2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
9 * at the dispatch tables, even when we do not need it for other reasons.
10 * Invent a dSYS macro to abstract this out
12 #ifdef PERL_IMPLICIT_SYS
25 #define PERLIO_NOT_STDIO 0
26 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 * This file provides those parts of PerlIO abstraction
33 * which are not #defined in perlio.h.
34 * Which these are depends on various Configure #ifdef's
38 #define PERL_IN_PERLIO_C
44 perlsio_binmode(FILE *fp, int iotype, int mode)
47 * This used to be contents of do_binmode in doio.c
50 # if defined(atarist) || defined(__MINT__)
53 ((FILE *) fp)->_flag |= _IOBIN;
55 ((FILE *) fp)->_flag &= ~_IOBIN;
62 if (PerlLIO_setmode(fp, mode) != -1) {
64 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
66 # if defined(WIN32) && defined(__BORLANDC__)
68 * The translation mode of the stream is maintained independent of
69 * the translation mode of the fd in the Borland RTL (heavy
70 * digging through their runtime sources reveal). User has to set
71 * the mode explicitly for the stream (though they don't document
72 * this anywhere). GSAR 97-5-24
86 # if defined(USEMYBINMODE)
87 if (my_binmode(fp, iotype, mode) != FALSE)
98 #define O_ACCMODE 3 /* Assume traditional implementation */
102 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
104 int result = rawmode & O_ACCMODE;
109 ptype = IoTYPE_RDONLY;
112 ptype = IoTYPE_WRONLY;
120 *writing = (result != O_RDONLY);
122 if (result == O_RDONLY) {
126 else if (rawmode & O_APPEND) {
128 if (result != O_WRONLY)
133 if (result == O_WRONLY)
140 if (rawmode & O_BINARY)
146 #ifndef PERLIO_LAYERS
148 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
150 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
153 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
161 PerlIO_destruct(pTHX)
166 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
171 return perlsio_binmode(fp, iotype, mode);
176 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
180 int fd = PerlLIO_dup(PerlIO_fileno(f));
183 int omode = fcntl(fd, F_GETFL);
184 PerlIO_intmode2str(omode,mode,NULL);
185 /* the r+ is a hack */
186 return PerlIO_fdopen(fd, mode);
191 SETERRNO(EBADF, SS$_IVCHAN);
199 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
203 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
204 int imode, int perm, PerlIO *old, int narg, SV **args)
207 if (*args == &PL_sv_undef)
208 return PerlIO_tmpfile();
210 char *name = SvPV_nolen(*args);
212 fd = PerlLIO_open3(name, imode, perm);
214 return PerlIO_fdopen(fd, (char *) mode + 1);
217 return PerlIO_reopen(name, mode, old);
220 return PerlIO_open(name, mode);
225 return PerlIO_fdopen(fd, (char *) mode);
230 XS(XS_PerlIO__Layer__find)
234 Perl_croak(aTHX_ "Usage class->find(name[,load])");
236 char *name = SvPV_nolen(ST(1));
237 ST(0) = (strEQ(name, "crlf")
238 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
245 Perl_boot_core_PerlIO(pTHX)
247 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
253 #ifdef PERLIO_IS_STDIO
259 * Does nothing (yet) except force this file to be included in perl
260 * binary. That allows this file to force inclusion of other functions
261 * that may be required by loadable extensions e.g. for
262 * FileHandle::tmpfile
266 #undef PerlIO_tmpfile
273 #else /* PERLIO_IS_STDIO */
281 * This section is just to make sure these functions get pulled in from
285 #undef PerlIO_tmpfile
296 * Force this file to be included in perl binary. Which allows this
297 * file to force inclusion of other functions that may be required by
298 * loadable extensions e.g. for FileHandle::tmpfile
302 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
303 * results in a lot of lseek()s to regular files and lot of small
306 sfset(sfstdout, SF_SHARE, 0);
310 PerlIO_importFILE(FILE *stdio, int fl)
312 int fd = fileno(stdio);
313 PerlIO *r = PerlIO_fdopen(fd, "r+");
318 PerlIO_findFILE(PerlIO *pio)
320 int fd = PerlIO_fileno(pio);
321 FILE *f = fdopen(fd, "r+");
323 if (!f && errno == EINVAL)
325 if (!f && errno == EINVAL)
332 /*======================================================================================*/
334 * Implement all the PerlIO interface ourselves.
340 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
347 #include <sys/mman.h>
351 void PerlIO_debug(const char *fmt, ...)
352 __attribute__ ((format(__printf__, 1, 2)));
355 PerlIO_debug(const char *fmt, ...)
362 char *s = PerlEnv_getenv("PERLIO_DEBUG");
364 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
371 /* Use fixed buffer as sv_catpvf etc. needs SVs */
375 s = CopFILE(PL_curcop);
378 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
379 len = strlen(buffer);
380 vsprintf(buffer+len, fmt, ap);
381 PerlLIO_write(dbg, buffer, strlen(buffer));
383 SV *sv = newSVpvn("", 0);
386 s = CopFILE(PL_curcop);
389 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
390 (IV) CopLINE(PL_curcop));
391 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
394 PerlLIO_write(dbg, s, len);
401 /*--------------------------------------------------------------------------------------*/
404 * Inner level routines
408 * Table of pointers to the PerlIO structs (malloc'ed)
410 #define PERLIO_TABLE_SIZE 64
413 PerlIO_allocate(pTHX)
416 * Find a free slot in the table, allocating new table as necessary
421 while ((f = *last)) {
423 last = (PerlIO **) (f);
424 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
430 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
438 #undef PerlIO_fdupopen
440 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
443 PerlIO_funcs *tab = PerlIOBase(f)->tab;
445 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
446 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
450 SETERRNO(EBADF, SS$_IVCHAN);
456 PerlIO_cleantable(pTHX_ PerlIO **tablep)
458 PerlIO *table = *tablep;
461 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
462 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
463 PerlIO *f = table + i;
475 PerlIO_list_alloc(pTHX)
478 Newz('L', list, 1, PerlIO_list_t);
484 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
487 if (--list->refcnt == 0) {
490 for (i = 0; i < list->cur; i++) {
491 if (list->array[i].arg)
492 SvREFCNT_dec(list->array[i].arg);
494 Safefree(list->array);
502 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
505 if (list->cur >= list->len) {
508 Renew(list->array, list->len, PerlIO_pair_t);
510 New('l', list->array, list->len, PerlIO_pair_t);
512 p = &(list->array[list->cur++]);
514 if ((p->arg = arg)) {
520 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
522 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
525 list = PerlIO_list_alloc(aTHX);
526 for (i=0; i < proto->cur; i++) {
528 if (proto->array[i].arg)
529 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
530 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
537 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
540 PerlIO **table = &proto->Iperlio;
543 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
544 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
545 PerlIO_allocate(aTHX); /* root slot is never used */
546 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
547 while ((f = *table)) {
549 table = (PerlIO **) (f++);
550 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
552 (void) fp_dup(f, 0, param);
561 PerlIO_destruct(pTHX)
563 PerlIO **table = &PL_perlio;
566 PerlIO_debug("Destruct %p\n",aTHX);
568 while ((f = *table)) {
570 table = (PerlIO **) (f++);
571 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
575 if (l->tab->kind & PERLIO_K_DESTRUCT) {
576 PerlIO_debug("Destruct popping %s\n", l->tab->name);
587 PerlIO_list_free(aTHX_ PL_known_layers);
588 PL_known_layers = NULL;
589 PerlIO_list_free(aTHX_ PL_def_layerlist);
590 PL_def_layerlist = NULL;
594 PerlIO_pop(pTHX_ PerlIO *f)
598 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
599 if (l->tab->Popped) {
601 * If popped returns non-zero do not free its layer structure
602 * it has either done so itself, or it is shared and still in
605 if ((*l->tab->Popped) (f) != 0)
613 /*--------------------------------------------------------------------------------------*/
615 * XS Interface for perl code
619 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
622 if ((SSize_t) len <= 0)
624 for (i = 0; i < PL_known_layers->cur; i++) {
625 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
626 if (memEQ(f->name, name, len)) {
627 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
631 if (load && PL_subname && PL_def_layerlist
632 && PL_def_layerlist->cur >= 2) {
633 SV *pkgsv = newSVpvn("PerlIO", 6);
634 SV *layer = newSVpvn(name, len);
637 * The two SVs are magically freed by load_module
639 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
641 return PerlIO_find_layer(aTHX_ name, len, 0);
643 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
647 #ifdef USE_ATTRIBUTES_FOR_PERLIO
650 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
653 IO *io = GvIOn((GV *) SvRV(sv));
654 PerlIO *ifp = IoIFP(io);
655 PerlIO *ofp = IoOFP(io);
656 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
662 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
665 IO *io = GvIOn((GV *) SvRV(sv));
666 PerlIO *ifp = IoIFP(io);
667 PerlIO *ofp = IoOFP(io);
668 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
674 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
676 Perl_warn(aTHX_ "clear %" SVf, sv);
681 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
683 Perl_warn(aTHX_ "free %" SVf, sv);
687 MGVTBL perlio_vtab = {
695 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
698 SV *sv = SvRV(ST(1));
703 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
705 mg = mg_find(sv, PERL_MAGIC_ext);
706 mg->mg_virtual = &perlio_vtab;
708 Perl_warn(aTHX_ "attrib %" SVf, sv);
709 for (i = 2; i < items; i++) {
711 const char *name = SvPV(ST(i), len);
712 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
714 av_push(av, SvREFCNT_inc(layer));
725 #endif /* USE_ATTIBUTES_FOR_PERLIO */
728 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
730 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
731 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
735 XS(XS_PerlIO__Layer__find)
739 Perl_croak(aTHX_ "Usage class->find(name[,load])");
742 char *name = SvPV(ST(1), len);
743 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
744 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
746 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
753 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
755 if (!PL_known_layers)
756 PL_known_layers = PerlIO_list_alloc(aTHX);
757 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
758 PerlIO_debug("define %s %p\n", tab->name, tab);
762 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
765 const char *s = names;
767 while (isSPACE(*s) || *s == ':')
772 const char *as = Nullch;
774 if (!isIDFIRST(*s)) {
776 * Message is consistent with how attribute lists are
777 * passed. Even though this means "foo : : bar" is
778 * seen as an invalid separator character.
780 char q = ((*s == '\'') ? '"' : '\'');
782 "perlio: invalid separator character %c%c%c in layer specification list",
788 } while (isALNUM(*e));
804 * It's a nul terminated string, not allowed
805 * to \ the terminating null. Anything other
806 * character is passed over.
817 "perlio: argument list not closed for layer \"%.*s\"",
829 PerlIO_funcs *layer =
830 PerlIO_find_layer(aTHX_ s, llen, 1);
832 PerlIO_list_push(aTHX_ av, layer,
838 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
851 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
853 PerlIO_funcs *tab = &PerlIO_perlio;
854 if (O_BINARY != O_TEXT) {
858 if (PerlIO_stdio.Set_ptrcnt) {
862 PerlIO_debug("Pushing %s\n", tab->name);
863 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
868 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
870 return av->array[n].arg;
874 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
876 if (n >= 0 && n < av->cur) {
877 PerlIO_debug("Layer %" IVdf " is %s\n", n,
878 av->array[n].funcs->name);
879 return av->array[n].funcs;
882 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
887 PerlIO_default_layers(pTHX)
889 if (!PL_def_layerlist) {
890 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
891 PerlIO_funcs *osLayer = &PerlIO_unix;
892 PL_def_layerlist = PerlIO_list_alloc(aTHX);
893 PerlIO_define_layer(aTHX_ & PerlIO_unix);
894 #if defined(WIN32) && !defined(UNDER_CE)
895 PerlIO_define_layer(aTHX_ & PerlIO_win32);
897 osLayer = &PerlIO_win32;
900 PerlIO_define_layer(aTHX_ & PerlIO_raw);
901 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
902 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
903 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
905 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
907 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
908 PerlIO_define_layer(aTHX_ & PerlIO_byte);
909 PerlIO_list_push(aTHX_ PL_def_layerlist,
910 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
913 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
916 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
919 if (PL_def_layerlist->cur < 2) {
920 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
922 return PL_def_layerlist;
926 Perl_boot_core_PerlIO(pTHX)
928 #ifdef USE_ATTRIBUTES_FOR_PERLIO
929 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
932 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
936 PerlIO_default_layer(pTHX_ I32 n)
938 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
941 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
944 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
945 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
948 PerlIO_stdstreams(pTHX)
951 PerlIO_allocate(aTHX);
952 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
953 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
954 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
959 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
962 Newc('L',l,tab->size,char,PerlIOl);
964 Zero(l, tab->size, char);
968 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
969 (mode) ? mode : "(Null)", arg);
970 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
979 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
992 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
995 * Remove the dummy layer
1000 * Pop back to bottom layer
1004 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1005 if (*PerlIONext(f)) {
1006 PerlIO_pop(aTHX_ f);
1010 * Nothing bellow - push unix on top then remove it
1012 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1013 PerlIO_pop(aTHX_ PerlIONext(f));
1018 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1025 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1026 PerlIO_list_t *layers, IV n)
1028 IV max = layers->cur;
1031 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1033 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1044 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1048 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1049 code = PerlIO_parse_layers(aTHX_ layers, names);
1051 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1053 PerlIO_list_free(aTHX_ layers);
1059 /*--------------------------------------------------------------------------------------*/
1061 * Given the abstraction above the public API functions
1065 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1067 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1068 f, PerlIOBase(f)->tab->name, iotype, mode,
1069 (names) ? names : "(Null)");
1071 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1074 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1075 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1078 top = PerlIONext(top);
1082 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1085 #undef PerlIO__close
1087 PerlIO__close(PerlIO *f)
1090 return (*PerlIOBase(f)->tab->Close) (f);
1092 SETERRNO(EBADF, SS$_IVCHAN);
1099 PerlIO_close(PerlIO *f)
1104 code = (*PerlIOBase(f)->tab->Close) (f);
1106 PerlIO_pop(aTHX_ f);
1112 #undef PerlIO_fileno
1114 PerlIO_fileno(PerlIO *f)
1117 return (*PerlIOBase(f)->tab->Fileno) (f);
1119 SETERRNO(EBADF, SS$_IVCHAN);
1125 PerlIO_context_layers(pTHX_ const char *mode)
1127 const char *type = NULL;
1129 * Need to supply default layer info from open.pm
1132 SV *layers = PL_curcop->cop_io;
1135 type = SvPV(layers, len);
1136 if (type && mode[0] != 'r') {
1138 * Skip to write part
1140 const char *s = strchr(type, 0);
1141 if (s && (s - type) < len) {
1150 static PerlIO_funcs *
1151 PerlIO_layer_from_ref(pTHX_ SV *sv)
1154 * For any scalar type load the handler which is bundled with perl
1156 if (SvTYPE(sv) < SVt_PVAV)
1157 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1160 * For other types allow if layer is known but don't try and load it
1162 switch (SvTYPE(sv)) {
1164 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1166 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1168 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1170 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1176 PerlIO_resolve_layers(pTHX_ const char *layers,
1177 const char *mode, int narg, SV **args)
1179 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1182 PerlIO_stdstreams(aTHX);
1186 * If it is a reference but not an object see if we have a handler
1189 if (SvROK(arg) && !sv_isobject(arg)) {
1190 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1192 def = PerlIO_list_alloc(aTHX);
1193 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1197 * Don't fail if handler cannot be found :Via(...) etc. may do
1198 * something sensible else we will just stringfy and open
1204 layers = PerlIO_context_layers(aTHX_ mode);
1205 if (layers && *layers) {
1209 av = PerlIO_list_alloc(aTHX);
1210 for (i = 0; i < def->cur; i++) {
1211 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1218 PerlIO_parse_layers(aTHX_ av, layers);
1229 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1230 int imode, int perm, PerlIO *f, int narg, SV **args)
1232 if (!f && narg == 1 && *args == &PL_sv_undef) {
1233 if ((f = PerlIO_tmpfile())) {
1235 layers = PerlIO_context_layers(aTHX_ mode);
1236 if (layers && *layers)
1237 PerlIO_apply_layers(aTHX_ f, mode, layers);
1241 PerlIO_list_t *layera = NULL;
1243 PerlIO_funcs *tab = NULL;
1246 * This is "reopen" - it is not tested as perl does not use it
1250 layera = PerlIO_list_alloc(aTHX);
1253 (l->tab->Getarg) ? (*l->tab->
1254 Getarg) (&l) : &PL_sv_undef;
1255 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1256 l = *PerlIONext(&l);
1260 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1263 * Start at "top" of layer stack
1265 n = layera->cur - 1;
1267 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1276 * Found that layer 'n' can do opens - call it
1278 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1279 tab->name, layers, mode, fd, imode, perm, f, narg,
1281 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1284 if (n + 1 < layera->cur) {
1286 * More layers above the one that we used to open -
1289 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1296 PerlIO_list_free(aTHX_ layera);
1302 #undef PerlIO_fdopen
1304 PerlIO_fdopen(int fd, const char *mode)
1307 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1312 PerlIO_open(const char *path, const char *mode)
1315 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1316 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1319 #undef PerlIO_reopen
1321 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1324 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1325 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1330 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1333 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1335 SETERRNO(EBADF, SS$_IVCHAN);
1340 #undef PerlIO_unread
1342 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1345 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1347 SETERRNO(EBADF, SS$_IVCHAN);
1354 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1357 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1359 SETERRNO(EBADF, SS$_IVCHAN);
1366 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1369 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1371 SETERRNO(EBADF, SS$_IVCHAN);
1378 PerlIO_tell(PerlIO *f)
1381 return (*PerlIOBase(f)->tab->Tell) (f);
1383 SETERRNO(EBADF, SS$_IVCHAN);
1390 PerlIO_flush(PerlIO *f)
1394 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1395 if (tab && tab->Flush) {
1396 return (*tab->Flush) (f);
1399 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1400 SETERRNO(EBADF, SS$_IVCHAN);
1405 PerlIO_debug("Cannot flush f=%p\n", f);
1406 SETERRNO(EBADF, SS$_IVCHAN);
1412 * Is it good API design to do flush-all on NULL, a potentially
1413 * errorneous input? Maybe some magical value (PerlIO*
1414 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1415 * things on fflush(NULL), but should we be bound by their design
1419 PerlIO **table = &PL_perlio;
1421 while ((f = *table)) {
1423 table = (PerlIO **) (f++);
1424 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1425 if (*f && PerlIO_flush(f) != 0)
1435 PerlIOBase_flush_linebuf()
1438 PerlIO **table = &PL_perlio;
1440 while ((f = *table)) {
1442 table = (PerlIO **) (f++);
1443 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1446 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1447 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1456 PerlIO_fill(PerlIO *f)
1459 return (*PerlIOBase(f)->tab->Fill) (f);
1461 SETERRNO(EBADF, SS$_IVCHAN);
1466 #undef PerlIO_isutf8
1468 PerlIO_isutf8(PerlIO *f)
1471 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1473 SETERRNO(EBADF, SS$_IVCHAN);
1480 PerlIO_eof(PerlIO *f)
1483 return (*PerlIOBase(f)->tab->Eof) (f);
1485 SETERRNO(EBADF, SS$_IVCHAN);
1492 PerlIO_error(PerlIO *f)
1495 return (*PerlIOBase(f)->tab->Error) (f);
1497 SETERRNO(EBADF, SS$_IVCHAN);
1502 #undef PerlIO_clearerr
1504 PerlIO_clearerr(PerlIO *f)
1507 (*PerlIOBase(f)->tab->Clearerr) (f);
1509 SETERRNO(EBADF, SS$_IVCHAN);
1512 #undef PerlIO_setlinebuf
1514 PerlIO_setlinebuf(PerlIO *f)
1517 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1519 SETERRNO(EBADF, SS$_IVCHAN);
1522 #undef PerlIO_has_base
1524 PerlIO_has_base(PerlIO *f)
1527 return (PerlIOBase(f)->tab->Get_base != NULL);
1532 #undef PerlIO_fast_gets
1534 PerlIO_fast_gets(PerlIO *f)
1536 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1537 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1538 return (tab->Set_ptrcnt != NULL);
1543 #undef PerlIO_has_cntptr
1545 PerlIO_has_cntptr(PerlIO *f)
1548 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1549 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1554 #undef PerlIO_canset_cnt
1556 PerlIO_canset_cnt(PerlIO *f)
1559 PerlIOl *l = PerlIOBase(f);
1560 return (l->tab->Set_ptrcnt != NULL);
1565 #undef PerlIO_get_base
1567 PerlIO_get_base(PerlIO *f)
1570 return (*PerlIOBase(f)->tab->Get_base) (f);
1574 #undef PerlIO_get_bufsiz
1576 PerlIO_get_bufsiz(PerlIO *f)
1579 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1583 #undef PerlIO_get_ptr
1585 PerlIO_get_ptr(PerlIO *f)
1587 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1588 if (tab->Get_ptr == NULL)
1590 return (*tab->Get_ptr) (f);
1593 #undef PerlIO_get_cnt
1595 PerlIO_get_cnt(PerlIO *f)
1597 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1598 if (tab->Get_cnt == NULL)
1600 return (*tab->Get_cnt) (f);
1603 #undef PerlIO_set_cnt
1605 PerlIO_set_cnt(PerlIO *f, int cnt)
1607 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1610 #undef PerlIO_set_ptrcnt
1612 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1614 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1615 if (tab->Set_ptrcnt == NULL) {
1617 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1619 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1622 /*--------------------------------------------------------------------------------------*/
1624 * utf8 and raw dummy layers
1628 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1630 if (PerlIONext(f)) {
1632 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1633 PerlIO_pop(aTHX_ f);
1634 if (tab->kind & PERLIO_K_UTF8)
1635 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1637 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1643 PerlIO_funcs PerlIO_utf8 = {
1646 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1664 NULL, /* get_base */
1665 NULL, /* get_bufsiz */
1668 NULL, /* set_ptrcnt */
1671 PerlIO_funcs PerlIO_byte = {
1692 NULL, /* get_base */
1693 NULL, /* get_bufsiz */
1696 NULL, /* set_ptrcnt */
1700 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1701 IV n, const char *mode, int fd, int imode, int perm,
1702 PerlIO *old, int narg, SV **args)
1704 PerlIO_funcs *tab = PerlIO_default_btm();
1705 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1709 PerlIO_funcs PerlIO_raw = {
1730 NULL, /* get_base */
1731 NULL, /* get_bufsiz */
1734 NULL, /* set_ptrcnt */
1736 /*--------------------------------------------------------------------------------------*/
1737 /*--------------------------------------------------------------------------------------*/
1739 * "Methods" of the "base class"
1743 PerlIOBase_fileno(PerlIO *f)
1745 return PerlIO_fileno(PerlIONext(f));
1749 PerlIO_modestr(PerlIO *f, char *buf)
1752 IV flags = PerlIOBase(f)->flags;
1753 if (flags & PERLIO_F_APPEND) {
1755 if (flags & PERLIO_F_CANREAD) {
1759 else if (flags & PERLIO_F_CANREAD) {
1761 if (flags & PERLIO_F_CANWRITE)
1764 else if (flags & PERLIO_F_CANWRITE) {
1766 if (flags & PERLIO_F_CANREAD) {
1770 #if O_TEXT != O_BINARY
1771 if (!(flags & PERLIO_F_CRLF))
1779 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1781 PerlIOl *l = PerlIOBase(f);
1783 const char *omode = mode;
1786 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1787 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1788 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1789 if (tab->Set_ptrcnt != NULL)
1790 l->flags |= PERLIO_F_FASTGETS;
1792 if (*mode == '#' || *mode == 'I')
1796 l->flags |= PERLIO_F_CANREAD;
1799 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1802 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1805 SETERRNO(EINVAL, LIB$_INVARG);
1811 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1814 l->flags &= ~PERLIO_F_CRLF;
1817 l->flags |= PERLIO_F_CRLF;
1820 SETERRNO(EINVAL, LIB$_INVARG);
1827 l->flags |= l->next->flags &
1828 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1833 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1834 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1835 l->flags, PerlIO_modestr(f, temp));
1841 PerlIOBase_popped(PerlIO *f)
1847 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1851 * Save the position as current head considers it
1853 Off_t old = PerlIO_tell(f);
1855 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1856 PerlIOSelf(f, PerlIOBuf)->posn = old;
1857 done = PerlIOBuf_unread(f, vbuf, count);
1862 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1864 STDCHAR *buf = (STDCHAR *) vbuf;
1866 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1869 SSize_t avail = PerlIO_get_cnt(f);
1872 take = (count < avail) ? count : avail;
1874 STDCHAR *ptr = PerlIO_get_ptr(f);
1875 Copy(ptr, buf, take, STDCHAR);
1876 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1880 if (count > 0 && avail <= 0) {
1881 if (PerlIO_fill(f) != 0)
1885 return (buf - (STDCHAR *) vbuf);
1891 PerlIOBase_noop_ok(PerlIO *f)
1897 PerlIOBase_noop_fail(PerlIO *f)
1903 PerlIOBase_close(PerlIO *f)
1906 PerlIO *n = PerlIONext(f);
1907 if (PerlIO_flush(f) != 0)
1909 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1911 PerlIOBase(f)->flags &=
1912 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1917 PerlIOBase_eof(PerlIO *f)
1920 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1926 PerlIOBase_error(PerlIO *f)
1929 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1935 PerlIOBase_clearerr(PerlIO *f)
1938 PerlIO *n = PerlIONext(f);
1939 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1946 PerlIOBase_setlinebuf(PerlIO *f)
1949 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1954 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1960 return sv_dup(arg, param);
1963 return newSVsv(arg);
1966 return newSVsv(arg);
1971 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1973 PerlIO *nexto = PerlIONext(o);
1975 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1976 f = (*tab->Dup)(aTHX_ f, nexto, param);
1979 PerlIO_funcs *self = PerlIOBase(o)->tab;
1982 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1984 arg = (*self->Getarg)(o);
1986 arg = PerlIO_sv_dup(aTHX_ arg, param);
1989 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1997 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1999 perl_mutex PerlIO_mutex;
2001 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2006 /* Place holder for stdstreams call ??? */
2008 MUTEX_INIT(&PerlIO_mutex);
2013 PerlIOUnix_refcnt_inc(int fd)
2015 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2017 MUTEX_LOCK(&PerlIO_mutex);
2019 PerlIO_fd_refcnt[fd]++;
2020 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2022 MUTEX_UNLOCK(&PerlIO_mutex);
2028 PerlIOUnix_refcnt_dec(int fd)
2031 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2033 MUTEX_LOCK(&PerlIO_mutex);
2035 cnt = --PerlIO_fd_refcnt[fd];
2036 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2038 MUTEX_UNLOCK(&PerlIO_mutex);
2045 PerlIO_cleanup(pTHX)
2049 PerlIO_debug("Cleanup %p\n",aTHX);
2051 /* Raise STDIN..STDERR refcount so we don't close them */
2052 for (i=0; i < 3; i++)
2053 PerlIOUnix_refcnt_inc(i);
2054 PerlIO_cleantable(aTHX_ &PL_perlio);
2055 /* Restore STDIN..STDERR refcount */
2056 for (i=0; i < 3; i++)
2057 PerlIOUnix_refcnt_dec(i);
2062 /*--------------------------------------------------------------------------------------*/
2064 * Bottom-most level for UNIX-like case
2068 struct _PerlIO base; /* The generic part */
2069 int fd; /* UNIX like file descriptor */
2070 int oflags; /* open/fcntl flags */
2074 PerlIOUnix_oflags(const char *mode)
2077 if (*mode == 'I' || *mode == '#')
2082 if (*++mode == '+') {
2089 oflags = O_CREAT | O_TRUNC;
2090 if (*++mode == '+') {
2099 oflags = O_CREAT | O_APPEND;
2100 if (*++mode == '+') {
2113 else if (*mode == 't') {
2115 oflags &= ~O_BINARY;
2119 * Always open in binary mode
2122 if (*mode || oflags == -1) {
2123 SETERRNO(EINVAL, LIB$_INVARG);
2130 PerlIOUnix_fileno(PerlIO *f)
2132 return PerlIOSelf(f, PerlIOUnix)->fd;
2136 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2138 IV code = PerlIOBase_pushed(f, mode, arg);
2139 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2140 if (*PerlIONext(f)) {
2141 s->fd = PerlIO_fileno(PerlIONext(f));
2143 * XXX could (or should) we retrieve the oflags from the open file
2144 * handle rather than believing the "mode" we are passed in? XXX
2145 * Should the value on NULL mode be 0 or -1?
2147 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2149 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2154 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2155 IV n, const char *mode, int fd, int imode,
2156 int perm, PerlIO *f, int narg, SV **args)
2159 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2160 (*PerlIOBase(f)->tab->Close) (f);
2163 char *path = SvPV_nolen(*args);
2167 imode = PerlIOUnix_oflags(mode);
2171 fd = PerlLIO_open3(path, imode, perm);
2179 f = PerlIO_allocate(aTHX);
2180 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2184 s = PerlIOSelf(f, PerlIOUnix);
2187 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2188 PerlIOUnix_refcnt_inc(fd);
2194 * FIXME: pop layers ???
2202 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2204 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2206 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2207 f = PerlIOBase_dup(aTHX_ f, o, param);
2209 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2210 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2212 PerlIOUnix_refcnt_inc(fd);
2221 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2224 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2225 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2228 SSize_t len = PerlLIO_read(fd, vbuf, count);
2229 if (len >= 0 || errno != EINTR) {
2231 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2232 else if (len == 0 && count != 0)
2233 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2241 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2244 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2246 SSize_t len = PerlLIO_write(fd, vbuf, count);
2247 if (len >= 0 || errno != EINTR) {
2249 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2257 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2261 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2262 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2263 return (new == (Off_t) - 1) ? -1 : 0;
2267 PerlIOUnix_tell(PerlIO *f)
2270 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2275 PerlIOUnix_close(PerlIO *f)
2278 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2280 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2281 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2282 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2287 SETERRNO(EBADF,SS$_IVCHAN);
2290 while (PerlLIO_close(fd) != 0) {
2291 if (errno != EINTR) {
2298 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2303 PerlIO_funcs PerlIO_unix = {
2319 PerlIOBase_noop_ok, /* flush */
2320 PerlIOBase_noop_fail, /* fill */
2323 PerlIOBase_clearerr,
2324 PerlIOBase_setlinebuf,
2325 NULL, /* get_base */
2326 NULL, /* get_bufsiz */
2329 NULL, /* set_ptrcnt */
2332 /*--------------------------------------------------------------------------------------*/
2338 struct _PerlIO base;
2339 FILE *stdio; /* The stream */
2343 PerlIOStdio_fileno(PerlIO *f)
2346 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2350 PerlIOStdio_mode(const char *mode, char *tmode)
2356 if (O_BINARY != O_TEXT) {
2364 * This isn't used yet ...
2367 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2369 if (*PerlIONext(f)) {
2371 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2374 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2375 PerlIOStdio_mode(mode, tmode));
2381 return PerlIOBase_pushed(f, mode, arg);
2384 #undef PerlIO_importFILE
2386 PerlIO_importFILE(FILE *stdio, int fl)
2392 PerlIOSelf(PerlIO_push
2393 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2394 "r+", Nullsv), PerlIOStdio);
2401 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2402 IV n, const char *mode, int fd, int imode,
2403 int perm, PerlIO *f, int narg, SV **args)
2407 char *path = SvPV_nolen(*args);
2408 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2410 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2411 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2416 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2421 char *path = SvPV_nolen(*args);
2424 fd = PerlLIO_open3(path, imode, perm);
2427 FILE *stdio = PerlSIO_fopen(path, mode);
2430 PerlIOSelf(PerlIO_push
2431 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2432 (mode = PerlIOStdio_mode(mode, tmode)),
2436 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2451 stdio = PerlSIO_stdin;
2454 stdio = PerlSIO_stdout;
2457 stdio = PerlSIO_stderr;
2462 stdio = PerlSIO_fdopen(fd, mode =
2463 PerlIOStdio_mode(mode, tmode));
2467 PerlIOSelf(PerlIO_push
2468 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2469 mode, PerlIOArg), PerlIOStdio);
2471 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2480 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2482 /* This assumes no layers underneath - which is what
2483 happens, but is not how I remember it. NI-S 2001/10/16
2485 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2486 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2487 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2488 PerlIOUnix_refcnt_inc(fileno(stdio));
2494 PerlIOStdio_close(PerlIO *f)
2497 #ifdef SOCKS5_VERSION_NAME
2499 Sock_size_t optlen = sizeof(int);
2501 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2502 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2503 /* Do not close it but do flush any buffers */
2508 #ifdef SOCKS5_VERSION_NAME
2510 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2512 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2514 PerlSIO_fclose(stdio)
2523 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2526 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2529 STDCHAR *buf = (STDCHAR *) vbuf;
2531 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2532 * stdio does not do that for fread()
2534 int ch = PerlSIO_fgetc(s);
2541 got = PerlSIO_fread(vbuf, 1, count, s);
2546 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2549 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2550 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2553 int ch = *buf-- & 0xff;
2554 if (PerlSIO_ungetc(ch, s) != ch)
2563 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2566 return PerlSIO_fwrite(vbuf, 1, count,
2567 PerlIOSelf(f, PerlIOStdio)->stdio);
2571 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2574 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2575 return PerlSIO_fseek(stdio, offset, whence);
2579 PerlIOStdio_tell(PerlIO *f)
2582 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2583 return PerlSIO_ftell(stdio);
2587 PerlIOStdio_flush(PerlIO *f)
2590 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2591 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2592 return PerlSIO_fflush(stdio);
2597 * FIXME: This discards ungetc() and pre-read stuff which is not
2598 * right if this is just a "sync" from a layer above Suspect right
2599 * design is to do _this_ but not have layer above flush this
2600 * layer read-to-read
2603 * Not writeable - sync by attempting a seek
2606 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2614 PerlIOStdio_fill(PerlIO *f)
2617 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2620 * fflush()ing read-only streams can cause trouble on some stdio-s
2622 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2623 if (PerlSIO_fflush(stdio) != 0)
2626 c = PerlSIO_fgetc(stdio);
2627 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2633 PerlIOStdio_eof(PerlIO *f)
2636 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2640 PerlIOStdio_error(PerlIO *f)
2643 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2647 PerlIOStdio_clearerr(PerlIO *f)
2650 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2654 PerlIOStdio_setlinebuf(PerlIO *f)
2657 #ifdef HAS_SETLINEBUF
2658 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2660 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2666 PerlIOStdio_get_base(PerlIO *f)
2669 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2670 return PerlSIO_get_base(stdio);
2674 PerlIOStdio_get_bufsiz(PerlIO *f)
2677 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2678 return PerlSIO_get_bufsiz(stdio);
2682 #ifdef USE_STDIO_PTR
2684 PerlIOStdio_get_ptr(PerlIO *f)
2687 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2688 return PerlSIO_get_ptr(stdio);
2692 PerlIOStdio_get_cnt(PerlIO *f)
2695 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2696 return PerlSIO_get_cnt(stdio);
2700 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2702 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2705 #ifdef STDIO_PTR_LVALUE
2706 PerlSIO_set_ptr(stdio, ptr);
2707 #ifdef STDIO_PTR_LVAL_SETS_CNT
2708 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2710 assert(PerlSIO_get_cnt(stdio) == (cnt));
2713 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2715 * Setting ptr _does_ change cnt - we are done
2719 #else /* STDIO_PTR_LVALUE */
2721 #endif /* STDIO_PTR_LVALUE */
2724 * Now (or only) set cnt
2726 #ifdef STDIO_CNT_LVALUE
2727 PerlSIO_set_cnt(stdio, cnt);
2728 #else /* STDIO_CNT_LVALUE */
2729 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2730 PerlSIO_set_ptr(stdio,
2731 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2733 #else /* STDIO_PTR_LVAL_SETS_CNT */
2735 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2736 #endif /* STDIO_CNT_LVALUE */
2741 PerlIO_funcs PerlIO_stdio = {
2743 sizeof(PerlIOStdio),
2761 PerlIOStdio_clearerr,
2762 PerlIOStdio_setlinebuf,
2764 PerlIOStdio_get_base,
2765 PerlIOStdio_get_bufsiz,
2770 #ifdef USE_STDIO_PTR
2771 PerlIOStdio_get_ptr,
2772 PerlIOStdio_get_cnt,
2773 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2774 PerlIOStdio_set_ptrcnt
2775 #else /* STDIO_PTR_LVALUE */
2777 #endif /* STDIO_PTR_LVALUE */
2778 #else /* USE_STDIO_PTR */
2782 #endif /* USE_STDIO_PTR */
2785 #undef PerlIO_exportFILE
2787 PerlIO_exportFILE(PerlIO *f, int fl)
2791 stdio = fdopen(PerlIO_fileno(f), "r+");
2795 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2802 #undef PerlIO_findFILE
2804 PerlIO_findFILE(PerlIO *f)
2808 if (l->tab == &PerlIO_stdio) {
2809 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2812 l = *PerlIONext(&l);
2814 return PerlIO_exportFILE(f, 0);
2817 #undef PerlIO_releaseFILE
2819 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2823 /*--------------------------------------------------------------------------------------*/
2825 * perlio buffer layer
2829 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2832 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2833 int fd = PerlIO_fileno(f);
2835 if (fd >= 0 && PerlLIO_isatty(fd)) {
2836 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2838 posn = PerlIO_tell(PerlIONext(f));
2839 if (posn != (Off_t) - 1) {
2842 return PerlIOBase_pushed(f, mode, arg);
2846 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2847 IV n, const char *mode, int fd, int imode, int perm,
2848 PerlIO *f, int narg, SV **args)
2851 PerlIO *next = PerlIONext(f);
2853 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2855 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2858 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2864 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2872 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2875 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2877 * if push fails during open, open fails. close will pop us.
2882 fd = PerlIO_fileno(f);
2883 #if (O_BINARY != O_TEXT) && !defined(__BEOS__)
2885 * do something about failing setmode()? --jhi
2887 PerlLIO_setmode(fd, O_BINARY);
2889 if (init && fd == 2) {
2891 * Initial stderr is unbuffered
2893 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2902 * This "flush" is akin to sfio's sync in that it handles files in either
2903 * read or write state
2906 PerlIOBuf_flush(PerlIO *f)
2908 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2910 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2912 * write() the buffer
2914 STDCHAR *buf = b->buf;
2916 PerlIO *n = PerlIONext(f);
2917 while (p < b->ptr) {
2918 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2922 else if (count < 0 || PerlIO_error(n)) {
2923 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2928 b->posn += (p - buf);
2930 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2931 STDCHAR *buf = PerlIO_get_base(f);
2933 * Note position change
2935 b->posn += (b->ptr - buf);
2936 if (b->ptr < b->end) {
2938 * We did not consume all of it
2940 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2941 b->posn = PerlIO_tell(PerlIONext(f));
2945 b->ptr = b->end = b->buf;
2946 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2948 * FIXME: Is this right for read case ?
2950 if (PerlIO_flush(PerlIONext(f)) != 0)
2956 PerlIOBuf_fill(PerlIO *f)
2958 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2959 PerlIO *n = PerlIONext(f);
2962 * FIXME: doing the down-stream flush is a bad idea if it causes
2963 * pre-read data in stdio buffer to be discarded but this is too
2964 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2965 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2967 if (PerlIO_flush(f) != 0)
2969 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2970 PerlIOBase_flush_linebuf();
2973 PerlIO_get_base(f); /* allocate via vtable */
2975 b->ptr = b->end = b->buf;
2976 if (PerlIO_fast_gets(n)) {
2978 * Layer below is also buffered We do _NOT_ want to call its
2979 * ->Read() because that will loop till it gets what we asked for
2980 * which may hang on a pipe etc. Instead take anything it has to
2981 * hand, or ask it to fill _once_.
2983 avail = PerlIO_get_cnt(n);
2985 avail = PerlIO_fill(n);
2987 avail = PerlIO_get_cnt(n);
2989 if (!PerlIO_error(n) && PerlIO_eof(n))
2994 STDCHAR *ptr = PerlIO_get_ptr(n);
2995 SSize_t cnt = avail;
2996 if (avail > b->bufsiz)
2998 Copy(ptr, b->buf, avail, STDCHAR);
2999 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3003 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3007 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3009 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3012 b->end = b->buf + avail;
3013 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3018 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3020 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3024 return PerlIOBase_read(f, vbuf, count);
3030 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3032 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3033 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3036 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3041 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3043 * Buffer is already a read buffer, we can overwrite any chars
3044 * which have been read back to buffer start
3046 avail = (b->ptr - b->buf);
3050 * Buffer is idle, set it up so whole buffer is available for
3054 b->end = b->buf + avail;
3056 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3058 * Buffer extends _back_ from where we are now
3060 b->posn -= b->bufsiz;
3062 if (avail > (SSize_t) count) {
3064 * If we have space for more than count, just move count
3072 * In simple stdio-like ungetc() case chars will be already
3075 if (buf != b->ptr) {
3076 Copy(buf, b->ptr, avail, STDCHAR);
3080 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3087 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3089 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3090 const STDCHAR *buf = (const STDCHAR *) vbuf;
3094 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3097 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3098 if ((SSize_t) count < avail)
3100 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3101 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3116 Copy(buf, b->ptr, avail, STDCHAR);
3123 if (b->ptr >= (b->buf + b->bufsiz))
3126 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3132 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3135 if ((code = PerlIO_flush(f)) == 0) {
3136 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3137 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3138 code = PerlIO_seek(PerlIONext(f), offset, whence);
3140 b->posn = PerlIO_tell(PerlIONext(f));
3147 PerlIOBuf_tell(PerlIO *f)
3149 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3151 * b->posn is file position where b->buf was read, or will be written
3153 Off_t posn = b->posn;
3156 * If buffer is valid adjust position by amount in buffer
3158 posn += (b->ptr - b->buf);
3164 PerlIOBuf_close(PerlIO *f)
3166 IV code = PerlIOBase_close(f);
3167 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3168 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3172 b->ptr = b->end = b->buf;
3173 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3178 PerlIOBuf_get_ptr(PerlIO *f)
3180 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3187 PerlIOBuf_get_cnt(PerlIO *f)
3189 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3192 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3193 return (b->end - b->ptr);
3198 PerlIOBuf_get_base(PerlIO *f)
3200 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3205 Newz('B',b->buf,b->bufsiz, STDCHAR);
3207 b->buf = (STDCHAR *) & b->oneword;
3208 b->bufsiz = sizeof(b->oneword);
3217 PerlIOBuf_bufsiz(PerlIO *f)
3219 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3222 return (b->end - b->buf);
3226 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3228 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3232 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3234 assert(PerlIO_get_cnt(f) == cnt);
3235 assert(b->ptr >= b->buf);
3237 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3241 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3243 return PerlIOBase_dup(aTHX_ f, o, param);
3248 PerlIO_funcs PerlIO_perlio = {
3268 PerlIOBase_clearerr,
3269 PerlIOBase_setlinebuf,
3274 PerlIOBuf_set_ptrcnt,
3277 /*--------------------------------------------------------------------------------------*/
3279 * Temp layer to hold unread chars when cannot do it any other way
3283 PerlIOPending_fill(PerlIO *f)
3286 * Should never happen
3293 PerlIOPending_close(PerlIO *f)
3296 * A tad tricky - flush pops us, then we close new top
3299 return PerlIO_close(f);
3303 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3306 * A tad tricky - flush pops us, then we seek new top
3309 return PerlIO_seek(f, offset, whence);
3314 PerlIOPending_flush(PerlIO *f)
3317 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3318 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3322 PerlIO_pop(aTHX_ f);
3327 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3333 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3338 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3340 IV code = PerlIOBase_pushed(f, mode, arg);
3341 PerlIOl *l = PerlIOBase(f);
3343 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3344 * etc. get muddled when it changes mid-string when we auto-pop.
3346 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3347 (PerlIOBase(PerlIONext(f))->
3348 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3353 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3355 SSize_t avail = PerlIO_get_cnt(f);
3360 got = PerlIOBuf_read(f, vbuf, avail);
3361 if (got >= 0 && got < count) {
3363 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3364 if (more >= 0 || got == 0)
3370 PerlIO_funcs PerlIO_pending = {
3374 PerlIOPending_pushed,
3385 PerlIOPending_close,
3386 PerlIOPending_flush,
3390 PerlIOBase_clearerr,
3391 PerlIOBase_setlinebuf,
3396 PerlIOPending_set_ptrcnt,
3401 /*--------------------------------------------------------------------------------------*/
3403 * crlf - translation On read translate CR,LF to "\n" we do this by
3404 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3405 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3409 PerlIOBuf base; /* PerlIOBuf stuff */
3410 STDCHAR *nl; /* Position of crlf we "lied" about in the
3415 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3418 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3419 code = PerlIOBuf_pushed(f, mode, arg);
3421 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3422 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3423 PerlIOBase(f)->flags);
3430 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3432 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3437 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3438 return PerlIOBuf_unread(f, vbuf, count);
3440 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3441 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3443 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3448 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3449 b->end = b->ptr = b->buf + b->bufsiz;
3450 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3451 b->posn -= b->bufsiz;
3453 while (count > 0 && b->ptr > b->buf) {
3456 if (b->ptr - 2 >= b->buf) {
3479 PerlIOCrlf_get_cnt(PerlIO *f)
3481 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3484 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3485 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3486 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3487 STDCHAR *nl = b->ptr;
3489 while (nl < b->end && *nl != 0xd)
3491 if (nl < b->end && *nl == 0xd) {
3493 if (nl + 1 < b->end) {
3500 * Not CR,LF but just CR
3508 * Blast - found CR as last char in buffer
3512 * They may not care, defer work as long as
3515 return (nl - b->ptr);
3519 b->ptr++; /* say we have read it as far as
3520 * flush() is concerned */
3521 b->buf++; /* Leave space an front of buffer */
3522 b->bufsiz--; /* Buffer is thus smaller */
3523 code = PerlIO_fill(f); /* Fetch some more */
3524 b->bufsiz++; /* Restore size for next time */
3525 b->buf--; /* Point at space */
3526 b->ptr = nl = b->buf; /* Which is what we hand
3528 b->posn--; /* Buffer starts here */
3529 *nl = 0xd; /* Fill in the CR */
3531 goto test; /* fill() call worked */
3533 * CR at EOF - just fall through
3539 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3545 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3547 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3548 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3549 IV flags = PerlIOBase(f)->flags;
3557 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3564 * Test code - delete when it works ...
3571 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3578 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3579 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3586 * They have taken what we lied about
3594 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3598 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3600 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3601 return PerlIOBuf_write(f, vbuf, count);
3603 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3604 const STDCHAR *buf = (const STDCHAR *) vbuf;
3605 const STDCHAR *ebuf = buf + count;
3608 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3610 while (buf < ebuf) {
3611 STDCHAR *eptr = b->buf + b->bufsiz;
3612 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3613 while (buf < ebuf && b->ptr < eptr) {
3615 if ((b->ptr + 2) > eptr) {
3623 *(b->ptr)++ = 0xd; /* CR */
3624 *(b->ptr)++ = 0xa; /* LF */
3626 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3636 if (b->ptr >= eptr) {
3642 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3644 return (buf - (STDCHAR *) vbuf);
3649 PerlIOCrlf_flush(PerlIO *f)
3651 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3656 return PerlIOBuf_flush(f);
3659 PerlIO_funcs PerlIO_crlf = {
3662 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3664 PerlIOBase_noop_ok, /* popped */
3669 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3671 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3672 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3680 PerlIOBase_clearerr,
3681 PerlIOBase_setlinebuf,
3686 PerlIOCrlf_set_ptrcnt,
3690 /*--------------------------------------------------------------------------------------*/
3692 * mmap as "buffer" layer
3696 PerlIOBuf base; /* PerlIOBuf stuff */
3697 Mmap_t mptr; /* Mapped address */
3698 Size_t len; /* mapped length */
3699 STDCHAR *bbuf; /* malloced buffer if map fails */
3702 static size_t page_size = 0;
3705 PerlIOMmap_map(PerlIO *f)
3708 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3709 IV flags = PerlIOBase(f)->flags;
3713 if (flags & PERLIO_F_CANREAD) {
3714 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3715 int fd = PerlIO_fileno(f);
3717 code = Fstat(fd, &st);
3718 if (code == 0 && S_ISREG(st.st_mode)) {
3719 SSize_t len = st.st_size - b->posn;
3723 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3725 SETERRNO(0, SS$_NORMAL);
3726 # ifdef _SC_PAGESIZE
3727 page_size = sysconf(_SC_PAGESIZE);
3729 page_size = sysconf(_SC_PAGE_SIZE);
3731 if ((long) page_size < 0) {
3736 (void) SvUPGRADE(error, SVt_PV);
3737 msg = SvPVx(error, n_a);
3738 Perl_croak(aTHX_ "panic: sysconf: %s",
3743 "panic: sysconf: pagesize unknown");
3747 # ifdef HAS_GETPAGESIZE
3748 page_size = getpagesize();
3750 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3751 page_size = PAGESIZE; /* compiletime, bad */
3755 if ((IV) page_size <= 0)
3756 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3761 * This is a hack - should never happen - open should
3764 b->posn = PerlIO_tell(PerlIONext(f));
3766 posn = (b->posn / page_size) * page_size;
3767 len = st.st_size - posn;
3768 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3769 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3770 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3771 madvise(m->mptr, len, MADV_SEQUENTIAL);
3773 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3774 madvise(m->mptr, len, MADV_WILLNEED);
3776 PerlIOBase(f)->flags =
3777 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3778 b->end = ((STDCHAR *) m->mptr) + len;
3779 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3788 PerlIOBase(f)->flags =
3789 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3791 b->ptr = b->end = b->ptr;
3800 PerlIOMmap_unmap(PerlIO *f)
3802 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3803 PerlIOBuf *b = &m->base;
3807 code = munmap(m->mptr, m->len);
3811 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3814 b->ptr = b->end = b->buf;
3815 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3821 PerlIOMmap_get_base(PerlIO *f)
3823 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3824 PerlIOBuf *b = &m->base;
3825 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3827 * Already have a readbuffer in progress
3833 * We have a write buffer or flushed PerlIOBuf read buffer
3835 m->bbuf = b->buf; /* save it in case we need it again */
3836 b->buf = NULL; /* Clear to trigger below */
3839 PerlIOMmap_map(f); /* Try and map it */
3842 * Map did not work - recover PerlIOBuf buffer if we have one
3847 b->ptr = b->end = b->buf;
3850 return PerlIOBuf_get_base(f);
3854 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3856 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3857 PerlIOBuf *b = &m->base;
3858 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3860 if (b->ptr && (b->ptr - count) >= b->buf
3861 && memEQ(b->ptr - count, vbuf, count)) {
3863 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3868 * Loose the unwritable mapped buffer
3872 * If flush took the "buffer" see if we have one from before
3874 if (!b->buf && m->bbuf)
3877 PerlIOBuf_get_base(f);
3881 return PerlIOBuf_unread(f, vbuf, count);
3885 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3887 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3888 PerlIOBuf *b = &m->base;
3889 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3891 * No, or wrong sort of, buffer
3894 if (PerlIOMmap_unmap(f) != 0)
3898 * If unmap took the "buffer" see if we have one from before
3900 if (!b->buf && m->bbuf)
3903 PerlIOBuf_get_base(f);
3907 return PerlIOBuf_write(f, vbuf, count);
3911 PerlIOMmap_flush(PerlIO *f)
3913 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3914 PerlIOBuf *b = &m->base;
3915 IV code = PerlIOBuf_flush(f);
3917 * Now we are "synced" at PerlIOBuf level
3924 if (PerlIOMmap_unmap(f) != 0)
3929 * We seem to have a PerlIOBuf buffer which was not mapped
3930 * remember it in case we need one later
3939 PerlIOMmap_fill(PerlIO *f)
3941 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3942 IV code = PerlIO_flush(f);
3943 if (code == 0 && !b->buf) {
3944 code = PerlIOMmap_map(f);
3946 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3947 code = PerlIOBuf_fill(f);
3953 PerlIOMmap_close(PerlIO *f)
3955 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3956 PerlIOBuf *b = &m->base;
3957 IV code = PerlIO_flush(f);
3961 b->ptr = b->end = b->buf;
3963 if (PerlIOBuf_close(f) != 0)
3969 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3971 return PerlIOBase_dup(aTHX_ f, o, param);
3975 PerlIO_funcs PerlIO_mmap = {
3995 PerlIOBase_clearerr,
3996 PerlIOBase_setlinebuf,
3997 PerlIOMmap_get_base,
4001 PerlIOBuf_set_ptrcnt,
4004 #endif /* HAS_MMAP */
4012 PerlIO_stdstreams(aTHX);
4014 return &PL_perlio[1];
4017 #undef PerlIO_stdout
4023 PerlIO_stdstreams(aTHX);
4025 return &PL_perlio[2];
4028 #undef PerlIO_stderr
4034 PerlIO_stdstreams(aTHX);
4036 return &PL_perlio[3];
4039 /*--------------------------------------------------------------------------------------*/
4041 #undef PerlIO_getname
4043 PerlIO_getname(PerlIO *f, char *buf)
4048 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4050 name = fgetname(stdio, buf);
4052 Perl_croak(aTHX_ "Don't know how to get file name");
4058 /*--------------------------------------------------------------------------------------*/
4060 * Functions which can be called on any kind of PerlIO implemented in
4066 PerlIO_getc(PerlIO *f)
4069 SSize_t count = PerlIO_read(f, buf, 1);
4071 return (unsigned char) buf[0];
4076 #undef PerlIO_ungetc
4078 PerlIO_ungetc(PerlIO *f, int ch)
4082 if (PerlIO_unread(f, &buf, 1) == 1)
4090 PerlIO_putc(PerlIO *f, int ch)
4093 return PerlIO_write(f, &buf, 1);
4098 PerlIO_puts(PerlIO *f, const char *s)
4100 STRLEN len = strlen(s);
4101 return PerlIO_write(f, s, len);
4104 #undef PerlIO_rewind
4106 PerlIO_rewind(PerlIO *f)
4108 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4112 #undef PerlIO_vprintf
4114 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4117 SV *sv = newSVpvn("", 0);
4123 Perl_va_copy(ap, apc);
4124 sv_vcatpvf(sv, fmt, &apc);
4126 sv_vcatpvf(sv, fmt, &ap);
4129 wrote = PerlIO_write(f, s, len);
4134 #undef PerlIO_printf
4136 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4141 result = PerlIO_vprintf(f, fmt, ap);
4146 #undef PerlIO_stdoutf
4148 PerlIO_stdoutf(const char *fmt, ...)
4153 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4158 #undef PerlIO_tmpfile
4160 PerlIO_tmpfile(void)
4163 * I have no idea how portable mkstemp() is ...
4165 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4168 FILE *stdio = PerlSIO_tmpfile();
4171 PerlIOSelf(PerlIO_push
4172 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4173 "w+", Nullsv), PerlIOStdio);
4179 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4180 int fd = mkstemp(SvPVX(sv));
4183 f = PerlIO_fdopen(fd, "w+");
4185 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4187 PerlLIO_unlink(SvPVX(sv));
4197 #endif /* USE_SFIO */
4198 #endif /* PERLIO_IS_STDIO */
4200 /*======================================================================================*/
4202 * Now some functions in terms of above which may be needed even if we are
4203 * not in true PerlIO mode
4207 #undef PerlIO_setpos
4209 PerlIO_setpos(PerlIO *f, SV *pos)
4214 Off_t *posn = (Off_t *) SvPV(pos, len);
4215 if (f && len == sizeof(Off_t))
4216 return PerlIO_seek(f, *posn, SEEK_SET);
4218 SETERRNO(EINVAL, SS$_IVCHAN);
4222 #undef PerlIO_setpos
4224 PerlIO_setpos(PerlIO *f, SV *pos)
4229 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4230 if (f && len == sizeof(Fpos_t)) {
4231 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4232 return fsetpos64(f, fpos);
4234 return fsetpos(f, fpos);
4238 SETERRNO(EINVAL, SS$_IVCHAN);
4244 #undef PerlIO_getpos
4246 PerlIO_getpos(PerlIO *f, SV *pos)
4249 Off_t posn = PerlIO_tell(f);
4250 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4251 return (posn == (Off_t) - 1) ? -1 : 0;
4254 #undef PerlIO_getpos
4256 PerlIO_getpos(PerlIO *f, SV *pos)
4261 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4262 code = fgetpos64(f, &fpos);
4264 code = fgetpos(f, &fpos);
4266 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4271 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4274 vprintf(char *pat, char *args)
4276 _doprnt(pat, args, stdout);
4277 return 0; /* wrong, but perl doesn't use the return
4282 vfprintf(FILE *fd, char *pat, char *args)
4284 _doprnt(pat, args, fd);
4285 return 0; /* wrong, but perl doesn't use the return
4291 #ifndef PerlIO_vsprintf
4293 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4295 int val = vsprintf(s, fmt, ap);
4297 if (strlen(s) >= (STRLEN) n) {
4299 (void) PerlIO_puts(Perl_error_log,
4300 "panic: sprintf overflow - memory corrupted!\n");
4308 #ifndef PerlIO_sprintf
4310 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4315 result = PerlIO_vsprintf(s, n, fmt, ap);