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)
117 #if defined(__osf__) && _XOPEN_SOURCE < 500
118 extern int fseeko(FILE *, off_t, int);
119 extern off_t ftello(FILE *);
124 EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
127 perlsio_binmode(FILE *fp, int iotype, int mode)
130 * This used to be contents of do_binmode in doio.c
133 # if defined(atarist) || defined(__MINT__)
136 ((FILE *) fp)->_flag |= _IOBIN;
138 ((FILE *) fp)->_flag &= ~_IOBIN;
145 if (PerlLIO_setmode(fp, mode) != -1) {
147 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
149 # if defined(WIN32) && defined(__BORLANDC__)
151 * The translation mode of the stream is maintained independent
153 * the translation mode of the fd in the Borland RTL (heavy
154 * digging through their runtime sources reveal). User has to
156 * the mode explicitly for the stream (though they don't
158 * this anywhere). GSAR 97-5-24
164 fp->flags &= ~_F_BIN;
172 # if defined(USEMYBINMODE)
174 if (my_binmode(fp, iotype, mode) != FALSE)
180 PERL_UNUSED_ARG(iotype);
181 PERL_UNUSED_ARG(mode);
189 #define O_ACCMODE 3 /* Assume traditional implementation */
193 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
195 const int result = rawmode & O_ACCMODE;
200 ptype = IoTYPE_RDONLY;
203 ptype = IoTYPE_WRONLY;
211 *writing = (result != O_RDONLY);
213 if (result == O_RDONLY) {
217 else if (rawmode & O_APPEND) {
219 if (result != O_WRONLY)
224 if (result == O_WRONLY)
231 if (rawmode & O_BINARY)
237 #ifndef PERLIO_LAYERS
239 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
241 if (!names || !*names
242 || strEQ(names, ":crlf")
243 || strEQ(names, ":raw")
244 || strEQ(names, ":bytes")
248 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
256 PerlIO_destruct(pTHX)
261 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
264 PERL_UNUSED_ARG(iotype);
265 PERL_UNUSED_ARG(mode);
266 PERL_UNUSED_ARG(names);
269 return perlsio_binmode(fp, iotype, mode);
274 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
276 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
279 #ifdef PERL_IMPLICIT_SYS
280 return PerlSIO_fdupopen(f);
283 return win32_fdupopen(f);
286 const int fd = PerlLIO_dup(PerlIO_fileno(f));
290 const int omode = djgpp_get_stream_mode(f);
292 const int omode = fcntl(fd, F_GETFL);
294 PerlIO_intmode2str(omode,mode,NULL);
295 /* the r+ is a hack */
296 return PerlIO_fdopen(fd, mode);
301 SETERRNO(EBADF, SS_IVCHAN);
311 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
315 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
316 int imode, int perm, PerlIO *old, int narg, SV **args)
320 Perl_croak(aTHX_ "More than one argument to open");
322 if (*args == &PL_sv_undef)
323 return PerlIO_tmpfile();
325 const char *name = SvPV_nolen_const(*args);
326 if (*mode == IoTYPE_NUMERIC) {
327 fd = PerlLIO_open3(name, imode, perm);
329 return PerlIO_fdopen(fd, mode + 1);
332 return PerlIO_reopen(name, mode, old);
335 return PerlIO_open(name, mode);
340 return PerlIO_fdopen(fd, (char *) mode);
345 XS(XS_PerlIO__Layer__find)
349 Perl_croak(aTHX_ "Usage class->find(name[,load])");
351 const char * const name = SvPV_nolen_const(ST(1));
352 ST(0) = (strEQ(name, "crlf")
353 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
360 Perl_boot_core_PerlIO(pTHX)
362 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
368 #ifdef PERLIO_IS_STDIO
375 * Does nothing (yet) except force this file to be included in perl
376 * binary. That allows this file to force inclusion of other functions
377 * that may be required by loadable extensions e.g. for
378 * FileHandle::tmpfile
382 #undef PerlIO_tmpfile
389 #else /* PERLIO_IS_STDIO */
397 * This section is just to make sure these functions get pulled in from
401 #undef PerlIO_tmpfile
413 * Force this file to be included in perl binary. Which allows this
414 * file to force inclusion of other functions that may be required by
415 * loadable extensions e.g. for FileHandle::tmpfile
419 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
420 * results in a lot of lseek()s to regular files and lot of small
423 sfset(sfstdout, SF_SHARE, 0);
426 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
428 PerlIO_importFILE(FILE *stdio, const char *mode)
430 const int fd = fileno(stdio);
431 if (!mode || !*mode) {
434 return PerlIO_fdopen(fd, mode);
438 PerlIO_findFILE(PerlIO *pio)
440 const int fd = PerlIO_fileno(pio);
441 FILE * const f = fdopen(fd, "r+");
443 if (!f && errno == EINVAL)
445 if (!f && errno == EINVAL)
452 /*======================================================================================*/
454 * Implement all the PerlIO interface ourselves.
460 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
467 #include <sys/mman.h>
471 PerlIO_debug(const char *fmt, ...)
476 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
477 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
479 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
481 PL_perlio_debug_fd = -1;
483 if (PL_perlio_debug_fd > 0) {
486 const char * const s = CopFILE(PL_curcop);
487 /* Use fixed buffer as sv_catpvf etc. needs SVs */
489 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
490 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
491 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
493 const char *s = CopFILE(PL_curcop);
495 SV * const sv = newSVpvs("");
496 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
497 (IV) CopLINE(PL_curcop));
498 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
500 s = SvPV_const(sv, len);
501 PerlLIO_write(PL_perlio_debug_fd, s, len);
508 /*--------------------------------------------------------------------------------------*/
511 * Inner level routines
515 * Table of pointers to the PerlIO structs (malloc'ed)
517 #define PERLIO_TABLE_SIZE 64
520 PerlIO_allocate(pTHX)
524 * Find a free slot in the table, allocating new table as necessary
529 while ((f = *last)) {
531 last = (PerlIO **) (f);
532 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
538 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
546 #undef PerlIO_fdupopen
548 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
550 if (PerlIOValid(f)) {
551 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
552 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
554 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
556 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
560 SETERRNO(EBADF, SS_IVCHAN);
566 PerlIO_cleantable(pTHX_ PerlIO **tablep)
568 PerlIO * const table = *tablep;
571 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
572 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
573 PerlIO * const f = table + i;
585 PerlIO_list_alloc(pTHX)
589 Newxz(list, 1, PerlIO_list_t);
595 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
598 if (--list->refcnt == 0) {
601 for (i = 0; i < list->cur; i++) {
602 if (list->array[i].arg)
603 SvREFCNT_dec(list->array[i].arg);
605 Safefree(list->array);
613 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
619 if (list->cur >= list->len) {
622 Renew(list->array, list->len, PerlIO_pair_t);
624 Newx(list->array, list->len, PerlIO_pair_t);
626 p = &(list->array[list->cur++]);
628 if ((p->arg = arg)) {
629 SvREFCNT_inc_simple_void_NN(arg);
634 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
636 PerlIO_list_t *list = NULL;
639 list = PerlIO_list_alloc(aTHX);
640 for (i=0; i < proto->cur; i++) {
642 if (proto->array[i].arg)
643 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
644 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
651 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
654 PerlIO **table = &proto->Iperlio;
657 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
658 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
659 PerlIO_allocate(aTHX); /* root slot is never used */
660 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
661 while ((f = *table)) {
663 table = (PerlIO **) (f++);
664 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
666 (void) fp_dup(f, 0, param);
673 PERL_UNUSED_ARG(proto);
674 PERL_UNUSED_ARG(param);
679 PerlIO_destruct(pTHX)
682 PerlIO **table = &PL_perlio;
685 PerlIO_debug("Destruct %p\n",(void*)aTHX);
687 while ((f = *table)) {
689 table = (PerlIO **) (f++);
690 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
694 if (l->tab->kind & PERLIO_K_DESTRUCT) {
695 PerlIO_debug("Destruct popping %s\n", l->tab->name);
709 PerlIO_pop(pTHX_ PerlIO *f)
711 const PerlIOl *l = *f;
713 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
714 if (l->tab->Popped) {
716 * If popped returns non-zero do not free its layer structure
717 * it has either done so itself, or it is shared and still in
720 if ((*l->tab->Popped) (aTHX_ f) != 0)
728 /* Return as an array the stack of layers on a filehandle. Note that
729 * the stack is returned top-first in the array, and there are three
730 * times as many array elements as there are layers in the stack: the
731 * first element of a layer triplet is the name, the second one is the
732 * arguments, and the third one is the flags. */
735 PerlIO_get_layers(pTHX_ PerlIO *f)
738 AV * const av = newAV();
740 if (PerlIOValid(f)) {
741 PerlIOl *l = PerlIOBase(f);
744 SV * const name = l->tab && l->tab->name ?
745 newSVpv(l->tab->name, 0) : &PL_sv_undef;
