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 len = my_sprintf(buffer, "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
482 const STRLEN len2 = my_vsnprintf(buffer+len, sizeof(buffer) - len, fmt, ap);
483 PerlLIO_write(PL_perlio_debug_fd, buffer, len + 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 PerlIO_context_layers(pTHX_ const char *mode)
1415 const char *type = NULL;
1417 * Need to supply default layer info from open.pm
1420 SV * const layers = PL_curcop->cop_io;
1423 type = SvPV_const(layers, len);
1424 if (type && mode[0] != 'r') {
1426 * Skip to write part
1428 const char * const s = strchr(type, 0);
1429 if (s && (STRLEN)(s - type) < len) {
1438 static PerlIO_funcs *
1439 PerlIO_layer_from_ref(pTHX_ SV *sv)
1443 * For any scalar type load the handler which is bundled with perl
1445 if (SvTYPE(sv) < SVt_PVAV)
1446 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1449 * For other types allow if layer is known but don't try and load it
1451 switch (SvTYPE(sv)) {
1453 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1455 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1457 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1459 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1465 PerlIO_resolve_layers(pTHX_ const char *layers,
1466 const char *mode, int narg, SV **args)
1469 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1472 PerlIO_stdstreams(aTHX);
1474 SV * const arg = *args;
1476 * If it is a reference but not an object see if we have a handler
1479 if (SvROK(arg) && !sv_isobject(arg)) {
1480 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1482 def = PerlIO_list_alloc(aTHX);
1483 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1487 * Don't fail if handler cannot be found :via(...) etc. may do
1488 * something sensible else we will just stringfy and open
1493 if (!layers || !*layers)
1494 layers = PerlIO_context_layers(aTHX_ mode);
1495 if (layers && *layers) {
1499 av = PerlIO_list_alloc(aTHX);
1500 for (i = 0; i < def->cur; i++) {
1501 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1508 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1512 PerlIO_list_free(aTHX_ av);
1524 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1525 int imode, int perm, PerlIO *f, int narg, SV **args)
1528 if (!f && narg == 1 && *args == &PL_sv_undef) {
1529 if ((f = PerlIO_tmpfile())) {
1530 if (!layers || !*layers)
1531 layers = PerlIO_context_layers(aTHX_ mode);
1532 if (layers && *layers)
1533 PerlIO_apply_layers(aTHX_ f, mode, layers);
1537 PerlIO_list_t *layera;
1539 PerlIO_funcs *tab = NULL;
1540 if (PerlIOValid(f)) {
1542 * This is "reopen" - it is not tested as perl does not use it
1546 layera = PerlIO_list_alloc(aTHX);
1548 SV * const arg = (l->tab->Getarg)
1549 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1551 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1552 l = *PerlIONext(&l);
1556 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1562 * Start at "top" of layer stack
1564 n = layera->cur - 1;
1566 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1575 * Found that layer 'n' can do opens - call it
1577 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1578 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1580 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1581 tab->name, layers ? layers : "(Null)", mode, fd,
1582 imode, perm, (void*)f, narg, (void*)args);
1584 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1587 SETERRNO(EINVAL, LIB_INVARG);
1591 if (n + 1 < layera->cur) {
1593 * More layers above the one that we used to open -
1596 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1597 /* If pushing layers fails close the file */
1604 PerlIO_list_free(aTHX_ layera);
1611 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1613 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1617 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1619 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1623 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1625 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1629 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1631 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1635 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1637 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1641 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1646 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1648 if (tab && tab->Flush)
1649 return (*tab->Flush) (aTHX_ f);
1651 return 0; /* If no Flush defined, silently succeed. */
1654 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1655 SETERRNO(EBADF, SS_IVCHAN);
1661 * Is it good API design to do flush-all on NULL, a potentially
1662 * errorneous input? Maybe some magical value (PerlIO*
1663 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1664 * things on fflush(NULL), but should we be bound by their design
1667 PerlIO **table = &PL_perlio;
1669 while ((f = *table)) {
1671 table = (PerlIO **) (f++);
1672 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1673 if (*f && PerlIO_flush(f) != 0)
1683 PerlIOBase_flush_linebuf(pTHX)
1686 PerlIO **table = &PL_perlio;
1688 while ((f = *table)) {
1690 table = (PerlIO **) (f++);
1691 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1694 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1695 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1703 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1705 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1709 PerlIO_isutf8(PerlIO *f)
1712 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1714 SETERRNO(EBADF, SS_IVCHAN);
1720 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1722 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1726 Perl_PerlIO_error(pTHX_ PerlIO *f)
1728 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1732 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1734 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1738 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1740 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1744 PerlIO_has_base(PerlIO *f)
1746 if (PerlIOValid(f)) {
1747 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1750 return (tab->Get_base != NULL);
1751 SETERRNO(EINVAL, LIB_INVARG);
1754 SETERRNO(EBADF, SS_IVCHAN);
1760 PerlIO_fast_gets(PerlIO *f)
1762 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1763 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1766 return (tab->Set_ptrcnt != NULL);
1767 SETERRNO(EINVAL, LIB_INVARG);
1770 SETERRNO(EBADF, SS_IVCHAN);
1776 PerlIO_has_cntptr(PerlIO *f)
1778 if (PerlIOValid(f)) {
1779 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1782 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1783 SETERRNO(EINVAL, LIB_INVARG);
1786 SETERRNO(EBADF, SS_IVCHAN);
1792 PerlIO_canset_cnt(PerlIO *f)
1794 if (PerlIOValid(f)) {
1795 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1798 return (tab->Set_ptrcnt != NULL);
1799 SETERRNO(EINVAL, LIB_INVARG);
1802 SETERRNO(EBADF, SS_IVCHAN);
1808 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1810 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1814 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1816 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1820 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1822 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1826 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1828 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1832 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1834 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1838 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1840 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1844 /*--------------------------------------------------------------------------------------*/
1846 * utf8 and raw dummy layers
1850 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1852 PERL_UNUSED_CONTEXT;
1853 PERL_UNUSED_ARG(mode);
1854 PERL_UNUSED_ARG(arg);
1855 if (PerlIOValid(f)) {
1856 if (tab->kind & PERLIO_K_UTF8)
1857 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1859 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1865 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1866 sizeof(PerlIO_funcs),
1869 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1889 NULL, /* get_base */
1890 NULL, /* get_bufsiz */
1893 NULL, /* set_ptrcnt */
1896 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1897 sizeof(PerlIO_funcs),
1920 NULL, /* get_base */
1921 NULL, /* get_bufsiz */
1924 NULL, /* set_ptrcnt */
1928 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1929 IV n, const char *mode, int fd, int imode, int perm,
1930 PerlIO *old, int narg, SV **args)
1932 PerlIO_funcs * const tab = PerlIO_default_btm();
1933 PERL_UNUSED_ARG(self);
1934 if (tab && tab->Open)
1935 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1937 SETERRNO(EINVAL, LIB_INVARG);
1941 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1942 sizeof(PerlIO_funcs),
1965 NULL, /* get_base */
1966 NULL, /* get_bufsiz */
1969 NULL, /* set_ptrcnt */
1971 /*--------------------------------------------------------------------------------------*/
1972 /*--------------------------------------------------------------------------------------*/
1974 * "Methods" of the "base class"
1978 PerlIOBase_fileno(pTHX_ PerlIO *f)
1980 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1984 PerlIO_modestr(PerlIO * f, char *buf)
1987 if (PerlIOValid(f)) {
1988 const IV flags = PerlIOBase(f)->flags;
1989 if (flags & PERLIO_F_APPEND) {
1991 if (flags & PERLIO_F_CANREAD) {
1995 else if (flags & PERLIO_F_CANREAD) {
1997 if (flags & PERLIO_F_CANWRITE)
2000 else if (flags & PERLIO_F_CANWRITE) {
2002 if (flags & PERLIO_F_CANREAD) {
2006 #ifdef PERLIO_USING_CRLF
2007 if (!(flags & PERLIO_F_CRLF))
2017 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2019 PerlIOl * const l = PerlIOBase(f);
2020 PERL_UNUSED_CONTEXT;
2021 PERL_UNUSED_ARG(arg);
2023 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2024 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2025 if (tab->Set_ptrcnt != NULL)
2026 l->flags |= PERLIO_F_FASTGETS;
2028 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2032 l->flags |= PERLIO_F_CANREAD;
2035 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2038 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2041 SETERRNO(EINVAL, LIB_INVARG);
2047 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2050 l->flags &= ~PERLIO_F_CRLF;
2053 l->flags |= PERLIO_F_CRLF;
2056 SETERRNO(EINVAL, LIB_INVARG);
2063 l->flags |= l->next->flags &
2064 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2069 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2070 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2071 l->flags, PerlIO_modestr(f, temp));
2077 PerlIOBase_popped(pTHX_ PerlIO *f)
2079 PERL_UNUSED_CONTEXT;
2085 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2088 * Save the position as current head considers it
2090 const Off_t old = PerlIO_tell(f);
2091 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2092 PerlIOSelf(f, PerlIOBuf)->posn = old;
2093 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2097 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2099 STDCHAR *buf = (STDCHAR *) vbuf;
2101 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2102 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2103 SETERRNO(EBADF, SS_IVCHAN);
2109 SSize_t avail = PerlIO_get_cnt(f);
2112 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2114 STDCHAR *ptr = PerlIO_get_ptr(f);
2115 Copy(ptr, buf, take, STDCHAR);
2116 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2119 if (avail == 0) /* set_ptrcnt could have reset avail */
2122 if (count > 0 && avail <= 0) {
2123 if (PerlIO_fill(f) != 0)
2128 return (buf - (STDCHAR *) vbuf);
2134 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2136 PERL_UNUSED_CONTEXT;
2142 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2144 PERL_UNUSED_CONTEXT;
2150 PerlIOBase_close(pTHX_ PerlIO *f)
2153 if (PerlIOValid(f)) {
2154 PerlIO *n = PerlIONext(f);
2155 code = PerlIO_flush(f);
2156 PerlIOBase(f)->flags &=
2157 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2158 while (PerlIOValid(n)) {
2159 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2160 if (tab && tab->Close) {
2161 if ((*tab->Close)(aTHX_ n) != 0)
2166 PerlIOBase(n)->flags &=
2167 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2173 SETERRNO(EBADF, SS_IVCHAN);
2179 PerlIOBase_eof(pTHX_ PerlIO *f)
2181 PERL_UNUSED_CONTEXT;
2182 if (PerlIOValid(f)) {
2183 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2189 PerlIOBase_error(pTHX_ PerlIO *f)
2191 PERL_UNUSED_CONTEXT;
2192 if (PerlIOValid(f)) {
2193 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2199 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2201 if (PerlIOValid(f)) {
2202 PerlIO * const n = PerlIONext(f);
2203 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2210 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2212 PERL_UNUSED_CONTEXT;
2213 if (PerlIOValid(f)) {
2214 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2219 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2225 return sv_dup(arg, param);
2228 return newSVsv(arg);
2231 PERL_UNUSED_ARG(param);
2232 return newSVsv(arg);
2237 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2239 PerlIO * const nexto = PerlIONext(o);
2240 if (PerlIOValid(nexto)) {
2241 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2242 if (tab && tab->Dup)
2243 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2245 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2248 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2251 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2252 self->name, (void*)f, (void*)o, (void*)param);
2254 arg = (*self->Getarg)(aTHX_ o, param, flags);
2258 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2267 perl_mutex PerlIO_mutex;
2270 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2272 /* Must be called with PerlIO_mutex locked. */
2274 S_more_refcounted_fds(pTHX_ const int new_fd) {
2276 const int old_max = PL_perlio_fd_refcnt_size;
2277 const int new_max = 16 + (new_fd & ~15);
2280 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2281 old_max, new_fd, new_max);
2283 if (new_fd < old_max) {
2287 assert (new_max > new_fd);
2290 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2294 MUTEX_UNLOCK(&PerlIO_mutex);
2296 /* Can't use PerlIO to write as it allocates memory */
2297 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2298 PL_no_mem, strlen(PL_no_mem));
2302 PL_perlio_fd_refcnt_size = new_max;
2303 PL_perlio_fd_refcnt = new_array;
2305 PerlIO_debug("Zeroing %p, %d\n",
2306 (void*)(new_array + old_max),
2309 Zero(new_array + old_max, new_max - old_max, int);
2316 /* Place holder for stdstreams call ??? */
2318 MUTEX_INIT(&PerlIO_mutex);
2320 PERL_UNUSED_CONTEXT;
2325 PerlIOUnix_refcnt_inc(int fd)
2332 MUTEX_LOCK(&PerlIO_mutex);
2334 if (fd >= PL_perlio_fd_refcnt_size)
2335 S_more_refcounted_fds(aTHX_ fd);
2337 PL_perlio_fd_refcnt[fd]++;
2338 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2341 MUTEX_UNLOCK(&PerlIO_mutex);
2347 PerlIOUnix_refcnt_dec(int fd)
2354 MUTEX_LOCK(&PerlIO_mutex);
2356 /* XXX should this be a panic? */
2357 if (fd >= PL_perlio_fd_refcnt_size)
2358 S_more_refcounted_fds(aTHX_ fd);
2360 /* XXX should this be a panic if it drops below 0? */
2361 cnt = --PL_perlio_fd_refcnt[fd];
2362 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2364 MUTEX_UNLOCK(&PerlIO_mutex);
2371 PerlIO_cleanup(pTHX)
2376 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2378 PerlIO_debug("Cleanup layers\n");
2380 /* Raise STDIN..STDERR refcount so we don't close them */
2381 for (i=0; i < 3; i++)
2382 PerlIOUnix_refcnt_inc(i);
2383 PerlIO_cleantable(aTHX_ &PL_perlio);
2384 /* Restore STDIN..STDERR refcount */
2385 for (i=0; i < 3; i++)
2386 PerlIOUnix_refcnt_dec(i);
2388 if (PL_known_layers) {
2389 PerlIO_list_free(aTHX_ PL_known_layers);
2390 PL_known_layers = NULL;
2392 if (PL_def_layerlist) {
2393 PerlIO_list_free(aTHX_ PL_def_layerlist);
2394 PL_def_layerlist = NULL;
2400 /*--------------------------------------------------------------------------------------*/
2402 * Bottom-most level for UNIX-like case
2406 struct _PerlIO base; /* The generic part */
2407 int fd; /* UNIX like file descriptor */
2408 int oflags; /* open/fcntl flags */
2412 PerlIOUnix_oflags(const char *mode)
2415 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2420 if (*++mode == '+') {
2427 oflags = O_CREAT | O_TRUNC;
2428 if (*++mode == '+') {
2437 oflags = O_CREAT | O_APPEND;
2438 if (*++mode == '+') {
2451 else if (*mode == 't') {
2453 oflags &= ~O_BINARY;
2457 * Always open in binary mode
2460 if (*mode || oflags == -1) {
2461 SETERRNO(EINVAL, LIB_INVARG);
2468 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2470 PERL_UNUSED_CONTEXT;
2471 return PerlIOSelf(f, PerlIOUnix)->fd;
2475 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2477 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2480 if (PerlLIO_fstat(fd, &st) == 0) {
2481 if (!S_ISREG(st.st_mode)) {
2482 PerlIO_debug("%d is not regular file\n",fd);
2483 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2486 PerlIO_debug("%d _is_ a regular file\n",fd);
2492 PerlIOUnix_refcnt_inc(fd);
2493 PERL_UNUSED_CONTEXT;
2497 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2499 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2500 if (*PerlIONext(f)) {
2501 /* We never call down so do any pending stuff now */
2502 PerlIO_flush(PerlIONext(f));
2504 * XXX could (or should) we retrieve the oflags from the open file
2505 * handle rather than believing the "mode" we are passed in? XXX
2506 * Should the value on NULL mode be 0 or -1?
2508 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2509 mode ? PerlIOUnix_oflags(mode) : -1);
2511 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2517 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2519 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2521 PERL_UNUSED_CONTEXT;
2522 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2524 SETERRNO(ESPIPE, LIB_INVARG);
2526 SETERRNO(EINVAL, LIB_INVARG);
2530 new_loc = PerlLIO_lseek(fd, offset, whence);
2531 if (new_loc == (Off_t) - 1)
2533 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2538 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2539 IV n, const char *mode, int fd, int imode,
2540 int perm, PerlIO *f, int narg, SV **args)
2542 if (PerlIOValid(f)) {
2543 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2544 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2547 if (*mode == IoTYPE_NUMERIC)
2550 imode = PerlIOUnix_oflags(mode);
2554 const char *path = SvPV_nolen_const(*args);
2555 fd = PerlLIO_open3(path, imode, perm);
2559 if (*mode == IoTYPE_IMPLICIT)
2562 f = PerlIO_allocate(aTHX);
2564 if (!PerlIOValid(f)) {
2565 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2569 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2570 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2571 if (*mode == IoTYPE_APPEND)
2572 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2579 * FIXME: pop layers ???
2587 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2589 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2591 if (flags & PERLIO_DUP_FD) {
2592 fd = PerlLIO_dup(fd);
2595 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2597 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2598 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2607 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2610 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2611 #ifdef PERLIO_STD_SPECIAL
2613 return PERLIO_STD_IN(fd, vbuf, count);
2615 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2616 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2620 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2621 if (len >= 0 || errno != EINTR) {
2623 if (errno != EAGAIN) {
2624 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2627 else if (len == 0 && count != 0) {
2628 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2639 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2642 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2643 #ifdef PERLIO_STD_SPECIAL
2644 if (fd == 1 || fd == 2)
2645 return PERLIO_STD_OUT(fd, vbuf, count);
2648 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2649 if (len >= 0 || errno != EINTR) {
2651 if (errno != EAGAIN) {
2652 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2663 PerlIOUnix_tell(pTHX_ PerlIO *f)
2665 PERL_UNUSED_CONTEXT;
2667 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2672 PerlIOUnix_close(pTHX_ PerlIO *f)
2675 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2677 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2678 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2679 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2684 SETERRNO(EBADF,SS_IVCHAN);
2687 while (PerlLIO_close(fd) != 0) {
2688 if (errno != EINTR) {
2695 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2700 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2701 sizeof(PerlIO_funcs),
2708 PerlIOBase_binmode, /* binmode */
2718 PerlIOBase_noop_ok, /* flush */
2719 PerlIOBase_noop_fail, /* fill */
2722 PerlIOBase_clearerr,
2723 PerlIOBase_setlinebuf,
2724 NULL, /* get_base */
2725 NULL, /* get_bufsiz */
2728 NULL, /* set_ptrcnt */
2731 /*--------------------------------------------------------------------------------------*/
2736 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2737 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2738 broken by the last second glibc 2.3 fix
2740 #define STDIO_BUFFER_WRITABLE
2745 struct _PerlIO base;
2746 FILE *stdio; /* The stream */
2750 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2752 PERL_UNUSED_CONTEXT;
2754 if (PerlIOValid(f)) {
2755 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2757 return PerlSIO_fileno(s);
2764 PerlIOStdio_mode(const char *mode, char *tmode)
2766 char * const ret = tmode;
2772 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2780 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2783 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2784 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2785 if (toptab == tab) {
2786 /* Top is already stdio - pop self (duplicate) and use original */
2787 PerlIO_pop(aTHX_ f);
2790 const int fd = PerlIO_fileno(n);
2793 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2794 mode = PerlIOStdio_mode(mode, tmode)))) {
2795 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2796 /* We never call down so do any pending stuff now */
2797 PerlIO_flush(PerlIONext(f));
2804 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2809 PerlIO_importFILE(FILE *stdio, const char *mode)
2815 if (!mode || !*mode) {
2816 /* We need to probe to see how we can open the stream
2817 so start with read/write and then try write and read
2818 we dup() so that we can fclose without loosing the fd.
2820 Note that the errno value set by a failing fdopen
2821 varies between stdio implementations.
2823 const int fd = PerlLIO_dup(fileno(stdio));
2824 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2826 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2829 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2832 /* Don't seem to be able to open */
2838 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2839 s = PerlIOSelf(f, PerlIOStdio);
2847 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2848 IV n, const char *mode, int fd, int imode,
2849 int perm, PerlIO *f, int narg, SV **args)
2852 if (PerlIOValid(f)) {
2853 const char * const path = SvPV_nolen_const(*args);
2854 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2856 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2857 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2862 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2867 const char * const path = SvPV_nolen_const(*args);
2868 if (*mode == IoTYPE_NUMERIC) {
2870 fd = PerlLIO_open3(path, imode, perm);
2874 bool appended = FALSE;
2876 /* Cygwin wants its 'b' early. */
2878 mode = PerlIOStdio_mode(mode, tmode);
2880 stdio = PerlSIO_fopen(path, mode);
2883 f = PerlIO_allocate(aTHX);
2886 mode = PerlIOStdio_mode(mode, tmode);
2887 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2889 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2890 PerlIOUnix_refcnt_inc(fileno(stdio));
2892 PerlSIO_fclose(stdio);
2904 if (*mode == IoTYPE_IMPLICIT) {
2911 stdio = PerlSIO_stdin;
2914 stdio = PerlSIO_stdout;
2917 stdio = PerlSIO_stderr;
2922 stdio = PerlSIO_fdopen(fd, mode =
2923 PerlIOStdio_mode(mode, tmode));
2927 f = PerlIO_allocate(aTHX);
2929 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2930 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2931 PerlIOUnix_refcnt_inc(fileno(stdio));
2941 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2943 /* This assumes no layers underneath - which is what
2944 happens, but is not how I remember it. NI-S 2001/10/16
2946 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2947 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2948 const int fd = fileno(stdio);
2950 if (flags & PERLIO_DUP_FD) {
2951 const int dfd = PerlLIO_dup(fileno(stdio));
2953 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2958 /* FIXME: To avoid messy error recovery if dup fails
2959 re-use the existing stdio as though flag was not set
2963 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2965 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2966 PerlIOUnix_refcnt_inc(fileno(stdio));
2972 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2974 PERL_UNUSED_CONTEXT;
2976 /* XXX this could use PerlIO_canset_fileno() and
2977 * PerlIO_set_fileno() support from Configure
2979 # if defined(__UCLIBC__)
2980 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2983 # elif defined(__GLIBC__)
2984 /* There may be a better way for GLIBC:
2985 - libio.h defines a flag to not close() on cleanup
2989 # elif defined(__sun__)
2991 # elif defined(__hpux)
2995 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2996 your platform does not have special entry try this one.
2997 [For OSF only have confirmation for Tru64 (alpha)
2998 but assume other OSFs will be similar.]
3000 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3003 # elif defined(__FreeBSD__)
3004 /* There may be a better way on FreeBSD:
3005 - we could insert a dummy func in the _close function entry
3006 f->_close = (int (*)(void *)) dummy_close;
3010 # elif defined(__OpenBSD__)
3011 /* There may be a better way on OpenBSD:
3012 - we could insert a dummy func in the _close function entry
3013 f->_close = (int (*)(void *)) dummy_close;
3017 # elif defined(__EMX__)
3018 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3021 # elif defined(__CYGWIN__)
3022 /* There may be a better way on CYGWIN:
3023 - we could insert a dummy func in the _close function entry
3024 f->_close = (int (*)(void *)) dummy_close;
3028 # elif defined(WIN32)
3029 # if defined(__BORLANDC__)
3030 f->fd = PerlLIO_dup(fileno(f));
3031 # elif defined(UNDER_CE)
3032 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3041 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3042 (which isn't thread safe) instead
3044 # error "Don't know how to set FILE.fileno on your platform"
3052 PerlIOStdio_close(pTHX_ PerlIO *f)
3054 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3060 const int fd = fileno(stdio);
3065 #ifdef SOCKS5_VERSION_NAME
3066 /* Socks lib overrides close() but stdio isn't linked to
3067 that library (though we are) - so we must call close()
3068 on sockets on stdio's behalf.
3071 Sock_size_t optlen = sizeof(int);
3072 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3075 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3078 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3079 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3081 if (stdio == stdout || stdio == stderr)
3082 return PerlIO_flush(f);
3083 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3084 Use Sarathy's trick from maint-5.6 to invalidate the
3085 fileno slot of the FILE *
3087 result = PerlIO_flush(f);
3089 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3091 dupfd = PerlLIO_dup(fd);
3093 result = PerlSIO_fclose(stdio);
3094 /* We treat error from stdio as success if we invalidated
3095 errno may NOT be expected EBADF
3097 if (invalidate && result != 0) {
3101 #ifdef SOCKS5_VERSION_NAME
3102 /* in SOCKS' case, let close() determine return value */
3106 PerlLIO_dup2(dupfd,fd);
3107 PerlLIO_close(dupfd);
3114 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3117 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3121 STDCHAR *buf = (STDCHAR *) vbuf;
3123 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3124 * stdio does not do that for fread()
3126 const int ch = PerlSIO_fgetc(s);
3133 got = PerlSIO_fread(vbuf, 1, count, s);
3134 if (got == 0 && PerlSIO_ferror(s))
3136 if (got >= 0 || errno != EINTR)
3139 SETERRNO(0,0); /* just in case */
3145 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3148 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3150 #ifdef STDIO_BUFFER_WRITABLE
3151 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3152 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3153 STDCHAR *base = PerlIO_get_base(f);
3154 SSize_t cnt = PerlIO_get_cnt(f);
3155 STDCHAR *ptr = PerlIO_get_ptr(f);
3156 SSize_t avail = ptr - base;
3158 if (avail > count) {
3162 Move(buf-avail,ptr,avail,STDCHAR);
3165 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3166 if (PerlSIO_feof(s) && unread >= 0)
3167 PerlSIO_clearerr(s);
3172 if (PerlIO_has_cntptr(f)) {
3173 /* We can get pointer to buffer but not its base
3174 Do ungetc() but check chars are ending up in the
3177 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3178 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3180 const int ch = *--buf & 0xFF;
3181 if (ungetc(ch,s) != ch) {
3182 /* ungetc did not work */
3185 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3186 /* Did not change pointer as expected */
3187 fgetc(s); /* get char back again */
3197 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3203 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3208 got = PerlSIO_fwrite(vbuf, 1, count,
3209 PerlIOSelf(f, PerlIOStdio)->stdio);
3210 if (got >= 0 || errno != EINTR)
3213 SETERRNO(0,0); /* just in case */
3219 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3221 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3222 PERL_UNUSED_CONTEXT;
3224 return PerlSIO_fseek(stdio, offset, whence);
3228 PerlIOStdio_tell(pTHX_ PerlIO *f)
3230 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3231 PERL_UNUSED_CONTEXT;
3233 return PerlSIO_ftell(stdio);
3237 PerlIOStdio_flush(pTHX_ PerlIO *f)
3239 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3240 PERL_UNUSED_CONTEXT;
3242 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3243 return PerlSIO_fflush(stdio);
3249 * FIXME: This discards ungetc() and pre-read stuff which is not
3250 * right if this is just a "sync" from a layer above Suspect right
3251 * design is to do _this_ but not have layer above flush this
3252 * layer read-to-read
3255 * Not writeable - sync by attempting a seek
3257 const int err = errno;
3258 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3266 PerlIOStdio_eof(pTHX_ PerlIO *f)
3268 PERL_UNUSED_CONTEXT;
3270 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3274 PerlIOStdio_error(pTHX_ PerlIO *f)
3276 PERL_UNUSED_CONTEXT;
3278 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3282 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3284 PERL_UNUSED_CONTEXT;
3286 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3290 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3292 PERL_UNUSED_CONTEXT;
3294 #ifdef HAS_SETLINEBUF
3295 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3297 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3303 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3305 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3306 return (STDCHAR*)PerlSIO_get_base(stdio);
3310 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3312 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3313 return PerlSIO_get_bufsiz(stdio);
3317 #ifdef USE_STDIO_PTR
3319 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3321 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3322 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3326 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3328 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3329 return PerlSIO_get_cnt(stdio);
3333 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3335 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3337 #ifdef STDIO_PTR_LVALUE
3338 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3339 #ifdef STDIO_PTR_LVAL_SETS_CNT
3340 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3341 assert(PerlSIO_get_cnt(stdio) == (cnt));
3344 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3346 * Setting ptr _does_ change cnt - we are done
3350 #else /* STDIO_PTR_LVALUE */
3352 #endif /* STDIO_PTR_LVALUE */
3355 * Now (or only) set cnt
3357 #ifdef STDIO_CNT_LVALUE
3358 PerlSIO_set_cnt(stdio, cnt);
3359 #else /* STDIO_CNT_LVALUE */
3360 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3361 PerlSIO_set_ptr(stdio,
3362 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3364 #else /* STDIO_PTR_LVAL_SETS_CNT */
3366 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3367 #endif /* STDIO_CNT_LVALUE */
3374 PerlIOStdio_fill(pTHX_ PerlIO *f)
3376 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3378 PERL_UNUSED_CONTEXT;
3381 * fflush()ing read-only streams can cause trouble on some stdio-s
3383 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3384 if (PerlSIO_fflush(stdio) != 0)
3387 c = PerlSIO_fgetc(stdio);
3391 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3393 #ifdef STDIO_BUFFER_WRITABLE
3394 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3395 /* Fake ungetc() to the real buffer in case system's ungetc
3398 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3399 SSize_t cnt = PerlSIO_get_cnt(stdio);
3400 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3401 if (ptr == base+1) {
3402 *--ptr = (STDCHAR) c;
3403 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3404 if (PerlSIO_feof(stdio))
3405 PerlSIO_clearerr(stdio);
3411 if (PerlIO_has_cntptr(f)) {
3413 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3420 /* An ungetc()d char is handled separately from the regular
3421 * buffer, so we stuff it in the buffer ourselves.
3422 * Should never get called as should hit code above
3424 *(--((*stdio)->_ptr)) = (unsigned char) c;
3427 /* If buffer snoop scheme above fails fall back to
3430 if (PerlSIO_ungetc(c, stdio) != c)
3438 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3439 sizeof(PerlIO_funcs),
3441 sizeof(PerlIOStdio),
3442 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3446 PerlIOBase_binmode, /* binmode */
3460 PerlIOStdio_clearerr,
3461 PerlIOStdio_setlinebuf,
3463 PerlIOStdio_get_base,
3464 PerlIOStdio_get_bufsiz,
3469 #ifdef USE_STDIO_PTR
3470 PerlIOStdio_get_ptr,
3471 PerlIOStdio_get_cnt,
3472 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3473 PerlIOStdio_set_ptrcnt,
3476 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3481 #endif /* USE_STDIO_PTR */
3484 /* Note that calls to PerlIO_exportFILE() are reversed using
3485 * PerlIO_releaseFILE(), not importFILE. */
3487 PerlIO_exportFILE(PerlIO * f, const char *mode)
3491 if (PerlIOValid(f)) {
3494 if (!mode || !*mode) {
3495 mode = PerlIO_modestr(f, buf);
3497 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3501 /* De-link any lower layers so new :stdio sticks */
3503 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3504 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3506 /* Link previous lower layers under new one */
3510 /* restore layers list */
3520 PerlIO_findFILE(PerlIO *f)
3524 if (l->tab == &PerlIO_stdio) {
3525 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3528 l = *PerlIONext(&l);
3530 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3531 return PerlIO_exportFILE(f, NULL);
3534 /* Use this to reverse PerlIO_exportFILE calls. */
3536 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3541 if (l->tab == &PerlIO_stdio) {
3542 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3543 if (s->stdio == f) {
3545 PerlIO_pop(aTHX_ p);
3554 /*--------------------------------------------------------------------------------------*/
3556 * perlio buffer layer
3560 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3562 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3563 const int fd = PerlIO_fileno(f);
3564 if (fd >= 0 && PerlLIO_isatty(fd)) {
3565 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3567 if (*PerlIONext(f)) {
3568 const Off_t posn = PerlIO_tell(PerlIONext(f));
3569 if (posn != (Off_t) - 1) {
3573 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3577 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3578 IV n, const char *mode, int fd, int imode, int perm,
3579 PerlIO *f, int narg, SV **args)
3581 if (PerlIOValid(f)) {
3582 PerlIO *next = PerlIONext(f);
3584 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3585 if (tab && tab->Open)
3587 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3589 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3594 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3596 if (*mode == IoTYPE_IMPLICIT) {
3602 if (tab && tab->Open)
3603 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3606 SETERRNO(EINVAL, LIB_INVARG);
3608 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3610 * if push fails during open, open fails. close will pop us.
3615 fd = PerlIO_fileno(f);
3616 if (init && fd == 2) {
3618 * Initial stderr is unbuffered
3620 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3622 #ifdef PERLIO_USING_CRLF
3623 # ifdef PERLIO_IS_BINMODE_FD
3624 if (PERLIO_IS_BINMODE_FD(fd))
3625 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3629 * do something about failing setmode()? --jhi
3631 PerlLIO_setmode(fd, O_BINARY);
3640 * This "flush" is akin to sfio's sync in that it handles files in either
3641 * read or write state. For write state, we put the postponed data through
3642 * the next layers. For read state, we seek() the next layers to the
3643 * offset given by current position in the buffer, and discard the buffer
3644 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3645 * in any case?). Then the pass the stick further in chain.
3648 PerlIOBuf_flush(pTHX_ PerlIO *f)
3650 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3652 PerlIO *n = PerlIONext(f);
3653 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3655 * write() the buffer
3657 const STDCHAR *buf = b->buf;
3658 const STDCHAR *p = buf;
3659 while (p < b->ptr) {
3660 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3664 else if (count < 0 || PerlIO_error(n)) {
3665 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3670 b->posn += (p - buf);
3672 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3673 STDCHAR *buf = PerlIO_get_base(f);
3675 * Note position change
3677 b->posn += (b->ptr - buf);
3678 if (b->ptr < b->end) {
3679 /* We did not consume all of it - try and seek downstream to
3680 our logical position
3682 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3683 /* Reload n as some layers may pop themselves on seek */
3684 b->posn = PerlIO_tell(n = PerlIONext(f));
3687 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3688 data is lost for good - so return saying "ok" having undone
3691 b->posn -= (b->ptr - buf);
3696 b->ptr = b->end = b->buf;
3697 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3698 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3699 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3704 /* This discards the content of the buffer after b->ptr, and rereads
3705 * the buffer from the position off in the layer downstream; here off
3706 * is at offset corresponding to b->ptr - b->buf.
3709 PerlIOBuf_fill(pTHX_ PerlIO *f)
3711 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3712 PerlIO *n = PerlIONext(f);
3715 * Down-stream flush is defined not to loose read data so is harmless.
3716 * we would not normally be fill'ing if there was data left in anycase.
3718 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3720 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3721 PerlIOBase_flush_linebuf(aTHX);
3724 PerlIO_get_base(f); /* allocate via vtable */
3726 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3728 b->ptr = b->end = b->buf;
3730 if (!PerlIOValid(n)) {
3731 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3735 if (PerlIO_fast_gets(n)) {
3737 * Layer below is also buffered. We do _NOT_ want to call its
3738 * ->Read() because that will loop till it gets what we asked for
3739 * which may hang on a pipe etc. Instead take anything it has to
3740 * hand, or ask it to fill _once_.
3742 avail = PerlIO_get_cnt(n);
3744 avail = PerlIO_fill(n);
3746 avail = PerlIO_get_cnt(n);
3748 if (!PerlIO_error(n) && PerlIO_eof(n))
3753 STDCHAR *ptr = PerlIO_get_ptr(n);
3754 const SSize_t cnt = avail;
3755 if (avail > (SSize_t)b->bufsiz)
3757 Copy(ptr, b->buf, avail, STDCHAR);
3758 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3762 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3766 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3768 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3771 b->end = b->buf + avail;
3772 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3777 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3779 if (PerlIOValid(f)) {
3780 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3783 return PerlIOBase_read(aTHX_ f, vbuf, count);
3789 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3791 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3792 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3795 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3800 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3802 * Buffer is already a read buffer, we can overwrite any chars
3803 * which have been read back to buffer start
3805 avail = (b->ptr - b->buf);
3809 * Buffer is idle, set it up so whole buffer is available for
3813 b->end = b->buf + avail;
3815 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3817 * Buffer extends _back_ from where we are now
3819 b->posn -= b->bufsiz;
3821 if (avail > (SSize_t) count) {
3823 * If we have space for more than count, just move count
3831 * In simple stdio-like ungetc() case chars will be already
3834 if (buf != b->ptr) {
3835 Copy(buf, b->ptr, avail, STDCHAR);
3839 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3843 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3849 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3851 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3852 const STDCHAR *buf = (const STDCHAR *) vbuf;
3853 const STDCHAR *flushptr = buf;
3857 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3859 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3860 if (PerlIO_flush(f) != 0) {
3864 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3865 flushptr = buf + count;
3866 while (flushptr > buf && *(flushptr - 1) != '\n')
3870 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3871 if ((SSize_t) count < avail)
3873 if (flushptr > buf && flushptr <= buf + avail)
3874 avail = flushptr - buf;
3875 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3877 Copy(buf, b->ptr, avail, STDCHAR);
3882 if (buf == flushptr)
3885 if (b->ptr >= (b->buf + b->bufsiz))
3888 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3894 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3897 if ((code = PerlIO_flush(f)) == 0) {
3898 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3899 code = PerlIO_seek(PerlIONext(f), offset, whence);
3901 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3902 b->posn = PerlIO_tell(PerlIONext(f));
3909 PerlIOBuf_tell(pTHX_ PerlIO *f)
3911 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3913 * b->posn is file position where b->buf was read, or will be written
3915 Off_t posn = b->posn;
3916 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3917 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3919 /* As O_APPEND files are normally shared in some sense it is better
3924 /* when file is NOT shared then this is sufficient */
3925 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3927 posn = b->posn = PerlIO_tell(PerlIONext(f));
3931 * If buffer is valid adjust position by amount in buffer
3933 posn += (b->ptr - b->buf);
3939 PerlIOBuf_popped(pTHX_ PerlIO *f)
3941 const IV code = PerlIOBase_popped(aTHX_ f);
3942 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3943 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3946 b->ptr = b->end = b->buf = NULL;
3947 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3952 PerlIOBuf_close(pTHX_ PerlIO *f)
3954 const IV code = PerlIOBase_close(aTHX_ f);
3955 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3956 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3959 b->ptr = b->end = b->buf = NULL;
3960 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3965 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3967 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3974 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3976 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3979 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3980 return (b->end - b->ptr);
3985 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3987 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3988 PERL_UNUSED_CONTEXT;
3993 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3995 b->buf = (STDCHAR *) & b->oneword;
3996 b->bufsiz = sizeof(b->oneword);
3998 b->end = b->ptr = b->buf;
4004 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4006 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4009 return (b->end - b->buf);
4013 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4015 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4019 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4020 assert(PerlIO_get_cnt(f) == cnt);
4021 assert(b->ptr >= b->buf);
4023 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4027 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4029 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4034 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4035 sizeof(PerlIO_funcs),
4038 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4042 PerlIOBase_binmode, /* binmode */
4056 PerlIOBase_clearerr,
4057 PerlIOBase_setlinebuf,
4062 PerlIOBuf_set_ptrcnt,
4065 /*--------------------------------------------------------------------------------------*/
4067 * Temp layer to hold unread chars when cannot do it any other way
4071 PerlIOPending_fill(pTHX_ PerlIO *f)
4074 * Should never happen
4081 PerlIOPending_close(pTHX_ PerlIO *f)
4084 * A tad tricky - flush pops us, then we close new top
4087 return PerlIO_close(f);
4091 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4094 * A tad tricky - flush pops us, then we seek new top
4097 return PerlIO_seek(f, offset, whence);
4102 PerlIOPending_flush(pTHX_ PerlIO *f)
4104 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4105 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4109 PerlIO_pop(aTHX_ f);
4114 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4120 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4125 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4127 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4128 PerlIOl * const l = PerlIOBase(f);
4130 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4131 * etc. get muddled when it changes mid-string when we auto-pop.
4133 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4134 (PerlIOBase(PerlIONext(f))->
4135 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4140 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4142 SSize_t avail = PerlIO_get_cnt(f);
4144 if ((SSize_t)count < avail)
4147 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4148 if (got >= 0 && got < (SSize_t)count) {
4149 const SSize_t more =
4150 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4151 if (more >= 0 || got == 0)
4157 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4158 sizeof(PerlIO_funcs),
4161 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4162 PerlIOPending_pushed,
4165 PerlIOBase_binmode, /* binmode */
4174 PerlIOPending_close,
4175 PerlIOPending_flush,
4179 PerlIOBase_clearerr,
4180 PerlIOBase_setlinebuf,
4185 PerlIOPending_set_ptrcnt,
4190 /*--------------------------------------------------------------------------------------*/
4192 * crlf - translation On read translate CR,LF to "\n" we do this by
4193 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4194 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4196 * c->nl points on the first byte of CR LF pair when it is temporarily
4197 * replaced by LF, or to the last CR of the buffer. In the former case
4198 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4199 * that it ends at c->nl; these two cases can be distinguished by
4200 * *c->nl. c->nl is set during _getcnt() call, and unset during
4201 * _unread() and _flush() calls.
4202 * It only matters for read operations.
4206 PerlIOBuf base; /* PerlIOBuf stuff */
4207 STDCHAR *nl; /* Position of crlf we "lied" about in the
4212 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4215 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4216 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4218 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4219 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4220 PerlIOBase(f)->flags);
4223 /* Enable the first CRLF capable layer you can find, but if none
4224 * found, the one we just pushed is fine. This results in at
4225 * any given moment at most one CRLF-capable layer being enabled
4226 * in the whole layer stack. */
4227 PerlIO *g = PerlIONext(f);
4229 PerlIOl *b = PerlIOBase(g);
4230 if (b && b->tab == &PerlIO_crlf) {
4231 if (!(b->flags & PERLIO_F_CRLF))
4232 b->flags |= PERLIO_F_CRLF;
4233 PerlIO_pop(aTHX_ f);
4244 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4246 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4247 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4251 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4252 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4254 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4255 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4257 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4262 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4263 b->end = b->ptr = b->buf + b->bufsiz;
4264 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4265 b->posn -= b->bufsiz;
4267 while (count > 0 && b->ptr > b->buf) {
4268 const int ch = *--buf;
4270 if (b->ptr - 2 >= b->buf) {
4277 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4278 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4294 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4296 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4298 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4301 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4302 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4303 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4304 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4306 while (nl < b->end && *nl != 0xd)
4308 if (nl < b->end && *nl == 0xd) {
4310 if (nl + 1 < b->end) {
4317 * Not CR,LF but just CR
4325 * Blast - found CR as last char in buffer
4330 * They may not care, defer work as long as
4334 return (nl - b->ptr);
4338 b->ptr++; /* say we have read it as far as
4339 * flush() is concerned */
4340 b->buf++; /* Leave space in front of buffer */
4341 /* Note as we have moved buf up flush's
4343 will naturally make posn point at CR
4345 b->bufsiz--; /* Buffer is thus smaller */
4346 code = PerlIO_fill(f); /* Fetch some more */
4347 b->bufsiz++; /* Restore size for next time */
4348 b->buf--; /* Point at space */
4349 b->ptr = nl = b->buf; /* Which is what we hand
4351 *nl = 0xd; /* Fill in the CR */
4353 goto test; /* fill() call worked */
4355 * CR at EOF - just fall through
4357 /* Should we clear EOF though ??? */
4362 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4368 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4370 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4371 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4377 if (ptr == b->end && *c->nl == 0xd) {
4378 /* Defered CR at end of buffer case - we lied about count */
4391 * Test code - delete when it works ...
4393 IV flags = PerlIOBase(f)->flags;
4394 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4395 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4396 /* Defered CR at end of buffer case - we lied about count */
4402 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4403 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4411 * They have taken what we lied about
4419 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4423 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4425 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4426 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4428 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4429 const STDCHAR *buf = (const STDCHAR *) vbuf;
4430 const STDCHAR * const ebuf = buf + count;
4433 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4435 while (buf < ebuf) {
4436 const STDCHAR * const eptr = b->buf + b->bufsiz;
4437 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4438 while (buf < ebuf && b->ptr < eptr) {
4440 if ((b->ptr + 2) > eptr) {
4448 *(b->ptr)++ = 0xd; /* CR */
4449 *(b->ptr)++ = 0xa; /* LF */
4451 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4458 *(b->ptr)++ = *buf++;
4460 if (b->ptr >= eptr) {
4466 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4468 return (buf - (STDCHAR *) vbuf);
4473 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4475 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4480 return PerlIOBuf_flush(aTHX_ f);
4484 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4486 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4487 /* In text mode - flush any pending stuff and flip it */
4488 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4489 #ifndef PERLIO_USING_CRLF
4490 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4491 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4492 PerlIO_pop(aTHX_ f);
4499 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4500 sizeof(PerlIO_funcs),
4503 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4505 PerlIOBuf_popped, /* popped */
4507 PerlIOCrlf_binmode, /* binmode */
4511 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4512 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4513 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4521 PerlIOBase_clearerr,
4522 PerlIOBase_setlinebuf,
4527 PerlIOCrlf_set_ptrcnt,
4531 /*--------------------------------------------------------------------------------------*/
4533 * mmap as "buffer" layer
4537 PerlIOBuf base; /* PerlIOBuf stuff */
4538 Mmap_t mptr; /* Mapped address */
4539 Size_t len; /* mapped length */
4540 STDCHAR *bbuf; /* malloced buffer if map fails */
4544 PerlIOMmap_map(pTHX_ PerlIO *f)
4547 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4548 const IV flags = PerlIOBase(f)->flags;
4552 if (flags & PERLIO_F_CANREAD) {
4553 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4554 const int fd = PerlIO_fileno(f);
4556 code = Fstat(fd, &st);
4557 if (code == 0 && S_ISREG(st.st_mode)) {
4558 SSize_t len = st.st_size - b->posn;
4561 if (PL_mmap_page_size <= 0)
4562 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4566 * This is a hack - should never happen - open should
4569 b->posn = PerlIO_tell(PerlIONext(f));
4571 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4572 len = st.st_size - posn;
4573 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4574 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4575 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4576 madvise(m->mptr, len, MADV_SEQUENTIAL);
4578 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4579 madvise(m->mptr, len, MADV_WILLNEED);
4581 PerlIOBase(f)->flags =
4582 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4583 b->end = ((STDCHAR *) m->mptr) + len;
4584 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4593 PerlIOBase(f)->flags =
4594 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4596 b->ptr = b->end = b->ptr;
4605 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4607 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4610 PerlIOBuf * const b = &m->base;
4612 code = munmap(m->mptr, m->len);
4616 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4619 b->ptr = b->end = b->buf;
4620 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4626 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4628 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4629 PerlIOBuf * const b = &m->base;
4630 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4632 * Already have a readbuffer in progress
4638 * We have a write buffer or flushed PerlIOBuf read buffer
4640 m->bbuf = b->buf; /* save it in case we need it again */
4641 b->buf = NULL; /* Clear to trigger below */
4644 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4647 * Map did not work - recover PerlIOBuf buffer if we have one
4652 b->ptr = b->end = b->buf;
4655 return PerlIOBuf_get_base(aTHX_ f);
4659 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4661 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4662 PerlIOBuf * const b = &m->base;
4663 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4665 if (b->ptr && (b->ptr - count) >= b->buf
4666 && memEQ(b->ptr - count, vbuf, count)) {
4668 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4673 * Loose the unwritable mapped buffer
4677 * If flush took the "buffer" see if we have one from before
4679 if (!b->buf && m->bbuf)
4682 PerlIOBuf_get_base(aTHX_ f);
4686 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4690 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4692 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4693 PerlIOBuf * const b = &m->base;
4695 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4697 * No, or wrong sort of, buffer
4700 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4704 * If unmap took the "buffer" see if we have one from before
4706 if (!b->buf && m->bbuf)
4709 PerlIOBuf_get_base(aTHX_ f);
4713 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4717 PerlIOMmap_flush(pTHX_ PerlIO *f)
4719 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4720 PerlIOBuf * const b = &m->base;
4721 IV code = PerlIOBuf_flush(aTHX_ f);
4723 * Now we are "synced" at PerlIOBuf level
4730 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4735 * We seem to have a PerlIOBuf buffer which was not mapped
4736 * remember it in case we need one later
4745 PerlIOMmap_fill(pTHX_ PerlIO *f)
4747 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4748 IV code = PerlIO_flush(f);
4749 if (code == 0 && !b->buf) {
4750 code = PerlIOMmap_map(aTHX_ f);
4752 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4753 code = PerlIOBuf_fill(aTHX_ f);
4759 PerlIOMmap_close(pTHX_ PerlIO *f)
4761 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4762 PerlIOBuf * const b = &m->base;
4763 IV code = PerlIO_flush(f);
4767 b->ptr = b->end = b->buf;
4769 if (PerlIOBuf_close(aTHX_ f) != 0)
4775 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4777 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4781 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4782 sizeof(PerlIO_funcs),
4785 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4789 PerlIOBase_binmode, /* binmode */
4803 PerlIOBase_clearerr,
4804 PerlIOBase_setlinebuf,
4805 PerlIOMmap_get_base,
4809 PerlIOBuf_set_ptrcnt,
4812 #endif /* HAS_MMAP */
4815 Perl_PerlIO_stdin(pTHX)
4819 PerlIO_stdstreams(aTHX);
4821 return &PL_perlio[1];
4825 Perl_PerlIO_stdout(pTHX)
4829 PerlIO_stdstreams(aTHX);
4831 return &PL_perlio[2];
4835 Perl_PerlIO_stderr(pTHX)
4839 PerlIO_stdstreams(aTHX);
4841 return &PL_perlio[3];
4844 /*--------------------------------------------------------------------------------------*/
4847 PerlIO_getname(PerlIO *f, char *buf)
4852 bool exported = FALSE;
4853 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4855 stdio = PerlIO_exportFILE(f,0);
4859 name = fgetname(stdio, buf);
4860 if (exported) PerlIO_releaseFILE(f,stdio);
4865 PERL_UNUSED_ARG(buf);
4866 Perl_croak(aTHX_ "Don't know how to get file name");
4872 /*--------------------------------------------------------------------------------------*/
4874 * Functions which can be called on any kind of PerlIO implemented in
4878 #undef PerlIO_fdopen
4880 PerlIO_fdopen(int fd, const char *mode)
4883 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4888 PerlIO_open(const char *path, const char *mode)
4891 SV *name = sv_2mortal(newSVpv(path, 0));
4892 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4895 #undef Perlio_reopen
4897 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4900 SV *name = sv_2mortal(newSVpv(path,0));
4901 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4906 PerlIO_getc(PerlIO *f)
4910 if ( 1 == PerlIO_read(f, buf, 1) ) {
4911 return (unsigned char) buf[0];
4916 #undef PerlIO_ungetc
4918 PerlIO_ungetc(PerlIO *f, int ch)
4923 if (PerlIO_unread(f, &buf, 1) == 1)
4931 PerlIO_putc(PerlIO *f, int ch)
4935 return PerlIO_write(f, &buf, 1);
4940 PerlIO_puts(PerlIO *f, const char *s)
4943 return PerlIO_write(f, s, strlen(s));
4946 #undef PerlIO_rewind
4948 PerlIO_rewind(PerlIO *f)
4951 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4955 #undef PerlIO_vprintf
4957 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4960 SV * const sv = newSVpvs("");
4966 Perl_va_copy(ap, apc);
4967 sv_vcatpvf(sv, fmt, &apc);
4969 sv_vcatpvf(sv, fmt, &ap);
4971 s = SvPV_const(sv, len);
4972 wrote = PerlIO_write(f, s, len);
4977 #undef PerlIO_printf
4979 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4984 result = PerlIO_vprintf(f, fmt, ap);
4989 #undef PerlIO_stdoutf
4991 PerlIO_stdoutf(const char *fmt, ...)
4997 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5002 #undef PerlIO_tmpfile
5004 PerlIO_tmpfile(void)
5009 const int fd = win32_tmpfd();
5011 f = PerlIO_fdopen(fd, "w+b");
5013 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5014 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5016 * I have no idea how portable mkstemp() is ... NI-S
5018 const int fd = mkstemp(SvPVX(sv));
5020 f = PerlIO_fdopen(fd, "w+");
5022 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5023 PerlLIO_unlink(SvPVX_const(sv));
5026 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5027 FILE * const stdio = PerlSIO_tmpfile();
5030 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5031 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5033 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5039 # endif /* else HAS_MKSTEMP */
5040 #endif /* else WIN32 */
5047 #endif /* USE_SFIO */
5048 #endif /* PERLIO_IS_STDIO */
5050 /*======================================================================================*/
5052 * Now some functions in terms of above which may be needed even if we are
5053 * not in true PerlIO mode
5057 #undef PerlIO_setpos
5059 PerlIO_setpos(PerlIO *f, SV *pos)
5064 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5065 if (f && len == sizeof(Off_t))
5066 return PerlIO_seek(f, *posn, SEEK_SET);
5068 SETERRNO(EINVAL, SS_IVCHAN);
5072 #undef PerlIO_setpos
5074 PerlIO_setpos(PerlIO *f, SV *pos)
5079 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5080 if (f && len == sizeof(Fpos_t)) {
5081 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5082 return fsetpos64(f, fpos);
5084 return fsetpos(f, fpos);
5088 SETERRNO(EINVAL, SS_IVCHAN);
5094 #undef PerlIO_getpos
5096 PerlIO_getpos(PerlIO *f, SV *pos)
5099 Off_t posn = PerlIO_tell(f);
5100 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5101 return (posn == (Off_t) - 1) ? -1 : 0;
5104 #undef PerlIO_getpos
5106 PerlIO_getpos(PerlIO *f, SV *pos)
5111 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5112 code = fgetpos64(f, &fpos);
5114 code = fgetpos(f, &fpos);
5116 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5121 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5124 vprintf(char *pat, char *args)
5126 _doprnt(pat, args, stdout);
5127 return 0; /* wrong, but perl doesn't use the return
5132 vfprintf(FILE *fd, char *pat, char *args)
5134 _doprnt(pat, args, fd);
5135 return 0; /* wrong, but perl doesn't use the return
5141 #ifndef PerlIO_vsprintf
5143 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5146 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5148 if (strlen(s) >= (STRLEN) n) {
5150 (void) PerlIO_puts(Perl_error_log,
5151 "panic: sprintf overflow - memory corrupted!\n");
5159 #ifndef PerlIO_sprintf
5161 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5166 result = PerlIO_vsprintf(s, n, fmt, ap);
5174 * c-indentation-style: bsd
5176 * indent-tabs-mode: t
5179 * ex: set ts=8 sts=4 sw=4 noet: