2 * perlio.c Copyright (c) 1996-2006, 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.
12 /* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
20 * at the dispatch tables, even when we do not need it for other reasons.
21 * Invent a dSYS macro to abstract this out
23 #ifdef PERL_IMPLICIT_SYS
36 #define PERLIO_NOT_STDIO 0
37 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
43 * This file provides those parts of PerlIO abstraction
44 * which are not #defined in perlio.h.
45 * Which these are depends on various Configure #ifdef's
49 #define PERL_IN_PERLIO_C
52 #ifdef PERL_IMPLICIT_CONTEXT
60 /* Missing proto on LynxOS */
64 /* Call the callback or PerlIOBase, and return failure. */
65 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
66 if (PerlIOValid(f)) { \
67 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
68 if (tab && tab->callback) \
69 return (*tab->callback) args; \
71 return PerlIOBase_ ## base args; \
74 SETERRNO(EBADF, SS_IVCHAN); \
77 /* Call the callback or fail, and return failure. */
78 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
79 if (PerlIOValid(f)) { \
80 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
81 if (tab && tab->callback) \
82 return (*tab->callback) args; \
83 SETERRNO(EINVAL, LIB_INVARG); \
86 SETERRNO(EBADF, SS_IVCHAN); \
89 /* Call the callback or PerlIOBase, and be void. */
90 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
91 if (PerlIOValid(f)) { \
92 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
93 if (tab && tab->callback) \
94 (*tab->callback) args; \
96 PerlIOBase_ ## base args; \
99 SETERRNO(EBADF, SS_IVCHAN)
101 /* Call the callback or fail, and be void. */
102 #define Perl_PerlIO_or_fail_void(f, callback, args) \
103 if (PerlIOValid(f)) { \
104 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
105 if (tab && tab->callback) \
106 (*tab->callback) args; \
108 SETERRNO(EINVAL, LIB_INVARG); \
111 SETERRNO(EBADF, SS_IVCHAN)
115 perlsio_binmode(FILE *fp, int iotype, int mode)
118 * This used to be contents of do_binmode in doio.c
121 # if defined(atarist) || defined(__MINT__)
124 ((FILE *) fp)->_flag |= _IOBIN;
126 ((FILE *) fp)->_flag &= ~_IOBIN;
133 if (PerlLIO_setmode(fp, mode) != -1) {
135 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
137 # if defined(WIN32) && defined(__BORLANDC__)
139 * The translation mode of the stream is maintained independent
141 * the translation mode of the fd in the Borland RTL (heavy
142 * digging through their runtime sources reveal). User has to
144 * the mode explicitly for the stream (though they don't
146 * this anywhere). GSAR 97-5-24
152 fp->flags &= ~_F_BIN;
160 # if defined(USEMYBINMODE)
162 if (my_binmode(fp, iotype, mode) != FALSE)
168 PERL_UNUSED_ARG(iotype);
169 PERL_UNUSED_ARG(mode);
177 #define O_ACCMODE 3 /* Assume traditional implementation */
181 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
183 const int result = rawmode & O_ACCMODE;
188 ptype = IoTYPE_RDONLY;
191 ptype = IoTYPE_WRONLY;
199 *writing = (result != O_RDONLY);
201 if (result == O_RDONLY) {
205 else if (rawmode & O_APPEND) {
207 if (result != O_WRONLY)
212 if (result == O_WRONLY)
219 if (rawmode & O_BINARY)
225 #ifndef PERLIO_LAYERS
227 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
229 if (!names || !*names
230 || strEQ(names, ":crlf")
231 || strEQ(names, ":raw")
232 || strEQ(names, ":bytes")
236 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
244 PerlIO_destruct(pTHX)
249 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
252 PERL_UNUSED_ARG(iotype);
253 PERL_UNUSED_ARG(mode);
254 PERL_UNUSED_ARG(names);
257 return perlsio_binmode(fp, iotype, mode);
262 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
264 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
267 #ifdef PERL_IMPLICIT_SYS
268 return PerlSIO_fdupopen(f);
271 return win32_fdupopen(f);
274 const int fd = PerlLIO_dup(PerlIO_fileno(f));
278 const int omode = djgpp_get_stream_mode(f);
280 const int omode = fcntl(fd, F_GETFL);
282 PerlIO_intmode2str(omode,mode,NULL);
283 /* the r+ is a hack */
284 return PerlIO_fdopen(fd, mode);
289 SETERRNO(EBADF, SS_IVCHAN);
299 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
303 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
304 int imode, int perm, PerlIO *old, int narg, SV **args)
308 Perl_croak(aTHX_ "More than one argument to open");
310 if (*args == &PL_sv_undef)
311 return PerlIO_tmpfile();
313 const char *name = SvPV_nolen_const(*args);
314 if (*mode == IoTYPE_NUMERIC) {
315 fd = PerlLIO_open3(name, imode, perm);
317 return PerlIO_fdopen(fd, mode + 1);
320 return PerlIO_reopen(name, mode, old);
323 return PerlIO_open(name, mode);
328 return PerlIO_fdopen(fd, (char *) mode);
333 XS(XS_PerlIO__Layer__find)
337 Perl_croak(aTHX_ "Usage class->find(name[,load])");
339 const char * const name = SvPV_nolen_const(ST(1));
340 ST(0) = (strEQ(name, "crlf")
341 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
348 Perl_boot_core_PerlIO(pTHX)
350 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
356 #ifdef PERLIO_IS_STDIO
363 * Does nothing (yet) except force this file to be included in perl
364 * binary. That allows this file to force inclusion of other functions
365 * that may be required by loadable extensions e.g. for
366 * FileHandle::tmpfile
370 #undef PerlIO_tmpfile
377 #else /* PERLIO_IS_STDIO */
385 * This section is just to make sure these functions get pulled in from
389 #undef PerlIO_tmpfile
401 * Force this file to be included in perl binary. Which allows this
402 * file to force inclusion of other functions that may be required by
403 * loadable extensions e.g. for FileHandle::tmpfile
407 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
408 * results in a lot of lseek()s to regular files and lot of small
411 sfset(sfstdout, SF_SHARE, 0);
414 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
416 PerlIO_importFILE(FILE *stdio, const char *mode)
418 const int fd = fileno(stdio);
419 if (!mode || !*mode) {
422 return PerlIO_fdopen(fd, mode);
426 PerlIO_findFILE(PerlIO *pio)
428 const int fd = PerlIO_fileno(pio);
429 FILE * const f = fdopen(fd, "r+");
431 if (!f && errno == EINVAL)
433 if (!f && errno == EINVAL)
440 /*======================================================================================*/
442 * Implement all the PerlIO interface ourselves.
448 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
455 #include <sys/mman.h>
459 PerlIO_debug(const char *fmt, ...)
464 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
465 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
467 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
469 PL_perlio_debug_fd = -1;
471 if (PL_perlio_debug_fd > 0) {
474 const char * const s = CopFILE(PL_curcop);
475 /* Use fixed buffer as sv_catpvf etc. needs SVs */
477 const STRLEN len = my_sprintf(buffer, "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
478 # ifdef USE_VSNPRINTF
479 const STRLEN len2 = vsnprintf(buffer+len, sizeof(buffer) - len, fmt, ap);
481 const STRLEN len2 = vsprintf(buffer+len, fmt, ap);
482 # endif /* USE_VSNPRINTF */
483 PerlLIO_write(PL_perlio_debug_fd, buffer, len + len2);
485 const char *s = CopFILE(PL_curcop);
487 SV * const sv = newSVpvs("");
488 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
489 (IV) CopLINE(PL_curcop));
490 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
492 s = SvPV_const(sv, len);
493 PerlLIO_write(PL_perlio_debug_fd, s, len);
500 /*--------------------------------------------------------------------------------------*/
503 * Inner level routines
507 * Table of pointers to the PerlIO structs (malloc'ed)
509 #define PERLIO_TABLE_SIZE 64
512 PerlIO_allocate(pTHX)
516 * Find a free slot in the table, allocating new table as necessary
521 while ((f = *last)) {
523 last = (PerlIO **) (f);
524 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
530 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
538 #undef PerlIO_fdupopen
540 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
542 if (PerlIOValid(f)) {
543 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
544 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
546 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
548 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
552 SETERRNO(EBADF, SS_IVCHAN);
558 PerlIO_cleantable(pTHX_ PerlIO **tablep)
560 PerlIO * const table = *tablep;
563 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
564 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
565 PerlIO * const f = table + i;
577 PerlIO_list_alloc(pTHX)
581 Newxz(list, 1, PerlIO_list_t);
587 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
590 if (--list->refcnt == 0) {
593 for (i = 0; i < list->cur; i++) {
594 if (list->array[i].arg)
595 SvREFCNT_dec(list->array[i].arg);
597 Safefree(list->array);
605 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
611 if (list->cur >= list->len) {
614 Renew(list->array, list->len, PerlIO_pair_t);
616 Newx(list->array, list->len, PerlIO_pair_t);
618 p = &(list->array[list->cur++]);
620 if ((p->arg = arg)) {
621 SvREFCNT_inc_simple_void_NN(arg);
626 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
628 PerlIO_list_t *list = NULL;
631 list = PerlIO_list_alloc(aTHX);
632 for (i=0; i < proto->cur; i++) {
634 if (proto->array[i].arg)
635 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
636 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
643 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
646 PerlIO **table = &proto->Iperlio;
649 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
650 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
651 PerlIO_allocate(aTHX); /* root slot is never used */
652 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
653 while ((f = *table)) {
655 table = (PerlIO **) (f++);
656 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
658 (void) fp_dup(f, 0, param);
664 PERL_UNUSED_ARG(proto);
665 PERL_UNUSED_ARG(param);
670 PerlIO_destruct(pTHX)
673 PerlIO **table = &PL_perlio;
676 PerlIO_debug("Destruct %p\n",aTHX);
678 while ((f = *table)) {
680 table = (PerlIO **) (f++);
681 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
685 if (l->tab->kind & PERLIO_K_DESTRUCT) {
686 PerlIO_debug("Destruct popping %s\n", l->tab->name);
700 PerlIO_pop(pTHX_ PerlIO *f)
702 const PerlIOl *l = *f;
704 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
705 if (l->tab->Popped) {
707 * If popped returns non-zero do not free its layer structure
708 * it has either done so itself, or it is shared and still in
711 if ((*l->tab->Popped) (aTHX_ f) != 0)
