2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
9 * at the dispatch tables, even when we do not need it for other reasons.
10 * Invent a dSYS macro to abstract this out
12 #ifdef PERL_IMPLICIT_SYS
25 #define PERLIO_NOT_STDIO 0
26 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 * This file provides those parts of PerlIO abstraction
33 * which are not #defined in perlio.h.
34 * Which these are depends on various Configure #ifdef's
38 #define PERL_IN_PERLIO_C
43 #undef PerlMemShared_calloc
44 #define PerlMemShared_calloc(x,y) calloc(x,y)
45 #undef PerlMemShared_free
46 #define PerlMemShared_free(x) free(x)
49 perlsio_binmode(FILE *fp, int iotype, int mode)
52 * This used to be contents of do_binmode in doio.c
55 # if defined(atarist) || defined(__MINT__)
58 ((FILE *) fp)->_flag |= _IOBIN;
60 ((FILE *) fp)->_flag &= ~_IOBIN;
67 if (PerlLIO_setmode(fp, mode) != -1) {
69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
71 # if defined(WIN32) && defined(__BORLANDC__)
73 * The translation mode of the stream is maintained independent of
74 * the translation mode of the fd in the Borland RTL (heavy
75 * digging through their runtime sources reveal). User has to set
76 * the mode explicitly for the stream (though they don't document
77 * this anywhere). GSAR 97-5-24
91 # if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
102 #ifndef PERLIO_LAYERS
104 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
106 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
109 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
117 PerlIO_destruct(pTHX)
122 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
127 return perlsio_binmode(fp, iotype, mode);
132 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
136 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
137 int imode, int perm, PerlIO *old, int narg, SV **args)
140 if (*args == &PL_sv_undef)
141 return PerlIO_tmpfile();
143 char *name = SvPV_nolen(*args);
145 fd = PerlLIO_open3(name, imode, perm);
147 return PerlIO_fdopen(fd, (char *) mode + 1);
150 return PerlIO_reopen(name, mode, old);
153 return PerlIO_open(name, mode);
158 return PerlIO_fdopen(fd, (char *) mode);
163 XS(XS_PerlIO__Layer__find)
167 Perl_croak(aTHX_ "Usage class->find(name[,load])");
169 char *name = SvPV_nolen(ST(1));
170 ST(0) = (strEQ(name, "crlf")
171 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
178 Perl_boot_core_PerlIO(pTHX)
180 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
186 #ifdef PERLIO_IS_STDIO
192 * Does nothing (yet) except force this file to be included in perl
193 * binary. That allows this file to force inclusion of other functions
194 * that may be required by loadable extensions e.g. for
195 * FileHandle::tmpfile
199 #undef PerlIO_tmpfile
206 #else /* PERLIO_IS_STDIO */
214 * This section is just to make sure these functions get pulled in from
218 #undef PerlIO_tmpfile
229 * Force this file to be included in perl binary. Which allows this
230 * file to force inclusion of other functions that may be required by
231 * loadable extensions e.g. for FileHandle::tmpfile
235 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
236 * results in a lot of lseek()s to regular files and lot of small
239 sfset(sfstdout, SF_SHARE, 0);
243 PerlIO_importFILE(FILE *stdio, int fl)
245 int fd = fileno(stdio);
246 PerlIO *r = PerlIO_fdopen(fd, "r+");
251 PerlIO_findFILE(PerlIO *pio)
253 int fd = PerlIO_fileno(pio);
254 FILE *f = fdopen(fd, "r+");
256 if (!f && errno == EINVAL)
258 if (!f && errno == EINVAL)
265 /*======================================================================================*/
267 * Implement all the PerlIO interface ourselves.
273 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
280 #include <sys/mman.h>
284 void PerlIO_debug(const char *fmt, ...)
285 __attribute__ ((format(__printf__, 1, 2)));
288 PerlIO_debug(const char *fmt, ...)
295 char *s = PerlEnv_getenv("PERLIO_DEBUG");
297 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
304 /* Use fixed buffer as sv_catpvf etc. needs SVs */
308 s = CopFILE(PL_curcop);
311 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
312 len = strlen(buffer);
313 vsprintf(buffer+len, fmt, ap);
314 PerlLIO_write(dbg, buffer, strlen(buffer));
316 SV *sv = newSVpvn("", 0);
319 s = CopFILE(PL_curcop);
322 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
323 (IV) CopLINE(PL_curcop));
324 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
327 PerlLIO_write(dbg, s, len);
334 /*--------------------------------------------------------------------------------------*/
337 * Inner level routines
341 * Table of pointers to the PerlIO structs (malloc'ed)
343 PerlIO *_perlio = NULL;
344 #define PERLIO_TABLE_SIZE 64
349 PerlIO_allocate(pTHX)
352 * Find a free slot in the table, allocating new table as necessary
357 while ((f = *last)) {
359 last = (PerlIO **) (f);
360 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
366 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
375 PerlIO_cleantable(pTHX_ PerlIO **tablep)
377 PerlIO *table = *tablep;
380 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
381 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
382 PerlIO *f = table + i;
387 PerlMemShared_free(table);
392 PerlIO_list_t *PerlIO_known_layers;
393 PerlIO_list_t *PerlIO_def_layerlist;
396 PerlIO_list_alloc(void)
399 Newz('L', list, 1, PerlIO_list_t);
405 PerlIO_list_free(PerlIO_list_t *list)
408 if (--list->refcnt == 0) {
412 for (i = 0; i < list->cur; i++) {
413 if (list->array[i].arg)
414 SvREFCNT_dec(list->array[i].arg);
416 Safefree(list->array);
424 PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
428 if (list->cur >= list->len) {
431 Renew(list->array, list->len, PerlIO_pair_t);
433 New('l', list->array, list->len, PerlIO_pair_t);
435 p = &(list->array[list->cur++]);
437 if ((p->arg = arg)) {
444 PerlIO_cleanup_layers(pTHX_ void *data)
447 PerlIO_known_layers = Nullhv;
448 PerlIO_def_layerlist = Nullav;
456 PerlIO_cleantable(aTHX_ & _perlio);
460 PerlIO_destruct(pTHX)
462 PerlIO **table = &_perlio;
464 while ((f = *table)) {
466 table = (PerlIO **) (f++);
467 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
471 if (l->tab->kind & PERLIO_K_DESTRUCT) {
472 PerlIO_debug("Destruct popping %s\n", l->tab->name);
486 PerlIO_pop(pTHX_ PerlIO *f)
490 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
491 if (l->tab->Popped) {
493 * If popped returns non-zero do not free its layer structure
494 * it has either done so itself, or it is shared and still in
497 if ((*l->tab->Popped) (f) != 0)
501 PerlMemShared_free(l);
505 /*--------------------------------------------------------------------------------------*/
507 * XS Interface for perl code
511 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
514 if ((SSize_t) len <= 0)
516 for (i = 0; i < PerlIO_known_layers->cur; i++) {
517 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
518 if (memEQ(f->name, name, len)) {
519 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
523 if (load && PL_subname && PerlIO_def_layerlist
524 && PerlIO_def_layerlist->cur >= 2) {
525 SV *pkgsv = newSVpvn("PerlIO", 6);
526 SV *layer = newSVpvn(name, len);
529 * The two SVs are magically freed by load_module
531 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
533 return PerlIO_find_layer(aTHX_ name, len, 0);
535 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
539 #ifdef USE_ATTRIBUTES_FOR_PERLIO
542 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
545 IO *io = GvIOn((GV *) SvRV(sv));
546 PerlIO *ifp = IoIFP(io);
547 PerlIO *ofp = IoOFP(io);
548 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
554 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
557 IO *io = GvIOn((GV *) SvRV(sv));
558 PerlIO *ifp = IoIFP(io);
559 PerlIO *ofp = IoOFP(io);
560 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
566 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
568 Perl_warn(aTHX_ "clear %" SVf, sv);
573 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
575 Perl_warn(aTHX_ "free %" SVf, sv);
579 MGVTBL perlio_vtab = {
587 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
590 SV *sv = SvRV(ST(1));
595 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
597 mg = mg_find(sv, PERL_MAGIC_ext);
598 mg->mg_virtual = &perlio_vtab;
600 Perl_warn(aTHX_ "attrib %" SVf, sv);
601 for (i = 2; i < items; i++) {
603 const char *name = SvPV(ST(i), len);
604 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
606 av_push(av, SvREFCNT_inc(layer));
617 #endif /* USE_ATTIBUTES_FOR_PERLIO */
620 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
622 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
623 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
627 XS(XS_PerlIO__Layer__find)
631 Perl_croak(aTHX_ "Usage class->find(name[,load])");
634 char *name = SvPV(ST(1), len);
635 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
636 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
638 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
645 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
647 if (!PerlIO_known_layers)
648 PerlIO_known_layers = PerlIO_list_alloc();
649 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
650 PerlIO_debug("define %s %p\n", tab->name, tab);
654 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
657 const char *s = names;
659 while (isSPACE(*s) || *s == ':')
664 const char *as = Nullch;
666 if (!isIDFIRST(*s)) {
668 * Message is consistent with how attribute lists are
669 * passed. Even though this means "foo : : bar" is
670 * seen as an invalid separator character.
