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)");
949 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
952 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
953 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
956 top = PerlIONext(top);
960 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
965 PerlIO__close(PerlIO *f)
968 return (*PerlIOBase(f)->tab->Close) (f);
970 SETERRNO(EBADF, SS$_IVCHAN);
975 #undef PerlIO_fdupopen
977 PerlIO_fdupopen(pTHX_ PerlIO *f)
981 int fd = PerlLIO_dup(PerlIO_fileno(f));
982 PerlIO *new = PerlIO_fdopen(fd, PerlIO_modestr(f, buf));
984 Off_t posn = PerlIO_tell(f);
985 PerlIO_seek(new, posn, SEEK_SET);
990 SETERRNO(EBADF, SS$_IVCHAN);
997 PerlIO_close(PerlIO *f)
1002 code = (*PerlIOBase(f)->tab->Close) (f);
1004 PerlIO_pop(aTHX_ f);
1010 #undef PerlIO_fileno
1012 PerlIO_fileno(PerlIO *f)
1015 return (*PerlIOBase(f)->tab->Fileno) (f);
1017 SETERRNO(EBADF, SS$_IVCHAN);
1023 PerlIO_context_layers(pTHX_ const char *mode)
1025 const char *type = NULL;
1027 * Need to supply default layer info from open.pm
1030 SV *layers = PL_curcop->cop_io;
1033 type = SvPV(layers, len);
1034 if (type && mode[0] != 'r') {
1036 * Skip to write part
1038 const char *s = strchr(type, 0);
1039 if (s && (s - type) < len) {
1048 static PerlIO_funcs *
1049 PerlIO_layer_from_ref(pTHX_ SV *sv)
1052 * For any scalar type load the handler which is bundled with perl
1054 if (SvTYPE(sv) < SVt_PVAV)
1055 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1058 * For other types allow if layer is known but don't try and load it
1060 switch (SvTYPE(sv)) {
1062 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1064 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1066 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1068 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1074 PerlIO_resolve_layers(pTHX_ const char *layers,
1075 const char *mode, int narg, SV **args)
1077 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1080 PerlIO_stdstreams(aTHX);
1084 * If it is a reference but not an object see if we have a handler
1087 if (SvROK(arg) && !sv_isobject(arg)) {
1088 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1090 def = PerlIO_list_alloc();
1091 PerlIO_list_push(def, handler, &PL_sv_undef);
1095 * Don't fail if handler cannot be found :Via(...) etc. may do
1096 * something sensible else we will just stringfy and open
1102 layers = PerlIO_context_layers(aTHX_ mode);
1103 if (layers && *layers) {
1107 av = PerlIO_list_alloc();
1108 for (i = 0; i < def->cur; i++) {
1109 PerlIO_list_push(av, def->array[i].funcs,
1116 PerlIO_parse_layers(aTHX_ av, layers);
1127 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1128 int imode, int perm, PerlIO *f, int narg, SV **args)
1130 if (!f && narg == 1 && *args == &PL_sv_undef) {
1131 if ((f = PerlIO_tmpfile())) {
1133 layers = PerlIO_context_layers(aTHX_ mode);
1134 if (layers && *layers)
1135 PerlIO_apply_layers(aTHX_ f, mode, layers);
1139 PerlIO_list_t *layera = NULL;
1141 PerlIO_funcs *tab = NULL;
1144 * This is "reopen" - it is not tested as perl does not use it
1148 layera = PerlIO_list_alloc();
1151 (l->tab->Getarg) ? (*l->tab->
1152 Getarg) (&l) : &PL_sv_undef;
1153 PerlIO_list_push(layera, l->tab, arg);
1154 l = *PerlIONext(&l);
1158 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1161 * Start at "top" of layer stack
1163 n = layera->cur - 1;
1165 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1174 * Found that layer 'n' can do opens - call it
1176 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1177 tab->name, layers, mode, fd, imode, perm, f, narg,
1179 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1182 if (n + 1 < layera->cur) {
1184 * More layers above the one that we used to open -
1187 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1194 PerlIO_list_free(layera);
1200 #undef PerlIO_fdopen
1202 PerlIO_fdopen(int fd, const char *mode)
1205 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1210 PerlIO_open(const char *path, const char *mode)
1213 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1214 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1217 #undef PerlIO_reopen
1219 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1222 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1223 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1228 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1231 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1233 SETERRNO(EBADF, SS$_IVCHAN);
1238 #undef PerlIO_unread
1240 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1243 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1245 SETERRNO(EBADF, SS$_IVCHAN);
1252 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1255 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1257 SETERRNO(EBADF, SS$_IVCHAN);
1264 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1267 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1269 SETERRNO(EBADF, SS$_IVCHAN);
1276 PerlIO_tell(PerlIO *f)
1279 return (*PerlIOBase(f)->tab->Tell) (f);
1281 SETERRNO(EBADF, SS$_IVCHAN);
1288 PerlIO_flush(PerlIO *f)
1292 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1293 if (tab && tab->Flush) {
1294 return (*tab->Flush) (f);
1297 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1298 SETERRNO(EBADF, SS$_IVCHAN);
1303 PerlIO_debug("Cannot flush f=%p\n", f);
1304 SETERRNO(EBADF, SS$_IVCHAN);
1310 * Is it good API design to do flush-all on NULL, a potentially
1311 * errorneous input? Maybe some magical value (PerlIO*
1312 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1313 * things on fflush(NULL), but should we be bound by their design
1316 PerlIO **table = &_perlio;
1318 while ((f = *table)) {
1320 table = (PerlIO **) (f++);
1321 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1322 if (*f && PerlIO_flush(f) != 0)
1332 PerlIOBase_flush_linebuf()
1334 PerlIO **table = &_perlio;
1336 while ((f = *table)) {
1338 table = (PerlIO **) (f++);
1339 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1342 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1343 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1352 PerlIO_fill(PerlIO *f)
1355 return (*PerlIOBase(f)->tab->Fill) (f);
1357 SETERRNO(EBADF, SS$_IVCHAN);
1362 #undef PerlIO_isutf8
1364 PerlIO_isutf8(PerlIO *f)
1367 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1369 SETERRNO(EBADF, SS$_IVCHAN);
1376 PerlIO_eof(PerlIO *f)
1379 return (*PerlIOBase(f)->tab->Eof) (f);
1381 SETERRNO(EBADF, SS$_IVCHAN);
1388 PerlIO_error(PerlIO *f)
1391 return (*PerlIOBase(f)->tab->Error) (f);
1393 SETERRNO(EBADF, SS$_IVCHAN);
1398 #undef PerlIO_clearerr
1400 PerlIO_clearerr(PerlIO *f)
1403 (*PerlIOBase(f)->tab->Clearerr) (f);
1405 SETERRNO(EBADF, SS$_IVCHAN);
1408 #undef PerlIO_setlinebuf
1410 PerlIO_setlinebuf(PerlIO *f)
1413 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1415 SETERRNO(EBADF, SS$_IVCHAN);
1418 #undef PerlIO_has_base
1420 PerlIO_has_base(PerlIO *f)
1423 return (PerlIOBase(f)->tab->Get_base != NULL);
1428 #undef PerlIO_fast_gets
1430 PerlIO_fast_gets(PerlIO *f)
1432 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1433 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1434 return (tab->Set_ptrcnt != NULL);
1439 #undef PerlIO_has_cntptr
1441 PerlIO_has_cntptr(PerlIO *f)
1444 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1445 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1450 #undef PerlIO_canset_cnt
1452 PerlIO_canset_cnt(PerlIO *f)
1455 PerlIOl *l = PerlIOBase(f);
1456 return (l->tab->Set_ptrcnt != NULL);
1461 #undef PerlIO_get_base
1463 PerlIO_get_base(PerlIO *f)
1466 return (*PerlIOBase(f)->tab->Get_base) (f);
1470 #undef PerlIO_get_bufsiz
1472 PerlIO_get_bufsiz(PerlIO *f)
1475 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1479 #undef PerlIO_get_ptr
1481 PerlIO_get_ptr(PerlIO *f)
1483 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1484 if (tab->Get_ptr == NULL)
1486 return (*tab->Get_ptr) (f);
1489 #undef PerlIO_get_cnt
1491 PerlIO_get_cnt(PerlIO *f)
1493 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1494 if (tab->Get_cnt == NULL)
1496 return (*tab->Get_cnt) (f);
1499 #undef PerlIO_set_cnt
1501 PerlIO_set_cnt(PerlIO *f, int cnt)
1503 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1506 #undef PerlIO_set_ptrcnt
1508 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1510 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1511 if (tab->Set_ptrcnt == NULL) {
1513 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1515 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1518 /*--------------------------------------------------------------------------------------*/
1520 * utf8 and raw dummy layers
1524 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1526 if (PerlIONext(f)) {
1528 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1529 PerlIO_pop(aTHX_ f);
1530 if (tab->kind & PERLIO_K_UTF8)
1531 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1533 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1539 PerlIO_funcs PerlIO_utf8 = {
1542 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1560 NULL, /* get_base */
1561 NULL, /* get_bufsiz */
1564 NULL, /* set_ptrcnt */
1567 PerlIO_funcs PerlIO_byte = {
1588 NULL, /* get_base */
1589 NULL, /* get_bufsiz */
1592 NULL, /* set_ptrcnt */
1596 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1597 IV n, const char *mode, int fd, int imode, int perm,
1598 PerlIO *old, int narg, SV **args)
1600 PerlIO_funcs *tab = PerlIO_default_btm();
1601 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1605 PerlIO_funcs PerlIO_raw = {
1626 NULL, /* get_base */
1627 NULL, /* get_bufsiz */
1630 NULL, /* set_ptrcnt */
1632 /*--------------------------------------------------------------------------------------*/
1633 /*--------------------------------------------------------------------------------------*/
1635 * "Methods" of the "base class"
1639 PerlIOBase_fileno(PerlIO *f)
1641 return PerlIO_fileno(PerlIONext(f));
1645 PerlIO_modestr(PerlIO *f, char *buf)
1648 IV flags = PerlIOBase(f)->flags;
1649 if (flags & PERLIO_F_APPEND) {
1651 if (flags & PERLIO_F_CANREAD) {
1655 else if (flags & PERLIO_F_CANREAD) {
1657 if (flags & PERLIO_F_CANWRITE)
1660 else if (flags & PERLIO_F_CANWRITE) {
1662 if (flags & PERLIO_F_CANREAD) {
1666 #if O_TEXT != O_BINARY
1667 if (!(flags & PERLIO_F_CRLF))
1675 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1677 PerlIOl *l = PerlIOBase(f);
1679 const char *omode = mode;
1682 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1683 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1684 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1685 if (tab->Set_ptrcnt != NULL)
1686 l->flags |= PERLIO_F_FASTGETS;
1688 if (*mode == '#' || *mode == 'I')
1692 l->flags |= PERLIO_F_CANREAD;
1695 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1698 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1701 SETERRNO(EINVAL, LIB$_INVARG);
1707 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1710 l->flags &= ~PERLIO_F_CRLF;
1713 l->flags |= PERLIO_F_CRLF;
1716 SETERRNO(EINVAL, LIB$_INVARG);
1723 l->flags |= l->next->flags &
1724 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1729 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1730 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1731 l->flags, PerlIO_modestr(f, temp));
1737 PerlIOBase_popped(PerlIO *f)
1743 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1747 * Save the position as current head considers it
1749 Off_t old = PerlIO_tell(f);
1751 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1752 PerlIOSelf(f, PerlIOBuf)->posn = old;
1753 done = PerlIOBuf_unread(f, vbuf, count);
1758 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1760 STDCHAR *buf = (STDCHAR *) vbuf;
1762 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1765 SSize_t avail = PerlIO_get_cnt(f);
1768 take = (count < avail) ? count : avail;
1770 STDCHAR *ptr = PerlIO_get_ptr(f);
1771 Copy(ptr, buf, take, STDCHAR);
1772 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1776 if (count > 0 && avail <= 0) {
1777 if (PerlIO_fill(f) != 0)
1781 return (buf - (STDCHAR *) vbuf);
1787 PerlIOBase_noop_ok(PerlIO *f)
1793 PerlIOBase_noop_fail(PerlIO *f)
1799 PerlIOBase_close(PerlIO *f)
1802 PerlIO *n = PerlIONext(f);
1803 if (PerlIO_flush(f) != 0)
1805 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1807 PerlIOBase(f)->flags &=
1808 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1813 PerlIOBase_eof(PerlIO *f)
1816 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1822 PerlIOBase_error(PerlIO *f)
1825 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1831 PerlIOBase_clearerr(PerlIO *f)
1834 PerlIO *n = PerlIONext(f);
1835 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1842 PerlIOBase_setlinebuf(PerlIO *f)
1845 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1849 /*--------------------------------------------------------------------------------------*/
1851 * Bottom-most level for UNIX-like case
1855 struct _PerlIO base; /* The generic part */
1856 int fd; /* UNIX like file descriptor */
1857 int oflags; /* open/fcntl flags */
1861 PerlIOUnix_oflags(const char *mode)
1864 if (*mode == 'I' || *mode == '#')
1869 if (*++mode == '+') {
1876 oflags = O_CREAT | O_TRUNC;
1877 if (*++mode == '+') {
1886 oflags = O_CREAT | O_APPEND;
1887 if (*++mode == '+') {
1900 else if (*mode == 't') {
1902 oflags &= ~O_BINARY;
1906 * Always open in binary mode
1909 if (*mode || oflags == -1) {
1910 SETERRNO(EINVAL, LIB$_INVARG);
1917 PerlIOUnix_fileno(PerlIO *f)
1919 return PerlIOSelf(f, PerlIOUnix)->fd;
1923 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
1925 IV code = PerlIOBase_pushed(f, mode, arg);
1926 if (*PerlIONext(f)) {
1927 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1928 s->fd = PerlIO_fileno(PerlIONext(f));
1930 * XXX could (or should) we retrieve the oflags from the open file
1931 * handle rather than believing the "mode" we are passed in? XXX
1932 * Should the value on NULL mode be 0 or -1?
1934 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1936 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1941 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1942 IV n, const char *mode, int fd, int imode,
1943 int perm, PerlIO *f, int narg, SV **args)
1946 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1947 (*PerlIOBase(f)->tab->Close) (f);
1950 char *path = SvPV_nolen(*args);
1954 imode = PerlIOUnix_oflags(mode);
1958 fd = PerlLIO_open3(path, imode, perm);
1966 f = PerlIO_allocate(aTHX);
1967 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1971 s = PerlIOSelf(f, PerlIOUnix);
1974 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1980 * FIXME: pop layers ???
1988 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
1991 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
1992 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1995 SSize_t len = PerlLIO_read(fd, vbuf, count);
1996 if (len >= 0 || errno != EINTR) {
1998 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
1999 else if (len == 0 && count != 0)
2000 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2008 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2011 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2013 SSize_t len = PerlLIO_write(fd, vbuf, count);
2014 if (len >= 0 || errno != EINTR) {
2016 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2024 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2028 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2029 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2030 return (new == (Off_t) - 1) ? -1 : 0;
2034 PerlIOUnix_tell(PerlIO *f)
2037 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2041 PerlIOUnix_close(PerlIO *f)
2044 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2046 while (PerlLIO_close(fd) != 0) {
2047 if (errno != EINTR) {
2054 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2059 PerlIO_funcs PerlIO_unix = {
2074 PerlIOBase_noop_ok, /* flush */
2075 PerlIOBase_noop_fail, /* fill */
2078 PerlIOBase_clearerr,
2079 PerlIOBase_setlinebuf,
2080 NULL, /* get_base */
2081 NULL, /* get_bufsiz */
2084 NULL, /* set_ptrcnt */
2087 /*--------------------------------------------------------------------------------------*/
2093 struct _PerlIO base;
2094 FILE *stdio; /* The stream */
2098 PerlIOStdio_fileno(PerlIO *f)
2101 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2105 PerlIOStdio_mode(const char *mode, char *tmode)
2111 if (O_BINARY != O_TEXT) {
2119 * This isn't used yet ...
2122 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2124 if (*PerlIONext(f)) {
2126 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2129 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2130 PerlIOStdio_mode(mode, tmode));
2136 return PerlIOBase_pushed(f, mode, arg);
2139 #undef PerlIO_importFILE
2141 PerlIO_importFILE(FILE *stdio, int fl)
2147 PerlIOSelf(PerlIO_push
2148 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2149 "r+", Nullsv), PerlIOStdio);
2156 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2157 IV n, const char *mode, int fd, int imode,
2158 int perm, PerlIO *f, int narg, SV **args)
2162 char *path = SvPV_nolen(*args);
2163 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2165 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2174 char *path = SvPV_nolen(*args);
2177 fd = PerlLIO_open3(path, imode, perm);
2180 FILE *stdio = PerlSIO_fopen(path, mode);
2183 PerlIOSelf(PerlIO_push
2184 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2185 (mode = PerlIOStdio_mode(mode, tmode)),
2203 stdio = PerlSIO_stdin;
2206 stdio = PerlSIO_stdout;
2209 stdio = PerlSIO_stderr;
2214 stdio = PerlSIO_fdopen(fd, mode =
2215 PerlIOStdio_mode(mode, tmode));
2219 PerlIOSelf(PerlIO_push
2220 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2221 mode, PerlIOArg), PerlIOStdio);
2231 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2234 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2237 STDCHAR *buf = (STDCHAR *) vbuf;
2239 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2240 * stdio does not do that for fread()
2242 int ch = PerlSIO_fgetc(s);
2249 got = PerlSIO_fread(vbuf, 1, count, s);
2254 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2257 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2258 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2261 int ch = *buf-- & 0xff;
2262 if (PerlSIO_ungetc(ch, s) != ch)
2271 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2274 return PerlSIO_fwrite(vbuf, 1, count,
2275 PerlIOSelf(f, PerlIOStdio)->stdio);
2279 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2282 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2283 return PerlSIO_fseek(stdio, offset, whence);
2287 PerlIOStdio_tell(PerlIO *f)
2290 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2291 return PerlSIO_ftell(stdio);
2295 PerlIOStdio_close(PerlIO *f)
2298 #ifdef SOCKS5_VERSION_NAME
2300 Sock_size_t optlen = sizeof(int);
2302 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2304 #ifdef SOCKS5_VERSION_NAME
2306 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2308 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2310 PerlSIO_fclose(stdio)
2317 PerlIOStdio_flush(PerlIO *f)
2320 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2321 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2322 return PerlSIO_fflush(stdio);
2327 * FIXME: This discards ungetc() and pre-read stuff which is not
2328 * right if this is just a "sync" from a layer above Suspect right
2329 * design is to do _this_ but not have layer above flush this
2330 * layer read-to-read
2333 * Not writeable - sync by attempting a seek
2336 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2344 PerlIOStdio_fill(PerlIO *f)
2347 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2350 * fflush()ing read-only streams can cause trouble on some stdio-s
2352 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2353 if (PerlSIO_fflush(stdio) != 0)
2356 c = PerlSIO_fgetc(stdio);
2357 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2363 PerlIOStdio_eof(PerlIO *f)
2366 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2370 PerlIOStdio_error(PerlIO *f)
2373 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2377 PerlIOStdio_clearerr(PerlIO *f)
2380 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2384 PerlIOStdio_setlinebuf(PerlIO *f)
2387 #ifdef HAS_SETLINEBUF
2388 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2390 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2396 PerlIOStdio_get_base(PerlIO *f)
2399 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2400 return PerlSIO_get_base(stdio);
2404 PerlIOStdio_get_bufsiz(PerlIO *f)
2407 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2408 return PerlSIO_get_bufsiz(stdio);
2412 #ifdef USE_STDIO_PTR
2414 PerlIOStdio_get_ptr(PerlIO *f)
2417 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2418 return PerlSIO_get_ptr(stdio);
2422 PerlIOStdio_get_cnt(PerlIO *f)
2425 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2426 return PerlSIO_get_cnt(stdio);
2430 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2432 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2435 #ifdef STDIO_PTR_LVALUE
2436 PerlSIO_set_ptr(stdio, ptr);
2437 #ifdef STDIO_PTR_LVAL_SETS_CNT
2438 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2440 assert(PerlSIO_get_cnt(stdio) == (cnt));
2443 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2445 * Setting ptr _does_ change cnt - we are done
2449 #else /* STDIO_PTR_LVALUE */
2451 #endif /* STDIO_PTR_LVALUE */
2454 * Now (or only) set cnt
2456 #ifdef STDIO_CNT_LVALUE
2457 PerlSIO_set_cnt(stdio, cnt);
2458 #else /* STDIO_CNT_LVALUE */
2459 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2460 PerlSIO_set_ptr(stdio,
2461 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2463 #else /* STDIO_PTR_LVAL_SETS_CNT */
2465 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2466 #endif /* STDIO_CNT_LVALUE */
2471 PerlIO_funcs PerlIO_stdio = {
2473 sizeof(PerlIOStdio),
2490 PerlIOStdio_clearerr,
2491 PerlIOStdio_setlinebuf,
2493 PerlIOStdio_get_base,
2494 PerlIOStdio_get_bufsiz,
2499 #ifdef USE_STDIO_PTR
2500 PerlIOStdio_get_ptr,
2501 PerlIOStdio_get_cnt,
2502 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2503 PerlIOStdio_set_ptrcnt
2504 #else /* STDIO_PTR_LVALUE */
2506 #endif /* STDIO_PTR_LVALUE */
2507 #else /* USE_STDIO_PTR */
2511 #endif /* USE_STDIO_PTR */
2514 #undef PerlIO_exportFILE
2516 PerlIO_exportFILE(PerlIO *f, int fl)
2520 stdio = fdopen(PerlIO_fileno(f), "r+");
2524 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2531 #undef PerlIO_findFILE
2533 PerlIO_findFILE(PerlIO *f)
2537 if (l->tab == &PerlIO_stdio) {
2538 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2541 l = *PerlIONext(&l);
2543 return PerlIO_exportFILE(f, 0);
2546 #undef PerlIO_releaseFILE
2548 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2552 /*--------------------------------------------------------------------------------------*/
2554 * perlio buffer layer
2558 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2561 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2562 int fd = PerlIO_fileno(f);
2564 if (fd >= 0 && PerlLIO_isatty(fd)) {
2565 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2567 posn = PerlIO_tell(PerlIONext(f));
2568 if (posn != (Off_t) - 1) {
2571 return PerlIOBase_pushed(f, mode, arg);
2575 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2576 IV n, const char *mode, int fd, int imode, int perm,
2577 PerlIO *f, int narg, SV **args)
2580 PerlIO *next = PerlIONext(f);
2582 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2584 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2587 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2593 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2601 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2604 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2605 fd = PerlIO_fileno(f);
2606 #if O_BINARY != O_TEXT
2608 * do something about failing setmode()? --jhi
2610 PerlLIO_setmode(fd, O_BINARY);
2612 if (init && fd == 2) {
2614 * Initial stderr is unbuffered
2616 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2624 * This "flush" is akin to sfio's sync in that it handles files in either
2625 * read or write state
2628 PerlIOBuf_flush(PerlIO *f)
2630 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2632 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2634 * write() the buffer
2636 STDCHAR *buf = b->buf;
2638 PerlIO *n = PerlIONext(f);
2639 while (p < b->ptr) {
2640 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2644 else if (count < 0 || PerlIO_error(n)) {
2645 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2650 b->posn += (p - buf);
2652 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2653 STDCHAR *buf = PerlIO_get_base(f);
2655 * Note position change
2657 b->posn += (b->ptr - buf);
2658 if (b->ptr < b->end) {
2660 * We did not consume all of it
2662 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2663 b->posn = PerlIO_tell(PerlIONext(f));
2667 b->ptr = b->end = b->buf;
2668 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2670 * FIXME: Is this right for read case ?
2672 if (PerlIO_flush(PerlIONext(f)) != 0)
2678 PerlIOBuf_fill(PerlIO *f)
2680 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2681 PerlIO *n = PerlIONext(f);
2684 * FIXME: doing the down-stream flush is a bad idea if it causes
2685 * pre-read data in stdio buffer to be discarded but this is too
2686 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2687 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2689 if (PerlIO_flush(f) != 0)
2691 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2692 PerlIOBase_flush_linebuf();
2695 PerlIO_get_base(f); /* allocate via vtable */
2697 b->ptr = b->end = b->buf;
2698 if (PerlIO_fast_gets(n)) {
2700 * Layer below is also buffered We do _NOT_ want to call its
2701 * ->Read() because that will loop till it gets what we asked for
2702 * which may hang on a pipe etc. Instead take anything it has to
2703 * hand, or ask it to fill _once_.
2705 avail = PerlIO_get_cnt(n);
2707 avail = PerlIO_fill(n);
2709 avail = PerlIO_get_cnt(n);
2711 if (!PerlIO_error(n) && PerlIO_eof(n))
2716 STDCHAR *ptr = PerlIO_get_ptr(n);
2717 SSize_t cnt = avail;
2718 if (avail > b->bufsiz)
2720 Copy(ptr, b->buf, avail, STDCHAR);
2721 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2725 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2729 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2731 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2734 b->end = b->buf + avail;
2735 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2740 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2742 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2746 return PerlIOBase_read(f, vbuf, count);
2752 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2754 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2755 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2758 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2763 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2765 * Buffer is already a read buffer, we can overwrite any chars
2766 * which have been read back to buffer start
2768 avail = (b->ptr - b->buf);
2772 * Buffer is idle, set it up so whole buffer is available for
2776 b->end = b->buf + avail;
2778 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2780 * Buffer extends _back_ from where we are now
2782 b->posn -= b->bufsiz;
2784 if (avail > (SSize_t) count) {
2786 * If we have space for more than count, just move count
2794 * In simple stdio-like ungetc() case chars will be already
2797 if (buf != b->ptr) {
2798 Copy(buf, b->ptr, avail, STDCHAR);
2802 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2809 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2811 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2812 const STDCHAR *buf = (const STDCHAR *) vbuf;
2816 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2819 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2820 if ((SSize_t) count < avail)
2822 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2823 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2838 Copy(buf, b->ptr, avail, STDCHAR);
2845 if (b->ptr >= (b->buf + b->bufsiz))
2848 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2854 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2857 if ((code = PerlIO_flush(f)) == 0) {
2858 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2859 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2860 code = PerlIO_seek(PerlIONext(f), offset, whence);
2862 b->posn = PerlIO_tell(PerlIONext(f));
2869 PerlIOBuf_tell(PerlIO *f)
2871 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2873 * b->posn is file position where b->buf was read, or will be written
2875 Off_t posn = b->posn;
2878 * If buffer is valid adjust position by amount in buffer
2880 posn += (b->ptr - b->buf);
2886 PerlIOBuf_close(PerlIO *f)
2888 IV code = PerlIOBase_close(f);
2889 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2890 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2891 PerlMemShared_free(b->buf);
2894 b->ptr = b->end = b->buf;
2895 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2900 PerlIOBuf_get_ptr(PerlIO *f)
2902 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2909 PerlIOBuf_get_cnt(PerlIO *f)
2911 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2914 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
2915 return (b->end - b->ptr);
2920 PerlIOBuf_get_base(PerlIO *f)
2922 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2926 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
2928 b->buf = (STDCHAR *) & b->oneword;
2929 b->bufsiz = sizeof(b->oneword);
2938 PerlIOBuf_bufsiz(PerlIO *f)
2940 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2943 return (b->end - b->buf);
2947 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2949 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2953 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
2955 assert(PerlIO_get_cnt(f) == cnt);
2956 assert(b->ptr >= b->buf);
2958 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2961 PerlIO_funcs PerlIO_perlio = {
2980 PerlIOBase_clearerr,
2981 PerlIOBase_setlinebuf,
2986 PerlIOBuf_set_ptrcnt,
2989 /*--------------------------------------------------------------------------------------*/
2991 * Temp layer to hold unread chars when cannot do it any other way
2995 PerlIOPending_fill(PerlIO *f)
2998 * Should never happen
3005 PerlIOPending_close(PerlIO *f)
3008 * A tad tricky - flush pops us, then we close new top
3011 return PerlIO_close(f);
3015 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3018 * A tad tricky - flush pops us, then we seek new top
3021 return PerlIO_seek(f, offset, whence);
3026 PerlIOPending_flush(PerlIO *f)
3029 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3030 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3031 PerlMemShared_free(b->buf);
3034 PerlIO_pop(aTHX_ f);
3039 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3045 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3050 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3052 IV code = PerlIOBase_pushed(f, mode, arg);
3053 PerlIOl *l = PerlIOBase(f);
3055 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3056 * etc. get muddled when it changes mid-string when we auto-pop.
3058 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3059 (PerlIOBase(PerlIONext(f))->
3060 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3065 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3067 SSize_t avail = PerlIO_get_cnt(f);
3072 got = PerlIOBuf_read(f, vbuf, avail);
3073 if (got >= 0 && got < count) {
3075 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3076 if (more >= 0 || got == 0)
3082 PerlIO_funcs PerlIO_pending = {
3086 PerlIOPending_pushed,
3096 PerlIOPending_close,
3097 PerlIOPending_flush,
3101 PerlIOBase_clearerr,
3102 PerlIOBase_setlinebuf,
3107 PerlIOPending_set_ptrcnt,
3112 /*--------------------------------------------------------------------------------------*/
3114 * crlf - translation On read translate CR,LF to "\n" we do this by
3115 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3116 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3120 PerlIOBuf base; /* PerlIOBuf stuff */
3121 STDCHAR *nl; /* Position of crlf we "lied" about in the
3126 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3129 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3130 code = PerlIOBuf_pushed(f, mode, arg);
3132 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3133 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3134 PerlIOBase(f)->flags);
3141 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3143 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3148 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3149 return PerlIOBuf_unread(f, vbuf, count);
3151 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3152 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3154 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3159 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3160 b->end = b->ptr = b->buf + b->bufsiz;
3161 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3162 b->posn -= b->bufsiz;
3164 while (count > 0 && b->ptr > b->buf) {
3167 if (b->ptr - 2 >= b->buf) {
3190 PerlIOCrlf_get_cnt(PerlIO *f)
3192 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3195 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3196 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3197 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3198 STDCHAR *nl = b->ptr;
3200 while (nl < b->end && *nl != 0xd)
3202 if (nl < b->end && *nl == 0xd) {
3204 if (nl + 1 < b->end) {
3211 * Not CR,LF but just CR
3219 * Blast - found CR as last char in buffer
3223 * They may not care, defer work as long as
3226 return (nl - b->ptr);
3230 b->ptr++; /* say we have read it as far as
3231 * flush() is concerned */
3232 b->buf++; /* Leave space an front of buffer */
3233 b->bufsiz--; /* Buffer is thus smaller */
3234 code = PerlIO_fill(f); /* Fetch some more */
3235 b->bufsiz++; /* Restore size for next time */
3236 b->buf--; /* Point at space */
3237 b->ptr = nl = b->buf; /* Which is what we hand
3239 b->posn--; /* Buffer starts here */
3240 *nl = 0xd; /* Fill in the CR */
3242 goto test; /* fill() call worked */
3244 * CR at EOF - just fall through
3250 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3256 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3258 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3259 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3260 IV flags = PerlIOBase(f)->flags;
3268 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3275 * Test code - delete when it works ...
3282 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3289 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3290 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3297 * They have taken what we lied about
3305 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3309 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3311 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3312 return PerlIOBuf_write(f, vbuf, count);
3314 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3315 const STDCHAR *buf = (const STDCHAR *) vbuf;
3316 const STDCHAR *ebuf = buf + count;
3319 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3321 while (buf < ebuf) {
3322 STDCHAR *eptr = b->buf + b->bufsiz;
3323 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3324 while (buf < ebuf && b->ptr < eptr) {
3326 if ((b->ptr + 2) > eptr) {
3334 *(b->ptr)++ = 0xd; /* CR */
3335 *(b->ptr)++ = 0xa; /* LF */
3337 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3347 if (b->ptr >= eptr) {
3353 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3355 return (buf - (STDCHAR *) vbuf);
3360 PerlIOCrlf_flush(PerlIO *f)
3362 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3367 return PerlIOBuf_flush(f);
3370 PerlIO_funcs PerlIO_crlf = {
3373 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3375 PerlIOBase_noop_ok, /* popped */
3379 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3381 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3382 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3390 PerlIOBase_clearerr,
3391 PerlIOBase_setlinebuf,
3396 PerlIOCrlf_set_ptrcnt,
3400 /*--------------------------------------------------------------------------------------*/
3402 * mmap as "buffer" layer
3406 PerlIOBuf base; /* PerlIOBuf stuff */
3407 Mmap_t mptr; /* Mapped address */
3408 Size_t len; /* mapped length */
3409 STDCHAR *bbuf; /* malloced buffer if map fails */
3412 static size_t page_size = 0;
3415 PerlIOMmap_map(PerlIO *f)
3418 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3419 IV flags = PerlIOBase(f)->flags;
3423 if (flags & PERLIO_F_CANREAD) {
3424 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3425 int fd = PerlIO_fileno(f);
3427 code = fstat(fd, &st);
3428 if (code == 0 && S_ISREG(st.st_mode)) {
3429 SSize_t len = st.st_size - b->posn;
3433 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3435 SETERRNO(0, SS$_NORMAL);
3436 # ifdef _SC_PAGESIZE
3437 page_size = sysconf(_SC_PAGESIZE);
3439 page_size = sysconf(_SC_PAGE_SIZE);
3441 if ((long) page_size < 0) {
3446 (void) SvUPGRADE(error, SVt_PV);
3447 msg = SvPVx(error, n_a);
3448 Perl_croak(aTHX_ "panic: sysconf: %s",
3453 "panic: sysconf: pagesize unknown");
3457 # ifdef HAS_GETPAGESIZE
3458 page_size = getpagesize();
3460 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3461 page_size = PAGESIZE; /* compiletime, bad */
3465 if ((IV) page_size <= 0)
3466 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3471 * This is a hack - should never happen - open should
3474 b->posn = PerlIO_tell(PerlIONext(f));
3476 posn = (b->posn / page_size) * page_size;
3477 len = st.st_size - posn;
3478 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3479 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3480 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3481 madvise(m->mptr, len, MADV_SEQUENTIAL);
3483 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3484 madvise(m->mptr, len, MADV_WILLNEED);
3486 PerlIOBase(f)->flags =
3487 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3488 b->end = ((STDCHAR *) m->mptr) + len;
3489 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3498 PerlIOBase(f)->flags =
3499 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3501 b->ptr = b->end = b->ptr;
3510 PerlIOMmap_unmap(PerlIO *f)
3512 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3513 PerlIOBuf *b = &m->base;
3517 code = munmap(m->mptr, m->len);
3521 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3524 b->ptr = b->end = b->buf;
3525 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3531 PerlIOMmap_get_base(PerlIO *f)
3533 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3534 PerlIOBuf *b = &m->base;
3535 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3537 * Already have a readbuffer in progress
3543 * We have a write buffer or flushed PerlIOBuf read buffer
3545 m->bbuf = b->buf; /* save it in case we need it again */
3546 b->buf = NULL; /* Clear to trigger below */
3549 PerlIOMmap_map(f); /* Try and map it */
3552 * Map did not work - recover PerlIOBuf buffer if we have one
3557 b->ptr = b->end = b->buf;
3560 return PerlIOBuf_get_base(f);
3564 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3566 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3567 PerlIOBuf *b = &m->base;
3568 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3570 if (b->ptr && (b->ptr - count) >= b->buf
3571 && memEQ(b->ptr - count, vbuf, count)) {
3573 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3578 * Loose the unwritable mapped buffer
3582 * If flush took the "buffer" see if we have one from before
3584 if (!b->buf && m->bbuf)
3587 PerlIOBuf_get_base(f);
3591 return PerlIOBuf_unread(f, vbuf, count);
3595 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3597 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3598 PerlIOBuf *b = &m->base;
3599 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3601 * No, or wrong sort of, buffer
3604 if (PerlIOMmap_unmap(f) != 0)
3608 * If unmap took the "buffer" see if we have one from before
3610 if (!b->buf && m->bbuf)
3613 PerlIOBuf_get_base(f);
3617 return PerlIOBuf_write(f, vbuf, count);
3621 PerlIOMmap_flush(PerlIO *f)
3623 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3624 PerlIOBuf *b = &m->base;
3625 IV code = PerlIOBuf_flush(f);
3627 * Now we are "synced" at PerlIOBuf level
3634 if (PerlIOMmap_unmap(f) != 0)
3639 * We seem to have a PerlIOBuf buffer which was not mapped
3640 * remember it in case we need one later
3649 PerlIOMmap_fill(PerlIO *f)
3651 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3652 IV code = PerlIO_flush(f);
3653 if (code == 0 && !b->buf) {
3654 code = PerlIOMmap_map(f);
3656 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3657 code = PerlIOBuf_fill(f);
3663 PerlIOMmap_close(PerlIO *f)
3665 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3666 PerlIOBuf *b = &m->base;
3667 IV code = PerlIO_flush(f);
3671 b->ptr = b->end = b->buf;
3673 if (PerlIOBuf_close(f) != 0)
3679 PerlIO_funcs PerlIO_mmap = {
3698 PerlIOBase_clearerr,
3699 PerlIOBase_setlinebuf,
3700 PerlIOMmap_get_base,
3704 PerlIOBuf_set_ptrcnt,
3707 #endif /* HAS_MMAP */
3714 call_atexit(PerlIO_cleanup_layers, NULL);
3718 atexit(&PerlIO_cleanup);
3729 PerlIO_stdstreams(aTHX);
3734 #undef PerlIO_stdout
3740 PerlIO_stdstreams(aTHX);
3745 #undef PerlIO_stderr
3751 PerlIO_stdstreams(aTHX);
3756 /*--------------------------------------------------------------------------------------*/
3758 #undef PerlIO_getname
3760 PerlIO_getname(PerlIO *f, char *buf)
3765 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3767 name = fgetname(stdio, buf);
3769 Perl_croak(aTHX_ "Don't know how to get file name");
3775 /*--------------------------------------------------------------------------------------*/
3777 * Functions which can be called on any kind of PerlIO implemented in
3783 PerlIO_getc(PerlIO *f)
3786 SSize_t count = PerlIO_read(f, buf, 1);
3788 return (unsigned char) buf[0];
3793 #undef PerlIO_ungetc
3795 PerlIO_ungetc(PerlIO *f, int ch)
3799 if (PerlIO_unread(f, &buf, 1) == 1)
3807 PerlIO_putc(PerlIO *f, int ch)
3810 return PerlIO_write(f, &buf, 1);
3815 PerlIO_puts(PerlIO *f, const char *s)
3817 STRLEN len = strlen(s);
3818 return PerlIO_write(f, s, len);
3821 #undef PerlIO_rewind
3823 PerlIO_rewind(PerlIO *f)
3825 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3829 #undef PerlIO_vprintf
3831 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3834 SV *sv = newSVpvn("", 0);
3840 Perl_va_copy(ap, apc);
3841 sv_vcatpvf(sv, fmt, &apc);
3843 sv_vcatpvf(sv, fmt, &ap);
3846 wrote = PerlIO_write(f, s, len);
3851 #undef PerlIO_printf
3853 PerlIO_printf(PerlIO *f, const char *fmt, ...)
3858 result = PerlIO_vprintf(f, fmt, ap);
3863 #undef PerlIO_stdoutf
3865 PerlIO_stdoutf(const char *fmt, ...)
3870 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3875 #undef PerlIO_tmpfile
3877 PerlIO_tmpfile(void)
3880 * I have no idea how portable mkstemp() is ...
3882 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
3885 FILE *stdio = PerlSIO_tmpfile();
3888 PerlIOSelf(PerlIO_push
3889 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3890 "w+", Nullsv), PerlIOStdio);
3896 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
3897 int fd = mkstemp(SvPVX(sv));
3900 f = PerlIO_fdopen(fd, "w+");
3902 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
3904 PerlLIO_unlink(SvPVX(sv));
3914 #endif /* USE_SFIO */
3915 #endif /* PERLIO_IS_STDIO */
3917 /*======================================================================================*/
3919 * Now some functions in terms of above which may be needed even if we are
3920 * not in true PerlIO mode
3924 #undef PerlIO_setpos
3926 PerlIO_setpos(PerlIO *f, SV *pos)
3931 Off_t *posn = (Off_t *) SvPV(pos, len);
3932 if (f && len == sizeof(Off_t))
3933 return PerlIO_seek(f, *posn, SEEK_SET);
3935 SETERRNO(EINVAL, SS$_IVCHAN);
3939 #undef PerlIO_setpos
3941 PerlIO_setpos(PerlIO *f, SV *pos)
3946 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
3947 if (f && len == sizeof(Fpos_t)) {
3948 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
3949 return fsetpos64(f, fpos);
3951 return fsetpos(f, fpos);
3955 SETERRNO(EINVAL, SS$_IVCHAN);
3961 #undef PerlIO_getpos
3963 PerlIO_getpos(PerlIO *f, SV *pos)
3966 Off_t posn = PerlIO_tell(f);
3967 sv_setpvn(pos, (char *) &posn, sizeof(posn));
3968 return (posn == (Off_t) - 1) ? -1 : 0;
3971 #undef PerlIO_getpos
3973 PerlIO_getpos(PerlIO *f, SV *pos)
3978 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
3979 code = fgetpos64(f, &fpos);
3981 code = fgetpos(f, &fpos);
3983 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
3988 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
3991 vprintf(char *pat, char *args)
3993 _doprnt(pat, args, stdout);
3994 return 0; /* wrong, but perl doesn't use the return
3999 vfprintf(FILE *fd, char *pat, char *args)
4001 _doprnt(pat, args, fd);
4002 return 0; /* wrong, but perl doesn't use the return
4008 #ifndef PerlIO_vsprintf
4010 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4012 int val = vsprintf(s, fmt, ap);
4014 if (strlen(s) >= (STRLEN) n) {
4016 (void) PerlIO_puts(Perl_error_log,
4017 "panic: sprintf overflow - memory corrupted!\n");
4025 #ifndef PerlIO_sprintf
4027 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4032 result = PerlIO_vsprintf(s, n, fmt, ap);