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 * Why is this here - not in perlio.h? RMB
436 void PerlIO_debug(const char *fmt, ...)
438 __attribute__ ((__format__(__printf__, 1, 2)))
443 PerlIO_debug(const char *fmt, ...)
450 char *s = PerlEnv_getenv("PERLIO_DEBUG");
452 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
459 /* Use fixed buffer as sv_catpvf etc. needs SVs */
463 s = CopFILE(PL_curcop);
466 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
467 len = strlen(buffer);
468 vsprintf(buffer+len, fmt, ap);
469 PerlLIO_write(dbg, buffer, strlen(buffer));
471 SV *sv = newSVpvn("", 0);
474 s = CopFILE(PL_curcop);
477 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
478 (IV) CopLINE(PL_curcop));
479 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
482 PerlLIO_write(dbg, s, len);
489 /*--------------------------------------------------------------------------------------*/
492 * Inner level routines
496 * Table of pointers to the PerlIO structs (malloc'ed)
498 #define PERLIO_TABLE_SIZE 64
501 PerlIO_allocate(pTHX)
504 * Find a free slot in the table, allocating new table as necessary
509 while ((f = *last)) {
511 last = (PerlIO **) (f);
512 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
518 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
526 #undef PerlIO_fdupopen
528 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
530 if (PerlIOValid(f)) {
531 PerlIO_funcs *tab = PerlIOBase(f)->tab;
532 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
534 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
536 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
540 SETERRNO(EBADF, SS_IVCHAN);
546 PerlIO_cleantable(pTHX_ PerlIO **tablep)
548 PerlIO *table = *tablep;
551 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
552 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
553 PerlIO *f = table + i;
565 PerlIO_list_alloc(pTHX)
568 Newz('L', list, 1, PerlIO_list_t);
574 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
577 if (--list->refcnt == 0) {
580 for (i = 0; i < list->cur; i++) {
581 if (list->array[i].arg)
582 SvREFCNT_dec(list->array[i].arg);
584 Safefree(list->array);
592 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
595 if (list->cur >= list->len) {
598 Renew(list->array, list->len, PerlIO_pair_t);
600 New('l', list->array, list->len, PerlIO_pair_t);
602 p = &(list->array[list->cur++]);
604 if ((p->arg = arg)) {
610 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
612 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
615 list = PerlIO_list_alloc(aTHX);
616 for (i=0; i < proto->cur; i++) {
618 if (proto->array[i].arg)
619 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
620 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
627 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
630 PerlIO **table = &proto->Iperlio;
633 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
634 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
635 PerlIO_allocate(aTHX); /* root slot is never used */
636 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
637 while ((f = *table)) {
639 table = (PerlIO **) (f++);
640 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
642 (void) fp_dup(f, 0, param);
651 PerlIO_destruct(pTHX)
653 PerlIO **table = &PL_perlio;
656 PerlIO_debug("Destruct %p\n",aTHX);
658 while ((f = *table)) {
660 table = (PerlIO **) (f++);
661 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
665 if (l->tab->kind & PERLIO_K_DESTRUCT) {
666 PerlIO_debug("Destruct popping %s\n", l->tab->name);
680 PerlIO_pop(pTHX_ PerlIO *f)
684 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
685 if (l->tab->Popped) {
687 * If popped returns non-zero do not free its layer structure
688 * it has either done so itself, or it is shared and still in
691 if ((*l->tab->Popped) (aTHX_ f) != 0)
699 /* Return as an array the stack of layers on a filehandle. Note that
700 * the stack is returned top-first in the array, and there are three
701 * times as many array elements as there are layers in the stack: the
702 * first element of a layer triplet is the name, the second one is the
703 * arguments, and the third one is the flags. */
706 PerlIO_get_layers(pTHX_ PerlIO *f)
710 if (PerlIOValid(f)) {
711 PerlIOl *l = PerlIOBase(f);
714 SV *name = l->tab && l->tab->name ?
715 newSVpv(l->tab->name, 0) : &PL_sv_undef;
716 SV *arg = l->tab && l->tab->Getarg ?
717 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
720 av_push(av, newSViv((IV)l->flags));
728 /*--------------------------------------------------------------------------------------*/
730 * XS Interface for perl code
734 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
737 if ((SSize_t) len <= 0)
739 for (i = 0; i < PL_known_layers->cur; i++) {
740 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
741 if (memEQ(f->name, name, len)) {
742 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
746 if (load && PL_subname && PL_def_layerlist
747 && PL_def_layerlist->cur >= 2) {
748 if (PL_in_load_module) {
749 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
752 SV *pkgsv = newSVpvn("PerlIO", 6);
753 SV *layer = newSVpvn(name, len);
754 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
756 SAVEINT(PL_in_load_module);
758 SAVESPTR(PL_warnhook);
759 PL_warnhook = (SV *) cv;
763 * The two SVs are magically freed by load_module
765 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
768 return PerlIO_find_layer(aTHX_ name, len, 0);
771 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
775 #ifdef USE_ATTRIBUTES_FOR_PERLIO
778 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
781 IO *io = GvIOn((GV *) SvRV(sv));
782 PerlIO *ifp = IoIFP(io);
783 PerlIO *ofp = IoOFP(io);
784 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
790 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
793 IO *io = GvIOn((GV *) SvRV(sv));
794 PerlIO *ifp = IoIFP(io);
795 PerlIO *ofp = IoOFP(io);
796 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
802 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
804 Perl_warn(aTHX_ "clear %" SVf, sv);
809 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
811 Perl_warn(aTHX_ "free %" SVf, sv);
815 MGVTBL perlio_vtab = {
823 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
826 SV *sv = SvRV(ST(1));
831 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
833 mg = mg_find(sv, PERL_MAGIC_ext);
834 mg->mg_virtual = &perlio_vtab;
836 Perl_warn(aTHX_ "attrib %" SVf, sv);
837 for (i = 2; i < items; i++) {
839 const char *name = SvPV(ST(i), len);
840 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
842 av_push(av, SvREFCNT_inc(layer));
853 #endif /* USE_ATTIBUTES_FOR_PERLIO */
856 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
858 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
859 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
863 XS(XS_PerlIO__Layer__NoWarnings)
865 /* This is used as a %SIG{__WARN__} handler to supress warnings
866 during loading of layers.
870 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
874 XS(XS_PerlIO__Layer__find)
878 Perl_croak(aTHX_ "Usage class->find(name[,load])");
881 char *name = SvPV(ST(1), len);
882 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
883 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
885 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
892 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
894 if (!PL_known_layers)
895 PL_known_layers = PerlIO_list_alloc(aTHX);
896 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
897 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
901 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
904 const char *s = names;
906 while (isSPACE(*s) || *s == ':')
911 const char *as = Nullch;
913 if (!isIDFIRST(*s)) {
915 * Message is consistent with how attribute lists are
916 * passed. Even though this means "foo : : bar" is
917 * seen as an invalid separator character.
919 char q = ((*s == '\'') ? '"' : '\'');
920 if (ckWARN(WARN_LAYER))
921 Perl_warner(aTHX_ packWARN(WARN_LAYER),
922 "perlio: invalid separator character %c%c%c in layer specification list %s",
924 SETERRNO(EINVAL, LIB_INVARG);
929 } while (isALNUM(*e));
945 * It's a nul terminated string, not allowed
946 * to \ the terminating null. Anything other
947 * character is passed over.
957 if (ckWARN(WARN_LAYER))
958 Perl_warner(aTHX_ packWARN(WARN_LAYER),
959 "perlio: argument list not closed for layer \"%.*s\"",
971 bool warn_layer = ckWARN(WARN_LAYER);
972 PerlIO_funcs *layer =
973 PerlIO_find_layer(aTHX_ s, llen, 1);
975 PerlIO_list_push(aTHX_ av, layer,
982 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
995 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
997 PerlIO_funcs *tab = &PerlIO_perlio;
998 #ifdef PERLIO_USING_CRLF
1001 if (PerlIO_stdio.Set_ptrcnt)
1002 tab = &PerlIO_stdio;
1004 PerlIO_debug("Pushing %s\n", tab->name);
1005 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1010 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1012 return av->array[n].arg;
1016 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1018 if (n >= 0 && n < av->cur) {
1019 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1020 av->array[n].funcs->name);
1021 return av->array[n].funcs;
1024 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1029 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1031 if (PerlIOValid(f)) {
1033 PerlIO_pop(aTHX_ f);
1039 PerlIO_funcs PerlIO_remove = {
1040 sizeof(PerlIO_funcs),
1043 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1061 NULL, /* get_base */
1062 NULL, /* get_bufsiz */
1065 NULL, /* set_ptrcnt */
1069 PerlIO_default_layers(pTHX)
1071 if (!PL_def_layerlist) {
1072 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1073 PerlIO_funcs *osLayer = &PerlIO_unix;
1074 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1075 PerlIO_define_layer(aTHX_ & PerlIO_unix);
1076 #if defined(WIN32) && !defined(UNDER_CE)
1077 PerlIO_define_layer(aTHX_ & PerlIO_win32);
1079 osLayer = &PerlIO_win32;
1082 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1083 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1084 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1085 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
1087 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
1089 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
1090 PerlIO_define_layer(aTHX_ & PerlIO_remove);
1091 PerlIO_define_layer(aTHX_ & PerlIO_byte);
1092 PerlIO_list_push(aTHX_ PL_def_layerlist,
1093 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1096 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1099 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1102 if (PL_def_layerlist->cur < 2) {
1103 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1105 return PL_def_layerlist;
1109 Perl_boot_core_PerlIO(pTHX)
1111 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1112 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1115 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1116 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1120 PerlIO_default_layer(pTHX_ I32 n)
1122 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1125 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1128 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1129 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1132 PerlIO_stdstreams(pTHX)
1135 PerlIO_allocate(aTHX);
1136 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1137 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1138 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1143 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1145 if (tab->fsize != sizeof(PerlIO_funcs)) {
1147 Perl_croak(aTHX_ "Layer does not match this perl");
1151 if (tab->size < sizeof(PerlIOl)) {
1154 /* Real layer with a data area */
1155 Newc('L',l,tab->size,char,PerlIOl);
1157 Zero(l, tab->size, char);
1161 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1162 (mode) ? mode : "(Null)", (void*)arg);
1163 if (*l->tab->Pushed &&
1164 (*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1165 PerlIO_pop(aTHX_ f);
1171 /* Pseudo-layer where push does its own stack adjust */
1172 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1173 (mode) ? mode : "(Null)", (void*)arg);
1175 (*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1183 PerlIOBase_binmode(pTHX_ PerlIO *f)
1185 if (PerlIOValid(f)) {
1186 /* Is layer suitable for raw stream ? */
1187 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1188 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1189 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1192 /* Not suitable - pop it */
1193 PerlIO_pop(aTHX_ f);
1201 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1204 if (PerlIOValid(f)) {
1209 * Strip all layers that are not suitable for a raw stream
1212 while (t && (l = *t)) {
1213 if (l->tab->Binmode) {
1214 /* Has a handler - normal case */
1215 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1217 /* Layer still there - move down a layer */
1226 /* No handler - pop it */
1227 PerlIO_pop(aTHX_ t);
1230 if (PerlIOValid(f)) {
1231 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1239 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1240 PerlIO_list_t *layers, IV n, IV max)
1244 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1246 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1257 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1261 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1262 code = PerlIO_parse_layers(aTHX_ layers, names);
1264 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1266 PerlIO_list_free(aTHX_ layers);
1272 /*--------------------------------------------------------------------------------------*/
1274 * Given the abstraction above the public API functions
1278 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1280 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1281 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1282 (names) ? names : "(Null)");
1284 /* Do not flush etc. if (e.g.) switching encodings.
1285 if a pushed layer knows it needs to flush lower layers
1286 (for example :unix which is never going to call them)
1287 it can do the flush when it is pushed.
1289 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1292 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1293 #ifdef PERLIO_USING_CRLF
1294 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1295 O_BINARY so we can look for it in mode.
1297 if (!(mode & O_BINARY)) {
1299 /* FIXME?: Looking down the layer stack seems wrong,
1300 but is a way of reaching past (say) an encoding layer
1301 to flip CRLF-ness of the layer(s) below
1304 /* Perhaps we should turn on bottom-most aware layer
1305 e.g. Ilya's idea that UNIX TTY could serve
1307 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1308 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1309 /* Not in text mode - flush any pending stuff and flip it */
1311 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1313 /* Only need to turn it on in one layer so we are done */
1318 /* Not finding a CRLF aware layer presumably means we are binary
1319 which is not what was requested - so we failed
1320 We _could_ push :crlf layer but so could caller
1325 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1326 So code that used to be here is now in PerlIORaw_pushed().
1328 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1333 PerlIO__close(pTHX_ PerlIO *f)
1335 if (PerlIOValid(f)) {
1336 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1337 if (tab && tab->Close)
1338 return (*tab->Close)(aTHX_ f);
1340 return PerlIOBase_close(aTHX_ f);
1343 SETERRNO(EBADF, SS_IVCHAN);
1349 Perl_PerlIO_close(pTHX_ PerlIO *f)
1351 int code = PerlIO__close(aTHX_ f);
1352 while (PerlIOValid(f)) {
1353 PerlIO_pop(aTHX_ f);
1359 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1361 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1365 PerlIO_context_layers(pTHX_ const char *mode)
1367 const char *type = NULL;
1369 * Need to supply default layer info from open.pm
1372 SV *layers = PL_curcop->cop_io;
1375 type = SvPV(layers, len);
1376 if (type && mode[0] != 'r') {
1378 * Skip to write part
1380 const char *s = strchr(type, 0);
1381 if (s && (STRLEN)(s - type) < len) {
1390 static PerlIO_funcs *
1391 PerlIO_layer_from_ref(pTHX_ SV *sv)
1394 * For any scalar type load the handler which is bundled with perl
1396 if (SvTYPE(sv) < SVt_PVAV)
1397 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1400 * For other types allow if layer is known but don't try and load it
1402 switch (SvTYPE(sv)) {
1404 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1406 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1408 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1410 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1416 PerlIO_resolve_layers(pTHX_ const char *layers,
1417 const char *mode, int narg, SV **args)
1419 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1422 PerlIO_stdstreams(aTHX);
1426 * If it is a reference but not an object see if we have a handler
1429 if (SvROK(arg) && !sv_isobject(arg)) {
1430 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1432 def = PerlIO_list_alloc(aTHX);
1433 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1437 * Don't fail if handler cannot be found :via(...) etc. may do
1438 * something sensible else we will just stringfy and open
1444 layers = PerlIO_context_layers(aTHX_ mode);
1445 if (layers && *layers) {
1449 av = PerlIO_list_alloc(aTHX);
1450 for (i = 0; i < def->cur; i++) {
1451 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1458 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1462 PerlIO_list_free(aTHX_ av);
1463 return (PerlIO_list_t *) NULL;
1474 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1475 int imode, int perm, PerlIO *f, int narg, SV **args)
1477 if (!f && narg == 1 && *args == &PL_sv_undef) {
1478 if ((f = PerlIO_tmpfile())) {
1480 layers = PerlIO_context_layers(aTHX_ mode);
1481 if (layers && *layers)
1482 PerlIO_apply_layers(aTHX_ f, mode, layers);
1486 PerlIO_list_t *layera = NULL;
1488 PerlIO_funcs *tab = NULL;
1489 if (PerlIOValid(f)) {
1491 * This is "reopen" - it is not tested as perl does not use it
1495 layera = PerlIO_list_alloc(aTHX);
1497 SV *arg = (l->tab->Getarg)
1498 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1500 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1501 l = *PerlIONext(&l);
1505 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1511 * Start at "top" of layer stack
1513 n = layera->cur - 1;
1515 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1524 * Found that layer 'n' can do opens - call it
1526 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1527 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1529 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1530 tab->name, layers, mode, fd, imode, perm,
1531 (void*)f, narg, (void*)args);
1533 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1536 SETERRNO(EINVAL, LIB_INVARG);
1540 if (n + 1 < layera->cur) {
1542 * More layers above the one that we used to open -
1545 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1546 /* If pushing layers fails close the file */
1553 PerlIO_list_free(aTHX_ layera);
1560 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1562 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1566 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1568 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1572 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1574 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1578 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1580 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1584 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1586 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1590 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1594 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1596 if (tab && tab->Flush)
1597 return (*tab->Flush) (aTHX_ f);
1599 return 0; /* If no Flush defined, silently succeed. */
1602 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1603 SETERRNO(EBADF, SS_IVCHAN);
1609 * Is it good API design to do flush-all on NULL, a potentially
1610 * errorneous input? Maybe some magical value (PerlIO*
1611 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1612 * things on fflush(NULL), but should we be bound by their design
1615 PerlIO **table = &PL_perlio;
1617 while ((f = *table)) {
1619 table = (PerlIO **) (f++);
1620 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1621 if (*f && PerlIO_flush(f) != 0)
1631 PerlIOBase_flush_linebuf(pTHX)
1633 PerlIO **table = &PL_perlio;
1635 while ((f = *table)) {
1637 table = (PerlIO **) (f++);
1638 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1641 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1642 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1650 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1652 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1656 PerlIO_isutf8(PerlIO *f)
1659 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1661 SETERRNO(EBADF, SS_IVCHAN);
1667 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1669 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1673 Perl_PerlIO_error(pTHX_ PerlIO *f)
1675 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1679 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1681 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1685 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1687 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1691 PerlIO_has_base(PerlIO *f)
1693 if (PerlIOValid(f)) {
1694 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1697 return (tab->Get_base != NULL);
1698 SETERRNO(EINVAL, LIB_INVARG);
1701 SETERRNO(EBADF, SS_IVCHAN);
1707 PerlIO_fast_gets(PerlIO *f)
1709 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1710 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1713 return (tab->Set_ptrcnt != NULL);
1714 SETERRNO(EINVAL, LIB_INVARG);
1717 SETERRNO(EBADF, SS_IVCHAN);
1723 PerlIO_has_cntptr(PerlIO *f)
1725 if (PerlIOValid(f)) {
1726 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1729 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1730 SETERRNO(EINVAL, LIB_INVARG);
1733 SETERRNO(EBADF, SS_IVCHAN);
1739 PerlIO_canset_cnt(PerlIO *f)
1741 if (PerlIOValid(f)) {
1742 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1745 return (tab->Set_ptrcnt != NULL);
1746 SETERRNO(EINVAL, LIB_INVARG);
1749 SETERRNO(EBADF, SS_IVCHAN);
1755 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1757 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1761 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1763 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1767 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1769 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1773 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1775 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1779 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1781 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1785 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1787 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1791 /*--------------------------------------------------------------------------------------*/
1793 * utf8 and raw dummy layers
1797 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1799 if (PerlIOValid(f)) {
1800 if (tab->kind & PERLIO_K_UTF8)
1801 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1803 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1809 PerlIO_funcs PerlIO_utf8 = {
1810 sizeof(PerlIO_funcs),
1813 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1831 NULL, /* get_base */
1832 NULL, /* get_bufsiz */
1835 NULL, /* set_ptrcnt */
1838 PerlIO_funcs PerlIO_byte = {
1839 sizeof(PerlIO_funcs),
1860 NULL, /* get_base */
1861 NULL, /* get_bufsiz */
1864 NULL, /* set_ptrcnt */
1868 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1869 IV n, const char *mode, int fd, int imode, int perm,
1870 PerlIO *old, int narg, SV **args)
1872 PerlIO_funcs *tab = PerlIO_default_btm();
1873 if (tab && tab->Open)
1874 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1876 SETERRNO(EINVAL, LIB_INVARG);
1880 PerlIO_funcs PerlIO_raw = {
1881 sizeof(PerlIO_funcs),
1902 NULL, /* get_base */
1903 NULL, /* get_bufsiz */
1906 NULL, /* set_ptrcnt */
1908 /*--------------------------------------------------------------------------------------*/
1909 /*--------------------------------------------------------------------------------------*/
1911 * "Methods" of the "base class"
1915 PerlIOBase_fileno(pTHX_ PerlIO *f)
1917 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1921 PerlIO_modestr(PerlIO * f, char *buf)
1924 if (PerlIOValid(f)) {
1925 IV flags = PerlIOBase(f)->flags;
1926 if (flags & PERLIO_F_APPEND) {
1928 if (flags & PERLIO_F_CANREAD) {
1932 else if (flags & PERLIO_F_CANREAD) {
1934 if (flags & PERLIO_F_CANWRITE)
1937 else if (flags & PERLIO_F_CANWRITE) {
1939 if (flags & PERLIO_F_CANREAD) {
1943 #ifdef PERLIO_USING_CRLF
1944 if (!(flags & PERLIO_F_CRLF))
1954 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1956 PerlIOl *l = PerlIOBase(f);
1958 const char *omode = mode;
1961 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1962 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1963 if (tab->Set_ptrcnt != NULL)
1964 l->flags |= PERLIO_F_FASTGETS;
1966 if (*mode == '#' || *mode == 'I')
1970 l->flags |= PERLIO_F_CANREAD;
1973 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1976 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1979 SETERRNO(EINVAL, LIB_INVARG);
1985 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1988 l->flags &= ~PERLIO_F_CRLF;
1991 l->flags |= PERLIO_F_CRLF;
1994 SETERRNO(EINVAL, LIB_INVARG);
2001 l->flags |= l->next->flags &
2002 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2007 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2008 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2009 l->flags, PerlIO_modestr(f, temp));
2015 PerlIOBase_popped(pTHX_ PerlIO *f)
2021 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2024 * Save the position as current head considers it
2026 Off_t old = PerlIO_tell(f);
2028 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2029 PerlIOSelf(f, PerlIOBuf)->posn = old;
2030 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
2035 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2037 STDCHAR *buf = (STDCHAR *) vbuf;
2039 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2042 SSize_t avail = PerlIO_get_cnt(f);
2045 take = ((SSize_t)count < avail) ? count : avail;
2047 STDCHAR *ptr = PerlIO_get_ptr(f);
2048 Copy(ptr, buf, take, STDCHAR);
2049 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2053 if (count > 0 && avail <= 0) {
2054 if (PerlIO_fill(f) != 0)
2058 return (buf - (STDCHAR *) vbuf);
2064 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2070 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2076 PerlIOBase_close(pTHX_ PerlIO *f)
2079 if (PerlIOValid(f)) {
2080 PerlIO *n = PerlIONext(f);
2081 code = PerlIO_flush(f);
2082 PerlIOBase(f)->flags &=
2083 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2084 while (PerlIOValid(n)) {
2085 PerlIO_funcs *tab = PerlIOBase(n)->tab;
2086 if (tab && tab->Close) {
2087 if ((*tab->Close)(aTHX_ n) != 0)
2092 PerlIOBase(n)->flags &=
2093 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2099 SETERRNO(EBADF, SS_IVCHAN);
2105 PerlIOBase_eof(pTHX_ PerlIO *f)
2107 if (PerlIOValid(f)) {
2108 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2114 PerlIOBase_error(pTHX_ PerlIO *f)
2116 if (PerlIOValid(f)) {
2117 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2123 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2125 if (PerlIOValid(f)) {
2126 PerlIO *n = PerlIONext(f);
2127 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2134 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2136 if (PerlIOValid(f)) {
2137 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2142 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2148 return sv_dup(arg, param);
2151 return newSVsv(arg);
2154 return newSVsv(arg);
2159 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2161 PerlIO *nexto = PerlIONext(o);
2162 if (PerlIOValid(nexto)) {
2163 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2164 if (tab && tab->Dup)
2165 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2167 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2170 PerlIO_funcs *self = PerlIOBase(o)->tab;
2173 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2174 self->name, (void*)f, (void*)o, (void*)param);
2176 arg = (*self->Getarg)(aTHX_ o, param, flags);
2180 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2188 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2190 perl_mutex PerlIO_mutex;
2192 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2197 /* Place holder for stdstreams call ??? */
2199 MUTEX_INIT(&PerlIO_mutex);
2204 PerlIOUnix_refcnt_inc(int fd)
2206 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2208 MUTEX_LOCK(&PerlIO_mutex);
2210 PerlIO_fd_refcnt[fd]++;
2211 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2213 MUTEX_UNLOCK(&PerlIO_mutex);
2219 PerlIOUnix_refcnt_dec(int fd)
2222 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2224 MUTEX_LOCK(&PerlIO_mutex);
2226 cnt = --PerlIO_fd_refcnt[fd];
2227 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2229 MUTEX_UNLOCK(&PerlIO_mutex);
2236 PerlIO_cleanup(pTHX)
2240 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2242 PerlIO_debug("Cleanup layers\n");
2244 /* Raise STDIN..STDERR refcount so we don't close them */
2245 for (i=0; i < 3; i++)
2246 PerlIOUnix_refcnt_inc(i);
2247 PerlIO_cleantable(aTHX_ &PL_perlio);
2248 /* Restore STDIN..STDERR refcount */
2249 for (i=0; i < 3; i++)
2250 PerlIOUnix_refcnt_dec(i);
2252 if (PL_known_layers) {
2253 PerlIO_list_free(aTHX_ PL_known_layers);
2254 PL_known_layers = NULL;
2256 if(PL_def_layerlist) {
2257 PerlIO_list_free(aTHX_ PL_def_layerlist);
2258 PL_def_layerlist = NULL;
2264 /*--------------------------------------------------------------------------------------*/
2266 * Bottom-most level for UNIX-like case
2270 struct _PerlIO base; /* The generic part */
2271 int fd; /* UNIX like file descriptor */
2272 int oflags; /* open/fcntl flags */
2276 PerlIOUnix_oflags(const char *mode)
2279 if (*mode == 'I' || *mode == '#')
2284 if (*++mode == '+') {
2291 oflags = O_CREAT | O_TRUNC;
2292 if (*++mode == '+') {
2301 oflags = O_CREAT | O_APPEND;
2302 if (*++mode == '+') {
2315 else if (*mode == 't') {
2317 oflags &= ~O_BINARY;
2321 * Always open in binary mode
2324 if (*mode || oflags == -1) {
2325 SETERRNO(EINVAL, LIB_INVARG);
2332 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2334 return PerlIOSelf(f, PerlIOUnix)->fd;
2338 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2340 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2343 if (PerlLIO_fstat(fd, &st) == 0) {
2344 if (!S_ISREG(st.st_mode)) {
2345 PerlIO_debug("%d is not regular file\n",fd);
2346 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2349 PerlIO_debug("%d _is_ a regular file\n",fd);
2355 PerlIOUnix_refcnt_inc(fd);
2359 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2361 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2362 if (*PerlIONext(f)) {
2363 /* We never call down so do any pending stuff now */
2364 PerlIO_flush(PerlIONext(f));
2366 * XXX could (or should) we retrieve the oflags from the open file
2367 * handle rather than believing the "mode" we are passed in? XXX
2368 * Should the value on NULL mode be 0 or -1?
2370 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2371 mode ? PerlIOUnix_oflags(mode) : -1);
2373 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2379 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2380 IV n, const char *mode, int fd, int imode,
2381 int perm, PerlIO *f, int narg, SV **args)
2383 if (PerlIOValid(f)) {
2384 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2385 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2388 char *path = SvPV_nolen(*args);
2392 imode = PerlIOUnix_oflags(mode);
2396 fd = PerlLIO_open3(path, imode, perm);
2403 f = PerlIO_allocate(aTHX);
2405 if (!PerlIOValid(f)) {
2406 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2410 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2411 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2417 * FIXME: pop layers ???
2425 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2427 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2429 if (flags & PERLIO_DUP_FD) {
2430 fd = PerlLIO_dup(fd);
2432 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2433 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2435 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2436 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2445 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2447 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2448 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2449 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2453 SSize_t len = PerlLIO_read(fd, vbuf, count);
2454 if (len >= 0 || errno != EINTR) {
2456 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2457 else if (len == 0 && count != 0)
2458 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2466 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2468 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2470 SSize_t len = PerlLIO_write(fd, vbuf, count);
2471 if (len >= 0 || errno != EINTR) {
2473 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2481 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2483 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2485 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2487 SETERRNO(ESPIPE, LIB_INVARG);
2489 SETERRNO(EINVAL, LIB_INVARG);
2493 new = PerlLIO_lseek(fd, offset, whence);
2494 if (new == (Off_t) - 1)
2498 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2503 PerlIOUnix_tell(pTHX_ PerlIO *f)
2505 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2510 PerlIOUnix_close(pTHX_ PerlIO *f)
2512 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2514 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2515 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2516 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2521 SETERRNO(EBADF,SS_IVCHAN);
2524 while (PerlLIO_close(fd) != 0) {
2525 if (errno != EINTR) {
2532 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2537 PerlIO_funcs PerlIO_unix = {
2538 sizeof(PerlIO_funcs),
2545 PerlIOBase_binmode, /* binmode */
2555 PerlIOBase_noop_ok, /* flush */
2556 PerlIOBase_noop_fail, /* fill */
2559 PerlIOBase_clearerr,
2560 PerlIOBase_setlinebuf,
2561 NULL, /* get_base */
2562 NULL, /* get_bufsiz */
2565 NULL, /* set_ptrcnt */
2568 /*--------------------------------------------------------------------------------------*/
2573 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2574 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2575 broken by the last second glibc 2.3 fix
2577 #define STDIO_BUFFER_WRITABLE
2582 struct _PerlIO base;
2583 FILE *stdio; /* The stream */
2587 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2590 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2591 return PerlSIO_fileno(s);
2598 PerlIOStdio_mode(const char *mode, char *tmode)
2604 #ifdef PERLIO_USING_CRLF
2612 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2615 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2616 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2617 if (toptab == tab) {
2618 /* Top is already stdio - pop self (duplicate) and use original */
2619 PerlIO_pop(aTHX_ f);
2622 int fd = PerlIO_fileno(n);
2625 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2626 mode = PerlIOStdio_mode(mode, tmode)))) {
2627 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2628 /* We never call down so do any pending stuff now */
2629 PerlIO_flush(PerlIONext(f));
2636 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2641 PerlIO_importFILE(FILE *stdio, const char *mode)
2647 if (!mode || !*mode) {
2648 /* We need to probe to see how we can open the stream
2649 so start with read/write and then try write and read
2650 we dup() so that we can fclose without loosing the fd.
2652 Note that the errno value set by a failing fdopen
2653 varies between stdio implementations.
2655 int fd = PerlLIO_dup(fileno(stdio));
2656 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2658 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2661 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2664 /* Don't seem to be able to open */
2670 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2671 s = PerlIOSelf(f, PerlIOStdio);
2679 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2680 IV n, const char *mode, int fd, int imode,
2681 int perm, PerlIO *f, int narg, SV **args)
2684 if (PerlIOValid(f)) {
2685 char *path = SvPV_nolen(*args);
2686 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2688 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2689 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2694 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2699 char *path = SvPV_nolen(*args);
2702 fd = PerlLIO_open3(path, imode, perm);
2705 FILE *stdio = PerlSIO_fopen(path, mode);
2709 f = PerlIO_allocate(aTHX);
2711 if ((f = PerlIO_push(aTHX_ f, self,
2712 (mode = PerlIOStdio_mode(mode, tmode)),
2714 s = PerlIOSelf(f, PerlIOStdio);
2716 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2735 stdio = PerlSIO_stdin;
2738 stdio = PerlSIO_stdout;
2741 stdio = PerlSIO_stderr;
2746 stdio = PerlSIO_fdopen(fd, mode =
2747 PerlIOStdio_mode(mode, tmode));
2752 f = PerlIO_allocate(aTHX);
2754 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2755 s = PerlIOSelf(f, PerlIOStdio);
2757 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2767 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2769 /* This assumes no layers underneath - which is what
2770 happens, but is not how I remember it. NI-S 2001/10/16
2772 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2773 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2774 int fd = fileno(stdio);
2776 if (flags & PERLIO_DUP_FD) {
2777 int dfd = PerlLIO_dup(fileno(stdio));
2779 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2783 /* FIXME: To avoid messy error recovery if dup fails
2784 re-use the existing stdio as though flag was not set
2788 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2790 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2791 PerlIOUnix_refcnt_inc(fileno(stdio));
2797 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2799 /* XXX this could use PerlIO_canset_fileno() and
2800 * PerlIO_set_fileno() support from Configure
2802 # if defined(__GLIBC__)
2803 /* There may be a better way for GLIBC:
2804 - libio.h defines a flag to not close() on cleanup
2808 # elif defined(__sun__)
2810 /* On solaris, if _LP64 is defined, the FILE structure is this:
2816 * It turns out that the fd is stored in the top 32 bits of
2817 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2818 * to contain a pointer or offset into another structure. All the
2819 * remaining fields are zero.
2821 * We set the top bits to -1 (0xFFFFFFFF).
2823 f->__pad[4] |= 0xffffffff00000000L;
2824 assert(fileno(f) == 0xffffffff);
2825 # else /* !defined(_LP64) */
2826 /* _file is just a unsigned char :-(
2827 Not clear why we dup() rather than using -1
2828 even if that would be treated as 0xFF - so will
2831 f->_file = PerlLIO_dup(fileno(f));
2832 # endif /* defined(_LP64) */
2834 # elif defined(__hpux)
2838 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2839 your platform does not have special entry try this one.
2840 [For OSF only have confirmation for Tru64 (alpha)
2841 but assume other OSFs will be similar.]
2843 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2846 # elif defined(__FreeBSD__)
2847 /* There may be a better way on FreeBSD:
2848 - we could insert a dummy func in the _close function entry
2849 f->_close = (int (*)(void *)) dummy_close;
2853 # elif defined(__CYGWIN__)
2854 /* There may be a better way on CYGWIN:
2855 - we could insert a dummy func in the _close function entry
2856 f->_close = (int (*)(void *)) dummy_close;
2860 # elif defined(WIN32)
2861 # if defined(__BORLANDC__)
2862 f->fd = PerlLIO_dup(fileno(f));
2863 # elif defined(UNDER_CE)
2864 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2873 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2874 (which isn't thread safe) instead
2876 # error "Don't know how to set FILE.fileno on your platform"
2883 PerlIOStdio_close(pTHX_ PerlIO *f)
2885 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2891 int fd = fileno(stdio);
2897 #ifdef SOCKS5_VERSION_NAME
2898 /* Socks lib overrides close() but stdio isn't linked to
2899 that library (though we are) - so we must call close()
2900 on sockets on stdio's behalf.
2903 Sock_size_t optlen = sizeof(int);
2904 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2909 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2910 /* File descriptor still in use */
2915 /* For STD* handles don't close the stdio at all
2916 this is because we have shared the FILE * too
2918 if (stdio == stdin) {
2919 /* Some stdios are buggy fflush-ing inputs */
2922 else if (stdio == stdout || stdio == stderr) {
2923 return PerlIO_flush(f);
2925 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2926 Use Sarathy's trick from maint-5.6 to invalidate the
2927 fileno slot of the FILE *
2929 result = PerlIO_flush(f);
2931 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
2932 dupfd = PerlLIO_dup(fd);
2935 result = PerlSIO_fclose(stdio);
2936 /* We treat error from stdio as success if we invalidated
2937 errno may NOT be expected EBADF
2939 if (invalidate && result != 0) {
2944 /* in SOCKS case let close() determine return value */
2948 PerlLIO_dup2(dupfd,fd);
2956 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2958 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2962 STDCHAR *buf = (STDCHAR *) vbuf;
2964 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2965 * stdio does not do that for fread()
2967 int ch = PerlSIO_fgetc(s);
2974 got = PerlSIO_fread(vbuf, 1, count, s);
2975 if (got || errno != EINTR)
2978 errno = 0; /* just in case */
2984 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2987 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2989 #ifdef STDIO_BUFFER_WRITABLE
2990 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2991 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2992 STDCHAR *base = PerlIO_get_base(f);
2993 SSize_t cnt = PerlIO_get_cnt(f);
2994 STDCHAR *ptr = PerlIO_get_ptr(f);
2995 SSize_t avail = ptr - base;
2997 if (avail > count) {
3001 Move(buf-avail,ptr,avail,STDCHAR);
3004 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3005 if (PerlSIO_feof(s) && unread >= 0)
3006 PerlSIO_clearerr(s);
3011 if (PerlIO_has_cntptr(f)) {
3012 /* We can get pointer to buffer but not its base
3013 Do ungetc() but check chars are ending up in the
3016 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3017 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3019 int ch = *--buf & 0xFF;
3020 if (ungetc(ch,s) != ch) {
3021 /* ungetc did not work */
3024 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3025 /* Did not change pointer as expected */
3026 fgetc(s); /* get char back again */
3036 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3042 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3046 got = PerlSIO_fwrite(vbuf, 1, count,
3047 PerlIOSelf(f, PerlIOStdio)->stdio);
3048 if (got || errno != EINTR)
3051 errno = 0; /* just in case */
3057 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3059 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3060 return PerlSIO_fseek(stdio, offset, whence);
3064 PerlIOStdio_tell(pTHX_ PerlIO *f)
3066 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3067 return PerlSIO_ftell(stdio);
3071 PerlIOStdio_flush(pTHX_ PerlIO *f)
3073 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3074 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3075 return PerlSIO_fflush(stdio);
3080 * FIXME: This discards ungetc() and pre-read stuff which is not
3081 * right if this is just a "sync" from a layer above Suspect right
3082 * design is to do _this_ but not have layer above flush this
3083 * layer read-to-read
3086 * Not writeable - sync by attempting a seek
3089 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3097 PerlIOStdio_eof(pTHX_ PerlIO *f)
3099 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3103 PerlIOStdio_error(pTHX_ PerlIO *f)
3105 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3109 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3111 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3115 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3117 #ifdef HAS_SETLINEBUF
3118 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3120 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3126 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3128 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3129 return (STDCHAR*)PerlSIO_get_base(stdio);
3133 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3135 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3136 return PerlSIO_get_bufsiz(stdio);
3140 #ifdef USE_STDIO_PTR
3142 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3144 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3145 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3149 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3151 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3152 return PerlSIO_get_cnt(stdio);
3156 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3158 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3160 #ifdef STDIO_PTR_LVALUE
3161 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3162 #ifdef STDIO_PTR_LVAL_SETS_CNT
3163 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3164 assert(PerlSIO_get_cnt(stdio) == (cnt));
3167 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3169 * Setting ptr _does_ change cnt - we are done
3173 #else /* STDIO_PTR_LVALUE */
3175 #endif /* STDIO_PTR_LVALUE */
3178 * Now (or only) set cnt
3180 #ifdef STDIO_CNT_LVALUE
3181 PerlSIO_set_cnt(stdio, cnt);
3182 #else /* STDIO_CNT_LVALUE */
3183 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3184 PerlSIO_set_ptr(stdio,
3185 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3187 #else /* STDIO_PTR_LVAL_SETS_CNT */
3189 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3190 #endif /* STDIO_CNT_LVALUE */
3197 PerlIOStdio_fill(pTHX_ PerlIO *f)
3199 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3202 * fflush()ing read-only streams can cause trouble on some stdio-s
3204 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3205 if (PerlSIO_fflush(stdio) != 0)
3208 c = PerlSIO_fgetc(stdio);
3212 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3214 #ifdef STDIO_BUFFER_WRITABLE
3215 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3216 /* Fake ungetc() to the real buffer in case system's ungetc
3219 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3220 SSize_t cnt = PerlSIO_get_cnt(stdio);
3221 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3222 if (ptr == base+1) {
3223 *--ptr = (STDCHAR) c;
3224 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3225 if (PerlSIO_feof(stdio))
3226 PerlSIO_clearerr(stdio);
3232 if (PerlIO_has_cntptr(f)) {
3234 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3241 /* An ungetc()d char is handled separately from the regular
3242 * buffer, so we stuff it in the buffer ourselves.
3243 * Should never get called as should hit code above
3245 *(--((*stdio)->_ptr)) = (unsigned char) c;
3248 /* If buffer snoop scheme above fails fall back to
3251 if (PerlSIO_ungetc(c, stdio) != c)
3259 PerlIO_funcs PerlIO_stdio = {
3260 sizeof(PerlIO_funcs),
3262 sizeof(PerlIOStdio),
3263 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3267 PerlIOBase_binmode, /* binmode */
3281 PerlIOStdio_clearerr,
3282 PerlIOStdio_setlinebuf,
3284 PerlIOStdio_get_base,
3285 PerlIOStdio_get_bufsiz,
3290 #ifdef USE_STDIO_PTR
3291 PerlIOStdio_get_ptr,
3292 PerlIOStdio_get_cnt,
3293 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3294 PerlIOStdio_set_ptrcnt,
3297 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3302 #endif /* USE_STDIO_PTR */
3305 /* Note that calls to PerlIO_exportFILE() are reversed using
3306 * PerlIO_releaseFILE(), not importFILE. */
3308 PerlIO_exportFILE(PerlIO * f, const char *mode)
3312 if (PerlIOValid(f)) {
3315 if (!mode || !*mode) {
3316 mode = PerlIO_modestr(f, buf);
3318 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3321 /* De-link any lower layers so new :stdio sticks */
3323 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3324 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3326 /* Link previous lower layers under new one */
3330 /* restore layers list */
3340 PerlIO_findFILE(PerlIO *f)
3344 if (l->tab == &PerlIO_stdio) {
3345 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3348 l = *PerlIONext(&l);
3350 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3351 return PerlIO_exportFILE(f, Nullch);
3354 /* Use this to reverse PerlIO_exportFILE calls. */
3356 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3360 if (l->tab == &PerlIO_stdio) {
3361 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3362 if (s->stdio == f) {
3364 PerlIO_pop(aTHX_ p);
3373 /*--------------------------------------------------------------------------------------*/
3375 * perlio buffer layer
3379 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3381 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3382 int fd = PerlIO_fileno(f);
3383 if (fd >= 0 && PerlLIO_isatty(fd)) {
3384 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3386 if (*PerlIONext(f)) {
3387 Off_t posn = PerlIO_tell(PerlIONext(f));
3388 if (posn != (Off_t) - 1) {
3392 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3396 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3397 IV n, const char *mode, int fd, int imode, int perm,
3398 PerlIO *f, int narg, SV **args)
3400 if (PerlIOValid(f)) {
3401 PerlIO *next = PerlIONext(f);
3402 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3403 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3405 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3410 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3418 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3421 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3423 * if push fails during open, open fails. close will pop us.
3428 fd = PerlIO_fileno(f);
3429 if (init && fd == 2) {
3431 * Initial stderr is unbuffered
3433 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3435 #ifdef PERLIO_USING_CRLF
3436 # ifdef PERLIO_IS_BINMODE_FD
3437 if (PERLIO_IS_BINMODE_FD(fd))
3438 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3442 * do something about failing setmode()? --jhi
3444 PerlLIO_setmode(fd, O_BINARY);
3453 * This "flush" is akin to sfio's sync in that it handles files in either
3454 * read or write state
3457 PerlIOBuf_flush(pTHX_ PerlIO *f)
3459 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3461 PerlIO *n = PerlIONext(f);
3462 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3464 * write() the buffer
3466 STDCHAR *buf = b->buf;
3468 while (p < b->ptr) {
3469 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3473 else if (count < 0 || PerlIO_error(n)) {
3474 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3479 b->posn += (p - buf);
3481 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3482 STDCHAR *buf = PerlIO_get_base(f);
3484 * Note position change
3486 b->posn += (b->ptr - buf);
3487 if (b->ptr < b->end) {
3488 /* We did not consume all of it - try and seek downstream to
3489 our logical position
3491 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3492 /* Reload n as some layers may pop themselves on seek */
3493 b->posn = PerlIO_tell(n = PerlIONext(f));
3496 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3497 data is lost for good - so return saying "ok" having undone
3500 b->posn -= (b->ptr - buf);
3505 b->ptr = b->end = b->buf;
3506 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3507 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3508 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3514 PerlIOBuf_fill(pTHX_ PerlIO *f)
3516 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3517 PerlIO *n = PerlIONext(f);
3520 * Down-stream flush is defined not to loose read data so is harmless.
3521 * we would not normally be fill'ing if there was data left in anycase.
3523 if (PerlIO_flush(f) != 0)
3525 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3526 PerlIOBase_flush_linebuf(aTHX);
3529 PerlIO_get_base(f); /* allocate via vtable */
3531 b->ptr = b->end = b->buf;
3533 if (!PerlIOValid(n)) {
3534 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3538 if (PerlIO_fast_gets(n)) {
3540 * Layer below is also buffered. We do _NOT_ want to call its
3541 * ->Read() because that will loop till it gets what we asked for
3542 * which may hang on a pipe etc. Instead take anything it has to
3543 * hand, or ask it to fill _once_.
3545 avail = PerlIO_get_cnt(n);
3547 avail = PerlIO_fill(n);
3549 avail = PerlIO_get_cnt(n);
3551 if (!PerlIO_error(n) && PerlIO_eof(n))
3556 STDCHAR *ptr = PerlIO_get_ptr(n);
3557 SSize_t cnt = avail;
3558 if (avail > (SSize_t)b->bufsiz)
3560 Copy(ptr, b->buf, avail, STDCHAR);
3561 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3565 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3569 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3571 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3574 b->end = b->buf + avail;
3575 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3580 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3582 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3583 if (PerlIOValid(f)) {
3586 return PerlIOBase_read(aTHX_ f, vbuf, count);
3592 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3594 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3595 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3598 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3603 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3605 * Buffer is already a read buffer, we can overwrite any chars
3606 * which have been read back to buffer start
3608 avail = (b->ptr - b->buf);
3612 * Buffer is idle, set it up so whole buffer is available for
3616 b->end = b->buf + avail;
3618 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3620 * Buffer extends _back_ from where we are now
3622 b->posn -= b->bufsiz;
3624 if (avail > (SSize_t) count) {
3626 * If we have space for more than count, just move count
3634 * In simple stdio-like ungetc() case chars will be already
3637 if (buf != b->ptr) {
3638 Copy(buf, b->ptr, avail, STDCHAR);
3642 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3646 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3652 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3654 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3655 const STDCHAR *buf = (const STDCHAR *) vbuf;
3659 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3661 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3662 if (PerlIO_flush(f) != 0) {
3667 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3668 if ((SSize_t) count < avail)
3670 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3671 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3686 Copy(buf, b->ptr, avail, STDCHAR);
3693 if (b->ptr >= (b->buf + b->bufsiz))
3696 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3702 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3705 if ((code = PerlIO_flush(f)) == 0) {
3706 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3707 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3708 code = PerlIO_seek(PerlIONext(f), offset, whence);
3710 b->posn = PerlIO_tell(PerlIONext(f));
3717 PerlIOBuf_tell(pTHX_ PerlIO *f)
3719 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3721 * b->posn is file position where b->buf was read, or will be written
3723 Off_t posn = b->posn;
3724 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3725 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3727 /* As O_APPEND files are normally shared in some sense it is better
3732 /* when file is NOT shared then this is sufficient */
3733 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3735 posn = b->posn = PerlIO_tell(PerlIONext(f));
3739 * If buffer is valid adjust position by amount in buffer
3741 posn += (b->ptr - b->buf);
3747 PerlIOBuf_popped(pTHX_ PerlIO *f)
3749 IV code = PerlIOBase_popped(aTHX_ f);
3750 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3751 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3755 b->ptr = b->end = b->buf;
3756 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3761 PerlIOBuf_close(pTHX_ PerlIO *f)
3763 IV code = PerlIOBase_close(aTHX_ f);
3764 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3765 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3769 b->ptr = b->end = b->buf;
3770 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3775 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3777 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3784 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3786 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3789 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3790 return (b->end - b->ptr);
3795 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3797 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3802 Newz('B',b->buf,b->bufsiz, STDCHAR);
3804 b->buf = (STDCHAR *) & b->oneword;
3805 b->bufsiz = sizeof(b->oneword);
3814 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3816 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3819 return (b->end - b->buf);
3823 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3825 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3829 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3830 assert(PerlIO_get_cnt(f) == cnt);
3831 assert(b->ptr >= b->buf);
3833 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3837 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3839 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3844 PerlIO_funcs PerlIO_perlio = {
3845 sizeof(PerlIO_funcs),
3848 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3852 PerlIOBase_binmode, /* binmode */
3866 PerlIOBase_clearerr,
3867 PerlIOBase_setlinebuf,
3872 PerlIOBuf_set_ptrcnt,
3875 /*--------------------------------------------------------------------------------------*/
3877 * Temp layer to hold unread chars when cannot do it any other way
3881 PerlIOPending_fill(pTHX_ PerlIO *f)
3884 * Should never happen
3891 PerlIOPending_close(pTHX_ PerlIO *f)
3894 * A tad tricky - flush pops us, then we close new top
3897 return PerlIO_close(f);
3901 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3904 * A tad tricky - flush pops us, then we seek new top
3907 return PerlIO_seek(f, offset, whence);
3912 PerlIOPending_flush(pTHX_ PerlIO *f)
3914 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3915 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3919 PerlIO_pop(aTHX_ f);
3924 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3930 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3935 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3937 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3938 PerlIOl *l = PerlIOBase(f);
3940 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3941 * etc. get muddled when it changes mid-string when we auto-pop.
3943 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3944 (PerlIOBase(PerlIONext(f))->
3945 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3950 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3952 SSize_t avail = PerlIO_get_cnt(f);
3954 if ((SSize_t)count < avail)
3957 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3958 if (got >= 0 && got < (SSize_t)count) {
3960 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3961 if (more >= 0 || got == 0)
3967 PerlIO_funcs PerlIO_pending = {
3968 sizeof(PerlIO_funcs),
3971 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3972 PerlIOPending_pushed,
3975 PerlIOBase_binmode, /* binmode */
3984 PerlIOPending_close,
3985 PerlIOPending_flush,
3989 PerlIOBase_clearerr,
3990 PerlIOBase_setlinebuf,
3995 PerlIOPending_set_ptrcnt,
4000 /*--------------------------------------------------------------------------------------*/
4002 * crlf - translation On read translate CR,LF to "\n" we do this by
4003 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4004 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4008 PerlIOBuf base; /* PerlIOBuf stuff */
4009 STDCHAR *nl; /* Position of crlf we "lied" about in the
4014 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4017 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4018 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4020 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4021 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4022 PerlIOBase(f)->flags);
4029 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4031 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4036 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4037 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4039 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4040 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4042 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4047 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4048 b->end = b->ptr = b->buf + b->bufsiz;
4049 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4050 b->posn -= b->bufsiz;
4052 while (count > 0 && b->ptr > b->buf) {
4055 if (b->ptr - 2 >= b->buf) {
4078 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4080 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4083 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4084 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4085 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4086 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4088 while (nl < b->end && *nl != 0xd)
4090 if (nl < b->end && *nl == 0xd) {
4092 if (nl + 1 < b->end) {
4099 * Not CR,LF but just CR
4107 * Blast - found CR as last char in buffer
4112 * They may not care, defer work as long as
4116 return (nl - b->ptr);
4120 b->ptr++; /* say we have read it as far as
4121 * flush() is concerned */
4122 b->buf++; /* Leave space in front of buffer */
4123 /* Note as we have moved buf up flush's
4125 will naturally make posn point at CR
4127 b->bufsiz--; /* Buffer is thus smaller */
4128 code = PerlIO_fill(f); /* Fetch some more */
4129 b->bufsiz++; /* Restore size for next time */
4130 b->buf--; /* Point at space */
4131 b->ptr = nl = b->buf; /* Which is what we hand
4133 *nl = 0xd; /* Fill in the CR */
4135 goto test; /* fill() call worked */
4137 * CR at EOF - just fall through
4139 /* Should we clear EOF though ??? */
4144 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4150 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4152 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4153 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4159 if (ptr == b->end && *c->nl == 0xd) {
4160 /* Defered CR at end of buffer case - we lied about count */
4172 * Test code - delete when it works ...
4174 IV flags = PerlIOBase(f)->flags;
4175 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4176 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4177 /* Defered CR at end of buffer case - we lied about count */
4183 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4184 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4192 * They have taken what we lied about
4200 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4204 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4206 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4207 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4209 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4210 const STDCHAR *buf = (const STDCHAR *) vbuf;
4211 const STDCHAR *ebuf = buf + count;
4214 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4216 while (buf < ebuf) {
4217 STDCHAR *eptr = b->buf + b->bufsiz;
4218 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4219 while (buf < ebuf && b->ptr < eptr) {
4221 if ((b->ptr + 2) > eptr) {
4229 *(b->ptr)++ = 0xd; /* CR */
4230 *(b->ptr)++ = 0xa; /* LF */
4232 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4242 if (b->ptr >= eptr) {
4248 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4250 return (buf - (STDCHAR *) vbuf);
4255 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4257 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4262 return PerlIOBuf_flush(aTHX_ f);
4266 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4268 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4269 /* In text mode - flush any pending stuff and flip it */
4270 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4271 #ifndef PERLIO_USING_CRLF
4272 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4273 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4274 PerlIO_pop(aTHX_ f);
4281 PerlIO_funcs PerlIO_crlf = {
4282 sizeof(PerlIO_funcs),
4285 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4287 PerlIOBuf_popped, /* popped */
4289 PerlIOCrlf_binmode, /* binmode */
4293 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4295 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4296 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4304 PerlIOBase_clearerr,
4305 PerlIOBase_setlinebuf,
4310 PerlIOCrlf_set_ptrcnt,
4314 /*--------------------------------------------------------------------------------------*/
4316 * mmap as "buffer" layer
4320 PerlIOBuf base; /* PerlIOBuf stuff */
4321 Mmap_t mptr; /* Mapped address */
4322 Size_t len; /* mapped length */
4323 STDCHAR *bbuf; /* malloced buffer if map fails */
4326 static size_t page_size = 0;
4329 PerlIOMmap_map(pTHX_ PerlIO *f)
4331 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4332 IV flags = PerlIOBase(f)->flags;
4336 if (flags & PERLIO_F_CANREAD) {
4337 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4338 int fd = PerlIO_fileno(f);
4340 code = Fstat(fd, &st);
4341 if (code == 0 && S_ISREG(st.st_mode)) {
4342 SSize_t len = st.st_size - b->posn;
4346 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4348 SETERRNO(0, SS_NORMAL);
4349 # ifdef _SC_PAGESIZE
4350 page_size = sysconf(_SC_PAGESIZE);
4352 page_size = sysconf(_SC_PAGE_SIZE);
4354 if ((long) page_size < 0) {
4359 (void) SvUPGRADE(error, SVt_PV);
4360 msg = SvPVx(error, n_a);
4361 Perl_croak(aTHX_ "panic: sysconf: %s",
4366 "panic: sysconf: pagesize unknown");
4370 # ifdef HAS_GETPAGESIZE
4371 page_size = getpagesize();
4373 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4374 page_size = PAGESIZE; /* compiletime, bad */
4378 if ((IV) page_size <= 0)
4379 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4384 * This is a hack - should never happen - open should
4387 b->posn = PerlIO_tell(PerlIONext(f));
4389 posn = (b->posn / page_size) * page_size;
4390 len = st.st_size - posn;
4391 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4392 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4393 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4394 madvise(m->mptr, len, MADV_SEQUENTIAL);
4396 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4397 madvise(m->mptr, len, MADV_WILLNEED);
4399 PerlIOBase(f)->flags =
4400 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4401 b->end = ((STDCHAR *) m->mptr) + len;
4402 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4411 PerlIOBase(f)->flags =
4412 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4414 b->ptr = b->end = b->ptr;
4423 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4425 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4426 PerlIOBuf *b = &m->base;
4430 code = munmap(m->mptr, m->len);
4434 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4437 b->ptr = b->end = b->buf;
4438 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4444 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4446 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4447 PerlIOBuf *b = &m->base;
4448 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4450 * Already have a readbuffer in progress
4456 * We have a write buffer or flushed PerlIOBuf read buffer
4458 m->bbuf = b->buf; /* save it in case we need it again */
4459 b->buf = NULL; /* Clear to trigger below */
4462 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4465 * Map did not work - recover PerlIOBuf buffer if we have one
4470 b->ptr = b->end = b->buf;
4473 return PerlIOBuf_get_base(aTHX_ f);
4477 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4479 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4480 PerlIOBuf *b = &m->base;
4481 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4483 if (b->ptr && (b->ptr - count) >= b->buf
4484 && memEQ(b->ptr - count, vbuf, count)) {
4486 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4491 * Loose the unwritable mapped buffer
4495 * If flush took the "buffer" see if we have one from before
4497 if (!b->buf && m->bbuf)
4500 PerlIOBuf_get_base(aTHX_ f);
4504 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4508 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4510 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4511 PerlIOBuf *b = &m->base;
4512 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4514 * No, or wrong sort of, buffer
4517 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4521 * If unmap took the "buffer" see if we have one from before
4523 if (!b->buf && m->bbuf)
4526 PerlIOBuf_get_base(aTHX_ f);
4530 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4534 PerlIOMmap_flush(pTHX_ PerlIO *f)
4536 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4537 PerlIOBuf *b = &m->base;
4538 IV code = PerlIOBuf_flush(aTHX_ f);
4540 * Now we are "synced" at PerlIOBuf level
4547 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4552 * We seem to have a PerlIOBuf buffer which was not mapped
4553 * remember it in case we need one later
4562 PerlIOMmap_fill(pTHX_ PerlIO *f)
4564 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4565 IV code = PerlIO_flush(f);
4566 if (code == 0 && !b->buf) {
4567 code = PerlIOMmap_map(aTHX_ f);
4569 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4570 code = PerlIOBuf_fill(aTHX_ f);
4576 PerlIOMmap_close(pTHX_ PerlIO *f)
4578 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4579 PerlIOBuf *b = &m->base;
4580 IV code = PerlIO_flush(f);
4584 b->ptr = b->end = b->buf;
4586 if (PerlIOBuf_close(aTHX_ f) != 0)
4592 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4594 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4598 PerlIO_funcs PerlIO_mmap = {
4599 sizeof(PerlIO_funcs),
4602 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4606 PerlIOBase_binmode, /* binmode */
4620 PerlIOBase_clearerr,
4621 PerlIOBase_setlinebuf,
4622 PerlIOMmap_get_base,
4626 PerlIOBuf_set_ptrcnt,
4629 #endif /* HAS_MMAP */
4632 Perl_PerlIO_stdin(pTHX)
4635 PerlIO_stdstreams(aTHX);
4637 return &PL_perlio[1];
4641 Perl_PerlIO_stdout(pTHX)
4644 PerlIO_stdstreams(aTHX);
4646 return &PL_perlio[2];
4650 Perl_PerlIO_stderr(pTHX)
4653 PerlIO_stdstreams(aTHX);
4655 return &PL_perlio[3];
4658 /*--------------------------------------------------------------------------------------*/
4661 PerlIO_getname(PerlIO *f, char *buf)
4666 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4668 name = fgetname(stdio, buf);
4670 Perl_croak(aTHX_ "Don't know how to get file name");
4676 /*--------------------------------------------------------------------------------------*/
4678 * Functions which can be called on any kind of PerlIO implemented in
4682 #undef PerlIO_fdopen
4684 PerlIO_fdopen(int fd, const char *mode)
4687 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4692 PerlIO_open(const char *path, const char *mode)
4695 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4696 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4699 #undef Perlio_reopen
4701 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4704 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4705 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4710 PerlIO_getc(PerlIO *f)
4714 SSize_t count = PerlIO_read(f, buf, 1);
4716 return (unsigned char) buf[0];
4721 #undef PerlIO_ungetc
4723 PerlIO_ungetc(PerlIO *f, int ch)
4728 if (PerlIO_unread(f, &buf, 1) == 1)
4736 PerlIO_putc(PerlIO *f, int ch)
4740 return PerlIO_write(f, &buf, 1);
4745 PerlIO_puts(PerlIO *f, const char *s)
4748 STRLEN len = strlen(s);
4749 return PerlIO_write(f, s, len);
4752 #undef PerlIO_rewind
4754 PerlIO_rewind(PerlIO *f)
4757 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4761 #undef PerlIO_vprintf
4763 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4766 SV *sv = newSVpvn("", 0);
4772 Perl_va_copy(ap, apc);
4773 sv_vcatpvf(sv, fmt, &apc);
4775 sv_vcatpvf(sv, fmt, &ap);
4778 wrote = PerlIO_write(f, s, len);
4783 #undef PerlIO_printf
4785 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4790 result = PerlIO_vprintf(f, fmt, ap);
4795 #undef PerlIO_stdoutf
4797 PerlIO_stdoutf(const char *fmt, ...)
4803 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4808 #undef PerlIO_tmpfile
4810 PerlIO_tmpfile(void)
4816 GV *gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4820 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
4821 newSVpvn("File::Temp", 10), Nullsv, Nullsv, Nullsv);
4822 gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4823 GvIMPORTED_CV_on(gv);
4827 if (gv && GvCV(gv)) {
4833 if (call_sv((SV*)GvCV(gv), G_SCALAR)) {
4834 GV *gv = (GV*)SvRV(newSVsv(*PL_stack_sp--));
4835 IO *io = gv ? GvIO(gv) : 0;
4836 fd = io ? PerlIO_fileno(IoIFP(io)) : -1;
4845 f = PerlIO_fdopen(fd, "w+");
4848 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4849 PerlLIO_unlink(SvPVX(sv));
4860 #endif /* USE_SFIO */
4861 #endif /* PERLIO_IS_STDIO */
4863 /*======================================================================================*/
4865 * Now some functions in terms of above which may be needed even if we are
4866 * not in true PerlIO mode
4870 #undef PerlIO_setpos
4872 PerlIO_setpos(PerlIO *f, SV *pos)
4877 Off_t *posn = (Off_t *) SvPV(pos, len);
4878 if (f && len == sizeof(Off_t))
4879 return PerlIO_seek(f, *posn, SEEK_SET);
4881 SETERRNO(EINVAL, SS_IVCHAN);
4885 #undef PerlIO_setpos
4887 PerlIO_setpos(PerlIO *f, SV *pos)
4892 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4893 if (f && len == sizeof(Fpos_t)) {
4894 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4895 return fsetpos64(f, fpos);
4897 return fsetpos(f, fpos);
4901 SETERRNO(EINVAL, SS_IVCHAN);
4907 #undef PerlIO_getpos
4909 PerlIO_getpos(PerlIO *f, SV *pos)
4912 Off_t posn = PerlIO_tell(f);
4913 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4914 return (posn == (Off_t) - 1) ? -1 : 0;
4917 #undef PerlIO_getpos
4919 PerlIO_getpos(PerlIO *f, SV *pos)
4924 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4925 code = fgetpos64(f, &fpos);
4927 code = fgetpos(f, &fpos);
4929 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4934 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4937 vprintf(char *pat, char *args)
4939 _doprnt(pat, args, stdout);
4940 return 0; /* wrong, but perl doesn't use the return
4945 vfprintf(FILE *fd, char *pat, char *args)
4947 _doprnt(pat, args, fd);
4948 return 0; /* wrong, but perl doesn't use the return
4954 #ifndef PerlIO_vsprintf
4956 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4958 int val = vsprintf(s, fmt, ap);
4960 if (strlen(s) >= (STRLEN) n) {
4962 (void) PerlIO_puts(Perl_error_log,
4963 "panic: sprintf overflow - memory corrupted!\n");
4971 #ifndef PerlIO_sprintf
4973 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4978 result = PerlIO_vsprintf(s, n, fmt, ap);