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
44 perlsio_binmode(FILE *fp, int iotype, int mode)
47 * This used to be contents of do_binmode in doio.c
50 # if defined(atarist) || defined(__MINT__)
53 ((FILE *) fp)->_flag |= _IOBIN;
55 ((FILE *) fp)->_flag &= ~_IOBIN;
62 if (PerlLIO_setmode(fp, mode) != -1) {
64 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
66 # if defined(WIN32) && defined(__BORLANDC__)
68 * The translation mode of the stream is maintained independent of
69 * the translation mode of the fd in the Borland RTL (heavy
70 * digging through their runtime sources reveal). User has to set
71 * the mode explicitly for the stream (though they don't document
72 * this anywhere). GSAR 97-5-24
86 # if defined(USEMYBINMODE)
87 if (my_binmode(fp, iotype, mode) != FALSE)
98 #define O_ACCMODE 3 /* Assume traditional implementation */
102 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
104 int result = rawmode & O_ACCMODE;
109 ptype = IoTYPE_RDONLY;
112 ptype = IoTYPE_WRONLY;
120 *writing = (result != O_RDONLY);
122 if (result == O_RDONLY) {
126 else if (rawmode & O_APPEND) {
128 if (result != O_WRONLY)
133 if (result == O_WRONLY)
140 if (rawmode & O_BINARY)
146 #ifndef PERLIO_LAYERS
148 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
150 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
153 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
161 PerlIO_destruct(pTHX)
166 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
171 return perlsio_binmode(fp, iotype, mode);
176 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
179 int fd = PerlLIO_dup(PerlIO_fileno(f));
182 int omode = fcntl(fd, F_GETFL);
183 PerlIO_intmode2str(omode,mode,NULL);
184 /* the r+ is a hack */
185 return PerlIO_fdopen(fd, mode);
190 SETERRNO(EBADF, SS$_IVCHAN);
197 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
201 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
202 int imode, int perm, PerlIO *old, int narg, SV **args)
205 if (*args == &PL_sv_undef)
206 return PerlIO_tmpfile();
208 char *name = SvPV_nolen(*args);
210 fd = PerlLIO_open3(name, imode, perm);
212 return PerlIO_fdopen(fd, (char *) mode + 1);
215 return PerlIO_reopen(name, mode, old);
218 return PerlIO_open(name, mode);
223 return PerlIO_fdopen(fd, (char *) mode);
228 XS(XS_PerlIO__Layer__find)
232 Perl_croak(aTHX_ "Usage class->find(name[,load])");
234 char *name = SvPV_nolen(ST(1));
235 ST(0) = (strEQ(name, "crlf")
236 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
243 Perl_boot_core_PerlIO(pTHX)
245 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
251 #ifdef PERLIO_IS_STDIO
257 * Does nothing (yet) except force this file to be included in perl
258 * binary. That allows this file to force inclusion of other functions
259 * that may be required by loadable extensions e.g. for
260 * FileHandle::tmpfile
264 #undef PerlIO_tmpfile
271 #else /* PERLIO_IS_STDIO */
279 * This section is just to make sure these functions get pulled in from
283 #undef PerlIO_tmpfile
294 * Force this file to be included in perl binary. Which allows this
295 * file to force inclusion of other functions that may be required by
296 * loadable extensions e.g. for FileHandle::tmpfile
300 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
301 * results in a lot of lseek()s to regular files and lot of small
304 sfset(sfstdout, SF_SHARE, 0);
308 PerlIO_importFILE(FILE *stdio, int fl)
310 int fd = fileno(stdio);
311 PerlIO *r = PerlIO_fdopen(fd, "r+");
316 PerlIO_findFILE(PerlIO *pio)
318 int fd = PerlIO_fileno(pio);
319 FILE *f = fdopen(fd, "r+");
321 if (!f && errno == EINVAL)
323 if (!f && errno == EINVAL)
330 /*======================================================================================*/
332 * Implement all the PerlIO interface ourselves.
338 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
345 #include <sys/mman.h>
349 void PerlIO_debug(const char *fmt, ...)
350 __attribute__ ((format(__printf__, 1, 2)));
353 PerlIO_debug(const char *fmt, ...)
360 char *s = PerlEnv_getenv("PERLIO_DEBUG");
362 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
369 /* Use fixed buffer as sv_catpvf etc. needs SVs */
373 s = CopFILE(PL_curcop);
376 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
377 len = strlen(buffer);
378 vsprintf(buffer+len, fmt, ap);
379 PerlLIO_write(dbg, buffer, strlen(buffer));
381 SV *sv = newSVpvn("", 0);
384 s = CopFILE(PL_curcop);
387 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
388 (IV) CopLINE(PL_curcop));
389 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
392 PerlLIO_write(dbg, s, len);
399 /*--------------------------------------------------------------------------------------*/
402 * Inner level routines
406 * Table of pointers to the PerlIO structs (malloc'ed)
408 #define PERLIO_TABLE_SIZE 64
411 PerlIO_allocate(pTHX)
414 * Find a free slot in the table, allocating new table as necessary
419 while ((f = *last)) {
421 last = (PerlIO **) (f);
422 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
428 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
436 #undef PerlIO_fdupopen
438 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
441 PerlIO_funcs *tab = PerlIOBase(f)->tab;
443 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
444 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
448 SETERRNO(EBADF, SS$_IVCHAN);
454 PerlIO_clone(pTHX_ PerlIO *proto, CLONE_PARAMS *param)
456 PerlIO **table = &proto;
459 PerlIO_allocate(aTHX); /* root slot is never used */
460 while ((f = *table)) {
462 table = (PerlIO **) (f++);
463 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
465 PerlIO_fdupopen(aTHX_ f, param);
473 PerlIO_cleantable(pTHX_ PerlIO **tablep)
475 PerlIO *table = *tablep;
478 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
479 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
480 PerlIO *f = table + i;
485 PerlMemShared_free(table);
490 PerlIO_list_t *PerlIO_known_layers;
491 PerlIO_list_t *PerlIO_def_layerlist;
494 PerlIO_list_alloc(void)
497 Newz('L', list, 1, PerlIO_list_t);
503 PerlIO_list_free(PerlIO_list_t *list)
506 if (--list->refcnt == 0) {
510 for (i = 0; i < list->cur; i++) {
511 if (list->array[i].arg)
512 SvREFCNT_dec(list->array[i].arg);
514 Safefree(list->array);
522 PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
526 if (list->cur >= list->len) {
529 Renew(list->array, list->len, PerlIO_pair_t);
531 New('l', list->array, list->len, PerlIO_pair_t);
533 p = &(list->array[list->cur++]);
535 if ((p->arg = arg)) {
542 PerlIO_cleanup_layers(pTHX_ void *data)
545 PerlIO_known_layers = Nullhv;
546 PerlIO_def_layerlist = Nullav;
554 PerlIO_cleantable(aTHX_ &PL_perlio);
558 PerlIO_destruct(pTHX)
560 PerlIO **table = &PL_perlio;
562 while ((f = *table)) {
564 table = (PerlIO **) (f++);
565 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
569 if (l->tab->kind & PERLIO_K_DESTRUCT) {
570 PerlIO_debug("Destruct popping %s\n", l->tab->name);
584 PerlIO_pop(pTHX_ PerlIO *f)
588 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
589 if (l->tab->Popped) {
591 * If popped returns non-zero do not free its layer structure
592 * it has either done so itself, or it is shared and still in
595 if ((*l->tab->Popped) (f) != 0)
599 PerlMemShared_free(l);
603 /*--------------------------------------------------------------------------------------*/
