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 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
921 if (PerlIOValid(f)) {
929 PerlIO_funcs PerlIO_remove = {
930 sizeof(PerlIO_funcs),
933 PERLIO_K_DUMMY | PERLIO_K_UTF8,
952 NULL, /* get_bufsiz */
955 NULL, /* set_ptrcnt */
959 PerlIO_default_layers(pTHX)
961 if (!PL_def_layerlist) {
962 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
963 PerlIO_funcs *osLayer = &PerlIO_unix;
964 PL_def_layerlist = PerlIO_list_alloc(aTHX);
965 PerlIO_define_layer(aTHX_ & PerlIO_unix);
966 #if defined(WIN32) && !defined(UNDER_CE)
967 PerlIO_define_layer(aTHX_ & PerlIO_win32);
969 osLayer = &PerlIO_win32;
972 PerlIO_define_layer(aTHX_ & PerlIO_raw);
973 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
974 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
975 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
977 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
979 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
980 PerlIO_define_layer(aTHX_ & PerlIO_remove);
981 PerlIO_define_layer(aTHX_ & PerlIO_byte);
982 PerlIO_list_push(aTHX_ PL_def_layerlist,
983 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
986 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
989 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
992 if (PL_def_layerlist->cur < 2) {
993 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
995 return PL_def_layerlist;
999 Perl_boot_core_PerlIO(pTHX)
1001 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1002 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1005 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1009 PerlIO_default_layer(pTHX_ I32 n)
1011 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1014 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1017 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1018 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1021 PerlIO_stdstreams(pTHX)
1024 PerlIO_allocate(aTHX);
1025 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1026 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1027 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1032 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1034 if (tab->fsize != sizeof(PerlIO_funcs)) {
1036 Perl_croak(aTHX_ "Layer does not match this perl");
1040 if (tab->size < sizeof(PerlIOl)) {
1043 /* Real layer with a data area */
1044 Newc('L',l,tab->size,char,PerlIOl);
1046 Zero(l, tab->size, char);
1050 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1051 (mode) ? mode : "(Null)", (void*)arg);
1052 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1053 PerlIO_pop(aTHX_ f);
1059 /* Pseudo-layer where push does its own stack adjust */
1060 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1061 (mode) ? mode : "(Null)", (void*)arg);
1062 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1070 PerlIOBase_binmode(pTHX_ PerlIO *f)
1072 if (PerlIOValid(f)) {
1073 /* Is layer suitable for raw stream ? */
1074 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1075 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1076 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1079 /* Not suitable - pop it */
1080 PerlIO_pop(aTHX_ f);
1088 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1091 if (PerlIOValid(f)) {
1096 * Strip all layers that are not suitable for a raw stream
1099 while (t && (l = *t)) {
1100 if (l->tab->Binmode) {
1101 /* Has a handler - normal case */
1102 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1104 /* Layer still there - move down a layer */
1113 /* No handler - pop it */
1114 PerlIO_pop(aTHX_ t);
1117 if (PerlIOValid(f)) {
1118 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1126 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1127 PerlIO_list_t *layers, IV n, IV max)
1131 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1133 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1144 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1148 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1149 code = PerlIO_parse_layers(aTHX_ layers, names);
1151 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1153 PerlIO_list_free(aTHX_ layers);
1159 /*--------------------------------------------------------------------------------------*/
1161 * Given the abstraction above the public API functions
1165 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1167 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1168 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1169 (names) ? names : "(Null)");
1171 /* Do not flush etc. if (e.g.) switching encodings.
1172 if a pushed layer knows it needs to flush lower layers
1173 (for example :unix which is never going to call them)
1174 it can do the flush when it is pushed.
1176 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1179 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1180 #ifdef PERLIO_USING_CRLF
1181 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1182 O_BINARY so we can look for it in mode.
1184 if (!(mode & O_BINARY)) {
1186 /* FIXME?: Looking down the layer stack seems wrong,
1187 but is a way of reaching past (say) an encoding layer
1188 to flip CRLF-ness of the layer(s) below
1191 /* Perhaps we should turn on bottom-most aware layer
1192 e.g. Ilya's idea that UNIX TTY could serve
1194 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1195 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1196 /* Not in text mode - flush any pending stuff and flip it */
1198 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1200 /* Only need to turn it on in one layer so we are done */
1205 /* Not finding a CRLF aware layer presumably means we are binary
1206 which is not what was requested - so we failed
1207 We _could_ push :crlf layer but so could caller
1212 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1213 So code that used to be here is now in PerlIORaw_pushed().
1215 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1220 PerlIO__close(pTHX_ PerlIO *f)
1223 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1225 SETERRNO(EBADF, SS$_IVCHAN);
1231 Perl_PerlIO_close(pTHX_ PerlIO *f)
1234 if (PerlIOValid(f)) {
1235 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1237 PerlIO_pop(aTHX_ f);
1244 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1247 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1249 SETERRNO(EBADF, SS$_IVCHAN);
1255 PerlIO_context_layers(pTHX_ const char *mode)
1257 const char *type = NULL;
1259 * Need to supply default layer info from open.pm
1262 SV *layers = PL_curcop->cop_io;
1265 type = SvPV(layers, len);
1266 if (type && mode[0] != 'r') {
1268 * Skip to write part
1270 const char *s = strchr(type, 0);
1271 if (s && (STRLEN)(s - type) < len) {
1280 static PerlIO_funcs *
1281 PerlIO_layer_from_ref(pTHX_ SV *sv)
1284 * For any scalar type load the handler which is bundled with perl
1286 if (SvTYPE(sv) < SVt_PVAV)
1287 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1290 * For other types allow if layer is known but don't try and load it
1292 switch (SvTYPE(sv)) {
1294 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1296 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1298 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1300 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1306 PerlIO_resolve_layers(pTHX_ const char *layers,
1307 const char *mode, int narg, SV **args)
1309 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1312 PerlIO_stdstreams(aTHX);
1316 * If it is a reference but not an object see if we have a handler
1319 if (SvROK(arg) && !sv_isobject(arg)) {
1320 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1322 def = PerlIO_list_alloc(aTHX);
1323 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1327 * Don't fail if handler cannot be found :via(...) etc. may do
1328 * something sensible else we will just stringfy and open
1334 layers = PerlIO_context_layers(aTHX_ mode);
1335 if (layers && *layers) {
1339 av = PerlIO_list_alloc(aTHX);
1340 for (i = 0; i < def->cur; i++) {
1341 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1348 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1352 PerlIO_list_free(aTHX_ av);
1353 return (PerlIO_list_t *) NULL;
1364 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1365 int imode, int perm, PerlIO *f, int narg, SV **args)
1367 if (!f && narg == 1 && *args == &PL_sv_undef) {
1368 if ((f = PerlIO_tmpfile())) {
1370 layers = PerlIO_context_layers(aTHX_ mode);
1371 if (layers && *layers)
1372 PerlIO_apply_layers(aTHX_ f, mode, layers);
1376 PerlIO_list_t *layera = NULL;
1378 PerlIO_funcs *tab = NULL;
1379 if (PerlIOValid(f)) {
1381 * This is "reopen" - it is not tested as perl does not use it
1385 layera = PerlIO_list_alloc(aTHX);
1387 SV *arg = (l->tab->Getarg)
1388 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1390 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1391 l = *PerlIONext(&l);
1395 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1401 * Start at "top" of layer stack
1403 n = layera->cur - 1;
1405 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1414 * Found that layer 'n' can do opens - call it
1416 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1417 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1419 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1420 tab->name, layers, mode, fd, imode, perm,
1421 (void*)f, narg, (void*)args);
1422 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1425 if (n + 1 < layera->cur) {
1427 * More layers above the one that we used to open -
1430 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1431 /* If pushing layers fails close the file */
1438 PerlIO_list_free(aTHX_ layera);
1445 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1448 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1450 SETERRNO(EBADF, SS$_IVCHAN);
1456 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1459 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1461 SETERRNO(EBADF, SS$_IVCHAN);
1467 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1470 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1472 SETERRNO(EBADF, SS$_IVCHAN);
1478 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1481 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1483 SETERRNO(EBADF, SS$_IVCHAN);
1489 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1492 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1494 SETERRNO(EBADF, SS$_IVCHAN);
1500 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1504 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1505 if (tab && tab->Flush) {
1506 return (*tab->Flush) (aTHX_ f);
1509 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1510 SETERRNO(EBADF, SS$_IVCHAN);
1515 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1516 SETERRNO(EBADF, SS$_IVCHAN);
1522 * Is it good API design to do flush-all on NULL, a potentially
1523 * errorneous input? Maybe some magical value (PerlIO*
1524 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1525 * things on fflush(NULL), but should we be bound by their design
1528 PerlIO **table = &PL_perlio;
1530 while ((f = *table)) {
1532 table = (PerlIO **) (f++);
1533 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1534 if (*f && PerlIO_flush(f) != 0)
1544 PerlIOBase_flush_linebuf(pTHX)
1546 PerlIO **table = &PL_perlio;
1548 while ((f = *table)) {
1550 table = (PerlIO **) (f++);
1551 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1554 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1555 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1563 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1566 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1568 SETERRNO(EBADF, SS$_IVCHAN);
1574 PerlIO_isutf8(PerlIO *f)
1577 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1579 SETERRNO(EBADF, SS$_IVCHAN);
1585 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1588 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1590 SETERRNO(EBADF, SS$_IVCHAN);
1596 Perl_PerlIO_error(pTHX_ PerlIO *f)
1599 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1601 SETERRNO(EBADF, SS$_IVCHAN);
1607 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1610 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1612 SETERRNO(EBADF, SS$_IVCHAN);
1616 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1619 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1621 SETERRNO(EBADF, SS$_IVCHAN);
1625 PerlIO_has_base(PerlIO *f)
1627 if (PerlIOValid(f)) {
1628 return (PerlIOBase(f)->tab->Get_base != NULL);
1634 PerlIO_fast_gets(PerlIO *f)
1636 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1637 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1638 return (tab->Set_ptrcnt != NULL);
1644 PerlIO_has_cntptr(PerlIO *f)
1646 if (PerlIOValid(f)) {
1647 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1648 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1654 PerlIO_canset_cnt(PerlIO *f)
1656 if (PerlIOValid(f)) {
1657 PerlIOl *l = PerlIOBase(f);
1658 return (l->tab->Set_ptrcnt != NULL);
1664 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1667 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1672 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1675 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1680 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1682 if (PerlIOValid(f)) {
1683 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1684 if (tab->Get_ptr == NULL)
1686 return (*tab->Get_ptr) (aTHX_ f);
1692 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1694 if (PerlIOValid(f)) {
1695 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1696 if (tab->Get_cnt == NULL)
1698 return (*tab->Get_cnt) (aTHX_ f);
1704 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1706 if (PerlIOValid(f)) {
1707 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1712 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1714 if (PerlIOValid(f)) {
1715 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1716 if (tab->Set_ptrcnt == NULL) {
1717 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1719 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1724 /*--------------------------------------------------------------------------------------*/
1726 * utf8 and raw dummy layers
1730 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1732 if (PerlIOValid(f)) {
1733 if (tab->kind & PERLIO_K_UTF8)
1734 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1736 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1742 PerlIO_funcs PerlIO_utf8 = {
1743 sizeof(PerlIO_funcs),
1746 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1764 NULL, /* get_base */
1765 NULL, /* get_bufsiz */
1768 NULL, /* set_ptrcnt */
1771 PerlIO_funcs PerlIO_byte = {
1772 sizeof(PerlIO_funcs),
1793 NULL, /* get_base */
1794 NULL, /* get_bufsiz */
1797 NULL, /* set_ptrcnt */
1801 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1802 IV n, const char *mode, int fd, int imode, int perm,
1803 PerlIO *old, int narg, SV **args)
1805 PerlIO_funcs *tab = PerlIO_default_btm();
1806 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1810 PerlIO_funcs PerlIO_raw = {
1811 sizeof(PerlIO_funcs),
1832 NULL, /* get_base */
1833 NULL, /* get_bufsiz */
1836 NULL, /* set_ptrcnt */
1838 /*--------------------------------------------------------------------------------------*/
1839 /*--------------------------------------------------------------------------------------*/
1841 * "Methods" of the "base class"
1845 PerlIOBase_fileno(pTHX_ PerlIO *f)
1847 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1851 PerlIO_modestr(PerlIO * f, char *buf)
1854 if (PerlIOValid(f)) {
1855 IV flags = PerlIOBase(f)->flags;
1856 if (flags & PERLIO_F_APPEND) {
1858 if (flags & PERLIO_F_CANREAD) {
1862 else if (flags & PERLIO_F_CANREAD) {
1864 if (flags & PERLIO_F_CANWRITE)
1867 else if (flags & PERLIO_F_CANWRITE) {
1869 if (flags & PERLIO_F_CANREAD) {
1873 #ifdef PERLIO_USING_CRLF
1874 if (!(flags & PERLIO_F_CRLF))
1884 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1886 PerlIOl *l = PerlIOBase(f);
1888 const char *omode = mode;
1891 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1892 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1893 if (tab->Set_ptrcnt != NULL)
1894 l->flags |= PERLIO_F_FASTGETS;
1896 if (*mode == '#' || *mode == 'I')
1900 l->flags |= PERLIO_F_CANREAD;
1903 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1906 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1909 SETERRNO(EINVAL, LIB$_INVARG);
1915 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1918 l->flags &= ~PERLIO_F_CRLF;
1921 l->flags |= PERLIO_F_CRLF;
1924 SETERRNO(EINVAL, LIB$_INVARG);
1931 l->flags |= l->next->flags &
1932 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1937 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1938 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1939 l->flags, PerlIO_modestr(f, temp));
1945 PerlIOBase_popped(pTHX_ PerlIO *f)
1951 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1954 * Save the position as current head considers it
1956 Off_t old = PerlIO_tell(f);
1958 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1959 PerlIOSelf(f, PerlIOBuf)->posn = old;
1960 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1965 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1967 STDCHAR *buf = (STDCHAR *) vbuf;
1969 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1972 SSize_t avail = PerlIO_get_cnt(f);
1975 take = ((SSize_t)count < avail) ? count : avail;
1977 STDCHAR *ptr = PerlIO_get_ptr(f);
1978 Copy(ptr, buf, take, STDCHAR);
1979 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1983 if (count > 0 && avail <= 0) {
1984 if (PerlIO_fill(f) != 0)
1988 return (buf - (STDCHAR *) vbuf);
1994 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2000 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2006 PerlIOBase_close(pTHX_ PerlIO *f)
2009 PerlIO *n = PerlIONext(f);
2010 if (PerlIO_flush(f) != 0)
2012 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
2014 PerlIOBase(f)->flags &=
2015 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2020 PerlIOBase_eof(pTHX_ PerlIO *f)
2022 if (PerlIOValid(f)) {
2023 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2029 PerlIOBase_error(pTHX_ PerlIO *f)
2031 if (PerlIOValid(f)) {
2032 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2038 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2040 if (PerlIOValid(f)) {
2041 PerlIO *n = PerlIONext(f);
2042 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2049 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2051 if (PerlIOValid(f)) {
2052 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2057 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2063 return sv_dup(arg, param);
2066 return newSVsv(arg);
2069 return newSVsv(arg);
2074 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2076 PerlIO *nexto = PerlIONext(o);
2077 if (PerlIOValid(nexto)) {
2078 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2079 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2082 PerlIO_funcs *self = PerlIOBase(o)->tab;
2085 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2086 self->name, (void*)f, (void*)o, (void*)param);
2088 arg = (*self->Getarg)(aTHX_ o,param,flags);
2090 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2098 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2100 perl_mutex PerlIO_mutex;
2102 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2107 /* Place holder for stdstreams call ??? */
2109 MUTEX_INIT(&PerlIO_mutex);
2114 PerlIOUnix_refcnt_inc(int fd)
2116 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2118 MUTEX_LOCK(&PerlIO_mutex);
2120 PerlIO_fd_refcnt[fd]++;
2121 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2123 MUTEX_UNLOCK(&PerlIO_mutex);
2129 PerlIOUnix_refcnt_dec(int fd)
2132 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2134 MUTEX_LOCK(&PerlIO_mutex);
2136 cnt = --PerlIO_fd_refcnt[fd];
2137 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2139 MUTEX_UNLOCK(&PerlIO_mutex);
2146 PerlIO_cleanup(pTHX)
2150 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2152 PerlIO_debug("Cleanup layers\n");
2154 /* Raise STDIN..STDERR refcount so we don't close them */
2155 for (i=0; i < 3; i++)
2156 PerlIOUnix_refcnt_inc(i);
2157 PerlIO_cleantable(aTHX_ &PL_perlio);
2158 /* Restore STDIN..STDERR refcount */
2159 for (i=0; i < 3; i++)
2160 PerlIOUnix_refcnt_dec(i);
2162 if (PL_known_layers) {
2163 PerlIO_list_free(aTHX_ PL_known_layers);
2164 PL_known_layers = NULL;
2166 if(PL_def_layerlist) {
2167 PerlIO_list_free(aTHX_ PL_def_layerlist);
2168 PL_def_layerlist = NULL;
2174 /*--------------------------------------------------------------------------------------*/
2176 * Bottom-most level for UNIX-like case
2180 struct _PerlIO base; /* The generic part */
2181 int fd; /* UNIX like file descriptor */
2182 int oflags; /* open/fcntl flags */
2186 PerlIOUnix_oflags(const char *mode)
2189 if (*mode == 'I' || *mode == '#')
2194 if (*++mode == '+') {
2201 oflags = O_CREAT | O_TRUNC;
2202 if (*++mode == '+') {
2211 oflags = O_CREAT | O_APPEND;
2212 if (*++mode == '+') {
2225 else if (*mode == 't') {
2227 oflags &= ~O_BINARY;
2231 * Always open in binary mode
2234 if (*mode || oflags == -1) {
2235 SETERRNO(EINVAL, LIB$_INVARG);
2242 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2244 return PerlIOSelf(f, PerlIOUnix)->fd;
2248 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2250 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2251 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2252 if (*PerlIONext(f)) {
2253 /* We never call down so do any pending stuff now */
2254 PerlIO_flush(PerlIONext(f));
2255 s->fd = PerlIO_fileno(PerlIONext(f));
2257 * XXX could (or should) we retrieve the oflags from the open file
2258 * handle rather than believing the "mode" we are passed in? XXX
2259 * Should the value on NULL mode be 0 or -1?
2261 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2263 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2268 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2269 IV n, const char *mode, int fd, int imode,
2270 int perm, PerlIO *f, int narg, SV **args)
2272 if (PerlIOValid(f)) {
2273 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2274 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2277 char *path = SvPV_nolen(*args);
2281 imode = PerlIOUnix_oflags(mode);
2285 fd = PerlLIO_open3(path, imode, perm);
2293 f = PerlIO_allocate(aTHX);
2295 if (!PerlIOValid(f)) {
2296 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2300 s = PerlIOSelf(f, PerlIOUnix);
2303 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2304 PerlIOUnix_refcnt_inc(fd);
2310 * FIXME: pop layers ???
2318 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2320 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2322 if (flags & PERLIO_DUP_FD) {
2323 fd = PerlLIO_dup(fd);
2325 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2326 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2328 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2329 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2331 PerlIOUnix_refcnt_inc(fd);
2340 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2342 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2343 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2344 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2348 SSize_t len = PerlLIO_read(fd, vbuf, count);
2349 if (len >= 0 || errno != EINTR) {
2351 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2352 else if (len == 0 && count != 0)
2353 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2361 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2363 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2365 SSize_t len = PerlLIO_write(fd, vbuf, count);
2366 if (len >= 0 || errno != EINTR) {
2368 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2376 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2379 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2380 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2381 return (new == (Off_t) - 1) ? -1 : 0;
2385 PerlIOUnix_tell(pTHX_ PerlIO *f)
2387 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2392 PerlIOUnix_close(pTHX_ PerlIO *f)
2394 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2396 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2397 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2398 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2403 SETERRNO(EBADF,SS$_IVCHAN);
2406 while (PerlLIO_close(fd) != 0) {
2407 if (errno != EINTR) {
2414 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2419 PerlIO_funcs PerlIO_unix = {
2420 sizeof(PerlIO_funcs),
2427 PerlIOBase_binmode, /* binmode */
2437 PerlIOBase_noop_ok, /* flush */
2438 PerlIOBase_noop_fail, /* fill */
2441 PerlIOBase_clearerr,
2442 PerlIOBase_setlinebuf,
2443 NULL, /* get_base */
2444 NULL, /* get_bufsiz */
2447 NULL, /* set_ptrcnt */
2450 /*--------------------------------------------------------------------------------------*/
2455 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2456 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2457 broken by the last second glibc 2.3 fix
2459 #define STDIO_BUFFER_WRITABLE
2464 struct _PerlIO base;
2465 FILE *stdio; /* The stream */
2469 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2472 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2473 return PerlSIO_fileno(s);
2480 PerlIOStdio_mode(const char *mode, char *tmode)
2486 #ifdef PERLIO_USING_CRLF
2494 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2497 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2498 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2499 if (toptab == tab) {
2500 /* Top is already stdio - pop self (duplicate) and use original */
2501 PerlIO_pop(aTHX_ f);
2504 int fd = PerlIO_fileno(n);
2507 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2508 mode = PerlIOStdio_mode(mode, tmode)))) {
2509 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2510 /* We never call down so do any pending stuff now */
2511 PerlIO_flush(PerlIONext(f));
2518 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2523 PerlIO_importFILE(FILE *stdio, const char *mode)
2529 if (!mode || !*mode) {
2530 /* We need to probe to see how we can open the stream
2531 so start with read/write and then try write and read
2532 we dup() so that we can fclose without loosing the fd.
2534 Note that the errno value set by a failing fdopen
2535 varies between stdio implementations.
2537 int fd = PerlLIO_dup(fileno(stdio));
2538 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2540 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2543 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2546 /* Don't seem to be able to open */
2552 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2553 s = PerlIOSelf(f, PerlIOStdio);
2561 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2562 IV n, const char *mode, int fd, int imode,
2563 int perm, PerlIO *f, int narg, SV **args)
2566 if (PerlIOValid(f)) {
2567 char *path = SvPV_nolen(*args);
2568 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2570 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2571 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2576 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2581 char *path = SvPV_nolen(*args);
2584 fd = PerlLIO_open3(path, imode, perm);
2587 FILE *stdio = PerlSIO_fopen(path, mode);
2591 f = PerlIO_allocate(aTHX);
2593 if ((f = PerlIO_push(aTHX_ f, self,
2594 (mode = PerlIOStdio_mode(mode, tmode)),
2596 s = PerlIOSelf(f, PerlIOStdio);
2598 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2617 stdio = PerlSIO_stdin;
2620 stdio = PerlSIO_stdout;
2623 stdio = PerlSIO_stderr;
2628 stdio = PerlSIO_fdopen(fd, mode =
2629 PerlIOStdio_mode(mode, tmode));
2634 f = PerlIO_allocate(aTHX);
2636 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2637 s = PerlIOSelf(f, PerlIOStdio);
2639 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2649 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2651 /* This assumes no layers underneath - which is what
2652 happens, but is not how I remember it. NI-S 2001/10/16
2654 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2655 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2656 if (flags & PERLIO_DUP_FD) {
2657 int fd = PerlLIO_dup(fileno(stdio));
2660 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2663 /* FIXME: To avoid messy error recovery if dup fails
2664 re-use the existing stdio as though flag was not set
2668 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2669 PerlIOUnix_refcnt_inc(fileno(stdio));
2675 PerlIOStdio_close(pTHX_ PerlIO *f)
2677 #ifdef SOCKS5_VERSION_NAME
2679 Sock_size_t optlen = sizeof(int);
2681 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2686 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2687 /* Do not close it but do flush any buffers */
2688 return PerlIO_flush(f);
2691 #ifdef SOCKS5_VERSION_NAME
2693 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2695 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2697 PerlSIO_fclose(stdio)
2706 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2708 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2711 STDCHAR *buf = (STDCHAR *) vbuf;
2713 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2714 * stdio does not do that for fread()
2716 int ch = PerlSIO_fgetc(s);
2723 got = PerlSIO_fread(vbuf, 1, count, s);
2728 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2731 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2733 #ifdef STDIO_BUFFER_WRITABLE
2734 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2735 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2736 STDCHAR *base = PerlIO_get_base(f);
2737 SSize_t cnt = PerlIO_get_cnt(f);
2738 STDCHAR *ptr = PerlIO_get_ptr(f);
2739 SSize_t avail = ptr - base;
2741 if (avail > count) {
2745 Move(buf-avail,ptr,avail,STDCHAR);
2748 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2749 if (PerlSIO_feof(s) && unread >= 0)
2750 PerlSIO_clearerr(s);
2755 if (PerlIO_has_cntptr(f)) {
2756 /* We can get pointer to buffer but not its base
2757 Do ungetc() but check chars are ending up in the
2760 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2761 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2763 int ch = *--buf & 0xFF;
2764 if (ungetc(ch,s) != ch) {
2765 /* ungetc did not work */
2768 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2769 /* Did not change pointer as expected */
2770 fgetc(s); /* get char back again */
2780 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2786 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2788 return PerlSIO_fwrite(vbuf, 1, count,
2789 PerlIOSelf(f, PerlIOStdio)->stdio);
2793 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2795 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2796 return PerlSIO_fseek(stdio, offset, whence);
2800 PerlIOStdio_tell(pTHX_ PerlIO *f)
2802 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2803 return PerlSIO_ftell(stdio);
2807 PerlIOStdio_flush(pTHX_ PerlIO *f)
2809 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2810 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2811 return PerlSIO_fflush(stdio);
2816 * FIXME: This discards ungetc() and pre-read stuff which is not
2817 * right if this is just a "sync" from a layer above Suspect right
2818 * design is to do _this_ but not have layer above flush this
2819 * layer read-to-read
2822 * Not writeable - sync by attempting a seek
2825 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2833 PerlIOStdio_eof(pTHX_ PerlIO *f)
2835 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2839 PerlIOStdio_error(pTHX_ PerlIO *f)
2841 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2845 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2847 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2851 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2853 #ifdef HAS_SETLINEBUF
2854 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2856 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2862 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2864 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2865 return (STDCHAR*)PerlSIO_get_base(stdio);
2869 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2871 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2872 return PerlSIO_get_bufsiz(stdio);
2876 #ifdef USE_STDIO_PTR
2878 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2880 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2881 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2885 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2887 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2888 return PerlSIO_get_cnt(stdio);
2892 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2894 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2896 #ifdef STDIO_PTR_LVALUE
2897 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2898 #ifdef STDIO_PTR_LVAL_SETS_CNT
2899 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2900 assert(PerlSIO_get_cnt(stdio) == (cnt));
2903 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2905 * Setting ptr _does_ change cnt - we are done
2909 #else /* STDIO_PTR_LVALUE */
2911 #endif /* STDIO_PTR_LVALUE */
2914 * Now (or only) set cnt
2916 #ifdef STDIO_CNT_LVALUE
2917 PerlSIO_set_cnt(stdio, cnt);
2918 #else /* STDIO_CNT_LVALUE */
2919 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2920 PerlSIO_set_ptr(stdio,
2921 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2923 #else /* STDIO_PTR_LVAL_SETS_CNT */
2925 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2926 #endif /* STDIO_CNT_LVALUE */
2933 PerlIOStdio_fill(pTHX_ PerlIO *f)
2935 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2938 * fflush()ing read-only streams can cause trouble on some stdio-s
2940 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2941 if (PerlSIO_fflush(stdio) != 0)
2944 c = PerlSIO_fgetc(stdio);
2948 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2950 #ifdef STDIO_BUFFER_WRITABLE
2951 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2952 /* Fake ungetc() to the real buffer in case system's ungetc
2955 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2956 SSize_t cnt = PerlSIO_get_cnt(stdio);
2957 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2958 if (ptr == base+1) {
2959 *--ptr = (STDCHAR) c;
2960 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2961 if (PerlSIO_feof(stdio))
2962 PerlSIO_clearerr(stdio);
2968 if (PerlIO_has_cntptr(f)) {
2970 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2977 /* An ungetc()d char is handled separately from the regular
2978 * buffer, so we stuff it in the buffer ourselves.
2979 * Should never get called as should hit code above
2981 *(--((*stdio)->_ptr)) = (unsigned char) c;
2984 /* If buffer snoop scheme above fails fall back to
2987 if (PerlSIO_ungetc(c, stdio) != c)
2995 PerlIO_funcs PerlIO_stdio = {
2996 sizeof(PerlIO_funcs),
2998 sizeof(PerlIOStdio),
2999 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3003 PerlIOBase_binmode, /* binmode */
3017 PerlIOStdio_clearerr,
3018 PerlIOStdio_setlinebuf,
3020 PerlIOStdio_get_base,
3021 PerlIOStdio_get_bufsiz,
3026 #ifdef USE_STDIO_PTR
3027 PerlIOStdio_get_ptr,
3028 PerlIOStdio_get_cnt,
3029 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3030 PerlIOStdio_set_ptrcnt
3031 #else /* STDIO_PTR_LVALUE */
3033 #endif /* STDIO_PTR_LVALUE */
3034 #else /* USE_STDIO_PTR */
3038 #endif /* USE_STDIO_PTR */
3042 PerlIO_exportFILE(PerlIO * f, const char *mode)
3046 if (PerlIOValid(f)) {
3049 if (!mode || !*mode) {
3050 mode = PerlIO_modestr(f, buf);
3052 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3055 /* De-link any lower layers so new :stdio sticks */
3057 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3058 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3060 /* Link previous lower layers under new one */
3064 /* restore layers list */
3074 PerlIO_findFILE(PerlIO *f)
3078 if (l->tab == &PerlIO_stdio) {
3079 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3082 l = *PerlIONext(&l);
3084 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3085 return PerlIO_exportFILE(f, Nullch);
3089 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3093 if (l->tab == &PerlIO_stdio) {
3094 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3095 if (s->stdio == f) {
3097 PerlIO_pop(aTHX_ p);
3106 /*--------------------------------------------------------------------------------------*/
3108 * perlio buffer layer
3112 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3114 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3115 int fd = PerlIO_fileno(f);
3116 if (fd >= 0 && PerlLIO_isatty(fd)) {
3117 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3119 if (*PerlIONext(f)) {
3120 Off_t posn = PerlIO_tell(PerlIONext(f));
3121 if (posn != (Off_t) - 1) {
3125 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3129 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3130 IV n, const char *mode, int fd, int imode, int perm,
3131 PerlIO *f, int narg, SV **args)
3133 if (PerlIOValid(f)) {
3134 PerlIO *next = PerlIONext(f);
3135 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3136 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3138 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3143 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3151 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3154 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3156 * if push fails during open, open fails. close will pop us.
3161 fd = PerlIO_fileno(f);
3162 if (init && fd == 2) {
3164 * Initial stderr is unbuffered
3166 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3168 #ifdef PERLIO_USING_CRLF
3169 # ifdef PERLIO_IS_BINMODE_FD
3170 if (PERLIO_IS_BINMODE_FD(fd))
3171 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3175 * do something about failing setmode()? --jhi
3177 PerlLIO_setmode(fd, O_BINARY);
3186 * This "flush" is akin to sfio's sync in that it handles files in either
3187 * read or write state
3190 PerlIOBuf_flush(pTHX_ PerlIO *f)
3192 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3194 PerlIO *n = PerlIONext(f);
3195 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3197 * write() the buffer
3199 STDCHAR *buf = b->buf;
3201 while (p < b->ptr) {
3202 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3206 else if (count < 0 || PerlIO_error(n)) {
3207 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3212 b->posn += (p - buf);
3214 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3215 STDCHAR *buf = PerlIO_get_base(f);
3217 * Note position change
3219 b->posn += (b->ptr - buf);
3220 if (b->ptr < b->end) {
3221 /* We did not consume all of it - try and seek downstream to
3222 our logical position
3224 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3225 /* Reload n as some layers may pop themselves on seek */
3226 b->posn = PerlIO_tell(n = PerlIONext(f));
3229 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3230 data is lost for good - so return saying "ok" having undone
3233 b->posn -= (b->ptr - buf);
3238 b->ptr = b->end = b->buf;
3239 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3240 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3241 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3247 PerlIOBuf_fill(pTHX_ PerlIO *f)
3249 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3250 PerlIO *n = PerlIONext(f);
3253 * Down-stream flush is defined not to loose read data so is harmless.
3254 * we would not normally be fill'ing if there was data left in anycase.
3256 if (PerlIO_flush(f) != 0)
3258 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3259 PerlIOBase_flush_linebuf(aTHX);
3262 PerlIO_get_base(f); /* allocate via vtable */
3264 b->ptr = b->end = b->buf;
3266 if (!PerlIOValid(n)) {
3267 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3271 if (PerlIO_fast_gets(n)) {
3273 * Layer below is also buffered. We do _NOT_ want to call its
3274 * ->Read() because that will loop till it gets what we asked for
3275 * which may hang on a pipe etc. Instead take anything it has to
3276 * hand, or ask it to fill _once_.
3278 avail = PerlIO_get_cnt(n);
3280 avail = PerlIO_fill(n);
3282 avail = PerlIO_get_cnt(n);
3284 if (!PerlIO_error(n) && PerlIO_eof(n))
3289 STDCHAR *ptr = PerlIO_get_ptr(n);
3290 SSize_t cnt = avail;
3291 if (avail > (SSize_t)b->bufsiz)
3293 Copy(ptr, b->buf, avail, STDCHAR);
3294 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3298 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3302 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3304 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3307 b->end = b->buf + avail;
3308 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3313 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3315 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3316 if (PerlIOValid(f)) {
3319 return PerlIOBase_read(aTHX_ f, vbuf, count);
3325 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3327 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3328 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3331 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3336 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3338 * Buffer is already a read buffer, we can overwrite any chars
3339 * which have been read back to buffer start
3341 avail = (b->ptr - b->buf);
3345 * Buffer is idle, set it up so whole buffer is available for
3349 b->end = b->buf + avail;
3351 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3353 * Buffer extends _back_ from where we are now
3355 b->posn -= b->bufsiz;
3357 if (avail > (SSize_t) count) {
3359 * If we have space for more than count, just move count
3367 * In simple stdio-like ungetc() case chars will be already
3370 if (buf != b->ptr) {
3371 Copy(buf, b->ptr, avail, STDCHAR);
3375 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3379 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3385 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3387 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3388 const STDCHAR *buf = (const STDCHAR *) vbuf;
3392 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3395 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3396 if ((SSize_t) count < avail)
3398 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3399 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3414 Copy(buf, b->ptr, avail, STDCHAR);
3421 if (b->ptr >= (b->buf + b->bufsiz))
3424 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3430 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3433 if ((code = PerlIO_flush(f)) == 0) {
3434 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3435 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3436 code = PerlIO_seek(PerlIONext(f), offset, whence);
3438 b->posn = PerlIO_tell(PerlIONext(f));
3445 PerlIOBuf_tell(pTHX_ PerlIO *f)
3447 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3449 * b->posn is file position where b->buf was read, or will be written
3451 Off_t posn = b->posn;
3454 * If buffer is valid adjust position by amount in buffer
3456 posn += (b->ptr - b->buf);
3462 PerlIOBuf_popped(pTHX_ PerlIO *f)
3464 IV code = PerlIOBase_popped(aTHX_ f);
3465 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3466 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3470 b->ptr = b->end = b->buf;
3471 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3476 PerlIOBuf_close(pTHX_ PerlIO *f)
3478 IV code = PerlIOBase_close(aTHX_ f);
3479 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3480 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3484 b->ptr = b->end = b->buf;
3485 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3490 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3492 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3499 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3501 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3504 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3505 return (b->end - b->ptr);
3510 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3512 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3517 Newz('B',b->buf,b->bufsiz, STDCHAR);
3519 b->buf = (STDCHAR *) & b->oneword;
3520 b->bufsiz = sizeof(b->oneword);
3529 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3531 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3534 return (b->end - b->buf);
3538 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3540 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3544 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3545 assert(PerlIO_get_cnt(f) == cnt);
3546 assert(b->ptr >= b->buf);
3548 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3552 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3554 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3559 PerlIO_funcs PerlIO_perlio = {
3560 sizeof(PerlIO_funcs),
3563 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3567 PerlIOBase_binmode, /* binmode */
3581 PerlIOBase_clearerr,
3582 PerlIOBase_setlinebuf,
3587 PerlIOBuf_set_ptrcnt,
3590 /*--------------------------------------------------------------------------------------*/
3592 * Temp layer to hold unread chars when cannot do it any other way
3596 PerlIOPending_fill(pTHX_ PerlIO *f)
3599 * Should never happen
3606 PerlIOPending_close(pTHX_ PerlIO *f)
3609 * A tad tricky - flush pops us, then we close new top
3612 return PerlIO_close(f);
3616 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3619 * A tad tricky - flush pops us, then we seek new top
3622 return PerlIO_seek(f, offset, whence);
3627 PerlIOPending_flush(pTHX_ PerlIO *f)
3629 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3630 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3634 PerlIO_pop(aTHX_ f);
3639 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3645 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3650 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3652 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3653 PerlIOl *l = PerlIOBase(f);
3655 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3656 * etc. get muddled when it changes mid-string when we auto-pop.
3658 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3659 (PerlIOBase(PerlIONext(f))->
3660 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3665 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3667 SSize_t avail = PerlIO_get_cnt(f);
3669 if ((SSize_t)count < avail)
3672 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3673 if (got >= 0 && got < (SSize_t)count) {
3675 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3676 if (more >= 0 || got == 0)
3682 PerlIO_funcs PerlIO_pending = {
3683 sizeof(PerlIO_funcs),
3686 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3687 PerlIOPending_pushed,
3690 PerlIOBase_binmode, /* binmode */
3699 PerlIOPending_close,
3700 PerlIOPending_flush,
3704 PerlIOBase_clearerr,
3705 PerlIOBase_setlinebuf,
3710 PerlIOPending_set_ptrcnt,
3715 /*--------------------------------------------------------------------------------------*/
3717 * crlf - translation On read translate CR,LF to "\n" we do this by
3718 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3719 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3723 PerlIOBuf base; /* PerlIOBuf stuff */
3724 STDCHAR *nl; /* Position of crlf we "lied" about in the
3729 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3732 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3733 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3735 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3736 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3737 PerlIOBase(f)->flags);
3744 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3746 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3751 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3752 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3754 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3755 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3757 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3762 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3763 b->end = b->ptr = b->buf + b->bufsiz;
3764 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3765 b->posn -= b->bufsiz;
3767 while (count > 0 && b->ptr > b->buf) {
3770 if (b->ptr - 2 >= b->buf) {
3793 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3795 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3798 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3799 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3800 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3801 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3803 while (nl < b->end && *nl != 0xd)
3805 if (nl < b->end && *nl == 0xd) {
3807 if (nl + 1 < b->end) {
3814 * Not CR,LF but just CR
3822 * Blast - found CR as last char in buffer
3827 * They may not care, defer work as long as
3831 return (nl - b->ptr);
3835 b->ptr++; /* say we have read it as far as
3836 * flush() is concerned */
3837 b->buf++; /* Leave space in front of buffer */
3838 b->bufsiz--; /* Buffer is thus smaller */
3839 code = PerlIO_fill(f); /* Fetch some more */
3840 b->bufsiz++; /* Restore size for next time */
3841 b->buf--; /* Point at space */
3842 b->ptr = nl = b->buf; /* Which is what we hand
3844 b->posn--; /* Buffer starts here */
3845 *nl = 0xd; /* Fill in the CR */
3847 goto test; /* fill() call worked */
3849 * CR at EOF - just fall through
3851 /* Should we clear EOF though ??? */
3856 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3862 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3864 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3865 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3871 if (ptr == b->end && *c->nl == 0xd) {
3872 /* Defered CR at end of buffer case - we lied about count */
3884 * Test code - delete when it works ...
3886 IV flags = PerlIOBase(f)->flags;
3887 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3888 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3889 /* Defered CR at end of buffer case - we lied about count */
3895 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3896 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3904 * They have taken what we lied about
3912 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3916 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3918 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3919 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3921 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3922 const STDCHAR *buf = (const STDCHAR *) vbuf;
3923 const STDCHAR *ebuf = buf + count;
3926 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3928 while (buf < ebuf) {
3929 STDCHAR *eptr = b->buf + b->bufsiz;
3930 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3931 while (buf < ebuf && b->ptr < eptr) {
3933 if ((b->ptr + 2) > eptr) {
3941 *(b->ptr)++ = 0xd; /* CR */
3942 *(b->ptr)++ = 0xa; /* LF */
3944 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3954 if (b->ptr >= eptr) {
3960 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3962 return (buf - (STDCHAR *) vbuf);
3967 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3969 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3974 return PerlIOBuf_flush(aTHX_ f);
3978 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3980 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3981 /* In text mode - flush any pending stuff and flip it */
3982 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3983 #ifndef PERLIO_USING_CRLF
3984 /* CRLF is unusual case - if this is just the :crlf layer pop it */
3985 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
3986 PerlIO_pop(aTHX_ f);
3993 PerlIO_funcs PerlIO_crlf = {
3994 sizeof(PerlIO_funcs),
3997 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
3999 PerlIOBuf_popped, /* popped */
4001 PerlIOCrlf_binmode, /* binmode */
4005 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4007 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4008 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4016 PerlIOBase_clearerr,
4017 PerlIOBase_setlinebuf,
4022 PerlIOCrlf_set_ptrcnt,
4026 /*--------------------------------------------------------------------------------------*/
4028 * mmap as "buffer" layer
4032 PerlIOBuf base; /* PerlIOBuf stuff */
4033 Mmap_t mptr; /* Mapped address */
4034 Size_t len; /* mapped length */
4035 STDCHAR *bbuf; /* malloced buffer if map fails */
4038 static size_t page_size = 0;
4041 PerlIOMmap_map(pTHX_ PerlIO *f)
4043 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4044 IV flags = PerlIOBase(f)->flags;
4048 if (flags & PERLIO_F_CANREAD) {
4049 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4050 int fd = PerlIO_fileno(f);
4052 code = Fstat(fd, &st);
4053 if (code == 0 && S_ISREG(st.st_mode)) {
4054 SSize_t len = st.st_size - b->posn;
4058 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4060 SETERRNO(0, SS$_NORMAL);
4061 # ifdef _SC_PAGESIZE
4062 page_size = sysconf(_SC_PAGESIZE);
4064 page_size = sysconf(_SC_PAGE_SIZE);
4066 if ((long) page_size < 0) {
4071 (void) SvUPGRADE(error, SVt_PV);
4072 msg = SvPVx(error, n_a);
4073 Perl_croak(aTHX_ "panic: sysconf: %s",
4078 "panic: sysconf: pagesize unknown");
4082 # ifdef HAS_GETPAGESIZE
4083 page_size = getpagesize();
4085 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4086 page_size = PAGESIZE; /* compiletime, bad */
4090 if ((IV) page_size <= 0)
4091 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4096 * This is a hack - should never happen - open should
4099 b->posn = PerlIO_tell(PerlIONext(f));
4101 posn = (b->posn / page_size) * page_size;
4102 len = st.st_size - posn;
4103 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4104 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4105 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4106 madvise(m->mptr, len, MADV_SEQUENTIAL);
4108 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4109 madvise(m->mptr, len, MADV_WILLNEED);
4111 PerlIOBase(f)->flags =
4112 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4113 b->end = ((STDCHAR *) m->mptr) + len;
4114 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4123 PerlIOBase(f)->flags =
4124 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4126 b->ptr = b->end = b->ptr;
4135 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4137 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4138 PerlIOBuf *b = &m->base;
4142 code = munmap(m->mptr, m->len);
4146 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4149 b->ptr = b->end = b->buf;
4150 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4156 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4158 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4159 PerlIOBuf *b = &m->base;
4160 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4162 * Already have a readbuffer in progress
4168 * We have a write buffer or flushed PerlIOBuf read buffer
4170 m->bbuf = b->buf; /* save it in case we need it again */
4171 b->buf = NULL; /* Clear to trigger below */
4174 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4177 * Map did not work - recover PerlIOBuf buffer if we have one
4182 b->ptr = b->end = b->buf;
4185 return PerlIOBuf_get_base(aTHX_ f);
4189 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4191 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4192 PerlIOBuf *b = &m->base;
4193 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4195 if (b->ptr && (b->ptr - count) >= b->buf
4196 && memEQ(b->ptr - count, vbuf, count)) {
4198 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4203 * Loose the unwritable mapped buffer
4207 * If flush took the "buffer" see if we have one from before
4209 if (!b->buf && m->bbuf)
4212 PerlIOBuf_get_base(aTHX_ f);
4216 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4220 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4222 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4223 PerlIOBuf *b = &m->base;
4224 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4226 * No, or wrong sort of, buffer
4229 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4233 * If unmap took the "buffer" see if we have one from before
4235 if (!b->buf && m->bbuf)
4238 PerlIOBuf_get_base(aTHX_ f);
4242 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4246 PerlIOMmap_flush(pTHX_ PerlIO *f)
4248 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4249 PerlIOBuf *b = &m->base;
4250 IV code = PerlIOBuf_flush(aTHX_ f);
4252 * Now we are "synced" at PerlIOBuf level
4259 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4264 * We seem to have a PerlIOBuf buffer which was not mapped
4265 * remember it in case we need one later
4274 PerlIOMmap_fill(pTHX_ PerlIO *f)
4276 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4277 IV code = PerlIO_flush(f);
4278 if (code == 0 && !b->buf) {
4279 code = PerlIOMmap_map(aTHX_ f);
4281 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4282 code = PerlIOBuf_fill(aTHX_ f);
4288 PerlIOMmap_close(pTHX_ PerlIO *f)
4290 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4291 PerlIOBuf *b = &m->base;
4292 IV code = PerlIO_flush(f);
4296 b->ptr = b->end = b->buf;
4298 if (PerlIOBuf_close(aTHX_ f) != 0)
4304 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4306 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4310 PerlIO_funcs PerlIO_mmap = {
4311 sizeof(PerlIO_funcs),
4314 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4318 PerlIOBase_binmode, /* binmode */
4332 PerlIOBase_clearerr,
4333 PerlIOBase_setlinebuf,
4334 PerlIOMmap_get_base,
4338 PerlIOBuf_set_ptrcnt,
4341 #endif /* HAS_MMAP */
4344 Perl_PerlIO_stdin(pTHX)
4347 PerlIO_stdstreams(aTHX);
4349 return &PL_perlio[1];
4353 Perl_PerlIO_stdout(pTHX)
4356 PerlIO_stdstreams(aTHX);
4358 return &PL_perlio[2];
4362 Perl_PerlIO_stderr(pTHX)
4365 PerlIO_stdstreams(aTHX);
4367 return &PL_perlio[3];
4370 /*--------------------------------------------------------------------------------------*/
4373 PerlIO_getname(PerlIO *f, char *buf)
4378 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4380 name = fgetname(stdio, buf);
4382 Perl_croak(aTHX_ "Don't know how to get file name");
4388 /*--------------------------------------------------------------------------------------*/
4390 * Functions which can be called on any kind of PerlIO implemented in
4394 #undef PerlIO_fdopen
4396 PerlIO_fdopen(int fd, const char *mode)
4399 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4404 PerlIO_open(const char *path, const char *mode)
4407 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4408 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4411 #undef Perlio_reopen
4413 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4416 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4417 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4422 PerlIO_getc(PerlIO *f)
4426 SSize_t count = PerlIO_read(f, buf, 1);
4428 return (unsigned char) buf[0];
4433 #undef PerlIO_ungetc
4435 PerlIO_ungetc(PerlIO *f, int ch)
4440 if (PerlIO_unread(f, &buf, 1) == 1)
4448 PerlIO_putc(PerlIO *f, int ch)
4452 return PerlIO_write(f, &buf, 1);
4457 PerlIO_puts(PerlIO *f, const char *s)
4460 STRLEN len = strlen(s);
4461 return PerlIO_write(f, s, len);
4464 #undef PerlIO_rewind
4466 PerlIO_rewind(PerlIO *f)
4469 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4473 #undef PerlIO_vprintf
4475 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4478 SV *sv = newSVpvn("", 0);
4484 Perl_va_copy(ap, apc);
4485 sv_vcatpvf(sv, fmt, &apc);
4487 sv_vcatpvf(sv, fmt, &ap);
4490 wrote = PerlIO_write(f, s, len);
4495 #undef PerlIO_printf
4497 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4502 result = PerlIO_vprintf(f, fmt, ap);
4507 #undef PerlIO_stdoutf
4509 PerlIO_stdoutf(const char *fmt, ...)
4515 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4520 #undef PerlIO_tmpfile
4522 PerlIO_tmpfile(void)
4525 * I have no idea how portable mkstemp() is ...
4527 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4530 FILE *stdio = PerlSIO_tmpfile();
4532 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4533 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4540 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4541 int fd = mkstemp(SvPVX(sv));
4544 f = PerlIO_fdopen(fd, "w+");
4546 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4548 PerlLIO_unlink(SvPVX(sv));
4558 #endif /* USE_SFIO */
4559 #endif /* PERLIO_IS_STDIO */
4561 /*======================================================================================*/
4563 * Now some functions in terms of above which may be needed even if we are
4564 * not in true PerlIO mode
4568 #undef PerlIO_setpos
4570 PerlIO_setpos(PerlIO *f, SV *pos)
4575 Off_t *posn = (Off_t *) SvPV(pos, len);
4576 if (f && len == sizeof(Off_t))
4577 return PerlIO_seek(f, *posn, SEEK_SET);
4579 SETERRNO(EINVAL, SS$_IVCHAN);
4583 #undef PerlIO_setpos
4585 PerlIO_setpos(PerlIO *f, SV *pos)
4590 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4591 if (f && len == sizeof(Fpos_t)) {
4592 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4593 return fsetpos64(f, fpos);
4595 return fsetpos(f, fpos);
4599 SETERRNO(EINVAL, SS$_IVCHAN);
4605 #undef PerlIO_getpos
4607 PerlIO_getpos(PerlIO *f, SV *pos)
4610 Off_t posn = PerlIO_tell(f);
4611 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4612 return (posn == (Off_t) - 1) ? -1 : 0;
4615 #undef PerlIO_getpos
4617 PerlIO_getpos(PerlIO *f, SV *pos)
4622 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4623 code = fgetpos64(f, &fpos);
4625 code = fgetpos(f, &fpos);
4627 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4632 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4635 vprintf(char *pat, char *args)
4637 _doprnt(pat, args, stdout);
4638 return 0; /* wrong, but perl doesn't use the return
4643 vfprintf(FILE *fd, char *pat, char *args)
4645 _doprnt(pat, args, fd);
4646 return 0; /* wrong, but perl doesn't use the return
4652 #ifndef PerlIO_vsprintf
4654 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4656 int val = vsprintf(s, fmt, ap);
4658 if (strlen(s) >= (STRLEN) n) {
4660 (void) PerlIO_puts(Perl_error_log,
4661 "panic: sprintf overflow - memory corrupted!\n");
4669 #ifndef PerlIO_sprintf
4671 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4676 result = PerlIO_vsprintf(s, n, fmt, ap);