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 perlsio_binmode(FILE *fp, int iotype, int mode)
127 * This used to be contents of do_binmode in doio.c
130 # if defined(atarist) || defined(__MINT__)
133 ((FILE *) fp)->_flag |= _IOBIN;
135 ((FILE *) fp)->_flag &= ~_IOBIN;
142 if (PerlLIO_setmode(fp, mode) != -1) {
144 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
146 # if defined(WIN32) && defined(__BORLANDC__)
148 * The translation mode of the stream is maintained independent
150 * the translation mode of the fd in the Borland RTL (heavy
151 * digging through their runtime sources reveal). User has to
153 * the mode explicitly for the stream (though they don't
155 * this anywhere). GSAR 97-5-24
161 fp->flags &= ~_F_BIN;
169 # if defined(USEMYBINMODE)
171 if (my_binmode(fp, iotype, mode) != FALSE)
177 PERL_UNUSED_ARG(iotype);
178 PERL_UNUSED_ARG(mode);
186 #define O_ACCMODE 3 /* Assume traditional implementation */
190 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
192 const int result = rawmode & O_ACCMODE;
197 ptype = IoTYPE_RDONLY;
200 ptype = IoTYPE_WRONLY;
208 *writing = (result != O_RDONLY);
210 if (result == O_RDONLY) {
214 else if (rawmode & O_APPEND) {
216 if (result != O_WRONLY)
221 if (result == O_WRONLY)
228 if (rawmode & O_BINARY)
234 #ifndef PERLIO_LAYERS
236 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
238 if (!names || !*names
239 || strEQ(names, ":crlf")
240 || strEQ(names, ":raw")
241 || strEQ(names, ":bytes")
245 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
253 PerlIO_destruct(pTHX)
258 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
261 PERL_UNUSED_ARG(iotype);
262 PERL_UNUSED_ARG(mode);
263 PERL_UNUSED_ARG(names);
266 return perlsio_binmode(fp, iotype, mode);
271 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
273 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
276 #ifdef PERL_IMPLICIT_SYS
277 return PerlSIO_fdupopen(f);
280 return win32_fdupopen(f);
283 const int fd = PerlLIO_dup(PerlIO_fileno(f));
287 const int omode = djgpp_get_stream_mode(f);
289 const int omode = fcntl(fd, F_GETFL);
291 PerlIO_intmode2str(omode,mode,NULL);
292 /* the r+ is a hack */
293 return PerlIO_fdopen(fd, mode);
298 SETERRNO(EBADF, SS_IVCHAN);
308 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
312 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
313 int imode, int perm, PerlIO *old, int narg, SV **args)
317 Perl_croak(aTHX_ "More than one argument to open");
319 if (*args == &PL_sv_undef)
320 return PerlIO_tmpfile();
322 const char *name = SvPV_nolen_const(*args);
323 if (*mode == IoTYPE_NUMERIC) {
324 fd = PerlLIO_open3(name, imode, perm);
326 return PerlIO_fdopen(fd, mode + 1);
329 return PerlIO_reopen(name, mode, old);
332 return PerlIO_open(name, mode);
337 return PerlIO_fdopen(fd, (char *) mode);
342 XS(XS_PerlIO__Layer__find)
346 Perl_croak(aTHX_ "Usage class->find(name[,load])");
348 const char * const name = SvPV_nolen_const(ST(1));
349 ST(0) = (strEQ(name, "crlf")
350 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
357 Perl_boot_core_PerlIO(pTHX)
359 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
365 #ifdef PERLIO_IS_STDIO
372 * Does nothing (yet) except force this file to be included in perl
373 * binary. That allows this file to force inclusion of other functions
374 * that may be required by loadable extensions e.g. for
375 * FileHandle::tmpfile
379 #undef PerlIO_tmpfile
386 #else /* PERLIO_IS_STDIO */
394 * This section is just to make sure these functions get pulled in from
398 #undef PerlIO_tmpfile
410 * Force this file to be included in perl binary. Which allows this
411 * file to force inclusion of other functions that may be required by
412 * loadable extensions e.g. for FileHandle::tmpfile
416 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
417 * results in a lot of lseek()s to regular files and lot of small
420 sfset(sfstdout, SF_SHARE, 0);
423 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
425 PerlIO_importFILE(FILE *stdio, const char *mode)
427 const int fd = fileno(stdio);
428 if (!mode || !*mode) {
431 return PerlIO_fdopen(fd, mode);
435 PerlIO_findFILE(PerlIO *pio)
437 const int fd = PerlIO_fileno(pio);
438 FILE * const f = fdopen(fd, "r+");
440 if (!f && errno == EINVAL)
442 if (!f && errno == EINVAL)
449 /*======================================================================================*/
451 * Implement all the PerlIO interface ourselves.
457 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
464 #include <sys/mman.h>
468 PerlIO_debug(const char *fmt, ...)
473 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
474 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
476 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
478 PL_perlio_debug_fd = -1;
480 if (PL_perlio_debug_fd > 0) {
483 const char * const s = CopFILE(PL_curcop);
484 /* Use fixed buffer as sv_catpvf etc. needs SVs */
486 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
487 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
488 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
490 const char *s = CopFILE(PL_curcop);
492 SV * const sv = newSVpvs("");
493 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
494 (IV) CopLINE(PL_curcop));
495 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
497 s = SvPV_const(sv, len);
498 PerlLIO_write(PL_perlio_debug_fd, s, len);
505 /*--------------------------------------------------------------------------------------*/
508 * Inner level routines
512 * Table of pointers to the PerlIO structs (malloc'ed)
514 #define PERLIO_TABLE_SIZE 64
517 PerlIO_allocate(pTHX)
521 * Find a free slot in the table, allocating new table as necessary
526 while ((f = *last)) {
528 last = (PerlIO **) (f);
529 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
535 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
543 #undef PerlIO_fdupopen
545 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
547 if (PerlIOValid(f)) {
548 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
549 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
551 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
553 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
557 SETERRNO(EBADF, SS_IVCHAN);
563 PerlIO_cleantable(pTHX_ PerlIO **tablep)
565 PerlIO * const table = *tablep;
568 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
569 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
570 PerlIO * const f = table + i;
582 PerlIO_list_alloc(pTHX)
586 Newxz(list, 1, PerlIO_list_t);
592 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
595 if (--list->refcnt == 0) {
598 for (i = 0; i < list->cur; i++) {
599 if (list->array[i].arg)
600 SvREFCNT_dec(list->array[i].arg);
602 Safefree(list->array);
610 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
616 if (list->cur >= list->len) {
619 Renew(list->array, list->len, PerlIO_pair_t);
621 Newx(list->array, list->len, PerlIO_pair_t);
623 p = &(list->array[list->cur++]);
625 if ((p->arg = arg)) {
626 SvREFCNT_inc_simple_void_NN(arg);
631 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
633 PerlIO_list_t *list = NULL;
636 list = PerlIO_list_alloc(aTHX);
637 for (i=0; i < proto->cur; i++) {
639 if (proto->array[i].arg)
640 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
641 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
648 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
651 PerlIO **table = &proto->Iperlio;
654 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
655 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
656 PerlIO_allocate(aTHX); /* root slot is never used */
657 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
658 while ((f = *table)) {
660 table = (PerlIO **) (f++);
661 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
663 (void) fp_dup(f, 0, param);
670 PERL_UNUSED_ARG(proto);
671 PERL_UNUSED_ARG(param);
676 PerlIO_destruct(pTHX)
679 PerlIO **table = &PL_perlio;
682 PerlIO_debug("Destruct %p\n",(void*)aTHX);
684 while ((f = *table)) {
686 table = (PerlIO **) (f++);
687 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
691 if (l->tab->kind & PERLIO_K_DESTRUCT) {
692 PerlIO_debug("Destruct popping %s\n", l->tab->name);
706 PerlIO_pop(pTHX_ PerlIO *f)
708 const PerlIOl *l = *f;
710 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
711 if (l->tab->Popped) {
713 * If popped returns non-zero do not free its layer structure
714 * it has either done so itself, or it is shared and still in
717 if ((*l->tab->Popped) (aTHX_ f) != 0)
725 /* Return as an array the stack of layers on a filehandle. Note that
726 * the stack is returned top-first in the array, and there are three
727 * times as many array elements as there are layers in the stack: the
728 * first element of a layer triplet is the name, the second one is the
729 * arguments, and the third one is the flags. */
732 PerlIO_get_layers(pTHX_ PerlIO *f)
735 AV * const av = newAV();
737 if (PerlIOValid(f)) {
738 PerlIOl *l = PerlIOBase(f);
741 SV * const name = l->tab && l->tab->name ?
742 newSVpv(l->tab->name, 0) : &PL_sv_undef;
743 SV * const arg = l->tab && l->tab->Getarg ?
744 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
747 av_push(av, newSViv((IV)l->flags));
755 /*--------------------------------------------------------------------------------------*/
757 * XS Interface for perl code
761 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
765 if ((SSize_t) len <= 0)
767 for (i = 0; i < PL_known_layers->cur; i++) {
768 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
769 if (memEQ(f->name, name, len) && f->name[len] == 0) {
770 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
774 if (load && PL_subname && PL_def_layerlist
775 && PL_def_layerlist->cur >= 2) {
776 if (PL_in_load_module) {
777 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
780 SV * const pkgsv = newSVpvs("PerlIO");
781 SV * const layer = newSVpvn(name, len);
782 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
784 SAVEINT(PL_in_load_module);
786 SAVEGENERICSV(PL_warnhook);
787 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
791 * The two SVs are magically freed by load_module
793 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
796 return PerlIO_find_layer(aTHX_ name, len, 0);
799 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
803 #ifdef USE_ATTRIBUTES_FOR_PERLIO
806 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
809 IO * const io = GvIOn((GV *) SvRV(sv));
810 PerlIO * const ifp = IoIFP(io);
811 PerlIO * const ofp = IoOFP(io);
812 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
818 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
821 IO * const io = GvIOn((GV *) SvRV(sv));
822 PerlIO * const ifp = IoIFP(io);
823 PerlIO * const ofp = IoOFP(io);
824 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
830 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
832 Perl_warn(aTHX_ "clear %" SVf, sv);
837 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
839 Perl_warn(aTHX_ "free %" SVf, sv);
843 MGVTBL perlio_vtab = {
851 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
854 SV * const sv = SvRV(ST(1));
855 AV * const av = newAV();
859 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
861 mg = mg_find(sv, PERL_MAGIC_ext);
862 mg->mg_virtual = &perlio_vtab;
864 Perl_warn(aTHX_ "attrib %" SVf, sv);
865 for (i = 2; i < items; i++) {
867 const char * const name = SvPV_const(ST(i), len);
868 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
870 av_push(av, SvREFCNT_inc_simple_NN(layer));
881 #endif /* USE_ATTIBUTES_FOR_PERLIO */
884 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
886 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
887 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
891 XS(XS_PerlIO__Layer__NoWarnings)
893 /* This is used as a %SIG{__WARN__} handler to supress warnings
894 during loading of layers.
899 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
903 XS(XS_PerlIO__Layer__find)
908 Perl_croak(aTHX_ "Usage class->find(name[,load])");
911 const char * const name = SvPV_const(ST(1), len);
912 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
913 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
915 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
922 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
925 if (!PL_known_layers)
926 PL_known_layers = PerlIO_list_alloc(aTHX);
927 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
928 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
932 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
936 const char *s = names;
938 while (isSPACE(*s) || *s == ':')
943 const char *as = NULL;
945 if (!isIDFIRST(*s)) {
947 * Message is consistent with how attribute lists are
948 * passed. Even though this means "foo : : bar" is
949 * seen as an invalid separator character.
951 const char q = ((*s == '\'') ? '"' : '\'');
952 if (ckWARN(WARN_LAYER))
953 Perl_warner(aTHX_ packWARN(WARN_LAYER),
954 "Invalid separator character %c%c%c in PerlIO layer specification %s",
956 SETERRNO(EINVAL, LIB_INVARG);
961 } while (isALNUM(*e));
977 * It's a nul terminated string, not allowed
978 * to \ the terminating null. Anything other
979 * character is passed over.
989 if (ckWARN(WARN_LAYER))
990 Perl_warner(aTHX_ packWARN(WARN_LAYER),
991 "Argument list not closed for PerlIO layer \"%.*s\"",
1003 PerlIO_funcs * const layer =
1004 PerlIO_find_layer(aTHX_ s, llen, 1);
1006 PerlIO_list_push(aTHX_ av, layer,
1012 if (ckWARN(WARN_LAYER))
1013 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1026 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1029 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1030 #ifdef PERLIO_USING_CRLF
1033 if (PerlIO_stdio.Set_ptrcnt)
1034 tab = &PerlIO_stdio;
1036 PerlIO_debug("Pushing %s\n", tab->name);
1037 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1042 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1044 return av->array[n].arg;
1048 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1050 if (n >= 0 && n < av->cur) {
1051 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1052 av->array[n].funcs->name);
1053 return av->array[n].funcs;
1056 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1061 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1063 PERL_UNUSED_ARG(mode);
1064 PERL_UNUSED_ARG(arg);
1065 PERL_UNUSED_ARG(tab);
1066 if (PerlIOValid(f)) {
1068 PerlIO_pop(aTHX_ f);
1074 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1075 sizeof(PerlIO_funcs),
1078 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1098 NULL, /* get_base */
1099 NULL, /* get_bufsiz */
1102 NULL, /* set_ptrcnt */
1106 PerlIO_default_layers(pTHX)
1109 if (!PL_def_layerlist) {
1110 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1111 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1112 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1113 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1117 osLayer = &PerlIO_win32;
1120 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1121 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1122 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1125 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1127 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1128 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1129 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1130 PerlIO_list_push(aTHX_ PL_def_layerlist,
1131 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1134 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1137 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1140 if (PL_def_layerlist->cur < 2) {
1141 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1143 return PL_def_layerlist;
1147 Perl_boot_core_PerlIO(pTHX)
1149 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1150 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1153 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1154 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1158 PerlIO_default_layer(pTHX_ I32 n)
1161 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1164 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1167 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1168 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1171 PerlIO_stdstreams(pTHX)
1175 PerlIO_allocate(aTHX);
1176 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1177 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1178 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1183 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1185 if (tab->fsize != sizeof(PerlIO_funcs)) {
1187 Perl_croak(aTHX_ "Layer does not match this perl");
1191 if (tab->size < sizeof(PerlIOl)) {
1194 /* Real layer with a data area */
1197 Newxz(temp, tab->size, char);
1201 l->tab = (PerlIO_funcs*) tab;
1203 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1204 (void*)f, tab->name,
1205 (mode) ? mode : "(Null)", (void*)arg);
1206 if (*l->tab->Pushed &&
1208 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1209 PerlIO_pop(aTHX_ f);
1218 /* Pseudo-layer where push does its own stack adjust */
1219 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1220 (mode) ? mode : "(Null)", (void*)arg);
1222 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1230 PerlIOBase_binmode(pTHX_ PerlIO *f)
1232 if (PerlIOValid(f)) {
1233 /* Is layer suitable for raw stream ? */
1234 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1235 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1236 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1239 /* Not suitable - pop it */
1240 PerlIO_pop(aTHX_ f);
1248 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1250 PERL_UNUSED_ARG(mode);
1251 PERL_UNUSED_ARG(arg);
1252 PERL_UNUSED_ARG(tab);
1254 if (PerlIOValid(f)) {
1259 * Strip all layers that are not suitable for a raw stream
1262 while (t && (l = *t)) {
1263 if (l->tab->Binmode) {
1264 /* Has a handler - normal case */
1265 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1267 /* Layer still there - move down a layer */
1276 /* No handler - pop it */
1277 PerlIO_pop(aTHX_ t);
1280 if (PerlIOValid(f)) {
1281 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1289 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1290 PerlIO_list_t *layers, IV n, IV max)
1294 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1296 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1307 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1311 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1312 code = PerlIO_parse_layers(aTHX_ layers, names);
1314 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1316 PerlIO_list_free(aTHX_ layers);
1322 /*--------------------------------------------------------------------------------------*/
1324 * Given the abstraction above the public API functions
1328 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1330 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1331 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1332 iotype, mode, (names) ? names : "(Null)");
1335 /* Do not flush etc. if (e.g.) switching encodings.
1336 if a pushed layer knows it needs to flush lower layers
1337 (for example :unix which is never going to call them)
1338 it can do the flush when it is pushed.
1340 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1343 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1344 #ifdef PERLIO_USING_CRLF
1345 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1346 O_BINARY so we can look for it in mode.
1348 if (!(mode & O_BINARY)) {
1350 /* FIXME?: Looking down the layer stack seems wrong,
1351 but is a way of reaching past (say) an encoding layer
1352 to flip CRLF-ness of the layer(s) below
1355 /* Perhaps we should turn on bottom-most aware layer
1356 e.g. Ilya's idea that UNIX TTY could serve
1358 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1359 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1360 /* Not in text mode - flush any pending stuff and flip it */
1362 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1364 /* Only need to turn it on in one layer so we are done */
1369 /* Not finding a CRLF aware layer presumably means we are binary
1370 which is not what was requested - so we failed
1371 We _could_ push :crlf layer but so could caller
1376 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1377 So code that used to be here is now in PerlIORaw_pushed().
1379 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1384 PerlIO__close(pTHX_ PerlIO *f)
1386 if (PerlIOValid(f)) {
1387 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1388 if (tab && tab->Close)
1389 return (*tab->Close)(aTHX_ f);
1391 return PerlIOBase_close(aTHX_ f);
1394 SETERRNO(EBADF, SS_IVCHAN);
1400 Perl_PerlIO_close(pTHX_ PerlIO *f)
1402 const int code = PerlIO__close(aTHX_ f);
1403 while (PerlIOValid(f)) {
1404 PerlIO_pop(aTHX_ f);
1410 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1413 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1417 static PerlIO_funcs *
1418 PerlIO_layer_from_ref(pTHX_ SV *sv)
1422 * For any scalar type load the handler which is bundled with perl
1424 if (SvTYPE(sv) < SVt_PVAV)
1425 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1428 * For other types allow if layer is known but don't try and load it
1430 switch (SvTYPE(sv)) {
1432 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1434 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1436 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1438 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1445 PerlIO_resolve_layers(pTHX_ const char *layers,
1446 const char *mode, int narg, SV **args)
1449 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1452 PerlIO_stdstreams(aTHX);
1454 SV * const arg = *args;
1456 * If it is a reference but not an object see if we have a handler
1459 if (SvROK(arg) && !sv_isobject(arg)) {
1460 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1462 def = PerlIO_list_alloc(aTHX);
1463 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1467 * Don't fail if handler cannot be found :via(...) etc. may do
1468 * something sensible else we will just stringfy and open
1473 if (!layers || !*layers)
1474 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1475 if (layers && *layers) {
1479 av = PerlIO_list_alloc(aTHX);
1480 for (i = 0; i < def->cur; i++) {
1481 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1488 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1492 PerlIO_list_free(aTHX_ av);
1504 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1505 int imode, int perm, PerlIO *f, int narg, SV **args)
1508 if (!f && narg == 1 && *args == &PL_sv_undef) {
1509 if ((f = PerlIO_tmpfile())) {
1510 if (!layers || !*layers)
1511 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1512 if (layers && *layers)
1513 PerlIO_apply_layers(aTHX_ f, mode, layers);
1517 PerlIO_list_t *layera;
1519 PerlIO_funcs *tab = NULL;
1520 if (PerlIOValid(f)) {
1522 * This is "reopen" - it is not tested as perl does not use it
1526 layera = PerlIO_list_alloc(aTHX);
1528 SV * const arg = (l->tab->Getarg)
1529 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1531 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1532 l = *PerlIONext(&l);
1536 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1542 * Start at "top" of layer stack
1544 n = layera->cur - 1;
1546 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1555 * Found that layer 'n' can do opens - call it
1557 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1558 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1560 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1561 tab->name, layers ? layers : "(Null)", mode, fd,
1562 imode, perm, (void*)f, narg, (void*)args);
1564 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1567 SETERRNO(EINVAL, LIB_INVARG);
1571 if (n + 1 < layera->cur) {
1573 * More layers above the one that we used to open -
1576 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1577 /* If pushing layers fails close the file */
1584 PerlIO_list_free(aTHX_ layera);
1591 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1593 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1597 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1599 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1603 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1605 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1609 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1611 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1615 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1617 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1621 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1626 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1628 if (tab && tab->Flush)
1629 return (*tab->Flush) (aTHX_ f);
1631 return 0; /* If no Flush defined, silently succeed. */
1634 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1635 SETERRNO(EBADF, SS_IVCHAN);
1641 * Is it good API design to do flush-all on NULL, a potentially
1642 * errorneous input? Maybe some magical value (PerlIO*
1643 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1644 * things on fflush(NULL), but should we be bound by their design
1647 PerlIO **table = &PL_perlio;
1649 while ((f = *table)) {
1651 table = (PerlIO **) (f++);
1652 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1653 if (*f && PerlIO_flush(f) != 0)
1663 PerlIOBase_flush_linebuf(pTHX)
1666 PerlIO **table = &PL_perlio;
1668 while ((f = *table)) {
1670 table = (PerlIO **) (f++);
1671 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1674 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1675 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1683 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1685 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1689 PerlIO_isutf8(PerlIO *f)
1692 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1694 SETERRNO(EBADF, SS_IVCHAN);
1700 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1706 Perl_PerlIO_error(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1712 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1714 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1718 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1720 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1724 PerlIO_has_base(PerlIO *f)
1726 if (PerlIOValid(f)) {
1727 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1730 return (tab->Get_base != NULL);
1731 SETERRNO(EINVAL, LIB_INVARG);
1734 SETERRNO(EBADF, SS_IVCHAN);
1740 PerlIO_fast_gets(PerlIO *f)
1742 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1743 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1746 return (tab->Set_ptrcnt != NULL);
1747 SETERRNO(EINVAL, LIB_INVARG);
1750 SETERRNO(EBADF, SS_IVCHAN);
1756 PerlIO_has_cntptr(PerlIO *f)
1758 if (PerlIOValid(f)) {
1759 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1762 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1763 SETERRNO(EINVAL, LIB_INVARG);
1766 SETERRNO(EBADF, SS_IVCHAN);
1772 PerlIO_canset_cnt(PerlIO *f)
1774 if (PerlIOValid(f)) {
1775 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1778 return (tab->Set_ptrcnt != NULL);
1779 SETERRNO(EINVAL, LIB_INVARG);
1782 SETERRNO(EBADF, SS_IVCHAN);
1788 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1790 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1794 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1796 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1800 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1802 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1806 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1808 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1812 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1814 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1818 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1820 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1824 /*--------------------------------------------------------------------------------------*/
1826 * utf8 and raw dummy layers
1830 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1832 PERL_UNUSED_CONTEXT;
1833 PERL_UNUSED_ARG(mode);
1834 PERL_UNUSED_ARG(arg);
1835 if (PerlIOValid(f)) {
1836 if (tab->kind & PERLIO_K_UTF8)
1837 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1839 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1845 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1846 sizeof(PerlIO_funcs),
1849 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1869 NULL, /* get_base */
1870 NULL, /* get_bufsiz */
1873 NULL, /* set_ptrcnt */
1876 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1877 sizeof(PerlIO_funcs),
1900 NULL, /* get_base */
1901 NULL, /* get_bufsiz */
1904 NULL, /* set_ptrcnt */
1908 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1909 IV n, const char *mode, int fd, int imode, int perm,
1910 PerlIO *old, int narg, SV **args)
1912 PerlIO_funcs * const tab = PerlIO_default_btm();
1913 PERL_UNUSED_ARG(self);
1914 if (tab && tab->Open)
1915 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1917 SETERRNO(EINVAL, LIB_INVARG);
1921 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1922 sizeof(PerlIO_funcs),
1945 NULL, /* get_base */
1946 NULL, /* get_bufsiz */
1949 NULL, /* set_ptrcnt */
1951 /*--------------------------------------------------------------------------------------*/
1952 /*--------------------------------------------------------------------------------------*/
1954 * "Methods" of the "base class"
1958 PerlIOBase_fileno(pTHX_ PerlIO *f)
1960 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1964 PerlIO_modestr(PerlIO * f, char *buf)
1967 if (PerlIOValid(f)) {
1968 const IV flags = PerlIOBase(f)->flags;
1969 if (flags & PERLIO_F_APPEND) {
1971 if (flags & PERLIO_F_CANREAD) {
1975 else if (flags & PERLIO_F_CANREAD) {
1977 if (flags & PERLIO_F_CANWRITE)
1980 else if (flags & PERLIO_F_CANWRITE) {
1982 if (flags & PERLIO_F_CANREAD) {
1986 #ifdef PERLIO_USING_CRLF
1987 if (!(flags & PERLIO_F_CRLF))
1997 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1999 PerlIOl * const l = PerlIOBase(f);
2000 PERL_UNUSED_CONTEXT;
2001 PERL_UNUSED_ARG(arg);
2003 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2004 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2005 if (tab->Set_ptrcnt != NULL)
2006 l->flags |= PERLIO_F_FASTGETS;
2008 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2012 l->flags |= PERLIO_F_CANREAD;
2015 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2018 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2021 SETERRNO(EINVAL, LIB_INVARG);
2027 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2030 l->flags &= ~PERLIO_F_CRLF;
2033 l->flags |= PERLIO_F_CRLF;
2036 SETERRNO(EINVAL, LIB_INVARG);
2043 l->flags |= l->next->flags &
2044 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2049 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2050 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2051 l->flags, PerlIO_modestr(f, temp));
2057 PerlIOBase_popped(pTHX_ PerlIO *f)
2059 PERL_UNUSED_CONTEXT;
2065 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2068 * Save the position as current head considers it
2070 const Off_t old = PerlIO_tell(f);
2071 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2072 PerlIOSelf(f, PerlIOBuf)->posn = old;
2073 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2077 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2079 STDCHAR *buf = (STDCHAR *) vbuf;
2081 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2082 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2083 SETERRNO(EBADF, SS_IVCHAN);
2089 SSize_t avail = PerlIO_get_cnt(f);
2092 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2094 STDCHAR *ptr = PerlIO_get_ptr(f);
2095 Copy(ptr, buf, take, STDCHAR);
2096 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2099 if (avail == 0) /* set_ptrcnt could have reset avail */
2102 if (count > 0 && avail <= 0) {
2103 if (PerlIO_fill(f) != 0)
2108 return (buf - (STDCHAR *) vbuf);
2114 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2116 PERL_UNUSED_CONTEXT;
2122 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2124 PERL_UNUSED_CONTEXT;
2130 PerlIOBase_close(pTHX_ PerlIO *f)
2133 if (PerlIOValid(f)) {
2134 PerlIO *n = PerlIONext(f);
2135 code = PerlIO_flush(f);
2136 PerlIOBase(f)->flags &=
2137 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2138 while (PerlIOValid(n)) {
2139 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2140 if (tab && tab->Close) {
2141 if ((*tab->Close)(aTHX_ n) != 0)
2146 PerlIOBase(n)->flags &=
2147 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2153 SETERRNO(EBADF, SS_IVCHAN);
2159 PerlIOBase_eof(pTHX_ PerlIO *f)
2161 PERL_UNUSED_CONTEXT;
2162 if (PerlIOValid(f)) {
2163 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2169 PerlIOBase_error(pTHX_ PerlIO *f)
2171 PERL_UNUSED_CONTEXT;
2172 if (PerlIOValid(f)) {
2173 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2179 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2181 if (PerlIOValid(f)) {
2182 PerlIO * const n = PerlIONext(f);
2183 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2190 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2192 PERL_UNUSED_CONTEXT;
2193 if (PerlIOValid(f)) {
2194 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2199 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2205 return sv_dup(arg, param);
2208 return newSVsv(arg);
2211 PERL_UNUSED_ARG(param);
2212 return newSVsv(arg);
2217 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2219 PerlIO * const nexto = PerlIONext(o);
2220 if (PerlIOValid(nexto)) {
2221 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2222 if (tab && tab->Dup)
2223 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2225 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2228 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2231 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2232 self->name, (void*)f, (void*)o, (void*)param);
2234 arg = (*self->Getarg)(aTHX_ o, param, flags);
2238 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2247 perl_mutex PerlIO_mutex;
2250 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2252 /* Must be called with PerlIO_mutex locked. */
2254 S_more_refcounted_fds(pTHX_ const int new_fd) {
2256 const int old_max = PL_perlio_fd_refcnt_size;
2257 const int new_max = 16 + (new_fd & ~15);
2260 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2261 old_max, new_fd, new_max);
2263 if (new_fd < old_max) {
2267 assert (new_max > new_fd);
2270 (int*) PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2274 MUTEX_UNLOCK(&PerlIO_mutex);
2276 /* Can't use PerlIO to write as it allocates memory */
2277 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2278 PL_no_mem, strlen(PL_no_mem));
2282 PL_perlio_fd_refcnt_size = new_max;
2283 PL_perlio_fd_refcnt = new_array;
2285 PerlIO_debug("Zeroing %p, %d\n",
2286 (void*)(new_array + old_max),
2289 Zero(new_array + old_max, new_max - old_max, int);
2296 /* Place holder for stdstreams call ??? */
2298 MUTEX_INIT(&PerlIO_mutex);
2300 PERL_UNUSED_CONTEXT;
2305 PerlIOUnix_refcnt_inc(int fd)
2312 MUTEX_LOCK(&PerlIO_mutex);
2314 if (fd >= PL_perlio_fd_refcnt_size)
2315 S_more_refcounted_fds(aTHX_ fd);
2317 PL_perlio_fd_refcnt[fd]++;
2318 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2321 MUTEX_UNLOCK(&PerlIO_mutex);
2327 PerlIOUnix_refcnt_dec(int fd)
2334 MUTEX_LOCK(&PerlIO_mutex);
2336 /* XXX should this be a panic? */
2337 if (fd >= PL_perlio_fd_refcnt_size)
2338 S_more_refcounted_fds(aTHX_ fd);
2340 /* XXX should this be a panic if it drops below 0? */
2341 cnt = --PL_perlio_fd_refcnt[fd];
2342 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2344 MUTEX_UNLOCK(&PerlIO_mutex);
2351 PerlIO_cleanup(pTHX)
2356 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2358 PerlIO_debug("Cleanup layers\n");
2360 /* Raise STDIN..STDERR refcount so we don't close them */
2361 for (i=0; i < 3; i++)
2362 PerlIOUnix_refcnt_inc(i);
2363 PerlIO_cleantable(aTHX_ &PL_perlio);
2364 /* Restore STDIN..STDERR refcount */
2365 for (i=0; i < 3; i++)
2366 PerlIOUnix_refcnt_dec(i);
2368 if (PL_known_layers) {
2369 PerlIO_list_free(aTHX_ PL_known_layers);
2370 PL_known_layers = NULL;
2372 if (PL_def_layerlist) {
2373 PerlIO_list_free(aTHX_ PL_def_layerlist);
2374 PL_def_layerlist = NULL;
2380 /*--------------------------------------------------------------------------------------*/
2382 * Bottom-most level for UNIX-like case
2386 struct _PerlIO base; /* The generic part */
2387 int fd; /* UNIX like file descriptor */
2388 int oflags; /* open/fcntl flags */
2392 PerlIOUnix_oflags(const char *mode)
2395 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2400 if (*++mode == '+') {
2407 oflags = O_CREAT | O_TRUNC;
2408 if (*++mode == '+') {
2417 oflags = O_CREAT | O_APPEND;
2418 if (*++mode == '+') {
2431 else if (*mode == 't') {
2433 oflags &= ~O_BINARY;
2437 * Always open in binary mode
2440 if (*mode || oflags == -1) {
2441 SETERRNO(EINVAL, LIB_INVARG);
2448 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2450 PERL_UNUSED_CONTEXT;
2451 return PerlIOSelf(f, PerlIOUnix)->fd;
2455 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2457 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2460 if (PerlLIO_fstat(fd, &st) == 0) {
2461 if (!S_ISREG(st.st_mode)) {
2462 PerlIO_debug("%d is not regular file\n",fd);
2463 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2466 PerlIO_debug("%d _is_ a regular file\n",fd);
2472 PerlIOUnix_refcnt_inc(fd);
2473 PERL_UNUSED_CONTEXT;
2477 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2479 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2480 if (*PerlIONext(f)) {
2481 /* We never call down so do any pending stuff now */
2482 PerlIO_flush(PerlIONext(f));
2484 * XXX could (or should) we retrieve the oflags from the open file
2485 * handle rather than believing the "mode" we are passed in? XXX
2486 * Should the value on NULL mode be 0 or -1?
2488 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2489 mode ? PerlIOUnix_oflags(mode) : -1);
2491 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2497 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2499 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2501 PERL_UNUSED_CONTEXT;
2502 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2504 SETERRNO(ESPIPE, LIB_INVARG);
2506 SETERRNO(EINVAL, LIB_INVARG);
2510 new_loc = PerlLIO_lseek(fd, offset, whence);
2511 if (new_loc == (Off_t) - 1)
2513 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2518 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2519 IV n, const char *mode, int fd, int imode,
2520 int perm, PerlIO *f, int narg, SV **args)
2522 if (PerlIOValid(f)) {
2523 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2524 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2527 if (*mode == IoTYPE_NUMERIC)
2530 imode = PerlIOUnix_oflags(mode);
2534 const char *path = SvPV_nolen_const(*args);
2535 fd = PerlLIO_open3(path, imode, perm);
2539 if (*mode == IoTYPE_IMPLICIT)
2542 f = PerlIO_allocate(aTHX);
2544 if (!PerlIOValid(f)) {
2545 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2549 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2550 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2551 if (*mode == IoTYPE_APPEND)
2552 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2559 * FIXME: pop layers ???
2567 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2569 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2571 if (flags & PERLIO_DUP_FD) {
2572 fd = PerlLIO_dup(fd);
2575 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2577 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2578 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2587 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2590 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2591 #ifdef PERLIO_STD_SPECIAL
2593 return PERLIO_STD_IN(fd, vbuf, count);
2595 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2596 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2600 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2601 if (len >= 0 || errno != EINTR) {
2603 if (errno != EAGAIN) {
2604 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2607 else if (len == 0 && count != 0) {
2608 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2619 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2622 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2623 #ifdef PERLIO_STD_SPECIAL
2624 if (fd == 1 || fd == 2)
2625 return PERLIO_STD_OUT(fd, vbuf, count);
2628 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2629 if (len >= 0 || errno != EINTR) {
2631 if (errno != EAGAIN) {
2632 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2643 PerlIOUnix_tell(pTHX_ PerlIO *f)
2645 PERL_UNUSED_CONTEXT;
2647 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2652 PerlIOUnix_close(pTHX_ PerlIO *f)
2655 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2657 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2658 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2659 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2664 SETERRNO(EBADF,SS_IVCHAN);
2667 while (PerlLIO_close(fd) != 0) {
2668 if (errno != EINTR) {
2675 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2680 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2681 sizeof(PerlIO_funcs),
2688 PerlIOBase_binmode, /* binmode */
2698 PerlIOBase_noop_ok, /* flush */
2699 PerlIOBase_noop_fail, /* fill */
2702 PerlIOBase_clearerr,
2703 PerlIOBase_setlinebuf,
2704 NULL, /* get_base */
2705 NULL, /* get_bufsiz */
2708 NULL, /* set_ptrcnt */
2711 /*--------------------------------------------------------------------------------------*/
2716 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2717 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2718 broken by the last second glibc 2.3 fix
2720 #define STDIO_BUFFER_WRITABLE
2725 struct _PerlIO base;
2726 FILE *stdio; /* The stream */
2730 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2732 PERL_UNUSED_CONTEXT;
2734 if (PerlIOValid(f)) {
2735 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2737 return PerlSIO_fileno(s);
2744 PerlIOStdio_mode(const char *mode, char *tmode)
2746 char * const ret = tmode;
2752 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2760 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2763 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2764 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2765 if (toptab == tab) {
2766 /* Top is already stdio - pop self (duplicate) and use original */
2767 PerlIO_pop(aTHX_ f);
2770 const int fd = PerlIO_fileno(n);
2773 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2774 mode = PerlIOStdio_mode(mode, tmode)))) {
2775 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2776 /* We never call down so do any pending stuff now */
2777 PerlIO_flush(PerlIONext(f));
2784 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2789 PerlIO_importFILE(FILE *stdio, const char *mode)
2795 if (!mode || !*mode) {
2796 /* We need to probe to see how we can open the stream
2797 so start with read/write and then try write and read
2798 we dup() so that we can fclose without loosing the fd.
2800 Note that the errno value set by a failing fdopen
2801 varies between stdio implementations.
2803 const int fd = PerlLIO_dup(fileno(stdio));
2804 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2806 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2809 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2812 /* Don't seem to be able to open */
2818 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2819 s = PerlIOSelf(f, PerlIOStdio);
2827 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2828 IV n, const char *mode, int fd, int imode,
2829 int perm, PerlIO *f, int narg, SV **args)
2832 if (PerlIOValid(f)) {
2833 const char * const path = SvPV_nolen_const(*args);
2834 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2836 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2837 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2842 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2847 const char * const path = SvPV_nolen_const(*args);
2848 if (*mode == IoTYPE_NUMERIC) {
2850 fd = PerlLIO_open3(path, imode, perm);
2854 bool appended = FALSE;
2856 /* Cygwin wants its 'b' early. */
2858 mode = PerlIOStdio_mode(mode, tmode);
2860 stdio = PerlSIO_fopen(path, mode);
2863 f = PerlIO_allocate(aTHX);
2866 mode = PerlIOStdio_mode(mode, tmode);
2867 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2869 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2870 PerlIOUnix_refcnt_inc(fileno(stdio));
2872 PerlSIO_fclose(stdio);
2884 if (*mode == IoTYPE_IMPLICIT) {
2891 stdio = PerlSIO_stdin;
2894 stdio = PerlSIO_stdout;
2897 stdio = PerlSIO_stderr;
2902 stdio = PerlSIO_fdopen(fd, mode =
2903 PerlIOStdio_mode(mode, tmode));
2907 f = PerlIO_allocate(aTHX);
2909 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2910 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2911 PerlIOUnix_refcnt_inc(fileno(stdio));
2921 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2923 /* This assumes no layers underneath - which is what
2924 happens, but is not how I remember it. NI-S 2001/10/16
2926 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2927 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2928 const int fd = fileno(stdio);
2930 if (flags & PERLIO_DUP_FD) {
2931 const int dfd = PerlLIO_dup(fileno(stdio));
2933 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2938 /* FIXME: To avoid messy error recovery if dup fails
2939 re-use the existing stdio as though flag was not set
2943 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2945 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2946 PerlIOUnix_refcnt_inc(fileno(stdio));
2952 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2954 PERL_UNUSED_CONTEXT;
2956 /* XXX this could use PerlIO_canset_fileno() and
2957 * PerlIO_set_fileno() support from Configure
2959 # if defined(__UCLIBC__)
2960 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2963 # elif defined(__GLIBC__)
2964 /* There may be a better way for GLIBC:
2965 - libio.h defines a flag to not close() on cleanup
2969 # elif defined(__sun__)
2971 # elif defined(__hpux)
2975 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2976 your platform does not have special entry try this one.
2977 [For OSF only have confirmation for Tru64 (alpha)
2978 but assume other OSFs will be similar.]
2980 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2983 # elif defined(__FreeBSD__)
2984 /* There may be a better way on FreeBSD:
2985 - we could insert a dummy func in the _close function entry
2986 f->_close = (int (*)(void *)) dummy_close;
2990 # elif defined(__OpenBSD__)
2991 /* There may be a better way on OpenBSD:
2992 - we could insert a dummy func in the _close function entry
2993 f->_close = (int (*)(void *)) dummy_close;
2997 # elif defined(__EMX__)
2998 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3001 # elif defined(__CYGWIN__)
3002 /* There may be a better way on CYGWIN:
3003 - we could insert a dummy func in the _close function entry
3004 f->_close = (int (*)(void *)) dummy_close;
3008 # elif defined(WIN32)
3009 # if defined(__BORLANDC__)
3010 f->fd = PerlLIO_dup(fileno(f));
3011 # elif defined(UNDER_CE)
3012 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3021 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3022 (which isn't thread safe) instead
3024 # error "Don't know how to set FILE.fileno on your platform"
3032 PerlIOStdio_close(pTHX_ PerlIO *f)
3034 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3040 const int fd = fileno(stdio);
3045 #ifdef SOCKS5_VERSION_NAME
3046 /* Socks lib overrides close() but stdio isn't linked to
3047 that library (though we are) - so we must call close()
3048 on sockets on stdio's behalf.
3051 Sock_size_t optlen = sizeof(int);
3052 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3055 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3058 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3059 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3061 if (stdio == stdout || stdio == stderr)
3062 return PerlIO_flush(f);
3063 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3064 Use Sarathy's trick from maint-5.6 to invalidate the
3065 fileno slot of the FILE *
3067 result = PerlIO_flush(f);
3069 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3071 dupfd = PerlLIO_dup(fd);
3073 result = PerlSIO_fclose(stdio);
3074 /* We treat error from stdio as success if we invalidated
3075 errno may NOT be expected EBADF
3077 if (invalidate && result != 0) {
3081 #ifdef SOCKS5_VERSION_NAME
3082 /* in SOCKS' case, let close() determine return value */
3086 PerlLIO_dup2(dupfd,fd);
3087 PerlLIO_close(dupfd);
3094 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3097 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3101 STDCHAR *buf = (STDCHAR *) vbuf;
3103 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3104 * stdio does not do that for fread()
3106 const int ch = PerlSIO_fgetc(s);
3113 got = PerlSIO_fread(vbuf, 1, count, s);
3114 if (got == 0 && PerlSIO_ferror(s))
3116 if (got >= 0 || errno != EINTR)
3119 SETERRNO(0,0); /* just in case */
3125 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3128 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3130 #ifdef STDIO_BUFFER_WRITABLE
3131 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3132 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3133 STDCHAR *base = PerlIO_get_base(f);
3134 SSize_t cnt = PerlIO_get_cnt(f);
3135 STDCHAR *ptr = PerlIO_get_ptr(f);
3136 SSize_t avail = ptr - base;
3138 if (avail > count) {
3142 Move(buf-avail,ptr,avail,STDCHAR);
3145 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3146 if (PerlSIO_feof(s) && unread >= 0)
3147 PerlSIO_clearerr(s);
3152 if (PerlIO_has_cntptr(f)) {
3153 /* We can get pointer to buffer but not its base
3154 Do ungetc() but check chars are ending up in the
3157 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3158 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3160 const int ch = *--buf & 0xFF;
3161 if (ungetc(ch,s) != ch) {
3162 /* ungetc did not work */
3165 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3166 /* Did not change pointer as expected */
3167 fgetc(s); /* get char back again */
3177 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3183 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3188 got = PerlSIO_fwrite(vbuf, 1, count,
3189 PerlIOSelf(f, PerlIOStdio)->stdio);
3190 if (got >= 0 || errno != EINTR)
3193 SETERRNO(0,0); /* just in case */
3199 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3201 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3202 PERL_UNUSED_CONTEXT;
3204 return PerlSIO_fseek(stdio, offset, whence);
3208 PerlIOStdio_tell(pTHX_ PerlIO *f)
3210 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3211 PERL_UNUSED_CONTEXT;
3213 return PerlSIO_ftell(stdio);
3217 PerlIOStdio_flush(pTHX_ PerlIO *f)
3219 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3220 PERL_UNUSED_CONTEXT;
3222 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3223 return PerlSIO_fflush(stdio);
3229 * FIXME: This discards ungetc() and pre-read stuff which is not
3230 * right if this is just a "sync" from a layer above Suspect right
3231 * design is to do _this_ but not have layer above flush this
3232 * layer read-to-read
3235 * Not writeable - sync by attempting a seek
3237 const int err = errno;
3238 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3246 PerlIOStdio_eof(pTHX_ PerlIO *f)
3248 PERL_UNUSED_CONTEXT;
3250 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3254 PerlIOStdio_error(pTHX_ PerlIO *f)
3256 PERL_UNUSED_CONTEXT;
3258 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3262 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3264 PERL_UNUSED_CONTEXT;
3266 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3270 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3272 PERL_UNUSED_CONTEXT;
3274 #ifdef HAS_SETLINEBUF
3275 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3277 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3283 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3285 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3286 return (STDCHAR*)PerlSIO_get_base(stdio);
3290 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3292 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3293 return PerlSIO_get_bufsiz(stdio);
3297 #ifdef USE_STDIO_PTR
3299 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3301 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3302 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3306 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3308 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3309 return PerlSIO_get_cnt(stdio);
3313 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3315 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3317 #ifdef STDIO_PTR_LVALUE
3318 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3319 #ifdef STDIO_PTR_LVAL_SETS_CNT
3320 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3321 assert(PerlSIO_get_cnt(stdio) == (cnt));
3324 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3326 * Setting ptr _does_ change cnt - we are done
3330 #else /* STDIO_PTR_LVALUE */
3332 #endif /* STDIO_PTR_LVALUE */
3335 * Now (or only) set cnt
3337 #ifdef STDIO_CNT_LVALUE
3338 PerlSIO_set_cnt(stdio, cnt);
3339 #else /* STDIO_CNT_LVALUE */
3340 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3341 PerlSIO_set_ptr(stdio,
3342 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3344 #else /* STDIO_PTR_LVAL_SETS_CNT */
3346 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3347 #endif /* STDIO_CNT_LVALUE */
3354 PerlIOStdio_fill(pTHX_ PerlIO *f)
3356 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3358 PERL_UNUSED_CONTEXT;
3361 * fflush()ing read-only streams can cause trouble on some stdio-s
3363 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3364 if (PerlSIO_fflush(stdio) != 0)
3367 c = PerlSIO_fgetc(stdio);
3371 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3373 #ifdef STDIO_BUFFER_WRITABLE
3374 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3375 /* Fake ungetc() to the real buffer in case system's ungetc
3378 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3379 SSize_t cnt = PerlSIO_get_cnt(stdio);
3380 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3381 if (ptr == base+1) {
3382 *--ptr = (STDCHAR) c;
3383 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3384 if (PerlSIO_feof(stdio))
3385 PerlSIO_clearerr(stdio);
3391 if (PerlIO_has_cntptr(f)) {
3393 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3400 /* An ungetc()d char is handled separately from the regular
3401 * buffer, so we stuff it in the buffer ourselves.
3402 * Should never get called as should hit code above
3404 *(--((*stdio)->_ptr)) = (unsigned char) c;
3407 /* If buffer snoop scheme above fails fall back to
3410 if (PerlSIO_ungetc(c, stdio) != c)
3418 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3419 sizeof(PerlIO_funcs),
3421 sizeof(PerlIOStdio),
3422 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3426 PerlIOBase_binmode, /* binmode */
3440 PerlIOStdio_clearerr,
3441 PerlIOStdio_setlinebuf,
3443 PerlIOStdio_get_base,
3444 PerlIOStdio_get_bufsiz,
3449 #ifdef USE_STDIO_PTR
3450 PerlIOStdio_get_ptr,
3451 PerlIOStdio_get_cnt,
3452 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3453 PerlIOStdio_set_ptrcnt,
3456 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3461 #endif /* USE_STDIO_PTR */
3464 /* Note that calls to PerlIO_exportFILE() are reversed using
3465 * PerlIO_releaseFILE(), not importFILE. */
3467 PerlIO_exportFILE(PerlIO * f, const char *mode)
3471 if (PerlIOValid(f)) {
3474 if (!mode || !*mode) {
3475 mode = PerlIO_modestr(f, buf);
3477 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3481 /* De-link any lower layers so new :stdio sticks */
3483 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3484 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3486 /* Link previous lower layers under new one */
3490 /* restore layers list */
3500 PerlIO_findFILE(PerlIO *f)
3504 if (l->tab == &PerlIO_stdio) {
3505 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3508 l = *PerlIONext(&l);
3510 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3511 return PerlIO_exportFILE(f, NULL);
3514 /* Use this to reverse PerlIO_exportFILE calls. */
3516 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3521 if (l->tab == &PerlIO_stdio) {
3522 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3523 if (s->stdio == f) {
3525 PerlIO_pop(aTHX_ p);
3534 /*--------------------------------------------------------------------------------------*/
3536 * perlio buffer layer
3540 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3542 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3543 const int fd = PerlIO_fileno(f);
3544 if (fd >= 0 && PerlLIO_isatty(fd)) {
3545 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3547 if (*PerlIONext(f)) {
3548 const Off_t posn = PerlIO_tell(PerlIONext(f));
3549 if (posn != (Off_t) - 1) {
3553 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3557 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3558 IV n, const char *mode, int fd, int imode, int perm,
3559 PerlIO *f, int narg, SV **args)
3561 if (PerlIOValid(f)) {
3562 PerlIO *next = PerlIONext(f);
3564 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3565 if (tab && tab->Open)
3567 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3569 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3574 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3576 if (*mode == IoTYPE_IMPLICIT) {
3582 if (tab && tab->Open)
3583 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3586 SETERRNO(EINVAL, LIB_INVARG);
3588 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3590 * if push fails during open, open fails. close will pop us.
3595 fd = PerlIO_fileno(f);
3596 if (init && fd == 2) {
3598 * Initial stderr is unbuffered
3600 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3602 #ifdef PERLIO_USING_CRLF
3603 # ifdef PERLIO_IS_BINMODE_FD
3604 if (PERLIO_IS_BINMODE_FD(fd))
3605 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3609 * do something about failing setmode()? --jhi
3611 PerlLIO_setmode(fd, O_BINARY);
3620 * This "flush" is akin to sfio's sync in that it handles files in either
3621 * read or write state. For write state, we put the postponed data through
3622 * the next layers. For read state, we seek() the next layers to the
3623 * offset given by current position in the buffer, and discard the buffer
3624 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3625 * in any case?). Then the pass the stick further in chain.
3628 PerlIOBuf_flush(pTHX_ PerlIO *f)
3630 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3632 PerlIO *n = PerlIONext(f);
3633 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3635 * write() the buffer
3637 const STDCHAR *buf = b->buf;
3638 const STDCHAR *p = buf;
3639 while (p < b->ptr) {
3640 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3644 else if (count < 0 || PerlIO_error(n)) {
3645 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3650 b->posn += (p - buf);
3652 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3653 STDCHAR *buf = PerlIO_get_base(f);
3655 * Note position change
3657 b->posn += (b->ptr - buf);
3658 if (b->ptr < b->end) {
3659 /* We did not consume all of it - try and seek downstream to
3660 our logical position
3662 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3663 /* Reload n as some layers may pop themselves on seek */
3664 b->posn = PerlIO_tell(n = PerlIONext(f));
3667 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3668 data is lost for good - so return saying "ok" having undone
3671 b->posn -= (b->ptr - buf);
3676 b->ptr = b->end = b->buf;
3677 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3678 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3679 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3684 /* This discards the content of the buffer after b->ptr, and rereads
3685 * the buffer from the position off in the layer downstream; here off
3686 * is at offset corresponding to b->ptr - b->buf.
3689 PerlIOBuf_fill(pTHX_ PerlIO *f)
3691 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3692 PerlIO *n = PerlIONext(f);
3695 * Down-stream flush is defined not to loose read data so is harmless.
3696 * we would not normally be fill'ing if there was data left in anycase.
3698 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3700 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3701 PerlIOBase_flush_linebuf(aTHX);
3704 PerlIO_get_base(f); /* allocate via vtable */
3706 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3708 b->ptr = b->end = b->buf;
3710 if (!PerlIOValid(n)) {
3711 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3715 if (PerlIO_fast_gets(n)) {
3717 * Layer below is also buffered. We do _NOT_ want to call its
3718 * ->Read() because that will loop till it gets what we asked for
3719 * which may hang on a pipe etc. Instead take anything it has to
3720 * hand, or ask it to fill _once_.
3722 avail = PerlIO_get_cnt(n);
3724 avail = PerlIO_fill(n);
3726 avail = PerlIO_get_cnt(n);
3728 if (!PerlIO_error(n) && PerlIO_eof(n))
3733 STDCHAR *ptr = PerlIO_get_ptr(n);
3734 const SSize_t cnt = avail;
3735 if (avail > (SSize_t)b->bufsiz)
3737 Copy(ptr, b->buf, avail, STDCHAR);
3738 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3742 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3746 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3748 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3751 b->end = b->buf + avail;
3752 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3757 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3759 if (PerlIOValid(f)) {
3760 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3763 return PerlIOBase_read(aTHX_ f, vbuf, count);
3769 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3771 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3772 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3775 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3780 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3782 * Buffer is already a read buffer, we can overwrite any chars
3783 * which have been read back to buffer start
3785 avail = (b->ptr - b->buf);
3789 * Buffer is idle, set it up so whole buffer is available for
3793 b->end = b->buf + avail;
3795 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3797 * Buffer extends _back_ from where we are now
3799 b->posn -= b->bufsiz;
3801 if (avail > (SSize_t) count) {
3803 * If we have space for more than count, just move count
3811 * In simple stdio-like ungetc() case chars will be already
3814 if (buf != b->ptr) {
3815 Copy(buf, b->ptr, avail, STDCHAR);
3819 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3823 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3829 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3831 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3832 const STDCHAR *buf = (const STDCHAR *) vbuf;
3833 const STDCHAR *flushptr = buf;
3837 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3839 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3840 if (PerlIO_flush(f) != 0) {
3844 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3845 flushptr = buf + count;
3846 while (flushptr > buf && *(flushptr - 1) != '\n')
3850 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3851 if ((SSize_t) count < avail)
3853 if (flushptr > buf && flushptr <= buf + avail)
3854 avail = flushptr - buf;
3855 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3857 Copy(buf, b->ptr, avail, STDCHAR);
3862 if (buf == flushptr)
3865 if (b->ptr >= (b->buf + b->bufsiz))
3868 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3874 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3877 if ((code = PerlIO_flush(f)) == 0) {
3878 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3879 code = PerlIO_seek(PerlIONext(f), offset, whence);
3881 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3882 b->posn = PerlIO_tell(PerlIONext(f));
3889 PerlIOBuf_tell(pTHX_ PerlIO *f)
3891 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3893 * b->posn is file position where b->buf was read, or will be written
3895 Off_t posn = b->posn;
3896 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3897 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3899 /* As O_APPEND files are normally shared in some sense it is better
3904 /* when file is NOT shared then this is sufficient */
3905 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3907 posn = b->posn = PerlIO_tell(PerlIONext(f));
3911 * If buffer is valid adjust position by amount in buffer
3913 posn += (b->ptr - b->buf);
3919 PerlIOBuf_popped(pTHX_ PerlIO *f)
3921 const IV code = PerlIOBase_popped(aTHX_ f);
3922 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3923 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3926 b->ptr = b->end = b->buf = NULL;
3927 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3932 PerlIOBuf_close(pTHX_ PerlIO *f)
3934 const IV code = PerlIOBase_close(aTHX_ f);
3935 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3936 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3939 b->ptr = b->end = b->buf = NULL;
3940 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3945 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3947 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3954 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3956 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3959 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3960 return (b->end - b->ptr);
3965 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3967 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3968 PERL_UNUSED_CONTEXT;
3973 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3975 b->buf = (STDCHAR *) & b->oneword;
3976 b->bufsiz = sizeof(b->oneword);
3978 b->end = b->ptr = b->buf;
3984 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3986 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3989 return (b->end - b->buf);
3993 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3995 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3999 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4000 assert(PerlIO_get_cnt(f) == cnt);
4001 assert(b->ptr >= b->buf);
4003 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4007 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4009 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4014 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4015 sizeof(PerlIO_funcs),
4018 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4022 PerlIOBase_binmode, /* binmode */
4036 PerlIOBase_clearerr,
4037 PerlIOBase_setlinebuf,
4042 PerlIOBuf_set_ptrcnt,
4045 /*--------------------------------------------------------------------------------------*/
4047 * Temp layer to hold unread chars when cannot do it any other way
4051 PerlIOPending_fill(pTHX_ PerlIO *f)
4054 * Should never happen
4061 PerlIOPending_close(pTHX_ PerlIO *f)
4064 * A tad tricky - flush pops us, then we close new top
4067 return PerlIO_close(f);
4071 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4074 * A tad tricky - flush pops us, then we seek new top
4077 return PerlIO_seek(f, offset, whence);
4082 PerlIOPending_flush(pTHX_ PerlIO *f)
4084 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4085 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4089 PerlIO_pop(aTHX_ f);
4094 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4100 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4105 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4107 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4108 PerlIOl * const l = PerlIOBase(f);
4110 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4111 * etc. get muddled when it changes mid-string when we auto-pop.
4113 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4114 (PerlIOBase(PerlIONext(f))->
4115 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4120 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4122 SSize_t avail = PerlIO_get_cnt(f);
4124 if ((SSize_t)count < avail)
4127 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4128 if (got >= 0 && got < (SSize_t)count) {
4129 const SSize_t more =
4130 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4131 if (more >= 0 || got == 0)
4137 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4138 sizeof(PerlIO_funcs),
4141 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4142 PerlIOPending_pushed,
4145 PerlIOBase_binmode, /* binmode */
4154 PerlIOPending_close,
4155 PerlIOPending_flush,
4159 PerlIOBase_clearerr,
4160 PerlIOBase_setlinebuf,
4165 PerlIOPending_set_ptrcnt,
4170 /*--------------------------------------------------------------------------------------*/
4172 * crlf - translation On read translate CR,LF to "\n" we do this by
4173 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4174 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4176 * c->nl points on the first byte of CR LF pair when it is temporarily
4177 * replaced by LF, or to the last CR of the buffer. In the former case
4178 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4179 * that it ends at c->nl; these two cases can be distinguished by
4180 * *c->nl. c->nl is set during _getcnt() call, and unset during
4181 * _unread() and _flush() calls.
4182 * It only matters for read operations.
4186 PerlIOBuf base; /* PerlIOBuf stuff */
4187 STDCHAR *nl; /* Position of crlf we "lied" about in the
4192 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4195 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4196 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4198 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4199 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4200 PerlIOBase(f)->flags);
4203 /* Enable the first CRLF capable layer you can find, but if none
4204 * found, the one we just pushed is fine. This results in at
4205 * any given moment at most one CRLF-capable layer being enabled
4206 * in the whole layer stack. */
4207 PerlIO *g = PerlIONext(f);
4209 PerlIOl *b = PerlIOBase(g);
4210 if (b && b->tab == &PerlIO_crlf) {
4211 if (!(b->flags & PERLIO_F_CRLF))
4212 b->flags |= PERLIO_F_CRLF;
4213 PerlIO_pop(aTHX_ f);
4224 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4226 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4227 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4231 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4232 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4234 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4235 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4237 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4242 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4243 b->end = b->ptr = b->buf + b->bufsiz;
4244 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4245 b->posn -= b->bufsiz;
4247 while (count > 0 && b->ptr > b->buf) {
4248 const int ch = *--buf;
4250 if (b->ptr - 2 >= b->buf) {
4257 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4258 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4274 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4276 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4278 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4281 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4282 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4283 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4284 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4286 while (nl < b->end && *nl != 0xd)
4288 if (nl < b->end && *nl == 0xd) {
4290 if (nl + 1 < b->end) {
4297 * Not CR,LF but just CR
4305 * Blast - found CR as last char in buffer
4310 * They may not care, defer work as long as
4314 return (nl - b->ptr);
4318 b->ptr++; /* say we have read it as far as
4319 * flush() is concerned */
4320 b->buf++; /* Leave space in front of buffer */
4321 /* Note as we have moved buf up flush's
4323 will naturally make posn point at CR
4325 b->bufsiz--; /* Buffer is thus smaller */
4326 code = PerlIO_fill(f); /* Fetch some more */
4327 b->bufsiz++; /* Restore size for next time */
4328 b->buf--; /* Point at space */
4329 b->ptr = nl = b->buf; /* Which is what we hand
4331 *nl = 0xd; /* Fill in the CR */
4333 goto test; /* fill() call worked */
4335 * CR at EOF - just fall through
4337 /* Should we clear EOF though ??? */
4342 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4348 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4350 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4351 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4357 if (ptr == b->end && *c->nl == 0xd) {
4358 /* Defered CR at end of buffer case - we lied about count */
4371 * Test code - delete when it works ...
4373 IV flags = PerlIOBase(f)->flags;
4374 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4375 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4376 /* Defered CR at end of buffer case - we lied about count */
4382 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4383 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4391 * They have taken what we lied about
4399 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4403 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4405 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4406 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4408 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4409 const STDCHAR *buf = (const STDCHAR *) vbuf;
4410 const STDCHAR * const ebuf = buf + count;
4413 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4415 while (buf < ebuf) {
4416 const STDCHAR * const eptr = b->buf + b->bufsiz;
4417 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4418 while (buf < ebuf && b->ptr < eptr) {
4420 if ((b->ptr + 2) > eptr) {
4428 *(b->ptr)++ = 0xd; /* CR */
4429 *(b->ptr)++ = 0xa; /* LF */
4431 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4438 *(b->ptr)++ = *buf++;
4440 if (b->ptr >= eptr) {
4446 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4448 return (buf - (STDCHAR *) vbuf);
4453 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4455 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4460 return PerlIOBuf_flush(aTHX_ f);
4464 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4466 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4467 /* In text mode - flush any pending stuff and flip it */
4468 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4469 #ifndef PERLIO_USING_CRLF
4470 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4471 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4472 PerlIO_pop(aTHX_ f);
4479 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4480 sizeof(PerlIO_funcs),
4483 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4485 PerlIOBuf_popped, /* popped */
4487 PerlIOCrlf_binmode, /* binmode */
4491 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4492 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4493 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4501 PerlIOBase_clearerr,
4502 PerlIOBase_setlinebuf,
4507 PerlIOCrlf_set_ptrcnt,
4511 /*--------------------------------------------------------------------------------------*/
4513 * mmap as "buffer" layer
4517 PerlIOBuf base; /* PerlIOBuf stuff */
4518 Mmap_t mptr; /* Mapped address */
4519 Size_t len; /* mapped length */
4520 STDCHAR *bbuf; /* malloced buffer if map fails */
4524 PerlIOMmap_map(pTHX_ PerlIO *f)
4527 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4528 const IV flags = PerlIOBase(f)->flags;
4532 if (flags & PERLIO_F_CANREAD) {
4533 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4534 const int fd = PerlIO_fileno(f);
4536 code = Fstat(fd, &st);
4537 if (code == 0 && S_ISREG(st.st_mode)) {
4538 SSize_t len = st.st_size - b->posn;
4541 if (PL_mmap_page_size <= 0)
4542 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4546 * This is a hack - should never happen - open should
4549 b->posn = PerlIO_tell(PerlIONext(f));
4551 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4552 len = st.st_size - posn;
4553 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4554 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4555 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4556 madvise(m->mptr, len, MADV_SEQUENTIAL);
4558 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4559 madvise(m->mptr, len, MADV_WILLNEED);
4561 PerlIOBase(f)->flags =
4562 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4563 b->end = ((STDCHAR *) m->mptr) + len;
4564 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4573 PerlIOBase(f)->flags =
4574 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4576 b->ptr = b->end = b->ptr;
4585 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4587 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4590 PerlIOBuf * const b = &m->base;
4592 code = munmap(m->mptr, m->len);
4596 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4599 b->ptr = b->end = b->buf;
4600 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4606 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4608 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4609 PerlIOBuf * const b = &m->base;
4610 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4612 * Already have a readbuffer in progress
4618 * We have a write buffer or flushed PerlIOBuf read buffer
4620 m->bbuf = b->buf; /* save it in case we need it again */
4621 b->buf = NULL; /* Clear to trigger below */
4624 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4627 * Map did not work - recover PerlIOBuf buffer if we have one
4632 b->ptr = b->end = b->buf;
4635 return PerlIOBuf_get_base(aTHX_ f);
4639 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4641 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4642 PerlIOBuf * const b = &m->base;
4643 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4645 if (b->ptr && (b->ptr - count) >= b->buf
4646 && memEQ(b->ptr - count, vbuf, count)) {
4648 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4653 * Loose the unwritable mapped buffer
4657 * If flush took the "buffer" see if we have one from before
4659 if (!b->buf && m->bbuf)
4662 PerlIOBuf_get_base(aTHX_ f);
4666 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4670 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4672 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4673 PerlIOBuf * const b = &m->base;
4675 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4677 * No, or wrong sort of, buffer
4680 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4684 * If unmap took the "buffer" see if we have one from before
4686 if (!b->buf && m->bbuf)
4689 PerlIOBuf_get_base(aTHX_ f);
4693 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4697 PerlIOMmap_flush(pTHX_ PerlIO *f)
4699 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4700 PerlIOBuf * const b = &m->base;
4701 IV code = PerlIOBuf_flush(aTHX_ f);
4703 * Now we are "synced" at PerlIOBuf level
4710 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4715 * We seem to have a PerlIOBuf buffer which was not mapped
4716 * remember it in case we need one later
4725 PerlIOMmap_fill(pTHX_ PerlIO *f)
4727 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4728 IV code = PerlIO_flush(f);
4729 if (code == 0 && !b->buf) {
4730 code = PerlIOMmap_map(aTHX_ f);
4732 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4733 code = PerlIOBuf_fill(aTHX_ f);
4739 PerlIOMmap_close(pTHX_ PerlIO *f)
4741 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4742 PerlIOBuf * const b = &m->base;
4743 IV code = PerlIO_flush(f);
4747 b->ptr = b->end = b->buf;
4749 if (PerlIOBuf_close(aTHX_ f) != 0)
4755 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4757 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4761 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4762 sizeof(PerlIO_funcs),
4765 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4769 PerlIOBase_binmode, /* binmode */
4783 PerlIOBase_clearerr,
4784 PerlIOBase_setlinebuf,
4785 PerlIOMmap_get_base,
4789 PerlIOBuf_set_ptrcnt,
4792 #endif /* HAS_MMAP */
4795 Perl_PerlIO_stdin(pTHX)
4799 PerlIO_stdstreams(aTHX);
4801 return &PL_perlio[1];
4805 Perl_PerlIO_stdout(pTHX)
4809 PerlIO_stdstreams(aTHX);
4811 return &PL_perlio[2];
4815 Perl_PerlIO_stderr(pTHX)
4819 PerlIO_stdstreams(aTHX);
4821 return &PL_perlio[3];
4824 /*--------------------------------------------------------------------------------------*/
4827 PerlIO_getname(PerlIO *f, char *buf)
4832 bool exported = FALSE;
4833 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4835 stdio = PerlIO_exportFILE(f,0);
4839 name = fgetname(stdio, buf);
4840 if (exported) PerlIO_releaseFILE(f,stdio);
4845 PERL_UNUSED_ARG(buf);
4846 Perl_croak(aTHX_ "Don't know how to get file name");
4852 /*--------------------------------------------------------------------------------------*/
4854 * Functions which can be called on any kind of PerlIO implemented in
4858 #undef PerlIO_fdopen
4860 PerlIO_fdopen(int fd, const char *mode)
4863 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4868 PerlIO_open(const char *path, const char *mode)
4871 SV *name = sv_2mortal(newSVpv(path, 0));
4872 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4875 #undef Perlio_reopen
4877 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4880 SV *name = sv_2mortal(newSVpv(path,0));
4881 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4886 PerlIO_getc(PerlIO *f)
4890 if ( 1 == PerlIO_read(f, buf, 1) ) {
4891 return (unsigned char) buf[0];
4896 #undef PerlIO_ungetc
4898 PerlIO_ungetc(PerlIO *f, int ch)
4903 if (PerlIO_unread(f, &buf, 1) == 1)
4911 PerlIO_putc(PerlIO *f, int ch)
4915 return PerlIO_write(f, &buf, 1);
4920 PerlIO_puts(PerlIO *f, const char *s)
4923 return PerlIO_write(f, s, strlen(s));
4926 #undef PerlIO_rewind
4928 PerlIO_rewind(PerlIO *f)
4931 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4935 #undef PerlIO_vprintf
4937 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4940 SV * const sv = newSVpvs("");
4946 Perl_va_copy(ap, apc);
4947 sv_vcatpvf(sv, fmt, &apc);
4949 sv_vcatpvf(sv, fmt, &ap);
4951 s = SvPV_const(sv, len);
4952 wrote = PerlIO_write(f, s, len);
4957 #undef PerlIO_printf
4959 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4964 result = PerlIO_vprintf(f, fmt, ap);
4969 #undef PerlIO_stdoutf
4971 PerlIO_stdoutf(const char *fmt, ...)
4977 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4982 #undef PerlIO_tmpfile
4984 PerlIO_tmpfile(void)
4989 const int fd = win32_tmpfd();
4991 f = PerlIO_fdopen(fd, "w+b");
4993 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4994 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
4996 * I have no idea how portable mkstemp() is ... NI-S
4998 const int fd = mkstemp(SvPVX(sv));
5000 f = PerlIO_fdopen(fd, "w+");
5002 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5003 PerlLIO_unlink(SvPVX_const(sv));
5006 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5007 FILE * const stdio = PerlSIO_tmpfile();
5010 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5011 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5013 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5019 # endif /* else HAS_MKSTEMP */
5020 #endif /* else WIN32 */
5027 #endif /* USE_SFIO */
5028 #endif /* PERLIO_IS_STDIO */
5030 /*======================================================================================*/
5032 * Now some functions in terms of above which may be needed even if we are
5033 * not in true PerlIO mode
5036 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5039 const char *type = NULL;
5041 * Need to supply default layer info from open.pm
5043 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5045 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5050 type = SvPV_const(layers, len);
5051 if (type && mode && mode[0] != 'r') {
5053 * Skip to write part, which is separated by a '\0'
5055 STRLEN read_len = strlen(type);
5056 if (read_len < len) {
5057 type += read_len + 1;
5067 #undef PerlIO_setpos
5069 PerlIO_setpos(PerlIO *f, SV *pos)
5074 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5075 if (f && len == sizeof(Off_t))
5076 return PerlIO_seek(f, *posn, SEEK_SET);
5078 SETERRNO(EINVAL, SS_IVCHAN);
5082 #undef PerlIO_setpos
5084 PerlIO_setpos(PerlIO *f, SV *pos)
5089 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5090 if (f && len == sizeof(Fpos_t)) {
5091 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5092 return fsetpos64(f, fpos);
5094 return fsetpos(f, fpos);
5098 SETERRNO(EINVAL, SS_IVCHAN);
5104 #undef PerlIO_getpos
5106 PerlIO_getpos(PerlIO *f, SV *pos)
5109 Off_t posn = PerlIO_tell(f);
5110 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5111 return (posn == (Off_t) - 1) ? -1 : 0;
5114 #undef PerlIO_getpos
5116 PerlIO_getpos(PerlIO *f, SV *pos)
5121 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5122 code = fgetpos64(f, &fpos);
5124 code = fgetpos(f, &fpos);
5126 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5131 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5134 vprintf(char *pat, char *args)
5136 _doprnt(pat, args, stdout);
5137 return 0; /* wrong, but perl doesn't use the return
5142 vfprintf(FILE *fd, char *pat, char *args)
5144 _doprnt(pat, args, fd);
5145 return 0; /* wrong, but perl doesn't use the return
5151 #ifndef PerlIO_vsprintf
5153 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5156 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5157 PERL_UNUSED_CONTEXT;
5159 #ifndef PERL_MY_VSNPRINTF_GUARDED
5160 if (val < 0 || (n > 0 ? val >= n : 0)) {
5161 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5168 #ifndef PerlIO_sprintf
5170 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5175 result = PerlIO_vsprintf(s, n, fmt, ap);
5183 * c-indentation-style: bsd
5185 * indent-tabs-mode: t
5188 * ex: set ts=8 sts=4 sw=4 noet: