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$_IVCHAN);
975 #undef PerlIO_fdupopen
977 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
980 PerlIO_funcs *tab = PerlIOBase(f)->tab;
982 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
983 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
987 SETERRNO(EBADF, SS$_IVCHAN);
994 PerlIO_close(PerlIO *f)
999 code = (*PerlIOBase(f)->tab->Close) (f);
1001 PerlIO_pop(aTHX_ f);
1007 #undef PerlIO_fileno
1009 PerlIO_fileno(PerlIO *f)
1012 return (*PerlIOBase(f)->tab->Fileno) (f);
1014 SETERRNO(EBADF, SS$_IVCHAN);
1020 PerlIO_context_layers(pTHX_ const char *mode)
1022 const char *type = NULL;
1024 * Need to supply default layer info from open.pm
1027 SV *layers = PL_curcop->cop_io;
1030 type = SvPV(layers, len);
1031 if (type && mode[0] != 'r') {
1033 * Skip to write part
1035 const char *s = strchr(type, 0);
1036 if (s && (s - type) < len) {
1045 static PerlIO_funcs *
1046 PerlIO_layer_from_ref(pTHX_ SV *sv)
1049 * For any scalar type load the handler which is bundled with perl
1051 if (SvTYPE(sv) < SVt_PVAV)
1052 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1055 * For other types allow if layer is known but don't try and load it
1057 switch (SvTYPE(sv)) {
1059 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1061 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1063 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1065 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1071 PerlIO_resolve_layers(pTHX_ const char *layers,
1072 const char *mode, int narg, SV **args)
1074 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1077 PerlIO_stdstreams(aTHX);
1081 * If it is a reference but not an object see if we have a handler
1084 if (SvROK(arg) && !sv_isobject(arg)) {
1085 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1087 def = PerlIO_list_alloc();
1088 PerlIO_list_push(def, handler, &PL_sv_undef);
1092 * Don't fail if handler cannot be found :Via(...) etc. may do
1093 * something sensible else we will just stringfy and open
1099 layers = PerlIO_context_layers(aTHX_ mode);
1100 if (layers && *layers) {
1104 av = PerlIO_list_alloc();
1105 for (i = 0; i < def->cur; i++) {
1106 PerlIO_list_push(av, def->array[i].funcs,
1113 PerlIO_parse_layers(aTHX_ av, layers);
1124 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1125 int imode, int perm, PerlIO *f, int narg, SV **args)
1127 if (!f && narg == 1 && *args == &PL_sv_undef) {
1128 if ((f = PerlIO_tmpfile())) {
1130 layers = PerlIO_context_layers(aTHX_ mode);
1131 if (layers && *layers)
1132 PerlIO_apply_layers(aTHX_ f, mode, layers);
1136 PerlIO_list_t *layera = NULL;
1138 PerlIO_funcs *tab = NULL;
1141 * This is "reopen" - it is not tested as perl does not use it
1145 layera = PerlIO_list_alloc();
1148 (l->tab->Getarg) ? (*l->tab->
1149 Getarg) (&l) : &PL_sv_undef;
1150 PerlIO_list_push(layera, l->tab, arg);
1151 l = *PerlIONext(&l);
1155 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1158 * Start at "top" of layer stack
1160 n = layera->cur - 1;
1162 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1171 * Found that layer 'n' can do opens - call it
1173 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1174 tab->name, layers, mode, fd, imode, perm, f, narg,
1176 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1179 if (n + 1 < layera->cur) {
1181 * More layers above the one that we used to open -
1184 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1191 PerlIO_list_free(layera);
1197 #undef PerlIO_fdopen
1199 PerlIO_fdopen(int fd, const char *mode)
1202 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1207 PerlIO_open(const char *path, const char *mode)
1210 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1211 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1214 #undef PerlIO_reopen
1216 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1219 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1220 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1225 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1228 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1230 SETERRNO(EBADF, SS$_IVCHAN);
1235 #undef PerlIO_unread
1237 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1240 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1242 SETERRNO(EBADF, SS$_IVCHAN);
1249 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1252 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1254 SETERRNO(EBADF, SS$_IVCHAN);
1261 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1264 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1266 SETERRNO(EBADF, SS$_IVCHAN);
1273 PerlIO_tell(PerlIO *f)
1276 return (*PerlIOBase(f)->tab->Tell) (f);
1278 SETERRNO(EBADF, SS$_IVCHAN);
1285 PerlIO_flush(PerlIO *f)
1289 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1290 if (tab && tab->Flush) {
1291 return (*tab->Flush) (f);
1294 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1295 SETERRNO(EBADF, SS$_IVCHAN);
1300 PerlIO_debug("Cannot flush f=%p\n", f);
1301 SETERRNO(EBADF, SS$_IVCHAN);
1307 * Is it good API design to do flush-all on NULL, a potentially
1308 * errorneous input? Maybe some magical value (PerlIO*
1309 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1310 * things on fflush(NULL), but should we be bound by their design
1313 PerlIO **table = &_perlio;
1315 while ((f = *table)) {
1317 table = (PerlIO **) (f++);
1318 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1319 if (*f && PerlIO_flush(f) != 0)
1329 PerlIOBase_flush_linebuf()
1331 PerlIO **table = &_perlio;
1333 while ((f = *table)) {
1335 table = (PerlIO **) (f++);
