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);
1439 PerlIO_resolve_layers(pTHX_ const char *layers,
1440 const char *mode, int narg, SV **args)
1443 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1446 PerlIO_stdstreams(aTHX);
1448 SV * const arg = *args;
1450 * If it is a reference but not an object see if we have a handler
1453 if (SvROK(arg) && !sv_isobject(arg)) {
1454 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1456 def = PerlIO_list_alloc(aTHX);
1457 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1461 * Don't fail if handler cannot be found :via(...) etc. may do
1462 * something sensible else we will just stringfy and open
1467 if (!layers || !*layers)
1468 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1469 if (layers && *layers) {
1473 av = PerlIO_list_alloc(aTHX);
1474 for (i = 0; i < def->cur; i++) {
1475 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1482 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1486 PerlIO_list_free(aTHX_ av);
1498 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1499 int imode, int perm, PerlIO *f, int narg, SV **args)
1502 if (!f && narg == 1 && *args == &PL_sv_undef) {
1503 if ((f = PerlIO_tmpfile())) {
1504 if (!layers || !*layers)
1505 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1506 if (layers && *layers)
1507 PerlIO_apply_layers(aTHX_ f, mode, layers);
1511 PerlIO_list_t *layera;
1513 PerlIO_funcs *tab = NULL;
1514 if (PerlIOValid(f)) {
1516 * This is "reopen" - it is not tested as perl does not use it
1520 layera = PerlIO_list_alloc(aTHX);
1522 SV * const arg = (l->tab->Getarg)
1523 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1525 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1526 l = *PerlIONext(&l);
1530 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1536 * Start at "top" of layer stack
1538 n = layera->cur - 1;
1540 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1549 * Found that layer 'n' can do opens - call it
1551 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1552 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1554 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1555 tab->name, layers ? layers : "(Null)", mode, fd,
1556 imode, perm, (void*)f, narg, (void*)args);
1558 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1561 SETERRNO(EINVAL, LIB_INVARG);
1565 if (n + 1 < layera->cur) {
1567 * More layers above the one that we used to open -
1570 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1571 /* If pushing layers fails close the file */
1578 PerlIO_list_free(aTHX_ layera);
1585 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1587 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1591 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1593 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1597 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1599 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1603 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1605 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1609 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1611 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1615 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1620 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1622 if (tab && tab->Flush)
1623 return (*tab->Flush) (aTHX_ f);
1625 return 0; /* If no Flush defined, silently succeed. */
1628 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1629 SETERRNO(EBADF, SS_IVCHAN);
1635 * Is it good API design to do flush-all on NULL, a potentially
1636 * errorneous input? Maybe some magical value (PerlIO*
1637 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1638 * things on fflush(NULL), but should we be bound by their design
1641 PerlIO **table = &PL_perlio;
1643 while ((f = *table)) {
1645 table = (PerlIO **) (f++);
1646 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1647 if (*f && PerlIO_flush(f) != 0)
1657 PerlIOBase_flush_linebuf(pTHX)
1660 PerlIO **table = &PL_perlio;
1662 while ((f = *table)) {
1664 table = (PerlIO **) (f++);
1665 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1668 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1669 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1677 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1679 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1683 PerlIO_isutf8(PerlIO *f)
1686 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1688 SETERRNO(EBADF, SS_IVCHAN);
1694 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1696 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1700 Perl_PerlIO_error(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1706 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1712 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1714 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1718 PerlIO_has_base(PerlIO *f)
1720 if (PerlIOValid(f)) {
1721 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1724 return (tab->Get_base != NULL);
1725 SETERRNO(EINVAL, LIB_INVARG);
1728 SETERRNO(EBADF, SS_IVCHAN);
1734 PerlIO_fast_gets(PerlIO *f)
1736 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1737 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1740 return (tab->Set_ptrcnt != NULL);
1741 SETERRNO(EINVAL, LIB_INVARG);
1744 SETERRNO(EBADF, SS_IVCHAN);
1750 PerlIO_has_cntptr(PerlIO *f)
1752 if (PerlIOValid(f)) {
1753 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1756 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1757 SETERRNO(EINVAL, LIB_INVARG);
1760 SETERRNO(EBADF, SS_IVCHAN);
1766 PerlIO_canset_cnt(PerlIO *f)
1768 if (PerlIOValid(f)) {
1769 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1772 return (tab->Set_ptrcnt != NULL);
1773 SETERRNO(EINVAL, LIB_INVARG);
1776 SETERRNO(EBADF, SS_IVCHAN);
1782 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1784 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1788 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1790 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1794 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1796 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1800 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1802 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1806 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1808 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1812 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1814 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1818 /*--------------------------------------------------------------------------------------*/
1820 * utf8 and raw dummy layers
1824 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1826 PERL_UNUSED_CONTEXT;
1827 PERL_UNUSED_ARG(mode);
1828 PERL_UNUSED_ARG(arg);
1829 if (PerlIOValid(f)) {
1830 if (tab->kind & PERLIO_K_UTF8)
1831 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1833 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1839 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1840 sizeof(PerlIO_funcs),
1843 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1863 NULL, /* get_base */
1864 NULL, /* get_bufsiz */
1867 NULL, /* set_ptrcnt */
1870 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1871 sizeof(PerlIO_funcs),
1894 NULL, /* get_base */
1895 NULL, /* get_bufsiz */
1898 NULL, /* set_ptrcnt */
1902 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1903 IV n, const char *mode, int fd, int imode, int perm,
1904 PerlIO *old, int narg, SV **args)
1906 PerlIO_funcs * const tab = PerlIO_default_btm();
1907 PERL_UNUSED_ARG(self);
1908 if (tab && tab->Open)
1909 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1911 SETERRNO(EINVAL, LIB_INVARG);
1915 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1916 sizeof(PerlIO_funcs),
1939 NULL, /* get_base */
1940 NULL, /* get_bufsiz */
1943 NULL, /* set_ptrcnt */
1945 /*--------------------------------------------------------------------------------------*/
1946 /*--------------------------------------------------------------------------------------*/
1948 * "Methods" of the "base class"
1952 PerlIOBase_fileno(pTHX_ PerlIO *f)
1954 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1958 PerlIO_modestr(PerlIO * f, char *buf)
1961 if (PerlIOValid(f)) {
1962 const IV flags = PerlIOBase(f)->flags;
1963 if (flags & PERLIO_F_APPEND) {
1965 if (flags & PERLIO_F_CANREAD) {
1969 else if (flags & PERLIO_F_CANREAD) {
1971 if (flags & PERLIO_F_CANWRITE)
1974 else if (flags & PERLIO_F_CANWRITE) {
1976 if (flags & PERLIO_F_CANREAD) {
1980 #ifdef PERLIO_USING_CRLF
1981 if (!(flags & PERLIO_F_CRLF))
1991 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1993 PerlIOl * const l = PerlIOBase(f);
1994 PERL_UNUSED_CONTEXT;
1995 PERL_UNUSED_ARG(arg);
1997 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1998 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1999 if (tab->Set_ptrcnt != NULL)
2000 l->flags |= PERLIO_F_FASTGETS;
2002 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2006 l->flags |= PERLIO_F_CANREAD;
2009 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2012 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2015 SETERRNO(EINVAL, LIB_INVARG);
2021 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2024 l->flags &= ~PERLIO_F_CRLF;
2027 l->flags |= PERLIO_F_CRLF;
2030 SETERRNO(EINVAL, LIB_INVARG);
2037 l->flags |= l->next->flags &
2038 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2043 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2044 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2045 l->flags, PerlIO_modestr(f, temp));
2051 PerlIOBase_popped(pTHX_ PerlIO *f)
2053 PERL_UNUSED_CONTEXT;
2059 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2062 * Save the position as current head considers it
2064 const Off_t old = PerlIO_tell(f);
2065 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2066 PerlIOSelf(f, PerlIOBuf)->posn = old;
2067 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2071 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2073 STDCHAR *buf = (STDCHAR *) vbuf;
2075 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2076 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2077 SETERRNO(EBADF, SS_IVCHAN);
2083 SSize_t avail = PerlIO_get_cnt(f);
2086 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2088 STDCHAR *ptr = PerlIO_get_ptr(f);
2089 Copy(ptr, buf, take, STDCHAR);
2090 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2093 if (avail == 0) /* set_ptrcnt could have reset avail */
2096 if (count > 0 && avail <= 0) {
2097 if (PerlIO_fill(f) != 0)
2102 return (buf - (STDCHAR *) vbuf);
2108 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2110 PERL_UNUSED_CONTEXT;
2116 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2118 PERL_UNUSED_CONTEXT;
2124 PerlIOBase_close(pTHX_ PerlIO *f)
2127 if (PerlIOValid(f)) {
2128 PerlIO *n = PerlIONext(f);
2129 code = PerlIO_flush(f);
2130 PerlIOBase(f)->flags &=
2131 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2132 while (PerlIOValid(n)) {
2133 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2134 if (tab && tab->Close) {
2135 if ((*tab->Close)(aTHX_ n) != 0)
2140 PerlIOBase(n)->flags &=
2141 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2147 SETERRNO(EBADF, SS_IVCHAN);
2153 PerlIOBase_eof(pTHX_ PerlIO *f)
2155 PERL_UNUSED_CONTEXT;
2156 if (PerlIOValid(f)) {
2157 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2163 PerlIOBase_error(pTHX_ PerlIO *f)
2165 PERL_UNUSED_CONTEXT;
2166 if (PerlIOValid(f)) {
2167 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2173 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2175 if (PerlIOValid(f)) {
2176 PerlIO * const n = PerlIONext(f);
2177 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2184 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2186 PERL_UNUSED_CONTEXT;
2187 if (PerlIOValid(f)) {
2188 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2193 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2199 return sv_dup(arg, param);
2202 return newSVsv(arg);
2205 PERL_UNUSED_ARG(param);
2206 return newSVsv(arg);
2211 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2213 PerlIO * const nexto = PerlIONext(o);
2214 if (PerlIOValid(nexto)) {
2215 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2216 if (tab && tab->Dup)
2217 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2219 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2222 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2225 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2226 self->name, (void*)f, (void*)o, (void*)param);
2228 arg = (*self->Getarg)(aTHX_ o, param, flags);
2232 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2241 perl_mutex PerlIO_mutex;
2244 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2246 /* Must be called with PerlIO_mutex locked. */
2248 S_more_refcounted_fds(pTHX_ const int new_fd) {
2250 const int old_max = PL_perlio_fd_refcnt_size;
2251 const int new_max = 16 + (new_fd & ~15);
2254 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2255 old_max, new_fd, new_max);
2257 if (new_fd < old_max) {
2261 assert (new_max > new_fd);
2264 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2268 MUTEX_UNLOCK(&PerlIO_mutex);
2270 /* Can't use PerlIO to write as it allocates memory */
2271 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2272 PL_no_mem, strlen(PL_no_mem));
2276 PL_perlio_fd_refcnt_size = new_max;
2277 PL_perlio_fd_refcnt = new_array;
2279 PerlIO_debug("Zeroing %p, %d\n",
2280 (void*)(new_array + old_max),
2283 Zero(new_array + old_max, new_max - old_max, int);
2290 /* Place holder for stdstreams call ??? */
2292 MUTEX_INIT(&PerlIO_mutex);
2294 PERL_UNUSED_CONTEXT;
2299 PerlIOUnix_refcnt_inc(int fd)
2306 MUTEX_LOCK(&PerlIO_mutex);
2308 if (fd >= PL_perlio_fd_refcnt_size)
2309 S_more_refcounted_fds(aTHX_ fd);
2311 PL_perlio_fd_refcnt[fd]++;
2312 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2315 MUTEX_UNLOCK(&PerlIO_mutex);
2321 PerlIOUnix_refcnt_dec(int fd)
2328 MUTEX_LOCK(&PerlIO_mutex);
2330 /* XXX should this be a panic? */
2331 if (fd >= PL_perlio_fd_refcnt_size)
2332 S_more_refcounted_fds(aTHX_ fd);
2334 /* XXX should this be a panic if it drops below 0? */
2335 cnt = --PL_perlio_fd_refcnt[fd];
2336 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2338 MUTEX_UNLOCK(&PerlIO_mutex);
2345 PerlIO_cleanup(pTHX)
2350 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2352 PerlIO_debug("Cleanup layers\n");
2354 /* Raise STDIN..STDERR refcount so we don't close them */
2355 for (i=0; i < 3; i++)
2356 PerlIOUnix_refcnt_inc(i);
2357 PerlIO_cleantable(aTHX_ &PL_perlio);
2358 /* Restore STDIN..STDERR refcount */
2359 for (i=0; i < 3; i++)
2360 PerlIOUnix_refcnt_dec(i);
2362 if (PL_known_layers) {
2363 PerlIO_list_free(aTHX_ PL_known_layers);
2364 PL_known_layers = NULL;
2366 if (PL_def_layerlist) {
2367 PerlIO_list_free(aTHX_ PL_def_layerlist);
2368 PL_def_layerlist = NULL;
2371 Safefree(PL_perlio_fd_refcnt);
2376 /*--------------------------------------------------------------------------------------*/
2378 * Bottom-most level for UNIX-like case
2382 struct _PerlIO base; /* The generic part */
2383 int fd; /* UNIX like file descriptor */
2384 int oflags; /* open/fcntl flags */
2388 PerlIOUnix_oflags(const char *mode)
2391 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2396 if (*++mode == '+') {
2403 oflags = O_CREAT | O_TRUNC;
2404 if (*++mode == '+') {
2413 oflags = O_CREAT | O_APPEND;
2414 if (*++mode == '+') {
2427 else if (*mode == 't') {
2429 oflags &= ~O_BINARY;
2433 * Always open in binary mode
2436 if (*mode || oflags == -1) {
2437 SETERRNO(EINVAL, LIB_INVARG);
2444 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2446 PERL_UNUSED_CONTEXT;
2447 return PerlIOSelf(f, PerlIOUnix)->fd;
2451 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2453 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2456 if (PerlLIO_fstat(fd, &st) == 0) {
2457 if (!S_ISREG(st.st_mode)) {
2458 PerlIO_debug("%d is not regular file\n",fd);
2459 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2462 PerlIO_debug("%d _is_ a regular file\n",fd);
2468 PerlIOUnix_refcnt_inc(fd);
2469 PERL_UNUSED_CONTEXT;
2473 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2475 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2476 if (*PerlIONext(f)) {
2477 /* We never call down so do any pending stuff now */
2478 PerlIO_flush(PerlIONext(f));
2480 * XXX could (or should) we retrieve the oflags from the open file
2481 * handle rather than believing the "mode" we are passed in? XXX
2482 * Should the value on NULL mode be 0 or -1?
2484 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2485 mode ? PerlIOUnix_oflags(mode) : -1);
2487 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2493 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2495 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2497 PERL_UNUSED_CONTEXT;
2498 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2500 SETERRNO(ESPIPE, LIB_INVARG);
2502 SETERRNO(EINVAL, LIB_INVARG);
2506 new_loc = PerlLIO_lseek(fd, offset, whence);
2507 if (new_loc == (Off_t) - 1)
2509 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2514 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2515 IV n, const char *mode, int fd, int imode,
2516 int perm, PerlIO *f, int narg, SV **args)
2518 if (PerlIOValid(f)) {
2519 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2520 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2523 if (*mode == IoTYPE_NUMERIC)
2526 imode = PerlIOUnix_oflags(mode);
2530 const char *path = SvPV_nolen_const(*args);
2531 fd = PerlLIO_open3(path, imode, perm);
2535 if (*mode == IoTYPE_IMPLICIT)
2538 f = PerlIO_allocate(aTHX);
2540 if (!PerlIOValid(f)) {
2541 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2545 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2546 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2547 if (*mode == IoTYPE_APPEND)
2548 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2555 * FIXME: pop layers ???
2563 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2565 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2567 if (flags & PERLIO_DUP_FD) {
2568 fd = PerlLIO_dup(fd);
2571 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2573 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2574 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2583 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2586 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2587 #ifdef PERLIO_STD_SPECIAL
2589 return PERLIO_STD_IN(fd, vbuf, count);
2591 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2592 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2596 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2597 if (len >= 0 || errno != EINTR) {
2599 if (errno != EAGAIN) {
2600 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2603 else if (len == 0 && count != 0) {
2604 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2615 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2618 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2619 #ifdef PERLIO_STD_SPECIAL
2620 if (fd == 1 || fd == 2)
2621 return PERLIO_STD_OUT(fd, vbuf, count);
2624 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2625 if (len >= 0 || errno != EINTR) {
2627 if (errno != EAGAIN) {
2628 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2639 PerlIOUnix_tell(pTHX_ PerlIO *f)
2641 PERL_UNUSED_CONTEXT;
2643 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2648 PerlIOUnix_close(pTHX_ PerlIO *f)
2651 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2653 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2654 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2655 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2660 SETERRNO(EBADF,SS_IVCHAN);
2663 while (PerlLIO_close(fd) != 0) {
2664 if (errno != EINTR) {
2671 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2676 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2677 sizeof(PerlIO_funcs),
2684 PerlIOBase_binmode, /* binmode */
2694 PerlIOBase_noop_ok, /* flush */
2695 PerlIOBase_noop_fail, /* fill */
2698 PerlIOBase_clearerr,
2699 PerlIOBase_setlinebuf,
2700 NULL, /* get_base */
2701 NULL, /* get_bufsiz */
2704 NULL, /* set_ptrcnt */
2707 /*--------------------------------------------------------------------------------------*/
2712 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2713 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2714 broken by the last second glibc 2.3 fix
2716 #define STDIO_BUFFER_WRITABLE
2721 struct _PerlIO base;
2722 FILE *stdio; /* The stream */
2726 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2728 PERL_UNUSED_CONTEXT;
2730 if (PerlIOValid(f)) {
2731 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2733 return PerlSIO_fileno(s);
2740 PerlIOStdio_mode(const char *mode, char *tmode)
2742 char * const ret = tmode;
2748 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2756 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2759 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2760 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2761 if (toptab == tab) {
2762 /* Top is already stdio - pop self (duplicate) and use original */
2763 PerlIO_pop(aTHX_ f);
2766 const int fd = PerlIO_fileno(n);
2769 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2770 mode = PerlIOStdio_mode(mode, tmode)))) {
2771 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2772 /* We never call down so do any pending stuff now */
2773 PerlIO_flush(PerlIONext(f));
2780 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2785 PerlIO_importFILE(FILE *stdio, const char *mode)
2791 if (!mode || !*mode) {
2792 /* We need to probe to see how we can open the stream
2793 so start with read/write and then try write and read
2794 we dup() so that we can fclose without loosing the fd.
2796 Note that the errno value set by a failing fdopen
2797 varies between stdio implementations.
2799 const int fd = PerlLIO_dup(fileno(stdio));
2800 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2802 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2805 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2808 /* Don't seem to be able to open */
2814 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2815 s = PerlIOSelf(f, PerlIOStdio);
2823 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2824 IV n, const char *mode, int fd, int imode,
2825 int perm, PerlIO *f, int narg, SV **args)
2828 if (PerlIOValid(f)) {
2829 const char * const path = SvPV_nolen_const(*args);
2830 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2832 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2833 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2838 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2843 const char * const path = SvPV_nolen_const(*args);
2844 if (*mode == IoTYPE_NUMERIC) {
2846 fd = PerlLIO_open3(path, imode, perm);
2850 bool appended = FALSE;
2852 /* Cygwin wants its 'b' early. */
2854 mode = PerlIOStdio_mode(mode, tmode);
2856 stdio = PerlSIO_fopen(path, mode);
2859 f = PerlIO_allocate(aTHX);
2862 mode = PerlIOStdio_mode(mode, tmode);
2863 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2865 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2866 PerlIOUnix_refcnt_inc(fileno(stdio));
2868 PerlSIO_fclose(stdio);
2880 if (*mode == IoTYPE_IMPLICIT) {
2887 stdio = PerlSIO_stdin;
2890 stdio = PerlSIO_stdout;
2893 stdio = PerlSIO_stderr;
2898 stdio = PerlSIO_fdopen(fd, mode =
2899 PerlIOStdio_mode(mode, tmode));
2903 f = PerlIO_allocate(aTHX);
2905 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2906 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2907 PerlIOUnix_refcnt_inc(fileno(stdio));
2917 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2919 /* This assumes no layers underneath - which is what
2920 happens, but is not how I remember it. NI-S 2001/10/16
2922 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2923 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2924 const int fd = fileno(stdio);
2926 if (flags & PERLIO_DUP_FD) {
2927 const int dfd = PerlLIO_dup(fileno(stdio));
2929 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2934 /* FIXME: To avoid messy error recovery if dup fails
2935 re-use the existing stdio as though flag was not set
2939 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2941 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2942 PerlIOUnix_refcnt_inc(fileno(stdio));
2948 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2950 PERL_UNUSED_CONTEXT;
2952 /* XXX this could use PerlIO_canset_fileno() and
2953 * PerlIO_set_fileno() support from Configure
2955 # if defined(__UCLIBC__)
2956 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2959 # elif defined(__GLIBC__)
2960 /* There may be a better way for GLIBC:
2961 - libio.h defines a flag to not close() on cleanup
2965 # elif defined(__sun__)
2967 # elif defined(__hpux)
2971 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2972 your platform does not have special entry try this one.
2973 [For OSF only have confirmation for Tru64 (alpha)
2974 but assume other OSFs will be similar.]
2976 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2979 # elif defined(__FreeBSD__)
2980 /* There may be a better way on FreeBSD:
2981 - we could insert a dummy func in the _close function entry
2982 f->_close = (int (*)(void *)) dummy_close;
2986 # elif defined(__OpenBSD__)
2987 /* There may be a better way on OpenBSD:
2988 - we could insert a dummy func in the _close function entry
2989 f->_close = (int (*)(void *)) dummy_close;
2993 # elif defined(__EMX__)
2994 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2997 # elif defined(__CYGWIN__)
2998 /* There may be a better way on CYGWIN:
2999 - we could insert a dummy func in the _close function entry
3000 f->_close = (int (*)(void *)) dummy_close;
3004 # elif defined(WIN32)
3005 # if defined(__BORLANDC__)
3006 f->fd = PerlLIO_dup(fileno(f));
3007 # elif defined(UNDER_CE)
3008 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3017 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3018 (which isn't thread safe) instead
3020 # error "Don't know how to set FILE.fileno on your platform"
3028 PerlIOStdio_close(pTHX_ PerlIO *f)
3030 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3036 const int fd = fileno(stdio);
3041 #ifdef SOCKS5_VERSION_NAME
3042 /* Socks lib overrides close() but stdio isn't linked to
3043 that library (though we are) - so we must call close()
3044 on sockets on stdio's behalf.
3047 Sock_size_t optlen = sizeof(int);
3048 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3051 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3054 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3055 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3057 if (stdio == stdout || stdio == stderr)
3058 return PerlIO_flush(f);
3059 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3060 Use Sarathy's trick from maint-5.6 to invalidate the
3061 fileno slot of the FILE *
3063 result = PerlIO_flush(f);
3065 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3067 dupfd = PerlLIO_dup(fd);
3069 result = PerlSIO_fclose(stdio);
3070 /* We treat error from stdio as success if we invalidated
3071 errno may NOT be expected EBADF
3073 if (invalidate && result != 0) {
3077 #ifdef SOCKS5_VERSION_NAME
3078 /* in SOCKS' case, let close() determine return value */
3082 PerlLIO_dup2(dupfd,fd);
3083 PerlLIO_close(dupfd);
3090 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3093 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3097 STDCHAR *buf = (STDCHAR *) vbuf;
3099 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3100 * stdio does not do that for fread()
3102 const int ch = PerlSIO_fgetc(s);
3109 got = PerlSIO_fread(vbuf, 1, count, s);
3110 if (got == 0 && PerlSIO_ferror(s))
3112 if (got >= 0 || errno != EINTR)
3115 SETERRNO(0,0); /* just in case */
3121 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3124 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3126 #ifdef STDIO_BUFFER_WRITABLE
3127 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3128 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3129 STDCHAR *base = PerlIO_get_base(f);
3130 SSize_t cnt = PerlIO_get_cnt(f);
3131 STDCHAR *ptr = PerlIO_get_ptr(f);
3132 SSize_t avail = ptr - base;
3134 if (avail > count) {
3138 Move(buf-avail,ptr,avail,STDCHAR);
3141 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3142 if (PerlSIO_feof(s) && unread >= 0)
3143 PerlSIO_clearerr(s);
3148 if (PerlIO_has_cntptr(f)) {
3149 /* We can get pointer to buffer but not its base
3150 Do ungetc() but check chars are ending up in the
3153 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3154 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3156 const int ch = *--buf & 0xFF;
3157 if (ungetc(ch,s) != ch) {
3158 /* ungetc did not work */
3161 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3162 /* Did not change pointer as expected */
3163 fgetc(s); /* get char back again */
3173 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3179 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3184 got = PerlSIO_fwrite(vbuf, 1, count,
3185 PerlIOSelf(f, PerlIOStdio)->stdio);
3186 if (got >= 0 || errno != EINTR)
3189 SETERRNO(0,0); /* just in case */
3195 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3197 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3198 PERL_UNUSED_CONTEXT;
3200 return PerlSIO_fseek(stdio, offset, whence);
3204 PerlIOStdio_tell(pTHX_ PerlIO *f)
3206 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3207 PERL_UNUSED_CONTEXT;
3209 return PerlSIO_ftell(stdio);
3213 PerlIOStdio_flush(pTHX_ PerlIO *f)
3215 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3216 PERL_UNUSED_CONTEXT;
3218 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3219 return PerlSIO_fflush(stdio);
3225 * FIXME: This discards ungetc() and pre-read stuff which is not
3226 * right if this is just a "sync" from a layer above Suspect right
3227 * design is to do _this_ but not have layer above flush this
3228 * layer read-to-read
3231 * Not writeable - sync by attempting a seek
3233 const int err = errno;
3234 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3242 PerlIOStdio_eof(pTHX_ PerlIO *f)
3244 PERL_UNUSED_CONTEXT;
3246 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3250 PerlIOStdio_error(pTHX_ PerlIO *f)
3252 PERL_UNUSED_CONTEXT;
3254 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3258 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3260 PERL_UNUSED_CONTEXT;
3262 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3266 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3268 PERL_UNUSED_CONTEXT;
3270 #ifdef HAS_SETLINEBUF
3271 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3273 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3279 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3281 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3282 return (STDCHAR*)PerlSIO_get_base(stdio);
3286 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3288 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3289 return PerlSIO_get_bufsiz(stdio);
3293 #ifdef USE_STDIO_PTR
3295 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3297 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3298 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3302 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3304 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3305 return PerlSIO_get_cnt(stdio);
3309 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3311 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3313 #ifdef STDIO_PTR_LVALUE
3314 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3315 #ifdef STDIO_PTR_LVAL_SETS_CNT
3316 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3317 assert(PerlSIO_get_cnt(stdio) == (cnt));
3320 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3322 * Setting ptr _does_ change cnt - we are done
3326 #else /* STDIO_PTR_LVALUE */
3328 #endif /* STDIO_PTR_LVALUE */
3331 * Now (or only) set cnt
3333 #ifdef STDIO_CNT_LVALUE
3334 PerlSIO_set_cnt(stdio, cnt);
3335 #else /* STDIO_CNT_LVALUE */
3336 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3337 PerlSIO_set_ptr(stdio,
3338 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3340 #else /* STDIO_PTR_LVAL_SETS_CNT */
3342 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3343 #endif /* STDIO_CNT_LVALUE */
3350 PerlIOStdio_fill(pTHX_ PerlIO *f)
3352 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3354 PERL_UNUSED_CONTEXT;
3357 * fflush()ing read-only streams can cause trouble on some stdio-s
3359 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3360 if (PerlSIO_fflush(stdio) != 0)
3363 c = PerlSIO_fgetc(stdio);
3367 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3369 #ifdef STDIO_BUFFER_WRITABLE
3370 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3371 /* Fake ungetc() to the real buffer in case system's ungetc
3374 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3375 SSize_t cnt = PerlSIO_get_cnt(stdio);
3376 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3377 if (ptr == base+1) {
3378 *--ptr = (STDCHAR) c;
3379 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3380 if (PerlSIO_feof(stdio))
3381 PerlSIO_clearerr(stdio);
3387 if (PerlIO_has_cntptr(f)) {
3389 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3396 /* An ungetc()d char is handled separately from the regular
3397 * buffer, so we stuff it in the buffer ourselves.
3398 * Should never get called as should hit code above
3400 *(--((*stdio)->_ptr)) = (unsigned char) c;
3403 /* If buffer snoop scheme above fails fall back to
3406 if (PerlSIO_ungetc(c, stdio) != c)
3414 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3415 sizeof(PerlIO_funcs),
3417 sizeof(PerlIOStdio),
3418 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3422 PerlIOBase_binmode, /* binmode */
3436 PerlIOStdio_clearerr,
3437 PerlIOStdio_setlinebuf,
3439 PerlIOStdio_get_base,
3440 PerlIOStdio_get_bufsiz,
3445 #ifdef USE_STDIO_PTR
3446 PerlIOStdio_get_ptr,
3447 PerlIOStdio_get_cnt,
3448 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3449 PerlIOStdio_set_ptrcnt,
3452 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3457 #endif /* USE_STDIO_PTR */
3460 /* Note that calls to PerlIO_exportFILE() are reversed using
3461 * PerlIO_releaseFILE(), not importFILE. */
3463 PerlIO_exportFILE(PerlIO * f, const char *mode)
3467 if (PerlIOValid(f)) {
3470 if (!mode || !*mode) {
3471 mode = PerlIO_modestr(f, buf);
3473 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3477 /* De-link any lower layers so new :stdio sticks */
3479 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3480 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3482 /* Link previous lower layers under new one */
3486 /* restore layers list */
3496 PerlIO_findFILE(PerlIO *f)
3500 if (l->tab == &PerlIO_stdio) {
3501 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3504 l = *PerlIONext(&l);
3506 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3507 return PerlIO_exportFILE(f, NULL);
3510 /* Use this to reverse PerlIO_exportFILE calls. */
3512 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3517 if (l->tab == &PerlIO_stdio) {
3518 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3519 if (s->stdio == f) {
3521 PerlIO_pop(aTHX_ p);
3530 /*--------------------------------------------------------------------------------------*/
3532 * perlio buffer layer
3536 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3538 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3539 const int fd = PerlIO_fileno(f);
3540 if (fd >= 0 && PerlLIO_isatty(fd)) {
3541 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3543 if (*PerlIONext(f)) {
3544 const Off_t posn = PerlIO_tell(PerlIONext(f));
3545 if (posn != (Off_t) - 1) {
3549 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3553 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3554 IV n, const char *mode, int fd, int imode, int perm,
3555 PerlIO *f, int narg, SV **args)
3557 if (PerlIOValid(f)) {
3558 PerlIO *next = PerlIONext(f);
3560 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3561 if (tab && tab->Open)
3563 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3565 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3570 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3572 if (*mode == IoTYPE_IMPLICIT) {
3578 if (tab && tab->Open)
3579 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3582 SETERRNO(EINVAL, LIB_INVARG);
3584 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3586 * if push fails during open, open fails. close will pop us.
3591 fd = PerlIO_fileno(f);
3592 if (init && fd == 2) {
3594 * Initial stderr is unbuffered
3596 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3598 #ifdef PERLIO_USING_CRLF
3599 # ifdef PERLIO_IS_BINMODE_FD
3600 if (PERLIO_IS_BINMODE_FD(fd))
3601 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3605 * do something about failing setmode()? --jhi
3607 PerlLIO_setmode(fd, O_BINARY);
3616 * This "flush" is akin to sfio's sync in that it handles files in either
3617 * read or write state. For write state, we put the postponed data through
3618 * the next layers. For read state, we seek() the next layers to the
3619 * offset given by current position in the buffer, and discard the buffer
3620 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3621 * in any case?). Then the pass the stick further in chain.
3624 PerlIOBuf_flush(pTHX_ PerlIO *f)
3626 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3628 PerlIO *n = PerlIONext(f);
3629 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3631 * write() the buffer
3633 const STDCHAR *buf = b->buf;
3634 const STDCHAR *p = buf;
3635 while (p < b->ptr) {
3636 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3640 else if (count < 0 || PerlIO_error(n)) {
3641 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3646 b->posn += (p - buf);
3648 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3649 STDCHAR *buf = PerlIO_get_base(f);
3651 * Note position change
3653 b->posn += (b->ptr - buf);
3654 if (b->ptr < b->end) {
3655 /* We did not consume all of it - try and seek downstream to
3656 our logical position
3658 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3659 /* Reload n as some layers may pop themselves on seek */
3660 b->posn = PerlIO_tell(n = PerlIONext(f));
3663 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3664 data is lost for good - so return saying "ok" having undone
3667 b->posn -= (b->ptr - buf);
3672 b->ptr = b->end = b->buf;
3673 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3674 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3675 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3680 /* This discards the content of the buffer after b->ptr, and rereads
3681 * the buffer from the position off in the layer downstream; here off
3682 * is at offset corresponding to b->ptr - b->buf.
3685 PerlIOBuf_fill(pTHX_ PerlIO *f)
3687 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3688 PerlIO *n = PerlIONext(f);
3691 * Down-stream flush is defined not to loose read data so is harmless.
3692 * we would not normally be fill'ing if there was data left in anycase.
3694 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3696 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3697 PerlIOBase_flush_linebuf(aTHX);
3700 PerlIO_get_base(f); /* allocate via vtable */
3702 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3704 b->ptr = b->end = b->buf;
3706 if (!PerlIOValid(n)) {
3707 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3711 if (PerlIO_fast_gets(n)) {
3713 * Layer below is also buffered. We do _NOT_ want to call its
3714 * ->Read() because that will loop till it gets what we asked for
3715 * which may hang on a pipe etc. Instead take anything it has to
3716 * hand, or ask it to fill _once_.
3718 avail = PerlIO_get_cnt(n);
3720 avail = PerlIO_fill(n);
3722 avail = PerlIO_get_cnt(n);
3724 if (!PerlIO_error(n) && PerlIO_eof(n))
3729 STDCHAR *ptr = PerlIO_get_ptr(n);
3730 const SSize_t cnt = avail;
3731 if (avail > (SSize_t)b->bufsiz)
3733 Copy(ptr, b->buf, avail, STDCHAR);
3734 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3738 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3742 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3744 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3747 b->end = b->buf + avail;
3748 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3753 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3755 if (PerlIOValid(f)) {
3756 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3759 return PerlIOBase_read(aTHX_ f, vbuf, count);
3765 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3767 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3768 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3771 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3776 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3778 * Buffer is already a read buffer, we can overwrite any chars
3779 * which have been read back to buffer start
3781 avail = (b->ptr - b->buf);
3785 * Buffer is idle, set it up so whole buffer is available for
3789 b->end = b->buf + avail;
3791 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3793 * Buffer extends _back_ from where we are now
3795 b->posn -= b->bufsiz;
3797 if (avail > (SSize_t) count) {
3799 * If we have space for more than count, just move count
3807 * In simple stdio-like ungetc() case chars will be already
3810 if (buf != b->ptr) {
3811 Copy(buf, b->ptr, avail, STDCHAR);
3815 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3819 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3825 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3827 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3828 const STDCHAR *buf = (const STDCHAR *) vbuf;
3829 const STDCHAR *flushptr = buf;
3833 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3835 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3836 if (PerlIO_flush(f) != 0) {
3840 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3841 flushptr = buf + count;
3842 while (flushptr > buf && *(flushptr - 1) != '\n')
3846 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3847 if ((SSize_t) count < avail)
3849 if (flushptr > buf && flushptr <= buf + avail)
3850 avail = flushptr - buf;
3851 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3853 Copy(buf, b->ptr, avail, STDCHAR);
3858 if (buf == flushptr)
3861 if (b->ptr >= (b->buf + b->bufsiz))
3864 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3870 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3873 if ((code = PerlIO_flush(f)) == 0) {
3874 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3875 code = PerlIO_seek(PerlIONext(f), offset, whence);
3877 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3878 b->posn = PerlIO_tell(PerlIONext(f));
3885 PerlIOBuf_tell(pTHX_ PerlIO *f)
3887 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3889 * b->posn is file position where b->buf was read, or will be written
3891 Off_t posn = b->posn;
3892 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3893 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3895 /* As O_APPEND files are normally shared in some sense it is better
3900 /* when file is NOT shared then this is sufficient */
3901 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3903 posn = b->posn = PerlIO_tell(PerlIONext(f));
3907 * If buffer is valid adjust position by amount in buffer
3909 posn += (b->ptr - b->buf);
3915 PerlIOBuf_popped(pTHX_ PerlIO *f)
3917 const IV code = PerlIOBase_popped(aTHX_ f);
3918 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3919 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3922 b->ptr = b->end = b->buf = NULL;
3923 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3928 PerlIOBuf_close(pTHX_ PerlIO *f)
3930 const IV code = PerlIOBase_close(aTHX_ f);
3931 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3932 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3935 b->ptr = b->end = b->buf = NULL;
3936 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3941 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3943 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3950 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3952 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3955 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3956 return (b->end - b->ptr);
3961 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3963 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3964 PERL_UNUSED_CONTEXT;
3969 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3971 b->buf = (STDCHAR *) & b->oneword;
3972 b->bufsiz = sizeof(b->oneword);
3974 b->end = b->ptr = b->buf;
3980 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3982 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3985 return (b->end - b->buf);
3989 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3991 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3995 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3996 assert(PerlIO_get_cnt(f) == cnt);
3997 assert(b->ptr >= b->buf);
3999 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4003 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4005 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4010 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4011 sizeof(PerlIO_funcs),
4014 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4018 PerlIOBase_binmode, /* binmode */
4032 PerlIOBase_clearerr,
4033 PerlIOBase_setlinebuf,
4038 PerlIOBuf_set_ptrcnt,
4041 /*--------------------------------------------------------------------------------------*/
4043 * Temp layer to hold unread chars when cannot do it any other way
4047 PerlIOPending_fill(pTHX_ PerlIO *f)
4050 * Should never happen
4057 PerlIOPending_close(pTHX_ PerlIO *f)
4060 * A tad tricky - flush pops us, then we close new top
4063 return PerlIO_close(f);
4067 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4070 * A tad tricky - flush pops us, then we seek new top
4073 return PerlIO_seek(f, offset, whence);
4078 PerlIOPending_flush(pTHX_ PerlIO *f)
4080 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4081 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4085 PerlIO_pop(aTHX_ f);
4090 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4096 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4101 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4103 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4104 PerlIOl * const l = PerlIOBase(f);
4106 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4107 * etc. get muddled when it changes mid-string when we auto-pop.
4109 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4110 (PerlIOBase(PerlIONext(f))->
4111 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4116 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4118 SSize_t avail = PerlIO_get_cnt(f);
4120 if ((SSize_t)count < avail)
4123 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4124 if (got >= 0 && got < (SSize_t)count) {
4125 const SSize_t more =
4126 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4127 if (more >= 0 || got == 0)
4133 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4134 sizeof(PerlIO_funcs),
4137 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4138 PerlIOPending_pushed,
4141 PerlIOBase_binmode, /* binmode */
4150 PerlIOPending_close,
4151 PerlIOPending_flush,
4155 PerlIOBase_clearerr,
4156 PerlIOBase_setlinebuf,
4161 PerlIOPending_set_ptrcnt,
4166 /*--------------------------------------------------------------------------------------*/
4168 * crlf - translation On read translate CR,LF to "\n" we do this by
4169 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4170 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4172 * c->nl points on the first byte of CR LF pair when it is temporarily
4173 * replaced by LF, or to the last CR of the buffer. In the former case
4174 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4175 * that it ends at c->nl; these two cases can be distinguished by
4176 * *c->nl. c->nl is set during _getcnt() call, and unset during
4177 * _unread() and _flush() calls.
4178 * It only matters for read operations.
4182 PerlIOBuf base; /* PerlIOBuf stuff */
4183 STDCHAR *nl; /* Position of crlf we "lied" about in the
4188 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4191 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4192 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4194 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4195 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4196 PerlIOBase(f)->flags);
4199 /* Enable the first CRLF capable layer you can find, but if none
4200 * found, the one we just pushed is fine. This results in at
4201 * any given moment at most one CRLF-capable layer being enabled
4202 * in the whole layer stack. */
4203 PerlIO *g = PerlIONext(f);
4205 PerlIOl *b = PerlIOBase(g);
4206 if (b && b->tab == &PerlIO_crlf) {
4207 if (!(b->flags & PERLIO_F_CRLF))
4208 b->flags |= PERLIO_F_CRLF;
4209 PerlIO_pop(aTHX_ f);
4220 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4222 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4223 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4227 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4228 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4230 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4231 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4233 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4238 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4239 b->end = b->ptr = b->buf + b->bufsiz;
4240 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4241 b->posn -= b->bufsiz;
4243 while (count > 0 && b->ptr > b->buf) {
4244 const int ch = *--buf;
4246 if (b->ptr - 2 >= b->buf) {
4253 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4254 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4270 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4272 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4274 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4277 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4278 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4279 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4280 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4282 while (nl < b->end && *nl != 0xd)
4284 if (nl < b->end && *nl == 0xd) {
4286 if (nl + 1 < b->end) {
4293 * Not CR,LF but just CR
4301 * Blast - found CR as last char in buffer
4306 * They may not care, defer work as long as
4310 return (nl - b->ptr);
4314 b->ptr++; /* say we have read it as far as
4315 * flush() is concerned */
4316 b->buf++; /* Leave space in front of buffer */
4317 /* Note as we have moved buf up flush's
4319 will naturally make posn point at CR
4321 b->bufsiz--; /* Buffer is thus smaller */
4322 code = PerlIO_fill(f); /* Fetch some more */
4323 b->bufsiz++; /* Restore size for next time */
4324 b->buf--; /* Point at space */
4325 b->ptr = nl = b->buf; /* Which is what we hand
4327 *nl = 0xd; /* Fill in the CR */
4329 goto test; /* fill() call worked */
4331 * CR at EOF - just fall through
4333 /* Should we clear EOF though ??? */
4338 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4344 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4346 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4347 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4353 if (ptr == b->end && *c->nl == 0xd) {
4354 /* Defered CR at end of buffer case - we lied about count */
4367 * Test code - delete when it works ...
4369 IV flags = PerlIOBase(f)->flags;
4370 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4371 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4372 /* Defered CR at end of buffer case - we lied about count */
4378 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4379 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4387 * They have taken what we lied about
4395 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4399 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4401 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4402 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4404 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4405 const STDCHAR *buf = (const STDCHAR *) vbuf;
4406 const STDCHAR * const ebuf = buf + count;
4409 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4411 while (buf < ebuf) {
4412 const STDCHAR * const eptr = b->buf + b->bufsiz;
4413 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4414 while (buf < ebuf && b->ptr < eptr) {
4416 if ((b->ptr + 2) > eptr) {
4424 *(b->ptr)++ = 0xd; /* CR */
4425 *(b->ptr)++ = 0xa; /* LF */
4427 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4434 *(b->ptr)++ = *buf++;
4436 if (b->ptr >= eptr) {
4442 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4444 return (buf - (STDCHAR *) vbuf);
4449 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4451 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4456 return PerlIOBuf_flush(aTHX_ f);
4460 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4462 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4463 /* In text mode - flush any pending stuff and flip it */
4464 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4465 #ifndef PERLIO_USING_CRLF
4466 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4467 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4468 PerlIO_pop(aTHX_ f);
4475 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4476 sizeof(PerlIO_funcs),
4479 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4481 PerlIOBuf_popped, /* popped */
4483 PerlIOCrlf_binmode, /* binmode */
4487 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4488 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4489 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4497 PerlIOBase_clearerr,
4498 PerlIOBase_setlinebuf,
4503 PerlIOCrlf_set_ptrcnt,
4507 /*--------------------------------------------------------------------------------------*/
4509 * mmap as "buffer" layer
4513 PerlIOBuf base; /* PerlIOBuf stuff */
4514 Mmap_t mptr; /* Mapped address */
4515 Size_t len; /* mapped length */
4516 STDCHAR *bbuf; /* malloced buffer if map fails */
4520 PerlIOMmap_map(pTHX_ PerlIO *f)
4523 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4524 const IV flags = PerlIOBase(f)->flags;
4528 if (flags & PERLIO_F_CANREAD) {
4529 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4530 const int fd = PerlIO_fileno(f);
4532 code = Fstat(fd, &st);
4533 if (code == 0 && S_ISREG(st.st_mode)) {
4534 SSize_t len = st.st_size - b->posn;
4537 if (PL_mmap_page_size <= 0)
4538 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4542 * This is a hack - should never happen - open should
4545 b->posn = PerlIO_tell(PerlIONext(f));
4547 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4548 len = st.st_size - posn;
4549 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4550 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4551 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4552 madvise(m->mptr, len, MADV_SEQUENTIAL);
4554 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4555 madvise(m->mptr, len, MADV_WILLNEED);
4557 PerlIOBase(f)->flags =
4558 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4559 b->end = ((STDCHAR *) m->mptr) + len;
4560 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4569 PerlIOBase(f)->flags =
4570 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4572 b->ptr = b->end = b->ptr;
4581 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4583 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4586 PerlIOBuf * const b = &m->base;
4588 code = munmap(m->mptr, m->len);
4592 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4595 b->ptr = b->end = b->buf;
4596 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4602 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4604 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4605 PerlIOBuf * const b = &m->base;
4606 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4608 * Already have a readbuffer in progress
4614 * We have a write buffer or flushed PerlIOBuf read buffer
4616 m->bbuf = b->buf; /* save it in case we need it again */
4617 b->buf = NULL; /* Clear to trigger below */
4620 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4623 * Map did not work - recover PerlIOBuf buffer if we have one
4628 b->ptr = b->end = b->buf;
4631 return PerlIOBuf_get_base(aTHX_ f);
4635 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4637 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4638 PerlIOBuf * const b = &m->base;
4639 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4641 if (b->ptr && (b->ptr - count) >= b->buf
4642 && memEQ(b->ptr - count, vbuf, count)) {
4644 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4649 * Loose the unwritable mapped buffer
4653 * If flush took the "buffer" see if we have one from before
4655 if (!b->buf && m->bbuf)
4658 PerlIOBuf_get_base(aTHX_ f);
4662 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4666 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4668 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4669 PerlIOBuf * const b = &m->base;
4671 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4673 * No, or wrong sort of, buffer
4676 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4680 * If unmap took the "buffer" see if we have one from before
4682 if (!b->buf && m->bbuf)
4685 PerlIOBuf_get_base(aTHX_ f);
4689 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4693 PerlIOMmap_flush(pTHX_ PerlIO *f)
4695 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4696 PerlIOBuf * const b = &m->base;
4697 IV code = PerlIOBuf_flush(aTHX_ f);
4699 * Now we are "synced" at PerlIOBuf level
4706 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4711 * We seem to have a PerlIOBuf buffer which was not mapped
4712 * remember it in case we need one later
4721 PerlIOMmap_fill(pTHX_ PerlIO *f)
4723 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4724 IV code = PerlIO_flush(f);
4725 if (code == 0 && !b->buf) {
4726 code = PerlIOMmap_map(aTHX_ f);
4728 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4729 code = PerlIOBuf_fill(aTHX_ f);
4735 PerlIOMmap_close(pTHX_ PerlIO *f)
4737 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4738 PerlIOBuf * const b = &m->base;
4739 IV code = PerlIO_flush(f);
4743 b->ptr = b->end = b->buf;
4745 if (PerlIOBuf_close(aTHX_ f) != 0)
4751 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4753 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4757 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4758 sizeof(PerlIO_funcs),
4761 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4765 PerlIOBase_binmode, /* binmode */
4779 PerlIOBase_clearerr,
4780 PerlIOBase_setlinebuf,
4781 PerlIOMmap_get_base,
4785 PerlIOBuf_set_ptrcnt,
4788 #endif /* HAS_MMAP */
4791 Perl_PerlIO_stdin(pTHX)
4795 PerlIO_stdstreams(aTHX);
4797 return &PL_perlio[1];
4801 Perl_PerlIO_stdout(pTHX)
4805 PerlIO_stdstreams(aTHX);
4807 return &PL_perlio[2];
4811 Perl_PerlIO_stderr(pTHX)
4815 PerlIO_stdstreams(aTHX);
4817 return &PL_perlio[3];
4820 /*--------------------------------------------------------------------------------------*/
4823 PerlIO_getname(PerlIO *f, char *buf)
4828 bool exported = FALSE;
4829 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4831 stdio = PerlIO_exportFILE(f,0);
4835 name = fgetname(stdio, buf);
4836 if (exported) PerlIO_releaseFILE(f,stdio);
4841 PERL_UNUSED_ARG(buf);
4842 Perl_croak(aTHX_ "Don't know how to get file name");
4848 /*--------------------------------------------------------------------------------------*/
4850 * Functions which can be called on any kind of PerlIO implemented in
4854 #undef PerlIO_fdopen
4856 PerlIO_fdopen(int fd, const char *mode)
4859 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4864 PerlIO_open(const char *path, const char *mode)
4867 SV *name = sv_2mortal(newSVpv(path, 0));
4868 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4871 #undef Perlio_reopen
4873 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4876 SV *name = sv_2mortal(newSVpv(path,0));
4877 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4882 PerlIO_getc(PerlIO *f)
4886 if ( 1 == PerlIO_read(f, buf, 1) ) {
4887 return (unsigned char) buf[0];
4892 #undef PerlIO_ungetc
4894 PerlIO_ungetc(PerlIO *f, int ch)
4899 if (PerlIO_unread(f, &buf, 1) == 1)
4907 PerlIO_putc(PerlIO *f, int ch)
4911 return PerlIO_write(f, &buf, 1);
4916 PerlIO_puts(PerlIO *f, const char *s)
4919 return PerlIO_write(f, s, strlen(s));
4922 #undef PerlIO_rewind
4924 PerlIO_rewind(PerlIO *f)
4927 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4931 #undef PerlIO_vprintf
4933 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4936 SV * const sv = newSVpvs("");
4942 Perl_va_copy(ap, apc);
4943 sv_vcatpvf(sv, fmt, &apc);
4945 sv_vcatpvf(sv, fmt, &ap);
4947 s = SvPV_const(sv, len);
4948 wrote = PerlIO_write(f, s, len);
4953 #undef PerlIO_printf
4955 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4960 result = PerlIO_vprintf(f, fmt, ap);
4965 #undef PerlIO_stdoutf
4967 PerlIO_stdoutf(const char *fmt, ...)
4973 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4978 #undef PerlIO_tmpfile
4980 PerlIO_tmpfile(void)
4985 const int fd = win32_tmpfd();
4987 f = PerlIO_fdopen(fd, "w+b");
4989 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4990 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
4992 * I have no idea how portable mkstemp() is ... NI-S
4994 const int fd = mkstemp(SvPVX(sv));
4996 f = PerlIO_fdopen(fd, "w+");
4998 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4999 PerlLIO_unlink(SvPVX_const(sv));
5002 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5003 FILE * const stdio = PerlSIO_tmpfile();
5006 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5007 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5009 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5015 # endif /* else HAS_MKSTEMP */
5016 #endif /* else WIN32 */
5023 #endif /* USE_SFIO */
5024 #endif /* PERLIO_IS_STDIO */
5026 /*======================================================================================*/
5028 * Now some functions in terms of above which may be needed even if we are
5029 * not in true PerlIO mode
5032 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5035 const char *type = NULL;
5037 * Need to supply default layer info from open.pm
5039 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5041 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5046 type = SvPV_const(layers, len);
5047 if (type && mode && mode[0] != 'r') {
5049 * Skip to write part, which is separated by a '\0'
5051 STRLEN read_len = strlen(type);
5052 if (read_len < len) {
5053 type += read_len + 1;
5063 #undef PerlIO_setpos
5065 PerlIO_setpos(PerlIO *f, SV *pos)
5070 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5071 if (f && len == sizeof(Off_t))
5072 return PerlIO_seek(f, *posn, SEEK_SET);
5074 SETERRNO(EINVAL, SS_IVCHAN);
5078 #undef PerlIO_setpos
5080 PerlIO_setpos(PerlIO *f, SV *pos)
5085 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5086 if (f && len == sizeof(Fpos_t)) {
5087 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5088 return fsetpos64(f, fpos);
5090 return fsetpos(f, fpos);
5094 SETERRNO(EINVAL, SS_IVCHAN);
5100 #undef PerlIO_getpos
5102 PerlIO_getpos(PerlIO *f, SV *pos)
5105 Off_t posn = PerlIO_tell(f);
5106 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5107 return (posn == (Off_t) - 1) ? -1 : 0;
5110 #undef PerlIO_getpos
5112 PerlIO_getpos(PerlIO *f, SV *pos)
5117 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5118 code = fgetpos64(f, &fpos);
5120 code = fgetpos(f, &fpos);
5122 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5127 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5130 vprintf(char *pat, char *args)
5132 _doprnt(pat, args, stdout);
5133 return 0; /* wrong, but perl doesn't use the return
5138 vfprintf(FILE *fd, char *pat, char *args)
5140 _doprnt(pat, args, fd);
5141 return 0; /* wrong, but perl doesn't use the return
5147 #ifndef PerlIO_vsprintf
5149 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5152 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5153 PERL_UNUSED_CONTEXT;
5155 #ifndef PERL_MY_VSNPRINTF_GUARDED
5156 if (val < 0 || (n > 0 ? val >= n : 0)) {
5157 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5164 #ifndef PerlIO_sprintf
5166 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5171 result = PerlIO_vsprintf(s, n, fmt, ap);
5179 * c-indentation-style: bsd
5181 * indent-tabs-mode: t
5184 * ex: set ts=8 sts=4 sw=4 noet: