2 * perlio.c Copyright (c) 1996-2002, 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 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
17 #ifdef PERL_IMPLICIT_SYS
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
43 #define PERL_IN_PERLIO_C
46 #ifdef PERL_IMPLICIT_CONTEXT
54 perlsio_binmode(FILE *fp, int iotype, int mode)
57 * This used to be contents of do_binmode in doio.c
60 # if defined(atarist) || defined(__MINT__)
63 ((FILE *) fp)->_flag |= _IOBIN;
65 ((FILE *) fp)->_flag &= ~_IOBIN;
72 if (PerlLIO_setmode(fp, mode) != -1) {
74 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
76 # if defined(WIN32) && defined(__BORLANDC__)
78 * The translation mode of the stream is maintained independent of
79 * the translation mode of the fd in the Borland RTL (heavy
80 * digging through their runtime sources reveal). User has to set
81 * the mode explicitly for the stream (though they don't document
82 * this anywhere). GSAR 97-5-24
96 # if defined(USEMYBINMODE)
98 if (my_binmode(fp, iotype, mode) != FALSE)
109 #define O_ACCMODE 3 /* Assume traditional implementation */
113 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
115 int result = rawmode & O_ACCMODE;
120 ptype = IoTYPE_RDONLY;
123 ptype = IoTYPE_WRONLY;
131 *writing = (result != O_RDONLY);
133 if (result == O_RDONLY) {
137 else if (rawmode & O_APPEND) {
139 if (result != O_WRONLY)
144 if (result == O_WRONLY)
151 if (rawmode & O_BINARY)
157 #ifndef PERLIO_LAYERS
159 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
161 if (!names || !*names
162 || strEQ(names, ":crlf")
163 || strEQ(names, ":raw")
164 || strEQ(names, ":bytes")
168 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
176 PerlIO_destruct(pTHX)
181 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
186 return perlsio_binmode(fp, iotype, mode);
191 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
196 #ifdef PERL_IMPLICIT_SYS
197 return PerlSIO_fdupopen(f);
200 return win32_fdupopen(f);
203 int fd = PerlLIO_dup(PerlIO_fileno(f));
206 int omode = fcntl(fd, F_GETFL);
208 omode = djgpp_get_stream_mode(f);
210 PerlIO_intmode2str(omode,mode,NULL);
211 /* the r+ is a hack */
212 return PerlIO_fdopen(fd, mode);
217 SETERRNO(EBADF, SS$_IVCHAN);
227 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
231 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
232 int imode, int perm, PerlIO *old, int narg, SV **args)
236 Perl_croak(aTHX_ "More than one argument to open");
238 if (*args == &PL_sv_undef)
239 return PerlIO_tmpfile();
241 char *name = SvPV_nolen(*args);
243 fd = PerlLIO_open3(name, imode, perm);
245 return PerlIO_fdopen(fd, (char *) mode + 1);
248 return PerlIO_reopen(name, mode, old);
251 return PerlIO_open(name, mode);
256 return PerlIO_fdopen(fd, (char *) mode);
261 XS(XS_PerlIO__Layer__find)
265 Perl_croak(aTHX_ "Usage class->find(name[,load])");
267 char *name = SvPV_nolen(ST(1));
268 ST(0) = (strEQ(name, "crlf")
269 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
276 Perl_boot_core_PerlIO(pTHX)
278 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
284 #ifdef PERLIO_IS_STDIO
290 * Does nothing (yet) except force this file to be included in perl
291 * binary. That allows this file to force inclusion of other functions
292 * that may be required by loadable extensions e.g. for
293 * FileHandle::tmpfile
297 #undef PerlIO_tmpfile
304 #else /* PERLIO_IS_STDIO */
312 * This section is just to make sure these functions get pulled in from
316 #undef PerlIO_tmpfile
327 * Force this file to be included in perl binary. Which allows this
328 * file to force inclusion of other functions that may be required by
329 * loadable extensions e.g. for FileHandle::tmpfile
333 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
334 * results in a lot of lseek()s to regular files and lot of small
337 sfset(sfstdout, SF_SHARE, 0);
341 PerlIO_importFILE(FILE *stdio, const char *mode)
343 int fd = fileno(stdio);
344 if (!mode || !*mode) {
347 return PerlIO_fdopen(fd, mode);
351 PerlIO_findFILE(PerlIO *pio)
353 int fd = PerlIO_fileno(pio);
354 FILE *f = fdopen(fd, "r+");
356 if (!f && errno == EINVAL)
358 if (!f && errno == EINVAL)
365 /*======================================================================================*/
367 * Implement all the PerlIO interface ourselves.
373 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
380 #include <sys/mman.h>
384 void PerlIO_debug(const char *fmt, ...)
385 __attribute__ ((format(__printf__, 1, 2)));
388 PerlIO_debug(const char *fmt, ...)
395 char *s = PerlEnv_getenv("PERLIO_DEBUG");
397 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
404 /* Use fixed buffer as sv_catpvf etc. needs SVs */
408 s = CopFILE(PL_curcop);
411 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
412 len = strlen(buffer);
413 vsprintf(buffer+len, fmt, ap);
414 PerlLIO_write(dbg, buffer, strlen(buffer));
416 SV *sv = newSVpvn("", 0);
419 s = CopFILE(PL_curcop);
422 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
423 (IV) CopLINE(PL_curcop));
424 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
427 PerlLIO_write(dbg, s, len);
434 /*--------------------------------------------------------------------------------------*/
437 * Inner level routines
441 * Table of pointers to the PerlIO structs (malloc'ed)
443 #define PERLIO_TABLE_SIZE 64
446 PerlIO_allocate(pTHX)
449 * Find a free slot in the table, allocating new table as necessary
454 while ((f = *last)) {
456 last = (PerlIO **) (f);
457 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
463 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
471 #undef PerlIO_fdupopen
473 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
475 if (PerlIOValid(f)) {
476 PerlIO_funcs *tab = PerlIOBase(f)->tab;
478 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
479 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
483 SETERRNO(EBADF, SS$_IVCHAN);
489 PerlIO_cleantable(pTHX_ PerlIO **tablep)
491 PerlIO *table = *tablep;
494 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
495 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
496 PerlIO *f = table + i;
508 PerlIO_list_alloc(pTHX)
511 Newz('L', list, 1, PerlIO_list_t);
517 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
520 if (--list->refcnt == 0) {
523 for (i = 0; i < list->cur; i++) {
524 if (list->array[i].arg)
525 SvREFCNT_dec(list->array[i].arg);
527 Safefree(list->array);
535 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
538 if (list->cur >= list->len) {
541 Renew(list->array, list->len, PerlIO_pair_t);
543 New('l', list->array, list->len, PerlIO_pair_t);
545 p = &(list->array[list->cur++]);
547 if ((p->arg = arg)) {
553 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
555 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
558 list = PerlIO_list_alloc(aTHX);
559 for (i=0; i < proto->cur; i++) {
561 if (proto->array[i].arg)
562 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
563 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
570 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
573 PerlIO **table = &proto->Iperlio;
576 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
577 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
578 PerlIO_allocate(aTHX); /* root slot is never used */
579 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
580 while ((f = *table)) {
582 table = (PerlIO **) (f++);
583 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
585 (void) fp_dup(f, 0, param);
594 PerlIO_destruct(pTHX)
596 PerlIO **table = &PL_perlio;
599 PerlIO_debug("Destruct %p\n",aTHX);
601 while ((f = *table)) {
603 table = (PerlIO **) (f++);
604 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
608 if (l->tab->kind & PERLIO_K_DESTRUCT) {
609 PerlIO_debug("Destruct popping %s\n", l->tab->name);
623 PerlIO_pop(pTHX_ PerlIO *f)
627 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
628 if (l->tab->Popped) {
630 * If popped returns non-zero do not free its layer structure
631 * it has either done so itself, or it is shared and still in
634 if ((*l->tab->Popped) (aTHX_ f) != 0)
642 /*--------------------------------------------------------------------------------------*/
644 * XS Interface for perl code
648 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
651 if ((SSize_t) len <= 0)
653 for (i = 0; i < PL_known_layers->cur; i++) {
654 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
655 if (memEQ(f->name, name, len)) {
656 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
660 if (load && PL_subname && PL_def_layerlist
661 && PL_def_layerlist->cur >= 2) {
662 SV *pkgsv = newSVpvn("PerlIO", 6);
663 SV *layer = newSVpvn(name, len);
666 * The two SVs are magically freed by load_module
668 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
670 return PerlIO_find_layer(aTHX_ name, len, 0);
672 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
676 #ifdef USE_ATTRIBUTES_FOR_PERLIO
679 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
682 IO *io = GvIOn((GV *) SvRV(sv));
683 PerlIO *ifp = IoIFP(io);
684 PerlIO *ofp = IoOFP(io);
685 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
691 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
694 IO *io = GvIOn((GV *) SvRV(sv));
695 PerlIO *ifp = IoIFP(io);
696 PerlIO *ofp = IoOFP(io);
697 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
703 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
705 Perl_warn(aTHX_ "clear %" SVf, sv);
710 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
712 Perl_warn(aTHX_ "free %" SVf, sv);
716 MGVTBL perlio_vtab = {
724 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
727 SV *sv = SvRV(ST(1));
732 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
734 mg = mg_find(sv, PERL_MAGIC_ext);
735 mg->mg_virtual = &perlio_vtab;
737 Perl_warn(aTHX_ "attrib %" SVf, sv);
738 for (i = 2; i < items; i++) {
740 const char *name = SvPV(ST(i), len);
741 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
743 av_push(av, SvREFCNT_inc(layer));
754 #endif /* USE_ATTIBUTES_FOR_PERLIO */
757 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
759 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
760 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
764 XS(XS_PerlIO__Layer__find)
768 Perl_croak(aTHX_ "Usage class->find(name[,load])");
771 char *name = SvPV(ST(1), len);
772 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
773 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
775 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
782 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
784 if (!PL_known_layers)
785 PL_known_layers = PerlIO_list_alloc(aTHX);
786 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
787 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
791 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
794 const char *s = names;
796 while (isSPACE(*s) || *s == ':')
801 const char *as = Nullch;
803 if (!isIDFIRST(*s)) {
805 * Message is consistent with how attribute lists are
806 * passed. Even though this means "foo : : bar" is
807 * seen as an invalid separator character.
809 char q = ((*s == '\'') ? '"' : '\'');
810 if (ckWARN(WARN_LAYER))
811 Perl_warner(aTHX_ packWARN(WARN_LAYER),
812 "perlio: invalid separator character %c%c%c in layer specification list %s",
814 SETERRNO(EINVAL, LIB$_INVARG);
819 } while (isALNUM(*e));
835 * It's a nul terminated string, not allowed
836 * to \ the terminating null. Anything other
837 * character is passed over.
847 if (ckWARN(WARN_LAYER))
848 Perl_warner(aTHX_ packWARN(WARN_LAYER),
849 "perlio: argument list not closed for layer \"%.*s\"",
861 bool warn_layer = ckWARN(WARN_LAYER);
862 PerlIO_funcs *layer =
863 PerlIO_find_layer(aTHX_ s, llen, 1);
865 PerlIO_list_push(aTHX_ av, layer,
872 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
885 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
887 PerlIO_funcs *tab = &PerlIO_perlio;
888 #ifdef PERLIO_USING_CRLF
891 if (PerlIO_stdio.Set_ptrcnt)
894 PerlIO_debug("Pushing %s\n", tab->name);
895 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
900 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
902 return av->array[n].arg;
906 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
908 if (n >= 0 && n < av->cur) {
909 PerlIO_debug("Layer %" IVdf " is %s\n", n,
910 av->array[n].funcs->name);
911 return av->array[n].funcs;
914 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
919 PerlIO_default_layers(pTHX)
921 if (!PL_def_layerlist) {
922 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
923 PerlIO_funcs *osLayer = &PerlIO_unix;
924 PL_def_layerlist = PerlIO_list_alloc(aTHX);
925 PerlIO_define_layer(aTHX_ & PerlIO_unix);
926 #if defined(WIN32) && !defined(UNDER_CE)
927 PerlIO_define_layer(aTHX_ & PerlIO_win32);
929 osLayer = &PerlIO_win32;
932 PerlIO_define_layer(aTHX_ & PerlIO_raw);
933 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
934 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
935 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
937 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
939 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
940 PerlIO_define_layer(aTHX_ & PerlIO_byte);
941 PerlIO_list_push(aTHX_ PL_def_layerlist,
942 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
945 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
948 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
951 if (PL_def_layerlist->cur < 2) {
952 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
954 return PL_def_layerlist;
958 Perl_boot_core_PerlIO(pTHX)
960 #ifdef USE_ATTRIBUTES_FOR_PERLIO
961 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
964 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
968 PerlIO_default_layer(pTHX_ I32 n)
970 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
973 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
976 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
977 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
980 PerlIO_stdstreams(pTHX)
983 PerlIO_allocate(aTHX);
984 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
985 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
986 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
991 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
993 if (tab->fsize != sizeof(PerlIO_funcs)) {
995 Perl_croak(aTHX_ "Layer does not match this perl");
999 if (tab->size < sizeof(PerlIOl)) {
1002 /* Real layer with a data area */
1003 Newc('L',l,tab->size,char,PerlIOl);
1005 Zero(l, tab->size, char);
1009 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1010 (mode) ? mode : "(Null)", (void*)arg);
1011 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1012 PerlIO_pop(aTHX_ f);
1018 /* Pseudo-layer where push does its own stack adjust */
1019 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1020 (mode) ? mode : "(Null)", (void*)arg);
1021 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1029 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1031 PerlIO_pop(aTHX_ f);
1034 PerlIO_pop(aTHX_ f);
1041 PerlIOBase_binmode(pTHX_ PerlIO *f)
1043 if (PerlIOValid(f)) {
1044 /* Is layer suitable for raw stream ? */
1045 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1046 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1047 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1050 /* Not suitable - pop it */
1051 PerlIO_pop(aTHX_ f);
1059 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1062 if (PerlIOValid(f)) {
1067 * Strip all layers that are not suitable for a raw stream
1070 while (t && (l = *t)) {
1071 if (l->tab->Binmode) {
1072 /* Has a handler - normal case */
1073 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1075 /* Layer still there - move down a layer */
1084 /* No handler - pop it */
1085 PerlIO_pop(aTHX_ t);
1088 if (PerlIOValid(f)) {
1089 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1097 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1098 PerlIO_list_t *layers, IV n, IV max)
1102 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1104 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1115 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1119 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1120 code = PerlIO_parse_layers(aTHX_ layers, names);
1122 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1124 PerlIO_list_free(aTHX_ layers);
1130 /*--------------------------------------------------------------------------------------*/
1132 * Given the abstraction above the public API functions
1136 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1138 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1139 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1140 (names) ? names : "(Null)");
1142 /* Do not flush etc. if (e.g.) switching encodings.
1143 if a pushed layer knows it needs to flush lower layers
1144 (for example :unix which is never going to call them)
1145 it can do the flush when it is pushed.
1147 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1150 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1151 #ifdef PERLIO_USING_CRLF
1152 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1153 O_BINARY so we can look for it in mode.
1155 if (!(mode & O_BINARY)) {
1157 /* FIXME?: Looking down the layer stack seems wrong,
1158 but is a way of reaching past (say) an encoding layer
1159 to flip CRLF-ness of the layer(s) below
1162 /* Perhaps we should turn on bottom-most aware layer
1163 e.g. Ilya's idea that UNIX TTY could serve
1165 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1166 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1167 /* Not in text mode - flush any pending stuff and flip it */
1169 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1171 /* Only need to turn it on in one layer so we are done */
1176 /* Not finding a CRLF aware layer presumably means we are binary
1177 which is not what was requested - so we failed
1178 We _could_ push :crlf layer but so could caller
1183 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1184 So code that used to be here is now in PerlIORaw_pushed().
1186 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1191 PerlIO__close(pTHX_ PerlIO *f)
1194 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1196 SETERRNO(EBADF, SS$_IVCHAN);
1202 Perl_PerlIO_close(pTHX_ PerlIO *f)
1205 if (PerlIOValid(f)) {
1206 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1208 PerlIO_pop(aTHX_ f);
1215 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1218 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1220 SETERRNO(EBADF, SS$_IVCHAN);
1226 PerlIO_context_layers(pTHX_ const char *mode)
1228 const char *type = NULL;
1230 * Need to supply default layer info from open.pm
1233 SV *layers = PL_curcop->cop_io;
1236 type = SvPV(layers, len);
1237 if (type && mode[0] != 'r') {
1239 * Skip to write part
1241 const char *s = strchr(type, 0);
1242 if (s && (STRLEN)(s - type) < len) {
1251 static PerlIO_funcs *
1252 PerlIO_layer_from_ref(pTHX_ SV *sv)
1255 * For any scalar type load the handler which is bundled with perl
1257 if (SvTYPE(sv) < SVt_PVAV)
1258 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1261 * For other types allow if layer is known but don't try and load it
1263 switch (SvTYPE(sv)) {
1265 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1267 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1269 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1271 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1277 PerlIO_resolve_layers(pTHX_ const char *layers,
1278 const char *mode, int narg, SV **args)
1280 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1283 PerlIO_stdstreams(aTHX);
1287 * If it is a reference but not an object see if we have a handler
1290 if (SvROK(arg) && !sv_isobject(arg)) {
1291 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1293 def = PerlIO_list_alloc(aTHX);
1294 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1298 * Don't fail if handler cannot be found :via(...) etc. may do
1299 * something sensible else we will just stringfy and open
1305 layers = PerlIO_context_layers(aTHX_ mode);
1306 if (layers && *layers) {
1310 av = PerlIO_list_alloc(aTHX);
1311 for (i = 0; i < def->cur; i++) {
1312 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1319 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1323 PerlIO_list_free(aTHX_ av);
1324 return (PerlIO_list_t *) NULL;
1335 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1336 int imode, int perm, PerlIO *f, int narg, SV **args)
1338 if (!f && narg == 1 && *args == &PL_sv_undef) {
1339 if ((f = PerlIO_tmpfile())) {
1341 layers = PerlIO_context_layers(aTHX_ mode);
1342 if (layers && *layers)
1343 PerlIO_apply_layers(aTHX_ f, mode, layers);
1347 PerlIO_list_t *layera = NULL;
1349 PerlIO_funcs *tab = NULL;
1350 if (PerlIOValid(f)) {
1352 * This is "reopen" - it is not tested as perl does not use it
1356 layera = PerlIO_list_alloc(aTHX);
1358 SV *arg = (l->tab->Getarg)
1359 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1361 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1362 l = *PerlIONext(&l);
1366 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1372 * Start at "top" of layer stack
1374 n = layera->cur - 1;
1376 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1385 * Found that layer 'n' can do opens - call it
1387 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1388 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1390 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1391 tab->name, layers, mode, fd, imode, perm,
1392 (void*)f, narg, (void*)args);
1393 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1396 if (n + 1 < layera->cur) {
1398 * More layers above the one that we used to open -
1401 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1402 /* If pushing layers fails close the file */
1409 PerlIO_list_free(aTHX_ layera);
1416 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1419 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1421 SETERRNO(EBADF, SS$_IVCHAN);
1427 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1430 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1432 SETERRNO(EBADF, SS$_IVCHAN);
1438 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1441 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1443 SETERRNO(EBADF, SS$_IVCHAN);
1449 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1452 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1454 SETERRNO(EBADF, SS$_IVCHAN);
1460 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1463 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1465 SETERRNO(EBADF, SS$_IVCHAN);
1471 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1475 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1476 if (tab && tab->Flush) {
1477 return (*tab->Flush) (aTHX_ f);
1480 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1481 SETERRNO(EBADF, SS$_IVCHAN);
1486 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1487 SETERRNO(EBADF, SS$_IVCHAN);
1493 * Is it good API design to do flush-all on NULL, a potentially
1494 * errorneous input? Maybe some magical value (PerlIO*
1495 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1496 * things on fflush(NULL), but should we be bound by their design
1499 PerlIO **table = &PL_perlio;
1501 while ((f = *table)) {
1503 table = (PerlIO **) (f++);
1504 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1505 if (*f && PerlIO_flush(f) != 0)
1515 PerlIOBase_flush_linebuf(pTHX)
1517 PerlIO **table = &PL_perlio;
1519 while ((f = *table)) {
1521 table = (PerlIO **) (f++);
1522 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1525 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1526 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1534 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1537 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1539 SETERRNO(EBADF, SS$_IVCHAN);
1545 PerlIO_isutf8(PerlIO *f)
1548 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1550 SETERRNO(EBADF, SS$_IVCHAN);
1556 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1559 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1561 SETERRNO(EBADF, SS$_IVCHAN);
1567 Perl_PerlIO_error(pTHX_ PerlIO *f)
1570 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1572 SETERRNO(EBADF, SS$_IVCHAN);
1578 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1581 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1583 SETERRNO(EBADF, SS$_IVCHAN);
1587 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1590 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1592 SETERRNO(EBADF, SS$_IVCHAN);
1596 PerlIO_has_base(PerlIO *f)
1598 if (PerlIOValid(f)) {
1599 return (PerlIOBase(f)->tab->Get_base != NULL);
1605 PerlIO_fast_gets(PerlIO *f)
1607 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1608 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1609 return (tab->Set_ptrcnt != NULL);
1615 PerlIO_has_cntptr(PerlIO *f)
1617 if (PerlIOValid(f)) {
1618 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1619 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1625 PerlIO_canset_cnt(PerlIO *f)
1627 if (PerlIOValid(f)) {
1628 PerlIOl *l = PerlIOBase(f);
1629 return (l->tab->Set_ptrcnt != NULL);
1635 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1638 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1643 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1646 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1651 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1653 if (PerlIOValid(f)) {
1654 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1655 if (tab->Get_ptr == NULL)
1657 return (*tab->Get_ptr) (aTHX_ f);
1663 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1665 if (PerlIOValid(f)) {
1666 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1667 if (tab->Get_cnt == NULL)
1669 return (*tab->Get_cnt) (aTHX_ f);
1675 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1677 if (PerlIOValid(f)) {
1678 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1683 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1685 if (PerlIOValid(f)) {
1686 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1687 if (tab->Set_ptrcnt == NULL) {
1688 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1690 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1694 /*--------------------------------------------------------------------------------------*/
1696 * utf8 and raw dummy layers
1700 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1702 if (PerlIOValid(f)) {
1703 if (tab->kind & PERLIO_K_UTF8)
1704 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1706 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1712 PerlIO_funcs PerlIO_utf8 = {
1713 sizeof(PerlIO_funcs),
1716 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1734 NULL, /* get_base */
1735 NULL, /* get_bufsiz */
1738 NULL, /* set_ptrcnt */
1741 PerlIO_funcs PerlIO_byte = {
1742 sizeof(PerlIO_funcs),
1763 NULL, /* get_base */
1764 NULL, /* get_bufsiz */
1767 NULL, /* set_ptrcnt */
1771 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1772 IV n, const char *mode, int fd, int imode, int perm,
1773 PerlIO *old, int narg, SV **args)
1775 PerlIO_funcs *tab = PerlIO_default_btm();
1776 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1780 PerlIO_funcs PerlIO_raw = {
1781 sizeof(PerlIO_funcs),
1802 NULL, /* get_base */
1803 NULL, /* get_bufsiz */
1806 NULL, /* set_ptrcnt */
1808 /*--------------------------------------------------------------------------------------*/
1809 /*--------------------------------------------------------------------------------------*/
1811 * "Methods" of the "base class"
1815 PerlIOBase_fileno(pTHX_ PerlIO *f)
1817 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1821 PerlIO_modestr(PerlIO * f, char *buf)
1824 if (PerlIOValid(f)) {
1825 IV flags = PerlIOBase(f)->flags;
1826 if (flags & PERLIO_F_APPEND) {
1828 if (flags & PERLIO_F_CANREAD) {
1832 else if (flags & PERLIO_F_CANREAD) {
1834 if (flags & PERLIO_F_CANWRITE)
1837 else if (flags & PERLIO_F_CANWRITE) {
1839 if (flags & PERLIO_F_CANREAD) {
1843 #ifdef PERLIO_USING_CRLF
1844 if (!(flags & PERLIO_F_CRLF))
1854 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1856 PerlIOl *l = PerlIOBase(f);
1858 const char *omode = mode;
1861 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1862 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1863 if (tab->Set_ptrcnt != NULL)
1864 l->flags |= PERLIO_F_FASTGETS;
1866 if (*mode == '#' || *mode == 'I')
1870 l->flags |= PERLIO_F_CANREAD;
1873 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1876 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1879 SETERRNO(EINVAL, LIB$_INVARG);
1885 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1888 l->flags &= ~PERLIO_F_CRLF;
1891 l->flags |= PERLIO_F_CRLF;
1894 SETERRNO(EINVAL, LIB$_INVARG);
1901 l->flags |= l->next->flags &
1902 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1907 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1908 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1909 l->flags, PerlIO_modestr(f, temp));
1915 PerlIOBase_popped(pTHX_ PerlIO *f)
1921 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1924 * Save the position as current head considers it
1926 Off_t old = PerlIO_tell(f);
1928 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1929 PerlIOSelf(f, PerlIOBuf)->posn = old;
1930 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1935 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1937 STDCHAR *buf = (STDCHAR *) vbuf;
1939 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1942 SSize_t avail = PerlIO_get_cnt(f);
1945 take = ((SSize_t)count < avail) ? count : avail;
1947 STDCHAR *ptr = PerlIO_get_ptr(f);
1948 Copy(ptr, buf, take, STDCHAR);
1949 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1953 if (count > 0 && avail <= 0) {
1954 if (PerlIO_fill(f) != 0)
1958 return (buf - (STDCHAR *) vbuf);
1964 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1970 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1976 PerlIOBase_close(pTHX_ PerlIO *f)
1979 PerlIO *n = PerlIONext(f);
1980 if (PerlIO_flush(f) != 0)
1982 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1984 PerlIOBase(f)->flags &=
1985 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1990 PerlIOBase_eof(pTHX_ PerlIO *f)
1992 if (PerlIOValid(f)) {
1993 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1999 PerlIOBase_error(pTHX_ PerlIO *f)
2001 if (PerlIOValid(f)) {
2002 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2008 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2010 if (PerlIOValid(f)) {
2011 PerlIO *n = PerlIONext(f);
2012 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2019 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2021 if (PerlIOValid(f)) {
2022 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2027 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2033 return sv_dup(arg, param);
2036 return newSVsv(arg);
2039 return newSVsv(arg);
2044 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2046 PerlIO *nexto = PerlIONext(o);
2047 if (PerlIOValid(nexto)) {
2048 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2049 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2052 PerlIO_funcs *self = PerlIOBase(o)->tab;
2055 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2056 self->name, (void*)f, (void*)o, (void*)param);
2058 arg = (*self->Getarg)(aTHX_ o,param,flags);
2060 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2068 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2070 perl_mutex PerlIO_mutex;
2072 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2077 /* Place holder for stdstreams call ??? */
2079 MUTEX_INIT(&PerlIO_mutex);
2084 PerlIOUnix_refcnt_inc(int fd)
2086 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2088 MUTEX_LOCK(&PerlIO_mutex);
2090 PerlIO_fd_refcnt[fd]++;
2091 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2093 MUTEX_UNLOCK(&PerlIO_mutex);
2099 PerlIOUnix_refcnt_dec(int fd)
2102 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2104 MUTEX_LOCK(&PerlIO_mutex);
2106 cnt = --PerlIO_fd_refcnt[fd];
2107 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2109 MUTEX_UNLOCK(&PerlIO_mutex);
2116 PerlIO_cleanup(pTHX)
2120 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2122 PerlIO_debug("Cleanup layers\n");
2124 /* Raise STDIN..STDERR refcount so we don't close them */
2125 for (i=0; i < 3; i++)
2126 PerlIOUnix_refcnt_inc(i);
2127 PerlIO_cleantable(aTHX_ &PL_perlio);
2128 /* Restore STDIN..STDERR refcount */
2129 for (i=0; i < 3; i++)
2130 PerlIOUnix_refcnt_dec(i);
2132 if (PL_known_layers) {
2133 PerlIO_list_free(aTHX_ PL_known_layers);
2134 PL_known_layers = NULL;
2136 if(PL_def_layerlist) {
2137 PerlIO_list_free(aTHX_ PL_def_layerlist);
2138 PL_def_layerlist = NULL;
2144 /*--------------------------------------------------------------------------------------*/
2146 * Bottom-most level for UNIX-like case
2150 struct _PerlIO base; /* The generic part */
2151 int fd; /* UNIX like file descriptor */
2152 int oflags; /* open/fcntl flags */
2156 PerlIOUnix_oflags(const char *mode)
2159 if (*mode == 'I' || *mode == '#')
2164 if (*++mode == '+') {
2171 oflags = O_CREAT | O_TRUNC;
2172 if (*++mode == '+') {
2181 oflags = O_CREAT | O_APPEND;
2182 if (*++mode == '+') {
2195 else if (*mode == 't') {
2197 oflags &= ~O_BINARY;
2201 * Always open in binary mode
2204 if (*mode || oflags == -1) {
2205 SETERRNO(EINVAL, LIB$_INVARG);
2212 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2214 return PerlIOSelf(f, PerlIOUnix)->fd;
2218 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2220 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2221 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2222 if (*PerlIONext(f)) {
2223 /* We never call down so do any pending stuff now */
2224 PerlIO_flush(PerlIONext(f));
2225 s->fd = PerlIO_fileno(PerlIONext(f));
2227 * XXX could (or should) we retrieve the oflags from the open file
2228 * handle rather than believing the "mode" we are passed in? XXX
2229 * Should the value on NULL mode be 0 or -1?
2231 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2233 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2238 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2239 IV n, const char *mode, int fd, int imode,
2240 int perm, PerlIO *f, int narg, SV **args)
2242 if (PerlIOValid(f)) {
2243 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2244 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2247 char *path = SvPV_nolen(*args);
2251 imode = PerlIOUnix_oflags(mode);
2255 fd = PerlLIO_open3(path, imode, perm);
2263 f = PerlIO_allocate(aTHX);
2265 if (!PerlIOValid(f)) {
2266 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2270 s = PerlIOSelf(f, PerlIOUnix);
2273 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2274 PerlIOUnix_refcnt_inc(fd);
2280 * FIXME: pop layers ???
2288 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2290 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2292 if (flags & PERLIO_DUP_FD) {
2293 fd = PerlLIO_dup(fd);
2295 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2296 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2298 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2299 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2301 PerlIOUnix_refcnt_inc(fd);
2310 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2312 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2313 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2314 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2318 SSize_t len = PerlLIO_read(fd, vbuf, count);
2319 if (len >= 0 || errno != EINTR) {
2321 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2322 else if (len == 0 && count != 0)
2323 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2331 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2333 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2335 SSize_t len = PerlLIO_write(fd, vbuf, count);
2336 if (len >= 0 || errno != EINTR) {
2338 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2346 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2349 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2350 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2351 return (new == (Off_t) - 1) ? -1 : 0;
2355 PerlIOUnix_tell(pTHX_ PerlIO *f)
2357 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2362 PerlIOUnix_close(pTHX_ PerlIO *f)
2364 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2366 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2367 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2368 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2373 SETERRNO(EBADF,SS$_IVCHAN);
2376 while (PerlLIO_close(fd) != 0) {
2377 if (errno != EINTR) {
2384 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2389 PerlIO_funcs PerlIO_unix = {
2390 sizeof(PerlIO_funcs),
2397 PerlIOBase_binmode, /* binmode */
2407 PerlIOBase_noop_ok, /* flush */
2408 PerlIOBase_noop_fail, /* fill */
2411 PerlIOBase_clearerr,
2412 PerlIOBase_setlinebuf,
2413 NULL, /* get_base */
2414 NULL, /* get_bufsiz */
2417 NULL, /* set_ptrcnt */
2420 /*--------------------------------------------------------------------------------------*/
2425 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2426 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2427 broken by the last second glibc 2.3 fix
2429 #define STDIO_BUFFER_WRITABLE
2434 struct _PerlIO base;
2435 FILE *stdio; /* The stream */
2439 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2442 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2443 return PerlSIO_fileno(s);
2450 PerlIOStdio_mode(const char *mode, char *tmode)
2456 #ifdef PERLIO_USING_CRLF
2464 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2467 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2468 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2469 if (toptab == tab) {
2470 /* Top is already stdio - pop self (duplicate) and use original */
2471 PerlIO_pop(aTHX_ f);
2474 int fd = PerlIO_fileno(n);
2477 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2478 mode = PerlIOStdio_mode(mode, tmode)))) {
2479 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2480 /* We never call down so do any pending stuff now */
2481 PerlIO_flush(PerlIONext(f));
2488 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2493 PerlIO_importFILE(FILE *stdio, const char *mode)
2499 if (!mode || !*mode) {
2500 /* We need to probe to see how we can open the stream
2501 so start with read/write and then try write and read
2502 we dup() so that we can fclose without loosing the fd.
2504 Note that the errno value set by a failing fdopen
2505 varies between stdio implementations.
2507 int fd = PerlLIO_dup(fileno(stdio));
2508 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2510 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2513 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2516 /* Don't seem to be able to open */
2522 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2523 s = PerlIOSelf(f, PerlIOStdio);
2531 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2532 IV n, const char *mode, int fd, int imode,
2533 int perm, PerlIO *f, int narg, SV **args)
2536 if (PerlIOValid(f)) {
2537 char *path = SvPV_nolen(*args);
2538 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2540 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2541 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2546 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2551 char *path = SvPV_nolen(*args);
2554 fd = PerlLIO_open3(path, imode, perm);
2557 FILE *stdio = PerlSIO_fopen(path, mode);
2561 f = PerlIO_allocate(aTHX);
2563 if ((f = PerlIO_push(aTHX_ f, self,
2564 (mode = PerlIOStdio_mode(mode, tmode)),
2566 s = PerlIOSelf(f, PerlIOStdio);
2568 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2587 stdio = PerlSIO_stdin;
2590 stdio = PerlSIO_stdout;
2593 stdio = PerlSIO_stderr;
2598 stdio = PerlSIO_fdopen(fd, mode =
2599 PerlIOStdio_mode(mode, tmode));
2604 f = PerlIO_allocate(aTHX);
2606 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2607 s = PerlIOSelf(f, PerlIOStdio);
2609 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2619 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2621 /* This assumes no layers underneath - which is what
2622 happens, but is not how I remember it. NI-S 2001/10/16
2624 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2625 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2626 if (flags & PERLIO_DUP_FD) {
2627 int fd = PerlLIO_dup(fileno(stdio));
2630 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2633 /* FIXME: To avoid messy error recovery if dup fails
2634 re-use the existing stdio as though flag was not set
2638 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2639 PerlIOUnix_refcnt_inc(fileno(stdio));
2645 PerlIOStdio_close(pTHX_ PerlIO *f)
2647 #ifdef SOCKS5_VERSION_NAME
2649 Sock_size_t optlen = sizeof(int);
2651 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2656 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2657 /* Do not close it but do flush any buffers */
2658 return PerlIO_flush(f);
2661 #ifdef SOCKS5_VERSION_NAME
2663 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2665 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2667 PerlSIO_fclose(stdio)
2676 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2678 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2681 STDCHAR *buf = (STDCHAR *) vbuf;
2683 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2684 * stdio does not do that for fread()
2686 int ch = PerlSIO_fgetc(s);
2693 got = PerlSIO_fread(vbuf, 1, count, s);
2698 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2701 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2703 #ifdef STDIO_BUFFER_WRITABLE
2704 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2705 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2706 STDCHAR *base = PerlIO_get_base(f);
2707 SSize_t cnt = PerlIO_get_cnt(f);
2708 STDCHAR *ptr = PerlIO_get_ptr(f);
2709 SSize_t avail = ptr - base;
2711 if (avail > count) {
2715 Move(buf-avail,ptr,avail,STDCHAR);
2718 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2719 if (PerlSIO_feof(s) && unread >= 0)
2720 PerlSIO_clearerr(s);
2725 if (PerlIO_has_cntptr(f)) {
2726 /* We can get pointer to buffer but not its base
2727 Do ungetc() but check chars are ending up in the
2730 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2731 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2733 int ch = *--buf & 0xFF;
2734 if (ungetc(ch,s) != ch) {
2735 /* ungetc did not work */
2738 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2739 /* Did not change pointer as expected */
2740 fgetc(s); /* get char back again */
2750 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2756 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2758 return PerlSIO_fwrite(vbuf, 1, count,
2759 PerlIOSelf(f, PerlIOStdio)->stdio);
2763 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2765 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2766 return PerlSIO_fseek(stdio, offset, whence);
2770 PerlIOStdio_tell(pTHX_ PerlIO *f)
2772 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2773 return PerlSIO_ftell(stdio);
2777 PerlIOStdio_flush(pTHX_ PerlIO *f)
2779 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2780 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2781 return PerlSIO_fflush(stdio);
2786 * FIXME: This discards ungetc() and pre-read stuff which is not
2787 * right if this is just a "sync" from a layer above Suspect right
2788 * design is to do _this_ but not have layer above flush this
2789 * layer read-to-read
2792 * Not writeable - sync by attempting a seek
2795 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2803 PerlIOStdio_eof(pTHX_ PerlIO *f)
2805 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2809 PerlIOStdio_error(pTHX_ PerlIO *f)
2811 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2815 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2817 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2821 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2823 #ifdef HAS_SETLINEBUF
2824 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2826 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2832 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2834 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2835 return (STDCHAR*)PerlSIO_get_base(stdio);
2839 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2841 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2842 return PerlSIO_get_bufsiz(stdio);
2846 #ifdef USE_STDIO_PTR
2848 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2850 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2851 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2855 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2857 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2858 return PerlSIO_get_cnt(stdio);
2862 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2864 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2866 #ifdef STDIO_PTR_LVALUE
2867 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2868 #ifdef STDIO_PTR_LVAL_SETS_CNT
2869 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2870 assert(PerlSIO_get_cnt(stdio) == (cnt));
2873 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2875 * Setting ptr _does_ change cnt - we are done
2879 #else /* STDIO_PTR_LVALUE */
2881 #endif /* STDIO_PTR_LVALUE */
2884 * Now (or only) set cnt
2886 #ifdef STDIO_CNT_LVALUE
2887 PerlSIO_set_cnt(stdio, cnt);
2888 #else /* STDIO_CNT_LVALUE */
2889 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2890 PerlSIO_set_ptr(stdio,
2891 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2893 #else /* STDIO_PTR_LVAL_SETS_CNT */
2895 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2896 #endif /* STDIO_CNT_LVALUE */
2903 PerlIOStdio_fill(pTHX_ PerlIO *f)
2905 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2908 * fflush()ing read-only streams can cause trouble on some stdio-s
2910 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2911 if (PerlSIO_fflush(stdio) != 0)
2914 c = PerlSIO_fgetc(stdio);
2918 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2920 #ifdef STDIO_BUFFER_WRITABLE
2921 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2922 /* Fake ungetc() to the real buffer in case system's ungetc
2925 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2926 SSize_t cnt = PerlSIO_get_cnt(stdio);
2927 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2928 if (ptr == base+1) {
2929 *--ptr = (STDCHAR) c;
2930 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2931 if (PerlSIO_feof(stdio))
2932 PerlSIO_clearerr(stdio);
2938 if (PerlIO_has_cntptr(f)) {
2940 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2947 /* An ungetc()d char is handled separately from the regular
2948 * buffer, so we stuff it in the buffer ourselves.
2949 * Should never get called as should hit code above
2951 *(--((*stdio)->_ptr)) = (unsigned char) c;
2954 /* If buffer snoop scheme above fails fall back to
2957 if (PerlSIO_ungetc(c, stdio) != c)
2965 PerlIO_funcs PerlIO_stdio = {
2966 sizeof(PerlIO_funcs),
2968 sizeof(PerlIOStdio),
2969 PERLIO_K_BUFFERED|PERLIO_K_RAW,
2973 PerlIOBase_binmode, /* binmode */
2987 PerlIOStdio_clearerr,
2988 PerlIOStdio_setlinebuf,
2990 PerlIOStdio_get_base,
2991 PerlIOStdio_get_bufsiz,
2996 #ifdef USE_STDIO_PTR
2997 PerlIOStdio_get_ptr,
2998 PerlIOStdio_get_cnt,
2999 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3000 PerlIOStdio_set_ptrcnt
3001 #else /* STDIO_PTR_LVALUE */
3003 #endif /* STDIO_PTR_LVALUE */
3004 #else /* USE_STDIO_PTR */
3008 #endif /* USE_STDIO_PTR */
3012 PerlIO_exportFILE(PerlIO * f, const char *mode)
3016 if (PerlIOValid(f)) {
3019 if (!mode || !*mode) {
3020 mode = PerlIO_modestr(f, buf);
3022 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3025 /* De-link any lower layers so new :stdio sticks */
3027 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3028 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3030 /* Link previous lower layers under new one */
3034 /* restore layers list */
3044 PerlIO_findFILE(PerlIO *f)
3048 if (l->tab == &PerlIO_stdio) {
3049 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3052 l = *PerlIONext(&l);
3054 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3055 return PerlIO_exportFILE(f, Nullch);
3059 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3063 if (l->tab == &PerlIO_stdio) {
3064 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3065 if (s->stdio == f) {
3067 PerlIO_pop(aTHX_ p);
3076 /*--------------------------------------------------------------------------------------*/
3078 * perlio buffer layer
3082 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3084 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3085 int fd = PerlIO_fileno(f);
3086 if (fd >= 0 && PerlLIO_isatty(fd)) {
3087 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3089 if (*PerlIONext(f)) {
3090 Off_t posn = PerlIO_tell(PerlIONext(f));
3091 if (posn != (Off_t) - 1) {
3095 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3099 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3100 IV n, const char *mode, int fd, int imode, int perm,
3101 PerlIO *f, int narg, SV **args)
3103 if (PerlIOValid(f)) {
3104 PerlIO *next = PerlIONext(f);
3105 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3106 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3108 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3113 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3121 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3124 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3126 * if push fails during open, open fails. close will pop us.
3131 fd = PerlIO_fileno(f);
3132 if (init && fd == 2) {
3134 * Initial stderr is unbuffered
3136 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3138 #ifdef PERLIO_USING_CRLF
3139 # ifdef PERLIO_IS_BINMODE_FD
3140 if (PERLIO_IS_BINMODE_FD(fd))
3141 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3145 * do something about failing setmode()? --jhi
3147 PerlLIO_setmode(fd, O_BINARY);
3156 * This "flush" is akin to sfio's sync in that it handles files in either
3157 * read or write state
3160 PerlIOBuf_flush(pTHX_ PerlIO *f)
3162 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3164 PerlIO *n = PerlIONext(f);
3165 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3167 * write() the buffer
3169 STDCHAR *buf = b->buf;
3171 while (p < b->ptr) {
3172 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3176 else if (count < 0 || PerlIO_error(n)) {
3177 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3182 b->posn += (p - buf);
3184 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3185 STDCHAR *buf = PerlIO_get_base(f);
3187 * Note position change
3189 b->posn += (b->ptr - buf);
3190 if (b->ptr < b->end) {
3191 /* We did not consume all of it - try and seek downstream to
3192 our logical position
3194 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3195 /* Reload n as some layers may pop themselves on seek */
3196 b->posn = PerlIO_tell(n = PerlIONext(f));
3199 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3200 data is lost for good - so return saying "ok" having undone
3203 b->posn -= (b->ptr - buf);
3208 b->ptr = b->end = b->buf;
3209 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3210 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3211 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3217 PerlIOBuf_fill(pTHX_ PerlIO *f)
3219 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3220 PerlIO *n = PerlIONext(f);
3223 * Down-stream flush is defined not to loose read data so is harmless.
3224 * we would not normally be fill'ing if there was data left in anycase.
3226 if (PerlIO_flush(f) != 0)
3228 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3229 PerlIOBase_flush_linebuf(aTHX);
3232 PerlIO_get_base(f); /* allocate via vtable */
3234 b->ptr = b->end = b->buf;
3236 if (!PerlIOValid(n)) {
3237 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3241 if (PerlIO_fast_gets(n)) {
3243 * Layer below is also buffered. We do _NOT_ want to call its
3244 * ->Read() because that will loop till it gets what we asked for
3245 * which may hang on a pipe etc. Instead take anything it has to
3246 * hand, or ask it to fill _once_.
3248 avail = PerlIO_get_cnt(n);
3250 avail = PerlIO_fill(n);
3252 avail = PerlIO_get_cnt(n);
3254 if (!PerlIO_error(n) && PerlIO_eof(n))
3259 STDCHAR *ptr = PerlIO_get_ptr(n);
3260 SSize_t cnt = avail;
3261 if (avail > (SSize_t)b->bufsiz)
3263 Copy(ptr, b->buf, avail, STDCHAR);
3264 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3268 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3272 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3274 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3277 b->end = b->buf + avail;
3278 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3283 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3285 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3286 if (PerlIOValid(f)) {
3289 return PerlIOBase_read(aTHX_ f, vbuf, count);
3295 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3297 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3298 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3301 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3306 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3308 * Buffer is already a read buffer, we can overwrite any chars
3309 * which have been read back to buffer start
3311 avail = (b->ptr - b->buf);
3315 * Buffer is idle, set it up so whole buffer is available for
3319 b->end = b->buf + avail;
3321 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3323 * Buffer extends _back_ from where we are now
3325 b->posn -= b->bufsiz;
3327 if (avail > (SSize_t) count) {
3329 * If we have space for more than count, just move count
3337 * In simple stdio-like ungetc() case chars will be already
3340 if (buf != b->ptr) {
3341 Copy(buf, b->ptr, avail, STDCHAR);
3345 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3349 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3355 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3357 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3358 const STDCHAR *buf = (const STDCHAR *) vbuf;
3362 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3365 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3366 if ((SSize_t) count < avail)
3368 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3369 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3384 Copy(buf, b->ptr, avail, STDCHAR);
3391 if (b->ptr >= (b->buf + b->bufsiz))
3394 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3400 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3403 if ((code = PerlIO_flush(f)) == 0) {
3404 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3405 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3406 code = PerlIO_seek(PerlIONext(f), offset, whence);
3408 b->posn = PerlIO_tell(PerlIONext(f));
3415 PerlIOBuf_tell(pTHX_ PerlIO *f)
3417 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3419 * b->posn is file position where b->buf was read, or will be written
3421 Off_t posn = b->posn;
3424 * If buffer is valid adjust position by amount in buffer
3426 posn += (b->ptr - b->buf);
3432 PerlIOBuf_popped(pTHX_ PerlIO *f)
3434 IV code = PerlIOBase_popped(aTHX_ f);
3435 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3436 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3440 b->ptr = b->end = b->buf;
3441 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3446 PerlIOBuf_close(pTHX_ PerlIO *f)
3448 IV code = PerlIOBase_close(aTHX_ f);
3449 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3450 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3454 b->ptr = b->end = b->buf;
3455 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3460 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3462 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3469 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3471 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3474 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3475 return (b->end - b->ptr);
3480 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3482 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3487 Newz('B',b->buf,b->bufsiz, STDCHAR);
3489 b->buf = (STDCHAR *) & b->oneword;
3490 b->bufsiz = sizeof(b->oneword);
3499 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3501 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3504 return (b->end - b->buf);
3508 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3510 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3514 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3515 assert(PerlIO_get_cnt(f) == cnt);
3516 assert(b->ptr >= b->buf);
3518 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3522 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3524 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3529 PerlIO_funcs PerlIO_perlio = {
3530 sizeof(PerlIO_funcs),
3533 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3537 PerlIOBase_binmode, /* binmode */
3551 PerlIOBase_clearerr,
3552 PerlIOBase_setlinebuf,
3557 PerlIOBuf_set_ptrcnt,
3560 /*--------------------------------------------------------------------------------------*/
3562 * Temp layer to hold unread chars when cannot do it any other way
3566 PerlIOPending_fill(pTHX_ PerlIO *f)
3569 * Should never happen
3576 PerlIOPending_close(pTHX_ PerlIO *f)
3579 * A tad tricky - flush pops us, then we close new top
3582 return PerlIO_close(f);
3586 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3589 * A tad tricky - flush pops us, then we seek new top
3592 return PerlIO_seek(f, offset, whence);
3597 PerlIOPending_flush(pTHX_ PerlIO *f)
3599 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3600 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3604 PerlIO_pop(aTHX_ f);
3609 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3615 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3620 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3622 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3623 PerlIOl *l = PerlIOBase(f);
3625 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3626 * etc. get muddled when it changes mid-string when we auto-pop.
3628 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3629 (PerlIOBase(PerlIONext(f))->
3630 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3635 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3637 SSize_t avail = PerlIO_get_cnt(f);
3639 if ((SSize_t)count < avail)
3642 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3643 if (got >= 0 && got < (SSize_t)count) {
3645 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3646 if (more >= 0 || got == 0)
3652 PerlIO_funcs PerlIO_pending = {
3653 sizeof(PerlIO_funcs),
3656 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3657 PerlIOPending_pushed,
3660 PerlIOBase_binmode, /* binmode */
3669 PerlIOPending_close,
3670 PerlIOPending_flush,
3674 PerlIOBase_clearerr,
3675 PerlIOBase_setlinebuf,
3680 PerlIOPending_set_ptrcnt,
3685 /*--------------------------------------------------------------------------------------*/
3687 * crlf - translation On read translate CR,LF to "\n" we do this by
3688 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3689 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3693 PerlIOBuf base; /* PerlIOBuf stuff */
3694 STDCHAR *nl; /* Position of crlf we "lied" about in the
3699 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3702 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3703 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3705 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3706 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3707 PerlIOBase(f)->flags);
3714 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3716 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3721 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3722 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3724 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3725 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3727 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3732 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3733 b->end = b->ptr = b->buf + b->bufsiz;
3734 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3735 b->posn -= b->bufsiz;
3737 while (count > 0 && b->ptr > b->buf) {
3740 if (b->ptr - 2 >= b->buf) {
3763 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3765 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3768 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3769 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3770 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3771 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3773 while (nl < b->end && *nl != 0xd)
3775 if (nl < b->end && *nl == 0xd) {
3777 if (nl + 1 < b->end) {
3784 * Not CR,LF but just CR
3792 * Blast - found CR as last char in buffer
3797 * They may not care, defer work as long as
3801 return (nl - b->ptr);
3805 b->ptr++; /* say we have read it as far as
3806 * flush() is concerned */
3807 b->buf++; /* Leave space in front of buffer */
3808 b->bufsiz--; /* Buffer is thus smaller */
3809 code = PerlIO_fill(f); /* Fetch some more */
3810 b->bufsiz++; /* Restore size for next time */
3811 b->buf--; /* Point at space */
3812 b->ptr = nl = b->buf; /* Which is what we hand
3814 b->posn--; /* Buffer starts here */
3815 *nl = 0xd; /* Fill in the CR */
3817 goto test; /* fill() call worked */
3819 * CR at EOF - just fall through
3821 /* Should we clear EOF though ??? */
3826 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3832 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3834 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3835 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3841 if (ptr == b->end && *c->nl == 0xd) {
3842 /* Defered CR at end of buffer case - we lied about count */
3854 * Test code - delete when it works ...
3856 IV flags = PerlIOBase(f)->flags;
3857 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3858 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3859 /* Defered CR at end of buffer case - we lied about count */
3865 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3866 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3874 * They have taken what we lied about
3882 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3886 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3888 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3889 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3891 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3892 const STDCHAR *buf = (const STDCHAR *) vbuf;
3893 const STDCHAR *ebuf = buf + count;
3896 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3898 while (buf < ebuf) {
3899 STDCHAR *eptr = b->buf + b->bufsiz;
3900 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3901 while (buf < ebuf && b->ptr < eptr) {
3903 if ((b->ptr + 2) > eptr) {
3911 *(b->ptr)++ = 0xd; /* CR */
3912 *(b->ptr)++ = 0xa; /* LF */
3914 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3924 if (b->ptr >= eptr) {
3930 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3932 return (buf - (STDCHAR *) vbuf);
3937 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3939 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3944 return PerlIOBuf_flush(aTHX_ f);
3948 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3950 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3951 /* In text mode - flush any pending stuff and flip it */
3952 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3953 #ifndef PERLIO_USING_CRLF
3954 /* CRLF is unusual case - if this is just the :crlf layer pop it */
3955 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
3956 PerlIO_pop(aTHX_ f);
3963 PerlIO_funcs PerlIO_crlf = {
3964 sizeof(PerlIO_funcs),
3967 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
3969 PerlIOBuf_popped, /* popped */
3971 PerlIOCrlf_binmode, /* binmode */
3975 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3977 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3978 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3986 PerlIOBase_clearerr,
3987 PerlIOBase_setlinebuf,
3992 PerlIOCrlf_set_ptrcnt,
3996 /*--------------------------------------------------------------------------------------*/
3998 * mmap as "buffer" layer
4002 PerlIOBuf base; /* PerlIOBuf stuff */
4003 Mmap_t mptr; /* Mapped address */
4004 Size_t len; /* mapped length */
4005 STDCHAR *bbuf; /* malloced buffer if map fails */
4008 static size_t page_size = 0;
4011 PerlIOMmap_map(pTHX_ PerlIO *f)
4013 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4014 IV flags = PerlIOBase(f)->flags;
4018 if (flags & PERLIO_F_CANREAD) {
4019 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4020 int fd = PerlIO_fileno(f);
4022 code = Fstat(fd, &st);
4023 if (code == 0 && S_ISREG(st.st_mode)) {
4024 SSize_t len = st.st_size - b->posn;
4028 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4030 SETERRNO(0, SS$_NORMAL);
4031 # ifdef _SC_PAGESIZE
4032 page_size = sysconf(_SC_PAGESIZE);
4034 page_size = sysconf(_SC_PAGE_SIZE);
4036 if ((long) page_size < 0) {
4041 (void) SvUPGRADE(error, SVt_PV);
4042 msg = SvPVx(error, n_a);
4043 Perl_croak(aTHX_ "panic: sysconf: %s",
4048 "panic: sysconf: pagesize unknown");
4052 # ifdef HAS_GETPAGESIZE
4053 page_size = getpagesize();
4055 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4056 page_size = PAGESIZE; /* compiletime, bad */
4060 if ((IV) page_size <= 0)
4061 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4066 * This is a hack - should never happen - open should
4069 b->posn = PerlIO_tell(PerlIONext(f));
4071 posn = (b->posn / page_size) * page_size;
4072 len = st.st_size - posn;
4073 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4074 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4075 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4076 madvise(m->mptr, len, MADV_SEQUENTIAL);
4078 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4079 madvise(m->mptr, len, MADV_WILLNEED);
4081 PerlIOBase(f)->flags =
4082 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4083 b->end = ((STDCHAR *) m->mptr) + len;
4084 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4093 PerlIOBase(f)->flags =
4094 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4096 b->ptr = b->end = b->ptr;
4105 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4107 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4108 PerlIOBuf *b = &m->base;
4112 code = munmap(m->mptr, m->len);
4116 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4119 b->ptr = b->end = b->buf;
4120 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4126 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4128 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4129 PerlIOBuf *b = &m->base;
4130 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4132 * Already have a readbuffer in progress
4138 * We have a write buffer or flushed PerlIOBuf read buffer
4140 m->bbuf = b->buf; /* save it in case we need it again */
4141 b->buf = NULL; /* Clear to trigger below */
4144 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4147 * Map did not work - recover PerlIOBuf buffer if we have one
4152 b->ptr = b->end = b->buf;
4155 return PerlIOBuf_get_base(aTHX_ f);
4159 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4161 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4162 PerlIOBuf *b = &m->base;
4163 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4165 if (b->ptr && (b->ptr - count) >= b->buf
4166 && memEQ(b->ptr - count, vbuf, count)) {
4168 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4173 * Loose the unwritable mapped buffer
4177 * If flush took the "buffer" see if we have one from before
4179 if (!b->buf && m->bbuf)
4182 PerlIOBuf_get_base(aTHX_ f);
4186 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4190 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4192 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4193 PerlIOBuf *b = &m->base;
4194 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4196 * No, or wrong sort of, buffer
4199 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4203 * If unmap took the "buffer" see if we have one from before
4205 if (!b->buf && m->bbuf)
4208 PerlIOBuf_get_base(aTHX_ f);
4212 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4216 PerlIOMmap_flush(pTHX_ PerlIO *f)
4218 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4219 PerlIOBuf *b = &m->base;
4220 IV code = PerlIOBuf_flush(aTHX_ f);
4222 * Now we are "synced" at PerlIOBuf level
4229 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4234 * We seem to have a PerlIOBuf buffer which was not mapped
4235 * remember it in case we need one later
4244 PerlIOMmap_fill(pTHX_ PerlIO *f)
4246 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4247 IV code = PerlIO_flush(f);
4248 if (code == 0 && !b->buf) {
4249 code = PerlIOMmap_map(aTHX_ f);
4251 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4252 code = PerlIOBuf_fill(aTHX_ f);
4258 PerlIOMmap_close(pTHX_ PerlIO *f)
4260 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4261 PerlIOBuf *b = &m->base;
4262 IV code = PerlIO_flush(f);
4266 b->ptr = b->end = b->buf;
4268 if (PerlIOBuf_close(aTHX_ f) != 0)
4274 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4276 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4280 PerlIO_funcs PerlIO_mmap = {
4281 sizeof(PerlIO_funcs),
4284 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4288 PerlIOBase_binmode, /* binmode */
4302 PerlIOBase_clearerr,
4303 PerlIOBase_setlinebuf,
4304 PerlIOMmap_get_base,
4308 PerlIOBuf_set_ptrcnt,
4311 #endif /* HAS_MMAP */
4314 Perl_PerlIO_stdin(pTHX)
4317 PerlIO_stdstreams(aTHX);
4319 return &PL_perlio[1];
4323 Perl_PerlIO_stdout(pTHX)
4326 PerlIO_stdstreams(aTHX);
4328 return &PL_perlio[2];
4332 Perl_PerlIO_stderr(pTHX)
4335 PerlIO_stdstreams(aTHX);
4337 return &PL_perlio[3];
4340 /*--------------------------------------------------------------------------------------*/
4343 PerlIO_getname(PerlIO *f, char *buf)
4348 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4350 name = fgetname(stdio, buf);
4352 Perl_croak(aTHX_ "Don't know how to get file name");
4358 /*--------------------------------------------------------------------------------------*/
4360 * Functions which can be called on any kind of PerlIO implemented in
4364 #undef PerlIO_fdopen
4366 PerlIO_fdopen(int fd, const char *mode)
4369 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4374 PerlIO_open(const char *path, const char *mode)
4377 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4378 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4381 #undef Perlio_reopen
4383 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4386 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4387 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4392 PerlIO_getc(PerlIO *f)
4396 SSize_t count = PerlIO_read(f, buf, 1);
4398 return (unsigned char) buf[0];
4403 #undef PerlIO_ungetc
4405 PerlIO_ungetc(PerlIO *f, int ch)
4410 if (PerlIO_unread(f, &buf, 1) == 1)
4418 PerlIO_putc(PerlIO *f, int ch)
4422 return PerlIO_write(f, &buf, 1);
4427 PerlIO_puts(PerlIO *f, const char *s)
4430 STRLEN len = strlen(s);
4431 return PerlIO_write(f, s, len);
4434 #undef PerlIO_rewind
4436 PerlIO_rewind(PerlIO *f)
4439 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4443 #undef PerlIO_vprintf
4445 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4448 SV *sv = newSVpvn("", 0);
4454 Perl_va_copy(ap, apc);
4455 sv_vcatpvf(sv, fmt, &apc);
4457 sv_vcatpvf(sv, fmt, &ap);
4460 wrote = PerlIO_write(f, s, len);
4465 #undef PerlIO_printf
4467 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4472 result = PerlIO_vprintf(f, fmt, ap);
4477 #undef PerlIO_stdoutf
4479 PerlIO_stdoutf(const char *fmt, ...)
4485 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4490 #undef PerlIO_tmpfile
4492 PerlIO_tmpfile(void)
4495 * I have no idea how portable mkstemp() is ...
4497 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4500 FILE *stdio = PerlSIO_tmpfile();
4502 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4503 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4510 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4511 int fd = mkstemp(SvPVX(sv));
4514 f = PerlIO_fdopen(fd, "w+");
4516 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4518 PerlLIO_unlink(SvPVX(sv));
4528 #endif /* USE_SFIO */
4529 #endif /* PERLIO_IS_STDIO */
4531 /*======================================================================================*/
4533 * Now some functions in terms of above which may be needed even if we are
4534 * not in true PerlIO mode
4538 #undef PerlIO_setpos
4540 PerlIO_setpos(PerlIO *f, SV *pos)
4545 Off_t *posn = (Off_t *) SvPV(pos, len);
4546 if (f && len == sizeof(Off_t))
4547 return PerlIO_seek(f, *posn, SEEK_SET);
4549 SETERRNO(EINVAL, SS$_IVCHAN);
4553 #undef PerlIO_setpos
4555 PerlIO_setpos(PerlIO *f, SV *pos)
4560 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4561 if (f && len == sizeof(Fpos_t)) {
4562 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4563 return fsetpos64(f, fpos);
4565 return fsetpos(f, fpos);
4569 SETERRNO(EINVAL, SS$_IVCHAN);
4575 #undef PerlIO_getpos
4577 PerlIO_getpos(PerlIO *f, SV *pos)
4580 Off_t posn = PerlIO_tell(f);
4581 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4582 return (posn == (Off_t) - 1) ? -1 : 0;
4585 #undef PerlIO_getpos
4587 PerlIO_getpos(PerlIO *f, SV *pos)
4592 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4593 code = fgetpos64(f, &fpos);
4595 code = fgetpos(f, &fpos);
4597 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4602 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4605 vprintf(char *pat, char *args)
4607 _doprnt(pat, args, stdout);
4608 return 0; /* wrong, but perl doesn't use the return
4613 vfprintf(FILE *fd, char *pat, char *args)
4615 _doprnt(pat, args, fd);
4616 return 0; /* wrong, but perl doesn't use the return
4622 #ifndef PerlIO_vsprintf
4624 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4626 int val = vsprintf(s, fmt, ap);
4628 if (strlen(s) >= (STRLEN) n) {
4630 (void) PerlIO_puts(Perl_error_log,
4631 "panic: sprintf overflow - memory corrupted!\n");
4639 #ifndef PerlIO_sprintf
4641 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4646 result = PerlIO_vsprintf(s, n, fmt, ap);