719 /* Return as an array the stack of layers on a filehandle. Note that
720 * the stack is returned top-first in the array, and there are three
721 * times as many array elements as there are layers in the stack: the
722 * first element of a layer triplet is the name, the second one is the
723 * arguments, and the third one is the flags. */
726 PerlIO_get_layers(pTHX_ PerlIO *f)
729 AV * const av = newAV();
731 if (PerlIOValid(f)) {
732 PerlIOl *l = PerlIOBase(f);
735 SV * const name = l->tab && l->tab->name ?
736 newSVpv(l->tab->name, 0) : &PL_sv_undef;
737 SV * const arg = l->tab && l->tab->Getarg ?
738 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
741 av_push(av, newSViv((IV)l->flags));
749 /*--------------------------------------------------------------------------------------*/
751 * XS Interface for perl code
755 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
759 if ((SSize_t) len <= 0)
761 for (i = 0; i < PL_known_layers->cur; i++) {
762 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
763 if (memEQ(f->name, name, len) && f->name[len] == 0) {
764 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
768 if (load && PL_subname && PL_def_layerlist
769 && PL_def_layerlist->cur >= 2) {
770 if (PL_in_load_module) {
771 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
774 SV * const pkgsv = newSVpvs("PerlIO");
775 SV * const layer = newSVpvn(name, len);
776 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
778 SAVEINT(PL_in_load_module);
780 SAVEGENERICSV(PL_warnhook);
781 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
785 * The two SVs are magically freed by load_module
787 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
790 return PerlIO_find_layer(aTHX_ name, len, 0);
793 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
797 #ifdef USE_ATTRIBUTES_FOR_PERLIO
800 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
803 IO * const io = GvIOn((GV *) SvRV(sv));
804 PerlIO * const ifp = IoIFP(io);
805 PerlIO * const ofp = IoOFP(io);
806 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
812 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
815 IO * const io = GvIOn((GV *) SvRV(sv));
816 PerlIO * const ifp = IoIFP(io);
817 PerlIO * const ofp = IoOFP(io);
818 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
824 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
826 Perl_warn(aTHX_ "clear %" SVf, sv);
831 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
833 Perl_warn(aTHX_ "free %" SVf, sv);
837 MGVTBL perlio_vtab = {
845 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
848 SV * const sv = SvRV(ST(1));
849 AV * const av = newAV();
853 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
855 mg = mg_find(sv, PERL_MAGIC_ext);
856 mg->mg_virtual = &perlio_vtab;
858 Perl_warn(aTHX_ "attrib %" SVf, sv);
859 for (i = 2; i < items; i++) {
861 const char * const name = SvPV_const(ST(i), len);
862 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
864 av_push(av, SvREFCNT_inc_simple_NN(layer));
875 #endif /* USE_ATTIBUTES_FOR_PERLIO */
878 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
880 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
881 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
885 XS(XS_PerlIO__Layer__NoWarnings)
887 /* This is used as a %SIG{__WARN__} handler to supress warnings
888 during loading of layers.
893 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
897 XS(XS_PerlIO__Layer__find)
902 Perl_croak(aTHX_ "Usage class->find(name[,load])");
905 const char * const name = SvPV_const(ST(1), len);
906 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
907 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
909 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
916 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
919 if (!PL_known_layers)
920 PL_known_layers = PerlIO_list_alloc(aTHX);
921 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
922 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
926 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
930 const char *s = names;
932 while (isSPACE(*s) || *s == ':')
937 const char *as = NULL;
939 if (!isIDFIRST(*s)) {
941 * Message is consistent with how attribute lists are
942 * passed. Even though this means "foo : : bar" is
943 * seen as an invalid separator character.
945 const char q = ((*s == '\'') ? '"' : '\'');
946 if (ckWARN(WARN_LAYER))
947 Perl_warner(aTHX_ packWARN(WARN_LAYER),
948 "Invalid separator character %c%c%c in PerlIO layer specification %s",
950 SETERRNO(EINVAL, LIB_INVARG);
955 } while (isALNUM(*e));
971 * It's a nul terminated string, not allowed
972 * to \ the terminating null. Anything other
973 * character is passed over.
983 if (ckWARN(WARN_LAYER))
984 Perl_warner(aTHX_ packWARN(WARN_LAYER),
985 "Argument list not closed for PerlIO layer \"%.*s\"",
997 PerlIO_funcs * const layer =
998 PerlIO_find_layer(aTHX_ s, llen, 1);
1000 PerlIO_list_push(aTHX_ av, layer,
1006 if (ckWARN(WARN_LAYER))
1007 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1020 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1023 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1024 #ifdef PERLIO_USING_CRLF
1027 if (PerlIO_stdio.Set_ptrcnt)
1028 tab = &PerlIO_stdio;
1030 PerlIO_debug("Pushing %s\n", tab->name);
1031 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1036 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1038 return av->array[n].arg;
1042 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1044 if (n >= 0 && n < av->cur) {
1045 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1046 av->array[n].funcs->name);
1047 return av->array[n].funcs;
1050 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1055 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1057 PERL_UNUSED_ARG(mode);
1058 PERL_UNUSED_ARG(arg);
1059 PERL_UNUSED_ARG(tab);
1060 if (PerlIOValid(f)) {
1062 PerlIO_pop(aTHX_ f);
1068 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1069 sizeof(PerlIO_funcs),
1072 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1092 NULL, /* get_base */
1093 NULL, /* get_bufsiz */
1096 NULL, /* set_ptrcnt */
1100 PerlIO_default_layers(pTHX)
1103 if (!PL_def_layerlist) {
1104 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1105 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1106 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1107 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1109 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1111 osLayer = &PerlIO_win32;
1114 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1116 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1117 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1119 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1121 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1122 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1124 PerlIO_list_push(aTHX_ PL_def_layerlist,
1125 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1128 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1131 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1134 if (PL_def_layerlist->cur < 2) {
1135 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1137 return PL_def_layerlist;
1141 Perl_boot_core_PerlIO(pTHX)
1143 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1144 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1147 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1148 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1152 PerlIO_default_layer(pTHX_ I32 n)
1155 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1158 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1161 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1162 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1165 PerlIO_stdstreams(pTHX)
1169 PerlIO_allocate(aTHX);
1170 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1171 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1172 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1177 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1179 if (tab->fsize != sizeof(PerlIO_funcs)) {
1181 Perl_croak(aTHX_ "Layer does not match this perl");
1185 if (tab->size < sizeof(PerlIOl)) {
1188 /* Real layer with a data area */
1191 Newxz(temp, tab->size, char);
1195 l->tab = (PerlIO_funcs*) tab;
1197 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1198 (void*)f, tab->name,
1199 (mode) ? mode : "(Null)", (void*)arg);
1200 if (*l->tab->Pushed &&
1202 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1203 PerlIO_pop(aTHX_ f);
1212 /* Pseudo-layer where push does its own stack adjust */
1213 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1214 (mode) ? mode : "(Null)", (void*)arg);
1216 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1224 PerlIOBase_binmode(pTHX_ PerlIO *f)
1226 if (PerlIOValid(f)) {
1227 /* Is layer suitable for raw stream ? */
1228 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1229 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1230 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1233 /* Not suitable - pop it */
1234 PerlIO_pop(aTHX_ f);
1242 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1244 PERL_UNUSED_ARG(mode);
1245 PERL_UNUSED_ARG(arg);
1246 PERL_UNUSED_ARG(tab);
1248 if (PerlIOValid(f)) {
1253 * Strip all layers that are not suitable for a raw stream
1256 while (t && (l = *t)) {
1257 if (l->tab->Binmode) {
1258 /* Has a handler - normal case */
1259 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1261 /* Layer still there - move down a layer */
1270 /* No handler - pop it */
1271 PerlIO_pop(aTHX_ t);
1274 if (PerlIOValid(f)) {
1275 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1283 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1284 PerlIO_list_t *layers, IV n, IV max)
1288 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1290 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1301 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1305 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1306 code = PerlIO_parse_layers(aTHX_ layers, names);
1308 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1310 PerlIO_list_free(aTHX_ layers);
1316 /*--------------------------------------------------------------------------------------*/
1318 * Given the abstraction above the public API functions
1322 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1324 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1325 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1326 iotype, mode, (names) ? names : "(Null)");
1329 /* Do not flush etc. if (e.g.) switching encodings.
1330 if a pushed layer knows it needs to flush lower layers
1331 (for example :unix which is never going to call them)
1332 it can do the flush when it is pushed.
1334 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1337 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1338 #ifdef PERLIO_USING_CRLF
1339 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1340 O_BINARY so we can look for it in mode.
1342 if (!(mode & O_BINARY)) {
1344 /* FIXME?: Looking down the layer stack seems wrong,
1345 but is a way of reaching past (say) an encoding layer
1346 to flip CRLF-ness of the layer(s) below
1349 /* Perhaps we should turn on bottom-most aware layer
1350 e.g. Ilya's idea that UNIX TTY could serve
1352 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1353 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1354 /* Not in text mode - flush any pending stuff and flip it */
1356 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1358 /* Only need to turn it on in one layer so we are done */
1363 /* Not finding a CRLF aware layer presumably means we are binary
1364 which is not what was requested - so we failed
1365 We _could_ push :crlf layer but so could caller
1370 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1371 So code that used to be here is now in PerlIORaw_pushed().
1373 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1378 PerlIO__close(pTHX_ PerlIO *f)
1380 if (PerlIOValid(f)) {
1381 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1382 if (tab && tab->Close)
1383 return (*tab->Close)(aTHX_ f);
1385 return PerlIOBase_close(aTHX_ f);
1388 SETERRNO(EBADF, SS_IVCHAN);
1394 Perl_PerlIO_close(pTHX_ PerlIO *f)
1396 const int code = PerlIO__close(aTHX_ f);
1397 while (PerlIOValid(f)) {
1398 PerlIO_pop(aTHX_ f);
1404 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1407 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1411 PerlIO_context_layers(pTHX_ const char *mode)
1414 const char *type = NULL;
1416 * Need to supply default layer info from open.pm
1419 SV * const layers = PL_curcop->cop_io;
1422 type = SvPV_const(layers, len);
1423 if (type && mode[0] != 'r') {
1425 * Skip to write part
1427 const char * const s = strchr(type, 0);
1428 if (s && (STRLEN)(s - type) < len) {
1437 static PerlIO_funcs *
1438 PerlIO_layer_from_ref(pTHX_ SV *sv)
1442 * For any scalar type load the handler which is bundled with perl
1444 if (SvTYPE(sv) < SVt_PVAV)
1445 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1448 * For other types allow if layer is known but don't try and load it
1450 switch (SvTYPE(sv)) {
1452 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1454 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1456 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1458 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1464 PerlIO_resolve_layers(pTHX_ const char *layers,
1465 const char *mode, int narg, SV **args)
1468 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1471 PerlIO_stdstreams(aTHX);
1473 SV * const arg = *args;
1475 * If it is a reference but not an object see if we have a handler
1478 if (SvROK(arg) && !sv_isobject(arg)) {
1479 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1481 def = PerlIO_list_alloc(aTHX);
1482 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1486 * Don't fail if handler cannot be found :via(...) etc. may do
1487 * something sensible else we will just stringfy and open
1492 if (!layers || !*layers)
1493 layers = PerlIO_context_layers(aTHX_ mode);
1494 if (layers && *layers) {
1498 av = PerlIO_list_alloc(aTHX);
1499 for (i = 0; i < def->cur; i++) {
1500 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1507 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1511 PerlIO_list_free(aTHX_ av);
1523 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1524 int imode, int perm, PerlIO *f, int narg, SV **args)
1527 if (!f && narg == 1 && *args == &PL_sv_undef) {
1528 if ((f = PerlIO_tmpfile())) {
1529 if (!layers || !*layers)
1530 layers = PerlIO_context_layers(aTHX_ mode);
1531 if (layers && *layers)
1532 PerlIO_apply_layers(aTHX_ f, mode, layers);
1536 PerlIO_list_t *layera;
1538 PerlIO_funcs *tab = NULL;
1539 if (PerlIOValid(f)) {
1541 * This is "reopen" - it is not tested as perl does not use it
1545 layera = PerlIO_list_alloc(aTHX);
1547 SV * const arg = (l->tab->Getarg)
1548 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1550 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1551 l = *PerlIONext(&l);
1555 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1561 * Start at "top" of layer stack
1563 n = layera->cur - 1;
1565 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1574 * Found that layer 'n' can do opens - call it
1576 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1577 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1579 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1580 tab->name, layers ? layers : "(Null)", mode, fd,
1581 imode, perm, (void*)f, narg, (void*)args);
1583 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1586 SETERRNO(EINVAL, LIB_INVARG);
1590 if (n + 1 < layera->cur) {
1592 * More layers above the one that we used to open -
1595 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1596 /* If pushing layers fails close the file */
1603 PerlIO_list_free(aTHX_ layera);
1610 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1612 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1616 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1618 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1622 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1624 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1628 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1630 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1634 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1636 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1640 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1645 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1647 if (tab && tab->Flush)
1648 return (*tab->Flush) (aTHX_ f);
1650 return 0; /* If no Flush defined, silently succeed. */
1653 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1654 SETERRNO(EBADF, SS_IVCHAN);
1660 * Is it good API design to do flush-all on NULL, a potentially
1661 * errorneous input? Maybe some magical value (PerlIO*
1662 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1663 * things on fflush(NULL), but should we be bound by their design
1666 PerlIO **table = &PL_perlio;
1668 while ((f = *table)) {
1670 table = (PerlIO **) (f++);
1671 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1672 if (*f && PerlIO_flush(f) != 0)
1682 PerlIOBase_flush_linebuf(pTHX)
1685 PerlIO **table = &PL_perlio;
1687 while ((f = *table)) {
1689 table = (PerlIO **) (f++);
1690 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1693 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1694 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1702 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1704 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1708 PerlIO_isutf8(PerlIO *f)
1711 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1713 SETERRNO(EBADF, SS_IVCHAN);
1719 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1721 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1725 Perl_PerlIO_error(pTHX_ PerlIO *f)
1727 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1731 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1733 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1737 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1739 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1743 PerlIO_has_base(PerlIO *f)
1745 if (PerlIOValid(f)) {
1746 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1749 return (tab->Get_base != NULL);
1750 SETERRNO(EINVAL, LIB_INVARG);
1753 SETERRNO(EBADF, SS_IVCHAN);
1759 PerlIO_fast_gets(PerlIO *f)
1761 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1762 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1765 return (tab->Set_ptrcnt != NULL);
1766 SETERRNO(EINVAL, LIB_INVARG);
1769 SETERRNO(EBADF, SS_IVCHAN);
1775 PerlIO_has_cntptr(PerlIO *f)
1777 if (PerlIOValid(f)) {
1778 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1781 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1782 SETERRNO(EINVAL, LIB_INVARG);
1785 SETERRNO(EBADF, SS_IVCHAN);
1791 PerlIO_canset_cnt(PerlIO *f)
1793 if (PerlIOValid(f)) {
1794 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1797 return (tab->Set_ptrcnt != NULL);
1798 SETERRNO(EINVAL, LIB_INVARG);
1801 SETERRNO(EBADF, SS_IVCHAN);
1807 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1809 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1813 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1815 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1819 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1821 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1825 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1827 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1831 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1833 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1837 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1839 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1843 /*--------------------------------------------------------------------------------------*/
1845 * utf8 and raw dummy layers
1849 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1851 PERL_UNUSED_CONTEXT;
1852 PERL_UNUSED_ARG(mode);
1853 PERL_UNUSED_ARG(arg);
1854 if (PerlIOValid(f)) {
1855 if (tab->kind & PERLIO_K_UTF8)
1856 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1858 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1864 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1865 sizeof(PerlIO_funcs),
1868 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1888 NULL, /* get_base */
1889 NULL, /* get_bufsiz */
1892 NULL, /* set_ptrcnt */
1895 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1896 sizeof(PerlIO_funcs),
1919 NULL, /* get_base */
1920 NULL, /* get_bufsiz */
1923 NULL, /* set_ptrcnt */
1927 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1928 IV n, const char *mode, int fd, int imode, int perm,
1929 PerlIO *old, int narg, SV **args)
1931 PerlIO_funcs * const tab = PerlIO_default_btm();
1932 PERL_UNUSED_ARG(self);
1933 if (tab && tab->Open)
1934 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1936 SETERRNO(EINVAL, LIB_INVARG);
1940 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1941 sizeof(PerlIO_funcs),
1964 NULL, /* get_base */
1965 NULL, /* get_bufsiz */
1968 NULL, /* set_ptrcnt */
1970 /*--------------------------------------------------------------------------------------*/
1971 /*--------------------------------------------------------------------------------------*/
1973 * "Methods" of the "base class"
1977 PerlIOBase_fileno(pTHX_ PerlIO *f)
1979 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1983 PerlIO_modestr(PerlIO * f, char *buf)
1986 if (PerlIOValid(f)) {
1987 const IV flags = PerlIOBase(f)->flags;
1988 if (flags & PERLIO_F_APPEND) {
1990 if (flags & PERLIO_F_CANREAD) {
1994 else if (flags & PERLIO_F_CANREAD) {
1996 if (flags & PERLIO_F_CANWRITE)
1999 else if (flags & PERLIO_F_CANWRITE) {
2001 if (flags & PERLIO_F_CANREAD) {
2005 #ifdef PERLIO_USING_CRLF
2006 if (!(flags & PERLIO_F_CRLF))
2016 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2018 PerlIOl * const l = PerlIOBase(f);
2019 PERL_UNUSED_CONTEXT;
2020 PERL_UNUSED_ARG(arg);
2022 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2023 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2024 if (tab->Set_ptrcnt != NULL)
2025 l->flags |= PERLIO_F_FASTGETS;
2027 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2031 l->flags |= PERLIO_F_CANREAD;
2034 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2037 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2040 SETERRNO(EINVAL, LIB_INVARG);
2046 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2049 l->flags &= ~PERLIO_F_CRLF;
2052 l->flags |= PERLIO_F_CRLF;
2055 SETERRNO(EINVAL, LIB_INVARG);
2062 l->flags |= l->next->flags &
2063 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2068 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2069 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2070 l->flags, PerlIO_modestr(f, temp));
2076 PerlIOBase_popped(pTHX_ PerlIO *f)
2078 PERL_UNUSED_CONTEXT;
2084 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2087 * Save the position as current head considers it
2089 const Off_t old = PerlIO_tell(f);
2090 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2091 PerlIOSelf(f, PerlIOBuf)->posn = old;
2092 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2096 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2098 STDCHAR *buf = (STDCHAR *) vbuf;
2100 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2101 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2102 SETERRNO(EBADF, SS_IVCHAN);
2108 SSize_t avail = PerlIO_get_cnt(f);
2111 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2113 STDCHAR *ptr = PerlIO_get_ptr(f);
2114 Copy(ptr, buf, take, STDCHAR);
2115 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2118 if (avail == 0) /* set_ptrcnt could have reset avail */
2121 if (count > 0 && avail <= 0) {
2122 if (PerlIO_fill(f) != 0)
2127 return (buf - (STDCHAR *) vbuf);
2133 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2135 PERL_UNUSED_CONTEXT;
2141 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2143 PERL_UNUSED_CONTEXT;
2149 PerlIOBase_close(pTHX_ PerlIO *f)
2152 if (PerlIOValid(f)) {
2153 PerlIO *n = PerlIONext(f);
2154 code = PerlIO_flush(f);
2155 PerlIOBase(f)->flags &=
2156 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2157 while (PerlIOValid(n)) {
2158 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2159 if (tab && tab->Close) {
2160 if ((*tab->Close)(aTHX_ n) != 0)
2165 PerlIOBase(n)->flags &=
2166 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2172 SETERRNO(EBADF, SS_IVCHAN);
2178 PerlIOBase_eof(pTHX_ PerlIO *f)
2180 PERL_UNUSED_CONTEXT;
2181 if (PerlIOValid(f)) {
2182 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2188 PerlIOBase_error(pTHX_ PerlIO *f)
2190 PERL_UNUSED_CONTEXT;
2191 if (PerlIOValid(f)) {
2192 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2198 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2200 if (PerlIOValid(f)) {
2201 PerlIO * const n = PerlIONext(f);
2202 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2209 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2211 PERL_UNUSED_CONTEXT;
2212 if (PerlIOValid(f)) {
2213 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2218 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2224 return sv_dup(arg, param);
2227 return newSVsv(arg);
2230 PERL_UNUSED_ARG(param);
2231 return newSVsv(arg);
2236 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2238 PerlIO * const nexto = PerlIONext(o);
2239 if (PerlIOValid(nexto)) {
2240 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2241 if (tab && tab->Dup)
2242 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2244 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2247 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2250 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2251 self->name, (void*)f, (void*)o, (void*)param);
2253 arg = (*self->Getarg)(aTHX_ o, param, flags);
2257 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2266 perl_mutex PerlIO_mutex;
2269 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2271 /* Must be called with PerlIO_mutex locked. */
2273 S_more_refcounted_fds(pTHX_ const int new_fd) {
2274 const int old_max = PL_perlio_fd_refcnt_size;
2275 const int new_max = 16 + (new_fd & ~15);
2278 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2279 old_max, new_fd, new_max);
2281 if (new_fd < old_max) {
2285 assert (new_max > new_fd);
2288 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2292 MUTEX_UNLOCK(&PerlIO_mutex);
2294 /* Can't use PerlIO to write as it allocates memory */
2295 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2296 PL_no_mem, strlen(PL_no_mem));
2300 PL_perlio_fd_refcnt_size = new_max;
2301 PL_perlio_fd_refcnt = new_array;
2303 PerlIO_debug("Zeroing %p, %d\n", new_array + old_max, new_max - old_max);
2305 Zero(new_array + old_max, new_max - old_max, int);
2312 /* Place holder for stdstreams call ??? */
2314 MUTEX_INIT(&PerlIO_mutex);
2316 PERL_UNUSED_CONTEXT;
2321 PerlIOUnix_refcnt_inc(int fd)
2328 MUTEX_LOCK(&PerlIO_mutex);
2330 if (fd >= PL_perlio_fd_refcnt_size)
2331 S_more_refcounted_fds(aTHX_ fd);
2333 PL_perlio_fd_refcnt[fd]++;
2334 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2337 MUTEX_UNLOCK(&PerlIO_mutex);
2343 PerlIOUnix_refcnt_dec(int fd)
2350 MUTEX_LOCK(&PerlIO_mutex);
2352 /* XXX should this be a panic? */
2353 if (fd >= PL_perlio_fd_refcnt_size)
2354 S_more_refcounted_fds(aTHX_ fd);
2356 /* XXX should this be a panic if it drops below 0? */
2357 cnt = --PL_perlio_fd_refcnt[fd];
2358 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2360 MUTEX_UNLOCK(&PerlIO_mutex);
2367 PerlIO_cleanup(pTHX)
2372 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2374 PerlIO_debug("Cleanup layers\n");
2376 /* Raise STDIN..STDERR refcount so we don't close them */
2377 for (i=0; i < 3; i++)
2378 PerlIOUnix_refcnt_inc(i);
2379 PerlIO_cleantable(aTHX_ &PL_perlio);
2380 /* Restore STDIN..STDERR refcount */
2381 for (i=0; i < 3; i++)
2382 PerlIOUnix_refcnt_dec(i);
2384 if (PL_known_layers) {
2385 PerlIO_list_free(aTHX_ PL_known_layers);
2386 PL_known_layers = NULL;
2388 if (PL_def_layerlist) {
2389 PerlIO_list_free(aTHX_ PL_def_layerlist);
2390 PL_def_layerlist = NULL;
2396 /*--------------------------------------------------------------------------------------*/
2398 * Bottom-most level for UNIX-like case
2402 struct _PerlIO base; /* The generic part */
2403 int fd; /* UNIX like file descriptor */
2404 int oflags; /* open/fcntl flags */
2408 PerlIOUnix_oflags(const char *mode)
2411 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2416 if (*++mode == '+') {
2423 oflags = O_CREAT | O_TRUNC;
2424 if (*++mode == '+') {
2433 oflags = O_CREAT | O_APPEND;
2434 if (*++mode == '+') {
2447 else if (*mode == 't') {
2449 oflags &= ~O_BINARY;
2453 * Always open in binary mode
2456 if (*mode || oflags == -1) {
2457 SETERRNO(EINVAL, LIB_INVARG);
2464 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2466 PERL_UNUSED_CONTEXT;
2467 return PerlIOSelf(f, PerlIOUnix)->fd;
2471 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2473 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2476 if (PerlLIO_fstat(fd, &st) == 0) {
2477 if (!S_ISREG(st.st_mode)) {
2478 PerlIO_debug("%d is not regular file\n",fd);
2479 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2482 PerlIO_debug("%d _is_ a regular file\n",fd);
2488 PerlIOUnix_refcnt_inc(fd);
2489 PERL_UNUSED_CONTEXT;
2493 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2495 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2496 if (*PerlIONext(f)) {
2497 /* We never call down so do any pending stuff now */
2498 PerlIO_flush(PerlIONext(f));
2500 * XXX could (or should) we retrieve the oflags from the open file
2501 * handle rather than believing the "mode" we are passed in? XXX
2502 * Should the value on NULL mode be 0 or -1?
2504 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2505 mode ? PerlIOUnix_oflags(mode) : -1);
2507 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2513 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2515 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2517 PERL_UNUSED_CONTEXT;
2518 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2520 SETERRNO(ESPIPE, LIB_INVARG);
2522 SETERRNO(EINVAL, LIB_INVARG);
2526 new_loc = PerlLIO_lseek(fd, offset, whence);
2527 if (new_loc == (Off_t) - 1)
2529 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2534 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2535 IV n, const char *mode, int fd, int imode,
2536 int perm, PerlIO *f, int narg, SV **args)
2538 if (PerlIOValid(f)) {
2539 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2540 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2543 if (*mode == IoTYPE_NUMERIC)
2546 imode = PerlIOUnix_oflags(mode);
2550 const char *path = SvPV_nolen_const(*args);
2551 fd = PerlLIO_open3(path, imode, perm);
2555 if (*mode == IoTYPE_IMPLICIT)
2558 f = PerlIO_allocate(aTHX);
2560 if (!PerlIOValid(f)) {
2561 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2565 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2566 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2567 if (*mode == IoTYPE_APPEND)
2568 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2575 * FIXME: pop layers ???
2583 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2585 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2587 if (flags & PERLIO_DUP_FD) {
2588 fd = PerlLIO_dup(fd);
2591 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2593 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2594 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2603 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2606 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2607 #ifdef PERLIO_STD_SPECIAL
2609 return PERLIO_STD_IN(fd, vbuf, count);
2611 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2612 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2616 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2617 if (len >= 0 || errno != EINTR) {
2619 if (errno != EAGAIN) {
2620 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2623 else if (len == 0 && count != 0) {
2624 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2635 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2638 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2639 #ifdef PERLIO_STD_SPECIAL
2640 if (fd == 1 || fd == 2)
2641 return PERLIO_STD_OUT(fd, vbuf, count);
2644 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2645 if (len >= 0 || errno != EINTR) {
2647 if (errno != EAGAIN) {
2648 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2659 PerlIOUnix_tell(pTHX_ PerlIO *f)
2661 PERL_UNUSED_CONTEXT;
2663 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2668 PerlIOUnix_close(pTHX_ PerlIO *f)
2671 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2673 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2674 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2675 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2680 SETERRNO(EBADF,SS_IVCHAN);
2683 while (PerlLIO_close(fd) != 0) {
2684 if (errno != EINTR) {
2691 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2696 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2697 sizeof(PerlIO_funcs),
2704 PerlIOBase_binmode, /* binmode */
2714 PerlIOBase_noop_ok, /* flush */
2715 PerlIOBase_noop_fail, /* fill */
2718 PerlIOBase_clearerr,
2719 PerlIOBase_setlinebuf,
2720 NULL, /* get_base */
2721 NULL, /* get_bufsiz */
2724 NULL, /* set_ptrcnt */
2727 /*--------------------------------------------------------------------------------------*/
2732 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2733 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2734 broken by the last second glibc 2.3 fix
2736 #define STDIO_BUFFER_WRITABLE
2741 struct _PerlIO base;
2742 FILE *stdio; /* The stream */
2746 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2748 PERL_UNUSED_CONTEXT;
2750 if (PerlIOValid(f)) {
2751 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2753 return PerlSIO_fileno(s);
2760 PerlIOStdio_mode(const char *mode, char *tmode)
2762 char * const ret = tmode;
2768 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2776 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2779 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2780 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2781 if (toptab == tab) {
2782 /* Top is already stdio - pop self (duplicate) and use original */
2783 PerlIO_pop(aTHX_ f);
2786 const int fd = PerlIO_fileno(n);
2789 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2790 mode = PerlIOStdio_mode(mode, tmode)))) {
2791 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2792 /* We never call down so do any pending stuff now */
2793 PerlIO_flush(PerlIONext(f));
2800 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2805 PerlIO_importFILE(FILE *stdio, const char *mode)
2811 if (!mode || !*mode) {
2812 /* We need to probe to see how we can open the stream
2813 so start with read/write and then try write and read
2814 we dup() so that we can fclose without loosing the fd.
2816 Note that the errno value set by a failing fdopen
2817 varies between stdio implementations.
2819 const int fd = PerlLIO_dup(fileno(stdio));
2820 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2822 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2825 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2828 /* Don't seem to be able to open */
2834 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2835 s = PerlIOSelf(f, PerlIOStdio);
2843 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2844 IV n, const char *mode, int fd, int imode,
2845 int perm, PerlIO *f, int narg, SV **args)
2848 if (PerlIOValid(f)) {
2849 const char * const path = SvPV_nolen_const(*args);
2850 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2852 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2853 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2858 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2863 const char * const path = SvPV_nolen_const(*args);
2864 if (*mode == IoTYPE_NUMERIC) {
2866 fd = PerlLIO_open3(path, imode, perm);
2870 bool appended = FALSE;
2872 /* Cygwin wants its 'b' early. */
2874 mode = PerlIOStdio_mode(mode, tmode);
2876 stdio = PerlSIO_fopen(path, mode);
2879 f = PerlIO_allocate(aTHX);
2882 mode = PerlIOStdio_mode(mode, tmode);
2883 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2885 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2886 PerlIOUnix_refcnt_inc(fileno(stdio));
2888 PerlSIO_fclose(stdio);
2900 if (*mode == IoTYPE_IMPLICIT) {
2907 stdio = PerlSIO_stdin;
2910 stdio = PerlSIO_stdout;
2913 stdio = PerlSIO_stderr;
2918 stdio = PerlSIO_fdopen(fd, mode =
2919 PerlIOStdio_mode(mode, tmode));
2923 f = PerlIO_allocate(aTHX);
2925 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2926 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2927 PerlIOUnix_refcnt_inc(fileno(stdio));
2937 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2939 /* This assumes no layers underneath - which is what
2940 happens, but is not how I remember it. NI-S 2001/10/16
2942 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2943 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2944 const int fd = fileno(stdio);
2946 if (flags & PERLIO_DUP_FD) {
2947 const int dfd = PerlLIO_dup(fileno(stdio));
2949 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2954 /* FIXME: To avoid messy error recovery if dup fails
2955 re-use the existing stdio as though flag was not set
2959 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2961 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2962 PerlIOUnix_refcnt_inc(fileno(stdio));
2968 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2970 PERL_UNUSED_CONTEXT;
2972 /* XXX this could use PerlIO_canset_fileno() and
2973 * PerlIO_set_fileno() support from Configure
2975 # if defined(__UCLIBC__)
2976 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2979 # elif defined(__GLIBC__)
2980 /* There may be a better way for GLIBC:
2981 - libio.h defines a flag to not close() on cleanup
2985 # elif defined(__sun__)
2987 # elif defined(__hpux)
2991 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2992 your platform does not have special entry try this one.
2993 [For OSF only have confirmation for Tru64 (alpha)
2994 but assume other OSFs will be similar.]
2996 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2999 # elif defined(__FreeBSD__)
3000 /* There may be a better way on FreeBSD:
3001 - we could insert a dummy func in the _close function entry
3002 f->_close = (int (*)(void *)) dummy_close;
3006 # elif defined(__OpenBSD__)
3007 /* There may be a better way on OpenBSD:
3008 - we could insert a dummy func in the _close function entry
3009 f->_close = (int (*)(void *)) dummy_close;
3013 # elif defined(__EMX__)
3014 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3017 # elif defined(__CYGWIN__)
3018 /* There may be a better way on CYGWIN:
3019 - we could insert a dummy func in the _close function entry
3020 f->_close = (int (*)(void *)) dummy_close;
3024 # elif defined(WIN32)
3025 # if defined(__BORLANDC__)
3026 f->fd = PerlLIO_dup(fileno(f));
3027 # elif defined(UNDER_CE)
3028 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3037 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3038 (which isn't thread safe) instead
3040 # error "Don't know how to set FILE.fileno on your platform"
3048 PerlIOStdio_close(pTHX_ PerlIO *f)
3050 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3056 const int fd = fileno(stdio);
3061 #ifdef SOCKS5_VERSION_NAME
3062 /* Socks lib overrides close() but stdio isn't linked to
3063 that library (though we are) - so we must call close()
3064 on sockets on stdio's behalf.
3067 Sock_size_t optlen = sizeof(int);
3068 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3071 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3074 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3075 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3077 if (stdio == stdout || stdio == stderr)
3078 return PerlIO_flush(f);
3079 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3080 Use Sarathy's trick from maint-5.6 to invalidate the
3081 fileno slot of the FILE *
3083 result = PerlIO_flush(f);
3085 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3087 dupfd = PerlLIO_dup(fd);
3089 result = PerlSIO_fclose(stdio);
3090 /* We treat error from stdio as success if we invalidated
3091 errno may NOT be expected EBADF
3093 if (invalidate && result != 0) {
3097 #ifdef SOCKS5_VERSION_NAME
3098 /* in SOCKS' case, let close() determine return value */
3102 PerlLIO_dup2(dupfd,fd);
3103 PerlLIO_close(dupfd);
3110 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3113 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3117 STDCHAR *buf = (STDCHAR *) vbuf;
3119 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3120 * stdio does not do that for fread()
3122 const int ch = PerlSIO_fgetc(s);
3129 got = PerlSIO_fread(vbuf, 1, count, s);
3130 if (got == 0 && PerlSIO_ferror(s))
3132 if (got >= 0 || errno != EINTR)
3135 SETERRNO(0,0); /* just in case */
3141 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3144 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3146 #ifdef STDIO_BUFFER_WRITABLE
3147 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3148 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3149 STDCHAR *base = PerlIO_get_base(f);
3150 SSize_t cnt = PerlIO_get_cnt(f);
3151 STDCHAR *ptr = PerlIO_get_ptr(f);
3152 SSize_t avail = ptr - base;
3154 if (avail > count) {
3158 Move(buf-avail,ptr,avail,STDCHAR);
3161 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3162 if (PerlSIO_feof(s) && unread >= 0)
3163 PerlSIO_clearerr(s);
3168 if (PerlIO_has_cntptr(f)) {
3169 /* We can get pointer to buffer but not its base
3170 Do ungetc() but check chars are ending up in the
3173 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3174 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3176 const int ch = *--buf & 0xFF;
3177 if (ungetc(ch,s) != ch) {
3178 /* ungetc did not work */
3181 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3182 /* Did not change pointer as expected */
3183 fgetc(s); /* get char back again */
3193 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3199 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3204 got = PerlSIO_fwrite(vbuf, 1, count,
3205 PerlIOSelf(f, PerlIOStdio)->stdio);
3206 if (got >= 0 || errno != EINTR)
3209 SETERRNO(0,0); /* just in case */
3215 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3217 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3218 PERL_UNUSED_CONTEXT;
3220 return PerlSIO_fseek(stdio, offset, whence);
3224 PerlIOStdio_tell(pTHX_ PerlIO *f)
3226 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3227 PERL_UNUSED_CONTEXT;
3229 return PerlSIO_ftell(stdio);
3233 PerlIOStdio_flush(pTHX_ PerlIO *f)
3235 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3236 PERL_UNUSED_CONTEXT;
3238 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3239 return PerlSIO_fflush(stdio);
3245 * FIXME: This discards ungetc() and pre-read stuff which is not
3246 * right if this is just a "sync" from a layer above Suspect right
3247 * design is to do _this_ but not have layer above flush this
3248 * layer read-to-read
3251 * Not writeable - sync by attempting a seek
3253 const int err = errno;
3254 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3262 PerlIOStdio_eof(pTHX_ PerlIO *f)
3264 PERL_UNUSED_CONTEXT;
3266 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3270 PerlIOStdio_error(pTHX_ PerlIO *f)
3272 PERL_UNUSED_CONTEXT;
3274 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3278 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3280 PERL_UNUSED_CONTEXT;
3282 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3286 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3288 PERL_UNUSED_CONTEXT;
3290 #ifdef HAS_SETLINEBUF
3291 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3293 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3299 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3301 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3302 return (STDCHAR*)PerlSIO_get_base(stdio);
3306 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3308 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3309 return PerlSIO_get_bufsiz(stdio);
3313 #ifdef USE_STDIO_PTR
3315 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3317 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3318 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3322 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3324 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3325 return PerlSIO_get_cnt(stdio);
3329 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3331 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3333 #ifdef STDIO_PTR_LVALUE
3334 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3335 #ifdef STDIO_PTR_LVAL_SETS_CNT
3336 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3337 assert(PerlSIO_get_cnt(stdio) == (cnt));
3340 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3342 * Setting ptr _does_ change cnt - we are done
3346 #else /* STDIO_PTR_LVALUE */
3348 #endif /* STDIO_PTR_LVALUE */
3351 * Now (or only) set cnt
3353 #ifdef STDIO_CNT_LVALUE
3354 PerlSIO_set_cnt(stdio, cnt);
3355 #else /* STDIO_CNT_LVALUE */
3356 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3357 PerlSIO_set_ptr(stdio,
3358 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3360 #else /* STDIO_PTR_LVAL_SETS_CNT */
3362 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3363 #endif /* STDIO_CNT_LVALUE */
3370 PerlIOStdio_fill(pTHX_ PerlIO *f)
3372 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3374 PERL_UNUSED_CONTEXT;
3377 * fflush()ing read-only streams can cause trouble on some stdio-s
3379 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3380 if (PerlSIO_fflush(stdio) != 0)
3383 c = PerlSIO_fgetc(stdio);
3387 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3389 #ifdef STDIO_BUFFER_WRITABLE
3390 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3391 /* Fake ungetc() to the real buffer in case system's ungetc
3394 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3395 SSize_t cnt = PerlSIO_get_cnt(stdio);
3396 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3397 if (ptr == base+1) {
3398 *--ptr = (STDCHAR) c;
3399 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3400 if (PerlSIO_feof(stdio))
3401 PerlSIO_clearerr(stdio);
3407 if (PerlIO_has_cntptr(f)) {
3409 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3416 /* An ungetc()d char is handled separately from the regular
3417 * buffer, so we stuff it in the buffer ourselves.
3418 * Should never get called as should hit code above
3420 *(--((*stdio)->_ptr)) = (unsigned char) c;
3423 /* If buffer snoop scheme above fails fall back to
3426 if (PerlSIO_ungetc(c, stdio) != c)
3434 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3435 sizeof(PerlIO_funcs),
3437 sizeof(PerlIOStdio),
3438 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3442 PerlIOBase_binmode, /* binmode */
3456 PerlIOStdio_clearerr,
3457 PerlIOStdio_setlinebuf,
3459 PerlIOStdio_get_base,
3460 PerlIOStdio_get_bufsiz,
3465 #ifdef USE_STDIO_PTR
3466 PerlIOStdio_get_ptr,
3467 PerlIOStdio_get_cnt,
3468 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3469 PerlIOStdio_set_ptrcnt,
3472 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3477 #endif /* USE_STDIO_PTR */
3480 /* Note that calls to PerlIO_exportFILE() are reversed using
3481 * PerlIO_releaseFILE(), not importFILE. */
3483 PerlIO_exportFILE(PerlIO * f, const char *mode)
3487 if (PerlIOValid(f)) {
3490 if (!mode || !*mode) {
3491 mode = PerlIO_modestr(f, buf);
3493 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3497 /* De-link any lower layers so new :stdio sticks */
3499 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3500 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3502 /* Link previous lower layers under new one */
3506 /* restore layers list */
3516 PerlIO_findFILE(PerlIO *f)
3520 if (l->tab == &PerlIO_stdio) {
3521 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3524 l = *PerlIONext(&l);
3526 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3527 return PerlIO_exportFILE(f, NULL);
3530 /* Use this to reverse PerlIO_exportFILE calls. */
3532 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3537 if (l->tab == &PerlIO_stdio) {
3538 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3539 if (s->stdio == f) {
3541 PerlIO_pop(aTHX_ p);
3550 /*--------------------------------------------------------------------------------------*/
3552 * perlio buffer layer
3556 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3558 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3559 const int fd = PerlIO_fileno(f);
3560 if (fd >= 0 && PerlLIO_isatty(fd)) {
3561 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3563 if (*PerlIONext(f)) {
3564 const Off_t posn = PerlIO_tell(PerlIONext(f));
3565 if (posn != (Off_t) - 1) {
3569 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3573 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3574 IV n, const char *mode, int fd, int imode, int perm,
3575 PerlIO *f, int narg, SV **args)
3577 if (PerlIOValid(f)) {
3578 PerlIO *next = PerlIONext(f);
3580 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3581 if (tab && tab->Open)
3583 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3585 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3590 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3592 if (*mode == IoTYPE_IMPLICIT) {
3598 if (tab && tab->Open)
3599 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3602 SETERRNO(EINVAL, LIB_INVARG);
3604 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3606 * if push fails during open, open fails. close will pop us.
3611 fd = PerlIO_fileno(f);
3612 if (init && fd == 2) {
3614 * Initial stderr is unbuffered
3616 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3618 #ifdef PERLIO_USING_CRLF
3619 # ifdef PERLIO_IS_BINMODE_FD
3620 if (PERLIO_IS_BINMODE_FD(fd))
3621 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3625 * do something about failing setmode()? --jhi
3627 PerlLIO_setmode(fd, O_BINARY);
3636 * This "flush" is akin to sfio's sync in that it handles files in either
3637 * read or write state. For write state, we put the postponed data through
3638 * the next layers. For read state, we seek() the next layers to the
3639 * offset given by current position in the buffer, and discard the buffer
3640 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3641 * in any case?). Then the pass the stick further in chain.
3644 PerlIOBuf_flush(pTHX_ PerlIO *f)
3646 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3648 PerlIO *n = PerlIONext(f);
3649 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3651 * write() the buffer
3653 const STDCHAR *buf = b->buf;
3654 const STDCHAR *p = buf;
3655 while (p < b->ptr) {
3656 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3660 else if (count < 0 || PerlIO_error(n)) {
3661 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3666 b->posn += (p - buf);
3668 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3669 STDCHAR *buf = PerlIO_get_base(f);
3671 * Note position change
3673 b->posn += (b->ptr - buf);
3674 if (b->ptr < b->end) {
3675 /* We did not consume all of it - try and seek downstream to
3676 our logical position
3678 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3679 /* Reload n as some layers may pop themselves on seek */
3680 b->posn = PerlIO_tell(n = PerlIONext(f));
3683 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3684 data is lost for good - so return saying "ok" having undone
3687 b->posn -= (b->ptr - buf);
3692 b->ptr = b->end = b->buf;
3693 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3694 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3695 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3700 /* This discards the content of the buffer after b->ptr, and rereads
3701 * the buffer from the position off in the layer downstream; here off
3702 * is at offset corresponding to b->ptr - b->buf.
3705 PerlIOBuf_fill(pTHX_ PerlIO *f)
3707 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3708 PerlIO *n = PerlIONext(f);
3711 * Down-stream flush is defined not to loose read data so is harmless.
3712 * we would not normally be fill'ing if there was data left in anycase.
3714 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3716 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3717 PerlIOBase_flush_linebuf(aTHX);
3720 PerlIO_get_base(f); /* allocate via vtable */
3722 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3724 b->ptr = b->end = b->buf;
3726 if (!PerlIOValid(n)) {
3727 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3731 if (PerlIO_fast_gets(n)) {
3733 * Layer below is also buffered. We do _NOT_ want to call its
3734 * ->Read() because that will loop till it gets what we asked for
3735 * which may hang on a pipe etc. Instead take anything it has to
3736 * hand, or ask it to fill _once_.
3738 avail = PerlIO_get_cnt(n);
3740 avail = PerlIO_fill(n);
3742 avail = PerlIO_get_cnt(n);
3744 if (!PerlIO_error(n) && PerlIO_eof(n))
3749 STDCHAR *ptr = PerlIO_get_ptr(n);
3750 const SSize_t cnt = avail;
3751 if (avail > (SSize_t)b->bufsiz)
3753 Copy(ptr, b->buf, avail, STDCHAR);
3754 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3758 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3762 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3764 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3767 b->end = b->buf + avail;
3768 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3773 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3775 if (PerlIOValid(f)) {
3776 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3779 return PerlIOBase_read(aTHX_ f, vbuf, count);
3785 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3787 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3788 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3791 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3796 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3798 * Buffer is already a read buffer, we can overwrite any chars
3799 * which have been read back to buffer start
3801 avail = (b->ptr - b->buf);
3805 * Buffer is idle, set it up so whole buffer is available for
3809 b->end = b->buf + avail;
3811 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3813 * Buffer extends _back_ from where we are now
3815 b->posn -= b->bufsiz;
3817 if (avail > (SSize_t) count) {
3819 * If we have space for more than count, just move count
3827 * In simple stdio-like ungetc() case chars will be already
3830 if (buf != b->ptr) {
3831 Copy(buf, b->ptr, avail, STDCHAR);
3835 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3839 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3845 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3847 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3848 const STDCHAR *buf = (const STDCHAR *) vbuf;
3849 const STDCHAR *flushptr = buf;
3853 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3855 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3856 if (PerlIO_flush(f) != 0) {
3860 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3861 flushptr = buf + count;
3862 while (flushptr > buf && *(flushptr - 1) != '\n')
3866 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3867 if ((SSize_t) count < avail)
3869 if (flushptr > buf && flushptr <= buf + avail)
3870 avail = flushptr - buf;
3871 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3873 Copy(buf, b->ptr, avail, STDCHAR);
3878 if (buf == flushptr)
3881 if (b->ptr >= (b->buf + b->bufsiz))
3884 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3890 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3893 if ((code = PerlIO_flush(f)) == 0) {
3894 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3895 code = PerlIO_seek(PerlIONext(f), offset, whence);
3897 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3898 b->posn = PerlIO_tell(PerlIONext(f));
3905 PerlIOBuf_tell(pTHX_ PerlIO *f)
3907 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3909 * b->posn is file position where b->buf was read, or will be written
3911 Off_t posn = b->posn;
3912 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3913 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3915 /* As O_APPEND files are normally shared in some sense it is better
3920 /* when file is NOT shared then this is sufficient */
3921 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3923 posn = b->posn = PerlIO_tell(PerlIONext(f));
3927 * If buffer is valid adjust position by amount in buffer
3929 posn += (b->ptr - b->buf);
3935 PerlIOBuf_popped(pTHX_ PerlIO *f)
3937 const IV code = PerlIOBase_popped(aTHX_ f);
3938 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3939 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3942 b->ptr = b->end = b->buf = NULL;
3943 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3948 PerlIOBuf_close(pTHX_ PerlIO *f)
3950 const IV code = PerlIOBase_close(aTHX_ f);
3951 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3952 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3955 b->ptr = b->end = b->buf = NULL;
3956 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3961 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3963 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3970 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3972 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3975 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3976 return (b->end - b->ptr);
3981 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3983 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3984 PERL_UNUSED_CONTEXT;
3989 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3991 b->buf = (STDCHAR *) & b->oneword;
3992 b->bufsiz = sizeof(b->oneword);
3994 b->end = b->ptr = b->buf;
4000 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4002 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4005 return (b->end - b->buf);
4009 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4011 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4015 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4016 assert(PerlIO_get_cnt(f) == cnt);
4017 assert(b->ptr >= b->buf);
4019 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4023 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4025 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4030 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4031 sizeof(PerlIO_funcs),
4034 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4038 PerlIOBase_binmode, /* binmode */
4052 PerlIOBase_clearerr,
4053 PerlIOBase_setlinebuf,
4058 PerlIOBuf_set_ptrcnt,
4061 /*--------------------------------------------------------------------------------------*/
4063 * Temp layer to hold unread chars when cannot do it any other way
4067 PerlIOPending_fill(pTHX_ PerlIO *f)
4070 * Should never happen
4077 PerlIOPending_close(pTHX_ PerlIO *f)
4080 * A tad tricky - flush pops us, then we close new top
4083 return PerlIO_close(f);
4087 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4090 * A tad tricky - flush pops us, then we seek new top
4093 return PerlIO_seek(f, offset, whence);
4098 PerlIOPending_flush(pTHX_ PerlIO *f)
4100 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4101 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4105 PerlIO_pop(aTHX_ f);
4110 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4116 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4121 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4123 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4124 PerlIOl * const l = PerlIOBase(f);
4126 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4127 * etc. get muddled when it changes mid-string when we auto-pop.
4129 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4130 (PerlIOBase(PerlIONext(f))->
4131 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4136 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4138 SSize_t avail = PerlIO_get_cnt(f);
4140 if ((SSize_t)count < avail)
4143 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4144 if (got >= 0 && got < (SSize_t)count) {
4145 const SSize_t more =
4146 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4147 if (more >= 0 || got == 0)
4153 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4154 sizeof(PerlIO_funcs),
4157 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4158 PerlIOPending_pushed,
4161 PerlIOBase_binmode, /* binmode */
4170 PerlIOPending_close,
4171 PerlIOPending_flush,
4175 PerlIOBase_clearerr,
4176 PerlIOBase_setlinebuf,
4181 PerlIOPending_set_ptrcnt,
4186 /*--------------------------------------------------------------------------------------*/
4188 * crlf - translation On read translate CR,LF to "\n" we do this by
4189 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4190 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4192 * c->nl points on the first byte of CR LF pair when it is temporarily
4193 * replaced by LF, or to the last CR of the buffer. In the former case
4194 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4195 * that it ends at c->nl; these two cases can be distinguished by
4196 * *c->nl. c->nl is set during _getcnt() call, and unset during
4197 * _unread() and _flush() calls.
4198 * It only matters for read operations.
4202 PerlIOBuf base; /* PerlIOBuf stuff */
4203 STDCHAR *nl; /* Position of crlf we "lied" about in the
4208 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4211 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4212 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4214 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4215 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4216 PerlIOBase(f)->flags);
4219 /* Enable the first CRLF capable layer you can find, but if none
4220 * found, the one we just pushed is fine. This results in at
4221 * any given moment at most one CRLF-capable layer being enabled
4222 * in the whole layer stack. */
4223 PerlIO *g = PerlIONext(f);
4225 PerlIOl *b = PerlIOBase(g);
4226 if (b && b->tab == &PerlIO_crlf) {
4227 if (!(b->flags & PERLIO_F_CRLF))
4228 b->flags |= PERLIO_F_CRLF;
4229 PerlIO_pop(aTHX_ f);
4240 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4242 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4243 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4247 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4248 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4250 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4251 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4253 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4258 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4259 b->end = b->ptr = b->buf + b->bufsiz;
4260 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4261 b->posn -= b->bufsiz;
4263 while (count > 0 && b->ptr > b->buf) {
4264 const int ch = *--buf;
4266 if (b->ptr - 2 >= b->buf) {
4273 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4274 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4290 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4292 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4294 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4297 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4298 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4299 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4300 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4302 while (nl < b->end && *nl != 0xd)
4304 if (nl < b->end && *nl == 0xd) {
4306 if (nl + 1 < b->end) {
4313 * Not CR,LF but just CR
4321 * Blast - found CR as last char in buffer
4326 * They may not care, defer work as long as
4330 return (nl - b->ptr);
4334 b->ptr++; /* say we have read it as far as
4335 * flush() is concerned */
4336 b->buf++; /* Leave space in front of buffer */
4337 /* Note as we have moved buf up flush's
4339 will naturally make posn point at CR
4341 b->bufsiz--; /* Buffer is thus smaller */
4342 code = PerlIO_fill(f); /* Fetch some more */
4343 b->bufsiz++; /* Restore size for next time */
4344 b->buf--; /* Point at space */
4345 b->ptr = nl = b->buf; /* Which is what we hand
4347 *nl = 0xd; /* Fill in the CR */
4349 goto test; /* fill() call worked */
4351 * CR at EOF - just fall through
4353 /* Should we clear EOF though ??? */
4358 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4364 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4366 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4367 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4373 if (ptr == b->end && *c->nl == 0xd) {
4374 /* Defered CR at end of buffer case - we lied about count */
4387 * Test code - delete when it works ...
4389 IV flags = PerlIOBase(f)->flags;
4390 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4391 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4392 /* Defered CR at end of buffer case - we lied about count */
4398 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4399 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4407 * They have taken what we lied about
4415 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4419 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4421 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4422 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4424 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4425 const STDCHAR *buf = (const STDCHAR *) vbuf;
4426 const STDCHAR * const ebuf = buf + count;
4429 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4431 while (buf < ebuf) {
4432 const STDCHAR * const eptr = b->buf + b->bufsiz;
4433 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4434 while (buf < ebuf && b->ptr < eptr) {
4436 if ((b->ptr + 2) > eptr) {
4444 *(b->ptr)++ = 0xd; /* CR */
4445 *(b->ptr)++ = 0xa; /* LF */
4447 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4454 *(b->ptr)++ = *buf++;
4456 if (b->ptr >= eptr) {
4462 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4464 return (buf - (STDCHAR *) vbuf);
4469 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4471 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4476 return PerlIOBuf_flush(aTHX_ f);
4480 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4482 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4483 /* In text mode - flush any pending stuff and flip it */
4484 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4485 #ifndef PERLIO_USING_CRLF
4486 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4487 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4488 PerlIO_pop(aTHX_ f);
4495 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4496 sizeof(PerlIO_funcs),
4499 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4501 PerlIOBuf_popped, /* popped */
4503 PerlIOCrlf_binmode, /* binmode */
4507 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4508 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4509 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4517 PerlIOBase_clearerr,
4518 PerlIOBase_setlinebuf,
4523 PerlIOCrlf_set_ptrcnt,
4527 /*--------------------------------------------------------------------------------------*/
4529 * mmap as "buffer" layer
4533 PerlIOBuf base; /* PerlIOBuf stuff */
4534 Mmap_t mptr; /* Mapped address */
4535 Size_t len; /* mapped length */
4536 STDCHAR *bbuf; /* malloced buffer if map fails */
4540 PerlIOMmap_map(pTHX_ PerlIO *f)
4543 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4544 const IV flags = PerlIOBase(f)->flags;
4548 if (flags & PERLIO_F_CANREAD) {
4549 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4550 const int fd = PerlIO_fileno(f);
4552 code = Fstat(fd, &st);
4553 if (code == 0 && S_ISREG(st.st_mode)) {
4554 SSize_t len = st.st_size - b->posn;
4557 if (PL_mmap_page_size <= 0)
4558 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4562 * This is a hack - should never happen - open should
4565 b->posn = PerlIO_tell(PerlIONext(f));
4567 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4568 len = st.st_size - posn;
4569 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4570 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4571 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4572 madvise(m->mptr, len, MADV_SEQUENTIAL);
4574 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4575 madvise(m->mptr, len, MADV_WILLNEED);
4577 PerlIOBase(f)->flags =
4578 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4579 b->end = ((STDCHAR *) m->mptr) + len;
4580 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4589 PerlIOBase(f)->flags =
4590 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4592 b->ptr = b->end = b->ptr;
4601 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4603 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4606 PerlIOBuf * const b = &m->base;
4608 code = munmap(m->mptr, m->len);
4612 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4615 b->ptr = b->end = b->buf;
4616 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4622 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4624 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4625 PerlIOBuf * const b = &m->base;
4626 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4628 * Already have a readbuffer in progress
4634 * We have a write buffer or flushed PerlIOBuf read buffer
4636 m->bbuf = b->buf; /* save it in case we need it again */
4637 b->buf = NULL; /* Clear to trigger below */
4640 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4643 * Map did not work - recover PerlIOBuf buffer if we have one
4648 b->ptr = b->end = b->buf;
4651 return PerlIOBuf_get_base(aTHX_ f);
4655 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4657 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4658 PerlIOBuf * const b = &m->base;
4659 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4661 if (b->ptr && (b->ptr - count) >= b->buf
4662 && memEQ(b->ptr - count, vbuf, count)) {
4664 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4669 * Loose the unwritable mapped buffer
4673 * If flush took the "buffer" see if we have one from before
4675 if (!b->buf && m->bbuf)
4678 PerlIOBuf_get_base(aTHX_ f);
4682 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4686 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4688 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4689 PerlIOBuf * const b = &m->base;
4691 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4693 * No, or wrong sort of, buffer
4696 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4700 * If unmap took the "buffer" see if we have one from before
4702 if (!b->buf && m->bbuf)
4705 PerlIOBuf_get_base(aTHX_ f);
4709 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4713 PerlIOMmap_flush(pTHX_ PerlIO *f)
4715 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4716 PerlIOBuf * const b = &m->base;
4717 IV code = PerlIOBuf_flush(aTHX_ f);
4719 * Now we are "synced" at PerlIOBuf level
4726 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4731 * We seem to have a PerlIOBuf buffer which was not mapped
4732 * remember it in case we need one later
4741 PerlIOMmap_fill(pTHX_ PerlIO *f)
4743 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4744 IV code = PerlIO_flush(f);
4745 if (code == 0 && !b->buf) {
4746 code = PerlIOMmap_map(aTHX_ f);
4748 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4749 code = PerlIOBuf_fill(aTHX_ f);
4755 PerlIOMmap_close(pTHX_ PerlIO *f)
4757 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4758 PerlIOBuf * const b = &m->base;
4759 IV code = PerlIO_flush(f);
4763 b->ptr = b->end = b->buf;
4765 if (PerlIOBuf_close(aTHX_ f) != 0)
4771 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4773 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4777 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4778 sizeof(PerlIO_funcs),
4781 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4785 PerlIOBase_binmode, /* binmode */
4799 PerlIOBase_clearerr,
4800 PerlIOBase_setlinebuf,
4801 PerlIOMmap_get_base,
4805 PerlIOBuf_set_ptrcnt,
4808 #endif /* HAS_MMAP */
4811 Perl_PerlIO_stdin(pTHX)
4815 PerlIO_stdstreams(aTHX);
4817 return &PL_perlio[1];
4821 Perl_PerlIO_stdout(pTHX)
4825 PerlIO_stdstreams(aTHX);
4827 return &PL_perlio[2];
4831 Perl_PerlIO_stderr(pTHX)
4835 PerlIO_stdstreams(aTHX);
4837 return &PL_perlio[3];
4840 /*--------------------------------------------------------------------------------------*/
4843 PerlIO_getname(PerlIO *f, char *buf)
4848 bool exported = FALSE;
4849 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4851 stdio = PerlIO_exportFILE(f,0);
4855 name = fgetname(stdio, buf);
4856 if (exported) PerlIO_releaseFILE(f,stdio);
4861 PERL_UNUSED_ARG(buf);
4862 Perl_croak(aTHX_ "Don't know how to get file name");
4868 /*--------------------------------------------------------------------------------------*/
4870 * Functions which can be called on any kind of PerlIO implemented in
4874 #undef PerlIO_fdopen
4876 PerlIO_fdopen(int fd, const char *mode)
4879 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4884 PerlIO_open(const char *path, const char *mode)
4887 SV *name = sv_2mortal(newSVpv(path, 0));
4888 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4891 #undef Perlio_reopen
4893 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4896 SV *name = sv_2mortal(newSVpv(path,0));
4897 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4902 PerlIO_getc(PerlIO *f)
4906 if ( 1 == PerlIO_read(f, buf, 1) ) {
4907 return (unsigned char) buf[0];
4912 #undef PerlIO_ungetc
4914 PerlIO_ungetc(PerlIO *f, int ch)
4919 if (PerlIO_unread(f, &buf, 1) == 1)
4927 PerlIO_putc(PerlIO *f, int ch)
4931 return PerlIO_write(f, &buf, 1);
4936 PerlIO_puts(PerlIO *f, const char *s)
4939 return PerlIO_write(f, s, strlen(s));
4942 #undef PerlIO_rewind
4944 PerlIO_rewind(PerlIO *f)
4947 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4951 #undef PerlIO_vprintf
4953 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4956 SV * const sv = newSVpvs("");
4962 Perl_va_copy(ap, apc);
4963 sv_vcatpvf(sv, fmt, &apc);
4965 sv_vcatpvf(sv, fmt, &ap);
4967 s = SvPV_const(sv, len);
4968 wrote = PerlIO_write(f, s, len);
4973 #undef PerlIO_printf
4975 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4980 result = PerlIO_vprintf(f, fmt, ap);
4985 #undef PerlIO_stdoutf
4987 PerlIO_stdoutf(const char *fmt, ...)
4993 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4998 #undef PerlIO_tmpfile
5000 PerlIO_tmpfile(void)
5005 const int fd = win32_tmpfd();
5007 f = PerlIO_fdopen(fd, "w+b");
5009 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5010 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5012 * I have no idea how portable mkstemp() is ... NI-S
5014 const int fd = mkstemp(SvPVX(sv));
5016 f = PerlIO_fdopen(fd, "w+");
5018 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5019 PerlLIO_unlink(SvPVX_const(sv));
5022 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5023 FILE * const stdio = PerlSIO_tmpfile();
5026 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5027 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5029 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5035 # endif /* else HAS_MKSTEMP */
5036 #endif /* else WIN32 */
5043 #endif /* USE_SFIO */
5044 #endif /* PERLIO_IS_STDIO */
5046 /*======================================================================================*/
5048 * Now some functions in terms of above which may be needed even if we are
5049 * not in true PerlIO mode
5053 #undef PerlIO_setpos
5055 PerlIO_setpos(PerlIO *f, SV *pos)
5060 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5061 if (f && len == sizeof(Off_t))
5062 return PerlIO_seek(f, *posn, SEEK_SET);
5064 SETERRNO(EINVAL, SS_IVCHAN);
5068 #undef PerlIO_setpos
5070 PerlIO_setpos(PerlIO *f, SV *pos)
5075 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5076 if (f && len == sizeof(Fpos_t)) {
5077 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5078 return fsetpos64(f, fpos);
5080 return fsetpos(f, fpos);
5084 SETERRNO(EINVAL, SS_IVCHAN);
5090 #undef PerlIO_getpos
5092 PerlIO_getpos(PerlIO *f, SV *pos)
5095 Off_t posn = PerlIO_tell(f);
5096 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5097 return (posn == (Off_t) - 1) ? -1 : 0;
5100 #undef PerlIO_getpos
5102 PerlIO_getpos(PerlIO *f, SV *pos)
5107 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5108 code = fgetpos64(f, &fpos);
5110 code = fgetpos(f, &fpos);
5112 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5117 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5120 vprintf(char *pat, char *args)
5122 _doprnt(pat, args, stdout);
5123 return 0; /* wrong, but perl doesn't use the return
5128 vfprintf(FILE *fd, char *pat, char *args)
5130 _doprnt(pat, args, fd);
5131 return 0; /* wrong, but perl doesn't use the return
5137 #ifndef PerlIO_vsprintf
5139 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5142 #ifdef USE_VSNPRINTF
5143 const int val = vsnprintf(s, n, fmt, ap);
5145 const int val = vsprintf(s, fmt, ap);
5146 #endif /* #ifdef USE_VSNPRINTF */
5148 if (strlen(s) >= (STRLEN) n) {
5150 (void) PerlIO_puts(Perl_error_log,
5151 "panic: sprintf overflow - memory corrupted!\n");
5159 #ifndef PerlIO_sprintf
5161 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5166 result = PerlIO_vsprintf(s, n, fmt, ap);
5174 * c-indentation-style: bsd
5176 * indent-tabs-mode: t
5179 * ex: set ts=8 sts=4 sw=4 noet: