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
43 #undef PerlMemShared_calloc
44 #define PerlMemShared_calloc(x,y) calloc(x,y)
45 #undef PerlMemShared_free
46 #define PerlMemShared_free(x) free(x)
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)
102 #ifndef PERLIO_LAYERS
104 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
106 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
109 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
117 PerlIO_destruct(pTHX)
122 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
127 return perlsio_binmode(fp, iotype, mode);
132 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
136 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
137 int imode, int perm, PerlIO *old, int narg, SV **args)
140 if (*args == &PL_sv_undef)
141 return PerlIO_tmpfile();
143 char *name = SvPV_nolen(*args);
145 fd = PerlLIO_open3(name, imode, perm);
147 return PerlIO_fdopen(fd, (char *) mode + 1);
150 return PerlIO_reopen(name, mode, old);
153 return PerlIO_open(name, mode);
158 return PerlIO_fdopen(fd, (char *) mode);
163 XS(XS_PerlIO__Layer__find)
167 Perl_croak(aTHX_ "Usage class->find(name[,load])");
169 char *name = SvPV_nolen(ST(1));
170 ST(0) = (strEQ(name, "crlf")
171 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
178 Perl_boot_core_PerlIO(pTHX)
180 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
186 #ifdef PERLIO_IS_STDIO
192 * Does nothing (yet) except force this file to be included in perl
193 * binary. That allows this file to force inclusion of other functions
194 * that may be required by loadable extensions e.g. for
195 * FileHandle::tmpfile
199 #undef PerlIO_tmpfile
206 #else /* PERLIO_IS_STDIO */
214 * This section is just to make sure these functions get pulled in from
218 #undef PerlIO_tmpfile
229 * Force this file to be included in perl binary. Which allows this
230 * file to force inclusion of other functions that may be required by
231 * loadable extensions e.g. for FileHandle::tmpfile
235 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
236 * results in a lot of lseek()s to regular files and lot of small
239 sfset(sfstdout, SF_SHARE, 0);
243 PerlIO_importFILE(FILE *stdio, int fl)
245 int fd = fileno(stdio);
246 PerlIO *r = PerlIO_fdopen(fd, "r+");
251 PerlIO_findFILE(PerlIO *pio)
253 int fd = PerlIO_fileno(pio);
254 FILE *f = fdopen(fd, "r+");
256 if (!f && errno == EINVAL)
258 if (!f && errno == EINVAL)
265 /*======================================================================================*/
267 * Implement all the PerlIO interface ourselves.
273 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
280 #include <sys/mman.h>
284 void PerlIO_debug(const char *fmt, ...)
285 __attribute__ ((format(__printf__, 1, 2)));
288 PerlIO_debug(const char *fmt, ...)
295 char *s = PerlEnv_getenv("PERLIO_DEBUG");
297 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
303 SV *sv = newSVpvn("", 0);
306 s = CopFILE(PL_curcop);
309 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
310 (IV) CopLINE(PL_curcop));
311 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
314 PerlLIO_write(dbg, s, len);
320 /*--------------------------------------------------------------------------------------*/
323 * Inner level routines
327 * Table of pointers to the PerlIO structs (malloc'ed)
329 PerlIO *_perlio = NULL;
330 #define PERLIO_TABLE_SIZE 64
335 PerlIO_allocate(pTHX)
338 * Find a free slot in the table, allocating new table as necessary
343 while ((f = *last)) {
345 last = (PerlIO **) (f);
346 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
352 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
361 PerlIO_cleantable(pTHX_ PerlIO **tablep)
363 PerlIO *table = *tablep;
366 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
367 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
368 PerlIO *f = table + i;
373 PerlMemShared_free(table);
378 PerlIO_list_t *PerlIO_known_layers;
379 PerlIO_list_t *PerlIO_def_layerlist;
382 PerlIO_list_alloc(void)
385 Newz('L', list, 1, PerlIO_list_t);
391 PerlIO_list_free(PerlIO_list_t *list)
394 if (--list->refcnt == 0) {
398 for (i = 0; i < list->cur; i++) {
399 if (list->array[i].arg)
400 SvREFCNT_dec(list->array[i].arg);
402 Safefree(list->array);
410 PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
414 if (list->cur >= list->len) {
417 Renew(list->array, list->len, PerlIO_pair_t);
419 New('l', list->array, list->len, PerlIO_pair_t);
421 p = &(list->array[list->cur++]);
423 if ((p->arg = arg)) {
430 PerlIO_cleanup_layers(pTHX_ void *data)
433 PerlIO_known_layers = Nullhv;
434 PerlIO_def_layerlist = Nullav;
442 PerlIO_cleantable(aTHX_ & _perlio);
446 PerlIO_destruct(pTHX)
448 PerlIO **table = &_perlio;
450 while ((f = *table)) {
452 table = (PerlIO **) (f++);
453 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
457 if (l->tab->kind & PERLIO_K_DESTRUCT) {
458 PerlIO_debug("Destruct popping %s\n", l->tab->name);
472 PerlIO_pop(pTHX_ PerlIO *f)
476 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
477 if (l->tab->Popped) {
479 * If popped returns non-zero do not free its layer structure
480 * it has either done so itself, or it is shared and still in
483 if ((*l->tab->Popped) (f) != 0)
487 PerlMemShared_free(l);
491 /*--------------------------------------------------------------------------------------*/
493 * XS Interface for perl code
497 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
500 if ((SSize_t) len <= 0)
502 for (i = 0; i < PerlIO_known_layers->cur; i++) {
503 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
504 if (memEQ(f->name, name, len)) {
505 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
509 if (load && PL_subname && PerlIO_def_layerlist
510 && PerlIO_def_layerlist->cur >= 2) {
511 SV *pkgsv = newSVpvn("PerlIO", 6);
512 SV *layer = newSVpvn(name, len);
515 * The two SVs are magically freed by load_module
517 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
519 return PerlIO_find_layer(aTHX_ name, len, 0);
521 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
525 #ifdef USE_ATTRIBUTES_FOR_PERLIO
528 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
531 IO *io = GvIOn((GV *) SvRV(sv));
532 PerlIO *ifp = IoIFP(io);
533 PerlIO *ofp = IoOFP(io);
534 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
540 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
543 IO *io = GvIOn((GV *) SvRV(sv));
544 PerlIO *ifp = IoIFP(io);
545 PerlIO *ofp = IoOFP(io);
546 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
552 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
554 Perl_warn(aTHX_ "clear %" SVf, sv);
559 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
561 Perl_warn(aTHX_ "free %" SVf, sv);
565 MGVTBL perlio_vtab = {
573 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
576 SV *sv = SvRV(ST(1));
581 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
583 mg = mg_find(sv, PERL_MAGIC_ext);
584 mg->mg_virtual = &perlio_vtab;
586 Perl_warn(aTHX_ "attrib %" SVf, sv);
587 for (i = 2; i < items; i++) {
589 const char *name = SvPV(ST(i), len);
590 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
592 av_push(av, SvREFCNT_inc(layer));
603 #endif /* USE_ATTIBUTES_FOR_PERLIO */
606 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
608 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
609 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
613 XS(XS_PerlIO__Layer__find)
617 Perl_croak(aTHX_ "Usage class->find(name[,load])");
620 char *name = SvPV(ST(1), len);
621 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
622 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
624 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
631 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
633 if (!PerlIO_known_layers)
634 PerlIO_known_layers = PerlIO_list_alloc();
635 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
636 PerlIO_debug("define %s %p\n", tab->name, tab);
640 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
643 const char *s = names;
645 while (isSPACE(*s) || *s == ':')
650 const char *as = Nullch;
652 if (!isIDFIRST(*s)) {
654 * Message is consistent with how attribute lists are
655 * passed. Even though this means "foo : : bar" is
656 * seen as an invalid separator character.
658 char q = ((*s == '\'') ? '"' : '\'');
660 "perlio: invalid separator character %c%c%c in layer specification list",
666 } while (isALNUM(*e));
682 * It's a nul terminated string, not allowed
683 * to \ the terminating null. Anything other
684 * character is passed over.
695 "perlio: argument list not closed for layer \"%.*s\"",
707 PerlIO_funcs *layer =
708 PerlIO_find_layer(aTHX_ s, llen, 1);
710 PerlIO_list_push(av, layer,
716 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
729 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
731 PerlIO_funcs *tab = &PerlIO_perlio;
732 if (O_BINARY != O_TEXT) {
736 if (PerlIO_stdio.Set_ptrcnt) {
740 PerlIO_debug("Pushing %s\n", tab->name);
741 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
746 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
748 return av->array[n].arg;
752 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
754 if (n >= 0 && n < av->cur) {
755 PerlIO_debug("Layer %" IVdf " is %s\n", n,
756 av->array[n].funcs->name);
757 return av->array[n].funcs;
760 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
765 PerlIO_default_layers(pTHX)
767 if (!PerlIO_def_layerlist) {
768 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
769 PerlIO_funcs *osLayer = &PerlIO_unix;
770 PerlIO_def_layerlist = PerlIO_list_alloc();
771 PerlIO_define_layer(aTHX_ & PerlIO_unix);
772 #if defined(WIN32) && !defined(UNDER_CE)
773 PerlIO_define_layer(aTHX_ & PerlIO_win32);
775 osLayer = &PerlIO_win32;
778 PerlIO_define_layer(aTHX_ & PerlIO_raw);
779 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
780 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
781 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
783 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
785 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
786 PerlIO_define_layer(aTHX_ & PerlIO_byte);
787 PerlIO_list_push(PerlIO_def_layerlist,
788 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
791 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
794 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
797 if (PerlIO_def_layerlist->cur < 2) {
798 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
800 return PerlIO_def_layerlist;
804 Perl_boot_core_PerlIO(pTHX)
806 #ifdef USE_ATTRIBUTES_FOR_PERLIO
807 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
810 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
814 PerlIO_default_layer(pTHX_ I32 n)
816 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
819 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
822 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
823 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
826 PerlIO_stdstreams(pTHX)
829 PerlIO_allocate(aTHX);
830 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
831 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
832 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
837 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
840 l = PerlMemShared_calloc(tab->size, sizeof(char));
842 Zero(l, tab->size, char);
846 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
847 (mode) ? mode : "(Null)", arg);
848 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
857 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
870 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
873 * Remove the dummy layer
878 * Pop back to bottom layer
882 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
883 if (*PerlIONext(f)) {
888 * Nothing bellow - push unix on top then remove it
890 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
891 PerlIO_pop(aTHX_ PerlIONext(f));
896 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
903 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
904 PerlIO_list_t *layers, IV n)
906 IV max = layers->cur;
909 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
911 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
922 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
926 PerlIO_list_t *layers = PerlIO_list_alloc();
927 code = PerlIO_parse_layers(aTHX_ layers, names);
929 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
931 PerlIO_list_free(layers);
937 /*--------------------------------------------------------------------------------------*/
939 * Given the abstraction above the public API functions
943 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
945 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
946 f, PerlIOBase(f)->tab->name, iotype, mode,
947 (names) ? names : "(Null)");
948 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
951 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
953 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
956 top = PerlIONext(top);
959 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
964 PerlIO__close(PerlIO *f)
967 return (*PerlIOBase(f)->tab->Close) (f);
969 SETERRNO(EBADF, SS$_IVCHAN);
974 #undef PerlIO_fdupopen
976 PerlIO_fdupopen(pTHX_ PerlIO *f)
980 int fd = PerlLIO_dup(PerlIO_fileno(f));
981 PerlIO *new = PerlIO_fdopen(fd, PerlIO_modestr(f, buf));
983 Off_t posn = PerlIO_tell(f);
984 PerlIO_seek(new, posn, SEEK_SET);
989 SETERRNO(EBADF, SS$_IVCHAN);
996 PerlIO_close(PerlIO *f)
1001 code = (*PerlIOBase(f)->tab->Close) (f);
1003 PerlIO_pop(aTHX_ f);
1009 #undef PerlIO_fileno
1011 PerlIO_fileno(PerlIO *f)
1014 return (*PerlIOBase(f)->tab->Fileno) (f);
1016 SETERRNO(EBADF, SS$_IVCHAN);
1022 PerlIO_context_layers(pTHX_ const char *mode)
1024 const char *type = NULL;
1026 * Need to supply default layer info from open.pm
1029 SV *layers = PL_curcop->cop_io;
1032 type = SvPV(layers, len);
1033 if (type && mode[0] != 'r') {
1035 * Skip to write part
1037 const char *s = strchr(type, 0);
1038 if (s && (s - type) < len) {
1047 static PerlIO_funcs *
1048 PerlIO_layer_from_ref(pTHX_ SV *sv)
1051 * For any scalar type load the handler which is bundled with perl
1053 if (SvTYPE(sv) < SVt_PVAV)
1054 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1057 * For other types allow if layer is known but don't try and load it
1059 switch (SvTYPE(sv)) {
1061 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1063 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1065 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1067 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1073 PerlIO_resolve_layers(pTHX_ const char *layers,
1074 const char *mode, int narg, SV **args)
1076 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1079 PerlIO_stdstreams(aTHX);
1083 * If it is a reference but not an object see if we have a handler
1086 if (SvROK(arg) && !sv_isobject(arg)) {
1087 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1089 def = PerlIO_list_alloc();
1090 PerlIO_list_push(def, handler, &PL_sv_undef);
1094 * Don't fail if handler cannot be found :Via(...) etc. may do
1095 * something sensible else we will just stringfy and open
1101 layers = PerlIO_context_layers(aTHX_ mode);
1102 if (layers && *layers) {
1106 av = PerlIO_list_alloc();
1107 for (i = 0; i < def->cur; i++) {
1108 PerlIO_list_push(av, def->array[i].funcs,
1115 PerlIO_parse_layers(aTHX_ av, layers);
1126 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1127 int imode, int perm, PerlIO *f, int narg, SV **args)
1129 if (!f && narg == 1 && *args == &PL_sv_undef) {
1130 if ((f = PerlIO_tmpfile())) {
1132 layers = PerlIO_context_layers(aTHX_ mode);
1133 if (layers && *layers)
1134 PerlIO_apply_layers(aTHX_ f, mode, layers);
1138 PerlIO_list_t *layera = NULL;
1140 PerlIO_funcs *tab = NULL;
1143 * This is "reopen" - it is not tested as perl does not use it
1147 layera = PerlIO_list_alloc();
1150 (l->tab->Getarg) ? (*l->tab->
1151 Getarg) (&l) : &PL_sv_undef;
1152 PerlIO_list_push(layera, l->tab, arg);
1153 l = *PerlIONext(&l);
1157 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1160 * Start at "top" of layer stack
1162 n = layera->cur - 1;
1164 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1173 * Found that layer 'n' can do opens - call it
1175 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1176 tab->name, layers, mode, fd, imode, perm, f, narg,
1178 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1181 if (n + 1 < layera->cur) {
1183 * More layers above the one that we used to open -
1186 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1193 PerlIO_list_free(layera);
1199 #undef PerlIO_fdopen
1201 PerlIO_fdopen(int fd, const char *mode)
1204 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1209 PerlIO_open(const char *path, const char *mode)
1212 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1213 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1216 #undef PerlIO_reopen
1218 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1221 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1222 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1227 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1230 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1232 SETERRNO(EBADF, SS$_IVCHAN);
1237 #undef PerlIO_unread
1239 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1242 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1244 SETERRNO(EBADF, SS$_IVCHAN);
1251 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1254 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1256 SETERRNO(EBADF, SS$_IVCHAN);
1263 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1266 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1268 SETERRNO(EBADF, SS$_IVCHAN);
1275 PerlIO_tell(PerlIO *f)
1278 return (*PerlIOBase(f)->tab->Tell) (f);
1280 SETERRNO(EBADF, SS$_IVCHAN);
1287 PerlIO_flush(PerlIO *f)
1291 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1292 if (tab && tab->Flush) {
1293 return (*tab->Flush) (f);
1296 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1297 SETERRNO(EBADF, SS$_IVCHAN);
1302 PerlIO_debug("Cannot flush f=%p\n", f);
1303 SETERRNO(EBADF, SS$_IVCHAN);
1309 * Is it good API design to do flush-all on NULL, a potentially
1310 * errorneous input? Maybe some magical value (PerlIO*
1311 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1312 * things on fflush(NULL), but should we be bound by their design
1315 PerlIO **table = &_perlio;
1317 while ((f = *table)) {
1319 table = (PerlIO **) (f++);
1320 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1321 if (*f && PerlIO_flush(f) != 0)
1331 PerlIOBase_flush_linebuf()
1333 PerlIO **table = &_perlio;
1335 while ((f = *table)) {
1337 table = (PerlIO **) (f++);
1338 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1341 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1342 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1351 PerlIO_fill(PerlIO *f)
1354 return (*PerlIOBase(f)->tab->Fill) (f);
1356 SETERRNO(EBADF, SS$_IVCHAN);
1361 #undef PerlIO_isutf8
1363 PerlIO_isutf8(PerlIO *f)
1366 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1368 SETERRNO(EBADF, SS$_IVCHAN);
1375 PerlIO_eof(PerlIO *f)
1378 return (*PerlIOBase(f)->tab->Eof) (f);
1380 SETERRNO(EBADF, SS$_IVCHAN);
1387 PerlIO_error(PerlIO *f)
1390 return (*PerlIOBase(f)->tab->Error) (f);
1392 SETERRNO(EBADF, SS$_IVCHAN);
1397 #undef PerlIO_clearerr
1399 PerlIO_clearerr(PerlIO *f)
1402 (*PerlIOBase(f)->tab->Clearerr) (f);
1404 SETERRNO(EBADF, SS$_IVCHAN);
1407 #undef PerlIO_setlinebuf
1409 PerlIO_setlinebuf(PerlIO *f)
1412 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1414 SETERRNO(EBADF, SS$_IVCHAN);
1417 #undef PerlIO_has_base
1419 PerlIO_has_base(PerlIO *f)
1422 return (PerlIOBase(f)->tab->Get_base != NULL);
1427 #undef PerlIO_fast_gets
1429 PerlIO_fast_gets(PerlIO *f)
1431 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1432 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1433 return (tab->Set_ptrcnt != NULL);
1438 #undef PerlIO_has_cntptr
1440 PerlIO_has_cntptr(PerlIO *f)
1443 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1444 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1449 #undef PerlIO_canset_cnt
1451 PerlIO_canset_cnt(PerlIO *f)
1454 PerlIOl *l = PerlIOBase(f);
1455 return (l->tab->Set_ptrcnt != NULL);
1460 #undef PerlIO_get_base
1462 PerlIO_get_base(PerlIO *f)
1465 return (*PerlIOBase(f)->tab->Get_base) (f);
1469 #undef PerlIO_get_bufsiz
1471 PerlIO_get_bufsiz(PerlIO *f)
1474 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1478 #undef PerlIO_get_ptr
1480 PerlIO_get_ptr(PerlIO *f)
1482 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1483 if (tab->Get_ptr == NULL)
1485 return (*tab->Get_ptr) (f);
1488 #undef PerlIO_get_cnt
1490 PerlIO_get_cnt(PerlIO *f)
1492 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1493 if (tab->Get_cnt == NULL)
1495 return (*tab->Get_cnt) (f);
1498 #undef PerlIO_set_cnt
1500 PerlIO_set_cnt(PerlIO *f, int cnt)
1502 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1505 #undef PerlIO_set_ptrcnt
1507 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1509 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1510 if (tab->Set_ptrcnt == NULL) {
1512 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1514 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1517 /*--------------------------------------------------------------------------------------*/
1519 * utf8 and raw dummy layers
1523 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1525 if (PerlIONext(f)) {
1527 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1528 PerlIO_pop(aTHX_ f);
1529 if (tab->kind & PERLIO_K_UTF8)
1530 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1532 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1538 PerlIO_funcs PerlIO_utf8 = {
1541 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1559 NULL, /* get_base */
1560 NULL, /* get_bufsiz */
1563 NULL, /* set_ptrcnt */
1566 PerlIO_funcs PerlIO_byte = {
1587 NULL, /* get_base */
1588 NULL, /* get_bufsiz */
1591 NULL, /* set_ptrcnt */
1595 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1596 IV n, const char *mode, int fd, int imode, int perm,
1597 PerlIO *old, int narg, SV **args)
1599 PerlIO_funcs *tab = PerlIO_default_btm();
1600 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1604 PerlIO_funcs PerlIO_raw = {
1625 NULL, /* get_base */
1626 NULL, /* get_bufsiz */
1629 NULL, /* set_ptrcnt */
1631 /*--------------------------------------------------------------------------------------*/
1632 /*--------------------------------------------------------------------------------------*/
1634 * "Methods" of the "base class"
1638 PerlIOBase_fileno(PerlIO *f)
1640 return PerlIO_fileno(PerlIONext(f));
1644 PerlIO_modestr(PerlIO *f, char *buf)
1647 IV flags = PerlIOBase(f)->flags;
1648 if (flags & PERLIO_F_APPEND) {
1650 if (flags & PERLIO_F_CANREAD) {
1654 else if (flags & PERLIO_F_CANREAD) {
1656 if (flags & PERLIO_F_CANWRITE)
1659 else if (flags & PERLIO_F_CANWRITE) {
1661 if (flags & PERLIO_F_CANREAD) {
1665 #if O_TEXT != O_BINARY
1666 if (!(flags & PERLIO_F_CRLF))
1674 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1676 PerlIOl *l = PerlIOBase(f);
1678 const char *omode = mode;
1681 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1682 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1683 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1684 if (tab->Set_ptrcnt != NULL)
1685 l->flags |= PERLIO_F_FASTGETS;
1687 if (*mode == '#' || *mode == 'I')
1691 l->flags |= PERLIO_F_CANREAD;
1694 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1697 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1700 SETERRNO(EINVAL, LIB$_INVARG);
1706 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1709 l->flags &= ~PERLIO_F_CRLF;
1712 l->flags |= PERLIO_F_CRLF;
1715 SETERRNO(EINVAL, LIB$_INVARG);
1722 l->flags |= l->next->flags &
1723 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1728 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1729 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1730 l->flags, PerlIO_modestr(f, temp));
1736 PerlIOBase_popped(PerlIO *f)
1742 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1746 * Save the position as current head considers it
1748 Off_t old = PerlIO_tell(f);
1750 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1751 PerlIOSelf(f, PerlIOBuf)->posn = old;
1752 done = PerlIOBuf_unread(f, vbuf, count);
1757 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1759 STDCHAR *buf = (STDCHAR *) vbuf;
1761 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1764 SSize_t avail = PerlIO_get_cnt(f);
1767 take = (count < avail) ? count : avail;
1769 STDCHAR *ptr = PerlIO_get_ptr(f);
1770 Copy(ptr, buf, take, STDCHAR);
1771 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1775 if (count > 0 && avail <= 0) {
1776 if (PerlIO_fill(f) != 0)
1780 return (buf - (STDCHAR *) vbuf);
1786 PerlIOBase_noop_ok(PerlIO *f)
1792 PerlIOBase_noop_fail(PerlIO *f)
1798 PerlIOBase_close(PerlIO *f)
1801 PerlIO *n = PerlIONext(f);
1802 if (PerlIO_flush(f) != 0)
1804 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1806 PerlIOBase(f)->flags &=
1807 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1812 PerlIOBase_eof(PerlIO *f)
1815 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1821 PerlIOBase_error(PerlIO *f)
1824 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1830 PerlIOBase_clearerr(PerlIO *f)
1833 PerlIO *n = PerlIONext(f);
1834 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1841 PerlIOBase_setlinebuf(PerlIO *f)
1844 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1848 /*--------------------------------------------------------------------------------------*/
1850 * Bottom-most level for UNIX-like case
1854 struct _PerlIO base; /* The generic part */
1855 int fd; /* UNIX like file descriptor */
1856 int oflags; /* open/fcntl flags */
1860 PerlIOUnix_oflags(const char *mode)
1863 if (*mode == 'I' || *mode == '#')
1868 if (*++mode == '+') {
1875 oflags = O_CREAT | O_TRUNC;
1876 if (*++mode == '+') {
1885 oflags = O_CREAT | O_APPEND;
1886 if (*++mode == '+') {
1899 else if (*mode == 't') {
1901 oflags &= ~O_BINARY;
1905 * Always open in binary mode
1908 if (*mode || oflags == -1) {
1909 SETERRNO(EINVAL, LIB$_INVARG);
1916 PerlIOUnix_fileno(PerlIO *f)
1918 return PerlIOSelf(f, PerlIOUnix)->fd;
1922 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
1924 IV code = PerlIOBase_pushed(f, mode, arg);
1925 if (*PerlIONext(f)) {
1926 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1927 s->fd = PerlIO_fileno(PerlIONext(f));
1929 * XXX could (or should) we retrieve the oflags from the open file
1930 * handle rather than believing the "mode" we are passed in? XXX
1931 * Should the value on NULL mode be 0 or -1?
1933 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1935 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1940 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1941 IV n, const char *mode, int fd, int imode,
1942 int perm, PerlIO *f, int narg, SV **args)
1945 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1946 (*PerlIOBase(f)->tab->Close) (f);
1949 char *path = SvPV_nolen(*args);
1953 imode = PerlIOUnix_oflags(mode);
1957 fd = PerlLIO_open3(path, imode, perm);
1965 f = PerlIO_allocate(aTHX);
1966 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1970 s = PerlIOSelf(f, PerlIOUnix);
1973 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1979 * FIXME: pop layers ???
1987 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
1990 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
1991 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1994 SSize_t len = PerlLIO_read(fd, vbuf, count);
1995 if (len >= 0 || errno != EINTR) {
1997 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
1998 else if (len == 0 && count != 0)
1999 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2007 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2010 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2012 SSize_t len = PerlLIO_write(fd, vbuf, count);
2013 if (len >= 0 || errno != EINTR) {
2015 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2023 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2027 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2028 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2029 return (new == (Off_t) - 1) ? -1 : 0;
2033 PerlIOUnix_tell(PerlIO *f)
2036 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2040 PerlIOUnix_close(PerlIO *f)
2043 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2045 while (PerlLIO_close(fd) != 0) {
2046 if (errno != EINTR) {
2053 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2058 PerlIO_funcs PerlIO_unix = {
2073 PerlIOBase_noop_ok, /* flush */
2074 PerlIOBase_noop_fail, /* fill */
2077 PerlIOBase_clearerr,
2078 PerlIOBase_setlinebuf,
2079 NULL, /* get_base */
2080 NULL, /* get_bufsiz */
2083 NULL, /* set_ptrcnt */
2086 /*--------------------------------------------------------------------------------------*/
2092 struct _PerlIO base;
2093 FILE *stdio; /* The stream */
2097 PerlIOStdio_fileno(PerlIO *f)
2100 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2104 PerlIOStdio_mode(const char *mode, char *tmode)
2110 if (O_BINARY != O_TEXT) {
2118 * This isn't used yet ...
2121 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2123 if (*PerlIONext(f)) {
2125 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2128 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2129 PerlIOStdio_mode(mode, tmode));
2135 return PerlIOBase_pushed(f, mode, arg);
2138 #undef PerlIO_importFILE
2140 PerlIO_importFILE(FILE *stdio, int fl)
2146 PerlIOSelf(PerlIO_push
2147 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2148 "r+", Nullsv), PerlIOStdio);
2155 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2156 IV n, const char *mode, int fd, int imode,
2157 int perm, PerlIO *f, int narg, SV **args)
2161 char *path = SvPV_nolen(*args);
2162 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2164 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2173 char *path = SvPV_nolen(*args);
2176 fd = PerlLIO_open3(path, imode, perm);
2179 FILE *stdio = PerlSIO_fopen(path, mode);
2182 PerlIOSelf(PerlIO_push
2183 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2184 (mode = PerlIOStdio_mode(mode, tmode)),
2202 stdio = PerlSIO_stdin;
2205 stdio = PerlSIO_stdout;
2208 stdio = PerlSIO_stderr;
2213 stdio = PerlSIO_fdopen(fd, mode =
2214 PerlIOStdio_mode(mode, tmode));
2218 PerlIOSelf(PerlIO_push
2219 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2220 mode, PerlIOArg), PerlIOStdio);
2230 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2233 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2236 STDCHAR *buf = (STDCHAR *) vbuf;
2238 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2239 * stdio does not do that for fread()
2241 int ch = PerlSIO_fgetc(s);
2248 got = PerlSIO_fread(vbuf, 1, count, s);
2253 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2256 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2257 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2260 int ch = *buf-- & 0xff;
2261 if (PerlSIO_ungetc(ch, s) != ch)
2270 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2273 return PerlSIO_fwrite(vbuf, 1, count,
2274 PerlIOSelf(f, PerlIOStdio)->stdio);
2278 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2281 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2282 return PerlSIO_fseek(stdio, offset, whence);
2286 PerlIOStdio_tell(PerlIO *f)
2289 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2290 return PerlSIO_ftell(stdio);
2294 PerlIOStdio_close(PerlIO *f)
2297 #ifdef SOCKS5_VERSION_NAME
2299 Sock_size_t optlen = sizeof(int);
2301 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2303 #ifdef SOCKS5_VERSION_NAME
2305 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2307 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2309 PerlSIO_fclose(stdio)
2316 PerlIOStdio_flush(PerlIO *f)
2319 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2320 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2321 return PerlSIO_fflush(stdio);
2326 * FIXME: This discards ungetc() and pre-read stuff which is not
2327 * right if this is just a "sync" from a layer above Suspect right
2328 * design is to do _this_ but not have layer above flush this
2329 * layer read-to-read
2332 * Not writeable - sync by attempting a seek
2335 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2343 PerlIOStdio_fill(PerlIO *f)
2346 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2349 * fflush()ing read-only streams can cause trouble on some stdio-s
2351 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2352 if (PerlSIO_fflush(stdio) != 0)
2355 c = PerlSIO_fgetc(stdio);
2356 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2362 PerlIOStdio_eof(PerlIO *f)
2365 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2369 PerlIOStdio_error(PerlIO *f)
2372 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2376 PerlIOStdio_clearerr(PerlIO *f)
2379 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2383 PerlIOStdio_setlinebuf(PerlIO *f)
2386 #ifdef HAS_SETLINEBUF
2387 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2389 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2395 PerlIOStdio_get_base(PerlIO *f)
2398 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2399 return PerlSIO_get_base(stdio);
2403 PerlIOStdio_get_bufsiz(PerlIO *f)
2406 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2407 return PerlSIO_get_bufsiz(stdio);
2411 #ifdef USE_STDIO_PTR
2413 PerlIOStdio_get_ptr(PerlIO *f)
2416 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2417 return PerlSIO_get_ptr(stdio);
2421 PerlIOStdio_get_cnt(PerlIO *f)
2424 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2425 return PerlSIO_get_cnt(stdio);
2429 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2431 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2434 #ifdef STDIO_PTR_LVALUE
2435 PerlSIO_set_ptr(stdio, ptr);
2436 #ifdef STDIO_PTR_LVAL_SETS_CNT
2437 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2439 assert(PerlSIO_get_cnt(stdio) == (cnt));
2442 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2444 * Setting ptr _does_ change cnt - we are done
2448 #else /* STDIO_PTR_LVALUE */
2450 #endif /* STDIO_PTR_LVALUE */
2453 * Now (or only) set cnt
2455 #ifdef STDIO_CNT_LVALUE
2456 PerlSIO_set_cnt(stdio, cnt);
2457 #else /* STDIO_CNT_LVALUE */
2458 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2459 PerlSIO_set_ptr(stdio,
2460 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2462 #else /* STDIO_PTR_LVAL_SETS_CNT */
2464 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2465 #endif /* STDIO_CNT_LVALUE */
2470 PerlIO_funcs PerlIO_stdio = {
2472 sizeof(PerlIOStdio),
2489 PerlIOStdio_clearerr,
2490 PerlIOStdio_setlinebuf,
2492 PerlIOStdio_get_base,
2493 PerlIOStdio_get_bufsiz,
2498 #ifdef USE_STDIO_PTR
2499 PerlIOStdio_get_ptr,
2500 PerlIOStdio_get_cnt,
2501 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2502 PerlIOStdio_set_ptrcnt
2503 #else /* STDIO_PTR_LVALUE */
2505 #endif /* STDIO_PTR_LVALUE */
2506 #else /* USE_STDIO_PTR */
2510 #endif /* USE_STDIO_PTR */
2513 #undef PerlIO_exportFILE
2515 PerlIO_exportFILE(PerlIO *f, int fl)
2519 stdio = fdopen(PerlIO_fileno(f), "r+");
2523 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2530 #undef PerlIO_findFILE
2532 PerlIO_findFILE(PerlIO *f)
2536 if (l->tab == &PerlIO_stdio) {
2537 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2540 l = *PerlIONext(&l);
2542 return PerlIO_exportFILE(f, 0);
2545 #undef PerlIO_releaseFILE
2547 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2551 /*--------------------------------------------------------------------------------------*/
2553 * perlio buffer layer
2557 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2560 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2561 int fd = PerlIO_fileno(f);
2563 if (fd >= 0 && PerlLIO_isatty(fd)) {
2564 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2566 posn = PerlIO_tell(PerlIONext(f));
2567 if (posn != (Off_t) - 1) {
2570 return PerlIOBase_pushed(f, mode, arg);
2574 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2575 IV n, const char *mode, int fd, int imode, int perm,
2576 PerlIO *f, int narg, SV **args)
2579 PerlIO *next = PerlIONext(f);
2581 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2583 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2586 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2592 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2600 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2603 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2604 fd = PerlIO_fileno(f);
2605 #if O_BINARY != O_TEXT
2607 * do something about failing setmode()? --jhi
2609 PerlLIO_setmode(fd, O_BINARY);
2611 if (init && fd == 2) {
2613 * Initial stderr is unbuffered
2615 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2623 * This "flush" is akin to sfio's sync in that it handles files in either
2624 * read or write state
2627 PerlIOBuf_flush(PerlIO *f)
2629 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2631 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2633 * write() the buffer
2635 STDCHAR *buf = b->buf;
2637 PerlIO *n = PerlIONext(f);
2638 while (p < b->ptr) {
2639 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2643 else if (count < 0 || PerlIO_error(n)) {
2644 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2649 b->posn += (p - buf);
2651 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2652 STDCHAR *buf = PerlIO_get_base(f);
2654 * Note position change
2656 b->posn += (b->ptr - buf);
2657 if (b->ptr < b->end) {
2659 * We did not consume all of it
2661 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2662 b->posn = PerlIO_tell(PerlIONext(f));
2666 b->ptr = b->end = b->buf;
2667 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2669 * FIXME: Is this right for read case ?
2671 if (PerlIO_flush(PerlIONext(f)) != 0)
2677 PerlIOBuf_fill(PerlIO *f)
2679 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2680 PerlIO *n = PerlIONext(f);
2683 * FIXME: doing the down-stream flush is a bad idea if it causes
2684 * pre-read data in stdio buffer to be discarded but this is too
2685 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2686 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2688 if (PerlIO_flush(f) != 0)
2690 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2691 PerlIOBase_flush_linebuf();
2694 PerlIO_get_base(f); /* allocate via vtable */
2696 b->ptr = b->end = b->buf;
2697 if (PerlIO_fast_gets(n)) {
2699 * Layer below is also buffered We do _NOT_ want to call its
2700 * ->Read() because that will loop till it gets what we asked for
2701 * which may hang on a pipe etc. Instead take anything it has to
2702 * hand, or ask it to fill _once_.
2704 avail = PerlIO_get_cnt(n);
2706 avail = PerlIO_fill(n);
2708 avail = PerlIO_get_cnt(n);
2710 if (!PerlIO_error(n) && PerlIO_eof(n))
2715 STDCHAR *ptr = PerlIO_get_ptr(n);
2716 SSize_t cnt = avail;
2717 if (avail > b->bufsiz)
2719 Copy(ptr, b->buf, avail, STDCHAR);
2720 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2724 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2728 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2730 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2733 b->end = b->buf + avail;
2734 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2739 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2741 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2745 return PerlIOBase_read(f, vbuf, count);
2751 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2753 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2754 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2757 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2762 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2764 * Buffer is already a read buffer, we can overwrite any chars
2765 * which have been read back to buffer start
2767 avail = (b->ptr - b->buf);
2771 * Buffer is idle, set it up so whole buffer is available for
2775 b->end = b->buf + avail;
2777 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2779 * Buffer extends _back_ from where we are now
2781 b->posn -= b->bufsiz;
2783 if (avail > (SSize_t) count) {
2785 * If we have space for more than count, just move count
2793 * In simple stdio-like ungetc() case chars will be already
2796 if (buf != b->ptr) {
2797 Copy(buf, b->ptr, avail, STDCHAR);
2801 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2808 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2810 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2811 const STDCHAR *buf = (const STDCHAR *) vbuf;
2815 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2818 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2819 if ((SSize_t) count < avail)
2821 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2822 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2837 Copy(buf, b->ptr, avail, STDCHAR);
2844 if (b->ptr >= (b->buf + b->bufsiz))
2847 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2853 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2856 if ((code = PerlIO_flush(f)) == 0) {
2857 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2858 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2859 code = PerlIO_seek(PerlIONext(f), offset, whence);
2861 b->posn = PerlIO_tell(PerlIONext(f));
2868 PerlIOBuf_tell(PerlIO *f)
2870 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2872 * b->posn is file position where b->buf was read, or will be written
2874 Off_t posn = b->posn;
2877 * If buffer is valid adjust position by amount in buffer
2879 posn += (b->ptr - b->buf);
2885 PerlIOBuf_close(PerlIO *f)
2887 IV code = PerlIOBase_close(f);
2888 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2889 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2890 PerlMemShared_free(b->buf);
2893 b->ptr = b->end = b->buf;
2894 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2899 PerlIOBuf_get_ptr(PerlIO *f)
2901 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2908 PerlIOBuf_get_cnt(PerlIO *f)
2910 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2913 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
2914 return (b->end - b->ptr);
2919 PerlIOBuf_get_base(PerlIO *f)
2921 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2925 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
2927 b->buf = (STDCHAR *) & b->oneword;
2928 b->bufsiz = sizeof(b->oneword);
2937 PerlIOBuf_bufsiz(PerlIO *f)
2939 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2942 return (b->end - b->buf);
2946 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2948 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2952 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
2954 assert(PerlIO_get_cnt(f) == cnt);
2955 assert(b->ptr >= b->buf);
2957 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2960 PerlIO_funcs PerlIO_perlio = {
2979 PerlIOBase_clearerr,
2980 PerlIOBase_setlinebuf,
2985 PerlIOBuf_set_ptrcnt,
2988 /*--------------------------------------------------------------------------------------*/
2990 * Temp layer to hold unread chars when cannot do it any other way
2994 PerlIOPending_fill(PerlIO *f)
2997 * Should never happen
3004 PerlIOPending_close(PerlIO *f)
3007 * A tad tricky - flush pops us, then we close new top
3010 return PerlIO_close(f);
3014 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3017 * A tad tricky - flush pops us, then we seek new top
3020 return PerlIO_seek(f, offset, whence);
3025 PerlIOPending_flush(PerlIO *f)
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3029 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3030 PerlMemShared_free(b->buf);
3033 PerlIO_pop(aTHX_ f);
3038 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3044 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3049 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3051 IV code = PerlIOBase_pushed(f, mode, arg);
3052 PerlIOl *l = PerlIOBase(f);
3054 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3055 * etc. get muddled when it changes mid-string when we auto-pop.
3057 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3058 (PerlIOBase(PerlIONext(f))->
3059 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3064 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3066 SSize_t avail = PerlIO_get_cnt(f);
3071 got = PerlIOBuf_read(f, vbuf, avail);
3072 if (got >= 0 && got < count) {
3074 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3075 if (more >= 0 || got == 0)
3081 PerlIO_funcs PerlIO_pending = {
3085 PerlIOPending_pushed,
3095 PerlIOPending_close,
3096 PerlIOPending_flush,
3100 PerlIOBase_clearerr,
3101 PerlIOBase_setlinebuf,
3106 PerlIOPending_set_ptrcnt,
3111 /*--------------------------------------------------------------------------------------*/
3113 * crlf - translation On read translate CR,LF to "\n" we do this by
3114 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3115 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3119 PerlIOBuf base; /* PerlIOBuf stuff */
3120 STDCHAR *nl; /* Position of crlf we "lied" about in the
3125 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3128 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3129 code = PerlIOBuf_pushed(f, mode, arg);
3131 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3132 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3133 PerlIOBase(f)->flags);
3140 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3142 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3147 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3148 return PerlIOBuf_unread(f, vbuf, count);
3150 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3151 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3153 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3158 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3159 b->end = b->ptr = b->buf + b->bufsiz;
3160 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3161 b->posn -= b->bufsiz;
3163 while (count > 0 && b->ptr > b->buf) {
3166 if (b->ptr - 2 >= b->buf) {
3189 PerlIOCrlf_get_cnt(PerlIO *f)
3191 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3194 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3195 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3196 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3197 STDCHAR *nl = b->ptr;
3199 while (nl < b->end && *nl != 0xd)
3201 if (nl < b->end && *nl == 0xd) {
3203 if (nl + 1 < b->end) {
3210 * Not CR,LF but just CR
3218 * Blast - found CR as last char in buffer
3222 * They may not care, defer work as long as
3225 return (nl - b->ptr);
3229 b->ptr++; /* say we have read it as far as
3230 * flush() is concerned */
3231 b->buf++; /* Leave space an front of buffer */
3232 b->bufsiz--; /* Buffer is thus smaller */
3233 code = PerlIO_fill(f); /* Fetch some more */
3234 b->bufsiz++; /* Restore size for next time */
3235 b->buf--; /* Point at space */
3236 b->ptr = nl = b->buf; /* Which is what we hand
3238 b->posn--; /* Buffer starts here */
3239 *nl = 0xd; /* Fill in the CR */
3241 goto test; /* fill() call worked */
3243 * CR at EOF - just fall through
3249 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3255 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3257 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3258 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3259 IV flags = PerlIOBase(f)->flags;
3267 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3274 * Test code - delete when it works ...
3281 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3288 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3289 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3296 * They have taken what we lied about
3304 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3308 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3310 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3311 return PerlIOBuf_write(f, vbuf, count);
3313 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3314 const STDCHAR *buf = (const STDCHAR *) vbuf;
3315 const STDCHAR *ebuf = buf + count;
3318 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3320 while (buf < ebuf) {
3321 STDCHAR *eptr = b->buf + b->bufsiz;
3322 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3323 while (buf < ebuf && b->ptr < eptr) {
3325 if ((b->ptr + 2) > eptr) {
3333 *(b->ptr)++ = 0xd; /* CR */
3334 *(b->ptr)++ = 0xa; /* LF */
3336 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3346 if (b->ptr >= eptr) {
3352 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3354 return (buf - (STDCHAR *) vbuf);
3359 PerlIOCrlf_flush(PerlIO *f)
3361 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3366 return PerlIOBuf_flush(f);
3369 PerlIO_funcs PerlIO_crlf = {
3372 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3374 PerlIOBase_noop_ok, /* popped */
3378 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3380 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3381 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3389 PerlIOBase_clearerr,
3390 PerlIOBase_setlinebuf,
3395 PerlIOCrlf_set_ptrcnt,
3399 /*--------------------------------------------------------------------------------------*/
3401 * mmap as "buffer" layer
3405 PerlIOBuf base; /* PerlIOBuf stuff */
3406 Mmap_t mptr; /* Mapped address */
3407 Size_t len; /* mapped length */
3408 STDCHAR *bbuf; /* malloced buffer if map fails */
3411 static size_t page_size = 0;
3414 PerlIOMmap_map(PerlIO *f)
3417 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3418 IV flags = PerlIOBase(f)->flags;
3422 if (flags & PERLIO_F_CANREAD) {
3423 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3424 int fd = PerlIO_fileno(f);
3426 code = fstat(fd, &st);
3427 if (code == 0 && S_ISREG(st.st_mode)) {
3428 SSize_t len = st.st_size - b->posn;
3432 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3434 SETERRNO(0, SS$_NORMAL);
3435 # ifdef _SC_PAGESIZE
3436 page_size = sysconf(_SC_PAGESIZE);
3438 page_size = sysconf(_SC_PAGE_SIZE);
3440 if ((long) page_size < 0) {
3445 (void) SvUPGRADE(error, SVt_PV);
3446 msg = SvPVx(error, n_a);
3447 Perl_croak(aTHX_ "panic: sysconf: %s",
3452 "panic: sysconf: pagesize unknown");
3456 # ifdef HAS_GETPAGESIZE
3457 page_size = getpagesize();
3459 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3460 page_size = PAGESIZE; /* compiletime, bad */
3464 if ((IV) page_size <= 0)
3465 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3470 * This is a hack - should never happen - open should
3473 b->posn = PerlIO_tell(PerlIONext(f));
3475 posn = (b->posn / page_size) * page_size;
3476 len = st.st_size - posn;
3477 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3478 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3479 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3480 madvise(m->mptr, len, MADV_SEQUENTIAL);
3482 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3483 madvise(m->mptr, len, MADV_WILLNEED);
3485 PerlIOBase(f)->flags =
3486 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3487 b->end = ((STDCHAR *) m->mptr) + len;
3488 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3497 PerlIOBase(f)->flags =
3498 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3500 b->ptr = b->end = b->ptr;
3509 PerlIOMmap_unmap(PerlIO *f)
3511 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3512 PerlIOBuf *b = &m->base;
3516 code = munmap(m->mptr, m->len);
3520 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3523 b->ptr = b->end = b->buf;
3524 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3530 PerlIOMmap_get_base(PerlIO *f)
3532 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3533 PerlIOBuf *b = &m->base;
3534 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3536 * Already have a readbuffer in progress
3542 * We have a write buffer or flushed PerlIOBuf read buffer
3544 m->bbuf = b->buf; /* save it in case we need it again */
3545 b->buf = NULL; /* Clear to trigger below */
3548 PerlIOMmap_map(f); /* Try and map it */
3551 * Map did not work - recover PerlIOBuf buffer if we have one
3556 b->ptr = b->end = b->buf;
3559 return PerlIOBuf_get_base(f);
3563 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3565 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3566 PerlIOBuf *b = &m->base;
3567 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3569 if (b->ptr && (b->ptr - count) >= b->buf
3570 && memEQ(b->ptr - count, vbuf, count)) {
3572 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3577 * Loose the unwritable mapped buffer
3581 * If flush took the "buffer" see if we have one from before
3583 if (!b->buf && m->bbuf)
3586 PerlIOBuf_get_base(f);
3590 return PerlIOBuf_unread(f, vbuf, count);
3594 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3596 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3597 PerlIOBuf *b = &m->base;
3598 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3600 * No, or wrong sort of, buffer
3603 if (PerlIOMmap_unmap(f) != 0)
3607 * If unmap took the "buffer" see if we have one from before
3609 if (!b->buf && m->bbuf)
3612 PerlIOBuf_get_base(f);
3616 return PerlIOBuf_write(f, vbuf, count);
3620 PerlIOMmap_flush(PerlIO *f)
3622 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3623 PerlIOBuf *b = &m->base;
3624 IV code = PerlIOBuf_flush(f);
3626 * Now we are "synced" at PerlIOBuf level
3633 if (PerlIOMmap_unmap(f) != 0)
3638 * We seem to have a PerlIOBuf buffer which was not mapped
3639 * remember it in case we need one later
3648 PerlIOMmap_fill(PerlIO *f)
3650 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3651 IV code = PerlIO_flush(f);
3652 if (code == 0 && !b->buf) {
3653 code = PerlIOMmap_map(f);
3655 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3656 code = PerlIOBuf_fill(f);
3662 PerlIOMmap_close(PerlIO *f)
3664 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3665 PerlIOBuf *b = &m->base;
3666 IV code = PerlIO_flush(f);
3670 b->ptr = b->end = b->buf;
3672 if (PerlIOBuf_close(f) != 0)
3678 PerlIO_funcs PerlIO_mmap = {
3697 PerlIOBase_clearerr,
3698 PerlIOBase_setlinebuf,
3699 PerlIOMmap_get_base,
3703 PerlIOBuf_set_ptrcnt,
3706 #endif /* HAS_MMAP */
3713 call_atexit(PerlIO_cleanup_layers, NULL);
3717 atexit(&PerlIO_cleanup);
3728 PerlIO_stdstreams(aTHX);
3733 #undef PerlIO_stdout
3739 PerlIO_stdstreams(aTHX);
3744 #undef PerlIO_stderr
3750 PerlIO_stdstreams(aTHX);
3755 /*--------------------------------------------------------------------------------------*/
3757 #undef PerlIO_getname
3759 PerlIO_getname(PerlIO *f, char *buf)
3764 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3766 name = fgetname(stdio, buf);
3768 Perl_croak(aTHX_ "Don't know how to get file name");
3774 /*--------------------------------------------------------------------------------------*/
3776 * Functions which can be called on any kind of PerlIO implemented in
3782 PerlIO_getc(PerlIO *f)
3785 SSize_t count = PerlIO_read(f, buf, 1);
3787 return (unsigned char) buf[0];
3792 #undef PerlIO_ungetc
3794 PerlIO_ungetc(PerlIO *f, int ch)
3798 if (PerlIO_unread(f, &buf, 1) == 1)
3806 PerlIO_putc(PerlIO *f, int ch)
3809 return PerlIO_write(f, &buf, 1);
3814 PerlIO_puts(PerlIO *f, const char *s)
3816 STRLEN len = strlen(s);
3817 return PerlIO_write(f, s, len);
3820 #undef PerlIO_rewind
3822 PerlIO_rewind(PerlIO *f)
3824 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3828 #undef PerlIO_vprintf
3830 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3833 SV *sv = newSVpvn("", 0);
3839 Perl_va_copy(ap, apc);
3840 sv_vcatpvf(sv, fmt, &apc);
3842 sv_vcatpvf(sv, fmt, &ap);
3845 wrote = PerlIO_write(f, s, len);
3850 #undef PerlIO_printf
3852 PerlIO_printf(PerlIO *f, const char *fmt, ...)
3857 result = PerlIO_vprintf(f, fmt, ap);
3862 #undef PerlIO_stdoutf
3864 PerlIO_stdoutf(const char *fmt, ...)
3869 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3874 #undef PerlIO_tmpfile
3876 PerlIO_tmpfile(void)
3879 * I have no idea how portable mkstemp() is ...
3881 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
3884 FILE *stdio = PerlSIO_tmpfile();
3887 PerlIOSelf(PerlIO_push
3888 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3889 "w+", Nullsv), PerlIOStdio);
3895 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
3896 int fd = mkstemp(SvPVX(sv));
3899 f = PerlIO_fdopen(fd, "w+");
3901 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
3903 PerlLIO_unlink(SvPVX(sv));
3913 #endif /* USE_SFIO */
3914 #endif /* PERLIO_IS_STDIO */
3916 /*======================================================================================*/
3918 * Now some functions in terms of above which may be needed even if we are
3919 * not in true PerlIO mode
3923 #undef PerlIO_setpos
3925 PerlIO_setpos(PerlIO *f, SV *pos)
3930 Off_t *posn = (Off_t *) SvPV(pos, len);
3931 if (f && len == sizeof(Off_t))
3932 return PerlIO_seek(f, *posn, SEEK_SET);
3934 SETERRNO(EINVAL, SS$_IVCHAN);
3938 #undef PerlIO_setpos
3940 PerlIO_setpos(PerlIO *f, SV *pos)
3945 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
3946 if (f && len == sizeof(Fpos_t)) {
3947 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
3948 return fsetpos64(f, fpos);
3950 return fsetpos(f, fpos);
3954 SETERRNO(EINVAL, SS$_IVCHAN);
3960 #undef PerlIO_getpos
3962 PerlIO_getpos(PerlIO *f, SV *pos)
3965 Off_t posn = PerlIO_tell(f);
3966 sv_setpvn(pos, (char *) &posn, sizeof(posn));
3967 return (posn == (Off_t) - 1) ? -1 : 0;
3970 #undef PerlIO_getpos
3972 PerlIO_getpos(PerlIO *f, SV *pos)
3977 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
3978 code = fgetpos64(f, &fpos);
3980 code = fgetpos(f, &fpos);
3982 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
3987 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
3990 vprintf(char *pat, char *args)
3992 _doprnt(pat, args, stdout);
3993 return 0; /* wrong, but perl doesn't use the return
3998 vfprintf(FILE *fd, char *pat, char *args)
4000 _doprnt(pat, args, fd);
4001 return 0; /* wrong, but perl doesn't use the return
4007 #ifndef PerlIO_vsprintf
4009 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4011 int val = vsprintf(s, fmt, ap);
4013 if (strlen(s) >= (STRLEN) n) {
4015 (void) PerlIO_puts(Perl_error_log,
4016 "panic: sprintf overflow - memory corrupted!\n");
4024 #ifndef PerlIO_sprintf
4026 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4031 result = PerlIO_vsprintf(s, n, fmt, ap);