672 char q = ((*s == '\'') ? '"' : '\'');
674 "perlio: invalid separator character %c%c%c in layer specification list",
680 } while (isALNUM(*e));
696 * It's a nul terminated string, not allowed
697 * to \ the terminating null. Anything other
698 * character is passed over.
709 "perlio: argument list not closed for layer \"%.*s\"",
721 PerlIO_funcs *layer =
722 PerlIO_find_layer(aTHX_ s, llen, 1);
724 PerlIO_list_push(av, layer,
730 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
743 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
745 PerlIO_funcs *tab = &PerlIO_perlio;
746 if (O_BINARY != O_TEXT) {
750 if (PerlIO_stdio.Set_ptrcnt) {
754 PerlIO_debug("Pushing %s\n", tab->name);
755 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
760 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
762 return av->array[n].arg;
766 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
768 if (n >= 0 && n < av->cur) {
769 PerlIO_debug("Layer %" IVdf " is %s\n", n,
770 av->array[n].funcs->name);
771 return av->array[n].funcs;
774 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
779 PerlIO_default_layers(pTHX)
781 if (!PerlIO_def_layerlist) {
782 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
783 PerlIO_funcs *osLayer = &PerlIO_unix;
784 PerlIO_def_layerlist = PerlIO_list_alloc();
785 PerlIO_define_layer(aTHX_ & PerlIO_unix);
786 #if defined(WIN32) && !defined(UNDER_CE)
787 PerlIO_define_layer(aTHX_ & PerlIO_win32);
789 osLayer = &PerlIO_win32;
792 PerlIO_define_layer(aTHX_ & PerlIO_raw);
793 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
794 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
795 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
797 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
799 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
800 PerlIO_define_layer(aTHX_ & PerlIO_byte);
801 PerlIO_list_push(PerlIO_def_layerlist,
802 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
805 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
808 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
811 if (PerlIO_def_layerlist->cur < 2) {
812 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
814 return PerlIO_def_layerlist;
818 Perl_boot_core_PerlIO(pTHX)
820 #ifdef USE_ATTRIBUTES_FOR_PERLIO
821 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
824 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
828 PerlIO_default_layer(pTHX_ I32 n)
830 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
833 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
836 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
837 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
840 PerlIO_stdstreams(pTHX)
843 PerlIO_allocate(aTHX);
844 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
845 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
846 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
851 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
854 l = PerlMemShared_calloc(tab->size, sizeof(char));
856 Zero(l, tab->size, char);
860 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
861 (mode) ? mode : "(Null)", arg);
862 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
871 PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
884 PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
887 * Remove the dummy layer
892 * Pop back to bottom layer
896 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
897 if (*PerlIONext(f)) {
902 * Nothing bellow - push unix on top then remove it
904 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
905 PerlIO_pop(aTHX_ PerlIONext(f));
910 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
917 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
918 PerlIO_list_t *layers, IV n)
920 IV max = layers->cur;
923 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
925 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
936 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
940 PerlIO_list_t *layers = PerlIO_list_alloc();
941 code = PerlIO_parse_layers(aTHX_ layers, names);
943 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
945 PerlIO_list_free(layers);
951 /*--------------------------------------------------------------------------------------*/
953 * Given the abstraction above the public API functions
957 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
959 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
960 f, PerlIOBase(f)->tab->name, iotype, mode,
961 (names) ? names : "(Null)");
963 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
966 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
967 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
970 top = PerlIONext(top);
974 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
979 PerlIO__close(PerlIO *f)
982 return (*PerlIOBase(f)->tab->Close) (f);
984 SETERRNO(EBADF, SS$_IVCHAN);
989 #undef PerlIO_fdupopen
991 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
994 PerlIO_funcs *tab = PerlIOBase(f)->tab;
996 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
997 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
1001 SETERRNO(EBADF, SS$_IVCHAN);
1008 PerlIO_close(PerlIO *f)
1013 code = (*PerlIOBase(f)->tab->Close) (f);
1015 PerlIO_pop(aTHX_ f);
1021 #undef PerlIO_fileno
1023 PerlIO_fileno(PerlIO *f)
1026 return (*PerlIOBase(f)->tab->Fileno) (f);
1028 SETERRNO(EBADF, SS$_IVCHAN);
1034 PerlIO_context_layers(pTHX_ const char *mode)
1036 const char *type = NULL;
1038 * Need to supply default layer info from open.pm
1041 SV *layers = PL_curcop->cop_io;
1044 type = SvPV(layers, len);
1045 if (type && mode[0] != 'r') {
1047 * Skip to write part
1049 const char *s = strchr(type, 0);
1050 if (s && (s - type) < len) {
1059 static PerlIO_funcs *
1060 PerlIO_layer_from_ref(pTHX_ SV *sv)
1063 * For any scalar type load the handler which is bundled with perl
1065 if (SvTYPE(sv) < SVt_PVAV)
1066 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1069 * For other types allow if layer is known but don't try and load it
1071 switch (SvTYPE(sv)) {
1073 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1075 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1077 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1079 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1085 PerlIO_resolve_layers(pTHX_ const char *layers,
1086 const char *mode, int narg, SV **args)
1088 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1091 PerlIO_stdstreams(aTHX);
1095 * If it is a reference but not an object see if we have a handler
1098 if (SvROK(arg) && !sv_isobject(arg)) {
1099 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1101 def = PerlIO_list_alloc();
1102 PerlIO_list_push(def, handler, &PL_sv_undef);
1106 * Don't fail if handler cannot be found :Via(...) etc. may do
1107 * something sensible else we will just stringfy and open
1113 layers = PerlIO_context_layers(aTHX_ mode);
1114 if (layers && *layers) {
1118 av = PerlIO_list_alloc();
1119 for (i = 0; i < def->cur; i++) {
1120 PerlIO_list_push(av, def->array[i].funcs,
1127 PerlIO_parse_layers(aTHX_ av, layers);
1138 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1139 int imode, int perm, PerlIO *f, int narg, SV **args)
1141 if (!f && narg == 1 && *args == &PL_sv_undef) {
1142 if ((f = PerlIO_tmpfile())) {
1144 layers = PerlIO_context_layers(aTHX_ mode);
1145 if (layers && *layers)
1146 PerlIO_apply_layers(aTHX_ f, mode, layers);
1150 PerlIO_list_t *layera = NULL;
1152 PerlIO_funcs *tab = NULL;
1155 * This is "reopen" - it is not tested as perl does not use it
1159 layera = PerlIO_list_alloc();
1162 (l->tab->Getarg) ? (*l->tab->
1163 Getarg) (&l) : &PL_sv_undef;
1164 PerlIO_list_push(layera, l->tab, arg);
1165 l = *PerlIONext(&l);
1169 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1172 * Start at "top" of layer stack
1174 n = layera->cur - 1;
1176 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1185 * Found that layer 'n' can do opens - call it
1187 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1188 tab->name, layers, mode, fd, imode, perm, f, narg,
1190 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1193 if (n + 1 < layera->cur) {
1195 * More layers above the one that we used to open -
1198 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1205 PerlIO_list_free(layera);
1211 #undef PerlIO_fdopen
1213 PerlIO_fdopen(int fd, const char *mode)
1216 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
1221 PerlIO_open(const char *path, const char *mode)
1224 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1225 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
1228 #undef PerlIO_reopen
1230 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
1233 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1234 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
1239 PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
1242 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1244 SETERRNO(EBADF, SS$_IVCHAN);
1249 #undef PerlIO_unread
1251 PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
1254 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1256 SETERRNO(EBADF, SS$_IVCHAN);
1263 PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
1266 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1268 SETERRNO(EBADF, SS$_IVCHAN);
1275 PerlIO_seek(PerlIO *f, Off_t offset, int whence)
1278 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1280 SETERRNO(EBADF, SS$_IVCHAN);
1287 PerlIO_tell(PerlIO *f)
1290 return (*PerlIOBase(f)->tab->Tell) (f);
1292 SETERRNO(EBADF, SS$_IVCHAN);
1299 PerlIO_flush(PerlIO *f)
1303 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1304 if (tab && tab->Flush) {
1305 return (*tab->Flush) (f);
1308 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1309 SETERRNO(EBADF, SS$_IVCHAN);
1314 PerlIO_debug("Cannot flush f=%p\n", f);
1315 SETERRNO(EBADF, SS$_IVCHAN);
1321 * Is it good API design to do flush-all on NULL, a potentially
1322 * errorneous input? Maybe some magical value (PerlIO*
1323 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1324 * things on fflush(NULL), but should we be bound by their design
1327 PerlIO **table = &_perlio;
1329 while ((f = *table)) {
1331 table = (PerlIO **) (f++);
1332 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1333 if (*f && PerlIO_flush(f) != 0)
1343 PerlIOBase_flush_linebuf()
1345 PerlIO **table = &_perlio;
1347 while ((f = *table)) {
1349 table = (PerlIO **) (f++);
1350 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1353 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1354 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1363 PerlIO_fill(PerlIO *f)
1366 return (*PerlIOBase(f)->tab->Fill) (f);
1368 SETERRNO(EBADF, SS$_IVCHAN);
1373 #undef PerlIO_isutf8
1375 PerlIO_isutf8(PerlIO *f)
1378 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1380 SETERRNO(EBADF, SS$_IVCHAN);
1387 PerlIO_eof(PerlIO *f)
1390 return (*PerlIOBase(f)->tab->Eof) (f);
1392 SETERRNO(EBADF, SS$_IVCHAN);
1399 PerlIO_error(PerlIO *f)
1402 return (*PerlIOBase(f)->tab->Error) (f);
1404 SETERRNO(EBADF, SS$_IVCHAN);
1409 #undef PerlIO_clearerr
1411 PerlIO_clearerr(PerlIO *f)
1414 (*PerlIOBase(f)->tab->Clearerr) (f);
1416 SETERRNO(EBADF, SS$_IVCHAN);
1419 #undef PerlIO_setlinebuf
1421 PerlIO_setlinebuf(PerlIO *f)
1424 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1426 SETERRNO(EBADF, SS$_IVCHAN);
1429 #undef PerlIO_has_base
1431 PerlIO_has_base(PerlIO *f)
1434 return (PerlIOBase(f)->tab->Get_base != NULL);
1439 #undef PerlIO_fast_gets
1441 PerlIO_fast_gets(PerlIO *f)
1443 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1444 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1445 return (tab->Set_ptrcnt != NULL);
1450 #undef PerlIO_has_cntptr
1452 PerlIO_has_cntptr(PerlIO *f)
1455 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1456 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1461 #undef PerlIO_canset_cnt
1463 PerlIO_canset_cnt(PerlIO *f)
1466 PerlIOl *l = PerlIOBase(f);
1467 return (l->tab->Set_ptrcnt != NULL);
1472 #undef PerlIO_get_base
1474 PerlIO_get_base(PerlIO *f)
1477 return (*PerlIOBase(f)->tab->Get_base) (f);
1481 #undef PerlIO_get_bufsiz
1483 PerlIO_get_bufsiz(PerlIO *f)
1486 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1490 #undef PerlIO_get_ptr
1492 PerlIO_get_ptr(PerlIO *f)
1494 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1495 if (tab->Get_ptr == NULL)
1497 return (*tab->Get_ptr) (f);
1500 #undef PerlIO_get_cnt
1502 PerlIO_get_cnt(PerlIO *f)
1504 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1505 if (tab->Get_cnt == NULL)
1507 return (*tab->Get_cnt) (f);
1510 #undef PerlIO_set_cnt
1512 PerlIO_set_cnt(PerlIO *f, int cnt)
1514 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
1517 #undef PerlIO_set_ptrcnt
1519 PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
1521 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1522 if (tab->Set_ptrcnt == NULL) {
1524 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1526 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
1529 /*--------------------------------------------------------------------------------------*/
1531 * utf8 and raw dummy layers
1535 PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
1537 if (PerlIONext(f)) {
1539 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1540 PerlIO_pop(aTHX_ f);
1541 if (tab->kind & PERLIO_K_UTF8)
1542 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1544 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1550 PerlIO_funcs PerlIO_utf8 = {
1553 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1571 NULL, /* get_base */
1572 NULL, /* get_bufsiz */
1575 NULL, /* set_ptrcnt */
1578 PerlIO_funcs PerlIO_byte = {
1599 NULL, /* get_base */
1600 NULL, /* get_bufsiz */
1603 NULL, /* set_ptrcnt */
1607 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1608 IV n, const char *mode, int fd, int imode, int perm,
1609 PerlIO *old, int narg, SV **args)
1611 PerlIO_funcs *tab = PerlIO_default_btm();
1612 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1616 PerlIO_funcs PerlIO_raw = {
1637 NULL, /* get_base */
1638 NULL, /* get_bufsiz */
1641 NULL, /* set_ptrcnt */
1643 /*--------------------------------------------------------------------------------------*/
1644 /*--------------------------------------------------------------------------------------*/
1646 * "Methods" of the "base class"
1650 PerlIOBase_fileno(PerlIO *f)
1652 return PerlIO_fileno(PerlIONext(f));
1656 PerlIO_modestr(PerlIO *f, char *buf)
1659 IV flags = PerlIOBase(f)->flags;
1660 if (flags & PERLIO_F_APPEND) {
1662 if (flags & PERLIO_F_CANREAD) {
1666 else if (flags & PERLIO_F_CANREAD) {
1668 if (flags & PERLIO_F_CANWRITE)
1671 else if (flags & PERLIO_F_CANWRITE) {
1673 if (flags & PERLIO_F_CANREAD) {
1677 #if O_TEXT != O_BINARY
1678 if (!(flags & PERLIO_F_CRLF))
1686 PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
1688 PerlIOl *l = PerlIOBase(f);
1690 const char *omode = mode;
1693 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1694 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1695 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1696 if (tab->Set_ptrcnt != NULL)
1697 l->flags |= PERLIO_F_FASTGETS;
1699 if (*mode == '#' || *mode == 'I')
1703 l->flags |= PERLIO_F_CANREAD;
1706 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1709 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1712 SETERRNO(EINVAL, LIB$_INVARG);
1718 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1721 l->flags &= ~PERLIO_F_CRLF;
1724 l->flags |= PERLIO_F_CRLF;
1727 SETERRNO(EINVAL, LIB$_INVARG);
1734 l->flags |= l->next->flags &
1735 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1740 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1741 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1742 l->flags, PerlIO_modestr(f, temp));
1748 PerlIOBase_popped(PerlIO *f)
1754 PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1758 * Save the position as current head considers it
1760 Off_t old = PerlIO_tell(f);
1762 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1763 PerlIOSelf(f, PerlIOBuf)->posn = old;
1764 done = PerlIOBuf_unread(f, vbuf, count);
1769 PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1771 STDCHAR *buf = (STDCHAR *) vbuf;
1773 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1776 SSize_t avail = PerlIO_get_cnt(f);
1779 take = (count < avail) ? count : avail;
1781 STDCHAR *ptr = PerlIO_get_ptr(f);
1782 Copy(ptr, buf, take, STDCHAR);
1783 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1787 if (count > 0 && avail <= 0) {
1788 if (PerlIO_fill(f) != 0)
1792 return (buf - (STDCHAR *) vbuf);
1798 PerlIOBase_noop_ok(PerlIO *f)
1804 PerlIOBase_noop_fail(PerlIO *f)
1810 PerlIOBase_close(PerlIO *f)
1813 PerlIO *n = PerlIONext(f);
1814 if (PerlIO_flush(f) != 0)
1816 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1818 PerlIOBase(f)->flags &=
1819 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1824 PerlIOBase_eof(PerlIO *f)
1827 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1833 PerlIOBase_error(PerlIO *f)
1836 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1842 PerlIOBase_clearerr(PerlIO *f)
1845 PerlIO *n = PerlIONext(f);
1846 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1853 PerlIOBase_setlinebuf(PerlIO *f)
1856 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1860 /*--------------------------------------------------------------------------------------*/
1862 * Bottom-most level for UNIX-like case
1866 struct _PerlIO base; /* The generic part */
