2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
9 * at the dispatch tables, even when we do not need it for other reasons.
10 * Invent a dSYS macro to abstract this out
12 #ifdef PERL_IMPLICIT_SYS
25 #define PERLIO_NOT_STDIO 0
26 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 * This file provides those parts of PerlIO abstraction
33 * which are not #defined in perlio.h.
34 * Which these are depends on various Configure #ifdef's
38 #define PERL_IN_PERLIO_C
41 #ifdef PERL_IMPLICIT_CONTEXT
49 perlsio_binmode(FILE *fp, int iotype, int mode)
52 * This used to be contents of do_binmode in doio.c
55 # if defined(atarist) || defined(__MINT__)
58 ((FILE *) fp)->_flag |= _IOBIN;
60 ((FILE *) fp)->_flag &= ~_IOBIN;
67 if (PerlLIO_setmode(fp, mode) != -1) {
69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
71 # if defined(WIN32) && defined(__BORLANDC__)
73 * The translation mode of the stream is maintained independent of
74 * the translation mode of the fd in the Borland RTL (heavy
75 * digging through their runtime sources reveal). User has to set
76 * the mode explicitly for the stream (though they don't document
77 * this anywhere). GSAR 97-5-24
91 # if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
103 #define O_ACCMODE 3 /* Assume traditional implementation */
107 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
109 int result = rawmode & O_ACCMODE;
114 ptype = IoTYPE_RDONLY;
117 ptype = IoTYPE_WRONLY;
125 *writing = (result != O_RDONLY);
127 if (result == O_RDONLY) {
131 else if (rawmode & O_APPEND) {
133 if (result != O_WRONLY)
138 if (result == O_WRONLY)
145 if (rawmode & O_BINARY)
151 #ifndef PERLIO_LAYERS
153 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
155 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
158 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
166 PerlIO_destruct(pTHX)
171 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
176 return perlsio_binmode(fp, iotype, mode);
181 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
185 int fd = PerlLIO_dup(PerlIO_fileno(f));
188 int omode = fcntl(fd, F_GETFL);
189 PerlIO_intmode2str(omode,mode,NULL);
190 /* the r+ is a hack */
191 return PerlIO_fdopen(fd, mode);
196 SETERRNO(EBADF, SS$_IVCHAN);
204 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
208 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
209 int imode, int perm, PerlIO *old, int narg, SV **args)
212 if (*args == &PL_sv_undef)
213 return PerlIO_tmpfile();
215 char *name = SvPV_nolen(*args);
217 fd = PerlLIO_open3(name, imode, perm);
219 return PerlIO_fdopen(fd, (char *) mode + 1);
222 return PerlIO_reopen(name, mode, old);
225 return PerlIO_open(name, mode);
230 return PerlIO_fdopen(fd, (char *) mode);
235 XS(XS_PerlIO__Layer__find)
239 Perl_croak(aTHX_ "Usage class->find(name[,load])");
241 char *name = SvPV_nolen(ST(1));
242 ST(0) = (strEQ(name, "crlf")
243 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
250 Perl_boot_core_PerlIO(pTHX)
252 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
258 #ifdef PERLIO_IS_STDIO
264 * Does nothing (yet) except force this file to be included in perl
265 * binary. That allows this file to force inclusion of other functions
266 * that may be required by loadable extensions e.g. for
267 * FileHandle::tmpfile
271 #undef PerlIO_tmpfile
278 #else /* PERLIO_IS_STDIO */
286 * This section is just to make sure these functions get pulled in from
290 #undef PerlIO_tmpfile
301 * Force this file to be included in perl binary. Which allows this
302 * file to force inclusion of other functions that may be required by
303 * loadable extensions e.g. for FileHandle::tmpfile
307 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
308 * results in a lot of lseek()s to regular files and lot of small
311 sfset(sfstdout, SF_SHARE, 0);
315 PerlIO_importFILE(FILE *stdio, int fl)
317 int fd = fileno(stdio);
318 PerlIO *r = PerlIO_fdopen(fd, "r+");
323 PerlIO_findFILE(PerlIO *pio)
325 int fd = PerlIO_fileno(pio);
326 FILE *f = fdopen(fd, "r+");
328 if (!f && errno == EINVAL)
330 if (!f && errno == EINVAL)
337 /*======================================================================================*/
339 * Implement all the PerlIO interface ourselves.
345 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
352 #include <sys/mman.h>
356 void PerlIO_debug(const char *fmt, ...)
357 __attribute__ ((format(__printf__, 1, 2)));
360 PerlIO_debug(const char *fmt, ...)
367 char *s = PerlEnv_getenv("PERLIO_DEBUG");
369 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
376 /* Use fixed buffer as sv_catpvf etc. needs SVs */
380 s = CopFILE(PL_curcop);
383 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
384 len = strlen(buffer);
385 vsprintf(buffer+len, fmt, ap);
386 PerlLIO_write(dbg, buffer, strlen(buffer));
388 SV *sv = newSVpvn("", 0);
391 s = CopFILE(PL_curcop);
394 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
395 (IV) CopLINE(PL_curcop));
396 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
399 PerlLIO_write(dbg, s, len);
406 /*--------------------------------------------------------------------------------------*/
409 * Inner level routines
413 * Table of pointers to the PerlIO structs (malloc'ed)
415 #define PERLIO_TABLE_SIZE 64
418 PerlIO_allocate(pTHX)
421 * Find a free slot in the table, allocating new table as necessary
426 while ((f = *last)) {
428 last = (PerlIO **) (f);
429 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
435 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
443 #undef PerlIO_fdupopen
445 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
448 PerlIO_funcs *tab = PerlIOBase(f)->tab;
450 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
451 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
455 SETERRNO(EBADF, SS$_IVCHAN);
461 PerlIO_cleantable(pTHX_ PerlIO **tablep)
463 PerlIO *table = *tablep;
466 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
467 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
468 PerlIO *f = table + i;
480 PerlIO_list_alloc(pTHX)
483 Newz('L', list, 1, PerlIO_list_t);
489 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
492 if (--list->refcnt == 0) {
495 for (i = 0; i < list->cur; i++) {
496 if (list->array[i].arg)
497 SvREFCNT_dec(list->array[i].arg);
499 Safefree(list->array);
507 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
510 if (list->cur >= list->len) {
513 Renew(list->array, list->len, PerlIO_pair_t);
515 New('l', list->array, list->len, PerlIO_pair_t);
517 p = &(list->array[list->cur++]);
519 if ((p->arg = arg)) {
525 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
527 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
530 list = PerlIO_list_alloc(aTHX);
531 for (i=0; i < proto->cur; i++) {
533 if (proto->array[i].arg)
534 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
535 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
542 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
545 PerlIO **table = &proto->Iperlio;
548 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
549 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
550 PerlIO_allocate(aTHX); /* root slot is never used */
551 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
552 while ((f = *table)) {
554 table = (PerlIO **) (f++);
555 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
557 (void) fp_dup(f, 0, param);
566 PerlIO_destruct(pTHX)
568 PerlIO **table = &PL_perlio;
571 PerlIO_debug("Destruct %p\n",aTHX);
573 while ((f = *table)) {
575 table = (PerlIO **) (f++);
576 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
580 if (l->tab->kind & PERLIO_K_DESTRUCT) {
581 PerlIO_debug("Destruct popping %s\n", l->tab->name);
592 PerlIO_list_free(aTHX_ PL_known_layers);
593 PL_known_layers = NULL;
594 PerlIO_list_free(aTHX_ PL_def_layerlist);
595 PL_def_layerlist = NULL;
599 PerlIO_pop(pTHX_ PerlIO *f)
603 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
604 if (l->tab->Popped) {
606 * If popped returns non-zero do not free its layer structure
607 * it has either done so itself, or it is shared and still in
610 if ((*l->tab->Popped) (f) != 0)
618 /*--------------------------------------------------------------------------------------*/
620 * XS Interface for perl code
624 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
627 if ((SSize_t) len <= 0)
629 for (i = 0; i < PL_known_layers->cur; i++) {
630 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
631 if (memEQ(f->name, name, len)) {
632 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
636 if (load && PL_subname && PL_def_layerlist
637 && PL_def_layerlist->cur >= 2) {
638 SV *pkgsv = newSVpvn("PerlIO", 6);
639 SV *layer = newSVpvn(name, len);
642 * The two SVs are magically freed by load_module
644 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
646 return PerlIO_find_layer(aTHX_ name, len, 0);
648 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
652 #ifdef USE_ATTRIBUTES_FOR_PERLIO
655 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
658 IO *io = GvIOn((GV *) SvRV(sv));
659 PerlIO *ifp = IoIFP(io);
660 PerlIO *ofp = IoOFP(io);
661 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
667 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
670 IO *io = GvIOn((GV *) SvRV(sv));
671 PerlIO *ifp = IoIFP(io);
672 PerlIO *ofp = IoOFP(io);
673 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
679 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
681 Perl_warn(aTHX_ "clear %" SVf, sv);
686 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
688 Perl_warn(aTHX_ "free %" SVf, sv);
692 MGVTBL perlio_vtab = {
700 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
703 SV *sv = SvRV(ST(1));
708 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
710 mg = mg_find(sv, PERL_MAGIC_ext);
711 mg->mg_virtual = &perlio_vtab;
713 Perl_warn(aTHX_ "attrib %" SVf, sv);
714 for (i = 2; i < items; i++) {
716 const char *name = SvPV(ST(i), len);
717 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
719 av_push(av, SvREFCNT_inc(layer));
730 #endif /* USE_ATTIBUTES_FOR_PERLIO */
733 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
735 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
736 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
740 XS(XS_PerlIO__Layer__find)
744 Perl_croak(aTHX_ "Usage class->find(name[,load])");
747 char *name = SvPV(ST(1), len);
748 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
749 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
751 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
758 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
760 if (!PL_known_layers)
761 PL_known_layers = PerlIO_list_alloc(aTHX);
762 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
763 PerlIO_debug("define %s %p\n", tab->name, tab);
767 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
770 const char *s = names;
772 while (isSPACE(*s) || *s == ':')
777 const char *as = Nullch;
779 if (!isIDFIRST(*s)) {
781 * Message is consistent with how attribute lists are
782 * passed. Even though this means "foo : : bar" is
783 * seen as an invalid separator character.
785 char q = ((*s == '\'') ? '"' : '\'');
787 "perlio: invalid separator character %c%c%c in layer specification list %s",
793 } while (isALNUM(*e));
809 * It's a nul terminated string, not allowed
810 * to \ the terminating null. Anything other
811 * character is passed over.
822 "perlio: argument list not closed for layer \"%.*s\"",
834 PerlIO_funcs *layer =
835 PerlIO_find_layer(aTHX_ s, llen, 1);
837 PerlIO_list_push(aTHX_ av, layer,
843 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
856 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
858 PerlIO_funcs *tab = &PerlIO_perlio;
859 if (O_BINARY != O_TEXT) {
863 if (PerlIO_stdio.Set_ptrcnt) {
867 PerlIO_debug("Pushing %s\n", tab->name);
868 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
873 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
875 return av->array[n].arg;
879 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
881 if (n >= 0 && n < av->cur) {
882 PerlIO_debug("Layer %" IVdf " is %s\n", n,
883 av->array[n].funcs->name);
884 return av->array[n].funcs;
887 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
892 PerlIO_default_layers(pTHX)
894 if (!PL_def_layerlist) {
895 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
896 PerlIO_funcs *osLayer = &PerlIO_unix;
897 PL_def_layerlist = PerlIO_list_alloc(aTHX);
898 PerlIO_define_layer(aTHX_ & PerlIO_unix);
899 #if defined(WIN32) && !defined(UNDER_CE)
900 PerlIO_define_layer(aTHX_ & PerlIO_win32);
902 osLayer = &PerlIO_win32;
905 PerlIO_define_layer(aTHX_ & PerlIO_raw);
906 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
907 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
908 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
910 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
912 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
913 PerlIO_define_layer(aTHX_ & PerlIO_byte);
914 PerlIO_list_push(aTHX_ PL_def_layerlist,
915 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
918 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
921 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
924 if (PL_def_layerlist->cur < 2) {
925 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
927 return PL_def_layerlist;
931 Perl_boot_core_PerlIO(pTHX)
933 #ifdef USE_ATTRIBUTES_FOR_PERLIO
934 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
937 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
941 PerlIO_default_layer(pTHX_ I32 n)
943 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
946 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
949 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
950 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
953 PerlIO_stdstreams(pTHX)
956 PerlIO_allocate(aTHX);
957 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
958 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
959 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
964 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
967 Newc('L',l,tab->size,char,PerlIOl);
969 Zero(l, tab->size, char);
973 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
974 (mode) ? mode : "(Null)", arg);
975 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
984 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
997 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
1000 * Remove the dummy layer
1003 PerlIO_pop(aTHX_ f);
1005 * Pop back to bottom layer
1009 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1010 if (*PerlIONext(f)) {
1011 PerlIO_pop(aTHX_ f);
1015 * Nothing bellow - push unix on top then remove it
1017 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1018 PerlIO_pop(aTHX_ PerlIONext(f));
1023 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1030 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1031 PerlIO_list_t *layers, IV n)
1033 IV max = layers->cur;
1036 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1038 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1049 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1053 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1054 code = PerlIO_parse_layers(aTHX_ layers, names);
1056 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1058 PerlIO_list_free(aTHX_ layers);
1064 /*--------------------------------------------------------------------------------------*/
1066 * Given the abstraction above the public API functions
1070 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1072 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1073 f, PerlIOBase(f)->tab->name, iotype, mode,
1074 (names) ? names : "(Null)");
1075 /* Can't flush if switching encodings. */
1076 if (!(names && memEQ(names, ":encoding(", 10))) {
1078 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1081 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1082 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1085 top = PerlIONext(top);
1090 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1093 #undef PerlIO__close
1095 PerlIO__close(PerlIO *f)
1098 return (*PerlIOBase(f)->tab->Close) (f);
1100 SETERRNO(EBADF, SS$_IVCHAN);
1107 PerlIO_close(PerlIO *f)
1112 code = (*PerlIOBase(f)->tab->Close) (f);
1114 PerlIO_pop(aTHX_ f);
1120 #undef PerlIO_fileno
1122 PerlIO_fileno(PerlIO *f)
1125 return (*PerlIOBase(f)->tab->Fileno) (f);
1127 SETERRNO(EBADF, SS$_IVCHAN);
1133 PerlIO_context_layers(pTHX_ const char *mode)
1135 const char *type = NULL;
1137 * Need to supply default layer info from open.pm
1140 SV *layers = PL_curcop->cop_io;
1143 type = SvPV(layers, len);
1144 if (type && mode[0] != 'r') {
1146 * Skip to write part
1148 const char *s = strchr(type, 0);
1149 if (s && (s - type) < len) {
1158 static PerlIO_funcs *
1159 PerlIO_layer_from_ref(pTHX_ SV *sv)
1162 * For any scalar type load the handler which is bundled with perl
1164 if (SvTYPE(sv) < SVt_PVAV)
1165 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1168 * For other types allow if layer is known but don't try and load it
1170 switch (SvTYPE(sv)) {
1172 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1174 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1176 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1178 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1184 PerlIO_resolve_layers(pTHX_ const char *layers,
1185 const char *mode, int narg, SV **args)
1187 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1190 PerlIO_stdstreams(aTHX);
1194 * If it is a reference but not an object see if we have a handler
1197 if (SvROK(arg) && !sv_isobject(arg)) {
1198 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1200 def = PerlIO_list_alloc(aTHX);
1201 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1205 * Don't fail if handler cannot be found :Via(...) etc. may do
1206 * something sensible else we will just stringfy and open
1212 layers = PerlIO_context_layers(aTHX_ mode);
1213 if (layers && *layers) {
1217 av = PerlIO_list_alloc(aTHX);
1218 for (i = 0; i < def->cur; i++) {
1219 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1226 PerlIO_parse_layers(aTHX_ av, layers);
1237 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1238 int imode, int perm, PerlIO *f, int narg, SV **args)
1240 if (!f && narg == 1 && *args == &PL_sv_undef) {
1241 if ((f = PerlIO_tmpfile())) {
1243 layers = PerlIO_context_layers(aTHX_ mode);
1244 if (layers && *layers)
1245 PerlIO_apply_layers(aTHX_ f, mode, layers);
1249 PerlIO_list_t *layera = NULL;
1251 PerlIO_funcs *tab = NULL;
1254 * This is "reopen" - it is not tested as perl does not use it
1258 layera = PerlIO_list_alloc(aTHX);
1261 (l->tab->Getarg) ? (*l->tab->
1262 Getarg) (&l) : &PL_sv_undef;
1263 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1264 l = *PerlIONext(&l);
1268 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1271 * Start at "top" of layer stack
1273 n = layera->cur - 1;
1275 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1284 * Found that layer 'n' can do opens - call it
1286 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1287 tab->name, layers, mode, fd, imode, perm, f, narg,
1289 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1292 if (n + 1 < layera->cur) {
1294 * More layers above the one that we used to open -
1297 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1304 PerlIO_list_free(aTHX_ layera);
1310 #undef PerlIO_fdopen
1312 PerlIO_fdopen(int fd, const char *mode)
1315 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1320 PerlIO_open(const char *path, const char *mode)
1323 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1324 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1327 #undef PerlIO_reopen
1329 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1332 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1333 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1338 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1341 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1343 SETERRNO(EBADF, SS$_IVCHAN);
1348 #undef PerlIO_unread
1350 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1353 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1355 SETERRNO(EBADF, SS$_IVCHAN);
1362 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1365 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1367 SETERRNO(EBADF, SS$_IVCHAN);
1374 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1377 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1379 SETERRNO(EBADF, SS$_IVCHAN);
1386 PerlIO_tell(PerlIO *f)
1389 return (*PerlIOBase(f)->tab->Tell) (f);
1391 SETERRNO(EBADF, SS$_IVCHAN);
1398 PerlIO_flush(PerlIO *f)
1402 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1403 if (tab && tab->Flush) {
1404 return (*tab->Flush) (f);
1407 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1408 SETERRNO(EBADF, SS$_IVCHAN);
1413 PerlIO_debug("Cannot flush f=%p\n", f);
1414 SETERRNO(EBADF, SS$_IVCHAN);
1420 * Is it good API design to do flush-all on NULL, a potentially
1421 * errorneous input? Maybe some magical value (PerlIO*
1422 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1423 * things on fflush(NULL), but should we be bound by their design
1427 PerlIO **table = &PL_perlio;
1429 while ((f = *table)) {
1431 table = (PerlIO **) (f++);
1432 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1433 if (*f && PerlIO_flush(f) != 0)
1443 PerlIOBase_flush_linebuf()
1446 PerlIO **table = &PL_perlio;
1448 while ((f = *table)) {
1450 table = (PerlIO **) (f++);
1451 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1454 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1455 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1464 PerlIO_fill(PerlIO *f)
1467 return (*PerlIOBase(f)->tab->Fill) (f);
1469 SETERRNO(EBADF, SS$_IVCHAN);
1474 #undef PerlIO_isutf8
1476 PerlIO_isutf8(PerlIO *f)
1479 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1481 SETERRNO(EBADF, SS$_IVCHAN);
1488 PerlIO_eof(PerlIO *f)
1491 return (*PerlIOBase(f)->tab->Eof) (f);
1493 SETERRNO(EBADF, SS$_IVCHAN);
1500 PerlIO_error(PerlIO *f)
1503 return (*PerlIOBase(f)->tab->Error) (f);
1505 SETERRNO(EBADF, SS$_IVCHAN);
1510 #undef PerlIO_clearerr
1512 PerlIO_clearerr(PerlIO *f)
1515 (*PerlIOBase(f)->tab->Clearerr) (f);
1517 SETERRNO(EBADF, SS$_IVCHAN);
1520 #undef PerlIO_setlinebuf
1522 PerlIO_setlinebuf(PerlIO *f)
1525 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1527 SETERRNO(EBADF, SS$_IVCHAN);
1530 #undef PerlIO_has_base
1532 PerlIO_has_base(PerlIO *f)
1535 return (PerlIOBase(f)->tab->Get_base != NULL);
1540 #undef PerlIO_fast_gets
1542 PerlIO_fast_gets(PerlIO *f)
1544 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1545 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1546 return (tab->Set_ptrcnt != NULL);
1551 #undef PerlIO_has_cntptr
1553 PerlIO_has_cntptr(PerlIO *f)
1556 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1557 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1562 #undef PerlIO_canset_cnt
1564 PerlIO_canset_cnt(PerlIO *f)
1567 PerlIOl *l = PerlIOBase(f);
1568 return (l->tab->Set_ptrcnt != NULL);
1573 #undef PerlIO_get_base
1575 PerlIO_get_base(PerlIO *f)
1578 return (*PerlIOBase(f)->tab->Get_base) (f);
1582 #undef PerlIO_get_bufsiz
1584 PerlIO_get_bufsiz(PerlIO *f)
1587 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1591 #undef PerlIO_get_ptr
1593 PerlIO_get_ptr(PerlIO *f)
1595 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1596 if (tab->Get_ptr == NULL)
1598 return (*tab->Get_ptr) (f);
1601 #undef PerlIO_get_cnt
1603 PerlIO_get_cnt(PerlIO *f)
1605 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1606 if (tab->Get_cnt == NULL)
1608 return (*tab->Get_cnt) (f);
1611 #undef PerlIO_set_cnt
1613 PerlIO_set_cnt(PerlIO *f, int cnt)
1615 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1618 #undef PerlIO_set_ptrcnt
1620 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1622 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1623 if (tab->Set_ptrcnt == NULL) {
1625 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1627 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1630 /*--------------------------------------------------------------------------------------*/
1632 * utf8 and raw dummy layers
1636 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1638 if (PerlIONext(f)) {
1640 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1641 PerlIO_pop(aTHX_ f);
1642 if (tab->kind & PERLIO_K_UTF8)
1643 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1645 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1651 PerlIO_funcs PerlIO_utf8 = {
1654 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1672 NULL, /* get_base */
1673 NULL, /* get_bufsiz */
1676 NULL, /* set_ptrcnt */
1679 PerlIO_funcs PerlIO_byte = {
1700 NULL, /* get_base */
1701 NULL, /* get_bufsiz */
1704 NULL, /* set_ptrcnt */
1708 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1709 IV n, const char *mode, int fd, int imode, int perm,
1710 PerlIO *old, int narg, SV **args)
1712 PerlIO_funcs *tab = PerlIO_default_btm();
1713 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1717 PerlIO_funcs PerlIO_raw = {
1738 NULL, /* get_base */
1739 NULL, /* get_bufsiz */
1742 NULL, /* set_ptrcnt */
1744 /*--------------------------------------------------------------------------------------*/
1745 /*--------------------------------------------------------------------------------------*/
1747 * "Methods" of the "base class"
1751 PerlIOBase_fileno(PerlIO *f)
1753 return PerlIO_fileno(PerlIONext(f));
1757 PerlIO_modestr(PerlIO *f, char *buf)
1760 IV flags = PerlIOBase(f)->flags;
1761 if (flags & PERLIO_F_APPEND) {
1763 if (flags & PERLIO_F_CANREAD) {
1767 else if (flags & PERLIO_F_CANREAD) {
1769 if (flags & PERLIO_F_CANWRITE)
1772 else if (flags & PERLIO_F_CANWRITE) {
1774 if (flags & PERLIO_F_CANREAD) {
1778 #if O_TEXT != O_BINARY
1779 if (!(flags & PERLIO_F_CRLF))
1787 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1789 PerlIOl *l = PerlIOBase(f);
1791 const char *omode = mode;
1794 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1795 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1796 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1797 if (tab->Set_ptrcnt != NULL)
1798 l->flags |= PERLIO_F_FASTGETS;
1800 if (*mode == '#' || *mode == 'I')
1804 l->flags |= PERLIO_F_CANREAD;
1807 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1810 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1813 SETERRNO(EINVAL, LIB$_INVARG);
1819 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1822 l->flags &= ~PERLIO_F_CRLF;
1825 l->flags |= PERLIO_F_CRLF;
1828 SETERRNO(EINVAL, LIB$_INVARG);
1835 l->flags |= l->next->flags &
1836 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1841 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1842 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1843 l->flags, PerlIO_modestr(f, temp));
1849 PerlIOBase_popped(PerlIO *f)
1855 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1859 * Save the position as current head considers it
1861 Off_t old = PerlIO_tell(f);
1863 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1864 PerlIOSelf(f, PerlIOBuf)->posn = old;
1865 done = PerlIOBuf_unread(f, vbuf, count);
1870 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1872 STDCHAR *buf = (STDCHAR *) vbuf;
1874 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1877 SSize_t avail = PerlIO_get_cnt(f);
1880 take = (count < avail) ? count : avail;
1882 STDCHAR *ptr = PerlIO_get_ptr(f);
1883 Copy(ptr, buf, take, STDCHAR);
1884 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1888 if (count > 0 && avail <= 0) {
1889 if (PerlIO_fill(f) != 0)
1893 return (buf - (STDCHAR *) vbuf);
1899 PerlIOBase_noop_ok(PerlIO *f)
1905 PerlIOBase_noop_fail(PerlIO *f)
1911 PerlIOBase_close(PerlIO *f)
1914 PerlIO *n = PerlIONext(f);
1915 if (PerlIO_flush(f) != 0)
1917 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1919 PerlIOBase(f)->flags &=
1920 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1925 PerlIOBase_eof(PerlIO *f)
1928 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1934 PerlIOBase_error(PerlIO *f)
1937 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1943 PerlIOBase_clearerr(PerlIO *f)
1946 PerlIO *n = PerlIONext(f);
1947 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1954 PerlIOBase_setlinebuf(PerlIO *f)
1957 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1962 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1968 return sv_dup(arg, param);
1971 return newSVsv(arg);
1974 return newSVsv(arg);
1979 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1981 PerlIO *nexto = PerlIONext(o);
1983 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1984 f = (*tab->Dup)(aTHX_ f, nexto, param);
1987 PerlIO_funcs *self = PerlIOBase(o)->tab;
1990 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1992 arg = (*self->Getarg)(o);
1994 arg = PerlIO_sv_dup(aTHX_ arg, param);
1997 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2005 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2007 perl_mutex PerlIO_mutex;
2009 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2014 /* Place holder for stdstreams call ??? */
2016 MUTEX_INIT(&PerlIO_mutex);
2021 PerlIOUnix_refcnt_inc(int fd)
2023 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2025 MUTEX_LOCK(&PerlIO_mutex);
2027 PerlIO_fd_refcnt[fd]++;
2028 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2030 MUTEX_UNLOCK(&PerlIO_mutex);
2036 PerlIOUnix_refcnt_dec(int fd)
2039 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2041 MUTEX_LOCK(&PerlIO_mutex);
2043 cnt = --PerlIO_fd_refcnt[fd];
2044 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2046 MUTEX_UNLOCK(&PerlIO_mutex);
2053 PerlIO_cleanup(pTHX)
2057 PerlIO_debug("Cleanup %p\n",aTHX);
2059 /* Raise STDIN..STDERR refcount so we don't close them */
2060 for (i=0; i < 3; i++)
2061 PerlIOUnix_refcnt_inc(i);
2062 PerlIO_cleantable(aTHX_ &PL_perlio);
2063 /* Restore STDIN..STDERR refcount */
2064 for (i=0; i < 3; i++)
2065 PerlIOUnix_refcnt_dec(i);
2070 /*--------------------------------------------------------------------------------------*/
2072 * Bottom-most level for UNIX-like case
2076 struct _PerlIO base; /* The generic part */
2077 int fd; /* UNIX like file descriptor */
2078 int oflags; /* open/fcntl flags */
2082 PerlIOUnix_oflags(const char *mode)
2085 if (*mode == 'I' || *mode == '#')
2090 if (*++mode == '+') {
2097 oflags = O_CREAT | O_TRUNC;
2098 if (*++mode == '+') {
2107 oflags = O_CREAT | O_APPEND;
2108 if (*++mode == '+') {
2121 else if (*mode == 't') {
2123 oflags &= ~O_BINARY;
2127 * Always open in binary mode
2130 if (*mode || oflags == -1) {
2131 SETERRNO(EINVAL, LIB$_INVARG);
2138 PerlIOUnix_fileno(PerlIO *f)
2140 return PerlIOSelf(f, PerlIOUnix)->fd;
2144 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2146 IV code = PerlIOBase_pushed(f, mode, arg);
2147 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2148 if (*PerlIONext(f)) {
2149 s->fd = PerlIO_fileno(PerlIONext(f));
2151 * XXX could (or should) we retrieve the oflags from the open file
2152 * handle rather than believing the "mode" we are passed in? XXX
2153 * Should the value on NULL mode be 0 or -1?
2155 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2157 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2162 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2163 IV n, const char *mode, int fd, int imode,
2164 int perm, PerlIO *f, int narg, SV **args)
2167 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2168 (*PerlIOBase(f)->tab->Close) (f);
2171 char *path = SvPV_nolen(*args);
2175 imode = PerlIOUnix_oflags(mode);
2179 fd = PerlLIO_open3(path, imode, perm);
2187 f = PerlIO_allocate(aTHX);
2188 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2192 s = PerlIOSelf(f, PerlIOUnix);
2195 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2196 PerlIOUnix_refcnt_inc(fd);
2202 * FIXME: pop layers ???
2210 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2212 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2214 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2215 f = PerlIOBase_dup(aTHX_ f, o, param);
2217 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2218 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2220 PerlIOUnix_refcnt_inc(fd);
2229 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2232 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2233 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2236 SSize_t len = PerlLIO_read(fd, vbuf, count);
2237 if (len >= 0 || errno != EINTR) {
2239 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2240 else if (len == 0 && count != 0)
2241 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2249 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2252 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2254 SSize_t len = PerlLIO_write(fd, vbuf, count);
2255 if (len >= 0 || errno != EINTR) {
2257 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2265 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2269 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2270 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2271 return (new == (Off_t) - 1) ? -1 : 0;
2275 PerlIOUnix_tell(PerlIO *f)
2278 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2283 PerlIOUnix_close(PerlIO *f)
2286 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2288 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2289 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2290 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2295 SETERRNO(EBADF,SS$_IVCHAN);
2298 while (PerlLIO_close(fd) != 0) {
2299 if (errno != EINTR) {
2306 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2311 PerlIO_funcs PerlIO_unix = {
2327 PerlIOBase_noop_ok, /* flush */
2328 PerlIOBase_noop_fail, /* fill */
2331 PerlIOBase_clearerr,
2332 PerlIOBase_setlinebuf,
2333 NULL, /* get_base */
2334 NULL, /* get_bufsiz */
2337 NULL, /* set_ptrcnt */
2340 /*--------------------------------------------------------------------------------------*/
2346 struct _PerlIO base;
2347 FILE *stdio; /* The stream */
2351 PerlIOStdio_fileno(PerlIO *f)
2354 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2358 PerlIOStdio_mode(const char *mode, char *tmode)
2364 if (O_BINARY != O_TEXT) {
2372 * This isn't used yet ...
2375 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2377 if (*PerlIONext(f)) {
2379 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2382 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2383 PerlIOStdio_mode(mode, tmode));
2389 return PerlIOBase_pushed(f, mode, arg);
2392 #undef PerlIO_importFILE
2394 PerlIO_importFILE(FILE *stdio, int fl)
2400 PerlIOSelf(PerlIO_push
2401 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2402 "r+", Nullsv), PerlIOStdio);
2409 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2410 IV n, const char *mode, int fd, int imode,
2411 int perm, PerlIO *f, int narg, SV **args)
2415 char *path = SvPV_nolen(*args);
2416 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2418 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2419 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2424 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2429 char *path = SvPV_nolen(*args);
2432 fd = PerlLIO_open3(path, imode, perm);
2435 FILE *stdio = PerlSIO_fopen(path, mode);
2438 PerlIOSelf(PerlIO_push
2439 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2440 (mode = PerlIOStdio_mode(mode, tmode)),
2444 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2459 stdio = PerlSIO_stdin;
2462 stdio = PerlSIO_stdout;
2465 stdio = PerlSIO_stderr;
2470 stdio = PerlSIO_fdopen(fd, mode =
2471 PerlIOStdio_mode(mode, tmode));
2475 PerlIOSelf(PerlIO_push
2476 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2477 mode, PerlIOArg), PerlIOStdio);
2479 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2488 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2490 /* This assumes no layers underneath - which is what
2491 happens, but is not how I remember it. NI-S 2001/10/16
2493 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2494 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2495 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2496 PerlIOUnix_refcnt_inc(fileno(stdio));
2502 PerlIOStdio_close(PerlIO *f)
2505 #ifdef SOCKS5_VERSION_NAME
2507 Sock_size_t optlen = sizeof(int);
2509 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2510 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2511 /* Do not close it but do flush any buffers */
2516 #ifdef SOCKS5_VERSION_NAME
2518 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2520 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2522 PerlSIO_fclose(stdio)
2531 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2534 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2537 STDCHAR *buf = (STDCHAR *) vbuf;
2539 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2540 * stdio does not do that for fread()
2542 int ch = PerlSIO_fgetc(s);
2549 got = PerlSIO_fread(vbuf, 1, count, s);
2554 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2557 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2558 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2561 int ch = *buf-- & 0xff;
2562 if (PerlSIO_ungetc(ch, s) != ch)
2571 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2574 return PerlSIO_fwrite(vbuf, 1, count,
2575 PerlIOSelf(f, PerlIOStdio)->stdio);
2579 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2582 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2583 return PerlSIO_fseek(stdio, offset, whence);
2587 PerlIOStdio_tell(PerlIO *f)
2590 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2591 return PerlSIO_ftell(stdio);
2595 PerlIOStdio_flush(PerlIO *f)
2598 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2599 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2600 return PerlSIO_fflush(stdio);
2605 * FIXME: This discards ungetc() and pre-read stuff which is not
2606 * right if this is just a "sync" from a layer above Suspect right
2607 * design is to do _this_ but not have layer above flush this
2608 * layer read-to-read
2611 * Not writeable - sync by attempting a seek
2614 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2622 PerlIOStdio_fill(PerlIO *f)
2625 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2628 * fflush()ing read-only streams can cause trouble on some stdio-s
2630 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2631 if (PerlSIO_fflush(stdio) != 0)
2634 c = PerlSIO_fgetc(stdio);
2635 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2641 PerlIOStdio_eof(PerlIO *f)
2644 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2648 PerlIOStdio_error(PerlIO *f)
2651 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2655 PerlIOStdio_clearerr(PerlIO *f)
2658 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2662 PerlIOStdio_setlinebuf(PerlIO *f)
2665 #ifdef HAS_SETLINEBUF
2666 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2668 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2674 PerlIOStdio_get_base(PerlIO *f)
2677 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2678 return PerlSIO_get_base(stdio);
2682 PerlIOStdio_get_bufsiz(PerlIO *f)
2685 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2686 return PerlSIO_get_bufsiz(stdio);
2690 #ifdef USE_STDIO_PTR
2692 PerlIOStdio_get_ptr(PerlIO *f)
2695 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2696 return PerlSIO_get_ptr(stdio);
2700 PerlIOStdio_get_cnt(PerlIO *f)
2703 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2704 return PerlSIO_get_cnt(stdio);
2708 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2710 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2713 #ifdef STDIO_PTR_LVALUE
2714 PerlSIO_set_ptr(stdio, ptr);
2715 #ifdef STDIO_PTR_LVAL_SETS_CNT
2716 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2718 assert(PerlSIO_get_cnt(stdio) == (cnt));
2721 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2723 * Setting ptr _does_ change cnt - we are done
2727 #else /* STDIO_PTR_LVALUE */
2729 #endif /* STDIO_PTR_LVALUE */
2732 * Now (or only) set cnt
2734 #ifdef STDIO_CNT_LVALUE
2735 PerlSIO_set_cnt(stdio, cnt);
2736 #else /* STDIO_CNT_LVALUE */
2737 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2738 PerlSIO_set_ptr(stdio,
2739 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2741 #else /* STDIO_PTR_LVAL_SETS_CNT */
2743 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2744 #endif /* STDIO_CNT_LVALUE */
2749 PerlIO_funcs PerlIO_stdio = {
2751 sizeof(PerlIOStdio),
2769 PerlIOStdio_clearerr,
2770 PerlIOStdio_setlinebuf,
2772 PerlIOStdio_get_base,
2773 PerlIOStdio_get_bufsiz,
2778 #ifdef USE_STDIO_PTR
2779 PerlIOStdio_get_ptr,
2780 PerlIOStdio_get_cnt,
2781 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2782 PerlIOStdio_set_ptrcnt
2783 #else /* STDIO_PTR_LVALUE */
2785 #endif /* STDIO_PTR_LVALUE */
2786 #else /* USE_STDIO_PTR */
2790 #endif /* USE_STDIO_PTR */
2793 #undef PerlIO_exportFILE
2795 PerlIO_exportFILE(PerlIO *f, int fl)
2799 stdio = fdopen(PerlIO_fileno(f), "r+");
2803 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2810 #undef PerlIO_findFILE
2812 PerlIO_findFILE(PerlIO *f)
2816 if (l->tab == &PerlIO_stdio) {
2817 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2820 l = *PerlIONext(&l);
2822 return PerlIO_exportFILE(f, 0);
2825 #undef PerlIO_releaseFILE
2827 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2831 /*--------------------------------------------------------------------------------------*/
2833 * perlio buffer layer
2837 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2840 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2841 int fd = PerlIO_fileno(f);
2843 if (fd >= 0 && PerlLIO_isatty(fd)) {
2844 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2846 posn = PerlIO_tell(PerlIONext(f));
2847 if (posn != (Off_t) - 1) {
2850 return PerlIOBase_pushed(f, mode, arg);
2854 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2855 IV n, const char *mode, int fd, int imode, int perm,
2856 PerlIO *f, int narg, SV **args)
2859 PerlIO *next = PerlIONext(f);
2861 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2863 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2866 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2872 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2880 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2883 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2885 * if push fails during open, open fails. close will pop us.
2890 fd = PerlIO_fileno(f);
2891 #if (O_BINARY != O_TEXT) && !defined(__BEOS__)
2893 * do something about failing setmode()? --jhi
2895 PerlLIO_setmode(fd, O_BINARY);
2897 if (init && fd == 2) {
2899 * Initial stderr is unbuffered
2901 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2910 * This "flush" is akin to sfio's sync in that it handles files in either
2911 * read or write state
2914 PerlIOBuf_flush(PerlIO *f)
2916 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2918 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2920 * write() the buffer
2922 STDCHAR *buf = b->buf;
2924 PerlIO *n = PerlIONext(f);
2925 while (p < b->ptr) {
2926 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2930 else if (count < 0 || PerlIO_error(n)) {
2931 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2936 b->posn += (p - buf);
2938 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2939 STDCHAR *buf = PerlIO_get_base(f);
2941 * Note position change
2943 b->posn += (b->ptr - buf);
2944 if (b->ptr < b->end) {
2946 * We did not consume all of it
2948 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2949 b->posn = PerlIO_tell(PerlIONext(f));
2953 b->ptr = b->end = b->buf;
2954 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2956 * FIXME: Is this right for read case ?
2958 if (PerlIO_flush(PerlIONext(f)) != 0)
2964 PerlIOBuf_fill(PerlIO *f)
2966 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2967 PerlIO *n = PerlIONext(f);
2970 * FIXME: doing the down-stream flush is a bad idea if it causes
2971 * pre-read data in stdio buffer to be discarded but this is too
2972 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2973 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2975 if (PerlIO_flush(f) != 0)
2977 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2978 PerlIOBase_flush_linebuf();
2981 PerlIO_get_base(f); /* allocate via vtable */
2983 b->ptr = b->end = b->buf;
2984 if (PerlIO_fast_gets(n)) {
2986 * Layer below is also buffered We do _NOT_ want to call its
2987 * ->Read() because that will loop till it gets what we asked for
2988 * which may hang on a pipe etc. Instead take anything it has to
2989 * hand, or ask it to fill _once_.
2991 avail = PerlIO_get_cnt(n);
2993 avail = PerlIO_fill(n);
2995 avail = PerlIO_get_cnt(n);
2997 if (!PerlIO_error(n) && PerlIO_eof(n))
3002 STDCHAR *ptr = PerlIO_get_ptr(n);
3003 SSize_t cnt = avail;
3004 if (avail > b->bufsiz)
3006 Copy(ptr, b->buf, avail, STDCHAR);
3007 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3011 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3015 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3017 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3020 b->end = b->buf + avail;
3021 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3026 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3032 return PerlIOBase_read(f, vbuf, count);
3038 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3040 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3041 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3044 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3049 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3051 * Buffer is already a read buffer, we can overwrite any chars
3052 * which have been read back to buffer start
3054 avail = (b->ptr - b->buf);
3058 * Buffer is idle, set it up so whole buffer is available for
3062 b->end = b->buf + avail;
3064 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3066 * Buffer extends _back_ from where we are now
3068 b->posn -= b->bufsiz;
3070 if (avail > (SSize_t) count) {
3072 * If we have space for more than count, just move count
3080 * In simple stdio-like ungetc() case chars will be already
3083 if (buf != b->ptr) {
3084 Copy(buf, b->ptr, avail, STDCHAR);
3088 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3095 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3097 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3098 const STDCHAR *buf = (const STDCHAR *) vbuf;
3102 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3105 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3106 if ((SSize_t) count < avail)
3108 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3109 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3124 Copy(buf, b->ptr, avail, STDCHAR);
3131 if (b->ptr >= (b->buf + b->bufsiz))
3134 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3140 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3143 if ((code = PerlIO_flush(f)) == 0) {
3144 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3145 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3146 code = PerlIO_seek(PerlIONext(f), offset, whence);
3148 b->posn = PerlIO_tell(PerlIONext(f));
3155 PerlIOBuf_tell(PerlIO *f)
3157 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3159 * b->posn is file position where b->buf was read, or will be written
3161 Off_t posn = b->posn;
3164 * If buffer is valid adjust position by amount in buffer
3166 posn += (b->ptr - b->buf);
3172 PerlIOBuf_close(PerlIO *f)
3174 IV code = PerlIOBase_close(f);
3175 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3176 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3180 b->ptr = b->end = b->buf;
3181 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3186 PerlIOBuf_get_ptr(PerlIO *f)
3188 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3195 PerlIOBuf_get_cnt(PerlIO *f)
3197 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3200 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3201 return (b->end - b->ptr);
3206 PerlIOBuf_get_base(PerlIO *f)
3208 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3213 Newz('B',b->buf,b->bufsiz, STDCHAR);
3215 b->buf = (STDCHAR *) & b->oneword;
3216 b->bufsiz = sizeof(b->oneword);
3225 PerlIOBuf_bufsiz(PerlIO *f)
3227 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3230 return (b->end - b->buf);
3234 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3236 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3240 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3242 assert(PerlIO_get_cnt(f) == cnt);
3243 assert(b->ptr >= b->buf);
3245 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3249 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3251 return PerlIOBase_dup(aTHX_ f, o, param);
3256 PerlIO_funcs PerlIO_perlio = {
3276 PerlIOBase_clearerr,
3277 PerlIOBase_setlinebuf,
3282 PerlIOBuf_set_ptrcnt,
3285 /*--------------------------------------------------------------------------------------*/
3287 * Temp layer to hold unread chars when cannot do it any other way
3291 PerlIOPending_fill(PerlIO *f)
3294 * Should never happen
3301 PerlIOPending_close(PerlIO *f)
3304 * A tad tricky - flush pops us, then we close new top
3307 return PerlIO_close(f);
3311 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3314 * A tad tricky - flush pops us, then we seek new top
3317 return PerlIO_seek(f, offset, whence);
3322 PerlIOPending_flush(PerlIO *f)
3325 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3326 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3330 PerlIO_pop(aTHX_ f);
3335 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3341 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3346 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3348 IV code = PerlIOBase_pushed(f, mode, arg);
3349 PerlIOl *l = PerlIOBase(f);
3351 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3352 * etc. get muddled when it changes mid-string when we auto-pop.
3354 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3355 (PerlIOBase(PerlIONext(f))->
3356 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3361 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3363 SSize_t avail = PerlIO_get_cnt(f);
3368 got = PerlIOBuf_read(f, vbuf, avail);
3369 if (got >= 0 && got < count) {
3371 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3372 if (more >= 0 || got == 0)
3378 PerlIO_funcs PerlIO_pending = {
3382 PerlIOPending_pushed,
3393 PerlIOPending_close,
3394 PerlIOPending_flush,
3398 PerlIOBase_clearerr,
3399 PerlIOBase_setlinebuf,
3404 PerlIOPending_set_ptrcnt,
3409 /*--------------------------------------------------------------------------------------*/
3411 * crlf - translation On read translate CR,LF to "\n" we do this by
3412 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3413 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3417 PerlIOBuf base; /* PerlIOBuf stuff */
3418 STDCHAR *nl; /* Position of crlf we "lied" about in the
3423 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3426 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3427 code = PerlIOBuf_pushed(f, mode, arg);
3429 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3430 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3431 PerlIOBase(f)->flags);
3438 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3440 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3445 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3446 return PerlIOBuf_unread(f, vbuf, count);
3448 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3449 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3451 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3456 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3457 b->end = b->ptr = b->buf + b->bufsiz;
3458 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3459 b->posn -= b->bufsiz;
3461 while (count > 0 && b->ptr > b->buf) {
3464 if (b->ptr - 2 >= b->buf) {
3487 PerlIOCrlf_get_cnt(PerlIO *f)
3489 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3492 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3493 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3494 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3495 STDCHAR *nl = b->ptr;
3497 while (nl < b->end && *nl != 0xd)
3499 if (nl < b->end && *nl == 0xd) {
3501 if (nl + 1 < b->end) {
3508 * Not CR,LF but just CR
3516 * Blast - found CR as last char in buffer
3520 * They may not care, defer work as long as
3523 return (nl - b->ptr);
3527 b->ptr++; /* say we have read it as far as
3528 * flush() is concerned */
3529 b->buf++; /* Leave space in front of buffer */
3530 b->bufsiz--; /* Buffer is thus smaller */
3531 code = PerlIO_fill(f); /* Fetch some more */
3532 b->bufsiz++; /* Restore size for next time */
3533 b->buf--; /* Point at space */
3534 b->ptr = nl = b->buf; /* Which is what we hand
3536 b->posn--; /* Buffer starts here */
3537 *nl = 0xd; /* Fill in the CR */
3539 goto test; /* fill() call worked */
3541 * CR at EOF - just fall through
3547 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3553 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3555 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3556 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3557 IV flags = PerlIOBase(f)->flags;
3565 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3572 * Test code - delete when it works ...
3579 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3586 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3587 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3594 * They have taken what we lied about
3602 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3606 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3608 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3609 return PerlIOBuf_write(f, vbuf, count);
3611 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3612 const STDCHAR *buf = (const STDCHAR *) vbuf;
3613 const STDCHAR *ebuf = buf + count;
3616 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3618 while (buf < ebuf) {
3619 STDCHAR *eptr = b->buf + b->bufsiz;
3620 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3621 while (buf < ebuf && b->ptr < eptr) {
3623 if ((b->ptr + 2) > eptr) {
3631 *(b->ptr)++ = 0xd; /* CR */
3632 *(b->ptr)++ = 0xa; /* LF */
3634 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3644 if (b->ptr >= eptr) {
3650 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3652 return (buf - (STDCHAR *) vbuf);
3657 PerlIOCrlf_flush(PerlIO *f)
3659 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3664 return PerlIOBuf_flush(f);
3667 PerlIO_funcs PerlIO_crlf = {
3670 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3672 PerlIOBase_noop_ok, /* popped */
3677 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3679 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3680 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3688 PerlIOBase_clearerr,
3689 PerlIOBase_setlinebuf,
3694 PerlIOCrlf_set_ptrcnt,
3698 /*--------------------------------------------------------------------------------------*/
3700 * mmap as "buffer" layer
3704 PerlIOBuf base; /* PerlIOBuf stuff */
3705 Mmap_t mptr; /* Mapped address */
3706 Size_t len; /* mapped length */
3707 STDCHAR *bbuf; /* malloced buffer if map fails */
3710 static size_t page_size = 0;
3713 PerlIOMmap_map(PerlIO *f)
3716 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3717 IV flags = PerlIOBase(f)->flags;
3721 if (flags & PERLIO_F_CANREAD) {
3722 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3723 int fd = PerlIO_fileno(f);
3725 code = Fstat(fd, &st);
3726 if (code == 0 && S_ISREG(st.st_mode)) {
3727 SSize_t len = st.st_size - b->posn;
3731 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3733 SETERRNO(0, SS$_NORMAL);
3734 # ifdef _SC_PAGESIZE
3735 page_size = sysconf(_SC_PAGESIZE);
3737 page_size = sysconf(_SC_PAGE_SIZE);
3739 if ((long) page_size < 0) {
3744 (void) SvUPGRADE(error, SVt_PV);
3745 msg = SvPVx(error, n_a);
3746 Perl_croak(aTHX_ "panic: sysconf: %s",
3751 "panic: sysconf: pagesize unknown");
3755 # ifdef HAS_GETPAGESIZE
3756 page_size = getpagesize();
3758 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3759 page_size = PAGESIZE; /* compiletime, bad */
3763 if ((IV) page_size <= 0)
3764 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3769 * This is a hack - should never happen - open should
3772 b->posn = PerlIO_tell(PerlIONext(f));
3774 posn = (b->posn / page_size) * page_size;
3775 len = st.st_size - posn;
3776 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3777 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3778 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3779 madvise(m->mptr, len, MADV_SEQUENTIAL);
3781 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3782 madvise(m->mptr, len, MADV_WILLNEED);
3784 PerlIOBase(f)->flags =
3785 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3786 b->end = ((STDCHAR *) m->mptr) + len;
3787 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3796 PerlIOBase(f)->flags =
3797 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3799 b->ptr = b->end = b->ptr;
3808 PerlIOMmap_unmap(PerlIO *f)
3810 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3811 PerlIOBuf *b = &m->base;
3815 code = munmap(m->mptr, m->len);
3819 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3822 b->ptr = b->end = b->buf;
3823 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3829 PerlIOMmap_get_base(PerlIO *f)
3831 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3832 PerlIOBuf *b = &m->base;
3833 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3835 * Already have a readbuffer in progress
3841 * We have a write buffer or flushed PerlIOBuf read buffer
3843 m->bbuf = b->buf; /* save it in case we need it again */
3844 b->buf = NULL; /* Clear to trigger below */
3847 PerlIOMmap_map(f); /* Try and map it */
3850 * Map did not work - recover PerlIOBuf buffer if we have one
3855 b->ptr = b->end = b->buf;
3858 return PerlIOBuf_get_base(f);
3862 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3864 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3865 PerlIOBuf *b = &m->base;
3866 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3868 if (b->ptr && (b->ptr - count) >= b->buf
3869 && memEQ(b->ptr - count, vbuf, count)) {
3871 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3876 * Loose the unwritable mapped buffer
3880 * If flush took the "buffer" see if we have one from before
3882 if (!b->buf && m->bbuf)
3885 PerlIOBuf_get_base(f);
3889 return PerlIOBuf_unread(f, vbuf, count);
3893 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3895 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3896 PerlIOBuf *b = &m->base;
3897 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3899 * No, or wrong sort of, buffer
3902 if (PerlIOMmap_unmap(f) != 0)
3906 * If unmap took the "buffer" see if we have one from before
3908 if (!b->buf && m->bbuf)
3911 PerlIOBuf_get_base(f);
3915 return PerlIOBuf_write(f, vbuf, count);
3919 PerlIOMmap_flush(PerlIO *f)
3921 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3922 PerlIOBuf *b = &m->base;
3923 IV code = PerlIOBuf_flush(f);
3925 * Now we are "synced" at PerlIOBuf level
3932 if (PerlIOMmap_unmap(f) != 0)
3937 * We seem to have a PerlIOBuf buffer which was not mapped
3938 * remember it in case we need one later
3947 PerlIOMmap_fill(PerlIO *f)
3949 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3950 IV code = PerlIO_flush(f);
3951 if (code == 0 && !b->buf) {
3952 code = PerlIOMmap_map(f);
3954 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3955 code = PerlIOBuf_fill(f);
3961 PerlIOMmap_close(PerlIO *f)
3963 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3964 PerlIOBuf *b = &m->base;
3965 IV code = PerlIO_flush(f);
3969 b->ptr = b->end = b->buf;
3971 if (PerlIOBuf_close(f) != 0)
3977 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3979 return PerlIOBase_dup(aTHX_ f, o, param);
3983 PerlIO_funcs PerlIO_mmap = {
4003 PerlIOBase_clearerr,
4004 PerlIOBase_setlinebuf,
4005 PerlIOMmap_get_base,
4009 PerlIOBuf_set_ptrcnt,
4012 #endif /* HAS_MMAP */
4020 PerlIO_stdstreams(aTHX);
4022 return &PL_perlio[1];
4025 #undef PerlIO_stdout
4031 PerlIO_stdstreams(aTHX);
4033 return &PL_perlio[2];
4036 #undef PerlIO_stderr
4042 PerlIO_stdstreams(aTHX);
4044 return &PL_perlio[3];
4047 /*--------------------------------------------------------------------------------------*/
4049 #undef PerlIO_getname
4051 PerlIO_getname(PerlIO *f, char *buf)
4056 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4058 name = fgetname(stdio, buf);
4060 Perl_croak(aTHX_ "Don't know how to get file name");
4066 /*--------------------------------------------------------------------------------------*/
4068 * Functions which can be called on any kind of PerlIO implemented in
4074 PerlIO_getc(PerlIO *f)
4077 SSize_t count = PerlIO_read(f, buf, 1);
4079 return (unsigned char) buf[0];
4084 #undef PerlIO_ungetc
4086 PerlIO_ungetc(PerlIO *f, int ch)
4090 if (PerlIO_unread(f, &buf, 1) == 1)
4098 PerlIO_putc(PerlIO *f, int ch)
4101 return PerlIO_write(f, &buf, 1);
4106 PerlIO_puts(PerlIO *f, const char *s)
4108 STRLEN len = strlen(s);
4109 return PerlIO_write(f, s, len);
4112 #undef PerlIO_rewind
4114 PerlIO_rewind(PerlIO *f)
4116 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4120 #undef PerlIO_vprintf
4122 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4125 SV *sv = newSVpvn("", 0);
4131 Perl_va_copy(ap, apc);
4132 sv_vcatpvf(sv, fmt, &apc);
4134 sv_vcatpvf(sv, fmt, &ap);
4137 wrote = PerlIO_write(f, s, len);
4142 #undef PerlIO_printf
4144 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4149 result = PerlIO_vprintf(f, fmt, ap);
4154 #undef PerlIO_stdoutf
4156 PerlIO_stdoutf(const char *fmt, ...)
4161 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4166 #undef PerlIO_tmpfile
4168 PerlIO_tmpfile(void)
4171 * I have no idea how portable mkstemp() is ...
4173 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4176 FILE *stdio = PerlSIO_tmpfile();
4179 PerlIOSelf(PerlIO_push
4180 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4181 "w+", Nullsv), PerlIOStdio);
4187 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4188 int fd = mkstemp(SvPVX(sv));
4191 f = PerlIO_fdopen(fd, "w+");
4193 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4195 PerlLIO_unlink(SvPVX(sv));
4205 #endif /* USE_SFIO */
4206 #endif /* PERLIO_IS_STDIO */
4208 /*======================================================================================*/
4210 * Now some functions in terms of above which may be needed even if we are
4211 * not in true PerlIO mode
4215 #undef PerlIO_setpos
4217 PerlIO_setpos(PerlIO *f, SV *pos)
4222 Off_t *posn = (Off_t *) SvPV(pos, len);
4223 if (f && len == sizeof(Off_t))
4224 return PerlIO_seek(f, *posn, SEEK_SET);
4226 SETERRNO(EINVAL, SS$_IVCHAN);
4230 #undef PerlIO_setpos
4232 PerlIO_setpos(PerlIO *f, SV *pos)
4237 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4238 if (f && len == sizeof(Fpos_t)) {
4239 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4240 return fsetpos64(f, fpos);
4242 return fsetpos(f, fpos);
4246 SETERRNO(EINVAL, SS$_IVCHAN);
4252 #undef PerlIO_getpos
4254 PerlIO_getpos(PerlIO *f, SV *pos)
4257 Off_t posn = PerlIO_tell(f);
4258 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4259 return (posn == (Off_t) - 1) ? -1 : 0;
4262 #undef PerlIO_getpos
4264 PerlIO_getpos(PerlIO *f, SV *pos)
4269 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4270 code = fgetpos64(f, &fpos);
4272 code = fgetpos(f, &fpos);
4274 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4279 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4282 vprintf(char *pat, char *args)
4284 _doprnt(pat, args, stdout);
4285 return 0; /* wrong, but perl doesn't use the return
4290 vfprintf(FILE *fd, char *pat, char *args)
4292 _doprnt(pat, args, fd);
4293 return 0; /* wrong, but perl doesn't use the return
4299 #ifndef PerlIO_vsprintf
4301 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4303 int val = vsprintf(s, fmt, ap);
4305 if (strlen(s) >= (STRLEN) n) {
4307 (void) PerlIO_puts(Perl_error_log,
4308 "panic: sprintf overflow - memory corrupted!\n");
4316 #ifndef PerlIO_sprintf
4318 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4323 result = PerlIO_vsprintf(s, n, fmt, ap);