2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
9 * at the dispatch tables, even when we do not need it for other reasons.
10 * Invent a dSYS macro to abstract this out
12 #ifdef PERL_IMPLICIT_SYS
25 #define PERLIO_NOT_STDIO 0
26 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 * This file provides those parts of PerlIO abstraction
33 * which are not #defined in perlio.h.
34 * Which these are depends on various Configure #ifdef's
38 #define PERL_IN_PERLIO_C
44 perlsio_binmode(FILE *fp, int iotype, int mode)
47 * This used to be contents of do_binmode in doio.c
50 # if defined(atarist) || defined(__MINT__)
53 ((FILE *) fp)->_flag |= _IOBIN;
55 ((FILE *) fp)->_flag &= ~_IOBIN;
62 if (PerlLIO_setmode(fp, mode) != -1) {
64 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
66 # if defined(WIN32) && defined(__BORLANDC__)
68 * The translation mode of the stream is maintained independent of
69 * the translation mode of the fd in the Borland RTL (heavy
70 * digging through their runtime sources reveal). User has to set
71 * the mode explicitly for the stream (though they don't document
72 * this anywhere). GSAR 97-5-24
86 # if defined(USEMYBINMODE)
87 if (my_binmode(fp, iotype, mode) != FALSE)
98 #define O_ACCMODE 3 /* Assume traditional implementation */
102 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
104 int result = rawmode & O_ACCMODE;
109 ptype = IoTYPE_RDONLY;
112 ptype = IoTYPE_WRONLY;
120 *writing = (result != O_RDONLY);
122 if (result == O_RDONLY) {
126 else if (rawmode & O_APPEND) {
128 if (result != O_WRONLY)
133 if (result == O_WRONLY)
140 if (rawmode & O_BINARY)
146 #ifndef PERLIO_LAYERS
148 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
150 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
153 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
161 PerlIO_destruct(pTHX)
166 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
171 return perlsio_binmode(fp, iotype, mode);
176 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
180 int fd = PerlLIO_dup(PerlIO_fileno(f));
183 int omode = fcntl(fd, F_GETFL);
184 PerlIO_intmode2str(omode,mode,NULL);
185 /* the r+ is a hack */
186 return PerlIO_fdopen(fd, mode);
191 SETERRNO(EBADF, SS$_IVCHAN);
199 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
203 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
204 int imode, int perm, PerlIO *old, int narg, SV **args)
207 if (*args == &PL_sv_undef)
208 return PerlIO_tmpfile();
210 char *name = SvPV_nolen(*args);
212 fd = PerlLIO_open3(name, imode, perm);
214 return PerlIO_fdopen(fd, (char *) mode + 1);
217 return PerlIO_reopen(name, mode, old);
220 return PerlIO_open(name, mode);
225 return PerlIO_fdopen(fd, (char *) mode);
230 XS(XS_PerlIO__Layer__find)
234 Perl_croak(aTHX_ "Usage class->find(name[,load])");
236 char *name = SvPV_nolen(ST(1));
237 ST(0) = (strEQ(name, "crlf")
238 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
245 Perl_boot_core_PerlIO(pTHX)
247 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
253 #ifdef PERLIO_IS_STDIO
259 * Does nothing (yet) except force this file to be included in perl
260 * binary. That allows this file to force inclusion of other functions
261 * that may be required by loadable extensions e.g. for
262 * FileHandle::tmpfile
266 #undef PerlIO_tmpfile
273 #else /* PERLIO_IS_STDIO */
281 * This section is just to make sure these functions get pulled in from
285 #undef PerlIO_tmpfile
296 * Force this file to be included in perl binary. Which allows this
297 * file to force inclusion of other functions that may be required by
298 * loadable extensions e.g. for FileHandle::tmpfile
302 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
303 * results in a lot of lseek()s to regular files and lot of small
306 sfset(sfstdout, SF_SHARE, 0);
310 PerlIO_importFILE(FILE *stdio, int fl)
312 int fd = fileno(stdio);
313 PerlIO *r = PerlIO_fdopen(fd, "r+");
318 PerlIO_findFILE(PerlIO *pio)
320 int fd = PerlIO_fileno(pio);
321 FILE *f = fdopen(fd, "r+");
323 if (!f && errno == EINVAL)
325 if (!f && errno == EINVAL)
332 /*======================================================================================*/
334 * Implement all the PerlIO interface ourselves.
340 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
347 #include <sys/mman.h>
351 void PerlIO_debug(const char *fmt, ...)
352 __attribute__ ((format(__printf__, 1, 2)));
355 PerlIO_debug(const char *fmt, ...)
362 char *s = PerlEnv_getenv("PERLIO_DEBUG");
364 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
371 /* Use fixed buffer as sv_catpvf etc. needs SVs */
375 s = CopFILE(PL_curcop);
378 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
379 len = strlen(buffer);
380 vsprintf(buffer+len, fmt, ap);
381 PerlLIO_write(dbg, buffer, strlen(buffer));
383 SV *sv = newSVpvn("", 0);
386 s = CopFILE(PL_curcop);
389 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
390 (IV) CopLINE(PL_curcop));
391 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
394 PerlLIO_write(dbg, s, len);
401 /*--------------------------------------------------------------------------------------*/
404 * Inner level routines
408 * Table of pointers to the PerlIO structs (malloc'ed)
410 #define PERLIO_TABLE_SIZE 64
413 PerlIO_allocate(pTHX)
416 * Find a free slot in the table, allocating new table as necessary
421 while ((f = *last)) {
423 last = (PerlIO **) (f);
424 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
430 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
438 #undef PerlIO_fdupopen
440 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
443 PerlIO_funcs *tab = PerlIOBase(f)->tab;
445 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
446 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
450 SETERRNO(EBADF, SS$_IVCHAN);
456 PerlIO_cleantable(pTHX_ PerlIO **tablep)
458 PerlIO *table = *tablep;
461 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
462 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
463 PerlIO *f = table + i;
475 PerlIO_list_alloc(pTHX)
478 Newz('L', list, 1, PerlIO_list_t);
484 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
487 if (--list->refcnt == 0) {
490 for (i = 0; i < list->cur; i++) {
491 if (list->array[i].arg)
492 SvREFCNT_dec(list->array[i].arg);
494 Safefree(list->array);
502 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
505 if (list->cur >= list->len) {
508 Renew(list->array, list->len, PerlIO_pair_t);
510 New('l', list->array, list->len, PerlIO_pair_t);
512 p = &(list->array[list->cur++]);
514 if ((p->arg = arg)) {
520 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
523 PerlIO_list_t *list = PerlIO_list_alloc(aTHX);
524 for (i=0; i < proto->cur; i++) {
526 if (proto->array[i].arg)
527 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
528 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
534 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
537 PerlIO **table = &proto->Iperlio;
540 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
541 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
542 PerlIO_allocate(aTHX); /* root slot is never used */
543 while ((f = *table)) {
545 table = (PerlIO **) (f++);
546 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
548 (void) fp_dup(f, 0, param);
557 PerlIO_destruct(pTHX)
559 PerlIO **table = &PL_perlio;
561 while ((f = *table)) {
563 table = (PerlIO **) (f++);
564 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
568 if (l->tab->kind & PERLIO_K_DESTRUCT) {
569 PerlIO_debug("Destruct popping %s\n", l->tab->name);
580 PerlIO_list_free(aTHX_ PL_known_layers);
581 PL_known_layers = NULL;
582 PerlIO_list_free(aTHX_ PL_def_layerlist);
583 PL_def_layerlist = NULL;
587 PerlIO_pop(pTHX_ PerlIO *f)
591 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
592 if (l->tab->Popped) {
594 * If popped returns non-zero do not free its layer structure
595 * it has either done so itself, or it is shared and still in
598 if ((*l->tab->Popped) (f) != 0)
606 /*--------------------------------------------------------------------------------------*/
608 * XS Interface for perl code
612 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
615 if ((SSize_t) len <= 0)
617 for (i = 0; i < PL_known_layers->cur; i++) {
618 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
619 if (memEQ(f->name, name, len)) {
620 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
624 if (load && PL_subname && PL_def_layerlist
625 && PL_def_layerlist->cur >= 2) {
626 SV *pkgsv = newSVpvn("PerlIO", 6);
627 SV *layer = newSVpvn(name, len);
630 * The two SVs are magically freed by load_module
632 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
634 return PerlIO_find_layer(aTHX_ name, len, 0);
636 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
640 #ifdef USE_ATTRIBUTES_FOR_PERLIO
643 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
646 IO *io = GvIOn((GV *) SvRV(sv));
647 PerlIO *ifp = IoIFP(io);
648 PerlIO *ofp = IoOFP(io);
649 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
655 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
658 IO *io = GvIOn((GV *) SvRV(sv));
659 PerlIO *ifp = IoIFP(io);
660 PerlIO *ofp = IoOFP(io);
661 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
667 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
669 Perl_warn(aTHX_ "clear %" SVf, sv);
674 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
676 Perl_warn(aTHX_ "free %" SVf, sv);
680 MGVTBL perlio_vtab = {
688 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
691 SV *sv = SvRV(ST(1));
696 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
698 mg = mg_find(sv, PERL_MAGIC_ext);
699 mg->mg_virtual = &perlio_vtab;
701 Perl_warn(aTHX_ "attrib %" SVf, sv);
702 for (i = 2; i < items; i++) {
704 const char *name = SvPV(ST(i), len);
705 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
707 av_push(av, SvREFCNT_inc(layer));
718 #endif /* USE_ATTIBUTES_FOR_PERLIO */
721 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
723 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
724 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
728 XS(XS_PerlIO__Layer__find)
732 Perl_croak(aTHX_ "Usage class->find(name[,load])");
735 char *name = SvPV(ST(1), len);
736 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
737 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
739 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
746 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
748 if (!PL_known_layers)
749 PL_known_layers = PerlIO_list_alloc(aTHX);
750 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
751 PerlIO_debug("define %s %p\n", tab->name, tab);
755 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
758 const char *s = names;
760 while (isSPACE(*s) || *s == ':')
765 const char *as = Nullch;
767 if (!isIDFIRST(*s)) {
769 * Message is consistent with how attribute lists are
770 * passed. Even though this means "foo : : bar" is
771 * seen as an invalid separator character.
773 char q = ((*s == '\'') ? '"' : '\'');
775 "perlio: invalid separator character %c%c%c in layer specification list",
781 } while (isALNUM(*e));
797 * It's a nul terminated string, not allowed
798 * to \ the terminating null. Anything other
799 * character is passed over.
810 "perlio: argument list not closed for layer \"%.*s\"",
822 PerlIO_funcs *layer =
823 PerlIO_find_layer(aTHX_ s, llen, 1);
825 PerlIO_list_push(aTHX_ av, layer,
831 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
844 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
846 PerlIO_funcs *tab = &PerlIO_perlio;
847 if (O_BINARY != O_TEXT) {
851 if (PerlIO_stdio.Set_ptrcnt) {
855 PerlIO_debug("Pushing %s\n", tab->name);
856 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
861 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
863 return av->array[n].arg;
867 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
869 if (n >= 0 && n < av->cur) {
870 PerlIO_debug("Layer %" IVdf " is %s\n", n,
871 av->array[n].funcs->name);
872 return av->array[n].funcs;
875 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
880 PerlIO_default_layers(pTHX)
882 if (!PL_def_layerlist) {
883 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
884 PerlIO_funcs *osLayer = &PerlIO_unix;
885 PL_def_layerlist = PerlIO_list_alloc(aTHX);
886 PerlIO_define_layer(aTHX_ & PerlIO_unix);
887 #if defined(WIN32) && !defined(UNDER_CE)
888 PerlIO_define_layer(aTHX_ & PerlIO_win32);
890 osLayer = &PerlIO_win32;
893 PerlIO_define_layer(aTHX_ & PerlIO_raw);
894 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
895 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
896 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
898 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
900 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
901 PerlIO_define_layer(aTHX_ & PerlIO_byte);
902 PerlIO_list_push(aTHX_ PL_def_layerlist,
903 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
906 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
909 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
912 if (PL_def_layerlist->cur < 2) {
913 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
915 return PL_def_layerlist;
919 Perl_boot_core_PerlIO(pTHX)
921 #ifdef USE_ATTRIBUTES_FOR_PERLIO
922 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
925 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
929 PerlIO_default_layer(pTHX_ I32 n)
931 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
934 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
937 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
938 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
941 PerlIO_stdstreams(pTHX)
944 PerlIO_allocate(aTHX);
945 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
946 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
947 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
952 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
955 Newc('L',l,tab->size,char,PerlIOl);
957 Zero(l, tab->size, char);
961 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
962 (mode) ? mode : "(Null)", arg);
963 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
972 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
985 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
988 * Remove the dummy layer
993 * Pop back to bottom layer
997 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
998 if (*PerlIONext(f)) {
1003 * Nothing bellow - push unix on top then remove it
1005 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1006 PerlIO_pop(aTHX_ PerlIONext(f));
1011 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1018 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1019 PerlIO_list_t *layers, IV n)
1021 IV max = layers->cur;
1024 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1026 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1037 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1041 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1042 code = PerlIO_parse_layers(aTHX_ layers, names);
1044 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1046 PerlIO_list_free(aTHX_ layers);
1052 /*--------------------------------------------------------------------------------------*/
1054 * Given the abstraction above the public API functions
1058 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1060 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1061 f, PerlIOBase(f)->tab->name, iotype, mode,
1062 (names) ? names : "(Null)");
1064 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1067 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1068 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1071 top = PerlIONext(top);
1075 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1078 #undef PerlIO__close
1080 PerlIO__close(PerlIO *f)
1083 return (*PerlIOBase(f)->tab->Close) (f);
1085 SETERRNO(EBADF, SS$_IVCHAN);
1092 PerlIO_close(PerlIO *f)
1097 code = (*PerlIOBase(f)->tab->Close) (f);
1099 PerlIO_pop(aTHX_ f);
1105 #undef PerlIO_fileno
1107 PerlIO_fileno(PerlIO *f)
1110 return (*PerlIOBase(f)->tab->Fileno) (f);
1112 SETERRNO(EBADF, SS$_IVCHAN);
1118 PerlIO_context_layers(pTHX_ const char *mode)
1120 const char *type = NULL;
1122 * Need to supply default layer info from open.pm
1125 SV *layers = PL_curcop->cop_io;
1128 type = SvPV(layers, len);
1129 if (type && mode[0] != 'r') {
1131 * Skip to write part
1133 const char *s = strchr(type, 0);
1134 if (s && (s - type) < len) {
1143 static PerlIO_funcs *
1144 PerlIO_layer_from_ref(pTHX_ SV *sv)
1147 * For any scalar type load the handler which is bundled with perl
1149 if (SvTYPE(sv) < SVt_PVAV)
1150 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1153 * For other types allow if layer is known but don't try and load it
1155 switch (SvTYPE(sv)) {
1157 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1159 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1161 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1163 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1169 PerlIO_resolve_layers(pTHX_ const char *layers,
1170 const char *mode, int narg, SV **args)
1172 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1175 PerlIO_stdstreams(aTHX);
1179 * If it is a reference but not an object see if we have a handler
1182 if (SvROK(arg) && !sv_isobject(arg)) {
1183 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1185 def = PerlIO_list_alloc(aTHX);
1186 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1190 * Don't fail if handler cannot be found :Via(...) etc. may do
1191 * something sensible else we will just stringfy and open
1197 layers = PerlIO_context_layers(aTHX_ mode);
1198 if (layers && *layers) {
1202 av = PerlIO_list_alloc(aTHX);
1203 for (i = 0; i < def->cur; i++) {
1204 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1211 PerlIO_parse_layers(aTHX_ av, layers);
1222 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1223 int imode, int perm, PerlIO *f, int narg, SV **args)
1225 if (!f && narg == 1 && *args == &PL_sv_undef) {
1226 if ((f = PerlIO_tmpfile())) {
1228 layers = PerlIO_context_layers(aTHX_ mode);
1229 if (layers && *layers)
1230 PerlIO_apply_layers(aTHX_ f, mode, layers);
1234 PerlIO_list_t *layera = NULL;
1236 PerlIO_funcs *tab = NULL;
1239 * This is "reopen" - it is not tested as perl does not use it
1243 layera = PerlIO_list_alloc(aTHX);
1246 (l->tab->Getarg) ? (*l->tab->
1247 Getarg) (&l) : &PL_sv_undef;
1248 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1249 l = *PerlIONext(&l);
1253 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1256 * Start at "top" of layer stack
1258 n = layera->cur - 1;
1260 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1269 * Found that layer 'n' can do opens - call it
1271 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1272 tab->name, layers, mode, fd, imode, perm, f, narg,
1274 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1277 if (n + 1 < layera->cur) {
1279 * More layers above the one that we used to open -
1282 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1289 PerlIO_list_free(aTHX_ layera);
1295 #undef PerlIO_fdopen
1297 PerlIO_fdopen(int fd, const char *mode)
1300 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1305 PerlIO_open(const char *path, const char *mode)
1308 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1309 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1312 #undef PerlIO_reopen
1314 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1317 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1318 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1323 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1326 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1328 SETERRNO(EBADF, SS$_IVCHAN);
1333 #undef PerlIO_unread
1335 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1338 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1340 SETERRNO(EBADF, SS$_IVCHAN);
1347 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1350 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1352 SETERRNO(EBADF, SS$_IVCHAN);
1359 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1362 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1364 SETERRNO(EBADF, SS$_IVCHAN);
1371 PerlIO_tell(PerlIO *f)
1374 return (*PerlIOBase(f)->tab->Tell) (f);
1376 SETERRNO(EBADF, SS$_IVCHAN);
1383 PerlIO_flush(PerlIO *f)
1387 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1388 if (tab && tab->Flush) {
1389 return (*tab->Flush) (f);
1392 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1393 SETERRNO(EBADF, SS$_IVCHAN);
1398 PerlIO_debug("Cannot flush f=%p\n", f);
1399 SETERRNO(EBADF, SS$_IVCHAN);
1405 * Is it good API design to do flush-all on NULL, a potentially
1406 * errorneous input? Maybe some magical value (PerlIO*
1407 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1408 * things on fflush(NULL), but should we be bound by their design
1412 PerlIO **table = &PL_perlio;
1414 while ((f = *table)) {
1416 table = (PerlIO **) (f++);
1417 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1418 if (*f && PerlIO_flush(f) != 0)
1428 PerlIOBase_flush_linebuf()
1431 PerlIO **table = &PL_perlio;
1433 while ((f = *table)) {
1435 table = (PerlIO **) (f++);
1436 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1439 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1440 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1449 PerlIO_fill(PerlIO *f)
1452 return (*PerlIOBase(f)->tab->Fill) (f);
1454 SETERRNO(EBADF, SS$_IVCHAN);
1459 #undef PerlIO_isutf8
1461 PerlIO_isutf8(PerlIO *f)
1464 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1466 SETERRNO(EBADF, SS$_IVCHAN);
1473 PerlIO_eof(PerlIO *f)
1476 return (*PerlIOBase(f)->tab->Eof) (f);
1478 SETERRNO(EBADF, SS$_IVCHAN);
1485 PerlIO_error(PerlIO *f)
1488 return (*PerlIOBase(f)->tab->Error) (f);
1490 SETERRNO(EBADF, SS$_IVCHAN);
1495 #undef PerlIO_clearerr
1497 PerlIO_clearerr(PerlIO *f)
1500 (*PerlIOBase(f)->tab->Clearerr) (f);
1502 SETERRNO(EBADF, SS$_IVCHAN);
1505 #undef PerlIO_setlinebuf
1507 PerlIO_setlinebuf(PerlIO *f)
1510 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1512 SETERRNO(EBADF, SS$_IVCHAN);
1515 #undef PerlIO_has_base
1517 PerlIO_has_base(PerlIO *f)
1520 return (PerlIOBase(f)->tab->Get_base != NULL);
1525 #undef PerlIO_fast_gets
1527 PerlIO_fast_gets(PerlIO *f)
1529 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1530 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1531 return (tab->Set_ptrcnt != NULL);
1536 #undef PerlIO_has_cntptr
1538 PerlIO_has_cntptr(PerlIO *f)
1541 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1542 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1547 #undef PerlIO_canset_cnt
1549 PerlIO_canset_cnt(PerlIO *f)
1552 PerlIOl *l = PerlIOBase(f);
1553 return (l->tab->Set_ptrcnt != NULL);
1558 #undef PerlIO_get_base
1560 PerlIO_get_base(PerlIO *f)
1563 return (*PerlIOBase(f)->tab->Get_base) (f);
1567 #undef PerlIO_get_bufsiz
1569 PerlIO_get_bufsiz(PerlIO *f)
1572 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1576 #undef PerlIO_get_ptr
1578 PerlIO_get_ptr(PerlIO *f)
1580 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1581 if (tab->Get_ptr == NULL)
1583 return (*tab->Get_ptr) (f);
1586 #undef PerlIO_get_cnt
1588 PerlIO_get_cnt(PerlIO *f)
1590 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1591 if (tab->Get_cnt == NULL)
1593 return (*tab->Get_cnt) (f);
1596 #undef PerlIO_set_cnt
1598 PerlIO_set_cnt(PerlIO *f, int cnt)
1600 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1603 #undef PerlIO_set_ptrcnt
1605 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1607 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1608 if (tab->Set_ptrcnt == NULL) {
1610 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1612 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1615 /*--------------------------------------------------------------------------------------*/
1617 * utf8 and raw dummy layers
1621 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1623 if (PerlIONext(f)) {
1625 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1626 PerlIO_pop(aTHX_ f);
1627 if (tab->kind & PERLIO_K_UTF8)
1628 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1630 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1636 PerlIO_funcs PerlIO_utf8 = {
1639 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1657 NULL, /* get_base */
1658 NULL, /* get_bufsiz */
1661 NULL, /* set_ptrcnt */
1664 PerlIO_funcs PerlIO_byte = {
1685 NULL, /* get_base */
1686 NULL, /* get_bufsiz */
1689 NULL, /* set_ptrcnt */
1693 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1694 IV n, const char *mode, int fd, int imode, int perm,
1695 PerlIO *old, int narg, SV **args)
1697 PerlIO_funcs *tab = PerlIO_default_btm();
1698 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1702 PerlIO_funcs PerlIO_raw = {
1723 NULL, /* get_base */
1724 NULL, /* get_bufsiz */
1727 NULL, /* set_ptrcnt */
1729 /*--------------------------------------------------------------------------------------*/
1730 /*--------------------------------------------------------------------------------------*/
1732 * "Methods" of the "base class"
1736 PerlIOBase_fileno(PerlIO *f)
1738 return PerlIO_fileno(PerlIONext(f));
1742 PerlIO_modestr(PerlIO *f, char *buf)
1745 IV flags = PerlIOBase(f)->flags;
1746 if (flags & PERLIO_F_APPEND) {
1748 if (flags & PERLIO_F_CANREAD) {
1752 else if (flags & PERLIO_F_CANREAD) {
1754 if (flags & PERLIO_F_CANWRITE)
1757 else if (flags & PERLIO_F_CANWRITE) {
1759 if (flags & PERLIO_F_CANREAD) {
1763 #if O_TEXT != O_BINARY
1764 if (!(flags & PERLIO_F_CRLF))
1772 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1774 PerlIOl *l = PerlIOBase(f);
1776 const char *omode = mode;
1779 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1780 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1781 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1782 if (tab->Set_ptrcnt != NULL)
1783 l->flags |= PERLIO_F_FASTGETS;
1785 if (*mode == '#' || *mode == 'I')
1789 l->flags |= PERLIO_F_CANREAD;
1792 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1795 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1798 SETERRNO(EINVAL, LIB$_INVARG);
1804 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1807 l->flags &= ~PERLIO_F_CRLF;
1810 l->flags |= PERLIO_F_CRLF;
1813 SETERRNO(EINVAL, LIB$_INVARG);
1820 l->flags |= l->next->flags &
1821 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1826 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1827 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1828 l->flags, PerlIO_modestr(f, temp));
1834 PerlIOBase_popped(PerlIO *f)
1840 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1844 * Save the position as current head considers it
1846 Off_t old = PerlIO_tell(f);
1848 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1849 PerlIOSelf(f, PerlIOBuf)->posn = old;
1850 done = PerlIOBuf_unread(f, vbuf, count);
1855 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1857 STDCHAR *buf = (STDCHAR *) vbuf;
1859 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1862 SSize_t avail = PerlIO_get_cnt(f);
1865 take = (count < avail) ? count : avail;
1867 STDCHAR *ptr = PerlIO_get_ptr(f);
1868 Copy(ptr, buf, take, STDCHAR);
1869 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1873 if (count > 0 && avail <= 0) {
1874 if (PerlIO_fill(f) != 0)
1878 return (buf - (STDCHAR *) vbuf);
1884 PerlIOBase_noop_ok(PerlIO *f)
1890 PerlIOBase_noop_fail(PerlIO *f)
1896 PerlIOBase_close(PerlIO *f)
1899 PerlIO *n = PerlIONext(f);
1900 if (PerlIO_flush(f) != 0)
1902 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1904 PerlIOBase(f)->flags &=
1905 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1910 PerlIOBase_eof(PerlIO *f)
1913 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1919 PerlIOBase_error(PerlIO *f)
1922 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1928 PerlIOBase_clearerr(PerlIO *f)
1931 PerlIO *n = PerlIONext(f);
1932 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1939 PerlIOBase_setlinebuf(PerlIO *f)
1942 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1947 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1953 return sv_dup(arg, param);
1956 return newSVsv(arg);
1959 return newSVsv(arg);
1964 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1966 PerlIO *nexto = PerlIONext(o);
1968 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1969 f = (*tab->Dup)(aTHX_ f, nexto, param);
1972 PerlIO_funcs *self = PerlIOBase(o)->tab;
1975 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1977 arg = (*self->Getarg)(o);
1979 arg = PerlIO_sv_dup(aTHX_ arg, param);
1982 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1990 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1992 perl_mutex PerlIO_mutex;
1994 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
1999 /* Place holder for stdstreams call ??? */
2001 MUTEX_INIT(&PerlIO_mutex);
2006 PerlIOUnix_refcnt_inc(int fd)
2008 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2010 MUTEX_LOCK(&PerlIO_mutex);
2012 PerlIO_fd_refcnt[fd]++;
2013 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2015 MUTEX_UNLOCK(&PerlIO_mutex);
2021 PerlIO_cleanup(pTHX)
2023 PerlIOUnix_refcnt_inc(0);
2024 PerlIOUnix_refcnt_inc(1);
2025 PerlIOUnix_refcnt_inc(2);
2026 PerlIO_cleantable(aTHX_ &PL_perlio);
2030 PerlIOUnix_refcnt_dec(int fd)
2033 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2035 MUTEX_LOCK(&PerlIO_mutex);
2037 cnt = --PerlIO_fd_refcnt[fd];
2038 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2040 MUTEX_UNLOCK(&PerlIO_mutex);
2046 /*--------------------------------------------------------------------------------------*/
2048 * Bottom-most level for UNIX-like case
2052 struct _PerlIO base; /* The generic part */
2053 int fd; /* UNIX like file descriptor */
2054 int oflags; /* open/fcntl flags */
2058 PerlIOUnix_oflags(const char *mode)
2061 if (*mode == 'I' || *mode == '#')
2066 if (*++mode == '+') {
2073 oflags = O_CREAT | O_TRUNC;
2074 if (*++mode == '+') {
2083 oflags = O_CREAT | O_APPEND;
2084 if (*++mode == '+') {
2097 else if (*mode == 't') {
2099 oflags &= ~O_BINARY;
2103 * Always open in binary mode
2106 if (*mode || oflags == -1) {
2107 SETERRNO(EINVAL, LIB$_INVARG);
2114 PerlIOUnix_fileno(PerlIO *f)
2116 return PerlIOSelf(f, PerlIOUnix)->fd;
2120 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2122 IV code = PerlIOBase_pushed(f, mode, arg);
2123 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2124 if (*PerlIONext(f)) {
2125 s->fd = PerlIO_fileno(PerlIONext(f));
2127 * XXX could (or should) we retrieve the oflags from the open file
2128 * handle rather than believing the "mode" we are passed in? XXX
2129 * Should the value on NULL mode be 0 or -1?
2131 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2133 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2138 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2139 IV n, const char *mode, int fd, int imode,
2140 int perm, PerlIO *f, int narg, SV **args)
2143 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2144 (*PerlIOBase(f)->tab->Close) (f);
2147 char *path = SvPV_nolen(*args);
2151 imode = PerlIOUnix_oflags(mode);
2155 fd = PerlLIO_open3(path, imode, perm);
2163 f = PerlIO_allocate(aTHX);
2164 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2168 s = PerlIOSelf(f, PerlIOUnix);
2171 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2172 PerlIOUnix_refcnt_inc(fd);
2178 * FIXME: pop layers ???
2186 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2188 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2190 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2191 f = PerlIOBase_dup(aTHX_ f, o, param);
2193 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2194 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2196 PerlIOUnix_refcnt_inc(fd);
2205 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2208 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2209 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2212 SSize_t len = PerlLIO_read(fd, vbuf, count);
2213 if (len >= 0 || errno != EINTR) {
2215 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2216 else if (len == 0 && count != 0)
2217 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2225 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2228 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2230 SSize_t len = PerlLIO_write(fd, vbuf, count);
2231 if (len >= 0 || errno != EINTR) {
2233 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2241 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2245 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2246 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2247 return (new == (Off_t) - 1) ? -1 : 0;
2251 PerlIOUnix_tell(PerlIO *f)
2254 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2259 PerlIOUnix_close(PerlIO *f)
2262 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2264 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2265 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2266 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2271 SETERRNO(EBADF,SS$_IVCHAN);
2274 while (PerlLIO_close(fd) != 0) {
2275 if (errno != EINTR) {
2282 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2287 PerlIO_funcs PerlIO_unix = {
2303 PerlIOBase_noop_ok, /* flush */
2304 PerlIOBase_noop_fail, /* fill */
2307 PerlIOBase_clearerr,
2308 PerlIOBase_setlinebuf,
2309 NULL, /* get_base */
2310 NULL, /* get_bufsiz */
2313 NULL, /* set_ptrcnt */
2316 /*--------------------------------------------------------------------------------------*/
2322 struct _PerlIO base;
2323 FILE *stdio; /* The stream */
2327 PerlIOStdio_fileno(PerlIO *f)
2330 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2334 PerlIOStdio_mode(const char *mode, char *tmode)
2340 if (O_BINARY != O_TEXT) {
2348 * This isn't used yet ...
2351 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2353 if (*PerlIONext(f)) {
2355 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2358 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2359 PerlIOStdio_mode(mode, tmode));
2365 return PerlIOBase_pushed(f, mode, arg);
2368 #undef PerlIO_importFILE
2370 PerlIO_importFILE(FILE *stdio, int fl)
2376 PerlIOSelf(PerlIO_push
2377 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2378 "r+", Nullsv), PerlIOStdio);
2385 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2386 IV n, const char *mode, int fd, int imode,
2387 int perm, PerlIO *f, int narg, SV **args)
2391 char *path = SvPV_nolen(*args);
2392 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2394 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2395 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2400 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2405 char *path = SvPV_nolen(*args);
2408 fd = PerlLIO_open3(path, imode, perm);
2411 FILE *stdio = PerlSIO_fopen(path, mode);
2414 PerlIOSelf(PerlIO_push
2415 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2416 (mode = PerlIOStdio_mode(mode, tmode)),
2420 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2435 stdio = PerlSIO_stdin;
2438 stdio = PerlSIO_stdout;
2441 stdio = PerlSIO_stderr;
2446 stdio = PerlSIO_fdopen(fd, mode =
2447 PerlIOStdio_mode(mode, tmode));
2451 PerlIOSelf(PerlIO_push
2452 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2453 mode, PerlIOArg), PerlIOStdio);
2455 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2464 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2466 /* This assumes no layers underneath - which is what
2467 happens, but is not how I remember it. NI-S 2001/10/16
2469 int fd = PerlIO_fileno(o);
2472 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2474 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2475 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2476 PerlIOUnix_refcnt_inc(fd);
2479 PerlSIO_fclose(stdio);
2491 PerlIOStdio_close(PerlIO *f)
2494 #ifdef SOCKS5_VERSION_NAME
2496 Sock_size_t optlen = sizeof(int);
2498 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2499 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2503 #ifdef SOCKS5_VERSION_NAME
2505 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2507 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2509 PerlSIO_fclose(stdio)
2518 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2521 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2524 STDCHAR *buf = (STDCHAR *) vbuf;
2526 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2527 * stdio does not do that for fread()
2529 int ch = PerlSIO_fgetc(s);
2536 got = PerlSIO_fread(vbuf, 1, count, s);
2541 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2544 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2545 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2548 int ch = *buf-- & 0xff;
2549 if (PerlSIO_ungetc(ch, s) != ch)
2558 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2561 return PerlSIO_fwrite(vbuf, 1, count,
2562 PerlIOSelf(f, PerlIOStdio)->stdio);
2566 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2569 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2570 return PerlSIO_fseek(stdio, offset, whence);
2574 PerlIOStdio_tell(PerlIO *f)
2577 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2578 return PerlSIO_ftell(stdio);
2582 PerlIOStdio_flush(PerlIO *f)
2585 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2586 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2587 return PerlSIO_fflush(stdio);
2592 * FIXME: This discards ungetc() and pre-read stuff which is not
2593 * right if this is just a "sync" from a layer above Suspect right
2594 * design is to do _this_ but not have layer above flush this
2595 * layer read-to-read
2598 * Not writeable - sync by attempting a seek
2601 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2609 PerlIOStdio_fill(PerlIO *f)
2612 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2615 * fflush()ing read-only streams can cause trouble on some stdio-s
2617 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2618 if (PerlSIO_fflush(stdio) != 0)
2621 c = PerlSIO_fgetc(stdio);
2622 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2628 PerlIOStdio_eof(PerlIO *f)
2631 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2635 PerlIOStdio_error(PerlIO *f)
2638 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2642 PerlIOStdio_clearerr(PerlIO *f)
2645 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2649 PerlIOStdio_setlinebuf(PerlIO *f)
2652 #ifdef HAS_SETLINEBUF
2653 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2655 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2661 PerlIOStdio_get_base(PerlIO *f)
2664 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2665 return PerlSIO_get_base(stdio);
2669 PerlIOStdio_get_bufsiz(PerlIO *f)
2672 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2673 return PerlSIO_get_bufsiz(stdio);
2677 #ifdef USE_STDIO_PTR
2679 PerlIOStdio_get_ptr(PerlIO *f)
2682 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2683 return PerlSIO_get_ptr(stdio);
2687 PerlIOStdio_get_cnt(PerlIO *f)
2690 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2691 return PerlSIO_get_cnt(stdio);
2695 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2697 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2700 #ifdef STDIO_PTR_LVALUE
2701 PerlSIO_set_ptr(stdio, ptr);
2702 #ifdef STDIO_PTR_LVAL_SETS_CNT
2703 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2705 assert(PerlSIO_get_cnt(stdio) == (cnt));
2708 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2710 * Setting ptr _does_ change cnt - we are done
2714 #else /* STDIO_PTR_LVALUE */
2716 #endif /* STDIO_PTR_LVALUE */
2719 * Now (or only) set cnt
2721 #ifdef STDIO_CNT_LVALUE
2722 PerlSIO_set_cnt(stdio, cnt);
2723 #else /* STDIO_CNT_LVALUE */
2724 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2725 PerlSIO_set_ptr(stdio,
2726 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2728 #else /* STDIO_PTR_LVAL_SETS_CNT */
2730 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2731 #endif /* STDIO_CNT_LVALUE */
2736 PerlIO_funcs PerlIO_stdio = {
2738 sizeof(PerlIOStdio),
2756 PerlIOStdio_clearerr,
2757 PerlIOStdio_setlinebuf,
2759 PerlIOStdio_get_base,
2760 PerlIOStdio_get_bufsiz,
2765 #ifdef USE_STDIO_PTR
2766 PerlIOStdio_get_ptr,
2767 PerlIOStdio_get_cnt,
2768 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2769 PerlIOStdio_set_ptrcnt
2770 #else /* STDIO_PTR_LVALUE */
2772 #endif /* STDIO_PTR_LVALUE */
2773 #else /* USE_STDIO_PTR */
2777 #endif /* USE_STDIO_PTR */
2780 #undef PerlIO_exportFILE
2782 PerlIO_exportFILE(PerlIO *f, int fl)
2786 stdio = fdopen(PerlIO_fileno(f), "r+");
2790 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2797 #undef PerlIO_findFILE
2799 PerlIO_findFILE(PerlIO *f)
2803 if (l->tab == &PerlIO_stdio) {
2804 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2807 l = *PerlIONext(&l);
2809 return PerlIO_exportFILE(f, 0);
2812 #undef PerlIO_releaseFILE
2814 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2818 /*--------------------------------------------------------------------------------------*/
2820 * perlio buffer layer
2824 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2827 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2828 int fd = PerlIO_fileno(f);
2830 if (fd >= 0 && PerlLIO_isatty(fd)) {
2831 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2833 posn = PerlIO_tell(PerlIONext(f));
2834 if (posn != (Off_t) - 1) {
2837 return PerlIOBase_pushed(f, mode, arg);
2841 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2842 IV n, const char *mode, int fd, int imode, int perm,
2843 PerlIO *f, int narg, SV **args)
2846 PerlIO *next = PerlIONext(f);
2848 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2850 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2853 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2859 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2867 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2870 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2871 fd = PerlIO_fileno(f);
2872 #if (O_BINARY != O_TEXT) && !defined(__BEOS__)
2874 * do something about failing setmode()? --jhi
2876 PerlLIO_setmode(fd, O_BINARY);
2878 if (init && fd == 2) {
2880 * Initial stderr is unbuffered
2882 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2890 * This "flush" is akin to sfio's sync in that it handles files in either
2891 * read or write state
2894 PerlIOBuf_flush(PerlIO *f)
2896 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2898 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2900 * write() the buffer
2902 STDCHAR *buf = b->buf;
2904 PerlIO *n = PerlIONext(f);
2905 while (p < b->ptr) {
2906 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2910 else if (count < 0 || PerlIO_error(n)) {
2911 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2916 b->posn += (p - buf);
2918 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2919 STDCHAR *buf = PerlIO_get_base(f);
2921 * Note position change
2923 b->posn += (b->ptr - buf);
2924 if (b->ptr < b->end) {
2926 * We did not consume all of it
2928 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2929 b->posn = PerlIO_tell(PerlIONext(f));
2933 b->ptr = b->end = b->buf;
2934 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2936 * FIXME: Is this right for read case ?
2938 if (PerlIO_flush(PerlIONext(f)) != 0)
2944 PerlIOBuf_fill(PerlIO *f)
2946 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2947 PerlIO *n = PerlIONext(f);
2950 * FIXME: doing the down-stream flush is a bad idea if it causes
2951 * pre-read data in stdio buffer to be discarded but this is too
2952 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2953 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2955 if (PerlIO_flush(f) != 0)
2957 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2958 PerlIOBase_flush_linebuf();
2961 PerlIO_get_base(f); /* allocate via vtable */
2963 b->ptr = b->end = b->buf;
2964 if (PerlIO_fast_gets(n)) {
2966 * Layer below is also buffered We do _NOT_ want to call its
2967 * ->Read() because that will loop till it gets what we asked for
2968 * which may hang on a pipe etc. Instead take anything it has to
2969 * hand, or ask it to fill _once_.
2971 avail = PerlIO_get_cnt(n);
2973 avail = PerlIO_fill(n);
2975 avail = PerlIO_get_cnt(n);
2977 if (!PerlIO_error(n) && PerlIO_eof(n))
2982 STDCHAR *ptr = PerlIO_get_ptr(n);
2983 SSize_t cnt = avail;
2984 if (avail > b->bufsiz)
2986 Copy(ptr, b->buf, avail, STDCHAR);
2987 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2991 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2995 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2997 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3000 b->end = b->buf + avail;
3001 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3006 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3008 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3012 return PerlIOBase_read(f, vbuf, count);
3018 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3020 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3021 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3024 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3029 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3031 * Buffer is already a read buffer, we can overwrite any chars
3032 * which have been read back to buffer start
3034 avail = (b->ptr - b->buf);
3038 * Buffer is idle, set it up so whole buffer is available for
3042 b->end = b->buf + avail;
3044 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3046 * Buffer extends _back_ from where we are now
3048 b->posn -= b->bufsiz;
3050 if (avail > (SSize_t) count) {
3052 * If we have space for more than count, just move count
3060 * In simple stdio-like ungetc() case chars will be already
3063 if (buf != b->ptr) {
3064 Copy(buf, b->ptr, avail, STDCHAR);
3068 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3075 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3077 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3078 const STDCHAR *buf = (const STDCHAR *) vbuf;
3082 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3085 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3086 if ((SSize_t) count < avail)
3088 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3089 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3104 Copy(buf, b->ptr, avail, STDCHAR);
3111 if (b->ptr >= (b->buf + b->bufsiz))
3114 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3120 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3123 if ((code = PerlIO_flush(f)) == 0) {
3124 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3125 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3126 code = PerlIO_seek(PerlIONext(f), offset, whence);
3128 b->posn = PerlIO_tell(PerlIONext(f));
3135 PerlIOBuf_tell(PerlIO *f)
3137 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3139 * b->posn is file position where b->buf was read, or will be written
3141 Off_t posn = b->posn;
3144 * If buffer is valid adjust position by amount in buffer
3146 posn += (b->ptr - b->buf);
3152 PerlIOBuf_close(PerlIO *f)
3154 IV code = PerlIOBase_close(f);
3155 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3156 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3160 b->ptr = b->end = b->buf;
3161 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3166 PerlIOBuf_get_ptr(PerlIO *f)
3168 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3175 PerlIOBuf_get_cnt(PerlIO *f)
3177 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3180 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3181 return (b->end - b->ptr);
3186 PerlIOBuf_get_base(PerlIO *f)
3188 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3193 Newz('B',b->buf,b->bufsiz, STDCHAR);
3195 b->buf = (STDCHAR *) & b->oneword;
3196 b->bufsiz = sizeof(b->oneword);
3205 PerlIOBuf_bufsiz(PerlIO *f)
3207 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3210 return (b->end - b->buf);
3214 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3216 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3220 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3222 assert(PerlIO_get_cnt(f) == cnt);
3223 assert(b->ptr >= b->buf);
3225 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3229 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3231 return PerlIOBase_dup(aTHX_ f, o, param);
3236 PerlIO_funcs PerlIO_perlio = {
3256 PerlIOBase_clearerr,
3257 PerlIOBase_setlinebuf,
3262 PerlIOBuf_set_ptrcnt,
3265 /*--------------------------------------------------------------------------------------*/
3267 * Temp layer to hold unread chars when cannot do it any other way
3271 PerlIOPending_fill(PerlIO *f)
3274 * Should never happen
3281 PerlIOPending_close(PerlIO *f)
3284 * A tad tricky - flush pops us, then we close new top
3287 return PerlIO_close(f);
3291 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3294 * A tad tricky - flush pops us, then we seek new top
3297 return PerlIO_seek(f, offset, whence);
3302 PerlIOPending_flush(PerlIO *f)
3305 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3306 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3310 PerlIO_pop(aTHX_ f);
3315 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3321 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3326 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3328 IV code = PerlIOBase_pushed(f, mode, arg);
3329 PerlIOl *l = PerlIOBase(f);
3331 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3332 * etc. get muddled when it changes mid-string when we auto-pop.
3334 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3335 (PerlIOBase(PerlIONext(f))->
3336 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3341 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3343 SSize_t avail = PerlIO_get_cnt(f);
3348 got = PerlIOBuf_read(f, vbuf, avail);
3349 if (got >= 0 && got < count) {
3351 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3352 if (more >= 0 || got == 0)
3358 PerlIO_funcs PerlIO_pending = {
3362 PerlIOPending_pushed,
3373 PerlIOPending_close,
3374 PerlIOPending_flush,
3378 PerlIOBase_clearerr,
3379 PerlIOBase_setlinebuf,
3384 PerlIOPending_set_ptrcnt,
3389 /*--------------------------------------------------------------------------------------*/
3391 * crlf - translation On read translate CR,LF to "\n" we do this by
3392 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3393 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3397 PerlIOBuf base; /* PerlIOBuf stuff */
3398 STDCHAR *nl; /* Position of crlf we "lied" about in the
3403 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3406 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3407 code = PerlIOBuf_pushed(f, mode, arg);
3409 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3410 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3411 PerlIOBase(f)->flags);
3418 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3420 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3425 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3426 return PerlIOBuf_unread(f, vbuf, count);
3428 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3429 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3431 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3436 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3437 b->end = b->ptr = b->buf + b->bufsiz;
3438 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3439 b->posn -= b->bufsiz;
3441 while (count > 0 && b->ptr > b->buf) {
3444 if (b->ptr - 2 >= b->buf) {
3467 PerlIOCrlf_get_cnt(PerlIO *f)
3469 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3472 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3473 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3474 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3475 STDCHAR *nl = b->ptr;
3477 while (nl < b->end && *nl != 0xd)
3479 if (nl < b->end && *nl == 0xd) {
3481 if (nl + 1 < b->end) {
3488 * Not CR,LF but just CR
3496 * Blast - found CR as last char in buffer
3500 * They may not care, defer work as long as
3503 return (nl - b->ptr);
3507 b->ptr++; /* say we have read it as far as
3508 * flush() is concerned */
3509 b->buf++; /* Leave space an front of buffer */
3510 b->bufsiz--; /* Buffer is thus smaller */
3511 code = PerlIO_fill(f); /* Fetch some more */
3512 b->bufsiz++; /* Restore size for next time */
3513 b->buf--; /* Point at space */
3514 b->ptr = nl = b->buf; /* Which is what we hand
3516 b->posn--; /* Buffer starts here */
3517 *nl = 0xd; /* Fill in the CR */
3519 goto test; /* fill() call worked */
3521 * CR at EOF - just fall through
3527 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3533 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3535 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3536 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3537 IV flags = PerlIOBase(f)->flags;
3545 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3552 * Test code - delete when it works ...
3559 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3566 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3567 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3574 * They have taken what we lied about
3582 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3586 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3588 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3589 return PerlIOBuf_write(f, vbuf, count);
3591 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3592 const STDCHAR *buf = (const STDCHAR *) vbuf;
3593 const STDCHAR *ebuf = buf + count;
3596 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3598 while (buf < ebuf) {
3599 STDCHAR *eptr = b->buf + b->bufsiz;
3600 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3601 while (buf < ebuf && b->ptr < eptr) {
3603 if ((b->ptr + 2) > eptr) {
3611 *(b->ptr)++ = 0xd; /* CR */
3612 *(b->ptr)++ = 0xa; /* LF */
3614 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3624 if (b->ptr >= eptr) {
3630 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3632 return (buf - (STDCHAR *) vbuf);
3637 PerlIOCrlf_flush(PerlIO *f)
3639 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3644 return PerlIOBuf_flush(f);
3647 PerlIO_funcs PerlIO_crlf = {
3650 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3652 PerlIOBase_noop_ok, /* popped */
3657 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3659 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3660 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3668 PerlIOBase_clearerr,
3669 PerlIOBase_setlinebuf,
3674 PerlIOCrlf_set_ptrcnt,
3678 /*--------------------------------------------------------------------------------------*/
3680 * mmap as "buffer" layer
3684 PerlIOBuf base; /* PerlIOBuf stuff */
3685 Mmap_t mptr; /* Mapped address */
3686 Size_t len; /* mapped length */
3687 STDCHAR *bbuf; /* malloced buffer if map fails */
3690 static size_t page_size = 0;
3693 PerlIOMmap_map(PerlIO *f)
3696 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3697 IV flags = PerlIOBase(f)->flags;
3701 if (flags & PERLIO_F_CANREAD) {
3702 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3703 int fd = PerlIO_fileno(f);
3705 code = Fstat(fd, &st);
3706 if (code == 0 && S_ISREG(st.st_mode)) {
3707 SSize_t len = st.st_size - b->posn;
3711 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3713 SETERRNO(0, SS$_NORMAL);
3714 # ifdef _SC_PAGESIZE
3715 page_size = sysconf(_SC_PAGESIZE);
3717 page_size = sysconf(_SC_PAGE_SIZE);
3719 if ((long) page_size < 0) {
3724 (void) SvUPGRADE(error, SVt_PV);
3725 msg = SvPVx(error, n_a);
3726 Perl_croak(aTHX_ "panic: sysconf: %s",
3731 "panic: sysconf: pagesize unknown");
3735 # ifdef HAS_GETPAGESIZE
3736 page_size = getpagesize();
3738 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3739 page_size = PAGESIZE; /* compiletime, bad */
3743 if ((IV) page_size <= 0)
3744 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3749 * This is a hack - should never happen - open should
3752 b->posn = PerlIO_tell(PerlIONext(f));
3754 posn = (b->posn / page_size) * page_size;
3755 len = st.st_size - posn;
3756 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3757 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3758 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3759 madvise(m->mptr, len, MADV_SEQUENTIAL);
3761 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3762 madvise(m->mptr, len, MADV_WILLNEED);
3764 PerlIOBase(f)->flags =
3765 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3766 b->end = ((STDCHAR *) m->mptr) + len;
3767 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3776 PerlIOBase(f)->flags =
3777 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3779 b->ptr = b->end = b->ptr;
3788 PerlIOMmap_unmap(PerlIO *f)
3790 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3791 PerlIOBuf *b = &m->base;
3795 code = munmap(m->mptr, m->len);
3799 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3802 b->ptr = b->end = b->buf;
3803 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3809 PerlIOMmap_get_base(PerlIO *f)
3811 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3812 PerlIOBuf *b = &m->base;
3813 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3815 * Already have a readbuffer in progress
3821 * We have a write buffer or flushed PerlIOBuf read buffer
3823 m->bbuf = b->buf; /* save it in case we need it again */
3824 b->buf = NULL; /* Clear to trigger below */
3827 PerlIOMmap_map(f); /* Try and map it */
3830 * Map did not work - recover PerlIOBuf buffer if we have one
3835 b->ptr = b->end = b->buf;
3838 return PerlIOBuf_get_base(f);
3842 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3844 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3845 PerlIOBuf *b = &m->base;
3846 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3848 if (b->ptr && (b->ptr - count) >= b->buf
3849 && memEQ(b->ptr - count, vbuf, count)) {
3851 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3856 * Loose the unwritable mapped buffer
3860 * If flush took the "buffer" see if we have one from before
3862 if (!b->buf && m->bbuf)
3865 PerlIOBuf_get_base(f);
3869 return PerlIOBuf_unread(f, vbuf, count);
3873 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3875 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3876 PerlIOBuf *b = &m->base;
3877 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3879 * No, or wrong sort of, buffer
3882 if (PerlIOMmap_unmap(f) != 0)
3886 * If unmap took the "buffer" see if we have one from before
3888 if (!b->buf && m->bbuf)
3891 PerlIOBuf_get_base(f);
3895 return PerlIOBuf_write(f, vbuf, count);
3899 PerlIOMmap_flush(PerlIO *f)
3901 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3902 PerlIOBuf *b = &m->base;
3903 IV code = PerlIOBuf_flush(f);
3905 * Now we are "synced" at PerlIOBuf level
3912 if (PerlIOMmap_unmap(f) != 0)
3917 * We seem to have a PerlIOBuf buffer which was not mapped
3918 * remember it in case we need one later
3927 PerlIOMmap_fill(PerlIO *f)
3929 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3930 IV code = PerlIO_flush(f);
3931 if (code == 0 && !b->buf) {
3932 code = PerlIOMmap_map(f);
3934 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3935 code = PerlIOBuf_fill(f);
3941 PerlIOMmap_close(PerlIO *f)
3943 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3944 PerlIOBuf *b = &m->base;
3945 IV code = PerlIO_flush(f);
3949 b->ptr = b->end = b->buf;
3951 if (PerlIOBuf_close(f) != 0)
3957 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3959 return PerlIOBase_dup(aTHX_ f, o, param);
3963 PerlIO_funcs PerlIO_mmap = {
3983 PerlIOBase_clearerr,
3984 PerlIOBase_setlinebuf,
3985 PerlIOMmap_get_base,
3989 PerlIOBuf_set_ptrcnt,
3992 #endif /* HAS_MMAP */
4000 PerlIO_stdstreams(aTHX);
4002 return &PL_perlio[1];
4005 #undef PerlIO_stdout
4011 PerlIO_stdstreams(aTHX);
4013 return &PL_perlio[2];
4016 #undef PerlIO_stderr
4022 PerlIO_stdstreams(aTHX);
4024 return &PL_perlio[3];
4027 /*--------------------------------------------------------------------------------------*/
4029 #undef PerlIO_getname
4031 PerlIO_getname(PerlIO *f, char *buf)
4036 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4038 name = fgetname(stdio, buf);
4040 Perl_croak(aTHX_ "Don't know how to get file name");
4046 /*--------------------------------------------------------------------------------------*/
4048 * Functions which can be called on any kind of PerlIO implemented in
4054 PerlIO_getc(PerlIO *f)
4057 SSize_t count = PerlIO_read(f, buf, 1);
4059 return (unsigned char) buf[0];
4064 #undef PerlIO_ungetc
4066 PerlIO_ungetc(PerlIO *f, int ch)
4070 if (PerlIO_unread(f, &buf, 1) == 1)
4078 PerlIO_putc(PerlIO *f, int ch)
4081 return PerlIO_write(f, &buf, 1);
4086 PerlIO_puts(PerlIO *f, const char *s)
4088 STRLEN len = strlen(s);
4089 return PerlIO_write(f, s, len);
4092 #undef PerlIO_rewind
4094 PerlIO_rewind(PerlIO *f)
4096 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4100 #undef PerlIO_vprintf
4102 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4105 SV *sv = newSVpvn("", 0);
4111 Perl_va_copy(ap, apc);
4112 sv_vcatpvf(sv, fmt, &apc);
4114 sv_vcatpvf(sv, fmt, &ap);
4117 wrote = PerlIO_write(f, s, len);
4122 #undef PerlIO_printf
4124 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4129 result = PerlIO_vprintf(f, fmt, ap);
4134 #undef PerlIO_stdoutf
4136 PerlIO_stdoutf(const char *fmt, ...)
4141 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4146 #undef PerlIO_tmpfile
4148 PerlIO_tmpfile(void)
4151 * I have no idea how portable mkstemp() is ...
4153 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4156 FILE *stdio = PerlSIO_tmpfile();
4159 PerlIOSelf(PerlIO_push
4160 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4161 "w+", Nullsv), PerlIOStdio);
4167 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4168 int fd = mkstemp(SvPVX(sv));
4171 f = PerlIO_fdopen(fd, "w+");
4173 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4175 PerlLIO_unlink(SvPVX(sv));
4185 #endif /* USE_SFIO */
4186 #endif /* PERLIO_IS_STDIO */
4188 /*======================================================================================*/
4190 * Now some functions in terms of above which may be needed even if we are
4191 * not in true PerlIO mode
4195 #undef PerlIO_setpos
4197 PerlIO_setpos(PerlIO *f, SV *pos)
4202 Off_t *posn = (Off_t *) SvPV(pos, len);
4203 if (f && len == sizeof(Off_t))
4204 return PerlIO_seek(f, *posn, SEEK_SET);
4206 SETERRNO(EINVAL, SS$_IVCHAN);
4210 #undef PerlIO_setpos
4212 PerlIO_setpos(PerlIO *f, SV *pos)
4217 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4218 if (f && len == sizeof(Fpos_t)) {
4219 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4220 return fsetpos64(f, fpos);
4222 return fsetpos(f, fpos);
4226 SETERRNO(EINVAL, SS$_IVCHAN);
4232 #undef PerlIO_getpos
4234 PerlIO_getpos(PerlIO *f, SV *pos)
4237 Off_t posn = PerlIO_tell(f);
4238 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4239 return (posn == (Off_t) - 1) ? -1 : 0;
4242 #undef PerlIO_getpos
4244 PerlIO_getpos(PerlIO *f, SV *pos)
4249 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4250 code = fgetpos64(f, &fpos);
4252 code = fgetpos(f, &fpos);
4254 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4259 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4262 vprintf(char *pat, char *args)
4264 _doprnt(pat, args, stdout);
4265 return 0; /* wrong, but perl doesn't use the return
4270 vfprintf(FILE *fd, char *pat, char *args)
4272 _doprnt(pat, args, fd);
4273 return 0; /* wrong, but perl doesn't use the return
4279 #ifndef PerlIO_vsprintf
4281 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4283 int val = vsprintf(s, fmt, ap);
4285 if (strlen(s) >= (STRLEN) n) {
4287 (void) PerlIO_puts(Perl_error_log,
4288 "panic: sprintf overflow - memory corrupted!\n");
4296 #ifndef PerlIO_sprintf
4298 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4303 result = PerlIO_vsprintf(s, n, fmt, ap);