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)
179 int fd = PerlLIO_dup(PerlIO_fileno(f));
182 int omode = fcntl(fd, F_GETFL);
183 PerlIO_intmode2str(omode,mode,NULL);
184 /* the r+ is a hack */
185 return PerlIO_fdopen(fd, mode);
190 SETERRNO(EBADF, SS$_IVCHAN);
197 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
201 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
202 int imode, int perm, PerlIO *old, int narg, SV **args)
205 if (*args == &PL_sv_undef)
206 return PerlIO_tmpfile();
208 char *name = SvPV_nolen(*args);
210 fd = PerlLIO_open3(name, imode, perm);
212 return PerlIO_fdopen(fd, (char *) mode + 1);
215 return PerlIO_reopen(name, mode, old);
218 return PerlIO_open(name, mode);
223 return PerlIO_fdopen(fd, (char *) mode);
228 XS(XS_PerlIO__Layer__find)
232 Perl_croak(aTHX_ "Usage class->find(name[,load])");
234 char *name = SvPV_nolen(ST(1));
235 ST(0) = (strEQ(name, "crlf")
236 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
243 Perl_boot_core_PerlIO(pTHX)
245 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
251 #ifdef PERLIO_IS_STDIO
257 * Does nothing (yet) except force this file to be included in perl
258 * binary. That allows this file to force inclusion of other functions
259 * that may be required by loadable extensions e.g. for
260 * FileHandle::tmpfile
264 #undef PerlIO_tmpfile
271 #else /* PERLIO_IS_STDIO */
279 * This section is just to make sure these functions get pulled in from
283 #undef PerlIO_tmpfile
294 * Force this file to be included in perl binary. Which allows this
295 * file to force inclusion of other functions that may be required by
296 * loadable extensions e.g. for FileHandle::tmpfile
300 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
301 * results in a lot of lseek()s to regular files and lot of small
304 sfset(sfstdout, SF_SHARE, 0);
308 PerlIO_importFILE(FILE *stdio, int fl)
310 int fd = fileno(stdio);
311 PerlIO *r = PerlIO_fdopen(fd, "r+");
316 PerlIO_findFILE(PerlIO *pio)
318 int fd = PerlIO_fileno(pio);
319 FILE *f = fdopen(fd, "r+");
321 if (!f && errno == EINVAL)
323 if (!f && errno == EINVAL)
330 /*======================================================================================*/
332 * Implement all the PerlIO interface ourselves.
338 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
345 #include <sys/mman.h>
349 void PerlIO_debug(const char *fmt, ...)
350 __attribute__ ((format(__printf__, 1, 2)));
353 PerlIO_debug(const char *fmt, ...)
360 char *s = PerlEnv_getenv("PERLIO_DEBUG");
362 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
369 /* Use fixed buffer as sv_catpvf etc. needs SVs */
373 s = CopFILE(PL_curcop);
376 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
377 len = strlen(buffer);
378 vsprintf(buffer+len, fmt, ap);
379 PerlLIO_write(dbg, buffer, strlen(buffer));
381 SV *sv = newSVpvn("", 0);
384 s = CopFILE(PL_curcop);
387 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
388 (IV) CopLINE(PL_curcop));
389 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
392 PerlLIO_write(dbg, s, len);
399 /*--------------------------------------------------------------------------------------*/
402 * Inner level routines
406 * Table of pointers to the PerlIO structs (malloc'ed)
408 PerlIO *_perlio = NULL;
409 #define PERLIO_TABLE_SIZE 64
414 PerlIO_allocate(pTHX)
417 * Find a free slot in the table, allocating new table as necessary
422 while ((f = *last)) {
424 last = (PerlIO **) (f);
425 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
431 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
440 PerlIO_cleantable(pTHX_ PerlIO **tablep)
442 PerlIO *table = *tablep;
445 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
446 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
447 PerlIO *f = table + i;
452 PerlMemShared_free(table);
457 PerlIO_list_t *PerlIO_known_layers;
458 PerlIO_list_t *PerlIO_def_layerlist;
461 PerlIO_list_alloc(void)
464 Newz('L', list, 1, PerlIO_list_t);
470 PerlIO_list_free(PerlIO_list_t *list)
473 if (--list->refcnt == 0) {
477 for (i = 0; i < list->cur; i++) {
478 if (list->array[i].arg)
479 SvREFCNT_dec(list->array[i].arg);
481 Safefree(list->array);
489 PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
493 if (list->cur >= list->len) {
496 Renew(list->array, list->len, PerlIO_pair_t);
498 New('l', list->array, list->len, PerlIO_pair_t);
500 p = &(list->array[list->cur++]);
502 if ((p->arg = arg)) {
509 PerlIO_cleanup_layers(pTHX_ void *data)
512 PerlIO_known_layers = Nullhv;
513 PerlIO_def_layerlist = Nullav;
521 PerlIO_cleantable(aTHX_ & _perlio);
525 PerlIO_destruct(pTHX)
527 PerlIO **table = &_perlio;
529 while ((f = *table)) {
531 table = (PerlIO **) (f++);
532 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
536 if (l->tab->kind & PERLIO_K_DESTRUCT) {
537 PerlIO_debug("Destruct popping %s\n", l->tab->name);
551 PerlIO_pop(pTHX_ PerlIO *f)
555 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
556 if (l->tab->Popped) {
558 * If popped returns non-zero do not free its layer structure
559 * it has either done so itself, or it is shared and still in
562 if ((*l->tab->Popped) (f) != 0)
566 PerlMemShared_free(l);
570 /*--------------------------------------------------------------------------------------*/
572 * XS Interface for perl code
576 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
579 if ((SSize_t) len <= 0)
581 for (i = 0; i < PerlIO_known_layers->cur; i++) {
582 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
583 if (memEQ(f->name, name, len)) {
584 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
588 if (load && PL_subname && PerlIO_def_layerlist
589 && PerlIO_def_layerlist->cur >= 2) {
590 SV *pkgsv = newSVpvn("PerlIO", 6);
591 SV *layer = newSVpvn(name, len);
594 * The two SVs are magically freed by load_module
596 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
598 return PerlIO_find_layer(aTHX_ name, len, 0);
600 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
604 #ifdef USE_ATTRIBUTES_FOR_PERLIO
607 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
610 IO *io = GvIOn((GV *) SvRV(sv));
611 PerlIO *ifp = IoIFP(io);
612 PerlIO *ofp = IoOFP(io);
613 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
619 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
622 IO *io = GvIOn((GV *) SvRV(sv));
623 PerlIO *ifp = IoIFP(io);
624 PerlIO *ofp = IoOFP(io);
625 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
631 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
633 Perl_warn(aTHX_ "clear %" SVf, sv);
638 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
640 Perl_warn(aTHX_ "free %" SVf, sv);
644 MGVTBL perlio_vtab = {
652 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
655 SV *sv = SvRV(ST(1));
660 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
662 mg = mg_find(sv, PERL_MAGIC_ext);
663 mg->mg_virtual = &perlio_vtab;
665 Perl_warn(aTHX_ "attrib %" SVf, sv);
666 for (i = 2; i < items; i++) {
668 const char *name = SvPV(ST(i), len);
669 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
671 av_push(av, SvREFCNT_inc(layer));
682 #endif /* USE_ATTIBUTES_FOR_PERLIO */
685 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
687 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
688 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
692 XS(XS_PerlIO__Layer__find)
696 Perl_croak(aTHX_ "Usage class->find(name[,load])");
699 char *name = SvPV(ST(1), len);
700 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
701 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
703 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
710 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
712 if (!PerlIO_known_layers)
713 PerlIO_known_layers = PerlIO_list_alloc();
714 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
715 PerlIO_debug("define %s %p\n", tab->name, tab);
719 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
722 const char *s = names;
724 while (isSPACE(*s) || *s == ':')
729 const char *as = Nullch;
731 if (!isIDFIRST(*s)) {
733 * Message is consistent with how attribute lists are
734 * passed. Even though this means "foo : : bar" is
735 * seen as an invalid separator character.
737 char q = ((*s == '\'') ? '"' : '\'');
739 "perlio: invalid separator character %c%c%c in layer specification list",
745 } while (isALNUM(*e));
761 * It's a nul terminated string, not allowed
762 * to \ the terminating null. Anything other
763 * character is passed over.
774 "perlio: argument list not closed for layer \"%.*s\"",
786 PerlIO_funcs *layer =
787 PerlIO_find_layer(aTHX_ s, llen, 1);
789 PerlIO_list_push(av, layer,
795 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
808 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
810 PerlIO_funcs *tab = &PerlIO_perlio;
811 if (O_BINARY != O_TEXT) {
815 if (PerlIO_stdio.Set_ptrcnt) {
819 PerlIO_debug("Pushing %s\n", tab->name);
820 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
825 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
827 return av->array[n].arg;
831 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
833 if (n >= 0 && n < av->cur) {
834 PerlIO_debug("Layer %" IVdf " is %s\n", n,
835 av->array[n].funcs->name);
836 return av->array[n].funcs;
839 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
844 PerlIO_default_layers(pTHX)
846 if (!PerlIO_def_layerlist) {
847 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
848 PerlIO_funcs *osLayer = &PerlIO_unix;
849 PerlIO_def_layerlist = PerlIO_list_alloc();
850 PerlIO_define_layer(aTHX_ & PerlIO_unix);
851 #if defined(WIN32) && !defined(UNDER_CE)
852 PerlIO_define_layer(aTHX_ & PerlIO_win32);
854 osLayer = &PerlIO_win32;
857 PerlIO_define_layer(aTHX_ & PerlIO_raw);
858 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
859 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
860 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
862 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
864 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
865 PerlIO_define_layer(aTHX_ & PerlIO_byte);
866 PerlIO_list_push(PerlIO_def_layerlist,
867 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
870 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
873 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
876 if (PerlIO_def_layerlist->cur < 2) {
877 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
879 return PerlIO_def_layerlist;
883 Perl_boot_core_PerlIO(pTHX)
885 #ifdef USE_ATTRIBUTES_FOR_PERLIO
886 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
889 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
893 PerlIO_default_layer(pTHX_ I32 n)
895 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
898 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
901 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
902 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
905 PerlIO_stdstreams(pTHX)
908 PerlIO_allocate(aTHX);
909 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
910 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
911 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
916 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
919 l = PerlMemShared_calloc(tab->size, sizeof(char));
921 Zero(l, tab->size, char);
925 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
926 (mode) ? mode : "(Null)", arg);
927 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
936 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
949 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
952 * Remove the dummy layer
957 * Pop back to bottom layer
961 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
962 if (*PerlIONext(f)) {
967 * Nothing bellow - push unix on top then remove it
969 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
970 PerlIO_pop(aTHX_ PerlIONext(f));
975 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
982 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
983 PerlIO_list_t *layers, IV n)
985 IV max = layers->cur;
988 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
990 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1001 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1005 PerlIO_list_t *layers = PerlIO_list_alloc();
1006 code = PerlIO_parse_layers(aTHX_ layers, names);
1008 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1010 PerlIO_list_free(layers);
1016 /*--------------------------------------------------------------------------------------*/
1018 * Given the abstraction above the public API functions
1022 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1024 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1025 f, PerlIOBase(f)->tab->name, iotype, mode,
1026 (names) ? names : "(Null)");
1028 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1031 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1032 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1035 top = PerlIONext(top);
1039 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1042 #undef PerlIO__close
1044 PerlIO__close(PerlIO *f)
1047 return (*PerlIOBase(f)->tab->Close) (f);
1049 SETERRNO(EBADF, SS$_IVCHAN);
1054 #undef PerlIO_fdupopen
1056 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
1059 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1061 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
1062 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
1066 SETERRNO(EBADF, SS$_IVCHAN);
1073 PerlIO_close(PerlIO *f)
1078 code = (*PerlIOBase(f)->tab->Close) (f);
1080 PerlIO_pop(aTHX_ f);
1086 #undef PerlIO_fileno
1088 PerlIO_fileno(PerlIO *f)
1091 return (*PerlIOBase(f)->tab->Fileno) (f);
1093 SETERRNO(EBADF, SS$_IVCHAN);
1099 PerlIO_context_layers(pTHX_ const char *mode)
1101 const char *type = NULL;
1103 * Need to supply default layer info from open.pm
1106 SV *layers = PL_curcop->cop_io;
1109 type = SvPV(layers, len);
1110 if (type && mode[0] != 'r') {
1112 * Skip to write part
1114 const char *s = strchr(type, 0);
1115 if (s && (s - type) < len) {
1124 static PerlIO_funcs *
1125 PerlIO_layer_from_ref(pTHX_ SV *sv)
1128 * For any scalar type load the handler which is bundled with perl
1130 if (SvTYPE(sv) < SVt_PVAV)
1131 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1134 * For other types allow if layer is known but don't try and load it
1136 switch (SvTYPE(sv)) {
1138 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1140 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1142 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1144 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1150 PerlIO_resolve_layers(pTHX_ const char *layers,
1151 const char *mode, int narg, SV **args)
1153 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1156 PerlIO_stdstreams(aTHX);
1160 * If it is a reference but not an object see if we have a handler
1163 if (SvROK(arg) && !sv_isobject(arg)) {
1164 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1166 def = PerlIO_list_alloc();
1167 PerlIO_list_push(def, handler, &PL_sv_undef);
1171 * Don't fail if handler cannot be found :Via(...) etc. may do
1172 * something sensible else we will just stringfy and open
1178 layers = PerlIO_context_layers(aTHX_ mode);
1179 if (layers && *layers) {
1183 av = PerlIO_list_alloc();
1184 for (i = 0; i < def->cur; i++) {
1185 PerlIO_list_push(av, def->array[i].funcs,
1192 PerlIO_parse_layers(aTHX_ av, layers);
1203 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1204 int imode, int perm, PerlIO *f, int narg, SV **args)
1206 if (!f && narg == 1 && *args == &PL_sv_undef) {
1207 if ((f = PerlIO_tmpfile())) {
1209 layers = PerlIO_context_layers(aTHX_ mode);
1210 if (layers && *layers)
1211 PerlIO_apply_layers(aTHX_ f, mode, layers);
1215 PerlIO_list_t *layera = NULL;
1217 PerlIO_funcs *tab = NULL;
1220 * This is "reopen" - it is not tested as perl does not use it
1224 layera = PerlIO_list_alloc();
1227 (l->tab->Getarg) ? (*l->tab->
1228 Getarg) (&l) : &PL_sv_undef;
1229 PerlIO_list_push(layera, l->tab, arg);
1230 l = *PerlIONext(&l);
1234 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1237 * Start at "top" of layer stack
1239 n = layera->cur - 1;
1241 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1250 * Found that layer 'n' can do opens - call it
1252 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1253 tab->name, layers, mode, fd, imode, perm, f, narg,
1255 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1258 if (n + 1 < layera->cur) {
1260 * More layers above the one that we used to open -
1263 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1270 PerlIO_list_free(layera);
1276 #undef PerlIO_fdopen
1278 PerlIO_fdopen(int fd, const char *mode)
1281 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1286 PerlIO_open(const char *path, const char *mode)
1289 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1290 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1293 #undef PerlIO_reopen
1295 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1298 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1299 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1304 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1307 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1309 SETERRNO(EBADF, SS$_IVCHAN);
1314 #undef PerlIO_unread
1316 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1319 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1321 SETERRNO(EBADF, SS$_IVCHAN);
1328 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1331 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1333 SETERRNO(EBADF, SS$_IVCHAN);
1340 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1343 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1345 SETERRNO(EBADF, SS$_IVCHAN);
1352 PerlIO_tell(PerlIO *f)
1355 return (*PerlIOBase(f)->tab->Tell) (f);
1357 SETERRNO(EBADF, SS$_IVCHAN);
1364 PerlIO_flush(PerlIO *f)
1368 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1369 if (tab && tab->Flush) {
1370 return (*tab->Flush) (f);
1373 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1374 SETERRNO(EBADF, SS$_IVCHAN);
1379 PerlIO_debug("Cannot flush f=%p\n", f);
1380 SETERRNO(EBADF, SS$_IVCHAN);
1386 * Is it good API design to do flush-all on NULL, a potentially
1387 * errorneous input? Maybe some magical value (PerlIO*
1388 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1389 * things on fflush(NULL), but should we be bound by their design
1392 PerlIO **table = &_perlio;
1394 while ((f = *table)) {
1396 table = (PerlIO **) (f++);
1397 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1398 if (*f && PerlIO_flush(f) != 0)
1408 PerlIOBase_flush_linebuf()
1410 PerlIO **table = &_perlio;
1412 while ((f = *table)) {
1414 table = (PerlIO **) (f++);
1415 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1418 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1419 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1428 PerlIO_fill(PerlIO *f)
1431 return (*PerlIOBase(f)->tab->Fill) (f);
1433 SETERRNO(EBADF, SS$_IVCHAN);
1438 #undef PerlIO_isutf8
1440 PerlIO_isutf8(PerlIO *f)
1443 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1445 SETERRNO(EBADF, SS$_IVCHAN);
1452 PerlIO_eof(PerlIO *f)
1455 return (*PerlIOBase(f)->tab->Eof) (f);
1457 SETERRNO(EBADF, SS$_IVCHAN);
1464 PerlIO_error(PerlIO *f)
1467 return (*PerlIOBase(f)->tab->Error) (f);
1469 SETERRNO(EBADF, SS$_IVCHAN);
1474 #undef PerlIO_clearerr
1476 PerlIO_clearerr(PerlIO *f)
1479 (*PerlIOBase(f)->tab->Clearerr) (f);
1481 SETERRNO(EBADF, SS$_IVCHAN);
1484 #undef PerlIO_setlinebuf
1486 PerlIO_setlinebuf(PerlIO *f)
1489 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1491 SETERRNO(EBADF, SS$_IVCHAN);
1494 #undef PerlIO_has_base
1496 PerlIO_has_base(PerlIO *f)
1499 return (PerlIOBase(f)->tab->Get_base != NULL);
1504 #undef PerlIO_fast_gets
1506 PerlIO_fast_gets(PerlIO *f)
1508 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1509 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1510 return (tab->Set_ptrcnt != NULL);
1515 #undef PerlIO_has_cntptr
1517 PerlIO_has_cntptr(PerlIO *f)
1520 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1521 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1526 #undef PerlIO_canset_cnt
1528 PerlIO_canset_cnt(PerlIO *f)
1531 PerlIOl *l = PerlIOBase(f);
1532 return (l->tab->Set_ptrcnt != NULL);
1537 #undef PerlIO_get_base
1539 PerlIO_get_base(PerlIO *f)
1542 return (*PerlIOBase(f)->tab->Get_base) (f);
1546 #undef PerlIO_get_bufsiz
1548 PerlIO_get_bufsiz(PerlIO *f)
1551 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1555 #undef PerlIO_get_ptr
1557 PerlIO_get_ptr(PerlIO *f)
1559 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1560 if (tab->Get_ptr == NULL)
1562 return (*tab->Get_ptr) (f);
1565 #undef PerlIO_get_cnt
1567 PerlIO_get_cnt(PerlIO *f)
1569 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1570 if (tab->Get_cnt == NULL)
1572 return (*tab->Get_cnt) (f);
1575 #undef PerlIO_set_cnt
1577 PerlIO_set_cnt(PerlIO *f, int cnt)
1579 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1582 #undef PerlIO_set_ptrcnt
1584 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1586 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1587 if (tab->Set_ptrcnt == NULL) {
1589 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1591 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1594 /*--------------------------------------------------------------------------------------*/
1596 * utf8 and raw dummy layers
1600 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1602 if (PerlIONext(f)) {
1604 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1605 PerlIO_pop(aTHX_ f);
1606 if (tab->kind & PERLIO_K_UTF8)
1607 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1609 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1615 PerlIO_funcs PerlIO_utf8 = {
1618 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1636 NULL, /* get_base */
1637 NULL, /* get_bufsiz */
1640 NULL, /* set_ptrcnt */
1643 PerlIO_funcs PerlIO_byte = {
1664 NULL, /* get_base */
1665 NULL, /* get_bufsiz */
1668 NULL, /* set_ptrcnt */
1672 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1673 IV n, const char *mode, int fd, int imode, int perm,
1674 PerlIO *old, int narg, SV **args)
1676 PerlIO_funcs *tab = PerlIO_default_btm();
1677 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1681 PerlIO_funcs PerlIO_raw = {
1702 NULL, /* get_base */
1703 NULL, /* get_bufsiz */
1706 NULL, /* set_ptrcnt */
1708 /*--------------------------------------------------------------------------------------*/
1709 /*--------------------------------------------------------------------------------------*/
1711 * "Methods" of the "base class"
1715 PerlIOBase_fileno(PerlIO *f)
1717 return PerlIO_fileno(PerlIONext(f));
1721 PerlIO_modestr(PerlIO *f, char *buf)
1724 IV flags = PerlIOBase(f)->flags;
1725 if (flags & PERLIO_F_APPEND) {
1727 if (flags & PERLIO_F_CANREAD) {
1731 else if (flags & PERLIO_F_CANREAD) {
1733 if (flags & PERLIO_F_CANWRITE)
1736 else if (flags & PERLIO_F_CANWRITE) {
1738 if (flags & PERLIO_F_CANREAD) {
1742 #if O_TEXT != O_BINARY
1743 if (!(flags & PERLIO_F_CRLF))
1751 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1753 PerlIOl *l = PerlIOBase(f);
1755 const char *omode = mode;
1758 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1759 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1760 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1761 if (tab->Set_ptrcnt != NULL)
1762 l->flags |= PERLIO_F_FASTGETS;
1764 if (*mode == '#' || *mode == 'I')
1768 l->flags |= PERLIO_F_CANREAD;
1771 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1774 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1777 SETERRNO(EINVAL, LIB$_INVARG);
1783 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1786 l->flags &= ~PERLIO_F_CRLF;
1789 l->flags |= PERLIO_F_CRLF;
1792 SETERRNO(EINVAL, LIB$_INVARG);
1799 l->flags |= l->next->flags &
1800 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1805 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1806 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1807 l->flags, PerlIO_modestr(f, temp));
1813 PerlIOBase_popped(PerlIO *f)
1819 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1823 * Save the position as current head considers it
1825 Off_t old = PerlIO_tell(f);
1827 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1828 PerlIOSelf(f, PerlIOBuf)->posn = old;
1829 done = PerlIOBuf_unread(f, vbuf, count);
1834 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1836 STDCHAR *buf = (STDCHAR *) vbuf;
1838 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1841 SSize_t avail = PerlIO_get_cnt(f);
1844 take = (count < avail) ? count : avail;
1846 STDCHAR *ptr = PerlIO_get_ptr(f);
1847 Copy(ptr, buf, take, STDCHAR);
1848 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1852 if (count > 0 && avail <= 0) {
1853 if (PerlIO_fill(f) != 0)
1857 return (buf - (STDCHAR *) vbuf);
1863 PerlIOBase_noop_ok(PerlIO *f)
1869 PerlIOBase_noop_fail(PerlIO *f)
1875 PerlIOBase_close(PerlIO *f)
1878 PerlIO *n = PerlIONext(f);
1879 if (PerlIO_flush(f) != 0)
1881 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1883 PerlIOBase(f)->flags &=
1884 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1889 PerlIOBase_eof(PerlIO *f)
1892 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1898 PerlIOBase_error(PerlIO *f)
1901 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1907 PerlIOBase_clearerr(PerlIO *f)
1910 PerlIO *n = PerlIONext(f);
1911 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1918 PerlIOBase_setlinebuf(PerlIO *f)
1921 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1925 /*--------------------------------------------------------------------------------------*/
1927 * Bottom-most level for UNIX-like case
1931 struct _PerlIO base; /* The generic part */
1932 int fd; /* UNIX like file descriptor */
1933 int oflags; /* open/fcntl flags */
1937 PerlIOUnix_oflags(const char *mode)
1940 if (*mode == 'I' || *mode == '#')
1945 if (*++mode == '+') {
1952 oflags = O_CREAT | O_TRUNC;
1953 if (*++mode == '+') {
1962 oflags = O_CREAT | O_APPEND;
1963 if (*++mode == '+') {
1976 else if (*mode == 't') {
1978 oflags &= ~O_BINARY;
1982 * Always open in binary mode
1985 if (*mode || oflags == -1) {
1986 SETERRNO(EINVAL, LIB$_INVARG);
1993 PerlIOUnix_fileno(PerlIO *f)
1995 return PerlIOSelf(f, PerlIOUnix)->fd;
1999 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2001 IV code = PerlIOBase_pushed(f, mode, arg);
2002 if (*PerlIONext(f)) {
2003 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2004 s->fd = PerlIO_fileno(PerlIONext(f));
2006 * XXX could (or should) we retrieve the oflags from the open file
2007 * handle rather than believing the "mode" we are passed in? XXX
2008 * Should the value on NULL mode be 0 or -1?
2010 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2012 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2017 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2018 IV n, const char *mode, int fd, int imode,
2019 int perm, PerlIO *f, int narg, SV **args)
2022 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2023 (*PerlIOBase(f)->tab->Close) (f);
2026 char *path = SvPV_nolen(*args);
2030 imode = PerlIOUnix_oflags(mode);
2034 fd = PerlLIO_open3(path, imode, perm);
2042 f = PerlIO_allocate(aTHX);
2043 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2047 s = PerlIOSelf(f, PerlIOUnix);
2050 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2056 * FIXME: pop layers ???
2064 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2070 return sv_dup(arg, param);
2073 return newSVsv(arg);
2076 return newSVsv(arg);
2081 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2083 PerlIO *nexto = PerlIONext(o);
2085 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2086 f = (*tab->Dup)(aTHX_ f, nexto, param);
2089 PerlIO_funcs *self = PerlIOBase(o)->tab;
2092 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
2094 arg = (*self->Getarg)(o);
2096 arg = PerlIO_sv_dup(aTHX_ arg, param);
2099 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2108 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2110 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2111 int fd = PerlLIO_dup(os->fd);
2113 f = PerlIOBase_dup(aTHX_ f, o, param);
2115 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2116 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2129 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2132 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2133 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2136 SSize_t len = PerlLIO_read(fd, vbuf, count);
2137 if (len >= 0 || errno != EINTR) {
2139 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2140 else if (len == 0 && count != 0)
2141 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2149 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2152 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2154 SSize_t len = PerlLIO_write(fd, vbuf, count);
2155 if (len >= 0 || errno != EINTR) {
2157 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2165 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2169 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2170 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2171 return (new == (Off_t) - 1) ? -1 : 0;
2175 PerlIOUnix_tell(PerlIO *f)
2178 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2183 PerlIOUnix_close(PerlIO *f)
2186 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2188 while (PerlLIO_close(fd) != 0) {
2189 if (errno != EINTR) {
2196 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2201 PerlIO_funcs PerlIO_unix = {
2217 PerlIOBase_noop_ok, /* flush */
2218 PerlIOBase_noop_fail, /* fill */
2221 PerlIOBase_clearerr,
2222 PerlIOBase_setlinebuf,
2223 NULL, /* get_base */
2224 NULL, /* get_bufsiz */
2227 NULL, /* set_ptrcnt */
2230 /*--------------------------------------------------------------------------------------*/
2236 struct _PerlIO base;
2237 FILE *stdio; /* The stream */
2241 PerlIOStdio_fileno(PerlIO *f)
2244 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2248 PerlIOStdio_mode(const char *mode, char *tmode)
2254 if (O_BINARY != O_TEXT) {
2262 * This isn't used yet ...
2265 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2267 if (*PerlIONext(f)) {
2269 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2272 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2273 PerlIOStdio_mode(mode, tmode));
2279 return PerlIOBase_pushed(f, mode, arg);
2282 #undef PerlIO_importFILE
2284 PerlIO_importFILE(FILE *stdio, int fl)
2290 PerlIOSelf(PerlIO_push
2291 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2292 "r+", Nullsv), PerlIOStdio);
2299 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2300 IV n, const char *mode, int fd, int imode,
2301 int perm, PerlIO *f, int narg, SV **args)
2305 char *path = SvPV_nolen(*args);
2306 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2308 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2317 char *path = SvPV_nolen(*args);
2320 fd = PerlLIO_open3(path, imode, perm);
2323 FILE *stdio = PerlSIO_fopen(path, mode);
2326 PerlIOSelf(PerlIO_push
2327 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2328 (mode = PerlIOStdio_mode(mode, tmode)),
2346 stdio = PerlSIO_stdin;
2349 stdio = PerlSIO_stdout;
2352 stdio = PerlSIO_stderr;
2357 stdio = PerlSIO_fdopen(fd, mode =
2358 PerlIOStdio_mode(mode, tmode));
2362 PerlIOSelf(PerlIO_push
2363 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2364 mode, PerlIOArg), PerlIOStdio);
2374 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2377 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2380 STDCHAR *buf = (STDCHAR *) vbuf;
2382 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2383 * stdio does not do that for fread()
2385 int ch = PerlSIO_fgetc(s);
2392 got = PerlSIO_fread(vbuf, 1, count, s);
2397 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2400 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2401 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2404 int ch = *buf-- & 0xff;
2405 if (PerlSIO_ungetc(ch, s) != ch)
2414 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2417 return PerlSIO_fwrite(vbuf, 1, count,
2418 PerlIOSelf(f, PerlIOStdio)->stdio);
2422 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2425 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2426 return PerlSIO_fseek(stdio, offset, whence);
2430 PerlIOStdio_tell(PerlIO *f)
2433 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2434 return PerlSIO_ftell(stdio);
2438 PerlIOStdio_close(PerlIO *f)
2441 #ifdef SOCKS5_VERSION_NAME
2443 Sock_size_t optlen = sizeof(int);
2445 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2447 #ifdef SOCKS5_VERSION_NAME
2449 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2451 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2453 PerlSIO_fclose(stdio)
2460 PerlIOStdio_flush(PerlIO *f)
2463 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2464 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2465 return PerlSIO_fflush(stdio);
2470 * FIXME: This discards ungetc() and pre-read stuff which is not
2471 * right if this is just a "sync" from a layer above Suspect right
2472 * design is to do _this_ but not have layer above flush this
2473 * layer read-to-read
2476 * Not writeable - sync by attempting a seek
2479 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2487 PerlIOStdio_fill(PerlIO *f)
2490 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2493 * fflush()ing read-only streams can cause trouble on some stdio-s
2495 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2496 if (PerlSIO_fflush(stdio) != 0)
2499 c = PerlSIO_fgetc(stdio);
2500 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2506 PerlIOStdio_eof(PerlIO *f)
2509 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2513 PerlIOStdio_error(PerlIO *f)
2516 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2520 PerlIOStdio_clearerr(PerlIO *f)
2523 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2527 PerlIOStdio_setlinebuf(PerlIO *f)
2530 #ifdef HAS_SETLINEBUF
2531 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2533 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2539 PerlIOStdio_get_base(PerlIO *f)
2542 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2543 return PerlSIO_get_base(stdio);
2547 PerlIOStdio_get_bufsiz(PerlIO *f)
2550 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2551 return PerlSIO_get_bufsiz(stdio);
2555 #ifdef USE_STDIO_PTR
2557 PerlIOStdio_get_ptr(PerlIO *f)
2560 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2561 return PerlSIO_get_ptr(stdio);
2565 PerlIOStdio_get_cnt(PerlIO *f)
2568 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2569 return PerlSIO_get_cnt(stdio);
2573 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2575 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2578 #ifdef STDIO_PTR_LVALUE
2579 PerlSIO_set_ptr(stdio, ptr);
2580 #ifdef STDIO_PTR_LVAL_SETS_CNT
2581 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2583 assert(PerlSIO_get_cnt(stdio) == (cnt));
2586 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2588 * Setting ptr _does_ change cnt - we are done
2592 #else /* STDIO_PTR_LVALUE */
2594 #endif /* STDIO_PTR_LVALUE */
2597 * Now (or only) set cnt
2599 #ifdef STDIO_CNT_LVALUE
2600 PerlSIO_set_cnt(stdio, cnt);
2601 #else /* STDIO_CNT_LVALUE */
2602 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2603 PerlSIO_set_ptr(stdio,
2604 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2606 #else /* STDIO_PTR_LVAL_SETS_CNT */
2608 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2609 #endif /* STDIO_CNT_LVALUE */
2615 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2617 /* This assumes no layers underneath - which is what
2618 happens, but is not how I remember it. NI-S 2001/10/16
2620 int fd = PerlLIO_dup(PerlIO_fileno(o));
2623 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2625 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2626 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2629 PerlSIO_fclose(stdio);
2640 PerlIO_funcs PerlIO_stdio = {
2642 sizeof(PerlIOStdio),
2660 PerlIOStdio_clearerr,
2661 PerlIOStdio_setlinebuf,
2663 PerlIOStdio_get_base,
2664 PerlIOStdio_get_bufsiz,
2669 #ifdef USE_STDIO_PTR
2670 PerlIOStdio_get_ptr,
2671 PerlIOStdio_get_cnt,
2672 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2673 PerlIOStdio_set_ptrcnt
2674 #else /* STDIO_PTR_LVALUE */
2676 #endif /* STDIO_PTR_LVALUE */
2677 #else /* USE_STDIO_PTR */
2681 #endif /* USE_STDIO_PTR */
2684 #undef PerlIO_exportFILE
2686 PerlIO_exportFILE(PerlIO *f, int fl)
2690 stdio = fdopen(PerlIO_fileno(f), "r+");
2694 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2701 #undef PerlIO_findFILE
2703 PerlIO_findFILE(PerlIO *f)
2707 if (l->tab == &PerlIO_stdio) {
2708 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2711 l = *PerlIONext(&l);
2713 return PerlIO_exportFILE(f, 0);
2716 #undef PerlIO_releaseFILE
2718 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2722 /*--------------------------------------------------------------------------------------*/
2724 * perlio buffer layer
2728 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2731 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2732 int fd = PerlIO_fileno(f);
2734 if (fd >= 0 && PerlLIO_isatty(fd)) {
2735 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2737 posn = PerlIO_tell(PerlIONext(f));
2738 if (posn != (Off_t) - 1) {
2741 return PerlIOBase_pushed(f, mode, arg);
2745 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2746 IV n, const char *mode, int fd, int imode, int perm,
2747 PerlIO *f, int narg, SV **args)
2750 PerlIO *next = PerlIONext(f);
2752 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2754 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2757 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2763 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2771 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2774 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2775 fd = PerlIO_fileno(f);
2776 #if O_BINARY != O_TEXT
2778 * do something about failing setmode()? --jhi
2780 PerlLIO_setmode(fd, O_BINARY);
2782 if (init && fd == 2) {
2784 * Initial stderr is unbuffered
2786 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2794 * This "flush" is akin to sfio's sync in that it handles files in either
2795 * read or write state
2798 PerlIOBuf_flush(PerlIO *f)
2800 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2802 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2804 * write() the buffer
2806 STDCHAR *buf = b->buf;
2808 PerlIO *n = PerlIONext(f);
2809 while (p < b->ptr) {
2810 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2814 else if (count < 0 || PerlIO_error(n)) {
2815 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2820 b->posn += (p - buf);
2822 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2823 STDCHAR *buf = PerlIO_get_base(f);
2825 * Note position change
2827 b->posn += (b->ptr - buf);
2828 if (b->ptr < b->end) {
2830 * We did not consume all of it
2832 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2833 b->posn = PerlIO_tell(PerlIONext(f));
2837 b->ptr = b->end = b->buf;
2838 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2840 * FIXME: Is this right for read case ?
2842 if (PerlIO_flush(PerlIONext(f)) != 0)
2848 PerlIOBuf_fill(PerlIO *f)
2850 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2851 PerlIO *n = PerlIONext(f);
2854 * FIXME: doing the down-stream flush is a bad idea if it causes
2855 * pre-read data in stdio buffer to be discarded but this is too
2856 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2857 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2859 if (PerlIO_flush(f) != 0)
2861 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2862 PerlIOBase_flush_linebuf();
2865 PerlIO_get_base(f); /* allocate via vtable */
2867 b->ptr = b->end = b->buf;
2868 if (PerlIO_fast_gets(n)) {
2870 * Layer below is also buffered We do _NOT_ want to call its
2871 * ->Read() because that will loop till it gets what we asked for
2872 * which may hang on a pipe etc. Instead take anything it has to
2873 * hand, or ask it to fill _once_.
2875 avail = PerlIO_get_cnt(n);
2877 avail = PerlIO_fill(n);
2879 avail = PerlIO_get_cnt(n);
2881 if (!PerlIO_error(n) && PerlIO_eof(n))
2886 STDCHAR *ptr = PerlIO_get_ptr(n);
2887 SSize_t cnt = avail;
2888 if (avail > b->bufsiz)
2890 Copy(ptr, b->buf, avail, STDCHAR);
2891 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2895 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2899 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2901 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2904 b->end = b->buf + avail;
2905 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2910 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2912 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2916 return PerlIOBase_read(f, vbuf, count);
2922 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2924 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2925 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2928 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2933 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2935 * Buffer is already a read buffer, we can overwrite any chars
2936 * which have been read back to buffer start
2938 avail = (b->ptr - b->buf);
2942 * Buffer is idle, set it up so whole buffer is available for
2946 b->end = b->buf + avail;
2948 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2950 * Buffer extends _back_ from where we are now
2952 b->posn -= b->bufsiz;
2954 if (avail > (SSize_t) count) {
2956 * If we have space for more than count, just move count
2964 * In simple stdio-like ungetc() case chars will be already
2967 if (buf != b->ptr) {
2968 Copy(buf, b->ptr, avail, STDCHAR);
2972 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2979 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2981 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2982 const STDCHAR *buf = (const STDCHAR *) vbuf;
2986 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2989 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2990 if ((SSize_t) count < avail)
2992 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2993 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3008 Copy(buf, b->ptr, avail, STDCHAR);
3015 if (b->ptr >= (b->buf + b->bufsiz))
3018 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3024 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3027 if ((code = PerlIO_flush(f)) == 0) {
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3029 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3030 code = PerlIO_seek(PerlIONext(f), offset, whence);
3032 b->posn = PerlIO_tell(PerlIONext(f));
3039 PerlIOBuf_tell(PerlIO *f)
3041 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3043 * b->posn is file position where b->buf was read, or will be written
3045 Off_t posn = b->posn;
3048 * If buffer is valid adjust position by amount in buffer
3050 posn += (b->ptr - b->buf);
3056 PerlIOBuf_close(PerlIO *f)
3058 IV code = PerlIOBase_close(f);
3059 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3060 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3061 PerlMemShared_free(b->buf);
3064 b->ptr = b->end = b->buf;
3065 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3070 PerlIOBuf_get_ptr(PerlIO *f)
3072 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3079 PerlIOBuf_get_cnt(PerlIO *f)
3081 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3084 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3085 return (b->end - b->ptr);
3090 PerlIOBuf_get_base(PerlIO *f)
3092 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3096 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
3098 b->buf = (STDCHAR *) & b->oneword;
3099 b->bufsiz = sizeof(b->oneword);
3108 PerlIOBuf_bufsiz(PerlIO *f)
3110 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3113 return (b->end - b->buf);
3117 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3119 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3123 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3125 assert(PerlIO_get_cnt(f) == cnt);
3126 assert(b->ptr >= b->buf);
3128 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3132 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3134 return PerlIOBase_dup(aTHX_ f, o, param);
3139 PerlIO_funcs PerlIO_perlio = {
3159 PerlIOBase_clearerr,
3160 PerlIOBase_setlinebuf,
3165 PerlIOBuf_set_ptrcnt,
3168 /*--------------------------------------------------------------------------------------*/
3170 * Temp layer to hold unread chars when cannot do it any other way
3174 PerlIOPending_fill(PerlIO *f)
3177 * Should never happen
3184 PerlIOPending_close(PerlIO *f)
3187 * A tad tricky - flush pops us, then we close new top
3190 return PerlIO_close(f);
3194 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3197 * A tad tricky - flush pops us, then we seek new top
3200 return PerlIO_seek(f, offset, whence);
3205 PerlIOPending_flush(PerlIO *f)
3208 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3209 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3210 PerlMemShared_free(b->buf);
3213 PerlIO_pop(aTHX_ f);
3218 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3224 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3229 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3231 IV code = PerlIOBase_pushed(f, mode, arg);
3232 PerlIOl *l = PerlIOBase(f);
3234 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3235 * etc. get muddled when it changes mid-string when we auto-pop.
3237 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3238 (PerlIOBase(PerlIONext(f))->
3239 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3244 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3246 SSize_t avail = PerlIO_get_cnt(f);
3251 got = PerlIOBuf_read(f, vbuf, avail);
3252 if (got >= 0 && got < count) {
3254 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3255 if (more >= 0 || got == 0)
3261 PerlIO_funcs PerlIO_pending = {
3265 PerlIOPending_pushed,
3276 PerlIOPending_close,
3277 PerlIOPending_flush,
3281 PerlIOBase_clearerr,
3282 PerlIOBase_setlinebuf,
3287 PerlIOPending_set_ptrcnt,
3292 /*--------------------------------------------------------------------------------------*/
3294 * crlf - translation On read translate CR,LF to "\n" we do this by
3295 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3296 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3300 PerlIOBuf base; /* PerlIOBuf stuff */
3301 STDCHAR *nl; /* Position of crlf we "lied" about in the
3306 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3309 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3310 code = PerlIOBuf_pushed(f, mode, arg);
3312 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3313 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3314 PerlIOBase(f)->flags);
3321 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3323 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3328 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3329 return PerlIOBuf_unread(f, vbuf, count);
3331 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3332 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3334 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3339 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3340 b->end = b->ptr = b->buf + b->bufsiz;
3341 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3342 b->posn -= b->bufsiz;
3344 while (count > 0 && b->ptr > b->buf) {
3347 if (b->ptr - 2 >= b->buf) {
3370 PerlIOCrlf_get_cnt(PerlIO *f)
3372 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3375 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3376 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3377 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3378 STDCHAR *nl = b->ptr;
3380 while (nl < b->end && *nl != 0xd)
3382 if (nl < b->end && *nl == 0xd) {
3384 if (nl + 1 < b->end) {
3391 * Not CR,LF but just CR
3399 * Blast - found CR as last char in buffer
3403 * They may not care, defer work as long as
3406 return (nl - b->ptr);
3410 b->ptr++; /* say we have read it as far as
3411 * flush() is concerned */
3412 b->buf++; /* Leave space an front of buffer */
3413 b->bufsiz--; /* Buffer is thus smaller */
3414 code = PerlIO_fill(f); /* Fetch some more */
3415 b->bufsiz++; /* Restore size for next time */
3416 b->buf--; /* Point at space */
3417 b->ptr = nl = b->buf; /* Which is what we hand
3419 b->posn--; /* Buffer starts here */
3420 *nl = 0xd; /* Fill in the CR */
3422 goto test; /* fill() call worked */
3424 * CR at EOF - just fall through
3430 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3436 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3438 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3439 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3440 IV flags = PerlIOBase(f)->flags;
3448 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3455 * Test code - delete when it works ...
3462 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3469 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3470 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3477 * They have taken what we lied about
3485 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3489 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3491 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3492 return PerlIOBuf_write(f, vbuf, count);
3494 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3495 const STDCHAR *buf = (const STDCHAR *) vbuf;
3496 const STDCHAR *ebuf = buf + count;
3499 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3501 while (buf < ebuf) {
3502 STDCHAR *eptr = b->buf + b->bufsiz;
3503 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3504 while (buf < ebuf && b->ptr < eptr) {
3506 if ((b->ptr + 2) > eptr) {
3514 *(b->ptr)++ = 0xd; /* CR */
3515 *(b->ptr)++ = 0xa; /* LF */
3517 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3527 if (b->ptr >= eptr) {
3533 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3535 return (buf - (STDCHAR *) vbuf);
3540 PerlIOCrlf_flush(PerlIO *f)
3542 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3547 return PerlIOBuf_flush(f);
3550 PerlIO_funcs PerlIO_crlf = {
3553 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3555 PerlIOBase_noop_ok, /* popped */
3560 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3562 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3563 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3571 PerlIOBase_clearerr,
3572 PerlIOBase_setlinebuf,
3577 PerlIOCrlf_set_ptrcnt,
3581 /*--------------------------------------------------------------------------------------*/
3583 * mmap as "buffer" layer
3587 PerlIOBuf base; /* PerlIOBuf stuff */
3588 Mmap_t mptr; /* Mapped address */
3589 Size_t len; /* mapped length */
3590 STDCHAR *bbuf; /* malloced buffer if map fails */
3593 static size_t page_size = 0;
3596 PerlIOMmap_map(PerlIO *f)
3599 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3600 IV flags = PerlIOBase(f)->flags;
3604 if (flags & PERLIO_F_CANREAD) {
3605 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3606 int fd = PerlIO_fileno(f);
3608 code = fstat(fd, &st);
3609 if (code == 0 && S_ISREG(st.st_mode)) {
3610 SSize_t len = st.st_size - b->posn;
3614 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3616 SETERRNO(0, SS$_NORMAL);
3617 # ifdef _SC_PAGESIZE
3618 page_size = sysconf(_SC_PAGESIZE);
3620 page_size = sysconf(_SC_PAGE_SIZE);
3622 if ((long) page_size < 0) {
3627 (void) SvUPGRADE(error, SVt_PV);
3628 msg = SvPVx(error, n_a);
3629 Perl_croak(aTHX_ "panic: sysconf: %s",
3634 "panic: sysconf: pagesize unknown");
3638 # ifdef HAS_GETPAGESIZE
3639 page_size = getpagesize();
3641 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3642 page_size = PAGESIZE; /* compiletime, bad */
3646 if ((IV) page_size <= 0)
3647 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3652 * This is a hack - should never happen - open should
3655 b->posn = PerlIO_tell(PerlIONext(f));
3657 posn = (b->posn / page_size) * page_size;
3658 len = st.st_size - posn;
3659 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3660 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3661 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3662 madvise(m->mptr, len, MADV_SEQUENTIAL);
3664 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3665 madvise(m->mptr, len, MADV_WILLNEED);
3667 PerlIOBase(f)->flags =
3668 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3669 b->end = ((STDCHAR *) m->mptr) + len;
3670 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3679 PerlIOBase(f)->flags =
3680 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3682 b->ptr = b->end = b->ptr;
3691 PerlIOMmap_unmap(PerlIO *f)
3693 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3694 PerlIOBuf *b = &m->base;
3698 code = munmap(m->mptr, m->len);
3702 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3705 b->ptr = b->end = b->buf;
3706 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3712 PerlIOMmap_get_base(PerlIO *f)
3714 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3715 PerlIOBuf *b = &m->base;
3716 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3718 * Already have a readbuffer in progress
3724 * We have a write buffer or flushed PerlIOBuf read buffer
3726 m->bbuf = b->buf; /* save it in case we need it again */
3727 b->buf = NULL; /* Clear to trigger below */
3730 PerlIOMmap_map(f); /* Try and map it */
3733 * Map did not work - recover PerlIOBuf buffer if we have one
3738 b->ptr = b->end = b->buf;
3741 return PerlIOBuf_get_base(f);
3745 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3747 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3748 PerlIOBuf *b = &m->base;
3749 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3751 if (b->ptr && (b->ptr - count) >= b->buf
3752 && memEQ(b->ptr - count, vbuf, count)) {
3754 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3759 * Loose the unwritable mapped buffer
3763 * If flush took the "buffer" see if we have one from before
3765 if (!b->buf && m->bbuf)
3768 PerlIOBuf_get_base(f);
3772 return PerlIOBuf_unread(f, vbuf, count);
3776 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3778 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3779 PerlIOBuf *b = &m->base;
3780 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3782 * No, or wrong sort of, buffer
3785 if (PerlIOMmap_unmap(f) != 0)
3789 * If unmap took the "buffer" see if we have one from before
3791 if (!b->buf && m->bbuf)
3794 PerlIOBuf_get_base(f);
3798 return PerlIOBuf_write(f, vbuf, count);
3802 PerlIOMmap_flush(PerlIO *f)
3804 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3805 PerlIOBuf *b = &m->base;
3806 IV code = PerlIOBuf_flush(f);
3808 * Now we are "synced" at PerlIOBuf level
3815 if (PerlIOMmap_unmap(f) != 0)
3820 * We seem to have a PerlIOBuf buffer which was not mapped
3821 * remember it in case we need one later
3830 PerlIOMmap_fill(PerlIO *f)
3832 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3833 IV code = PerlIO_flush(f);
3834 if (code == 0 && !b->buf) {
3835 code = PerlIOMmap_map(f);
3837 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3838 code = PerlIOBuf_fill(f);
3844 PerlIOMmap_close(PerlIO *f)
3846 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3847 PerlIOBuf *b = &m->base;
3848 IV code = PerlIO_flush(f);
3852 b->ptr = b->end = b->buf;
3854 if (PerlIOBuf_close(f) != 0)
3860 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3862 return PerlIOBase_dup(aTHX_ f, o, param);
3866 PerlIO_funcs PerlIO_mmap = {
3886 PerlIOBase_clearerr,
3887 PerlIOBase_setlinebuf,
3888 PerlIOMmap_get_base,
3892 PerlIOBuf_set_ptrcnt,
3895 #endif /* HAS_MMAP */
3902 call_atexit(PerlIO_cleanup_layers, NULL);
3906 atexit(&PerlIO_cleanup);
3917 PerlIO_stdstreams(aTHX);
3922 #undef PerlIO_stdout
3928 PerlIO_stdstreams(aTHX);
3933 #undef PerlIO_stderr
3939 PerlIO_stdstreams(aTHX);
3944 /*--------------------------------------------------------------------------------------*/
3946 #undef PerlIO_getname
3948 PerlIO_getname(PerlIO *f, char *buf)
3953 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3955 name = fgetname(stdio, buf);
3957 Perl_croak(aTHX_ "Don't know how to get file name");
3963 /*--------------------------------------------------------------------------------------*/
3965 * Functions which can be called on any kind of PerlIO implemented in
3971 PerlIO_getc(PerlIO *f)
3974 SSize_t count = PerlIO_read(f, buf, 1);
3976 return (unsigned char) buf[0];
3981 #undef PerlIO_ungetc
3983 PerlIO_ungetc(PerlIO *f, int ch)
3987 if (PerlIO_unread(f, &buf, 1) == 1)
3995 PerlIO_putc(PerlIO *f, int ch)
3998 return PerlIO_write(f, &buf, 1);
4003 PerlIO_puts(PerlIO *f, const char *s)
4005 STRLEN len = strlen(s);
4006 return PerlIO_write(f, s, len);
4009 #undef PerlIO_rewind
4011 PerlIO_rewind(PerlIO *f)
4013 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4017 #undef PerlIO_vprintf
4019 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4022 SV *sv = newSVpvn("", 0);
4028 Perl_va_copy(ap, apc);
4029 sv_vcatpvf(sv, fmt, &apc);
4031 sv_vcatpvf(sv, fmt, &ap);
4034 wrote = PerlIO_write(f, s, len);
4039 #undef PerlIO_printf
4041 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4046 result = PerlIO_vprintf(f, fmt, ap);
4051 #undef PerlIO_stdoutf
4053 PerlIO_stdoutf(const char *fmt, ...)
4058 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4063 #undef PerlIO_tmpfile
4065 PerlIO_tmpfile(void)
4068 * I have no idea how portable mkstemp() is ...
4070 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4073 FILE *stdio = PerlSIO_tmpfile();
4076 PerlIOSelf(PerlIO_push
4077 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4078 "w+", Nullsv), PerlIOStdio);
4084 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4085 int fd = mkstemp(SvPVX(sv));
4088 f = PerlIO_fdopen(fd, "w+");
4090 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4092 PerlLIO_unlink(SvPVX(sv));
4102 #endif /* USE_SFIO */
4103 #endif /* PERLIO_IS_STDIO */
4105 /*======================================================================================*/
4107 * Now some functions in terms of above which may be needed even if we are
4108 * not in true PerlIO mode
4112 #undef PerlIO_setpos
4114 PerlIO_setpos(PerlIO *f, SV *pos)
4119 Off_t *posn = (Off_t *) SvPV(pos, len);
4120 if (f && len == sizeof(Off_t))
4121 return PerlIO_seek(f, *posn, SEEK_SET);
4123 SETERRNO(EINVAL, SS$_IVCHAN);
4127 #undef PerlIO_setpos
4129 PerlIO_setpos(PerlIO *f, SV *pos)
4134 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4135 if (f && len == sizeof(Fpos_t)) {
4136 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4137 return fsetpos64(f, fpos);
4139 return fsetpos(f, fpos);
4143 SETERRNO(EINVAL, SS$_IVCHAN);
4149 #undef PerlIO_getpos
4151 PerlIO_getpos(PerlIO *f, SV *pos)
4154 Off_t posn = PerlIO_tell(f);
4155 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4156 return (posn == (Off_t) - 1) ? -1 : 0;
4159 #undef PerlIO_getpos
4161 PerlIO_getpos(PerlIO *f, SV *pos)
4166 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4167 code = fgetpos64(f, &fpos);
4169 code = fgetpos(f, &fpos);
4171 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4176 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4179 vprintf(char *pat, char *args)
4181 _doprnt(pat, args, stdout);
4182 return 0; /* wrong, but perl doesn't use the return
4187 vfprintf(FILE *fd, char *pat, char *args)
4189 _doprnt(pat, args, fd);
4190 return 0; /* wrong, but perl doesn't use the return
4196 #ifndef PerlIO_vsprintf
4198 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4200 int val = vsprintf(s, fmt, ap);
4202 if (strlen(s) >= (STRLEN) n) {
4204 (void) PerlIO_puts(Perl_error_log,
4205 "panic: sprintf overflow - memory corrupted!\n");
4213 #ifndef PerlIO_sprintf
4215 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4220 result = PerlIO_vsprintf(s, n, fmt, ap);