2 * perlio.c Copyright (c) 1996-2002, 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 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
17 #ifdef PERL_IMPLICIT_SYS
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
43 #define PERL_IN_PERLIO_C
46 #ifdef PERL_IMPLICIT_CONTEXT
53 /* Call the callback or PerlIOBase, and return failure. */
54 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
55 if (PerlIOValid(f)) { \
56 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
57 if (tab && tab->callback) \
58 return (*tab->callback) args; \
60 return PerlIOBase_ ## base args; \
63 SETERRNO(EBADF, SS_IVCHAN); \
66 /* Call the callback or fail, and return failure. */
67 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
68 if (PerlIOValid(f)) { \
69 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
72 SETERRNO(EINVAL, LIB_INVARG); \
75 SETERRNO(EBADF, SS_IVCHAN); \
78 /* Call the callback or PerlIOBase, and be void. */
79 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
80 if (PerlIOValid(f)) { \
81 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
82 if (tab && tab->callback) \
83 (*tab->callback) args; \
85 PerlIOBase_ ## base args; \
88 SETERRNO(EBADF, SS_IVCHAN)
90 /* Call the callback or fail, and be void. */
91 #define Perl_PerlIO_or_fail_void(f, callback, args) \
92 if (PerlIOValid(f)) { \
93 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
94 if (tab && tab->callback) \
95 (*tab->callback) args; \
97 SETERRNO(EINVAL, LIB_INVARG); \
100 SETERRNO(EBADF, SS_IVCHAN)
103 perlsio_binmode(FILE *fp, int iotype, int mode)
106 * This used to be contents of do_binmode in doio.c
109 # if defined(atarist) || defined(__MINT__)
112 ((FILE *) fp)->_flag |= _IOBIN;
114 ((FILE *) fp)->_flag &= ~_IOBIN;
121 if (PerlLIO_setmode(fp, mode) != -1) {
123 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
125 # if defined(WIN32) && defined(__BORLANDC__)
127 * The translation mode of the stream is maintained independent of
128 * the translation mode of the fd in the Borland RTL (heavy
129 * digging through their runtime sources reveal). User has to set
130 * the mode explicitly for the stream (though they don't document
131 * this anywhere). GSAR 97-5-24
137 fp->flags &= ~_F_BIN;
145 # if defined(USEMYBINMODE)
147 if (my_binmode(fp, iotype, mode) != FALSE)
158 #define O_ACCMODE 3 /* Assume traditional implementation */
162 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
164 int result = rawmode & O_ACCMODE;
169 ptype = IoTYPE_RDONLY;
172 ptype = IoTYPE_WRONLY;
180 *writing = (result != O_RDONLY);
182 if (result == O_RDONLY) {
186 else if (rawmode & O_APPEND) {
188 if (result != O_WRONLY)
193 if (result == O_WRONLY)
200 if (rawmode & O_BINARY)
206 #ifndef PERLIO_LAYERS
208 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
210 if (!names || !*names
211 || strEQ(names, ":crlf")
212 || strEQ(names, ":raw")
213 || strEQ(names, ":bytes")
217 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
225 PerlIO_destruct(pTHX)
230 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
235 return perlsio_binmode(fp, iotype, mode);
240 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
245 #ifdef PERL_IMPLICIT_SYS
246 return PerlSIO_fdupopen(f);
249 return win32_fdupopen(f);
252 int fd = PerlLIO_dup(PerlIO_fileno(f));
255 int omode = fcntl(fd, F_GETFL);
257 omode = djgpp_get_stream_mode(f);
259 PerlIO_intmode2str(omode,mode,NULL);
260 /* the r+ is a hack */
261 return PerlIO_fdopen(fd, mode);
266 SETERRNO(EBADF, SS_IVCHAN);
276 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
280 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
281 int imode, int perm, PerlIO *old, int narg, SV **args)
285 Perl_croak(aTHX_ "More than one argument to open");
287 if (*args == &PL_sv_undef)
288 return PerlIO_tmpfile();
290 char *name = SvPV_nolen(*args);
292 fd = PerlLIO_open3(name, imode, perm);
294 return PerlIO_fdopen(fd, (char *) mode + 1);
297 return PerlIO_reopen(name, mode, old);
300 return PerlIO_open(name, mode);
305 return PerlIO_fdopen(fd, (char *) mode);
310 XS(XS_PerlIO__Layer__find)
314 Perl_croak(aTHX_ "Usage class->find(name[,load])");
316 char *name = SvPV_nolen(ST(1));
317 ST(0) = (strEQ(name, "crlf")
318 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
325 Perl_boot_core_PerlIO(pTHX)
327 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
333 #ifdef PERLIO_IS_STDIO
339 * Does nothing (yet) except force this file to be included in perl
340 * binary. That allows this file to force inclusion of other functions
341 * that may be required by loadable extensions e.g. for
342 * FileHandle::tmpfile
346 #undef PerlIO_tmpfile
353 #else /* PERLIO_IS_STDIO */
361 * This section is just to make sure these functions get pulled in from
365 #undef PerlIO_tmpfile
376 * Force this file to be included in perl binary. Which allows this
377 * file to force inclusion of other functions that may be required by
378 * loadable extensions e.g. for FileHandle::tmpfile
382 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
383 * results in a lot of lseek()s to regular files and lot of small
386 sfset(sfstdout, SF_SHARE, 0);
389 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
391 PerlIO_importFILE(FILE *stdio, const char *mode)
393 int fd = fileno(stdio);
394 if (!mode || !*mode) {
397 return PerlIO_fdopen(fd, mode);
401 PerlIO_findFILE(PerlIO *pio)
403 int fd = PerlIO_fileno(pio);
404 FILE *f = fdopen(fd, "r+");
406 if (!f && errno == EINVAL)
408 if (!f && errno == EINVAL)
415 /*======================================================================================*/
417 * Implement all the PerlIO interface ourselves.
423 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
430 #include <sys/mman.h>
434 void PerlIO_debug(const char *fmt, ...)
435 __attribute__ ((format(__printf__, 1, 2)));
438 PerlIO_debug(const char *fmt, ...)
445 char *s = PerlEnv_getenv("PERLIO_DEBUG");
447 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
454 /* Use fixed buffer as sv_catpvf etc. needs SVs */
458 s = CopFILE(PL_curcop);
461 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
462 len = strlen(buffer);
463 vsprintf(buffer+len, fmt, ap);
464 PerlLIO_write(dbg, buffer, strlen(buffer));
466 SV *sv = newSVpvn("", 0);
469 s = CopFILE(PL_curcop);
472 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
473 (IV) CopLINE(PL_curcop));
474 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
477 PerlLIO_write(dbg, s, len);
484 /*--------------------------------------------------------------------------------------*/
487 * Inner level routines
491 * Table of pointers to the PerlIO structs (malloc'ed)
493 #define PERLIO_TABLE_SIZE 64
496 PerlIO_allocate(pTHX)
499 * Find a free slot in the table, allocating new table as necessary
504 while ((f = *last)) {
506 last = (PerlIO **) (f);
507 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
513 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
521 #undef PerlIO_fdupopen
523 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
525 if (PerlIOValid(f)) {
526 PerlIO_funcs *tab = PerlIOBase(f)->tab;
527 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
529 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
531 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
535 SETERRNO(EBADF, SS_IVCHAN);
541 PerlIO_cleantable(pTHX_ PerlIO **tablep)
543 PerlIO *table = *tablep;
546 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
547 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
548 PerlIO *f = table + i;
560 PerlIO_list_alloc(pTHX)
563 Newz('L', list, 1, PerlIO_list_t);
569 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
572 if (--list->refcnt == 0) {
575 for (i = 0; i < list->cur; i++) {
576 if (list->array[i].arg)
577 SvREFCNT_dec(list->array[i].arg);
579 Safefree(list->array);
587 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
590 if (list->cur >= list->len) {
593 Renew(list->array, list->len, PerlIO_pair_t);
595 New('l', list->array, list->len, PerlIO_pair_t);
597 p = &(list->array[list->cur++]);
599 if ((p->arg = arg)) {
605 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
607 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
610 list = PerlIO_list_alloc(aTHX);
611 for (i=0; i < proto->cur; i++) {
613 if (proto->array[i].arg)
614 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
615 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
622 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
625 PerlIO **table = &proto->Iperlio;
628 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
629 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
630 PerlIO_allocate(aTHX); /* root slot is never used */
631 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
632 while ((f = *table)) {
634 table = (PerlIO **) (f++);
635 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
637 (void) fp_dup(f, 0, param);
646 PerlIO_destruct(pTHX)
648 PerlIO **table = &PL_perlio;
651 PerlIO_debug("Destruct %p\n",aTHX);
653 while ((f = *table)) {
655 table = (PerlIO **) (f++);
656 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
660 if (l->tab->kind & PERLIO_K_DESTRUCT) {
661 PerlIO_debug("Destruct popping %s\n", l->tab->name);
675 PerlIO_pop(pTHX_ PerlIO *f)
679 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
680 if (l->tab->Popped) {
682 * If popped returns non-zero do not free its layer structure
683 * it has either done so itself, or it is shared and still in
686 if ((*l->tab->Popped) (aTHX_ f) != 0)
