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
41 #ifdef PERL_IMPLICIT_CONTEXT
49 perlsio_binmode(FILE *fp, int iotype, int mode)
52 * This used to be contents of do_binmode in doio.c
55 # if defined(atarist) || defined(__MINT__)
58 ((FILE *) fp)->_flag |= _IOBIN;
60 ((FILE *) fp)->_flag &= ~_IOBIN;
67 if (PerlLIO_setmode(fp, mode) != -1) {
69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
71 # if defined(WIN32) && defined(__BORLANDC__)
73 * The translation mode of the stream is maintained independent of
74 * the translation mode of the fd in the Borland RTL (heavy
75 * digging through their runtime sources reveal). User has to set
76 * the mode explicitly for the stream (though they don't document
77 * this anywhere). GSAR 97-5-24
91 # if defined(USEMYBINMODE)
93 if (my_binmode(fp, iotype, mode) != FALSE)
104 #define O_ACCMODE 3 /* Assume traditional implementation */
108 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
110 int result = rawmode & O_ACCMODE;
115 ptype = IoTYPE_RDONLY;
118 ptype = IoTYPE_WRONLY;
126 *writing = (result != O_RDONLY);
128 if (result == O_RDONLY) {
132 else if (rawmode & O_APPEND) {
134 if (result != O_WRONLY)
139 if (result == O_WRONLY)
146 if (rawmode & O_BINARY)
152 #ifndef PERLIO_LAYERS
154 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
156 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
159 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
167 PerlIO_destruct(pTHX)
172 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
177 return perlsio_binmode(fp, iotype, mode);
182 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
186 int fd = PerlLIO_dup(PerlIO_fileno(f));
189 int omode = fcntl(fd, F_GETFL);
190 PerlIO_intmode2str(omode,mode,NULL);
191 /* the r+ is a hack */
192 return PerlIO_fdopen(fd, mode);
197 SETERRNO(EBADF, SS$_IVCHAN);
205 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
209 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
210 int imode, int perm, PerlIO *old, int narg, SV **args)
214 Perl_croak(aTHX_ "More than one argument to open");
216 if (*args == &PL_sv_undef)
217 return PerlIO_tmpfile();
219 char *name = SvPV_nolen(*args);
221 fd = PerlLIO_open3(name, imode, perm);
223 return PerlIO_fdopen(fd, (char *) mode + 1);
226 return PerlIO_reopen(name, mode, old);
229 return PerlIO_open(name, mode);
234 return PerlIO_fdopen(fd, (char *) mode);
239 XS(XS_PerlIO__Layer__find)
243 Perl_croak(aTHX_ "Usage class->find(name[,load])");
245 char *name = SvPV_nolen(ST(1));
246 ST(0) = (strEQ(name, "crlf")
247 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
254 Perl_boot_core_PerlIO(pTHX)
256 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
262 #ifdef PERLIO_IS_STDIO
268 * Does nothing (yet) except force this file to be included in perl
269 * binary. That allows this file to force inclusion of other functions
270 * that may be required by loadable extensions e.g. for
271 * FileHandle::tmpfile
275 #undef PerlIO_tmpfile
282 #else /* PERLIO_IS_STDIO */
290 * This section is just to make sure these functions get pulled in from
294 #undef PerlIO_tmpfile
305 * Force this file to be included in perl binary. Which allows this
306 * file to force inclusion of other functions that may be required by
307 * loadable extensions e.g. for FileHandle::tmpfile
311 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
312 * results in a lot of lseek()s to regular files and lot of small
315 sfset(sfstdout, SF_SHARE, 0);
319 PerlIO_importFILE(FILE *stdio, int fl)
321 int fd = fileno(stdio);
322 PerlIO *r = PerlIO_fdopen(fd, "r+");
327 PerlIO_findFILE(PerlIO *pio)
329 int fd = PerlIO_fileno(pio);
330 FILE *f = fdopen(fd, "r+");
332 if (!f && errno == EINVAL)
334 if (!f && errno == EINVAL)
341 /*======================================================================================*/
343 * Implement all the PerlIO interface ourselves.
349 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
356 #include <sys/mman.h>
360 void PerlIO_debug(const char *fmt, ...)
361 __attribute__ ((format(__printf__, 1, 2)));
364 PerlIO_debug(const char *fmt, ...)
371 char *s = PerlEnv_getenv("PERLIO_DEBUG");
373 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
380 /* Use fixed buffer as sv_catpvf etc. needs SVs */
384 s = CopFILE(PL_curcop);
387 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
388 len = strlen(buffer);
389 vsprintf(buffer+len, fmt, ap);
390 PerlLIO_write(dbg, buffer, strlen(buffer));
392 SV *sv = newSVpvn("", 0);
395 s = CopFILE(PL_curcop);
398 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
399 (IV) CopLINE(PL_curcop));
400 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
403 PerlLIO_write(dbg, s, len);
410 /*--------------------------------------------------------------------------------------*/
413 * Inner level routines
417 * Table of pointers to the PerlIO structs (malloc'ed)
419 #define PERLIO_TABLE_SIZE 64
422 PerlIO_allocate(pTHX)
425 * Find a free slot in the table, allocating new table as necessary
430 while ((f = *last)) {
432 last = (PerlIO **) (f);
433 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
439 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
447 #undef PerlIO_fdupopen
449 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
451 if (PerlIOValid(f)) {
452 PerlIO_funcs *tab = PerlIOBase(f)->tab;
454 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
455 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
459 SETERRNO(EBADF, SS$_IVCHAN);
465 PerlIO_cleantable(pTHX_ PerlIO **tablep)
467 PerlIO *table = *tablep;
470 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
471 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
472 PerlIO *f = table + i;
484 PerlIO_list_alloc(pTHX)
487 Newz('L', list, 1, PerlIO_list_t);
493 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
496 if (--list->refcnt == 0) {
499 for (i = 0; i < list->cur; i++) {
500 if (list->array[i].arg)
501 SvREFCNT_dec(list->array[i].arg);
503 Safefree(list->array);
511 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
514 if (list->cur >= list->len) {
517 Renew(list->array, list->len, PerlIO_pair_t);
519 New('l', list->array, list->len, PerlIO_pair_t);
521 p = &(list->array[list->cur++]);
523 if ((p->arg = arg)) {
529 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
531 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
534 list = PerlIO_list_alloc(aTHX);
535 for (i=0; i < proto->cur; i++) {
537 if (proto->array[i].arg)
538 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
539 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
546 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
549 PerlIO **table = &proto->Iperlio;
552 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
553 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
554 PerlIO_allocate(aTHX); /* root slot is never used */
555 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
556 while ((f = *table)) {
558 table = (PerlIO **) (f++);
559 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
561 (void) fp_dup(f, 0, param);
570 PerlIO_destruct(pTHX)
572 PerlIO **table = &PL_perlio;
575 PerlIO_debug("Destruct %p\n",aTHX);
577 while ((f = *table)) {
579 table = (PerlIO **) (f++);
580 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
584 if (l->tab->kind & PERLIO_K_DESTRUCT) {
585 PerlIO_debug("Destruct popping %s\n", l->tab->name);
596 PerlIO_list_free(aTHX_ PL_known_layers);
597 PL_known_layers = NULL;
598 PerlIO_list_free(aTHX_ PL_def_layerlist);
599 PL_def_layerlist = NULL;
603 PerlIO_pop(pTHX_ PerlIO *f)
607 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
608 if (l->tab->Popped) {
610 * If popped returns non-zero do not free its layer structure
611 * it has either done so itself, or it is shared and still in
614 if ((*l->tab->Popped) (aTHX_ f) != 0)
622 /*--------------------------------------------------------------------------------------*/
624 * XS Interface for perl code
628 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
631 if ((SSize_t) len <= 0)
633 for (i = 0; i < PL_known_layers->cur; i++) {
634 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
635 if (memEQ(f->name, name, len)) {
636 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
640 if (load && PL_subname && PL_def_layerlist
641 && PL_def_layerlist->cur >= 2) {
642 SV *pkgsv = newSVpvn("PerlIO", 6);
643 SV *layer = newSVpvn(name, len);
646 * The two SVs are magically freed by load_module
648 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
650 return PerlIO_find_layer(aTHX_ name, len, 0);
652 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
656 #ifdef USE_ATTRIBUTES_FOR_PERLIO
659 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
662 IO *io = GvIOn((GV *) SvRV(sv));
663 PerlIO *ifp = IoIFP(io);
664 PerlIO *ofp = IoOFP(io);
665 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
671 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
674 IO *io = GvIOn((GV *) SvRV(sv));
675 PerlIO *ifp = IoIFP(io);
676 PerlIO *ofp = IoOFP(io);
677 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
683 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
685 Perl_warn(aTHX_ "clear %" SVf, sv);
690 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
692 Perl_warn(aTHX_ "free %" SVf, sv);
696 MGVTBL perlio_vtab = {
704 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
707 SV *sv = SvRV(ST(1));
712 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
714 mg = mg_find(sv, PERL_MAGIC_ext);
715 mg->mg_virtual = &perlio_vtab;
717 Perl_warn(aTHX_ "attrib %" SVf, sv);
718 for (i = 2; i < items; i++) {
720 const char *name = SvPV(ST(i), len);
721 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
723 av_push(av, SvREFCNT_inc(layer));
734 #endif /* USE_ATTIBUTES_FOR_PERLIO */
737 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
739 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
740 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
744 XS(XS_PerlIO__Layer__find)
748 Perl_croak(aTHX_ "Usage class->find(name[,load])");
751 char *name = SvPV(ST(1), len);
752 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
753 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
755 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
762 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
764 if (!PL_known_layers)
765 PL_known_layers = PerlIO_list_alloc(aTHX);
766 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
767 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
771 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
774 const char *s = names;
776 while (isSPACE(*s) || *s == ':')
781 const char *as = Nullch;
783 if (!isIDFIRST(*s)) {
785 * Message is consistent with how attribute lists are
786 * passed. Even though this means "foo : : bar" is
787 * seen as an invalid separator character.
789 char q = ((*s == '\'') ? '"' : '\'');
791 "perlio: invalid separator character %c%c%c in layer specification list %s",
797 } while (isALNUM(*e));
813 * It's a nul terminated string, not allowed
814 * to \ the terminating null. Anything other
815 * character is passed over.
826 "perlio: argument list not closed for layer \"%.*s\"",
838 PerlIO_funcs *layer =
839 PerlIO_find_layer(aTHX_ s, llen, 1);
841 PerlIO_list_push(aTHX_ av, layer,
847 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
860 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
862 PerlIO_funcs *tab = &PerlIO_perlio;
863 #ifdef PERLIO_USING_CRLF
866 if (PerlIO_stdio.Set_ptrcnt)
869 PerlIO_debug("Pushing %s\n", tab->name);
870 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
875 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
877 return av->array[n].arg;
881 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
883 if (n >= 0 && n < av->cur) {
884 PerlIO_debug("Layer %" IVdf " is %s\n", n,
885 av->array[n].funcs->name);
886 return av->array[n].funcs;
889 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
894 PerlIO_default_layers(pTHX)
896 if (!PL_def_layerlist) {
897 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
898 PerlIO_funcs *osLayer = &PerlIO_unix;
899 PL_def_layerlist = PerlIO_list_alloc(aTHX);
900 PerlIO_define_layer(aTHX_ & PerlIO_unix);
901 #if defined(WIN32) && !defined(UNDER_CE)
902 PerlIO_define_layer(aTHX_ & PerlIO_win32);
904 osLayer = &PerlIO_win32;
907 PerlIO_define_layer(aTHX_ & PerlIO_raw);
908 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
909 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
910 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
912 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
914 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
915 PerlIO_define_layer(aTHX_ & PerlIO_byte);
916 PerlIO_list_push(aTHX_ PL_def_layerlist,
917 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
920 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
923 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
926 if (PL_def_layerlist->cur < 2) {
927 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
929 return PL_def_layerlist;
933 Perl_boot_core_PerlIO(pTHX)
935 #ifdef USE_ATTRIBUTES_FOR_PERLIO
936 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
939 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
943 PerlIO_default_layer(pTHX_ I32 n)
945 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
948 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
951 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
952 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
955 PerlIO_stdstreams(pTHX)
958 PerlIO_allocate(aTHX);
959 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
960 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
961 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
966 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
969 Newc('L',l,tab->size,char,PerlIOl);
971 Zero(l, tab->size, char);
975 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
976 (mode) ? mode : "(Null)", (void*)arg);
977 if ((*l->tab->Pushed) (aTHX_ f, mode, arg) != 0) {
986 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
998 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1001 * Remove the dummy layer
1003 PerlIO_pop(aTHX_ f);
1005 * Pop back to bottom layer
1007 if (PerlIOValid(f)) {
1009 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1010 if (*PerlIONext(f)) {
1011 PerlIO_pop(aTHX_ f);
1015 * Nothing bellow - push unix on top then remove it
1017 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1018 PerlIO_pop(aTHX_ PerlIONext(f));
1023 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1030 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1031 PerlIO_list_t *layers, IV n)
1033 IV max = layers->cur;
1036 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1038 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1049 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1053 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1054 code = PerlIO_parse_layers(aTHX_ layers, names);
1056 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1058 PerlIO_list_free(aTHX_ layers);
1064 /*--------------------------------------------------------------------------------------*/
1066 * Given the abstraction above the public API functions
1070 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1072 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1073 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1074 (names) ? names : "(Null)");
1075 /* Can't flush if switching encodings. */
1076 if (!(names && memEQ(names, ":encoding(", 10))) {
1078 #ifdef PERLIO_USING_CRLF
1079 if (!names && (mode & O_BINARY)) {
1082 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1083 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1086 top = PerlIONext(top);
1092 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1096 PerlIO__close(pTHX_ PerlIO *f)
1099 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1101 SETERRNO(EBADF, SS$_IVCHAN);
1107 Perl_PerlIO_close(pTHX_ PerlIO *f)
1110 if (PerlIOValid(f)) {
1111 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1113 PerlIO_pop(aTHX_ f);
1120 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1123 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1125 SETERRNO(EBADF, SS$_IVCHAN);
1131 PerlIO_context_layers(pTHX_ const char *mode)
1133 const char *type = NULL;
1135 * Need to supply default layer info from open.pm
1138 SV *layers = PL_curcop->cop_io;
1141 type = SvPV(layers, len);
1142 if (type && mode[0] != 'r') {
1144 * Skip to write part
1146 const char *s = strchr(type, 0);
1147 if (s && (s - type) < len) {
1156 static PerlIO_funcs *
1157 PerlIO_layer_from_ref(pTHX_ SV *sv)
1160 * For any scalar type load the handler which is bundled with perl
1162 if (SvTYPE(sv) < SVt_PVAV)
1163 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1166 * For other types allow if layer is known but don't try and load it
1168 switch (SvTYPE(sv)) {
1170 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1172 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1174 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1176 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1182 PerlIO_resolve_layers(pTHX_ const char *layers,
1183 const char *mode, int narg, SV **args)
1185 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1188 PerlIO_stdstreams(aTHX);
1192 * If it is a reference but not an object see if we have a handler
1195 if (SvROK(arg) && !sv_isobject(arg)) {
1196 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1198 def = PerlIO_list_alloc(aTHX);
1199 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1203 * Don't fail if handler cannot be found :Via(...) etc. may do
1204 * something sensible else we will just stringfy and open
1210 layers = PerlIO_context_layers(aTHX_ mode);
1211 if (layers && *layers) {
1215 av = PerlIO_list_alloc(aTHX);
1216 for (i = 0; i < def->cur; i++) {
1217 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1224 PerlIO_parse_layers(aTHX_ av, layers);
1235 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1236 int imode, int perm, PerlIO *f, int narg, SV **args)
1238 if (!f && narg == 1 && *args == &PL_sv_undef) {
1239 if ((f = PerlIO_tmpfile())) {
1241 layers = PerlIO_context_layers(aTHX_ mode);
1242 if (layers && *layers)
1243 PerlIO_apply_layers(aTHX_ f, mode, layers);
1247 PerlIO_list_t *layera = NULL;
1249 PerlIO_funcs *tab = NULL;
1250 if (PerlIOValid(f)) {
1252 * This is "reopen" - it is not tested as perl does not use it
1256 layera = PerlIO_list_alloc(aTHX);
1258 SV *arg = (l->tab->Getarg)
1259 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1261 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1262 l = *PerlIONext(&l);
1266 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1269 * Start at "top" of layer stack
1271 n = layera->cur - 1;
1273 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1282 * Found that layer 'n' can do opens - call it
1284 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1285 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1287 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1288 tab->name, layers, mode, fd, imode, perm,
1289 (void*)f, narg, (void*)args);
1290 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1293 if (n + 1 < layera->cur) {
1295 * More layers above the one that we used to open -
1298 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1305 PerlIO_list_free(aTHX_ layera);
1312 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1315 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1317 SETERRNO(EBADF, SS$_IVCHAN);
1323 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1326 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1328 SETERRNO(EBADF, SS$_IVCHAN);
1334 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1337 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1339 SETERRNO(EBADF, SS$_IVCHAN);
1345 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1348 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1350 SETERRNO(EBADF, SS$_IVCHAN);
1356 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1359 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1361 SETERRNO(EBADF, SS$_IVCHAN);
1367 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1371 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1372 if (tab && tab->Flush) {
1373 return (*tab->Flush) (aTHX_ f);
1376 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1377 SETERRNO(EBADF, SS$_IVCHAN);
1382 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1383 SETERRNO(EBADF, SS$_IVCHAN);
1389 * Is it good API design to do flush-all on NULL, a potentially
1390 * errorneous input? Maybe some magical value (PerlIO*
1391 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1392 * things on fflush(NULL), but should we be bound by their design
1395 PerlIO **table = &PL_perlio;
1397 while ((f = *table)) {
1399 table = (PerlIO **) (f++);
1400 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1401 if (*f && PerlIO_flush(f) != 0)
1411 PerlIOBase_flush_linebuf(pTHX)
1413 PerlIO **table = &PL_perlio;
1415 while ((f = *table)) {
1417 table = (PerlIO **) (f++);
1418 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1421 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1422 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1430 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1433 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1435 SETERRNO(EBADF, SS$_IVCHAN);
1441 PerlIO_isutf8(PerlIO *f)
1444 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1446 SETERRNO(EBADF, SS$_IVCHAN);
1452 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1455 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1457 SETERRNO(EBADF, SS$_IVCHAN);
1463 Perl_PerlIO_error(pTHX_ PerlIO *f)
1466 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1468 SETERRNO(EBADF, SS$_IVCHAN);
1474 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1477 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1479 SETERRNO(EBADF, SS$_IVCHAN);
1483 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1486 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1488 SETERRNO(EBADF, SS$_IVCHAN);
1492 PerlIO_has_base(PerlIO *f)
1494 if (PerlIOValid(f)) {
1495 return (PerlIOBase(f)->tab->Get_base != NULL);
1501 PerlIO_fast_gets(PerlIO *f)
1503 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1504 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1505 return (tab->Set_ptrcnt != NULL);
1511 PerlIO_has_cntptr(PerlIO *f)
1513 if (PerlIOValid(f)) {
1514 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1515 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1521 PerlIO_canset_cnt(PerlIO *f)
1523 if (PerlIOValid(f)) {
1524 PerlIOl *l = PerlIOBase(f);
1525 return (l->tab->Set_ptrcnt != NULL);
1531 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1534 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1539 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1542 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1547 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1549 if (PerlIOValid(f)) {
1550 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1551 if (tab->Get_ptr == NULL)
1553 return (*tab->Get_ptr) (aTHX_ f);
1559 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1561 if (PerlIOValid(f)) {
1562 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1563 if (tab->Get_cnt == NULL)
1565 return (*tab->Get_cnt) (aTHX_ f);
1571 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1573 if (PerlIOValid(f)) {
1574 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1579 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1581 if (PerlIOValid(f)) {
1582 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1583 if (tab->Set_ptrcnt == NULL) {
1584 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1586 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1590 /*--------------------------------------------------------------------------------------*/
1592 * utf8 and raw dummy layers
1596 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1598 if (*PerlIONext(f)) {
1599 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1600 PerlIO_pop(aTHX_ f);
1601 if (tab->kind & PERLIO_K_UTF8)
1602 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1604 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1610 PerlIO_funcs PerlIO_utf8 = {
1613 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1631 NULL, /* get_base */
1632 NULL, /* get_bufsiz */
1635 NULL, /* set_ptrcnt */
1638 PerlIO_funcs PerlIO_byte = {
1659 NULL, /* get_base */
1660 NULL, /* get_bufsiz */
1663 NULL, /* set_ptrcnt */
1667 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1668 IV n, const char *mode, int fd, int imode, int perm,
1669 PerlIO *old, int narg, SV **args)
1671 PerlIO_funcs *tab = PerlIO_default_btm();
1672 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1676 PerlIO_funcs PerlIO_raw = {
1697 NULL, /* get_base */
1698 NULL, /* get_bufsiz */
1701 NULL, /* set_ptrcnt */
1703 /*--------------------------------------------------------------------------------------*/
1704 /*--------------------------------------------------------------------------------------*/
1706 * "Methods" of the "base class"
1710 PerlIOBase_fileno(pTHX_ PerlIO *f)
1712 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1716 PerlIO_modestr(PerlIO *f, char *buf)
1719 IV flags = PerlIOBase(f)->flags;
1720 if (flags & PERLIO_F_APPEND) {
1722 if (flags & PERLIO_F_CANREAD) {
1726 else if (flags & PERLIO_F_CANREAD) {
1728 if (flags & PERLIO_F_CANWRITE)
1731 else if (flags & PERLIO_F_CANWRITE) {
1733 if (flags & PERLIO_F_CANREAD) {
1737 #ifdef PERLIO_USING_CRLF
1738 if (!(flags & PERLIO_F_CRLF))
1746 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1748 PerlIOl *l = PerlIOBase(f);
1750 const char *omode = mode;
1753 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1754 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1755 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1756 if (tab->Set_ptrcnt != NULL)
1757 l->flags |= PERLIO_F_FASTGETS;
1759 if (*mode == '#' || *mode == 'I')
1763 l->flags |= PERLIO_F_CANREAD;
1766 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1769 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1772 SETERRNO(EINVAL, LIB$_INVARG);
1778 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1781 l->flags &= ~PERLIO_F_CRLF;
1784 l->flags |= PERLIO_F_CRLF;
1787 SETERRNO(EINVAL, LIB$_INVARG);
1794 l->flags |= l->next->flags &
1795 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1800 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1801 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1802 l->flags, PerlIO_modestr(f, temp));
1808 PerlIOBase_popped(pTHX_ PerlIO *f)
1814 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1817 * Save the position as current head considers it
1819 Off_t old = PerlIO_tell(f);
1821 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1822 PerlIOSelf(f, PerlIOBuf)->posn = old;
1823 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1828 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1830 STDCHAR *buf = (STDCHAR *) vbuf;
1832 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1835 SSize_t avail = PerlIO_get_cnt(f);
1838 take = (count < avail) ? count : avail;
1840 STDCHAR *ptr = PerlIO_get_ptr(f);
1841 Copy(ptr, buf, take, STDCHAR);
1842 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1846 if (count > 0 && avail <= 0) {
1847 if (PerlIO_fill(f) != 0)
1851 return (buf - (STDCHAR *) vbuf);
1857 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1863 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1869 PerlIOBase_close(pTHX_ PerlIO *f)
1872 PerlIO *n = PerlIONext(f);
1873 if (PerlIO_flush(f) != 0)
1875 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1877 PerlIOBase(f)->flags &=
1878 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1883 PerlIOBase_eof(pTHX_ PerlIO *f)
1885 if (PerlIOValid(f)) {
1886 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1892 PerlIOBase_error(pTHX_ PerlIO *f)
1894 if (PerlIOValid(f)) {
1895 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1901 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1903 if (PerlIOValid(f)) {
1904 PerlIO *n = PerlIONext(f);
1905 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1912 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
1914 if (PerlIOValid(f)) {
1915 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1920 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1926 return sv_dup(arg, param);
1929 return newSVsv(arg);
1932 return newSVsv(arg);
1937 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1939 PerlIO *nexto = PerlIONext(o);
1940 if (PerlIOValid(nexto)) {
1941 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1942 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
1945 PerlIO_funcs *self = PerlIOBase(o)->tab;
1948 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
1949 self->name, (void*)f, (void*)o, (void*)param);
1951 arg = (*self->Getarg)(aTHX_ o,param,flags);
1953 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1961 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1963 perl_mutex PerlIO_mutex;
1965 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
1970 /* Place holder for stdstreams call ??? */
1972 MUTEX_INIT(&PerlIO_mutex);
1977 PerlIOUnix_refcnt_inc(int fd)
1979 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1981 MUTEX_LOCK(&PerlIO_mutex);
1983 PerlIO_fd_refcnt[fd]++;
1984 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
1986 MUTEX_UNLOCK(&PerlIO_mutex);
1992 PerlIOUnix_refcnt_dec(int fd)
1995 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1997 MUTEX_LOCK(&PerlIO_mutex);
1999 cnt = --PerlIO_fd_refcnt[fd];
2000 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2002 MUTEX_UNLOCK(&PerlIO_mutex);
2009 PerlIO_cleanup(pTHX)
2013 PerlIO_debug("Cleanup %p\n",aTHX);
2015 /* Raise STDIN..STDERR refcount so we don't close them */
2016 for (i=0; i < 3; i++)
2017 PerlIOUnix_refcnt_inc(i);
2018 PerlIO_cleantable(aTHX_ &PL_perlio);
2019 /* Restore STDIN..STDERR refcount */
2020 for (i=0; i < 3; i++)
2021 PerlIOUnix_refcnt_dec(i);
2026 /*--------------------------------------------------------------------------------------*/
2028 * Bottom-most level for UNIX-like case
2032 struct _PerlIO base; /* The generic part */
2033 int fd; /* UNIX like file descriptor */
2034 int oflags; /* open/fcntl flags */
2038 PerlIOUnix_oflags(const char *mode)
2041 if (*mode == 'I' || *mode == '#')
2046 if (*++mode == '+') {
2053 oflags = O_CREAT | O_TRUNC;
2054 if (*++mode == '+') {
2063 oflags = O_CREAT | O_APPEND;
2064 if (*++mode == '+') {
2077 else if (*mode == 't') {
2079 oflags &= ~O_BINARY;
2083 * Always open in binary mode
2086 if (*mode || oflags == -1) {
2087 SETERRNO(EINVAL, LIB$_INVARG);
2094 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2096 return PerlIOSelf(f, PerlIOUnix)->fd;
2100 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2102 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2103 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2104 if (*PerlIONext(f)) {
2105 s->fd = PerlIO_fileno(PerlIONext(f));
2107 * XXX could (or should) we retrieve the oflags from the open file
2108 * handle rather than believing the "mode" we are passed in? XXX
2109 * Should the value on NULL mode be 0 or -1?
2111 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2113 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2118 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2119 IV n, const char *mode, int fd, int imode,
2120 int perm, PerlIO *f, int narg, SV **args)
2123 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2124 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2127 char *path = SvPV_nolen(*args);
2131 imode = PerlIOUnix_oflags(mode);
2135 fd = PerlLIO_open3(path, imode, perm);
2143 f = PerlIO_allocate(aTHX);
2144 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2148 s = PerlIOSelf(f, PerlIOUnix);
2151 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2152 PerlIOUnix_refcnt_inc(fd);
2158 * FIXME: pop layers ???
2166 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2168 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2170 if (flags & PERLIO_DUP_FD) {
2171 fd = PerlLIO_dup(fd);
2173 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2174 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2176 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2177 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2179 PerlIOUnix_refcnt_inc(fd);
2188 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2190 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2191 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2194 SSize_t len = PerlLIO_read(fd, vbuf, count);
2195 if (len >= 0 || errno != EINTR) {
2197 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2198 else if (len == 0 && count != 0)
2199 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2207 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2209 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2211 SSize_t len = PerlLIO_write(fd, vbuf, count);
2212 if (len >= 0 || errno != EINTR) {
2214 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2222 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2225 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2226 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2227 return (new == (Off_t) - 1) ? -1 : 0;
2231 PerlIOUnix_tell(pTHX_ PerlIO *f)
2233 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2238 PerlIOUnix_close(pTHX_ PerlIO *f)
2240 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2242 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2243 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2244 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2249 SETERRNO(EBADF,SS$_IVCHAN);
2252 while (PerlLIO_close(fd) != 0) {
2253 if (errno != EINTR) {
2260 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2265 PerlIO_funcs PerlIO_unix = {
2281 PerlIOBase_noop_ok, /* flush */
2282 PerlIOBase_noop_fail, /* fill */
2285 PerlIOBase_clearerr,
2286 PerlIOBase_setlinebuf,
2287 NULL, /* get_base */
2288 NULL, /* get_bufsiz */
2291 NULL, /* set_ptrcnt */
2294 /*--------------------------------------------------------------------------------------*/
2300 struct _PerlIO base;
2301 FILE *stdio; /* The stream */
2305 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2307 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2311 PerlIOStdio_mode(const char *mode, char *tmode)
2317 #ifdef PERLIO_USING_CRLF
2325 * This isn't used yet ...
2328 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2330 if (*PerlIONext(f)) {
2331 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2334 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2335 PerlIOStdio_mode(mode, tmode));
2341 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2345 PerlIO_importFILE(FILE *stdio, int fl)
2351 PerlIOSelf(PerlIO_push
2352 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2353 "r+", Nullsv), PerlIOStdio);
2360 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2361 IV n, const char *mode, int fd, int imode,
2362 int perm, PerlIO *f, int narg, SV **args)
2366 char *path = SvPV_nolen(*args);
2367 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2369 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2370 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2375 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2380 char *path = SvPV_nolen(*args);
2383 fd = PerlLIO_open3(path, imode, perm);
2386 FILE *stdio = PerlSIO_fopen(path, mode);
2389 PerlIOSelf(PerlIO_push
2390 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2391 (mode = PerlIOStdio_mode(mode, tmode)),
2395 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2410 stdio = PerlSIO_stdin;
2413 stdio = PerlSIO_stdout;
2416 stdio = PerlSIO_stderr;
2421 stdio = PerlSIO_fdopen(fd, mode =
2422 PerlIOStdio_mode(mode, tmode));
2426 PerlIOSelf(PerlIO_push
2427 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2428 mode, PerlIOArg), PerlIOStdio);
2430 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2439 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2441 /* This assumes no layers underneath - which is what
2442 happens, but is not how I remember it. NI-S 2001/10/16
2444 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2445 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2446 if (flags & PERLIO_DUP_FD) {
2447 int fd = PerlLIO_dup(fileno(stdio));
2450 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2453 /* FIXME: To avoid messy error recovery if dup fails
2454 re-use the existing stdio as though flag was not set
2458 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2459 PerlIOUnix_refcnt_inc(fileno(stdio));
2465 PerlIOStdio_close(pTHX_ PerlIO *f)
2467 #ifdef SOCKS5_VERSION_NAME
2469 Sock_size_t optlen = sizeof(int);
2471 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2472 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2473 /* Do not close it but do flush any buffers */
2478 #ifdef SOCKS5_VERSION_NAME
2480 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2482 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2484 PerlSIO_fclose(stdio)
2493 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2495 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2498 STDCHAR *buf = (STDCHAR *) vbuf;
2500 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2501 * stdio does not do that for fread()
2503 int ch = PerlSIO_fgetc(s);
2510 got = PerlSIO_fread(vbuf, 1, count, s);
2515 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2517 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2518 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2521 int ch = *buf-- & 0xff;
2522 if (PerlSIO_ungetc(ch, s) != ch)
2531 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2533 return PerlSIO_fwrite(vbuf, 1, count,
2534 PerlIOSelf(f, PerlIOStdio)->stdio);
2538 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2540 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2541 return PerlSIO_fseek(stdio, offset, whence);
2545 PerlIOStdio_tell(pTHX_ PerlIO *f)
2547 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2548 return PerlSIO_ftell(stdio);
2552 PerlIOStdio_flush(pTHX_ PerlIO *f)
2554 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2555 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2556 return PerlSIO_fflush(stdio);
2561 * FIXME: This discards ungetc() and pre-read stuff which is not
2562 * right if this is just a "sync" from a layer above Suspect right
2563 * design is to do _this_ but not have layer above flush this
2564 * layer read-to-read
2567 * Not writeable - sync by attempting a seek
2570 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2578 PerlIOStdio_fill(pTHX_ PerlIO *f)
2580 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2583 * fflush()ing read-only streams can cause trouble on some stdio-s
2585 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2586 if (PerlSIO_fflush(stdio) != 0)
2589 c = PerlSIO_fgetc(stdio);
2590 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2596 PerlIOStdio_eof(pTHX_ PerlIO *f)
2598 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2602 PerlIOStdio_error(pTHX_ PerlIO *f)
2604 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2608 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2610 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2614 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2616 #ifdef HAS_SETLINEBUF
2617 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2619 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2625 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2627 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2628 return (STDCHAR*)PerlSIO_get_base(stdio);
2632 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2634 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2635 return PerlSIO_get_bufsiz(stdio);
2639 #ifdef USE_STDIO_PTR
2641 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2643 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2644 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2648 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2650 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2651 return PerlSIO_get_cnt(stdio);
2655 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2657 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2659 #ifdef STDIO_PTR_LVALUE
2660 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2661 #ifdef STDIO_PTR_LVAL_SETS_CNT
2662 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2663 assert(PerlSIO_get_cnt(stdio) == (cnt));
2666 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2668 * Setting ptr _does_ change cnt - we are done
2672 #else /* STDIO_PTR_LVALUE */
2674 #endif /* STDIO_PTR_LVALUE */
2677 * Now (or only) set cnt
2679 #ifdef STDIO_CNT_LVALUE
2680 PerlSIO_set_cnt(stdio, cnt);
2681 #else /* STDIO_CNT_LVALUE */
2682 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2683 PerlSIO_set_ptr(stdio,
2684 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2686 #else /* STDIO_PTR_LVAL_SETS_CNT */
2688 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2689 #endif /* STDIO_CNT_LVALUE */
2694 PerlIO_funcs PerlIO_stdio = {
2696 sizeof(PerlIOStdio),
2714 PerlIOStdio_clearerr,
2715 PerlIOStdio_setlinebuf,
2717 PerlIOStdio_get_base,
2718 PerlIOStdio_get_bufsiz,
2723 #ifdef USE_STDIO_PTR
2724 PerlIOStdio_get_ptr,
2725 PerlIOStdio_get_cnt,
2726 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2727 PerlIOStdio_set_ptrcnt
2728 #else /* STDIO_PTR_LVALUE */
2730 #endif /* STDIO_PTR_LVALUE */
2731 #else /* USE_STDIO_PTR */
2735 #endif /* USE_STDIO_PTR */
2739 PerlIO_exportFILE(PerlIO *f, int fl)
2744 stdio = fdopen(PerlIO_fileno(f), "r+");
2747 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2755 PerlIO_findFILE(PerlIO *f)
2759 if (l->tab == &PerlIO_stdio) {
2760 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2763 l = *PerlIONext(&l);
2765 return PerlIO_exportFILE(f, 0);
2769 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2773 /*--------------------------------------------------------------------------------------*/
2775 * perlio buffer layer
2779 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2781 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2782 int fd = PerlIO_fileno(f);
2784 if (fd >= 0 && PerlLIO_isatty(fd)) {
2785 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2787 posn = PerlIO_tell(PerlIONext(f));
2788 if (posn != (Off_t) - 1) {
2791 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2795 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2796 IV n, const char *mode, int fd, int imode, int perm,
2797 PerlIO *f, int narg, SV **args)
2799 if (PerlIOValid(f)) {
2800 PerlIO *next = PerlIONext(f);
2801 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2802 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2804 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
2809 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2817 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2820 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2822 * if push fails during open, open fails. close will pop us.
2827 fd = PerlIO_fileno(f);
2828 #ifdef PERLIO_USING_CRLF
2830 * do something about failing setmode()? --jhi
2832 PerlLIO_setmode(fd, O_BINARY);
2834 if (init && fd == 2) {
2836 * Initial stderr is unbuffered
2838 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2847 * This "flush" is akin to sfio's sync in that it handles files in either
2848 * read or write state
2851 PerlIOBuf_flush(pTHX_ PerlIO *f)
2853 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2855 PerlIO *n = PerlIONext(f);
2856 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2858 * write() the buffer
2860 STDCHAR *buf = b->buf;
2862 while (p < b->ptr) {
2863 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2867 else if (count < 0 || PerlIO_error(n)) {
2868 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2873 b->posn += (p - buf);
2875 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2876 STDCHAR *buf = PerlIO_get_base(f);
2878 * Note position change
2880 b->posn += (b->ptr - buf);
2881 if (b->ptr < b->end) {
2883 * We did not consume all of it
2885 if (PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
2886 /* Reload n as some layers may pop themselves on seek */
2887 b->posn = PerlIO_tell(n = PerlIONext(f));
2891 b->ptr = b->end = b->buf;
2892 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2893 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
2894 /* FIXME: Doing downstream flush may be sub-optimal see PerlIOBuf_fill() below */
2895 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
2901 PerlIOBuf_fill(pTHX_ PerlIO *f)
2903 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2904 PerlIO *n = PerlIONext(f);
2907 * FIXME: doing the down-stream flush maybe sub-optimal if it causes
2908 * pre-read data in stdio buffer to be discarded.
2909 * However, skipping the flush also skips _our_ hosekeeping
2910 * and breaks tell tests. So we do the flush.
2912 if (PerlIO_flush(f) != 0)
2914 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2915 PerlIOBase_flush_linebuf(aTHX);
2918 PerlIO_get_base(f); /* allocate via vtable */
2920 b->ptr = b->end = b->buf;
2921 if (PerlIO_fast_gets(n)) {
2923 * Layer below is also buffered. We do _NOT_ want to call its
2924 * ->Read() because that will loop till it gets what we asked for
2925 * which may hang on a pipe etc. Instead take anything it has to
2926 * hand, or ask it to fill _once_.
2928 avail = PerlIO_get_cnt(n);
2930 avail = PerlIO_fill(n);
2932 avail = PerlIO_get_cnt(n);
2934 if (!PerlIO_error(n) && PerlIO_eof(n))
2939 STDCHAR *ptr = PerlIO_get_ptr(n);
2940 SSize_t cnt = avail;
2941 if (avail > b->bufsiz)
2943 Copy(ptr, b->buf, avail, STDCHAR);
2944 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2948 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2952 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2954 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2957 b->end = b->buf + avail;
2958 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2963 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2965 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2966 if (PerlIOValid(f)) {
2969 return PerlIOBase_read(aTHX_ f, vbuf, count);
2975 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2977 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2978 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2981 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2986 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2988 * Buffer is already a read buffer, we can overwrite any chars
2989 * which have been read back to buffer start
2991 avail = (b->ptr - b->buf);
2995 * Buffer is idle, set it up so whole buffer is available for
2999 b->end = b->buf + avail;
3001 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3003 * Buffer extends _back_ from where we are now
3005 b->posn -= b->bufsiz;
3007 if (avail > (SSize_t) count) {
3009 * If we have space for more than count, just move count
3017 * In simple stdio-like ungetc() case chars will be already
3020 if (buf != b->ptr) {
3021 Copy(buf, b->ptr, avail, STDCHAR);
3025 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3032 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3035 const STDCHAR *buf = (const STDCHAR *) vbuf;
3039 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3042 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3043 if ((SSize_t) count < avail)
3045 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3046 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3061 Copy(buf, b->ptr, avail, STDCHAR);
3068 if (b->ptr >= (b->buf + b->bufsiz))
3071 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3077 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3080 if ((code = PerlIO_flush(f)) == 0) {
3081 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3082 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3083 code = PerlIO_seek(PerlIONext(f), offset, whence);
3085 b->posn = PerlIO_tell(PerlIONext(f));
3092 PerlIOBuf_tell(pTHX_ PerlIO *f)
3094 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3096 * b->posn is file position where b->buf was read, or will be written
3098 Off_t posn = b->posn;
3101 * If buffer is valid adjust position by amount in buffer
3103 posn += (b->ptr - b->buf);
3109 PerlIOBuf_close(pTHX_ PerlIO *f)
3111 IV code = PerlIOBase_close(aTHX_ f);
3112 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3113 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3117 b->ptr = b->end = b->buf;
3118 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3123 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3125 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3132 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3134 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3137 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3138 return (b->end - b->ptr);
3143 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3145 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3150 Newz('B',b->buf,b->bufsiz, STDCHAR);
3152 b->buf = (STDCHAR *) & b->oneword;
3153 b->bufsiz = sizeof(b->oneword);
3162 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3164 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3167 return (b->end - b->buf);
3171 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3173 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3177 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3178 assert(PerlIO_get_cnt(f) == cnt);
3179 assert(b->ptr >= b->buf);
3181 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3185 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3187 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3192 PerlIO_funcs PerlIO_perlio = {
3212 PerlIOBase_clearerr,
3213 PerlIOBase_setlinebuf,
3218 PerlIOBuf_set_ptrcnt,
3221 /*--------------------------------------------------------------------------------------*/
3223 * Temp layer to hold unread chars when cannot do it any other way
3227 PerlIOPending_fill(pTHX_ PerlIO *f)
3230 * Should never happen
3237 PerlIOPending_close(pTHX_ PerlIO *f)
3240 * A tad tricky - flush pops us, then we close new top
3243 return PerlIO_close(f);
3247 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3250 * A tad tricky - flush pops us, then we seek new top
3253 return PerlIO_seek(f, offset, whence);
3258 PerlIOPending_flush(pTHX_ PerlIO *f)
3260 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3261 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3265 PerlIO_pop(aTHX_ f);
3270 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3276 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3281 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3283 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3284 PerlIOl *l = PerlIOBase(f);
3286 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3287 * etc. get muddled when it changes mid-string when we auto-pop.
3289 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3290 (PerlIOBase(PerlIONext(f))->
3291 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3296 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3298 SSize_t avail = PerlIO_get_cnt(f);
3303 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3304 if (got >= 0 && got < count) {
3306 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3307 if (more >= 0 || got == 0)
3313 PerlIO_funcs PerlIO_pending = {
3317 PerlIOPending_pushed,
3328 PerlIOPending_close,
3329 PerlIOPending_flush,
3333 PerlIOBase_clearerr,
3334 PerlIOBase_setlinebuf,
3339 PerlIOPending_set_ptrcnt,
3344 /*--------------------------------------------------------------------------------------*/
3346 * crlf - translation On read translate CR,LF to "\n" we do this by
3347 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3348 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3352 PerlIOBuf base; /* PerlIOBuf stuff */
3353 STDCHAR *nl; /* Position of crlf we "lied" about in the
3358 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3361 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3362 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3364 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3365 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3366 PerlIOBase(f)->flags);
3373 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3375 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3380 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3381 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3383 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3384 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3386 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3391 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3392 b->end = b->ptr = b->buf + b->bufsiz;
3393 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3394 b->posn -= b->bufsiz;
3396 while (count > 0 && b->ptr > b->buf) {
3399 if (b->ptr - 2 >= b->buf) {
3422 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3424 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3427 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3428 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3429 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3430 STDCHAR *nl = b->ptr;
3432 while (nl < b->end && *nl != 0xd)
3434 if (nl < b->end && *nl == 0xd) {
3436 if (nl + 1 < b->end) {
3443 * Not CR,LF but just CR
3451 * Blast - found CR as last char in buffer
3456 * They may not care, defer work as long as
3460 return (nl - b->ptr);
3464 b->ptr++; /* say we have read it as far as
3465 * flush() is concerned */
3466 b->buf++; /* Leave space in front of buffer */
3467 b->bufsiz--; /* Buffer is thus smaller */
3468 code = PerlIO_fill(f); /* Fetch some more */
3469 b->bufsiz++; /* Restore size for next time */
3470 b->buf--; /* Point at space */
3471 b->ptr = nl = b->buf; /* Which is what we hand
3473 b->posn--; /* Buffer starts here */
3474 *nl = 0xd; /* Fill in the CR */
3476 goto test; /* fill() call worked */
3478 * CR at EOF - just fall through
3480 /* Should we clear EOF though ??? */
3485 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3491 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3493 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3494 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3495 IV flags = PerlIOBase(f)->flags;
3501 if (ptr == b->end && *c->nl == 0xd) {
3502 /* Defered CR at end of buffer case - we lied about count */
3513 * Test code - delete when it works ...
3515 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3516 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3517 /* Defered CR at end of buffer case - we lied about count */
3523 Perl_warn(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3524 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3531 * They have taken what we lied about
3539 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3543 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3545 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3546 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3548 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3549 const STDCHAR *buf = (const STDCHAR *) vbuf;
3550 const STDCHAR *ebuf = buf + count;
3553 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3555 while (buf < ebuf) {
3556 STDCHAR *eptr = b->buf + b->bufsiz;
3557 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3558 while (buf < ebuf && b->ptr < eptr) {
3560 if ((b->ptr + 2) > eptr) {
3568 *(b->ptr)++ = 0xd; /* CR */
3569 *(b->ptr)++ = 0xa; /* LF */
3571 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3581 if (b->ptr >= eptr) {
3587 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3589 return (buf - (STDCHAR *) vbuf);
3594 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3596 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3601 return PerlIOBuf_flush(aTHX_ f);
3604 PerlIO_funcs PerlIO_crlf = {
3607 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3609 PerlIOBase_noop_ok, /* popped */
3614 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3616 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3617 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3625 PerlIOBase_clearerr,
3626 PerlIOBase_setlinebuf,
3631 PerlIOCrlf_set_ptrcnt,
3635 /*--------------------------------------------------------------------------------------*/
3637 * mmap as "buffer" layer
3641 PerlIOBuf base; /* PerlIOBuf stuff */
3642 Mmap_t mptr; /* Mapped address */
3643 Size_t len; /* mapped length */
3644 STDCHAR *bbuf; /* malloced buffer if map fails */
3647 static size_t page_size = 0;
3650 PerlIOMmap_map(pTHX_ PerlIO *f)
3652 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3653 IV flags = PerlIOBase(f)->flags;
3657 if (flags & PERLIO_F_CANREAD) {
3658 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3659 int fd = PerlIO_fileno(f);
3661 code = Fstat(fd, &st);
3662 if (code == 0 && S_ISREG(st.st_mode)) {
3663 SSize_t len = st.st_size - b->posn;
3667 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3669 SETERRNO(0, SS$_NORMAL);
3670 # ifdef _SC_PAGESIZE
3671 page_size = sysconf(_SC_PAGESIZE);
3673 page_size = sysconf(_SC_PAGE_SIZE);
3675 if ((long) page_size < 0) {
3680 (void) SvUPGRADE(error, SVt_PV);
3681 msg = SvPVx(error, n_a);
3682 Perl_croak(aTHX_ "panic: sysconf: %s",
3687 "panic: sysconf: pagesize unknown");
3691 # ifdef HAS_GETPAGESIZE
3692 page_size = getpagesize();
3694 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3695 page_size = PAGESIZE; /* compiletime, bad */
3699 if ((IV) page_size <= 0)
3700 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3705 * This is a hack - should never happen - open should
3708 b->posn = PerlIO_tell(PerlIONext(f));
3710 posn = (b->posn / page_size) * page_size;
3711 len = st.st_size - posn;
3712 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3713 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3714 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3715 madvise(m->mptr, len, MADV_SEQUENTIAL);
3717 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3718 madvise(m->mptr, len, MADV_WILLNEED);
3720 PerlIOBase(f)->flags =
3721 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3722 b->end = ((STDCHAR *) m->mptr) + len;
3723 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3732 PerlIOBase(f)->flags =
3733 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3735 b->ptr = b->end = b->ptr;
3744 PerlIOMmap_unmap(pTHX_ PerlIO *f)
3746 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3747 PerlIOBuf *b = &m->base;
3751 code = munmap(m->mptr, m->len);
3755 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3758 b->ptr = b->end = b->buf;
3759 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3765 PerlIOMmap_get_base(pTHX_ PerlIO *f)
3767 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3768 PerlIOBuf *b = &m->base;
3769 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3771 * Already have a readbuffer in progress
3777 * We have a write buffer or flushed PerlIOBuf read buffer
3779 m->bbuf = b->buf; /* save it in case we need it again */
3780 b->buf = NULL; /* Clear to trigger below */
3783 PerlIOMmap_map(aTHX_ f); /* Try and map it */
3786 * Map did not work - recover PerlIOBuf buffer if we have one
3791 b->ptr = b->end = b->buf;
3794 return PerlIOBuf_get_base(aTHX_ f);
3798 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3800 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3801 PerlIOBuf *b = &m->base;
3802 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3804 if (b->ptr && (b->ptr - count) >= b->buf
3805 && memEQ(b->ptr - count, vbuf, count)) {
3807 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3812 * Loose the unwritable mapped buffer
3816 * If flush took the "buffer" see if we have one from before
3818 if (!b->buf && m->bbuf)
3821 PerlIOBuf_get_base(aTHX_ f);
3825 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3829 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3831 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3832 PerlIOBuf *b = &m->base;
3833 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3835 * No, or wrong sort of, buffer
3838 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3842 * If unmap took the "buffer" see if we have one from before
3844 if (!b->buf && m->bbuf)
3847 PerlIOBuf_get_base(aTHX_ f);
3851 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3855 PerlIOMmap_flush(pTHX_ PerlIO *f)
3857 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3858 PerlIOBuf *b = &m->base;
3859 IV code = PerlIOBuf_flush(aTHX_ f);
3861 * Now we are "synced" at PerlIOBuf level
3868 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3873 * We seem to have a PerlIOBuf buffer which was not mapped
3874 * remember it in case we need one later
3883 PerlIOMmap_fill(pTHX_ PerlIO *f)
3885 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3886 IV code = PerlIO_flush(f);
3887 if (code == 0 && !b->buf) {
3888 code = PerlIOMmap_map(aTHX_ f);
3890 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3891 code = PerlIOBuf_fill(aTHX_ f);
3897 PerlIOMmap_close(pTHX_ PerlIO *f)
3899 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3900 PerlIOBuf *b = &m->base;
3901 IV code = PerlIO_flush(f);
3905 b->ptr = b->end = b->buf;
3907 if (PerlIOBuf_close(aTHX_ f) != 0)
3913 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3915 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3919 PerlIO_funcs PerlIO_mmap = {
3939 PerlIOBase_clearerr,
3940 PerlIOBase_setlinebuf,
3941 PerlIOMmap_get_base,
3945 PerlIOBuf_set_ptrcnt,
3948 #endif /* HAS_MMAP */
3951 Perl_PerlIO_stdin(pTHX)
3954 PerlIO_stdstreams(aTHX);
3956 return &PL_perlio[1];
3960 Perl_PerlIO_stdout(pTHX)
3963 PerlIO_stdstreams(aTHX);
3965 return &PL_perlio[2];
3969 Perl_PerlIO_stderr(pTHX)
3972 PerlIO_stdstreams(aTHX);
3974 return &PL_perlio[3];
3977 /*--------------------------------------------------------------------------------------*/
3980 PerlIO_getname(PerlIO *f, char *buf)
3985 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3987 name = fgetname(stdio, buf);
3989 Perl_croak(aTHX_ "Don't know how to get file name");
3995 /*--------------------------------------------------------------------------------------*/
3997 * Functions which can be called on any kind of PerlIO implemented in
4001 #undef PerlIO_fdopen
4003 PerlIO_fdopen(int fd, const char *mode)
4006 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4011 PerlIO_open(const char *path, const char *mode)
4014 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4015 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4018 #undef Perlio_reopen
4020 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4023 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4024 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4029 PerlIO_getc(PerlIO *f)
4033 SSize_t count = PerlIO_read(f, buf, 1);
4035 return (unsigned char) buf[0];
4040 #undef PerlIO_ungetc
4042 PerlIO_ungetc(PerlIO *f, int ch)
4047 if (PerlIO_unread(f, &buf, 1) == 1)
4055 PerlIO_putc(PerlIO *f, int ch)
4059 return PerlIO_write(f, &buf, 1);
4064 PerlIO_puts(PerlIO *f, const char *s)
4067 STRLEN len = strlen(s);
4068 return PerlIO_write(f, s, len);
4071 #undef PerlIO_rewind
4073 PerlIO_rewind(PerlIO *f)
4076 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4080 #undef PerlIO_vprintf
4082 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4085 SV *sv = newSVpvn("", 0);
4091 Perl_va_copy(ap, apc);
4092 sv_vcatpvf(sv, fmt, &apc);
4094 sv_vcatpvf(sv, fmt, &ap);
4097 wrote = PerlIO_write(f, s, len);
4102 #undef PerlIO_printf
4104 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4109 result = PerlIO_vprintf(f, fmt, ap);
4114 #undef PerlIO_stdoutf
4116 PerlIO_stdoutf(const char *fmt, ...)
4122 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4127 #undef PerlIO_tmpfile
4129 PerlIO_tmpfile(void)
4132 * I have no idea how portable mkstemp() is ...
4134 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4137 FILE *stdio = PerlSIO_tmpfile();
4140 PerlIOSelf(PerlIO_push
4141 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4142 "w+", Nullsv), PerlIOStdio);
4148 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4149 int fd = mkstemp(SvPVX(sv));
4152 f = PerlIO_fdopen(fd, "w+");
4154 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4156 PerlLIO_unlink(SvPVX(sv));
4166 #endif /* USE_SFIO */
4167 #endif /* PERLIO_IS_STDIO */
4169 /*======================================================================================*/
4171 * Now some functions in terms of above which may be needed even if we are
4172 * not in true PerlIO mode
4176 #undef PerlIO_setpos
4178 PerlIO_setpos(PerlIO *f, SV *pos)
4183 Off_t *posn = (Off_t *) SvPV(pos, len);
4184 if (f && len == sizeof(Off_t))
4185 return PerlIO_seek(f, *posn, SEEK_SET);
4187 SETERRNO(EINVAL, SS$_IVCHAN);
4191 #undef PerlIO_setpos
4193 PerlIO_setpos(PerlIO *f, SV *pos)
4198 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4199 if (f && len == sizeof(Fpos_t)) {
4200 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4201 return fsetpos64(f, fpos);
4203 return fsetpos(f, fpos);
4207 SETERRNO(EINVAL, SS$_IVCHAN);
4213 #undef PerlIO_getpos
4215 PerlIO_getpos(PerlIO *f, SV *pos)
4218 Off_t posn = PerlIO_tell(f);
4219 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4220 return (posn == (Off_t) - 1) ? -1 : 0;
4223 #undef PerlIO_getpos
4225 PerlIO_getpos(PerlIO *f, SV *pos)
4230 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4231 code = fgetpos64(f, &fpos);
4233 code = fgetpos(f, &fpos);
4235 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4240 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4243 vprintf(char *pat, char *args)
4245 _doprnt(pat, args, stdout);
4246 return 0; /* wrong, but perl doesn't use the return
4251 vfprintf(FILE *fd, char *pat, char *args)
4253 _doprnt(pat, args, fd);
4254 return 0; /* wrong, but perl doesn't use the return
4260 #ifndef PerlIO_vsprintf
4262 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4264 int val = vsprintf(s, fmt, ap);
4266 if (strlen(s) >= (STRLEN) n) {
4268 (void) PerlIO_puts(Perl_error_log,
4269 "panic: sprintf overflow - memory corrupted!\n");
4277 #ifndef PerlIO_sprintf
4279 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4284 result = PerlIO_vsprintf(s, n, fmt, ap);