1336 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1339 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1340 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1349 PerlIO_fill(PerlIO *f)
1352 return (*PerlIOBase(f)->tab->Fill) (f);
1354 SETERRNO(EBADF, SS$_IVCHAN);
1359 #undef PerlIO_isutf8
1361 PerlIO_isutf8(PerlIO *f)
1364 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1366 SETERRNO(EBADF, SS$_IVCHAN);
1373 PerlIO_eof(PerlIO *f)
1376 return (*PerlIOBase(f)->tab->Eof) (f);
1378 SETERRNO(EBADF, SS$_IVCHAN);
1385 PerlIO_error(PerlIO *f)
1388 return (*PerlIOBase(f)->tab->Error) (f);
1390 SETERRNO(EBADF, SS$_IVCHAN);
1395 #undef PerlIO_clearerr
1397 PerlIO_clearerr(PerlIO *f)
1400 (*PerlIOBase(f)->tab->Clearerr) (f);
1402 SETERRNO(EBADF, SS$_IVCHAN);
1405 #undef PerlIO_setlinebuf
1407 PerlIO_setlinebuf(PerlIO *f)
1410 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1412 SETERRNO(EBADF, SS$_IVCHAN);
1415 #undef PerlIO_has_base
1417 PerlIO_has_base(PerlIO *f)
1420 return (PerlIOBase(f)->tab->Get_base != NULL);
1425 #undef PerlIO_fast_gets
1427 PerlIO_fast_gets(PerlIO *f)
1429 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1430 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1431 return (tab->Set_ptrcnt != NULL);
1436 #undef PerlIO_has_cntptr
1438 PerlIO_has_cntptr(PerlIO *f)
1441 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1442 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1447 #undef PerlIO_canset_cnt
1449 PerlIO_canset_cnt(PerlIO *f)
1452 PerlIOl *l = PerlIOBase(f);
1453 return (l->tab->Set_ptrcnt != NULL);
1458 #undef PerlIO_get_base
1460 PerlIO_get_base(PerlIO *f)
1463 return (*PerlIOBase(f)->tab->Get_base) (f);
1467 #undef PerlIO_get_bufsiz
1469 PerlIO_get_bufsiz(PerlIO *f)
1472 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1476 #undef PerlIO_get_ptr
1478 PerlIO_get_ptr(PerlIO *f)
1480 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1481 if (tab->Get_ptr == NULL)
1483 return (*tab->Get_ptr) (f);
1486 #undef PerlIO_get_cnt
1488 PerlIO_get_cnt(PerlIO *f)
1490 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1491 if (tab->Get_cnt == NULL)
1493 return (*tab->Get_cnt) (f);
1496 #undef PerlIO_set_cnt
1498 PerlIO_set_cnt(PerlIO *f, int cnt)
1500 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1503 #undef PerlIO_set_ptrcnt
1505 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1507 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1508 if (tab->Set_ptrcnt == NULL) {
1510 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1512 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1515 /*--------------------------------------------------------------------------------------*/
1517 * utf8 and raw dummy layers
1521 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1523 if (PerlIONext(f)) {
1525 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1526 PerlIO_pop(aTHX_ f);
1527 if (tab->kind & PERLIO_K_UTF8)
1528 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1530 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1536 PerlIO_funcs PerlIO_utf8 = {
1539 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1557 NULL, /* get_base */
1558 NULL, /* get_bufsiz */
1561 NULL, /* set_ptrcnt */
1564 PerlIO_funcs PerlIO_byte = {
1585 NULL, /* get_base */
1586 NULL, /* get_bufsiz */
1589 NULL, /* set_ptrcnt */
1593 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1594 IV n, const char *mode, int fd, int imode, int perm,
1595 PerlIO *old, int narg, SV **args)
1597 PerlIO_funcs *tab = PerlIO_default_btm();
1598 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1602 PerlIO_funcs PerlIO_raw = {
1623 NULL, /* get_base */
1624 NULL, /* get_bufsiz */
1627 NULL, /* set_ptrcnt */
1629 /*--------------------------------------------------------------------------------------*/
1630 /*--------------------------------------------------------------------------------------*/
1632 * "Methods" of the "base class"
1636 PerlIOBase_fileno(PerlIO *f)
1638 return PerlIO_fileno(PerlIONext(f));
1642 PerlIO_modestr(PerlIO *f, char *buf)
1645 IV flags = PerlIOBase(f)->flags;
1646 if (flags & PERLIO_F_APPEND) {
1648 if (flags & PERLIO_F_CANREAD) {
1652 else if (flags & PERLIO_F_CANREAD) {
1654 if (flags & PERLIO_F_CANWRITE)
1657 else if (flags & PERLIO_F_CANWRITE) {
1659 if (flags & PERLIO_F_CANREAD) {
1663 #if O_TEXT != O_BINARY
1664 if (!(flags & PERLIO_F_CRLF))
1672 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1674 PerlIOl *l = PerlIOBase(f);
1676 const char *omode = mode;
1679 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1680 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1681 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1682 if (tab->Set_ptrcnt != NULL)
1683 l->flags |= PERLIO_F_FASTGETS;
1685 if (*mode == '#' || *mode == 'I')
1689 l->flags |= PERLIO_F_CANREAD;
1692 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1695 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1698 SETERRNO(EINVAL, LIB$_INVARG);
1704 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1707 l->flags &= ~PERLIO_F_CRLF;
1710 l->flags |= PERLIO_F_CRLF;
1713 SETERRNO(EINVAL, LIB$_INVARG);
1720 l->flags |= l->next->flags &
1721 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1726 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1727 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1728 l->flags, PerlIO_modestr(f, temp));
1734 PerlIOBase_popped(PerlIO *f)
1740 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1744 * Save the position as current head considers it
1746 Off_t old = PerlIO_tell(f);
1748 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1749 PerlIOSelf(f, PerlIOBuf)->posn = old;
1750 done = PerlIOBuf_unread(f, vbuf, count);
1755 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1757 STDCHAR *buf = (STDCHAR *) vbuf;
1759 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1762 SSize_t avail = PerlIO_get_cnt(f);
1765 take = (count < avail) ? count : avail;
1767 STDCHAR *ptr = PerlIO_get_ptr(f);
1768 Copy(ptr, buf, take, STDCHAR);
1769 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1773 if (count > 0 && avail <= 0) {
1774 if (PerlIO_fill(f) != 0)
1778 return (buf - (STDCHAR *) vbuf);
1784 PerlIOBase_noop_ok(PerlIO *f)
1790 PerlIOBase_noop_fail(PerlIO *f)
1796 PerlIOBase_close(PerlIO *f)
1799 PerlIO *n = PerlIONext(f);
1800 if (PerlIO_flush(f) != 0)
1802 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1804 PerlIOBase(f)->flags &=
1805 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1810 PerlIOBase_eof(PerlIO *f)
1813 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1819 PerlIOBase_error(PerlIO *f)
1822 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1828 PerlIOBase_clearerr(PerlIO *f)
1831 PerlIO *n = PerlIONext(f);
1832 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1839 PerlIOBase_setlinebuf(PerlIO *f)
1842 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1846 /*--------------------------------------------------------------------------------------*/
1848 * Bottom-most level for UNIX-like case
1852 struct _PerlIO base; /* The generic part */
1853 int fd; /* UNIX like file descriptor */
1854 int oflags; /* open/fcntl flags */
1858 PerlIOUnix_oflags(const char *mode)
1861 if (*mode == 'I' || *mode == '#')
1866 if (*++mode == '+') {
1873 oflags = O_CREAT | O_TRUNC;
1874 if (*++mode == '+') {
1883 oflags = O_CREAT | O_APPEND;
1884 if (*++mode == '+') {
1897 else if (*mode == 't') {
1899 oflags &= ~O_BINARY;
1903 * Always open in binary mode
1906 if (*mode || oflags == -1) {
1907 SETERRNO(EINVAL, LIB$_INVARG);
1914 PerlIOUnix_fileno(PerlIO *f)
1916 return PerlIOSelf(f, PerlIOUnix)->fd;
1920 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
1922 IV code = PerlIOBase_pushed(f, mode, arg);
1923 if (*PerlIONext(f)) {
1924 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1925 s->fd = PerlIO_fileno(PerlIONext(f));
1927 * XXX could (or should) we retrieve the oflags from the open file
1928 * handle rather than believing the "mode" we are passed in? XXX
1929 * Should the value on NULL mode be 0 or -1?
1931 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1933 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1938 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1939 IV n, const char *mode, int fd, int imode,
1940 int perm, PerlIO *f, int narg, SV **args)
1943 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1944 (*PerlIOBase(f)->tab->Close) (f);
1947 char *path = SvPV_nolen(*args);
1951 imode = PerlIOUnix_oflags(mode);
1955 fd = PerlLIO_open3(path, imode, perm);
1963 f = PerlIO_allocate(aTHX);
1964 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1968 s = PerlIOSelf(f, PerlIOUnix);
1971 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1977 * FIXME: pop layers ???
1985 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1991 return sv_dup(arg, param);
1994 return newSVsv(arg);
1997 return newSVsv(arg);
2002 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2004 PerlIO *nexto = PerlIONext(o);
2005 PerlIO_debug("PerlIOBase_dup f=%p o=%p param=%p\n",f,o,param);
2007 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2008 f = (*tab->Dup)(aTHX_ f, nexto, param);
2011 PerlIO_funcs *self = PerlIOBase(o)->tab;
2015 arg = (*self->Getarg)(o);
2017 arg = PerlIO_sv_dup(aTHX_ arg, param);
2020 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2029 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2031 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2032 int fd = PerlLIO_dup(os->fd);
2034 f = PerlIOBase_dup(aTHX_ f, o, param);
2036 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2037 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2050 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2053 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2054 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2057 SSize_t len = PerlLIO_read(fd, vbuf, count);
2058 if (len >= 0 || errno != EINTR) {
2060 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2061 else if (len == 0 && count != 0)
2062 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2070 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2073 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2075 SSize_t len = PerlLIO_write(fd, vbuf, count);
2076 if (len >= 0 || errno != EINTR) {
2078 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2086 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2090 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2091 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2092 return (new == (Off_t) - 1) ? -1 : 0;
2096 PerlIOUnix_tell(PerlIO *f)
2099 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2104 PerlIOUnix_close(PerlIO *f)
2107 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2109 while (PerlLIO_close(fd) != 0) {
2110 if (errno != EINTR) {
2117 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2122 PerlIO_funcs PerlIO_unix = {
2138 PerlIOBase_noop_ok, /* flush */
2139 PerlIOBase_noop_fail, /* fill */
2142 PerlIOBase_clearerr,
2143 PerlIOBase_setlinebuf,
2144 NULL, /* get_base */
2145 NULL, /* get_bufsiz */
2148 NULL, /* set_ptrcnt */
2151 /*--------------------------------------------------------------------------------------*/
2157 struct _PerlIO base;
2158 FILE *stdio; /* The stream */
2162 PerlIOStdio_fileno(PerlIO *f)
2165 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2169 PerlIOStdio_mode(const char *mode, char *tmode)
2175 if (O_BINARY != O_TEXT) {
2183 * This isn't used yet ...
2186 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2188 if (*PerlIONext(f)) {
2190 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2193 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2194 PerlIOStdio_mode(mode, tmode));
2200 return PerlIOBase_pushed(f, mode, arg);
2203 #undef PerlIO_importFILE
2205 PerlIO_importFILE(FILE *stdio, int fl)
2211 PerlIOSelf(PerlIO_push
2212 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2213 "r+", Nullsv), PerlIOStdio);
2220 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2221 IV n, const char *mode, int fd, int imode,
2222 int perm, PerlIO *f, int narg, SV **args)
2226 char *path = SvPV_nolen(*args);
2227 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2229 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2238 char *path = SvPV_nolen(*args);
2241 fd = PerlLIO_open3(path, imode, perm);
2244 FILE *stdio = PerlSIO_fopen(path, mode);
2247 PerlIOSelf(PerlIO_push
2248 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2249 (mode = PerlIOStdio_mode(mode, tmode)),
2267 stdio = PerlSIO_stdin;
2270 stdio = PerlSIO_stdout;
2273 stdio = PerlSIO_stderr;
2278 stdio = PerlSIO_fdopen(fd, mode =
2279 PerlIOStdio_mode(mode, tmode));
2283 PerlIOSelf(PerlIO_push
2284 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2285 mode, PerlIOArg), PerlIOStdio);
2295 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2298 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2301 STDCHAR *buf = (STDCHAR *) vbuf;
2303 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2304 * stdio does not do that for fread()
2306 int ch = PerlSIO_fgetc(s);
2313 got = PerlSIO_fread(vbuf, 1, count, s);
2318 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2321 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2322 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2325 int ch = *buf-- & 0xff;
2326 if (PerlSIO_ungetc(ch, s) != ch)
2335 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2338 return PerlSIO_fwrite(vbuf, 1, count,
2339 PerlIOSelf(f, PerlIOStdio)->stdio);
2343 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2346 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2347 return PerlSIO_fseek(stdio, offset, whence);
2351 PerlIOStdio_tell(PerlIO *f)
2354 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2355 return PerlSIO_ftell(stdio);
2359 PerlIOStdio_close(PerlIO *f)
2362 #ifdef SOCKS5_VERSION_NAME
2364 Sock_size_t optlen = sizeof(int);
2366 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2368 #ifdef SOCKS5_VERSION_NAME
2370 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2372 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2374 PerlSIO_fclose(stdio)
2381 PerlIOStdio_flush(PerlIO *f)
2384 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2385 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2386 return PerlSIO_fflush(stdio);
2391 * FIXME: This discards ungetc() and pre-read stuff which is not
2392 * right if this is just a "sync" from a layer above Suspect right
2393 * design is to do _this_ but not have layer above flush this
2394 * layer read-to-read
2397 * Not writeable - sync by attempting a seek
2400 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2408 PerlIOStdio_fill(PerlIO *f)
2411 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2414 * fflush()ing read-only streams can cause trouble on some stdio-s
2416 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2417 if (PerlSIO_fflush(stdio) != 0)
2420 c = PerlSIO_fgetc(stdio);
2421 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2427 PerlIOStdio_eof(PerlIO *f)
2430 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2434 PerlIOStdio_error(PerlIO *f)
2437 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2441 PerlIOStdio_clearerr(PerlIO *f)
2444 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2448 PerlIOStdio_setlinebuf(PerlIO *f)
2451 #ifdef HAS_SETLINEBUF
2452 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2454 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2460 PerlIOStdio_get_base(PerlIO *f)
2463 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2464 return PerlSIO_get_base(stdio);
2468 PerlIOStdio_get_bufsiz(PerlIO *f)
2471 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2472 return PerlSIO_get_bufsiz(stdio);
2476 #ifdef USE_STDIO_PTR
2478 PerlIOStdio_get_ptr(PerlIO *f)
2481 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2482 return PerlSIO_get_ptr(stdio);
2486 PerlIOStdio_get_cnt(PerlIO *f)
2489 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2490 return PerlSIO_get_cnt(stdio);
2494 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2496 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2499 #ifdef STDIO_PTR_LVALUE
2500 PerlSIO_set_ptr(stdio, ptr);
2501 #ifdef STDIO_PTR_LVAL_SETS_CNT
2502 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2504 assert(PerlSIO_get_cnt(stdio) == (cnt));
2507 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2509 * Setting ptr _does_ change cnt - we are done
2513 #else /* STDIO_PTR_LVALUE */
2515 #endif /* STDIO_PTR_LVALUE */
2518 * Now (or only) set cnt
2520 #ifdef STDIO_CNT_LVALUE
2521 PerlSIO_set_cnt(stdio, cnt);
2522 #else /* STDIO_CNT_LVALUE */
2523 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2524 PerlSIO_set_ptr(stdio,
2525 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2527 #else /* STDIO_PTR_LVAL_SETS_CNT */
2529 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2530 #endif /* STDIO_CNT_LVALUE */
2536 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2538 return PerlIOBase_dup(aTHX_ f, o, param);
2541 PerlIO_funcs PerlIO_stdio = {
2543 sizeof(PerlIOStdio),
2561 PerlIOStdio_clearerr,
2562 PerlIOStdio_setlinebuf,
2564 PerlIOStdio_get_base,
2565 PerlIOStdio_get_bufsiz,
2570 #ifdef USE_STDIO_PTR
2571 PerlIOStdio_get_ptr,
2572 PerlIOStdio_get_cnt,
2573 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2574 PerlIOStdio_set_ptrcnt
2575 #else /* STDIO_PTR_LVALUE */
2577 #endif /* STDIO_PTR_LVALUE */
2578 #else /* USE_STDIO_PTR */
2582 #endif /* USE_STDIO_PTR */
2585 #undef PerlIO_exportFILE
2587 PerlIO_exportFILE(PerlIO *f, int fl)
2591 stdio = fdopen(PerlIO_fileno(f), "r+");
2595 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2602 #undef PerlIO_findFILE
2604 PerlIO_findFILE(PerlIO *f)
2608 if (l->tab == &PerlIO_stdio) {
2609 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2612 l = *PerlIONext(&l);
2614 return PerlIO_exportFILE(f, 0);
2617 #undef PerlIO_releaseFILE
2619 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2623 /*--------------------------------------------------------------------------------------*/
2625 * perlio buffer layer
2629 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2632 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2633 int fd = PerlIO_fileno(f);
2635 if (fd >= 0 && PerlLIO_isatty(fd)) {
2636 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2638 posn = PerlIO_tell(PerlIONext(f));
2639 if (posn != (Off_t) - 1) {
2642 return PerlIOBase_pushed(f, mode, arg);
2646 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2647 IV n, const char *mode, int fd, int imode, int perm,
2648 PerlIO *f, int narg, SV **args)
2651 PerlIO *next = PerlIONext(f);
2653 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2655 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2658 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2664 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2672 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2675 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2676 fd = PerlIO_fileno(f);
2677 #if O_BINARY != O_TEXT
2679 * do something about failing setmode()? --jhi
2681 PerlLIO_setmode(fd, O_BINARY);
2683 if (init && fd == 2) {
2685 * Initial stderr is unbuffered
2687 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2695 * This "flush" is akin to sfio's sync in that it handles files in either
2696 * read or write state
2699 PerlIOBuf_flush(PerlIO *f)
2701 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2703 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2705 * write() the buffer
2707 STDCHAR *buf = b->buf;
2709 PerlIO *n = PerlIONext(f);
2710 while (p < b->ptr) {
2711 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2715 else if (count < 0 || PerlIO_error(n)) {
2716 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2721 b->posn += (p - buf);
2723 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2724 STDCHAR *buf = PerlIO_get_base(f);
2726 * Note position change
2728 b->posn += (b->ptr - buf);
2729 if (b->ptr < b->end) {
2731 * We did not consume all of it
2733 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2734 b->posn = PerlIO_tell(PerlIONext(f));
2738 b->ptr = b->end = b->buf;
2739 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2741 * FIXME: Is this right for read case ?
2743 if (PerlIO_flush(PerlIONext(f)) != 0)
2749 PerlIOBuf_fill(PerlIO *f)
2751 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2752 PerlIO *n = PerlIONext(f);
2755 * FIXME: doing the down-stream flush is a bad idea if it causes
2756 * pre-read data in stdio buffer to be discarded but this is too
2757 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2758 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2760 if (PerlIO_flush(f) != 0)
2762 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2763 PerlIOBase_flush_linebuf();
2766 PerlIO_get_base(f); /* allocate via vtable */
2768 b->ptr = b->end = b->buf;
2769 if (PerlIO_fast_gets(n)) {
2771 * Layer below is also buffered We do _NOT_ want to call its
2772 * ->Read() because that will loop till it gets what we asked for
2773 * which may hang on a pipe etc. Instead take anything it has to
2774 * hand, or ask it to fill _once_.
2776 avail = PerlIO_get_cnt(n);
2778 avail = PerlIO_fill(n);
2780 avail = PerlIO_get_cnt(n);
2782 if (!PerlIO_error(n) && PerlIO_eof(n))
2787 STDCHAR *ptr = PerlIO_get_ptr(n);
2788 SSize_t cnt = avail;
2789 if (avail > b->bufsiz)
2791 Copy(ptr, b->buf, avail, STDCHAR);
2792 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2796 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2800 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2802 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2805 b->end = b->buf + avail;
2806 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2811 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2813 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2817 return PerlIOBase_read(f, vbuf, count);
2823 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2825 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2826 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2829 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2834 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2836 * Buffer is already a read buffer, we can overwrite any chars
2837 * which have been read back to buffer start
2839 avail = (b->ptr - b->buf);
2843 * Buffer is idle, set it up so whole buffer is available for
2847 b->end = b->buf + avail;
2849 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2851 * Buffer extends _back_ from where we are now
2853 b->posn -= b->bufsiz;
2855 if (avail > (SSize_t) count) {
2857 * If we have space for more than count, just move count
2865 * In simple stdio-like ungetc() case chars will be already
2868 if (buf != b->ptr) {
2869 Copy(buf, b->ptr, avail, STDCHAR);
2873 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2880 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2882 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2883 const STDCHAR *buf = (const STDCHAR *) vbuf;
2887 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2890 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2891 if ((SSize_t) count < avail)
2893 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2894 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2909 Copy(buf, b->ptr, avail, STDCHAR);
2916 if (b->ptr >= (b->buf + b->bufsiz))
2919 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2925 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2928 if ((code = PerlIO_flush(f)) == 0) {
2929 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2930 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2931 code = PerlIO_seek(PerlIONext(f), offset, whence);
2933 b->posn = PerlIO_tell(PerlIONext(f));
2940 PerlIOBuf_tell(PerlIO *f)
2942 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2944 * b->posn is file position where b->buf was read, or will be written
2946 Off_t posn = b->posn;
2949 * If buffer is valid adjust position by amount in buffer
2951 posn += (b->ptr - b->buf);
2957 PerlIOBuf_close(PerlIO *f)
2959 IV code = PerlIOBase_close(f);
2960 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2961 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2962 PerlMemShared_free(b->buf);
2965 b->ptr = b->end = b->buf;
2966 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2971 PerlIOBuf_get_ptr(PerlIO *f)
2973 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2980 PerlIOBuf_get_cnt(PerlIO *f)
2982 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2985 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
2986 return (b->end - b->ptr);
2991 PerlIOBuf_get_base(PerlIO *f)
2993 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2997 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
2999 b->buf = (STDCHAR *) & b->oneword;
3000 b->bufsiz = sizeof(b->oneword);
3009 PerlIOBuf_bufsiz(PerlIO *f)
3011 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3014 return (b->end - b->buf);
3018 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3020 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3024 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3026 assert(PerlIO_get_cnt(f) == cnt);
3027 assert(b->ptr >= b->buf);
3029 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3033 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3035 return PerlIOBase_dup(aTHX_ f, o, param);
3040 PerlIO_funcs PerlIO_perlio = {
3060 PerlIOBase_clearerr,
3061 PerlIOBase_setlinebuf,
3066 PerlIOBuf_set_ptrcnt,
3069 /*--------------------------------------------------------------------------------------*/
3071 * Temp layer to hold unread chars when cannot do it any other way
3075 PerlIOPending_fill(PerlIO *f)
3078 * Should never happen
3085 PerlIOPending_close(PerlIO *f)
3088 * A tad tricky - flush pops us, then we close new top
3091 return PerlIO_close(f);
3095 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3098 * A tad tricky - flush pops us, then we seek new top
3101 return PerlIO_seek(f, offset, whence);
3106 PerlIOPending_flush(PerlIO *f)
3109 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3110 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3111 PerlMemShared_free(b->buf);
3114 PerlIO_pop(aTHX_ f);
3119 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3125 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3130 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3132 IV code = PerlIOBase_pushed(f, mode, arg);
3133 PerlIOl *l = PerlIOBase(f);
3135 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3136 * etc. get muddled when it changes mid-string when we auto-pop.
3138 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3139 (PerlIOBase(PerlIONext(f))->
3140 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3145 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3147 SSize_t avail = PerlIO_get_cnt(f);
3152 got = PerlIOBuf_read(f, vbuf, avail);
3153 if (got >= 0 && got < count) {
3155 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3156 if (more >= 0 || got == 0)
3162 PerlIO_funcs PerlIO_pending = {
3166 PerlIOPending_pushed,
3177 PerlIOPending_close,
3178 PerlIOPending_flush,
3182 PerlIOBase_clearerr,
3183 PerlIOBase_setlinebuf,
3188 PerlIOPending_set_ptrcnt,
3193 /*--------------------------------------------------------------------------------------*/
3195 * crlf - translation On read translate CR,LF to "\n" we do this by
3196 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3197 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3201 PerlIOBuf base; /* PerlIOBuf stuff */
3202 STDCHAR *nl; /* Position of crlf we "lied" about in the
3207 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3210 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3211 code = PerlIOBuf_pushed(f, mode, arg);
3213 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3214 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3215 PerlIOBase(f)->flags);
3222 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3224 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3229 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3230 return PerlIOBuf_unread(f, vbuf, count);
3232 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3233 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3235 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3240 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3241 b->end = b->ptr = b->buf + b->bufsiz;
3242 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3243 b->posn -= b->bufsiz;
3245 while (count > 0 && b->ptr > b->buf) {
3248 if (b->ptr - 2 >= b->buf) {
3271 PerlIOCrlf_get_cnt(PerlIO *f)
3273 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3276 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3277 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3278 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3279 STDCHAR *nl = b->ptr;
3281 while (nl < b->end && *nl != 0xd)
3283 if (nl < b->end && *nl == 0xd) {
3285 if (nl + 1 < b->end) {
3292 * Not CR,LF but just CR
3300 * Blast - found CR as last char in buffer
3304 * They may not care, defer work as long as
3307 return (nl - b->ptr);
3311 b->ptr++; /* say we have read it as far as
3312 * flush() is concerned */
3313 b->buf++; /* Leave space an front of buffer */
3314 b->bufsiz--; /* Buffer is thus smaller */
3315 code = PerlIO_fill(f); /* Fetch some more */
3316 b->bufsiz++; /* Restore size for next time */
3317 b->buf--; /* Point at space */
3318 b->ptr = nl = b->buf; /* Which is what we hand
3320 b->posn--; /* Buffer starts here */
3321 *nl = 0xd; /* Fill in the CR */
3323 goto test; /* fill() call worked */
3325 * CR at EOF - just fall through
3331 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3337 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3339 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3340 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3341 IV flags = PerlIOBase(f)->flags;
3349 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3356 * Test code - delete when it works ...
3363 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3370 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3371 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3378 * They have taken what we lied about
3386 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3390 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3392 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3393 return PerlIOBuf_write(f, vbuf, count);
3395 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3396 const STDCHAR *buf = (const STDCHAR *) vbuf;
3397 const STDCHAR *ebuf = buf + count;
3400 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3402 while (buf < ebuf) {
3403 STDCHAR *eptr = b->buf + b->bufsiz;
3404 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3405 while (buf < ebuf && b->ptr < eptr) {
3407 if ((b->ptr + 2) > eptr) {
3415 *(b->ptr)++ = 0xd; /* CR */
3416 *(b->ptr)++ = 0xa; /* LF */
3418 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3428 if (b->ptr >= eptr) {
3434 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3436 return (buf - (STDCHAR *) vbuf);
3441 PerlIOCrlf_flush(PerlIO *f)
3443 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3448 return PerlIOBuf_flush(f);
3451 PerlIO_funcs PerlIO_crlf = {
3454 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3456 PerlIOBase_noop_ok, /* popped */
3461 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3463 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3464 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3472 PerlIOBase_clearerr,
3473 PerlIOBase_setlinebuf,
3478 PerlIOCrlf_set_ptrcnt,
3482 /*--------------------------------------------------------------------------------------*/
3484 * mmap as "buffer" layer
3488 PerlIOBuf base; /* PerlIOBuf stuff */
3489 Mmap_t mptr; /* Mapped address */
3490 Size_t len; /* mapped length */
3491 STDCHAR *bbuf; /* malloced buffer if map fails */
3494 static size_t page_size = 0;
3497 PerlIOMmap_map(PerlIO *f)
3500 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3501 IV flags = PerlIOBase(f)->flags;
3505 if (flags & PERLIO_F_CANREAD) {
3506 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3507 int fd = PerlIO_fileno(f);
3509 code = fstat(fd, &st);
3510 if (code == 0 && S_ISREG(st.st_mode)) {
3511 SSize_t len = st.st_size - b->posn;
3515 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3517 SETERRNO(0, SS$_NORMAL);
3518 # ifdef _SC_PAGESIZE
3519 page_size = sysconf(_SC_PAGESIZE);
3521 page_size = sysconf(_SC_PAGE_SIZE);
3523 if ((long) page_size < 0) {
3528 (void) SvUPGRADE(error, SVt_PV);
3529 msg = SvPVx(error, n_a);
3530 Perl_croak(aTHX_ "panic: sysconf: %s",
3535 "panic: sysconf: pagesize unknown");
3539 # ifdef HAS_GETPAGESIZE
3540 page_size = getpagesize();
3542 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3543 page_size = PAGESIZE; /* compiletime, bad */
3547 if ((IV) page_size <= 0)
3548 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3553 * This is a hack - should never happen - open should
3556 b->posn = PerlIO_tell(PerlIONext(f));
3558 posn = (b->posn / page_size) * page_size;
3559 len = st.st_size - posn;
3560 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3561 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3562 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3563 madvise(m->mptr, len, MADV_SEQUENTIAL);
3565 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3566 madvise(m->mptr, len, MADV_WILLNEED);
3568 PerlIOBase(f)->flags =
3569 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3570 b->end = ((STDCHAR *) m->mptr) + len;
3571 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3580 PerlIOBase(f)->flags =
3581 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3583 b->ptr = b->end = b->ptr;
3592 PerlIOMmap_unmap(PerlIO *f)
3594 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3595 PerlIOBuf *b = &m->base;
3599 code = munmap(m->mptr, m->len);
3603 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3606 b->ptr = b->end = b->buf;
3607 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3613 PerlIOMmap_get_base(PerlIO *f)
3615 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3616 PerlIOBuf *b = &m->base;
3617 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3619 * Already have a readbuffer in progress
3625 * We have a write buffer or flushed PerlIOBuf read buffer
3627 m->bbuf = b->buf; /* save it in case we need it again */
3628 b->buf = NULL; /* Clear to trigger below */
3631 PerlIOMmap_map(f); /* Try and map it */
3634 * Map did not work - recover PerlIOBuf buffer if we have one
3639 b->ptr = b->end = b->buf;
3642 return PerlIOBuf_get_base(f);
3646 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3648 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3649 PerlIOBuf *b = &m->base;
3650 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3652 if (b->ptr && (b->ptr - count) >= b->buf
3653 && memEQ(b->ptr - count, vbuf, count)) {
3655 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3660 * Loose the unwritable mapped buffer
3664 * If flush took the "buffer" see if we have one from before
3666 if (!b->buf && m->bbuf)
3669 PerlIOBuf_get_base(f);
3673 return PerlIOBuf_unread(f, vbuf, count);
3677 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3679 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3680 PerlIOBuf *b = &m->base;
3681 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3683 * No, or wrong sort of, buffer
3686 if (PerlIOMmap_unmap(f) != 0)
3690 * If unmap took the "buffer" see if we have one from before
3692 if (!b->buf && m->bbuf)
3695 PerlIOBuf_get_base(f);
3699 return PerlIOBuf_write(f, vbuf, count);
3703 PerlIOMmap_flush(PerlIO *f)
3705 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3706 PerlIOBuf *b = &m->base;
3707 IV code = PerlIOBuf_flush(f);
3709 * Now we are "synced" at PerlIOBuf level
3716 if (PerlIOMmap_unmap(f) != 0)
3721 * We seem to have a PerlIOBuf buffer which was not mapped
3722 * remember it in case we need one later
3731 PerlIOMmap_fill(PerlIO *f)
3733 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3734 IV code = PerlIO_flush(f);
3735 if (code == 0 && !b->buf) {
3736 code = PerlIOMmap_map(f);
3738 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3739 code = PerlIOBuf_fill(f);
3745 PerlIOMmap_close(PerlIO *f)
3747 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3748 PerlIOBuf *b = &m->base;
3749 IV code = PerlIO_flush(f);
3753 b->ptr = b->end = b->buf;
3755 if (PerlIOBuf_close(f) != 0)
3761 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3763 return PerlIOBase_dup(aTHX_ f, o, param);
3767 PerlIO_funcs PerlIO_mmap = {
3787 PerlIOBase_clearerr,
3788 PerlIOBase_setlinebuf,
3789 PerlIOMmap_get_base,
3793 PerlIOBuf_set_ptrcnt,
3796 #endif /* HAS_MMAP */
3803 call_atexit(PerlIO_cleanup_layers, NULL);
3807 atexit(&PerlIO_cleanup);
3818 PerlIO_stdstreams(aTHX);
3823 #undef PerlIO_stdout
3829 PerlIO_stdstreams(aTHX);
3834 #undef PerlIO_stderr
3840 PerlIO_stdstreams(aTHX);
3845 /*--------------------------------------------------------------------------------------*/
3847 #undef PerlIO_getname
3849 PerlIO_getname(PerlIO *f, char *buf)
3854 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3856 name = fgetname(stdio, buf);
3858 Perl_croak(aTHX_ "Don't know how to get file name");
3864 /*--------------------------------------------------------------------------------------*/
3866 * Functions which can be called on any kind of PerlIO implemented in
3872 PerlIO_getc(PerlIO *f)
3875 SSize_t count = PerlIO_read(f, buf, 1);
3877 return (unsigned char) buf[0];
3882 #undef PerlIO_ungetc
3884 PerlIO_ungetc(PerlIO *f, int ch)
3888 if (PerlIO_unread(f, &buf, 1) == 1)
3896 PerlIO_putc(PerlIO *f, int ch)
3899 return PerlIO_write(f, &buf, 1);
3904 PerlIO_puts(PerlIO *f, const char *s)
3906 STRLEN len = strlen(s);
3907 return PerlIO_write(f, s, len);
3910 #undef PerlIO_rewind
3912 PerlIO_rewind(PerlIO *f)
3914 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3918 #undef PerlIO_vprintf
3920 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3923 SV *sv = newSVpvn("", 0);
3929 Perl_va_copy(ap, apc);
3930 sv_vcatpvf(sv, fmt, &apc);
3932 sv_vcatpvf(sv, fmt, &ap);
3935 wrote = PerlIO_write(f, s, len);
3940 #undef PerlIO_printf
3942 PerlIO_printf(PerlIO *f, const char *fmt, ...)
3947 result = PerlIO_vprintf(f, fmt, ap);
3952 #undef PerlIO_stdoutf
3954 PerlIO_stdoutf(const char *fmt, ...)
3959 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3964 #undef PerlIO_tmpfile
3966 PerlIO_tmpfile(void)
3969 * I have no idea how portable mkstemp() is ...
3971 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
3974 FILE *stdio = PerlSIO_tmpfile();
3977 PerlIOSelf(PerlIO_push
3978 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3979 "w+", Nullsv), PerlIOStdio);
3985 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
3986 int fd = mkstemp(SvPVX(sv));
3989 f = PerlIO_fdopen(fd, "w+");
3991 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
3993 PerlLIO_unlink(SvPVX(sv));
4003 #endif /* USE_SFIO */
4004 #endif /* PERLIO_IS_STDIO */
4006 /*======================================================================================*/
4008 * Now some functions in terms of above which may be needed even if we are
4009 * not in true PerlIO mode
4013 #undef PerlIO_setpos
4015 PerlIO_setpos(PerlIO *f, SV *pos)
4020 Off_t *posn = (Off_t *) SvPV(pos, len);
4021 if (f && len == sizeof(Off_t))
4022 return PerlIO_seek(f, *posn, SEEK_SET);
4024 SETERRNO(EINVAL, SS$_IVCHAN);
4028 #undef PerlIO_setpos
4030 PerlIO_setpos(PerlIO *f, SV *pos)
4035 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4036 if (f && len == sizeof(Fpos_t)) {
4037 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4038 return fsetpos64(f, fpos);
4040 return fsetpos(f, fpos);
4044 SETERRNO(EINVAL, SS$_IVCHAN);
4050 #undef PerlIO_getpos
4052 PerlIO_getpos(PerlIO *f, SV *pos)
4055 Off_t posn = PerlIO_tell(f);
4056 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4057 return (posn == (Off_t) - 1) ? -1 : 0;
4060 #undef PerlIO_getpos
4062 PerlIO_getpos(PerlIO *f, SV *pos)
4067 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4068 code = fgetpos64(f, &fpos);
4070 code = fgetpos(f, &fpos);
4072 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4077 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4080 vprintf(char *pat, char *args)
4082 _doprnt(pat, args, stdout);
4083 return 0; /* wrong, but perl doesn't use the return
4088 vfprintf(FILE *fd, char *pat, char *args)
4090 _doprnt(pat, args, fd);
4091 return 0; /* wrong, but perl doesn't use the return
4097 #ifndef PerlIO_vsprintf
4099 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4101 int val = vsprintf(s, fmt, ap);
4103 if (strlen(s) >= (STRLEN) n) {
4105 (void) PerlIO_puts(Perl_error_log,
4106 "panic: sprintf overflow - memory corrupted!\n");
4114 #ifndef PerlIO_sprintf
4116 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4121 result = PerlIO_vsprintf(s, n, fmt, ap);