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 (void) fp_dup(f, 0, param);
555 PerlIO_destruct(pTHX)
557 PerlIO **table = &PL_perlio;
559 while ((f = *table)) {
561 table = (PerlIO **) (f++);
562 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
566 if (l->tab->kind & PERLIO_K_DESTRUCT) {
567 PerlIO_debug("Destruct popping %s\n", l->tab->name);
578 PerlIO_list_free(aTHX_ PL_known_layers);
579 PL_known_layers = NULL;
580 PerlIO_list_free(aTHX_ PL_def_layerlist);
581 PL_def_layerlist = NULL;
585 PerlIO_pop(pTHX_ PerlIO *f)
589 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
590 if (l->tab->Popped) {
592 * If popped returns non-zero do not free its layer structure
593 * it has either done so itself, or it is shared and still in
596 if ((*l->tab->Popped) (f) != 0)
604 /*--------------------------------------------------------------------------------------*/
606 * XS Interface for perl code
610 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
613 if ((SSize_t) len <= 0)
615 for (i = 0; i < PL_known_layers->cur; i++) {
616 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
617 if (memEQ(f->name, name, len)) {
618 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
622 if (load && PL_subname && PL_def_layerlist
623 && PL_def_layerlist->cur >= 2) {
624 SV *pkgsv = newSVpvn("PerlIO", 6);
625 SV *layer = newSVpvn(name, len);
628 * The two SVs are magically freed by load_module
630 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
632 return PerlIO_find_layer(aTHX_ name, len, 0);
634 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
638 #ifdef USE_ATTRIBUTES_FOR_PERLIO
641 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
644 IO *io = GvIOn((GV *) SvRV(sv));
645 PerlIO *ifp = IoIFP(io);
646 PerlIO *ofp = IoOFP(io);
647 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
653 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
656 IO *io = GvIOn((GV *) SvRV(sv));
657 PerlIO *ifp = IoIFP(io);
658 PerlIO *ofp = IoOFP(io);
659 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
665 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
667 Perl_warn(aTHX_ "clear %" SVf, sv);
672 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
674 Perl_warn(aTHX_ "free %" SVf, sv);
678 MGVTBL perlio_vtab = {
686 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
689 SV *sv = SvRV(ST(1));
694 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
696 mg = mg_find(sv, PERL_MAGIC_ext);
697 mg->mg_virtual = &perlio_vtab;
699 Perl_warn(aTHX_ "attrib %" SVf, sv);
700 for (i = 2; i < items; i++) {
702 const char *name = SvPV(ST(i), len);
703 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
705 av_push(av, SvREFCNT_inc(layer));
716 #endif /* USE_ATTIBUTES_FOR_PERLIO */
719 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
721 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
722 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
726 XS(XS_PerlIO__Layer__find)
730 Perl_croak(aTHX_ "Usage class->find(name[,load])");
733 char *name = SvPV(ST(1), len);
734 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
735 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
737 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
744 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
746 if (!PL_known_layers)
747 PL_known_layers = PerlIO_list_alloc(aTHX);
748 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
749 PerlIO_debug("define %s %p\n", tab->name, tab);
753 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
756 const char *s = names;
758 while (isSPACE(*s) || *s == ':')
763 const char *as = Nullch;
765 if (!isIDFIRST(*s)) {
767 * Message is consistent with how attribute lists are
768 * passed. Even though this means "foo : : bar" is
769 * seen as an invalid separator character.
771 char q = ((*s == '\'') ? '"' : '\'');
773 "perlio: invalid separator character %c%c%c in layer specification list",
779 } while (isALNUM(*e));
795 * It's a nul terminated string, not allowed
796 * to \ the terminating null. Anything other
797 * character is passed over.
808 "perlio: argument list not closed for layer \"%.*s\"",
820 PerlIO_funcs *layer =
821 PerlIO_find_layer(aTHX_ s, llen, 1);
823 PerlIO_list_push(aTHX_ av, layer,
829 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
842 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
844 PerlIO_funcs *tab = &PerlIO_perlio;
845 if (O_BINARY != O_TEXT) {
849 if (PerlIO_stdio.Set_ptrcnt) {
853 PerlIO_debug("Pushing %s\n", tab->name);
854 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
859 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
861 return av->array[n].arg;
865 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
867 if (n >= 0 && n < av->cur) {
868 PerlIO_debug("Layer %" IVdf " is %s\n", n,
869 av->array[n].funcs->name);
870 return av->array[n].funcs;
873 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
878 PerlIO_default_layers(pTHX)
880 if (!PL_def_layerlist) {
881 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
882 PerlIO_funcs *osLayer = &PerlIO_unix;
883 PL_def_layerlist = PerlIO_list_alloc(aTHX);
884 PerlIO_define_layer(aTHX_ & PerlIO_unix);
885 #if defined(WIN32) && !defined(UNDER_CE)
886 PerlIO_define_layer(aTHX_ & PerlIO_win32);
888 osLayer = &PerlIO_win32;
891 PerlIO_define_layer(aTHX_ & PerlIO_raw);
892 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
893 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
894 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
896 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
898 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
899 PerlIO_define_layer(aTHX_ & PerlIO_byte);
900 PerlIO_list_push(aTHX_ PL_def_layerlist,
901 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
904 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
907 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
910 if (PL_def_layerlist->cur < 2) {
911 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
913 return PL_def_layerlist;
917 Perl_boot_core_PerlIO(pTHX)
919 #ifdef USE_ATTRIBUTES_FOR_PERLIO
920 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
923 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
927 PerlIO_default_layer(pTHX_ I32 n)
929 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
932 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
935 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
936 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
939 PerlIO_stdstreams(pTHX)
942 PerlIO_allocate(aTHX);
943 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
944 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
945 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
950 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
953 Newc('L',l,tab->size,char,PerlIOl);
955 Zero(l, tab->size, char);
959 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
960 (mode) ? mode : "(Null)", arg);
961 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
970 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
983 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
986 * Remove the dummy layer
991 * Pop back to bottom layer
995 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
996 if (*PerlIONext(f)) {
1001 * Nothing bellow - push unix on top then remove it
1003 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1004 PerlIO_pop(aTHX_ PerlIONext(f));
1009 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1016 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1017 PerlIO_list_t *layers, IV n)
1019 IV max = layers->cur;
1022 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1024 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1035 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1039 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1040 code = PerlIO_parse_layers(aTHX_ layers, names);
1042 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1044 PerlIO_list_free(aTHX_ layers);
1050 /*--------------------------------------------------------------------------------------*/
1052 * Given the abstraction above the public API functions
1056 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1058 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1059 f, PerlIOBase(f)->tab->name, iotype, mode,
1060 (names) ? names : "(Null)");
1062 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1065 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1066 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1069 top = PerlIONext(top);
1073 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1076 #undef PerlIO__close
1078 PerlIO__close(PerlIO *f)
1081 return (*PerlIOBase(f)->tab->Close) (f);
1083 SETERRNO(EBADF, SS$_IVCHAN);
1090 PerlIO_close(PerlIO *f)
1095 code = (*PerlIOBase(f)->tab->Close) (f);
1097 PerlIO_pop(aTHX_ f);
1103 #undef PerlIO_fileno
1105 PerlIO_fileno(PerlIO *f)
1108 return (*PerlIOBase(f)->tab->Fileno) (f);
1110 SETERRNO(EBADF, SS$_IVCHAN);
1116 PerlIO_context_layers(pTHX_ const char *mode)
1118 const char *type = NULL;
1120 * Need to supply default layer info from open.pm
1123 SV *layers = PL_curcop->cop_io;
1126 type = SvPV(layers, len);
1127 if (type && mode[0] != 'r') {
1129 * Skip to write part
1131 const char *s = strchr(type, 0);
1132 if (s && (s - type) < len) {
1141 static PerlIO_funcs *
1142 PerlIO_layer_from_ref(pTHX_ SV *sv)
1145 * For any scalar type load the handler which is bundled with perl
1147 if (SvTYPE(sv) < SVt_PVAV)
1148 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1151 * For other types allow if layer is known but don't try and load it
1153 switch (SvTYPE(sv)) {
1155 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1157 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1159 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1161 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1167 PerlIO_resolve_layers(pTHX_ const char *layers,
1168 const char *mode, int narg, SV **args)
1170 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1173 PerlIO_stdstreams(aTHX);
1177 * If it is a reference but not an object see if we have a handler
1180 if (SvROK(arg) && !sv_isobject(arg)) {
1181 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1183 def = PerlIO_list_alloc(aTHX);
1184 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1188 * Don't fail if handler cannot be found :Via(...) etc. may do
1189 * something sensible else we will just stringfy and open
1195 layers = PerlIO_context_layers(aTHX_ mode);
1196 if (layers && *layers) {
1200 av = PerlIO_list_alloc(aTHX);
1201 for (i = 0; i < def->cur; i++) {
1202 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1209 PerlIO_parse_layers(aTHX_ av, layers);
1220 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1221 int imode, int perm, PerlIO *f, int narg, SV **args)
1223 if (!f && narg == 1 && *args == &PL_sv_undef) {
1224 if ((f = PerlIO_tmpfile())) {
1226 layers = PerlIO_context_layers(aTHX_ mode);
1227 if (layers && *layers)
1228 PerlIO_apply_layers(aTHX_ f, mode, layers);
1232 PerlIO_list_t *layera = NULL;
1234 PerlIO_funcs *tab = NULL;
1237 * This is "reopen" - it is not tested as perl does not use it
1241 layera = PerlIO_list_alloc(aTHX);
1244 (l->tab->Getarg) ? (*l->tab->
1245 Getarg) (&l) : &PL_sv_undef;
1246 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1247 l = *PerlIONext(&l);
1251 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1254 * Start at "top" of layer stack
1256 n = layera->cur - 1;
1258 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1267 * Found that layer 'n' can do opens - call it
1269 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1270 tab->name, layers, mode, fd, imode, perm, f, narg,
1272 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1275 if (n + 1 < layera->cur) {
1277 * More layers above the one that we used to open -
1280 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1287 PerlIO_list_free(aTHX_ layera);
1293 #undef PerlIO_fdopen
1295 PerlIO_fdopen(int fd, const char *mode)
1298 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1303 PerlIO_open(const char *path, const char *mode)
1306 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1307 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1310 #undef PerlIO_reopen
1312 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1315 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1316 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1321 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1324 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1326 SETERRNO(EBADF, SS$_IVCHAN);
1331 #undef PerlIO_unread
1333 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1336 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1338 SETERRNO(EBADF, SS$_IVCHAN);
1345 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1348 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1350 SETERRNO(EBADF, SS$_IVCHAN);
1357 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1360 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1362 SETERRNO(EBADF, SS$_IVCHAN);
1369 PerlIO_tell(PerlIO *f)
1372 return (*PerlIOBase(f)->tab->Tell) (f);
1374 SETERRNO(EBADF, SS$_IVCHAN);
1381 PerlIO_flush(PerlIO *f)
1385 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1386 if (tab && tab->Flush) {
1387 return (*tab->Flush) (f);
1390 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1391 SETERRNO(EBADF, SS$_IVCHAN);
1396 PerlIO_debug("Cannot flush f=%p\n", f);
1397 SETERRNO(EBADF, SS$_IVCHAN);
1403 * Is it good API design to do flush-all on NULL, a potentially
1404 * errorneous input? Maybe some magical value (PerlIO*
1405 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1406 * things on fflush(NULL), but should we be bound by their design
1410 PerlIO **table = &PL_perlio;
1412 while ((f = *table)) {
1414 table = (PerlIO **) (f++);
1415 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1416 if (*f && PerlIO_flush(f) != 0)
1426 PerlIOBase_flush_linebuf()
1429 PerlIO **table = &PL_perlio;
1431 while ((f = *table)) {
1433 table = (PerlIO **) (f++);
1434 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1437 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1438 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1447 PerlIO_fill(PerlIO *f)
1450 return (*PerlIOBase(f)->tab->Fill) (f);
1452 SETERRNO(EBADF, SS$_IVCHAN);
1457 #undef PerlIO_isutf8
1459 PerlIO_isutf8(PerlIO *f)
1462 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1464 SETERRNO(EBADF, SS$_IVCHAN);
1471 PerlIO_eof(PerlIO *f)
1474 return (*PerlIOBase(f)->tab->Eof) (f);
1476 SETERRNO(EBADF, SS$_IVCHAN);
1483 PerlIO_error(PerlIO *f)
1486 return (*PerlIOBase(f)->tab->Error) (f);
1488 SETERRNO(EBADF, SS$_IVCHAN);
1493 #undef PerlIO_clearerr
1495 PerlIO_clearerr(PerlIO *f)
1498 (*PerlIOBase(f)->tab->Clearerr) (f);
1500 SETERRNO(EBADF, SS$_IVCHAN);
1503 #undef PerlIO_setlinebuf
1505 PerlIO_setlinebuf(PerlIO *f)
1508 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1510 SETERRNO(EBADF, SS$_IVCHAN);
1513 #undef PerlIO_has_base
1515 PerlIO_has_base(PerlIO *f)
1518 return (PerlIOBase(f)->tab->Get_base != NULL);
1523 #undef PerlIO_fast_gets
1525 PerlIO_fast_gets(PerlIO *f)
1527 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1528 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1529 return (tab->Set_ptrcnt != NULL);
1534 #undef PerlIO_has_cntptr
1536 PerlIO_has_cntptr(PerlIO *f)
1539 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1540 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1545 #undef PerlIO_canset_cnt
1547 PerlIO_canset_cnt(PerlIO *f)
1550 PerlIOl *l = PerlIOBase(f);
1551 return (l->tab->Set_ptrcnt != NULL);
1556 #undef PerlIO_get_base
1558 PerlIO_get_base(PerlIO *f)
1561 return (*PerlIOBase(f)->tab->Get_base) (f);
1565 #undef PerlIO_get_bufsiz
1567 PerlIO_get_bufsiz(PerlIO *f)
1570 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1574 #undef PerlIO_get_ptr
1576 PerlIO_get_ptr(PerlIO *f)
1578 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1579 if (tab->Get_ptr == NULL)
1581 return (*tab->Get_ptr) (f);
1584 #undef PerlIO_get_cnt
1586 PerlIO_get_cnt(PerlIO *f)
1588 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1589 if (tab->Get_cnt == NULL)
1591 return (*tab->Get_cnt) (f);
1594 #undef PerlIO_set_cnt
1596 PerlIO_set_cnt(PerlIO *f, int cnt)
1598 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1601 #undef PerlIO_set_ptrcnt
1603 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1605 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1606 if (tab->Set_ptrcnt == NULL) {
1608 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1610 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1613 /*--------------------------------------------------------------------------------------*/
1615 * utf8 and raw dummy layers
1619 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1621 if (PerlIONext(f)) {
1623 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1624 PerlIO_pop(aTHX_ f);
1625 if (tab->kind & PERLIO_K_UTF8)
1626 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1628 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1634 PerlIO_funcs PerlIO_utf8 = {
1637 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1655 NULL, /* get_base */
1656 NULL, /* get_bufsiz */
1659 NULL, /* set_ptrcnt */
1662 PerlIO_funcs PerlIO_byte = {
1683 NULL, /* get_base */
1684 NULL, /* get_bufsiz */
1687 NULL, /* set_ptrcnt */
1691 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1692 IV n, const char *mode, int fd, int imode, int perm,
1693 PerlIO *old, int narg, SV **args)
1695 PerlIO_funcs *tab = PerlIO_default_btm();
1696 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1700 PerlIO_funcs PerlIO_raw = {
1721 NULL, /* get_base */
1722 NULL, /* get_bufsiz */
1725 NULL, /* set_ptrcnt */
1727 /*--------------------------------------------------------------------------------------*/
1728 /*--------------------------------------------------------------------------------------*/
1730 * "Methods" of the "base class"
1734 PerlIOBase_fileno(PerlIO *f)
1736 return PerlIO_fileno(PerlIONext(f));
1740 PerlIO_modestr(PerlIO *f, char *buf)
1743 IV flags = PerlIOBase(f)->flags;
1744 if (flags & PERLIO_F_APPEND) {
1746 if (flags & PERLIO_F_CANREAD) {
1750 else if (flags & PERLIO_F_CANREAD) {
1752 if (flags & PERLIO_F_CANWRITE)
1755 else if (flags & PERLIO_F_CANWRITE) {
1757 if (flags & PERLIO_F_CANREAD) {
1761 #if O_TEXT != O_BINARY
1762 if (!(flags & PERLIO_F_CRLF))
1770 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1772 PerlIOl *l = PerlIOBase(f);
1774 const char *omode = mode;
1777 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1778 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1779 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1780 if (tab->Set_ptrcnt != NULL)
1781 l->flags |= PERLIO_F_FASTGETS;
1783 if (*mode == '#' || *mode == 'I')
1787 l->flags |= PERLIO_F_CANREAD;
1790 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1793 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1796 SETERRNO(EINVAL, LIB$_INVARG);
1802 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1805 l->flags &= ~PERLIO_F_CRLF;
1808 l->flags |= PERLIO_F_CRLF;
1811 SETERRNO(EINVAL, LIB$_INVARG);
1818 l->flags |= l->next->flags &
1819 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1824 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1825 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1826 l->flags, PerlIO_modestr(f, temp));
1832 PerlIOBase_popped(PerlIO *f)
1838 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1842 * Save the position as current head considers it
1844 Off_t old = PerlIO_tell(f);
1846 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1847 PerlIOSelf(f, PerlIOBuf)->posn = old;
1848 done = PerlIOBuf_unread(f, vbuf, count);
1853 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1855 STDCHAR *buf = (STDCHAR *) vbuf;
1857 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1860 SSize_t avail = PerlIO_get_cnt(f);
1863 take = (count < avail) ? count : avail;
1865 STDCHAR *ptr = PerlIO_get_ptr(f);
1866 Copy(ptr, buf, take, STDCHAR);
1867 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1871 if (count > 0 && avail <= 0) {
1872 if (PerlIO_fill(f) != 0)
1876 return (buf - (STDCHAR *) vbuf);
1882 PerlIOBase_noop_ok(PerlIO *f)
1888 PerlIOBase_noop_fail(PerlIO *f)
1894 PerlIOBase_close(PerlIO *f)
1897 PerlIO *n = PerlIONext(f);
1898 if (PerlIO_flush(f) != 0)
1900 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1902 PerlIOBase(f)->flags &=
1903 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1908 PerlIOBase_eof(PerlIO *f)
1911 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1917 PerlIOBase_error(PerlIO *f)
1920 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1926 PerlIOBase_clearerr(PerlIO *f)
1929 PerlIO *n = PerlIONext(f);
1930 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1937 PerlIOBase_setlinebuf(PerlIO *f)
1940 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1945 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1951 return sv_dup(arg, param);
1954 return newSVsv(arg);
1957 return newSVsv(arg);
1962 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1964 PerlIO *nexto = PerlIONext(o);
1966 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1967 f = (*tab->Dup)(aTHX_ f, nexto, param);
1970 PerlIO_funcs *self = PerlIOBase(o)->tab;
1973 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1975 arg = (*self->Getarg)(o);
1977 arg = PerlIO_sv_dup(aTHX_ arg, param);
1980 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1988 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1990 perl_mutex PerlIO_mutex;
1992 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
1997 /* Place holder for stdstreams call ??? */
1999 MUTEX_INIT(&PerlIO_mutex);
2004 PerlIOUnix_refcnt_inc(int fd)
2006 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2008 MUTEX_LOCK(&PerlIO_mutex);
2010 PerlIO_fd_refcnt[fd]++;
2011 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2013 MUTEX_UNLOCK(&PerlIO_mutex);
2019 PerlIO_cleanup(pTHX)
2021 PerlIOUnix_refcnt_inc(0);
2022 PerlIOUnix_refcnt_inc(1);
2023 PerlIOUnix_refcnt_inc(2);
2024 PerlIO_cleantable(aTHX_ &PL_perlio);
2028 PerlIOUnix_refcnt_dec(int fd)
2031 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2033 MUTEX_LOCK(&PerlIO_mutex);
2035 cnt = --PerlIO_fd_refcnt[fd];
2036 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2038 MUTEX_UNLOCK(&PerlIO_mutex);
2044 /*--------------------------------------------------------------------------------------*/
2046 * Bottom-most level for UNIX-like case
2050 struct _PerlIO base; /* The generic part */
2051 int fd; /* UNIX like file descriptor */
2052 int oflags; /* open/fcntl flags */
2056 PerlIOUnix_oflags(const char *mode)
2059 if (*mode == 'I' || *mode == '#')
2064 if (*++mode == '+') {
2071 oflags = O_CREAT | O_TRUNC;
2072 if (*++mode == '+') {
2081 oflags = O_CREAT | O_APPEND;
2082 if (*++mode == '+') {
2095 else if (*mode == 't') {
2097 oflags &= ~O_BINARY;
2101 * Always open in binary mode
2104 if (*mode || oflags == -1) {
2105 SETERRNO(EINVAL, LIB$_INVARG);
2112 PerlIOUnix_fileno(PerlIO *f)
2114 return PerlIOSelf(f, PerlIOUnix)->fd;
2118 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
2120 IV code = PerlIOBase_pushed(f, mode, arg);
2121 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2122 if (*PerlIONext(f)) {
2123 s->fd = PerlIO_fileno(PerlIONext(f));
2125 * XXX could (or should) we retrieve the oflags from the open file
2126 * handle rather than believing the "mode" we are passed in? XXX
2127 * Should the value on NULL mode be 0 or -1?
2129 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2131 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2136 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2137 IV n, const char *mode, int fd, int imode,
2138 int perm, PerlIO *f, int narg, SV **args)
2141 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2142 (*PerlIOBase(f)->tab->Close) (f);
2145 char *path = SvPV_nolen(*args);
2149 imode = PerlIOUnix_oflags(mode);
2153 fd = PerlLIO_open3(path, imode, perm);
2161 f = PerlIO_allocate(aTHX);
2162 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2166 s = PerlIOSelf(f, PerlIOUnix);
2169 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2170 PerlIOUnix_refcnt_inc(fd);
2176 * FIXME: pop layers ???
2184 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2186 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2188 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2189 f = PerlIOBase_dup(aTHX_ f, o, param);
2191 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2192 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2194 PerlIOUnix_refcnt_inc(fd);
2203 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2206 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2207 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2210 SSize_t len = PerlLIO_read(fd, vbuf, count);
2211 if (len >= 0 || errno != EINTR) {
2213 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2214 else if (len == 0 && count != 0)
2215 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2223 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2226 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2228 SSize_t len = PerlLIO_write(fd, vbuf, count);
2229 if (len >= 0 || errno != EINTR) {
2231 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2239 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2243 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2244 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2245 return (new == (Off_t) - 1) ? -1 : 0;
2249 PerlIOUnix_tell(PerlIO *f)
2252 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2257 PerlIOUnix_close(PerlIO *f)
2260 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2262 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2263 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2264 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2269 SETERRNO(EBADF,SS$_IVCHAN);
2272 while (PerlLIO_close(fd) != 0) {
2273 if (errno != EINTR) {
2280 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2285 PerlIO_funcs PerlIO_unix = {
2301 PerlIOBase_noop_ok, /* flush */
2302 PerlIOBase_noop_fail, /* fill */
2305 PerlIOBase_clearerr,
2306 PerlIOBase_setlinebuf,
2307 NULL, /* get_base */
2308 NULL, /* get_bufsiz */
2311 NULL, /* set_ptrcnt */
2314 /*--------------------------------------------------------------------------------------*/
2320 struct _PerlIO base;
2321 FILE *stdio; /* The stream */
2325 PerlIOStdio_fileno(PerlIO *f)
2328 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2332 PerlIOStdio_mode(const char *mode, char *tmode)
2338 if (O_BINARY != O_TEXT) {
2346 * This isn't used yet ...
2349 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2351 if (*PerlIONext(f)) {
2353 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2356 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2357 PerlIOStdio_mode(mode, tmode));
2363 return PerlIOBase_pushed(f, mode, arg);
2366 #undef PerlIO_importFILE
2368 PerlIO_importFILE(FILE *stdio, int fl)
2374 PerlIOSelf(PerlIO_push
2375 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2376 "r+", Nullsv), PerlIOStdio);
2383 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2384 IV n, const char *mode, int fd, int imode,
2385 int perm, PerlIO *f, int narg, SV **args)
2389 char *path = SvPV_nolen(*args);
2390 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2392 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2393 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2398 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2403 char *path = SvPV_nolen(*args);
2406 fd = PerlLIO_open3(path, imode, perm);
2409 FILE *stdio = PerlSIO_fopen(path, mode);
2412 PerlIOSelf(PerlIO_push
2413 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2414 (mode = PerlIOStdio_mode(mode, tmode)),
2418 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2433 stdio = PerlSIO_stdin;
2436 stdio = PerlSIO_stdout;
2439 stdio = PerlSIO_stderr;
2444 stdio = PerlSIO_fdopen(fd, mode =
2445 PerlIOStdio_mode(mode, tmode));
2449 PerlIOSelf(PerlIO_push
2450 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2451 mode, PerlIOArg), PerlIOStdio);
2453 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2462 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2464 /* This assumes no layers underneath - which is what
2465 happens, but is not how I remember it. NI-S 2001/10/16
2467 int fd = PerlIO_fileno(o);
2470 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2472 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2473 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2474 PerlIOUnix_refcnt_inc(fd);
2477 PerlSIO_fclose(stdio);
2489 PerlIOStdio_close(PerlIO *f)
2492 #ifdef SOCKS5_VERSION_NAME
2494 Sock_size_t optlen = sizeof(int);
2496 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2497 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2501 #ifdef SOCKS5_VERSION_NAME
2503 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2505 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2507 PerlSIO_fclose(stdio)
2516 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2519 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2522 STDCHAR *buf = (STDCHAR *) vbuf;
2524 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2525 * stdio does not do that for fread()
2527 int ch = PerlSIO_fgetc(s);
2534 got = PerlSIO_fread(vbuf, 1, count, s);
2539 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2542 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2543 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2546 int ch = *buf-- & 0xff;
2547 if (PerlSIO_ungetc(ch, s) != ch)
2556 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2559 return PerlSIO_fwrite(vbuf, 1, count,
2560 PerlIOSelf(f, PerlIOStdio)->stdio);
2564 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2567 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2568 return PerlSIO_fseek(stdio, offset, whence);
2572 PerlIOStdio_tell(PerlIO *f)
2575 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2576 return PerlSIO_ftell(stdio);
2580 PerlIOStdio_flush(PerlIO *f)
2583 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2584 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2585 return PerlSIO_fflush(stdio);
2590 * FIXME: This discards ungetc() and pre-read stuff which is not
2591 * right if this is just a "sync" from a layer above Suspect right
2592 * design is to do _this_ but not have layer above flush this
2593 * layer read-to-read
2596 * Not writeable - sync by attempting a seek
2599 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2607 PerlIOStdio_fill(PerlIO *f)
2610 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2613 * fflush()ing read-only streams can cause trouble on some stdio-s
2615 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2616 if (PerlSIO_fflush(stdio) != 0)
2619 c = PerlSIO_fgetc(stdio);
2620 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2626 PerlIOStdio_eof(PerlIO *f)
2629 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2633 PerlIOStdio_error(PerlIO *f)
2636 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2640 PerlIOStdio_clearerr(PerlIO *f)
2643 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2647 PerlIOStdio_setlinebuf(PerlIO *f)
2650 #ifdef HAS_SETLINEBUF
2651 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2653 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2659 PerlIOStdio_get_base(PerlIO *f)
2662 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2663 return PerlSIO_get_base(stdio);
2667 PerlIOStdio_get_bufsiz(PerlIO *f)
2670 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2671 return PerlSIO_get_bufsiz(stdio);
2675 #ifdef USE_STDIO_PTR
2677 PerlIOStdio_get_ptr(PerlIO *f)
2680 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2681 return PerlSIO_get_ptr(stdio);
2685 PerlIOStdio_get_cnt(PerlIO *f)
2688 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2689 return PerlSIO_get_cnt(stdio);
2693 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2695 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2698 #ifdef STDIO_PTR_LVALUE
2699 PerlSIO_set_ptr(stdio, ptr);
2700 #ifdef STDIO_PTR_LVAL_SETS_CNT
2701 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2703 assert(PerlSIO_get_cnt(stdio) == (cnt));
2706 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2708 * Setting ptr _does_ change cnt - we are done
2712 #else /* STDIO_PTR_LVALUE */
2714 #endif /* STDIO_PTR_LVALUE */
2717 * Now (or only) set cnt
2719 #ifdef STDIO_CNT_LVALUE
2720 PerlSIO_set_cnt(stdio, cnt);
2721 #else /* STDIO_CNT_LVALUE */
2722 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2723 PerlSIO_set_ptr(stdio,
2724 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2726 #else /* STDIO_PTR_LVAL_SETS_CNT */
2728 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2729 #endif /* STDIO_CNT_LVALUE */
2734 PerlIO_funcs PerlIO_stdio = {
2736 sizeof(PerlIOStdio),
2754 PerlIOStdio_clearerr,
2755 PerlIOStdio_setlinebuf,
2757 PerlIOStdio_get_base,
2758 PerlIOStdio_get_bufsiz,
2763 #ifdef USE_STDIO_PTR
2764 PerlIOStdio_get_ptr,
2765 PerlIOStdio_get_cnt,
2766 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2767 PerlIOStdio_set_ptrcnt
2768 #else /* STDIO_PTR_LVALUE */
2770 #endif /* STDIO_PTR_LVALUE */
2771 #else /* USE_STDIO_PTR */
2775 #endif /* USE_STDIO_PTR */
2778 #undef PerlIO_exportFILE
2780 PerlIO_exportFILE(PerlIO *f, int fl)
2784 stdio = fdopen(PerlIO_fileno(f), "r+");
2788 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2795 #undef PerlIO_findFILE
2797 PerlIO_findFILE(PerlIO *f)
2801 if (l->tab == &PerlIO_stdio) {
2802 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2805 l = *PerlIONext(&l);
2807 return PerlIO_exportFILE(f, 0);
2810 #undef PerlIO_releaseFILE
2812 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2816 /*--------------------------------------------------------------------------------------*/
2818 * perlio buffer layer
2822 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2825 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2826 int fd = PerlIO_fileno(f);
2828 if (fd >= 0 && PerlLIO_isatty(fd)) {
2829 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2831 posn = PerlIO_tell(PerlIONext(f));
2832 if (posn != (Off_t) - 1) {
2835 return PerlIOBase_pushed(f, mode, arg);
2839 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2840 IV n, const char *mode, int fd, int imode, int perm,
2841 PerlIO *f, int narg, SV **args)
2844 PerlIO *next = PerlIONext(f);
2846 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2848 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2851 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2857 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2865 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2868 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2869 fd = PerlIO_fileno(f);
2870 #if (O_BINARY != O_TEXT) && !defined(__BEOS__)
2872 * do something about failing setmode()? --jhi
2874 PerlLIO_setmode(fd, O_BINARY);
2876 if (init && fd == 2) {
2878 * Initial stderr is unbuffered
2880 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2888 * This "flush" is akin to sfio's sync in that it handles files in either
2889 * read or write state
2892 PerlIOBuf_flush(PerlIO *f)
2894 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2896 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2898 * write() the buffer
2900 STDCHAR *buf = b->buf;
2902 PerlIO *n = PerlIONext(f);
2903 while (p < b->ptr) {
2904 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2908 else if (count < 0 || PerlIO_error(n)) {
2909 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2914 b->posn += (p - buf);
2916 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2917 STDCHAR *buf = PerlIO_get_base(f);
2919 * Note position change
2921 b->posn += (b->ptr - buf);
2922 if (b->ptr < b->end) {
2924 * We did not consume all of it
2926 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2927 b->posn = PerlIO_tell(PerlIONext(f));
2931 b->ptr = b->end = b->buf;
2932 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2934 * FIXME: Is this right for read case ?
2936 if (PerlIO_flush(PerlIONext(f)) != 0)
2942 PerlIOBuf_fill(PerlIO *f)
2944 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2945 PerlIO *n = PerlIONext(f);
2948 * FIXME: doing the down-stream flush is a bad idea if it causes
2949 * pre-read data in stdio buffer to be discarded but this is too
2950 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2951 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2953 if (PerlIO_flush(f) != 0)
2955 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2956 PerlIOBase_flush_linebuf();
2959 PerlIO_get_base(f); /* allocate via vtable */
2961 b->ptr = b->end = b->buf;
2962 if (PerlIO_fast_gets(n)) {
2964 * Layer below is also buffered We do _NOT_ want to call its
2965 * ->Read() because that will loop till it gets what we asked for
2966 * which may hang on a pipe etc. Instead take anything it has to
2967 * hand, or ask it to fill _once_.
2969 avail = PerlIO_get_cnt(n);
2971 avail = PerlIO_fill(n);
2973 avail = PerlIO_get_cnt(n);
2975 if (!PerlIO_error(n) && PerlIO_eof(n))
2980 STDCHAR *ptr = PerlIO_get_ptr(n);
2981 SSize_t cnt = avail;
2982 if (avail > b->bufsiz)
2984 Copy(ptr, b->buf, avail, STDCHAR);
2985 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2989 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2993 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2995 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2998 b->end = b->buf + avail;
2999 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3004 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
3006 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3010 return PerlIOBase_read(f, vbuf, count);
3016 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
3018 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3019 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3022 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3027 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3029 * Buffer is already a read buffer, we can overwrite any chars
3030 * which have been read back to buffer start
3032 avail = (b->ptr - b->buf);
3036 * Buffer is idle, set it up so whole buffer is available for
3040 b->end = b->buf + avail;
3042 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3044 * Buffer extends _back_ from where we are now
3046 b->posn -= b->bufsiz;
3048 if (avail > (SSize_t) count) {
3050 * If we have space for more than count, just move count
3058 * In simple stdio-like ungetc() case chars will be already
3061 if (buf != b->ptr) {
3062 Copy(buf, b->ptr, avail, STDCHAR);
3066 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3073 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
3075 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3076 const STDCHAR *buf = (const STDCHAR *) vbuf;
3080 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3083 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3084 if ((SSize_t) count < avail)
3086 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3087 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3102 Copy(buf, b->ptr, avail, STDCHAR);
3109 if (b->ptr >= (b->buf + b->bufsiz))
3112 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3118 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3121 if ((code = PerlIO_flush(f)) == 0) {
3122 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3123 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3124 code = PerlIO_seek(PerlIONext(f), offset, whence);
3126 b->posn = PerlIO_tell(PerlIONext(f));
3133 PerlIOBuf_tell(PerlIO *f)
3135 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3137 * b->posn is file position where b->buf was read, or will be written
3139 Off_t posn = b->posn;
3142 * If buffer is valid adjust position by amount in buffer
3144 posn += (b->ptr - b->buf);
3150 PerlIOBuf_close(PerlIO *f)
3152 IV code = PerlIOBase_close(f);
3153 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3154 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3158 b->ptr = b->end = b->buf;
3159 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3164 PerlIOBuf_get_ptr(PerlIO *f)
3166 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3173 PerlIOBuf_get_cnt(PerlIO *f)
3175 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3178 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3179 return (b->end - b->ptr);
3184 PerlIOBuf_get_base(PerlIO *f)
3186 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3191 Newz('B',b->buf,b->bufsiz, STDCHAR);
3193 b->buf = (STDCHAR *) & b->oneword;
3194 b->bufsiz = sizeof(b->oneword);
3203 PerlIOBuf_bufsiz(PerlIO *f)
3205 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3208 return (b->end - b->buf);
3212 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3214 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3218 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3220 assert(PerlIO_get_cnt(f) == cnt);
3221 assert(b->ptr >= b->buf);
3223 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3227 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3229 return PerlIOBase_dup(aTHX_ f, o, param);
3234 PerlIO_funcs PerlIO_perlio = {
3254 PerlIOBase_clearerr,
3255 PerlIOBase_setlinebuf,
3260 PerlIOBuf_set_ptrcnt,
3263 /*--------------------------------------------------------------------------------------*/
3265 * Temp layer to hold unread chars when cannot do it any other way
3269 PerlIOPending_fill(PerlIO *f)
3272 * Should never happen
3279 PerlIOPending_close(PerlIO *f)
3282 * A tad tricky - flush pops us, then we close new top
3285 return PerlIO_close(f);
3289 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3292 * A tad tricky - flush pops us, then we seek new top
3295 return PerlIO_seek(f, offset, whence);
3300 PerlIOPending_flush(PerlIO *f)
3303 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3304 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3308 PerlIO_pop(aTHX_ f);
3313 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3319 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3324 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3326 IV code = PerlIOBase_pushed(f, mode, arg);
3327 PerlIOl *l = PerlIOBase(f);
3329 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3330 * etc. get muddled when it changes mid-string when we auto-pop.
3332 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3333 (PerlIOBase(PerlIONext(f))->
3334 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3339 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3341 SSize_t avail = PerlIO_get_cnt(f);
3346 got = PerlIOBuf_read(f, vbuf, avail);
3347 if (got >= 0 && got < count) {
3349 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3350 if (more >= 0 || got == 0)
3356 PerlIO_funcs PerlIO_pending = {
3360 PerlIOPending_pushed,
3371 PerlIOPending_close,
3372 PerlIOPending_flush,
3376 PerlIOBase_clearerr,
3377 PerlIOBase_setlinebuf,
3382 PerlIOPending_set_ptrcnt,
3387 /*--------------------------------------------------------------------------------------*/
3389 * crlf - translation On read translate CR,LF to "\n" we do this by
3390 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3391 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3395 PerlIOBuf base; /* PerlIOBuf stuff */
3396 STDCHAR *nl; /* Position of crlf we "lied" about in the
3401 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3404 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3405 code = PerlIOBuf_pushed(f, mode, arg);
3407 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3408 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3409 PerlIOBase(f)->flags);
3416 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3418 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3423 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3424 return PerlIOBuf_unread(f, vbuf, count);
3426 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3427 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3429 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3434 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3435 b->end = b->ptr = b->buf + b->bufsiz;
3436 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3437 b->posn -= b->bufsiz;
3439 while (count > 0 && b->ptr > b->buf) {
3442 if (b->ptr - 2 >= b->buf) {
3465 PerlIOCrlf_get_cnt(PerlIO *f)
3467 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3470 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3471 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3472 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3473 STDCHAR *nl = b->ptr;
3475 while (nl < b->end && *nl != 0xd)
3477 if (nl < b->end && *nl == 0xd) {
3479 if (nl + 1 < b->end) {
3486 * Not CR,LF but just CR
3494 * Blast - found CR as last char in buffer
3498 * They may not care, defer work as long as
3501 return (nl - b->ptr);
3505 b->ptr++; /* say we have read it as far as
3506 * flush() is concerned */
3507 b->buf++; /* Leave space an front of buffer */
3508 b->bufsiz--; /* Buffer is thus smaller */
3509 code = PerlIO_fill(f); /* Fetch some more */
3510 b->bufsiz++; /* Restore size for next time */
3511 b->buf--; /* Point at space */
3512 b->ptr = nl = b->buf; /* Which is what we hand
3514 b->posn--; /* Buffer starts here */
3515 *nl = 0xd; /* Fill in the CR */
3517 goto test; /* fill() call worked */
3519 * CR at EOF - just fall through
3525 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3531 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3533 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3534 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3535 IV flags = PerlIOBase(f)->flags;
3543 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3550 * Test code - delete when it works ...
3557 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3564 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3565 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3572 * They have taken what we lied about
3580 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3584 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3586 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3587 return PerlIOBuf_write(f, vbuf, count);
3589 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3590 const STDCHAR *buf = (const STDCHAR *) vbuf;
3591 const STDCHAR *ebuf = buf + count;
3594 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3596 while (buf < ebuf) {
3597 STDCHAR *eptr = b->buf + b->bufsiz;
3598 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3599 while (buf < ebuf && b->ptr < eptr) {
3601 if ((b->ptr + 2) > eptr) {
3609 *(b->ptr)++ = 0xd; /* CR */
3610 *(b->ptr)++ = 0xa; /* LF */
3612 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3622 if (b->ptr >= eptr) {
3628 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3630 return (buf - (STDCHAR *) vbuf);
3635 PerlIOCrlf_flush(PerlIO *f)
3637 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3642 return PerlIOBuf_flush(f);
3645 PerlIO_funcs PerlIO_crlf = {
3648 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3650 PerlIOBase_noop_ok, /* popped */
3655 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3657 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3658 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3666 PerlIOBase_clearerr,
3667 PerlIOBase_setlinebuf,
3672 PerlIOCrlf_set_ptrcnt,
3676 /*--------------------------------------------------------------------------------------*/
3678 * mmap as "buffer" layer
3682 PerlIOBuf base; /* PerlIOBuf stuff */
3683 Mmap_t mptr; /* Mapped address */
3684 Size_t len; /* mapped length */
3685 STDCHAR *bbuf; /* malloced buffer if map fails */
3688 static size_t page_size = 0;
3691 PerlIOMmap_map(PerlIO *f)
3694 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3695 IV flags = PerlIOBase(f)->flags;
3699 if (flags & PERLIO_F_CANREAD) {
3700 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3701 int fd = PerlIO_fileno(f);
3703 code = Fstat(fd, &st);
3704 if (code == 0 && S_ISREG(st.st_mode)) {
3705 SSize_t len = st.st_size - b->posn;
3709 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3711 SETERRNO(0, SS$_NORMAL);
3712 # ifdef _SC_PAGESIZE
3713 page_size = sysconf(_SC_PAGESIZE);
3715 page_size = sysconf(_SC_PAGE_SIZE);
3717 if ((long) page_size < 0) {
3722 (void) SvUPGRADE(error, SVt_PV);
3723 msg = SvPVx(error, n_a);
3724 Perl_croak(aTHX_ "panic: sysconf: %s",
3729 "panic: sysconf: pagesize unknown");
3733 # ifdef HAS_GETPAGESIZE
3734 page_size = getpagesize();
3736 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3737 page_size = PAGESIZE; /* compiletime, bad */
3741 if ((IV) page_size <= 0)
3742 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3747 * This is a hack - should never happen - open should
3750 b->posn = PerlIO_tell(PerlIONext(f));
3752 posn = (b->posn / page_size) * page_size;
3753 len = st.st_size - posn;
3754 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3755 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3756 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3757 madvise(m->mptr, len, MADV_SEQUENTIAL);
3759 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3760 madvise(m->mptr, len, MADV_WILLNEED);
3762 PerlIOBase(f)->flags =
3763 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3764 b->end = ((STDCHAR *) m->mptr) + len;
3765 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3774 PerlIOBase(f)->flags =
3775 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3777 b->ptr = b->end = b->ptr;
3786 PerlIOMmap_unmap(PerlIO *f)
3788 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3789 PerlIOBuf *b = &m->base;
3793 code = munmap(m->mptr, m->len);
3797 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3800 b->ptr = b->end = b->buf;
3801 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3807 PerlIOMmap_get_base(PerlIO *f)
3809 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3810 PerlIOBuf *b = &m->base;
3811 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3813 * Already have a readbuffer in progress
3819 * We have a write buffer or flushed PerlIOBuf read buffer
3821 m->bbuf = b->buf; /* save it in case we need it again */
3822 b->buf = NULL; /* Clear to trigger below */
3825 PerlIOMmap_map(f); /* Try and map it */
3828 * Map did not work - recover PerlIOBuf buffer if we have one
3833 b->ptr = b->end = b->buf;
3836 return PerlIOBuf_get_base(f);
3840 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3842 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3843 PerlIOBuf *b = &m->base;
3844 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3846 if (b->ptr && (b->ptr - count) >= b->buf
3847 && memEQ(b->ptr - count, vbuf, count)) {
3849 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3854 * Loose the unwritable mapped buffer
3858 * If flush took the "buffer" see if we have one from before
3860 if (!b->buf && m->bbuf)
3863 PerlIOBuf_get_base(f);
3867 return PerlIOBuf_unread(f, vbuf, count);
3871 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3873 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3874 PerlIOBuf *b = &m->base;
3875 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3877 * No, or wrong sort of, buffer
3880 if (PerlIOMmap_unmap(f) != 0)
3884 * If unmap took the "buffer" see if we have one from before
3886 if (!b->buf && m->bbuf)
3889 PerlIOBuf_get_base(f);
3893 return PerlIOBuf_write(f, vbuf, count);
3897 PerlIOMmap_flush(PerlIO *f)
3899 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3900 PerlIOBuf *b = &m->base;
3901 IV code = PerlIOBuf_flush(f);
3903 * Now we are "synced" at PerlIOBuf level
3910 if (PerlIOMmap_unmap(f) != 0)
3915 * We seem to have a PerlIOBuf buffer which was not mapped
3916 * remember it in case we need one later
3925 PerlIOMmap_fill(PerlIO *f)
3927 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3928 IV code = PerlIO_flush(f);
3929 if (code == 0 && !b->buf) {
3930 code = PerlIOMmap_map(f);
3932 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3933 code = PerlIOBuf_fill(f);
3939 PerlIOMmap_close(PerlIO *f)
3941 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3942 PerlIOBuf *b = &m->base;
3943 IV code = PerlIO_flush(f);
3947 b->ptr = b->end = b->buf;
3949 if (PerlIOBuf_close(f) != 0)
3955 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3957 return PerlIOBase_dup(aTHX_ f, o, param);
3961 PerlIO_funcs PerlIO_mmap = {
3981 PerlIOBase_clearerr,
3982 PerlIOBase_setlinebuf,
3983 PerlIOMmap_get_base,
3987 PerlIOBuf_set_ptrcnt,
3990 #endif /* HAS_MMAP */
3998 PerlIO_stdstreams(aTHX);
4000 return &PL_perlio[1];
4003 #undef PerlIO_stdout
4009 PerlIO_stdstreams(aTHX);
4011 return &PL_perlio[2];
4014 #undef PerlIO_stderr
4020 PerlIO_stdstreams(aTHX);
4022 return &PL_perlio[3];
4025 /*--------------------------------------------------------------------------------------*/
4027 #undef PerlIO_getname
4029 PerlIO_getname(PerlIO *f, char *buf)
4034 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4036 name = fgetname(stdio, buf);
4038 Perl_croak(aTHX_ "Don't know how to get file name");
4044 /*--------------------------------------------------------------------------------------*/
4046 * Functions which can be called on any kind of PerlIO implemented in
4052 PerlIO_getc(PerlIO *f)
4055 SSize_t count = PerlIO_read(f, buf, 1);
4057 return (unsigned char) buf[0];
4062 #undef PerlIO_ungetc
4064 PerlIO_ungetc(PerlIO *f, int ch)
4068 if (PerlIO_unread(f, &buf, 1) == 1)
4076 PerlIO_putc(PerlIO *f, int ch)
4079 return PerlIO_write(f, &buf, 1);
4084 PerlIO_puts(PerlIO *f, const char *s)
4086 STRLEN len = strlen(s);
4087 return PerlIO_write(f, s, len);
4090 #undef PerlIO_rewind
4092 PerlIO_rewind(PerlIO *f)
4094 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4098 #undef PerlIO_vprintf
4100 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4103 SV *sv = newSVpvn("", 0);
4109 Perl_va_copy(ap, apc);
4110 sv_vcatpvf(sv, fmt, &apc);
4112 sv_vcatpvf(sv, fmt, &ap);
4115 wrote = PerlIO_write(f, s, len);
4120 #undef PerlIO_printf
4122 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4127 result = PerlIO_vprintf(f, fmt, ap);
4132 #undef PerlIO_stdoutf
4134 PerlIO_stdoutf(const char *fmt, ...)
4139 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4144 #undef PerlIO_tmpfile
4146 PerlIO_tmpfile(void)
4149 * I have no idea how portable mkstemp() is ...
4151 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4154 FILE *stdio = PerlSIO_tmpfile();
4157 PerlIOSelf(PerlIO_push
4158 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4159 "w+", Nullsv), PerlIOStdio);
4165 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4166 int fd = mkstemp(SvPVX(sv));
4169 f = PerlIO_fdopen(fd, "w+");
4171 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4173 PerlLIO_unlink(SvPVX(sv));
4183 #endif /* USE_SFIO */
4184 #endif /* PERLIO_IS_STDIO */
4186 /*======================================================================================*/
4188 * Now some functions in terms of above which may be needed even if we are
4189 * not in true PerlIO mode
4193 #undef PerlIO_setpos
4195 PerlIO_setpos(PerlIO *f, SV *pos)
4200 Off_t *posn = (Off_t *) SvPV(pos, len);
4201 if (f && len == sizeof(Off_t))
4202 return PerlIO_seek(f, *posn, SEEK_SET);
4204 SETERRNO(EINVAL, SS$_IVCHAN);
4208 #undef PerlIO_setpos
4210 PerlIO_setpos(PerlIO *f, SV *pos)
4215 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4216 if (f && len == sizeof(Fpos_t)) {
4217 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4218 return fsetpos64(f, fpos);
4220 return fsetpos(f, fpos);
4224 SETERRNO(EINVAL, SS$_IVCHAN);
4230 #undef PerlIO_getpos
4232 PerlIO_getpos(PerlIO *f, SV *pos)
4235 Off_t posn = PerlIO_tell(f);
4236 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4237 return (posn == (Off_t) - 1) ? -1 : 0;
4240 #undef PerlIO_getpos
4242 PerlIO_getpos(PerlIO *f, SV *pos)
4247 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4248 code = fgetpos64(f, &fpos);
4250 code = fgetpos(f, &fpos);
4252 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4257 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4260 vprintf(char *pat, char *args)
4262 _doprnt(pat, args, stdout);
4263 return 0; /* wrong, but perl doesn't use the return
4268 vfprintf(FILE *fd, char *pat, char *args)
4270 _doprnt(pat, args, fd);
4271 return 0; /* wrong, but perl doesn't use the return
4277 #ifndef PerlIO_vsprintf
4279 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4281 int val = vsprintf(s, fmt, ap);
4283 if (strlen(s) >= (STRLEN) n) {
4285 (void) PerlIO_puts(Perl_error_log,
4286 "panic: sprintf overflow - memory corrupted!\n");
4294 #ifndef PerlIO_sprintf
4296 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4301 result = PerlIO_vsprintf(s, n, fmt, ap);