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 #define PERLIO_TABLE_SIZE 64
411 PerlIO_allocate(pTHX)
414 * Find a free slot in the table, allocating new table as necessary
419 while ((f = *last)) {
421 last = (PerlIO **) (f);
422 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
428 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
436 #undef PerlIO_fdupopen
438 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
441 PerlIO_funcs *tab = PerlIOBase(f)->tab;
443 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
444 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
448 SETERRNO(EBADF, SS$_IVCHAN);
454 PerlIO_cleantable(pTHX_ PerlIO **tablep)
456 PerlIO *table = *tablep;
459 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
460 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
461 PerlIO *f = table + i;
473 PerlIO_list_alloc(pTHX)
476 Newz('L', list, 1, PerlIO_list_t);
482 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
485 if (--list->refcnt == 0) {
488 for (i = 0; i < list->cur; i++) {
489 if (list->array[i].arg)
490 SvREFCNT_dec(list->array[i].arg);
492 Safefree(list->array);
500 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
503 if (list->cur >= list->len) {
506 Renew(list->array, list->len, PerlIO_pair_t);
508 New('l', list->array, list->len, PerlIO_pair_t);
510 p = &(list->array[list->cur++]);
512 if ((p->arg = arg)) {
518 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
520 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
523 list = PerlIO_list_alloc(aTHX);
524 for (i=0; i < proto->cur; i++) {
526 if (proto->array[i].arg)
527 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
528 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
535 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
538 PerlIO **table = &proto->Iperlio;
541 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
542 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
543 PerlIO_allocate(aTHX); /* root slot is never used */
544 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
545 while ((f = *table)) {
547 table = (PerlIO **) (f++);
548 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
550 (void) fp_dup(f, 0, param);
559 PerlIO_destruct(pTHX)
561 PerlIO **table = &PL_perlio;
564 PerlIO_debug("Destruct %p\n",aTHX);
566 while ((f = *table)) {
568 table = (PerlIO **) (f++);
569 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
573 if (l->tab->kind & PERLIO_K_DESTRUCT) {
574 PerlIO_debug("Destruct popping %s\n", l->tab->name);
585 PerlIO_list_free(aTHX_ PL_known_layers);
586 PL_known_layers = NULL;
587 PerlIO_list_free(aTHX_ PL_def_layerlist);
588 PL_def_layerlist = NULL;
592 PerlIO_pop(pTHX_ PerlIO *f)
596 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
597 if (l->tab->Popped) {
599 * If popped returns non-zero do not free its layer structure
600 * it has either done so itself, or it is shared and still in
603 if ((*l->tab->Popped) (f) != 0)
611 /*--------------------------------------------------------------------------------------*/
613 * XS Interface for perl code
617 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
620 if ((SSize_t) len <= 0)
622 for (i = 0; i < PL_known_layers->cur; i++) {
623 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
624 if (memEQ(f->name, name, len)) {
625 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
629 if (load && PL_subname && PL_def_layerlist
630 && PL_def_layerlist->cur >= 2) {
631 SV *pkgsv = newSVpvn("PerlIO", 6);
632 SV *layer = newSVpvn(name, len);
635 * The two SVs are magically freed by load_module
637 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
639 return PerlIO_find_layer(aTHX_ name, len, 0);
641 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
645 #ifdef USE_ATTRIBUTES_FOR_PERLIO
648 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
651 IO *io = GvIOn((GV *) SvRV(sv));
652 PerlIO *ifp = IoIFP(io);
653 PerlIO *ofp = IoOFP(io);
654 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
660 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
663 IO *io = GvIOn((GV *) SvRV(sv));
664 PerlIO *ifp = IoIFP(io);
665 PerlIO *ofp = IoOFP(io);
666 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
672 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
674 Perl_warn(aTHX_ "clear %" SVf, sv);
679 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
681 Perl_warn(aTHX_ "free %" SVf, sv);
685 MGVTBL perlio_vtab = {
693 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
696 SV *sv = SvRV(ST(1));
701 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
703 mg = mg_find(sv, PERL_MAGIC_ext);
704 mg->mg_virtual = &perlio_vtab;
706 Perl_warn(aTHX_ "attrib %" SVf, sv);
707 for (i = 2; i < items; i++) {
709 const char *name = SvPV(ST(i), len);
710 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
712 av_push(av, SvREFCNT_inc(layer));
723 #endif /* USE_ATTIBUTES_FOR_PERLIO */
726 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
728 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
729 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
733 XS(XS_PerlIO__Layer__find)
737 Perl_croak(aTHX_ "Usage class->find(name[,load])");
740 char *name = SvPV(ST(1), len);
741 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
742 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
744 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
751 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
753 if (!PL_known_layers)
754 PL_known_layers = PerlIO_list_alloc(aTHX);
755 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
756 PerlIO_debug("define %s %p\n", tab->name, tab);
760 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
763 const char *s = names;
765 while (isSPACE(*s) || *s == ':')
770 const char *as = Nullch;
772 if (!isIDFIRST(*s)) {
774 * Message is consistent with how attribute lists are
775 * passed. Even though this means "foo : : bar" is
776 * seen as an invalid separator character.
778 char q = ((*s == '\'') ? '"' : '\'');
780 "perlio: invalid separator character %c%c%c in layer specification list",
786 } while (isALNUM(*e));
802 * It's a nul terminated string, not allowed
803 * to \ the terminating null. Anything other
804 * character is passed over.
815 "perlio: argument list not closed for layer \"%.*s\"",
827 PerlIO_funcs *layer =
828 PerlIO_find_layer(aTHX_ s, llen, 1);
830 PerlIO_list_push(aTHX_ av, layer,
836 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
849 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
851 PerlIO_funcs *tab = &PerlIO_perlio;
852 if (O_BINARY != O_TEXT) {
856 if (PerlIO_stdio.Set_ptrcnt) {
860 PerlIO_debug("Pushing %s\n", tab->name);
861 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
866 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
868 return av->array[n].arg;
872 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
874 if (n >= 0 && n < av->cur) {
875 PerlIO_debug("Layer %" IVdf " is %s\n", n,
876 av->array[n].funcs->name);
877 return av->array[n].funcs;
880 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
885 PerlIO_default_layers(pTHX)
887 if (!PL_def_layerlist) {
888 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
889 PerlIO_funcs *osLayer = &PerlIO_unix;
890 PL_def_layerlist = PerlIO_list_alloc(aTHX);
891 PerlIO_define_layer(aTHX_ & PerlIO_unix);
892 #if defined(WIN32) && !defined(UNDER_CE)
893 PerlIO_define_layer(aTHX_ & PerlIO_win32);
895 osLayer = &PerlIO_win32;
898 PerlIO_define_layer(aTHX_ & PerlIO_raw);
899 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
900 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
901 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
903 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
905 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
906 PerlIO_define_layer(aTHX_ & PerlIO_byte);
907 PerlIO_list_push(aTHX_ PL_def_layerlist,
908 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
911 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
914 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
917 if (PL_def_layerlist->cur < 2) {
918 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
920 return PL_def_layerlist;
924 Perl_boot_core_PerlIO(pTHX)
926 #ifdef USE_ATTRIBUTES_FOR_PERLIO
927 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
930 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
934 PerlIO_default_layer(pTHX_ I32 n)
936 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
939 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
942 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
943 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
946 PerlIO_stdstreams(pTHX)
949 PerlIO_allocate(aTHX);
950 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
951 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
952 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
957 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
960 Newc('L',l,tab->size,char,PerlIOl);
962 Zero(l, tab->size, char);
966 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
967 (mode) ? mode : "(Null)", arg);
968 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
977 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
990 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
993 * Remove the dummy layer
998 * Pop back to bottom layer
1002 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1003 if (*PerlIONext(f)) {
1004 PerlIO_pop(aTHX_ f);
1008 * Nothing bellow - push unix on top then remove it
1010 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1011 PerlIO_pop(aTHX_ PerlIONext(f));
1016 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1023 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1024 PerlIO_list_t *layers, IV n)
1026 IV max = layers->cur;
1029 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1031 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1042 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1046 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1047 code = PerlIO_parse_layers(aTHX_ layers, names);
1049 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1051 PerlIO_list_free(aTHX_ layers);
1057 /*--------------------------------------------------------------------------------------*/
1059 * Given the abstraction above the public API functions
1063 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1065 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1066 f, PerlIOBase(f)->tab->name, iotype, mode,
1067 (names) ? names : "(Null)");
1069 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1072 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1073 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1076 top = PerlIONext(top);
1080 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1083 #undef PerlIO__close
1085 PerlIO__close(PerlIO *f)
1088 return (*PerlIOBase(f)->tab->Close) (f);
1090 SETERRNO(EBADF, SS$_IVCHAN);
1097 PerlIO_close(PerlIO *f)
1102 code = (*PerlIOBase(f)->tab->Close) (f);
1104 PerlIO_pop(aTHX_ f);
1110 #undef PerlIO_fileno
1112 PerlIO_fileno(PerlIO *f)
1115 return (*PerlIOBase(f)->tab->Fileno) (f);
1117 SETERRNO(EBADF, SS$_IVCHAN);
1123 PerlIO_context_layers(pTHX_ const char *mode)
1125 const char *type = NULL;
1127 * Need to supply default layer info from open.pm
1130 SV *layers = PL_curcop->cop_io;
1133 type = SvPV(layers, len);
1134 if (type && mode[0] != 'r') {
1136 * Skip to write part
1138 const char *s = strchr(type, 0);
1139 if (s && (s - type) < len) {
1148 static PerlIO_funcs *
1149 PerlIO_layer_from_ref(pTHX_ SV *sv)
1152 * For any scalar type load the handler which is bundled with perl
1154 if (SvTYPE(sv) < SVt_PVAV)
1155 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1158 * For other types allow if layer is known but don't try and load it
1160 switch (SvTYPE(sv)) {
1162 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1164 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1166 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1168 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1174 PerlIO_resolve_layers(pTHX_ const char *layers,
1175 const char *mode, int narg, SV **args)
1177 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1180 PerlIO_stdstreams(aTHX);
1184 * If it is a reference but not an object see if we have a handler
1187 if (SvROK(arg) && !sv_isobject(arg)) {
1188 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1190 def = PerlIO_list_alloc(aTHX);
1191 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1195 * Don't fail if handler cannot be found :Via(...) etc. may do
1196 * something sensible else we will just stringfy and open
1202 layers = PerlIO_context_layers(aTHX_ mode);
1203 if (layers && *layers) {
1207 av = PerlIO_list_alloc(aTHX);
1208 for (i = 0; i < def->cur; i++) {
1209 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1216 PerlIO_parse_layers(aTHX_ av, layers);
1227 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1228 int imode, int perm, PerlIO *f, int narg, SV **args)
1230 if (!f && narg == 1 && *args == &PL_sv_undef) {
1231 if ((f = PerlIO_tmpfile())) {
1233 layers = PerlIO_context_layers(aTHX_ mode);
1234 if (layers && *layers)
1235 PerlIO_apply_layers(aTHX_ f, mode, layers);
1239 PerlIO_list_t *layera = NULL;
1241 PerlIO_funcs *tab = NULL;
1244 * This is "reopen" - it is not tested as perl does not use it
1248 layera = PerlIO_list_alloc(aTHX);
1251 (l->tab->Getarg) ? (*l->tab->
1252 Getarg) (&l) : &PL_sv_undef;
1253 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1254 l = *PerlIONext(&l);
1258 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1261 * Start at "top" of layer stack
1263 n = layera->cur - 1;
1265 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1274 * Found that layer 'n' can do opens - call it
1276 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1277 tab->name, layers, mode, fd, imode, perm, f, narg,
1279 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1282 if (n + 1 < layera->cur) {
1284 * More layers above the one that we used to open -
1287 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1294 PerlIO_list_free(aTHX_ layera);
1300 #undef PerlIO_fdopen
1302 PerlIO_fdopen(int fd, const char *mode)
1305 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1310 PerlIO_open(const char *path, const char *mode)
1313 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1314 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1317 #undef PerlIO_reopen
1319 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1322 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1323 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1328 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1331 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1333 SETERRNO(EBADF, SS$_IVCHAN);
1338 #undef PerlIO_unread
1340 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1343 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1345 SETERRNO(EBADF, SS$_IVCHAN);
1352 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1355 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1357 SETERRNO(EBADF, SS$_IVCHAN);
1364 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1367 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1369 SETERRNO(EBADF, SS$_IVCHAN);
1376 PerlIO_tell(PerlIO *f)
1379 return (*PerlIOBase(f)->tab->Tell) (f);
1381 SETERRNO(EBADF, SS$_IVCHAN);
1388 PerlIO_flush(PerlIO *f)
1392 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1393 if (tab && tab->Flush) {
1394 return (*tab->Flush) (f);
1397 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1398 SETERRNO(EBADF, SS$_IVCHAN);
1403 PerlIO_debug("Cannot flush f=%p\n", f);
1404 SETERRNO(EBADF, SS$_IVCHAN);
1410 * Is it good API design to do flush-all on NULL, a potentially
1411 * errorneous input? Maybe some magical value (PerlIO*
1412 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1413 * things on fflush(NULL), but should we be bound by their design
1417 PerlIO **table = &PL_perlio;
1419 while ((f = *table)) {
1421 table = (PerlIO **) (f++);
1422 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1423 if (*f && PerlIO_flush(f) != 0)
1433 PerlIOBase_flush_linebuf()
1436 PerlIO **table = &PL_perlio;
1438 while ((f = *table)) {
1440 table = (PerlIO **) (f++);
1441 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1444 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1445 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1454 PerlIO_fill(PerlIO *f)
1457 return (*PerlIOBase(f)->tab->Fill) (f);
1459 SETERRNO(EBADF, SS$_IVCHAN);
1464 #undef PerlIO_isutf8
1466 PerlIO_isutf8(PerlIO *f)
1469 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1471 SETERRNO(EBADF, SS$_IVCHAN);
1478 PerlIO_eof(PerlIO *f)
1481 return (*PerlIOBase(f)->tab->Eof) (f);
1483 SETERRNO(EBADF, SS$_IVCHAN);
1490 PerlIO_error(PerlIO *f)
1493 return (*PerlIOBase(f)->tab->Error) (f);
1495 SETERRNO(EBADF, SS$_IVCHAN);
1500 #undef PerlIO_clearerr
1502 PerlIO_clearerr(PerlIO *f)
1505 (*PerlIOBase(f)->tab->Clearerr) (f);
1507 SETERRNO(EBADF, SS$_IVCHAN);
1510 #undef PerlIO_setlinebuf
1512 PerlIO_setlinebuf(PerlIO *f)
1515 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1517 SETERRNO(EBADF, SS$_IVCHAN);
1520 #undef PerlIO_has_base
1522 PerlIO_has_base(PerlIO *f)
1525 return (PerlIOBase(f)->tab->Get_base != NULL);
1530 #undef PerlIO_fast_gets
1532 PerlIO_fast_gets(PerlIO *f)
1534 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1535 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1536 return (tab->Set_ptrcnt != NULL);
1541 #undef PerlIO_has_cntptr
1543 PerlIO_has_cntptr(PerlIO *f)
1546 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1547 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1552 #undef PerlIO_canset_cnt
1554 PerlIO_canset_cnt(PerlIO *f)
1557 PerlIOl *l = PerlIOBase(f);
1558 return (l->tab->Set_ptrcnt != NULL);
1563 #undef PerlIO_get_base
1565 PerlIO_get_base(PerlIO *f)
1568 return (*PerlIOBase(f)->tab->Get_base) (f);
1572 #undef PerlIO_get_bufsiz
1574 PerlIO_get_bufsiz(PerlIO *f)
1577 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1581 #undef PerlIO_get_ptr
1583 PerlIO_get_ptr(PerlIO *f)
1585 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1586 if (tab->Get_ptr == NULL)
1588 return (*tab->Get_ptr) (f);
1591 #undef PerlIO_get_cnt
1593 PerlIO_get_cnt(PerlIO *f)
1595 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1596 if (tab->Get_cnt == NULL)
1598 return (*tab->Get_cnt) (f);
1601 #undef PerlIO_set_cnt
1603 PerlIO_set_cnt(PerlIO *f, int cnt)
1605 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1608 #undef PerlIO_set_ptrcnt
1610 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1612 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1613 if (tab->Set_ptrcnt == NULL) {
1615 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1617 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1620 /*--------------------------------------------------------------------------------------*/
1622 * utf8 and raw dummy layers
1626 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1628 if (PerlIONext(f)) {
1630 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1631 PerlIO_pop(aTHX_ f);
1632 if (tab->kind & PERLIO_K_UTF8)
1633 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1635 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1641 PerlIO_funcs PerlIO_utf8 = {
1644 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1662 NULL, /* get_base */
1663 NULL, /* get_bufsiz */
1666 NULL, /* set_ptrcnt */
1669 PerlIO_funcs PerlIO_byte = {
1690 NULL, /* get_base */
1691 NULL, /* get_bufsiz */
1694 NULL, /* set_ptrcnt */
1698 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1699 IV n, const char *mode, int fd, int imode, int perm,
1700 PerlIO *old, int narg, SV **args)
1702 PerlIO_funcs *tab = PerlIO_default_btm();
1703 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1707 PerlIO_funcs PerlIO_raw = {
1728 NULL, /* get_base */
1729 NULL, /* get_bufsiz */
1732 NULL, /* set_ptrcnt */
1734 /*--------------------------------------------------------------------------------------*/
1735 /*--------------------------------------------------------------------------------------*/
1737 * "Methods" of the "base class"
1741 PerlIOBase_fileno(PerlIO *f)
1743 return PerlIO_fileno(PerlIONext(f));
1747 PerlIO_modestr(PerlIO *f, char *buf)
1750 IV flags = PerlIOBase(f)->flags;
1751 if (flags & PERLIO_F_APPEND) {
1753 if (flags & PERLIO_F_CANREAD) {
1757 else if (flags & PERLIO_F_CANREAD) {
1759 if (flags & PERLIO_F_CANWRITE)
1762 else if (flags & PERLIO_F_CANWRITE) {
1764 if (flags & PERLIO_F_CANREAD) {
1768 #if O_TEXT != O_BINARY
1769 if (!(flags & PERLIO_F_CRLF))
1777 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1779 PerlIOl *l = PerlIOBase(f);
1781 const char *omode = mode;
1784 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1785 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1786 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1787 if (tab->Set_ptrcnt != NULL)
1788 l->flags |= PERLIO_F_FASTGETS;
1790 if (*mode == '#' || *mode == 'I')
1794 l->flags |= PERLIO_F_CANREAD;
1797 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1800 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1803 SETERRNO(EINVAL, LIB$_INVARG);
1809 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1812 l->flags &= ~PERLIO_F_CRLF;
1815 l->flags |= PERLIO_F_CRLF;
1818 SETERRNO(EINVAL, LIB$_INVARG);
1825 l->flags |= l->next->flags &
1826 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1831 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1832 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1833 l->flags, PerlIO_modestr(f, temp));
1839 PerlIOBase_popped(PerlIO *f)
1845 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1849 * Save the position as current head considers it
1851 Off_t old = PerlIO_tell(f);
1853 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1854 PerlIOSelf(f, PerlIOBuf)->posn = old;
1855 done = PerlIOBuf_unread(f, vbuf, count);
1860 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1862 STDCHAR *buf = (STDCHAR *) vbuf;
1864 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1867 SSize_t avail = PerlIO_get_cnt(f);
1870 take = (count < avail) ? count : avail;
1872 STDCHAR *ptr = PerlIO_get_ptr(f);
1873 Copy(ptr, buf, take, STDCHAR);
1874 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1878 if (count > 0 && avail <= 0) {
1879 if (PerlIO_fill(f) != 0)
1883 return (buf - (STDCHAR *) vbuf);
1889 PerlIOBase_noop_ok(PerlIO *f)
1895 PerlIOBase_noop_fail(PerlIO *f)
1901 PerlIOBase_close(PerlIO *f)
1904 PerlIO *n = PerlIONext(f);
1905 if (PerlIO_flush(f) != 0)
1907 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1909 PerlIOBase(f)->flags &=
1910 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1915 PerlIOBase_eof(PerlIO *f)
1918 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1924 PerlIOBase_error(PerlIO *f)
1927 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1933 PerlIOBase_clearerr(PerlIO *f)
1936 PerlIO *n = PerlIONext(f);
1937 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1944 PerlIOBase_setlinebuf(PerlIO *f)
1947 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1952 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1958 return sv_dup(arg, param);
1961 return newSVsv(arg);
1964 return newSVsv(arg);
1969 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1971 PerlIO *nexto = PerlIONext(o);
1973 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1974 f = (*tab->Dup)(aTHX_ f, nexto, param);
1977 PerlIO_funcs *self = PerlIOBase(o)->tab;
1980 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1982 arg = (*self->Getarg)(o);
1984 arg = PerlIO_sv_dup(aTHX_ arg, param);
1987 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1995 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1997 perl_mutex PerlIO_mutex;
1999 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2004 /* Place holder for stdstreams call ??? */
2006 MUTEX_INIT(&PerlIO_mutex);
2011 PerlIOUnix_refcnt_inc(int fd)
2013 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2015 MUTEX_LOCK(&PerlIO_mutex);
2017 PerlIO_fd_refcnt[fd]++;
2018 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2020 MUTEX_UNLOCK(&PerlIO_mutex);
2026 PerlIOUnix_refcnt_dec(int fd)
2029 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2031 MUTEX_LOCK(&PerlIO_mutex);
2033 cnt = --PerlIO_fd_refcnt[fd];
2034 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2036 MUTEX_UNLOCK(&PerlIO_mutex);
2043 PerlIO_cleanup(pTHX)
2047 PerlIO_debug("Cleanup %p\n",aTHX);
2049 /* Raise STDIN..STDERR refcount so we don't close them */
2050 for (i=0; i < 3; i++)
2051 PerlIOUnix_refcnt_inc(i);
2052 PerlIO_cleantable(aTHX_ &PL_perlio);
2053 /* Restore STDIN..STDERR refcount */
2054 for (i=0; i < 3; i++)
2055 PerlIOUnix_refcnt_dec(i);
2060 /*--------------------------------------------------------------------------------------*/
2062 * Bottom-most level for UNIX-like case
2066 struct _PerlIO base; /* The generic part */
2067 int fd; /* UNIX like file descriptor */
2068 int oflags; /* open/fcntl flags */
2072 PerlIOUnix_oflags(const char *mode)
2075 if (*mode == 'I' || *mode == '#')
2080 if (*++mode == '+') {
2087 oflags = O_CREAT | O_TRUNC;
2088 if (*++mode == '+') {
2097 oflags = O_CREAT | O_APPEND;
2098 if (*++mode == '+') {
2111 else if (*mode == 't') {
2113 oflags &= ~O_BINARY;
2117 * Always open in binary mode
2120 if (*mode || oflags == -1) {
2121 SETERRNO(EINVAL, LIB$_INVARG);
2128 PerlIOUnix_fileno(PerlIO *f)
2130 return PerlIOSelf(f, PerlIOUnix)->fd;
2134 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2136 IV code = PerlIOBase_pushed(f, mode, arg);
2137 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2138 if (*PerlIONext(f)) {
2139 s->fd = PerlIO_fileno(PerlIONext(f));
2141 * XXX could (or should) we retrieve the oflags from the open file
2142 * handle rather than believing the "mode" we are passed in? XXX
2143 * Should the value on NULL mode be 0 or -1?
2145 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2147 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2152 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2153 IV n, const char *mode, int fd, int imode,
2154 int perm, PerlIO *f, int narg, SV **args)
2157 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2158 (*PerlIOBase(f)->tab->Close) (f);
2161 char *path = SvPV_nolen(*args);
2165 imode = PerlIOUnix_oflags(mode);
2169 fd = PerlLIO_open3(path, imode, perm);
2177 f = PerlIO_allocate(aTHX);
2178 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2182 s = PerlIOSelf(f, PerlIOUnix);
2185 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2186 PerlIOUnix_refcnt_inc(fd);
2192 * FIXME: pop layers ???
2200 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2202 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2204 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2205 f = PerlIOBase_dup(aTHX_ f, o, param);
2207 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2208 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2210 PerlIOUnix_refcnt_inc(fd);
2219 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2222 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2223 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2226 SSize_t len = PerlLIO_read(fd, vbuf, count);
2227 if (len >= 0 || errno != EINTR) {
2229 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2230 else if (len == 0 && count != 0)
2231 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2239 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2242 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2244 SSize_t len = PerlLIO_write(fd, vbuf, count);
2245 if (len >= 0 || errno != EINTR) {
2247 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2255 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2259 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2260 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2261 return (new == (Off_t) - 1) ? -1 : 0;
2265 PerlIOUnix_tell(PerlIO *f)
2268 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2273 PerlIOUnix_close(PerlIO *f)
2276 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2278 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2279 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2280 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2285 SETERRNO(EBADF,SS$_IVCHAN);
2288 while (PerlLIO_close(fd) != 0) {
2289 if (errno != EINTR) {
2296 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2301 PerlIO_funcs PerlIO_unix = {
2317 PerlIOBase_noop_ok, /* flush */
2318 PerlIOBase_noop_fail, /* fill */
2321 PerlIOBase_clearerr,
2322 PerlIOBase_setlinebuf,
2323 NULL, /* get_base */
2324 NULL, /* get_bufsiz */
2327 NULL, /* set_ptrcnt */
2330 /*--------------------------------------------------------------------------------------*/
2336 struct _PerlIO base;
2337 FILE *stdio; /* The stream */
2341 PerlIOStdio_fileno(PerlIO *f)
2344 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2348 PerlIOStdio_mode(const char *mode, char *tmode)
2354 if (O_BINARY != O_TEXT) {
2362 * This isn't used yet ...
2365 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2367 if (*PerlIONext(f)) {
2369 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2372 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2373 PerlIOStdio_mode(mode, tmode));
2379 return PerlIOBase_pushed(f, mode, arg);
2382 #undef PerlIO_importFILE
2384 PerlIO_importFILE(FILE *stdio, int fl)
2390 PerlIOSelf(PerlIO_push
2391 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2392 "r+", Nullsv), PerlIOStdio);
2399 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2400 IV n, const char *mode, int fd, int imode,
2401 int perm, PerlIO *f, int narg, SV **args)
2405 char *path = SvPV_nolen(*args);
2406 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2408 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2409 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2414 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2419 char *path = SvPV_nolen(*args);
2422 fd = PerlLIO_open3(path, imode, perm);
2425 FILE *stdio = PerlSIO_fopen(path, mode);
2428 PerlIOSelf(PerlIO_push
2429 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2430 (mode = PerlIOStdio_mode(mode, tmode)),
2434 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2449 stdio = PerlSIO_stdin;
2452 stdio = PerlSIO_stdout;
2455 stdio = PerlSIO_stderr;
2460 stdio = PerlSIO_fdopen(fd, mode =
2461 PerlIOStdio_mode(mode, tmode));
2465 PerlIOSelf(PerlIO_push
2466 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2467 mode, PerlIOArg), PerlIOStdio);
2469 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2478 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2480 /* This assumes no layers underneath - which is what
2481 happens, but is not how I remember it. NI-S 2001/10/16
2483 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2484 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2485 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2486 PerlIOUnix_refcnt_inc(fileno(stdio));
2492 PerlIOStdio_close(PerlIO *f)
2495 #ifdef SOCKS5_VERSION_NAME
2497 Sock_size_t optlen = sizeof(int);
2499 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2500 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2501 /* Do not close it but do flush any buffers */
2506 #ifdef SOCKS5_VERSION_NAME
2508 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2510 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2512 PerlSIO_fclose(stdio)
2521 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2524 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2527 STDCHAR *buf = (STDCHAR *) vbuf;
2529 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2530 * stdio does not do that for fread()
2532 int ch = PerlSIO_fgetc(s);
2539 got = PerlSIO_fread(vbuf, 1, count, s);
2544 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2547 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2548 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2551 int ch = *buf-- & 0xff;
2552 if (PerlSIO_ungetc(ch, s) != ch)
2561 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2564 return PerlSIO_fwrite(vbuf, 1, count,
2565 PerlIOSelf(f, PerlIOStdio)->stdio);
2569 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2572 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2573 return PerlSIO_fseek(stdio, offset, whence);
2577 PerlIOStdio_tell(PerlIO *f)
2580 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2581 return PerlSIO_ftell(stdio);
2585 PerlIOStdio_flush(PerlIO *f)
2588 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2589 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2590 return PerlSIO_fflush(stdio);
2595 * FIXME: This discards ungetc() and pre-read stuff which is not
2596 * right if this is just a "sync" from a layer above Suspect right
2597 * design is to do _this_ but not have layer above flush this
2598 * layer read-to-read
2601 * Not writeable - sync by attempting a seek
2604 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2612 PerlIOStdio_fill(PerlIO *f)
2615 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2618 * fflush()ing read-only streams can cause trouble on some stdio-s
2620 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2621 if (PerlSIO_fflush(stdio) != 0)
2624 c = PerlSIO_fgetc(stdio);
2625 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2631 PerlIOStdio_eof(PerlIO *f)
2634 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2638 PerlIOStdio_error(PerlIO *f)
2641 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2645 PerlIOStdio_clearerr(PerlIO *f)
2648 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2652 PerlIOStdio_setlinebuf(PerlIO *f)
2655 #ifdef HAS_SETLINEBUF
2656 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2658 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2664 PerlIOStdio_get_base(PerlIO *f)
2667 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2668 return PerlSIO_get_base(stdio);
2672 PerlIOStdio_get_bufsiz(PerlIO *f)
2675 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2676 return PerlSIO_get_bufsiz(stdio);
2680 #ifdef USE_STDIO_PTR
2682 PerlIOStdio_get_ptr(PerlIO *f)
2685 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2686 return PerlSIO_get_ptr(stdio);
2690 PerlIOStdio_get_cnt(PerlIO *f)
2693 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2694 return PerlSIO_get_cnt(stdio);
2698 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2700 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2703 #ifdef STDIO_PTR_LVALUE
2704 PerlSIO_set_ptr(stdio, ptr);
2705 #ifdef STDIO_PTR_LVAL_SETS_CNT
2706 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2708 assert(PerlSIO_get_cnt(stdio) == (cnt));
2711 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2713 * Setting ptr _does_ change cnt - we are done
2717 #else /* STDIO_PTR_LVALUE */
2719 #endif /* STDIO_PTR_LVALUE */
2722 * Now (or only) set cnt
2724 #ifdef STDIO_CNT_LVALUE
2725 PerlSIO_set_cnt(stdio, cnt);
2726 #else /* STDIO_CNT_LVALUE */
2727 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2728 PerlSIO_set_ptr(stdio,
2729 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2731 #else /* STDIO_PTR_LVAL_SETS_CNT */
2733 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2734 #endif /* STDIO_CNT_LVALUE */
2739 PerlIO_funcs PerlIO_stdio = {
2741 sizeof(PerlIOStdio),
2759 PerlIOStdio_clearerr,
2760 PerlIOStdio_setlinebuf,
2762 PerlIOStdio_get_base,
2763 PerlIOStdio_get_bufsiz,
2768 #ifdef USE_STDIO_PTR
2769 PerlIOStdio_get_ptr,
2770 PerlIOStdio_get_cnt,
2771 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2772 PerlIOStdio_set_ptrcnt
2773 #else /* STDIO_PTR_LVALUE */
2775 #endif /* STDIO_PTR_LVALUE */
2776 #else /* USE_STDIO_PTR */
2780 #endif /* USE_STDIO_PTR */
2783 #undef PerlIO_exportFILE
2785 PerlIO_exportFILE(PerlIO *f, int fl)
2789 stdio = fdopen(PerlIO_fileno(f), "r+");
2793 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2800 #undef PerlIO_findFILE
2802 PerlIO_findFILE(PerlIO *f)
2806 if (l->tab == &PerlIO_stdio) {
2807 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2810 l = *PerlIONext(&l);
2812 return PerlIO_exportFILE(f, 0);
2815 #undef PerlIO_releaseFILE
2817 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2821 /*--------------------------------------------------------------------------------------*/
2823 * perlio buffer layer
2827 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2830 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2831 int fd = PerlIO_fileno(f);
2833 if (fd >= 0 && PerlLIO_isatty(fd)) {
2834 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2836 posn = PerlIO_tell(PerlIONext(f));
2837 if (posn != (Off_t) - 1) {
2840 return PerlIOBase_pushed(f, mode, arg);
2844 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2845 IV n, const char *mode, int fd, int imode, int perm,
2846 PerlIO *f, int narg, SV **args)
2849 PerlIO *next = PerlIONext(f);
2851 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2853 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2856 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2862 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2870 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2873 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2874 fd = PerlIO_fileno(f);
2875 #if (O_BINARY != O_TEXT) && !defined(__BEOS__)
2877 * do something about failing setmode()? --jhi
2879 PerlLIO_setmode(fd, O_BINARY);
2881 if (init && fd == 2) {
2883 * Initial stderr is unbuffered
2885 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2893 * This "flush" is akin to sfio's sync in that it handles files in either
2894 * read or write state
2897 PerlIOBuf_flush(PerlIO *f)
2899 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2901 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2903 * write() the buffer
2905 STDCHAR *buf = b->buf;
2907 PerlIO *n = PerlIONext(f);
2908 while (p < b->ptr) {
2909 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2913 else if (count < 0 || PerlIO_error(n)) {
2914 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2919 b->posn += (p - buf);
2921 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2922 STDCHAR *buf = PerlIO_get_base(f);
2924 * Note position change
2926 b->posn += (b->ptr - buf);
2927 if (b->ptr < b->end) {
2929 * We did not consume all of it
2931 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2932 b->posn = PerlIO_tell(PerlIONext(f));
2936 b->ptr = b->end = b->buf;
2937 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2939 * FIXME: Is this right for read case ?
2941 if (PerlIO_flush(PerlIONext(f)) != 0)
2947 PerlIOBuf_fill(PerlIO *f)
2949 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2950 PerlIO *n = PerlIONext(f);
2953 * FIXME: doing the down-stream flush is a bad idea if it causes
2954 * pre-read data in stdio buffer to be discarded but this is too
2955 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2956 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2958 if (PerlIO_flush(f) != 0)
2960 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2961 PerlIOBase_flush_linebuf();
2964 PerlIO_get_base(f); /* allocate via vtable */
2966 b->ptr = b->end = b->buf;
2967 if (PerlIO_fast_gets(n)) {
2969 * Layer below is also buffered We do _NOT_ want to call its
2970 * ->Read() because that will loop till it gets what we asked for
2971 * which may hang on a pipe etc. Instead take anything it has to
2972 * hand, or ask it to fill _once_.
2974 avail = PerlIO_get_cnt(n);
2976 avail = PerlIO_fill(n);
2978 avail = PerlIO_get_cnt(n);
2980 if (!PerlIO_error(n) && PerlIO_eof(n))
2985 STDCHAR *ptr = PerlIO_get_ptr(n);
2986 SSize_t cnt = avail;
2987 if (avail > b->bufsiz)
2989 Copy(ptr, b->buf, avail, STDCHAR);
2990 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2994 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2998 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3000 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3003 b->end = b->buf + avail;
3004 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3009 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3011 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3015 return PerlIOBase_read(f, vbuf, count);
3021 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3023 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3024 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3027 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3032 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3034 * Buffer is already a read buffer, we can overwrite any chars
3035 * which have been read back to buffer start
3037 avail = (b->ptr - b->buf);
3041 * Buffer is idle, set it up so whole buffer is available for
3045 b->end = b->buf + avail;
3047 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3049 * Buffer extends _back_ from where we are now
3051 b->posn -= b->bufsiz;
3053 if (avail > (SSize_t) count) {
3055 * If we have space for more than count, just move count
3063 * In simple stdio-like ungetc() case chars will be already
3066 if (buf != b->ptr) {
3067 Copy(buf, b->ptr, avail, STDCHAR);
3071 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3078 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3080 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3081 const STDCHAR *buf = (const STDCHAR *) vbuf;
3085 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3088 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3089 if ((SSize_t) count < avail)
3091 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3092 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3107 Copy(buf, b->ptr, avail, STDCHAR);
3114 if (b->ptr >= (b->buf + b->bufsiz))
3117 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3123 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3126 if ((code = PerlIO_flush(f)) == 0) {
3127 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3128 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3129 code = PerlIO_seek(PerlIONext(f), offset, whence);
3131 b->posn = PerlIO_tell(PerlIONext(f));
3138 PerlIOBuf_tell(PerlIO *f)
3140 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3142 * b->posn is file position where b->buf was read, or will be written
3144 Off_t posn = b->posn;
3147 * If buffer is valid adjust position by amount in buffer
3149 posn += (b->ptr - b->buf);
3155 PerlIOBuf_close(PerlIO *f)
3157 IV code = PerlIOBase_close(f);
3158 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3159 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3163 b->ptr = b->end = b->buf;
3164 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3169 PerlIOBuf_get_ptr(PerlIO *f)
3171 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3178 PerlIOBuf_get_cnt(PerlIO *f)
3180 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3183 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3184 return (b->end - b->ptr);
3189 PerlIOBuf_get_base(PerlIO *f)
3191 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3196 Newz('B',b->buf,b->bufsiz, STDCHAR);
3198 b->buf = (STDCHAR *) & b->oneword;
3199 b->bufsiz = sizeof(b->oneword);
3208 PerlIOBuf_bufsiz(PerlIO *f)
3210 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3213 return (b->end - b->buf);
3217 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3219 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3223 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3225 assert(PerlIO_get_cnt(f) == cnt);
3226 assert(b->ptr >= b->buf);
3228 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3232 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3234 return PerlIOBase_dup(aTHX_ f, o, param);
3239 PerlIO_funcs PerlIO_perlio = {
3259 PerlIOBase_clearerr,
3260 PerlIOBase_setlinebuf,
3265 PerlIOBuf_set_ptrcnt,
3268 /*--------------------------------------------------------------------------------------*/
3270 * Temp layer to hold unread chars when cannot do it any other way
3274 PerlIOPending_fill(PerlIO *f)
3277 * Should never happen
3284 PerlIOPending_close(PerlIO *f)
3287 * A tad tricky - flush pops us, then we close new top
3290 return PerlIO_close(f);
3294 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3297 * A tad tricky - flush pops us, then we seek new top
3300 return PerlIO_seek(f, offset, whence);
3305 PerlIOPending_flush(PerlIO *f)
3308 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3309 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3313 PerlIO_pop(aTHX_ f);
3318 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3324 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3329 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3331 IV code = PerlIOBase_pushed(f, mode, arg);
3332 PerlIOl *l = PerlIOBase(f);
3334 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3335 * etc. get muddled when it changes mid-string when we auto-pop.
3337 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3338 (PerlIOBase(PerlIONext(f))->
3339 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3344 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3346 SSize_t avail = PerlIO_get_cnt(f);
3351 got = PerlIOBuf_read(f, vbuf, avail);
3352 if (got >= 0 && got < count) {
3354 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3355 if (more >= 0 || got == 0)
3361 PerlIO_funcs PerlIO_pending = {
3365 PerlIOPending_pushed,
3376 PerlIOPending_close,
3377 PerlIOPending_flush,
3381 PerlIOBase_clearerr,
3382 PerlIOBase_setlinebuf,
3387 PerlIOPending_set_ptrcnt,
3392 /*--------------------------------------------------------------------------------------*/
3394 * crlf - translation On read translate CR,LF to "\n" we do this by
3395 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3396 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3400 PerlIOBuf base; /* PerlIOBuf stuff */
3401 STDCHAR *nl; /* Position of crlf we "lied" about in the
3406 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3409 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3410 code = PerlIOBuf_pushed(f, mode, arg);
3412 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3413 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3414 PerlIOBase(f)->flags);
3421 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3423 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3428 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3429 return PerlIOBuf_unread(f, vbuf, count);
3431 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3432 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3434 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3439 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3440 b->end = b->ptr = b->buf + b->bufsiz;
3441 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3442 b->posn -= b->bufsiz;
3444 while (count > 0 && b->ptr > b->buf) {
3447 if (b->ptr - 2 >= b->buf) {
3470 PerlIOCrlf_get_cnt(PerlIO *f)
3472 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3475 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3476 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3477 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3478 STDCHAR *nl = b->ptr;
3480 while (nl < b->end && *nl != 0xd)
3482 if (nl < b->end && *nl == 0xd) {
3484 if (nl + 1 < b->end) {
3491 * Not CR,LF but just CR
3499 * Blast - found CR as last char in buffer
3503 * They may not care, defer work as long as
3506 return (nl - b->ptr);
3510 b->ptr++; /* say we have read it as far as
3511 * flush() is concerned */
3512 b->buf++; /* Leave space an front of buffer */
3513 b->bufsiz--; /* Buffer is thus smaller */
3514 code = PerlIO_fill(f); /* Fetch some more */
3515 b->bufsiz++; /* Restore size for next time */
3516 b->buf--; /* Point at space */
3517 b->ptr = nl = b->buf; /* Which is what we hand
3519 b->posn--; /* Buffer starts here */
3520 *nl = 0xd; /* Fill in the CR */
3522 goto test; /* fill() call worked */
3524 * CR at EOF - just fall through
3530 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3536 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3538 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3539 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3540 IV flags = PerlIOBase(f)->flags;
3548 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3555 * Test code - delete when it works ...
3562 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3569 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3570 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3577 * They have taken what we lied about
3585 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3589 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3591 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3592 return PerlIOBuf_write(f, vbuf, count);
3594 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3595 const STDCHAR *buf = (const STDCHAR *) vbuf;
3596 const STDCHAR *ebuf = buf + count;
3599 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3601 while (buf < ebuf) {
3602 STDCHAR *eptr = b->buf + b->bufsiz;
3603 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3604 while (buf < ebuf && b->ptr < eptr) {
3606 if ((b->ptr + 2) > eptr) {
3614 *(b->ptr)++ = 0xd; /* CR */
3615 *(b->ptr)++ = 0xa; /* LF */
3617 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3627 if (b->ptr >= eptr) {
3633 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3635 return (buf - (STDCHAR *) vbuf);
3640 PerlIOCrlf_flush(PerlIO *f)
3642 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3647 return PerlIOBuf_flush(f);
3650 PerlIO_funcs PerlIO_crlf = {
3653 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3655 PerlIOBase_noop_ok, /* popped */
3660 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3662 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3663 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3671 PerlIOBase_clearerr,
3672 PerlIOBase_setlinebuf,
3677 PerlIOCrlf_set_ptrcnt,
3681 /*--------------------------------------------------------------------------------------*/
3683 * mmap as "buffer" layer
3687 PerlIOBuf base; /* PerlIOBuf stuff */
3688 Mmap_t mptr; /* Mapped address */
3689 Size_t len; /* mapped length */
3690 STDCHAR *bbuf; /* malloced buffer if map fails */
3693 static size_t page_size = 0;
3696 PerlIOMmap_map(PerlIO *f)
3699 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3700 IV flags = PerlIOBase(f)->flags;
3704 if (flags & PERLIO_F_CANREAD) {
3705 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3706 int fd = PerlIO_fileno(f);
3708 code = Fstat(fd, &st);
3709 if (code == 0 && S_ISREG(st.st_mode)) {
3710 SSize_t len = st.st_size - b->posn;
3714 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3716 SETERRNO(0, SS$_NORMAL);
3717 # ifdef _SC_PAGESIZE
3718 page_size = sysconf(_SC_PAGESIZE);
3720 page_size = sysconf(_SC_PAGE_SIZE);
3722 if ((long) page_size < 0) {
3727 (void) SvUPGRADE(error, SVt_PV);
3728 msg = SvPVx(error, n_a);
3729 Perl_croak(aTHX_ "panic: sysconf: %s",
3734 "panic: sysconf: pagesize unknown");
3738 # ifdef HAS_GETPAGESIZE
3739 page_size = getpagesize();
3741 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3742 page_size = PAGESIZE; /* compiletime, bad */
3746 if ((IV) page_size <= 0)
3747 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3752 * This is a hack - should never happen - open should
3755 b->posn = PerlIO_tell(PerlIONext(f));
3757 posn = (b->posn / page_size) * page_size;
3758 len = st.st_size - posn;
3759 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3760 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3761 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3762 madvise(m->mptr, len, MADV_SEQUENTIAL);
3764 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3765 madvise(m->mptr, len, MADV_WILLNEED);
3767 PerlIOBase(f)->flags =
3768 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3769 b->end = ((STDCHAR *) m->mptr) + len;
3770 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3779 PerlIOBase(f)->flags =
3780 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3782 b->ptr = b->end = b->ptr;
3791 PerlIOMmap_unmap(PerlIO *f)
3793 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3794 PerlIOBuf *b = &m->base;
3798 code = munmap(m->mptr, m->len);
3802 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3805 b->ptr = b->end = b->buf;
3806 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3812 PerlIOMmap_get_base(PerlIO *f)
3814 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3815 PerlIOBuf *b = &m->base;
3816 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3818 * Already have a readbuffer in progress
3824 * We have a write buffer or flushed PerlIOBuf read buffer
3826 m->bbuf = b->buf; /* save it in case we need it again */
3827 b->buf = NULL; /* Clear to trigger below */
3830 PerlIOMmap_map(f); /* Try and map it */
3833 * Map did not work - recover PerlIOBuf buffer if we have one
3838 b->ptr = b->end = b->buf;
3841 return PerlIOBuf_get_base(f);
3845 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3847 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3848 PerlIOBuf *b = &m->base;
3849 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3851 if (b->ptr && (b->ptr - count) >= b->buf
3852 && memEQ(b->ptr - count, vbuf, count)) {
3854 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3859 * Loose the unwritable mapped buffer
3863 * If flush took the "buffer" see if we have one from before
3865 if (!b->buf && m->bbuf)
3868 PerlIOBuf_get_base(f);
3872 return PerlIOBuf_unread(f, vbuf, count);
3876 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3878 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3879 PerlIOBuf *b = &m->base;
3880 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3882 * No, or wrong sort of, buffer
3885 if (PerlIOMmap_unmap(f) != 0)
3889 * If unmap took the "buffer" see if we have one from before
3891 if (!b->buf && m->bbuf)
3894 PerlIOBuf_get_base(f);
3898 return PerlIOBuf_write(f, vbuf, count);
3902 PerlIOMmap_flush(PerlIO *f)
3904 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3905 PerlIOBuf *b = &m->base;
3906 IV code = PerlIOBuf_flush(f);
3908 * Now we are "synced" at PerlIOBuf level
3915 if (PerlIOMmap_unmap(f) != 0)
3920 * We seem to have a PerlIOBuf buffer which was not mapped
3921 * remember it in case we need one later
3930 PerlIOMmap_fill(PerlIO *f)
3932 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3933 IV code = PerlIO_flush(f);
3934 if (code == 0 && !b->buf) {
3935 code = PerlIOMmap_map(f);
3937 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3938 code = PerlIOBuf_fill(f);
3944 PerlIOMmap_close(PerlIO *f)
3946 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3947 PerlIOBuf *b = &m->base;
3948 IV code = PerlIO_flush(f);
3952 b->ptr = b->end = b->buf;
3954 if (PerlIOBuf_close(f) != 0)
3960 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3962 return PerlIOBase_dup(aTHX_ f, o, param);
3966 PerlIO_funcs PerlIO_mmap = {
3986 PerlIOBase_clearerr,
3987 PerlIOBase_setlinebuf,
3988 PerlIOMmap_get_base,
3992 PerlIOBuf_set_ptrcnt,
3995 #endif /* HAS_MMAP */
4003 PerlIO_stdstreams(aTHX);
4005 return &PL_perlio[1];
4008 #undef PerlIO_stdout
4014 PerlIO_stdstreams(aTHX);
4016 return &PL_perlio[2];
4019 #undef PerlIO_stderr
4025 PerlIO_stdstreams(aTHX);
4027 return &PL_perlio[3];
4030 /*--------------------------------------------------------------------------------------*/
4032 #undef PerlIO_getname
4034 PerlIO_getname(PerlIO *f, char *buf)
4039 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4041 name = fgetname(stdio, buf);
4043 Perl_croak(aTHX_ "Don't know how to get file name");
4049 /*--------------------------------------------------------------------------------------*/
4051 * Functions which can be called on any kind of PerlIO implemented in
4057 PerlIO_getc(PerlIO *f)
4060 SSize_t count = PerlIO_read(f, buf, 1);
4062 return (unsigned char) buf[0];
4067 #undef PerlIO_ungetc
4069 PerlIO_ungetc(PerlIO *f, int ch)
4073 if (PerlIO_unread(f, &buf, 1) == 1)
4081 PerlIO_putc(PerlIO *f, int ch)
4084 return PerlIO_write(f, &buf, 1);
4089 PerlIO_puts(PerlIO *f, const char *s)
4091 STRLEN len = strlen(s);
4092 return PerlIO_write(f, s, len);
4095 #undef PerlIO_rewind
4097 PerlIO_rewind(PerlIO *f)
4099 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4103 #undef PerlIO_vprintf
4105 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4108 SV *sv = newSVpvn("", 0);
4114 Perl_va_copy(ap, apc);
4115 sv_vcatpvf(sv, fmt, &apc);
4117 sv_vcatpvf(sv, fmt, &ap);
4120 wrote = PerlIO_write(f, s, len);
4125 #undef PerlIO_printf
4127 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4132 result = PerlIO_vprintf(f, fmt, ap);
4137 #undef PerlIO_stdoutf
4139 PerlIO_stdoutf(const char *fmt, ...)
4144 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4149 #undef PerlIO_tmpfile
4151 PerlIO_tmpfile(void)
4154 * I have no idea how portable mkstemp() is ...
4156 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4159 FILE *stdio = PerlSIO_tmpfile();
4162 PerlIOSelf(PerlIO_push
4163 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4164 "w+", Nullsv), PerlIOStdio);
4170 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4171 int fd = mkstemp(SvPVX(sv));
4174 f = PerlIO_fdopen(fd, "w+");
4176 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4178 PerlLIO_unlink(SvPVX(sv));
4188 #endif /* USE_SFIO */
4189 #endif /* PERLIO_IS_STDIO */
4191 /*======================================================================================*/
4193 * Now some functions in terms of above which may be needed even if we are
4194 * not in true PerlIO mode
4198 #undef PerlIO_setpos
4200 PerlIO_setpos(PerlIO *f, SV *pos)
4205 Off_t *posn = (Off_t *) SvPV(pos, len);
4206 if (f && len == sizeof(Off_t))
4207 return PerlIO_seek(f, *posn, SEEK_SET);
4209 SETERRNO(EINVAL, SS$_IVCHAN);
4213 #undef PerlIO_setpos
4215 PerlIO_setpos(PerlIO *f, SV *pos)
4220 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4221 if (f && len == sizeof(Fpos_t)) {
4222 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4223 return fsetpos64(f, fpos);
4225 return fsetpos(f, fpos);
4229 SETERRNO(EINVAL, SS$_IVCHAN);
4235 #undef PerlIO_getpos
4237 PerlIO_getpos(PerlIO *f, SV *pos)
4240 Off_t posn = PerlIO_tell(f);
4241 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4242 return (posn == (Off_t) - 1) ? -1 : 0;
4245 #undef PerlIO_getpos
4247 PerlIO_getpos(PerlIO *f, SV *pos)
4252 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4253 code = fgetpos64(f, &fpos);
4255 code = fgetpos(f, &fpos);
4257 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4262 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4265 vprintf(char *pat, char *args)
4267 _doprnt(pat, args, stdout);
4268 return 0; /* wrong, but perl doesn't use the return
4273 vfprintf(FILE *fd, char *pat, char *args)
4275 _doprnt(pat, args, fd);
4276 return 0; /* wrong, but perl doesn't use the return
4282 #ifndef PerlIO_vsprintf
4284 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4286 int val = vsprintf(s, fmt, ap);
4288 if (strlen(s) >= (STRLEN) n) {
4290 (void) PerlIO_puts(Perl_error_log,
4291 "panic: sprintf overflow - memory corrupted!\n");
4299 #ifndef PerlIO_sprintf
4301 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4306 result = PerlIO_vsprintf(s, n, fmt, ap);