746 SV * const arg = l->tab && l->tab->Getarg ?
747 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
750 av_push(av, newSViv((IV)l->flags));
758 /*--------------------------------------------------------------------------------------*/
760 * XS Interface for perl code
764 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
768 if ((SSize_t) len <= 0)
770 for (i = 0; i < PL_known_layers->cur; i++) {
771 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
772 if (memEQ(f->name, name, len) && f->name[len] == 0) {
773 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
777 if (load && PL_subname && PL_def_layerlist
778 && PL_def_layerlist->cur >= 2) {
779 if (PL_in_load_module) {
780 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
783 SV * const pkgsv = newSVpvs("PerlIO");
784 SV * const layer = newSVpvn(name, len);
785 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
787 SAVEINT(PL_in_load_module);
789 SAVEGENERICSV(PL_warnhook);
790 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
794 * The two SVs are magically freed by load_module
796 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
799 return PerlIO_find_layer(aTHX_ name, len, 0);
802 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
806 #ifdef USE_ATTRIBUTES_FOR_PERLIO
809 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
812 IO * const io = GvIOn((GV *) SvRV(sv));
813 PerlIO * const ifp = IoIFP(io);
814 PerlIO * const ofp = IoOFP(io);
815 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
821 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
824 IO * const io = GvIOn((GV *) SvRV(sv));
825 PerlIO * const ifp = IoIFP(io);
826 PerlIO * const ofp = IoOFP(io);
827 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
833 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
835 Perl_warn(aTHX_ "clear %" SVf, sv);
840 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
842 Perl_warn(aTHX_ "free %" SVf, sv);
846 MGVTBL perlio_vtab = {
854 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
857 SV * const sv = SvRV(ST(1));
858 AV * const av = newAV();
862 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
864 mg = mg_find(sv, PERL_MAGIC_ext);
865 mg->mg_virtual = &perlio_vtab;
867 Perl_warn(aTHX_ "attrib %" SVf, sv);
868 for (i = 2; i < items; i++) {
870 const char * const name = SvPV_const(ST(i), len);
871 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
873 av_push(av, SvREFCNT_inc_simple_NN(layer));
884 #endif /* USE_ATTIBUTES_FOR_PERLIO */
887 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
889 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
890 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
894 XS(XS_PerlIO__Layer__NoWarnings)
896 /* This is used as a %SIG{__WARN__} handler to supress warnings
897 during loading of layers.
902 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
906 XS(XS_PerlIO__Layer__find)
911 Perl_croak(aTHX_ "Usage class->find(name[,load])");
914 const char * const name = SvPV_const(ST(1), len);
915 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
916 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
918 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
925 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
928 if (!PL_known_layers)
929 PL_known_layers = PerlIO_list_alloc(aTHX);
930 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
931 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
935 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
939 const char *s = names;
941 while (isSPACE(*s) || *s == ':')
946 const char *as = NULL;
948 if (!isIDFIRST(*s)) {
950 * Message is consistent with how attribute lists are
951 * passed. Even though this means "foo : : bar" is
952 * seen as an invalid separator character.
954 const char q = ((*s == '\'') ? '"' : '\'');
955 if (ckWARN(WARN_LAYER))
956 Perl_warner(aTHX_ packWARN(WARN_LAYER),
957 "Invalid separator character %c%c%c in PerlIO layer specification %s",
959 SETERRNO(EINVAL, LIB_INVARG);
964 } while (isALNUM(*e));
980 * It's a nul terminated string, not allowed
981 * to \ the terminating null. Anything other
982 * character is passed over.
992 if (ckWARN(WARN_LAYER))
993 Perl_warner(aTHX_ packWARN(WARN_LAYER),
994 "Argument list not closed for PerlIO layer \"%.*s\"",
1006 PerlIO_funcs * const layer =
1007 PerlIO_find_layer(aTHX_ s, llen, 1);
1009 PerlIO_list_push(aTHX_ av, layer,
1015 if (ckWARN(WARN_LAYER))
1016 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1029 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1032 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1033 #ifdef PERLIO_USING_CRLF
1036 if (PerlIO_stdio.Set_ptrcnt)
1037 tab = &PerlIO_stdio;
1039 PerlIO_debug("Pushing %s\n", tab->name);
1040 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1045 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1047 return av->array[n].arg;
1051 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1053 if (n >= 0 && n < av->cur) {
1054 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1055 av->array[n].funcs->name);
1056 return av->array[n].funcs;
1059 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1064 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1066 PERL_UNUSED_ARG(mode);
1067 PERL_UNUSED_ARG(arg);
1068 PERL_UNUSED_ARG(tab);
1069 if (PerlIOValid(f)) {
1071 PerlIO_pop(aTHX_ f);
1077 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1078 sizeof(PerlIO_funcs),
1081 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1101 NULL, /* get_base */
1102 NULL, /* get_bufsiz */
1105 NULL, /* set_ptrcnt */
1109 PerlIO_default_layers(pTHX)
1112 if (!PL_def_layerlist) {
1113 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1114 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1115 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1116 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1118 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1120 osLayer = &PerlIO_win32;
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1124 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1125 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1126 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1128 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1130 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1131 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1132 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1133 PerlIO_list_push(aTHX_ PL_def_layerlist,
1134 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1137 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1140 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1143 if (PL_def_layerlist->cur < 2) {
1144 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1146 return PL_def_layerlist;
1150 Perl_boot_core_PerlIO(pTHX)
1152 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1153 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1156 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1157 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1161 PerlIO_default_layer(pTHX_ I32 n)
1164 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1167 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1170 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1171 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1174 PerlIO_stdstreams(pTHX)
1178 PerlIO_allocate(aTHX);
1179 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1180 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1181 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1186 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1188 if (tab->fsize != sizeof(PerlIO_funcs)) {
1190 Perl_croak(aTHX_ "Layer does not match this perl");
1194 if (tab->size < sizeof(PerlIOl)) {
1197 /* Real layer with a data area */
1200 Newxz(temp, tab->size, char);
1204 l->tab = (PerlIO_funcs*) tab;
1206 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1207 (void*)f, tab->name,
1208 (mode) ? mode : "(Null)", (void*)arg);
1209 if (*l->tab->Pushed &&
1211 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1212 PerlIO_pop(aTHX_ f);
1221 /* Pseudo-layer where push does its own stack adjust */
1222 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1223 (mode) ? mode : "(Null)", (void*)arg);
1225 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1233 PerlIOBase_binmode(pTHX_ PerlIO *f)
1235 if (PerlIOValid(f)) {
1236 /* Is layer suitable for raw stream ? */
1237 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1238 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1239 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1242 /* Not suitable - pop it */
1243 PerlIO_pop(aTHX_ f);
1251 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1253 PERL_UNUSED_ARG(mode);
1254 PERL_UNUSED_ARG(arg);
1255 PERL_UNUSED_ARG(tab);
1257 if (PerlIOValid(f)) {
1262 * Strip all layers that are not suitable for a raw stream
1265 while (t && (l = *t)) {
1266 if (l->tab->Binmode) {
1267 /* Has a handler - normal case */
1268 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1270 /* Layer still there - move down a layer */
1279 /* No handler - pop it */
1280 PerlIO_pop(aTHX_ t);
1283 if (PerlIOValid(f)) {
1284 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1292 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1293 PerlIO_list_t *layers, IV n, IV max)
1297 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1299 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1310 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1314 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1315 code = PerlIO_parse_layers(aTHX_ layers, names);
1317 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1319 PerlIO_list_free(aTHX_ layers);
1325 /*--------------------------------------------------------------------------------------*/
1327 * Given the abstraction above the public API functions
1331 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1333 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1334 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1335 iotype, mode, (names) ? names : "(Null)");
1338 /* Do not flush etc. if (e.g.) switching encodings.
1339 if a pushed layer knows it needs to flush lower layers
1340 (for example :unix which is never going to call them)
1341 it can do the flush when it is pushed.
1343 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1346 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1347 #ifdef PERLIO_USING_CRLF
1348 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1349 O_BINARY so we can look for it in mode.
1351 if (!(mode & O_BINARY)) {
1353 /* FIXME?: Looking down the layer stack seems wrong,
1354 but is a way of reaching past (say) an encoding layer
1355 to flip CRLF-ness of the layer(s) below
1358 /* Perhaps we should turn on bottom-most aware layer
1359 e.g. Ilya's idea that UNIX TTY could serve
1361 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1362 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1363 /* Not in text mode - flush any pending stuff and flip it */
1365 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1367 /* Only need to turn it on in one layer so we are done */
1372 /* Not finding a CRLF aware layer presumably means we are binary
1373 which is not what was requested - so we failed
1374 We _could_ push :crlf layer but so could caller
1379 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1380 So code that used to be here is now in PerlIORaw_pushed().
1382 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1387 PerlIO__close(pTHX_ PerlIO *f)
1389 if (PerlIOValid(f)) {
1390 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1391 if (tab && tab->Close)
1392 return (*tab->Close)(aTHX_ f);
1394 return PerlIOBase_close(aTHX_ f);
1397 SETERRNO(EBADF, SS_IVCHAN);
1403 Perl_PerlIO_close(pTHX_ PerlIO *f)
1405 const int code = PerlIO__close(aTHX_ f);
1406 while (PerlIOValid(f)) {
1407 PerlIO_pop(aTHX_ f);
1413 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1416 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1420 static PerlIO_funcs *
1421 PerlIO_layer_from_ref(pTHX_ SV *sv)
1425 * For any scalar type load the handler which is bundled with perl
1427 if (SvTYPE(sv) < SVt_PVAV)
1428 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1431 * For other types allow if layer is known but don't try and load it
1433 switch (SvTYPE(sv)) {
1435 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1437 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1439 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1441 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1448 PerlIO_resolve_layers(pTHX_ const char *layers,
1449 const char *mode, int narg, SV **args)
1452 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1455 PerlIO_stdstreams(aTHX);
1457 SV * const arg = *args;
1459 * If it is a reference but not an object see if we have a handler
1462 if (SvROK(arg) && !sv_isobject(arg)) {
1463 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1465 def = PerlIO_list_alloc(aTHX);
1466 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1470 * Don't fail if handler cannot be found :via(...) etc. may do
1471 * something sensible else we will just stringfy and open
1476 if (!layers || !*layers)
1477 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1478 if (layers && *layers) {
1482 av = PerlIO_list_alloc(aTHX);
1483 for (i = 0; i < def->cur; i++) {
1484 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1491 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1495 PerlIO_list_free(aTHX_ av);
1507 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1508 int imode, int perm, PerlIO *f, int narg, SV **args)
1511 if (!f && narg == 1 && *args == &PL_sv_undef) {
1512 if ((f = PerlIO_tmpfile())) {
1513 if (!layers || !*layers)
1514 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1515 if (layers && *layers)
1516 PerlIO_apply_layers(aTHX_ f, mode, layers);
1520 PerlIO_list_t *layera;
1522 PerlIO_funcs *tab = NULL;
1523 if (PerlIOValid(f)) {
1525 * This is "reopen" - it is not tested as perl does not use it
1529 layera = PerlIO_list_alloc(aTHX);
1531 SV * const arg = (l->tab->Getarg)
1532 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1534 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1535 l = *PerlIONext(&l);
1539 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1545 * Start at "top" of layer stack
1547 n = layera->cur - 1;
1549 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1558 * Found that layer 'n' can do opens - call it
1560 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1561 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1563 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1564 tab->name, layers ? layers : "(Null)", mode, fd,
1565 imode, perm, (void*)f, narg, (void*)args);
1567 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1570 SETERRNO(EINVAL, LIB_INVARG);
1574 if (n + 1 < layera->cur) {
1576 * More layers above the one that we used to open -
1579 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1580 /* If pushing layers fails close the file */
1587 PerlIO_list_free(aTHX_ layera);
1594 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1596 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1600 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1602 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1606 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1608 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1612 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1614 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1618 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1620 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1624 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1629 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1631 if (tab && tab->Flush)
1632 return (*tab->Flush) (aTHX_ f);
1634 return 0; /* If no Flush defined, silently succeed. */
1637 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1638 SETERRNO(EBADF, SS_IVCHAN);
1644 * Is it good API design to do flush-all on NULL, a potentially
1645 * errorneous input? Maybe some magical value (PerlIO*
1646 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1647 * things on fflush(NULL), but should we be bound by their design
1650 PerlIO **table = &PL_perlio;
1652 while ((f = *table)) {
1654 table = (PerlIO **) (f++);
1655 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1656 if (*f && PerlIO_flush(f) != 0)
1666 PerlIOBase_flush_linebuf(pTHX)
1669 PerlIO **table = &PL_perlio;
1671 while ((f = *table)) {
1673 table = (PerlIO **) (f++);
1674 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1677 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1678 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1686 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1688 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1692 PerlIO_isutf8(PerlIO *f)
1695 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1697 SETERRNO(EBADF, SS_IVCHAN);
1703 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1705 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1709 Perl_PerlIO_error(pTHX_ PerlIO *f)
1711 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1715 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1717 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1721 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1723 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1727 PerlIO_has_base(PerlIO *f)
1729 if (PerlIOValid(f)) {
1730 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1733 return (tab->Get_base != NULL);
1734 SETERRNO(EINVAL, LIB_INVARG);
1737 SETERRNO(EBADF, SS_IVCHAN);
1743 PerlIO_fast_gets(PerlIO *f)
1745 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1746 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1749 return (tab->Set_ptrcnt != NULL);
1750 SETERRNO(EINVAL, LIB_INVARG);
1753 SETERRNO(EBADF, SS_IVCHAN);
1759 PerlIO_has_cntptr(PerlIO *f)
1761 if (PerlIOValid(f)) {
1762 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1765 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1766 SETERRNO(EINVAL, LIB_INVARG);
1769 SETERRNO(EBADF, SS_IVCHAN);
1775 PerlIO_canset_cnt(PerlIO *f)
1777 if (PerlIOValid(f)) {
1778 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1781 return (tab->Set_ptrcnt != NULL);
1782 SETERRNO(EINVAL, LIB_INVARG);
1785 SETERRNO(EBADF, SS_IVCHAN);
1791 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1793 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1797 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1799 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1803 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1805 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1809 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1811 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1815 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1817 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1821 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1823 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1827 /*--------------------------------------------------------------------------------------*/
1829 * utf8 and raw dummy layers
1833 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1835 PERL_UNUSED_CONTEXT;
1836 PERL_UNUSED_ARG(mode);
1837 PERL_UNUSED_ARG(arg);
1838 if (PerlIOValid(f)) {
1839 if (tab->kind & PERLIO_K_UTF8)
1840 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1842 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1848 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1849 sizeof(PerlIO_funcs),
1852 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1872 NULL, /* get_base */
1873 NULL, /* get_bufsiz */
1876 NULL, /* set_ptrcnt */
1879 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1880 sizeof(PerlIO_funcs),
1903 NULL, /* get_base */
1904 NULL, /* get_bufsiz */
1907 NULL, /* set_ptrcnt */
1911 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1912 IV n, const char *mode, int fd, int imode, int perm,
1913 PerlIO *old, int narg, SV **args)
1915 PerlIO_funcs * const tab = PerlIO_default_btm();
1916 PERL_UNUSED_ARG(self);
1917 if (tab && tab->Open)
1918 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1920 SETERRNO(EINVAL, LIB_INVARG);
1924 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1925 sizeof(PerlIO_funcs),
1948 NULL, /* get_base */
1949 NULL, /* get_bufsiz */
1952 NULL, /* set_ptrcnt */
1954 /*--------------------------------------------------------------------------------------*/
1955 /*--------------------------------------------------------------------------------------*/
1957 * "Methods" of the "base class"
1961 PerlIOBase_fileno(pTHX_ PerlIO *f)
1963 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1967 PerlIO_modestr(PerlIO * f, char *buf)
1970 if (PerlIOValid(f)) {
1971 const IV flags = PerlIOBase(f)->flags;
1972 if (flags & PERLIO_F_APPEND) {
1974 if (flags & PERLIO_F_CANREAD) {
1978 else if (flags & PERLIO_F_CANREAD) {
1980 if (flags & PERLIO_F_CANWRITE)
1983 else if (flags & PERLIO_F_CANWRITE) {
1985 if (flags & PERLIO_F_CANREAD) {
1989 #ifdef PERLIO_USING_CRLF
1990 if (!(flags & PERLIO_F_CRLF))
2000 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2002 PerlIOl * const l = PerlIOBase(f);
2003 PERL_UNUSED_CONTEXT;
2004 PERL_UNUSED_ARG(arg);
2006 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2007 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2008 if (tab->Set_ptrcnt != NULL)
2009 l->flags |= PERLIO_F_FASTGETS;
2011 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2015 l->flags |= PERLIO_F_CANREAD;
2018 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2021 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2024 SETERRNO(EINVAL, LIB_INVARG);
2030 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2033 l->flags &= ~PERLIO_F_CRLF;
2036 l->flags |= PERLIO_F_CRLF;
2039 SETERRNO(EINVAL, LIB_INVARG);
2046 l->flags |= l->next->flags &
2047 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2052 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2053 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2054 l->flags, PerlIO_modestr(f, temp));
2060 PerlIOBase_popped(pTHX_ PerlIO *f)
2062 PERL_UNUSED_CONTEXT;
2068 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2071 * Save the position as current head considers it
2073 const Off_t old = PerlIO_tell(f);
2074 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2075 PerlIOSelf(f, PerlIOBuf)->posn = old;
2076 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2080 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2082 STDCHAR *buf = (STDCHAR *) vbuf;
2084 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2085 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2086 SETERRNO(EBADF, SS_IVCHAN);
2092 SSize_t avail = PerlIO_get_cnt(f);
2095 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2097 STDCHAR *ptr = PerlIO_get_ptr(f);
2098 Copy(ptr, buf, take, STDCHAR);
2099 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2102 if (avail == 0) /* set_ptrcnt could have reset avail */
2105 if (count > 0 && avail <= 0) {
2106 if (PerlIO_fill(f) != 0)
2111 return (buf - (STDCHAR *) vbuf);
2117 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2119 PERL_UNUSED_CONTEXT;
2125 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2127 PERL_UNUSED_CONTEXT;
2133 PerlIOBase_close(pTHX_ PerlIO *f)
2136 if (PerlIOValid(f)) {
2137 PerlIO *n = PerlIONext(f);
2138 code = PerlIO_flush(f);
2139 PerlIOBase(f)->flags &=
2140 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2141 while (PerlIOValid(n)) {
2142 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2143 if (tab && tab->Close) {
2144 if ((*tab->Close)(aTHX_ n) != 0)
2149 PerlIOBase(n)->flags &=
2150 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2156 SETERRNO(EBADF, SS_IVCHAN);
2162 PerlIOBase_eof(pTHX_ PerlIO *f)
2164 PERL_UNUSED_CONTEXT;
2165 if (PerlIOValid(f)) {
2166 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2172 PerlIOBase_error(pTHX_ PerlIO *f)
2174 PERL_UNUSED_CONTEXT;
2175 if (PerlIOValid(f)) {
2176 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2182 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2184 if (PerlIOValid(f)) {
2185 PerlIO * const n = PerlIONext(f);
2186 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2193 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2195 PERL_UNUSED_CONTEXT;
2196 if (PerlIOValid(f)) {
2197 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2202 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2208 return sv_dup(arg, param);
2211 return newSVsv(arg);
2214 PERL_UNUSED_ARG(param);
2215 return newSVsv(arg);
2220 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2222 PerlIO * const nexto = PerlIONext(o);
2223 if (PerlIOValid(nexto)) {
2224 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2225 if (tab && tab->Dup)
2226 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2228 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2231 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2234 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2235 self->name, (void*)f, (void*)o, (void*)param);
2237 arg = (*self->Getarg)(aTHX_ o, param, flags);
2241 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2250 perl_mutex PerlIO_mutex;
2253 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2255 /* Must be called with PerlIO_mutex locked. */
2257 S_more_refcounted_fds(pTHX_ const int new_fd) {
2259 const int old_max = PL_perlio_fd_refcnt_size;
2260 const int new_max = 16 + (new_fd & ~15);
2263 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2264 old_max, new_fd, new_max);
2266 if (new_fd < old_max) {
2270 assert (new_max > new_fd);
2273 (int*) PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2277 MUTEX_UNLOCK(&PerlIO_mutex);
2279 /* Can't use PerlIO to write as it allocates memory */
2280 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2281 PL_no_mem, strlen(PL_no_mem));
2285 PL_perlio_fd_refcnt_size = new_max;
2286 PL_perlio_fd_refcnt = new_array;
2288 PerlIO_debug("Zeroing %p, %d\n",
2289 (void*)(new_array + old_max),
2292 Zero(new_array + old_max, new_max - old_max, int);
2299 /* Place holder for stdstreams call ??? */
2301 MUTEX_INIT(&PerlIO_mutex);
2303 PERL_UNUSED_CONTEXT;
2308 PerlIOUnix_refcnt_inc(int fd)
2315 MUTEX_LOCK(&PerlIO_mutex);
2317 if (fd >= PL_perlio_fd_refcnt_size)
2318 S_more_refcounted_fds(aTHX_ fd);
2320 PL_perlio_fd_refcnt[fd]++;
2321 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2324 MUTEX_UNLOCK(&PerlIO_mutex);
2330 PerlIOUnix_refcnt_dec(int fd)
2337 MUTEX_LOCK(&PerlIO_mutex);
2339 /* XXX should this be a panic? */
2340 if (fd >= PL_perlio_fd_refcnt_size)
2341 S_more_refcounted_fds(aTHX_ fd);
2343 /* XXX should this be a panic if it drops below 0? */
2344 cnt = --PL_perlio_fd_refcnt[fd];
2345 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2347 MUTEX_UNLOCK(&PerlIO_mutex);
2354 PerlIO_cleanup(pTHX)
2359 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2361 PerlIO_debug("Cleanup layers\n");
2363 /* Raise STDIN..STDERR refcount so we don't close them */
2364 for (i=0; i < 3; i++)
2365 PerlIOUnix_refcnt_inc(i);
2366 PerlIO_cleantable(aTHX_ &PL_perlio);
2367 /* Restore STDIN..STDERR refcount */
2368 for (i=0; i < 3; i++)
2369 PerlIOUnix_refcnt_dec(i);
2371 if (PL_known_layers) {
2372 PerlIO_list_free(aTHX_ PL_known_layers);
2373 PL_known_layers = NULL;
2375 if (PL_def_layerlist) {
2376 PerlIO_list_free(aTHX_ PL_def_layerlist);
2377 PL_def_layerlist = NULL;
2383 /*--------------------------------------------------------------------------------------*/
2385 * Bottom-most level for UNIX-like case
2389 struct _PerlIO base; /* The generic part */
2390 int fd; /* UNIX like file descriptor */
2391 int oflags; /* open/fcntl flags */
2395 PerlIOUnix_oflags(const char *mode)
2398 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2403 if (*++mode == '+') {
2410 oflags = O_CREAT | O_TRUNC;
2411 if (*++mode == '+') {
2420 oflags = O_CREAT | O_APPEND;
2421 if (*++mode == '+') {
2434 else if (*mode == 't') {
2436 oflags &= ~O_BINARY;
2440 * Always open in binary mode
2443 if (*mode || oflags == -1) {
2444 SETERRNO(EINVAL, LIB_INVARG);
2451 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2453 PERL_UNUSED_CONTEXT;
2454 return PerlIOSelf(f, PerlIOUnix)->fd;
2458 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2460 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2463 if (PerlLIO_fstat(fd, &st) == 0) {
2464 if (!S_ISREG(st.st_mode)) {
2465 PerlIO_debug("%d is not regular file\n",fd);
2466 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2469 PerlIO_debug("%d _is_ a regular file\n",fd);
2475 PerlIOUnix_refcnt_inc(fd);
2476 PERL_UNUSED_CONTEXT;
2480 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2482 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2483 if (*PerlIONext(f)) {
2484 /* We never call down so do any pending stuff now */
2485 PerlIO_flush(PerlIONext(f));
2487 * XXX could (or should) we retrieve the oflags from the open file
2488 * handle rather than believing the "mode" we are passed in? XXX
2489 * Should the value on NULL mode be 0 or -1?
2491 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2492 mode ? PerlIOUnix_oflags(mode) : -1);
2494 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2500 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2502 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2504 PERL_UNUSED_CONTEXT;
2505 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2507 SETERRNO(ESPIPE, LIB_INVARG);
2509 SETERRNO(EINVAL, LIB_INVARG);
2513 new_loc = PerlLIO_lseek(fd, offset, whence);
2514 if (new_loc == (Off_t) - 1)
2516 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2521 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2522 IV n, const char *mode, int fd, int imode,
2523 int perm, PerlIO *f, int narg, SV **args)
2525 if (PerlIOValid(f)) {
2526 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2527 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2530 if (*mode == IoTYPE_NUMERIC)
2533 imode = PerlIOUnix_oflags(mode);
2537 const char *path = SvPV_nolen_const(*args);
2538 fd = PerlLIO_open3(path, imode, perm);
2542 if (*mode == IoTYPE_IMPLICIT)
2545 f = PerlIO_allocate(aTHX);
2547 if (!PerlIOValid(f)) {
2548 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2552 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2553 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2554 if (*mode == IoTYPE_APPEND)
2555 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2562 * FIXME: pop layers ???
2570 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2572 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2574 if (flags & PERLIO_DUP_FD) {
2575 fd = PerlLIO_dup(fd);
2578 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2580 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2581 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2590 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2593 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2594 #ifdef PERLIO_STD_SPECIAL
2596 return PERLIO_STD_IN(fd, vbuf, count);
2598 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2599 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2603 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2604 if (len >= 0 || errno != EINTR) {
2606 if (errno != EAGAIN) {
2607 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2610 else if (len == 0 && count != 0) {
2611 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2622 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2625 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2626 #ifdef PERLIO_STD_SPECIAL
2627 if (fd == 1 || fd == 2)
2628 return PERLIO_STD_OUT(fd, vbuf, count);
2631 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2632 if (len >= 0 || errno != EINTR) {
2634 if (errno != EAGAIN) {
2635 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2646 PerlIOUnix_tell(pTHX_ PerlIO *f)
2648 PERL_UNUSED_CONTEXT;
2650 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2655 PerlIOUnix_close(pTHX_ PerlIO *f)
2658 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2660 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2661 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2662 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2667 SETERRNO(EBADF,SS_IVCHAN);
2670 while (PerlLIO_close(fd) != 0) {
2671 if (errno != EINTR) {
2678 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2683 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2684 sizeof(PerlIO_funcs),
2691 PerlIOBase_binmode, /* binmode */
2701 PerlIOBase_noop_ok, /* flush */
2702 PerlIOBase_noop_fail, /* fill */
2705 PerlIOBase_clearerr,
2706 PerlIOBase_setlinebuf,
2707 NULL, /* get_base */
2708 NULL, /* get_bufsiz */
2711 NULL, /* set_ptrcnt */
2714 /*--------------------------------------------------------------------------------------*/
2719 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2720 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2721 broken by the last second glibc 2.3 fix
2723 #define STDIO_BUFFER_WRITABLE
2728 struct _PerlIO base;
2729 FILE *stdio; /* The stream */
2733 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2735 PERL_UNUSED_CONTEXT;
2737 if (PerlIOValid(f)) {
2738 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2740 return PerlSIO_fileno(s);
2747 PerlIOStdio_mode(const char *mode, char *tmode)
2749 char * const ret = tmode;
2755 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2763 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2766 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2767 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2768 if (toptab == tab) {
2769 /* Top is already stdio - pop self (duplicate) and use original */
2770 PerlIO_pop(aTHX_ f);
2773 const int fd = PerlIO_fileno(n);
2776 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2777 mode = PerlIOStdio_mode(mode, tmode)))) {
2778 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2779 /* We never call down so do any pending stuff now */
2780 PerlIO_flush(PerlIONext(f));
2787 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2792 PerlIO_importFILE(FILE *stdio, const char *mode)
2798 if (!mode || !*mode) {
2799 /* We need to probe to see how we can open the stream
2800 so start with read/write and then try write and read
2801 we dup() so that we can fclose without loosing the fd.
2803 Note that the errno value set by a failing fdopen
2804 varies between stdio implementations.
2806 const int fd = PerlLIO_dup(fileno(stdio));
2807 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2809 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2812 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2815 /* Don't seem to be able to open */
2821 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2822 s = PerlIOSelf(f, PerlIOStdio);
2830 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2831 IV n, const char *mode, int fd, int imode,
2832 int perm, PerlIO *f, int narg, SV **args)
2835 if (PerlIOValid(f)) {
2836 const char * const path = SvPV_nolen_const(*args);
2837 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2839 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2840 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2845 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2850 const char * const path = SvPV_nolen_const(*args);
2851 if (*mode == IoTYPE_NUMERIC) {
2853 fd = PerlLIO_open3(path, imode, perm);
2857 bool appended = FALSE;
2859 /* Cygwin wants its 'b' early. */
2861 mode = PerlIOStdio_mode(mode, tmode);
2863 stdio = PerlSIO_fopen(path, mode);
2866 f = PerlIO_allocate(aTHX);
2869 mode = PerlIOStdio_mode(mode, tmode);
2870 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2872 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2873 PerlIOUnix_refcnt_inc(fileno(stdio));
2875 PerlSIO_fclose(stdio);
2887 if (*mode == IoTYPE_IMPLICIT) {
2894 stdio = PerlSIO_stdin;
2897 stdio = PerlSIO_stdout;
2900 stdio = PerlSIO_stderr;
2905 stdio = PerlSIO_fdopen(fd, mode =
2906 PerlIOStdio_mode(mode, tmode));
2910 f = PerlIO_allocate(aTHX);
2912 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2913 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2914 PerlIOUnix_refcnt_inc(fileno(stdio));
2924 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2926 /* This assumes no layers underneath - which is what
2927 happens, but is not how I remember it. NI-S 2001/10/16
2929 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2930 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2931 const int fd = fileno(stdio);
2933 if (flags & PERLIO_DUP_FD) {
2934 const int dfd = PerlLIO_dup(fileno(stdio));
2936 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2941 /* FIXME: To avoid messy error recovery if dup fails
2942 re-use the existing stdio as though flag was not set
2946 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2948 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2949 PerlIOUnix_refcnt_inc(fileno(stdio));
2955 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2957 PERL_UNUSED_CONTEXT;
2959 /* XXX this could use PerlIO_canset_fileno() and
2960 * PerlIO_set_fileno() support from Configure
2962 # if defined(__UCLIBC__)
2963 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2966 # elif defined(__GLIBC__)
2967 /* There may be a better way for GLIBC:
2968 - libio.h defines a flag to not close() on cleanup
2972 # elif defined(__sun__)
2975 # elif defined(__hpux)
2979 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2980 your platform does not have special entry try this one.
2981 [For OSF only have confirmation for Tru64 (alpha)
2982 but assume other OSFs will be similar.]
2984 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2987 # elif defined(__FreeBSD__)
2988 /* There may be a better way on FreeBSD:
2989 - we could insert a dummy func in the _close function entry
2990 f->_close = (int (*)(void *)) dummy_close;
2994 # elif defined(__OpenBSD__)
2995 /* There may be a better way on OpenBSD:
2996 - we could insert a dummy func in the _close function entry
2997 f->_close = (int (*)(void *)) dummy_close;
3001 # elif defined(__EMX__)
3002 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3005 # elif defined(__CYGWIN__)
3006 /* There may be a better way on CYGWIN:
3007 - we could insert a dummy func in the _close function entry
3008 f->_close = (int (*)(void *)) dummy_close;
3012 # elif defined(WIN32)
3013 # if defined(__BORLANDC__)
3014 f->fd = PerlLIO_dup(fileno(f));
3015 # elif defined(UNDER_CE)
3016 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3025 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3026 (which isn't thread safe) instead
3028 # error "Don't know how to set FILE.fileno on your platform"
3036 PerlIOStdio_close(pTHX_ PerlIO *f)
3038 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3044 const int fd = fileno(stdio);
3049 #ifdef SOCKS5_VERSION_NAME
3050 /* Socks lib overrides close() but stdio isn't linked to
3051 that library (though we are) - so we must call close()
3052 on sockets on stdio's behalf.
3055 Sock_size_t optlen = sizeof(int);
3056 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3059 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3062 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3063 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3065 if (stdio == stdout || stdio == stderr)
3066 return PerlIO_flush(f);
3067 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3068 Use Sarathy's trick from maint-5.6 to invalidate the
3069 fileno slot of the FILE *
3071 result = PerlIO_flush(f);
3073 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3075 dupfd = PerlLIO_dup(fd);
3077 result = PerlSIO_fclose(stdio);
3078 /* We treat error from stdio as success if we invalidated
3079 errno may NOT be expected EBADF
3081 if (invalidate && result != 0) {
3085 #ifdef SOCKS5_VERSION_NAME
3086 /* in SOCKS' case, let close() determine return value */
3090 PerlLIO_dup2(dupfd,fd);
3091 PerlLIO_close(dupfd);
3098 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3101 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3105 STDCHAR *buf = (STDCHAR *) vbuf;
3107 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3108 * stdio does not do that for fread()
3110 const int ch = PerlSIO_fgetc(s);
3117 got = PerlSIO_fread(vbuf, 1, count, s);
3118 if (got == 0 && PerlSIO_ferror(s))
3120 if (got >= 0 || errno != EINTR)
3123 SETERRNO(0,0); /* just in case */
3129 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3132 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3134 #ifdef STDIO_BUFFER_WRITABLE
3135 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3136 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3137 STDCHAR *base = PerlIO_get_base(f);
3138 SSize_t cnt = PerlIO_get_cnt(f);
3139 STDCHAR *ptr = PerlIO_get_ptr(f);
3140 SSize_t avail = ptr - base;
3142 if (avail > count) {
3146 Move(buf-avail,ptr,avail,STDCHAR);
3149 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3150 if (PerlSIO_feof(s) && unread >= 0)
3151 PerlSIO_clearerr(s);
3156 if (PerlIO_has_cntptr(f)) {
3157 /* We can get pointer to buffer but not its base
3158 Do ungetc() but check chars are ending up in the
3161 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3162 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3164 const int ch = *--buf & 0xFF;
3165 if (ungetc(ch,s) != ch) {
3166 /* ungetc did not work */
3169 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3170 /* Did not change pointer as expected */
3171 fgetc(s); /* get char back again */
3181 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3187 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3192 got = PerlSIO_fwrite(vbuf, 1, count,
3193 PerlIOSelf(f, PerlIOStdio)->stdio);
3194 if (got >= 0 || errno != EINTR)
3197 SETERRNO(0,0); /* just in case */
3203 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3205 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3206 PERL_UNUSED_CONTEXT;
3208 return PerlSIO_fseek(stdio, offset, whence);
3212 PerlIOStdio_tell(pTHX_ PerlIO *f)
3214 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3215 PERL_UNUSED_CONTEXT;
3217 return PerlSIO_ftell(stdio);
3221 PerlIOStdio_flush(pTHX_ PerlIO *f)
3223 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3224 PERL_UNUSED_CONTEXT;
3226 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3227 return PerlSIO_fflush(stdio);
3233 * FIXME: This discards ungetc() and pre-read stuff which is not
3234 * right if this is just a "sync" from a layer above Suspect right
3235 * design is to do _this_ but not have layer above flush this
3236 * layer read-to-read
3239 * Not writeable - sync by attempting a seek
3241 const int err = errno;
3242 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3250 PerlIOStdio_eof(pTHX_ PerlIO *f)
3252 PERL_UNUSED_CONTEXT;
3254 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3258 PerlIOStdio_error(pTHX_ PerlIO *f)
3260 PERL_UNUSED_CONTEXT;
3262 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3266 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3268 PERL_UNUSED_CONTEXT;
3270 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3274 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3276 PERL_UNUSED_CONTEXT;
3278 #ifdef HAS_SETLINEBUF
3279 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3281 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3287 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3289 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3290 return (STDCHAR*)PerlSIO_get_base(stdio);
3294 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3296 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3297 return PerlSIO_get_bufsiz(stdio);
3301 #ifdef USE_STDIO_PTR
3303 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3305 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3306 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3310 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3312 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3313 return PerlSIO_get_cnt(stdio);
3317 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3319 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3321 #ifdef STDIO_PTR_LVALUE
3322 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3323 #ifdef STDIO_PTR_LVAL_SETS_CNT
3324 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3325 assert(PerlSIO_get_cnt(stdio) == (cnt));
3328 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3330 * Setting ptr _does_ change cnt - we are done
3334 #else /* STDIO_PTR_LVALUE */
3336 #endif /* STDIO_PTR_LVALUE */
3339 * Now (or only) set cnt
3341 #ifdef STDIO_CNT_LVALUE
3342 PerlSIO_set_cnt(stdio, cnt);
3343 #else /* STDIO_CNT_LVALUE */
3344 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3345 PerlSIO_set_ptr(stdio,
3346 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3348 #else /* STDIO_PTR_LVAL_SETS_CNT */
3350 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3351 #endif /* STDIO_CNT_LVALUE */
3358 PerlIOStdio_fill(pTHX_ PerlIO *f)
3360 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3362 PERL_UNUSED_CONTEXT;
3365 * fflush()ing read-only streams can cause trouble on some stdio-s
3367 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3368 if (PerlSIO_fflush(stdio) != 0)
3371 c = PerlSIO_fgetc(stdio);
3375 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3377 #ifdef STDIO_BUFFER_WRITABLE
3378 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3379 /* Fake ungetc() to the real buffer in case system's ungetc
3382 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3383 SSize_t cnt = PerlSIO_get_cnt(stdio);
3384 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3385 if (ptr == base+1) {
3386 *--ptr = (STDCHAR) c;
3387 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3388 if (PerlSIO_feof(stdio))
3389 PerlSIO_clearerr(stdio);
3395 if (PerlIO_has_cntptr(f)) {
3397 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3404 /* An ungetc()d char is handled separately from the regular
3405 * buffer, so we stuff it in the buffer ourselves.
3406 * Should never get called as should hit code above
3408 *(--((*stdio)->_ptr)) = (unsigned char) c;
3411 /* If buffer snoop scheme above fails fall back to
3414 if (PerlSIO_ungetc(c, stdio) != c)
3422 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3423 sizeof(PerlIO_funcs),
3425 sizeof(PerlIOStdio),
3426 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3430 PerlIOBase_binmode, /* binmode */
3444 PerlIOStdio_clearerr,
3445 PerlIOStdio_setlinebuf,
3447 PerlIOStdio_get_base,
3448 PerlIOStdio_get_bufsiz,
3453 #ifdef USE_STDIO_PTR
3454 PerlIOStdio_get_ptr,
3455 PerlIOStdio_get_cnt,
3456 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3457 PerlIOStdio_set_ptrcnt,
3460 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3465 #endif /* USE_STDIO_PTR */
3468 /* Note that calls to PerlIO_exportFILE() are reversed using
3469 * PerlIO_releaseFILE(), not importFILE. */
3471 PerlIO_exportFILE(PerlIO * f, const char *mode)
3475 if (PerlIOValid(f)) {
3478 if (!mode || !*mode) {
3479 mode = PerlIO_modestr(f, buf);
3481 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3485 /* De-link any lower layers so new :stdio sticks */
3487 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3488 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3490 /* Link previous lower layers under new one */
3494 /* restore layers list */
3504 PerlIO_findFILE(PerlIO *f)
3508 if (l->tab == &PerlIO_stdio) {
3509 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3512 l = *PerlIONext(&l);
3514 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3515 return PerlIO_exportFILE(f, NULL);
3518 /* Use this to reverse PerlIO_exportFILE calls. */
3520 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3525 if (l->tab == &PerlIO_stdio) {
3526 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3527 if (s->stdio == f) {
3529 PerlIO_pop(aTHX_ p);
3538 /*--------------------------------------------------------------------------------------*/
3540 * perlio buffer layer
3544 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3546 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3547 const int fd = PerlIO_fileno(f);
3548 if (fd >= 0 && PerlLIO_isatty(fd)) {
3549 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3551 if (*PerlIONext(f)) {
3552 const Off_t posn = PerlIO_tell(PerlIONext(f));
3553 if (posn != (Off_t) - 1) {
3557 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3561 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3562 IV n, const char *mode, int fd, int imode, int perm,
3563 PerlIO *f, int narg, SV **args)
3565 if (PerlIOValid(f)) {
3566 PerlIO *next = PerlIONext(f);
3568 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3569 if (tab && tab->Open)
3571 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3573 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3578 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3580 if (*mode == IoTYPE_IMPLICIT) {
3586 if (tab && tab->Open)
3587 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3590 SETERRNO(EINVAL, LIB_INVARG);
3592 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3594 * if push fails during open, open fails. close will pop us.
3599 fd = PerlIO_fileno(f);
3600 if (init && fd == 2) {
3602 * Initial stderr is unbuffered
3604 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3606 #ifdef PERLIO_USING_CRLF
3607 # ifdef PERLIO_IS_BINMODE_FD
3608 if (PERLIO_IS_BINMODE_FD(fd))
3609 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3613 * do something about failing setmode()? --jhi
3615 PerlLIO_setmode(fd, O_BINARY);
3624 * This "flush" is akin to sfio's sync in that it handles files in either
3625 * read or write state. For write state, we put the postponed data through
3626 * the next layers. For read state, we seek() the next layers to the
3627 * offset given by current position in the buffer, and discard the buffer
3628 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3629 * in any case?). Then the pass the stick further in chain.
3632 PerlIOBuf_flush(pTHX_ PerlIO *f)
3634 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3636 PerlIO *n = PerlIONext(f);
3637 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3639 * write() the buffer
3641 const STDCHAR *buf = b->buf;
3642 const STDCHAR *p = buf;
3643 while (p < b->ptr) {
3644 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3648 else if (count < 0 || PerlIO_error(n)) {
3649 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3654 b->posn += (p - buf);
3656 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3657 STDCHAR *buf = PerlIO_get_base(f);
3659 * Note position change
3661 b->posn += (b->ptr - buf);
3662 if (b->ptr < b->end) {
3663 /* We did not consume all of it - try and seek downstream to
3664 our logical position
3666 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3667 /* Reload n as some layers may pop themselves on seek */
3668 b->posn = PerlIO_tell(n = PerlIONext(f));
3671 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3672 data is lost for good - so return saying "ok" having undone
3675 b->posn -= (b->ptr - buf);
3680 b->ptr = b->end = b->buf;
3681 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3682 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3683 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3688 /* This discards the content of the buffer after b->ptr, and rereads
3689 * the buffer from the position off in the layer downstream; here off
3690 * is at offset corresponding to b->ptr - b->buf.
3693 PerlIOBuf_fill(pTHX_ PerlIO *f)
3695 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3696 PerlIO *n = PerlIONext(f);
3699 * Down-stream flush is defined not to loose read data so is harmless.
3700 * we would not normally be fill'ing if there was data left in anycase.
3702 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3704 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3705 PerlIOBase_flush_linebuf(aTHX);
3708 PerlIO_get_base(f); /* allocate via vtable */
3710 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3712 b->ptr = b->end = b->buf;
3714 if (!PerlIOValid(n)) {
3715 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3719 if (PerlIO_fast_gets(n)) {
3721 * Layer below is also buffered. We do _NOT_ want to call its
3722 * ->Read() because that will loop till it gets what we asked for
3723 * which may hang on a pipe etc. Instead take anything it has to
3724 * hand, or ask it to fill _once_.
3726 avail = PerlIO_get_cnt(n);
3728 avail = PerlIO_fill(n);
3730 avail = PerlIO_get_cnt(n);
3732 if (!PerlIO_error(n) && PerlIO_eof(n))
3737 STDCHAR *ptr = PerlIO_get_ptr(n);
3738 const SSize_t cnt = avail;
3739 if (avail > (SSize_t)b->bufsiz)
3741 Copy(ptr, b->buf, avail, STDCHAR);
3742 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3746 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3750 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3752 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3755 b->end = b->buf + avail;
3756 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3761 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3763 if (PerlIOValid(f)) {
3764 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3767 return PerlIOBase_read(aTHX_ f, vbuf, count);
3773 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3775 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3776 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3779 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3784 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3786 * Buffer is already a read buffer, we can overwrite any chars
3787 * which have been read back to buffer start
3789 avail = (b->ptr - b->buf);
3793 * Buffer is idle, set it up so whole buffer is available for
3797 b->end = b->buf + avail;
3799 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3801 * Buffer extends _back_ from where we are now
3803 b->posn -= b->bufsiz;
3805 if (avail > (SSize_t) count) {
3807 * If we have space for more than count, just move count
3815 * In simple stdio-like ungetc() case chars will be already
3818 if (buf != b->ptr) {
3819 Copy(buf, b->ptr, avail, STDCHAR);
3823 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3827 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3833 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3835 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3836 const STDCHAR *buf = (const STDCHAR *) vbuf;
3837 const STDCHAR *flushptr = buf;
3841 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3843 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3844 if (PerlIO_flush(f) != 0) {
3848 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3849 flushptr = buf + count;
3850 while (flushptr > buf && *(flushptr - 1) != '\n')
3854 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3855 if ((SSize_t) count < avail)
3857 if (flushptr > buf && flushptr <= buf + avail)
3858 avail = flushptr - buf;
3859 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3861 Copy(buf, b->ptr, avail, STDCHAR);
3866 if (buf == flushptr)
3869 if (b->ptr >= (b->buf + b->bufsiz))
3872 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3878 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3881 if ((code = PerlIO_flush(f)) == 0) {
3882 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3883 code = PerlIO_seek(PerlIONext(f), offset, whence);
3885 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3886 b->posn = PerlIO_tell(PerlIONext(f));
3893 PerlIOBuf_tell(pTHX_ PerlIO *f)
3895 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3897 * b->posn is file position where b->buf was read, or will be written
3899 Off_t posn = b->posn;
3900 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3901 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3903 /* As O_APPEND files are normally shared in some sense it is better
3908 /* when file is NOT shared then this is sufficient */
3909 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3911 posn = b->posn = PerlIO_tell(PerlIONext(f));
3915 * If buffer is valid adjust position by amount in buffer
3917 posn += (b->ptr - b->buf);
3923 PerlIOBuf_popped(pTHX_ PerlIO *f)
3925 const IV code = PerlIOBase_popped(aTHX_ f);
3926 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3927 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3930 b->ptr = b->end = b->buf = NULL;
3931 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3936 PerlIOBuf_close(pTHX_ PerlIO *f)
3938 const IV code = PerlIOBase_close(aTHX_ f);
3939 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3940 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3943 b->ptr = b->end = b->buf = NULL;
3944 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3949 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3951 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3958 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3960 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3963 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3964 return (b->end - b->ptr);
3969 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3971 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3972 PERL_UNUSED_CONTEXT;
3977 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3979 b->buf = (STDCHAR *) & b->oneword;
3980 b->bufsiz = sizeof(b->oneword);
3982 b->end = b->ptr = b->buf;
3988 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3990 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3993 return (b->end - b->buf);
3997 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3999 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4003 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4004 assert(PerlIO_get_cnt(f) == cnt);
4005 assert(b->ptr >= b->buf);
4007 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4011 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4013 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4018 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4019 sizeof(PerlIO_funcs),
4022 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4026 PerlIOBase_binmode, /* binmode */
4040 PerlIOBase_clearerr,
4041 PerlIOBase_setlinebuf,
4046 PerlIOBuf_set_ptrcnt,
4049 /*--------------------------------------------------------------------------------------*/
4051 * Temp layer to hold unread chars when cannot do it any other way
4055 PerlIOPending_fill(pTHX_ PerlIO *f)
4058 * Should never happen
4065 PerlIOPending_close(pTHX_ PerlIO *f)
4068 * A tad tricky - flush pops us, then we close new top
4071 return PerlIO_close(f);
4075 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4078 * A tad tricky - flush pops us, then we seek new top
4081 return PerlIO_seek(f, offset, whence);
4086 PerlIOPending_flush(pTHX_ PerlIO *f)
4088 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4089 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4093 PerlIO_pop(aTHX_ f);
4098 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4104 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4109 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4111 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4112 PerlIOl * const l = PerlIOBase(f);
4114 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4115 * etc. get muddled when it changes mid-string when we auto-pop.
4117 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4118 (PerlIOBase(PerlIONext(f))->
4119 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4124 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4126 SSize_t avail = PerlIO_get_cnt(f);
4128 if ((SSize_t)count < avail)
4131 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4132 if (got >= 0 && got < (SSize_t)count) {
4133 const SSize_t more =
4134 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4135 if (more >= 0 || got == 0)
4141 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4142 sizeof(PerlIO_funcs),
4145 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4146 PerlIOPending_pushed,
4149 PerlIOBase_binmode, /* binmode */
4158 PerlIOPending_close,
4159 PerlIOPending_flush,
4163 PerlIOBase_clearerr,
4164 PerlIOBase_setlinebuf,
4169 PerlIOPending_set_ptrcnt,
4174 /*--------------------------------------------------------------------------------------*/
4176 * crlf - translation On read translate CR,LF to "\n" we do this by
4177 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4178 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4180 * c->nl points on the first byte of CR LF pair when it is temporarily
4181 * replaced by LF, or to the last CR of the buffer. In the former case
4182 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4183 * that it ends at c->nl; these two cases can be distinguished by
4184 * *c->nl. c->nl is set during _getcnt() call, and unset during
4185 * _unread() and _flush() calls.
4186 * It only matters for read operations.
4190 PerlIOBuf base; /* PerlIOBuf stuff */
4191 STDCHAR *nl; /* Position of crlf we "lied" about in the
4196 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4199 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4200 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4202 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4203 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4204 PerlIOBase(f)->flags);
4207 /* Enable the first CRLF capable layer you can find, but if none
4208 * found, the one we just pushed is fine. This results in at
4209 * any given moment at most one CRLF-capable layer being enabled
4210 * in the whole layer stack. */
4211 PerlIO *g = PerlIONext(f);
4213 PerlIOl *b = PerlIOBase(g);
4214 if (b && b->tab == &PerlIO_crlf) {
4215 if (!(b->flags & PERLIO_F_CRLF))
4216 b->flags |= PERLIO_F_CRLF;
4217 PerlIO_pop(aTHX_ f);
4228 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4230 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4231 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4235 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4236 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4238 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4239 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4241 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4246 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4247 b->end = b->ptr = b->buf + b->bufsiz;
4248 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4249 b->posn -= b->bufsiz;
4251 while (count > 0 && b->ptr > b->buf) {
4252 const int ch = *--buf;
4254 if (b->ptr - 2 >= b->buf) {
4261 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4262 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4278 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4280 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4282 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4285 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4286 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4287 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4288 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4290 while (nl < b->end && *nl != 0xd)
4292 if (nl < b->end && *nl == 0xd) {
4294 if (nl + 1 < b->end) {
4301 * Not CR,LF but just CR
4309 * Blast - found CR as last char in buffer
4314 * They may not care, defer work as long as
4318 return (nl - b->ptr);
4322 b->ptr++; /* say we have read it as far as
4323 * flush() is concerned */
4324 b->buf++; /* Leave space in front of buffer */
4325 /* Note as we have moved buf up flush's
4327 will naturally make posn point at CR
4329 b->bufsiz--; /* Buffer is thus smaller */
4330 code = PerlIO_fill(f); /* Fetch some more */
4331 b->bufsiz++; /* Restore size for next time */
4332 b->buf--; /* Point at space */
4333 b->ptr = nl = b->buf; /* Which is what we hand
4335 *nl = 0xd; /* Fill in the CR */
4337 goto test; /* fill() call worked */
4339 * CR at EOF - just fall through
4341 /* Should we clear EOF though ??? */
4346 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4352 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4354 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4355 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4361 if (ptr == b->end && *c->nl == 0xd) {
4362 /* Defered CR at end of buffer case - we lied about count */
4375 * Test code - delete when it works ...
4377 IV flags = PerlIOBase(f)->flags;
4378 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4379 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4380 /* Defered CR at end of buffer case - we lied about count */
4386 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4387 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4395 * They have taken what we lied about
4403 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4407 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4409 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4410 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4412 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4413 const STDCHAR *buf = (const STDCHAR *) vbuf;
4414 const STDCHAR * const ebuf = buf + count;
4417 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4419 while (buf < ebuf) {
4420 const STDCHAR * const eptr = b->buf + b->bufsiz;
4421 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4422 while (buf < ebuf && b->ptr < eptr) {
4424 if ((b->ptr + 2) > eptr) {
4432 *(b->ptr)++ = 0xd; /* CR */
4433 *(b->ptr)++ = 0xa; /* LF */
4435 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4442 *(b->ptr)++ = *buf++;
4444 if (b->ptr >= eptr) {
4450 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4452 return (buf - (STDCHAR *) vbuf);
4457 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4459 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4464 return PerlIOBuf_flush(aTHX_ f);
4468 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4470 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4471 /* In text mode - flush any pending stuff and flip it */
4472 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4473 #ifndef PERLIO_USING_CRLF
4474 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4475 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4476 PerlIO_pop(aTHX_ f);
4483 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4484 sizeof(PerlIO_funcs),
4487 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4489 PerlIOBuf_popped, /* popped */
4491 PerlIOCrlf_binmode, /* binmode */
4495 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4496 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4497 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4505 PerlIOBase_clearerr,
4506 PerlIOBase_setlinebuf,
4511 PerlIOCrlf_set_ptrcnt,
4515 /*--------------------------------------------------------------------------------------*/
4517 * mmap as "buffer" layer
4521 PerlIOBuf base; /* PerlIOBuf stuff */
4522 Mmap_t mptr; /* Mapped address */
4523 Size_t len; /* mapped length */
4524 STDCHAR *bbuf; /* malloced buffer if map fails */
4528 PerlIOMmap_map(pTHX_ PerlIO *f)
4531 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4532 const IV flags = PerlIOBase(f)->flags;
4536 if (flags & PERLIO_F_CANREAD) {
4537 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4538 const int fd = PerlIO_fileno(f);
4540 code = Fstat(fd, &st);
4541 if (code == 0 && S_ISREG(st.st_mode)) {
4542 SSize_t len = st.st_size - b->posn;
4545 if (PL_mmap_page_size <= 0)
4546 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4550 * This is a hack - should never happen - open should
4553 b->posn = PerlIO_tell(PerlIONext(f));
4555 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4556 len = st.st_size - posn;
4557 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4558 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4559 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4560 madvise(m->mptr, len, MADV_SEQUENTIAL);
4562 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4563 madvise(m->mptr, len, MADV_WILLNEED);
4565 PerlIOBase(f)->flags =
4566 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4567 b->end = ((STDCHAR *) m->mptr) + len;
4568 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4577 PerlIOBase(f)->flags =
4578 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4580 b->ptr = b->end = b->ptr;
4589 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4591 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4594 PerlIOBuf * const b = &m->base;
4596 code = munmap(m->mptr, m->len);
4600 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4603 b->ptr = b->end = b->buf;
4604 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4610 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4612 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4613 PerlIOBuf * const b = &m->base;
4614 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4616 * Already have a readbuffer in progress
4622 * We have a write buffer or flushed PerlIOBuf read buffer
4624 m->bbuf = b->buf; /* save it in case we need it again */
4625 b->buf = NULL; /* Clear to trigger below */
4628 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4631 * Map did not work - recover PerlIOBuf buffer if we have one
4636 b->ptr = b->end = b->buf;
4639 return PerlIOBuf_get_base(aTHX_ f);
4643 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4645 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4646 PerlIOBuf * const b = &m->base;
4647 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4649 if (b->ptr && (b->ptr - count) >= b->buf
4650 && memEQ(b->ptr - count, vbuf, count)) {
4652 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4657 * Loose the unwritable mapped buffer
4661 * If flush took the "buffer" see if we have one from before
4663 if (!b->buf && m->bbuf)
4666 PerlIOBuf_get_base(aTHX_ f);
4670 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4674 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4676 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4677 PerlIOBuf * const b = &m->base;
4679 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4681 * No, or wrong sort of, buffer
4684 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4688 * If unmap took the "buffer" see if we have one from before
4690 if (!b->buf && m->bbuf)
4693 PerlIOBuf_get_base(aTHX_ f);
4697 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4701 PerlIOMmap_flush(pTHX_ PerlIO *f)
4703 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4704 PerlIOBuf * const b = &m->base;
4705 IV code = PerlIOBuf_flush(aTHX_ f);
4707 * Now we are "synced" at PerlIOBuf level
4714 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4719 * We seem to have a PerlIOBuf buffer which was not mapped
4720 * remember it in case we need one later
4729 PerlIOMmap_fill(pTHX_ PerlIO *f)
4731 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4732 IV code = PerlIO_flush(f);
4733 if (code == 0 && !b->buf) {
4734 code = PerlIOMmap_map(aTHX_ f);
4736 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4737 code = PerlIOBuf_fill(aTHX_ f);
4743 PerlIOMmap_close(pTHX_ PerlIO *f)
4745 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4746 PerlIOBuf * const b = &m->base;
4747 IV code = PerlIO_flush(f);
4751 b->ptr = b->end = b->buf;
4753 if (PerlIOBuf_close(aTHX_ f) != 0)
4759 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4761 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4765 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4766 sizeof(PerlIO_funcs),
4769 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4773 PerlIOBase_binmode, /* binmode */
4787 PerlIOBase_clearerr,
4788 PerlIOBase_setlinebuf,
4789 PerlIOMmap_get_base,
4793 PerlIOBuf_set_ptrcnt,
4796 #endif /* HAS_MMAP */
4799 Perl_PerlIO_stdin(pTHX)
4803 PerlIO_stdstreams(aTHX);
4805 return &PL_perlio[1];
4809 Perl_PerlIO_stdout(pTHX)
4813 PerlIO_stdstreams(aTHX);
4815 return &PL_perlio[2];
4819 Perl_PerlIO_stderr(pTHX)
4823 PerlIO_stdstreams(aTHX);
4825 return &PL_perlio[3];
4828 /*--------------------------------------------------------------------------------------*/
4831 PerlIO_getname(PerlIO *f, char *buf)
4836 bool exported = FALSE;
4837 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4839 stdio = PerlIO_exportFILE(f,0);
4843 name = fgetname(stdio, buf);
4844 if (exported) PerlIO_releaseFILE(f,stdio);
4849 PERL_UNUSED_ARG(buf);
4850 Perl_croak(aTHX_ "Don't know how to get file name");
4856 /*--------------------------------------------------------------------------------------*/
4858 * Functions which can be called on any kind of PerlIO implemented in
4862 #undef PerlIO_fdopen
4864 PerlIO_fdopen(int fd, const char *mode)
4867 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4872 PerlIO_open(const char *path, const char *mode)
4875 SV *name = sv_2mortal(newSVpv(path, 0));
4876 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4879 #undef Perlio_reopen
4881 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4884 SV *name = sv_2mortal(newSVpv(path,0));
4885 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4890 PerlIO_getc(PerlIO *f)
4894 if ( 1 == PerlIO_read(f, buf, 1) ) {
4895 return (unsigned char) buf[0];
4900 #undef PerlIO_ungetc
4902 PerlIO_ungetc(PerlIO *f, int ch)
4907 if (PerlIO_unread(f, &buf, 1) == 1)
4915 PerlIO_putc(PerlIO *f, int ch)
4919 return PerlIO_write(f, &buf, 1);
4924 PerlIO_puts(PerlIO *f, const char *s)
4927 return PerlIO_write(f, s, strlen(s));
4930 #undef PerlIO_rewind
4932 PerlIO_rewind(PerlIO *f)
4935 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4939 #undef PerlIO_vprintf
4941 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4944 SV * const sv = newSVpvs("");
4950 Perl_va_copy(ap, apc);
4951 sv_vcatpvf(sv, fmt, &apc);
4953 sv_vcatpvf(sv, fmt, &ap);
4955 s = SvPV_const(sv, len);
4956 wrote = PerlIO_write(f, s, len);
4961 #undef PerlIO_printf
4963 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4968 result = PerlIO_vprintf(f, fmt, ap);
4973 #undef PerlIO_stdoutf
4975 PerlIO_stdoutf(const char *fmt, ...)
4981 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4986 #undef PerlIO_tmpfile
4988 PerlIO_tmpfile(void)
4993 const int fd = win32_tmpfd();
4995 f = PerlIO_fdopen(fd, "w+b");
4997 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4998 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5000 * I have no idea how portable mkstemp() is ... NI-S
5002 const int fd = mkstemp(SvPVX(sv));
5004 f = PerlIO_fdopen(fd, "w+");
5006 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5007 PerlLIO_unlink(SvPVX_const(sv));
5010 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5011 FILE * const stdio = PerlSIO_tmpfile();
5014 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5015 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5017 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5023 # endif /* else HAS_MKSTEMP */
5024 #endif /* else WIN32 */
5031 #endif /* USE_SFIO */
5032 #endif /* PERLIO_IS_STDIO */
5034 /*======================================================================================*/
5036 * Now some functions in terms of above which may be needed even if we are
5037 * not in true PerlIO mode
5040 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5043 const char *type = NULL;
5045 * Need to supply default layer info from open.pm
5047 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5049 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5054 type = SvPV_const(layers, len);
5055 if (type && mode && mode[0] != 'r') {
5057 * Skip to write part, which is separated by a '\0'
5059 STRLEN read_len = strlen(type);
5060 if (read_len < len) {
5061 type += read_len + 1;
5071 #undef PerlIO_setpos
5073 PerlIO_setpos(PerlIO *f, SV *pos)
5078 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5079 if (f && len == sizeof(Off_t))
5080 return PerlIO_seek(f, *posn, SEEK_SET);
5082 SETERRNO(EINVAL, SS_IVCHAN);
5086 #undef PerlIO_setpos
5088 PerlIO_setpos(PerlIO *f, SV *pos)
5093 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5094 if (f && len == sizeof(Fpos_t)) {
5095 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5096 return fsetpos64(f, fpos);
5098 return fsetpos(f, fpos);
5102 SETERRNO(EINVAL, SS_IVCHAN);
5108 #undef PerlIO_getpos
5110 PerlIO_getpos(PerlIO *f, SV *pos)
5113 Off_t posn = PerlIO_tell(f);
5114 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5115 return (posn == (Off_t) - 1) ? -1 : 0;
5118 #undef PerlIO_getpos
5120 PerlIO_getpos(PerlIO *f, SV *pos)
5125 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5126 code = fgetpos64(f, &fpos);
5128 code = fgetpos(f, &fpos);
5130 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5135 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5138 vprintf(char *pat, char *args)
5140 _doprnt(pat, args, stdout);
5141 return 0; /* wrong, but perl doesn't use the return
5146 vfprintf(FILE *fd, char *pat, char *args)
5148 _doprnt(pat, args, fd);
5149 return 0; /* wrong, but perl doesn't use the return
5155 #ifndef PerlIO_vsprintf
5157 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5160 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5161 PERL_UNUSED_CONTEXT;
5163 #ifndef PERL_MY_VSNPRINTF_GUARDED
5164 if (val < 0 || (n > 0 ? val >= n : 0)) {
5165 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5172 #ifndef PerlIO_sprintf
5174 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5179 result = PerlIO_vsprintf(s, n, fmt, ap);
5187 * c-indentation-style: bsd
5189 * indent-tabs-mode: t
5192 * ex: set ts=8 sts=4 sw=4 noet: