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) (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) (f, mode, arg) != 0) {
985 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
998 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
1001 * Remove the dummy layer
1004 PerlIO_pop(aTHX_ f);
1006 * Pop back to bottom layer
1010 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1011 if (*PerlIONext(f)) {
1012 PerlIO_pop(aTHX_ f);
1016 * Nothing bellow - push unix on top then remove it
1018 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1019 PerlIO_pop(aTHX_ PerlIONext(f));
1024 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1031 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1032 PerlIO_list_t *layers, IV n)
1034 IV max = layers->cur;
1037 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1039 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1050 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1054 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1055 code = PerlIO_parse_layers(aTHX_ layers, names);
1057 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1059 PerlIO_list_free(aTHX_ layers);
1065 /*--------------------------------------------------------------------------------------*/
1067 * Given the abstraction above the public API functions
1071 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1073 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1074 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1075 (names) ? names : "(Null)");
1076 /* Can't flush if switching encodings. */
1077 if (!(names && memEQ(names, ":encoding(", 10))) {
1079 #ifdef PERLIO_USING_CRLF
1080 if (!names && (mode & O_BINARY)) {
1083 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1084 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1087 top = PerlIONext(top);
1093 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1096 #undef PerlIO__close
1098 PerlIO__close(PerlIO *f)
1101 return (*PerlIOBase(f)->tab->Close) (f);
1103 SETERRNO(EBADF, SS$_IVCHAN);
1110 PerlIO_close(PerlIO *f)
1115 code = (*PerlIOBase(f)->tab->Close) (f);
1117 PerlIO_pop(aTHX_ f);
1123 #undef PerlIO_fileno
1125 PerlIO_fileno(PerlIO *f)
1128 return (*PerlIOBase(f)->tab->Fileno) (f);
1130 SETERRNO(EBADF, SS$_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)
1347 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1349 SETERRNO(EBADF, SS$_IVCHAN);
1354 #undef PerlIO_unread
1356 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1359 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1361 SETERRNO(EBADF, SS$_IVCHAN);
1368 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1371 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1373 SETERRNO(EBADF, SS$_IVCHAN);
1380 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1383 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1385 SETERRNO(EBADF, SS$_IVCHAN);
1392 PerlIO_tell(PerlIO *f)
1395 return (*PerlIOBase(f)->tab->Tell) (f);
1397 SETERRNO(EBADF, SS$_IVCHAN);
1404 PerlIO_flush(PerlIO *f)
1408 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1409 if (tab && tab->Flush) {
1410 return (*tab->Flush) (f);
1413 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1414 SETERRNO(EBADF, SS$_IVCHAN);
1419 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1420 SETERRNO(EBADF, SS$_IVCHAN);
1426 * Is it good API design to do flush-all on NULL, a potentially
1427 * errorneous input? Maybe some magical value (PerlIO*
1428 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1429 * things on fflush(NULL), but should we be bound by their design
1433 PerlIO **table = &PL_perlio;
1435 while ((f = *table)) {
1437 table = (PerlIO **) (f++);
1438 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1439 if (*f && PerlIO_flush(f) != 0)
1449 PerlIOBase_flush_linebuf()
1452 PerlIO **table = &PL_perlio;
1454 while ((f = *table)) {
1456 table = (PerlIO **) (f++);
1457 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1460 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1461 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1470 PerlIO_fill(PerlIO *f)
1473 return (*PerlIOBase(f)->tab->Fill) (f);
1475 SETERRNO(EBADF, SS$_IVCHAN);
1480 #undef PerlIO_isutf8
1482 PerlIO_isutf8(PerlIO *f)
1485 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1487 SETERRNO(EBADF, SS$_IVCHAN);
1494 PerlIO_eof(PerlIO *f)
1497 return (*PerlIOBase(f)->tab->Eof) (f);
1499 SETERRNO(EBADF, SS$_IVCHAN);
1506 PerlIO_error(PerlIO *f)
1509 return (*PerlIOBase(f)->tab->Error) (f);
1511 SETERRNO(EBADF, SS$_IVCHAN);
1516 #undef PerlIO_clearerr
1518 PerlIO_clearerr(PerlIO *f)
1521 (*PerlIOBase(f)->tab->Clearerr) (f);
1523 SETERRNO(EBADF, SS$_IVCHAN);
1526 #undef PerlIO_setlinebuf
1528 PerlIO_setlinebuf(PerlIO *f)
1531 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1533 SETERRNO(EBADF, SS$_IVCHAN);
1536 #undef PerlIO_has_base
1538 PerlIO_has_base(PerlIO *f)
1541 return (PerlIOBase(f)->tab->Get_base != NULL);
1546 #undef PerlIO_fast_gets
1548 PerlIO_fast_gets(PerlIO *f)
1550 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1551 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1552 return (tab->Set_ptrcnt != NULL);
1557 #undef PerlIO_has_cntptr
1559 PerlIO_has_cntptr(PerlIO *f)
1562 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1563 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1568 #undef PerlIO_canset_cnt
1570 PerlIO_canset_cnt(PerlIO *f)
1573 PerlIOl *l = PerlIOBase(f);
1574 return (l->tab->Set_ptrcnt != NULL);
1579 #undef PerlIO_get_base
1581 PerlIO_get_base(PerlIO *f)
1584 return (*PerlIOBase(f)->tab->Get_base) (f);
1588 #undef PerlIO_get_bufsiz
1590 PerlIO_get_bufsiz(PerlIO *f)
1593 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1597 #undef PerlIO_get_ptr
1599 PerlIO_get_ptr(PerlIO *f)
1601 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1602 if (tab->Get_ptr == NULL)
1604 return (*tab->Get_ptr) (f);
1607 #undef PerlIO_get_cnt
1609 PerlIO_get_cnt(PerlIO *f)
1611 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1612 if (tab->Get_cnt == NULL)
1614 return (*tab->Get_cnt) (f);
1617 #undef PerlIO_set_cnt
1619 PerlIO_set_cnt(PerlIO *f, int cnt)
1621 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1624 #undef PerlIO_set_ptrcnt
1626 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1628 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1629 if (tab->Set_ptrcnt == NULL) {
1631 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1633 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1636 /*--------------------------------------------------------------------------------------*/
1638 * utf8 and raw dummy layers
1642 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1644 if (PerlIONext(f)) {
1646 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1647 PerlIO_pop(aTHX_ f);
1648 if (tab->kind & PERLIO_K_UTF8)
1649 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1651 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1657 PerlIO_funcs PerlIO_utf8 = {
1660 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1678 NULL, /* get_base */
1679 NULL, /* get_bufsiz */
1682 NULL, /* set_ptrcnt */
1685 PerlIO_funcs PerlIO_byte = {
1706 NULL, /* get_base */
1707 NULL, /* get_bufsiz */
1710 NULL, /* set_ptrcnt */
1714 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1715 IV n, const char *mode, int fd, int imode, int perm,
1716 PerlIO *old, int narg, SV **args)
1718 PerlIO_funcs *tab = PerlIO_default_btm();
1719 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1723 PerlIO_funcs PerlIO_raw = {
1744 NULL, /* get_base */
1745 NULL, /* get_bufsiz */
1748 NULL, /* set_ptrcnt */
1750 /*--------------------------------------------------------------------------------------*/
1751 /*--------------------------------------------------------------------------------------*/
1753 * "Methods" of the "base class"
1757 PerlIOBase_fileno(PerlIO *f)
1759 return PerlIO_fileno(PerlIONext(f));
1763 PerlIO_modestr(PerlIO *f, char *buf)
1766 IV flags = PerlIOBase(f)->flags;
1767 if (flags & PERLIO_F_APPEND) {
1769 if (flags & PERLIO_F_CANREAD) {
1773 else if (flags & PERLIO_F_CANREAD) {
1775 if (flags & PERLIO_F_CANWRITE)
1778 else if (flags & PERLIO_F_CANWRITE) {
1780 if (flags & PERLIO_F_CANREAD) {
1784 #ifdef PERLIO_USING_CRLF
1785 if (!(flags & PERLIO_F_CRLF))
1793 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1795 PerlIOl *l = PerlIOBase(f);
1797 const char *omode = mode;
1800 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1801 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1802 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1803 if (tab->Set_ptrcnt != NULL)
1804 l->flags |= PERLIO_F_FASTGETS;
1806 if (*mode == '#' || *mode == 'I')
1810 l->flags |= PERLIO_F_CANREAD;
1813 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1816 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1819 SETERRNO(EINVAL, LIB$_INVARG);
1825 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1828 l->flags &= ~PERLIO_F_CRLF;
1831 l->flags |= PERLIO_F_CRLF;
1834 SETERRNO(EINVAL, LIB$_INVARG);
1841 l->flags |= l->next->flags &
1842 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1847 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1848 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1849 l->flags, PerlIO_modestr(f, temp));
1855 PerlIOBase_popped(PerlIO *f)
1861 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1865 * Save the position as current head considers it
1867 Off_t old = PerlIO_tell(f);
1869 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1870 PerlIOSelf(f, PerlIOBuf)->posn = old;
1871 done = PerlIOBuf_unread(f, vbuf, count);
1876 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1878 STDCHAR *buf = (STDCHAR *) vbuf;
1880 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1883 SSize_t avail = PerlIO_get_cnt(f);
1886 take = (count < avail) ? count : avail;
1888 STDCHAR *ptr = PerlIO_get_ptr(f);
1889 Copy(ptr, buf, take, STDCHAR);
1890 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1894 if (count > 0 && avail <= 0) {
1895 if (PerlIO_fill(f) != 0)
1899 return (buf - (STDCHAR *) vbuf);
1905 PerlIOBase_noop_ok(PerlIO *f)
1911 PerlIOBase_noop_fail(PerlIO *f)
1917 PerlIOBase_close(PerlIO *f)
1920 PerlIO *n = PerlIONext(f);
1921 if (PerlIO_flush(f) != 0)
1923 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1925 PerlIOBase(f)->flags &=
1926 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1931 PerlIOBase_eof(PerlIO *f)
1934 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1940 PerlIOBase_error(PerlIO *f)
1943 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1949 PerlIOBase_clearerr(PerlIO *f)
1952 PerlIO *n = PerlIONext(f);
1953 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1960 PerlIOBase_setlinebuf(PerlIO *f)
1963 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1968 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1974 return sv_dup(arg, param);
1977 return newSVsv(arg);
1980 return newSVsv(arg);
1985 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1987 PerlIO *nexto = PerlIONext(o);
1989 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1990 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
1993 PerlIO_funcs *self = PerlIOBase(o)->tab;
1996 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
1997 self->name, (void*)f, (void*)o, (void*)param);
1999 arg = (*self->Getarg)(aTHX_ o,param,flags);
2001 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2009 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2011 perl_mutex PerlIO_mutex;
2013 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2018 /* Place holder for stdstreams call ??? */
2020 MUTEX_INIT(&PerlIO_mutex);
2025 PerlIOUnix_refcnt_inc(int fd)
2027 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2029 MUTEX_LOCK(&PerlIO_mutex);
2031 PerlIO_fd_refcnt[fd]++;
2032 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2034 MUTEX_UNLOCK(&PerlIO_mutex);
2040 PerlIOUnix_refcnt_dec(int fd)
2043 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2045 MUTEX_LOCK(&PerlIO_mutex);
2047 cnt = --PerlIO_fd_refcnt[fd];
2048 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2050 MUTEX_UNLOCK(&PerlIO_mutex);
2057 PerlIO_cleanup(pTHX)
2061 PerlIO_debug("Cleanup %p\n",aTHX);
2063 /* Raise STDIN..STDERR refcount so we don't close them */
2064 for (i=0; i < 3; i++)
2065 PerlIOUnix_refcnt_inc(i);
2066 PerlIO_cleantable(aTHX_ &PL_perlio);
2067 /* Restore STDIN..STDERR refcount */
2068 for (i=0; i < 3; i++)
2069 PerlIOUnix_refcnt_dec(i);
2074 /*--------------------------------------------------------------------------------------*/
2076 * Bottom-most level for UNIX-like case
2080 struct _PerlIO base; /* The generic part */
2081 int fd; /* UNIX like file descriptor */
2082 int oflags; /* open/fcntl flags */
2086 PerlIOUnix_oflags(const char *mode)
2089 if (*mode == 'I' || *mode == '#')
2094 if (*++mode == '+') {
2101 oflags = O_CREAT | O_TRUNC;
2102 if (*++mode == '+') {
2111 oflags = O_CREAT | O_APPEND;
2112 if (*++mode == '+') {
2125 else if (*mode == 't') {
2127 oflags &= ~O_BINARY;
2131 * Always open in binary mode
2134 if (*mode || oflags == -1) {
2135 SETERRNO(EINVAL, LIB$_INVARG);
2142 PerlIOUnix_fileno(PerlIO *f)
2144 return PerlIOSelf(f, PerlIOUnix)->fd;
2148 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2150 IV code = PerlIOBase_pushed(f, mode, arg);
2151 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2152 if (*PerlIONext(f)) {
2153 s->fd = PerlIO_fileno(PerlIONext(f));
2155 * XXX could (or should) we retrieve the oflags from the open file
2156 * handle rather than believing the "mode" we are passed in? XXX
2157 * Should the value on NULL mode be 0 or -1?
2159 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2161 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2166 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2167 IV n, const char *mode, int fd, int imode,
2168 int perm, PerlIO *f, int narg, SV **args)
2171 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2172 (*PerlIOBase(f)->tab->Close) (f);
2175 char *path = SvPV_nolen(*args);
2179 imode = PerlIOUnix_oflags(mode);
2183 fd = PerlLIO_open3(path, imode, perm);
2191 f = PerlIO_allocate(aTHX);
2192 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2196 s = PerlIOSelf(f, PerlIOUnix);
2199 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2200 PerlIOUnix_refcnt_inc(fd);
2206 * FIXME: pop layers ???
2214 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2216 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2218 if (flags & PERLIO_DUP_FD) {
2219 fd = PerlLIO_dup(fd);
2221 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2222 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2224 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2225 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2227 PerlIOUnix_refcnt_inc(fd);
2236 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2239 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2240 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2243 SSize_t len = PerlLIO_read(fd, vbuf, count);
2244 if (len >= 0 || errno != EINTR) {
2246 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2247 else if (len == 0 && count != 0)
2248 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2256 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2259 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2261 SSize_t len = PerlLIO_write(fd, vbuf, count);
2262 if (len >= 0 || errno != EINTR) {
2264 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2272 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2276 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2277 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2278 return (new == (Off_t) - 1) ? -1 : 0;
2282 PerlIOUnix_tell(PerlIO *f)
2285 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2290 PerlIOUnix_close(PerlIO *f)
2293 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2295 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2296 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2297 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2302 SETERRNO(EBADF,SS$_IVCHAN);
2305 while (PerlLIO_close(fd) != 0) {
2306 if (errno != EINTR) {
2313 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2318 PerlIO_funcs PerlIO_unix = {
2334 PerlIOBase_noop_ok, /* flush */
2335 PerlIOBase_noop_fail, /* fill */
2338 PerlIOBase_clearerr,
2339 PerlIOBase_setlinebuf,
2340 NULL, /* get_base */
2341 NULL, /* get_bufsiz */
2344 NULL, /* set_ptrcnt */
2347 /*--------------------------------------------------------------------------------------*/
2353 struct _PerlIO base;
2354 FILE *stdio; /* The stream */
2358 PerlIOStdio_fileno(PerlIO *f)
2361 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2365 PerlIOStdio_mode(const char *mode, char *tmode)
2371 #ifdef PERLIO_USING_CRLF
2379 * This isn't used yet ...
2382 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2384 if (*PerlIONext(f)) {
2386 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2389 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2390 PerlIOStdio_mode(mode, tmode));
2396 return PerlIOBase_pushed(f, mode, arg);
2399 #undef PerlIO_importFILE
2401 PerlIO_importFILE(FILE *stdio, int fl)
2407 PerlIOSelf(PerlIO_push
2408 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2409 "r+", Nullsv), PerlIOStdio);
2416 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2417 IV n, const char *mode, int fd, int imode,
2418 int perm, PerlIO *f, int narg, SV **args)
2422 char *path = SvPV_nolen(*args);
2423 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2425 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2426 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2431 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2436 char *path = SvPV_nolen(*args);
2439 fd = PerlLIO_open3(path, imode, perm);
2442 FILE *stdio = PerlSIO_fopen(path, mode);
2445 PerlIOSelf(PerlIO_push
2446 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2447 (mode = PerlIOStdio_mode(mode, tmode)),
2451 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2466 stdio = PerlSIO_stdin;
2469 stdio = PerlSIO_stdout;
2472 stdio = PerlSIO_stderr;
2477 stdio = PerlSIO_fdopen(fd, mode =
2478 PerlIOStdio_mode(mode, tmode));
2482 PerlIOSelf(PerlIO_push
2483 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2484 mode, PerlIOArg), PerlIOStdio);
2486 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2495 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2497 /* This assumes no layers underneath - which is what
2498 happens, but is not how I remember it. NI-S 2001/10/16
2500 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2501 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2502 if (flags & PERLIO_DUP_FD) {
2503 int fd = PerlLIO_dup(fileno(stdio));
2506 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2509 /* FIXME: To avoid messy error recovery if dup fails
2510 re-use the existing stdio as though flag was not set
2514 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2515 PerlIOUnix_refcnt_inc(fileno(stdio));
2521 PerlIOStdio_close(PerlIO *f)
2524 #ifdef SOCKS5_VERSION_NAME
2526 Sock_size_t optlen = sizeof(int);
2528 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2529 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2530 /* Do not close it but do flush any buffers */
2535 #ifdef SOCKS5_VERSION_NAME
2537 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2539 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2541 PerlSIO_fclose(stdio)
2550 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2553 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2556 STDCHAR *buf = (STDCHAR *) vbuf;
2558 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2559 * stdio does not do that for fread()
2561 int ch = PerlSIO_fgetc(s);
2568 got = PerlSIO_fread(vbuf, 1, count, s);
2573 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2576 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2577 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2580 int ch = *buf-- & 0xff;
2581 if (PerlSIO_ungetc(ch, s) != ch)
2590 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2593 return PerlSIO_fwrite(vbuf, 1, count,
2594 PerlIOSelf(f, PerlIOStdio)->stdio);
2598 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2601 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2602 return PerlSIO_fseek(stdio, offset, whence);
2606 PerlIOStdio_tell(PerlIO *f)
2609 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2610 return PerlSIO_ftell(stdio);
2614 PerlIOStdio_flush(PerlIO *f)
2617 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2618 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2619 return PerlSIO_fflush(stdio);
2624 * FIXME: This discards ungetc() and pre-read stuff which is not
2625 * right if this is just a "sync" from a layer above Suspect right
2626 * design is to do _this_ but not have layer above flush this
2627 * layer read-to-read
2630 * Not writeable - sync by attempting a seek
2633 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2641 PerlIOStdio_fill(PerlIO *f)
2644 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2647 * fflush()ing read-only streams can cause trouble on some stdio-s
2649 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2650 if (PerlSIO_fflush(stdio) != 0)
2653 c = PerlSIO_fgetc(stdio);
2654 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2660 PerlIOStdio_eof(PerlIO *f)
2663 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2667 PerlIOStdio_error(PerlIO *f)
2670 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2674 PerlIOStdio_clearerr(PerlIO *f)
2677 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2681 PerlIOStdio_setlinebuf(PerlIO *f)
2684 #ifdef HAS_SETLINEBUF
2685 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2687 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2693 PerlIOStdio_get_base(PerlIO *f)
2696 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2697 return (STDCHAR*)PerlSIO_get_base(stdio);
2701 PerlIOStdio_get_bufsiz(PerlIO *f)
2704 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2705 return PerlSIO_get_bufsiz(stdio);
2709 #ifdef USE_STDIO_PTR
2711 PerlIOStdio_get_ptr(PerlIO *f)
2714 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2715 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2719 PerlIOStdio_get_cnt(PerlIO *f)
2722 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2723 return PerlSIO_get_cnt(stdio);
2727 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2729 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2732 #ifdef STDIO_PTR_LVALUE
2733 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2734 #ifdef STDIO_PTR_LVAL_SETS_CNT
2735 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2737 assert(PerlSIO_get_cnt(stdio) == (cnt));
2740 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2742 * Setting ptr _does_ change cnt - we are done
2746 #else /* STDIO_PTR_LVALUE */
2748 #endif /* STDIO_PTR_LVALUE */
2751 * Now (or only) set cnt
2753 #ifdef STDIO_CNT_LVALUE
2754 PerlSIO_set_cnt(stdio, cnt);
2755 #else /* STDIO_CNT_LVALUE */
2756 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2757 PerlSIO_set_ptr(stdio,
2758 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2760 #else /* STDIO_PTR_LVAL_SETS_CNT */
2762 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2763 #endif /* STDIO_CNT_LVALUE */
2768 PerlIO_funcs PerlIO_stdio = {
2770 sizeof(PerlIOStdio),
2788 PerlIOStdio_clearerr,
2789 PerlIOStdio_setlinebuf,
2791 PerlIOStdio_get_base,
2792 PerlIOStdio_get_bufsiz,
2797 #ifdef USE_STDIO_PTR
2798 PerlIOStdio_get_ptr,
2799 PerlIOStdio_get_cnt,
2800 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2801 PerlIOStdio_set_ptrcnt
2802 #else /* STDIO_PTR_LVALUE */
2804 #endif /* STDIO_PTR_LVALUE */
2805 #else /* USE_STDIO_PTR */
2809 #endif /* USE_STDIO_PTR */
2812 #undef PerlIO_exportFILE
2814 PerlIO_exportFILE(PerlIO *f, int fl)
2818 stdio = fdopen(PerlIO_fileno(f), "r+");
2822 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2829 #undef PerlIO_findFILE
2831 PerlIO_findFILE(PerlIO *f)
2835 if (l->tab == &PerlIO_stdio) {
2836 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2839 l = *PerlIONext(&l);
2841 return PerlIO_exportFILE(f, 0);
2844 #undef PerlIO_releaseFILE
2846 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2850 /*--------------------------------------------------------------------------------------*/
2852 * perlio buffer layer
2856 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2859 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2860 int fd = PerlIO_fileno(f);
2862 if (fd >= 0 && PerlLIO_isatty(fd)) {
2863 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2865 posn = PerlIO_tell(PerlIONext(f));
2866 if (posn != (Off_t) - 1) {
2869 return PerlIOBase_pushed(f, mode, arg);
2873 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2874 IV n, const char *mode, int fd, int imode, int perm,
2875 PerlIO *f, int narg, SV **args)
2878 PerlIO *next = PerlIONext(f);
2880 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2882 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2885 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2891 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2899 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2902 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2904 * if push fails during open, open fails. close will pop us.
2909 fd = PerlIO_fileno(f);
2910 #ifdef PERLIO_USING_CRLF
2912 * do something about failing setmode()? --jhi
2914 PerlLIO_setmode(fd, O_BINARY);
2916 if (init && fd == 2) {
2918 * Initial stderr is unbuffered
2920 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2929 * This "flush" is akin to sfio's sync in that it handles files in either
2930 * read or write state
2933 PerlIOBuf_flush(PerlIO *f)
2935 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2937 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2939 * write() the buffer
2941 STDCHAR *buf = b->buf;
2943 PerlIO *n = PerlIONext(f);
2944 while (p < b->ptr) {
2945 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2949 else if (count < 0 || PerlIO_error(n)) {
2950 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2955 b->posn += (p - buf);
2957 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2958 STDCHAR *buf = PerlIO_get_base(f);
2960 * Note position change
2962 b->posn += (b->ptr - buf);
2963 if (b->ptr < b->end) {
2965 * We did not consume all of it
2967 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2968 b->posn = PerlIO_tell(PerlIONext(f));
2972 b->ptr = b->end = b->buf;
2973 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2975 * FIXME: Is this right for read case ?
2977 if (PerlIO_flush(PerlIONext(f)) != 0)
2983 PerlIOBuf_fill(PerlIO *f)
2985 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2986 PerlIO *n = PerlIONext(f);
2989 * FIXME: doing the down-stream flush is a bad idea if it causes
2990 * pre-read data in stdio buffer to be discarded but this is too
2991 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2992 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2994 if (PerlIO_flush(f) != 0)
2996 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2997 PerlIOBase_flush_linebuf();
3000 PerlIO_get_base(f); /* allocate via vtable */
3002 b->ptr = b->end = b->buf;
3003 if (PerlIO_fast_gets(n)) {
3005 * Layer below is also buffered We do _NOT_ want to call its
3006 * ->Read() because that will loop till it gets what we asked for
3007 * which may hang on a pipe etc. Instead take anything it has to
3008 * hand, or ask it to fill _once_.
3010 avail = PerlIO_get_cnt(n);
3012 avail = PerlIO_fill(n);
3014 avail = PerlIO_get_cnt(n);
3016 if (!PerlIO_error(n) && PerlIO_eof(n))
3021 STDCHAR *ptr = PerlIO_get_ptr(n);
3022 SSize_t cnt = avail;
3023 if (avail > b->bufsiz)
3025 Copy(ptr, b->buf, avail, STDCHAR);
3026 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3030 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3034 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3036 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3039 b->end = b->buf + avail;
3040 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3045 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3047 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3051 return PerlIOBase_read(f, vbuf, count);
3057 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3059 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3060 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3063 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3068 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3070 * Buffer is already a read buffer, we can overwrite any chars
3071 * which have been read back to buffer start
3073 avail = (b->ptr - b->buf);
3077 * Buffer is idle, set it up so whole buffer is available for
3081 b->end = b->buf + avail;
3083 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3085 * Buffer extends _back_ from where we are now
3087 b->posn -= b->bufsiz;
3089 if (avail > (SSize_t) count) {
3091 * If we have space for more than count, just move count
3099 * In simple stdio-like ungetc() case chars will be already
3102 if (buf != b->ptr) {
3103 Copy(buf, b->ptr, avail, STDCHAR);
3107 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3114 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3116 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3117 const STDCHAR *buf = (const STDCHAR *) vbuf;
3121 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3124 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3125 if ((SSize_t) count < avail)
3127 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3128 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3143 Copy(buf, b->ptr, avail, STDCHAR);
3150 if (b->ptr >= (b->buf + b->bufsiz))
3153 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3159 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3162 if ((code = PerlIO_flush(f)) == 0) {
3163 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3164 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3165 code = PerlIO_seek(PerlIONext(f), offset, whence);
3167 b->posn = PerlIO_tell(PerlIONext(f));
3174 PerlIOBuf_tell(PerlIO *f)
3176 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3178 * b->posn is file position where b->buf was read, or will be written
3180 Off_t posn = b->posn;
3183 * If buffer is valid adjust position by amount in buffer
3185 posn += (b->ptr - b->buf);
3191 PerlIOBuf_close(PerlIO *f)
3193 IV code = PerlIOBase_close(f);
3194 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3195 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3199 b->ptr = b->end = b->buf;
3200 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3205 PerlIOBuf_get_ptr(PerlIO *f)
3207 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3214 PerlIOBuf_get_cnt(PerlIO *f)
3216 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3219 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3220 return (b->end - b->ptr);
3225 PerlIOBuf_get_base(PerlIO *f)
3227 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3232 Newz('B',b->buf,b->bufsiz, STDCHAR);
3234 b->buf = (STDCHAR *) & b->oneword;
3235 b->bufsiz = sizeof(b->oneword);
3244 PerlIOBuf_bufsiz(PerlIO *f)
3246 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3249 return (b->end - b->buf);
3253 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3255 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3259 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3261 assert(PerlIO_get_cnt(f) == cnt);
3262 assert(b->ptr >= b->buf);
3264 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3268 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3270 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3275 PerlIO_funcs PerlIO_perlio = {
3295 PerlIOBase_clearerr,
3296 PerlIOBase_setlinebuf,
3301 PerlIOBuf_set_ptrcnt,
3304 /*--------------------------------------------------------------------------------------*/
3306 * Temp layer to hold unread chars when cannot do it any other way
3310 PerlIOPending_fill(PerlIO *f)
3313 * Should never happen
3320 PerlIOPending_close(PerlIO *f)
3323 * A tad tricky - flush pops us, then we close new top
3326 return PerlIO_close(f);
3330 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3333 * A tad tricky - flush pops us, then we seek new top
3336 return PerlIO_seek(f, offset, whence);
3341 PerlIOPending_flush(PerlIO *f)
3344 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3345 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3349 PerlIO_pop(aTHX_ f);
3354 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3360 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3365 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3367 IV code = PerlIOBase_pushed(f, mode, arg);
3368 PerlIOl *l = PerlIOBase(f);
3370 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3371 * etc. get muddled when it changes mid-string when we auto-pop.
3373 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3374 (PerlIOBase(PerlIONext(f))->
3375 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3380 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3382 SSize_t avail = PerlIO_get_cnt(f);
3387 got = PerlIOBuf_read(f, vbuf, avail);
3388 if (got >= 0 && got < count) {
3390 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3391 if (more >= 0 || got == 0)
3397 PerlIO_funcs PerlIO_pending = {
3401 PerlIOPending_pushed,
3412 PerlIOPending_close,
3413 PerlIOPending_flush,
3417 PerlIOBase_clearerr,
3418 PerlIOBase_setlinebuf,
3423 PerlIOPending_set_ptrcnt,
3428 /*--------------------------------------------------------------------------------------*/
3430 * crlf - translation On read translate CR,LF to "\n" we do this by
3431 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3432 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3436 PerlIOBuf base; /* PerlIOBuf stuff */
3437 STDCHAR *nl; /* Position of crlf we "lied" about in the
3442 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3445 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3446 code = PerlIOBuf_pushed(f, mode, arg);
3448 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3449 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3450 PerlIOBase(f)->flags);
3457 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3459 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3464 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3465 return PerlIOBuf_unread(f, vbuf, count);
3467 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3468 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3470 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3475 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3476 b->end = b->ptr = b->buf + b->bufsiz;
3477 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3478 b->posn -= b->bufsiz;
3480 while (count > 0 && b->ptr > b->buf) {
3483 if (b->ptr - 2 >= b->buf) {
3506 PerlIOCrlf_get_cnt(PerlIO *f)
3508 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3511 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3512 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3513 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3514 STDCHAR *nl = b->ptr;
3516 while (nl < b->end && *nl != 0xd)
3518 if (nl < b->end && *nl == 0xd) {
3520 if (nl + 1 < b->end) {
3527 * Not CR,LF but just CR
3535 * Blast - found CR as last char in buffer
3539 * They may not care, defer work as long as
3542 return (nl - b->ptr);
3546 b->ptr++; /* say we have read it as far as
3547 * flush() is concerned */
3548 b->buf++; /* Leave space in front of buffer */
3549 b->bufsiz--; /* Buffer is thus smaller */
3550 code = PerlIO_fill(f); /* Fetch some more */
3551 b->bufsiz++; /* Restore size for next time */
3552 b->buf--; /* Point at space */
3553 b->ptr = nl = b->buf; /* Which is what we hand
3555 b->posn--; /* Buffer starts here */
3556 *nl = 0xd; /* Fill in the CR */
3558 goto test; /* fill() call worked */
3560 * CR at EOF - just fall through
3566 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3572 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3574 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3575 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3576 IV flags = PerlIOBase(f)->flags;
3584 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3591 * Test code - delete when it works ...
3598 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3605 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3606 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3613 * They have taken what we lied about
3621 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3625 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3627 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3628 return PerlIOBuf_write(f, vbuf, count);
3630 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3631 const STDCHAR *buf = (const STDCHAR *) vbuf;
3632 const STDCHAR *ebuf = buf + count;
3635 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3637 while (buf < ebuf) {
3638 STDCHAR *eptr = b->buf + b->bufsiz;
3639 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3640 while (buf < ebuf && b->ptr < eptr) {
3642 if ((b->ptr + 2) > eptr) {
3650 *(b->ptr)++ = 0xd; /* CR */
3651 *(b->ptr)++ = 0xa; /* LF */
3653 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3663 if (b->ptr >= eptr) {
3669 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3671 return (buf - (STDCHAR *) vbuf);
3676 PerlIOCrlf_flush(PerlIO *f)
3678 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3683 return PerlIOBuf_flush(f);
3686 PerlIO_funcs PerlIO_crlf = {
3689 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3691 PerlIOBase_noop_ok, /* popped */
3696 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3698 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3699 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3707 PerlIOBase_clearerr,
3708 PerlIOBase_setlinebuf,
3713 PerlIOCrlf_set_ptrcnt,
3717 /*--------------------------------------------------------------------------------------*/
3719 * mmap as "buffer" layer
3723 PerlIOBuf base; /* PerlIOBuf stuff */
3724 Mmap_t mptr; /* Mapped address */
3725 Size_t len; /* mapped length */
3726 STDCHAR *bbuf; /* malloced buffer if map fails */
3729 static size_t page_size = 0;
3732 PerlIOMmap_map(PerlIO *f)
3735 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3736 IV flags = PerlIOBase(f)->flags;
3740 if (flags & PERLIO_F_CANREAD) {
3741 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3742 int fd = PerlIO_fileno(f);
3744 code = Fstat(fd, &st);
3745 if (code == 0 && S_ISREG(st.st_mode)) {
3746 SSize_t len = st.st_size - b->posn;
3750 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3752 SETERRNO(0, SS$_NORMAL);
3753 # ifdef _SC_PAGESIZE
3754 page_size = sysconf(_SC_PAGESIZE);
3756 page_size = sysconf(_SC_PAGE_SIZE);
3758 if ((long) page_size < 0) {
3763 (void) SvUPGRADE(error, SVt_PV);
3764 msg = SvPVx(error, n_a);
3765 Perl_croak(aTHX_ "panic: sysconf: %s",
3770 "panic: sysconf: pagesize unknown");
3774 # ifdef HAS_GETPAGESIZE
3775 page_size = getpagesize();
3777 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3778 page_size = PAGESIZE; /* compiletime, bad */
3782 if ((IV) page_size <= 0)
3783 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3788 * This is a hack - should never happen - open should
3791 b->posn = PerlIO_tell(PerlIONext(f));
3793 posn = (b->posn / page_size) * page_size;
3794 len = st.st_size - posn;
3795 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3796 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3797 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3798 madvise(m->mptr, len, MADV_SEQUENTIAL);
3800 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3801 madvise(m->mptr, len, MADV_WILLNEED);
3803 PerlIOBase(f)->flags =
3804 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3805 b->end = ((STDCHAR *) m->mptr) + len;
3806 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3815 PerlIOBase(f)->flags =
3816 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3818 b->ptr = b->end = b->ptr;
3827 PerlIOMmap_unmap(PerlIO *f)
3829 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3830 PerlIOBuf *b = &m->base;
3834 code = munmap(m->mptr, m->len);
3838 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3841 b->ptr = b->end = b->buf;
3842 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3848 PerlIOMmap_get_base(PerlIO *f)
3850 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3851 PerlIOBuf *b = &m->base;
3852 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3854 * Already have a readbuffer in progress
3860 * We have a write buffer or flushed PerlIOBuf read buffer
3862 m->bbuf = b->buf; /* save it in case we need it again */
3863 b->buf = NULL; /* Clear to trigger below */
3866 PerlIOMmap_map(f); /* Try and map it */
3869 * Map did not work - recover PerlIOBuf buffer if we have one
3874 b->ptr = b->end = b->buf;
3877 return PerlIOBuf_get_base(f);
3881 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3883 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3884 PerlIOBuf *b = &m->base;
3885 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3887 if (b->ptr && (b->ptr - count) >= b->buf
3888 && memEQ(b->ptr - count, vbuf, count)) {
3890 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3895 * Loose the unwritable mapped buffer
3899 * If flush took the "buffer" see if we have one from before
3901 if (!b->buf && m->bbuf)
3904 PerlIOBuf_get_base(f);
3908 return PerlIOBuf_unread(f, vbuf, count);
3912 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3914 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3915 PerlIOBuf *b = &m->base;
3916 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3918 * No, or wrong sort of, buffer
3921 if (PerlIOMmap_unmap(f) != 0)
3925 * If unmap took the "buffer" see if we have one from before
3927 if (!b->buf && m->bbuf)
3930 PerlIOBuf_get_base(f);
3934 return PerlIOBuf_write(f, vbuf, count);
3938 PerlIOMmap_flush(PerlIO *f)
3940 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3941 PerlIOBuf *b = &m->base;
3942 IV code = PerlIOBuf_flush(f);
3944 * Now we are "synced" at PerlIOBuf level
3951 if (PerlIOMmap_unmap(f) != 0)
3956 * We seem to have a PerlIOBuf buffer which was not mapped
3957 * remember it in case we need one later
3966 PerlIOMmap_fill(PerlIO *f)
3968 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3969 IV code = PerlIO_flush(f);
3970 if (code == 0 && !b->buf) {
3971 code = PerlIOMmap_map(f);
3973 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3974 code = PerlIOBuf_fill(f);
3980 PerlIOMmap_close(PerlIO *f)
3982 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3983 PerlIOBuf *b = &m->base;
3984 IV code = PerlIO_flush(f);
3988 b->ptr = b->end = b->buf;
3990 if (PerlIOBuf_close(f) != 0)
3996 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3998 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4002 PerlIO_funcs PerlIO_mmap = {
4022 PerlIOBase_clearerr,
4023 PerlIOBase_setlinebuf,
4024 PerlIOMmap_get_base,
4028 PerlIOBuf_set_ptrcnt,
4031 #endif /* HAS_MMAP */
4039 PerlIO_stdstreams(aTHX);
4041 return &PL_perlio[1];
4044 #undef PerlIO_stdout
4050 PerlIO_stdstreams(aTHX);
4052 return &PL_perlio[2];
4055 #undef PerlIO_stderr
4061 PerlIO_stdstreams(aTHX);
4063 return &PL_perlio[3];
4066 /*--------------------------------------------------------------------------------------*/
4068 #undef PerlIO_getname
4070 PerlIO_getname(PerlIO *f, char *buf)
4075 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4077 name = fgetname(stdio, buf);
4079 Perl_croak(aTHX_ "Don't know how to get file name");
4085 /*--------------------------------------------------------------------------------------*/
4087 * Functions which can be called on any kind of PerlIO implemented in
4093 PerlIO_getc(PerlIO *f)
4096 SSize_t count = PerlIO_read(f, buf, 1);
4098 return (unsigned char) buf[0];
4103 #undef PerlIO_ungetc
4105 PerlIO_ungetc(PerlIO *f, int ch)
4109 if (PerlIO_unread(f, &buf, 1) == 1)
4117 PerlIO_putc(PerlIO *f, int ch)
4120 return PerlIO_write(f, &buf, 1);
4125 PerlIO_puts(PerlIO *f, const char *s)
4127 STRLEN len = strlen(s);
4128 return PerlIO_write(f, s, len);
4131 #undef PerlIO_rewind
4133 PerlIO_rewind(PerlIO *f)
4135 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4139 #undef PerlIO_vprintf
4141 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4144 SV *sv = newSVpvn("", 0);
4150 Perl_va_copy(ap, apc);
4151 sv_vcatpvf(sv, fmt, &apc);
4153 sv_vcatpvf(sv, fmt, &ap);
4156 wrote = PerlIO_write(f, s, len);
4161 #undef PerlIO_printf
4163 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4168 result = PerlIO_vprintf(f, fmt, ap);
4173 #undef PerlIO_stdoutf
4175 PerlIO_stdoutf(const char *fmt, ...)
4180 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4185 #undef PerlIO_tmpfile
4187 PerlIO_tmpfile(void)
4190 * I have no idea how portable mkstemp() is ...
4192 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4195 FILE *stdio = PerlSIO_tmpfile();
4198 PerlIOSelf(PerlIO_push
4199 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4200 "w+", Nullsv), PerlIOStdio);
4206 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4207 int fd = mkstemp(SvPVX(sv));
4210 f = PerlIO_fdopen(fd, "w+");
4212 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4214 PerlLIO_unlink(SvPVX(sv));
4224 #endif /* USE_SFIO */
4225 #endif /* PERLIO_IS_STDIO */
4227 /*======================================================================================*/
4229 * Now some functions in terms of above which may be needed even if we are
4230 * not in true PerlIO mode
4234 #undef PerlIO_setpos
4236 PerlIO_setpos(PerlIO *f, SV *pos)
4241 Off_t *posn = (Off_t *) SvPV(pos, len);
4242 if (f && len == sizeof(Off_t))
4243 return PerlIO_seek(f, *posn, SEEK_SET);
4245 SETERRNO(EINVAL, SS$_IVCHAN);
4249 #undef PerlIO_setpos
4251 PerlIO_setpos(PerlIO *f, SV *pos)
4256 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4257 if (f && len == sizeof(Fpos_t)) {
4258 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4259 return fsetpos64(f, fpos);
4261 return fsetpos(f, fpos);
4265 SETERRNO(EINVAL, SS$_IVCHAN);
4271 #undef PerlIO_getpos
4273 PerlIO_getpos(PerlIO *f, SV *pos)
4276 Off_t posn = PerlIO_tell(f);
4277 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4278 return (posn == (Off_t) - 1) ? -1 : 0;
4281 #undef PerlIO_getpos
4283 PerlIO_getpos(PerlIO *f, SV *pos)
4288 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4289 code = fgetpos64(f, &fpos);
4291 code = fgetpos(f, &fpos);
4293 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4298 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4301 vprintf(char *pat, char *args)
4303 _doprnt(pat, args, stdout);
4304 return 0; /* wrong, but perl doesn't use the return
4309 vfprintf(FILE *fd, char *pat, char *args)
4311 _doprnt(pat, args, fd);
4312 return 0; /* wrong, but perl doesn't use the return
4318 #ifndef PerlIO_vsprintf
4320 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4322 int val = vsprintf(s, fmt, ap);
4324 if (strlen(s) >= (STRLEN) n) {
4326 (void) PerlIO_puts(Perl_error_log,
4327 "panic: sprintf overflow - memory corrupted!\n");
4335 #ifndef PerlIO_sprintf
4337 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4342 result = PerlIO_vsprintf(s, n, fmt, ap);