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 = sv_dup(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)
534 PerlIO **table = &proto->Iperlio;
537 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
538 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
539 PerlIO_allocate(aTHX); /* root slot is never used */
540 while ((f = *table)) {
542 table = (PerlIO **) (f++);
543 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
545 PerlIO_fdupopen(aTHX_ f, param);
555 PerlIO_cleantable(aTHX_ &PL_perlio);
559 PerlIO_destruct(pTHX)
561 PerlIO **table = &PL_perlio;
563 while ((f = *table)) {
565 table = (PerlIO **) (f++);
566 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
570 if (l->tab->kind & PERLIO_K_DESTRUCT) {
571 PerlIO_debug("Destruct popping %s\n", l->tab->name);
582 PerlIO_list_free(aTHX_ PL_known_layers);
583 PL_known_layers = NULL;
584 PerlIO_list_free(aTHX_ PL_def_layerlist);
585 PL_def_layerlist = NULL;
589 PerlIO_pop(pTHX_ PerlIO *f)
593 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
594 if (l->tab->Popped) {
596 * If popped returns non-zero do not free its layer structure
597 * it has either done so itself, or it is shared and still in
600 if ((*l->tab->Popped) (f) != 0)
608 /*--------------------------------------------------------------------------------------*/
610 * XS Interface for perl code
614 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
617 if ((SSize_t) len <= 0)
619 for (i = 0; i < PL_known_layers->cur; i++) {
620 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
621 if (memEQ(f->name, name, len)) {
622 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
626 if (load && PL_subname && PL_def_layerlist
627 && PL_def_layerlist->cur >= 2) {
628 SV *pkgsv = newSVpvn("PerlIO", 6);
629 SV *layer = newSVpvn(name, len);
632 * The two SVs are magically freed by load_module
634 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
636 return PerlIO_find_layer(aTHX_ name, len, 0);
638 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
642 #ifdef USE_ATTRIBUTES_FOR_PERLIO
645 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
648 IO *io = GvIOn((GV *) SvRV(sv));
649 PerlIO *ifp = IoIFP(io);
650 PerlIO *ofp = IoOFP(io);
651 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
657 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
660 IO *io = GvIOn((GV *) SvRV(sv));
661 PerlIO *ifp = IoIFP(io);
662 PerlIO *ofp = IoOFP(io);
663 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
669 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
671 Perl_warn(aTHX_ "clear %" SVf, sv);
676 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
678 Perl_warn(aTHX_ "free %" SVf, sv);
682 MGVTBL perlio_vtab = {
690 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
693 SV *sv = SvRV(ST(1));
698 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
700 mg = mg_find(sv, PERL_MAGIC_ext);
701 mg->mg_virtual = &perlio_vtab;
703 Perl_warn(aTHX_ "attrib %" SVf, sv);
704 for (i = 2; i < items; i++) {
706 const char *name = SvPV(ST(i), len);
707 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
709 av_push(av, SvREFCNT_inc(layer));
720 #endif /* USE_ATTIBUTES_FOR_PERLIO */
723 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
725 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
726 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
730 XS(XS_PerlIO__Layer__find)
734 Perl_croak(aTHX_ "Usage class->find(name[,load])");
737 char *name = SvPV(ST(1), len);
738 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
739 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
741 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
748 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
750 if (!PL_known_layers)
751 PL_known_layers = PerlIO_list_alloc(aTHX);
752 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
753 PerlIO_debug("define %s %p\n", tab->name, tab);
757 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
760 const char *s = names;
762 while (isSPACE(*s) || *s == ':')
767 const char *as = Nullch;
769 if (!isIDFIRST(*s)) {
771 * Message is consistent with how attribute lists are
772 * passed. Even though this means "foo : : bar" is
773 * seen as an invalid separator character.
775 char q = ((*s == '\'') ? '"' : '\'');
777 "perlio: invalid separator character %c%c%c in layer specification list",
783 } while (isALNUM(*e));
799 * It's a nul terminated string, not allowed
800 * to \ the terminating null. Anything other
801 * character is passed over.
812 "perlio: argument list not closed for layer \"%.*s\"",
824 PerlIO_funcs *layer =
825 PerlIO_find_layer(aTHX_ s, llen, 1);
827 PerlIO_list_push(aTHX_ av, layer,
833 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
846 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
848 PerlIO_funcs *tab = &PerlIO_perlio;
849 if (O_BINARY != O_TEXT) {
853 if (PerlIO_stdio.Set_ptrcnt) {
857 PerlIO_debug("Pushing %s\n", tab->name);
858 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
863 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
865 return av->array[n].arg;
869 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
871 if (n >= 0 && n < av->cur) {
872 PerlIO_debug("Layer %" IVdf " is %s\n", n,
873 av->array[n].funcs->name);
874 return av->array[n].funcs;
877 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
882 PerlIO_default_layers(pTHX)
884 if (!PL_def_layerlist) {
885 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
886 PerlIO_funcs *osLayer = &PerlIO_unix;
887 PL_def_layerlist = PerlIO_list_alloc(aTHX);
888 PerlIO_define_layer(aTHX_ & PerlIO_unix);
889 #if defined(WIN32) && !defined(UNDER_CE)
890 PerlIO_define_layer(aTHX_ & PerlIO_win32);
892 osLayer = &PerlIO_win32;
895 PerlIO_define_layer(aTHX_ & PerlIO_raw);
896 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
897 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
898 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
900 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
902 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
903 PerlIO_define_layer(aTHX_ & PerlIO_byte);
904 PerlIO_list_push(aTHX_ PL_def_layerlist,
905 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
908 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
911 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
914 if (PL_def_layerlist->cur < 2) {
915 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
917 return PL_def_layerlist;
921 Perl_boot_core_PerlIO(pTHX)
923 #ifdef USE_ATTRIBUTES_FOR_PERLIO
924 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
927 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
931 PerlIO_default_layer(pTHX_ I32 n)
933 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
936 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
939 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
940 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
943 PerlIO_stdstreams(pTHX)
946 PerlIO_allocate(aTHX);
947 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
948 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
949 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
954 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
957 Newc('L',l,tab->size,char,PerlIOl);
959 Zero(l, tab->size, char);
963 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
964 (mode) ? mode : "(Null)", arg);
965 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
974 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
987 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
