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)
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
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$_IVCHAN);
1107 Perl_PerlIO_close(pTHX_ PerlIO *f)
1111 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1113 PerlIO_pop(aTHX_ f);
1120 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1123 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1125 SETERRNO(EBADF, SS$_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;
1252 * This is "reopen" - it is not tested as perl does not use it
1256 layera = PerlIO_list_alloc(aTHX);
1259 (l->tab->Getarg) ? (*l->tab->
1260 Getarg) (aTHX_ &l, NULL, 0) : &PL_sv_undef;
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)
1495 return (PerlIOBase(f)->tab->Get_base != NULL);
1501 PerlIO_fast_gets(PerlIO *f)
1503 if (f && *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)
1514 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1515 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1521 PerlIO_canset_cnt(PerlIO *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 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1550 if (tab->Get_ptr == NULL)
1552 return (*tab->Get_ptr) (aTHX_ f);
1556 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1558 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1559 if (tab->Get_cnt == NULL)
1561 return (*tab->Get_cnt) (aTHX_ f);
1565 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1567 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1571 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1573 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1574 if (tab->Set_ptrcnt == NULL) {
1575 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1577 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1580 /*--------------------------------------------------------------------------------------*/
1582 * utf8 and raw dummy layers
1586 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1588 if (PerlIONext(f)) {
1589 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1590 PerlIO_pop(aTHX_ f);
1591 if (tab->kind & PERLIO_K_UTF8)
1592 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1594 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1600 PerlIO_funcs PerlIO_utf8 = {
1603 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1621 NULL, /* get_base */
1622 NULL, /* get_bufsiz */
1625 NULL, /* set_ptrcnt */
1628 PerlIO_funcs PerlIO_byte = {
1649 NULL, /* get_base */
1650 NULL, /* get_bufsiz */
1653 NULL, /* set_ptrcnt */
1657 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1658 IV n, const char *mode, int fd, int imode, int perm,
1659 PerlIO *old, int narg, SV **args)
1661 PerlIO_funcs *tab = PerlIO_default_btm();
1662 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1666 PerlIO_funcs PerlIO_raw = {
1687 NULL, /* get_base */
1688 NULL, /* get_bufsiz */
1691 NULL, /* set_ptrcnt */
1693 /*--------------------------------------------------------------------------------------*/
1694 /*--------------------------------------------------------------------------------------*/
1696 * "Methods" of the "base class"
1700 PerlIOBase_fileno(pTHX_ PerlIO *f)
1702 return PerlIO_fileno(PerlIONext(f));
1706 PerlIO_modestr(PerlIO *f, char *buf)
1709 IV flags = PerlIOBase(f)->flags;
1710 if (flags & PERLIO_F_APPEND) {
1712 if (flags & PERLIO_F_CANREAD) {
1716 else if (flags & PERLIO_F_CANREAD) {
1718 if (flags & PERLIO_F_CANWRITE)
1721 else if (flags & PERLIO_F_CANWRITE) {
1723 if (flags & PERLIO_F_CANREAD) {
1727 #ifdef PERLIO_USING_CRLF
1728 if (!(flags & PERLIO_F_CRLF))
1736 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1738 PerlIOl *l = PerlIOBase(f);
1740 const char *omode = mode;
1743 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1744 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1745 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1746 if (tab->Set_ptrcnt != NULL)
1747 l->flags |= PERLIO_F_FASTGETS;
1749 if (*mode == '#' || *mode == 'I')
1753 l->flags |= PERLIO_F_CANREAD;
1756 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1759 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1762 SETERRNO(EINVAL, LIB$_INVARG);
1768 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1771 l->flags &= ~PERLIO_F_CRLF;
1774 l->flags |= PERLIO_F_CRLF;
1777 SETERRNO(EINVAL, LIB$_INVARG);
1784 l->flags |= l->next->flags &
1785 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1790 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1791 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1792 l->flags, PerlIO_modestr(f, temp));
1798 PerlIOBase_popped(pTHX_ PerlIO *f)
1804 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1807 * Save the position as current head considers it
1809 Off_t old = PerlIO_tell(f);
1811 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1812 PerlIOSelf(f, PerlIOBuf)->posn = old;
1813 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1818 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1820 STDCHAR *buf = (STDCHAR *) vbuf;
1822 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1825 SSize_t avail = PerlIO_get_cnt(f);
1828 take = (count < avail) ? count : avail;
1830 STDCHAR *ptr = PerlIO_get_ptr(f);
1831 Copy(ptr, buf, take, STDCHAR);
1832 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1836 if (count > 0 && avail <= 0) {
1837 if (PerlIO_fill(f) != 0)
1841 return (buf - (STDCHAR *) vbuf);
1847 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1853 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1859 PerlIOBase_close(pTHX_ PerlIO *f)
1862 PerlIO *n = PerlIONext(f);
1863 if (PerlIO_flush(f) != 0)
1865 if (n && *n && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1867 PerlIOBase(f)->flags &=
1868 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1873 PerlIOBase_eof(pTHX_ PerlIO *f)
1876 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1882 PerlIOBase_error(pTHX_ PerlIO *f)
1885 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1891 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1894 PerlIO *n = PerlIONext(f);
1895 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1902 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
1905 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1910 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1916 return sv_dup(arg, param);
1919 return newSVsv(arg);
1922 return newSVsv(arg);
1927 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1929 PerlIO *nexto = PerlIONext(o);
1931 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1932 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
1935 PerlIO_funcs *self = PerlIOBase(o)->tab;
1938 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
1939 self->name, (void*)f, (void*)o, (void*)param);
1941 arg = (*self->Getarg)(aTHX_ o,param,flags);
1943 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1951 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
1953 perl_mutex PerlIO_mutex;
1955 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
1960 /* Place holder for stdstreams call ??? */
1962 MUTEX_INIT(&PerlIO_mutex);
1967 PerlIOUnix_refcnt_inc(int fd)
1969 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1971 MUTEX_LOCK(&PerlIO_mutex);
1973 PerlIO_fd_refcnt[fd]++;
1974 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
1976 MUTEX_UNLOCK(&PerlIO_mutex);
1982 PerlIOUnix_refcnt_dec(int fd)
1985 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
1987 MUTEX_LOCK(&PerlIO_mutex);
1989 cnt = --PerlIO_fd_refcnt[fd];
1990 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
1992 MUTEX_UNLOCK(&PerlIO_mutex);
1999 PerlIO_cleanup(pTHX)
2003 PerlIO_debug("Cleanup %p\n",aTHX);
2005 /* Raise STDIN..STDERR refcount so we don't close them */
2006 for (i=0; i < 3; i++)
2007 PerlIOUnix_refcnt_inc(i);
2008 PerlIO_cleantable(aTHX_ &PL_perlio);
2009 /* Restore STDIN..STDERR refcount */
2010 for (i=0; i < 3; i++)
2011 PerlIOUnix_refcnt_dec(i);
2016 /*--------------------------------------------------------------------------------------*/
2018 * Bottom-most level for UNIX-like case
2022 struct _PerlIO base; /* The generic part */
2023 int fd; /* UNIX like file descriptor */
2024 int oflags; /* open/fcntl flags */
2028 PerlIOUnix_oflags(const char *mode)
2031 if (*mode == 'I' || *mode == '#')
2036 if (*++mode == '+') {
2043 oflags = O_CREAT | O_TRUNC;
2044 if (*++mode == '+') {
2053 oflags = O_CREAT | O_APPEND;
2054 if (*++mode == '+') {
2067 else if (*mode == 't') {
2069 oflags &= ~O_BINARY;
2073 * Always open in binary mode
2076 if (*mode || oflags == -1) {
2077 SETERRNO(EINVAL, LIB$_INVARG);
2084 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2086 return PerlIOSelf(f, PerlIOUnix)->fd;
2090 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2092 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2093 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2094 if (*PerlIONext(f)) {
2095 s->fd = PerlIO_fileno(PerlIONext(f));
2097 * XXX could (or should) we retrieve the oflags from the open file
2098 * handle rather than believing the "mode" we are passed in? XXX
2099 * Should the value on NULL mode be 0 or -1?
2101 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2103 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2108 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2109 IV n, const char *mode, int fd, int imode,
2110 int perm, PerlIO *f, int narg, SV **args)
2113 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2114 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2117 char *path = SvPV_nolen(*args);
2121 imode = PerlIOUnix_oflags(mode);
2125 fd = PerlLIO_open3(path, imode, perm);
2133 f = PerlIO_allocate(aTHX);
2134 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2138 s = PerlIOSelf(f, PerlIOUnix);
2141 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2142 PerlIOUnix_refcnt_inc(fd);
2148 * FIXME: pop layers ???
2156 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2158 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2160 if (flags & PERLIO_DUP_FD) {
2161 fd = PerlLIO_dup(fd);
2163 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2164 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2166 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2167 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2169 PerlIOUnix_refcnt_inc(fd);
2178 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2180 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2181 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2184 SSize_t len = PerlLIO_read(fd, vbuf, count);
2185 if (len >= 0 || errno != EINTR) {
2187 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2188 else if (len == 0 && count != 0)
2189 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2197 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2199 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2201 SSize_t len = PerlLIO_write(fd, vbuf, count);
2202 if (len >= 0 || errno != EINTR) {
2204 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2212 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2215 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2216 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2217 return (new == (Off_t) - 1) ? -1 : 0;
2221 PerlIOUnix_tell(pTHX_ PerlIO *f)
2223 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2228 PerlIOUnix_close(pTHX_ PerlIO *f)
2230 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2232 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2233 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2234 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2239 SETERRNO(EBADF,SS$_IVCHAN);
2242 while (PerlLIO_close(fd) != 0) {
2243 if (errno != EINTR) {
2250 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2255 PerlIO_funcs PerlIO_unix = {
2271 PerlIOBase_noop_ok, /* flush */
2272 PerlIOBase_noop_fail, /* fill */
2275 PerlIOBase_clearerr,
2276 PerlIOBase_setlinebuf,
2277 NULL, /* get_base */
2278 NULL, /* get_bufsiz */
2281 NULL, /* set_ptrcnt */
2284 /*--------------------------------------------------------------------------------------*/
2290 struct _PerlIO base;
2291 FILE *stdio; /* The stream */
2295 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2297 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2301 PerlIOStdio_mode(const char *mode, char *tmode)
2307 #ifdef PERLIO_USING_CRLF
2315 * This isn't used yet ...
2318 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2320 if (*PerlIONext(f)) {
2321 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2324 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2325 PerlIOStdio_mode(mode, tmode));
2331 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2335 PerlIO_importFILE(FILE *stdio, int fl)
2341 PerlIOSelf(PerlIO_push
2342 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2343 "r+", Nullsv), PerlIOStdio);
2350 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2351 IV n, const char *mode, int fd, int imode,
2352 int perm, PerlIO *f, int narg, SV **args)
2356 char *path = SvPV_nolen(*args);
2357 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2359 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2360 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2365 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2370 char *path = SvPV_nolen(*args);
2373 fd = PerlLIO_open3(path, imode, perm);
2376 FILE *stdio = PerlSIO_fopen(path, mode);
2379 PerlIOSelf(PerlIO_push
2380 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2381 (mode = PerlIOStdio_mode(mode, tmode)),
2385 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2400 stdio = PerlSIO_stdin;
2403 stdio = PerlSIO_stdout;
2406 stdio = PerlSIO_stderr;
2411 stdio = PerlSIO_fdopen(fd, mode =
2412 PerlIOStdio_mode(mode, tmode));
2416 PerlIOSelf(PerlIO_push
2417 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2418 mode, PerlIOArg), PerlIOStdio);
2420 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2429 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2431 /* This assumes no layers underneath - which is what
2432 happens, but is not how I remember it. NI-S 2001/10/16
2434 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2435 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2436 if (flags & PERLIO_DUP_FD) {
2437 int fd = PerlLIO_dup(fileno(stdio));
2440 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2443 /* FIXME: To avoid messy error recovery if dup fails
2444 re-use the existing stdio as though flag was not set
2448 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2449 PerlIOUnix_refcnt_inc(fileno(stdio));
2455 PerlIOStdio_close(pTHX_ PerlIO *f)
2457 #ifdef SOCKS5_VERSION_NAME
2459 Sock_size_t optlen = sizeof(int);
2461 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2462 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2463 /* Do not close it but do flush any buffers */
2468 #ifdef SOCKS5_VERSION_NAME
2470 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2472 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2474 PerlSIO_fclose(stdio)
2483 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2485 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2488 STDCHAR *buf = (STDCHAR *) vbuf;
2490 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2491 * stdio does not do that for fread()
2493 int ch = PerlSIO_fgetc(s);
2500 got = PerlSIO_fread(vbuf, 1, count, s);
2505 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2507 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2508 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2511 int ch = *buf-- & 0xff;
2512 if (PerlSIO_ungetc(ch, s) != ch)
2521 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2523 return PerlSIO_fwrite(vbuf, 1, count,
2524 PerlIOSelf(f, PerlIOStdio)->stdio);
2528 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2530 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2531 return PerlSIO_fseek(stdio, offset, whence);
2535 PerlIOStdio_tell(pTHX_ PerlIO *f)
2537 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2538 return PerlSIO_ftell(stdio);
2542 PerlIOStdio_flush(pTHX_ PerlIO *f)
2544 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2545 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2546 return PerlSIO_fflush(stdio);
2551 * FIXME: This discards ungetc() and pre-read stuff which is not
2552 * right if this is just a "sync" from a layer above Suspect right
2553 * design is to do _this_ but not have layer above flush this
2554 * layer read-to-read
2557 * Not writeable - sync by attempting a seek
2560 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2568 PerlIOStdio_fill(pTHX_ PerlIO *f)
2570 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2573 * fflush()ing read-only streams can cause trouble on some stdio-s
2575 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2576 if (PerlSIO_fflush(stdio) != 0)
2579 c = PerlSIO_fgetc(stdio);
2580 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2586 PerlIOStdio_eof(pTHX_ PerlIO *f)
2588 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2592 PerlIOStdio_error(pTHX_ PerlIO *f)
2594 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2598 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2600 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2604 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2606 #ifdef HAS_SETLINEBUF
2607 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2609 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2615 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2617 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2618 return (STDCHAR*)PerlSIO_get_base(stdio);
2622 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2624 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2625 return PerlSIO_get_bufsiz(stdio);
2629 #ifdef USE_STDIO_PTR
2631 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2633 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2634 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2638 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2640 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2641 return PerlSIO_get_cnt(stdio);
2645 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2647 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2649 #ifdef STDIO_PTR_LVALUE
2650 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2651 #ifdef STDIO_PTR_LVAL_SETS_CNT
2652 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2653 assert(PerlSIO_get_cnt(stdio) == (cnt));
2656 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2658 * Setting ptr _does_ change cnt - we are done
2662 #else /* STDIO_PTR_LVALUE */
2664 #endif /* STDIO_PTR_LVALUE */
2667 * Now (or only) set cnt
2669 #ifdef STDIO_CNT_LVALUE
2670 PerlSIO_set_cnt(stdio, cnt);
2671 #else /* STDIO_CNT_LVALUE */
2672 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2673 PerlSIO_set_ptr(stdio,
2674 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2676 #else /* STDIO_PTR_LVAL_SETS_CNT */
2678 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2679 #endif /* STDIO_CNT_LVALUE */
2684 PerlIO_funcs PerlIO_stdio = {
2686 sizeof(PerlIOStdio),
2704 PerlIOStdio_clearerr,
2705 PerlIOStdio_setlinebuf,
2707 PerlIOStdio_get_base,
2708 PerlIOStdio_get_bufsiz,
2713 #ifdef USE_STDIO_PTR
2714 PerlIOStdio_get_ptr,
2715 PerlIOStdio_get_cnt,
2716 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2717 PerlIOStdio_set_ptrcnt
2718 #else /* STDIO_PTR_LVALUE */
2720 #endif /* STDIO_PTR_LVALUE */
2721 #else /* USE_STDIO_PTR */
2725 #endif /* USE_STDIO_PTR */
2729 PerlIO_exportFILE(PerlIO *f, int fl)
2734 stdio = fdopen(PerlIO_fileno(f), "r+");
2737 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2745 PerlIO_findFILE(PerlIO *f)
2749 if (l->tab == &PerlIO_stdio) {
2750 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2753 l = *PerlIONext(&l);
2755 return PerlIO_exportFILE(f, 0);
2759 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2763 /*--------------------------------------------------------------------------------------*/
2765 * perlio buffer layer
2769 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2771 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2772 int fd = PerlIO_fileno(f);
2774 if (fd >= 0 && PerlLIO_isatty(fd)) {
2775 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2777 posn = PerlIO_tell(PerlIONext(f));
2778 if (posn != (Off_t) - 1) {
2781 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2785 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2786 IV n, const char *mode, int fd, int imode, int perm,
2787 PerlIO *f, int narg, SV **args)
2790 PerlIO *next = PerlIONext(f);
2792 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2794 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2797 || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
2803 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2811 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2814 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2816 * if push fails during open, open fails. close will pop us.
2821 fd = PerlIO_fileno(f);
2822 #ifdef PERLIO_USING_CRLF
2824 * do something about failing setmode()? --jhi
2826 PerlLIO_setmode(fd, O_BINARY);
2828 if (init && fd == 2) {
2830 * Initial stderr is unbuffered
2832 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2841 * This "flush" is akin to sfio's sync in that it handles files in either
2842 * read or write state
2845 PerlIOBuf_flush(pTHX_ PerlIO *f)
2847 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2849 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2851 * write() the buffer
2853 STDCHAR *buf = b->buf;
2855 PerlIO *n = PerlIONext(f);
2856 while (p < b->ptr) {
2857 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2861 else if (count < 0 || PerlIO_error(n)) {
2862 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2867 b->posn += (p - buf);
2869 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2870 STDCHAR *buf = PerlIO_get_base(f);
2872 * Note position change
2874 b->posn += (b->ptr - buf);
2875 if (b->ptr < b->end) {
2877 * We did not consume all of it
2879 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2880 b->posn = PerlIO_tell(PerlIONext(f));
2884 b->ptr = b->end = b->buf;
2885 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2887 * FIXME: Is this right for read case ?
2889 if (PerlIO_flush(PerlIONext(f)) != 0)
2895 PerlIOBuf_fill(pTHX_ PerlIO *f)
2897 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2898 PerlIO *n = PerlIONext(f);
2901 * FIXME: doing the down-stream flush is a bad idea if it causes
2902 * pre-read data in stdio buffer to be discarded but this is too
2903 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2904 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2906 if (PerlIO_flush(f) != 0)
2908 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2909 PerlIOBase_flush_linebuf(aTHX);
2912 PerlIO_get_base(f); /* allocate via vtable */
2914 b->ptr = b->end = b->buf;
2915 if (PerlIO_fast_gets(n)) {
2917 * Layer below is also buffered We do _NOT_ want to call its
2918 * ->Read() because that will loop till it gets what we asked for
2919 * which may hang on a pipe etc. Instead take anything it has to
2920 * hand, or ask it to fill _once_.
2922 avail = PerlIO_get_cnt(n);
2924 avail = PerlIO_fill(n);
2926 avail = PerlIO_get_cnt(n);
2928 if (!PerlIO_error(n) && PerlIO_eof(n))
2933 STDCHAR *ptr = PerlIO_get_ptr(n);
2934 SSize_t cnt = avail;
2935 if (avail > b->bufsiz)
2937 Copy(ptr, b->buf, avail, STDCHAR);
2938 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2942 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2946 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2948 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2951 b->end = b->buf + avail;
2952 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2957 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2959 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2963 return PerlIOBase_read(aTHX_ f, vbuf, count);
2969 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2971 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2972 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2975 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2980 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2982 * Buffer is already a read buffer, we can overwrite any chars
2983 * which have been read back to buffer start
2985 avail = (b->ptr - b->buf);
2989 * Buffer is idle, set it up so whole buffer is available for
2993 b->end = b->buf + avail;
2995 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2997 * Buffer extends _back_ from where we are now
2999 b->posn -= b->bufsiz;
3001 if (avail > (SSize_t) count) {
3003 * If we have space for more than count, just move count
3011 * In simple stdio-like ungetc() case chars will be already
3014 if (buf != b->ptr) {
3015 Copy(buf, b->ptr, avail, STDCHAR);
3019 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3026 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3029 const STDCHAR *buf = (const STDCHAR *) vbuf;
3033 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3036 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3037 if ((SSize_t) count < avail)
3039 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3040 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3055 Copy(buf, b->ptr, avail, STDCHAR);
3062 if (b->ptr >= (b->buf + b->bufsiz))
3065 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3071 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3074 if ((code = PerlIO_flush(f)) == 0) {
3075 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3076 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3077 code = PerlIO_seek(PerlIONext(f), offset, whence);
3079 b->posn = PerlIO_tell(PerlIONext(f));
3086 PerlIOBuf_tell(pTHX_ PerlIO *f)
3088 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3090 * b->posn is file position where b->buf was read, or will be written
3092 Off_t posn = b->posn;
3095 * If buffer is valid adjust position by amount in buffer
3097 posn += (b->ptr - b->buf);
3103 PerlIOBuf_close(pTHX_ PerlIO *f)
3105 IV code = PerlIOBase_close(aTHX_ f);
3106 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3107 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3111 b->ptr = b->end = b->buf;
3112 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3117 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3119 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3126 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3128 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3131 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3132 return (b->end - b->ptr);
3137 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3139 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3144 Newz('B',b->buf,b->bufsiz, STDCHAR);
3146 b->buf = (STDCHAR *) & b->oneword;
3147 b->bufsiz = sizeof(b->oneword);
3156 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3158 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3161 return (b->end - b->buf);
3165 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3167 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3171 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3172 assert(PerlIO_get_cnt(f) == cnt);
3173 assert(b->ptr >= b->buf);
3175 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3179 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3181 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3186 PerlIO_funcs PerlIO_perlio = {
3206 PerlIOBase_clearerr,
3207 PerlIOBase_setlinebuf,
3212 PerlIOBuf_set_ptrcnt,
3215 /*--------------------------------------------------------------------------------------*/
3217 * Temp layer to hold unread chars when cannot do it any other way
3221 PerlIOPending_fill(pTHX_ PerlIO *f)
3224 * Should never happen
3231 PerlIOPending_close(pTHX_ PerlIO *f)
3234 * A tad tricky - flush pops us, then we close new top
3237 return PerlIO_close(f);
3241 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3244 * A tad tricky - flush pops us, then we seek new top
3247 return PerlIO_seek(f, offset, whence);
3252 PerlIOPending_flush(pTHX_ PerlIO *f)
3254 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3255 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3259 PerlIO_pop(aTHX_ f);
3264 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3270 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3275 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3277 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3278 PerlIOl *l = PerlIOBase(f);
3280 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3281 * etc. get muddled when it changes mid-string when we auto-pop.
3283 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3284 (PerlIOBase(PerlIONext(f))->
3285 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3290 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3292 SSize_t avail = PerlIO_get_cnt(f);
3297 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3298 if (got >= 0 && got < count) {
3300 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3301 if (more >= 0 || got == 0)
3307 PerlIO_funcs PerlIO_pending = {
3311 PerlIOPending_pushed,
3322 PerlIOPending_close,
3323 PerlIOPending_flush,
3327 PerlIOBase_clearerr,
3328 PerlIOBase_setlinebuf,
3333 PerlIOPending_set_ptrcnt,
3338 /*--------------------------------------------------------------------------------------*/
3340 * crlf - translation On read translate CR,LF to "\n" we do this by
3341 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3342 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3346 PerlIOBuf base; /* PerlIOBuf stuff */
3347 STDCHAR *nl; /* Position of crlf we "lied" about in the
3352 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3355 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3356 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3358 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3359 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3360 PerlIOBase(f)->flags);
3367 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3369 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3374 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3375 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3377 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3378 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3380 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3385 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3386 b->end = b->ptr = b->buf + b->bufsiz;
3387 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3388 b->posn -= b->bufsiz;
3390 while (count > 0 && b->ptr > b->buf) {
3393 if (b->ptr - 2 >= b->buf) {
3416 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3418 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3421 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3422 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3423 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3424 STDCHAR *nl = b->ptr;
3426 while (nl < b->end && *nl != 0xd)
3428 if (nl < b->end && *nl == 0xd) {
3430 if (nl + 1 < b->end) {
3437 * Not CR,LF but just CR
3445 * Blast - found CR as last char in buffer
3450 * They may not care, defer work as long as
3454 return (nl - b->ptr);
3458 b->ptr++; /* say we have read it as far as
3459 * flush() is concerned */
3460 b->buf++; /* Leave space in front of buffer */
3461 b->bufsiz--; /* Buffer is thus smaller */
3462 code = PerlIO_fill(f); /* Fetch some more */
3463 b->bufsiz++; /* Restore size for next time */
3464 b->buf--; /* Point at space */
3465 b->ptr = nl = b->buf; /* Which is what we hand
3467 b->posn--; /* Buffer starts here */
3468 *nl = 0xd; /* Fill in the CR */
3470 goto test; /* fill() call worked */
3472 * CR at EOF - just fall through
3474 /* Should we clear EOF though ??? */
3479 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3485 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3487 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3488 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3489 IV flags = PerlIOBase(f)->flags;
3495 if (ptr == b->end && *c->nl == 0xd) {
3496 /* Defered CR at end of buffer case - we lied about count */
3507 * Test code - delete when it works ...
3509 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3510 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3511 /* Defered CR at end of buffer case - we lied about count */
3517 Perl_warn(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3518 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3525 * They have taken what we lied about
3533 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3537 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3539 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3540 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3542 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3543 const STDCHAR *buf = (const STDCHAR *) vbuf;
3544 const STDCHAR *ebuf = buf + count;
3547 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3549 while (buf < ebuf) {
3550 STDCHAR *eptr = b->buf + b->bufsiz;
3551 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3552 while (buf < ebuf && b->ptr < eptr) {
3554 if ((b->ptr + 2) > eptr) {
3562 *(b->ptr)++ = 0xd; /* CR */
3563 *(b->ptr)++ = 0xa; /* LF */
3565 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3575 if (b->ptr >= eptr) {
3581 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3583 return (buf - (STDCHAR *) vbuf);
3588 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3590 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3595 return PerlIOBuf_flush(aTHX_ f);
3598 PerlIO_funcs PerlIO_crlf = {
3601 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3603 PerlIOBase_noop_ok, /* popped */
3608 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3610 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3611 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3619 PerlIOBase_clearerr,
3620 PerlIOBase_setlinebuf,
3625 PerlIOCrlf_set_ptrcnt,
3629 /*--------------------------------------------------------------------------------------*/
3631 * mmap as "buffer" layer
3635 PerlIOBuf base; /* PerlIOBuf stuff */
3636 Mmap_t mptr; /* Mapped address */
3637 Size_t len; /* mapped length */
3638 STDCHAR *bbuf; /* malloced buffer if map fails */
3641 static size_t page_size = 0;
3644 PerlIOMmap_map(pTHX_ PerlIO *f)
3646 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3647 IV flags = PerlIOBase(f)->flags;
3651 if (flags & PERLIO_F_CANREAD) {
3652 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3653 int fd = PerlIO_fileno(f);
3655 code = Fstat(fd, &st);
3656 if (code == 0 && S_ISREG(st.st_mode)) {
3657 SSize_t len = st.st_size - b->posn;
3661 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3663 SETERRNO(0, SS$_NORMAL);
3664 # ifdef _SC_PAGESIZE
3665 page_size = sysconf(_SC_PAGESIZE);
3667 page_size = sysconf(_SC_PAGE_SIZE);
3669 if ((long) page_size < 0) {
3674 (void) SvUPGRADE(error, SVt_PV);
3675 msg = SvPVx(error, n_a);
3676 Perl_croak(aTHX_ "panic: sysconf: %s",
3681 "panic: sysconf: pagesize unknown");
3685 # ifdef HAS_GETPAGESIZE
3686 page_size = getpagesize();
3688 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3689 page_size = PAGESIZE; /* compiletime, bad */
3693 if ((IV) page_size <= 0)
3694 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3699 * This is a hack - should never happen - open should
3702 b->posn = PerlIO_tell(PerlIONext(f));
3704 posn = (b->posn / page_size) * page_size;
3705 len = st.st_size - posn;
3706 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3707 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3708 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3709 madvise(m->mptr, len, MADV_SEQUENTIAL);
3711 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3712 madvise(m->mptr, len, MADV_WILLNEED);
3714 PerlIOBase(f)->flags =
3715 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3716 b->end = ((STDCHAR *) m->mptr) + len;
3717 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3726 PerlIOBase(f)->flags =
3727 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3729 b->ptr = b->end = b->ptr;
3738 PerlIOMmap_unmap(pTHX_ PerlIO *f)
3740 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3741 PerlIOBuf *b = &m->base;
3745 code = munmap(m->mptr, m->len);
3749 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3752 b->ptr = b->end = b->buf;
3753 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3759 PerlIOMmap_get_base(pTHX_ PerlIO *f)
3761 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3762 PerlIOBuf *b = &m->base;
3763 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3765 * Already have a readbuffer in progress
3771 * We have a write buffer or flushed PerlIOBuf read buffer
3773 m->bbuf = b->buf; /* save it in case we need it again */
3774 b->buf = NULL; /* Clear to trigger below */
3777 PerlIOMmap_map(aTHX_ f); /* Try and map it */
3780 * Map did not work - recover PerlIOBuf buffer if we have one
3785 b->ptr = b->end = b->buf;
3788 return PerlIOBuf_get_base(aTHX_ f);
3792 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3794 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3795 PerlIOBuf *b = &m->base;
3796 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3798 if (b->ptr && (b->ptr - count) >= b->buf
3799 && memEQ(b->ptr - count, vbuf, count)) {
3801 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3806 * Loose the unwritable mapped buffer
3810 * If flush took the "buffer" see if we have one from before
3812 if (!b->buf && m->bbuf)
3815 PerlIOBuf_get_base(aTHX_ f);
3819 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3823 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3825 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3826 PerlIOBuf *b = &m->base;
3827 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3829 * No, or wrong sort of, buffer
3832 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3836 * If unmap took the "buffer" see if we have one from before
3838 if (!b->buf && m->bbuf)
3841 PerlIOBuf_get_base(aTHX_ f);
3845 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3849 PerlIOMmap_flush(pTHX_ PerlIO *f)
3851 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3852 PerlIOBuf *b = &m->base;
3853 IV code = PerlIOBuf_flush(aTHX_ f);
3855 * Now we are "synced" at PerlIOBuf level
3862 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3867 * We seem to have a PerlIOBuf buffer which was not mapped
3868 * remember it in case we need one later
3877 PerlIOMmap_fill(pTHX_ PerlIO *f)
3879 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3880 IV code = PerlIO_flush(f);
3881 if (code == 0 && !b->buf) {
3882 code = PerlIOMmap_map(aTHX_ f);
3884 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3885 code = PerlIOBuf_fill(aTHX_ f);
3891 PerlIOMmap_close(pTHX_ PerlIO *f)
3893 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3894 PerlIOBuf *b = &m->base;
3895 IV code = PerlIO_flush(f);
3899 b->ptr = b->end = b->buf;
3901 if (PerlIOBuf_close(aTHX_ f) != 0)
3907 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3909 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3913 PerlIO_funcs PerlIO_mmap = {
3933 PerlIOBase_clearerr,
3934 PerlIOBase_setlinebuf,
3935 PerlIOMmap_get_base,
3939 PerlIOBuf_set_ptrcnt,
3942 #endif /* HAS_MMAP */
3945 Perl_PerlIO_stdin(pTHX)
3948 PerlIO_stdstreams(aTHX);
3950 return &PL_perlio[1];
3954 Perl_PerlIO_stdout(pTHX)
3957 PerlIO_stdstreams(aTHX);
3959 return &PL_perlio[2];
3963 Perl_PerlIO_stderr(pTHX)
3966 PerlIO_stdstreams(aTHX);
3968 return &PL_perlio[3];
3971 /*--------------------------------------------------------------------------------------*/
3974 PerlIO_getname(PerlIO *f, char *buf)
3979 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3981 name = fgetname(stdio, buf);
3983 Perl_croak(aTHX_ "Don't know how to get file name");
3989 /*--------------------------------------------------------------------------------------*/
3991 * Functions which can be called on any kind of PerlIO implemented in
3995 #undef PerlIO_fdopen
3997 PerlIO_fdopen(int fd, const char *mode)
4000 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4005 PerlIO_open(const char *path, const char *mode)
4008 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4009 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4012 #undef Perlio_reopen
4014 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4017 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4018 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4023 PerlIO_getc(PerlIO *f)
4027 SSize_t count = PerlIO_read(f, buf, 1);
4029 return (unsigned char) buf[0];
4034 #undef PerlIO_ungetc
4036 PerlIO_ungetc(PerlIO *f, int ch)
4041 if (PerlIO_unread(f, &buf, 1) == 1)
4049 PerlIO_putc(PerlIO *f, int ch)
4053 return PerlIO_write(f, &buf, 1);
4058 PerlIO_puts(PerlIO *f, const char *s)
4061 STRLEN len = strlen(s);
4062 return PerlIO_write(f, s, len);
4065 #undef PerlIO_rewind
4067 PerlIO_rewind(PerlIO *f)
4070 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4074 #undef PerlIO_vprintf
4076 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4079 SV *sv = newSVpvn("", 0);
4085 Perl_va_copy(ap, apc);
4086 sv_vcatpvf(sv, fmt, &apc);
4088 sv_vcatpvf(sv, fmt, &ap);
4091 wrote = PerlIO_write(f, s, len);
4096 #undef PerlIO_printf
4098 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4103 result = PerlIO_vprintf(f, fmt, ap);
4108 #undef PerlIO_stdoutf
4110 PerlIO_stdoutf(const char *fmt, ...)
4116 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4121 #undef PerlIO_tmpfile
4123 PerlIO_tmpfile(void)
4126 * I have no idea how portable mkstemp() is ...
4128 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4131 FILE *stdio = PerlSIO_tmpfile();
4134 PerlIOSelf(PerlIO_push
4135 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4136 "w+", Nullsv), PerlIOStdio);
4142 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4143 int fd = mkstemp(SvPVX(sv));
4146 f = PerlIO_fdopen(fd, "w+");
4148 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4150 PerlLIO_unlink(SvPVX(sv));
4160 #endif /* USE_SFIO */
4161 #endif /* PERLIO_IS_STDIO */
4163 /*======================================================================================*/
4165 * Now some functions in terms of above which may be needed even if we are
4166 * not in true PerlIO mode
4170 #undef PerlIO_setpos
4172 PerlIO_setpos(PerlIO *f, SV *pos)
4177 Off_t *posn = (Off_t *) SvPV(pos, len);
4178 if (f && len == sizeof(Off_t))
4179 return PerlIO_seek(f, *posn, SEEK_SET);
4181 SETERRNO(EINVAL, SS$_IVCHAN);
4185 #undef PerlIO_setpos
4187 PerlIO_setpos(PerlIO *f, SV *pos)
4192 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4193 if (f && len == sizeof(Fpos_t)) {
4194 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4195 return fsetpos64(f, fpos);
4197 return fsetpos(f, fpos);
4201 SETERRNO(EINVAL, SS$_IVCHAN);
4207 #undef PerlIO_getpos
4209 PerlIO_getpos(PerlIO *f, SV *pos)
4212 Off_t posn = PerlIO_tell(f);
4213 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4214 return (posn == (Off_t) - 1) ? -1 : 0;
4217 #undef PerlIO_getpos
4219 PerlIO_getpos(PerlIO *f, SV *pos)
4224 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4225 code = fgetpos64(f, &fpos);
4227 code = fgetpos(f, &fpos);
4229 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4234 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4237 vprintf(char *pat, char *args)
4239 _doprnt(pat, args, stdout);
4240 return 0; /* wrong, but perl doesn't use the return
4245 vfprintf(FILE *fd, char *pat, char *args)
4247 _doprnt(pat, args, fd);
4248 return 0; /* wrong, but perl doesn't use the return
4254 #ifndef PerlIO_vsprintf
4256 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4258 int val = vsprintf(s, fmt, ap);
4260 if (strlen(s) >= (STRLEN) n) {
4262 (void) PerlIO_puts(Perl_error_log,
4263 "panic: sprintf overflow - memory corrupted!\n");
4271 #ifndef PerlIO_sprintf
4273 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4278 result = PerlIO_vsprintf(s, n, fmt, ap);