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)
521 PerlIO_list_t *list = PerlIO_list_alloc(aTHX);
522 for (i=0; i < proto->cur; i++) {
524 if (proto->array[i].arg)
525 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
526 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
532 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
535 PerlIO **table = &proto->Iperlio;
538 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
539 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
540 PerlIO_allocate(aTHX); /* root slot is never used */
541 while ((f = *table)) {
543 table = (PerlIO **) (f++);
544 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
546 PerlIO_fdupopen(aTHX_ f, param);
557 PerlIO_cleantable(aTHX_ &PL_perlio);
561 PerlIO_destruct(pTHX)
563 PerlIO **table = &PL_perlio;
565 while ((f = *table)) {
567 table = (PerlIO **) (f++);
568 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
572 if (l->tab->kind & PERLIO_K_DESTRUCT) {
573 PerlIO_debug("Destruct popping %s\n", l->tab->name);
584 PerlIO_list_free(aTHX_ PL_known_layers);
585 PL_known_layers = NULL;
586 PerlIO_list_free(aTHX_ PL_def_layerlist);
587 PL_def_layerlist = NULL;
591 PerlIO_pop(pTHX_ PerlIO *f)
595 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
596 if (l->tab->Popped) {
598 * If popped returns non-zero do not free its layer structure
599 * it has either done so itself, or it is shared and still in
602 if ((*l->tab->Popped) (f) != 0)
610 /*--------------------------------------------------------------------------------------*/
612 * XS Interface for perl code
616 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
619 if ((SSize_t) len <= 0)
621 for (i = 0; i < PL_known_layers->cur; i++) {
622 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
623 if (memEQ(f->name, name, len)) {
624 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
628 if (load && PL_subname && PL_def_layerlist
629 && PL_def_layerlist->cur >= 2) {
630 SV *pkgsv = newSVpvn("PerlIO", 6);
631 SV *layer = newSVpvn(name, len);
634 * The two SVs are magically freed by load_module
636 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
638 return PerlIO_find_layer(aTHX_ name, len, 0);
640 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
644 #ifdef USE_ATTRIBUTES_FOR_PERLIO
647 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
650 IO *io = GvIOn((GV *) SvRV(sv));
651 PerlIO *ifp = IoIFP(io);
652 PerlIO *ofp = IoOFP(io);
653 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
659 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
662 IO *io = GvIOn((GV *) SvRV(sv));
663 PerlIO *ifp = IoIFP(io);
664 PerlIO *ofp = IoOFP(io);
665 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
671 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
673 Perl_warn(aTHX_ "clear %" SVf, sv);
678 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
680 Perl_warn(aTHX_ "free %" SVf, sv);
684 MGVTBL perlio_vtab = {
692 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
695 SV *sv = SvRV(ST(1));
700 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
702 mg = mg_find(sv, PERL_MAGIC_ext);
703 mg->mg_virtual = &perlio_vtab;
705 Perl_warn(aTHX_ "attrib %" SVf, sv);
706 for (i = 2; i < items; i++) {
708 const char *name = SvPV(ST(i), len);
709 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
711 av_push(av, SvREFCNT_inc(layer));
722 #endif /* USE_ATTIBUTES_FOR_PERLIO */
725 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
727 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
728 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
732 XS(XS_PerlIO__Layer__find)
736 Perl_croak(aTHX_ "Usage class->find(name[,load])");
739 char *name = SvPV(ST(1), len);
740 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
741 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
743 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
750 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
752 if (!PL_known_layers)
753 PL_known_layers = PerlIO_list_alloc(aTHX);
754 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
755 PerlIO_debug("define %s %p\n", tab->name, tab);
759 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
762 const char *s = names;
764 while (isSPACE(*s) || *s == ':')
769 const char *as = Nullch;
771 if (!isIDFIRST(*s)) {
773 * Message is consistent with how attribute lists are
774 * passed. Even though this means "foo : : bar" is
775 * seen as an invalid separator character.
777 char q = ((*s == '\'') ? '"' : '\'');
779 "perlio: invalid separator character %c%c%c in layer specification list",
785 } while (isALNUM(*e));
801 * It's a nul terminated string, not allowed
802 * to \ the terminating null. Anything other
803 * character is passed over.
814 "perlio: argument list not closed for layer \"%.*s\"",
826 PerlIO_funcs *layer =
827 PerlIO_find_layer(aTHX_ s, llen, 1);
829 PerlIO_list_push(aTHX_ av, layer,
835 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
848 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
850 PerlIO_funcs *tab = &PerlIO_perlio;
851 if (O_BINARY != O_TEXT) {
855 if (PerlIO_stdio.Set_ptrcnt) {
859 PerlIO_debug("Pushing %s\n", tab->name);
860 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
865 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
867 return av->array[n].arg;
871 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
873 if (n >= 0 && n < av->cur) {
874 PerlIO_debug("Layer %" IVdf " is %s\n", n,
875 av->array[n].funcs->name);
876 return av->array[n].funcs;
879 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
884 PerlIO_default_layers(pTHX)
886 if (!PL_def_layerlist) {
887 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
888 PerlIO_funcs *osLayer = &PerlIO_unix;
889 PL_def_layerlist = PerlIO_list_alloc(aTHX);
890 PerlIO_define_layer(aTHX_ & PerlIO_unix);
891 #if defined(WIN32) && !defined(UNDER_CE)
892 PerlIO_define_layer(aTHX_ & PerlIO_win32);
894 osLayer = &PerlIO_win32;
897 PerlIO_define_layer(aTHX_ & PerlIO_raw);
898 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
899 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
900 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
902 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
904 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
905 PerlIO_define_layer(aTHX_ & PerlIO_byte);
906 PerlIO_list_push(aTHX_ PL_def_layerlist,
907 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
910 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
913 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
916 if (PL_def_layerlist->cur < 2) {
917 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
919 return PL_def_layerlist;
923 Perl_boot_core_PerlIO(pTHX)
925 #ifdef USE_ATTRIBUTES_FOR_PERLIO
926 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
929 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
933 PerlIO_default_layer(pTHX_ I32 n)
935 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
938 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
941 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
942 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
945 PerlIO_stdstreams(pTHX)
948 PerlIO_allocate(aTHX);
949 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
950 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
951 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
956 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
959 Newc('L',l,tab->size,char,PerlIOl);
961 Zero(l, tab->size, char);
965 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
966 (mode) ? mode : "(Null)", arg);
967 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
976 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
989 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
992 * Remove the dummy layer
997 * Pop back to bottom layer
1001 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1002 if (*PerlIONext(f)) {
1003 PerlIO_pop(aTHX_ f);
1007 * Nothing bellow - push unix on top then remove it
1009 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1010 PerlIO_pop(aTHX_ PerlIONext(f));
1015 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1022 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1023 PerlIO_list_t *layers, IV n)
1025 IV max = layers->cur;
1028 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1030 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1041 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1045 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1046 code = PerlIO_parse_layers(aTHX_ layers, names);
1048 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1050 PerlIO_list_free(aTHX_ layers);
1056 /*--------------------------------------------------------------------------------------*/
1058 * Given the abstraction above the public API functions
1062 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1064 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1065 f, PerlIOBase(f)->tab->name, iotype, mode,
1066 (names) ? names : "(Null)");
1068 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1071 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1072 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1075 top = PerlIONext(top);
1079 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1082 #undef PerlIO__close
1084 PerlIO__close(PerlIO *f)
1087 return (*PerlIOBase(f)->tab->Close) (f);
1089 SETERRNO(EBADF, SS$_IVCHAN);
1096 PerlIO_close(PerlIO *f)
1101 code = (*PerlIOBase(f)->tab->Close) (f);
1103 PerlIO_pop(aTHX_ f);
1109 #undef PerlIO_fileno
1111 PerlIO_fileno(PerlIO *f)
1114 return (*PerlIOBase(f)->tab->Fileno) (f);
1116 SETERRNO(EBADF, SS$_IVCHAN);
1122 PerlIO_context_layers(pTHX_ const char *mode)
1124 const char *type = NULL;
1126 * Need to supply default layer info from open.pm
1129 SV *layers = PL_curcop->cop_io;
1132 type = SvPV(layers, len);
1133 if (type && mode[0] != 'r') {
1135 * Skip to write part
1137 const char *s = strchr(type, 0);
1138 if (s && (s - type) < len) {
1147 static PerlIO_funcs *
1148 PerlIO_layer_from_ref(pTHX_ SV *sv)
1151 * For any scalar type load the handler which is bundled with perl
1153 if (SvTYPE(sv) < SVt_PVAV)
1154 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1157 * For other types allow if layer is known but don't try and load it
1159 switch (SvTYPE(sv)) {
1161 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1163 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1165 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1167 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1173 PerlIO_resolve_layers(pTHX_ const char *layers,
1174 const char *mode, int narg, SV **args)
1176 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1179 PerlIO_stdstreams(aTHX);
1183 * If it is a reference but not an object see if we have a handler
1186 if (SvROK(arg) && !sv_isobject(arg)) {
1187 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1189 def = PerlIO_list_alloc(aTHX);
1190 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1194 * Don't fail if handler cannot be found :Via(...) etc. may do
1195 * something sensible else we will just stringfy and open
1201 layers = PerlIO_context_layers(aTHX_ mode);
1202 if (layers && *layers) {
1206 av = PerlIO_list_alloc(aTHX);
1207 for (i = 0; i < def->cur; i++) {
1208 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1215 PerlIO_parse_layers(aTHX_ av, layers);
1226 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1227 int imode, int perm, PerlIO *f, int narg, SV **args)
1229 if (!f && narg == 1 && *args == &PL_sv_undef) {
1230 if ((f = PerlIO_tmpfile())) {
1232 layers = PerlIO_context_layers(aTHX_ mode);
1233 if (layers && *layers)
1234 PerlIO_apply_layers(aTHX_ f, mode, layers);
1238 PerlIO_list_t *layera = NULL;
1240 PerlIO_funcs *tab = NULL;
1243 * This is "reopen" - it is not tested as perl does not use it
1247 layera = PerlIO_list_alloc(aTHX);
1250 (l->tab->Getarg) ? (*l->tab->
1251 Getarg) (&l) : &PL_sv_undef;
1252 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1253 l = *PerlIONext(&l);
1257 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1260 * Start at "top" of layer stack
1262 n = layera->cur - 1;
1264 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1273 * Found that layer 'n' can do opens - call it
1275 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1276 tab->name, layers, mode, fd, imode, perm, f, narg,
1278 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1281 if (n + 1 < layera->cur) {
1283 * More layers above the one that we used to open -
1286 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1293 PerlIO_list_free(aTHX_ layera);
1299 #undef PerlIO_fdopen
1301 PerlIO_fdopen(int fd, const char *mode)
1304 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1309 PerlIO_open(const char *path, const char *mode)
1312 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1313 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1316 #undef PerlIO_reopen
1318 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1321 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1322 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1327 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1330 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1332 SETERRNO(EBADF, SS$_IVCHAN);
1337 #undef PerlIO_unread
1339 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1342 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1344 SETERRNO(EBADF, SS$_IVCHAN);
1351 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1354 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1356 SETERRNO(EBADF, SS$_IVCHAN);
1363 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1366 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1368 SETERRNO(EBADF, SS$_IVCHAN);
1375 PerlIO_tell(PerlIO *f)
1378 return (*PerlIOBase(f)->tab->Tell) (f);
1380 SETERRNO(EBADF, SS$_IVCHAN);
1387 PerlIO_flush(PerlIO *f)
1391 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1392 if (tab && tab->Flush) {
1393 return (*tab->Flush) (f);
1396 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1397 SETERRNO(EBADF, SS$_IVCHAN);
1402 PerlIO_debug("Cannot flush f=%p\n", f);
1403 SETERRNO(EBADF, SS$_IVCHAN);
1409 * Is it good API design to do flush-all on NULL, a potentially
1410 * errorneous input? Maybe some magical value (PerlIO*
1411 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1412 * things on fflush(NULL), but should we be bound by their design
1416 PerlIO **table = &PL_perlio;
1418 while ((f = *table)) {
1420 table = (PerlIO **) (f++);
1421 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1422 if (*f && PerlIO_flush(f) != 0)
1432 PerlIOBase_flush_linebuf()
1435 PerlIO **table = &PL_perlio;
1437 while ((f = *table)) {
1439 table = (PerlIO **) (f++);
1440 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1443 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1444 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1453 PerlIO_fill(PerlIO *f)
1456 return (*PerlIOBase(f)->tab->Fill) (f);
1458 SETERRNO(EBADF, SS$_IVCHAN);
1463 #undef PerlIO_isutf8
1465 PerlIO_isutf8(PerlIO *f)
1468 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1470 SETERRNO(EBADF, SS$_IVCHAN);
1477 PerlIO_eof(PerlIO *f)
1480 return (*PerlIOBase(f)->tab->Eof) (f);
1482 SETERRNO(EBADF, SS$_IVCHAN);
1489 PerlIO_error(PerlIO *f)
1492 return (*PerlIOBase(f)->tab->Error) (f);
1494 SETERRNO(EBADF, SS$_IVCHAN);
1499 #undef PerlIO_clearerr
1501 PerlIO_clearerr(PerlIO *f)
1504 (*PerlIOBase(f)->tab->Clearerr) (f);
1506 SETERRNO(EBADF, SS$_IVCHAN);
1509 #undef PerlIO_setlinebuf
1511 PerlIO_setlinebuf(PerlIO *f)
1514 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1516 SETERRNO(EBADF, SS$_IVCHAN);
1519 #undef PerlIO_has_base
1521 PerlIO_has_base(PerlIO *f)
1524 return (PerlIOBase(f)->tab->Get_base != NULL);
1529 #undef PerlIO_fast_gets
1531 PerlIO_fast_gets(PerlIO *f)
1533 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1534 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1535 return (tab->Set_ptrcnt != NULL);
1540 #undef PerlIO_has_cntptr
1542 PerlIO_has_cntptr(PerlIO *f)
1545 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1546 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1551 #undef PerlIO_canset_cnt
1553 PerlIO_canset_cnt(PerlIO *f)
1556 PerlIOl *l = PerlIOBase(f);
1557 return (l->tab->Set_ptrcnt != NULL);
1562 #undef PerlIO_get_base
1564 PerlIO_get_base(PerlIO *f)
1567 return (*PerlIOBase(f)->tab->Get_base) (f);
1571 #undef PerlIO_get_bufsiz
1573 PerlIO_get_bufsiz(PerlIO *f)
1576 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1580 #undef PerlIO_get_ptr
1582 PerlIO_get_ptr(PerlIO *f)
1584 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1585 if (tab->Get_ptr == NULL)
1587 return (*tab->Get_ptr) (f);
1590 #undef PerlIO_get_cnt
1592 PerlIO_get_cnt(PerlIO *f)
1594 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1595 if (tab->Get_cnt == NULL)
1597 return (*tab->Get_cnt) (f);
1600 #undef PerlIO_set_cnt
1602 PerlIO_set_cnt(PerlIO *f, int cnt)
1604 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1607 #undef PerlIO_set_ptrcnt
1609 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1611 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1612 if (tab->Set_ptrcnt == NULL) {
1614 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1616 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1619 /*--------------------------------------------------------------------------------------*/
1621 * utf8 and raw dummy layers
1625 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1627 if (PerlIONext(f)) {
1629 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1630 PerlIO_pop(aTHX_ f);
1631 if (tab->kind & PERLIO_K_UTF8)
1632 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1634 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1640 PerlIO_funcs PerlIO_utf8 = {
1643 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1661 NULL, /* get_base */
1662 NULL, /* get_bufsiz */
1665 NULL, /* set_ptrcnt */
1668 PerlIO_funcs PerlIO_byte = {
1689 NULL, /* get_base */
1690 NULL, /* get_bufsiz */
1693 NULL, /* set_ptrcnt */
1697 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1698 IV n, const char *mode, int fd, int imode, int perm,
1699 PerlIO *old, int narg, SV **args)
1701 PerlIO_funcs *tab = PerlIO_default_btm();
1702 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1706 PerlIO_funcs PerlIO_raw = {
1727 NULL, /* get_base */
1728 NULL, /* get_bufsiz */
1731 NULL, /* set_ptrcnt */
1733 /*--------------------------------------------------------------------------------------*/
1734 /*--------------------------------------------------------------------------------------*/
1736 * "Methods" of the "base class"
1740 PerlIOBase_fileno(PerlIO *f)
1742 return PerlIO_fileno(PerlIONext(f));
1746 PerlIO_modestr(PerlIO *f, char *buf)
1749 IV flags = PerlIOBase(f)->flags;
1750 if (flags & PERLIO_F_APPEND) {
1752 if (flags & PERLIO_F_CANREAD) {
1756 else if (flags & PERLIO_F_CANREAD) {
1758 if (flags & PERLIO_F_CANWRITE)
1761 else if (flags & PERLIO_F_CANWRITE) {
1763 if (flags & PERLIO_F_CANREAD) {
1767 #if O_TEXT != O_BINARY
1768 if (!(flags & PERLIO_F_CRLF))
1776 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1778 PerlIOl *l = PerlIOBase(f);
1780 const char *omode = mode;
1783 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1784 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1785 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1786 if (tab->Set_ptrcnt != NULL)
1787 l->flags |= PERLIO_F_FASTGETS;
1789 if (*mode == '#' || *mode == 'I')
1793 l->flags |= PERLIO_F_CANREAD;
1796 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1799 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1802 SETERRNO(EINVAL, LIB$_INVARG);
1808 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1811 l->flags &= ~PERLIO_F_CRLF;
1814 l->flags |= PERLIO_F_CRLF;
1817 SETERRNO(EINVAL, LIB$_INVARG);
1824 l->flags |= l->next->flags &
1825 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1830 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1831 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1832 l->flags, PerlIO_modestr(f, temp));
1838 PerlIOBase_popped(PerlIO *f)
1844 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1848 * Save the position as current head considers it
1850 Off_t old = PerlIO_tell(f);
1852 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1853 PerlIOSelf(f, PerlIOBuf)->posn = old;
1854 done = PerlIOBuf_unread(f, vbuf, count);
1859 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1861 STDCHAR *buf = (STDCHAR *) vbuf;
1863 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1866 SSize_t avail = PerlIO_get_cnt(f);
1869 take = (count < avail) ? count : avail;
1871 STDCHAR *ptr = PerlIO_get_ptr(f);
1872 Copy(ptr, buf, take, STDCHAR);
1873 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1877 if (count > 0 && avail <= 0) {
1878 if (PerlIO_fill(f) != 0)
1882 return (buf - (STDCHAR *) vbuf);
1888 PerlIOBase_noop_ok(PerlIO *f)
1894 PerlIOBase_noop_fail(PerlIO *f)
1900 PerlIOBase_close(PerlIO *f)
1903 PerlIO *n = PerlIONext(f);
1904 if (PerlIO_flush(f) != 0)
1906 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1908 PerlIOBase(f)->flags &=
1909 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1914 PerlIOBase_eof(PerlIO *f)
1917 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1923 PerlIOBase_error(PerlIO *f)
1926 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1932 PerlIOBase_clearerr(PerlIO *f)
1935 PerlIO *n = PerlIONext(f);
1936 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1943 PerlIOBase_setlinebuf(PerlIO *f)
1946 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1950 /*--------------------------------------------------------------------------------------*/
1952 * Bottom-most level for UNIX-like case
1956 struct _PerlIO base; /* The generic part */
1957 int fd; /* UNIX like file descriptor */
1958 int oflags; /* open/fcntl flags */
1962 PerlIOUnix_oflags(const char *mode)
1965 if (*mode == 'I' || *mode == '#')
1970 if (*++mode == '+') {
1977 oflags = O_CREAT | O_TRUNC;
1978 if (*++mode == '+') {
1987 oflags = O_CREAT | O_APPEND;
1988 if (*++mode == '+') {
2001 else if (*mode == 't') {
2003 oflags &= ~O_BINARY;
2007 * Always open in binary mode
2010 if (*mode || oflags == -1) {
2011 SETERRNO(EINVAL, LIB$_INVARG);
2018 PerlIOUnix_fileno(PerlIO *f)
2020 return PerlIOSelf(f, PerlIOUnix)->fd;
2024 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2026 IV code = PerlIOBase_pushed(f, mode, arg);
2027 if (*PerlIONext(f)) {
2028 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2029 s->fd = PerlIO_fileno(PerlIONext(f));
2031 * XXX could (or should) we retrieve the oflags from the open file
2032 * handle rather than believing the "mode" we are passed in? XXX
2033 * Should the value on NULL mode be 0 or -1?
2035 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2037 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2042 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2043 IV n, const char *mode, int fd, int imode,
2044 int perm, PerlIO *f, int narg, SV **args)
2047 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2048 (*PerlIOBase(f)->tab->Close) (f);
2051 char *path = SvPV_nolen(*args);
2055 imode = PerlIOUnix_oflags(mode);
2059 fd = PerlLIO_open3(path, imode, perm);
2067 f = PerlIO_allocate(aTHX);
2068 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2072 s = PerlIOSelf(f, PerlIOUnix);
2075 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2081 * FIXME: pop layers ???
2089 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2095 return sv_dup(arg, param);
2098 return newSVsv(arg);
2101 return newSVsv(arg);
2106 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2108 PerlIO *nexto = PerlIONext(o);
2110 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2111 f = (*tab->Dup)(aTHX_ f, nexto, param);
2114 PerlIO_funcs *self = PerlIOBase(o)->tab;
2117 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
2119 arg = (*self->Getarg)(o);
2121 arg = PerlIO_sv_dup(aTHX_ arg, param);
2124 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2133 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2135 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2136 int fd = PerlLIO_dup(os->fd);
2138 f = PerlIOBase_dup(aTHX_ f, o, param);
2140 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2141 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2154 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2157 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2158 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2161 SSize_t len = PerlLIO_read(fd, vbuf, count);
2162 if (len >= 0 || errno != EINTR) {
2164 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2165 else if (len == 0 && count != 0)
2166 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2174 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2177 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2179 SSize_t len = PerlLIO_write(fd, vbuf, count);
2180 if (len >= 0 || errno != EINTR) {
2182 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2190 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2194 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2195 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2196 return (new == (Off_t) - 1) ? -1 : 0;
2200 PerlIOUnix_tell(PerlIO *f)
2203 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2208 PerlIOUnix_close(PerlIO *f)
2211 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2213 while (PerlLIO_close(fd) != 0) {
2214 if (errno != EINTR) {
2221 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2226 PerlIO_funcs PerlIO_unix = {
2242 PerlIOBase_noop_ok, /* flush */
2243 PerlIOBase_noop_fail, /* fill */
2246 PerlIOBase_clearerr,
2247 PerlIOBase_setlinebuf,
2248 NULL, /* get_base */
2249 NULL, /* get_bufsiz */
2252 NULL, /* set_ptrcnt */
2255 /*--------------------------------------------------------------------------------------*/
2261 struct _PerlIO base;
2262 FILE *stdio; /* The stream */
2266 PerlIOStdio_fileno(PerlIO *f)
2269 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2273 PerlIOStdio_mode(const char *mode, char *tmode)
2279 if (O_BINARY != O_TEXT) {
2287 * This isn't used yet ...
2290 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2292 if (*PerlIONext(f)) {
2294 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2297 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2298 PerlIOStdio_mode(mode, tmode));
2304 return PerlIOBase_pushed(f, mode, arg);
2307 #undef PerlIO_importFILE
2309 PerlIO_importFILE(FILE *stdio, int fl)
2315 PerlIOSelf(PerlIO_push
2316 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2317 "r+", Nullsv), PerlIOStdio);
2324 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2325 IV n, const char *mode, int fd, int imode,
2326 int perm, PerlIO *f, int narg, SV **args)
2330 char *path = SvPV_nolen(*args);
2331 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2333 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2342 char *path = SvPV_nolen(*args);
2345 fd = PerlLIO_open3(path, imode, perm);
2348 FILE *stdio = PerlSIO_fopen(path, mode);
2351 PerlIOSelf(PerlIO_push
2352 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2353 (mode = PerlIOStdio_mode(mode, tmode)),
2371 stdio = PerlSIO_stdin;
2374 stdio = PerlSIO_stdout;
2377 stdio = PerlSIO_stderr;
2382 stdio = PerlSIO_fdopen(fd, mode =
2383 PerlIOStdio_mode(mode, tmode));
2387 PerlIOSelf(PerlIO_push
2388 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2389 mode, PerlIOArg), PerlIOStdio);
2399 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2402 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2405 STDCHAR *buf = (STDCHAR *) vbuf;
2407 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2408 * stdio does not do that for fread()
2410 int ch = PerlSIO_fgetc(s);
2417 got = PerlSIO_fread(vbuf, 1, count, s);
2422 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2425 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2426 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2429 int ch = *buf-- & 0xff;
2430 if (PerlSIO_ungetc(ch, s) != ch)
2439 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2442 return PerlSIO_fwrite(vbuf, 1, count,
2443 PerlIOSelf(f, PerlIOStdio)->stdio);
2447 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2450 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2451 return PerlSIO_fseek(stdio, offset, whence);
2455 PerlIOStdio_tell(PerlIO *f)
2458 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2459 return PerlSIO_ftell(stdio);
2463 PerlIOStdio_close(PerlIO *f)
2466 #ifdef SOCKS5_VERSION_NAME
2468 Sock_size_t optlen = sizeof(int);
2470 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2472 #ifdef SOCKS5_VERSION_NAME
2474 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2476 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2478 PerlSIO_fclose(stdio)
2485 PerlIOStdio_flush(PerlIO *f)
2488 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2489 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2490 return PerlSIO_fflush(stdio);
2495 * FIXME: This discards ungetc() and pre-read stuff which is not
2496 * right if this is just a "sync" from a layer above Suspect right
2497 * design is to do _this_ but not have layer above flush this
2498 * layer read-to-read
2501 * Not writeable - sync by attempting a seek
2504 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2512 PerlIOStdio_fill(PerlIO *f)
2515 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2518 * fflush()ing read-only streams can cause trouble on some stdio-s
2520 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2521 if (PerlSIO_fflush(stdio) != 0)
2524 c = PerlSIO_fgetc(stdio);
2525 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2531 PerlIOStdio_eof(PerlIO *f)
2534 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2538 PerlIOStdio_error(PerlIO *f)
2541 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2545 PerlIOStdio_clearerr(PerlIO *f)
2548 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2552 PerlIOStdio_setlinebuf(PerlIO *f)
2555 #ifdef HAS_SETLINEBUF
2556 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2558 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2564 PerlIOStdio_get_base(PerlIO *f)
2567 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2568 return PerlSIO_get_base(stdio);
2572 PerlIOStdio_get_bufsiz(PerlIO *f)
2575 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2576 return PerlSIO_get_bufsiz(stdio);
2580 #ifdef USE_STDIO_PTR
2582 PerlIOStdio_get_ptr(PerlIO *f)
2585 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2586 return PerlSIO_get_ptr(stdio);
2590 PerlIOStdio_get_cnt(PerlIO *f)
2593 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2594 return PerlSIO_get_cnt(stdio);
2598 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2600 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2603 #ifdef STDIO_PTR_LVALUE
2604 PerlSIO_set_ptr(stdio, ptr);
2605 #ifdef STDIO_PTR_LVAL_SETS_CNT
2606 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2608 assert(PerlSIO_get_cnt(stdio) == (cnt));
2611 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2613 * Setting ptr _does_ change cnt - we are done
2617 #else /* STDIO_PTR_LVALUE */
2619 #endif /* STDIO_PTR_LVALUE */
2622 * Now (or only) set cnt
2624 #ifdef STDIO_CNT_LVALUE
2625 PerlSIO_set_cnt(stdio, cnt);
2626 #else /* STDIO_CNT_LVALUE */
2627 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2628 PerlSIO_set_ptr(stdio,
2629 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2631 #else /* STDIO_PTR_LVAL_SETS_CNT */
2633 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2634 #endif /* STDIO_CNT_LVALUE */
2640 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2642 /* This assumes no layers underneath - which is what
2643 happens, but is not how I remember it. NI-S 2001/10/16
2645 int fd = PerlLIO_dup(PerlIO_fileno(o));
2648 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2650 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2651 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2654 PerlSIO_fclose(stdio);
2665 PerlIO_funcs PerlIO_stdio = {
2667 sizeof(PerlIOStdio),
2685 PerlIOStdio_clearerr,
2686 PerlIOStdio_setlinebuf,
2688 PerlIOStdio_get_base,
2689 PerlIOStdio_get_bufsiz,
2694 #ifdef USE_STDIO_PTR
2695 PerlIOStdio_get_ptr,
2696 PerlIOStdio_get_cnt,
2697 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2698 PerlIOStdio_set_ptrcnt
2699 #else /* STDIO_PTR_LVALUE */
2701 #endif /* STDIO_PTR_LVALUE */
2702 #else /* USE_STDIO_PTR */
2706 #endif /* USE_STDIO_PTR */
2709 #undef PerlIO_exportFILE
2711 PerlIO_exportFILE(PerlIO *f, int fl)
2715 stdio = fdopen(PerlIO_fileno(f), "r+");
2719 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2726 #undef PerlIO_findFILE
2728 PerlIO_findFILE(PerlIO *f)
2732 if (l->tab == &PerlIO_stdio) {
2733 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2736 l = *PerlIONext(&l);
2738 return PerlIO_exportFILE(f, 0);
2741 #undef PerlIO_releaseFILE
2743 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2747 /*--------------------------------------------------------------------------------------*/
2749 * perlio buffer layer
2753 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2756 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2757 int fd = PerlIO_fileno(f);
2759 if (fd >= 0 && PerlLIO_isatty(fd)) {
2760 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2762 posn = PerlIO_tell(PerlIONext(f));
2763 if (posn != (Off_t) - 1) {
2766 return PerlIOBase_pushed(f, mode, arg);
2770 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2771 IV n, const char *mode, int fd, int imode, int perm,
2772 PerlIO *f, int narg, SV **args)
2775 PerlIO *next = PerlIONext(f);
2777 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2779 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2782 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2788 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2796 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2799 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2800 fd = PerlIO_fileno(f);
2801 #if O_BINARY != O_TEXT
2803 * do something about failing setmode()? --jhi
2805 PerlLIO_setmode(fd, O_BINARY);
2807 if (init && fd == 2) {
2809 * Initial stderr is unbuffered
2811 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2819 * This "flush" is akin to sfio's sync in that it handles files in either
2820 * read or write state
2823 PerlIOBuf_flush(PerlIO *f)
2825 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2827 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2829 * write() the buffer
2831 STDCHAR *buf = b->buf;
2833 PerlIO *n = PerlIONext(f);
2834 while (p < b->ptr) {
2835 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2839 else if (count < 0 || PerlIO_error(n)) {
2840 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2845 b->posn += (p - buf);
2847 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2848 STDCHAR *buf = PerlIO_get_base(f);
2850 * Note position change
2852 b->posn += (b->ptr - buf);
2853 if (b->ptr < b->end) {
2855 * We did not consume all of it
2857 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2858 b->posn = PerlIO_tell(PerlIONext(f));
2862 b->ptr = b->end = b->buf;
2863 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2865 * FIXME: Is this right for read case ?
2867 if (PerlIO_flush(PerlIONext(f)) != 0)
2873 PerlIOBuf_fill(PerlIO *f)
2875 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2876 PerlIO *n = PerlIONext(f);
2879 * FIXME: doing the down-stream flush is a bad idea if it causes
2880 * pre-read data in stdio buffer to be discarded but this is too
2881 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2882 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2884 if (PerlIO_flush(f) != 0)
2886 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2887 PerlIOBase_flush_linebuf();
2890 PerlIO_get_base(f); /* allocate via vtable */
2892 b->ptr = b->end = b->buf;
2893 if (PerlIO_fast_gets(n)) {
2895 * Layer below is also buffered We do _NOT_ want to call its
2896 * ->Read() because that will loop till it gets what we asked for
2897 * which may hang on a pipe etc. Instead take anything it has to
2898 * hand, or ask it to fill _once_.
2900 avail = PerlIO_get_cnt(n);
2902 avail = PerlIO_fill(n);
2904 avail = PerlIO_get_cnt(n);
2906 if (!PerlIO_error(n) && PerlIO_eof(n))
2911 STDCHAR *ptr = PerlIO_get_ptr(n);
2912 SSize_t cnt = avail;
2913 if (avail > b->bufsiz)
2915 Copy(ptr, b->buf, avail, STDCHAR);
2916 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2920 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2924 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2926 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2929 b->end = b->buf + avail;
2930 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2935 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2937 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2941 return PerlIOBase_read(f, vbuf, count);
2947 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2949 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2950 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2953 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2958 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2960 * Buffer is already a read buffer, we can overwrite any chars
2961 * which have been read back to buffer start
2963 avail = (b->ptr - b->buf);
2967 * Buffer is idle, set it up so whole buffer is available for
2971 b->end = b->buf + avail;
2973 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2975 * Buffer extends _back_ from where we are now
2977 b->posn -= b->bufsiz;
2979 if (avail > (SSize_t) count) {
2981 * If we have space for more than count, just move count
2989 * In simple stdio-like ungetc() case chars will be already
2992 if (buf != b->ptr) {
2993 Copy(buf, b->ptr, avail, STDCHAR);
2997 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3004 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3006 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3007 const STDCHAR *buf = (const STDCHAR *) vbuf;
3011 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3014 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3015 if ((SSize_t) count < avail)
3017 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3018 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3033 Copy(buf, b->ptr, avail, STDCHAR);
3040 if (b->ptr >= (b->buf + b->bufsiz))
3043 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3049 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3052 if ((code = PerlIO_flush(f)) == 0) {
3053 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3054 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3055 code = PerlIO_seek(PerlIONext(f), offset, whence);
3057 b->posn = PerlIO_tell(PerlIONext(f));
3064 PerlIOBuf_tell(PerlIO *f)
3066 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3068 * b->posn is file position where b->buf was read, or will be written
3070 Off_t posn = b->posn;
3073 * If buffer is valid adjust position by amount in buffer
3075 posn += (b->ptr - b->buf);
3081 PerlIOBuf_close(PerlIO *f)
3083 IV code = PerlIOBase_close(f);
3084 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3085 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3089 b->ptr = b->end = b->buf;
3090 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3095 PerlIOBuf_get_ptr(PerlIO *f)
3097 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3104 PerlIOBuf_get_cnt(PerlIO *f)
3106 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3109 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3110 return (b->end - b->ptr);
3115 PerlIOBuf_get_base(PerlIO *f)
3117 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3122 Newz('B',b->buf,b->bufsiz, STDCHAR);
3124 b->buf = (STDCHAR *) & b->oneword;
3125 b->bufsiz = sizeof(b->oneword);
3134 PerlIOBuf_bufsiz(PerlIO *f)
3136 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3139 return (b->end - b->buf);
3143 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3145 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3149 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3151 assert(PerlIO_get_cnt(f) == cnt);
3152 assert(b->ptr >= b->buf);
3154 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3158 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3160 return PerlIOBase_dup(aTHX_ f, o, param);
3165 PerlIO_funcs PerlIO_perlio = {
3185 PerlIOBase_clearerr,
3186 PerlIOBase_setlinebuf,
3191 PerlIOBuf_set_ptrcnt,
3194 /*--------------------------------------------------------------------------------------*/
3196 * Temp layer to hold unread chars when cannot do it any other way
3200 PerlIOPending_fill(PerlIO *f)
3203 * Should never happen
3210 PerlIOPending_close(PerlIO *f)
3213 * A tad tricky - flush pops us, then we close new top
3216 return PerlIO_close(f);
3220 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3223 * A tad tricky - flush pops us, then we seek new top
3226 return PerlIO_seek(f, offset, whence);
3231 PerlIOPending_flush(PerlIO *f)
3234 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3235 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3239 PerlIO_pop(aTHX_ f);
3244 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3250 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3255 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3257 IV code = PerlIOBase_pushed(f, mode, arg);
3258 PerlIOl *l = PerlIOBase(f);
3260 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3261 * etc. get muddled when it changes mid-string when we auto-pop.
3263 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3264 (PerlIOBase(PerlIONext(f))->
3265 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3270 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3272 SSize_t avail = PerlIO_get_cnt(f);
3277 got = PerlIOBuf_read(f, vbuf, avail);
3278 if (got >= 0 && got < count) {
3280 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3281 if (more >= 0 || got == 0)
3287 PerlIO_funcs PerlIO_pending = {
3291 PerlIOPending_pushed,
3302 PerlIOPending_close,
3303 PerlIOPending_flush,
3307 PerlIOBase_clearerr,
3308 PerlIOBase_setlinebuf,
3313 PerlIOPending_set_ptrcnt,
3318 /*--------------------------------------------------------------------------------------*/
3320 * crlf - translation On read translate CR,LF to "\n" we do this by
3321 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3322 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3326 PerlIOBuf base; /* PerlIOBuf stuff */
3327 STDCHAR *nl; /* Position of crlf we "lied" about in the
3332 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3335 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3336 code = PerlIOBuf_pushed(f, mode, arg);
3338 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3339 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3340 PerlIOBase(f)->flags);
3347 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3349 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3354 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3355 return PerlIOBuf_unread(f, vbuf, count);
3357 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3358 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3360 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3365 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3366 b->end = b->ptr = b->buf + b->bufsiz;
3367 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3368 b->posn -= b->bufsiz;
3370 while (count > 0 && b->ptr > b->buf) {
3373 if (b->ptr - 2 >= b->buf) {
3396 PerlIOCrlf_get_cnt(PerlIO *f)
3398 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3401 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3402 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3403 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3404 STDCHAR *nl = b->ptr;
3406 while (nl < b->end && *nl != 0xd)
3408 if (nl < b->end && *nl == 0xd) {
3410 if (nl + 1 < b->end) {
3417 * Not CR,LF but just CR
3425 * Blast - found CR as last char in buffer
3429 * They may not care, defer work as long as
3432 return (nl - b->ptr);
3436 b->ptr++; /* say we have read it as far as
3437 * flush() is concerned */
3438 b->buf++; /* Leave space an front of buffer */
3439 b->bufsiz--; /* Buffer is thus smaller */
3440 code = PerlIO_fill(f); /* Fetch some more */
3441 b->bufsiz++; /* Restore size for next time */
3442 b->buf--; /* Point at space */
3443 b->ptr = nl = b->buf; /* Which is what we hand
3445 b->posn--; /* Buffer starts here */
3446 *nl = 0xd; /* Fill in the CR */
3448 goto test; /* fill() call worked */
3450 * CR at EOF - just fall through
3456 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3462 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3464 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3465 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3466 IV flags = PerlIOBase(f)->flags;
3474 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3481 * Test code - delete when it works ...
3488 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3495 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3496 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3503 * They have taken what we lied about
3511 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3515 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3517 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3518 return PerlIOBuf_write(f, vbuf, count);
3520 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3521 const STDCHAR *buf = (const STDCHAR *) vbuf;
3522 const STDCHAR *ebuf = buf + count;
3525 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3527 while (buf < ebuf) {
3528 STDCHAR *eptr = b->buf + b->bufsiz;
3529 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3530 while (buf < ebuf && b->ptr < eptr) {
3532 if ((b->ptr + 2) > eptr) {
3540 *(b->ptr)++ = 0xd; /* CR */
3541 *(b->ptr)++ = 0xa; /* LF */
3543 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3553 if (b->ptr >= eptr) {
3559 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3561 return (buf - (STDCHAR *) vbuf);
3566 PerlIOCrlf_flush(PerlIO *f)
3568 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3573 return PerlIOBuf_flush(f);
3576 PerlIO_funcs PerlIO_crlf = {
3579 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3581 PerlIOBase_noop_ok, /* popped */
3586 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3588 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3589 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3597 PerlIOBase_clearerr,
3598 PerlIOBase_setlinebuf,
3603 PerlIOCrlf_set_ptrcnt,
3607 /*--------------------------------------------------------------------------------------*/
3609 * mmap as "buffer" layer
3613 PerlIOBuf base; /* PerlIOBuf stuff */
3614 Mmap_t mptr; /* Mapped address */
3615 Size_t len; /* mapped length */
3616 STDCHAR *bbuf; /* malloced buffer if map fails */
3619 static size_t page_size = 0;
3622 PerlIOMmap_map(PerlIO *f)
3625 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3626 IV flags = PerlIOBase(f)->flags;
3630 if (flags & PERLIO_F_CANREAD) {
3631 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3632 int fd = PerlIO_fileno(f);
3634 code = Fstat(fd, &st);
3635 if (code == 0 && S_ISREG(st.st_mode)) {
3636 SSize_t len = st.st_size - b->posn;
3640 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3642 SETERRNO(0, SS$_NORMAL);
3643 # ifdef _SC_PAGESIZE
3644 page_size = sysconf(_SC_PAGESIZE);
3646 page_size = sysconf(_SC_PAGE_SIZE);
3648 if ((long) page_size < 0) {
3653 (void) SvUPGRADE(error, SVt_PV);
3654 msg = SvPVx(error, n_a);
3655 Perl_croak(aTHX_ "panic: sysconf: %s",
3660 "panic: sysconf: pagesize unknown");
3664 # ifdef HAS_GETPAGESIZE
3665 page_size = getpagesize();
3667 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3668 page_size = PAGESIZE; /* compiletime, bad */
3672 if ((IV) page_size <= 0)
3673 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3678 * This is a hack - should never happen - open should
3681 b->posn = PerlIO_tell(PerlIONext(f));
3683 posn = (b->posn / page_size) * page_size;
3684 len = st.st_size - posn;
3685 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3686 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3687 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3688 madvise(m->mptr, len, MADV_SEQUENTIAL);
3690 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3691 madvise(m->mptr, len, MADV_WILLNEED);
3693 PerlIOBase(f)->flags =
3694 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3695 b->end = ((STDCHAR *) m->mptr) + len;
3696 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3705 PerlIOBase(f)->flags =
3706 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3708 b->ptr = b->end = b->ptr;
3717 PerlIOMmap_unmap(PerlIO *f)
3719 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3720 PerlIOBuf *b = &m->base;
3724 code = munmap(m->mptr, m->len);
3728 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3731 b->ptr = b->end = b->buf;
3732 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3738 PerlIOMmap_get_base(PerlIO *f)
3740 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3741 PerlIOBuf *b = &m->base;
3742 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3744 * Already have a readbuffer in progress
3750 * We have a write buffer or flushed PerlIOBuf read buffer
3752 m->bbuf = b->buf; /* save it in case we need it again */
3753 b->buf = NULL; /* Clear to trigger below */
3756 PerlIOMmap_map(f); /* Try and map it */
3759 * Map did not work - recover PerlIOBuf buffer if we have one
3764 b->ptr = b->end = b->buf;
3767 return PerlIOBuf_get_base(f);
3771 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3773 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3774 PerlIOBuf *b = &m->base;
3775 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3777 if (b->ptr && (b->ptr - count) >= b->buf
3778 && memEQ(b->ptr - count, vbuf, count)) {
3780 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3785 * Loose the unwritable mapped buffer
3789 * If flush took the "buffer" see if we have one from before
3791 if (!b->buf && m->bbuf)
3794 PerlIOBuf_get_base(f);
3798 return PerlIOBuf_unread(f, vbuf, count);
3802 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3804 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3805 PerlIOBuf *b = &m->base;
3806 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3808 * No, or wrong sort of, buffer
3811 if (PerlIOMmap_unmap(f) != 0)
3815 * If unmap took the "buffer" see if we have one from before
3817 if (!b->buf && m->bbuf)
3820 PerlIOBuf_get_base(f);
3824 return PerlIOBuf_write(f, vbuf, count);
3828 PerlIOMmap_flush(PerlIO *f)
3830 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3831 PerlIOBuf *b = &m->base;
3832 IV code = PerlIOBuf_flush(f);
3834 * Now we are "synced" at PerlIOBuf level
3841 if (PerlIOMmap_unmap(f) != 0)
3846 * We seem to have a PerlIOBuf buffer which was not mapped
3847 * remember it in case we need one later
3856 PerlIOMmap_fill(PerlIO *f)
3858 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3859 IV code = PerlIO_flush(f);
3860 if (code == 0 && !b->buf) {
3861 code = PerlIOMmap_map(f);
3863 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3864 code = PerlIOBuf_fill(f);
3870 PerlIOMmap_close(PerlIO *f)
3872 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3873 PerlIOBuf *b = &m->base;
3874 IV code = PerlIO_flush(f);
3878 b->ptr = b->end = b->buf;
3880 if (PerlIOBuf_close(f) != 0)
3886 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3888 return PerlIOBase_dup(aTHX_ f, o, param);
3892 PerlIO_funcs PerlIO_mmap = {
3912 PerlIOBase_clearerr,
3913 PerlIOBase_setlinebuf,
3914 PerlIOMmap_get_base,
3918 PerlIOBuf_set_ptrcnt,
3921 #endif /* HAS_MMAP */
3926 /* Place holder for stdstreams call ??? */
3935 PerlIO_stdstreams(aTHX);
3937 return &PL_perlio[1];
3940 #undef PerlIO_stdout
3946 PerlIO_stdstreams(aTHX);
3948 return &PL_perlio[2];
3951 #undef PerlIO_stderr
3957 PerlIO_stdstreams(aTHX);
3959 return &PL_perlio[3];
3962 /*--------------------------------------------------------------------------------------*/
3964 #undef PerlIO_getname
3966 PerlIO_getname(PerlIO *f, char *buf)
3971 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3973 name = fgetname(stdio, buf);
3975 Perl_croak(aTHX_ "Don't know how to get file name");
3981 /*--------------------------------------------------------------------------------------*/
3983 * Functions which can be called on any kind of PerlIO implemented in
3989 PerlIO_getc(PerlIO *f)
3992 SSize_t count = PerlIO_read(f, buf, 1);
3994 return (unsigned char) buf[0];
3999 #undef PerlIO_ungetc
4001 PerlIO_ungetc(PerlIO *f, int ch)
4005 if (PerlIO_unread(f, &buf, 1) == 1)
4013 PerlIO_putc(PerlIO *f, int ch)
4016 return PerlIO_write(f, &buf, 1);
4021 PerlIO_puts(PerlIO *f, const char *s)
4023 STRLEN len = strlen(s);
4024 return PerlIO_write(f, s, len);
4027 #undef PerlIO_rewind
4029 PerlIO_rewind(PerlIO *f)
4031 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4035 #undef PerlIO_vprintf
4037 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4040 SV *sv = newSVpvn("", 0);
4046 Perl_va_copy(ap, apc);
4047 sv_vcatpvf(sv, fmt, &apc);
4049 sv_vcatpvf(sv, fmt, &ap);
4052 wrote = PerlIO_write(f, s, len);
4057 #undef PerlIO_printf
4059 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4064 result = PerlIO_vprintf(f, fmt, ap);
4069 #undef PerlIO_stdoutf
4071 PerlIO_stdoutf(const char *fmt, ...)
4076 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4081 #undef PerlIO_tmpfile
4083 PerlIO_tmpfile(void)
4086 * I have no idea how portable mkstemp() is ...
4088 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4091 FILE *stdio = PerlSIO_tmpfile();
4094 PerlIOSelf(PerlIO_push
4095 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4096 "w+", Nullsv), PerlIOStdio);
4102 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4103 int fd = mkstemp(SvPVX(sv));
4106 f = PerlIO_fdopen(fd, "w+");
4108 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4110 PerlLIO_unlink(SvPVX(sv));
4120 #endif /* USE_SFIO */
4121 #endif /* PERLIO_IS_STDIO */
4123 /*======================================================================================*/
4125 * Now some functions in terms of above which may be needed even if we are
4126 * not in true PerlIO mode
4130 #undef PerlIO_setpos
4132 PerlIO_setpos(PerlIO *f, SV *pos)
4137 Off_t *posn = (Off_t *) SvPV(pos, len);
4138 if (f && len == sizeof(Off_t))
4139 return PerlIO_seek(f, *posn, SEEK_SET);
4141 SETERRNO(EINVAL, SS$_IVCHAN);
4145 #undef PerlIO_setpos
4147 PerlIO_setpos(PerlIO *f, SV *pos)
4152 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4153 if (f && len == sizeof(Fpos_t)) {
4154 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4155 return fsetpos64(f, fpos);
4157 return fsetpos(f, fpos);
4161 SETERRNO(EINVAL, SS$_IVCHAN);
4167 #undef PerlIO_getpos
4169 PerlIO_getpos(PerlIO *f, SV *pos)
4172 Off_t posn = PerlIO_tell(f);
4173 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4174 return (posn == (Off_t) - 1) ? -1 : 0;
4177 #undef PerlIO_getpos
4179 PerlIO_getpos(PerlIO *f, SV *pos)
4184 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4185 code = fgetpos64(f, &fpos);
4187 code = fgetpos(f, &fpos);
4189 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4194 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4197 vprintf(char *pat, char *args)
4199 _doprnt(pat, args, stdout);
4200 return 0; /* wrong, but perl doesn't use the return
4205 vfprintf(FILE *fd, char *pat, char *args)
4207 _doprnt(pat, args, fd);
4208 return 0; /* wrong, but perl doesn't use the return
4214 #ifndef PerlIO_vsprintf
4216 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4218 int val = vsprintf(s, fmt, ap);
4220 if (strlen(s) >= (STRLEN) n) {
4222 (void) PerlIO_puts(Perl_error_log,
4223 "panic: sprintf overflow - memory corrupted!\n");
4231 #ifndef PerlIO_sprintf
4233 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4238 result = PerlIO_vsprintf(s, n, fmt, ap);