = (*self->Getarg)(aTHX_ o, param, flags);
2218 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2227 perl_mutex PerlIO_mutex;
2230 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2235 /* Place holder for stdstreams call ??? */
2237 MUTEX_INIT(&PerlIO_mutex);
2242 PerlIOUnix_refcnt_inc(int fd)
2245 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2247 MUTEX_LOCK(&PerlIO_mutex);
2249 PL_perlio_fd_refcnt[fd]++;
2250 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2252 MUTEX_UNLOCK(&PerlIO_mutex);
2258 PerlIOUnix_refcnt_dec(int fd)
2262 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2264 MUTEX_LOCK(&PerlIO_mutex);
2266 cnt = --PL_perlio_fd_refcnt[fd];
2267 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2269 MUTEX_UNLOCK(&PerlIO_mutex);
2276 PerlIO_cleanup(pTHX)
2280 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2282 PerlIO_debug("Cleanup layers\n");
2284 /* Raise STDIN..STDERR refcount so we don't close them */
2285 for (i=0; i < 3; i++)
2286 PerlIOUnix_refcnt_inc(i);
2287 PerlIO_cleantable(aTHX_ &PL_perlio);
2288 /* Restore STDIN..STDERR refcount */
2289 for (i=0; i < 3; i++)
2290 PerlIOUnix_refcnt_dec(i);
2292 if (PL_known_layers) {
2293 PerlIO_list_free(aTHX_ PL_known_layers);
2294 PL_known_layers = NULL;
2296 if (PL_def_layerlist) {
2297 PerlIO_list_free(aTHX_ PL_def_layerlist);
2298 PL_def_layerlist = NULL;
2304 /*--------------------------------------------------------------------------------------*/
2306 * Bottom-most level for UNIX-like case
2310 struct _PerlIO base; /* The generic part */
2311 int fd; /* UNIX like file descriptor */
2312 int oflags; /* open/fcntl flags */
2316 PerlIOUnix_oflags(const char *mode)
2319 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2324 if (*++mode == '+') {
2331 oflags = O_CREAT | O_TRUNC;
2332 if (*++mode == '+') {
2341 oflags = O_CREAT | O_APPEND;
2342 if (*++mode == '+') {
2355 else if (*mode == 't') {
2357 oflags &= ~O_BINARY;
2361 * Always open in binary mode
2364 if (*mode || oflags == -1) {
2365 SETERRNO(EINVAL, LIB_INVARG);
2372 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2374 return PerlIOSelf(f, PerlIOUnix)->fd;
2378 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2380 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2383 if (PerlLIO_fstat(fd, &st) == 0) {
2384 if (!S_ISREG(st.st_mode)) {
2385 PerlIO_debug("%d is not regular file\n",fd);
2386 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2389 PerlIO_debug("%d _is_ a regular file\n",fd);
2395 PerlIOUnix_refcnt_inc(fd);
2399 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2401 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2402 if (*PerlIONext(f)) {
2403 /* We never call down so do any pending stuff now */
2404 PerlIO_flush(PerlIONext(f));
2406 * XXX could (or should) we retrieve the oflags from the open file
2407 * handle rather than believing the "mode" we are passed in? XXX
2408 * Should the value on NULL mode be 0 or -1?
2410 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2411 mode ? PerlIOUnix_oflags(mode) : -1);
2413 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2419 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2421 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2423 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2425 SETERRNO(ESPIPE, LIB_INVARG);
2427 SETERRNO(EINVAL, LIB_INVARG);
2431 new_loc = PerlLIO_lseek(fd, offset, whence);
2432 if (new_loc == (Off_t) - 1)
2436 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2441 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2442 IV n, const char *mode, int fd, int imode,
2443 int perm, PerlIO *f, int narg, SV **args)
2445 if (PerlIOValid(f)) {
2446 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2447 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2450 if (*mode == IoTYPE_NUMERIC)
2453 imode = PerlIOUnix_oflags(mode);
2457 const char *path = SvPV_nolen_const(*args);
2458 fd = PerlLIO_open3(path, imode, perm);
2462 if (*mode == IoTYPE_IMPLICIT)
2465 f = PerlIO_allocate(aTHX);
2467 if (!PerlIOValid(f)) {
2468 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2472 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2473 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2474 if (*mode == IoTYPE_APPEND)
2475 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2481 * FIXME: pop layers ???
2489 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2491 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2493 if (flags & PERLIO_DUP_FD) {
2494 fd = PerlLIO_dup(fd);
2496 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2497 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2499 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2500 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2509 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2511 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2512 #ifdef PERLIO_STD_SPECIAL
2514 return PERLIO_STD_IN(fd, vbuf, count);
2516 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2517 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2521 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2522 if (len >= 0 || errno != EINTR) {
2524 if (errno != EAGAIN) {
2525 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2528 else if (len == 0 && count != 0) {
2529 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2540 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2542 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2543 #ifdef PERLIO_STD_SPECIAL
2544 if (fd == 1 || fd == 2)
2545 return PERLIO_STD_OUT(fd, vbuf, count);
2548 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2549 if (len >= 0 || errno != EINTR) {
2551 if (errno != EAGAIN) {
2552 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2563 PerlIOUnix_tell(pTHX_ PerlIO *f)
2565 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2570 PerlIOUnix_close(pTHX_ PerlIO *f)
2572 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2574 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2575 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2576 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2581 SETERRNO(EBADF,SS_IVCHAN);
2584 while (PerlLIO_close(fd) != 0) {
2585 if (errno != EINTR) {
2592 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2597 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2598 sizeof(PerlIO_funcs),
2605 PerlIOBase_binmode, /* binmode */
2615 PerlIOBase_noop_ok, /* flush */
2616 PerlIOBase_noop_fail, /* fill */
2619 PerlIOBase_clearerr,
2620 PerlIOBase_setlinebuf,
2621 NULL, /* get_base */
2622 NULL, /* get_bufsiz */
2625 NULL, /* set_ptrcnt */
2628 /*--------------------------------------------------------------------------------------*/
2633 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2634 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2635 broken by the last second glibc 2.3 fix
2637 #define STDIO_BUFFER_WRITABLE
2642 struct _PerlIO base;
2643 FILE *stdio; /* The stream */
2647 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2649 if (PerlIOValid(f)) {
2650 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2652 return PerlSIO_fileno(s);
2659 PerlIOStdio_mode(const char *mode, char *tmode)
2661 char * const ret = tmode;
2667 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2675 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2678 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2679 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2680 if (toptab == tab) {
2681 /* Top is already stdio - pop self (duplicate) and use original */
2682 PerlIO_pop(aTHX_ f);
2685 const int fd = PerlIO_fileno(n);
2688 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2689 mode = PerlIOStdio_mode(mode, tmode)))) {
2690 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2691 /* We never call down so do any pending stuff now */
2692 PerlIO_flush(PerlIONext(f));
2699 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2704 PerlIO_importFILE(FILE *stdio, const char *mode)
2710 if (!mode || !*mode) {
2711 /* We need to probe to see how we can open the stream
2712 so start with read/write and then try write and read
2713 we dup() so that we can fclose without loosing the fd.
2715 Note that the errno value set by a failing fdopen
2716 varies between stdio implementations.
2718 const int fd = PerlLIO_dup(fileno(stdio));
2719 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2721 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2724 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2727 /* Don't seem to be able to open */
2733 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, Nullsv))) {
2734 s = PerlIOSelf(f, PerlIOStdio);
2742 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2743 IV n, const char *mode, int fd, int imode,
2744 int perm, PerlIO *f, int narg, SV **args)
2747 if (PerlIOValid(f)) {
2748 const char *path = SvPV_nolen_const(*args);
2749 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2751 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2752 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2757 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2762 const char *path = SvPV_nolen_const(*args);
2763 if (*mode == IoTYPE_NUMERIC) {
2765 fd = PerlLIO_open3(path, imode, perm);
2769 bool appended = FALSE;
2771 /* Cygwin wants its 'b' early. */
2773 mode = PerlIOStdio_mode(mode, tmode);
2775 stdio = PerlSIO_fopen(path, mode);
2779 f = PerlIO_allocate(aTHX);
2782 mode = PerlIOStdio_mode(mode, tmode);
2783 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2785 s = PerlIOSelf(f, PerlIOStdio);
2787 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2799 if (*mode == IoTYPE_IMPLICIT) {
2806 stdio = PerlSIO_stdin;
2809 stdio = PerlSIO_stdout;
2812 stdio = PerlSIO_stderr;
2817 stdio = PerlSIO_fdopen(fd, mode =
2818 PerlIOStdio_mode(mode, tmode));
2822 f = PerlIO_allocate(aTHX);
2824 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2825 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2827 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2837 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2839 /* This assumes no layers underneath - which is what
2840 happens, but is not how I remember it. NI-S 2001/10/16
2842 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2843 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2844 const int fd = fileno(stdio);
2846 if (flags & PERLIO_DUP_FD) {
2847 const int dfd = PerlLIO_dup(fileno(stdio));
2849 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2853 /* FIXME: To avoid messy error recovery if dup fails
2854 re-use the existing stdio as though flag was not set
2858 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2860 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2861 PerlIOUnix_refcnt_inc(fileno(stdio));
2867 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2869 /* XXX this could use PerlIO_canset_fileno() and
2870 * PerlIO_set_fileno() support from Configure
2872 # if defined(__UCLIBC__)
2873 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2876 # elif defined(__GLIBC__)
2877 /* There may be a better way for GLIBC:
2878 - libio.h defines a flag to not close() on cleanup
2882 # elif defined(__sun__)
2884 /* On solaris, if _LP64 is defined, the FILE structure is this:
2890 * It turns out that the fd is stored in the top 32 bits of
2891 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2892 * to contain a pointer or offset into another structure. All the
2893 * remaining fields are zero.
2895 * We set the top bits to -1 (0xFFFFFFFF).
2897 f->__pad[4] |= 0xffffffff00000000L;
2898 assert(fileno(f) == 0xffffffff);
2899 # else /* !defined(_LP64) */
2900 /* _file is just a unsigned char :-(
2901 Not clear why we dup() rather than using -1
2902 even if that would be treated as 0xFF - so will
2905 f->_file = PerlLIO_dup(fileno(f));
2906 # endif /* defined(_LP64) */
2908 # elif defined(__hpux)
2912 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2913 your platform does not have special entry try this one.
2914 [For OSF only have confirmation for Tru64 (alpha)
2915 but assume other OSFs will be similar.]
2917 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2920 # elif defined(__FreeBSD__)
2921 /* There may be a better way on FreeBSD:
2922 - we could insert a dummy func in the _close function entry
2923 f->_close = (int (*)(void *)) dummy_close;
2927 # elif defined(__OpenBSD__)
2928 /* There may be a better way on OpenBSD:
2929 - we could insert a dummy func in the _close function entry
2930 f->_close = (int (*)(void *)) dummy_close;
2934 # elif defined(__EMX__)
2935 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2938 # elif defined(__CYGWIN__)
2939 /* There may be a better way on CYGWIN:
2940 - we could insert a dummy func in the _close function entry
2941 f->_close = (int (*)(void *)) dummy_close;
2945 # elif defined(WIN32)
2946 # if defined(__BORLANDC__)
2947 f->fd = PerlLIO_dup(fileno(f));
2948 # elif defined(UNDER_CE)
2949 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2958 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2959 (which isn't thread safe) instead
2961 # error "Don't know how to set FILE.fileno on your platform"
2969 PerlIOStdio_close(pTHX_ PerlIO *f)
2971 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2977 const int fd = fileno(stdio);
2983 #ifdef SOCKS5_VERSION_NAME
2984 /* Socks lib overrides close() but stdio isn't linked to
2985 that library (though we are) - so we must call close()
2986 on sockets on stdio's behalf.
2989 Sock_size_t optlen = sizeof(int);
2990 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2995 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2996 /* File descriptor still in use */
3001 /* For STD* handles don't close the stdio at all
3002 this is because we have shared the FILE * too
3004 if (stdio == stdin) {
3005 /* Some stdios are buggy fflush-ing inputs */
3008 else if (stdio == stdout || stdio == stderr) {
3009 return PerlIO_flush(f);
3011 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3012 Use Sarathy's trick from maint-5.6 to invalidate the
3013 fileno slot of the FILE *
3015 result = PerlIO_flush(f);
3017 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
3018 dupfd = PerlLIO_dup(fd);
3021 result = PerlSIO_fclose(stdio);
3022 /* We treat error from stdio as success if we invalidated
3023 errno may NOT be expected EBADF
3025 if (invalidate && result != 0) {
3030 /* in SOCKS case let close() determine return value */
3034 PerlLIO_dup2(dupfd,fd);
3035 PerlLIO_close(dupfd);
3042 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3044 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3048 STDCHAR *buf = (STDCHAR *) vbuf;
3050 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3051 * stdio does not do that for fread()
3053 const int ch = PerlSIO_fgetc(s);
3060 got = PerlSIO_fread(vbuf, 1, count, s);
3061 if (got == 0 && PerlSIO_ferror(s))
3063 if (got >= 0 || errno != EINTR)
3066 SETERRNO(0,0); /* just in case */
3072 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3075 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3077 #ifdef STDIO_BUFFER_WRITABLE
3078 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3079 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3080 STDCHAR *base = PerlIO_get_base(f);
3081 SSize_t cnt = PerlIO_get_cnt(f);
3082 STDCHAR *ptr = PerlIO_get_ptr(f);
3083 SSize_t avail = ptr - base;
3085 if (avail > count) {
3089 Move(buf-avail,ptr,avail,STDCHAR);
3092 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3093 if (PerlSIO_feof(s) && unread >= 0)
3094 PerlSIO_clearerr(s);
3099 if (PerlIO_has_cntptr(f)) {
3100 /* We can get pointer to buffer but not its base
3101 Do ungetc() but check chars are ending up in the
3104 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3105 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3107 const int ch = *--buf & 0xFF;
3108 if (ungetc(ch,s) != ch) {
3109 /* ungetc did not work */
3112 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3113 /* Did not change pointer as expected */
3114 fgetc(s); /* get char back again */
3124 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3130 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3134 got = PerlSIO_fwrite(vbuf, 1, count,
3135 PerlIOSelf(f, PerlIOStdio)->stdio);
3136 if (got >= 0 || errno != EINTR)
3139 SETERRNO(0,0); /* just in case */
3145 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3147 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3148 return PerlSIO_fseek(stdio, offset, whence);
3152 PerlIOStdio_tell(pTHX_ PerlIO *f)
3154 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3155 return PerlSIO_ftell(stdio);
3159 PerlIOStdio_flush(pTHX_ PerlIO *f)
3161 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3162 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3163 return PerlSIO_fflush(stdio);
3168 * FIXME: This discards ungetc() and pre-read stuff which is not
3169 * right if this is just a "sync" from a layer above Suspect right
3170 * design is to do _this_ but not have layer above flush this
3171 * layer read-to-read
3174 * Not writeable - sync by attempting a seek
3177 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3185 PerlIOStdio_eof(pTHX_ PerlIO *f)
3187 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3191 PerlIOStdio_error(pTHX_ PerlIO *f)
3193 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3197 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3199 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3203 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3205 #ifdef HAS_SETLINEBUF
3206 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3208 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3214 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3216 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3217 return (STDCHAR*)PerlSIO_get_base(stdio);
3221 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3223 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3224 return PerlSIO_get_bufsiz(stdio);
3228 #ifdef USE_STDIO_PTR
3230 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3232 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3233 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3237 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3239 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3240 return PerlSIO_get_cnt(stdio);
3244 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3246 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3248 #ifdef STDIO_PTR_LVALUE
3249 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3250 #ifdef STDIO_PTR_LVAL_SETS_CNT
3251 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3252 assert(PerlSIO_get_cnt(stdio) == (cnt));
3255 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3257 * Setting ptr _does_ change cnt - we are done
3261 #else /* STDIO_PTR_LVALUE */
3263 #endif /* STDIO_PTR_LVALUE */
3266 * Now (or only) set cnt
3268 #ifdef STDIO_CNT_LVALUE
3269 PerlSIO_set_cnt(stdio, cnt);
3270 #else /* STDIO_CNT_LVALUE */
3271 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3272 PerlSIO_set_ptr(stdio,
3273 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3275 #else /* STDIO_PTR_LVAL_SETS_CNT */
3277 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3278 #endif /* STDIO_CNT_LVALUE */
3285 PerlIOStdio_fill(pTHX_ PerlIO *f)
3287 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3290 * fflush()ing read-only streams can cause trouble on some stdio-s
3292 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3293 if (PerlSIO_fflush(stdio) != 0)
3296 c = PerlSIO_fgetc(stdio);
3300 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3302 #ifdef STDIO_BUFFER_WRITABLE
3303 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3304 /* Fake ungetc() to the real buffer in case system's ungetc
3307 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3308 SSize_t cnt = PerlSIO_get_cnt(stdio);
3309 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3310 if (ptr == base+1) {
3311 *--ptr = (STDCHAR) c;
3312 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3313 if (PerlSIO_feof(stdio))
3314 PerlSIO_clearerr(stdio);
3320 if (PerlIO_has_cntptr(f)) {
3322 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3329 /* An ungetc()d char is handled separately from the regular
3330 * buffer, so we stuff it in the buffer ourselves.
3331 * Should never get called as should hit code above
3333 *(--((*stdio)->_ptr)) = (unsigned char) c;
3336 /* If buffer snoop scheme above fails fall back to
3339 if (PerlSIO_ungetc(c, stdio) != c)
3347 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3348 sizeof(PerlIO_funcs),
3350 sizeof(PerlIOStdio),
3351 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3355 PerlIOBase_binmode, /* binmode */
3369 PerlIOStdio_clearerr,
3370 PerlIOStdio_setlinebuf,
3372 PerlIOStdio_get_base,
3373 PerlIOStdio_get_bufsiz,
3378 #ifdef USE_STDIO_PTR
3379 PerlIOStdio_get_ptr,
3380 PerlIOStdio_get_cnt,
3381 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3382 PerlIOStdio_set_ptrcnt,
3385 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3390 #endif /* USE_STDIO_PTR */
3393 /* Note that calls to PerlIO_exportFILE() are reversed using
3394 * PerlIO_releaseFILE(), not importFILE. */
3396 PerlIO_exportFILE(PerlIO * f, const char *mode)
3400 if (PerlIOValid(f)) {
3403 if (!mode || !*mode) {
3404 mode = PerlIO_modestr(f, buf);
3406 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3410 /* De-link any lower layers so new :stdio sticks */
3412 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, Nullsv))) {
3413 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3415 /* Link previous lower layers under new one */
3419 /* restore layers list */
3429 PerlIO_findFILE(PerlIO *f)
3433 if (l->tab == &PerlIO_stdio) {
3434 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3437 l = *PerlIONext(&l);
3439 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3440 return PerlIO_exportFILE(f, Nullch);
3443 /* Use this to reverse PerlIO_exportFILE calls. */
3445 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3450 if (l->tab == &PerlIO_stdio) {
3451 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3452 if (s->stdio == f) {
3454 PerlIO_pop(aTHX_ p);
3463 /*--------------------------------------------------------------------------------------*/
3465 * perlio buffer layer
3469 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3471 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3472 const int fd = PerlIO_fileno(f);
3473 if (fd >= 0 && PerlLIO_isatty(fd)) {
3474 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3476 if (*PerlIONext(f)) {
3477 const Off_t posn = PerlIO_tell(PerlIONext(f));
3478 if (posn != (Off_t) - 1) {
3482 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3486 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3487 IV n, const char *mode, int fd, int imode, int perm,
3488 PerlIO *f, int narg, SV **args)
3490 if (PerlIOValid(f)) {
3491 PerlIO *next = PerlIONext(f);
3493 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3494 if (tab && tab->Open)
3496 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3498 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3503 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3505 if (*mode == IoTYPE_IMPLICIT) {
3511 if (tab && tab->Open)
3512 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3515 SETERRNO(EINVAL, LIB_INVARG);
3517 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3519 * if push fails during open, open fails. close will pop us.
3524 fd = PerlIO_fileno(f);
3525 if (init && fd == 2) {
3527 * Initial stderr is unbuffered
3529 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3531 #ifdef PERLIO_USING_CRLF
3532 # ifdef PERLIO_IS_BINMODE_FD
3533 if (PERLIO_IS_BINMODE_FD(fd))
3534 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3538 * do something about failing setmode()? --jhi
3540 PerlLIO_setmode(fd, O_BINARY);
3549 * This "flush" is akin to sfio's sync in that it handles files in either
3550 * read or write state. For write state, we put the postponed data through
3551 * the next layers. For read state, we seek() the next layers to the
3552 * offset given by current position in the buffer, and discard the buffer
3553 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3554 * in any case?). Then the pass the stick further in chain.
3557 PerlIOBuf_flush(pTHX_ PerlIO *f)
3559 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3561 PerlIO *n = PerlIONext(f);
3562 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3564 * write() the buffer
3566 const STDCHAR *buf = b->buf;
3567 const STDCHAR *p = buf;
3568 while (p < b->ptr) {
3569 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3573 else if (count < 0 || PerlIO_error(n)) {
3574 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3579 b->posn += (p - buf);
3581 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3582 STDCHAR *buf = PerlIO_get_base(f);
3584 * Note position change
3586 b->posn += (b->ptr - buf);
3587 if (b->ptr < b->end) {
3588 /* We did not consume all of it - try and seek downstream to
3589 our logical position
3591 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3592 /* Reload n as some layers may pop themselves on seek */
3593 b->posn = PerlIO_tell(n = PerlIONext(f));
3596 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3597 data is lost for good - so return saying "ok" having undone
3600 b->posn -= (b->ptr - buf);
3605 b->ptr = b->end = b->buf;
3606 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3607 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3608 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3613 /* This discards the content of the buffer after b->ptr, and rereads
3614 * the buffer from the position off in the layer downstream; here off
3615 * is at offset corresponding to b->ptr - b->buf.
3618 PerlIOBuf_fill(pTHX_ PerlIO *f)
3620 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3621 PerlIO *n = PerlIONext(f);
3624 * Down-stream flush is defined not to loose read data so is harmless.
3625 * we would not normally be fill'ing if there was data left in anycase.
3627 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3629 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3630 PerlIOBase_flush_linebuf(aTHX);
3633 PerlIO_get_base(f); /* allocate via vtable */
3635 b->ptr = b->end = b->buf;
3637 if (!PerlIOValid(n)) {
3638 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3642 if (PerlIO_fast_gets(n)) {
3644 * Layer below is also buffered. We do _NOT_ want to call its
3645 * ->Read() because that will loop till it gets what we asked for
3646 * which may hang on a pipe etc. Instead take anything it has to
3647 * hand, or ask it to fill _once_.
3649 avail = PerlIO_get_cnt(n);
3651 avail = PerlIO_fill(n);
3653 avail = PerlIO_get_cnt(n);
3655 if (!PerlIO_error(n) && PerlIO_eof(n))
3660 STDCHAR *ptr = PerlIO_get_ptr(n);
3661 SSize_t cnt = avail;
3662 if (avail > (SSize_t)b->bufsiz)
3664 Copy(ptr, b->buf, avail, STDCHAR);
3665 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3669 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3673 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3675 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3678 b->end = b->buf + avail;
3679 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3684 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3686 if (PerlIOValid(f)) {
3687 const PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3690 return PerlIOBase_read(aTHX_ f, vbuf, count);
3696 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3698 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3699 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3702 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3707 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3709 * Buffer is already a read buffer, we can overwrite any chars
3710 * which have been read back to buffer start
3712 avail = (b->ptr - b->buf);
3716 * Buffer is idle, set it up so whole buffer is available for
3720 b->end = b->buf + avail;
3722 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3724 * Buffer extends _back_ from where we are now
3726 b->posn -= b->bufsiz;
3728 if (avail > (SSize_t) count) {
3730 * If we have space for more than count, just move count
3738 * In simple stdio-like ungetc() case chars will be already
3741 if (buf != b->ptr) {
3742 Copy(buf, b->ptr, avail, STDCHAR);
3746 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3750 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3756 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3758 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3759 const STDCHAR *buf = (const STDCHAR *) vbuf;
3760 const STDCHAR *flushptr = buf;
3764 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3766 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3767 if (PerlIO_flush(f) != 0) {
3771 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3772 flushptr = buf + count;
3773 while (flushptr > buf && *(flushptr - 1) != '\n')
3777 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3778 if ((SSize_t) count < avail)
3780 if (flushptr > buf && flushptr <= buf + avail)
3781 avail = flushptr - buf;
3782 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3784 Copy(buf, b->ptr, avail, STDCHAR);
3789 if (buf == flushptr)
3792 if (b->ptr >= (b->buf + b->bufsiz))
3795 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3801 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3804 if ((code = PerlIO_flush(f)) == 0) {
3805 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3806 code = PerlIO_seek(PerlIONext(f), offset, whence);
3808 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3809 b->posn = PerlIO_tell(PerlIONext(f));
3816 PerlIOBuf_tell(pTHX_ PerlIO *f)
3818 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3820 * b->posn is file position where b->buf was read, or will be written
3822 Off_t posn = b->posn;
3823 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3824 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3826 /* As O_APPEND files are normally shared in some sense it is better
3831 /* when file is NOT shared then this is sufficient */
3832 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3834 posn = b->posn = PerlIO_tell(PerlIONext(f));
3838 * If buffer is valid adjust position by amount in buffer
3840 posn += (b->ptr - b->buf);
3846 PerlIOBuf_popped(pTHX_ PerlIO *f)
3848 const IV code = PerlIOBase_popped(aTHX_ f);
3849 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3850 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3854 b->ptr = b->end = b->buf;
3855 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3860 PerlIOBuf_close(pTHX_ PerlIO *f)
3862 const IV code = PerlIOBase_close(aTHX_ f);
3863 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3864 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3868 b->ptr = b->end = b->buf;
3869 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3874 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3876 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3883 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3885 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3888 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3889 return (b->end - b->ptr);
3894 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3896 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3900 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3902 b->buf = (STDCHAR *) & b->oneword;
3903 b->bufsiz = sizeof(b->oneword);
3912 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3914 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3917 return (b->end - b->buf);
3921 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3923 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3927 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3928 assert(PerlIO_get_cnt(f) == cnt);
3929 assert(b->ptr >= b->buf);
3931 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3935 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3937 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3942 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
3943 sizeof(PerlIO_funcs),
3946 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3950 PerlIOBase_binmode, /* binmode */
3964 PerlIOBase_clearerr,
3965 PerlIOBase_setlinebuf,
3970 PerlIOBuf_set_ptrcnt,
3973 /*--------------------------------------------------------------------------------------*/
3975 * Temp layer to hold unread chars when cannot do it any other way
3979 PerlIOPending_fill(pTHX_ PerlIO *f)
3982 * Should never happen
3989 PerlIOPending_close(pTHX_ PerlIO *f)
3992 * A tad tricky - flush pops us, then we close new top
3995 return PerlIO_close(f);
3999 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4002 * A tad tricky - flush pops us, then we seek new top
4005 return PerlIO_seek(f, offset, whence);
4010 PerlIOPending_flush(pTHX_ PerlIO *f)
4012 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4013 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4017 PerlIO_pop(aTHX_ f);
4022 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4028 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4033 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4035 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4036 PerlIOl *l = PerlIOBase(f);
4038 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4039 * etc. get muddled when it changes mid-string when we auto-pop.
4041 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4042 (PerlIOBase(PerlIONext(f))->
4043 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4048 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4050 SSize_t avail = PerlIO_get_cnt(f);
4052 if ((SSize_t)count < avail)
4055 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4056 if (got >= 0 && got < (SSize_t)count) {
4057 const SSize_t more =
4058 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4059 if (more >= 0 || got == 0)
4065 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4066 sizeof(PerlIO_funcs),
4069 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4070 PerlIOPending_pushed,
4073 PerlIOBase_binmode, /* binmode */
4082 PerlIOPending_close,
4083 PerlIOPending_flush,
4087 PerlIOBase_clearerr,
4088 PerlIOBase_setlinebuf,
4093 PerlIOPending_set_ptrcnt,
4098 /*--------------------------------------------------------------------------------------*/
4100 * crlf - translation On read translate CR,LF to "\n" we do this by
4101 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4102 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4104 * c->nl points on the first byte of CR LF pair when it is temporarily
4105 * replaced by LF, or to the last CR of the buffer. In the former case
4106 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4107 * that it ends at c->nl; these two cases can be distinguished by
4108 * *c->nl. c->nl is set during _getcnt() call, and unset during
4109 * _unread() and _flush() calls.
4110 * It only matters for read operations.
4114 PerlIOBuf base; /* PerlIOBuf stuff */
4115 STDCHAR *nl; /* Position of crlf we "lied" about in the
4120 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4123 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4124 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4126 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4127 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4128 PerlIOBase(f)->flags);
4131 /* Enable the first CRLF capable layer you can find, but if none
4132 * found, the one we just pushed is fine. This results in at
4133 * any given moment at most one CRLF-capable layer being enabled
4134 * in the whole layer stack. */
4135 PerlIO *g = PerlIONext(f);
4137 PerlIOl *b = PerlIOBase(g);
4138 if (b && b->tab == &PerlIO_crlf) {
4139 if (!(b->flags & PERLIO_F_CRLF))
4140 b->flags |= PERLIO_F_CRLF;
4141 PerlIO_pop(aTHX_ f);
4152 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4154 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4155 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4159 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4160 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4162 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4163 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4165 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4170 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4171 b->end = b->ptr = b->buf + b->bufsiz;
4172 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4173 b->posn -= b->bufsiz;
4175 while (count > 0 && b->ptr > b->buf) {
4178 if (b->ptr - 2 >= b->buf) {
4185 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4186 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4202 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4204 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4206 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4209 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4210 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4211 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4212 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4214 while (nl < b->end && *nl != 0xd)
4216 if (nl < b->end && *nl == 0xd) {
4218 if (nl + 1 < b->end) {
4225 * Not CR,LF but just CR
4233 * Blast - found CR as last char in buffer
4238 * They may not care, defer work as long as
4242 return (nl - b->ptr);
4246 b->ptr++; /* say we have read it as far as
4247 * flush() is concerned */
4248 b->buf++; /* Leave space in front of buffer */
4249 /* Note as we have moved buf up flush's
4251 will naturally make posn point at CR
4253 b->bufsiz--; /* Buffer is thus smaller */
4254 code = PerlIO_fill(f); /* Fetch some more */
4255 b->bufsiz++; /* Restore size for next time */
4256 b->buf--; /* Point at space */
4257 b->ptr = nl = b->buf; /* Which is what we hand
4259 *nl = 0xd; /* Fill in the CR */
4261 goto test; /* fill() call worked */
4263 * CR at EOF - just fall through
4265 /* Should we clear EOF though ??? */
4270 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4276 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4278 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4279 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4285 if (ptr == b->end && *c->nl == 0xd) {
4286 /* Defered CR at end of buffer case - we lied about count */
4298 * Test code - delete when it works ...
4300 IV flags = PerlIOBase(f)->flags;
4301 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4302 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4303 /* Defered CR at end of buffer case - we lied about count */
4309 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4310 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4318 * They have taken what we lied about
4326 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4330 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4332 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4333 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4335 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4336 const STDCHAR *buf = (const STDCHAR *) vbuf;
4337 const STDCHAR *ebuf = buf + count;
4340 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4342 while (buf < ebuf) {
4343 STDCHAR *eptr = b->buf + b->bufsiz;
4344 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4345 while (buf < ebuf && b->ptr < eptr) {
4347 if ((b->ptr + 2) > eptr) {
4355 *(b->ptr)++ = 0xd; /* CR */
4356 *(b->ptr)++ = 0xa; /* LF */
4358 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4368 if (b->ptr >= eptr) {
4374 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4376 return (buf - (STDCHAR *) vbuf);
4381 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4383 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4388 return PerlIOBuf_flush(aTHX_ f);
4392 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4394 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4395 /* In text mode - flush any pending stuff and flip it */
4396 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4397 #ifndef PERLIO_USING_CRLF
4398 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4399 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4400 PerlIO_pop(aTHX_ f);
4407 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4408 sizeof(PerlIO_funcs),
4411 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4413 PerlIOBuf_popped, /* popped */
4415 PerlIOCrlf_binmode, /* binmode */
4419 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4420 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4421 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4429 PerlIOBase_clearerr,
4430 PerlIOBase_setlinebuf,
4435 PerlIOCrlf_set_ptrcnt,
4439 /*--------------------------------------------------------------------------------------*/
4441 * mmap as "buffer" layer
4445 PerlIOBuf base; /* PerlIOBuf stuff */
4446 Mmap_t mptr; /* Mapped address */
4447 Size_t len; /* mapped length */
4448 STDCHAR *bbuf; /* malloced buffer if map fails */
4452 PerlIOMmap_map(pTHX_ PerlIO *f)
4455 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4456 const IV flags = PerlIOBase(f)->flags;
4460 if (flags & PERLIO_F_CANREAD) {
4461 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4462 const int fd = PerlIO_fileno(f);
4464 code = Fstat(fd, &st);
4465 if (code == 0 && S_ISREG(st.st_mode)) {
4466 SSize_t len = st.st_size - b->posn;
4469 if (PL_mmap_page_size <= 0)
4470 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4474 * This is a hack - should never happen - open should
4477 b->posn = PerlIO_tell(PerlIONext(f));
4479 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4480 len = st.st_size - posn;
4481 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4482 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4483 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4484 madvise(m->mptr, len, MADV_SEQUENTIAL);
4486 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4487 madvise(m->mptr, len, MADV_WILLNEED);
4489 PerlIOBase(f)->flags =
4490 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4491 b->end = ((STDCHAR *) m->mptr) + len;
4492 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4501 PerlIOBase(f)->flags =
4502 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4504 b->ptr = b->end = b->ptr;
4513 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4515 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4516 PerlIOBuf *b = &m->base;
4520 code = munmap(m->mptr, m->len);
4524 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4527 b->ptr = b->end = b->buf;
4528 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4534 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4536 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4537 PerlIOBuf *b = &m->base;
4538 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4540 * Already have a readbuffer in progress
4546 * We have a write buffer or flushed PerlIOBuf read buffer
4548 m->bbuf = b->buf; /* save it in case we need it again */
4549 b->buf = NULL; /* Clear to trigger below */
4552 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4555 * Map did not work - recover PerlIOBuf buffer if we have one
4560 b->ptr = b->end = b->buf;
4563 return PerlIOBuf_get_base(aTHX_ f);
4567 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4569 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4570 PerlIOBuf *b = &m->base;
4571 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4573 if (b->ptr && (b->ptr - count) >= b->buf
4574 && memEQ(b->ptr - count, vbuf, count)) {
4576 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4581 * Loose the unwritable mapped buffer
4585 * If flush took the "buffer" see if we have one from before
4587 if (!b->buf && m->bbuf)
4590 PerlIOBuf_get_base(aTHX_ f);
4594 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4598 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4600 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4601 PerlIOBuf * const b = &m->base;
4603 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4605 * No, or wrong sort of, buffer
4608 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4612 * If unmap took the "buffer" see if we have one from before
4614 if (!b->buf && m->bbuf)
4617 PerlIOBuf_get_base(aTHX_ f);
4621 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4625 PerlIOMmap_flush(pTHX_ PerlIO *f)
4627 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4628 PerlIOBuf *b = &m->base;
4629 IV code = PerlIOBuf_flush(aTHX_ f);
4631 * Now we are "synced" at PerlIOBuf level
4638 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4643 * We seem to have a PerlIOBuf buffer which was not mapped
4644 * remember it in case we need one later
4653 PerlIOMmap_fill(pTHX_ PerlIO *f)
4655 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4656 IV code = PerlIO_flush(f);
4657 if (code == 0 && !b->buf) {
4658 code = PerlIOMmap_map(aTHX_ f);
4660 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4661 code = PerlIOBuf_fill(aTHX_ f);
4667 PerlIOMmap_close(pTHX_ PerlIO *f)
4669 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4670 PerlIOBuf *b = &m->base;
4671 IV code = PerlIO_flush(f);
4675 b->ptr = b->end = b->buf;
4677 if (PerlIOBuf_close(aTHX_ f) != 0)
4683 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4685 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4689 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4690 sizeof(PerlIO_funcs),
4693 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4697 PerlIOBase_binmode, /* binmode */
4711 PerlIOBase_clearerr,
4712 PerlIOBase_setlinebuf,
4713 PerlIOMmap_get_base,
4717 PerlIOBuf_set_ptrcnt,
4720 #endif /* HAS_MMAP */
4723 Perl_PerlIO_stdin(pTHX)
4726 PerlIO_stdstreams(aTHX);
4728 return &PL_perlio[1];
4732 Perl_PerlIO_stdout(pTHX)
4735 PerlIO_stdstreams(aTHX);
4737 return &PL_perlio[2];
4741 Perl_PerlIO_stderr(pTHX)
4744 PerlIO_stdstreams(aTHX);
4746 return &PL_perlio[3];
4749 /*--------------------------------------------------------------------------------------*/
4752 PerlIO_getname(PerlIO *f, char *buf)
4757 bool exported = FALSE;
4758 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4760 stdio = PerlIO_exportFILE(f,0);
4764 name = fgetname(stdio, buf);
4765 if (exported) PerlIO_releaseFILE(f,stdio);
4770 PERL_UNUSED_ARG(buf);
4771 Perl_croak(aTHX_ "Don't know how to get file name");
4777 /*--------------------------------------------------------------------------------------*/
4779 * Functions which can be called on any kind of PerlIO implemented in
4783 #undef PerlIO_fdopen
4785 PerlIO_fdopen(int fd, const char *mode)
4788 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4793 PerlIO_open(const char *path, const char *mode)
4796 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4797 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4800 #undef Perlio_reopen
4802 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4805 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4806 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4811 PerlIO_getc(PerlIO *f)
4815 if ( 1 == PerlIO_read(f, buf, 1) ) {
4816 return (unsigned char) buf[0];
4821 #undef PerlIO_ungetc
4823 PerlIO_ungetc(PerlIO *f, int ch)
4828 if (PerlIO_unread(f, &buf, 1) == 1)
4836 PerlIO_putc(PerlIO *f, int ch)
4840 return PerlIO_write(f, &buf, 1);
4845 PerlIO_puts(PerlIO *f, const char *s)
4848 STRLEN len = strlen(s);
4849 return PerlIO_write(f, s, len);
4852 #undef PerlIO_rewind
4854 PerlIO_rewind(PerlIO *f)
4857 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4861 #undef PerlIO_vprintf
4863 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4866 SV *sv = newSVpvn("", 0);
4872 Perl_va_copy(ap, apc);
4873 sv_vcatpvf(sv, fmt, &apc);
4875 sv_vcatpvf(sv, fmt, &ap);
4877 s = SvPV_const(sv, len);
4878 wrote = PerlIO_write(f, s, len);
4883 #undef PerlIO_printf
4885 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4890 result = PerlIO_vprintf(f, fmt, ap);
4895 #undef PerlIO_stdoutf
4897 PerlIO_stdoutf(const char *fmt, ...)
4903 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4908 #undef PerlIO_tmpfile
4910 PerlIO_tmpfile(void)
4915 const int fd = win32_tmpfd();
4917 f = PerlIO_fdopen(fd, "w+b");
4919 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4920 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4922 * I have no idea how portable mkstemp() is ... NI-S
4924 const int fd = mkstemp(SvPVX(sv));
4926 f = PerlIO_fdopen(fd, "w+");
4928 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4929 PerlLIO_unlink(SvPVX_const(sv));
4932 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
4933 FILE * const stdio = PerlSIO_tmpfile();
4936 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
4937 PERLIO_FUNCS_CAST(&PerlIO_stdio),
4939 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
4945 # endif /* else HAS_MKSTEMP */
4946 #endif /* else WIN32 */
4953 #endif /* USE_SFIO */
4954 #endif /* PERLIO_IS_STDIO */
4956 /*======================================================================================*/
4958 * Now some functions in terms of above which may be needed even if we are
4959 * not in true PerlIO mode
4963 #undef PerlIO_setpos
4965 PerlIO_setpos(PerlIO *f, SV *pos)
4970 const Off_t * const posn = (Off_t *) SvPV(pos, len);
4971 if (f && len == sizeof(Off_t))
4972 return PerlIO_seek(f, *posn, SEEK_SET);
4974 SETERRNO(EINVAL, SS_IVCHAN);
4978 #undef PerlIO_setpos
4980 PerlIO_setpos(PerlIO *f, SV *pos)
4985 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
4986 if (f && len == sizeof(Fpos_t)) {
4987 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4988 return fsetpos64(f, fpos);
4990 return fsetpos(f, fpos);
4994 SETERRNO(EINVAL, SS_IVCHAN);
5000 #undef PerlIO_getpos
5002 PerlIO_getpos(PerlIO *f, SV *pos)
5005 Off_t posn = PerlIO_tell(f);
5006 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5007 return (posn == (Off_t) - 1) ? -1 : 0;
5010 #undef PerlIO_getpos
5012 PerlIO_getpos(PerlIO *f, SV *pos)
5017 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5018 code = fgetpos64(f, &fpos);
5020 code = fgetpos(f, &fpos);
5022 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5027 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5030 vprintf(char *pat, char *args)
5032 _doprnt(pat, args, stdout);
5033 return 0; /* wrong, but perl doesn't use the return
5038 vfprintf(FILE *fd, char *pat, char *args)
5040 _doprnt(pat, args, fd);
5041 return 0; /* wrong, but perl doesn't use the return
5047 #ifndef PerlIO_vsprintf
5049 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5052 const int val = vsprintf(s, fmt, ap);
5054 if (strlen(s) >= (STRLEN) n) {
5056 (void) PerlIO_puts(Perl_error_log,
5057 "panic: sprintf overflow - memory corrupted!\n");
5065 #ifndef PerlIO_sprintf
5067 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5072 result = PerlIO_vsprintf(s, n, fmt, ap);
5080 * c-indentation-style: bsd
5082 * indent-tabs-mode: t
5085 * ex: set ts=8 sts=4 sw=4 noet: