2 * perlio.c Copyright (c) 1996-2006, 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
33 # ifndef USE_CROSS_COMPILE
40 #define PERLIO_NOT_STDIO 0
41 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
47 * This file provides those parts of PerlIO abstraction
48 * which are not #defined in perlio.h.
49 * Which these are depends on various Configure #ifdef's
53 #define PERL_IN_PERLIO_C
56 #ifdef PERL_IMPLICIT_CONTEXT
64 /* Missing proto on LynxOS */
68 /* Call the callback or PerlIOBase, and return failure. */
69 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
70 if (PerlIOValid(f)) { \
71 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
72 if (tab && tab->callback) \
73 return (*tab->callback) args; \
75 return PerlIOBase_ ## base args; \
78 SETERRNO(EBADF, SS_IVCHAN); \
81 /* Call the callback or fail, and return failure. */
82 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
83 if (PerlIOValid(f)) { \
84 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
85 if (tab && tab->callback) \
86 return (*tab->callback) args; \
87 SETERRNO(EINVAL, LIB_INVARG); \
90 SETERRNO(EBADF, SS_IVCHAN); \
93 /* Call the callback or PerlIOBase, and be void. */
94 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
95 if (PerlIOValid(f)) { \
96 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
97 if (tab && tab->callback) \
98 (*tab->callback) args; \
100 PerlIOBase_ ## base args; \
103 SETERRNO(EBADF, SS_IVCHAN)
105 /* Call the callback or fail, and be void. */
106 #define Perl_PerlIO_or_fail_void(f, callback, args) \
107 if (PerlIOValid(f)) { \
108 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
109 if (tab && tab->callback) \
110 (*tab->callback) args; \
112 SETERRNO(EINVAL, LIB_INVARG); \
115 SETERRNO(EBADF, SS_IVCHAN)
119 perlsio_binmode(FILE *fp, int iotype, int mode)
122 * This used to be contents of do_binmode in doio.c
125 # if defined(atarist) || defined(__MINT__)
128 ((FILE *) fp)->_flag |= _IOBIN;
130 ((FILE *) fp)->_flag &= ~_IOBIN;
137 if (PerlLIO_setmode(fp, mode) != -1) {
139 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
141 # if defined(WIN32) && defined(__BORLANDC__)
143 * The translation mode of the stream is maintained independent
145 * the translation mode of the fd in the Borland RTL (heavy
146 * digging through their runtime sources reveal). User has to
148 * the mode explicitly for the stream (though they don't
150 * this anywhere). GSAR 97-5-24
156 fp->flags &= ~_F_BIN;
164 # if defined(USEMYBINMODE)
166 if (my_binmode(fp, iotype, mode) != FALSE)
172 PERL_UNUSED_ARG(iotype);
173 PERL_UNUSED_ARG(mode);
181 #define O_ACCMODE 3 /* Assume traditional implementation */
185 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
187 const int result = rawmode & O_ACCMODE;
192 ptype = IoTYPE_RDONLY;
195 ptype = IoTYPE_WRONLY;
203 *writing = (result != O_RDONLY);
205 if (result == O_RDONLY) {
209 else if (rawmode & O_APPEND) {
211 if (result != O_WRONLY)
216 if (result == O_WRONLY)
223 if (rawmode & O_BINARY)
229 #ifndef PERLIO_LAYERS
231 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
233 if (!names || !*names
234 || strEQ(names, ":crlf")
235 || strEQ(names, ":raw")
236 || strEQ(names, ":bytes")
240 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
248 PerlIO_destruct(pTHX)
253 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
256 PERL_UNUSED_ARG(iotype);
257 PERL_UNUSED_ARG(mode);
258 PERL_UNUSED_ARG(names);
261 return perlsio_binmode(fp, iotype, mode);
266 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
268 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
271 #ifdef PERL_IMPLICIT_SYS
272 return PerlSIO_fdupopen(f);
275 return win32_fdupopen(f);
278 const int fd = PerlLIO_dup(PerlIO_fileno(f));
282 const int omode = djgpp_get_stream_mode(f);
284 const int omode = fcntl(fd, F_GETFL);
286 PerlIO_intmode2str(omode,mode,NULL);
287 /* the r+ is a hack */
288 return PerlIO_fdopen(fd, mode);
293 SETERRNO(EBADF, SS_IVCHAN);
303 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
307 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
308 int imode, int perm, PerlIO *old, int narg, SV **args)
312 Perl_croak(aTHX_ "More than one argument to open");
314 if (*args == &PL_sv_undef)
315 return PerlIO_tmpfile();
317 const char *name = SvPV_nolen_const(*args);
318 if (*mode == IoTYPE_NUMERIC) {
319 fd = PerlLIO_open3(name, imode, perm);
321 return PerlIO_fdopen(fd, mode + 1);
324 return PerlIO_reopen(name, mode, old);
327 return PerlIO_open(name, mode);
332 return PerlIO_fdopen(fd, (char *) mode);
337 XS(XS_PerlIO__Layer__find)
341 Perl_croak(aTHX_ "Usage class->find(name[,load])");
343 const char * const name = SvPV_nolen_const(ST(1));
344 ST(0) = (strEQ(name, "crlf")
345 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
352 Perl_boot_core_PerlIO(pTHX)
354 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
360 #ifdef PERLIO_IS_STDIO
367 * Does nothing (yet) except force this file to be included in perl
368 * binary. That allows this file to force inclusion of other functions
369 * that may be required by loadable extensions e.g. for
370 * FileHandle::tmpfile
374 #undef PerlIO_tmpfile
381 #else /* PERLIO_IS_STDIO */
389 * This section is just to make sure these functions get pulled in from
393 #undef PerlIO_tmpfile
405 * Force this file to be included in perl binary. Which allows this
406 * file to force inclusion of other functions that may be required by
407 * loadable extensions e.g. for FileHandle::tmpfile
411 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
412 * results in a lot of lseek()s to regular files and lot of small
415 sfset(sfstdout, SF_SHARE, 0);
418 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
420 PerlIO_importFILE(FILE *stdio, const char *mode)
422 const int fd = fileno(stdio);
423 if (!mode || !*mode) {
426 return PerlIO_fdopen(fd, mode);
430 PerlIO_findFILE(PerlIO *pio)
432 const int fd = PerlIO_fileno(pio);
433 FILE * const f = fdopen(fd, "r+");
435 if (!f && errno == EINVAL)
437 if (!f && errno == EINVAL)
444 /*======================================================================================*/
446 * Implement all the PerlIO interface ourselves.
452 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
459 #include <sys/mman.h>
463 PerlIO_debug(const char *fmt, ...)
468 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
469 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
471 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
473 PL_perlio_debug_fd = -1;
475 if (PL_perlio_debug_fd > 0) {
478 const char * const s = CopFILE(PL_curcop);
479 /* Use fixed buffer as sv_catpvf etc. needs SVs */
481 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
482 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
483 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
485 const char *s = CopFILE(PL_curcop);
487 SV * const sv = newSVpvs("");
488 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
489 (IV) CopLINE(PL_curcop));
490 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
492 s = SvPV_const(sv, len);
493 PerlLIO_write(PL_perlio_debug_fd, s, len);
500 /*--------------------------------------------------------------------------------------*/
503 * Inner level routines
507 * Table of pointers to the PerlIO structs (malloc'ed)
509 #define PERLIO_TABLE_SIZE 64
512 PerlIO_allocate(pTHX)
516 * Find a free slot in the table, allocating new table as necessary
521 while ((f = *last)) {
523 last = (PerlIO **) (f);
524 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
530 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
538 #undef PerlIO_fdupopen
540 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
542 if (PerlIOValid(f)) {
543 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
544 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
546 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
548 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
552 SETERRNO(EBADF, SS_IVCHAN);
558 PerlIO_cleantable(pTHX_ PerlIO **tablep)
560 PerlIO * const table = *tablep;
563 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
564 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
565 PerlIO * const f = table + i;
577 PerlIO_list_alloc(pTHX)
581 Newxz(list, 1, PerlIO_list_t);
587 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
590 if (--list->refcnt == 0) {
593 for (i = 0; i < list->cur; i++) {
594 if (list->array[i].arg)
595 SvREFCNT_dec(list->array[i].arg);
597 Safefree(list->array);
605 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
611 if (list->cur >= list->len) {
614 Renew(list->array, list->len, PerlIO_pair_t);
616 Newx(list->array, list->len, PerlIO_pair_t);
618 p = &(list->array[list->cur++]);
620 if ((p->arg = arg)) {
621 SvREFCNT_inc_simple_void_NN(arg);
626 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
628 PerlIO_list_t *list = NULL;
631 list = PerlIO_list_alloc(aTHX);
632 for (i=0; i < proto->cur; i++) {
634 if (proto->array[i].arg)
635 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
636 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
643 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
646 PerlIO **table = &proto->Iperlio;
649 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
650 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
651 PerlIO_allocate(aTHX); /* root slot is never used */
652 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
653 while ((f = *table)) {
655 table = (PerlIO **) (f++);
656 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
658 (void) fp_dup(f, 0, param);
665 PERL_UNUSED_ARG(proto);
666 PERL_UNUSED_ARG(param);
671 PerlIO_destruct(pTHX)
674 PerlIO **table = &PL_perlio;
677 PerlIO_debug("Destruct %p\n",(void*)aTHX);
679 while ((f = *table)) {
681 table = (PerlIO **) (f++);
682 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
686 if (l->tab->kind & PERLIO_K_DESTRUCT) {
687 PerlIO_debug("Destruct popping %s\n", l->tab->name);
701 PerlIO_pop(pTHX_ PerlIO *f)
703 const PerlIOl *l = *f;
705 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
706 if (l->tab->Popped) {
708 * If popped returns non-zero do not free its layer structure
709 * it has either done so itself, or it is shared and still in
712 if ((*l->tab->Popped) (aTHX_ f) != 0)
720 /* Return as an array the stack of layers on a filehandle. Note that
721 * the stack is returned top-first in the array, and there are three
722 * times as many array elements as there are layers in the stack: the
723 * first element of a layer triplet is the name, the second one is the
724 * arguments, and the third one is the flags. */
727 PerlIO_get_layers(pTHX_ PerlIO *f)
730 AV * const av = newAV();
732 if (PerlIOValid(f)) {
733 PerlIOl *l = PerlIOBase(f);
736 SV * const name = l->tab && l->tab->name ?
737 newSVpv(l->tab->name, 0) : &PL_sv_undef;
738 SV * const arg = l->tab && l->tab->Getarg ?
739 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
742 av_push(av, newSViv((IV)l->flags));
750 /*--------------------------------------------------------------------------------------*/
752 * XS Interface for perl code
756 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
760 if ((SSize_t) len <= 0)
762 for (i = 0; i < PL_known_layers->cur; i++) {
763 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
764 if (memEQ(f->name, name, len) && f->name[len] == 0) {
765 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
769 if (load && PL_subname && PL_def_layerlist
770 && PL_def_layerlist->cur >= 2) {
771 if (PL_in_load_module) {
772 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
775 SV * const pkgsv = newSVpvs("PerlIO");
776 SV * const layer = newSVpvn(name, len);
777 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
779 SAVEINT(PL_in_load_module);
781 SAVEGENERICSV(PL_warnhook);
782 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
786 * The two SVs are magically freed by load_module
788 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
791 return PerlIO_find_layer(aTHX_ name, len, 0);
794 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
798 #ifdef USE_ATTRIBUTES_FOR_PERLIO
801 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
804 IO * const io = GvIOn((GV *) SvRV(sv));
805 PerlIO * const ifp = IoIFP(io);
806 PerlIO * const ofp = IoOFP(io);
807 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
813 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
816 IO * const io = GvIOn((GV *) SvRV(sv));
817 PerlIO * const ifp = IoIFP(io);
818 PerlIO * const ofp = IoOFP(io);
819 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
825 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
827 Perl_warn(aTHX_ "clear %" SVf, sv);
832 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
834 Perl_warn(aTHX_ "free %" SVf, sv);
838 MGVTBL perlio_vtab = {
846 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
849 SV * const sv = SvRV(ST(1));
850 AV * const av = newAV();
854 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
856 mg = mg_find(sv, PERL_MAGIC_ext);
857 mg->mg_virtual = &perlio_vtab;
859 Perl_warn(aTHX_ "attrib %" SVf, sv);
860 for (i = 2; i < items; i++) {
862 const char * const name = SvPV_const(ST(i), len);
863 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
865 av_push(av, SvREFCNT_inc_simple_NN(layer));
876 #endif /* USE_ATTIBUTES_FOR_PERLIO */
879 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
881 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
882 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
886 XS(XS_PerlIO__Layer__NoWarnings)
888 /* This is used as a %SIG{__WARN__} handler to supress warnings
889 during loading of layers.
894 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
898 XS(XS_PerlIO__Layer__find)
903 Perl_croak(aTHX_ "Usage class->find(name[,load])");
906 const char * const name = SvPV_const(ST(1), len);
907 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
908 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
910 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
917 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
920 if (!PL_known_layers)
921 PL_known_layers = PerlIO_list_alloc(aTHX);
922 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
923 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
927 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
931 const char *s = names;
933 while (isSPACE(*s) || *s == ':')
938 const char *as = NULL;
940 if (!isIDFIRST(*s)) {
942 * Message is consistent with how attribute lists are
943 * passed. Even though this means "foo : : bar" is
944 * seen as an invalid separator character.
946 const char q = ((*s == '\'') ? '"' : '\'');
947 if (ckWARN(WARN_LAYER))
948 Perl_warner(aTHX_ packWARN(WARN_LAYER),
949 "Invalid separator character %c%c%c in PerlIO layer specification %s",
951 SETERRNO(EINVAL, LIB_INVARG);
956 } while (isALNUM(*e));
972 * It's a nul terminated string, not allowed
973 * to \ the terminating null. Anything other
974 * character is passed over.
984 if (ckWARN(WARN_LAYER))
985 Perl_warner(aTHX_ packWARN(WARN_LAYER),
986 "Argument list not closed for PerlIO layer \"%.*s\"",
998 PerlIO_funcs * const layer =
999 PerlIO_find_layer(aTHX_ s, llen, 1);
1001 PerlIO_list_push(aTHX_ av, layer,
1007 if (ckWARN(WARN_LAYER))
1008 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1021 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1024 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1025 #ifdef PERLIO_USING_CRLF
1028 if (PerlIO_stdio.Set_ptrcnt)
1029 tab = &PerlIO_stdio;
1031 PerlIO_debug("Pushing %s\n", tab->name);
1032 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1037 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1039 return av->array[n].arg;
1043 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1045 if (n >= 0 && n < av->cur) {
1046 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1047 av->array[n].funcs->name);
1048 return av->array[n].funcs;
1051 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1056 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1058 PERL_UNUSED_ARG(mode);
1059 PERL_UNUSED_ARG(arg);
1060 PERL_UNUSED_ARG(tab);
1061 if (PerlIOValid(f)) {
1063 PerlIO_pop(aTHX_ f);
1069 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1070 sizeof(PerlIO_funcs),
1073 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1093 NULL, /* get_base */
1094 NULL, /* get_bufsiz */
1097 NULL, /* set_ptrcnt */
1101 PerlIO_default_layers(pTHX)
1104 if (!PL_def_layerlist) {
1105 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1106 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1107 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1108 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1110 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1112 osLayer = &PerlIO_win32;
1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1116 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1117 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1118 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1120 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1122 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1124 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1125 PerlIO_list_push(aTHX_ PL_def_layerlist,
1126 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1129 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1132 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1135 if (PL_def_layerlist->cur < 2) {
1136 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1138 return PL_def_layerlist;
1142 Perl_boot_core_PerlIO(pTHX)
1144 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1145 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1148 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1149 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1153 PerlIO_default_layer(pTHX_ I32 n)
1156 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1159 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1162 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1163 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1166 PerlIO_stdstreams(pTHX)
1170 PerlIO_allocate(aTHX);
1171 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1172 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1173 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1178 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1180 if (tab->fsize != sizeof(PerlIO_funcs)) {
1182 Perl_croak(aTHX_ "Layer does not match this perl");
1186 if (tab->size < sizeof(PerlIOl)) {
1189 /* Real layer with a data area */
1192 Newxz(temp, tab->size, char);
1196 l->tab = (PerlIO_funcs*) tab;
1198 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1199 (void*)f, tab->name,
1200 (mode) ? mode : "(Null)", (void*)arg);
1201 if (*l->tab->Pushed &&
1203 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1204 PerlIO_pop(aTHX_ f);
1213 /* Pseudo-layer where push does its own stack adjust */
1214 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1215 (mode) ? mode : "(Null)", (void*)arg);
1217 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1225 PerlIOBase_binmode(pTHX_ PerlIO *f)
1227 if (PerlIOValid(f)) {
1228 /* Is layer suitable for raw stream ? */
1229 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1230 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1231 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1234 /* Not suitable - pop it */
1235 PerlIO_pop(aTHX_ f);
1243 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1245 PERL_UNUSED_ARG(mode);
1246 PERL_UNUSED_ARG(arg);
1247 PERL_UNUSED_ARG(tab);
1249 if (PerlIOValid(f)) {
1254 * Strip all layers that are not suitable for a raw stream
1257 while (t && (l = *t)) {
1258 if (l->tab->Binmode) {
1259 /* Has a handler - normal case */
1260 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1262 /* Layer still there - move down a layer */
1271 /* No handler - pop it */
1272 PerlIO_pop(aTHX_ t);
1275 if (PerlIOValid(f)) {
1276 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1284 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1285 PerlIO_list_t *layers, IV n, IV max)
1289 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1291 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1302 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1306 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1307 code = PerlIO_parse_layers(aTHX_ layers, names);
1309 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1311 PerlIO_list_free(aTHX_ layers);
1317 /*--------------------------------------------------------------------------------------*/
1319 * Given the abstraction above the public API functions
1323 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1325 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1326 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1327 iotype, mode, (names) ? names : "(Null)");
1330 /* Do not flush etc. if (e.g.) switching encodings.
1331 if a pushed layer knows it needs to flush lower layers
1332 (for example :unix which is never going to call them)
1333 it can do the flush when it is pushed.
1335 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1338 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1339 #ifdef PERLIO_USING_CRLF
1340 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1341 O_BINARY so we can look for it in mode.
1343 if (!(mode & O_BINARY)) {
1345 /* FIXME?: Looking down the layer stack seems wrong,
1346 but is a way of reaching past (say) an encoding layer
1347 to flip CRLF-ness of the layer(s) below
1350 /* Perhaps we should turn on bottom-most aware layer
1351 e.g. Ilya's idea that UNIX TTY could serve
1353 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1354 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1355 /* Not in text mode - flush any pending stuff and flip it */
1357 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1359 /* Only need to turn it on in one layer so we are done */
1364 /* Not finding a CRLF aware layer presumably means we are binary
1365 which is not what was requested - so we failed
1366 We _could_ push :crlf layer but so could caller
1371 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1372 So code that used to be here is now in PerlIORaw_pushed().
1374 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1379 PerlIO__close(pTHX_ PerlIO *f)
1381 if (PerlIOValid(f)) {
1382 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1383 if (tab && tab->Close)
1384 return (*tab->Close)(aTHX_ f);
1386 return PerlIOBase_close(aTHX_ f);
1389 SETERRNO(EBADF, SS_IVCHAN);
1395 Perl_PerlIO_close(pTHX_ PerlIO *f)
1397 const int code = PerlIO__close(aTHX_ f);
1398 while (PerlIOValid(f)) {
1399 PerlIO_pop(aTHX_ f);
1405 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1408 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1412 static PerlIO_funcs *
1413 PerlIO_layer_from_ref(pTHX_ SV *sv)
1417 * For any scalar type load the handler which is bundled with perl
1419 if (SvTYPE(sv) < SVt_PVAV)
1420 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1423 * For other types allow if layer is known but don't try and load it
1425 switch (SvTYPE(sv)) {
1427 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1429 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1431 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1433 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1440 PerlIO_resolve_layers(pTHX_ const char *layers,
1441 const char *mode, int narg, SV **args)
1444 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1447 PerlIO_stdstreams(aTHX);
1449 SV * const arg = *args;
1451 * If it is a reference but not an object see if we have a handler
1454 if (SvROK(arg) && !sv_isobject(arg)) {
1455 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1457 def = PerlIO_list_alloc(aTHX);
1458 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1462 * Don't fail if handler cannot be found :via(...) etc. may do
1463 * something sensible else we will just stringfy and open
1468 if (!layers || !*layers)
1469 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1470 if (layers && *layers) {
1474 av = PerlIO_list_alloc(aTHX);
1475 for (i = 0; i < def->cur; i++) {
1476 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1483 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1487 PerlIO_list_free(aTHX_ av);
1499 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1500 int imode, int perm, PerlIO *f, int narg, SV **args)
1503 if (!f && narg == 1 && *args == &PL_sv_undef) {
1504 if ((f = PerlIO_tmpfile())) {
1505 if (!layers || !*layers)
1506 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1507 if (layers && *layers)
1508 PerlIO_apply_layers(aTHX_ f, mode, layers);
1512 PerlIO_list_t *layera;
1514 PerlIO_funcs *tab = NULL;
1515 if (PerlIOValid(f)) {
1517 * This is "reopen" - it is not tested as perl does not use it
1521 layera = PerlIO_list_alloc(aTHX);
1523 SV * const arg = (l->tab->Getarg)
1524 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1526 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1527 l = *PerlIONext(&l);
1531 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1537 * Start at "top" of layer stack
1539 n = layera->cur - 1;
1541 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1550 * Found that layer 'n' can do opens - call it
1552 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1553 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1555 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1556 tab->name, layers ? layers : "(Null)", mode, fd,
1557 imode, perm, (void*)f, narg, (void*)args);
1559 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1562 SETERRNO(EINVAL, LIB_INVARG);
1566 if (n + 1 < layera->cur) {
1568 * More layers above the one that we used to open -
1571 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1572 /* If pushing layers fails close the file */
1579 PerlIO_list_free(aTHX_ layera);
1586 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1588 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1592 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1594 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1598 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1600 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1604 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1606 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1610 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1612 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1616 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1621 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1623 if (tab && tab->Flush)
1624 return (*tab->Flush) (aTHX_ f);
1626 return 0; /* If no Flush defined, silently succeed. */
1629 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1630 SETERRNO(EBADF, SS_IVCHAN);
1636 * Is it good API design to do flush-all on NULL, a potentially
1637 * errorneous input? Maybe some magical value (PerlIO*
1638 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1639 * things on fflush(NULL), but should we be bound by their design
1642 PerlIO **table = &PL_perlio;
1644 while ((f = *table)) {
1646 table = (PerlIO **) (f++);
1647 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1648 if (*f && PerlIO_flush(f) != 0)
1658 PerlIOBase_flush_linebuf(pTHX)
1661 PerlIO **table = &PL_perlio;
1663 while ((f = *table)) {
1665 table = (PerlIO **) (f++);
1666 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1669 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1670 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1678 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1680 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1684 PerlIO_isutf8(PerlIO *f)
1687 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1689 SETERRNO(EBADF, SS_IVCHAN);
1695 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1697 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1701 Perl_PerlIO_error(pTHX_ PerlIO *f)
1703 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1707 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1709 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1713 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1715 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1719 PerlIO_has_base(PerlIO *f)
1721 if (PerlIOValid(f)) {
1722 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1725 return (tab->Get_base != NULL);
1726 SETERRNO(EINVAL, LIB_INVARG);
1729 SETERRNO(EBADF, SS_IVCHAN);
1735 PerlIO_fast_gets(PerlIO *f)
1737 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1738 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1741 return (tab->Set_ptrcnt != NULL);
1742 SETERRNO(EINVAL, LIB_INVARG);
1745 SETERRNO(EBADF, SS_IVCHAN);
1751 PerlIO_has_cntptr(PerlIO *f)
1753 if (PerlIOValid(f)) {
1754 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1757 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1758 SETERRNO(EINVAL, LIB_INVARG);
1761 SETERRNO(EBADF, SS_IVCHAN);
1767 PerlIO_canset_cnt(PerlIO *f)
1769 if (PerlIOValid(f)) {
1770 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1773 return (tab->Set_ptrcnt != NULL);
1774 SETERRNO(EINVAL, LIB_INVARG);
1777 SETERRNO(EBADF, SS_IVCHAN);
1783 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1785 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1789 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1791 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1795 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1797 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1801 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1803 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1807 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1809 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1813 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1815 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1819 /*--------------------------------------------------------------------------------------*/
1821 * utf8 and raw dummy layers
1825 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1827 PERL_UNUSED_CONTEXT;
1828 PERL_UNUSED_ARG(mode);
1829 PERL_UNUSED_ARG(arg);
1830 if (PerlIOValid(f)) {
1831 if (tab->kind & PERLIO_K_UTF8)
1832 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1834 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1840 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1841 sizeof(PerlIO_funcs),
1844 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1864 NULL, /* get_base */
1865 NULL, /* get_bufsiz */
1868 NULL, /* set_ptrcnt */
1871 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1872 sizeof(PerlIO_funcs),
1895 NULL, /* get_base */
1896 NULL, /* get_bufsiz */
1899 NULL, /* set_ptrcnt */
1903 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1904 IV n, const char *mode, int fd, int imode, int perm,
1905 PerlIO *old, int narg, SV **args)
1907 PerlIO_funcs * const tab = PerlIO_default_btm();
1908 PERL_UNUSED_ARG(self);
1909 if (tab && tab->Open)
1910 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1912 SETERRNO(EINVAL, LIB_INVARG);
1916 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1917 sizeof(PerlIO_funcs),
1940 NULL, /* get_base */
1941 NULL, /* get_bufsiz */
1944 NULL, /* set_ptrcnt */
1946 /*--------------------------------------------------------------------------------------*/
1947 /*--------------------------------------------------------------------------------------*/
1949 * "Methods" of the "base class"
1953 PerlIOBase_fileno(pTHX_ PerlIO *f)
1955 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1959 PerlIO_modestr(PerlIO * f, char *buf)
1962 if (PerlIOValid(f)) {
1963 const IV flags = PerlIOBase(f)->flags;
1964 if (flags & PERLIO_F_APPEND) {
1966 if (flags & PERLIO_F_CANREAD) {
1970 else if (flags & PERLIO_F_CANREAD) {
1972 if (flags & PERLIO_F_CANWRITE)
1975 else if (flags & PERLIO_F_CANWRITE) {
1977 if (flags & PERLIO_F_CANREAD) {
1981 #ifdef PERLIO_USING_CRLF
1982 if (!(flags & PERLIO_F_CRLF))
1992 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1994 PerlIOl * const l = PerlIOBase(f);
1995 PERL_UNUSED_CONTEXT;
1996 PERL_UNUSED_ARG(arg);
1998 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1999 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2000 if (tab->Set_ptrcnt != NULL)
2001 l->flags |= PERLIO_F_FASTGETS;
2003 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2007 l->flags |= PERLIO_F_CANREAD;
2010 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2013 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2016 SETERRNO(EINVAL, LIB_INVARG);
2022 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2025 l->flags &= ~PERLIO_F_CRLF;
2028 l->flags |= PERLIO_F_CRLF;
2031 SETERRNO(EINVAL, LIB_INVARG);
2038 l->flags |= l->next->flags &
2039 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2044 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2045 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2046 l->flags, PerlIO_modestr(f, temp));
2052 PerlIOBase_popped(pTHX_ PerlIO *f)
2054 PERL_UNUSED_CONTEXT;
2060 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2063 * Save the position as current head considers it
2065 const Off_t old = PerlIO_tell(f);
2066 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2067 PerlIOSelf(f, PerlIOBuf)->posn = old;
2068 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2072 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2074 STDCHAR *buf = (STDCHAR *) vbuf;
2076 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2077 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2078 SETERRNO(EBADF, SS_IVCHAN);
2084 SSize_t avail = PerlIO_get_cnt(f);
2087 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2089 STDCHAR *ptr = PerlIO_get_ptr(f);
2090 Copy(ptr, buf, take, STDCHAR);
2091 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2094 if (avail == 0) /* set_ptrcnt could have reset avail */
2097 if (count > 0 && avail <= 0) {
2098 if (PerlIO_fill(f) != 0)
2103 return (buf - (STDCHAR *) vbuf);
2109 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2111 PERL_UNUSED_CONTEXT;
2117 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2119 PERL_UNUSED_CONTEXT;
2125 PerlIOBase_close(pTHX_ PerlIO *f)
2128 if (PerlIOValid(f)) {
2129 PerlIO *n = PerlIONext(f);
2130 code = PerlIO_flush(f);
2131 PerlIOBase(f)->flags &=
2132 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2133 while (PerlIOValid(n)) {
2134 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2135 if (tab && tab->Close) {
2136 if ((*tab->Close)(aTHX_ n) != 0)
2141 PerlIOBase(n)->flags &=
2142 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2148 SETERRNO(EBADF, SS_IVCHAN);
2154 PerlIOBase_eof(pTHX_ PerlIO *f)
2156 PERL_UNUSED_CONTEXT;
2157 if (PerlIOValid(f)) {
2158 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2164 PerlIOBase_error(pTHX_ PerlIO *f)
2166 PERL_UNUSED_CONTEXT;
2167 if (PerlIOValid(f)) {
2168 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2174 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2176 if (PerlIOValid(f)) {
2177 PerlIO * const n = PerlIONext(f);
2178 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2185 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2187 PERL_UNUSED_CONTEXT;
2188 if (PerlIOValid(f)) {
2189 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2194 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2200 return sv_dup(arg, param);
2203 return newSVsv(arg);
2206 PERL_UNUSED_ARG(param);
2207 return newSVsv(arg);
2212 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2214 PerlIO * const nexto = PerlIONext(o);
2215 if (PerlIOValid(nexto)) {
2216 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2217 if (tab && tab->Dup)
2218 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2220 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2223 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2226 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2227 self->name, (void*)f, (void*)o, (void*)param);
2229 arg = (*self->Getarg)(aTHX_ o, param, flags);
2233 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2242 perl_mutex PerlIO_mutex;
2245 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2247 /* Must be called with PerlIO_mutex locked. */
2249 S_more_refcounted_fds(pTHX_ const int new_fd) {
2251 const int old_max = PL_perlio_fd_refcnt_size;
2252 const int new_max = 16 + (new_fd & ~15);
2255 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2256 old_max, new_fd, new_max);
2258 if (new_fd < old_max) {
2262 assert (new_max > new_fd);
2265 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2269 MUTEX_UNLOCK(&PerlIO_mutex);
2271 /* Can't use PerlIO to write as it allocates memory */
2272 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2273 PL_no_mem, strlen(PL_no_mem));
2277 PL_perlio_fd_refcnt_size = new_max;
2278 PL_perlio_fd_refcnt = new_array;
2280 PerlIO_debug("Zeroing %p, %d\n",
2281 (void*)(new_array + old_max),
2284 Zero(new_array + old_max, new_max - old_max, int);
2291 /* Place holder for stdstreams call ??? */
2293 MUTEX_INIT(&PerlIO_mutex);
2295 PERL_UNUSED_CONTEXT;
2300 PerlIOUnix_refcnt_inc(int fd)
2307 MUTEX_LOCK(&PerlIO_mutex);
2309 if (fd >= PL_perlio_fd_refcnt_size)
2310 S_more_refcounted_fds(aTHX_ fd);
2312 PL_perlio_fd_refcnt[fd]++;
2313 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2316 MUTEX_UNLOCK(&PerlIO_mutex);
2322 PerlIOUnix_refcnt_dec(int fd)
2329 MUTEX_LOCK(&PerlIO_mutex);
2331 /* XXX should this be a panic? */
2332 if (fd >= PL_perlio_fd_refcnt_size)
2333 S_more_refcounted_fds(aTHX_ fd);
2335 /* XXX should this be a panic if it drops below 0? */
2336 cnt = --PL_perlio_fd_refcnt[fd];
2337 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2339 MUTEX_UNLOCK(&PerlIO_mutex);
2346 PerlIO_cleanup(pTHX)
2351 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2353 PerlIO_debug("Cleanup layers\n");
2355 /* Raise STDIN..STDERR refcount so we don't close them */
2356 for (i=0; i < 3; i++)
2357 PerlIOUnix_refcnt_inc(i);
2358 PerlIO_cleantable(aTHX_ &PL_perlio);
2359 /* Restore STDIN..STDERR refcount */
2360 for (i=0; i < 3; i++)
2361 PerlIOUnix_refcnt_dec(i);
2363 if (PL_known_layers) {
2364 PerlIO_list_free(aTHX_ PL_known_layers);
2365 PL_known_layers = NULL;
2367 if (PL_def_layerlist) {
2368 PerlIO_list_free(aTHX_ PL_def_layerlist);
2369 PL_def_layerlist = NULL;
2375 /*--------------------------------------------------------------------------------------*/
2377 * Bottom-most level for UNIX-like case
2381 struct _PerlIO base; /* The generic part */
2382 int fd; /* UNIX like file descriptor */
2383 int oflags; /* open/fcntl flags */
2387 PerlIOUnix_oflags(const char *mode)
2390 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2395 if (*++mode == '+') {
2402 oflags = O_CREAT | O_TRUNC;
2403 if (*++mode == '+') {
2412 oflags = O_CREAT | O_APPEND;
2413 if (*++mode == '+') {
2426 else if (*mode == 't') {
2428 oflags &= ~O_BINARY;
2432 * Always open in binary mode
2435 if (*mode || oflags == -1) {
2436 SETERRNO(EINVAL, LIB_INVARG);
2443 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2445 PERL_UNUSED_CONTEXT;
2446 return PerlIOSelf(f, PerlIOUnix)->fd;
2450 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2452 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2455 if (PerlLIO_fstat(fd, &st) == 0) {
2456 if (!S_ISREG(st.st_mode)) {
2457 PerlIO_debug("%d is not regular file\n",fd);
2458 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2461 PerlIO_debug("%d _is_ a regular file\n",fd);
2467 PerlIOUnix_refcnt_inc(fd);
2468 PERL_UNUSED_CONTEXT;
2472 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2474 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2475 if (*PerlIONext(f)) {
2476 /* We never call down so do any pending stuff now */
2477 PerlIO_flush(PerlIONext(f));
2479 * XXX could (or should) we retrieve the oflags from the open file
2480 * handle rather than believing the "mode" we are passed in? XXX
2481 * Should the value on NULL mode be 0 or -1?
2483 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2484 mode ? PerlIOUnix_oflags(mode) : -1);
2486 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2492 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2494 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2496 PERL_UNUSED_CONTEXT;
2497 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2499 SETERRNO(ESPIPE, LIB_INVARG);
2501 SETERRNO(EINVAL, LIB_INVARG);
2505 new_loc = PerlLIO_lseek(fd, offset, whence);
2506 if (new_loc == (Off_t) - 1)
2508 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2513 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2514 IV n, const char *mode, int fd, int imode,
2515 int perm, PerlIO *f, int narg, SV **args)
2517 if (PerlIOValid(f)) {
2518 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2519 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2522 if (*mode == IoTYPE_NUMERIC)
2525 imode = PerlIOUnix_oflags(mode);
2529 const char *path = SvPV_nolen_const(*args);
2530 fd = PerlLIO_open3(path, imode, perm);
2534 if (*mode == IoTYPE_IMPLICIT)
2537 f = PerlIO_allocate(aTHX);
2539 if (!PerlIOValid(f)) {
2540 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2544 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2545 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2546 if (*mode == IoTYPE_APPEND)
2547 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2554 * FIXME: pop layers ???
2562 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2564 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2566 if (flags & PERLIO_DUP_FD) {
2567 fd = PerlLIO_dup(fd);
2570 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2572 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2573 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2582 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2585 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2586 #ifdef PERLIO_STD_SPECIAL
2588 return PERLIO_STD_IN(fd, vbuf, count);
2590 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2591 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2595 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2596 if (len >= 0 || errno != EINTR) {
2598 if (errno != EAGAIN) {
2599 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2602 else if (len == 0 && count != 0) {
2603 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2614 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2617 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2618 #ifdef PERLIO_STD_SPECIAL
2619 if (fd == 1 || fd == 2)
2620 return PERLIO_STD_OUT(fd, vbuf, count);
2623 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2624 if (len >= 0 || errno != EINTR) {
2626 if (errno != EAGAIN) {
2627 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2638 PerlIOUnix_tell(pTHX_ PerlIO *f)
2640 PERL_UNUSED_CONTEXT;
2642 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2647 PerlIOUnix_close(pTHX_ PerlIO *f)
2650 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2652 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2653 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2654 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2659 SETERRNO(EBADF,SS_IVCHAN);
2662 while (PerlLIO_close(fd) != 0) {
2663 if (errno != EINTR) {
2670 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2675 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2676 sizeof(PerlIO_funcs),
2683 PerlIOBase_binmode, /* binmode */
2693 PerlIOBase_noop_ok, /* flush */
2694 PerlIOBase_noop_fail, /* fill */
2697 PerlIOBase_clearerr,
2698 PerlIOBase_setlinebuf,
2699 NULL, /* get_base */
2700 NULL, /* get_bufsiz */
2703 NULL, /* set_ptrcnt */
2706 /*--------------------------------------------------------------------------------------*/
2711 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2712 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2713 broken by the last second glibc 2.3 fix
2715 #define STDIO_BUFFER_WRITABLE
2720 struct _PerlIO base;
2721 FILE *stdio; /* The stream */
2725 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2727 PERL_UNUSED_CONTEXT;
2729 if (PerlIOValid(f)) {
2730 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2732 return PerlSIO_fileno(s);
2739 PerlIOStdio_mode(const char *mode, char *tmode)
2741 char * const ret = tmode;
2747 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2755 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2758 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2759 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2760 if (toptab == tab) {
2761 /* Top is already stdio - pop self (duplicate) and use original */
2762 PerlIO_pop(aTHX_ f);
2765 const int fd = PerlIO_fileno(n);
2768 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2769 mode = PerlIOStdio_mode(mode, tmode)))) {
2770 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2771 /* We never call down so do any pending stuff now */
2772 PerlIO_flush(PerlIONext(f));
2779 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2784 PerlIO_importFILE(FILE *stdio, const char *mode)
2790 if (!mode || !*mode) {
2791 /* We need to probe to see how we can open the stream
2792 so start with read/write and then try write and read
2793 we dup() so that we can fclose without loosing the fd.
2795 Note that the errno value set by a failing fdopen
2796 varies between stdio implementations.
2798 const int fd = PerlLIO_dup(fileno(stdio));
2799 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2801 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2804 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2807 /* Don't seem to be able to open */
2813 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2814 s = PerlIOSelf(f, PerlIOStdio);
2822 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2823 IV n, const char *mode, int fd, int imode,
2824 int perm, PerlIO *f, int narg, SV **args)
2827 if (PerlIOValid(f)) {
2828 const char * const path = SvPV_nolen_const(*args);
2829 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2831 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2832 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2837 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2842 const char * const path = SvPV_nolen_const(*args);
2843 if (*mode == IoTYPE_NUMERIC) {
2845 fd = PerlLIO_open3(path, imode, perm);
2849 bool appended = FALSE;
2851 /* Cygwin wants its 'b' early. */
2853 mode = PerlIOStdio_mode(mode, tmode);
2855 stdio = PerlSIO_fopen(path, mode);
2858 f = PerlIO_allocate(aTHX);
2861 mode = PerlIOStdio_mode(mode, tmode);
2862 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2864 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2865 PerlIOUnix_refcnt_inc(fileno(stdio));
2867 PerlSIO_fclose(stdio);
2879 if (*mode == IoTYPE_IMPLICIT) {
2886 stdio = PerlSIO_stdin;
2889 stdio = PerlSIO_stdout;
2892 stdio = PerlSIO_stderr;
2897 stdio = PerlSIO_fdopen(fd, mode =
2898 PerlIOStdio_mode(mode, tmode));
2902 f = PerlIO_allocate(aTHX);
2904 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2905 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2906 PerlIOUnix_refcnt_inc(fileno(stdio));
2916 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2918 /* This assumes no layers underneath - which is what
2919 happens, but is not how I remember it. NI-S 2001/10/16
2921 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2922 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2923 const int fd = fileno(stdio);
2925 if (flags & PERLIO_DUP_FD) {
2926 const int dfd = PerlLIO_dup(fileno(stdio));
2928 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2933 /* FIXME: To avoid messy error recovery if dup fails
2934 re-use the existing stdio as though flag was not set
2938 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2940 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2941 PerlIOUnix_refcnt_inc(fileno(stdio));
2947 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2949 PERL_UNUSED_CONTEXT;
2951 /* XXX this could use PerlIO_canset_fileno() and
2952 * PerlIO_set_fileno() support from Configure
2954 # if defined(__UCLIBC__)
2955 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2958 # elif defined(__GLIBC__)
2959 /* There may be a better way for GLIBC:
2960 - libio.h defines a flag to not close() on cleanup
2964 # elif defined(__sun__)
2966 # elif defined(__hpux)
2970 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2971 your platform does not have special entry try this one.
2972 [For OSF only have confirmation for Tru64 (alpha)
2973 but assume other OSFs will be similar.]
2975 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2978 # elif defined(__FreeBSD__)
2979 /* There may be a better way on FreeBSD:
2980 - we could insert a dummy func in the _close function entry
2981 f->_close = (int (*)(void *)) dummy_close;
2985 # elif defined(__OpenBSD__)
2986 /* There may be a better way on OpenBSD:
2987 - we could insert a dummy func in the _close function entry
2988 f->_close = (int (*)(void *)) dummy_close;
2992 # elif defined(__EMX__)
2993 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2996 # elif defined(__CYGWIN__)
2997 /* There may be a better way on CYGWIN:
2998 - we could insert a dummy func in the _close function entry
2999 f->_close = (int (*)(void *)) dummy_close;
3003 # elif defined(WIN32)
3004 # if defined(__BORLANDC__)
3005 f->fd = PerlLIO_dup(fileno(f));
3006 # elif defined(UNDER_CE)
3007 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3016 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3017 (which isn't thread safe) instead
3019 # error "Don't know how to set FILE.fileno on your platform"
3027 PerlIOStdio_close(pTHX_ PerlIO *f)
3029 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3035 const int fd = fileno(stdio);
3040 #ifdef SOCKS5_VERSION_NAME
3041 /* Socks lib overrides close() but stdio isn't linked to
3042 that library (though we are) - so we must call close()
3043 on sockets on stdio's behalf.
3046 Sock_size_t optlen = sizeof(int);
3047 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3050 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3053 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3054 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3056 if (stdio == stdout || stdio == stderr)
3057 return PerlIO_flush(f);
3058 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3059 Use Sarathy's trick from maint-5.6 to invalidate the
3060 fileno slot of the FILE *
3062 result = PerlIO_flush(f);
3064 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3066 dupfd = PerlLIO_dup(fd);
3068 result = PerlSIO_fclose(stdio);
3069 /* We treat error from stdio as success if we invalidated
3070 errno may NOT be expected EBADF
3072 if (invalidate && result != 0) {
3076 #ifdef SOCKS5_VERSION_NAME
3077 /* in SOCKS' case, let close() determine return value */
3081 PerlLIO_dup2(dupfd,fd);
3082 PerlLIO_close(dupfd);
3089 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3092 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3096 STDCHAR *buf = (STDCHAR *) vbuf;
3098 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3099 * stdio does not do that for fread()
3101 const int ch = PerlSIO_fgetc(s);
3108 got = PerlSIO_fread(vbuf, 1, count, s);
3109 if (got == 0 && PerlSIO_ferror(s))
3111 if (got >= 0 || errno != EINTR)
3114 SETERRNO(0,0); /* just in case */
3120 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3123 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3125 #ifdef STDIO_BUFFER_WRITABLE
3126 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3127 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3128 STDCHAR *base = PerlIO_get_base(f);
3129 SSize_t cnt = PerlIO_get_cnt(f);
3130 STDCHAR *ptr = PerlIO_get_ptr(f);
3131 SSize_t avail = ptr - base;
3133 if (avail > count) {
3137 Move(buf-avail,ptr,avail,STDCHAR);
3140 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3141 if (PerlSIO_feof(s) && unread >= 0)
3142 PerlSIO_clearerr(s);
3147 if (PerlIO_has_cntptr(f)) {
3148 /* We can get pointer to buffer but not its base
3149 Do ungetc() but check chars are ending up in the
3152 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3153 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3155 const int ch = *--buf & 0xFF;
3156 if (ungetc(ch,s) != ch) {
3157 /* ungetc did not work */
3160 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3161 /* Did not change pointer as expected */
3162 fgetc(s); /* get char back again */
3172 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3178 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3183 got = PerlSIO_fwrite(vbuf, 1, count,
3184 PerlIOSelf(f, PerlIOStdio)->stdio);
3185 if (got >= 0 || errno != EINTR)
3188 SETERRNO(0,0); /* just in case */
3194 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3196 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3197 PERL_UNUSED_CONTEXT;
3199 return PerlSIO_fseek(stdio, offset, whence);
3203 PerlIOStdio_tell(pTHX_ PerlIO *f)
3205 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3206 PERL_UNUSED_CONTEXT;
3208 return PerlSIO_ftell(stdio);
3212 PerlIOStdio_flush(pTHX_ PerlIO *f)
3214 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3215 PERL_UNUSED_CONTEXT;
3217 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3218 return PerlSIO_fflush(stdio);
3224 * FIXME: This discards ungetc() and pre-read stuff which is not
3225 * right if this is just a "sync" from a layer above Suspect right
3226 * design is to do _this_ but not have layer above flush this
3227 * layer read-to-read
3230 * Not writeable - sync by attempting a seek
3232 const int err = errno;
3233 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3241 PerlIOStdio_eof(pTHX_ PerlIO *f)
3243 PERL_UNUSED_CONTEXT;
3245 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3249 PerlIOStdio_error(pTHX_ PerlIO *f)
3251 PERL_UNUSED_CONTEXT;
3253 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3257 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3259 PERL_UNUSED_CONTEXT;
3261 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3265 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3267 PERL_UNUSED_CONTEXT;
3269 #ifdef HAS_SETLINEBUF
3270 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3272 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3278 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3280 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3281 return (STDCHAR*)PerlSIO_get_base(stdio);
3285 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3287 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3288 return PerlSIO_get_bufsiz(stdio);
3292 #ifdef USE_STDIO_PTR
3294 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3296 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3297 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3301 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3303 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3304 return PerlSIO_get_cnt(stdio);
3308 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3310 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3312 #ifdef STDIO_PTR_LVALUE
3313 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3314 #ifdef STDIO_PTR_LVAL_SETS_CNT
3315 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3316 assert(PerlSIO_get_cnt(stdio) == (cnt));
3319 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3321 * Setting ptr _does_ change cnt - we are done
3325 #else /* STDIO_PTR_LVALUE */
3327 #endif /* STDIO_PTR_LVALUE */
3330 * Now (or only) set cnt
3332 #ifdef STDIO_CNT_LVALUE
3333 PerlSIO_set_cnt(stdio, cnt);
3334 #else /* STDIO_CNT_LVALUE */
3335 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3336 PerlSIO_set_ptr(stdio,
3337 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3339 #else /* STDIO_PTR_LVAL_SETS_CNT */
3341 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3342 #endif /* STDIO_CNT_LVALUE */
3349 PerlIOStdio_fill(pTHX_ PerlIO *f)
3351 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3353 PERL_UNUSED_CONTEXT;
3356 * fflush()ing read-only streams can cause trouble on some stdio-s
3358 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3359 if (PerlSIO_fflush(stdio) != 0)
3362 c = PerlSIO_fgetc(stdio);
3366 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3368 #ifdef STDIO_BUFFER_WRITABLE
3369 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3370 /* Fake ungetc() to the real buffer in case system's ungetc
3373 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3374 SSize_t cnt = PerlSIO_get_cnt(stdio);
3375 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3376 if (ptr == base+1) {
3377 *--ptr = (STDCHAR) c;
3378 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3379 if (PerlSIO_feof(stdio))
3380 PerlSIO_clearerr(stdio);
3386 if (PerlIO_has_cntptr(f)) {
3388 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3395 /* An ungetc()d char is handled separately from the regular
3396 * buffer, so we stuff it in the buffer ourselves.
3397 * Should never get called as should hit code above
3399 *(--((*stdio)->_ptr)) = (unsigned char) c;
3402 /* If buffer snoop scheme above fails fall back to
3405 if (PerlSIO_ungetc(c, stdio) != c)
3413 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3414 sizeof(PerlIO_funcs),
3416 sizeof(PerlIOStdio),
3417 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3421 PerlIOBase_binmode, /* binmode */
3435 PerlIOStdio_clearerr,
3436 PerlIOStdio_setlinebuf,
3438 PerlIOStdio_get_base,
3439 PerlIOStdio_get_bufsiz,
3444 #ifdef USE_STDIO_PTR
3445 PerlIOStdio_get_ptr,
3446 PerlIOStdio_get_cnt,
3447 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3448 PerlIOStdio_set_ptrcnt,
3451 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3456 #endif /* USE_STDIO_PTR */
3459 /* Note that calls to PerlIO_exportFILE() are reversed using
3460 * PerlIO_releaseFILE(), not importFILE. */
3462 PerlIO_exportFILE(PerlIO * f, const char *mode)
3466 if (PerlIOValid(f)) {
3469 if (!mode || !*mode) {
3470 mode = PerlIO_modestr(f, buf);
3472 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3476 /* De-link any lower layers so new :stdio sticks */
3478 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3479 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3481 /* Link previous lower layers under new one */
3485 /* restore layers list */
3495 PerlIO_findFILE(PerlIO *f)
3499 if (l->tab == &PerlIO_stdio) {
3500 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3503 l = *PerlIONext(&l);
3505 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3506 return PerlIO_exportFILE(f, NULL);
3509 /* Use this to reverse PerlIO_exportFILE calls. */
3511 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3516 if (l->tab == &PerlIO_stdio) {
3517 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3518 if (s->stdio == f) {
3520 PerlIO_pop(aTHX_ p);
3529 /*--------------------------------------------------------------------------------------*/
3531 * perlio buffer layer
3535 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3537 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3538 const int fd = PerlIO_fileno(f);
3539 if (fd >= 0 && PerlLIO_isatty(fd)) {
3540 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3542 if (*PerlIONext(f)) {
3543 const Off_t posn = PerlIO_tell(PerlIONext(f));
3544 if (posn != (Off_t) - 1) {
3548 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3552 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3553 IV n, const char *mode, int fd, int imode, int perm,
3554 PerlIO *f, int narg, SV **args)
3556 if (PerlIOValid(f)) {
3557 PerlIO *next = PerlIONext(f);
3559 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3560 if (tab && tab->Open)
3562 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3564 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3569 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3571 if (*mode == IoTYPE_IMPLICIT) {
3577 if (tab && tab->Open)
3578 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3581 SETERRNO(EINVAL, LIB_INVARG);
3583 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3585 * if push fails during open, open fails. close will pop us.
3590 fd = PerlIO_fileno(f);
3591 if (init && fd == 2) {
3593 * Initial stderr is unbuffered
3595 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3597 #ifdef PERLIO_USING_CRLF
3598 # ifdef PERLIO_IS_BINMODE_FD
3599 if (PERLIO_IS_BINMODE_FD(fd))
3600 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3604 * do something about failing setmode()? --jhi
3606 PerlLIO_setmode(fd, O_BINARY);
3615 * This "flush" is akin to sfio's sync in that it handles files in either
3616 * read or write state. For write state, we put the postponed data through
3617 * the next layers. For read state, we seek() the next layers to the
3618 * offset given by current position in the buffer, and discard the buffer
3619 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3620 * in any case?). Then the pass the stick further in chain.
3623 PerlIOBuf_flush(pTHX_ PerlIO *f)
3625 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3627 PerlIO *n = PerlIONext(f);
3628 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3630 * write() the buffer
3632 const STDCHAR *buf = b->buf;
3633 const STDCHAR *p = buf;
3634 while (p < b->ptr) {
3635 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3639 else if (count < 0 || PerlIO_error(n)) {
3640 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3645 b->posn += (p - buf);
3647 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3648 STDCHAR *buf = PerlIO_get_base(f);
3650 * Note position change
3652 b->posn += (b->ptr - buf);
3653 if (b->ptr < b->end) {
3654 /* We did not consume all of it - try and seek downstream to
3655 our logical position
3657 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3658 /* Reload n as some layers may pop themselves on seek */
3659 b->posn = PerlIO_tell(n = PerlIONext(f));
3662 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3663 data is lost for good - so return saying "ok" having undone
3666 b->posn -= (b->ptr - buf);
3671 b->ptr = b->end = b->buf;
3672 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3673 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3674 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3679 /* This discards the content of the buffer after b->ptr, and rereads
3680 * the buffer from the position off in the layer downstream; here off
3681 * is at offset corresponding to b->ptr - b->buf.
3684 PerlIOBuf_fill(pTHX_ PerlIO *f)
3686 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3687 PerlIO *n = PerlIONext(f);
3690 * Down-stream flush is defined not to loose read data so is harmless.
3691 * we would not normally be fill'ing if there was data left in anycase.
3693 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3695 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3696 PerlIOBase_flush_linebuf(aTHX);
3699 PerlIO_get_base(f); /* allocate via vtable */
3701 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3703 b->ptr = b->end = b->buf;
3705 if (!PerlIOValid(n)) {
3706 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3710 if (PerlIO_fast_gets(n)) {
3712 * Layer below is also buffered. We do _NOT_ want to call its
3713 * ->Read() because that will loop till it gets what we asked for
3714 * which may hang on a pipe etc. Instead take anything it has to
3715 * hand, or ask it to fill _once_.
3717 avail = PerlIO_get_cnt(n);
3719 avail = PerlIO_fill(n);
3721 avail = PerlIO_get_cnt(n);
3723 if (!PerlIO_error(n) && PerlIO_eof(n))
3728 STDCHAR *ptr = PerlIO_get_ptr(n);
3729 const SSize_t cnt = avail;
3730 if (avail > (SSize_t)b->bufsiz)
3732 Copy(ptr, b->buf, avail, STDCHAR);
3733 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3737 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3741 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3743 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3746 b->end = b->buf + avail;
3747 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3752 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3754 if (PerlIOValid(f)) {
3755 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3758 return PerlIOBase_read(aTHX_ f, vbuf, count);
3764 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3766 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3767 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3770 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3775 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3777 * Buffer is already a read buffer, we can overwrite any chars
3778 * which have been read back to buffer start
3780 avail = (b->ptr - b->buf);
3784 * Buffer is idle, set it up so whole buffer is available for
3788 b->end = b->buf + avail;
3790 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3792 * Buffer extends _back_ from where we are now
3794 b->posn -= b->bufsiz;
3796 if (avail > (SSize_t) count) {
3798 * If we have space for more than count, just move count
3806 * In simple stdio-like ungetc() case chars will be already
3809 if (buf != b->ptr) {
3810 Copy(buf, b->ptr, avail, STDCHAR);
3814 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3818 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3824 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3826 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3827 const STDCHAR *buf = (const STDCHAR *) vbuf;
3828 const STDCHAR *flushptr = buf;
3832 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3834 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3835 if (PerlIO_flush(f) != 0) {
3839 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3840 flushptr = buf + count;
3841 while (flushptr > buf && *(flushptr - 1) != '\n')
3845 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3846 if ((SSize_t) count < avail)
3848 if (flushptr > buf && flushptr <= buf + avail)
3849 avail = flushptr - buf;
3850 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3852 Copy(buf, b->ptr, avail, STDCHAR);
3857 if (buf == flushptr)
3860 if (b->ptr >= (b->buf + b->bufsiz))
3863 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3869 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3872 if ((code = PerlIO_flush(f)) == 0) {
3873 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3874 code = PerlIO_seek(PerlIONext(f), offset, whence);
3876 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3877 b->posn = PerlIO_tell(PerlIONext(f));
3884 PerlIOBuf_tell(pTHX_ PerlIO *f)
3886 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3888 * b->posn is file position where b->buf was read, or will be written
3890 Off_t posn = b->posn;
3891 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3892 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3894 /* As O_APPEND files are normally shared in some sense it is better
3899 /* when file is NOT shared then this is sufficient */
3900 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3902 posn = b->posn = PerlIO_tell(PerlIONext(f));
3906 * If buffer is valid adjust position by amount in buffer
3908 posn += (b->ptr - b->buf);
3914 PerlIOBuf_popped(pTHX_ PerlIO *f)
3916 const IV code = PerlIOBase_popped(aTHX_ f);
3917 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3918 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3921 b->ptr = b->end = b->buf = NULL;
3922 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3927 PerlIOBuf_close(pTHX_ PerlIO *f)
3929 const IV code = PerlIOBase_close(aTHX_ f);
3930 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3931 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3934 b->ptr = b->end = b->buf = NULL;
3935 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3940 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3942 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3949 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3951 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3954 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3955 return (b->end - b->ptr);
3960 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3962 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3963 PERL_UNUSED_CONTEXT;
3968 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3970 b->buf = (STDCHAR *) & b->oneword;
3971 b->bufsiz = sizeof(b->oneword);
3973 b->end = b->ptr = b->buf;
3979 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3981 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3984 return (b->end - b->buf);
3988 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3990 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3994 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3995 assert(PerlIO_get_cnt(f) == cnt);
3996 assert(b->ptr >= b->buf);
3998 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4002 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4004 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4009 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4010 sizeof(PerlIO_funcs),
4013 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4017 PerlIOBase_binmode, /* binmode */
4031 PerlIOBase_clearerr,
4032 PerlIOBase_setlinebuf,
4037 PerlIOBuf_set_ptrcnt,
4040 /*--------------------------------------------------------------------------------------*/
4042 * Temp layer to hold unread chars when cannot do it any other way
4046 PerlIOPending_fill(pTHX_ PerlIO *f)
4049 * Should never happen
4056 PerlIOPending_close(pTHX_ PerlIO *f)
4059 * A tad tricky - flush pops us, then we close new top
4062 return PerlIO_close(f);
4066 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4069 * A tad tricky - flush pops us, then we seek new top
4072 return PerlIO_seek(f, offset, whence);
4077 PerlIOPending_flush(pTHX_ PerlIO *f)
4079 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4080 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4084 PerlIO_pop(aTHX_ f);
4089 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4095 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4100 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4102 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4103 PerlIOl * const l = PerlIOBase(f);
4105 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4106 * etc. get muddled when it changes mid-string when we auto-pop.
4108 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4109 (PerlIOBase(PerlIONext(f))->
4110 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4115 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4117 SSize_t avail = PerlIO_get_cnt(f);
4119 if ((SSize_t)count < avail)
4122 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4123 if (got >= 0 && got < (SSize_t)count) {
4124 const SSize_t more =
4125 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4126 if (more >= 0 || got == 0)
4132 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4133 sizeof(PerlIO_funcs),
4136 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4137 PerlIOPending_pushed,
4140 PerlIOBase_binmode, /* binmode */
4149 PerlIOPending_close,
4150 PerlIOPending_flush,
4154 PerlIOBase_clearerr,
4155 PerlIOBase_setlinebuf,
4160 PerlIOPending_set_ptrcnt,
4165 /*--------------------------------------------------------------------------------------*/
4167 * crlf - translation On read translate CR,LF to "\n" we do this by
4168 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4169 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4171 * c->nl points on the first byte of CR LF pair when it is temporarily
4172 * replaced by LF, or to the last CR of the buffer. In the former case
4173 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4174 * that it ends at c->nl; these two cases can be distinguished by
4175 * *c->nl. c->nl is set during _getcnt() call, and unset during
4176 * _unread() and _flush() calls.
4177 * It only matters for read operations.
4181 PerlIOBuf base; /* PerlIOBuf stuff */
4182 STDCHAR *nl; /* Position of crlf we "lied" about in the
4187 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4190 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4191 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4193 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4194 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4195 PerlIOBase(f)->flags);
4198 /* Enable the first CRLF capable layer you can find, but if none
4199 * found, the one we just pushed is fine. This results in at
4200 * any given moment at most one CRLF-capable layer being enabled
4201 * in the whole layer stack. */
4202 PerlIO *g = PerlIONext(f);
4204 PerlIOl *b = PerlIOBase(g);
4205 if (b && b->tab == &PerlIO_crlf) {
4206 if (!(b->flags & PERLIO_F_CRLF))
4207 b->flags |= PERLIO_F_CRLF;
4208 PerlIO_pop(aTHX_ f);
4219 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4221 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4222 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4226 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4227 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4229 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4230 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4232 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4237 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4238 b->end = b->ptr = b->buf + b->bufsiz;
4239 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4240 b->posn -= b->bufsiz;
4242 while (count > 0 && b->ptr > b->buf) {
4243 const int ch = *--buf;
4245 if (b->ptr - 2 >= b->buf) {
4252 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4253 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4269 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4271 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4273 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4276 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4277 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4278 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4279 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4281 while (nl < b->end && *nl != 0xd)
4283 if (nl < b->end && *nl == 0xd) {
4285 if (nl + 1 < b->end) {
4292 * Not CR,LF but just CR
4300 * Blast - found CR as last char in buffer
4305 * They may not care, defer work as long as
4309 return (nl - b->ptr);
4313 b->ptr++; /* say we have read it as far as
4314 * flush() is concerned */
4315 b->buf++; /* Leave space in front of buffer */
4316 /* Note as we have moved buf up flush's
4318 will naturally make posn point at CR
4320 b->bufsiz--; /* Buffer is thus smaller */
4321 code = PerlIO_fill(f); /* Fetch some more */
4322 b->bufsiz++; /* Restore size for next time */
4323 b->buf--; /* Point at space */
4324 b->ptr = nl = b->buf; /* Which is what we hand
4326 *nl = 0xd; /* Fill in the CR */
4328 goto test; /* fill() call worked */
4330 * CR at EOF - just fall through
4332 /* Should we clear EOF though ??? */
4337 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4343 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4345 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4346 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4352 if (ptr == b->end && *c->nl == 0xd) {
4353 /* Defered CR at end of buffer case - we lied about count */
4366 * Test code - delete when it works ...
4368 IV flags = PerlIOBase(f)->flags;
4369 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4370 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4371 /* Defered CR at end of buffer case - we lied about count */
4377 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4378 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4386 * They have taken what we lied about
4394 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4398 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4400 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4401 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4403 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4404 const STDCHAR *buf = (const STDCHAR *) vbuf;
4405 const STDCHAR * const ebuf = buf + count;
4408 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4410 while (buf < ebuf) {
4411 const STDCHAR * const eptr = b->buf + b->bufsiz;
4412 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4413 while (buf < ebuf && b->ptr < eptr) {
4415 if ((b->ptr + 2) > eptr) {
4423 *(b->ptr)++ = 0xd; /* CR */
4424 *(b->ptr)++ = 0xa; /* LF */
4426 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4433 *(b->ptr)++ = *buf++;
4435 if (b->ptr >= eptr) {
4441 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4443 return (buf - (STDCHAR *) vbuf);
4448 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4450 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4455 return PerlIOBuf_flush(aTHX_ f);
4459 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4461 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4462 /* In text mode - flush any pending stuff and flip it */
4463 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4464 #ifndef PERLIO_USING_CRLF
4465 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4466 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4467 PerlIO_pop(aTHX_ f);
4474 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4475 sizeof(PerlIO_funcs),
4478 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4480 PerlIOBuf_popped, /* popped */
4482 PerlIOCrlf_binmode, /* binmode */
4486 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4487 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4488 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4496 PerlIOBase_clearerr,
4497 PerlIOBase_setlinebuf,
4502 PerlIOCrlf_set_ptrcnt,
4506 /*--------------------------------------------------------------------------------------*/
4508 * mmap as "buffer" layer
4512 PerlIOBuf base; /* PerlIOBuf stuff */
4513 Mmap_t mptr; /* Mapped address */
4514 Size_t len; /* mapped length */
4515 STDCHAR *bbuf; /* malloced buffer if map fails */
4519 PerlIOMmap_map(pTHX_ PerlIO *f)
4522 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4523 const IV flags = PerlIOBase(f)->flags;
4527 if (flags & PERLIO_F_CANREAD) {
4528 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4529 const int fd = PerlIO_fileno(f);
4531 code = Fstat(fd, &st);
4532 if (code == 0 && S_ISREG(st.st_mode)) {
4533 SSize_t len = st.st_size - b->posn;
4536 if (PL_mmap_page_size <= 0)
4537 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4541 * This is a hack - should never happen - open should
4544 b->posn = PerlIO_tell(PerlIONext(f));
4546 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4547 len = st.st_size - posn;
4548 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4549 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4550 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4551 madvise(m->mptr, len, MADV_SEQUENTIAL);
4553 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4554 madvise(m->mptr, len, MADV_WILLNEED);
4556 PerlIOBase(f)->flags =
4557 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4558 b->end = ((STDCHAR *) m->mptr) + len;
4559 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4568 PerlIOBase(f)->flags =
4569 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4571 b->ptr = b->end = b->ptr;
4580 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4582 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4585 PerlIOBuf * const b = &m->base;
4587 code = munmap(m->mptr, m->len);
4591 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4594 b->ptr = b->end = b->buf;
4595 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4601 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4603 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4604 PerlIOBuf * const b = &m->base;
4605 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4607 * Already have a readbuffer in progress
4613 * We have a write buffer or flushed PerlIOBuf read buffer
4615 m->bbuf = b->buf; /* save it in case we need it again */
4616 b->buf = NULL; /* Clear to trigger below */
4619 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4622 * Map did not work - recover PerlIOBuf buffer if we have one
4627 b->ptr = b->end = b->buf;
4630 return PerlIOBuf_get_base(aTHX_ f);
4634 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4636 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4637 PerlIOBuf * const b = &m->base;
4638 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4640 if (b->ptr && (b->ptr - count) >= b->buf
4641 && memEQ(b->ptr - count, vbuf, count)) {
4643 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4648 * Loose the unwritable mapped buffer
4652 * If flush took the "buffer" see if we have one from before
4654 if (!b->buf && m->bbuf)
4657 PerlIOBuf_get_base(aTHX_ f);
4661 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4665 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4667 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4668 PerlIOBuf * const b = &m->base;
4670 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4672 * No, or wrong sort of, buffer
4675 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4679 * If unmap took the "buffer" see if we have one from before
4681 if (!b->buf && m->bbuf)
4684 PerlIOBuf_get_base(aTHX_ f);
4688 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4692 PerlIOMmap_flush(pTHX_ PerlIO *f)
4694 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4695 PerlIOBuf * const b = &m->base;
4696 IV code = PerlIOBuf_flush(aTHX_ f);
4698 * Now we are "synced" at PerlIOBuf level
4705 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4710 * We seem to have a PerlIOBuf buffer which was not mapped
4711 * remember it in case we need one later
4720 PerlIOMmap_fill(pTHX_ PerlIO *f)
4722 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4723 IV code = PerlIO_flush(f);
4724 if (code == 0 && !b->buf) {
4725 code = PerlIOMmap_map(aTHX_ f);
4727 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4728 code = PerlIOBuf_fill(aTHX_ f);
4734 PerlIOMmap_close(pTHX_ PerlIO *f)
4736 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4737 PerlIOBuf * const b = &m->base;
4738 IV code = PerlIO_flush(f);
4742 b->ptr = b->end = b->buf;
4744 if (PerlIOBuf_close(aTHX_ f) != 0)
4750 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4752 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4756 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4757 sizeof(PerlIO_funcs),
4760 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4764 PerlIOBase_binmode, /* binmode */
4778 PerlIOBase_clearerr,
4779 PerlIOBase_setlinebuf,
4780 PerlIOMmap_get_base,
4784 PerlIOBuf_set_ptrcnt,
4787 #endif /* HAS_MMAP */
4790 Perl_PerlIO_stdin(pTHX)
4794 PerlIO_stdstreams(aTHX);
4796 return &PL_perlio[1];
4800 Perl_PerlIO_stdout(pTHX)
4804 PerlIO_stdstreams(aTHX);
4806 return &PL_perlio[2];
4810 Perl_PerlIO_stderr(pTHX)
4814 PerlIO_stdstreams(aTHX);
4816 return &PL_perlio[3];
4819 /*--------------------------------------------------------------------------------------*/
4822 PerlIO_getname(PerlIO *f, char *buf)
4827 bool exported = FALSE;
4828 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4830 stdio = PerlIO_exportFILE(f,0);
4834 name = fgetname(stdio, buf);
4835 if (exported) PerlIO_releaseFILE(f,stdio);
4840 PERL_UNUSED_ARG(buf);
4841 Perl_croak(aTHX_ "Don't know how to get file name");
4847 /*--------------------------------------------------------------------------------------*/
4849 * Functions which can be called on any kind of PerlIO implemented in
4853 #undef PerlIO_fdopen
4855 PerlIO_fdopen(int fd, const char *mode)
4858 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4863 PerlIO_open(const char *path, const char *mode)
4866 SV *name = sv_2mortal(newSVpv(path, 0));
4867 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4870 #undef Perlio_reopen
4872 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4875 SV *name = sv_2mortal(newSVpv(path,0));
4876 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4881 PerlIO_getc(PerlIO *f)
4885 if ( 1 == PerlIO_read(f, buf, 1) ) {
4886 return (unsigned char) buf[0];
4891 #undef PerlIO_ungetc
4893 PerlIO_ungetc(PerlIO *f, int ch)
4898 if (PerlIO_unread(f, &buf, 1) == 1)
4906 PerlIO_putc(PerlIO *f, int ch)
4910 return PerlIO_write(f, &buf, 1);
4915 PerlIO_puts(PerlIO *f, const char *s)
4918 return PerlIO_write(f, s, strlen(s));
4921 #undef PerlIO_rewind
4923 PerlIO_rewind(PerlIO *f)
4926 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4930 #undef PerlIO_vprintf
4932 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4935 SV * const sv = newSVpvs("");
4941 Perl_va_copy(ap, apc);
4942 sv_vcatpvf(sv, fmt, &apc);
4944 sv_vcatpvf(sv, fmt, &ap);
4946 s = SvPV_const(sv, len);
4947 wrote = PerlIO_write(f, s, len);
4952 #undef PerlIO_printf
4954 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4959 result = PerlIO_vprintf(f, fmt, ap);
4964 #undef PerlIO_stdoutf
4966 PerlIO_stdoutf(const char *fmt, ...)
4972 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4977 #undef PerlIO_tmpfile
4979 PerlIO_tmpfile(void)
4984 const int fd = win32_tmpfd();
4986 f = PerlIO_fdopen(fd, "w+b");
4988 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4989 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
4991 * I have no idea how portable mkstemp() is ... NI-S
4993 const int fd = mkstemp(SvPVX(sv));
4995 f = PerlIO_fdopen(fd, "w+");
4997 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4998 PerlLIO_unlink(SvPVX_const(sv));
5001 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5002 FILE * const stdio = PerlSIO_tmpfile();
5005 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5006 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5008 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5014 # endif /* else HAS_MKSTEMP */
5015 #endif /* else WIN32 */
5022 #endif /* USE_SFIO */
5023 #endif /* PERLIO_IS_STDIO */
5025 /*======================================================================================*/
5027 * Now some functions in terms of above which may be needed even if we are
5028 * not in true PerlIO mode
5031 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5034 const char *type = NULL;
5036 * Need to supply default layer info from open.pm
5038 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5040 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5045 type = SvPV_const(layers, len);
5046 if (type && mode && mode[0] != 'r') {
5048 * Skip to write part, which is separated by a '\0'
5050 STRLEN read_len = strlen(type);
5051 if (read_len < len) {
5052 type += read_len + 1;
5062 #undef PerlIO_setpos
5064 PerlIO_setpos(PerlIO *f, SV *pos)
5069 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5070 if (f && len == sizeof(Off_t))
5071 return PerlIO_seek(f, *posn, SEEK_SET);
5073 SETERRNO(EINVAL, SS_IVCHAN);
5077 #undef PerlIO_setpos
5079 PerlIO_setpos(PerlIO *f, SV *pos)
5084 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5085 if (f && len == sizeof(Fpos_t)) {
5086 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5087 return fsetpos64(f, fpos);
5089 return fsetpos(f, fpos);
5093 SETERRNO(EINVAL, SS_IVCHAN);
5099 #undef PerlIO_getpos
5101 PerlIO_getpos(PerlIO *f, SV *pos)
5104 Off_t posn = PerlIO_tell(f);
5105 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5106 return (posn == (Off_t) - 1) ? -1 : 0;
5109 #undef PerlIO_getpos
5111 PerlIO_getpos(PerlIO *f, SV *pos)
5116 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5117 code = fgetpos64(f, &fpos);
5119 code = fgetpos(f, &fpos);
5121 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5126 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5129 vprintf(char *pat, char *args)
5131 _doprnt(pat, args, stdout);
5132 return 0; /* wrong, but perl doesn't use the return
5137 vfprintf(FILE *fd, char *pat, char *args)
5139 _doprnt(pat, args, fd);
5140 return 0; /* wrong, but perl doesn't use the return
5146 #ifndef PerlIO_vsprintf
5148 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5151 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5152 PERL_UNUSED_CONTEXT;
5154 #ifndef PERL_MY_VSNPRINTF_GUARDED
5155 if (val < 0 || (n > 0 ? val >= n : 0)) {
5156 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5163 #ifndef PerlIO_sprintf
5165 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5170 result = PerlIO_vsprintf(s, n, fmt, ap);
5178 * c-indentation-style: bsd
5180 * indent-tabs-mode: t
5183 * ex: set ts=8 sts=4 sw=4 noet: