2 * perlio.c Copyright (c) 1996-2001, 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 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
9 * at the dispatch tables, even when we do not need it for other reasons.
10 * Invent a dSYS macro to abstract this out
12 #ifdef PERL_IMPLICIT_SYS
25 #define PERLIO_NOT_STDIO 0
26 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 * This file provides those parts of PerlIO abstraction
33 * which are not #defined in perlio.h.
34 * Which these are depends on various Configure #ifdef's
38 #define PERL_IN_PERLIO_C
41 #ifdef PERL_IMPLICIT_CONTEXT
49 perlsio_binmode(FILE *fp, int iotype, int mode)
52 * This used to be contents of do_binmode in doio.c
55 # if defined(atarist) || defined(__MINT__)
58 ((FILE *) fp)->_flag |= _IOBIN;
60 ((FILE *) fp)->_flag &= ~_IOBIN;
67 if (PerlLIO_setmode(fp, mode) != -1) {
69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
71 # if defined(WIN32) && defined(__BORLANDC__)
73 * The translation mode of the stream is maintained independent of
74 * the translation mode of the fd in the Borland RTL (heavy
75 * digging through their runtime sources reveal). User has to set
76 * the mode explicitly for the stream (though they don't document
77 * this anywhere). GSAR 97-5-24
91 # if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
103 #define O_ACCMODE 3 /* Assume traditional implementation */
107 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
109 int result = rawmode & O_ACCMODE;
114 ptype = IoTYPE_RDONLY;
117 ptype = IoTYPE_WRONLY;
125 *writing = (result != O_RDONLY);
127 if (result == O_RDONLY) {
131 else if (rawmode & O_APPEND) {
133 if (result != O_WRONLY)
138 if (result == O_WRONLY)
145 if (rawmode & O_BINARY)
151 #ifndef PERLIO_LAYERS
153 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
155 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
158 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
166 PerlIO_destruct(pTHX)
171 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
176 return perlsio_binmode(fp, iotype, mode);
181 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
185 int fd = PerlLIO_dup(PerlIO_fileno(f));
188 int omode = fcntl(fd, F_GETFL);
189 PerlIO_intmode2str(omode,mode,NULL);
190 /* the r+ is a hack */
191 return PerlIO_fdopen(fd, mode);
196 SETERRNO(EBADF, SS$_IVCHAN);
204 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
208 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
209 int imode, int perm, PerlIO *old, int narg, SV **args)
213 Perl_croak(aTHX_ "More than one argument to open");
215 if (*args == &PL_sv_undef)
216 return PerlIO_tmpfile();
218 char *name = SvPV_nolen(*args);
220 fd = PerlLIO_open3(name, imode, perm);
222 return PerlIO_fdopen(fd, (char *) mode + 1);
225 return PerlIO_reopen(name, mode, old);
228 return PerlIO_open(name, mode);
233 return PerlIO_fdopen(fd, (char *) mode);
238 XS(XS_PerlIO__Layer__find)
242 Perl_croak(aTHX_ "Usage class->find(name[,load])");
244 char *name = SvPV_nolen(ST(1));
245 ST(0) = (strEQ(name, "crlf")
246 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
253 Perl_boot_core_PerlIO(pTHX)
255 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
261 #ifdef PERLIO_IS_STDIO
267 * Does nothing (yet) except force this file to be included in perl
268 * binary. That allows this file to force inclusion of other functions
269 * that may be required by loadable extensions e.g. for
270 * FileHandle::tmpfile
274 #undef PerlIO_tmpfile
281 #else /* PERLIO_IS_STDIO */
289 * This section is just to make sure these functions get pulled in from
293 #undef PerlIO_tmpfile
304 * Force this file to be included in perl binary. Which allows this
305 * file to force inclusion of other functions that may be required by
306 * loadable extensions e.g. for FileHandle::tmpfile
310 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
311 * results in a lot of lseek()s to regular files and lot of small
314 sfset(sfstdout, SF_SHARE, 0);
318 PerlIO_importFILE(FILE *stdio, int fl)
320 int fd = fileno(stdio);
321 PerlIO *r = PerlIO_fdopen(fd, "r+");
326 PerlIO_findFILE(PerlIO *pio)
328 int fd = PerlIO_fileno(pio);
329 FILE *f = fdopen(fd, "r+");
331 if (!f && errno == EINVAL)
333 if (!f && errno == EINVAL)
340 /*======================================================================================*/
342 * Implement all the PerlIO interface ourselves.
348 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
355 #include <sys/mman.h>
359 void PerlIO_debug(const char *fmt, ...)
360 __attribute__ ((format(__printf__, 1, 2)));
363 PerlIO_debug(const char *fmt, ...)
370 char *s = PerlEnv_getenv("PERLIO_DEBUG");
372 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
379 /* Use fixed buffer as sv_catpvf etc. needs SVs */
383 s = CopFILE(PL_curcop);
386 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
387 len = strlen(buffer);
388 vsprintf(buffer+len, fmt, ap);
389 PerlLIO_write(dbg, buffer, strlen(buffer));
391 SV *sv = newSVpvn("", 0);
394 s = CopFILE(PL_curcop);
397 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
398 (IV) CopLINE(PL_curcop));
399 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
402 PerlLIO_write(dbg, s, len);
409 /*--------------------------------------------------------------------------------------*/
412 * Inner level routines
416 * Table of pointers to the PerlIO structs (malloc'ed)
418 #define PERLIO_TABLE_SIZE 64
421 PerlIO_allocate(pTHX)
424 * Find a free slot in the table, allocating new table as necessary
429 while ((f = *last)) {
431 last = (PerlIO **) (f);
432 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
438 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
446 #undef PerlIO_fdupopen
448 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
451 PerlIO_funcs *tab = PerlIOBase(f)->tab;
453 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
454 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
458 SETERRNO(EBADF, SS$_IVCHAN);
464 PerlIO_cleantable(pTHX_ PerlIO **tablep)
466 PerlIO *table = *tablep;
469 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
470 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
471 PerlIO *f = table + i;
483 PerlIO_list_alloc(pTHX)
486 Newz('L', list, 1, PerlIO_list_t);
492 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
495 if (--list->refcnt == 0) {
498 for (i = 0; i < list->cur; i++) {
499 if (list->array[i].arg)
500 SvREFCNT_dec(list->array[i].arg);
502 Safefree(list->array);
510 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
513 if (list->cur >= list->len) {
516 Renew(list->array, list->len, PerlIO_pair_t);
518 New('l', list->array, list->len, PerlIO_pair_t);
520 p = &(list->array[list->cur++]);
522 if ((p->arg = arg)) {
528 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
530 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
533 list = PerlIO_list_alloc(aTHX);
534 for (i=0; i < proto->cur; i++) {
536 if (proto->array[i].arg)
537 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
538 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
545 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
548 PerlIO **table = &proto->Iperlio;
551 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
552 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
553 PerlIO_allocate(aTHX); /* root slot is never used */
554 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
555 while ((f = *table)) {
557 table = (PerlIO **) (f++);
558 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
560 (void) fp_dup(f, 0, param);
569 PerlIO_destruct(pTHX)
571 PerlIO **table = &PL_perlio;
574 PerlIO_debug("Destruct %p\n",aTHX);
576 while ((f = *table)) {
578 table = (PerlIO **) (f++);
579 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
583 if (l->tab->kind & PERLIO_K_DESTRUCT) {
584 PerlIO_debug("Destruct popping %s\n", l->tab->name);
595 PerlIO_list_free(aTHX_ PL_known_layers);
596 PL_known_layers = NULL;
597 PerlIO_list_free(aTHX_ PL_def_layerlist);
598 PL_def_layerlist = NULL;
602 PerlIO_pop(pTHX_ PerlIO *f)
606 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
607 if (l->tab->Popped) {
609 * If popped returns non-zero do not free its layer structure
610 * it has either done so itself, or it is shared and still in
613 if ((*l->tab->Popped) (aTHX_ f) != 0)
621 /*--------------------------------------------------------------------------------------*/
623 * XS Interface for perl code
627 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
630 if ((SSize_t) len <= 0)
632 for (i = 0; i < PL_known_layers->cur; i++) {
633 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
634 if (memEQ(f->name, name, len)) {
635 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
639 if (load && PL_subname && PL_def_layerlist
640 && PL_def_layerlist->cur >= 2) {
641 SV *pkgsv = newSVpvn("PerlIO", 6);
642 SV *layer = newSVpvn(name, len);
645 * The two SVs are magically freed by load_module
647 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
649 return PerlIO_find_layer(aTHX_ name, len, 0);
651 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
655 #ifdef USE_ATTRIBUTES_FOR_PERLIO
658 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
661 IO *io = GvIOn((GV *) SvRV(sv));
662 PerlIO *ifp = IoIFP(io);
663 PerlIO *ofp = IoOFP(io);
664 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
670 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
673 IO *io = GvIOn((GV *) SvRV(sv));
674 PerlIO *ifp = IoIFP(io);
675 PerlIO *ofp = IoOFP(io);
676 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
682 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
684 Perl_warn(aTHX_ "clear %" SVf, sv);
689 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
691 Perl_warn(aTHX_ "free %" SVf, sv);
695 MGVTBL perlio_vtab = {
703 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
706 SV *sv = SvRV(ST(1));
711 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
713 mg = mg_find(sv, PERL_MAGIC_ext);
714 mg->mg_virtual = &perlio_vtab;
716 Perl_warn(aTHX_ "attrib %" SVf, sv);
717 for (i = 2; i < items; i++) {
719 const char *name = SvPV(ST(i), len);
720 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
722 av_push(av, SvREFCNT_inc(layer));
733 #endif /* USE_ATTIBUTES_FOR_PERLIO */
736 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
738 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
739 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
743 XS(XS_PerlIO__Layer__find)
747 Perl_croak(aTHX_ "Usage class->find(name[,load])");
750 char *name = SvPV(ST(1), len);
751 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
752 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
754 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
761 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
763 if (!PL_known_layers)
764 PL_known_layers = PerlIO_list_alloc(aTHX);
765 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
766 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
770 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
773 const char *s = names;
775 while (isSPACE(*s) || *s == ':')
780 const char *as = Nullch;
782 if (!isIDFIRST(*s)) {
784 * Message is consistent with how attribute lists are
785 * passed. Even though this means "foo : : bar" is
786 * seen as an invalid separator character.
788 char q = ((*s == '\'') ? '"' : '\'');
790 "perlio: invalid separator character %c%c%c in layer specification list %s",
796 } while (isALNUM(*e));
812 * It's a nul terminated string, not allowed
813 * to \ the terminating null. Anything other
814 * character is passed over.
825 "perlio: argument list not closed for layer \"%.*s\"",
837 PerlIO_funcs *layer =
838 PerlIO_find_layer(aTHX_ s, llen, 1);
840 PerlIO_list_push(aTHX_ av, layer,
846 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
859 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
861 PerlIO_funcs *tab = &PerlIO_perlio;
862 #ifdef PERLIO_USING_CRLF
865 if (PerlIO_stdio.Set_ptrcnt)
868 PerlIO_debug("Pushing %s\n", tab->name);
869 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
874 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
876 return av->array[n].arg;
880 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
882 if (n >= 0 && n < av->cur) {
883 PerlIO_debug("Layer %" IVdf " is %s\n", n,
884 av->array[n].funcs->name);
885 return av->array[n].funcs;
888 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
893 PerlIO_default_layers(pTHX)
895 if (!PL_def_layerlist) {
896 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
897 PerlIO_funcs *osLayer = &PerlIO_unix;
898 PL_def_layerlist = PerlIO_list_alloc(aTHX);
899 PerlIO_define_layer(aTHX_ & PerlIO_unix);
900 #if defined(WIN32) && !defined(UNDER_CE)
901 PerlIO_define_layer(aTHX_ & PerlIO_win32);
903 osLayer = &PerlIO_win32;
906 PerlIO_define_layer(aTHX_ & PerlIO_raw);
907 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
908 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
909 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
911 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
913 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
914 PerlIO_define_layer(aTHX_ & PerlIO_byte);
915 PerlIO_list_push(aTHX_ PL_def_layerlist,
916 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
919 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
922 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
925 if (PL_def_layerlist->cur < 2) {
926 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
928 return PL_def_layerlist;
932 Perl_boot_core_PerlIO(pTHX)
934 #ifdef USE_ATTRIBUTES_FOR_PERLIO
935 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
938 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
942 PerlIO_default_layer(pTHX_ I32 n)
944 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
947 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
950 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
951 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
954 PerlIO_stdstreams(pTHX)
957 PerlIO_allocate(aTHX);
958 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
959 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
960 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
965 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
968 Newc('L',l,tab->size,char,PerlIOl);
970 Zero(l, tab->size, char);
974 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
975 (mode) ? mode : "(Null)", (void*)arg);
976 if ((*l->tab->Pushed) (aTHX_ f, mode, arg) != 0) {
985 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
997 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1000 * Remove the dummy layer
1002 PerlIO_pop(aTHX_ f);
1004 * Pop back to bottom layer
1008 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1009 if (*PerlIONext(f)) {
1010 PerlIO_pop(aTHX_ f);
1014 * Nothing bellow - push unix on top then remove it
1016 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1017 PerlIO_pop(aTHX_ PerlIONext(f));
1022 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1029 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1030 PerlIO_list_t *layers, IV n)
1032 IV max = layers->cur;
1035 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1037 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1048 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1052 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1053 code = PerlIO_parse_layers(aTHX_ layers, names);
1055 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1057 PerlIO_list_free(aTHX_ layers);
1063 /*--------------------------------------------------------------------------------------*/
1065 * Given the abstraction above the public API functions
1069 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1071 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1072 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1073 (names) ? names : "(Null)");
1074 /* Can't flush if switching encodings. */
1075 if (!(names && memEQ(names, ":encoding(", 10))) {
1077 #ifdef PERLIO_USING_CRLF
1078 if (!names && (mode & O_BINARY)) {
1081 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1082 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1085 top = PerlIONext(top);
1091 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1094 #undef PerlIO__close
1096 PerlIO__close(PerlIO *f)
1100 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1102 SETERRNO(EBADF, SS$_IVCHAN);
1109 PerlIO_close(PerlIO *f)
1114 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1116 PerlIO_pop(aTHX_ f);
1122 #undef PerlIO_fileno
1124 PerlIO_fileno(PerlIO *f)
1128 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1130 SETERRNO(EBADF, SS$_IVCHAN);
1136 PerlIO_context_layers(pTHX_ const char *mode)
1138 const char *type = NULL;
1140 * Need to supply default layer info from open.pm
1143 SV *layers = PL_curcop->cop_io;
1146 type = SvPV(layers, len);
1147 if (type && mode[0] != 'r') {
1149 * Skip to write part
1151 const char *s = strchr(type, 0);
1152 if (s && (s - type) < len) {
1161 static PerlIO_funcs *
1162 PerlIO_layer_from_ref(pTHX_ SV *sv)
1165 * For any scalar type load the handler which is bundled with perl
1167 if (SvTYPE(sv) < SVt_PVAV)
1168 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1171 * For other types allow if layer is known but don't try and load it
1173 switch (SvTYPE(sv)) {
1175 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1177 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1179 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1181 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1187 PerlIO_resolve_layers(pTHX_ const char *layers,
1188 const char *mode, int narg, SV **args)
1190 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1193 PerlIO_stdstreams(aTHX);
1197 * If it is a reference but not an object see if we have a handler
1200 if (SvROK(arg) && !sv_isobject(arg)) {
1201 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1203 def = PerlIO_list_alloc(aTHX);
1204 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1208 * Don't fail if handler cannot be found :Via(...) etc. may do
1209 * something sensible else we will just stringfy and open
1215 layers = PerlIO_context_layers(aTHX_ mode);
1216 if (layers && *layers) {
1220 av = PerlIO_list_alloc(aTHX);
1221 for (i = 0; i < def->cur; i++) {
1222 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1229 PerlIO_parse_layers(aTHX_ av, layers);
1240 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1241 int imode, int perm, PerlIO *f, int narg, SV **args)
1243 if (!f && narg == 1 && *args == &PL_sv_undef) {
1244 if ((f = PerlIO_tmpfile())) {
1246 layers = PerlIO_context_layers(aTHX_ mode);
1247 if (layers && *layers)
1248 PerlIO_apply_layers(aTHX_ f, mode, layers);
1252 PerlIO_list_t *layera = NULL;
1254 PerlIO_funcs *tab = NULL;
1257 * This is "reopen" - it is not tested as perl does not use it
1261 layera = PerlIO_list_alloc(aTHX);
1264 (l->tab->Getarg) ? (*l->tab->
1265 Getarg) (aTHX_ &l, NULL, 0) : &PL_sv_undef;
1266 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1267 l = *PerlIONext(&l);
1271 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1274 * Start at "top" of layer stack
1276 n = layera->cur - 1;
1278 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1287 * Found that layer 'n' can do opens - call it
1289 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1290 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1292 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1293 tab->name, layers, mode, fd, imode, perm,
1294 (void*)f, narg, (void*)args);
1295 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1298 if (n + 1 < layera->cur) {
1300 * More layers above the one that we used to open -
1303 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1310 PerlIO_list_free(aTHX_ layera);
1316 #undef PerlIO_fdopen
1318 PerlIO_fdopen(int fd, const char *mode)
1321 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1326 PerlIO_open(const char *path, const char *mode)
1329 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1330 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1333 #undef PerlIO_reopen
1335 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1338 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1339 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1344 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1348 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1350 SETERRNO(EBADF, SS$_IVCHAN);
1355 #undef PerlIO_unread
1357 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1361 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1363 SETERRNO(EBADF, SS$_IVCHAN);
1370 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1374 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1376 SETERRNO(EBADF, SS$_IVCHAN);
1383 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1387 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1389 SETERRNO(EBADF, SS$_IVCHAN);
1396 PerlIO_tell(PerlIO *f)
1400 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1402 SETERRNO(EBADF, SS$_IVCHAN);
1409 PerlIO_flush(PerlIO *f)
1414 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1415 if (tab && tab->Flush) {
1416 return (*tab->Flush) (aTHX_ f);
1419 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1420 SETERRNO(EBADF, SS$_IVCHAN);
1425 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1426 SETERRNO(EBADF, SS$_IVCHAN);
1432 * Is it good API design to do flush-all on NULL, a potentially
1433 * errorneous input? Maybe some magical value (PerlIO*
1434 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1435 * things on fflush(NULL), but should we be bound by their design
1438 PerlIO **table = &PL_perlio;
1440 while ((f = *table)) {
1442 table = (PerlIO **) (f++);
1443 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1444 if (*f && PerlIO_flush(f) != 0)
1454 PerlIOBase_flush_linebuf(pTHX)
1456 PerlIO **table = &PL_perlio;
1458 while ((f = *table)) {
1460 table = (PerlIO **) (f++);
1461 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1464 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1465 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1474 PerlIO_fill(PerlIO *f)
1478 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1480 SETERRNO(EBADF, SS$_IVCHAN);
1485 #undef PerlIO_isutf8
1487 PerlIO_isutf8(PerlIO *f)
1490 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1492 SETERRNO(EBADF, SS$_IVCHAN);
1499 PerlIO_eof(PerlIO *f)
1503 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1505 SETERRNO(EBADF, SS$_IVCHAN);
1512 PerlIO_error(PerlIO *f)
1516 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1518 SETERRNO(EBADF, SS$_IVCHAN);
1523 #undef PerlIO_clearerr
1525 PerlIO_clearerr(PerlIO *f)
1529 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1531 SETERRNO(EBADF, SS$_IVCHAN);
1534 #undef PerlIO_setlinebuf
1536 PerlIO_setlinebuf(PerlIO *f)
1540 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1542 SETERRNO(EBADF, SS$_IVCHAN);
1545 #undef PerlIO_has_base
1547 PerlIO_has_base(PerlIO *f)
1550 return (PerlIOBase(f)->tab->Get_base != NULL);
1555 #undef PerlIO_fast_gets
1557 PerlIO_fast_gets(PerlIO *f)
1559 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1560 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1561 return (tab->Set_ptrcnt != NULL);
1566 #undef PerlIO_has_cntptr
1568 PerlIO_has_cntptr(PerlIO *f)
1571 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1572 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1577 #undef PerlIO_canset_cnt
1579 PerlIO_canset_cnt(PerlIO *f)
1582 PerlIOl *l = PerlIOBase(f);
1583 return (l->tab->Set_ptrcnt != NULL);
1588 #undef PerlIO_get_base
1590 PerlIO_get_base(PerlIO *f)
1594 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1598 #undef PerlIO_get_bufsiz
1600 PerlIO_get_bufsiz(PerlIO *f)
1604 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1608 #undef PerlIO_get_ptr
1610 PerlIO_get_ptr(PerlIO *f)
1613 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1614 if (tab->Get_ptr == NULL)
1616 return (*tab->Get_ptr) (aTHX_ f);
1619 #undef PerlIO_get_cnt
1621 PerlIO_get_cnt(PerlIO *f)
1624 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1625 if (tab->Get_cnt == NULL)
1627 return (*tab->Get_cnt) (aTHX_ f);
1630 #undef PerlIO_set_cnt
1632 PerlIO_set_cnt(PerlIO *f, int cnt)
1635 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1638 #undef PerlIO_set_ptrcnt
1640 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1643 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1644 if (tab->Set_ptrcnt == NULL) {
1645 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1647 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1650 /*--------------------------------------------------------------------------------------*/
1652 * utf8 and raw dummy layers
1656 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1658 if (PerlIONext(f)) {
1659 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1660 PerlIO_pop(aTHX_ f);
1661 if (tab->kind & PERLIO_K_UTF8)
1662 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1664 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1670 PerlIO_funcs PerlIO_utf8 = {
1673 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1691 NULL, /* get_base */
1692 NULL, /* get_bufsiz */
1695 NULL, /* set_ptrcnt */
1698 PerlIO_funcs PerlIO_byte = {
1719 NULL, /* get_base */
1720 NULL, /* get_bufsiz */
1723 NULL, /* set_ptrcnt */
1727 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1728 IV n, const char *mode, int fd, int imode, int perm,
1729 PerlIO *old, int narg, SV **args)
1731 PerlIO_funcs *tab = PerlIO_default_btm();
1732 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1736 PerlIO_funcs PerlIO_raw = {
1757 NULL, /* get_base */
1758 NULL, /* get_bufsiz */
1761 NULL, /* set_ptrcnt */
1763 /*--------------------------------------------------------------------------------------*/
1764 /*--------------------------------------------------------------------------------------*/
1766 * "Methods" of the "base class"
1770 PerlIOBase_fileno(pTHX_ PerlIO *f)
1772 return PerlIO_fileno(PerlIONext(f));
1776 PerlIO_modestr(PerlIO *f, char *buf)
1779 IV flags = PerlIOBase(f)->flags;
1780 if (flags & PERLIO_F_APPEND) {
1782 if (flags & PERLIO_F_CANREAD) {
1786 else if (flags & PERLIO_F_CANREAD) {
1788 if (flags & PERLIO_F_CANWRITE)
1791 else if (flags & PERLIO_F_CANWRITE) {
1793 if (flags & PERLIO_F_CANREAD) {
1797 #ifdef PERLIO_USING_CRLF
1798 if (!(flags & PERLIO_F_CRLF))
1806 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1808 PerlIOl *l = PerlIOBase(f);
1810 const char *omode = mode;
1813 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1814 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1815 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1816 if (tab->Set_ptrcnt != NULL)
1817 l->flags |= PERLIO_F_FASTGETS;
1819 if (*mode == '#' || *mode == 'I')
1823 l->flags |= PERLIO_F_CANREAD;
1826 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1829 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1832 SETERRNO(EINVAL, LIB$_INVARG);
1838 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1841 l->flags &= ~PERLIO_F_CRLF;
1844 l->flags |= PERLIO_F_CRLF;
1847 SETERRNO(EINVAL, LIB$_INVARG);
1854 l->flags |= l->next->flags &
1855 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1860 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1861 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1862 l->flags, PerlIO_modestr(f, temp));
1868 PerlIOBase_popped(pTHX_ PerlIO *f)
1874 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1877 * Save the position as current head considers it
1879 Off_t old = PerlIO_tell(f);
1881 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1882 PerlIOSelf(f, PerlIOBuf)->posn = old;
1883 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1888 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1890 STDCHAR *buf = (STDCHAR *) vbuf;
1892 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1895 SSize_t avail = PerlIO_get_cnt(f);
1898 take = (count < avail) ? count : avail;
1900 STDCHAR *ptr = PerlIO_get_ptr(f);
1901 Copy(ptr, buf, take, STDCHAR);
1902 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1906 if (count > 0 && avail <= 0) {
1907 if (PerlIO_fill(f) != 0)
1911 return (buf - (STDCHAR *) vbuf);
1917 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1923 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1929 PerlIOBase_close(pTHX_ PerlIO *f)
1932 PerlIO *n = PerlIONext(f);
1933 if (PerlIO_flush(f) != 0)
1935 if (n && *n && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1937 PerlIOBase(f)->flags &=
1938 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1943 PerlIOBase_eof(pTHX_ PerlIO *f)
1946 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1952 PerlIOBase_error(pTHX_ PerlIO *f)
1955 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1961 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1964 PerlIO *n = PerlIONext(f);
1965 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1972 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
1975 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1980 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1986 return sv_dup(arg, param);
1989 return newSVsv(arg);
1992 return newSVsv(arg);
1997 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1999 PerlIO *nexto = PerlIONext(o);
2001 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2002 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2005 PerlIO_funcs *self = PerlIOBase(o)->tab;
2008 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2009 self->name, (void*)f, (void*)o, (void*)param);
2011 arg = (*self->Getarg)(aTHX_ o,param,flags);
2013 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2021 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2023 perl_mutex PerlIO_mutex;
2025 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2030 /* Place holder for stdstreams call ??? */
2032 MUTEX_INIT(&PerlIO_mutex);
2037 PerlIOUnix_refcnt_inc(int fd)
2039 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2041 MUTEX_LOCK(&PerlIO_mutex);
2043 PerlIO_fd_refcnt[fd]++;
2044 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2046 MUTEX_UNLOCK(&PerlIO_mutex);
2052 PerlIOUnix_refcnt_dec(int fd)
2055 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2057 MUTEX_LOCK(&PerlIO_mutex);
2059 cnt = --PerlIO_fd_refcnt[fd];
2060 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2062 MUTEX_UNLOCK(&PerlIO_mutex);
2069 PerlIO_cleanup(pTHX)
2073 PerlIO_debug("Cleanup %p\n",aTHX);
2075 /* Raise STDIN..STDERR refcount so we don't close them */
2076 for (i=0; i < 3; i++)
2077 PerlIOUnix_refcnt_inc(i);
2078 PerlIO_cleantable(aTHX_ &PL_perlio);
2079 /* Restore STDIN..STDERR refcount */
2080 for (i=0; i < 3; i++)
2081 PerlIOUnix_refcnt_dec(i);
2086 /*--------------------------------------------------------------------------------------*/
2088 * Bottom-most level for UNIX-like case
2092 struct _PerlIO base; /* The generic part */
2093 int fd; /* UNIX like file descriptor */
2094 int oflags; /* open/fcntl flags */
2098 PerlIOUnix_oflags(const char *mode)
2101 if (*mode == 'I' || *mode == '#')
2106 if (*++mode == '+') {
2113 oflags = O_CREAT | O_TRUNC;
2114 if (*++mode == '+') {
2123 oflags = O_CREAT | O_APPEND;
2124 if (*++mode == '+') {
2137 else if (*mode == 't') {
2139 oflags &= ~O_BINARY;
2143 * Always open in binary mode
2146 if (*mode || oflags == -1) {
2147 SETERRNO(EINVAL, LIB$_INVARG);
2154 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2156 return PerlIOSelf(f, PerlIOUnix)->fd;
2160 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2162 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2163 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2164 if (*PerlIONext(f)) {
2165 s->fd = PerlIO_fileno(PerlIONext(f));
2167 * XXX could (or should) we retrieve the oflags from the open file
2168 * handle rather than believing the "mode" we are passed in? XXX
2169 * Should the value on NULL mode be 0 or -1?
2171 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2173 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2178 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2179 IV n, const char *mode, int fd, int imode,
2180 int perm, PerlIO *f, int narg, SV **args)
2183 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2184 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2187 char *path = SvPV_nolen(*args);
2191 imode = PerlIOUnix_oflags(mode);
2195 fd = PerlLIO_open3(path, imode, perm);
2203 f = PerlIO_allocate(aTHX);
2204 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2208 s = PerlIOSelf(f, PerlIOUnix);
2211 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2212 PerlIOUnix_refcnt_inc(fd);
2218 * FIXME: pop layers ???
2226 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2228 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2230 if (flags & PERLIO_DUP_FD) {
2231 fd = PerlLIO_dup(fd);
2233 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2234 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2236 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2237 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2239 PerlIOUnix_refcnt_inc(fd);
2248 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2250 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2251 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2254 SSize_t len = PerlLIO_read(fd, vbuf, count);
2255 if (len >= 0 || errno != EINTR) {
2257 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2258 else if (len == 0 && count != 0)
2259 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2267 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2269 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2271 SSize_t len = PerlLIO_write(fd, vbuf, count);
2272 if (len >= 0 || errno != EINTR) {
2274 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2282 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2285 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2286 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2287 return (new == (Off_t) - 1) ? -1 : 0;
2291 PerlIOUnix_tell(pTHX_ PerlIO *f)
2293 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2298 PerlIOUnix_close(pTHX_ PerlIO *f)
2300 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2302 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2303 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2304 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2309 SETERRNO(EBADF,SS$_IVCHAN);
2312 while (PerlLIO_close(fd) != 0) {
2313 if (errno != EINTR) {
2320 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2325 PerlIO_funcs PerlIO_unix = {
2341 PerlIOBase_noop_ok, /* flush */
2342 PerlIOBase_noop_fail, /* fill */
2345 PerlIOBase_clearerr,
2346 PerlIOBase_setlinebuf,
2347 NULL, /* get_base */
2348 NULL, /* get_bufsiz */
2351 NULL, /* set_ptrcnt */
2354 /*--------------------------------------------------------------------------------------*/
2360 struct _PerlIO base;
2361 FILE *stdio; /* The stream */
2365 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2367 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2371 PerlIOStdio_mode(const char *mode, char *tmode)
2377 #ifdef PERLIO_USING_CRLF
2385 * This isn't used yet ...
2388 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2390 if (*PerlIONext(f)) {
2391 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2394 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2395 PerlIOStdio_mode(mode, tmode));
2401 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2404 #undef PerlIO_importFILE
2406 PerlIO_importFILE(FILE *stdio, int fl)
2412 PerlIOSelf(PerlIO_push
2413 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2414 "r+", Nullsv), PerlIOStdio);
2421 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2422 IV n, const char *mode, int fd, int imode,
2423 int perm, PerlIO *f, int narg, SV **args)
2427 char *path = SvPV_nolen(*args);
2428 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2430 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2431 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2436 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2441 char *path = SvPV_nolen(*args);
2444 fd = PerlLIO_open3(path, imode, perm);
2447 FILE *stdio = PerlSIO_fopen(path, mode);
2450 PerlIOSelf(PerlIO_push
2451 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2452 (mode = PerlIOStdio_mode(mode, tmode)),
2456 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2471 stdio = PerlSIO_stdin;
2474 stdio = PerlSIO_stdout;
2477 stdio = PerlSIO_stderr;
2482 stdio = PerlSIO_fdopen(fd, mode =
2483 PerlIOStdio_mode(mode, tmode));
2487 PerlIOSelf(PerlIO_push
2488 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2489 mode, PerlIOArg), PerlIOStdio);
2491 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2500 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2502 /* This assumes no layers underneath - which is what
2503 happens, but is not how I remember it. NI-S 2001/10/16
2505 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2506 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2507 if (flags & PERLIO_DUP_FD) {
2508 int fd = PerlLIO_dup(fileno(stdio));
2511 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2514 /* FIXME: To avoid messy error recovery if dup fails
2515 re-use the existing stdio as though flag was not set
2519 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2520 PerlIOUnix_refcnt_inc(fileno(stdio));
2526 PerlIOStdio_close(pTHX_ PerlIO *f)
2528 #ifdef SOCKS5_VERSION_NAME
2530 Sock_size_t optlen = sizeof(int);
2532 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2533 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2534 /* Do not close it but do flush any buffers */
2539 #ifdef SOCKS5_VERSION_NAME
2541 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2543 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2545 PerlSIO_fclose(stdio)
2554 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2556 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2559 STDCHAR *buf = (STDCHAR *) vbuf;
2561 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2562 * stdio does not do that for fread()
2564 int ch = PerlSIO_fgetc(s);
2571 got = PerlSIO_fread(vbuf, 1, count, s);
2576 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2578 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2579 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2582 int ch = *buf-- & 0xff;
2583 if (PerlSIO_ungetc(ch, s) != ch)
2592 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2594 return PerlSIO_fwrite(vbuf, 1, count,
2595 PerlIOSelf(f, PerlIOStdio)->stdio);
2599 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2601 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2602 return PerlSIO_fseek(stdio, offset, whence);
2606 PerlIOStdio_tell(pTHX_ PerlIO *f)
2608 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2609 return PerlSIO_ftell(stdio);
2613 PerlIOStdio_flush(pTHX_ PerlIO *f)
2615 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2616 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2617 return PerlSIO_fflush(stdio);
2622 * FIXME: This discards ungetc() and pre-read stuff which is not
2623 * right if this is just a "sync" from a layer above Suspect right
2624 * design is to do _this_ but not have layer above flush this
2625 * layer read-to-read
2628 * Not writeable - sync by attempting a seek
2631 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2639 PerlIOStdio_fill(pTHX_ PerlIO *f)
2641 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2644 * fflush()ing read-only streams can cause trouble on some stdio-s
2646 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2647 if (PerlSIO_fflush(stdio) != 0)
2650 c = PerlSIO_fgetc(stdio);
2651 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2657 PerlIOStdio_eof(pTHX_ PerlIO *f)
2659 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2663 PerlIOStdio_error(pTHX_ PerlIO *f)
2665 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2669 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2671 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2675 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2677 #ifdef HAS_SETLINEBUF
2678 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2680 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2686 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2688 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2689 return (STDCHAR*)PerlSIO_get_base(stdio);
2693 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2695 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2696 return PerlSIO_get_bufsiz(stdio);
2700 #ifdef USE_STDIO_PTR
2702 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2704 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2705 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2709 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2711 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2712 return PerlSIO_get_cnt(stdio);
2716 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2718 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2720 #ifdef STDIO_PTR_LVALUE
2721 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2722 #ifdef STDIO_PTR_LVAL_SETS_CNT
2723 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2725 assert(PerlSIO_get_cnt(stdio) == (cnt));
2728 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2730 * Setting ptr _does_ change cnt - we are done
2734 #else /* STDIO_PTR_LVALUE */
2736 #endif /* STDIO_PTR_LVALUE */
2739 * Now (or only) set cnt
2741 #ifdef STDIO_CNT_LVALUE
2742 PerlSIO_set_cnt(stdio, cnt);
2743 #else /* STDIO_CNT_LVALUE */
2744 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2745 PerlSIO_set_ptr(stdio,
2746 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2748 #else /* STDIO_PTR_LVAL_SETS_CNT */
2750 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2751 #endif /* STDIO_CNT_LVALUE */
2756 PerlIO_funcs PerlIO_stdio = {
2758 sizeof(PerlIOStdio),
2776 PerlIOStdio_clearerr,
2777 PerlIOStdio_setlinebuf,
2779 PerlIOStdio_get_base,
2780 PerlIOStdio_get_bufsiz,
2785 #ifdef USE_STDIO_PTR
2786 PerlIOStdio_get_ptr,
2787 PerlIOStdio_get_cnt,
2788 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2789 PerlIOStdio_set_ptrcnt
2790 #else /* STDIO_PTR_LVALUE */
2792 #endif /* STDIO_PTR_LVALUE */
2793 #else /* USE_STDIO_PTR */
2797 #endif /* USE_STDIO_PTR */
2800 #undef PerlIO_exportFILE
2802 PerlIO_exportFILE(PerlIO *f, int fl)
2806 stdio = fdopen(PerlIO_fileno(f), "r+");
2810 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2817 #undef PerlIO_findFILE
2819 PerlIO_findFILE(PerlIO *f)
2823 if (l->tab == &PerlIO_stdio) {
2824 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2827 l = *PerlIONext(&l);
2829 return PerlIO_exportFILE(f, 0);
2832 #undef PerlIO_releaseFILE
2834 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2838 /*--------------------------------------------------------------------------------------*/
2840 * perlio buffer layer
2844 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2846 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2847 int fd = PerlIO_fileno(f);
2849 if (fd >= 0 && PerlLIO_isatty(fd)) {
2850 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2852 posn = PerlIO_tell(PerlIONext(f));
2853 if (posn != (Off_t) - 1) {
2856 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2860 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2861 IV n, const char *mode, int fd, int imode, int perm,
2862 PerlIO *f, int narg, SV **args)
2865 PerlIO *next = PerlIONext(f);
2867 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2869 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2872 || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
2878 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2886 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2889 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2891 * if push fails during open, open fails. close will pop us.
2896 fd = PerlIO_fileno(f);
2897 #ifdef PERLIO_USING_CRLF
2899 * do something about failing setmode()? --jhi
2901 PerlLIO_setmode(fd, O_BINARY);
2903 if (init && fd == 2) {
2905 * Initial stderr is unbuffered
2907 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2916 * This "flush" is akin to sfio's sync in that it handles files in either
2917 * read or write state
2920 PerlIOBuf_flush(pTHX_ PerlIO *f)
2922 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2924 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2926 * write() the buffer
2928 STDCHAR *buf = b->buf;
2930 PerlIO *n = PerlIONext(f);
2931 while (p < b->ptr) {
2932 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2936 else if (count < 0 || PerlIO_error(n)) {
2937 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2942 b->posn += (p - buf);
2944 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2945 STDCHAR *buf = PerlIO_get_base(f);
2947 * Note position change
2949 b->posn += (b->ptr - buf);
2950 if (b->ptr < b->end) {
2952 * We did not consume all of it
2954 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2955 b->posn = PerlIO_tell(PerlIONext(f));
2959 b->ptr = b->end = b->buf;
2960 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2962 * FIXME: Is this right for read case ?
2964 if (PerlIO_flush(PerlIONext(f)) != 0)
2970 PerlIOBuf_fill(pTHX_ PerlIO *f)
2972 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2973 PerlIO *n = PerlIONext(f);
2976 * FIXME: doing the down-stream flush is a bad idea if it causes
2977 * pre-read data in stdio buffer to be discarded but this is too
2978 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2979 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2981 if (PerlIO_flush(f) != 0)
2983 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2984 PerlIOBase_flush_linebuf(aTHX);
2987 PerlIO_get_base(f); /* allocate via vtable */
2989 b->ptr = b->end = b->buf;
2990 if (PerlIO_fast_gets(n)) {
2992 * Layer below is also buffered We do _NOT_ want to call its
2993 * ->Read() because that will loop till it gets what we asked for
2994 * which may hang on a pipe etc. Instead take anything it has to
2995 * hand, or ask it to fill _once_.
2997 avail = PerlIO_get_cnt(n);
2999 avail = PerlIO_fill(n);
3001 avail = PerlIO_get_cnt(n);
3003 if (!PerlIO_error(n) && PerlIO_eof(n))
3008 STDCHAR *ptr = PerlIO_get_ptr(n);
3009 SSize_t cnt = avail;
3010 if (avail > b->bufsiz)
3012 Copy(ptr, b->buf, avail, STDCHAR);
3013 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3017 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3021 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3023 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3026 b->end = b->buf + avail;
3027 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3032 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3038 return PerlIOBase_read(aTHX_ f, vbuf, count);
3044 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3046 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3047 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3050 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3055 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3057 * Buffer is already a read buffer, we can overwrite any chars
3058 * which have been read back to buffer start
3060 avail = (b->ptr - b->buf);
3064 * Buffer is idle, set it up so whole buffer is available for
3068 b->end = b->buf + avail;
3070 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3072 * Buffer extends _back_ from where we are now
3074 b->posn -= b->bufsiz;
3076 if (avail > (SSize_t) count) {
3078 * If we have space for more than count, just move count
3086 * In simple stdio-like ungetc() case chars will be already
3089 if (buf != b->ptr) {
3090 Copy(buf, b->ptr, avail, STDCHAR);
3094 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3101 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3103 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3104 const STDCHAR *buf = (const STDCHAR *) vbuf;
3108 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3111 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3112 if ((SSize_t) count < avail)
3114 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3115 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3130 Copy(buf, b->ptr, avail, STDCHAR);
3137 if (b->ptr >= (b->buf + b->bufsiz))
3140 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3146 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3149 if ((code = PerlIO_flush(f)) == 0) {
3150 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3151 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3152 code = PerlIO_seek(PerlIONext(f), offset, whence);
3154 b->posn = PerlIO_tell(PerlIONext(f));
3161 PerlIOBuf_tell(pTHX_ PerlIO *f)
3163 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3165 * b->posn is file position where b->buf was read, or will be written
3167 Off_t posn = b->posn;
3170 * If buffer is valid adjust position by amount in buffer
3172 posn += (b->ptr - b->buf);
3178 PerlIOBuf_close(pTHX_ PerlIO *f)
3180 IV code = PerlIOBase_close(aTHX_ f);
3181 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3182 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3186 b->ptr = b->end = b->buf;
3187 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3192 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3194 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3201 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3203 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3206 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3207 return (b->end - b->ptr);
3212 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3214 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3219 Newz('B',b->buf,b->bufsiz, STDCHAR);
3221 b->buf = (STDCHAR *) & b->oneword;
3222 b->bufsiz = sizeof(b->oneword);
3231 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3233 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3236 return (b->end - b->buf);
3240 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3242 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3246 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3248 assert(PerlIO_get_cnt(f) == cnt);
3249 assert(b->ptr >= b->buf);
3251 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3255 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3257 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3262 PerlIO_funcs PerlIO_perlio = {
3282 PerlIOBase_clearerr,
3283 PerlIOBase_setlinebuf,
3288 PerlIOBuf_set_ptrcnt,
3291 /*--------------------------------------------------------------------------------------*/
3293 * Temp layer to hold unread chars when cannot do it any other way
3297 PerlIOPending_fill(pTHX_ PerlIO *f)
3300 * Should never happen
3307 PerlIOPending_close(pTHX_ PerlIO *f)
3310 * A tad tricky - flush pops us, then we close new top
3313 return PerlIO_close(f);
3317 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3320 * A tad tricky - flush pops us, then we seek new top
3323 return PerlIO_seek(f, offset, whence);
3328 PerlIOPending_flush(pTHX_ PerlIO *f)
3330 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3331 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3335 PerlIO_pop(aTHX_ f);
3340 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3346 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3351 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3353 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3354 PerlIOl *l = PerlIOBase(f);
3356 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3357 * etc. get muddled when it changes mid-string when we auto-pop.
3359 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3360 (PerlIOBase(PerlIONext(f))->
3361 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3366 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3368 SSize_t avail = PerlIO_get_cnt(f);
3373 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3374 if (got >= 0 && got < count) {
3376 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3377 if (more >= 0 || got == 0)
3383 PerlIO_funcs PerlIO_pending = {
3387 PerlIOPending_pushed,
3398 PerlIOPending_close,
3399 PerlIOPending_flush,
3403 PerlIOBase_clearerr,
3404 PerlIOBase_setlinebuf,
3409 PerlIOPending_set_ptrcnt,
3414 /*--------------------------------------------------------------------------------------*/
3416 * crlf - translation On read translate CR,LF to "\n" we do this by
3417 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3418 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3422 PerlIOBuf base; /* PerlIOBuf stuff */
3423 STDCHAR *nl; /* Position of crlf we "lied" about in the
3428 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3431 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3432 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3434 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3435 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3436 PerlIOBase(f)->flags);
3443 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3445 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3450 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3451 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3453 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3454 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3456 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3461 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3462 b->end = b->ptr = b->buf + b->bufsiz;
3463 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3464 b->posn -= b->bufsiz;
3466 while (count > 0 && b->ptr > b->buf) {
3469 if (b->ptr - 2 >= b->buf) {
3492 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3494 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3497 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3498 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3499 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3500 STDCHAR *nl = b->ptr;
3502 while (nl < b->end && *nl != 0xd)
3504 if (nl < b->end && *nl == 0xd) {
3506 if (nl + 1 < b->end) {
3513 * Not CR,LF but just CR
3521 * Blast - found CR as last char in buffer
3525 * They may not care, defer work as long as
3528 return (nl - b->ptr);
3532 b->ptr++; /* say we have read it as far as
3533 * flush() is concerned */
3534 b->buf++; /* Leave space in front of buffer */
3535 b->bufsiz--; /* Buffer is thus smaller */
3536 code = PerlIO_fill(f); /* Fetch some more */
3537 b->bufsiz++; /* Restore size for next time */
3538 b->buf--; /* Point at space */
3539 b->ptr = nl = b->buf; /* Which is what we hand
3541 b->posn--; /* Buffer starts here */
3542 *nl = 0xd; /* Fill in the CR */
3544 goto test; /* fill() call worked */
3546 * CR at EOF - just fall through
3552 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3558 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3560 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3561 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3562 IV flags = PerlIOBase(f)->flags;
3570 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3577 * Test code - delete when it works ...
3584 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3591 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3592 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3599 * They have taken what we lied about
3607 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3611 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3613 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3614 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3616 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3617 const STDCHAR *buf = (const STDCHAR *) vbuf;
3618 const STDCHAR *ebuf = buf + count;
3621 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3623 while (buf < ebuf) {
3624 STDCHAR *eptr = b->buf + b->bufsiz;
3625 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3626 while (buf < ebuf && b->ptr < eptr) {
3628 if ((b->ptr + 2) > eptr) {
3636 *(b->ptr)++ = 0xd; /* CR */
3637 *(b->ptr)++ = 0xa; /* LF */
3639 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3649 if (b->ptr >= eptr) {
3655 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3657 return (buf - (STDCHAR *) vbuf);
3662 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3664 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3669 return PerlIOBuf_flush(aTHX_ f);
3672 PerlIO_funcs PerlIO_crlf = {
3675 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3677 PerlIOBase_noop_ok, /* popped */
3682 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3684 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3685 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3693 PerlIOBase_clearerr,
3694 PerlIOBase_setlinebuf,
3699 PerlIOCrlf_set_ptrcnt,
3703 /*--------------------------------------------------------------------------------------*/
3705 * mmap as "buffer" layer
3709 PerlIOBuf base; /* PerlIOBuf stuff */
3710 Mmap_t mptr; /* Mapped address */
3711 Size_t len; /* mapped length */
3712 STDCHAR *bbuf; /* malloced buffer if map fails */
3715 static size_t page_size = 0;
3718 PerlIOMmap_map(pTHX_ PerlIO *f)
3720 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3721 IV flags = PerlIOBase(f)->flags;
3725 if (flags & PERLIO_F_CANREAD) {
3726 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3727 int fd = PerlIO_fileno(f);
3729 code = Fstat(fd, &st);
3730 if (code == 0 && S_ISREG(st.st_mode)) {
3731 SSize_t len = st.st_size - b->posn;
3735 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3737 SETERRNO(0, SS$_NORMAL);
3738 # ifdef _SC_PAGESIZE
3739 page_size = sysconf(_SC_PAGESIZE);
3741 page_size = sysconf(_SC_PAGE_SIZE);
3743 if ((long) page_size < 0) {
3748 (void) SvUPGRADE(error, SVt_PV);
3749 msg = SvPVx(error, n_a);
3750 Perl_croak(aTHX_ "panic: sysconf: %s",
3755 "panic: sysconf: pagesize unknown");
3759 # ifdef HAS_GETPAGESIZE
3760 page_size = getpagesize();
3762 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3763 page_size = PAGESIZE; /* compiletime, bad */
3767 if ((IV) page_size <= 0)
3768 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3773 * This is a hack - should never happen - open should
3776 b->posn = PerlIO_tell(PerlIONext(f));
3778 posn = (b->posn / page_size) * page_size;
3779 len = st.st_size - posn;
3780 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3781 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3782 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3783 madvise(m->mptr, len, MADV_SEQUENTIAL);
3785 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3786 madvise(m->mptr, len, MADV_WILLNEED);
3788 PerlIOBase(f)->flags =
3789 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3790 b->end = ((STDCHAR *) m->mptr) + len;
3791 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3800 PerlIOBase(f)->flags =
3801 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3803 b->ptr = b->end = b->ptr;
3812 PerlIOMmap_unmap(PerlIO *f)
3814 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3815 PerlIOBuf *b = &m->base;
3819 code = munmap(m->mptr, m->len);
3823 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3826 b->ptr = b->end = b->buf;
3827 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3833 PerlIOMmap_get_base(pTHX_ PerlIO *f)
3835 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3836 PerlIOBuf *b = &m->base;
3837 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3839 * Already have a readbuffer in progress
3845 * We have a write buffer or flushed PerlIOBuf read buffer
3847 m->bbuf = b->buf; /* save it in case we need it again */
3848 b->buf = NULL; /* Clear to trigger below */
3851 PerlIOMmap_map(aTHX_ f); /* Try and map it */
3854 * Map did not work - recover PerlIOBuf buffer if we have one
3859 b->ptr = b->end = b->buf;
3862 return PerlIOBuf_get_base(aTHX_ f);
3866 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3868 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3869 PerlIOBuf *b = &m->base;
3870 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3872 if (b->ptr && (b->ptr - count) >= b->buf
3873 && memEQ(b->ptr - count, vbuf, count)) {
3875 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3880 * Loose the unwritable mapped buffer
3884 * If flush took the "buffer" see if we have one from before
3886 if (!b->buf && m->bbuf)
3889 PerlIOBuf_get_base(aTHX_ f);
3893 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3897 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3899 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3900 PerlIOBuf *b = &m->base;
3901 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3903 * No, or wrong sort of, buffer
3906 if (PerlIOMmap_unmap(f) != 0)
3910 * If unmap took the "buffer" see if we have one from before
3912 if (!b->buf && m->bbuf)
3915 PerlIOBuf_get_base(aTHX_ f);
3919 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3923 PerlIOMmap_flush(pTHX_ PerlIO *f)
3925 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3926 PerlIOBuf *b = &m->base;
3927 IV code = PerlIOBuf_flush(aTHX_ f);
3929 * Now we are "synced" at PerlIOBuf level
3936 if (PerlIOMmap_unmap(f) != 0)
3941 * We seem to have a PerlIOBuf buffer which was not mapped
3942 * remember it in case we need one later
3951 PerlIOMmap_fill(pTHX_ PerlIO *f)
3953 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3954 IV code = PerlIO_flush(f);
3955 if (code == 0 && !b->buf) {
3956 code = PerlIOMmap_map(aTHX_ f);
3958 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3959 code = PerlIOBuf_fill(aTHX_ f);
3965 PerlIOMmap_close(pTHX_ PerlIO *f)
3967 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3968 PerlIOBuf *b = &m->base;
3969 IV code = PerlIO_flush(f);
3973 b->ptr = b->end = b->buf;
3975 if (PerlIOBuf_close(aTHX_ f) != 0)
3981 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3983 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3987 PerlIO_funcs PerlIO_mmap = {
4007 PerlIOBase_clearerr,
4008 PerlIOBase_setlinebuf,
4009 PerlIOMmap_get_base,
4013 PerlIOBuf_set_ptrcnt,
4016 #endif /* HAS_MMAP */
4024 PerlIO_stdstreams(aTHX);
4026 return &PL_perlio[1];
4029 #undef PerlIO_stdout
4035 PerlIO_stdstreams(aTHX);
4037 return &PL_perlio[2];
4040 #undef PerlIO_stderr
4046 PerlIO_stdstreams(aTHX);
4048 return &PL_perlio[3];
4051 /*--------------------------------------------------------------------------------------*/
4053 #undef PerlIO_getname
4055 PerlIO_getname(PerlIO *f, char *buf)
4060 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4062 name = fgetname(stdio, buf);
4064 Perl_croak(aTHX_ "Don't know how to get file name");
4070 /*--------------------------------------------------------------------------------------*/
4072 * Functions which can be called on any kind of PerlIO implemented in
4078 PerlIO_getc(PerlIO *f)
4081 SSize_t count = PerlIO_read(f, buf, 1);
4083 return (unsigned char) buf[0];
4088 #undef PerlIO_ungetc
4090 PerlIO_ungetc(PerlIO *f, int ch)
4094 if (PerlIO_unread(f, &buf, 1) == 1)
4102 PerlIO_putc(PerlIO *f, int ch)
4105 return PerlIO_write(f, &buf, 1);
4110 PerlIO_puts(PerlIO *f, const char *s)
4112 STRLEN len = strlen(s);
4113 return PerlIO_write(f, s, len);
4116 #undef PerlIO_rewind
4118 PerlIO_rewind(PerlIO *f)
4120 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4124 #undef PerlIO_vprintf
4126 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4129 SV *sv = newSVpvn("", 0);
4135 Perl_va_copy(ap, apc);
4136 sv_vcatpvf(sv, fmt, &apc);
4138 sv_vcatpvf(sv, fmt, &ap);
4141 wrote = PerlIO_write(f, s, len);
4146 #undef PerlIO_printf
4148 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4153 result = PerlIO_vprintf(f, fmt, ap);
4158 #undef PerlIO_stdoutf
4160 PerlIO_stdoutf(const char *fmt, ...)
4165 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4170 #undef PerlIO_tmpfile
4172 PerlIO_tmpfile(void)
4175 * I have no idea how portable mkstemp() is ...
4177 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4180 FILE *stdio = PerlSIO_tmpfile();
4183 PerlIOSelf(PerlIO_push
4184 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4185 "w+", Nullsv), PerlIOStdio);
4191 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4192 int fd = mkstemp(SvPVX(sv));
4195 f = PerlIO_fdopen(fd, "w+");
4197 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4199 PerlLIO_unlink(SvPVX(sv));
4209 #endif /* USE_SFIO */
4210 #endif /* PERLIO_IS_STDIO */
4212 /*======================================================================================*/
4214 * Now some functions in terms of above which may be needed even if we are
4215 * not in true PerlIO mode
4219 #undef PerlIO_setpos
4221 PerlIO_setpos(PerlIO *f, SV *pos)
4226 Off_t *posn = (Off_t *) SvPV(pos, len);
4227 if (f && len == sizeof(Off_t))
4228 return PerlIO_seek(f, *posn, SEEK_SET);
4230 SETERRNO(EINVAL, SS$_IVCHAN);
4234 #undef PerlIO_setpos
4236 PerlIO_setpos(PerlIO *f, SV *pos)
4241 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4242 if (f && len == sizeof(Fpos_t)) {
4243 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4244 return fsetpos64(f, fpos);
4246 return fsetpos(f, fpos);
4250 SETERRNO(EINVAL, SS$_IVCHAN);
4256 #undef PerlIO_getpos
4258 PerlIO_getpos(PerlIO *f, SV *pos)
4261 Off_t posn = PerlIO_tell(f);
4262 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4263 return (posn == (Off_t) - 1) ? -1 : 0;
4266 #undef PerlIO_getpos
4268 PerlIO_getpos(PerlIO *f, SV *pos)
4273 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4274 code = fgetpos64(f, &fpos);
4276 code = fgetpos(f, &fpos);
4278 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4283 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4286 vprintf(char *pat, char *args)
4288 _doprnt(pat, args, stdout);
4289 return 0; /* wrong, but perl doesn't use the return
4294 vfprintf(FILE *fd, char *pat, char *args)
4296 _doprnt(pat, args, fd);
4297 return 0; /* wrong, but perl doesn't use the return
4303 #ifndef PerlIO_vsprintf
4305 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4307 int val = vsprintf(s, fmt, ap);
4309 if (strlen(s) >= (STRLEN) n) {
4311 (void) PerlIO_puts(Perl_error_log,
4312 "panic: sprintf overflow - memory corrupted!\n");
4320 #ifndef PerlIO_sprintf
4322 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4327 result = PerlIO_vsprintf(s, n, fmt, ap);