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 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, clone_params *param)
1990 PerlIO_funcs *self = PerlIOBase(o)->tab;
1994 arg = (*self->Getarg)(o);
1997 arg = sv_dup(arg, param);
2002 f = PerlIO_allocate(aTHX);
2004 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2009 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, clone_params *param)
2011 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2012 int fd = PerlLIO_dup(os->fd);
2014 f = PerlIOBase_dup(aTHX_ f, o, param);
2016 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2017 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2030 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2033 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2034 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2037 SSize_t len = PerlLIO_read(fd, vbuf, count);
2038 if (len >= 0 || errno != EINTR) {
2040 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2041 else if (len == 0 && count != 0)
2042 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2050 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2053 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2055 SSize_t len = PerlLIO_write(fd, vbuf, count);
2056 if (len >= 0 || errno != EINTR) {
2058 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2066 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2070 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2071 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2072 return (new == (Off_t) - 1) ? -1 : 0;
2076 PerlIOUnix_tell(PerlIO *f)
2079 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2084 PerlIOUnix_close(PerlIO *f)
2087 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2089 while (PerlLIO_close(fd) != 0) {
2090 if (errno != EINTR) {
2097 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2102 PerlIO_funcs PerlIO_unix = {
2118 PerlIOBase_noop_ok, /* flush */
2119 PerlIOBase_noop_fail, /* fill */
2122 PerlIOBase_clearerr,
2123 PerlIOBase_setlinebuf,
2124 NULL, /* get_base */
2125 NULL, /* get_bufsiz */
2128 NULL, /* set_ptrcnt */
2131 /*--------------------------------------------------------------------------------------*/
2137 struct _PerlIO base;
2138 FILE *stdio; /* The stream */
2142 PerlIOStdio_fileno(PerlIO *f)
2145 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2149 PerlIOStdio_mode(const char *mode, char *tmode)
2155 if (O_BINARY != O_TEXT) {
2163 * This isn't used yet ...
2166 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2168 if (*PerlIONext(f)) {
2170 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2173 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2174 PerlIOStdio_mode(mode, tmode));
2180 return PerlIOBase_pushed(f, mode, arg);
2183 #undef PerlIO_importFILE
2185 PerlIO_importFILE(FILE *stdio, int fl)
2191 PerlIOSelf(PerlIO_push
2192 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2193 "r+", Nullsv), PerlIOStdio);
2200 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2201 IV n, const char *mode, int fd, int imode,
2202 int perm, PerlIO *f, int narg, SV **args)
2206 char *path = SvPV_nolen(*args);
2207 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2209 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2218 char *path = SvPV_nolen(*args);
2221 fd = PerlLIO_open3(path, imode, perm);
2224 FILE *stdio = PerlSIO_fopen(path, mode);
2227 PerlIOSelf(PerlIO_push
2228 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2229 (mode = PerlIOStdio_mode(mode, tmode)),
2247 stdio = PerlSIO_stdin;
2250 stdio = PerlSIO_stdout;
2253 stdio = PerlSIO_stderr;
2258 stdio = PerlSIO_fdopen(fd, mode =
2259 PerlIOStdio_mode(mode, tmode));
2263 PerlIOSelf(PerlIO_push
2264 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2265 mode, PerlIOArg), PerlIOStdio);
2275 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2278 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2281 STDCHAR *buf = (STDCHAR *) vbuf;
2283 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2284 * stdio does not do that for fread()
2286 int ch = PerlSIO_fgetc(s);
2293 got = PerlSIO_fread(vbuf, 1, count, s);
2298 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2301 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2302 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2305 int ch = *buf-- & 0xff;
2306 if (PerlSIO_ungetc(ch, s) != ch)
2315 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2318 return PerlSIO_fwrite(vbuf, 1, count,
2319 PerlIOSelf(f, PerlIOStdio)->stdio);
2323 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2326 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2327 return PerlSIO_fseek(stdio, offset, whence);
2331 PerlIOStdio_tell(PerlIO *f)
2334 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2335 return PerlSIO_ftell(stdio);
2339 PerlIOStdio_close(PerlIO *f)
2342 #ifdef SOCKS5_VERSION_NAME
2344 Sock_size_t optlen = sizeof(int);
2346 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2348 #ifdef SOCKS5_VERSION_NAME
2350 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2352 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2354 PerlSIO_fclose(stdio)
2361 PerlIOStdio_flush(PerlIO *f)
2364 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2365 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2366 return PerlSIO_fflush(stdio);
2371 * FIXME: This discards ungetc() and pre-read stuff which is not
2372 * right if this is just a "sync" from a layer above Suspect right
2373 * design is to do _this_ but not have layer above flush this
2374 * layer read-to-read
2377 * Not writeable - sync by attempting a seek
2380 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2388 PerlIOStdio_fill(PerlIO *f)
2391 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2394 * fflush()ing read-only streams can cause trouble on some stdio-s
2396 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2397 if (PerlSIO_fflush(stdio) != 0)
2400 c = PerlSIO_fgetc(stdio);
2401 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2407 PerlIOStdio_eof(PerlIO *f)
2410 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2414 PerlIOStdio_error(PerlIO *f)
2417 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2421 PerlIOStdio_clearerr(PerlIO *f)
2424 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2428 PerlIOStdio_setlinebuf(PerlIO *f)
2431 #ifdef HAS_SETLINEBUF
2432 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2434 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2440 PerlIOStdio_get_base(PerlIO *f)
2443 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2444 return PerlSIO_get_base(stdio);
2448 PerlIOStdio_get_bufsiz(PerlIO *f)
2451 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2452 return PerlSIO_get_bufsiz(stdio);
2456 #ifdef USE_STDIO_PTR
2458 PerlIOStdio_get_ptr(PerlIO *f)
2461 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2462 return PerlSIO_get_ptr(stdio);
2466 PerlIOStdio_get_cnt(PerlIO *f)
2469 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2470 return PerlSIO_get_cnt(stdio);
2474 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2476 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2479 #ifdef STDIO_PTR_LVALUE
2480 PerlSIO_set_ptr(stdio, ptr);
2481 #ifdef STDIO_PTR_LVAL_SETS_CNT
2482 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2484 assert(PerlSIO_get_cnt(stdio) == (cnt));
2487 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2489 * Setting ptr _does_ change cnt - we are done
2493 #else /* STDIO_PTR_LVALUE */
2495 #endif /* STDIO_PTR_LVALUE */
2498 * Now (or only) set cnt
2500 #ifdef STDIO_CNT_LVALUE
2501 PerlSIO_set_cnt(stdio, cnt);
2502 #else /* STDIO_CNT_LVALUE */
2503 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2504 PerlSIO_set_ptr(stdio,
2505 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2507 #else /* STDIO_PTR_LVAL_SETS_CNT */
2509 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2510 #endif /* STDIO_CNT_LVALUE */
2516 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, clone_params *param)
2521 PerlIO_funcs PerlIO_stdio = {
2523 sizeof(PerlIOStdio),
2541 PerlIOStdio_clearerr,
2542 PerlIOStdio_setlinebuf,
2544 PerlIOStdio_get_base,
2545 PerlIOStdio_get_bufsiz,
2550 #ifdef USE_STDIO_PTR
2551 PerlIOStdio_get_ptr,
2552 PerlIOStdio_get_cnt,
2553 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2554 PerlIOStdio_set_ptrcnt
2555 #else /* STDIO_PTR_LVALUE */
2557 #endif /* STDIO_PTR_LVALUE */
2558 #else /* USE_STDIO_PTR */
2562 #endif /* USE_STDIO_PTR */
2565 #undef PerlIO_exportFILE
2567 PerlIO_exportFILE(PerlIO *f, int fl)
2571 stdio = fdopen(PerlIO_fileno(f), "r+");
2575 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2582 #undef PerlIO_findFILE
2584 PerlIO_findFILE(PerlIO *f)
2588 if (l->tab == &PerlIO_stdio) {
2589 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2592 l = *PerlIONext(&l);
2594 return PerlIO_exportFILE(f, 0);
2597 #undef PerlIO_releaseFILE
2599 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2603 /*--------------------------------------------------------------------------------------*/
2605 * perlio buffer layer
2609 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2612 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2613 int fd = PerlIO_fileno(f);
2615 if (fd >= 0 && PerlLIO_isatty(fd)) {
2616 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2618 posn = PerlIO_tell(PerlIONext(f));
2619 if (posn != (Off_t) - 1) {
2622 return PerlIOBase_pushed(f, mode, arg);
2626 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2627 IV n, const char *mode, int fd, int imode, int perm,
2628 PerlIO *f, int narg, SV **args)
2631 PerlIO *next = PerlIONext(f);
2633 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2635 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2638 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2644 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2652 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2655 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2656 fd = PerlIO_fileno(f);
2657 #if O_BINARY != O_TEXT
2659 * do something about failing setmode()? --jhi
2661 PerlLIO_setmode(fd, O_BINARY);
2663 if (init && fd == 2) {
2665 * Initial stderr is unbuffered
2667 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2675 * This "flush" is akin to sfio's sync in that it handles files in either
2676 * read or write state
2679 PerlIOBuf_flush(PerlIO *f)
2681 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2683 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2685 * write() the buffer
2687 STDCHAR *buf = b->buf;
2689 PerlIO *n = PerlIONext(f);
2690 while (p < b->ptr) {
2691 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2695 else if (count < 0 || PerlIO_error(n)) {
2696 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2701 b->posn += (p - buf);
2703 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2704 STDCHAR *buf = PerlIO_get_base(f);
2706 * Note position change
2708 b->posn += (b->ptr - buf);
2709 if (b->ptr < b->end) {
2711 * We did not consume all of it
2713 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2714 b->posn = PerlIO_tell(PerlIONext(f));
2718 b->ptr = b->end = b->buf;
2719 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2721 * FIXME: Is this right for read case ?
2723 if (PerlIO_flush(PerlIONext(f)) != 0)
2729 PerlIOBuf_fill(PerlIO *f)
2731 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2732 PerlIO *n = PerlIONext(f);
2735 * FIXME: doing the down-stream flush is a bad idea if it causes
2736 * pre-read data in stdio buffer to be discarded but this is too
2737 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2738 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2740 if (PerlIO_flush(f) != 0)
2742 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2743 PerlIOBase_flush_linebuf();
2746 PerlIO_get_base(f); /* allocate via vtable */
2748 b->ptr = b->end = b->buf;
2749 if (PerlIO_fast_gets(n)) {
2751 * Layer below is also buffered We do _NOT_ want to call its
2752 * ->Read() because that will loop till it gets what we asked for
2753 * which may hang on a pipe etc. Instead take anything it has to
2754 * hand, or ask it to fill _once_.
2756 avail = PerlIO_get_cnt(n);
2758 avail = PerlIO_fill(n);
2760 avail = PerlIO_get_cnt(n);
2762 if (!PerlIO_error(n) && PerlIO_eof(n))
2767 STDCHAR *ptr = PerlIO_get_ptr(n);
2768 SSize_t cnt = avail;
2769 if (avail > b->bufsiz)
2771 Copy(ptr, b->buf, avail, STDCHAR);
2772 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2776 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2780 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2782 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2785 b->end = b->buf + avail;
2786 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2791 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2793 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2797 return PerlIOBase_read(f, vbuf, count);
2803 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2805 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2806 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2809 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2814 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2816 * Buffer is already a read buffer, we can overwrite any chars
2817 * which have been read back to buffer start
2819 avail = (b->ptr - b->buf);
2823 * Buffer is idle, set it up so whole buffer is available for
2827 b->end = b->buf + avail;
2829 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2831 * Buffer extends _back_ from where we are now
2833 b->posn -= b->bufsiz;
2835 if (avail > (SSize_t) count) {
2837 * If we have space for more than count, just move count
2845 * In simple stdio-like ungetc() case chars will be already
2848 if (buf != b->ptr) {
2849 Copy(buf, b->ptr, avail, STDCHAR);
2853 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2860 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2862 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2863 const STDCHAR *buf = (const STDCHAR *) vbuf;
2867 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2870 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2871 if ((SSize_t) count < avail)
2873 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2874 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2889 Copy(buf, b->ptr, avail, STDCHAR);
2896 if (b->ptr >= (b->buf + b->bufsiz))
2899 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2905 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2908 if ((code = PerlIO_flush(f)) == 0) {
2909 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2910 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2911 code = PerlIO_seek(PerlIONext(f), offset, whence);
2913 b->posn = PerlIO_tell(PerlIONext(f));
2920 PerlIOBuf_tell(PerlIO *f)
2922 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2924 * b->posn is file position where b->buf was read, or will be written
2926 Off_t posn = b->posn;
2929 * If buffer is valid adjust position by amount in buffer
2931 posn += (b->ptr - b->buf);
2937 PerlIOBuf_close(PerlIO *f)
2939 IV code = PerlIOBase_close(f);
2940 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2941 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2942 PerlMemShared_free(b->buf);
2945 b->ptr = b->end = b->buf;
2946 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2951 PerlIOBuf_get_ptr(PerlIO *f)
2953 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2960 PerlIOBuf_get_cnt(PerlIO *f)
2962 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2965 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
2966 return (b->end - b->ptr);
2971 PerlIOBuf_get_base(PerlIO *f)
2973 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2977 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
2979 b->buf = (STDCHAR *) & b->oneword;
2980 b->bufsiz = sizeof(b->oneword);
2989 PerlIOBuf_bufsiz(PerlIO *f)
2991 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2994 return (b->end - b->buf);
2998 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3000 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3004 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3006 assert(PerlIO_get_cnt(f) == cnt);
3007 assert(b->ptr >= b->buf);
3009 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3013 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, clone_params *param)
3020 PerlIO_funcs PerlIO_perlio = {
3040 PerlIOBase_clearerr,
3041 PerlIOBase_setlinebuf,
3046 PerlIOBuf_set_ptrcnt,
3049 /*--------------------------------------------------------------------------------------*/
3051 * Temp layer to hold unread chars when cannot do it any other way
3055 PerlIOPending_fill(PerlIO *f)
3058 * Should never happen
3065 PerlIOPending_close(PerlIO *f)
3068 * A tad tricky - flush pops us, then we close new top
3071 return PerlIO_close(f);
3075 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3078 * A tad tricky - flush pops us, then we seek new top
3081 return PerlIO_seek(f, offset, whence);
3086 PerlIOPending_flush(PerlIO *f)
3089 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3090 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3091 PerlMemShared_free(b->buf);
3094 PerlIO_pop(aTHX_ f);
3099 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3105 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3110 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3112 IV code = PerlIOBase_pushed(f, mode, arg);
3113 PerlIOl *l = PerlIOBase(f);
3115 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3116 * etc. get muddled when it changes mid-string when we auto-pop.
3118 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3119 (PerlIOBase(PerlIONext(f))->
3120 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3125 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3127 SSize_t avail = PerlIO_get_cnt(f);
3132 got = PerlIOBuf_read(f, vbuf, avail);
3133 if (got >= 0 && got < count) {
3135 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3136 if (more >= 0 || got == 0)
3142 PerlIO_funcs PerlIO_pending = {
3146 PerlIOPending_pushed,
3157 PerlIOPending_close,
3158 PerlIOPending_flush,
3162 PerlIOBase_clearerr,
3163 PerlIOBase_setlinebuf,
3168 PerlIOPending_set_ptrcnt,
3173 /*--------------------------------------------------------------------------------------*/
3175 * crlf - translation On read translate CR,LF to "\n" we do this by
3176 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3177 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3181 PerlIOBuf base; /* PerlIOBuf stuff */
3182 STDCHAR *nl; /* Position of crlf we "lied" about in the
3187 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3190 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3191 code = PerlIOBuf_pushed(f, mode, arg);
3193 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3194 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3195 PerlIOBase(f)->flags);
3202 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3204 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3209 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3210 return PerlIOBuf_unread(f, vbuf, count);
3212 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3213 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3215 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3220 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3221 b->end = b->ptr = b->buf + b->bufsiz;
3222 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3223 b->posn -= b->bufsiz;
3225 while (count > 0 && b->ptr > b->buf) {
3228 if (b->ptr - 2 >= b->buf) {
3251 PerlIOCrlf_get_cnt(PerlIO *f)
3253 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3256 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3257 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3258 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3259 STDCHAR *nl = b->ptr;
3261 while (nl < b->end && *nl != 0xd)
3263 if (nl < b->end && *nl == 0xd) {
3265 if (nl + 1 < b->end) {
3272 * Not CR,LF but just CR
3280 * Blast - found CR as last char in buffer
3284 * They may not care, defer work as long as
3287 return (nl - b->ptr);
3291 b->ptr++; /* say we have read it as far as
3292 * flush() is concerned */
3293 b->buf++; /* Leave space an front of buffer */
3294 b->bufsiz--; /* Buffer is thus smaller */
3295 code = PerlIO_fill(f); /* Fetch some more */
3296 b->bufsiz++; /* Restore size for next time */
3297 b->buf--; /* Point at space */
3298 b->ptr = nl = b->buf; /* Which is what we hand
3300 b->posn--; /* Buffer starts here */
3301 *nl = 0xd; /* Fill in the CR */
3303 goto test; /* fill() call worked */
3305 * CR at EOF - just fall through
3311 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3317 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3319 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3320 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3321 IV flags = PerlIOBase(f)->flags;
3329 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3336 * Test code - delete when it works ...
3343 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3350 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3351 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3358 * They have taken what we lied about
3366 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3370 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3372 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3373 return PerlIOBuf_write(f, vbuf, count);
3375 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3376 const STDCHAR *buf = (const STDCHAR *) vbuf;
3377 const STDCHAR *ebuf = buf + count;
3380 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3382 while (buf < ebuf) {
3383 STDCHAR *eptr = b->buf + b->bufsiz;
3384 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3385 while (buf < ebuf && b->ptr < eptr) {
3387 if ((b->ptr + 2) > eptr) {
3395 *(b->ptr)++ = 0xd; /* CR */
3396 *(b->ptr)++ = 0xa; /* LF */
3398 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3408 if (b->ptr >= eptr) {
3414 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3416 return (buf - (STDCHAR *) vbuf);
3421 PerlIOCrlf_flush(PerlIO *f)
3423 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3428 return PerlIOBuf_flush(f);
3431 PerlIO_funcs PerlIO_crlf = {
3434 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3436 PerlIOBase_noop_ok, /* popped */
3441 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3443 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3444 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3452 PerlIOBase_clearerr,
3453 PerlIOBase_setlinebuf,
3458 PerlIOCrlf_set_ptrcnt,
3462 /*--------------------------------------------------------------------------------------*/
3464 * mmap as "buffer" layer
3468 PerlIOBuf base; /* PerlIOBuf stuff */
3469 Mmap_t mptr; /* Mapped address */
3470 Size_t len; /* mapped length */
3471 STDCHAR *bbuf; /* malloced buffer if map fails */
3474 static size_t page_size = 0;
3477 PerlIOMmap_map(PerlIO *f)
3480 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3481 IV flags = PerlIOBase(f)->flags;
3485 if (flags & PERLIO_F_CANREAD) {
3486 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3487 int fd = PerlIO_fileno(f);
3489 code = fstat(fd, &st);
3490 if (code == 0 && S_ISREG(st.st_mode)) {
3491 SSize_t len = st.st_size - b->posn;
3495 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3497 SETERRNO(0, SS$_NORMAL);
3498 # ifdef _SC_PAGESIZE
3499 page_size = sysconf(_SC_PAGESIZE);
3501 page_size = sysconf(_SC_PAGE_SIZE);
3503 if ((long) page_size < 0) {
3508 (void) SvUPGRADE(error, SVt_PV);
3509 msg = SvPVx(error, n_a);
3510 Perl_croak(aTHX_ "panic: sysconf: %s",
3515 "panic: sysconf: pagesize unknown");
3519 # ifdef HAS_GETPAGESIZE
3520 page_size = getpagesize();
3522 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3523 page_size = PAGESIZE; /* compiletime, bad */
3527 if ((IV) page_size <= 0)
3528 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3533 * This is a hack - should never happen - open should
3536 b->posn = PerlIO_tell(PerlIONext(f));
3538 posn = (b->posn / page_size) * page_size;
3539 len = st.st_size - posn;
3540 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3541 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3542 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3543 madvise(m->mptr, len, MADV_SEQUENTIAL);
3545 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3546 madvise(m->mptr, len, MADV_WILLNEED);
3548 PerlIOBase(f)->flags =
3549 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3550 b->end = ((STDCHAR *) m->mptr) + len;
3551 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3560 PerlIOBase(f)->flags =
3561 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3563 b->ptr = b->end = b->ptr;
3572 PerlIOMmap_unmap(PerlIO *f)
3574 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3575 PerlIOBuf *b = &m->base;
3579 code = munmap(m->mptr, m->len);
3583 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3586 b->ptr = b->end = b->buf;
3587 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3593 PerlIOMmap_get_base(PerlIO *f)
3595 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3596 PerlIOBuf *b = &m->base;
3597 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3599 * Already have a readbuffer in progress
3605 * We have a write buffer or flushed PerlIOBuf read buffer
3607 m->bbuf = b->buf; /* save it in case we need it again */
3608 b->buf = NULL; /* Clear to trigger below */
3611 PerlIOMmap_map(f); /* Try and map it */
3614 * Map did not work - recover PerlIOBuf buffer if we have one
3619 b->ptr = b->end = b->buf;
3622 return PerlIOBuf_get_base(f);
3626 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3628 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3629 PerlIOBuf *b = &m->base;
3630 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3632 if (b->ptr && (b->ptr - count) >= b->buf
3633 && memEQ(b->ptr - count, vbuf, count)) {
3635 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3640 * Loose the unwritable mapped buffer
3644 * If flush took the "buffer" see if we have one from before
3646 if (!b->buf && m->bbuf)
3649 PerlIOBuf_get_base(f);
3653 return PerlIOBuf_unread(f, vbuf, count);
3657 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3659 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3660 PerlIOBuf *b = &m->base;
3661 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3663 * No, or wrong sort of, buffer
3666 if (PerlIOMmap_unmap(f) != 0)
3670 * If unmap took the "buffer" see if we have one from before
3672 if (!b->buf && m->bbuf)
3675 PerlIOBuf_get_base(f);
3679 return PerlIOBuf_write(f, vbuf, count);
3683 PerlIOMmap_flush(PerlIO *f)
3685 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3686 PerlIOBuf *b = &m->base;
3687 IV code = PerlIOBuf_flush(f);
3689 * Now we are "synced" at PerlIOBuf level
3696 if (PerlIOMmap_unmap(f) != 0)
3701 * We seem to have a PerlIOBuf buffer which was not mapped
3702 * remember it in case we need one later
3711 PerlIOMmap_fill(PerlIO *f)
3713 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3714 IV code = PerlIO_flush(f);
3715 if (code == 0 && !b->buf) {
3716 code = PerlIOMmap_map(f);
3718 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3719 code = PerlIOBuf_fill(f);
3725 PerlIOMmap_close(PerlIO *f)
3727 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3728 PerlIOBuf *b = &m->base;
3729 IV code = PerlIO_flush(f);
3733 b->ptr = b->end = b->buf;
3735 if (PerlIOBuf_close(f) != 0)
3741 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, clone_params *param)
3747 PerlIO_funcs PerlIO_mmap = {
3767 PerlIOBase_clearerr,
3768 PerlIOBase_setlinebuf,
3769 PerlIOMmap_get_base,
3773 PerlIOBuf_set_ptrcnt,
3776 #endif /* HAS_MMAP */
3783 call_atexit(PerlIO_cleanup_layers, NULL);
3787 atexit(&PerlIO_cleanup);
3798 PerlIO_stdstreams(aTHX);
3803 #undef PerlIO_stdout
3809 PerlIO_stdstreams(aTHX);
3814 #undef PerlIO_stderr
3820 PerlIO_stdstreams(aTHX);
3825 /*--------------------------------------------------------------------------------------*/
3827 #undef PerlIO_getname
3829 PerlIO_getname(PerlIO *f, char *buf)
3834 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3836 name = fgetname(stdio, buf);
3838 Perl_croak(aTHX_ "Don't know how to get file name");
3844 /*--------------------------------------------------------------------------------------*/
3846 * Functions which can be called on any kind of PerlIO implemented in
3852 PerlIO_getc(PerlIO *f)
3855 SSize_t count = PerlIO_read(f, buf, 1);
3857 return (unsigned char) buf[0];
3862 #undef PerlIO_ungetc
3864 PerlIO_ungetc(PerlIO *f, int ch)
3868 if (PerlIO_unread(f, &buf, 1) == 1)
3876 PerlIO_putc(PerlIO *f, int ch)
3879 return PerlIO_write(f, &buf, 1);
3884 PerlIO_puts(PerlIO *f, const char *s)
3886 STRLEN len = strlen(s);
3887 return PerlIO_write(f, s, len);
3890 #undef PerlIO_rewind
3892 PerlIO_rewind(PerlIO *f)
3894 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3898 #undef PerlIO_vprintf
3900 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3903 SV *sv = newSVpvn("", 0);
3909 Perl_va_copy(ap, apc);
3910 sv_vcatpvf(sv, fmt, &apc);
3912 sv_vcatpvf(sv, fmt, &ap);
3915 wrote = PerlIO_write(f, s, len);
3920 #undef PerlIO_printf
3922 PerlIO_printf(PerlIO *f, const char *fmt, ...)
3927 result = PerlIO_vprintf(f, fmt, ap);
3932 #undef PerlIO_stdoutf
3934 PerlIO_stdoutf(const char *fmt, ...)
3939 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3944 #undef PerlIO_tmpfile
3946 PerlIO_tmpfile(void)
3949 * I have no idea how portable mkstemp() is ...
3951 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
3954 FILE *stdio = PerlSIO_tmpfile();
3957 PerlIOSelf(PerlIO_push
3958 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3959 "w+", Nullsv), PerlIOStdio);
3965 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
3966 int fd = mkstemp(SvPVX(sv));
3969 f = PerlIO_fdopen(fd, "w+");
3971 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
3973 PerlLIO_unlink(SvPVX(sv));
3983 #endif /* USE_SFIO */
3984 #endif /* PERLIO_IS_STDIO */
3986 /*======================================================================================*/
3988 * Now some functions in terms of above which may be needed even if we are
3989 * not in true PerlIO mode
3993 #undef PerlIO_setpos
3995 PerlIO_setpos(PerlIO *f, SV *pos)
4000 Off_t *posn = (Off_t *) SvPV(pos, len);
4001 if (f && len == sizeof(Off_t))
4002 return PerlIO_seek(f, *posn, SEEK_SET);
4004 SETERRNO(EINVAL, SS$_IVCHAN);
4008 #undef PerlIO_setpos
4010 PerlIO_setpos(PerlIO *f, SV *pos)
4015 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4016 if (f && len == sizeof(Fpos_t)) {
4017 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4018 return fsetpos64(f, fpos);
4020 return fsetpos(f, fpos);
4024 SETERRNO(EINVAL, SS$_IVCHAN);
4030 #undef PerlIO_getpos
4032 PerlIO_getpos(PerlIO *f, SV *pos)
4035 Off_t posn = PerlIO_tell(f);
4036 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4037 return (posn == (Off_t) - 1) ? -1 : 0;
4040 #undef PerlIO_getpos
4042 PerlIO_getpos(PerlIO *f, SV *pos)
4047 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4048 code = fgetpos64(f, &fpos);
4050 code = fgetpos(f, &fpos);
4052 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4057 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4060 vprintf(char *pat, char *args)
4062 _doprnt(pat, args, stdout);
4063 return 0; /* wrong, but perl doesn't use the return
4068 vfprintf(FILE *fd, char *pat, char *args)
4070 _doprnt(pat, args, fd);
4071 return 0; /* wrong, but perl doesn't use the return
4077 #ifndef PerlIO_vsprintf
4079 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4081 int val = vsprintf(s, fmt, ap);
4083 if (strlen(s) >= (STRLEN) n) {
4085 (void) PerlIO_puts(Perl_error_log,
4086 "panic: sprintf overflow - memory corrupted!\n");
4094 #ifndef PerlIO_sprintf
4096 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4101 result = PerlIO_vsprintf(s, n, fmt, ap);