694 /* Return as an array the stack of layers on a filehandle. Note that
695 * the stack is returned top-first in the array, and there are three
696 * times as many array elements as there are layers in the stack: the
697 * first element of a layer triplet is the name, the second one is the
698 * arguments, and the third one is the flags. */
701 PerlIO_get_layers(pTHX_ PerlIO *f)
705 if (PerlIOValid(f)) {
706 PerlIOl *l = PerlIOBase(f);
709 SV *name = l->tab && l->tab->name ?
710 newSVpv(l->tab->name, 0) : &PL_sv_undef;
711 SV *arg = l->tab && l->tab->Getarg ?
712 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
715 av_push(av, newSViv((IV)l->flags));
723 /*--------------------------------------------------------------------------------------*/
725 * XS Interface for perl code
729 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
732 if ((SSize_t) len <= 0)
734 for (i = 0; i < PL_known_layers->cur; i++) {
735 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
736 if (memEQ(f->name, name, len)) {
737 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
741 if (load && PL_subname && PL_def_layerlist
742 && PL_def_layerlist->cur >= 2) {
743 if (PL_in_load_module) {
744 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
747 SV *pkgsv = newSVpvn("PerlIO", 6);
748 SV *layer = newSVpvn(name, len);
749 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
751 SAVEINT(PL_in_load_module);
753 SAVESPTR(PL_warnhook);
754 PL_warnhook = (SV *) cv;
758 * The two SVs are magically freed by load_module
760 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
763 return PerlIO_find_layer(aTHX_ name, len, 0);
766 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
770 #ifdef USE_ATTRIBUTES_FOR_PERLIO
773 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
776 IO *io = GvIOn((GV *) SvRV(sv));
777 PerlIO *ifp = IoIFP(io);
778 PerlIO *ofp = IoOFP(io);
779 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
785 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
788 IO *io = GvIOn((GV *) SvRV(sv));
789 PerlIO *ifp = IoIFP(io);
790 PerlIO *ofp = IoOFP(io);
791 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
797 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
799 Perl_warn(aTHX_ "clear %" SVf, sv);
804 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
806 Perl_warn(aTHX_ "free %" SVf, sv);
810 MGVTBL perlio_vtab = {
818 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
821 SV *sv = SvRV(ST(1));
826 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
828 mg = mg_find(sv, PERL_MAGIC_ext);
829 mg->mg_virtual = &perlio_vtab;
831 Perl_warn(aTHX_ "attrib %" SVf, sv);
832 for (i = 2; i < items; i++) {
834 const char *name = SvPV(ST(i), len);
835 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
837 av_push(av, SvREFCNT_inc(layer));
848 #endif /* USE_ATTIBUTES_FOR_PERLIO */
851 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
853 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
854 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
858 XS(XS_PerlIO__Layer__NoWarnings)
860 /* This is used as a %SIG{__WARN__} handler to supress warnings
861 during loading of layers.
865 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
869 XS(XS_PerlIO__Layer__find)
873 Perl_croak(aTHX_ "Usage class->find(name[,load])");
876 char *name = SvPV(ST(1), len);
877 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
878 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
880 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
887 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
889 if (!PL_known_layers)
890 PL_known_layers = PerlIO_list_alloc(aTHX);
891 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
892 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
896 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
899 const char *s = names;
901 while (isSPACE(*s) || *s == ':')
906 const char *as = Nullch;
908 if (!isIDFIRST(*s)) {
910 * Message is consistent with how attribute lists are
911 * passed. Even though this means "foo : : bar" is
912 * seen as an invalid separator character.
914 char q = ((*s == '\'') ? '"' : '\'');
915 if (ckWARN(WARN_LAYER))
916 Perl_warner(aTHX_ packWARN(WARN_LAYER),
917 "perlio: invalid separator character %c%c%c in layer specification list %s",
919 SETERRNO(EINVAL, LIB_INVARG);
924 } while (isALNUM(*e));
940 * It's a nul terminated string, not allowed
941 * to \ the terminating null. Anything other
942 * character is passed over.
952 if (ckWARN(WARN_LAYER))
953 Perl_warner(aTHX_ packWARN(WARN_LAYER),
954 "perlio: argument list not closed for layer \"%.*s\"",
966 bool warn_layer = ckWARN(WARN_LAYER);
967 PerlIO_funcs *layer =
968 PerlIO_find_layer(aTHX_ s, llen, 1);
970 PerlIO_list_push(aTHX_ av, layer,
977 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
990 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
992 PerlIO_funcs *tab = &PerlIO_perlio;
993 #ifdef PERLIO_USING_CRLF
996 if (PerlIO_stdio.Set_ptrcnt)
999 PerlIO_debug("Pushing %s\n", tab->name);
1000 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1005 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1007 return av->array[n].arg;
1011 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1013 if (n >= 0 && n < av->cur) {
1014 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1015 av->array[n].funcs->name);
1016 return av->array[n].funcs;
1019 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1024 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1026 if (PerlIOValid(f)) {
1028 PerlIO_pop(aTHX_ f);
1034 PerlIO_funcs PerlIO_remove = {
1035 sizeof(PerlIO_funcs),
1038 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1056 NULL, /* get_base */
1057 NULL, /* get_bufsiz */
1060 NULL, /* set_ptrcnt */
1064 PerlIO_default_layers(pTHX)
1066 if (!PL_def_layerlist) {
1067 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1068 PerlIO_funcs *osLayer = &PerlIO_unix;
1069 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1070 PerlIO_define_layer(aTHX_ & PerlIO_unix);
1071 #if defined(WIN32) && !defined(UNDER_CE)
1072 PerlIO_define_layer(aTHX_ & PerlIO_win32);
1074 osLayer = &PerlIO_win32;
1077 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1078 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1079 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1080 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
1082 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
1084 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
1085 PerlIO_define_layer(aTHX_ & PerlIO_remove);
1086 PerlIO_define_layer(aTHX_ & PerlIO_byte);
1087 PerlIO_list_push(aTHX_ PL_def_layerlist,
1088 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1091 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1094 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1097 if (PL_def_layerlist->cur < 2) {
1098 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1100 return PL_def_layerlist;
1104 Perl_boot_core_PerlIO(pTHX)
1106 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1107 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1110 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1111 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1115 PerlIO_default_layer(pTHX_ I32 n)
1117 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1120 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1123 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1124 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1127 PerlIO_stdstreams(pTHX)
1130 PerlIO_allocate(aTHX);
1131 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1132 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1133 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1138 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1140 if (tab->fsize != sizeof(PerlIO_funcs)) {
1142 Perl_croak(aTHX_ "Layer does not match this perl");
1146 if (tab->size < sizeof(PerlIOl)) {
1149 /* Real layer with a data area */
1150 Newc('L',l,tab->size,char,PerlIOl);
1152 Zero(l, tab->size, char);
1156 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1157 (mode) ? mode : "(Null)", (void*)arg);
1158 if (*l->tab->Pushed &&
1159 (*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1160 PerlIO_pop(aTHX_ f);
1166 /* Pseudo-layer where push does its own stack adjust */
1167 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1168 (mode) ? mode : "(Null)", (void*)arg);
1170 (*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1178 PerlIOBase_binmode(pTHX_ PerlIO *f)
1180 if (PerlIOValid(f)) {
1181 /* Is layer suitable for raw stream ? */
1182 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1183 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1184 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1187 /* Not suitable - pop it */
1188 PerlIO_pop(aTHX_ f);
1196 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1199 if (PerlIOValid(f)) {
1204 * Strip all layers that are not suitable for a raw stream
1207 while (t && (l = *t)) {
1208 if (l->tab->Binmode) {
1209 /* Has a handler - normal case */
1210 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1212 /* Layer still there - move down a layer */
1221 /* No handler - pop it */
1222 PerlIO_pop(aTHX_ t);
1225 if (PerlIOValid(f)) {
1226 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1234 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1235 PerlIO_list_t *layers, IV n, IV max)
1239 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1241 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1252 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1256 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1257 code = PerlIO_parse_layers(aTHX_ layers, names);
1259 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1261 PerlIO_list_free(aTHX_ layers);
1267 /*--------------------------------------------------------------------------------------*/
1269 * Given the abstraction above the public API functions
1273 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1275 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1276 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1277 (names) ? names : "(Null)");
1279 /* Do not flush etc. if (e.g.) switching encodings.
1280 if a pushed layer knows it needs to flush lower layers
1281 (for example :unix which is never going to call them)
1282 it can do the flush when it is pushed.
1284 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1287 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1288 #ifdef PERLIO_USING_CRLF
1289 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1290 O_BINARY so we can look for it in mode.
1292 if (!(mode & O_BINARY)) {
1294 /* FIXME?: Looking down the layer stack seems wrong,
1295 but is a way of reaching past (say) an encoding layer
1296 to flip CRLF-ness of the layer(s) below
1299 /* Perhaps we should turn on bottom-most aware layer
1300 e.g. Ilya's idea that UNIX TTY could serve
1302 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1303 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1304 /* Not in text mode - flush any pending stuff and flip it */
1306 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1308 /* Only need to turn it on in one layer so we are done */
1313 /* Not finding a CRLF aware layer presumably means we are binary
1314 which is not what was requested - so we failed
1315 We _could_ push :crlf layer but so could caller
1320 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1321 So code that used to be here is now in PerlIORaw_pushed().
1323 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1328 PerlIO__close(pTHX_ PerlIO *f)
1330 if (PerlIOValid(f)) {
1331 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1332 if (tab && tab->Close)
1333 return (*tab->Close)(aTHX_ f);
1335 return PerlIOBase_close(aTHX_ f);
1338 SETERRNO(EBADF, SS_IVCHAN);
1344 Perl_PerlIO_close(pTHX_ PerlIO *f)
1346 int code = PerlIO__close(aTHX_ f);
1347 while (PerlIOValid(f)) {
1348 PerlIO_pop(aTHX_ f);
1354 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1356 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1360 PerlIO_context_layers(pTHX_ const char *mode)
1362 const char *type = NULL;
1364 * Need to supply default layer info from open.pm
1367 SV *layers = PL_curcop->cop_io;
1370 type = SvPV(layers, len);
1371 if (type && mode[0] != 'r') {
1373 * Skip to write part
1375 const char *s = strchr(type, 0);
1376 if (s && (STRLEN)(s - type) < len) {
1385 static PerlIO_funcs *
1386 PerlIO_layer_from_ref(pTHX_ SV *sv)
1389 * For any scalar type load the handler which is bundled with perl
1391 if (SvTYPE(sv) < SVt_PVAV)
1392 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1395 * For other types allow if layer is known but don't try and load it
1397 switch (SvTYPE(sv)) {
1399 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1401 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1403 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1405 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1411 PerlIO_resolve_layers(pTHX_ const char *layers,
1412 const char *mode, int narg, SV **args)
1414 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1417 PerlIO_stdstreams(aTHX);
1421 * If it is a reference but not an object see if we have a handler
1424 if (SvROK(arg) && !sv_isobject(arg)) {
1425 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1427 def = PerlIO_list_alloc(aTHX);
1428 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1432 * Don't fail if handler cannot be found :via(...) etc. may do
1433 * something sensible else we will just stringfy and open
1439 layers = PerlIO_context_layers(aTHX_ mode);
1440 if (layers && *layers) {
1444 av = PerlIO_list_alloc(aTHX);
1445 for (i = 0; i < def->cur; i++) {
1446 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1453 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1457 PerlIO_list_free(aTHX_ av);
1458 return (PerlIO_list_t *) NULL;
1469 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1470 int imode, int perm, PerlIO *f, int narg, SV **args)
1472 if (!f && narg == 1 && *args == &PL_sv_undef) {
1473 if ((f = PerlIO_tmpfile())) {
1475 layers = PerlIO_context_layers(aTHX_ mode);
1476 if (layers && *layers)
1477 PerlIO_apply_layers(aTHX_ f, mode, layers);
1481 PerlIO_list_t *layera = NULL;
1483 PerlIO_funcs *tab = NULL;
1484 if (PerlIOValid(f)) {
1486 * This is "reopen" - it is not tested as perl does not use it
1490 layera = PerlIO_list_alloc(aTHX);
1492 SV *arg = (l->tab->Getarg)
1493 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1495 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1496 l = *PerlIONext(&l);
1500 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1506 * Start at "top" of layer stack
1508 n = layera->cur - 1;
1510 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1519 * Found that layer 'n' can do opens - call it
1521 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1522 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1524 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1525 tab->name, layers, mode, fd, imode, perm,
1526 (void*)f, narg, (void*)args);
1528 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1531 SETERRNO(EINVAL, LIB_INVARG);
1535 if (n + 1 < layera->cur) {
1537 * More layers above the one that we used to open -
1540 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1541 /* If pushing layers fails close the file */
1548 PerlIO_list_free(aTHX_ layera);
1555 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1557 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1561 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1563 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1567 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1569 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1573 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1575 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1579 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1581 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1585 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1589 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1591 if (tab && tab->Flush)
1592 return (*tab->Flush) (aTHX_ f);
1594 return 0; /* If no Flush defined, silently succeed. */
1597 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1598 SETERRNO(EBADF, SS_IVCHAN);
1604 * Is it good API design to do flush-all on NULL, a potentially
1605 * errorneous input? Maybe some magical value (PerlIO*
1606 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1607 * things on fflush(NULL), but should we be bound by their design
1610 PerlIO **table = &PL_perlio;
1612 while ((f = *table)) {
1614 table = (PerlIO **) (f++);
1615 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1616 if (*f && PerlIO_flush(f) != 0)
1626 PerlIOBase_flush_linebuf(pTHX)
1628 PerlIO **table = &PL_perlio;
1630 while ((f = *table)) {
1632 table = (PerlIO **) (f++);
1633 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1636 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1637 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1645 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1647 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1651 PerlIO_isutf8(PerlIO *f)
1654 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1656 SETERRNO(EBADF, SS_IVCHAN);
1662 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1664 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1668 Perl_PerlIO_error(pTHX_ PerlIO *f)
1670 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1674 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1676 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1680 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1682 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1686 PerlIO_has_base(PerlIO *f)
1688 if (PerlIOValid(f)) {
1689 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1692 return (tab->Get_base != NULL);
1693 SETERRNO(EINVAL, LIB_INVARG);
1696 SETERRNO(EBADF, SS_IVCHAN);
1702 PerlIO_fast_gets(PerlIO *f)
1704 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1705 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1708 return (tab->Set_ptrcnt != NULL);
1709 SETERRNO(EINVAL, LIB_INVARG);
1712 SETERRNO(EBADF, SS_IVCHAN);
1718 PerlIO_has_cntptr(PerlIO *f)
1720 if (PerlIOValid(f)) {
1721 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1724 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1725 SETERRNO(EINVAL, LIB_INVARG);
1728 SETERRNO(EBADF, SS_IVCHAN);
1734 PerlIO_canset_cnt(PerlIO *f)
1736 if (PerlIOValid(f)) {
1737 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1740 return (tab->Set_ptrcnt != NULL);
1741 SETERRNO(EINVAL, LIB_INVARG);
1744 SETERRNO(EBADF, SS_IVCHAN);
1750 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1752 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1756 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1758 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1762 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1764 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1768 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1770 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1774 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1776 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1780 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1782 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1786 /*--------------------------------------------------------------------------------------*/
1788 * utf8 and raw dummy layers
1792 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1794 if (PerlIOValid(f)) {
1795 if (tab->kind & PERLIO_K_UTF8)
1796 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1798 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1804 PerlIO_funcs PerlIO_utf8 = {
1805 sizeof(PerlIO_funcs),
1808 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1826 NULL, /* get_base */
1827 NULL, /* get_bufsiz */
1830 NULL, /* set_ptrcnt */
1833 PerlIO_funcs PerlIO_byte = {
1834 sizeof(PerlIO_funcs),
1855 NULL, /* get_base */
1856 NULL, /* get_bufsiz */
1859 NULL, /* set_ptrcnt */
1863 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1864 IV n, const char *mode, int fd, int imode, int perm,
1865 PerlIO *old, int narg, SV **args)
1867 PerlIO_funcs *tab = PerlIO_default_btm();
1868 if (tab && tab->Open)
1869 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1871 SETERRNO(EINVAL, LIB_INVARG);
1875 PerlIO_funcs PerlIO_raw = {
1876 sizeof(PerlIO_funcs),
1897 NULL, /* get_base */
1898 NULL, /* get_bufsiz */
1901 NULL, /* set_ptrcnt */
1903 /*--------------------------------------------------------------------------------------*/
1904 /*--------------------------------------------------------------------------------------*/
1906 * "Methods" of the "base class"
1910 PerlIOBase_fileno(pTHX_ PerlIO *f)
1912 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1916 PerlIO_modestr(PerlIO * f, char *buf)
1919 if (PerlIOValid(f)) {
1920 IV flags = PerlIOBase(f)->flags;
1921 if (flags & PERLIO_F_APPEND) {
1923 if (flags & PERLIO_F_CANREAD) {
1927 else if (flags & PERLIO_F_CANREAD) {
1929 if (flags & PERLIO_F_CANWRITE)
1932 else if (flags & PERLIO_F_CANWRITE) {
1934 if (flags & PERLIO_F_CANREAD) {
1938 #ifdef PERLIO_USING_CRLF
1939 if (!(flags & PERLIO_F_CRLF))
1949 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1951 PerlIOl *l = PerlIOBase(f);
1953 const char *omode = mode;
1956 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1957 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1958 if (tab->Set_ptrcnt != NULL)
1959 l->flags |= PERLIO_F_FASTGETS;
1961 if (*mode == '#' || *mode == 'I')
1965 l->flags |= PERLIO_F_CANREAD;
1968 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1971 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1974 SETERRNO(EINVAL, LIB_INVARG);
1980 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1983 l->flags &= ~PERLIO_F_CRLF;
1986 l->flags |= PERLIO_F_CRLF;
1989 SETERRNO(EINVAL, LIB_INVARG);
1996 l->flags |= l->next->flags &
1997 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2002 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2003 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2004 l->flags, PerlIO_modestr(f, temp));
2010 PerlIOBase_popped(pTHX_ PerlIO *f)
2016 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2019 * Save the position as current head considers it
2021 Off_t old = PerlIO_tell(f);
2023 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2024 PerlIOSelf(f, PerlIOBuf)->posn = old;
2025 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
2030 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2032 STDCHAR *buf = (STDCHAR *) vbuf;
2034 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2037 SSize_t avail = PerlIO_get_cnt(f);
2040 take = ((SSize_t)count < avail) ? count : avail;
2042 STDCHAR *ptr = PerlIO_get_ptr(f);
2043 Copy(ptr, buf, take, STDCHAR);
2044 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2048 if (count > 0 && avail <= 0) {
2049 if (PerlIO_fill(f) != 0)
2053 return (buf - (STDCHAR *) vbuf);
2059 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2065 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2071 PerlIOBase_close(pTHX_ PerlIO *f)
2074 if (PerlIOValid(f)) {
2075 PerlIO *n = PerlIONext(f);
2076 code = PerlIO_flush(f);
2077 PerlIOBase(f)->flags &=
2078 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2079 while (PerlIOValid(n)) {
2080 PerlIO_funcs *tab = PerlIOBase(n)->tab;
2081 if (tab && tab->Close) {
2082 if ((*tab->Close)(aTHX_ n) != 0)
2087 PerlIOBase(n)->flags &=
2088 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2094 SETERRNO(EBADF, SS_IVCHAN);
2100 PerlIOBase_eof(pTHX_ PerlIO *f)
2102 if (PerlIOValid(f)) {
2103 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2109 PerlIOBase_error(pTHX_ PerlIO *f)
2111 if (PerlIOValid(f)) {
2112 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2118 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2120 if (PerlIOValid(f)) {
2121 PerlIO *n = PerlIONext(f);
2122 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2129 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2131 if (PerlIOValid(f)) {
2132 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2137 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2143 return sv_dup(arg, param);
2146 return newSVsv(arg);
2149 return newSVsv(arg);
2154 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2156 PerlIO *nexto = PerlIONext(o);
2157 if (PerlIOValid(nexto)) {
2158 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2159 if (tab && tab->Dup)
2160 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2162 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2165 PerlIO_funcs *self = PerlIOBase(o)->tab;
2168 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2169 self->name, (void*)f, (void*)o, (void*)param);
2171 arg = (*self->Getarg)(aTHX_ o, param, flags);
2175 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2183 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2185 perl_mutex PerlIO_mutex;
2187 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2192 /* Place holder for stdstreams call ??? */
2194 MUTEX_INIT(&PerlIO_mutex);
2199 PerlIOUnix_refcnt_inc(int fd)
2201 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2203 MUTEX_LOCK(&PerlIO_mutex);
2205 PerlIO_fd_refcnt[fd]++;
2206 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2208 MUTEX_UNLOCK(&PerlIO_mutex);
2214 PerlIOUnix_refcnt_dec(int fd)
2217 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2219 MUTEX_LOCK(&PerlIO_mutex);
2221 cnt = --PerlIO_fd_refcnt[fd];
2222 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2224 MUTEX_UNLOCK(&PerlIO_mutex);
2231 PerlIO_cleanup(pTHX)
2235 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2237 PerlIO_debug("Cleanup layers\n");
2239 /* Raise STDIN..STDERR refcount so we don't close them */
2240 for (i=0; i < 3; i++)
2241 PerlIOUnix_refcnt_inc(i);
2242 PerlIO_cleantable(aTHX_ &PL_perlio);
2243 /* Restore STDIN..STDERR refcount */
2244 for (i=0; i < 3; i++)
2245 PerlIOUnix_refcnt_dec(i);
2247 if (PL_known_layers) {
2248 PerlIO_list_free(aTHX_ PL_known_layers);
2249 PL_known_layers = NULL;
2251 if(PL_def_layerlist) {
2252 PerlIO_list_free(aTHX_ PL_def_layerlist);
2253 PL_def_layerlist = NULL;
2259 /*--------------------------------------------------------------------------------------*/
2261 * Bottom-most level for UNIX-like case
2265 struct _PerlIO base; /* The generic part */
2266 int fd; /* UNIX like file descriptor */
2267 int oflags; /* open/fcntl flags */
2271 PerlIOUnix_oflags(const char *mode)
2274 if (*mode == 'I' || *mode == '#')
2279 if (*++mode == '+') {
2286 oflags = O_CREAT | O_TRUNC;
2287 if (*++mode == '+') {
2296 oflags = O_CREAT | O_APPEND;
2297 if (*++mode == '+') {
2310 else if (*mode == 't') {
2312 oflags &= ~O_BINARY;
2316 * Always open in binary mode
2319 if (*mode || oflags == -1) {
2320 SETERRNO(EINVAL, LIB_INVARG);
2327 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2329 return PerlIOSelf(f, PerlIOUnix)->fd;
2333 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2335 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2338 if (PerlLIO_fstat(fd, &st) == 0) {
2339 if (!S_ISREG(st.st_mode)) {
2340 PerlIO_debug("%d is not regular file\n",fd);
2341 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2344 PerlIO_debug("%d _is_ a regular file\n",fd);
2350 PerlIOUnix_refcnt_inc(fd);
2354 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2356 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2357 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2358 if (*PerlIONext(f)) {
2359 /* We never call down so do any pending stuff now */
2360 PerlIO_flush(PerlIONext(f));
2362 * XXX could (or should) we retrieve the oflags from the open file
2363 * handle rather than believing the "mode" we are passed in? XXX
2364 * Should the value on NULL mode be 0 or -1?
2366 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2367 mode ? PerlIOUnix_oflags(mode) : -1);
2369 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2375 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2376 IV n, const char *mode, int fd, int imode,
2377 int perm, PerlIO *f, int narg, SV **args)
2379 if (PerlIOValid(f)) {
2380 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2381 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2384 char *path = SvPV_nolen(*args);
2388 imode = PerlIOUnix_oflags(mode);
2392 fd = PerlLIO_open3(path, imode, perm);
2399 f = PerlIO_allocate(aTHX);
2401 if (!PerlIOValid(f)) {
2402 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2406 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2407 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2413 * FIXME: pop layers ???
2421 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2423 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2425 if (flags & PERLIO_DUP_FD) {
2426 fd = PerlLIO_dup(fd);
2428 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2429 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2431 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2432 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2441 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2443 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2444 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2445 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2449 SSize_t len = PerlLIO_read(fd, vbuf, count);
2450 if (len >= 0 || errno != EINTR) {
2452 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2453 else if (len == 0 && count != 0)
2454 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2462 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2464 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2466 SSize_t len = PerlLIO_write(fd, vbuf, count);
2467 if (len >= 0 || errno != EINTR) {
2469 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2477 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2479 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2481 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2483 SETERRNO(ESPIPE, LIB_INVARG);
2485 SETERRNO(EINVAL, LIB_INVARG);
2489 new = PerlLIO_lseek(fd, offset, whence);
2490 if (new == (Off_t) - 1)
2494 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2499 PerlIOUnix_tell(pTHX_ PerlIO *f)
2501 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2506 PerlIOUnix_close(pTHX_ PerlIO *f)
2508 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2510 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2511 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2512 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2517 SETERRNO(EBADF,SS_IVCHAN);
2520 while (PerlLIO_close(fd) != 0) {
2521 if (errno != EINTR) {
2528 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2533 PerlIO_funcs PerlIO_unix = {
2534 sizeof(PerlIO_funcs),
2541 PerlIOBase_binmode, /* binmode */
2551 PerlIOBase_noop_ok, /* flush */
2552 PerlIOBase_noop_fail, /* fill */
2555 PerlIOBase_clearerr,
2556 PerlIOBase_setlinebuf,
2557 NULL, /* get_base */
2558 NULL, /* get_bufsiz */
2561 NULL, /* set_ptrcnt */
2564 /*--------------------------------------------------------------------------------------*/
2569 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2570 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2571 broken by the last second glibc 2.3 fix
2573 #define STDIO_BUFFER_WRITABLE
2578 struct _PerlIO base;
2579 FILE *stdio; /* The stream */
2583 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2586 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2587 return PerlSIO_fileno(s);
2594 PerlIOStdio_mode(const char *mode, char *tmode)
2600 #ifdef PERLIO_USING_CRLF
2608 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2611 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2612 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2613 if (toptab == tab) {
2614 /* Top is already stdio - pop self (duplicate) and use original */
2615 PerlIO_pop(aTHX_ f);
2618 int fd = PerlIO_fileno(n);
2621 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2622 mode = PerlIOStdio_mode(mode, tmode)))) {
2623 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2624 /* We never call down so do any pending stuff now */
2625 PerlIO_flush(PerlIONext(f));
2632 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2637 PerlIO_importFILE(FILE *stdio, const char *mode)
2643 if (!mode || !*mode) {
2644 /* We need to probe to see how we can open the stream
2645 so start with read/write and then try write and read
2646 we dup() so that we can fclose without loosing the fd.
2648 Note that the errno value set by a failing fdopen
2649 varies between stdio implementations.
2651 int fd = PerlLIO_dup(fileno(stdio));
2652 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2654 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2657 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2660 /* Don't seem to be able to open */
2666 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2667 s = PerlIOSelf(f, PerlIOStdio);
2675 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2676 IV n, const char *mode, int fd, int imode,
2677 int perm, PerlIO *f, int narg, SV **args)
2680 if (PerlIOValid(f)) {
2681 char *path = SvPV_nolen(*args);
2682 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2684 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2685 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2690 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2695 char *path = SvPV_nolen(*args);
2698 fd = PerlLIO_open3(path, imode, perm);
2701 FILE *stdio = PerlSIO_fopen(path, mode);
2705 f = PerlIO_allocate(aTHX);
2707 if ((f = PerlIO_push(aTHX_ f, self,
2708 (mode = PerlIOStdio_mode(mode, tmode)),
2710 s = PerlIOSelf(f, PerlIOStdio);
2712 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2731 stdio = PerlSIO_stdin;
2734 stdio = PerlSIO_stdout;
2737 stdio = PerlSIO_stderr;
2742 stdio = PerlSIO_fdopen(fd, mode =
2743 PerlIOStdio_mode(mode, tmode));
2748 f = PerlIO_allocate(aTHX);
2750 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2751 s = PerlIOSelf(f, PerlIOStdio);
2753 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2763 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2765 /* This assumes no layers underneath - which is what
2766 happens, but is not how I remember it. NI-S 2001/10/16
2768 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2769 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2770 int fd = fileno(stdio);
2772 if (flags & PERLIO_DUP_FD) {
2773 int dfd = PerlLIO_dup(fileno(stdio));
2775 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2779 /* FIXME: To avoid messy error recovery if dup fails
2780 re-use the existing stdio as though flag was not set
2784 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2786 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2787 PerlIOUnix_refcnt_inc(fileno(stdio));
2793 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2795 /* XXX this could use PerlIO_canset_fileno() and
2796 * PerlIO_set_fileno() support from Configure
2798 # if defined(__GLIBC__)
2799 /* There may be a better way for GLIBC:
2800 - libio.h defines a flag to not close() on cleanup
2804 # elif defined(__sun__)
2806 /* On solaris, if _LP64 is defined, the FILE structure is this:
2812 * It turns out that the fd is stored in the top 32 bits of
2813 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2814 * to contain a pointer or offset into another structure. All the
2815 * remaining fields are zero.
2817 * We set the top bits to -1 (0xFFFFFFFF).
2819 f->__pad[4] |= 0xffffffff00000000L;
2820 assert(fileno(f) == 0xffffffff);
2821 # else /* !defined(_LP64) */
2822 /* _file is just a unsigned char :-(
2823 Not clear why we dup() rather than using -1
2824 even if that would be treated as 0xFF - so will
2827 f->_file = PerlLIO_dup(fileno(f));
2828 # endif /* defined(_LP64) */
2830 # elif defined(__hpux)
2834 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2835 your platform does not have special entry try this one.
2836 [For OSF only have confirmation for Tru64 (alpha)
2837 but assume other OSFs will be similar.]
2839 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2842 # elif defined(__FreeBSD__)
2843 /* There may be a better way on FreeBSD:
2844 - we could insert a dummy func in the _close function entry
2845 f->_close = (int (*)(void *)) dummy_close;
2849 # elif defined(__CYGWIN__)
2850 /* There may be a better way on CYGWIN:
2851 - we could insert a dummy func in the _close function entry
2852 f->_close = (int (*)(void *)) dummy_close;
2856 # elif defined(WIN32)
2857 # if defined(__BORLANDC__)
2858 f->fd = PerlLIO_dup(fileno(f));
2859 # elif defined(UNDER_CE)
2860 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2869 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2870 (which isn't thread safe) instead
2872 # error "Don't know how to set FILE.fileno on your platform"
2879 PerlIOStdio_close(pTHX_ PerlIO *f)
2881 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2887 int fd = fileno(stdio);
2893 #ifdef SOCKS5_VERSION_NAME
2894 /* Socks lib overrides close() but stdio isn't linked to
2895 that library (though we are) - so we must call close()
2896 on sockets on stdio's behalf.
2899 Sock_size_t optlen = sizeof(int);
2900 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2905 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2906 /* File descriptor still in use */
2911 /* For STD* handles don't close the stdio at all
2912 this is because we have shared the FILE * too
2914 if (stdio == stdin) {
2915 /* Some stdios are buggy fflush-ing inputs */
2918 else if (stdio == stdout || stdio == stderr) {
2919 return PerlIO_flush(f);
2921 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2922 Use Sarathy's trick from maint-5.6 to invalidate the
2923 fileno slot of the FILE *
2925 result = PerlIO_flush(f);
2927 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
2928 dupfd = PerlLIO_dup(fd);
2931 result = PerlSIO_fclose(stdio);
2932 /* We treat error from stdio as success if we invalidated
2933 errno may NOT be expected EBADF
2935 if (invalidate && result != 0) {
2940 /* in SOCKS case let close() determine return value */
2944 PerlLIO_dup2(dupfd,fd);
2952 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2954 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2958 STDCHAR *buf = (STDCHAR *) vbuf;
2960 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2961 * stdio does not do that for fread()
2963 int ch = PerlSIO_fgetc(s);
2970 got = PerlSIO_fread(vbuf, 1, count, s);
2971 if (got || errno != EINTR)
2974 errno = 0; /* just in case */
2980 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2983 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2985 #ifdef STDIO_BUFFER_WRITABLE
2986 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2987 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2988 STDCHAR *base = PerlIO_get_base(f);
2989 SSize_t cnt = PerlIO_get_cnt(f);
2990 STDCHAR *ptr = PerlIO_get_ptr(f);
2991 SSize_t avail = ptr - base;
2993 if (avail > count) {
2997 Move(buf-avail,ptr,avail,STDCHAR);
3000 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3001 if (PerlSIO_feof(s) && unread >= 0)
3002 PerlSIO_clearerr(s);
3007 if (PerlIO_has_cntptr(f)) {
3008 /* We can get pointer to buffer but not its base
3009 Do ungetc() but check chars are ending up in the
3012 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3013 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3015 int ch = *--buf & 0xFF;
3016 if (ungetc(ch,s) != ch) {
3017 /* ungetc did not work */
3020 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3021 /* Did not change pointer as expected */
3022 fgetc(s); /* get char back again */
3032 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3038 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3042 got = PerlSIO_fwrite(vbuf, 1, count,
3043 PerlIOSelf(f, PerlIOStdio)->stdio);
3044 if (got || errno != EINTR)
3047 errno = 0; /* just in case */
3053 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3055 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3056 return PerlSIO_fseek(stdio, offset, whence);
3060 PerlIOStdio_tell(pTHX_ PerlIO *f)
3062 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3063 return PerlSIO_ftell(stdio);
3067 PerlIOStdio_flush(pTHX_ PerlIO *f)
3069 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3070 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3071 return PerlSIO_fflush(stdio);
3076 * FIXME: This discards ungetc() and pre-read stuff which is not
3077 * right if this is just a "sync" from a layer above Suspect right
3078 * design is to do _this_ but not have layer above flush this
3079 * layer read-to-read
3082 * Not writeable - sync by attempting a seek
3085 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3093 PerlIOStdio_eof(pTHX_ PerlIO *f)
3095 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3099 PerlIOStdio_error(pTHX_ PerlIO *f)
3101 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3105 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3107 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3111 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3113 #ifdef HAS_SETLINEBUF
3114 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3116 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3122 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3124 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3125 return (STDCHAR*)PerlSIO_get_base(stdio);
3129 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3131 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3132 return PerlSIO_get_bufsiz(stdio);
3136 #ifdef USE_STDIO_PTR
3138 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3140 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3141 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3145 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3147 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3148 return PerlSIO_get_cnt(stdio);
3152 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3154 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3156 #ifdef STDIO_PTR_LVALUE
3157 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3158 #ifdef STDIO_PTR_LVAL_SETS_CNT
3159 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3160 assert(PerlSIO_get_cnt(stdio) == (cnt));
3163 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3165 * Setting ptr _does_ change cnt - we are done
3169 #else /* STDIO_PTR_LVALUE */
3171 #endif /* STDIO_PTR_LVALUE */
3174 * Now (or only) set cnt
3176 #ifdef STDIO_CNT_LVALUE
3177 PerlSIO_set_cnt(stdio, cnt);
3178 #else /* STDIO_CNT_LVALUE */
3179 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3180 PerlSIO_set_ptr(stdio,
3181 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3183 #else /* STDIO_PTR_LVAL_SETS_CNT */
3185 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3186 #endif /* STDIO_CNT_LVALUE */
3193 PerlIOStdio_fill(pTHX_ PerlIO *f)
3195 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3198 * fflush()ing read-only streams can cause trouble on some stdio-s
3200 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3201 if (PerlSIO_fflush(stdio) != 0)
3204 c = PerlSIO_fgetc(stdio);
3208 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3210 #ifdef STDIO_BUFFER_WRITABLE
3211 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3212 /* Fake ungetc() to the real buffer in case system's ungetc
3215 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3216 SSize_t cnt = PerlSIO_get_cnt(stdio);
3217 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3218 if (ptr == base+1) {
3219 *--ptr = (STDCHAR) c;
3220 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3221 if (PerlSIO_feof(stdio))
3222 PerlSIO_clearerr(stdio);
3228 if (PerlIO_has_cntptr(f)) {
3230 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3237 /* An ungetc()d char is handled separately from the regular
3238 * buffer, so we stuff it in the buffer ourselves.
3239 * Should never get called as should hit code above
3241 *(--((*stdio)->_ptr)) = (unsigned char) c;
3244 /* If buffer snoop scheme above fails fall back to
3247 if (PerlSIO_ungetc(c, stdio) != c)
3255 PerlIO_funcs PerlIO_stdio = {
3256 sizeof(PerlIO_funcs),
3258 sizeof(PerlIOStdio),
3259 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3263 PerlIOBase_binmode, /* binmode */
3277 PerlIOStdio_clearerr,
3278 PerlIOStdio_setlinebuf,
3280 PerlIOStdio_get_base,
3281 PerlIOStdio_get_bufsiz,
3286 #ifdef USE_STDIO_PTR
3287 PerlIOStdio_get_ptr,
3288 PerlIOStdio_get_cnt,
3289 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3290 PerlIOStdio_set_ptrcnt,
3293 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3298 #endif /* USE_STDIO_PTR */
3301 /* Note that calls to PerlIO_exportFILE() are reversed using
3302 * PerlIO_releaseFILE(), not importFILE. */
3304 PerlIO_exportFILE(PerlIO * f, const char *mode)
3308 if (PerlIOValid(f)) {
3311 if (!mode || !*mode) {
3312 mode = PerlIO_modestr(f, buf);
3314 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3317 /* De-link any lower layers so new :stdio sticks */
3319 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3320 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3322 /* Link previous lower layers under new one */
3326 /* restore layers list */
3336 PerlIO_findFILE(PerlIO *f)
3340 if (l->tab == &PerlIO_stdio) {
3341 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3344 l = *PerlIONext(&l);
3346 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3347 return PerlIO_exportFILE(f, Nullch);
3350 /* Use this to reverse PerlIO_exportFILE calls. */
3352 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3356 if (l->tab == &PerlIO_stdio) {
3357 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3358 if (s->stdio == f) {
3360 PerlIO_pop(aTHX_ p);
3369 /*--------------------------------------------------------------------------------------*/
3371 * perlio buffer layer
3375 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3377 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3378 int fd = PerlIO_fileno(f);
3379 if (fd >= 0 && PerlLIO_isatty(fd)) {
3380 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3382 if (*PerlIONext(f)) {
3383 Off_t posn = PerlIO_tell(PerlIONext(f));
3384 if (posn != (Off_t) - 1) {
3388 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3392 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3393 IV n, const char *mode, int fd, int imode, int perm,
3394 PerlIO *f, int narg, SV **args)
3396 if (PerlIOValid(f)) {
3397 PerlIO *next = PerlIONext(f);
3398 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3399 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3401 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3406 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3414 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3417 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3419 * if push fails during open, open fails. close will pop us.
3424 fd = PerlIO_fileno(f);
3425 if (init && fd == 2) {
3427 * Initial stderr is unbuffered
3429 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3431 #ifdef PERLIO_USING_CRLF
3432 # ifdef PERLIO_IS_BINMODE_FD
3433 if (PERLIO_IS_BINMODE_FD(fd))
3434 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3438 * do something about failing setmode()? --jhi
3440 PerlLIO_setmode(fd, O_BINARY);
3449 * This "flush" is akin to sfio's sync in that it handles files in either
3450 * read or write state
3453 PerlIOBuf_flush(pTHX_ PerlIO *f)
3455 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3457 PerlIO *n = PerlIONext(f);
3458 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3460 * write() the buffer
3462 STDCHAR *buf = b->buf;
3464 while (p < b->ptr) {
3465 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3469 else if (count < 0 || PerlIO_error(n)) {
3470 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3475 b->posn += (p - buf);
3477 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3478 STDCHAR *buf = PerlIO_get_base(f);
3480 * Note position change
3482 b->posn += (b->ptr - buf);
3483 if (b->ptr < b->end) {
3484 /* We did not consume all of it - try and seek downstream to
3485 our logical position
3487 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3488 /* Reload n as some layers may pop themselves on seek */
3489 b->posn = PerlIO_tell(n = PerlIONext(f));
3492 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3493 data is lost for good - so return saying "ok" having undone
3496 b->posn -= (b->ptr - buf);
3501 b->ptr = b->end = b->buf;
3502 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3503 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3504 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3510 PerlIOBuf_fill(pTHX_ PerlIO *f)
3512 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3513 PerlIO *n = PerlIONext(f);
3516 * Down-stream flush is defined not to loose read data so is harmless.
3517 * we would not normally be fill'ing if there was data left in anycase.
3519 if (PerlIO_flush(f) != 0)
3521 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3522 PerlIOBase_flush_linebuf(aTHX);
3525 PerlIO_get_base(f); /* allocate via vtable */
3527 b->ptr = b->end = b->buf;
3529 if (!PerlIOValid(n)) {
3530 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3534 if (PerlIO_fast_gets(n)) {
3536 * Layer below is also buffered. We do _NOT_ want to call its
3537 * ->Read() because that will loop till it gets what we asked for
3538 * which may hang on a pipe etc. Instead take anything it has to
3539 * hand, or ask it to fill _once_.
3541 avail = PerlIO_get_cnt(n);
3543 avail = PerlIO_fill(n);
3545 avail = PerlIO_get_cnt(n);
3547 if (!PerlIO_error(n) && PerlIO_eof(n))
3552 STDCHAR *ptr = PerlIO_get_ptr(n);
3553 SSize_t cnt = avail;
3554 if (avail > (SSize_t)b->bufsiz)
3556 Copy(ptr, b->buf, avail, STDCHAR);
3557 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3561 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3565 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3567 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3570 b->end = b->buf + avail;
3571 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3576 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3578 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3579 if (PerlIOValid(f)) {
3582 return PerlIOBase_read(aTHX_ f, vbuf, count);
3588 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3590 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3591 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3594 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3599 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3601 * Buffer is already a read buffer, we can overwrite any chars
3602 * which have been read back to buffer start
3604 avail = (b->ptr - b->buf);
3608 * Buffer is idle, set it up so whole buffer is available for
3612 b->end = b->buf + avail;
3614 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3616 * Buffer extends _back_ from where we are now
3618 b->posn -= b->bufsiz;
3620 if (avail > (SSize_t) count) {
3622 * If we have space for more than count, just move count
3630 * In simple stdio-like ungetc() case chars will be already
3633 if (buf != b->ptr) {
3634 Copy(buf, b->ptr, avail, STDCHAR);
3638 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3642 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3648 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3650 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3651 const STDCHAR *buf = (const STDCHAR *) vbuf;
3655 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3657 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3658 if (PerlIO_flush(f) != 0) {
3663 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3664 if ((SSize_t) count < avail)
3666 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3667 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3682 Copy(buf, b->ptr, avail, STDCHAR);
3689 if (b->ptr >= (b->buf + b->bufsiz))
3692 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3698 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3701 if ((code = PerlIO_flush(f)) == 0) {
3702 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3703 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3704 code = PerlIO_seek(PerlIONext(f), offset, whence);
3706 b->posn = PerlIO_tell(PerlIONext(f));
3713 PerlIOBuf_tell(pTHX_ PerlIO *f)
3715 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3717 * b->posn is file position where b->buf was read, or will be written
3719 Off_t posn = b->posn;
3720 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3721 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3723 /* As O_APPEND files are normally shared in some sense it is better
3728 /* when file is NOT shared then this is sufficient */
3729 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3731 posn = b->posn = PerlIO_tell(PerlIONext(f));
3735 * If buffer is valid adjust position by amount in buffer
3737 posn += (b->ptr - b->buf);
3743 PerlIOBuf_popped(pTHX_ PerlIO *f)
3745 IV code = PerlIOBase_popped(aTHX_ f);
3746 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3747 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3751 b->ptr = b->end = b->buf;
3752 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3757 PerlIOBuf_close(pTHX_ PerlIO *f)
3759 IV code = PerlIOBase_close(aTHX_ f);
3760 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3761 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3765 b->ptr = b->end = b->buf;
3766 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3771 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3773 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3780 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3782 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3785 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3786 return (b->end - b->ptr);
3791 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3793 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3798 Newz('B',b->buf,b->bufsiz, STDCHAR);
3800 b->buf = (STDCHAR *) & b->oneword;
3801 b->bufsiz = sizeof(b->oneword);
3810 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3812 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3815 return (b->end - b->buf);
3819 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3821 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3825 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3826 assert(PerlIO_get_cnt(f) == cnt);
3827 assert(b->ptr >= b->buf);
3829 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3833 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3835 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3840 PerlIO_funcs PerlIO_perlio = {
3841 sizeof(PerlIO_funcs),
3844 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3848 PerlIOBase_binmode, /* binmode */
3862 PerlIOBase_clearerr,
3863 PerlIOBase_setlinebuf,
3868 PerlIOBuf_set_ptrcnt,
3871 /*--------------------------------------------------------------------------------------*/
3873 * Temp layer to hold unread chars when cannot do it any other way
3877 PerlIOPending_fill(pTHX_ PerlIO *f)
3880 * Should never happen
3887 PerlIOPending_close(pTHX_ PerlIO *f)
3890 * A tad tricky - flush pops us, then we close new top
3893 return PerlIO_close(f);
3897 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3900 * A tad tricky - flush pops us, then we seek new top
3903 return PerlIO_seek(f, offset, whence);
3908 PerlIOPending_flush(pTHX_ PerlIO *f)
3910 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3911 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3915 PerlIO_pop(aTHX_ f);
3920 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3926 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3931 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3933 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3934 PerlIOl *l = PerlIOBase(f);
3936 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3937 * etc. get muddled when it changes mid-string when we auto-pop.
3939 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3940 (PerlIOBase(PerlIONext(f))->
3941 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3946 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3948 SSize_t avail = PerlIO_get_cnt(f);
3950 if ((SSize_t)count < avail)
3953 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3954 if (got >= 0 && got < (SSize_t)count) {
3956 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3957 if (more >= 0 || got == 0)
3963 PerlIO_funcs PerlIO_pending = {
3964 sizeof(PerlIO_funcs),
3967 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3968 PerlIOPending_pushed,
3971 PerlIOBase_binmode, /* binmode */
3980 PerlIOPending_close,
3981 PerlIOPending_flush,
3985 PerlIOBase_clearerr,
3986 PerlIOBase_setlinebuf,
3991 PerlIOPending_set_ptrcnt,
3996 /*--------------------------------------------------------------------------------------*/
3998 * crlf - translation On read translate CR,LF to "\n" we do this by
3999 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4000 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4004 PerlIOBuf base; /* PerlIOBuf stuff */
4005 STDCHAR *nl; /* Position of crlf we "lied" about in the
4010 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4013 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4014 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4016 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4017 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4018 PerlIOBase(f)->flags);
4025 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4027 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4032 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4033 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4035 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4036 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4038 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4043 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4044 b->end = b->ptr = b->buf + b->bufsiz;
4045 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4046 b->posn -= b->bufsiz;
4048 while (count > 0 && b->ptr > b->buf) {
4051 if (b->ptr - 2 >= b->buf) {
4074 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4076 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4079 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4080 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4081 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4082 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4084 while (nl < b->end && *nl != 0xd)
4086 if (nl < b->end && *nl == 0xd) {
4088 if (nl + 1 < b->end) {
4095 * Not CR,LF but just CR
4103 * Blast - found CR as last char in buffer
4108 * They may not care, defer work as long as
4112 return (nl - b->ptr);
4116 b->ptr++; /* say we have read it as far as
4117 * flush() is concerned */
4118 b->buf++; /* Leave space in front of buffer */
4119 /* Note as we have moved buf up flush's
4121 will naturally make posn point at CR
4123 b->bufsiz--; /* Buffer is thus smaller */
4124 code = PerlIO_fill(f); /* Fetch some more */
4125 b->bufsiz++; /* Restore size for next time */
4126 b->buf--; /* Point at space */
4127 b->ptr = nl = b->buf; /* Which is what we hand
4129 *nl = 0xd; /* Fill in the CR */
4131 goto test; /* fill() call worked */
4133 * CR at EOF - just fall through
4135 /* Should we clear EOF though ??? */
4140 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4146 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4148 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4149 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4155 if (ptr == b->end && *c->nl == 0xd) {
4156 /* Defered CR at end of buffer case - we lied about count */
4168 * Test code - delete when it works ...
4170 IV flags = PerlIOBase(f)->flags;
4171 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4172 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4173 /* Defered CR at end of buffer case - we lied about count */
4179 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4180 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4188 * They have taken what we lied about
4196 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4200 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4202 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4203 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4205 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4206 const STDCHAR *buf = (const STDCHAR *) vbuf;
4207 const STDCHAR *ebuf = buf + count;
4210 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4212 while (buf < ebuf) {
4213 STDCHAR *eptr = b->buf + b->bufsiz;
4214 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4215 while (buf < ebuf && b->ptr < eptr) {
4217 if ((b->ptr + 2) > eptr) {
4225 *(b->ptr)++ = 0xd; /* CR */
4226 *(b->ptr)++ = 0xa; /* LF */
4228 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4238 if (b->ptr >= eptr) {
4244 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4246 return (buf - (STDCHAR *) vbuf);
4251 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4253 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4258 return PerlIOBuf_flush(aTHX_ f);
4262 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4264 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4265 /* In text mode - flush any pending stuff and flip it */
4266 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4267 #ifndef PERLIO_USING_CRLF
4268 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4269 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4270 PerlIO_pop(aTHX_ f);
4277 PerlIO_funcs PerlIO_crlf = {
4278 sizeof(PerlIO_funcs),
4281 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4283 PerlIOBuf_popped, /* popped */
4285 PerlIOCrlf_binmode, /* binmode */
4289 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4291 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4292 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4300 PerlIOBase_clearerr,
4301 PerlIOBase_setlinebuf,
4306 PerlIOCrlf_set_ptrcnt,
4310 /*--------------------------------------------------------------------------------------*/
4312 * mmap as "buffer" layer
4316 PerlIOBuf base; /* PerlIOBuf stuff */
4317 Mmap_t mptr; /* Mapped address */
4318 Size_t len; /* mapped length */
4319 STDCHAR *bbuf; /* malloced buffer if map fails */
4322 static size_t page_size = 0;
4325 PerlIOMmap_map(pTHX_ PerlIO *f)
4327 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4328 IV flags = PerlIOBase(f)->flags;
4332 if (flags & PERLIO_F_CANREAD) {
4333 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4334 int fd = PerlIO_fileno(f);
4336 code = Fstat(fd, &st);
4337 if (code == 0 && S_ISREG(st.st_mode)) {
4338 SSize_t len = st.st_size - b->posn;
4342 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4344 SETERRNO(0, SS_NORMAL);
4345 # ifdef _SC_PAGESIZE
4346 page_size = sysconf(_SC_PAGESIZE);
4348 page_size = sysconf(_SC_PAGE_SIZE);
4350 if ((long) page_size < 0) {
4355 (void) SvUPGRADE(error, SVt_PV);
4356 msg = SvPVx(error, n_a);
4357 Perl_croak(aTHX_ "panic: sysconf: %s",
4362 "panic: sysconf: pagesize unknown");
4366 # ifdef HAS_GETPAGESIZE
4367 page_size = getpagesize();
4369 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4370 page_size = PAGESIZE; /* compiletime, bad */
4374 if ((IV) page_size <= 0)
4375 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4380 * This is a hack - should never happen - open should
4383 b->posn = PerlIO_tell(PerlIONext(f));
4385 posn = (b->posn / page_size) * page_size;
4386 len = st.st_size - posn;
4387 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4388 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4389 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4390 madvise(m->mptr, len, MADV_SEQUENTIAL);
4392 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4393 madvise(m->mptr, len, MADV_WILLNEED);
4395 PerlIOBase(f)->flags =
4396 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4397 b->end = ((STDCHAR *) m->mptr) + len;
4398 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4407 PerlIOBase(f)->flags =
4408 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4410 b->ptr = b->end = b->ptr;
4419 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4421 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4422 PerlIOBuf *b = &m->base;
4426 code = munmap(m->mptr, m->len);
4430 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4433 b->ptr = b->end = b->buf;
4434 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4440 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4442 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4443 PerlIOBuf *b = &m->base;
4444 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4446 * Already have a readbuffer in progress
4452 * We have a write buffer or flushed PerlIOBuf read buffer
4454 m->bbuf = b->buf; /* save it in case we need it again */
4455 b->buf = NULL; /* Clear to trigger below */
4458 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4461 * Map did not work - recover PerlIOBuf buffer if we have one
4466 b->ptr = b->end = b->buf;
4469 return PerlIOBuf_get_base(aTHX_ f);
4473 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4475 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4476 PerlIOBuf *b = &m->base;
4477 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4479 if (b->ptr && (b->ptr - count) >= b->buf
4480 && memEQ(b->ptr - count, vbuf, count)) {
4482 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4487 * Loose the unwritable mapped buffer
4491 * If flush took the "buffer" see if we have one from before
4493 if (!b->buf && m->bbuf)
4496 PerlIOBuf_get_base(aTHX_ f);
4500 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4504 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4506 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4507 PerlIOBuf *b = &m->base;
4508 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4510 * No, or wrong sort of, buffer
4513 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4517 * If unmap took the "buffer" see if we have one from before
4519 if (!b->buf && m->bbuf)
4522 PerlIOBuf_get_base(aTHX_ f);
4526 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4530 PerlIOMmap_flush(pTHX_ PerlIO *f)
4532 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4533 PerlIOBuf *b = &m->base;
4534 IV code = PerlIOBuf_flush(aTHX_ f);
4536 * Now we are "synced" at PerlIOBuf level
4543 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4548 * We seem to have a PerlIOBuf buffer which was not mapped
4549 * remember it in case we need one later
4558 PerlIOMmap_fill(pTHX_ PerlIO *f)
4560 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4561 IV code = PerlIO_flush(f);
4562 if (code == 0 && !b->buf) {
4563 code = PerlIOMmap_map(aTHX_ f);
4565 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4566 code = PerlIOBuf_fill(aTHX_ f);
4572 PerlIOMmap_close(pTHX_ PerlIO *f)
4574 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4575 PerlIOBuf *b = &m->base;
4576 IV code = PerlIO_flush(f);
4580 b->ptr = b->end = b->buf;
4582 if (PerlIOBuf_close(aTHX_ f) != 0)
4588 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4590 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4594 PerlIO_funcs PerlIO_mmap = {
4595 sizeof(PerlIO_funcs),
4598 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4602 PerlIOBase_binmode, /* binmode */
4616 PerlIOBase_clearerr,
4617 PerlIOBase_setlinebuf,
4618 PerlIOMmap_get_base,
4622 PerlIOBuf_set_ptrcnt,
4625 #endif /* HAS_MMAP */
4628 Perl_PerlIO_stdin(pTHX)
4631 PerlIO_stdstreams(aTHX);
4633 return &PL_perlio[1];
4637 Perl_PerlIO_stdout(pTHX)
4640 PerlIO_stdstreams(aTHX);
4642 return &PL_perlio[2];
4646 Perl_PerlIO_stderr(pTHX)
4649 PerlIO_stdstreams(aTHX);
4651 return &PL_perlio[3];
4654 /*--------------------------------------------------------------------------------------*/
4657 PerlIO_getname(PerlIO *f, char *buf)
4662 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4664 name = fgetname(stdio, buf);
4666 Perl_croak(aTHX_ "Don't know how to get file name");
4672 /*--------------------------------------------------------------------------------------*/
4674 * Functions which can be called on any kind of PerlIO implemented in
4678 #undef PerlIO_fdopen
4680 PerlIO_fdopen(int fd, const char *mode)
4683 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4688 PerlIO_open(const char *path, const char *mode)
4691 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4692 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4695 #undef Perlio_reopen
4697 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4700 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4701 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4706 PerlIO_getc(PerlIO *f)
4710 SSize_t count = PerlIO_read(f, buf, 1);
4712 return (unsigned char) buf[0];
4717 #undef PerlIO_ungetc
4719 PerlIO_ungetc(PerlIO *f, int ch)
4724 if (PerlIO_unread(f, &buf, 1) == 1)
4732 PerlIO_putc(PerlIO *f, int ch)
4736 return PerlIO_write(f, &buf, 1);
4741 PerlIO_puts(PerlIO *f, const char *s)
4744 STRLEN len = strlen(s);
4745 return PerlIO_write(f, s, len);
4748 #undef PerlIO_rewind
4750 PerlIO_rewind(PerlIO *f)
4753 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4757 #undef PerlIO_vprintf
4759 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4762 SV *sv = newSVpvn("", 0);
4768 Perl_va_copy(ap, apc);
4769 sv_vcatpvf(sv, fmt, &apc);
4771 sv_vcatpvf(sv, fmt, &ap);
4774 wrote = PerlIO_write(f, s, len);
4779 #undef PerlIO_printf
4781 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4786 result = PerlIO_vprintf(f, fmt, ap);
4791 #undef PerlIO_stdoutf
4793 PerlIO_stdoutf(const char *fmt, ...)
4799 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4804 #undef PerlIO_tmpfile
4806 PerlIO_tmpfile(void)
4812 GV *gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4816 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
4817 newSVpvn("File::Temp", 10), Nullsv, Nullsv, Nullsv);
4818 gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4819 GvIMPORTED_CV_on(gv);
4823 if (gv && GvCV(gv)) {
4829 if (call_sv((SV*)GvCV(gv), G_SCALAR)) {
4830 GV *gv = (GV*)SvRV(newSVsv(*PL_stack_sp--));
4831 IO *io = gv ? GvIO(gv) : 0;
4832 fd = io ? PerlIO_fileno(IoIFP(io)) : -1;
4841 f = PerlIO_fdopen(fd, "w+");
4844 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4845 PerlLIO_unlink(SvPVX(sv));
4856 #endif /* USE_SFIO */
4857 #endif /* PERLIO_IS_STDIO */
4859 /*======================================================================================*/
4861 * Now some functions in terms of above which may be needed even if we are
4862 * not in true PerlIO mode
4866 #undef PerlIO_setpos
4868 PerlIO_setpos(PerlIO *f, SV *pos)
4873 Off_t *posn = (Off_t *) SvPV(pos, len);
4874 if (f && len == sizeof(Off_t))
4875 return PerlIO_seek(f, *posn, SEEK_SET);
4877 SETERRNO(EINVAL, SS_IVCHAN);
4881 #undef PerlIO_setpos
4883 PerlIO_setpos(PerlIO *f, SV *pos)
4888 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4889 if (f && len == sizeof(Fpos_t)) {
4890 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4891 return fsetpos64(f, fpos);
4893 return fsetpos(f, fpos);
4897 SETERRNO(EINVAL, SS_IVCHAN);
4903 #undef PerlIO_getpos
4905 PerlIO_getpos(PerlIO *f, SV *pos)
4908 Off_t posn = PerlIO_tell(f);
4909 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4910 return (posn == (Off_t) - 1) ? -1 : 0;
4913 #undef PerlIO_getpos
4915 PerlIO_getpos(PerlIO *f, SV *pos)
4920 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4921 code = fgetpos64(f, &fpos);
4923 code = fgetpos(f, &fpos);
4925 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4930 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4933 vprintf(char *pat, char *args)
4935 _doprnt(pat, args, stdout);
4936 return 0; /* wrong, but perl doesn't use the return
4941 vfprintf(FILE *fd, char *pat, char *args)
4943 _doprnt(pat, args, fd);
4944 return 0; /* wrong, but perl doesn't use the return
4950 #ifndef PerlIO_vsprintf
4952 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4954 int val = vsprintf(s, fmt, ap);
4956 if (strlen(s) >= (STRLEN) n) {
4958 (void) PerlIO_puts(Perl_error_log,
4959 "panic: sprintf overflow - memory corrupted!\n");
4967 #ifndef PerlIO_sprintf
4969 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4974 result = PerlIO_vsprintf(s, n, fmt, ap);