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 const STRLEN len2 = vsprintf(buffer+len, fmt, ap);
479 PerlLIO_write(PL_perlio_debug_fd, buffer, len + len2);
481 const char *s = CopFILE(PL_curcop);
483 SV * const sv = newSVpvs("");
484 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
485 (IV) CopLINE(PL_curcop));
486 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
488 s = SvPV_const(sv, len);
489 PerlLIO_write(PL_perlio_debug_fd, s, len);
496 /*--------------------------------------------------------------------------------------*/
499 * Inner level routines
503 * Table of pointers to the PerlIO structs (malloc'ed)
505 #define PERLIO_TABLE_SIZE 64
508 PerlIO_allocate(pTHX)
512 * Find a free slot in the table, allocating new table as necessary
517 while ((f = *last)) {
519 last = (PerlIO **) (f);
520 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
526 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
534 #undef PerlIO_fdupopen
536 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
538 if (PerlIOValid(f)) {
539 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
540 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
542 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
544 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
548 SETERRNO(EBADF, SS_IVCHAN);
554 PerlIO_cleantable(pTHX_ PerlIO **tablep)
556 PerlIO * const table = *tablep;
559 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
560 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
561 PerlIO * const f = table + i;
573 PerlIO_list_alloc(pTHX)
577 Newxz(list, 1, PerlIO_list_t);
583 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
586 if (--list->refcnt == 0) {
589 for (i = 0; i < list->cur; i++) {
590 if (list->array[i].arg)
591 SvREFCNT_dec(list->array[i].arg);
593 Safefree(list->array);
601 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
607 if (list->cur >= list->len) {
610 Renew(list->array, list->len, PerlIO_pair_t);
612 Newx(list->array, list->len, PerlIO_pair_t);
614 p = &(list->array[list->cur++]);
616 if ((p->arg = arg)) {
617 SvREFCNT_inc_simple_void_NN(arg);
622 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
624 PerlIO_list_t *list = NULL;
627 list = PerlIO_list_alloc(aTHX);
628 for (i=0; i < proto->cur; i++) {
630 if (proto->array[i].arg)
631 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
632 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
639 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
642 PerlIO **table = &proto->Iperlio;
645 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
646 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
647 PerlIO_allocate(aTHX); /* root slot is never used */
648 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
649 while ((f = *table)) {
651 table = (PerlIO **) (f++);
652 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
654 (void) fp_dup(f, 0, param);
660 PERL_UNUSED_ARG(proto);
661 PERL_UNUSED_ARG(param);
666 PerlIO_destruct(pTHX)
669 PerlIO **table = &PL_perlio;
672 PerlIO_debug("Destruct %p\n",aTHX);
674 while ((f = *table)) {
676 table = (PerlIO **) (f++);
677 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
681 if (l->tab->kind & PERLIO_K_DESTRUCT) {
682 PerlIO_debug("Destruct popping %s\n", l->tab->name);
696 PerlIO_pop(pTHX_ PerlIO *f)
698 const PerlIOl *l = *f;
700 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
701 if (l->tab->Popped) {
703 * If popped returns non-zero do not free its layer structure
704 * it has either done so itself, or it is shared and still in
707 if ((*l->tab->Popped) (aTHX_ f) != 0)
715 /* Return as an array the stack of layers on a filehandle. Note that
716 * the stack is returned top-first in the array, and there are three
717 * times as many array elements as there are layers in the stack: the
718 * first element of a layer triplet is the name, the second one is the
719 * arguments, and the third one is the flags. */
722 PerlIO_get_layers(pTHX_ PerlIO *f)
725 AV * const av = newAV();
727 if (PerlIOValid(f)) {
728 PerlIOl *l = PerlIOBase(f);
731 SV * const name = l->tab && l->tab->name ?
732 newSVpv(l->tab->name, 0) : &PL_sv_undef;
733 SV * const arg = l->tab && l->tab->Getarg ?
734 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
737 av_push(av, newSViv((IV)l->flags));
745 /*--------------------------------------------------------------------------------------*/
747 * XS Interface for perl code
751 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
755 if ((SSize_t) len <= 0)
757 for (i = 0; i < PL_known_layers->cur; i++) {
758 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
759 if (memEQ(f->name, name, len) && f->name[len] == 0) {
760 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
764 if (load && PL_subname && PL_def_layerlist
765 && PL_def_layerlist->cur >= 2) {
766 if (PL_in_load_module) {
767 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
770 SV * const pkgsv = newSVpvs("PerlIO");
771 SV * const layer = newSVpvn(name, len);
772 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
774 SAVEINT(PL_in_load_module);
776 SAVEGENERICSV(PL_warnhook);
777 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
781 * The two SVs are magically freed by load_module
783 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
786 return PerlIO_find_layer(aTHX_ name, len, 0);
789 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
793 #ifdef USE_ATTRIBUTES_FOR_PERLIO
796 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
799 IO * const io = GvIOn((GV *) SvRV(sv));
800 PerlIO * const ifp = IoIFP(io);
801 PerlIO * const ofp = IoOFP(io);
802 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
808 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
811 IO * const io = GvIOn((GV *) SvRV(sv));
812 PerlIO * const ifp = IoIFP(io);
813 PerlIO * const ofp = IoOFP(io);
814 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
820 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
822 Perl_warn(aTHX_ "clear %" SVf, sv);
827 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
829 Perl_warn(aTHX_ "free %" SVf, sv);
833 MGVTBL perlio_vtab = {
841 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
844 SV * const sv = SvRV(ST(1));
845 AV * const av = newAV();
849 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
851 mg = mg_find(sv, PERL_MAGIC_ext);
852 mg->mg_virtual = &perlio_vtab;
854 Perl_warn(aTHX_ "attrib %" SVf, sv);
855 for (i = 2; i < items; i++) {
857 const char * const name = SvPV_const(ST(i), len);
858 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
860 av_push(av, SvREFCNT_inc_simple_NN(layer));
871 #endif /* USE_ATTIBUTES_FOR_PERLIO */
874 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
876 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
877 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
881 XS(XS_PerlIO__Layer__NoWarnings)
883 /* This is used as a %SIG{__WARN__} handler to supress warnings
884 during loading of layers.
889 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
893 XS(XS_PerlIO__Layer__find)
898 Perl_croak(aTHX_ "Usage class->find(name[,load])");
901 const char * const name = SvPV_const(ST(1), len);
902 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
903 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
905 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
912 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
915 if (!PL_known_layers)
916 PL_known_layers = PerlIO_list_alloc(aTHX);
917 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
918 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
922 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
926 const char *s = names;
928 while (isSPACE(*s) || *s == ':')
933 const char *as = NULL;
935 if (!isIDFIRST(*s)) {
937 * Message is consistent with how attribute lists are
938 * passed. Even though this means "foo : : bar" is
939 * seen as an invalid separator character.
941 const char q = ((*s == '\'') ? '"' : '\'');
942 if (ckWARN(WARN_LAYER))
943 Perl_warner(aTHX_ packWARN(WARN_LAYER),
944 "Invalid separator character %c%c%c in PerlIO layer specification %s",
946 SETERRNO(EINVAL, LIB_INVARG);
951 } while (isALNUM(*e));
967 * It's a nul terminated string, not allowed
968 * to \ the terminating null. Anything other
969 * character is passed over.
979 if (ckWARN(WARN_LAYER))
980 Perl_warner(aTHX_ packWARN(WARN_LAYER),
981 "Argument list not closed for PerlIO layer \"%.*s\"",
993 PerlIO_funcs * const layer =
994 PerlIO_find_layer(aTHX_ s, llen, 1);
996 PerlIO_list_push(aTHX_ av, layer,
1002 if (ckWARN(WARN_LAYER))
1003 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1016 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1019 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1020 #ifdef PERLIO_USING_CRLF
1023 if (PerlIO_stdio.Set_ptrcnt)
1024 tab = &PerlIO_stdio;
1026 PerlIO_debug("Pushing %s\n", tab->name);
1027 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1032 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1034 return av->array[n].arg;
1038 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1040 if (n >= 0 && n < av->cur) {
1041 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1042 av->array[n].funcs->name);
1043 return av->array[n].funcs;
1046 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1051 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1053 PERL_UNUSED_ARG(mode);
1054 PERL_UNUSED_ARG(arg);
1055 PERL_UNUSED_ARG(tab);
1056 if (PerlIOValid(f)) {
1058 PerlIO_pop(aTHX_ f);
1064 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1065 sizeof(PerlIO_funcs),
1068 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1088 NULL, /* get_base */
1089 NULL, /* get_bufsiz */
1092 NULL, /* set_ptrcnt */
1096 PerlIO_default_layers(pTHX)
1099 if (!PL_def_layerlist) {
1100 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1101 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1102 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1103 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1105 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1107 osLayer = &PerlIO_win32;
1110 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1111 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1112 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1113 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1117 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1118 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1119 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1120 PerlIO_list_push(aTHX_ PL_def_layerlist,
1121 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1124 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1127 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1130 if (PL_def_layerlist->cur < 2) {
1131 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1133 return PL_def_layerlist;
1137 Perl_boot_core_PerlIO(pTHX)
1139 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1140 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1143 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1144 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1148 PerlIO_default_layer(pTHX_ I32 n)
1151 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1154 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1157 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1158 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1161 PerlIO_stdstreams(pTHX)
1165 PerlIO_allocate(aTHX);
1166 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1167 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1168 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1173 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1175 if (tab->fsize != sizeof(PerlIO_funcs)) {
1177 Perl_croak(aTHX_ "Layer does not match this perl");
1181 if (tab->size < sizeof(PerlIOl)) {
1184 /* Real layer with a data area */
1187 Newxz(temp, tab->size, char);
1191 l->tab = (PerlIO_funcs*) tab;
1193 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1194 (void*)f, tab->name,
1195 (mode) ? mode : "(Null)", (void*)arg);
1196 if (*l->tab->Pushed &&
1198 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1199 PerlIO_pop(aTHX_ f);
1208 /* Pseudo-layer where push does its own stack adjust */
1209 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1210 (mode) ? mode : "(Null)", (void*)arg);
1212 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1220 PerlIOBase_binmode(pTHX_ PerlIO *f)
1222 if (PerlIOValid(f)) {
1223 /* Is layer suitable for raw stream ? */
1224 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1225 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1226 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1229 /* Not suitable - pop it */
1230 PerlIO_pop(aTHX_ f);
1238 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1240 PERL_UNUSED_ARG(mode);
1241 PERL_UNUSED_ARG(arg);
1242 PERL_UNUSED_ARG(tab);
1244 if (PerlIOValid(f)) {
1249 * Strip all layers that are not suitable for a raw stream
1252 while (t && (l = *t)) {
1253 if (l->tab->Binmode) {
1254 /* Has a handler - normal case */
1255 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1257 /* Layer still there - move down a layer */
1266 /* No handler - pop it */
1267 PerlIO_pop(aTHX_ t);
1270 if (PerlIOValid(f)) {
1271 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1279 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1280 PerlIO_list_t *layers, IV n, IV max)
1284 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1286 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1297 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1301 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1302 code = PerlIO_parse_layers(aTHX_ layers, names);
1304 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1306 PerlIO_list_free(aTHX_ layers);
1312 /*--------------------------------------------------------------------------------------*/
1314 * Given the abstraction above the public API functions
1318 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1320 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1321 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1322 iotype, mode, (names) ? names : "(Null)");
1325 /* Do not flush etc. if (e.g.) switching encodings.
1326 if a pushed layer knows it needs to flush lower layers
1327 (for example :unix which is never going to call them)
1328 it can do the flush when it is pushed.
1330 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1333 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1334 #ifdef PERLIO_USING_CRLF
1335 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1336 O_BINARY so we can look for it in mode.
1338 if (!(mode & O_BINARY)) {
1340 /* FIXME?: Looking down the layer stack seems wrong,
1341 but is a way of reaching past (say) an encoding layer
1342 to flip CRLF-ness of the layer(s) below
1345 /* Perhaps we should turn on bottom-most aware layer
1346 e.g. Ilya's idea that UNIX TTY could serve
1348 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1349 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1350 /* Not in text mode - flush any pending stuff and flip it */
1352 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1354 /* Only need to turn it on in one layer so we are done */
1359 /* Not finding a CRLF aware layer presumably means we are binary
1360 which is not what was requested - so we failed
1361 We _could_ push :crlf layer but so could caller
1366 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1367 So code that used to be here is now in PerlIORaw_pushed().
1369 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1374 PerlIO__close(pTHX_ PerlIO *f)
1376 if (PerlIOValid(f)) {
1377 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1378 if (tab && tab->Close)
1379 return (*tab->Close)(aTHX_ f);
1381 return PerlIOBase_close(aTHX_ f);
1384 SETERRNO(EBADF, SS_IVCHAN);
1390 Perl_PerlIO_close(pTHX_ PerlIO *f)
1392 const int code = PerlIO__close(aTHX_ f);
1393 while (PerlIOValid(f)) {
1394 PerlIO_pop(aTHX_ f);
1400 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1403 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1407 PerlIO_context_layers(pTHX_ const char *mode)
1410 const char *type = NULL;
1412 * Need to supply default layer info from open.pm
1415 SV * const layers = PL_curcop->cop_io;
1418 type = SvPV_const(layers, len);
1419 if (type && mode[0] != 'r') {
1421 * Skip to write part
1423 const char * const s = strchr(type, 0);
1424 if (s && (STRLEN)(s - type) < len) {
1433 static PerlIO_funcs *
1434 PerlIO_layer_from_ref(pTHX_ SV *sv)
1438 * For any scalar type load the handler which is bundled with perl
1440 if (SvTYPE(sv) < SVt_PVAV)
1441 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1444 * For other types allow if layer is known but don't try and load it
1446 switch (SvTYPE(sv)) {
1448 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1450 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1452 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1454 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1460 PerlIO_resolve_layers(pTHX_ const char *layers,
1461 const char *mode, int narg, SV **args)
1464 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1467 PerlIO_stdstreams(aTHX);
1469 SV * const arg = *args;
1471 * If it is a reference but not an object see if we have a handler
1474 if (SvROK(arg) && !sv_isobject(arg)) {
1475 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1477 def = PerlIO_list_alloc(aTHX);
1478 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1482 * Don't fail if handler cannot be found :via(...) etc. may do
1483 * something sensible else we will just stringfy and open
1488 if (!layers || !*layers)
1489 layers = PerlIO_context_layers(aTHX_ mode);
1490 if (layers && *layers) {
1494 av = PerlIO_list_alloc(aTHX);
1495 for (i = 0; i < def->cur; i++) {
1496 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1503 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1507 PerlIO_list_free(aTHX_ av);
1519 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1520 int imode, int perm, PerlIO *f, int narg, SV **args)
1523 if (!f && narg == 1 && *args == &PL_sv_undef) {
1524 if ((f = PerlIO_tmpfile())) {
1525 if (!layers || !*layers)
1526 layers = PerlIO_context_layers(aTHX_ mode);
1527 if (layers && *layers)
1528 PerlIO_apply_layers(aTHX_ f, mode, layers);
1532 PerlIO_list_t *layera;
1534 PerlIO_funcs *tab = NULL;
1535 if (PerlIOValid(f)) {
1537 * This is "reopen" - it is not tested as perl does not use it
1541 layera = PerlIO_list_alloc(aTHX);
1543 SV * const arg = (l->tab->Getarg)
1544 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1546 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1547 l = *PerlIONext(&l);
1551 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1557 * Start at "top" of layer stack
1559 n = layera->cur - 1;
1561 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1570 * Found that layer 'n' can do opens - call it
1572 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1573 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1575 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1576 tab->name, layers ? layers : "(Null)", mode, fd,
1577 imode, perm, (void*)f, narg, (void*)args);
1579 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1582 SETERRNO(EINVAL, LIB_INVARG);
1586 if (n + 1 < layera->cur) {
1588 * More layers above the one that we used to open -
1591 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1592 /* If pushing layers fails close the file */
1599 PerlIO_list_free(aTHX_ layera);
1606 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1608 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1612 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1614 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1618 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1620 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1624 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1626 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1630 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1632 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1636 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1641 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1643 if (tab && tab->Flush)
1644 return (*tab->Flush) (aTHX_ f);
1646 return 0; /* If no Flush defined, silently succeed. */
1649 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1650 SETERRNO(EBADF, SS_IVCHAN);
1656 * Is it good API design to do flush-all on NULL, a potentially
1657 * errorneous input? Maybe some magical value (PerlIO*
1658 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1659 * things on fflush(NULL), but should we be bound by their design
1662 PerlIO **table = &PL_perlio;
1664 while ((f = *table)) {
1666 table = (PerlIO **) (f++);
1667 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1668 if (*f && PerlIO_flush(f) != 0)
1678 PerlIOBase_flush_linebuf(pTHX)
1681 PerlIO **table = &PL_perlio;
1683 while ((f = *table)) {
1685 table = (PerlIO **) (f++);
1686 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1689 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1690 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1698 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1700 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1704 PerlIO_isutf8(PerlIO *f)
1707 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1709 SETERRNO(EBADF, SS_IVCHAN);
1715 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1717 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1721 Perl_PerlIO_error(pTHX_ PerlIO *f)
1723 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1727 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1729 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1733 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1735 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1739 PerlIO_has_base(PerlIO *f)
1741 if (PerlIOValid(f)) {
1742 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1745 return (tab->Get_base != NULL);
1746 SETERRNO(EINVAL, LIB_INVARG);
1749 SETERRNO(EBADF, SS_IVCHAN);
1755 PerlIO_fast_gets(PerlIO *f)
1757 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1758 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1761 return (tab->Set_ptrcnt != NULL);
1762 SETERRNO(EINVAL, LIB_INVARG);
1765 SETERRNO(EBADF, SS_IVCHAN);
1771 PerlIO_has_cntptr(PerlIO *f)
1773 if (PerlIOValid(f)) {
1774 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1777 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1778 SETERRNO(EINVAL, LIB_INVARG);
1781 SETERRNO(EBADF, SS_IVCHAN);
1787 PerlIO_canset_cnt(PerlIO *f)
1789 if (PerlIOValid(f)) {
1790 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1793 return (tab->Set_ptrcnt != NULL);
1794 SETERRNO(EINVAL, LIB_INVARG);
1797 SETERRNO(EBADF, SS_IVCHAN);
1803 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1805 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1809 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1811 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1815 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1817 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1821 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1823 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1827 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1829 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1833 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1835 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1839 /*--------------------------------------------------------------------------------------*/
1841 * utf8 and raw dummy layers
1845 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1847 PERL_UNUSED_CONTEXT;
1848 PERL_UNUSED_ARG(mode);
1849 PERL_UNUSED_ARG(arg);
1850 if (PerlIOValid(f)) {
1851 if (tab->kind & PERLIO_K_UTF8)
1852 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1854 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1860 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1861 sizeof(PerlIO_funcs),
1864 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1884 NULL, /* get_base */
1885 NULL, /* get_bufsiz */
1888 NULL, /* set_ptrcnt */
1891 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1892 sizeof(PerlIO_funcs),
1915 NULL, /* get_base */
1916 NULL, /* get_bufsiz */
1919 NULL, /* set_ptrcnt */
1923 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1924 IV n, const char *mode, int fd, int imode, int perm,
1925 PerlIO *old, int narg, SV **args)
1927 PerlIO_funcs * const tab = PerlIO_default_btm();
1928 PERL_UNUSED_ARG(self);
1929 if (tab && tab->Open)
1930 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1932 SETERRNO(EINVAL, LIB_INVARG);
1936 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1937 sizeof(PerlIO_funcs),
1960 NULL, /* get_base */
1961 NULL, /* get_bufsiz */
1964 NULL, /* set_ptrcnt */
1966 /*--------------------------------------------------------------------------------------*/
1967 /*--------------------------------------------------------------------------------------*/
1969 * "Methods" of the "base class"
1973 PerlIOBase_fileno(pTHX_ PerlIO *f)
1975 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1979 PerlIO_modestr(PerlIO * f, char *buf)
1982 if (PerlIOValid(f)) {
1983 const IV flags = PerlIOBase(f)->flags;
1984 if (flags & PERLIO_F_APPEND) {
1986 if (flags & PERLIO_F_CANREAD) {
1990 else if (flags & PERLIO_F_CANREAD) {
1992 if (flags & PERLIO_F_CANWRITE)
1995 else if (flags & PERLIO_F_CANWRITE) {
1997 if (flags & PERLIO_F_CANREAD) {
2001 #ifdef PERLIO_USING_CRLF
2002 if (!(flags & PERLIO_F_CRLF))
2012 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2014 PerlIOl * const l = PerlIOBase(f);
2015 PERL_UNUSED_CONTEXT;
2016 PERL_UNUSED_ARG(arg);
2018 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2019 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2020 if (tab->Set_ptrcnt != NULL)
2021 l->flags |= PERLIO_F_FASTGETS;
2023 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2027 l->flags |= PERLIO_F_CANREAD;
2030 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2033 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2036 SETERRNO(EINVAL, LIB_INVARG);
2042 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2045 l->flags &= ~PERLIO_F_CRLF;
2048 l->flags |= PERLIO_F_CRLF;
2051 SETERRNO(EINVAL, LIB_INVARG);
2058 l->flags |= l->next->flags &
2059 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2064 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2065 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2066 l->flags, PerlIO_modestr(f, temp));
2072 PerlIOBase_popped(pTHX_ PerlIO *f)
2074 PERL_UNUSED_CONTEXT;
2080 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2083 * Save the position as current head considers it
2085 const Off_t old = PerlIO_tell(f);
2086 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2087 PerlIOSelf(f, PerlIOBuf)->posn = old;
2088 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2092 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2094 STDCHAR *buf = (STDCHAR *) vbuf;
2096 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2097 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2098 SETERRNO(EBADF, SS_IVCHAN);
2104 SSize_t avail = PerlIO_get_cnt(f);
2107 take = ((SSize_t)count < avail) ? count : avail;
2109 STDCHAR *ptr = PerlIO_get_ptr(f);
2110 Copy(ptr, buf, take, STDCHAR);
2111 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2114 if (avail == 0) /* set_ptrcnt could have reset avail */
2117 if (count > 0 && avail <= 0) {
2118 if (PerlIO_fill(f) != 0)
2123 return (buf - (STDCHAR *) vbuf);
2129 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2131 PERL_UNUSED_CONTEXT;
2137 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2139 PERL_UNUSED_CONTEXT;
2145 PerlIOBase_close(pTHX_ PerlIO *f)
2148 if (PerlIOValid(f)) {
2149 PerlIO *n = PerlIONext(f);
2150 code = PerlIO_flush(f);
2151 PerlIOBase(f)->flags &=
2152 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2153 while (PerlIOValid(n)) {
2154 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2155 if (tab && tab->Close) {
2156 if ((*tab->Close)(aTHX_ n) != 0)
2161 PerlIOBase(n)->flags &=
2162 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2168 SETERRNO(EBADF, SS_IVCHAN);
2174 PerlIOBase_eof(pTHX_ PerlIO *f)
2176 PERL_UNUSED_CONTEXT;
2177 if (PerlIOValid(f)) {
2178 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2184 PerlIOBase_error(pTHX_ PerlIO *f)
2186 PERL_UNUSED_CONTEXT;
2187 if (PerlIOValid(f)) {
2188 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2194 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2196 if (PerlIOValid(f)) {
2197 PerlIO * const n = PerlIONext(f);
2198 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2205 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2207 PERL_UNUSED_CONTEXT;
2208 if (PerlIOValid(f)) {
2209 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2214 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2220 return sv_dup(arg, param);
2223 return newSVsv(arg);
2226 PERL_UNUSED_ARG(param);
2227 return newSVsv(arg);
2232 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2234 PerlIO * const nexto = PerlIONext(o);
2235 if (PerlIOValid(nexto)) {
2236 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2237 if (tab && tab->Dup)
2238 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2240 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2243 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2246 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2247 self->name, (void*)f, (void*)o, (void*)param);
2249 arg = (*self->Getarg)(aTHX_ o, param, flags);
2253 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2262 perl_mutex PerlIO_mutex;
2265 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2267 /* Must be called with PerlIO_mutex locked. */
2269 S_more_refcounted_fds(pTHX_ const int new_fd) {
2270 const int old_max = PL_perlio_fd_refcnt_size;
2271 const int new_max = 16 + (new_fd & ~15);
2274 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2275 old_max, new_fd, new_max);
2277 if (new_fd < old_max) {
2281 assert (new_max > new_fd);
2284 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2288 MUTEX_UNLOCK(&PerlIO_mutex);
2290 /* Can't use PerlIO to write as it allocates memory */
2291 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2292 PL_no_mem, strlen(PL_no_mem));
2296 PL_perlio_fd_refcnt_size = new_max;
2297 PL_perlio_fd_refcnt = new_array;
2299 PerlIO_debug("Zeroing %p, %d\n", new_array + old_max, new_max - old_max);
2301 Zero(new_array + old_max, new_max - old_max, int);
2308 /* Place holder for stdstreams call ??? */
2310 MUTEX_INIT(&PerlIO_mutex);
2312 PERL_UNUSED_CONTEXT;
2317 PerlIOUnix_refcnt_inc(int fd)
2324 MUTEX_LOCK(&PerlIO_mutex);
2326 if (fd >= PL_perlio_fd_refcnt_size)
2327 S_more_refcounted_fds(aTHX_ fd);
2329 PL_perlio_fd_refcnt[fd]++;
2330 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2333 MUTEX_UNLOCK(&PerlIO_mutex);
2339 PerlIOUnix_refcnt_dec(int fd)
2346 MUTEX_LOCK(&PerlIO_mutex);
2348 /* XXX should this be a panic? */
2349 if (fd >= PL_perlio_fd_refcnt_size)
2350 S_more_refcounted_fds(aTHX_ fd);
2352 /* XXX should this be a panic if it drops below 0? */
2353 cnt = --PL_perlio_fd_refcnt[fd];
2354 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2356 MUTEX_UNLOCK(&PerlIO_mutex);
2363 PerlIO_cleanup(pTHX)
2368 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2370 PerlIO_debug("Cleanup layers\n");
2372 /* Raise STDIN..STDERR refcount so we don't close them */
2373 for (i=0; i < 3; i++)
2374 PerlIOUnix_refcnt_inc(i);
2375 PerlIO_cleantable(aTHX_ &PL_perlio);
2376 /* Restore STDIN..STDERR refcount */
2377 for (i=0; i < 3; i++)
2378 PerlIOUnix_refcnt_dec(i);
2380 if (PL_known_layers) {
2381 PerlIO_list_free(aTHX_ PL_known_layers);
2382 PL_known_layers = NULL;
2384 if (PL_def_layerlist) {
2385 PerlIO_list_free(aTHX_ PL_def_layerlist);
2386 PL_def_layerlist = NULL;
2392 /*--------------------------------------------------------------------------------------*/
2394 * Bottom-most level for UNIX-like case
2398 struct _PerlIO base; /* The generic part */
2399 int fd; /* UNIX like file descriptor */
2400 int oflags; /* open/fcntl flags */
2404 PerlIOUnix_oflags(const char *mode)
2407 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2412 if (*++mode == '+') {
2419 oflags = O_CREAT | O_TRUNC;
2420 if (*++mode == '+') {
2429 oflags = O_CREAT | O_APPEND;
2430 if (*++mode == '+') {
2443 else if (*mode == 't') {
2445 oflags &= ~O_BINARY;
2449 * Always open in binary mode
2452 if (*mode || oflags == -1) {
2453 SETERRNO(EINVAL, LIB_INVARG);
2460 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2462 PERL_UNUSED_CONTEXT;
2463 return PerlIOSelf(f, PerlIOUnix)->fd;
2467 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2469 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2472 if (PerlLIO_fstat(fd, &st) == 0) {
2473 if (!S_ISREG(st.st_mode)) {
2474 PerlIO_debug("%d is not regular file\n",fd);
2475 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2478 PerlIO_debug("%d _is_ a regular file\n",fd);
2484 PerlIOUnix_refcnt_inc(fd);
2485 PERL_UNUSED_CONTEXT;
2489 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2491 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2492 if (*PerlIONext(f)) {
2493 /* We never call down so do any pending stuff now */
2494 PerlIO_flush(PerlIONext(f));
2496 * XXX could (or should) we retrieve the oflags from the open file
2497 * handle rather than believing the "mode" we are passed in? XXX
2498 * Should the value on NULL mode be 0 or -1?
2500 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2501 mode ? PerlIOUnix_oflags(mode) : -1);
2503 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2509 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2511 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2513 PERL_UNUSED_CONTEXT;
2514 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2516 SETERRNO(ESPIPE, LIB_INVARG);
2518 SETERRNO(EINVAL, LIB_INVARG);
2522 new_loc = PerlLIO_lseek(fd, offset, whence);
2523 if (new_loc == (Off_t) - 1)
2525 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2530 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2531 IV n, const char *mode, int fd, int imode,
2532 int perm, PerlIO *f, int narg, SV **args)
2534 if (PerlIOValid(f)) {
2535 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2536 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2539 if (*mode == IoTYPE_NUMERIC)
2542 imode = PerlIOUnix_oflags(mode);
2546 const char *path = SvPV_nolen_const(*args);
2547 fd = PerlLIO_open3(path, imode, perm);
2551 if (*mode == IoTYPE_IMPLICIT)
2554 f = PerlIO_allocate(aTHX);
2556 if (!PerlIOValid(f)) {
2557 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2561 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2562 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2563 if (*mode == IoTYPE_APPEND)
2564 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2571 * FIXME: pop layers ???
2579 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2581 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2583 if (flags & PERLIO_DUP_FD) {
2584 fd = PerlLIO_dup(fd);
2587 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2589 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2590 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2599 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2602 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2603 #ifdef PERLIO_STD_SPECIAL
2605 return PERLIO_STD_IN(fd, vbuf, count);
2607 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2608 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2612 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2613 if (len >= 0 || errno != EINTR) {
2615 if (errno != EAGAIN) {
2616 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2619 else if (len == 0 && count != 0) {
2620 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2631 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2634 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2635 #ifdef PERLIO_STD_SPECIAL
2636 if (fd == 1 || fd == 2)
2637 return PERLIO_STD_OUT(fd, vbuf, count);
2640 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2641 if (len >= 0 || errno != EINTR) {
2643 if (errno != EAGAIN) {
2644 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2655 PerlIOUnix_tell(pTHX_ PerlIO *f)
2657 PERL_UNUSED_CONTEXT;
2659 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2664 PerlIOUnix_close(pTHX_ PerlIO *f)
2667 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2669 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2670 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2671 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2676 SETERRNO(EBADF,SS_IVCHAN);
2679 while (PerlLIO_close(fd) != 0) {
2680 if (errno != EINTR) {
2687 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2692 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2693 sizeof(PerlIO_funcs),
2700 PerlIOBase_binmode, /* binmode */
2710 PerlIOBase_noop_ok, /* flush */
2711 PerlIOBase_noop_fail, /* fill */
2714 PerlIOBase_clearerr,
2715 PerlIOBase_setlinebuf,
2716 NULL, /* get_base */
2717 NULL, /* get_bufsiz */
2720 NULL, /* set_ptrcnt */
2723 /*--------------------------------------------------------------------------------------*/
2728 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2729 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2730 broken by the last second glibc 2.3 fix
2732 #define STDIO_BUFFER_WRITABLE
2737 struct _PerlIO base;
2738 FILE *stdio; /* The stream */
2742 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2744 PERL_UNUSED_CONTEXT;
2746 if (PerlIOValid(f)) {
2747 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2749 return PerlSIO_fileno(s);
2756 PerlIOStdio_mode(const char *mode, char *tmode)
2758 char * const ret = tmode;
2764 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2772 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2775 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2776 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2777 if (toptab == tab) {
2778 /* Top is already stdio - pop self (duplicate) and use original */
2779 PerlIO_pop(aTHX_ f);
2782 const int fd = PerlIO_fileno(n);
2785 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2786 mode = PerlIOStdio_mode(mode, tmode)))) {
2787 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2788 /* We never call down so do any pending stuff now */
2789 PerlIO_flush(PerlIONext(f));
2796 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2801 PerlIO_importFILE(FILE *stdio, const char *mode)
2807 if (!mode || !*mode) {
2808 /* We need to probe to see how we can open the stream
2809 so start with read/write and then try write and read
2810 we dup() so that we can fclose without loosing the fd.
2812 Note that the errno value set by a failing fdopen
2813 varies between stdio implementations.
2815 const int fd = PerlLIO_dup(fileno(stdio));
2816 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2818 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2821 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2824 /* Don't seem to be able to open */
2830 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2831 s = PerlIOSelf(f, PerlIOStdio);
2839 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2840 IV n, const char *mode, int fd, int imode,
2841 int perm, PerlIO *f, int narg, SV **args)
2844 if (PerlIOValid(f)) {
2845 const char * const path = SvPV_nolen_const(*args);
2846 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2848 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2849 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2854 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2859 const char * const path = SvPV_nolen_const(*args);
2860 if (*mode == IoTYPE_NUMERIC) {
2862 fd = PerlLIO_open3(path, imode, perm);
2866 bool appended = FALSE;
2868 /* Cygwin wants its 'b' early. */
2870 mode = PerlIOStdio_mode(mode, tmode);
2872 stdio = PerlSIO_fopen(path, mode);
2875 f = PerlIO_allocate(aTHX);
2878 mode = PerlIOStdio_mode(mode, tmode);
2879 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2881 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2882 PerlIOUnix_refcnt_inc(fileno(stdio));
2884 PerlSIO_fclose(stdio);
2896 if (*mode == IoTYPE_IMPLICIT) {
2903 stdio = PerlSIO_stdin;
2906 stdio = PerlSIO_stdout;
2909 stdio = PerlSIO_stderr;
2914 stdio = PerlSIO_fdopen(fd, mode =
2915 PerlIOStdio_mode(mode, tmode));
2919 f = PerlIO_allocate(aTHX);
2921 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2922 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2923 PerlIOUnix_refcnt_inc(fileno(stdio));
2933 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2935 /* This assumes no layers underneath - which is what
2936 happens, but is not how I remember it. NI-S 2001/10/16
2938 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2939 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2940 const int fd = fileno(stdio);
2942 if (flags & PERLIO_DUP_FD) {
2943 const int dfd = PerlLIO_dup(fileno(stdio));
2945 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2950 /* FIXME: To avoid messy error recovery if dup fails
2951 re-use the existing stdio as though flag was not set
2955 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2957 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2958 PerlIOUnix_refcnt_inc(fileno(stdio));
2964 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2966 PERL_UNUSED_CONTEXT;
2968 /* XXX this could use PerlIO_canset_fileno() and
2969 * PerlIO_set_fileno() support from Configure
2971 # if defined(__UCLIBC__)
2972 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2975 # elif defined(__GLIBC__)
2976 /* There may be a better way for GLIBC:
2977 - libio.h defines a flag to not close() on cleanup
2981 # elif defined(__sun__)
2983 # elif defined(__hpux)
2987 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2988 your platform does not have special entry try this one.
2989 [For OSF only have confirmation for Tru64 (alpha)
2990 but assume other OSFs will be similar.]
2992 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2995 # elif defined(__FreeBSD__)
2996 /* There may be a better way on FreeBSD:
2997 - we could insert a dummy func in the _close function entry
2998 f->_close = (int (*)(void *)) dummy_close;
3002 # elif defined(__OpenBSD__)
3003 /* There may be a better way on OpenBSD:
3004 - we could insert a dummy func in the _close function entry
3005 f->_close = (int (*)(void *)) dummy_close;
3009 # elif defined(__EMX__)
3010 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3013 # elif defined(__CYGWIN__)
3014 /* There may be a better way on CYGWIN:
3015 - we could insert a dummy func in the _close function entry
3016 f->_close = (int (*)(void *)) dummy_close;
3020 # elif defined(WIN32)
3021 # if defined(__BORLANDC__)
3022 f->fd = PerlLIO_dup(fileno(f));
3023 # elif defined(UNDER_CE)
3024 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3033 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3034 (which isn't thread safe) instead
3036 # error "Don't know how to set FILE.fileno on your platform"
3044 PerlIOStdio_close(pTHX_ PerlIO *f)
3046 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3052 const int fd = fileno(stdio);
3057 #ifdef SOCKS5_VERSION_NAME
3058 /* Socks lib overrides close() but stdio isn't linked to
3059 that library (though we are) - so we must call close()
3060 on sockets on stdio's behalf.
3063 Sock_size_t optlen = sizeof(int);
3064 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3067 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3070 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3071 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3073 if (stdio == stdout || stdio == stderr)
3074 return PerlIO_flush(f);
3075 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3076 Use Sarathy's trick from maint-5.6 to invalidate the
3077 fileno slot of the FILE *
3079 result = PerlIO_flush(f);
3081 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3083 dupfd = PerlLIO_dup(fd);
3085 result = PerlSIO_fclose(stdio);
3086 /* We treat error from stdio as success if we invalidated
3087 errno may NOT be expected EBADF
3089 if (invalidate && result != 0) {
3093 #ifdef SOCKS5_VERSION_NAME
3094 /* in SOCKS' case, let close() determine return value */
3098 PerlLIO_dup2(dupfd,fd);
3099 PerlLIO_close(dupfd);
3106 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3109 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3113 STDCHAR *buf = (STDCHAR *) vbuf;
3115 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3116 * stdio does not do that for fread()
3118 const int ch = PerlSIO_fgetc(s);
3125 got = PerlSIO_fread(vbuf, 1, count, s);
3126 if (got == 0 && PerlSIO_ferror(s))
3128 if (got >= 0 || errno != EINTR)
3131 SETERRNO(0,0); /* just in case */
3137 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3140 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3142 #ifdef STDIO_BUFFER_WRITABLE
3143 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3144 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3145 STDCHAR *base = PerlIO_get_base(f);
3146 SSize_t cnt = PerlIO_get_cnt(f);
3147 STDCHAR *ptr = PerlIO_get_ptr(f);
3148 SSize_t avail = ptr - base;
3150 if (avail > count) {
3154 Move(buf-avail,ptr,avail,STDCHAR);
3157 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3158 if (PerlSIO_feof(s) && unread >= 0)
3159 PerlSIO_clearerr(s);
3164 if (PerlIO_has_cntptr(f)) {
3165 /* We can get pointer to buffer but not its base
3166 Do ungetc() but check chars are ending up in the
3169 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3170 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3172 const int ch = *--buf & 0xFF;
3173 if (ungetc(ch,s) != ch) {
3174 /* ungetc did not work */
3177 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3178 /* Did not change pointer as expected */
3179 fgetc(s); /* get char back again */
3189 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3195 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3200 got = PerlSIO_fwrite(vbuf, 1, count,
3201 PerlIOSelf(f, PerlIOStdio)->stdio);
3202 if (got >= 0 || errno != EINTR)
3205 SETERRNO(0,0); /* just in case */
3211 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3213 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3214 PERL_UNUSED_CONTEXT;
3216 return PerlSIO_fseek(stdio, offset, whence);
3220 PerlIOStdio_tell(pTHX_ PerlIO *f)
3222 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3223 PERL_UNUSED_CONTEXT;
3225 return PerlSIO_ftell(stdio);
3229 PerlIOStdio_flush(pTHX_ PerlIO *f)
3231 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3232 PERL_UNUSED_CONTEXT;
3234 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3235 return PerlSIO_fflush(stdio);
3241 * FIXME: This discards ungetc() and pre-read stuff which is not
3242 * right if this is just a "sync" from a layer above Suspect right
3243 * design is to do _this_ but not have layer above flush this
3244 * layer read-to-read
3247 * Not writeable - sync by attempting a seek
3249 const int err = errno;
3250 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3258 PerlIOStdio_eof(pTHX_ PerlIO *f)
3260 PERL_UNUSED_CONTEXT;
3262 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3266 PerlIOStdio_error(pTHX_ PerlIO *f)
3268 PERL_UNUSED_CONTEXT;
3270 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3274 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3276 PERL_UNUSED_CONTEXT;
3278 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3282 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3284 PERL_UNUSED_CONTEXT;
3286 #ifdef HAS_SETLINEBUF
3287 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3289 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3295 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3297 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3298 return (STDCHAR*)PerlSIO_get_base(stdio);
3302 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3304 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3305 return PerlSIO_get_bufsiz(stdio);
3309 #ifdef USE_STDIO_PTR
3311 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3313 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3314 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3318 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3320 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3321 return PerlSIO_get_cnt(stdio);
3325 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3327 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3329 #ifdef STDIO_PTR_LVALUE
3330 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3331 #ifdef STDIO_PTR_LVAL_SETS_CNT
3332 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3333 assert(PerlSIO_get_cnt(stdio) == (cnt));
3336 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3338 * Setting ptr _does_ change cnt - we are done
3342 #else /* STDIO_PTR_LVALUE */
3344 #endif /* STDIO_PTR_LVALUE */
3347 * Now (or only) set cnt
3349 #ifdef STDIO_CNT_LVALUE
3350 PerlSIO_set_cnt(stdio, cnt);
3351 #else /* STDIO_CNT_LVALUE */
3352 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3353 PerlSIO_set_ptr(stdio,
3354 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3356 #else /* STDIO_PTR_LVAL_SETS_CNT */
3358 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3359 #endif /* STDIO_CNT_LVALUE */
3366 PerlIOStdio_fill(pTHX_ PerlIO *f)
3368 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3370 PERL_UNUSED_CONTEXT;
3373 * fflush()ing read-only streams can cause trouble on some stdio-s
3375 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3376 if (PerlSIO_fflush(stdio) != 0)
3379 c = PerlSIO_fgetc(stdio);
3383 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3385 #ifdef STDIO_BUFFER_WRITABLE
3386 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3387 /* Fake ungetc() to the real buffer in case system's ungetc
3390 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3391 SSize_t cnt = PerlSIO_get_cnt(stdio);
3392 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3393 if (ptr == base+1) {
3394 *--ptr = (STDCHAR) c;
3395 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3396 if (PerlSIO_feof(stdio))
3397 PerlSIO_clearerr(stdio);
3403 if (PerlIO_has_cntptr(f)) {
3405 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3412 /* An ungetc()d char is handled separately from the regular
3413 * buffer, so we stuff it in the buffer ourselves.
3414 * Should never get called as should hit code above
3416 *(--((*stdio)->_ptr)) = (unsigned char) c;
3419 /* If buffer snoop scheme above fails fall back to
3422 if (PerlSIO_ungetc(c, stdio) != c)
3430 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3431 sizeof(PerlIO_funcs),
3433 sizeof(PerlIOStdio),
3434 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3438 PerlIOBase_binmode, /* binmode */
3452 PerlIOStdio_clearerr,
3453 PerlIOStdio_setlinebuf,
3455 PerlIOStdio_get_base,
3456 PerlIOStdio_get_bufsiz,
3461 #ifdef USE_STDIO_PTR
3462 PerlIOStdio_get_ptr,
3463 PerlIOStdio_get_cnt,
3464 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3465 PerlIOStdio_set_ptrcnt,
3468 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3473 #endif /* USE_STDIO_PTR */
3476 /* Note that calls to PerlIO_exportFILE() are reversed using
3477 * PerlIO_releaseFILE(), not importFILE. */
3479 PerlIO_exportFILE(PerlIO * f, const char *mode)
3483 if (PerlIOValid(f)) {
3486 if (!mode || !*mode) {
3487 mode = PerlIO_modestr(f, buf);
3489 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3493 /* De-link any lower layers so new :stdio sticks */
3495 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3496 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3498 /* Link previous lower layers under new one */
3502 /* restore layers list */
3512 PerlIO_findFILE(PerlIO *f)
3516 if (l->tab == &PerlIO_stdio) {
3517 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3520 l = *PerlIONext(&l);
3522 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3523 return PerlIO_exportFILE(f, NULL);
3526 /* Use this to reverse PerlIO_exportFILE calls. */
3528 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3533 if (l->tab == &PerlIO_stdio) {
3534 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3535 if (s->stdio == f) {
3537 PerlIO_pop(aTHX_ p);
3546 /*--------------------------------------------------------------------------------------*/
3548 * perlio buffer layer
3552 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3554 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3555 const int fd = PerlIO_fileno(f);
3556 if (fd >= 0 && PerlLIO_isatty(fd)) {
3557 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3559 if (*PerlIONext(f)) {
3560 const Off_t posn = PerlIO_tell(PerlIONext(f));
3561 if (posn != (Off_t) - 1) {
3565 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3569 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3570 IV n, const char *mode, int fd, int imode, int perm,
3571 PerlIO *f, int narg, SV **args)
3573 if (PerlIOValid(f)) {
3574 PerlIO *next = PerlIONext(f);
3576 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3577 if (tab && tab->Open)
3579 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3581 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3586 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3588 if (*mode == IoTYPE_IMPLICIT) {
3594 if (tab && tab->Open)
3595 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3598 SETERRNO(EINVAL, LIB_INVARG);
3600 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3602 * if push fails during open, open fails. close will pop us.
3607 fd = PerlIO_fileno(f);
3608 if (init && fd == 2) {
3610 * Initial stderr is unbuffered
3612 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3614 #ifdef PERLIO_USING_CRLF
3615 # ifdef PERLIO_IS_BINMODE_FD
3616 if (PERLIO_IS_BINMODE_FD(fd))
3617 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3621 * do something about failing setmode()? --jhi
3623 PerlLIO_setmode(fd, O_BINARY);
3632 * This "flush" is akin to sfio's sync in that it handles files in either
3633 * read or write state. For write state, we put the postponed data through
3634 * the next layers. For read state, we seek() the next layers to the
3635 * offset given by current position in the buffer, and discard the buffer
3636 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3637 * in any case?). Then the pass the stick further in chain.
3640 PerlIOBuf_flush(pTHX_ PerlIO *f)
3642 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3644 PerlIO *n = PerlIONext(f);
3645 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3647 * write() the buffer
3649 const STDCHAR *buf = b->buf;
3650 const STDCHAR *p = buf;
3651 while (p < b->ptr) {
3652 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3656 else if (count < 0 || PerlIO_error(n)) {
3657 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3662 b->posn += (p - buf);
3664 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3665 STDCHAR *buf = PerlIO_get_base(f);
3667 * Note position change
3669 b->posn += (b->ptr - buf);
3670 if (b->ptr < b->end) {
3671 /* We did not consume all of it - try and seek downstream to
3672 our logical position
3674 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3675 /* Reload n as some layers may pop themselves on seek */
3676 b->posn = PerlIO_tell(n = PerlIONext(f));
3679 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3680 data is lost for good - so return saying "ok" having undone
3683 b->posn -= (b->ptr - buf);
3688 b->ptr = b->end = b->buf;
3689 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3690 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3691 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3696 /* This discards the content of the buffer after b->ptr, and rereads
3697 * the buffer from the position off in the layer downstream; here off
3698 * is at offset corresponding to b->ptr - b->buf.
3701 PerlIOBuf_fill(pTHX_ PerlIO *f)
3703 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3704 PerlIO *n = PerlIONext(f);
3707 * Down-stream flush is defined not to loose read data so is harmless.
3708 * we would not normally be fill'ing if there was data left in anycase.
3710 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3712 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3713 PerlIOBase_flush_linebuf(aTHX);
3716 PerlIO_get_base(f); /* allocate via vtable */
3718 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3720 b->ptr = b->end = b->buf;
3722 if (!PerlIOValid(n)) {
3723 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3727 if (PerlIO_fast_gets(n)) {
3729 * Layer below is also buffered. We do _NOT_ want to call its
3730 * ->Read() because that will loop till it gets what we asked for
3731 * which may hang on a pipe etc. Instead take anything it has to
3732 * hand, or ask it to fill _once_.
3734 avail = PerlIO_get_cnt(n);
3736 avail = PerlIO_fill(n);
3738 avail = PerlIO_get_cnt(n);
3740 if (!PerlIO_error(n) && PerlIO_eof(n))
3745 STDCHAR *ptr = PerlIO_get_ptr(n);
3746 const SSize_t cnt = avail;
3747 if (avail > (SSize_t)b->bufsiz)
3749 Copy(ptr, b->buf, avail, STDCHAR);
3750 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3754 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3758 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3760 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3763 b->end = b->buf + avail;
3764 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3769 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3771 if (PerlIOValid(f)) {
3772 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3775 return PerlIOBase_read(aTHX_ f, vbuf, count);
3781 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3783 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3784 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3787 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3792 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3794 * Buffer is already a read buffer, we can overwrite any chars
3795 * which have been read back to buffer start
3797 avail = (b->ptr - b->buf);
3801 * Buffer is idle, set it up so whole buffer is available for
3805 b->end = b->buf + avail;
3807 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3809 * Buffer extends _back_ from where we are now
3811 b->posn -= b->bufsiz;
3813 if (avail > (SSize_t) count) {
3815 * If we have space for more than count, just move count
3823 * In simple stdio-like ungetc() case chars will be already
3826 if (buf != b->ptr) {
3827 Copy(buf, b->ptr, avail, STDCHAR);
3831 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3835 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3841 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3843 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3844 const STDCHAR *buf = (const STDCHAR *) vbuf;
3845 const STDCHAR *flushptr = buf;
3849 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3851 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3852 if (PerlIO_flush(f) != 0) {
3856 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3857 flushptr = buf + count;
3858 while (flushptr > buf && *(flushptr - 1) != '\n')
3862 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3863 if ((SSize_t) count < avail)
3865 if (flushptr > buf && flushptr <= buf + avail)
3866 avail = flushptr - buf;
3867 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3869 Copy(buf, b->ptr, avail, STDCHAR);
3874 if (buf == flushptr)
3877 if (b->ptr >= (b->buf + b->bufsiz))
3880 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3886 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3889 if ((code = PerlIO_flush(f)) == 0) {
3890 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3891 code = PerlIO_seek(PerlIONext(f), offset, whence);
3893 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3894 b->posn = PerlIO_tell(PerlIONext(f));
3901 PerlIOBuf_tell(pTHX_ PerlIO *f)
3903 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3905 * b->posn is file position where b->buf was read, or will be written
3907 Off_t posn = b->posn;
3908 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3909 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3911 /* As O_APPEND files are normally shared in some sense it is better
3916 /* when file is NOT shared then this is sufficient */
3917 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3919 posn = b->posn = PerlIO_tell(PerlIONext(f));
3923 * If buffer is valid adjust position by amount in buffer
3925 posn += (b->ptr - b->buf);
3931 PerlIOBuf_popped(pTHX_ PerlIO *f)
3933 const IV code = PerlIOBase_popped(aTHX_ f);
3934 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3935 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3938 b->ptr = b->end = b->buf = NULL;
3939 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3944 PerlIOBuf_close(pTHX_ PerlIO *f)
3946 const IV code = PerlIOBase_close(aTHX_ f);
3947 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3948 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3951 b->ptr = b->end = b->buf = NULL;
3952 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3957 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3959 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3966 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3968 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3971 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3972 return (b->end - b->ptr);
3977 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3979 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3980 PERL_UNUSED_CONTEXT;
3985 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3987 b->buf = (STDCHAR *) & b->oneword;
3988 b->bufsiz = sizeof(b->oneword);
3990 b->end = b->ptr = b->buf;
3996 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3998 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4001 return (b->end - b->buf);
4005 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4007 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4011 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4012 assert(PerlIO_get_cnt(f) == cnt);
4013 assert(b->ptr >= b->buf);
4015 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4019 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4021 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4026 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4027 sizeof(PerlIO_funcs),
4030 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4034 PerlIOBase_binmode, /* binmode */
4048 PerlIOBase_clearerr,
4049 PerlIOBase_setlinebuf,
4054 PerlIOBuf_set_ptrcnt,
4057 /*--------------------------------------------------------------------------------------*/
4059 * Temp layer to hold unread chars when cannot do it any other way
4063 PerlIOPending_fill(pTHX_ PerlIO *f)
4066 * Should never happen
4073 PerlIOPending_close(pTHX_ PerlIO *f)
4076 * A tad tricky - flush pops us, then we close new top
4079 return PerlIO_close(f);
4083 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4086 * A tad tricky - flush pops us, then we seek new top
4089 return PerlIO_seek(f, offset, whence);
4094 PerlIOPending_flush(pTHX_ PerlIO *f)
4096 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4097 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4101 PerlIO_pop(aTHX_ f);
4106 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4112 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4117 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4119 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4120 PerlIOl * const l = PerlIOBase(f);
4122 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4123 * etc. get muddled when it changes mid-string when we auto-pop.
4125 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4126 (PerlIOBase(PerlIONext(f))->
4127 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4132 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4134 SSize_t avail = PerlIO_get_cnt(f);
4136 if ((SSize_t)count < avail)
4139 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4140 if (got >= 0 && got < (SSize_t)count) {
4141 const SSize_t more =
4142 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4143 if (more >= 0 || got == 0)
4149 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4150 sizeof(PerlIO_funcs),
4153 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4154 PerlIOPending_pushed,
4157 PerlIOBase_binmode, /* binmode */
4166 PerlIOPending_close,
4167 PerlIOPending_flush,
4171 PerlIOBase_clearerr,
4172 PerlIOBase_setlinebuf,
4177 PerlIOPending_set_ptrcnt,
4182 /*--------------------------------------------------------------------------------------*/
4184 * crlf - translation On read translate CR,LF to "\n" we do this by
4185 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4186 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4188 * c->nl points on the first byte of CR LF pair when it is temporarily
4189 * replaced by LF, or to the last CR of the buffer. In the former case
4190 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4191 * that it ends at c->nl; these two cases can be distinguished by
4192 * *c->nl. c->nl is set during _getcnt() call, and unset during
4193 * _unread() and _flush() calls.
4194 * It only matters for read operations.
4198 PerlIOBuf base; /* PerlIOBuf stuff */
4199 STDCHAR *nl; /* Position of crlf we "lied" about in the
4204 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4207 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4208 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4210 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4211 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4212 PerlIOBase(f)->flags);
4215 /* Enable the first CRLF capable layer you can find, but if none
4216 * found, the one we just pushed is fine. This results in at
4217 * any given moment at most one CRLF-capable layer being enabled
4218 * in the whole layer stack. */
4219 PerlIO *g = PerlIONext(f);
4221 PerlIOl *b = PerlIOBase(g);
4222 if (b && b->tab == &PerlIO_crlf) {
4223 if (!(b->flags & PERLIO_F_CRLF))
4224 b->flags |= PERLIO_F_CRLF;
4225 PerlIO_pop(aTHX_ f);
4236 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4238 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4239 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4243 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4244 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4246 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4247 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4249 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4254 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4255 b->end = b->ptr = b->buf + b->bufsiz;
4256 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4257 b->posn -= b->bufsiz;
4259 while (count > 0 && b->ptr > b->buf) {
4260 const int ch = *--buf;
4262 if (b->ptr - 2 >= b->buf) {
4269 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4270 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4286 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4288 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4290 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4293 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4294 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4295 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4296 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4298 while (nl < b->end && *nl != 0xd)
4300 if (nl < b->end && *nl == 0xd) {
4302 if (nl + 1 < b->end) {
4309 * Not CR,LF but just CR
4317 * Blast - found CR as last char in buffer
4322 * They may not care, defer work as long as
4326 return (nl - b->ptr);
4330 b->ptr++; /* say we have read it as far as
4331 * flush() is concerned */
4332 b->buf++; /* Leave space in front of buffer */
4333 /* Note as we have moved buf up flush's
4335 will naturally make posn point at CR
4337 b->bufsiz--; /* Buffer is thus smaller */
4338 code = PerlIO_fill(f); /* Fetch some more */
4339 b->bufsiz++; /* Restore size for next time */
4340 b->buf--; /* Point at space */
4341 b->ptr = nl = b->buf; /* Which is what we hand
4343 *nl = 0xd; /* Fill in the CR */
4345 goto test; /* fill() call worked */
4347 * CR at EOF - just fall through
4349 /* Should we clear EOF though ??? */
4354 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4360 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4362 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4363 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4369 if (ptr == b->end && *c->nl == 0xd) {
4370 /* Defered CR at end of buffer case - we lied about count */
4383 * Test code - delete when it works ...
4385 IV flags = PerlIOBase(f)->flags;
4386 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4387 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4388 /* Defered CR at end of buffer case - we lied about count */
4394 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4395 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4403 * They have taken what we lied about
4411 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4415 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4417 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4418 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4420 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4421 const STDCHAR *buf = (const STDCHAR *) vbuf;
4422 const STDCHAR * const ebuf = buf + count;
4425 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4427 while (buf < ebuf) {
4428 const STDCHAR * const eptr = b->buf + b->bufsiz;
4429 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4430 while (buf < ebuf && b->ptr < eptr) {
4432 if ((b->ptr + 2) > eptr) {
4440 *(b->ptr)++ = 0xd; /* CR */
4441 *(b->ptr)++ = 0xa; /* LF */
4443 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4450 *(b->ptr)++ = *buf++;
4452 if (b->ptr >= eptr) {
4458 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4460 return (buf - (STDCHAR *) vbuf);
4465 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4467 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4472 return PerlIOBuf_flush(aTHX_ f);
4476 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4478 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4479 /* In text mode - flush any pending stuff and flip it */
4480 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4481 #ifndef PERLIO_USING_CRLF
4482 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4483 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4484 PerlIO_pop(aTHX_ f);
4491 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4492 sizeof(PerlIO_funcs),
4495 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4497 PerlIOBuf_popped, /* popped */
4499 PerlIOCrlf_binmode, /* binmode */
4503 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4504 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4505 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4513 PerlIOBase_clearerr,
4514 PerlIOBase_setlinebuf,
4519 PerlIOCrlf_set_ptrcnt,
4523 /*--------------------------------------------------------------------------------------*/
4525 * mmap as "buffer" layer
4529 PerlIOBuf base; /* PerlIOBuf stuff */
4530 Mmap_t mptr; /* Mapped address */
4531 Size_t len; /* mapped length */
4532 STDCHAR *bbuf; /* malloced buffer if map fails */
4536 PerlIOMmap_map(pTHX_ PerlIO *f)
4539 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4540 const IV flags = PerlIOBase(f)->flags;
4544 if (flags & PERLIO_F_CANREAD) {
4545 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4546 const int fd = PerlIO_fileno(f);
4548 code = Fstat(fd, &st);
4549 if (code == 0 && S_ISREG(st.st_mode)) {
4550 SSize_t len = st.st_size - b->posn;
4553 if (PL_mmap_page_size <= 0)
4554 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4558 * This is a hack - should never happen - open should
4561 b->posn = PerlIO_tell(PerlIONext(f));
4563 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4564 len = st.st_size - posn;
4565 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4566 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4567 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4568 madvise(m->mptr, len, MADV_SEQUENTIAL);
4570 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4571 madvise(m->mptr, len, MADV_WILLNEED);
4573 PerlIOBase(f)->flags =
4574 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4575 b->end = ((STDCHAR *) m->mptr) + len;
4576 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4585 PerlIOBase(f)->flags =
4586 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4588 b->ptr = b->end = b->ptr;
4597 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4599 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4602 PerlIOBuf * const b = &m->base;
4604 code = munmap(m->mptr, m->len);
4608 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4611 b->ptr = b->end = b->buf;
4612 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4618 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4620 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4621 PerlIOBuf * const b = &m->base;
4622 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4624 * Already have a readbuffer in progress
4630 * We have a write buffer or flushed PerlIOBuf read buffer
4632 m->bbuf = b->buf; /* save it in case we need it again */
4633 b->buf = NULL; /* Clear to trigger below */
4636 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4639 * Map did not work - recover PerlIOBuf buffer if we have one
4644 b->ptr = b->end = b->buf;
4647 return PerlIOBuf_get_base(aTHX_ f);
4651 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4653 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4654 PerlIOBuf * const b = &m->base;
4655 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4657 if (b->ptr && (b->ptr - count) >= b->buf
4658 && memEQ(b->ptr - count, vbuf, count)) {
4660 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4665 * Loose the unwritable mapped buffer
4669 * If flush took the "buffer" see if we have one from before
4671 if (!b->buf && m->bbuf)
4674 PerlIOBuf_get_base(aTHX_ f);
4678 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4682 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4684 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4685 PerlIOBuf * const b = &m->base;
4687 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4689 * No, or wrong sort of, buffer
4692 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4696 * If unmap took the "buffer" see if we have one from before
4698 if (!b->buf && m->bbuf)
4701 PerlIOBuf_get_base(aTHX_ f);
4705 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4709 PerlIOMmap_flush(pTHX_ PerlIO *f)
4711 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4712 PerlIOBuf * const b = &m->base;
4713 IV code = PerlIOBuf_flush(aTHX_ f);
4715 * Now we are "synced" at PerlIOBuf level
4722 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4727 * We seem to have a PerlIOBuf buffer which was not mapped
4728 * remember it in case we need one later
4737 PerlIOMmap_fill(pTHX_ PerlIO *f)
4739 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4740 IV code = PerlIO_flush(f);
4741 if (code == 0 && !b->buf) {
4742 code = PerlIOMmap_map(aTHX_ f);
4744 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4745 code = PerlIOBuf_fill(aTHX_ f);
4751 PerlIOMmap_close(pTHX_ PerlIO *f)
4753 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4754 PerlIOBuf * const b = &m->base;
4755 IV code = PerlIO_flush(f);
4759 b->ptr = b->end = b->buf;
4761 if (PerlIOBuf_close(aTHX_ f) != 0)
4767 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4769 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4773 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4774 sizeof(PerlIO_funcs),
4777 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4781 PerlIOBase_binmode, /* binmode */
4795 PerlIOBase_clearerr,
4796 PerlIOBase_setlinebuf,
4797 PerlIOMmap_get_base,
4801 PerlIOBuf_set_ptrcnt,
4804 #endif /* HAS_MMAP */
4807 Perl_PerlIO_stdin(pTHX)
4811 PerlIO_stdstreams(aTHX);
4813 return &PL_perlio[1];
4817 Perl_PerlIO_stdout(pTHX)
4821 PerlIO_stdstreams(aTHX);
4823 return &PL_perlio[2];
4827 Perl_PerlIO_stderr(pTHX)
4831 PerlIO_stdstreams(aTHX);
4833 return &PL_perlio[3];
4836 /*--------------------------------------------------------------------------------------*/
4839 PerlIO_getname(PerlIO *f, char *buf)
4844 bool exported = FALSE;
4845 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4847 stdio = PerlIO_exportFILE(f,0);
4851 name = fgetname(stdio, buf);
4852 if (exported) PerlIO_releaseFILE(f,stdio);
4857 PERL_UNUSED_ARG(buf);
4858 Perl_croak(aTHX_ "Don't know how to get file name");
4864 /*--------------------------------------------------------------------------------------*/
4866 * Functions which can be called on any kind of PerlIO implemented in
4870 #undef PerlIO_fdopen
4872 PerlIO_fdopen(int fd, const char *mode)
4875 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4880 PerlIO_open(const char *path, const char *mode)
4883 SV *name = sv_2mortal(newSVpv(path, 0));
4884 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4887 #undef Perlio_reopen
4889 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4892 SV *name = sv_2mortal(newSVpv(path,0));
4893 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4898 PerlIO_getc(PerlIO *f)
4902 if ( 1 == PerlIO_read(f, buf, 1) ) {
4903 return (unsigned char) buf[0];
4908 #undef PerlIO_ungetc
4910 PerlIO_ungetc(PerlIO *f, int ch)
4915 if (PerlIO_unread(f, &buf, 1) == 1)
4923 PerlIO_putc(PerlIO *f, int ch)
4927 return PerlIO_write(f, &buf, 1);
4932 PerlIO_puts(PerlIO *f, const char *s)
4935 return PerlIO_write(f, s, strlen(s));
4938 #undef PerlIO_rewind
4940 PerlIO_rewind(PerlIO *f)
4943 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4947 #undef PerlIO_vprintf
4949 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4952 SV * const sv = newSVpvs("");
4958 Perl_va_copy(ap, apc);
4959 sv_vcatpvf(sv, fmt, &apc);
4961 sv_vcatpvf(sv, fmt, &ap);
4963 s = SvPV_const(sv, len);
4964 wrote = PerlIO_write(f, s, len);
4969 #undef PerlIO_printf
4971 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4976 result = PerlIO_vprintf(f, fmt, ap);
4981 #undef PerlIO_stdoutf
4983 PerlIO_stdoutf(const char *fmt, ...)
4989 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4994 #undef PerlIO_tmpfile
4996 PerlIO_tmpfile(void)
5001 const int fd = win32_tmpfd();
5003 f = PerlIO_fdopen(fd, "w+b");
5005 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5006 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5008 * I have no idea how portable mkstemp() is ... NI-S
5010 const int fd = mkstemp(SvPVX(sv));
5012 f = PerlIO_fdopen(fd, "w+");
5014 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5015 PerlLIO_unlink(SvPVX_const(sv));
5018 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5019 FILE * const stdio = PerlSIO_tmpfile();
5022 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5023 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5025 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5031 # endif /* else HAS_MKSTEMP */
5032 #endif /* else WIN32 */
5039 #endif /* USE_SFIO */
5040 #endif /* PERLIO_IS_STDIO */
5042 /*======================================================================================*/
5044 * Now some functions in terms of above which may be needed even if we are
5045 * not in true PerlIO mode
5049 #undef PerlIO_setpos
5051 PerlIO_setpos(PerlIO *f, SV *pos)
5056 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5057 if (f && len == sizeof(Off_t))
5058 return PerlIO_seek(f, *posn, SEEK_SET);
5060 SETERRNO(EINVAL, SS_IVCHAN);
5064 #undef PerlIO_setpos
5066 PerlIO_setpos(PerlIO *f, SV *pos)
5071 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5072 if (f && len == sizeof(Fpos_t)) {
5073 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5074 return fsetpos64(f, fpos);
5076 return fsetpos(f, fpos);
5080 SETERRNO(EINVAL, SS_IVCHAN);
5086 #undef PerlIO_getpos
5088 PerlIO_getpos(PerlIO *f, SV *pos)
5091 Off_t posn = PerlIO_tell(f);
5092 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5093 return (posn == (Off_t) - 1) ? -1 : 0;
5096 #undef PerlIO_getpos
5098 PerlIO_getpos(PerlIO *f, SV *pos)
5103 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5104 code = fgetpos64(f, &fpos);
5106 code = fgetpos(f, &fpos);
5108 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5113 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5116 vprintf(char *pat, char *args)
5118 _doprnt(pat, args, stdout);
5119 return 0; /* wrong, but perl doesn't use the return
5124 vfprintf(FILE *fd, char *pat, char *args)
5126 _doprnt(pat, args, fd);
5127 return 0; /* wrong, but perl doesn't use the return
5133 #ifndef PerlIO_vsprintf
5135 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5138 const int val = vsprintf(s, fmt, ap);
5140 if (strlen(s) >= (STRLEN) n) {
5142 (void) PerlIO_puts(Perl_error_log,
5143 "panic: sprintf overflow - memory corrupted!\n");
5151 #ifndef PerlIO_sprintf
5153 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5158 result = PerlIO_vsprintf(s, n, fmt, ap);
5166 * c-indentation-style: bsd
5168 * indent-tabs-mode: t
5171 * ex: set ts=8 sts=4 sw=4 noet: