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;
1095 PerlIO__close(pTHX_ PerlIO *f)
1098 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1100 SETERRNO(EBADF, SS$_IVCHAN);
1106 Perl_PerlIO_close(pTHX_ PerlIO *f)
1110 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1112 PerlIO_pop(aTHX_ f);
1119 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1122 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1124 SETERRNO(EBADF, SS$_IVCHAN);
1130 PerlIO_context_layers(pTHX_ const char *mode)
1132 const char *type = NULL;
1134 * Need to supply default layer info from open.pm
1137 SV *layers = PL_curcop->cop_io;
1140 type = SvPV(layers, len);
1141 if (type && mode[0] != 'r') {
1143 * Skip to write part
1145 const char *s = strchr(type, 0);
1146 if (s && (s - type) < len) {
1155 static PerlIO_funcs *
1156 PerlIO_layer_from_ref(pTHX_ SV *sv)
1159 * For any scalar type load the handler which is bundled with perl
1161 if (SvTYPE(sv) < SVt_PVAV)
1162 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1165 * For other types allow if layer is known but don't try and load it
1167 switch (SvTYPE(sv)) {
1169 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1171 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1173 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1175 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1181 PerlIO_resolve_layers(pTHX_ const char *layers,
1182 const char *mode, int narg, SV **args)
1184 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1187 PerlIO_stdstreams(aTHX);
1191 * If it is a reference but not an object see if we have a handler
1194 if (SvROK(arg) && !sv_isobject(arg)) {
1195 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1197 def = PerlIO_list_alloc(aTHX);
1198 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1202 * Don't fail if handler cannot be found :Via(...) etc. may do
1203 * something sensible else we will just stringfy and open
1209 layers = PerlIO_context_layers(aTHX_ mode);
1210 if (layers && *layers) {
1214 av = PerlIO_list_alloc(aTHX);
1215 for (i = 0; i < def->cur; i++) {
1216 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1223 PerlIO_parse_layers(aTHX_ av, layers);
1234 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1235 int imode, int perm, PerlIO *f, int narg, SV **args)
1237 if (!f && narg == 1 && *args == &PL_sv_undef) {
1238 if ((f = PerlIO_tmpfile())) {
1240 layers = PerlIO_context_layers(aTHX_ mode);
1241 if (layers && *layers)
1242 PerlIO_apply_layers(aTHX_ f, mode, layers);
1246 PerlIO_list_t *layera = NULL;
1248 PerlIO_funcs *tab = NULL;
1251 * This is "reopen" - it is not tested as perl does not use it
1255 layera = PerlIO_list_alloc(aTHX);
1258 (l->tab->Getarg) ? (*l->tab->
1259 Getarg) (aTHX_ &l, NULL, 0) : &PL_sv_undef;
1260 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1261 l = *PerlIONext(&l);
1265 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1268 * Start at "top" of layer stack
1270 n = layera->cur - 1;
1272 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1281 * Found that layer 'n' can do opens - call it
1283 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1284 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1286 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1287 tab->name, layers, mode, fd, imode, perm,
1288 (void*)f, narg, (void*)args);
1289 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1292 if (n + 1 < layera->cur) {
1294 * More layers above the one that we used to open -
1297 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1304 PerlIO_list_free(aTHX_ layera);
1311 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1314 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1316 SETERRNO(EBADF, SS$_IVCHAN);
1322 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1325 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1327 SETERRNO(EBADF, SS$_IVCHAN);
1333 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1336 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1338 SETERRNO(EBADF, SS$_IVCHAN);
1344 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1347 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1349 SETERRNO(EBADF, SS$_IVCHAN);
1355 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1358 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1360 SETERRNO(EBADF, SS$_IVCHAN);
1366 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1370 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1371 if (tab && tab->Flush) {
1372 return (*tab->Flush) (aTHX_ f);
1375 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1376 SETERRNO(EBADF, SS$_IVCHAN);
1381 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1382 SETERRNO(EBADF, SS$_IVCHAN);
1388 * Is it good API design to do flush-all on NULL, a potentially
1389 * errorneous input? Maybe some magical value (PerlIO*
1390 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1391 * things on fflush(NULL), but should we be bound by their design
1394 PerlIO **table = &PL_perlio;
1396 while ((f = *table)) {
1398 table = (PerlIO **) (f++);
1399 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1400 if (*f && PerlIO_flush(f) != 0)
1410 PerlIOBase_flush_linebuf(pTHX)
1412 PerlIO **table = &PL_perlio;
1414 while ((f = *table)) {
1416 table = (PerlIO **) (f++);
1417 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1420 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1421 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1429 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1432 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1434 SETERRNO(EBADF, SS$_IVCHAN);
1440 PerlIO_isutf8(PerlIO *f)
1443 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1445 SETERRNO(EBADF, SS$_IVCHAN);
1451 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1454 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1456 SETERRNO(EBADF, SS$_IVCHAN);
1462 Perl_PerlIO_error(pTHX_ PerlIO *f)
1465 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1467 SETERRNO(EBADF, SS$_IVCHAN);
1473 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1476 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1478 SETERRNO(EBADF, SS$_IVCHAN);
1482 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1485 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1487 SETERRNO(EBADF, SS$_IVCHAN);
1491 PerlIO_has_base(PerlIO *f)
1494 return (PerlIOBase(f)->tab->Get_base != NULL);
1500 PerlIO_fast_gets(PerlIO *f)
1502 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1503 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1504 return (tab->Set_ptrcnt != NULL);
1510 PerlIO_has_cntptr(PerlIO *f)
1513 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1514 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1520 PerlIO_canset_cnt(PerlIO *f)
1523 PerlIOl *l = PerlIOBase(f);
1524 return (l->tab->Set_ptrcnt != NULL);
1530 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1533 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1538 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1541 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1546 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1548 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1549 if (tab->Get_ptr == NULL)
1551 return (*tab->Get_ptr) (aTHX_ f);
1555 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1557 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1558 if (tab->Get_cnt == NULL)
1560 return (*tab->Get_cnt) (aTHX_ f);
1564 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1566 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1570 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1572 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1573 if (tab->Set_ptrcnt == NULL) {
1574 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1576 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1579 /*--------------------------------------------------------------------------------------*/
1581 * utf8 and raw dummy layers
1585 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1587 if (PerlIONext(f)) {
1588 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1589 PerlIO_pop(aTHX_ f);
1590 if (tab->kind & PERLIO_K_UTF8)
1591 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1593 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1599 PerlIO_funcs PerlIO_utf8 = {
1602 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1620 NULL, /* get_base */
1621 NULL, /* get_bufsiz */
1624 NULL, /* set_ptrcnt */
1627 PerlIO_funcs PerlIO_byte = {
1648 NULL, /* get_base */
1649 NULL, /* get_bufsiz */
1652 NULL, /* set_ptrcnt */
1656 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1657 IV n, const char *mode, int fd, int imode, int perm,
1658 PerlIO *old, int narg, SV **args)
1660 PerlIO_funcs *tab = PerlIO_default_btm();
1661 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1665 PerlIO_funcs PerlIO_raw = {
1686 NULL, /* get_base */
1687 NULL, /* get_bufsiz */
1690 NULL, /* set_ptrcnt */
1692 /*--------------------------------------------------------------------------------------*/
1693 /*--------------------------------------------------------------------------------------*/
1695 * "Methods" of the "base class"
1699 PerlIOBase_fileno(pTHX_ PerlIO *f)
1701 return PerlIO_fileno(PerlIONext(f));
1705 PerlIO_modestr(PerlIO *f, char *buf)
1708 IV flags = PerlIOBase(f)->flags;
1709 if (flags & PERLIO_F_APPEND) {
1711 if (flags & PERLIO_F_CANREAD) {
1715 else if (flags & PERLIO_F_CANREAD) {
1717 if (flags & PERLIO_F_CANWRITE)
1720 else if (flags & PERLIO_F_CANWRITE) {
1722 if (flags & PERLIO_F_CANREAD) {
1726 #ifdef PERLIO_USING_CRLF
1727 if (!(flags & PERLIO_F_CRLF))
1735 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1737 PerlIOl *l = PerlIOBase(f);
1739 const char *omode = mode;
1742 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1743 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1744 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1745 if (tab->Set_ptrcnt != NULL)
1746 l->flags |= PERLIO_F_FASTGETS;
1748 if (*mode == '#' || *mode == 'I')
1752 l->flags |= PERLIO_F_CANREAD;
1755 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1758 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1761 SETERRNO(EINVAL, LIB$_INVARG);
1767 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1770 l->flags &= ~PERLIO_F_CRLF;
1773 l->flags |= PERLIO_F_CRLF;
1776 SETERRNO(EINVAL, LIB$_INVARG);
1783 l->flags |= l->next->flags &
1784 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1789 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1790 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1791 l->flags, PerlIO_modestr(f, temp));
1797 PerlIOBase_popped(pTHX_ PerlIO *f)
1803 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1806 * Save the position as current head considers it
1808 Off_t old = PerlIO_tell(f);
1810 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1811 PerlIOSelf(f, PerlIOBuf)->posn = old;
1812 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1817 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1819 STDCHAR *buf = (STDCHAR *) vbuf;
1821 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1824 SSize_t avail = PerlIO_get_cnt(f);
1827 take = (count < avail) ? count : avail;
1829 STDCHAR *ptr = PerlIO_get_ptr(f);
1830 Copy(ptr, buf, take, STDCHAR);
1831 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1835 if (count > 0 && avail <= 0) {
1836 if (PerlIO_fill(f) != 0)
1840 return (buf - (STDCHAR *) vbuf);
1846 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1852 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1858 PerlIOBase_close(pTHX_ PerlIO *f)
1861 PerlIO *n = PerlIONext(f);
1862 if (PerlIO_flush(f) != 0)
1864 if (n && *n && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1866 PerlIOBase(f)->flags &=
1867 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1872 PerlIOBase_eof(pTHX_ PerlIO *f)
1875 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1881 PerlIOBase_error(pTHX_ PerlIO *f)
1884 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1890 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1893 PerlIO *n = PerlIONext(f);
1894 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1901 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
1904 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1909 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1915 return sv_dup(arg, param);
1918 return newSVsv(arg);
1921 return newSVsv(arg);
1926 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1928 PerlIO *nexto = PerlIONext(o);
1930 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1931 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
1934 PerlIO_funcs *self = PerlIOBase(o)->tab;
1937 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
1938 self->name, (void*)f, (void*)o, (void*)param);
1940 arg = (*self->Getarg)(aTHX_ o,param,flags);
1942 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1950 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1952 perl_mutex PerlIO_mutex;
1954 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
1959 /* Place holder for stdstreams call ??? */
1961 MUTEX_INIT(&PerlIO_mutex);
1966 PerlIOUnix_refcnt_inc(int fd)
1968 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1970 MUTEX_LOCK(&PerlIO_mutex);
1972 PerlIO_fd_refcnt[fd]++;
1973 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
1975 MUTEX_UNLOCK(&PerlIO_mutex);
1981 PerlIOUnix_refcnt_dec(int fd)
1984 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1986 MUTEX_LOCK(&PerlIO_mutex);
1988 cnt = --PerlIO_fd_refcnt[fd];
1989 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
1991 MUTEX_UNLOCK(&PerlIO_mutex);
1998 PerlIO_cleanup(pTHX)
2002 PerlIO_debug("Cleanup %p\n",aTHX);
2004 /* Raise STDIN..STDERR refcount so we don't close them */
2005 for (i=0; i < 3; i++)
2006 PerlIOUnix_refcnt_inc(i);
2007 PerlIO_cleantable(aTHX_ &PL_perlio);
2008 /* Restore STDIN..STDERR refcount */
2009 for (i=0; i < 3; i++)
2010 PerlIOUnix_refcnt_dec(i);
2015 /*--------------------------------------------------------------------------------------*/
2017 * Bottom-most level for UNIX-like case
2021 struct _PerlIO base; /* The generic part */
2022 int fd; /* UNIX like file descriptor */
2023 int oflags; /* open/fcntl flags */
2027 PerlIOUnix_oflags(const char *mode)
2030 if (*mode == 'I' || *mode == '#')
2035 if (*++mode == '+') {
2042 oflags = O_CREAT | O_TRUNC;
2043 if (*++mode == '+') {
2052 oflags = O_CREAT | O_APPEND;
2053 if (*++mode == '+') {
2066 else if (*mode == 't') {
2068 oflags &= ~O_BINARY;
2072 * Always open in binary mode
2075 if (*mode || oflags == -1) {
2076 SETERRNO(EINVAL, LIB$_INVARG);
2083 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2085 return PerlIOSelf(f, PerlIOUnix)->fd;
2089 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2091 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2092 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2093 if (*PerlIONext(f)) {
2094 s->fd = PerlIO_fileno(PerlIONext(f));
2096 * XXX could (or should) we retrieve the oflags from the open file
2097 * handle rather than believing the "mode" we are passed in? XXX
2098 * Should the value on NULL mode be 0 or -1?
2100 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2102 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2107 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2108 IV n, const char *mode, int fd, int imode,
2109 int perm, PerlIO *f, int narg, SV **args)
2112 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2113 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2116 char *path = SvPV_nolen(*args);
2120 imode = PerlIOUnix_oflags(mode);
2124 fd = PerlLIO_open3(path, imode, perm);
2132 f = PerlIO_allocate(aTHX);
2133 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2137 s = PerlIOSelf(f, PerlIOUnix);
2140 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2141 PerlIOUnix_refcnt_inc(fd);
2147 * FIXME: pop layers ???
2155 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2157 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2159 if (flags & PERLIO_DUP_FD) {
2160 fd = PerlLIO_dup(fd);
2162 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2163 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2165 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2166 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2168 PerlIOUnix_refcnt_inc(fd);
2177 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2179 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2180 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2183 SSize_t len = PerlLIO_read(fd, vbuf, count);
2184 if (len >= 0 || errno != EINTR) {
2186 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2187 else if (len == 0 && count != 0)
2188 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2196 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2198 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2200 SSize_t len = PerlLIO_write(fd, vbuf, count);
2201 if (len >= 0 || errno != EINTR) {
2203 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2211 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2214 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2215 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2216 return (new == (Off_t) - 1) ? -1 : 0;
2220 PerlIOUnix_tell(pTHX_ PerlIO *f)
2222 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2227 PerlIOUnix_close(pTHX_ PerlIO *f)
2229 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2231 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2232 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2233 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2238 SETERRNO(EBADF,SS$_IVCHAN);
2241 while (PerlLIO_close(fd) != 0) {
2242 if (errno != EINTR) {
2249 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2254 PerlIO_funcs PerlIO_unix = {
2270 PerlIOBase_noop_ok, /* flush */
2271 PerlIOBase_noop_fail, /* fill */
2274 PerlIOBase_clearerr,
2275 PerlIOBase_setlinebuf,
2276 NULL, /* get_base */
2277 NULL, /* get_bufsiz */
2280 NULL, /* set_ptrcnt */
2283 /*--------------------------------------------------------------------------------------*/
2289 struct _PerlIO base;
2290 FILE *stdio; /* The stream */
2294 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2296 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2300 PerlIOStdio_mode(const char *mode, char *tmode)
2306 #ifdef PERLIO_USING_CRLF
2314 * This isn't used yet ...
2317 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2319 if (*PerlIONext(f)) {
2320 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2323 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2324 PerlIOStdio_mode(mode, tmode));
2330 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2334 PerlIO_importFILE(FILE *stdio, int fl)
2340 PerlIOSelf(PerlIO_push
2341 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2342 "r+", Nullsv), PerlIOStdio);
2349 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2350 IV n, const char *mode, int fd, int imode,
2351 int perm, PerlIO *f, int narg, SV **args)
2355 char *path = SvPV_nolen(*args);
2356 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2358 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2359 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2364 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2369 char *path = SvPV_nolen(*args);
2372 fd = PerlLIO_open3(path, imode, perm);
2375 FILE *stdio = PerlSIO_fopen(path, mode);
2378 PerlIOSelf(PerlIO_push
2379 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2380 (mode = PerlIOStdio_mode(mode, tmode)),
2384 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2399 stdio = PerlSIO_stdin;
2402 stdio = PerlSIO_stdout;
2405 stdio = PerlSIO_stderr;
2410 stdio = PerlSIO_fdopen(fd, mode =
2411 PerlIOStdio_mode(mode, tmode));
2415 PerlIOSelf(PerlIO_push
2416 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2417 mode, PerlIOArg), PerlIOStdio);
2419 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2428 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2430 /* This assumes no layers underneath - which is what
2431 happens, but is not how I remember it. NI-S 2001/10/16
2433 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2434 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2435 if (flags & PERLIO_DUP_FD) {
2436 int fd = PerlLIO_dup(fileno(stdio));
2439 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2442 /* FIXME: To avoid messy error recovery if dup fails
2443 re-use the existing stdio as though flag was not set
2447 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2448 PerlIOUnix_refcnt_inc(fileno(stdio));
2454 PerlIOStdio_close(pTHX_ PerlIO *f)
2456 #ifdef SOCKS5_VERSION_NAME
2458 Sock_size_t optlen = sizeof(int);
2460 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2461 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2462 /* Do not close it but do flush any buffers */
2467 #ifdef SOCKS5_VERSION_NAME
2469 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2471 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2473 PerlSIO_fclose(stdio)
2482 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2484 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2487 STDCHAR *buf = (STDCHAR *) vbuf;
2489 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2490 * stdio does not do that for fread()
2492 int ch = PerlSIO_fgetc(s);
2499 got = PerlSIO_fread(vbuf, 1, count, s);
2504 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2506 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2507 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2510 int ch = *buf-- & 0xff;
2511 if (PerlSIO_ungetc(ch, s) != ch)
2520 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2522 return PerlSIO_fwrite(vbuf, 1, count,
2523 PerlIOSelf(f, PerlIOStdio)->stdio);
2527 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2529 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2530 return PerlSIO_fseek(stdio, offset, whence);
2534 PerlIOStdio_tell(pTHX_ PerlIO *f)
2536 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2537 return PerlSIO_ftell(stdio);
2541 PerlIOStdio_flush(pTHX_ PerlIO *f)
2543 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2544 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2545 return PerlSIO_fflush(stdio);
2550 * FIXME: This discards ungetc() and pre-read stuff which is not
2551 * right if this is just a "sync" from a layer above Suspect right
2552 * design is to do _this_ but not have layer above flush this
2553 * layer read-to-read
2556 * Not writeable - sync by attempting a seek
2559 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2567 PerlIOStdio_fill(pTHX_ PerlIO *f)
2569 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2572 * fflush()ing read-only streams can cause trouble on some stdio-s
2574 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2575 if (PerlSIO_fflush(stdio) != 0)
2578 c = PerlSIO_fgetc(stdio);
2579 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2585 PerlIOStdio_eof(pTHX_ PerlIO *f)
2587 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2591 PerlIOStdio_error(pTHX_ PerlIO *f)
2593 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2597 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2599 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2603 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2605 #ifdef HAS_SETLINEBUF
2606 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2608 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2614 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2616 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2617 return (STDCHAR*)PerlSIO_get_base(stdio);
2621 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2623 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2624 return PerlSIO_get_bufsiz(stdio);
2628 #ifdef USE_STDIO_PTR
2630 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2632 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2633 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2637 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2639 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2640 return PerlSIO_get_cnt(stdio);
2644 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2646 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2648 #ifdef STDIO_PTR_LVALUE
2649 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2650 #ifdef STDIO_PTR_LVAL_SETS_CNT
2651 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2652 assert(PerlSIO_get_cnt(stdio) == (cnt));
2655 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2657 * Setting ptr _does_ change cnt - we are done
2661 #else /* STDIO_PTR_LVALUE */
2663 #endif /* STDIO_PTR_LVALUE */
2666 * Now (or only) set cnt
2668 #ifdef STDIO_CNT_LVALUE
2669 PerlSIO_set_cnt(stdio, cnt);
2670 #else /* STDIO_CNT_LVALUE */
2671 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2672 PerlSIO_set_ptr(stdio,
2673 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2675 #else /* STDIO_PTR_LVAL_SETS_CNT */
2677 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2678 #endif /* STDIO_CNT_LVALUE */
2683 PerlIO_funcs PerlIO_stdio = {
2685 sizeof(PerlIOStdio),
2703 PerlIOStdio_clearerr,
2704 PerlIOStdio_setlinebuf,
2706 PerlIOStdio_get_base,
2707 PerlIOStdio_get_bufsiz,
2712 #ifdef USE_STDIO_PTR
2713 PerlIOStdio_get_ptr,
2714 PerlIOStdio_get_cnt,
2715 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2716 PerlIOStdio_set_ptrcnt
2717 #else /* STDIO_PTR_LVALUE */
2719 #endif /* STDIO_PTR_LVALUE */
2720 #else /* USE_STDIO_PTR */
2724 #endif /* USE_STDIO_PTR */
2728 PerlIO_exportFILE(PerlIO *f, int fl)
2733 stdio = fdopen(PerlIO_fileno(f), "r+");
2736 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2744 PerlIO_findFILE(PerlIO *f)
2748 if (l->tab == &PerlIO_stdio) {
2749 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2752 l = *PerlIONext(&l);
2754 return PerlIO_exportFILE(f, 0);
2758 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2762 /*--------------------------------------------------------------------------------------*/
2764 * perlio buffer layer
2768 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2770 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2771 int fd = PerlIO_fileno(f);
2773 if (fd >= 0 && PerlLIO_isatty(fd)) {
2774 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2776 posn = PerlIO_tell(PerlIONext(f));
2777 if (posn != (Off_t) - 1) {
2780 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2784 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2785 IV n, const char *mode, int fd, int imode, int perm,
2786 PerlIO *f, int narg, SV **args)
2789 PerlIO *next = PerlIONext(f);
2791 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2793 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2796 || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
2802 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2810 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2813 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2815 * if push fails during open, open fails. close will pop us.
2820 fd = PerlIO_fileno(f);
2821 #ifdef PERLIO_USING_CRLF
2823 * do something about failing setmode()? --jhi
2825 PerlLIO_setmode(fd, O_BINARY);
2827 if (init && fd == 2) {
2829 * Initial stderr is unbuffered
2831 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2840 * This "flush" is akin to sfio's sync in that it handles files in either
2841 * read or write state
2844 PerlIOBuf_flush(pTHX_ PerlIO *f)
2846 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2848 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2850 * write() the buffer
2852 STDCHAR *buf = b->buf;
2854 PerlIO *n = PerlIONext(f);
2855 while (p < b->ptr) {
2856 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2860 else if (count < 0 || PerlIO_error(n)) {
2861 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2866 b->posn += (p - buf);
2868 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2869 STDCHAR *buf = PerlIO_get_base(f);
2871 * Note position change
2873 b->posn += (b->ptr - buf);
2874 if (b->ptr < b->end) {
2876 * We did not consume all of it
2878 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2879 b->posn = PerlIO_tell(PerlIONext(f));
2883 b->ptr = b->end = b->buf;
2884 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2886 * FIXME: Is this right for read case ?
2888 if (PerlIO_flush(PerlIONext(f)) != 0)
2894 PerlIOBuf_fill(pTHX_ PerlIO *f)
2896 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2897 PerlIO *n = PerlIONext(f);
2900 * FIXME: doing the down-stream flush is a bad idea if it causes
2901 * pre-read data in stdio buffer to be discarded but this is too
2902 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2903 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2905 if (PerlIO_flush(f) != 0)
2907 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2908 PerlIOBase_flush_linebuf(aTHX);
2911 PerlIO_get_base(f); /* allocate via vtable */
2913 b->ptr = b->end = b->buf;
2914 if (PerlIO_fast_gets(n)) {
2916 * Layer below is also buffered We do _NOT_ want to call its
2917 * ->Read() because that will loop till it gets what we asked for
2918 * which may hang on a pipe etc. Instead take anything it has to
2919 * hand, or ask it to fill _once_.
2921 avail = PerlIO_get_cnt(n);
2923 avail = PerlIO_fill(n);
2925 avail = PerlIO_get_cnt(n);
2927 if (!PerlIO_error(n) && PerlIO_eof(n))
2932 STDCHAR *ptr = PerlIO_get_ptr(n);
2933 SSize_t cnt = avail;
2934 if (avail > b->bufsiz)
2936 Copy(ptr, b->buf, avail, STDCHAR);
2937 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2941 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2945 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2947 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2950 b->end = b->buf + avail;
2951 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2956 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2958 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2962 return PerlIOBase_read(aTHX_ f, vbuf, count);
2968 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2970 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2971 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2974 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2979 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2981 * Buffer is already a read buffer, we can overwrite any chars
2982 * which have been read back to buffer start
2984 avail = (b->ptr - b->buf);
2988 * Buffer is idle, set it up so whole buffer is available for
2992 b->end = b->buf + avail;
2994 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2996 * Buffer extends _back_ from where we are now
2998 b->posn -= b->bufsiz;
3000 if (avail > (SSize_t) count) {
3002 * If we have space for more than count, just move count
3010 * In simple stdio-like ungetc() case chars will be already
3013 if (buf != b->ptr) {
3014 Copy(buf, b->ptr, avail, STDCHAR);
3018 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3025 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3027 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3028 const STDCHAR *buf = (const STDCHAR *) vbuf;
3032 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3035 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3036 if ((SSize_t) count < avail)
3038 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3039 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3054 Copy(buf, b->ptr, avail, STDCHAR);
3061 if (b->ptr >= (b->buf + b->bufsiz))
3064 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3070 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3073 if ((code = PerlIO_flush(f)) == 0) {
3074 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3075 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3076 code = PerlIO_seek(PerlIONext(f), offset, whence);
3078 b->posn = PerlIO_tell(PerlIONext(f));
3085 PerlIOBuf_tell(pTHX_ PerlIO *f)
3087 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3089 * b->posn is file position where b->buf was read, or will be written
3091 Off_t posn = b->posn;
3094 * If buffer is valid adjust position by amount in buffer
3096 posn += (b->ptr - b->buf);
3102 PerlIOBuf_close(pTHX_ PerlIO *f)
3104 IV code = PerlIOBase_close(aTHX_ f);
3105 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3106 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3110 b->ptr = b->end = b->buf;
3111 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3116 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3118 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3125 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3127 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3130 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3131 return (b->end - b->ptr);
3136 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3138 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3143 Newz('B',b->buf,b->bufsiz, STDCHAR);
3145 b->buf = (STDCHAR *) & b->oneword;
3146 b->bufsiz = sizeof(b->oneword);
3155 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3157 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3160 return (b->end - b->buf);
3164 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3166 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3170 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3171 assert(PerlIO_get_cnt(f) == cnt);
3172 assert(b->ptr >= b->buf);
3174 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3178 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3180 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3185 PerlIO_funcs PerlIO_perlio = {
3205 PerlIOBase_clearerr,
3206 PerlIOBase_setlinebuf,
3211 PerlIOBuf_set_ptrcnt,
3214 /*--------------------------------------------------------------------------------------*/
3216 * Temp layer to hold unread chars when cannot do it any other way
3220 PerlIOPending_fill(pTHX_ PerlIO *f)
3223 * Should never happen
3230 PerlIOPending_close(pTHX_ PerlIO *f)
3233 * A tad tricky - flush pops us, then we close new top
3236 return PerlIO_close(f);
3240 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3243 * A tad tricky - flush pops us, then we seek new top
3246 return PerlIO_seek(f, offset, whence);
3251 PerlIOPending_flush(pTHX_ PerlIO *f)
3253 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3254 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3258 PerlIO_pop(aTHX_ f);
3263 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3269 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3274 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3276 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3277 PerlIOl *l = PerlIOBase(f);
3279 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3280 * etc. get muddled when it changes mid-string when we auto-pop.
3282 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3283 (PerlIOBase(PerlIONext(f))->
3284 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3289 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3291 SSize_t avail = PerlIO_get_cnt(f);
3296 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3297 if (got >= 0 && got < count) {
3299 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3300 if (more >= 0 || got == 0)
3306 PerlIO_funcs PerlIO_pending = {
3310 PerlIOPending_pushed,
3321 PerlIOPending_close,
3322 PerlIOPending_flush,
3326 PerlIOBase_clearerr,
3327 PerlIOBase_setlinebuf,
3332 PerlIOPending_set_ptrcnt,
3337 /*--------------------------------------------------------------------------------------*/
3339 * crlf - translation On read translate CR,LF to "\n" we do this by
3340 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3341 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3345 PerlIOBuf base; /* PerlIOBuf stuff */
3346 STDCHAR *nl; /* Position of crlf we "lied" about in the
3351 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3354 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3355 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3357 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3358 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3359 PerlIOBase(f)->flags);
3366 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3368 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3373 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3374 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3376 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3377 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3379 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3384 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3385 b->end = b->ptr = b->buf + b->bufsiz;
3386 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3387 b->posn -= b->bufsiz;
3389 while (count > 0 && b->ptr > b->buf) {
3392 if (b->ptr - 2 >= b->buf) {
3415 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3417 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3420 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3421 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3422 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3423 STDCHAR *nl = b->ptr;
3425 while (nl < b->end && *nl != 0xd)
3427 if (nl < b->end && *nl == 0xd) {
3429 if (nl + 1 < b->end) {
3436 * Not CR,LF but just CR
3444 * Blast - found CR as last char in buffer
3449 * They may not care, defer work as long as
3453 return (nl - b->ptr);
3457 b->ptr++; /* say we have read it as far as
3458 * flush() is concerned */
3459 b->buf++; /* Leave space in front of buffer */
3460 b->bufsiz--; /* Buffer is thus smaller */
3461 code = PerlIO_fill(f); /* Fetch some more */
3462 b->bufsiz++; /* Restore size for next time */
3463 b->buf--; /* Point at space */
3464 b->ptr = nl = b->buf; /* Which is what we hand
3466 b->posn--; /* Buffer starts here */
3467 *nl = 0xd; /* Fill in the CR */
3469 goto test; /* fill() call worked */
3471 * CR at EOF - just fall through
3473 /* Should we clear EOF though ??? */
3478 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3484 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3486 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3487 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3488 IV flags = PerlIOBase(f)->flags;
3494 if (ptr == b->end && *c->nl == 0xd) {
3495 /* Defered CR at end of buffer case - we lied about count */
3506 * Test code - delete when it works ...
3508 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3509 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3510 /* Defered CR at end of buffer case - we lied about count */
3516 Perl_warn(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3517 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3524 * They have taken what we lied about
3532 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3536 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3538 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3539 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3541 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3542 const STDCHAR *buf = (const STDCHAR *) vbuf;
3543 const STDCHAR *ebuf = buf + count;
3546 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3548 while (buf < ebuf) {
3549 STDCHAR *eptr = b->buf + b->bufsiz;
3550 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3551 while (buf < ebuf && b->ptr < eptr) {
3553 if ((b->ptr + 2) > eptr) {
3561 *(b->ptr)++ = 0xd; /* CR */
3562 *(b->ptr)++ = 0xa; /* LF */
3564 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3574 if (b->ptr >= eptr) {
3580 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3582 return (buf - (STDCHAR *) vbuf);
3587 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3589 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3594 return PerlIOBuf_flush(aTHX_ f);
3597 PerlIO_funcs PerlIO_crlf = {
3600 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3602 PerlIOBase_noop_ok, /* popped */
3607 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3609 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3610 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3618 PerlIOBase_clearerr,
3619 PerlIOBase_setlinebuf,
3624 PerlIOCrlf_set_ptrcnt,
3628 /*--------------------------------------------------------------------------------------*/
3630 * mmap as "buffer" layer
3634 PerlIOBuf base; /* PerlIOBuf stuff */
3635 Mmap_t mptr; /* Mapped address */
3636 Size_t len; /* mapped length */
3637 STDCHAR *bbuf; /* malloced buffer if map fails */
3640 static size_t page_size = 0;
3643 PerlIOMmap_map(pTHX_ PerlIO *f)
3645 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3646 IV flags = PerlIOBase(f)->flags;
3650 if (flags & PERLIO_F_CANREAD) {
3651 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3652 int fd = PerlIO_fileno(f);
3654 code = Fstat(fd, &st);
3655 if (code == 0 && S_ISREG(st.st_mode)) {
3656 SSize_t len = st.st_size - b->posn;
3660 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3662 SETERRNO(0, SS$_NORMAL);
3663 # ifdef _SC_PAGESIZE
3664 page_size = sysconf(_SC_PAGESIZE);
3666 page_size = sysconf(_SC_PAGE_SIZE);
3668 if ((long) page_size < 0) {
3673 (void) SvUPGRADE(error, SVt_PV);
3674 msg = SvPVx(error, n_a);
3675 Perl_croak(aTHX_ "panic: sysconf: %s",
3680 "panic: sysconf: pagesize unknown");
3684 # ifdef HAS_GETPAGESIZE
3685 page_size = getpagesize();
3687 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3688 page_size = PAGESIZE; /* compiletime, bad */
3692 if ((IV) page_size <= 0)
3693 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3698 * This is a hack - should never happen - open should
3701 b->posn = PerlIO_tell(PerlIONext(f));
3703 posn = (b->posn / page_size) * page_size;
3704 len = st.st_size - posn;
3705 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3706 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3707 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3708 madvise(m->mptr, len, MADV_SEQUENTIAL);
3710 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3711 madvise(m->mptr, len, MADV_WILLNEED);
3713 PerlIOBase(f)->flags =
3714 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3715 b->end = ((STDCHAR *) m->mptr) + len;
3716 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3725 PerlIOBase(f)->flags =
3726 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3728 b->ptr = b->end = b->ptr;
3737 PerlIOMmap_unmap(pTHX_ PerlIO *f)
3739 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3740 PerlIOBuf *b = &m->base;
3744 code = munmap(m->mptr, m->len);
3748 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3751 b->ptr = b->end = b->buf;
3752 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3758 PerlIOMmap_get_base(pTHX_ PerlIO *f)
3760 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3761 PerlIOBuf *b = &m->base;
3762 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3764 * Already have a readbuffer in progress
3770 * We have a write buffer or flushed PerlIOBuf read buffer
3772 m->bbuf = b->buf; /* save it in case we need it again */
3773 b->buf = NULL; /* Clear to trigger below */
3776 PerlIOMmap_map(aTHX_ f); /* Try and map it */
3779 * Map did not work - recover PerlIOBuf buffer if we have one
3784 b->ptr = b->end = b->buf;
3787 return PerlIOBuf_get_base(aTHX_ f);
3791 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3793 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3794 PerlIOBuf *b = &m->base;
3795 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3797 if (b->ptr && (b->ptr - count) >= b->buf
3798 && memEQ(b->ptr - count, vbuf, count)) {
3800 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3805 * Loose the unwritable mapped buffer
3809 * If flush took the "buffer" see if we have one from before
3811 if (!b->buf && m->bbuf)
3814 PerlIOBuf_get_base(aTHX_ f);
3818 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3822 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3824 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3825 PerlIOBuf *b = &m->base;
3826 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3828 * No, or wrong sort of, buffer
3831 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3835 * If unmap took the "buffer" see if we have one from before
3837 if (!b->buf && m->bbuf)
3840 PerlIOBuf_get_base(aTHX_ f);
3844 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3848 PerlIOMmap_flush(pTHX_ PerlIO *f)
3850 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3851 PerlIOBuf *b = &m->base;
3852 IV code = PerlIOBuf_flush(aTHX_ f);
3854 * Now we are "synced" at PerlIOBuf level
3861 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3866 * We seem to have a PerlIOBuf buffer which was not mapped
3867 * remember it in case we need one later
3876 PerlIOMmap_fill(pTHX_ PerlIO *f)
3878 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3879 IV code = PerlIO_flush(f);
3880 if (code == 0 && !b->buf) {
3881 code = PerlIOMmap_map(aTHX_ f);
3883 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3884 code = PerlIOBuf_fill(aTHX_ f);
3890 PerlIOMmap_close(pTHX_ PerlIO *f)
3892 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3893 PerlIOBuf *b = &m->base;
3894 IV code = PerlIO_flush(f);
3898 b->ptr = b->end = b->buf;
3900 if (PerlIOBuf_close(aTHX_ f) != 0)
3906 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3908 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3912 PerlIO_funcs PerlIO_mmap = {
3932 PerlIOBase_clearerr,
3933 PerlIOBase_setlinebuf,
3934 PerlIOMmap_get_base,
3938 PerlIOBuf_set_ptrcnt,
3941 #endif /* HAS_MMAP */
3944 Perl_PerlIO_stdin(pTHX)
3947 PerlIO_stdstreams(aTHX);
3949 return &PL_perlio[1];
3953 Perl_PerlIO_stdout(pTHX)
3956 PerlIO_stdstreams(aTHX);
3958 return &PL_perlio[2];
3962 Perl_PerlIO_stderr(pTHX)
3965 PerlIO_stdstreams(aTHX);
3967 return &PL_perlio[3];
3970 /*--------------------------------------------------------------------------------------*/
3973 PerlIO_getname(PerlIO *f, char *buf)
3978 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3980 name = fgetname(stdio, buf);
3982 Perl_croak(aTHX_ "Don't know how to get file name");
3988 /*--------------------------------------------------------------------------------------*/
3990 * Functions which can be called on any kind of PerlIO implemented in
3994 #undef PerlIO_fdopen
3996 PerlIO_fdopen(int fd, const char *mode)
3999 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4004 PerlIO_open(const char *path, const char *mode)
4007 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4008 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4011 #undef Perlio_reopen
4013 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4016 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4017 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4022 PerlIO_getc(PerlIO *f)
4026 SSize_t count = PerlIO_read(f, buf, 1);
4028 return (unsigned char) buf[0];
4033 #undef PerlIO_ungetc
4035 PerlIO_ungetc(PerlIO *f, int ch)
4040 if (PerlIO_unread(f, &buf, 1) == 1)
4048 PerlIO_putc(PerlIO *f, int ch)
4052 return PerlIO_write(f, &buf, 1);
4057 PerlIO_puts(PerlIO *f, const char *s)
4060 STRLEN len = strlen(s);
4061 return PerlIO_write(f, s, len);
4064 #undef PerlIO_rewind
4066 PerlIO_rewind(PerlIO *f)
4069 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4073 #undef PerlIO_vprintf
4075 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4078 SV *sv = newSVpvn("", 0);
4084 Perl_va_copy(ap, apc);
4085 sv_vcatpvf(sv, fmt, &apc);
4087 sv_vcatpvf(sv, fmt, &ap);
4090 wrote = PerlIO_write(f, s, len);
4095 #undef PerlIO_printf
4097 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4102 result = PerlIO_vprintf(f, fmt, ap);
4107 #undef PerlIO_stdoutf
4109 PerlIO_stdoutf(const char *fmt, ...)
4115 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4120 #undef PerlIO_tmpfile
4122 PerlIO_tmpfile(void)
4125 * I have no idea how portable mkstemp() is ...
4127 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4130 FILE *stdio = PerlSIO_tmpfile();
4133 PerlIOSelf(PerlIO_push
4134 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4135 "w+", Nullsv), PerlIOStdio);
4141 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4142 int fd = mkstemp(SvPVX(sv));
4145 f = PerlIO_fdopen(fd, "w+");
4147 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4149 PerlLIO_unlink(SvPVX(sv));
4159 #endif /* USE_SFIO */
4160 #endif /* PERLIO_IS_STDIO */
4162 /*======================================================================================*/
4164 * Now some functions in terms of above which may be needed even if we are
4165 * not in true PerlIO mode
4169 #undef PerlIO_setpos
4171 PerlIO_setpos(PerlIO *f, SV *pos)
4176 Off_t *posn = (Off_t *) SvPV(pos, len);
4177 if (f && len == sizeof(Off_t))
4178 return PerlIO_seek(f, *posn, SEEK_SET);
4180 SETERRNO(EINVAL, SS$_IVCHAN);
4184 #undef PerlIO_setpos
4186 PerlIO_setpos(PerlIO *f, SV *pos)
4191 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4192 if (f && len == sizeof(Fpos_t)) {
4193 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4194 return fsetpos64(f, fpos);
4196 return fsetpos(f, fpos);
4200 SETERRNO(EINVAL, SS$_IVCHAN);
4206 #undef PerlIO_getpos
4208 PerlIO_getpos(PerlIO *f, SV *pos)
4211 Off_t posn = PerlIO_tell(f);
4212 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4213 return (posn == (Off_t) - 1) ? -1 : 0;
4216 #undef PerlIO_getpos
4218 PerlIO_getpos(PerlIO *f, SV *pos)
4223 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4224 code = fgetpos64(f, &fpos);
4226 code = fgetpos(f, &fpos);
4228 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4233 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4236 vprintf(char *pat, char *args)
4238 _doprnt(pat, args, stdout);
4239 return 0; /* wrong, but perl doesn't use the return
4244 vfprintf(FILE *fd, char *pat, char *args)
4246 _doprnt(pat, args, fd);
4247 return 0; /* wrong, but perl doesn't use the return
4253 #ifndef PerlIO_vsprintf
4255 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4257 int val = vsprintf(s, fmt, ap);
4259 if (strlen(s) >= (STRLEN) n) {
4261 (void) PerlIO_puts(Perl_error_log,
4262 "panic: sprintf overflow - memory corrupted!\n");
4270 #ifndef PerlIO_sprintf
4272 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4277 result = PerlIO_vsprintf(s, n, fmt, ap);