990 * Remove the dummy layer
995 * Pop back to bottom layer
999 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1000 if (*PerlIONext(f)) {
1001 PerlIO_pop(aTHX_ f);
1005 * Nothing bellow - push unix on top then remove it
1007 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1008 PerlIO_pop(aTHX_ PerlIONext(f));
1013 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1020 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1021 PerlIO_list_t *layers, IV n)
1023 IV max = layers->cur;
1026 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1028 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1039 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1043 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1044 code = PerlIO_parse_layers(aTHX_ layers, names);
1046 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1048 PerlIO_list_free(aTHX_ layers);
1054 /*--------------------------------------------------------------------------------------*/
1056 * Given the abstraction above the public API functions
1060 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1062 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1063 f, PerlIOBase(f)->tab->name, iotype, mode,
1064 (names) ? names : "(Null)");
1066 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1069 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1070 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1073 top = PerlIONext(top);
1077 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1080 #undef PerlIO__close
1082 PerlIO__close(PerlIO *f)
1085 return (*PerlIOBase(f)->tab->Close) (f);
1087 SETERRNO(EBADF, SS$_IVCHAN);
1094 PerlIO_close(PerlIO *f)
1099 code = (*PerlIOBase(f)->tab->Close) (f);
1101 PerlIO_pop(aTHX_ f);
1107 #undef PerlIO_fileno
1109 PerlIO_fileno(PerlIO *f)
1112 return (*PerlIOBase(f)->tab->Fileno) (f);
1114 SETERRNO(EBADF, SS$_IVCHAN);
1120 PerlIO_context_layers(pTHX_ const char *mode)
1122 const char *type = NULL;
1124 * Need to supply default layer info from open.pm
1127 SV *layers = PL_curcop->cop_io;
1130 type = SvPV(layers, len);
1131 if (type && mode[0] != 'r') {
1133 * Skip to write part
1135 const char *s = strchr(type, 0);
1136 if (s && (s - type) < len) {
1145 static PerlIO_funcs *
1146 PerlIO_layer_from_ref(pTHX_ SV *sv)
1149 * For any scalar type load the handler which is bundled with perl
1151 if (SvTYPE(sv) < SVt_PVAV)
1152 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1155 * For other types allow if layer is known but don't try and load it
1157 switch (SvTYPE(sv)) {
1159 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1161 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1163 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1165 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1171 PerlIO_resolve_layers(pTHX_ const char *layers,
1172 const char *mode, int narg, SV **args)
1174 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1177 PerlIO_stdstreams(aTHX);
1181 * If it is a reference but not an object see if we have a handler
1184 if (SvROK(arg) && !sv_isobject(arg)) {
1185 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1187 def = PerlIO_list_alloc(aTHX);
1188 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1192 * Don't fail if handler cannot be found :Via(...) etc. may do
1193 * something sensible else we will just stringfy and open
1199 layers = PerlIO_context_layers(aTHX_ mode);
1200 if (layers && *layers) {
1204 av = PerlIO_list_alloc(aTHX);
1205 for (i = 0; i < def->cur; i++) {
1206 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1213 PerlIO_parse_layers(aTHX_ av, layers);
1224 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1225 int imode, int perm, PerlIO *f, int narg, SV **args)
1227 if (!f && narg == 1 && *args == &PL_sv_undef) {
1228 if ((f = PerlIO_tmpfile())) {
1230 layers = PerlIO_context_layers(aTHX_ mode);
1231 if (layers && *layers)
1232 PerlIO_apply_layers(aTHX_ f, mode, layers);
1236 PerlIO_list_t *layera = NULL;
1238 PerlIO_funcs *tab = NULL;
1241 * This is "reopen" - it is not tested as perl does not use it
1245 layera = PerlIO_list_alloc(aTHX);
1248 (l->tab->Getarg) ? (*l->tab->
1249 Getarg) (&l) : &PL_sv_undef;
1250 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1251 l = *PerlIONext(&l);
1255 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1258 * Start at "top" of layer stack
1260 n = layera->cur - 1;
1262 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1271 * Found that layer 'n' can do opens - call it
1273 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1274 tab->name, layers, mode, fd, imode, perm, f, narg,
1276 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1279 if (n + 1 < layera->cur) {
1281 * More layers above the one that we used to open -
1284 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1291 PerlIO_list_free(aTHX_ layera);
1297 #undef PerlIO_fdopen
1299 PerlIO_fdopen(int fd, const char *mode)
1302 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1307 PerlIO_open(const char *path, const char *mode)
1310 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1311 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1314 #undef PerlIO_reopen
1316 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1319 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1320 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1325 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1328 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1330 SETERRNO(EBADF, SS$_IVCHAN);
1335 #undef PerlIO_unread
1337 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1340 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1342 SETERRNO(EBADF, SS$_IVCHAN);
1349 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1352 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1354 SETERRNO(EBADF, SS$_IVCHAN);
1361 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1364 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1366 SETERRNO(EBADF, SS$_IVCHAN);
1373 PerlIO_tell(PerlIO *f)
1376 return (*PerlIOBase(f)->tab->Tell) (f);
1378 SETERRNO(EBADF, SS$_IVCHAN);
1385 PerlIO_flush(PerlIO *f)
1389 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1390 if (tab && tab->Flush) {
1391 return (*tab->Flush) (f);
1394 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1395 SETERRNO(EBADF, SS$_IVCHAN);
1400 PerlIO_debug("Cannot flush f=%p\n", f);
1401 SETERRNO(EBADF, SS$_IVCHAN);
1407 * Is it good API design to do flush-all on NULL, a potentially
1408 * errorneous input? Maybe some magical value (PerlIO*
1409 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1410 * things on fflush(NULL), but should we be bound by their design
1414 PerlIO **table = &PL_perlio;
1416 while ((f = *table)) {
1418 table = (PerlIO **) (f++);
1419 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1420 if (*f && PerlIO_flush(f) != 0)
1430 PerlIOBase_flush_linebuf()
1433 PerlIO **table = &PL_perlio;
1435 while ((f = *table)) {
1437 table = (PerlIO **) (f++);
1438 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1441 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1442 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1451 PerlIO_fill(PerlIO *f)
1454 return (*PerlIOBase(f)->tab->Fill) (f);
1456 SETERRNO(EBADF, SS$_IVCHAN);
1461 #undef PerlIO_isutf8
1463 PerlIO_isutf8(PerlIO *f)
1466 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1468 SETERRNO(EBADF, SS$_IVCHAN);
1475 PerlIO_eof(PerlIO *f)
1478 return (*PerlIOBase(f)->tab->Eof) (f);
1480 SETERRNO(EBADF, SS$_IVCHAN);
1487 PerlIO_error(PerlIO *f)
1490 return (*PerlIOBase(f)->tab->Error) (f);
1492 SETERRNO(EBADF, SS$_IVCHAN);
1497 #undef PerlIO_clearerr
1499 PerlIO_clearerr(PerlIO *f)
1502 (*PerlIOBase(f)->tab->Clearerr) (f);
1504 SETERRNO(EBADF, SS$_IVCHAN);
1507 #undef PerlIO_setlinebuf
1509 PerlIO_setlinebuf(PerlIO *f)
1512 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1514 SETERRNO(EBADF, SS$_IVCHAN);
1517 #undef PerlIO_has_base
1519 PerlIO_has_base(PerlIO *f)
1522 return (PerlIOBase(f)->tab->Get_base != NULL);
1527 #undef PerlIO_fast_gets
1529 PerlIO_fast_gets(PerlIO *f)
1531 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1532 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1533 return (tab->Set_ptrcnt != NULL);
1538 #undef PerlIO_has_cntptr
1540 PerlIO_has_cntptr(PerlIO *f)
1543 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1544 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1549 #undef PerlIO_canset_cnt
1551 PerlIO_canset_cnt(PerlIO *f)
1554 PerlIOl *l = PerlIOBase(f);
1555 return (l->tab->Set_ptrcnt != NULL);
1560 #undef PerlIO_get_base
1562 PerlIO_get_base(PerlIO *f)
1565 return (*PerlIOBase(f)->tab->Get_base) (f);
1569 #undef PerlIO_get_bufsiz
1571 PerlIO_get_bufsiz(PerlIO *f)
1574 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1578 #undef PerlIO_get_ptr
1580 PerlIO_get_ptr(PerlIO *f)
1582 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1583 if (tab->Get_ptr == NULL)
1585 return (*tab->Get_ptr) (f);
1588 #undef PerlIO_get_cnt
1590 PerlIO_get_cnt(PerlIO *f)
1592 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1593 if (tab->Get_cnt == NULL)
1595 return (*tab->Get_cnt) (f);
1598 #undef PerlIO_set_cnt
1600 PerlIO_set_cnt(PerlIO *f, int cnt)
1602 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1605 #undef PerlIO_set_ptrcnt
1607 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1609 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1610 if (tab->Set_ptrcnt == NULL) {
1612 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1614 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1617 /*--------------------------------------------------------------------------------------*/
1619 * utf8 and raw dummy layers
1623 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1625 if (PerlIONext(f)) {
1627 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1628 PerlIO_pop(aTHX_ f);
1629 if (tab->kind & PERLIO_K_UTF8)
1630 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1632 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1638 PerlIO_funcs PerlIO_utf8 = {
1641 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1659 NULL, /* get_base */
1660 NULL, /* get_bufsiz */
1663 NULL, /* set_ptrcnt */
1666 PerlIO_funcs PerlIO_byte = {
1687 NULL, /* get_base */
1688 NULL, /* get_bufsiz */
1691 NULL, /* set_ptrcnt */
1695 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1696 IV n, const char *mode, int fd, int imode, int perm,
1697 PerlIO *old, int narg, SV **args)
1699 PerlIO_funcs *tab = PerlIO_default_btm();
1700 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1704 PerlIO_funcs PerlIO_raw = {
1725 NULL, /* get_base */
1726 NULL, /* get_bufsiz */
1729 NULL, /* set_ptrcnt */
1731 /*--------------------------------------------------------------------------------------*/
1732 /*--------------------------------------------------------------------------------------*/
1734 * "Methods" of the "base class"
1738 PerlIOBase_fileno(PerlIO *f)
1740 return PerlIO_fileno(PerlIONext(f));
1744 PerlIO_modestr(PerlIO *f, char *buf)
1747 IV flags = PerlIOBase(f)->flags;
1748 if (flags & PERLIO_F_APPEND) {
1750 if (flags & PERLIO_F_CANREAD) {
1754 else if (flags & PERLIO_F_CANREAD) {
1756 if (flags & PERLIO_F_CANWRITE)
1759 else if (flags & PERLIO_F_CANWRITE) {
1761 if (flags & PERLIO_F_CANREAD) {
1765 #if O_TEXT != O_BINARY
1766 if (!(flags & PERLIO_F_CRLF))
1774 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1776 PerlIOl *l = PerlIOBase(f);
1778 const char *omode = mode;
1781 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1782 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1783 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1784 if (tab->Set_ptrcnt != NULL)
1785 l->flags |= PERLIO_F_FASTGETS;
1787 if (*mode == '#' || *mode == 'I')
1791 l->flags |= PERLIO_F_CANREAD;
1794 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1797 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1800 SETERRNO(EINVAL, LIB$_INVARG);
1806 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1809 l->flags &= ~PERLIO_F_CRLF;
1812 l->flags |= PERLIO_F_CRLF;
1815 SETERRNO(EINVAL, LIB$_INVARG);
1822 l->flags |= l->next->flags &
1823 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1828 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1829 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1830 l->flags, PerlIO_modestr(f, temp));
1836 PerlIOBase_popped(PerlIO *f)
1842 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1846 * Save the position as current head considers it
1848 Off_t old = PerlIO_tell(f);
1850 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1851 PerlIOSelf(f, PerlIOBuf)->posn = old;
1852 done = PerlIOBuf_unread(f, vbuf, count);
1857 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1859 STDCHAR *buf = (STDCHAR *) vbuf;
1861 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1864 SSize_t avail = PerlIO_get_cnt(f);
1867 take = (count < avail) ? count : avail;
1869 STDCHAR *ptr = PerlIO_get_ptr(f);
1870 Copy(ptr, buf, take, STDCHAR);
1871 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1875 if (count > 0 && avail <= 0) {
1876 if (PerlIO_fill(f) != 0)
1880 return (buf - (STDCHAR *) vbuf);
1886 PerlIOBase_noop_ok(PerlIO *f)
1892 PerlIOBase_noop_fail(PerlIO *f)
1898 PerlIOBase_close(PerlIO *f)
1901 PerlIO *n = PerlIONext(f);
1902 if (PerlIO_flush(f) != 0)
1904 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1906 PerlIOBase(f)->flags &=
1907 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1912 PerlIOBase_eof(PerlIO *f)
1915 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1921 PerlIOBase_error(PerlIO *f)
1924 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1930 PerlIOBase_clearerr(PerlIO *f)
1933 PerlIO *n = PerlIONext(f);
1934 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1941 PerlIOBase_setlinebuf(PerlIO *f)
1944 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1948 /*--------------------------------------------------------------------------------------*/
1950 * Bottom-most level for UNIX-like case
1954 struct _PerlIO base; /* The generic part */
1955 int fd; /* UNIX like file descriptor */
1956 int oflags; /* open/fcntl flags */
1960 PerlIOUnix_oflags(const char *mode)
1963 if (*mode == 'I' || *mode == '#')
1968 if (*++mode == '+') {
1975 oflags = O_CREAT | O_TRUNC;
1976 if (*++mode == '+') {
1985 oflags = O_CREAT | O_APPEND;
1986 if (*++mode == '+') {
1999 else if (*mode == 't') {
2001 oflags &= ~O_BINARY;
2005 * Always open in binary mode
2008 if (*mode || oflags == -1) {
2009 SETERRNO(EINVAL, LIB$_INVARG);
2016 PerlIOUnix_fileno(PerlIO *f)
2018 return PerlIOSelf(f, PerlIOUnix)->fd;
2022 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2024 IV code = PerlIOBase_pushed(f, mode, arg);
2025 if (*PerlIONext(f)) {
2026 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2027 s->fd = PerlIO_fileno(PerlIONext(f));
2029 * XXX could (or should) we retrieve the oflags from the open file
2030 * handle rather than believing the "mode" we are passed in? XXX
2031 * Should the value on NULL mode be 0 or -1?
2033 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2035 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2040 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2041 IV n, const char *mode, int fd, int imode,
2042 int perm, PerlIO *f, int narg, SV **args)
2045 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2046 (*PerlIOBase(f)->tab->Close) (f);
2049 char *path = SvPV_nolen(*args);
2053 imode = PerlIOUnix_oflags(mode);
2057 fd = PerlLIO_open3(path, imode, perm);
2065 f = PerlIO_allocate(aTHX);
2066 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2070 s = PerlIOSelf(f, PerlIOUnix);
2073 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2079 * FIXME: pop layers ???
2087 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2093 return sv_dup(arg, param);
2096 return newSVsv(arg);
2099 return newSVsv(arg);
2104 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2106 PerlIO *nexto = PerlIONext(o);
2108 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2109 f = (*tab->Dup)(aTHX_ f, nexto, param);
2112 PerlIO_funcs *self = PerlIOBase(o)->tab;
2115 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
2117 arg = (*self->Getarg)(o);
2119 arg = PerlIO_sv_dup(aTHX_ arg, param);
2122 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2131 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2133 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2134 int fd = PerlLIO_dup(os->fd);
2136 f = PerlIOBase_dup(aTHX_ f, o, param);
2138 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2139 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2152 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2155 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2156 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2159 SSize_t len = PerlLIO_read(fd, vbuf, count);
2160 if (len >= 0 || errno != EINTR) {
2162 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2163 else if (len == 0 && count != 0)
2164 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2172 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2175 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2177 SSize_t len = PerlLIO_write(fd, vbuf, count);
2178 if (len >= 0 || errno != EINTR) {
2180 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2188 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2192 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2193 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2194 return (new == (Off_t) - 1) ? -1 : 0;
2198 PerlIOUnix_tell(PerlIO *f)
2201 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2206 PerlIOUnix_close(PerlIO *f)
2209 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2211 while (PerlLIO_close(fd) != 0) {
2212 if (errno != EINTR) {
2219 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2224 PerlIO_funcs PerlIO_unix = {
2240 PerlIOBase_noop_ok, /* flush */
2241 PerlIOBase_noop_fail, /* fill */
2244 PerlIOBase_clearerr,
2245 PerlIOBase_setlinebuf,
2246 NULL, /* get_base */
2247 NULL, /* get_bufsiz */
2250 NULL, /* set_ptrcnt */
2253 /*--------------------------------------------------------------------------------------*/
2259 struct _PerlIO base;
2260 FILE *stdio; /* The stream */
2264 PerlIOStdio_fileno(PerlIO *f)
2267 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2271 PerlIOStdio_mode(const char *mode, char *tmode)
2277 if (O_BINARY != O_TEXT) {
2285 * This isn't used yet ...
2288 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2290 if (*PerlIONext(f)) {
2292 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2295 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2296 PerlIOStdio_mode(mode, tmode));
2302 return PerlIOBase_pushed(f, mode, arg);
2305 #undef PerlIO_importFILE
2307 PerlIO_importFILE(FILE *stdio, int fl)
2313 PerlIOSelf(PerlIO_push
2314 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2315 "r+", Nullsv), PerlIOStdio);
2322 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2323 IV n, const char *mode, int fd, int imode,
2324 int perm, PerlIO *f, int narg, SV **args)
2328 char *path = SvPV_nolen(*args);
2329 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2331 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2340 char *path = SvPV_nolen(*args);
2343 fd = PerlLIO_open3(path, imode, perm);
2346 FILE *stdio = PerlSIO_fopen(path, mode);
2349 PerlIOSelf(PerlIO_push
2350 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2351 (mode = PerlIOStdio_mode(mode, tmode)),
2369 stdio = PerlSIO_stdin;
2372 stdio = PerlSIO_stdout;
2375 stdio = PerlSIO_stderr;
2380 stdio = PerlSIO_fdopen(fd, mode =
2381 PerlIOStdio_mode(mode, tmode));
2385 PerlIOSelf(PerlIO_push
2386 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2387 mode, PerlIOArg), PerlIOStdio);
2397 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2400 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2403 STDCHAR *buf = (STDCHAR *) vbuf;
2405 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2406 * stdio does not do that for fread()
2408 int ch = PerlSIO_fgetc(s);
2415 got = PerlSIO_fread(vbuf, 1, count, s);
2420 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2423 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2424 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2427 int ch = *buf-- & 0xff;
2428 if (PerlSIO_ungetc(ch, s) != ch)
2437 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2440 return PerlSIO_fwrite(vbuf, 1, count,
2441 PerlIOSelf(f, PerlIOStdio)->stdio);
2445 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2448 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2449 return PerlSIO_fseek(stdio, offset, whence);
2453 PerlIOStdio_tell(PerlIO *f)
2456 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2457 return PerlSIO_ftell(stdio);
2461 PerlIOStdio_close(PerlIO *f)
2464 #ifdef SOCKS5_VERSION_NAME
2466 Sock_size_t optlen = sizeof(int);
2468 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2470 #ifdef SOCKS5_VERSION_NAME
2472 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2474 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2476 PerlSIO_fclose(stdio)
2483 PerlIOStdio_flush(PerlIO *f)
2486 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2487 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2488 return PerlSIO_fflush(stdio);
2493 * FIXME: This discards ungetc() and pre-read stuff which is not
2494 * right if this is just a "sync" from a layer above Suspect right
2495 * design is to do _this_ but not have layer above flush this
2496 * layer read-to-read
2499 * Not writeable - sync by attempting a seek
2502 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2510 PerlIOStdio_fill(PerlIO *f)
2513 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2516 * fflush()ing read-only streams can cause trouble on some stdio-s
2518 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2519 if (PerlSIO_fflush(stdio) != 0)
2522 c = PerlSIO_fgetc(stdio);
2523 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2529 PerlIOStdio_eof(PerlIO *f)
2532 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2536 PerlIOStdio_error(PerlIO *f)
2539 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2543 PerlIOStdio_clearerr(PerlIO *f)
2546 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2550 PerlIOStdio_setlinebuf(PerlIO *f)
2553 #ifdef HAS_SETLINEBUF
2554 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2556 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2562 PerlIOStdio_get_base(PerlIO *f)
2565 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2566 return PerlSIO_get_base(stdio);
2570 PerlIOStdio_get_bufsiz(PerlIO *f)
2573 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2574 return PerlSIO_get_bufsiz(stdio);
2578 #ifdef USE_STDIO_PTR
2580 PerlIOStdio_get_ptr(PerlIO *f)
2583 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2584 return PerlSIO_get_ptr(stdio);
2588 PerlIOStdio_get_cnt(PerlIO *f)
2591 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2592 return PerlSIO_get_cnt(stdio);
2596 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2598 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2601 #ifdef STDIO_PTR_LVALUE
2602 PerlSIO_set_ptr(stdio, ptr);
2603 #ifdef STDIO_PTR_LVAL_SETS_CNT
2604 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2606 assert(PerlSIO_get_cnt(stdio) == (cnt));
2609 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2611 * Setting ptr _does_ change cnt - we are done
2615 #else /* STDIO_PTR_LVALUE */
2617 #endif /* STDIO_PTR_LVALUE */
2620 * Now (or only) set cnt
2622 #ifdef STDIO_CNT_LVALUE
2623 PerlSIO_set_cnt(stdio, cnt);
2624 #else /* STDIO_CNT_LVALUE */
2625 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2626 PerlSIO_set_ptr(stdio,
2627 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2629 #else /* STDIO_PTR_LVAL_SETS_CNT */
2631 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2632 #endif /* STDIO_CNT_LVALUE */
2638 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2640 /* This assumes no layers underneath - which is what
2641 happens, but is not how I remember it. NI-S 2001/10/16
2643 int fd = PerlLIO_dup(PerlIO_fileno(o));
2646 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2648 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2649 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2652 PerlSIO_fclose(stdio);
2663 PerlIO_funcs PerlIO_stdio = {
2665 sizeof(PerlIOStdio),
2683 PerlIOStdio_clearerr,
2684 PerlIOStdio_setlinebuf,
2686 PerlIOStdio_get_base,
2687 PerlIOStdio_get_bufsiz,
2692 #ifdef USE_STDIO_PTR
2693 PerlIOStdio_get_ptr,
2694 PerlIOStdio_get_cnt,
2695 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2696 PerlIOStdio_set_ptrcnt
2697 #else /* STDIO_PTR_LVALUE */
2699 #endif /* STDIO_PTR_LVALUE */
2700 #else /* USE_STDIO_PTR */
2704 #endif /* USE_STDIO_PTR */
2707 #undef PerlIO_exportFILE
2709 PerlIO_exportFILE(PerlIO *f, int fl)
2713 stdio = fdopen(PerlIO_fileno(f), "r+");
2717 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2724 #undef PerlIO_findFILE
2726 PerlIO_findFILE(PerlIO *f)
2730 if (l->tab == &PerlIO_stdio) {
2731 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2734 l = *PerlIONext(&l);
2736 return PerlIO_exportFILE(f, 0);
2739 #undef PerlIO_releaseFILE
2741 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2745 /*--------------------------------------------------------------------------------------*/
2747 * perlio buffer layer
2751 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2754 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2755 int fd = PerlIO_fileno(f);
2757 if (fd >= 0 && PerlLIO_isatty(fd)) {
2758 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2760 posn = PerlIO_tell(PerlIONext(f));
2761 if (posn != (Off_t) - 1) {
2764 return PerlIOBase_pushed(f, mode, arg);
2768 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2769 IV n, const char *mode, int fd, int imode, int perm,
2770 PerlIO *f, int narg, SV **args)
2773 PerlIO *next = PerlIONext(f);
2775 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2777 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2780 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2786 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2794 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2797 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2798 fd = PerlIO_fileno(f);
2799 #if O_BINARY != O_TEXT
2801 * do something about failing setmode()? --jhi
2803 PerlLIO_setmode(fd, O_BINARY);
2805 if (init && fd == 2) {
2807 * Initial stderr is unbuffered
2809 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2817 * This "flush" is akin to sfio's sync in that it handles files in either
2818 * read or write state
2821 PerlIOBuf_flush(PerlIO *f)
2823 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2825 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2827 * write() the buffer
2829 STDCHAR *buf = b->buf;
2831 PerlIO *n = PerlIONext(f);
2832 while (p < b->ptr) {
2833 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2837 else if (count < 0 || PerlIO_error(n)) {
2838 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2843 b->posn += (p - buf);
2845 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2846 STDCHAR *buf = PerlIO_get_base(f);
2848 * Note position change
2850 b->posn += (b->ptr - buf);
2851 if (b->ptr < b->end) {
2853 * We did not consume all of it
2855 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2856 b->posn = PerlIO_tell(PerlIONext(f));
2860 b->ptr = b->end = b->buf;
2861 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2863 * FIXME: Is this right for read case ?
2865 if (PerlIO_flush(PerlIONext(f)) != 0)
2871 PerlIOBuf_fill(PerlIO *f)
2873 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2874 PerlIO *n = PerlIONext(f);
2877 * FIXME: doing the down-stream flush is a bad idea if it causes
2878 * pre-read data in stdio buffer to be discarded but this is too
2879 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2880 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2882 if (PerlIO_flush(f) != 0)
2884 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2885 PerlIOBase_flush_linebuf();
2888 PerlIO_get_base(f); /* allocate via vtable */
2890 b->ptr = b->end = b->buf;
2891 if (PerlIO_fast_gets(n)) {
2893 * Layer below is also buffered We do _NOT_ want to call its
2894 * ->Read() because that will loop till it gets what we asked for
2895 * which may hang on a pipe etc. Instead take anything it has to
2896 * hand, or ask it to fill _once_.
2898 avail = PerlIO_get_cnt(n);
2900 avail = PerlIO_fill(n);
2902 avail = PerlIO_get_cnt(n);
2904 if (!PerlIO_error(n) && PerlIO_eof(n))
2909 STDCHAR *ptr = PerlIO_get_ptr(n);
2910 SSize_t cnt = avail;
2911 if (avail > b->bufsiz)
2913 Copy(ptr, b->buf, avail, STDCHAR);
2914 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2918 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2922 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2924 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2927 b->end = b->buf + avail;
2928 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2933 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2935 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2939 return PerlIOBase_read(f, vbuf, count);
2945 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2947 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2948 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2951 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2956 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2958 * Buffer is already a read buffer, we can overwrite any chars
2959 * which have been read back to buffer start
2961 avail = (b->ptr - b->buf);
2965 * Buffer is idle, set it up so whole buffer is available for
2969 b->end = b->buf + avail;
2971 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2973 * Buffer extends _back_ from where we are now
2975 b->posn -= b->bufsiz;
2977 if (avail > (SSize_t) count) {
2979 * If we have space for more than count, just move count
2987 * In simple stdio-like ungetc() case chars will be already
2990 if (buf != b->ptr) {
2991 Copy(buf, b->ptr, avail, STDCHAR);
2995 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3002 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3004 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3005 const STDCHAR *buf = (const STDCHAR *) vbuf;
3009 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3012 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3013 if ((SSize_t) count < avail)
3015 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3016 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3031 Copy(buf, b->ptr, avail, STDCHAR);
3038 if (b->ptr >= (b->buf + b->bufsiz))
3041 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3047 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3050 if ((code = PerlIO_flush(f)) == 0) {
3051 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3052 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3053 code = PerlIO_seek(PerlIONext(f), offset, whence);
3055 b->posn = PerlIO_tell(PerlIONext(f));
3062 PerlIOBuf_tell(PerlIO *f)
3064 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3066 * b->posn is file position where b->buf was read, or will be written
3068 Off_t posn = b->posn;
3071 * If buffer is valid adjust position by amount in buffer
3073 posn += (b->ptr - b->buf);
3079 PerlIOBuf_close(PerlIO *f)
3081 IV code = PerlIOBase_close(f);
3082 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3083 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3087 b->ptr = b->end = b->buf;
3088 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3093 PerlIOBuf_get_ptr(PerlIO *f)
3095 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3102 PerlIOBuf_get_cnt(PerlIO *f)
3104 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3107 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3108 return (b->end - b->ptr);
3113 PerlIOBuf_get_base(PerlIO *f)
3115 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3120 Newz('B',b->buf,b->bufsiz, STDCHAR);
3122 b->buf = (STDCHAR *) & b->oneword;
3123 b->bufsiz = sizeof(b->oneword);
3132 PerlIOBuf_bufsiz(PerlIO *f)
3134 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3137 return (b->end - b->buf);
3141 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3143 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3147 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3149 assert(PerlIO_get_cnt(f) == cnt);
3150 assert(b->ptr >= b->buf);
3152 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3156 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3158 return PerlIOBase_dup(aTHX_ f, o, param);
3163 PerlIO_funcs PerlIO_perlio = {
3183 PerlIOBase_clearerr,
3184 PerlIOBase_setlinebuf,
3189 PerlIOBuf_set_ptrcnt,
3192 /*--------------------------------------------------------------------------------------*/
3194 * Temp layer to hold unread chars when cannot do it any other way
3198 PerlIOPending_fill(PerlIO *f)
3201 * Should never happen
3208 PerlIOPending_close(PerlIO *f)
3211 * A tad tricky - flush pops us, then we close new top
3214 return PerlIO_close(f);
3218 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3221 * A tad tricky - flush pops us, then we seek new top
3224 return PerlIO_seek(f, offset, whence);
3229 PerlIOPending_flush(PerlIO *f)
3232 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3233 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3237 PerlIO_pop(aTHX_ f);
3242 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3248 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3253 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3255 IV code = PerlIOBase_pushed(f, mode, arg);
3256 PerlIOl *l = PerlIOBase(f);
3258 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3259 * etc. get muddled when it changes mid-string when we auto-pop.
3261 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3262 (PerlIOBase(PerlIONext(f))->
3263 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3268 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3270 SSize_t avail = PerlIO_get_cnt(f);
3275 got = PerlIOBuf_read(f, vbuf, avail);
3276 if (got >= 0 && got < count) {
3278 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3279 if (more >= 0 || got == 0)
3285 PerlIO_funcs PerlIO_pending = {
3289 PerlIOPending_pushed,
3300 PerlIOPending_close,
3301 PerlIOPending_flush,
3305 PerlIOBase_clearerr,
3306 PerlIOBase_setlinebuf,
3311 PerlIOPending_set_ptrcnt,
3316 /*--------------------------------------------------------------------------------------*/
3318 * crlf - translation On read translate CR,LF to "\n" we do this by
3319 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3320 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3324 PerlIOBuf base; /* PerlIOBuf stuff */
3325 STDCHAR *nl; /* Position of crlf we "lied" about in the
3330 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3333 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3334 code = PerlIOBuf_pushed(f, mode, arg);
3336 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3337 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3338 PerlIOBase(f)->flags);
3345 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3347 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3352 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3353 return PerlIOBuf_unread(f, vbuf, count);
3355 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3356 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3358 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3363 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3364 b->end = b->ptr = b->buf + b->bufsiz;
3365 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3366 b->posn -= b->bufsiz;
3368 while (count > 0 && b->ptr > b->buf) {
3371 if (b->ptr - 2 >= b->buf) {
3394 PerlIOCrlf_get_cnt(PerlIO *f)
3396 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3399 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3400 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3401 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3402 STDCHAR *nl = b->ptr;
3404 while (nl < b->end && *nl != 0xd)
3406 if (nl < b->end && *nl == 0xd) {
3408 if (nl + 1 < b->end) {
3415 * Not CR,LF but just CR
3423 * Blast - found CR as last char in buffer
3427 * They may not care, defer work as long as
3430 return (nl - b->ptr);
3434 b->ptr++; /* say we have read it as far as
3435 * flush() is concerned */
3436 b->buf++; /* Leave space an front of buffer */
3437 b->bufsiz--; /* Buffer is thus smaller */
3438 code = PerlIO_fill(f); /* Fetch some more */
3439 b->bufsiz++; /* Restore size for next time */
3440 b->buf--; /* Point at space */
3441 b->ptr = nl = b->buf; /* Which is what we hand
3443 b->posn--; /* Buffer starts here */
3444 *nl = 0xd; /* Fill in the CR */
3446 goto test; /* fill() call worked */
3448 * CR at EOF - just fall through
3454 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3460 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3462 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3463 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3464 IV flags = PerlIOBase(f)->flags;
3472 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3479 * Test code - delete when it works ...
3486 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3493 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3494 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3501 * They have taken what we lied about
3509 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3513 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3515 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3516 return PerlIOBuf_write(f, vbuf, count);
3518 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3519 const STDCHAR *buf = (const STDCHAR *) vbuf;
3520 const STDCHAR *ebuf = buf + count;
3523 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3525 while (buf < ebuf) {
3526 STDCHAR *eptr = b->buf + b->bufsiz;
3527 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3528 while (buf < ebuf && b->ptr < eptr) {
3530 if ((b->ptr + 2) > eptr) {
3538 *(b->ptr)++ = 0xd; /* CR */
3539 *(b->ptr)++ = 0xa; /* LF */
3541 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3551 if (b->ptr >= eptr) {
3557 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3559 return (buf - (STDCHAR *) vbuf);
3564 PerlIOCrlf_flush(PerlIO *f)
3566 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3571 return PerlIOBuf_flush(f);
3574 PerlIO_funcs PerlIO_crlf = {
3577 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3579 PerlIOBase_noop_ok, /* popped */
3584 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3586 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3587 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3595 PerlIOBase_clearerr,
3596 PerlIOBase_setlinebuf,
3601 PerlIOCrlf_set_ptrcnt,
3605 /*--------------------------------------------------------------------------------------*/
3607 * mmap as "buffer" layer
3611 PerlIOBuf base; /* PerlIOBuf stuff */
3612 Mmap_t mptr; /* Mapped address */
3613 Size_t len; /* mapped length */
3614 STDCHAR *bbuf; /* malloced buffer if map fails */
3617 static size_t page_size = 0;
3620 PerlIOMmap_map(PerlIO *f)
3623 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3624 IV flags = PerlIOBase(f)->flags;
3628 if (flags & PERLIO_F_CANREAD) {
3629 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3630 int fd = PerlIO_fileno(f);
3632 code = fstat(fd, &st);
3633 if (code == 0 && S_ISREG(st.st_mode)) {
3634 SSize_t len = st.st_size - b->posn;
3638 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3640 SETERRNO(0, SS$_NORMAL);
3641 # ifdef _SC_PAGESIZE
3642 page_size = sysconf(_SC_PAGESIZE);
3644 page_size = sysconf(_SC_PAGE_SIZE);
3646 if ((long) page_size < 0) {
3651 (void) SvUPGRADE(error, SVt_PV);
3652 msg = SvPVx(error, n_a);
3653 Perl_croak(aTHX_ "panic: sysconf: %s",
3658 "panic: sysconf: pagesize unknown");
3662 # ifdef HAS_GETPAGESIZE
3663 page_size = getpagesize();
3665 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3666 page_size = PAGESIZE; /* compiletime, bad */
3670 if ((IV) page_size <= 0)
3671 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3676 * This is a hack - should never happen - open should
3679 b->posn = PerlIO_tell(PerlIONext(f));
3681 posn = (b->posn / page_size) * page_size;
3682 len = st.st_size - posn;
3683 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3684 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3685 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3686 madvise(m->mptr, len, MADV_SEQUENTIAL);
3688 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3689 madvise(m->mptr, len, MADV_WILLNEED);
3691 PerlIOBase(f)->flags =
3692 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3693 b->end = ((STDCHAR *) m->mptr) + len;
3694 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3703 PerlIOBase(f)->flags =
3704 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3706 b->ptr = b->end = b->ptr;
3715 PerlIOMmap_unmap(PerlIO *f)
3717 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3718 PerlIOBuf *b = &m->base;
3722 code = munmap(m->mptr, m->len);
3726 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3729 b->ptr = b->end = b->buf;
3730 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3736 PerlIOMmap_get_base(PerlIO *f)
3738 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3739 PerlIOBuf *b = &m->base;
3740 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3742 * Already have a readbuffer in progress
3748 * We have a write buffer or flushed PerlIOBuf read buffer
3750 m->bbuf = b->buf; /* save it in case we need it again */
3751 b->buf = NULL; /* Clear to trigger below */
3754 PerlIOMmap_map(f); /* Try and map it */
3757 * Map did not work - recover PerlIOBuf buffer if we have one
3762 b->ptr = b->end = b->buf;
3765 return PerlIOBuf_get_base(f);
3769 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3771 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3772 PerlIOBuf *b = &m->base;
3773 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3775 if (b->ptr && (b->ptr - count) >= b->buf
3776 && memEQ(b->ptr - count, vbuf, count)) {
3778 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3783 * Loose the unwritable mapped buffer
3787 * If flush took the "buffer" see if we have one from before
3789 if (!b->buf && m->bbuf)
3792 PerlIOBuf_get_base(f);
3796 return PerlIOBuf_unread(f, vbuf, count);
3800 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3802 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3803 PerlIOBuf *b = &m->base;
3804 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3806 * No, or wrong sort of, buffer
3809 if (PerlIOMmap_unmap(f) != 0)
3813 * If unmap took the "buffer" see if we have one from before
3815 if (!b->buf && m->bbuf)
3818 PerlIOBuf_get_base(f);
3822 return PerlIOBuf_write(f, vbuf, count);
3826 PerlIOMmap_flush(PerlIO *f)
3828 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3829 PerlIOBuf *b = &m->base;
3830 IV code = PerlIOBuf_flush(f);
3832 * Now we are "synced" at PerlIOBuf level
3839 if (PerlIOMmap_unmap(f) != 0)
3844 * We seem to have a PerlIOBuf buffer which was not mapped
3845 * remember it in case we need one later
3854 PerlIOMmap_fill(PerlIO *f)
3856 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3857 IV code = PerlIO_flush(f);
3858 if (code == 0 && !b->buf) {
3859 code = PerlIOMmap_map(f);
3861 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3862 code = PerlIOBuf_fill(f);
3868 PerlIOMmap_close(PerlIO *f)
3870 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3871 PerlIOBuf *b = &m->base;
3872 IV code = PerlIO_flush(f);
3876 b->ptr = b->end = b->buf;
3878 if (PerlIOBuf_close(f) != 0)
3884 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3886 return PerlIOBase_dup(aTHX_ f, o, param);
3890 PerlIO_funcs PerlIO_mmap = {
3910 PerlIOBase_clearerr,
3911 PerlIOBase_setlinebuf,
3912 PerlIOMmap_get_base,
3916 PerlIOBuf_set_ptrcnt,
3919 #endif /* HAS_MMAP */
3924 /* Place holder for stdstreams call ??? */
3933 PerlIO_stdstreams(aTHX);
3935 return &PL_perlio[1];
3938 #undef PerlIO_stdout
3944 PerlIO_stdstreams(aTHX);
3946 return &PL_perlio[2];
3949 #undef PerlIO_stderr
3955 PerlIO_stdstreams(aTHX);
3957 return &PL_perlio[3];
3960 /*--------------------------------------------------------------------------------------*/
3962 #undef PerlIO_getname
3964 PerlIO_getname(PerlIO *f, char *buf)
3969 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3971 name = fgetname(stdio, buf);
3973 Perl_croak(aTHX_ "Don't know how to get file name");
3979 /*--------------------------------------------------------------------------------------*/
3981 * Functions which can be called on any kind of PerlIO implemented in
3987 PerlIO_getc(PerlIO *f)
3990 SSize_t count = PerlIO_read(f, buf, 1);
3992 return (unsigned char) buf[0];
3997 #undef PerlIO_ungetc
3999 PerlIO_ungetc(PerlIO *f, int ch)
4003 if (PerlIO_unread(f, &buf, 1) == 1)
4011 PerlIO_putc(PerlIO *f, int ch)
4014 return PerlIO_write(f, &buf, 1);
4019 PerlIO_puts(PerlIO *f, const char *s)
4021 STRLEN len = strlen(s);
4022 return PerlIO_write(f, s, len);
4025 #undef PerlIO_rewind
4027 PerlIO_rewind(PerlIO *f)
4029 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4033 #undef PerlIO_vprintf
4035 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4038 SV *sv = newSVpvn("", 0);
4044 Perl_va_copy(ap, apc);
4045 sv_vcatpvf(sv, fmt, &apc);
4047 sv_vcatpvf(sv, fmt, &ap);
4050 wrote = PerlIO_write(f, s, len);
4055 #undef PerlIO_printf
4057 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4062 result = PerlIO_vprintf(f, fmt, ap);
4067 #undef PerlIO_stdoutf
4069 PerlIO_stdoutf(const char *fmt, ...)
4074 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4079 #undef PerlIO_tmpfile
4081 PerlIO_tmpfile(void)
4084 * I have no idea how portable mkstemp() is ...
4086 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4089 FILE *stdio = PerlSIO_tmpfile();
4092 PerlIOSelf(PerlIO_push
4093 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4094 "w+", Nullsv), PerlIOStdio);
4100 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4101 int fd = mkstemp(SvPVX(sv));
4104 f = PerlIO_fdopen(fd, "w+");
4106 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4108 PerlLIO_unlink(SvPVX(sv));
4118 #endif /* USE_SFIO */
4119 #endif /* PERLIO_IS_STDIO */
4121 /*======================================================================================*/
4123 * Now some functions in terms of above which may be needed even if we are
4124 * not in true PerlIO mode
4128 #undef PerlIO_setpos
4130 PerlIO_setpos(PerlIO *f, SV *pos)
4135 Off_t *posn = (Off_t *) SvPV(pos, len);
4136 if (f && len == sizeof(Off_t))
4137 return PerlIO_seek(f, *posn, SEEK_SET);
4139 SETERRNO(EINVAL, SS$_IVCHAN);
4143 #undef PerlIO_setpos
4145 PerlIO_setpos(PerlIO *f, SV *pos)
4150 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4151 if (f && len == sizeof(Fpos_t)) {
4152 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4153 return fsetpos64(f, fpos);
4155 return fsetpos(f, fpos);
4159 SETERRNO(EINVAL, SS$_IVCHAN);
4165 #undef PerlIO_getpos
4167 PerlIO_getpos(PerlIO *f, SV *pos)
4170 Off_t posn = PerlIO_tell(f);
4171 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4172 return (posn == (Off_t) - 1) ? -1 : 0;
4175 #undef PerlIO_getpos
4177 PerlIO_getpos(PerlIO *f, SV *pos)
4182 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4183 code = fgetpos64(f, &fpos);
4185 code = fgetpos(f, &fpos);
4187 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4192 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4195 vprintf(char *pat, char *args)
4197 _doprnt(pat, args, stdout);
4198 return 0; /* wrong, but perl doesn't use the return
4203 vfprintf(FILE *fd, char *pat, char *args)
4205 _doprnt(pat, args, fd);
4206 return 0; /* wrong, but perl doesn't use the return
4212 #ifndef PerlIO_vsprintf
4214 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4216 int val = vsprintf(s, fmt, ap);
4218 if (strlen(s) >= (STRLEN) n) {
4220 (void) PerlIO_puts(Perl_error_log,
4221 "panic: sprintf overflow - memory corrupted!\n");
4229 #ifndef PerlIO_sprintf
4231 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4236 result = PerlIO_vsprintf(s, n, fmt, ap);