605 * XS Interface for perl code
609 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
612 if ((SSize_t) len <= 0)
614 for (i = 0; i < PerlIO_known_layers->cur; i++) {
615 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
616 if (memEQ(f->name, name, len)) {
617 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
621 if (load && PL_subname && PerlIO_def_layerlist
622 && PerlIO_def_layerlist->cur >= 2) {
623 SV *pkgsv = newSVpvn("PerlIO", 6);
624 SV *layer = newSVpvn(name, len);
627 * The two SVs are magically freed by load_module
629 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
631 return PerlIO_find_layer(aTHX_ name, len, 0);
633 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
637 #ifdef USE_ATTRIBUTES_FOR_PERLIO
640 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
643 IO *io = GvIOn((GV *) SvRV(sv));
644 PerlIO *ifp = IoIFP(io);
645 PerlIO *ofp = IoOFP(io);
646 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
652 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
655 IO *io = GvIOn((GV *) SvRV(sv));
656 PerlIO *ifp = IoIFP(io);
657 PerlIO *ofp = IoOFP(io);
658 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
664 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
666 Perl_warn(aTHX_ "clear %" SVf, sv);
671 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
673 Perl_warn(aTHX_ "free %" SVf, sv);
677 MGVTBL perlio_vtab = {
685 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
688 SV *sv = SvRV(ST(1));
693 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
695 mg = mg_find(sv, PERL_MAGIC_ext);
696 mg->mg_virtual = &perlio_vtab;
698 Perl_warn(aTHX_ "attrib %" SVf, sv);
699 for (i = 2; i < items; i++) {
701 const char *name = SvPV(ST(i), len);
702 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
704 av_push(av, SvREFCNT_inc(layer));
715 #endif /* USE_ATTIBUTES_FOR_PERLIO */
718 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
720 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
721 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
725 XS(XS_PerlIO__Layer__find)
729 Perl_croak(aTHX_ "Usage class->find(name[,load])");
732 char *name = SvPV(ST(1), len);
733 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
734 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
736 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
743 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
745 if (!PerlIO_known_layers)
746 PerlIO_known_layers = PerlIO_list_alloc();
747 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
748 PerlIO_debug("define %s %p\n", tab->name, tab);
752 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
755 const char *s = names;
757 while (isSPACE(*s) || *s == ':')
762 const char *as = Nullch;
764 if (!isIDFIRST(*s)) {
766 * Message is consistent with how attribute lists are
767 * passed. Even though this means "foo : : bar" is
768 * seen as an invalid separator character.
770 char q = ((*s == '\'') ? '"' : '\'');
772 "perlio: invalid separator character %c%c%c in layer specification list",
778 } while (isALNUM(*e));
794 * It's a nul terminated string, not allowed
795 * to \ the terminating null. Anything other
796 * character is passed over.
807 "perlio: argument list not closed for layer \"%.*s\"",
819 PerlIO_funcs *layer =
820 PerlIO_find_layer(aTHX_ s, llen, 1);
822 PerlIO_list_push(av, layer,
828 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
841 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
843 PerlIO_funcs *tab = &PerlIO_perlio;
844 if (O_BINARY != O_TEXT) {
848 if (PerlIO_stdio.Set_ptrcnt) {
852 PerlIO_debug("Pushing %s\n", tab->name);
853 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
858 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
860 return av->array[n].arg;
864 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
866 if (n >= 0 && n < av->cur) {
867 PerlIO_debug("Layer %" IVdf " is %s\n", n,
868 av->array[n].funcs->name);
869 return av->array[n].funcs;
872 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
877 PerlIO_default_layers(pTHX)
879 if (!PerlIO_def_layerlist) {
880 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
881 PerlIO_funcs *osLayer = &PerlIO_unix;
882 PerlIO_def_layerlist = PerlIO_list_alloc();
883 PerlIO_define_layer(aTHX_ & PerlIO_unix);
884 #if defined(WIN32) && !defined(UNDER_CE)
885 PerlIO_define_layer(aTHX_ & PerlIO_win32);
887 osLayer = &PerlIO_win32;
890 PerlIO_define_layer(aTHX_ & PerlIO_raw);
891 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
892 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
893 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
895 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
897 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
898 PerlIO_define_layer(aTHX_ & PerlIO_byte);
899 PerlIO_list_push(PerlIO_def_layerlist,
900 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
903 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
906 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
909 if (PerlIO_def_layerlist->cur < 2) {
910 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
912 return PerlIO_def_layerlist;
916 Perl_boot_core_PerlIO(pTHX)
918 #ifdef USE_ATTRIBUTES_FOR_PERLIO
919 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
922 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
926 PerlIO_default_layer(pTHX_ I32 n)
928 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
931 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
934 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
935 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
938 PerlIO_stdstreams(pTHX)
941 PerlIO_allocate(aTHX);
942 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
943 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
944 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
949 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
952 l = PerlMemShared_calloc(tab->size, sizeof(char));
954 Zero(l, tab->size, char);
958 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
959 (mode) ? mode : "(Null)", arg);
960 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
969 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
982 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
985 * Remove the dummy layer
990 * Pop back to bottom layer
994 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
995 if (*PerlIONext(f)) {
1000 * Nothing bellow - push unix on top then remove it
1002 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1003 PerlIO_pop(aTHX_ PerlIONext(f));
1008 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1015 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1016 PerlIO_list_t *layers, IV n)
1018 IV max = layers->cur;
1021 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1023 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1034 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1038 PerlIO_list_t *layers = PerlIO_list_alloc();
1039 code = PerlIO_parse_layers(aTHX_ layers, names);
1041 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1043 PerlIO_list_free(layers);
1049 /*--------------------------------------------------------------------------------------*/
1051 * Given the abstraction above the public API functions
1055 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1057 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1058 f, PerlIOBase(f)->tab->name, iotype, mode,
1059 (names) ? names : "(Null)");
1061 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1064 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1065 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1068 top = PerlIONext(top);
1072 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1075 #undef PerlIO__close
1077 PerlIO__close(PerlIO *f)
1080 return (*PerlIOBase(f)->tab->Close) (f);
1082 SETERRNO(EBADF, SS$_IVCHAN);
1089 PerlIO_close(PerlIO *f)
1094 code = (*PerlIOBase(f)->tab->Close) (f);
1096 PerlIO_pop(aTHX_ f);
1102 #undef PerlIO_fileno
1104 PerlIO_fileno(PerlIO *f)
1107 return (*PerlIOBase(f)->tab->Fileno) (f);
1109 SETERRNO(EBADF, SS$_IVCHAN);
1115 PerlIO_context_layers(pTHX_ const char *mode)
1117 const char *type = NULL;
1119 * Need to supply default layer info from open.pm
1122 SV *layers = PL_curcop->cop_io;
1125 type = SvPV(layers, len);
1126 if (type && mode[0] != 'r') {
1128 * Skip to write part
1130 const char *s = strchr(type, 0);
1131 if (s && (s - type) < len) {
1140 static PerlIO_funcs *
1141 PerlIO_layer_from_ref(pTHX_ SV *sv)
1144 * For any scalar type load the handler which is bundled with perl
1146 if (SvTYPE(sv) < SVt_PVAV)
1147 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1150 * For other types allow if layer is known but don't try and load it
1152 switch (SvTYPE(sv)) {
1154 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1156 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1158 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1160 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1166 PerlIO_resolve_layers(pTHX_ const char *layers,
1167 const char *mode, int narg, SV **args)
1169 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1172 PerlIO_stdstreams(aTHX);
1176 * If it is a reference but not an object see if we have a handler
1179 if (SvROK(arg) && !sv_isobject(arg)) {
1180 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1182 def = PerlIO_list_alloc();
1183 PerlIO_list_push(def, handler, &PL_sv_undef);
1187 * Don't fail if handler cannot be found :Via(...) etc. may do
1188 * something sensible else we will just stringfy and open
1194 layers = PerlIO_context_layers(aTHX_ mode);
1195 if (layers && *layers) {
1199 av = PerlIO_list_alloc();
1200 for (i = 0; i < def->cur; i++) {
1201 PerlIO_list_push(av, def->array[i].funcs,
1208 PerlIO_parse_layers(aTHX_ av, layers);
1219 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1220 int imode, int perm, PerlIO *f, int narg, SV **args)
1222 if (!f && narg == 1 && *args == &PL_sv_undef) {
1223 if ((f = PerlIO_tmpfile())) {
1225 layers = PerlIO_context_layers(aTHX_ mode);
1226 if (layers && *layers)
1227 PerlIO_apply_layers(aTHX_ f, mode, layers);
1231 PerlIO_list_t *layera = NULL;
1233 PerlIO_funcs *tab = NULL;
1236 * This is "reopen" - it is not tested as perl does not use it
1240 layera = PerlIO_list_alloc();
1243 (l->tab->Getarg) ? (*l->tab->
1244 Getarg) (&l) : &PL_sv_undef;
1245 PerlIO_list_push(layera, l->tab, arg);
1246 l = *PerlIONext(&l);
1250 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1253 * Start at "top" of layer stack
1255 n = layera->cur - 1;
1257 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1266 * Found that layer 'n' can do opens - call it
1268 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1269 tab->name, layers, mode, fd, imode, perm, f, narg,
1271 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1274 if (n + 1 < layera->cur) {
1276 * More layers above the one that we used to open -
1279 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1286 PerlIO_list_free(layera);
1292 #undef PerlIO_fdopen
1294 PerlIO_fdopen(int fd, const char *mode)
1297 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1302 PerlIO_open(const char *path, const char *mode)
1305 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1306 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1309 #undef PerlIO_reopen
1311 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1314 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1315 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1320 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1323 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1325 SETERRNO(EBADF, SS$_IVCHAN);
1330 #undef PerlIO_unread
1332 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1335 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1337 SETERRNO(EBADF, SS$_IVCHAN);
1344 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1347 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1349 SETERRNO(EBADF, SS$_IVCHAN);
1356 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1359 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1361 SETERRNO(EBADF, SS$_IVCHAN);
1368 PerlIO_tell(PerlIO *f)
1371 return (*PerlIOBase(f)->tab->Tell) (f);
1373 SETERRNO(EBADF, SS$_IVCHAN);
1380 PerlIO_flush(PerlIO *f)
1384 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1385 if (tab && tab->Flush) {
1386 return (*tab->Flush) (f);
1389 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1390 SETERRNO(EBADF, SS$_IVCHAN);
1395 PerlIO_debug("Cannot flush f=%p\n", f);
1396 SETERRNO(EBADF, SS$_IVCHAN);
1402 * Is it good API design to do flush-all on NULL, a potentially
1403 * errorneous input? Maybe some magical value (PerlIO*
1404 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1405 * things on fflush(NULL), but should we be bound by their design
1409 PerlIO **table = &PL_perlio;
1411 while ((f = *table)) {
1413 table = (PerlIO **) (f++);
1414 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1415 if (*f && PerlIO_flush(f) != 0)
1425 PerlIOBase_flush_linebuf()
1428 PerlIO **table = &PL_perlio;
1430 while ((f = *table)) {
1432 table = (PerlIO **) (f++);
1433 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1436 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1437 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1446 PerlIO_fill(PerlIO *f)
1449 return (*PerlIOBase(f)->tab->Fill) (f);
1451 SETERRNO(EBADF, SS$_IVCHAN);
1456 #undef PerlIO_isutf8
1458 PerlIO_isutf8(PerlIO *f)
1461 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1463 SETERRNO(EBADF, SS$_IVCHAN);
1470 PerlIO_eof(PerlIO *f)
1473 return (*PerlIOBase(f)->tab->Eof) (f);
1475 SETERRNO(EBADF, SS$_IVCHAN);
1482 PerlIO_error(PerlIO *f)
1485 return (*PerlIOBase(f)->tab->Error) (f);
1487 SETERRNO(EBADF, SS$_IVCHAN);
1492 #undef PerlIO_clearerr
1494 PerlIO_clearerr(PerlIO *f)
1497 (*PerlIOBase(f)->tab->Clearerr) (f);
1499 SETERRNO(EBADF, SS$_IVCHAN);
1502 #undef PerlIO_setlinebuf
1504 PerlIO_setlinebuf(PerlIO *f)
1507 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1509 SETERRNO(EBADF, SS$_IVCHAN);
1512 #undef PerlIO_has_base
1514 PerlIO_has_base(PerlIO *f)
1517 return (PerlIOBase(f)->tab->Get_base != NULL);
1522 #undef PerlIO_fast_gets
1524 PerlIO_fast_gets(PerlIO *f)
1526 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1527 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1528 return (tab->Set_ptrcnt != NULL);
1533 #undef PerlIO_has_cntptr
1535 PerlIO_has_cntptr(PerlIO *f)
1538 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1539 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1544 #undef PerlIO_canset_cnt
1546 PerlIO_canset_cnt(PerlIO *f)
1549 PerlIOl *l = PerlIOBase(f);
1550 return (l->tab->Set_ptrcnt != NULL);
1555 #undef PerlIO_get_base
1557 PerlIO_get_base(PerlIO *f)
1560 return (*PerlIOBase(f)->tab->Get_base) (f);
1564 #undef PerlIO_get_bufsiz
1566 PerlIO_get_bufsiz(PerlIO *f)
1569 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1573 #undef PerlIO_get_ptr
1575 PerlIO_get_ptr(PerlIO *f)
1577 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1578 if (tab->Get_ptr == NULL)
1580 return (*tab->Get_ptr) (f);
1583 #undef PerlIO_get_cnt
1585 PerlIO_get_cnt(PerlIO *f)
1587 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1588 if (tab->Get_cnt == NULL)
1590 return (*tab->Get_cnt) (f);
1593 #undef PerlIO_set_cnt
1595 PerlIO_set_cnt(PerlIO *f, int cnt)
1597 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1600 #undef PerlIO_set_ptrcnt
1602 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1604 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1605 if (tab->Set_ptrcnt == NULL) {
1607 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1609 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1612 /*--------------------------------------------------------------------------------------*/
1614 * utf8 and raw dummy layers
1618 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1620 if (PerlIONext(f)) {
1622 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1623 PerlIO_pop(aTHX_ f);
1624 if (tab->kind & PERLIO_K_UTF8)
1625 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1627 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1633 PerlIO_funcs PerlIO_utf8 = {
1636 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1654 NULL, /* get_base */
1655 NULL, /* get_bufsiz */
1658 NULL, /* set_ptrcnt */
1661 PerlIO_funcs PerlIO_byte = {
1682 NULL, /* get_base */
1683 NULL, /* get_bufsiz */
1686 NULL, /* set_ptrcnt */
1690 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1691 IV n, const char *mode, int fd, int imode, int perm,
1692 PerlIO *old, int narg, SV **args)
1694 PerlIO_funcs *tab = PerlIO_default_btm();
1695 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1699 PerlIO_funcs PerlIO_raw = {
1720 NULL, /* get_base */
1721 NULL, /* get_bufsiz */
1724 NULL, /* set_ptrcnt */
1726 /*--------------------------------------------------------------------------------------*/
1727 /*--------------------------------------------------------------------------------------*/
1729 * "Methods" of the "base class"
1733 PerlIOBase_fileno(PerlIO *f)
1735 return PerlIO_fileno(PerlIONext(f));
1739 PerlIO_modestr(PerlIO *f, char *buf)
1742 IV flags = PerlIOBase(f)->flags;
1743 if (flags & PERLIO_F_APPEND) {
1745 if (flags & PERLIO_F_CANREAD) {
1749 else if (flags & PERLIO_F_CANREAD) {
1751 if (flags & PERLIO_F_CANWRITE)
1754 else if (flags & PERLIO_F_CANWRITE) {
1756 if (flags & PERLIO_F_CANREAD) {
1760 #if O_TEXT != O_BINARY
1761 if (!(flags & PERLIO_F_CRLF))
1769 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1771 PerlIOl *l = PerlIOBase(f);
1773 const char *omode = mode;
1776 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1777 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1778 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1779 if (tab->Set_ptrcnt != NULL)
1780 l->flags |= PERLIO_F_FASTGETS;
1782 if (*mode == '#' || *mode == 'I')
1786 l->flags |= PERLIO_F_CANREAD;
1789 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1792 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1795 SETERRNO(EINVAL, LIB$_INVARG);
1801 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1804 l->flags &= ~PERLIO_F_CRLF;
1807 l->flags |= PERLIO_F_CRLF;
1810 SETERRNO(EINVAL, LIB$_INVARG);
1817 l->flags |= l->next->flags &
1818 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1823 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1824 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1825 l->flags, PerlIO_modestr(f, temp));
1831 PerlIOBase_popped(PerlIO *f)
1837 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1841 * Save the position as current head considers it
1843 Off_t old = PerlIO_tell(f);
1845 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1846 PerlIOSelf(f, PerlIOBuf)->posn = old;
1847 done = PerlIOBuf_unread(f, vbuf, count);
1852 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1854 STDCHAR *buf = (STDCHAR *) vbuf;
1856 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1859 SSize_t avail = PerlIO_get_cnt(f);
1862 take = (count < avail) ? count : avail;
1864 STDCHAR *ptr = PerlIO_get_ptr(f);
1865 Copy(ptr, buf, take, STDCHAR);
1866 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1870 if (count > 0 && avail <= 0) {
1871 if (PerlIO_fill(f) != 0)
1875 return (buf - (STDCHAR *) vbuf);
1881 PerlIOBase_noop_ok(PerlIO *f)
1887 PerlIOBase_noop_fail(PerlIO *f)
1893 PerlIOBase_close(PerlIO *f)
1896 PerlIO *n = PerlIONext(f);
1897 if (PerlIO_flush(f) != 0)
1899 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1901 PerlIOBase(f)->flags &=
1902 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1907 PerlIOBase_eof(PerlIO *f)
1910 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1916 PerlIOBase_error(PerlIO *f)
1919 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1925 PerlIOBase_clearerr(PerlIO *f)
1928 PerlIO *n = PerlIONext(f);
1929 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1936 PerlIOBase_setlinebuf(PerlIO *f)
1939 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1943 /*--------------------------------------------------------------------------------------*/
1945 * Bottom-most level for UNIX-like case
1949 struct _PerlIO base; /* The generic part */
1950 int fd; /* UNIX like file descriptor */
1951 int oflags; /* open/fcntl flags */
1955 PerlIOUnix_oflags(const char *mode)
1958 if (*mode == 'I' || *mode == '#')
1963 if (*++mode == '+') {
1970 oflags = O_CREAT | O_TRUNC;
1971 if (*++mode == '+') {
1980 oflags = O_CREAT | O_APPEND;
1981 if (*++mode == '+') {
1994 else if (*mode == 't') {
1996 oflags &= ~O_BINARY;
2000 * Always open in binary mode
2003 if (*mode || oflags == -1) {
2004 SETERRNO(EINVAL, LIB$_INVARG);
2011 PerlIOUnix_fileno(PerlIO *f)
2013 return PerlIOSelf(f, PerlIOUnix)->fd;
2017 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2019 IV code = PerlIOBase_pushed(f, mode, arg);
2020 if (*PerlIONext(f)) {
2021 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2022 s->fd = PerlIO_fileno(PerlIONext(f));
2024 * XXX could (or should) we retrieve the oflags from the open file
2025 * handle rather than believing the "mode" we are passed in? XXX
2026 * Should the value on NULL mode be 0 or -1?
2028 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2030 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2035 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2036 IV n, const char *mode, int fd, int imode,
2037 int perm, PerlIO *f, int narg, SV **args)
2040 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2041 (*PerlIOBase(f)->tab->Close) (f);
2044 char *path = SvPV_nolen(*args);
2048 imode = PerlIOUnix_oflags(mode);
2052 fd = PerlLIO_open3(path, imode, perm);
2060 f = PerlIO_allocate(aTHX);
2061 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2065 s = PerlIOSelf(f, PerlIOUnix);
2068 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2074 * FIXME: pop layers ???
2082 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2088 return sv_dup(arg, param);
2091 return newSVsv(arg);
2094 return newSVsv(arg);
2099 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2101 PerlIO *nexto = PerlIONext(o);
2103 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2104 f = (*tab->Dup)(aTHX_ f, nexto, param);
2107 PerlIO_funcs *self = PerlIOBase(o)->tab;
2110 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
2112 arg = (*self->Getarg)(o);
2114 arg = PerlIO_sv_dup(aTHX_ arg, param);
2117 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2126 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2128 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2129 int fd = PerlLIO_dup(os->fd);
2131 f = PerlIOBase_dup(aTHX_ f, o, param);
2133 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2134 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2147 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2150 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2151 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2154 SSize_t len = PerlLIO_read(fd, vbuf, count);
2155 if (len >= 0 || errno != EINTR) {
2157 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2158 else if (len == 0 && count != 0)
2159 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2167 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2170 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2172 SSize_t len = PerlLIO_write(fd, vbuf, count);
2173 if (len >= 0 || errno != EINTR) {
2175 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2183 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2187 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2188 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2189 return (new == (Off_t) - 1) ? -1 : 0;
2193 PerlIOUnix_tell(PerlIO *f)
2196 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2201 PerlIOUnix_close(PerlIO *f)
2204 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2206 while (PerlLIO_close(fd) != 0) {
2207 if (errno != EINTR) {
2214 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2219 PerlIO_funcs PerlIO_unix = {
2235 PerlIOBase_noop_ok, /* flush */
2236 PerlIOBase_noop_fail, /* fill */
2239 PerlIOBase_clearerr,
2240 PerlIOBase_setlinebuf,
2241 NULL, /* get_base */
2242 NULL, /* get_bufsiz */
2245 NULL, /* set_ptrcnt */
2248 /*--------------------------------------------------------------------------------------*/
2254 struct _PerlIO base;
2255 FILE *stdio; /* The stream */
2259 PerlIOStdio_fileno(PerlIO *f)
2262 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2266 PerlIOStdio_mode(const char *mode, char *tmode)
2272 if (O_BINARY != O_TEXT) {
2280 * This isn't used yet ...
2283 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2285 if (*PerlIONext(f)) {
2287 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2290 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2291 PerlIOStdio_mode(mode, tmode));
2297 return PerlIOBase_pushed(f, mode, arg);
2300 #undef PerlIO_importFILE
2302 PerlIO_importFILE(FILE *stdio, int fl)
2308 PerlIOSelf(PerlIO_push
2309 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2310 "r+", Nullsv), PerlIOStdio);
2317 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2318 IV n, const char *mode, int fd, int imode,
2319 int perm, PerlIO *f, int narg, SV **args)
2323 char *path = SvPV_nolen(*args);
2324 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2326 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2335 char *path = SvPV_nolen(*args);
2338 fd = PerlLIO_open3(path, imode, perm);
2341 FILE *stdio = PerlSIO_fopen(path, mode);
2344 PerlIOSelf(PerlIO_push
2345 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2346 (mode = PerlIOStdio_mode(mode, tmode)),
2364 stdio = PerlSIO_stdin;
2367 stdio = PerlSIO_stdout;
2370 stdio = PerlSIO_stderr;
2375 stdio = PerlSIO_fdopen(fd, mode =
2376 PerlIOStdio_mode(mode, tmode));
2380 PerlIOSelf(PerlIO_push
2381 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2382 mode, PerlIOArg), PerlIOStdio);
2392 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2395 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2398 STDCHAR *buf = (STDCHAR *) vbuf;
2400 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2401 * stdio does not do that for fread()
2403 int ch = PerlSIO_fgetc(s);
2410 got = PerlSIO_fread(vbuf, 1, count, s);
2415 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2418 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2419 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2422 int ch = *buf-- & 0xff;
2423 if (PerlSIO_ungetc(ch, s) != ch)
2432 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2435 return PerlSIO_fwrite(vbuf, 1, count,
2436 PerlIOSelf(f, PerlIOStdio)->stdio);
2440 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2443 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2444 return PerlSIO_fseek(stdio, offset, whence);
2448 PerlIOStdio_tell(PerlIO *f)
2451 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2452 return PerlSIO_ftell(stdio);
2456 PerlIOStdio_close(PerlIO *f)
2459 #ifdef SOCKS5_VERSION_NAME
2461 Sock_size_t optlen = sizeof(int);
2463 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2465 #ifdef SOCKS5_VERSION_NAME
2467 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2469 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2471 PerlSIO_fclose(stdio)
2478 PerlIOStdio_flush(PerlIO *f)
2481 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2482 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2483 return PerlSIO_fflush(stdio);
2488 * FIXME: This discards ungetc() and pre-read stuff which is not
2489 * right if this is just a "sync" from a layer above Suspect right
2490 * design is to do _this_ but not have layer above flush this
2491 * layer read-to-read
2494 * Not writeable - sync by attempting a seek
2497 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2505 PerlIOStdio_fill(PerlIO *f)
2508 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2511 * fflush()ing read-only streams can cause trouble on some stdio-s
2513 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2514 if (PerlSIO_fflush(stdio) != 0)
2517 c = PerlSIO_fgetc(stdio);
2518 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2524 PerlIOStdio_eof(PerlIO *f)
2527 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2531 PerlIOStdio_error(PerlIO *f)
2534 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2538 PerlIOStdio_clearerr(PerlIO *f)
2541 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2545 PerlIOStdio_setlinebuf(PerlIO *f)
2548 #ifdef HAS_SETLINEBUF
2549 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2551 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2557 PerlIOStdio_get_base(PerlIO *f)
2560 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2561 return PerlSIO_get_base(stdio);
2565 PerlIOStdio_get_bufsiz(PerlIO *f)
2568 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2569 return PerlSIO_get_bufsiz(stdio);
2573 #ifdef USE_STDIO_PTR
2575 PerlIOStdio_get_ptr(PerlIO *f)
2578 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2579 return PerlSIO_get_ptr(stdio);
2583 PerlIOStdio_get_cnt(PerlIO *f)
2586 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2587 return PerlSIO_get_cnt(stdio);
2591 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2593 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2596 #ifdef STDIO_PTR_LVALUE
2597 PerlSIO_set_ptr(stdio, ptr);
2598 #ifdef STDIO_PTR_LVAL_SETS_CNT
2599 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2601 assert(PerlSIO_get_cnt(stdio) == (cnt));
2604 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2606 * Setting ptr _does_ change cnt - we are done
2610 #else /* STDIO_PTR_LVALUE */
2612 #endif /* STDIO_PTR_LVALUE */
2615 * Now (or only) set cnt
2617 #ifdef STDIO_CNT_LVALUE
2618 PerlSIO_set_cnt(stdio, cnt);
2619 #else /* STDIO_CNT_LVALUE */
2620 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2621 PerlSIO_set_ptr(stdio,
2622 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2624 #else /* STDIO_PTR_LVAL_SETS_CNT */
2626 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2627 #endif /* STDIO_CNT_LVALUE */
2633 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2635 /* This assumes no layers underneath - which is what
2636 happens, but is not how I remember it. NI-S 2001/10/16
2638 int fd = PerlLIO_dup(PerlIO_fileno(o));
2641 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2643 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2644 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2647 PerlSIO_fclose(stdio);
2658 PerlIO_funcs PerlIO_stdio = {
2660 sizeof(PerlIOStdio),
2678 PerlIOStdio_clearerr,
2679 PerlIOStdio_setlinebuf,
2681 PerlIOStdio_get_base,
2682 PerlIOStdio_get_bufsiz,
2687 #ifdef USE_STDIO_PTR
2688 PerlIOStdio_get_ptr,
2689 PerlIOStdio_get_cnt,
2690 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2691 PerlIOStdio_set_ptrcnt
2692 #else /* STDIO_PTR_LVALUE */
2694 #endif /* STDIO_PTR_LVALUE */
2695 #else /* USE_STDIO_PTR */
2699 #endif /* USE_STDIO_PTR */
2702 #undef PerlIO_exportFILE
2704 PerlIO_exportFILE(PerlIO *f, int fl)
2708 stdio = fdopen(PerlIO_fileno(f), "r+");
2712 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2719 #undef PerlIO_findFILE
2721 PerlIO_findFILE(PerlIO *f)
2725 if (l->tab == &PerlIO_stdio) {
2726 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2729 l = *PerlIONext(&l);
2731 return PerlIO_exportFILE(f, 0);
2734 #undef PerlIO_releaseFILE
2736 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2740 /*--------------------------------------------------------------------------------------*/
2742 * perlio buffer layer
2746 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2749 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2750 int fd = PerlIO_fileno(f);
2752 if (fd >= 0 && PerlLIO_isatty(fd)) {
2753 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2755 posn = PerlIO_tell(PerlIONext(f));
2756 if (posn != (Off_t) - 1) {
2759 return PerlIOBase_pushed(f, mode, arg);
2763 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2764 IV n, const char *mode, int fd, int imode, int perm,
2765 PerlIO *f, int narg, SV **args)
2768 PerlIO *next = PerlIONext(f);
2770 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2772 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2775 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2781 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2789 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2792 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2793 fd = PerlIO_fileno(f);
2794 #if O_BINARY != O_TEXT
2796 * do something about failing setmode()? --jhi
2798 PerlLIO_setmode(fd, O_BINARY);
2800 if (init && fd == 2) {
2802 * Initial stderr is unbuffered
2804 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2812 * This "flush" is akin to sfio's sync in that it handles files in either
2813 * read or write state
2816 PerlIOBuf_flush(PerlIO *f)
2818 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2820 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2822 * write() the buffer
2824 STDCHAR *buf = b->buf;
2826 PerlIO *n = PerlIONext(f);
2827 while (p < b->ptr) {
2828 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2832 else if (count < 0 || PerlIO_error(n)) {
2833 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2838 b->posn += (p - buf);
2840 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2841 STDCHAR *buf = PerlIO_get_base(f);
2843 * Note position change
2845 b->posn += (b->ptr - buf);
2846 if (b->ptr < b->end) {
2848 * We did not consume all of it
2850 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2851 b->posn = PerlIO_tell(PerlIONext(f));
2855 b->ptr = b->end = b->buf;
2856 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2858 * FIXME: Is this right for read case ?
2860 if (PerlIO_flush(PerlIONext(f)) != 0)
2866 PerlIOBuf_fill(PerlIO *f)
2868 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2869 PerlIO *n = PerlIONext(f);
2872 * FIXME: doing the down-stream flush is a bad idea if it causes
2873 * pre-read data in stdio buffer to be discarded but this is too
2874 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2875 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2877 if (PerlIO_flush(f) != 0)
2879 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2880 PerlIOBase_flush_linebuf();
2883 PerlIO_get_base(f); /* allocate via vtable */
2885 b->ptr = b->end = b->buf;
2886 if (PerlIO_fast_gets(n)) {
2888 * Layer below is also buffered We do _NOT_ want to call its
2889 * ->Read() because that will loop till it gets what we asked for
2890 * which may hang on a pipe etc. Instead take anything it has to
2891 * hand, or ask it to fill _once_.
2893 avail = PerlIO_get_cnt(n);
2895 avail = PerlIO_fill(n);
2897 avail = PerlIO_get_cnt(n);
2899 if (!PerlIO_error(n) && PerlIO_eof(n))
2904 STDCHAR *ptr = PerlIO_get_ptr(n);
2905 SSize_t cnt = avail;
2906 if (avail > b->bufsiz)
2908 Copy(ptr, b->buf, avail, STDCHAR);
2909 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2913 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2917 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2919 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2922 b->end = b->buf + avail;
2923 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2928 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2930 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2934 return PerlIOBase_read(f, vbuf, count);
2940 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2942 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2943 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2946 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2951 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2953 * Buffer is already a read buffer, we can overwrite any chars
2954 * which have been read back to buffer start
2956 avail = (b->ptr - b->buf);
2960 * Buffer is idle, set it up so whole buffer is available for
2964 b->end = b->buf + avail;
2966 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2968 * Buffer extends _back_ from where we are now
2970 b->posn -= b->bufsiz;
2972 if (avail > (SSize_t) count) {
2974 * If we have space for more than count, just move count
2982 * In simple stdio-like ungetc() case chars will be already
2985 if (buf != b->ptr) {
2986 Copy(buf, b->ptr, avail, STDCHAR);
2990 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2997 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2999 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3000 const STDCHAR *buf = (const STDCHAR *) vbuf;
3004 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3007 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3008 if ((SSize_t) count < avail)
3010 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3011 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3026 Copy(buf, b->ptr, avail, STDCHAR);
3033 if (b->ptr >= (b->buf + b->bufsiz))
3036 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3042 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3045 if ((code = PerlIO_flush(f)) == 0) {
3046 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3047 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3048 code = PerlIO_seek(PerlIONext(f), offset, whence);
3050 b->posn = PerlIO_tell(PerlIONext(f));
3057 PerlIOBuf_tell(PerlIO *f)
3059 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3061 * b->posn is file position where b->buf was read, or will be written
3063 Off_t posn = b->posn;
3066 * If buffer is valid adjust position by amount in buffer
3068 posn += (b->ptr - b->buf);
3074 PerlIOBuf_close(PerlIO *f)
3076 IV code = PerlIOBase_close(f);
3077 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3078 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3082 b->ptr = b->end = b->buf;
3083 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3088 PerlIOBuf_get_ptr(PerlIO *f)
3090 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3097 PerlIOBuf_get_cnt(PerlIO *f)
3099 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3102 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3103 return (b->end - b->ptr);
3108 PerlIOBuf_get_base(PerlIO *f)
3110 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3115 Newz('B',b->buf,b->bufsiz, STDCHAR);
3117 b->buf = (STDCHAR *) & b->oneword;
3118 b->bufsiz = sizeof(b->oneword);
3127 PerlIOBuf_bufsiz(PerlIO *f)
3129 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3132 return (b->end - b->buf);
3136 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3138 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3142 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3144 assert(PerlIO_get_cnt(f) == cnt);
3145 assert(b->ptr >= b->buf);
3147 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3151 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3153 return PerlIOBase_dup(aTHX_ f, o, param);
3158 PerlIO_funcs PerlIO_perlio = {
3178 PerlIOBase_clearerr,
3179 PerlIOBase_setlinebuf,
3184 PerlIOBuf_set_ptrcnt,
3187 /*--------------------------------------------------------------------------------------*/
3189 * Temp layer to hold unread chars when cannot do it any other way
3193 PerlIOPending_fill(PerlIO *f)
3196 * Should never happen
3203 PerlIOPending_close(PerlIO *f)
3206 * A tad tricky - flush pops us, then we close new top
3209 return PerlIO_close(f);
3213 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3216 * A tad tricky - flush pops us, then we seek new top
3219 return PerlIO_seek(f, offset, whence);
3224 PerlIOPending_flush(PerlIO *f)
3227 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3228 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3229 PerlMemShared_free(b->buf);
3232 PerlIO_pop(aTHX_ f);
3237 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3243 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3248 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3250 IV code = PerlIOBase_pushed(f, mode, arg);
3251 PerlIOl *l = PerlIOBase(f);
3253 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3254 * etc. get muddled when it changes mid-string when we auto-pop.
3256 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3257 (PerlIOBase(PerlIONext(f))->
3258 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3263 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3265 SSize_t avail = PerlIO_get_cnt(f);
3270 got = PerlIOBuf_read(f, vbuf, avail);
3271 if (got >= 0 && got < count) {
3273 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3274 if (more >= 0 || got == 0)
3280 PerlIO_funcs PerlIO_pending = {
3284 PerlIOPending_pushed,
3295 PerlIOPending_close,
3296 PerlIOPending_flush,
3300 PerlIOBase_clearerr,
3301 PerlIOBase_setlinebuf,
3306 PerlIOPending_set_ptrcnt,
3311 /*--------------------------------------------------------------------------------------*/
3313 * crlf - translation On read translate CR,LF to "\n" we do this by
3314 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3315 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3319 PerlIOBuf base; /* PerlIOBuf stuff */
3320 STDCHAR *nl; /* Position of crlf we "lied" about in the
3325 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3328 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3329 code = PerlIOBuf_pushed(f, mode, arg);
3331 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3332 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3333 PerlIOBase(f)->flags);
3340 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3342 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3347 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3348 return PerlIOBuf_unread(f, vbuf, count);
3350 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3351 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3353 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3358 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3359 b->end = b->ptr = b->buf + b->bufsiz;
3360 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3361 b->posn -= b->bufsiz;
3363 while (count > 0 && b->ptr > b->buf) {
3366 if (b->ptr - 2 >= b->buf) {
3389 PerlIOCrlf_get_cnt(PerlIO *f)
3391 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3394 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3395 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3396 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3397 STDCHAR *nl = b->ptr;
3399 while (nl < b->end && *nl != 0xd)
3401 if (nl < b->end && *nl == 0xd) {
3403 if (nl + 1 < b->end) {
3410 * Not CR,LF but just CR
3418 * Blast - found CR as last char in buffer
3422 * They may not care, defer work as long as
3425 return (nl - b->ptr);
3429 b->ptr++; /* say we have read it as far as
3430 * flush() is concerned */
3431 b->buf++; /* Leave space an front of buffer */
3432 b->bufsiz--; /* Buffer is thus smaller */
3433 code = PerlIO_fill(f); /* Fetch some more */
3434 b->bufsiz++; /* Restore size for next time */
3435 b->buf--; /* Point at space */
3436 b->ptr = nl = b->buf; /* Which is what we hand
3438 b->posn--; /* Buffer starts here */
3439 *nl = 0xd; /* Fill in the CR */
3441 goto test; /* fill() call worked */
3443 * CR at EOF - just fall through
3449 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3455 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3457 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3458 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3459 IV flags = PerlIOBase(f)->flags;
3467 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3474 * Test code - delete when it works ...
3481 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3488 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3489 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3496 * They have taken what we lied about
3504 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3508 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3510 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3511 return PerlIOBuf_write(f, vbuf, count);
3513 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3514 const STDCHAR *buf = (const STDCHAR *) vbuf;
3515 const STDCHAR *ebuf = buf + count;
3518 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3520 while (buf < ebuf) {
3521 STDCHAR *eptr = b->buf + b->bufsiz;
3522 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3523 while (buf < ebuf && b->ptr < eptr) {
3525 if ((b->ptr + 2) > eptr) {
3533 *(b->ptr)++ = 0xd; /* CR */
3534 *(b->ptr)++ = 0xa; /* LF */
3536 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3546 if (b->ptr >= eptr) {
3552 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3554 return (buf - (STDCHAR *) vbuf);
3559 PerlIOCrlf_flush(PerlIO *f)
3561 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3566 return PerlIOBuf_flush(f);
3569 PerlIO_funcs PerlIO_crlf = {
3572 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3574 PerlIOBase_noop_ok, /* popped */
3579 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3581 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3582 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3590 PerlIOBase_clearerr,
3591 PerlIOBase_setlinebuf,
3596 PerlIOCrlf_set_ptrcnt,
3600 /*--------------------------------------------------------------------------------------*/
3602 * mmap as "buffer" layer
3606 PerlIOBuf base; /* PerlIOBuf stuff */
3607 Mmap_t mptr; /* Mapped address */
3608 Size_t len; /* mapped length */
3609 STDCHAR *bbuf; /* malloced buffer if map fails */
3612 static size_t page_size = 0;
3615 PerlIOMmap_map(PerlIO *f)
3618 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3619 IV flags = PerlIOBase(f)->flags;
3623 if (flags & PERLIO_F_CANREAD) {
3624 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3625 int fd = PerlIO_fileno(f);
3627 code = fstat(fd, &st);
3628 if (code == 0 && S_ISREG(st.st_mode)) {
3629 SSize_t len = st.st_size - b->posn;
3633 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3635 SETERRNO(0, SS$_NORMAL);
3636 # ifdef _SC_PAGESIZE
3637 page_size = sysconf(_SC_PAGESIZE);
3639 page_size = sysconf(_SC_PAGE_SIZE);
3641 if ((long) page_size < 0) {
3646 (void) SvUPGRADE(error, SVt_PV);
3647 msg = SvPVx(error, n_a);
3648 Perl_croak(aTHX_ "panic: sysconf: %s",
3653 "panic: sysconf: pagesize unknown");
3657 # ifdef HAS_GETPAGESIZE
3658 page_size = getpagesize();
3660 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3661 page_size = PAGESIZE; /* compiletime, bad */
3665 if ((IV) page_size <= 0)
3666 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3671 * This is a hack - should never happen - open should
3674 b->posn = PerlIO_tell(PerlIONext(f));
3676 posn = (b->posn / page_size) * page_size;
3677 len = st.st_size - posn;
3678 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3679 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3680 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3681 madvise(m->mptr, len, MADV_SEQUENTIAL);
3683 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3684 madvise(m->mptr, len, MADV_WILLNEED);
3686 PerlIOBase(f)->flags =
3687 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3688 b->end = ((STDCHAR *) m->mptr) + len;
3689 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3698 PerlIOBase(f)->flags =
3699 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3701 b->ptr = b->end = b->ptr;
3710 PerlIOMmap_unmap(PerlIO *f)
3712 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3713 PerlIOBuf *b = &m->base;
3717 code = munmap(m->mptr, m->len);
3721 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3724 b->ptr = b->end = b->buf;
3725 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3731 PerlIOMmap_get_base(PerlIO *f)
3733 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3734 PerlIOBuf *b = &m->base;
3735 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3737 * Already have a readbuffer in progress
3743 * We have a write buffer or flushed PerlIOBuf read buffer
3745 m->bbuf = b->buf; /* save it in case we need it again */
3746 b->buf = NULL; /* Clear to trigger below */
3749 PerlIOMmap_map(f); /* Try and map it */
3752 * Map did not work - recover PerlIOBuf buffer if we have one
3757 b->ptr = b->end = b->buf;
3760 return PerlIOBuf_get_base(f);
3764 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3766 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3767 PerlIOBuf *b = &m->base;
3768 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3770 if (b->ptr && (b->ptr - count) >= b->buf
3771 && memEQ(b->ptr - count, vbuf, count)) {
3773 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3778 * Loose the unwritable mapped buffer
3782 * If flush took the "buffer" see if we have one from before
3784 if (!b->buf && m->bbuf)
3787 PerlIOBuf_get_base(f);
3791 return PerlIOBuf_unread(f, vbuf, count);
3795 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3797 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3798 PerlIOBuf *b = &m->base;
3799 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3801 * No, or wrong sort of, buffer
3804 if (PerlIOMmap_unmap(f) != 0)
3808 * If unmap took the "buffer" see if we have one from before
3810 if (!b->buf && m->bbuf)
3813 PerlIOBuf_get_base(f);
3817 return PerlIOBuf_write(f, vbuf, count);
3821 PerlIOMmap_flush(PerlIO *f)
3823 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3824 PerlIOBuf *b = &m->base;
3825 IV code = PerlIOBuf_flush(f);
3827 * Now we are "synced" at PerlIOBuf level
3834 if (PerlIOMmap_unmap(f) != 0)
3839 * We seem to have a PerlIOBuf buffer which was not mapped
3840 * remember it in case we need one later
3849 PerlIOMmap_fill(PerlIO *f)
3851 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3852 IV code = PerlIO_flush(f);
3853 if (code == 0 && !b->buf) {
3854 code = PerlIOMmap_map(f);
3856 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3857 code = PerlIOBuf_fill(f);
3863 PerlIOMmap_close(PerlIO *f)
3865 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3866 PerlIOBuf *b = &m->base;
3867 IV code = PerlIO_flush(f);
3871 b->ptr = b->end = b->buf;
3873 if (PerlIOBuf_close(f) != 0)
3879 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3881 return PerlIOBase_dup(aTHX_ f, o, param);
3885 PerlIO_funcs PerlIO_mmap = {
3905 PerlIOBase_clearerr,
3906 PerlIOBase_setlinebuf,
3907 PerlIOMmap_get_base,
3911 PerlIOBuf_set_ptrcnt,
3914 #endif /* HAS_MMAP */
3921 call_atexit(PerlIO_cleanup_layers, NULL);
3925 atexit(&PerlIO_cleanup);
3936 PerlIO_stdstreams(aTHX);
3938 return &PL_perlio[1];
3941 #undef PerlIO_stdout
3947 PerlIO_stdstreams(aTHX);
3949 return &PL_perlio[2];
3952 #undef PerlIO_stderr
3958 PerlIO_stdstreams(aTHX);
3960 return &PL_perlio[3];
3963 /*--------------------------------------------------------------------------------------*/
3965 #undef PerlIO_getname
3967 PerlIO_getname(PerlIO *f, char *buf)
3972 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3974 name = fgetname(stdio, buf);
3976 Perl_croak(aTHX_ "Don't know how to get file name");
3982 /*--------------------------------------------------------------------------------------*/
3984 * Functions which can be called on any kind of PerlIO implemented in
3990 PerlIO_getc(PerlIO *f)
3993 SSize_t count = PerlIO_read(f, buf, 1);
3995 return (unsigned char) buf[0];
4000 #undef PerlIO_ungetc
4002 PerlIO_ungetc(PerlIO *f, int ch)
4006 if (PerlIO_unread(f, &buf, 1) == 1)
4014 PerlIO_putc(PerlIO *f, int ch)
4017 return PerlIO_write(f, &buf, 1);
4022 PerlIO_puts(PerlIO *f, const char *s)
4024 STRLEN len = strlen(s);
4025 return PerlIO_write(f, s, len);
4028 #undef PerlIO_rewind
4030 PerlIO_rewind(PerlIO *f)
4032 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4036 #undef PerlIO_vprintf
4038 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4041 SV *sv = newSVpvn("", 0);
4047 Perl_va_copy(ap, apc);
4048 sv_vcatpvf(sv, fmt, &apc);
4050 sv_vcatpvf(sv, fmt, &ap);
4053 wrote = PerlIO_write(f, s, len);
4058 #undef PerlIO_printf
4060 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4065 result = PerlIO_vprintf(f, fmt, ap);
4070 #undef PerlIO_stdoutf
4072 PerlIO_stdoutf(const char *fmt, ...)
4077 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4082 #undef PerlIO_tmpfile
4084 PerlIO_tmpfile(void)
4087 * I have no idea how portable mkstemp() is ...
4089 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4092 FILE *stdio = PerlSIO_tmpfile();
4095 PerlIOSelf(PerlIO_push
4096 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4097 "w+", Nullsv), PerlIOStdio);
4103 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4104 int fd = mkstemp(SvPVX(sv));
4107 f = PerlIO_fdopen(fd, "w+");
4109 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4111 PerlLIO_unlink(SvPVX(sv));
4121 #endif /* USE_SFIO */
4122 #endif /* PERLIO_IS_STDIO */
4124 /*======================================================================================*/
4126 * Now some functions in terms of above which may be needed even if we are
4127 * not in true PerlIO mode
4131 #undef PerlIO_setpos
4133 PerlIO_setpos(PerlIO *f, SV *pos)
4138 Off_t *posn = (Off_t *) SvPV(pos, len);
4139 if (f && len == sizeof(Off_t))
4140 return PerlIO_seek(f, *posn, SEEK_SET);
4142 SETERRNO(EINVAL, SS$_IVCHAN);
4146 #undef PerlIO_setpos
4148 PerlIO_setpos(PerlIO *f, SV *pos)
4153 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4154 if (f && len == sizeof(Fpos_t)) {
4155 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4156 return fsetpos64(f, fpos);
4158 return fsetpos(f, fpos);
4162 SETERRNO(EINVAL, SS$_IVCHAN);
4168 #undef PerlIO_getpos
4170 PerlIO_getpos(PerlIO *f, SV *pos)
4173 Off_t posn = PerlIO_tell(f);
4174 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4175 return (posn == (Off_t) - 1) ? -1 : 0;
4178 #undef PerlIO_getpos
4180 PerlIO_getpos(PerlIO *f, SV *pos)
4185 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4186 code = fgetpos64(f, &fpos);
4188 code = fgetpos(f, &fpos);
4190 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4195 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4198 vprintf(char *pat, char *args)
4200 _doprnt(pat, args, stdout);
4201 return 0; /* wrong, but perl doesn't use the return
4206 vfprintf(FILE *fd, char *pat, char *args)
4208 _doprnt(pat, args, fd);
4209 return 0; /* wrong, but perl doesn't use the return
4215 #ifndef PerlIO_vsprintf
4217 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4219 int val = vsprintf(s, fmt, ap);
4221 if (strlen(s) >= (STRLEN) n) {
4223 (void) PerlIO_puts(Perl_error_log,
4224 "panic: sprintf overflow - memory corrupted!\n");
4232 #ifndef PerlIO_sprintf
4234 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4239 result = PerlIO_vsprintf(s, n, fmt, ap);