1867 int fd; /* UNIX like file descriptor */
1868 int oflags; /* open/fcntl flags */
1872 PerlIOUnix_oflags(const char *mode)
1875 if (*mode == 'I' || *mode == '#')
1880 if (*++mode == '+') {
1887 oflags = O_CREAT | O_TRUNC;
1888 if (*++mode == '+') {
1897 oflags = O_CREAT | O_APPEND;
1898 if (*++mode == '+') {
1911 else if (*mode == 't') {
1913 oflags &= ~O_BINARY;
1917 * Always open in binary mode
1920 if (*mode || oflags == -1) {
1921 SETERRNO(EINVAL, LIB$_INVARG);
1928 PerlIOUnix_fileno(PerlIO *f)
1930 return PerlIOSelf(f, PerlIOUnix)->fd;
1934 PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
1936 IV code = PerlIOBase_pushed(f, mode, arg);
1937 if (*PerlIONext(f)) {
1938 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1939 s->fd = PerlIO_fileno(PerlIONext(f));
1941 * XXX could (or should) we retrieve the oflags from the open file
1942 * handle rather than believing the "mode" we are passed in? XXX
1943 * Should the value on NULL mode be 0 or -1?
1945 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1947 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1952 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1953 IV n, const char *mode, int fd, int imode,
1954 int perm, PerlIO *f, int narg, SV **args)
1957 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1958 (*PerlIOBase(f)->tab->Close) (f);
1961 char *path = SvPV_nolen(*args);
1965 imode = PerlIOUnix_oflags(mode);
1969 fd = PerlLIO_open3(path, imode, perm);
1977 f = PerlIO_allocate(aTHX);
1978 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1982 s = PerlIOSelf(f, PerlIOUnix);
1985 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1991 * FIXME: pop layers ???
1999 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2005 return sv_dup(arg, param);
2008 return newSVsv(arg);
2011 return newSVsv(arg);
2016 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2018 PerlIO *nexto = PerlIONext(o);
2019 PerlIO_debug("PerlIOBase_dup f=%p o=%p param=%p\n",f,o,param);
2021 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2022 f = (*tab->Dup)(aTHX_ f, nexto, param);
2025 PerlIO_funcs *self = PerlIOBase(o)->tab;
2029 arg = (*self->Getarg)(o);
2031 arg = PerlIO_sv_dup(aTHX_ arg, param);
2034 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2043 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2045 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2046 int fd = PerlLIO_dup(os->fd);
2048 f = PerlIOBase_dup(aTHX_ f, o, param);
2050 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2051 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2064 PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2067 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2068 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2071 SSize_t len = PerlLIO_read(fd, vbuf, count);
2072 if (len >= 0 || errno != EINTR) {
2074 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2075 else if (len == 0 && count != 0)
2076 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2084 PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2087 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2089 SSize_t len = PerlLIO_write(fd, vbuf, count);
2090 if (len >= 0 || errno != EINTR) {
2092 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2100 PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2104 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2105 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2106 return (new == (Off_t) - 1) ? -1 : 0;
2110 PerlIOUnix_tell(PerlIO *f)
2113 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2118 PerlIOUnix_close(PerlIO *f)
2121 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2123 while (PerlLIO_close(fd) != 0) {
2124 if (errno != EINTR) {
2131 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2136 PerlIO_funcs PerlIO_unix = {
2152 PerlIOBase_noop_ok, /* flush */
2153 PerlIOBase_noop_fail, /* fill */
2156 PerlIOBase_clearerr,
2157 PerlIOBase_setlinebuf,
2158 NULL, /* get_base */
2159 NULL, /* get_bufsiz */
2162 NULL, /* set_ptrcnt */
2165 /*--------------------------------------------------------------------------------------*/
2171 struct _PerlIO base;
2172 FILE *stdio; /* The stream */
2176 PerlIOStdio_fileno(PerlIO *f)
2179 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2183 PerlIOStdio_mode(const char *mode, char *tmode)
2189 if (O_BINARY != O_TEXT) {
2197 * This isn't used yet ...
2200 PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
2202 if (*PerlIONext(f)) {
2204 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2207 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2208 PerlIOStdio_mode(mode, tmode));
2214 return PerlIOBase_pushed(f, mode, arg);
2217 #undef PerlIO_importFILE
2219 PerlIO_importFILE(FILE *stdio, int fl)
2225 PerlIOSelf(PerlIO_push
2226 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2227 "r+", Nullsv), PerlIOStdio);
2234 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2235 IV n, const char *mode, int fd, int imode,
2236 int perm, PerlIO *f, int narg, SV **args)
2240 char *path = SvPV_nolen(*args);
2241 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2243 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2252 char *path = SvPV_nolen(*args);
2255 fd = PerlLIO_open3(path, imode, perm);
2258 FILE *stdio = PerlSIO_fopen(path, mode);
2261 PerlIOSelf(PerlIO_push
2262 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2263 (mode = PerlIOStdio_mode(mode, tmode)),
2281 stdio = PerlSIO_stdin;
2284 stdio = PerlSIO_stdout;
2287 stdio = PerlSIO_stderr;
2292 stdio = PerlSIO_fdopen(fd, mode =
2293 PerlIOStdio_mode(mode, tmode));
2297 PerlIOSelf(PerlIO_push
2298 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2299 mode, PerlIOArg), PerlIOStdio);
2309 PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2312 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2315 STDCHAR *buf = (STDCHAR *) vbuf;
2317 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2318 * stdio does not do that for fread()
2320 int ch = PerlSIO_fgetc(s);
2327 got = PerlSIO_fread(vbuf, 1, count, s);
2332 PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2335 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2336 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2339 int ch = *buf-- & 0xff;
2340 if (PerlSIO_ungetc(ch, s) != ch)
2349 PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2352 return PerlSIO_fwrite(vbuf, 1, count,
2353 PerlIOSelf(f, PerlIOStdio)->stdio);
2357 PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2360 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2361 return PerlSIO_fseek(stdio, offset, whence);
2365 PerlIOStdio_tell(PerlIO *f)
2368 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2369 return PerlSIO_ftell(stdio);
2373 PerlIOStdio_close(PerlIO *f)
2376 #ifdef SOCKS5_VERSION_NAME
2378 Sock_size_t optlen = sizeof(int);
2380 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2382 #ifdef SOCKS5_VERSION_NAME
2384 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2386 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2388 PerlSIO_fclose(stdio)
2395 PerlIOStdio_flush(PerlIO *f)
2398 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2399 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2400 return PerlSIO_fflush(stdio);
2405 * FIXME: This discards ungetc() and pre-read stuff which is not
2406 * right if this is just a "sync" from a layer above Suspect right
2407 * design is to do _this_ but not have layer above flush this
2408 * layer read-to-read
2411 * Not writeable - sync by attempting a seek
2414 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2422 PerlIOStdio_fill(PerlIO *f)
2425 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2428 * fflush()ing read-only streams can cause trouble on some stdio-s
2430 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2431 if (PerlSIO_fflush(stdio) != 0)
2434 c = PerlSIO_fgetc(stdio);
2435 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2441 PerlIOStdio_eof(PerlIO *f)
2444 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2448 PerlIOStdio_error(PerlIO *f)
2451 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2455 PerlIOStdio_clearerr(PerlIO *f)
2458 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2462 PerlIOStdio_setlinebuf(PerlIO *f)
2465 #ifdef HAS_SETLINEBUF
2466 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2468 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2474 PerlIOStdio_get_base(PerlIO *f)
2477 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2478 return PerlSIO_get_base(stdio);
2482 PerlIOStdio_get_bufsiz(PerlIO *f)
2485 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2486 return PerlSIO_get_bufsiz(stdio);
2490 #ifdef USE_STDIO_PTR
2492 PerlIOStdio_get_ptr(PerlIO *f)
2495 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2496 return PerlSIO_get_ptr(stdio);
2500 PerlIOStdio_get_cnt(PerlIO *f)
2503 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2504 return PerlSIO_get_cnt(stdio);
2508 PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2510 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2513 #ifdef STDIO_PTR_LVALUE
2514 PerlSIO_set_ptr(stdio, ptr);
2515 #ifdef STDIO_PTR_LVAL_SETS_CNT
2516 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2518 assert(PerlSIO_get_cnt(stdio) == (cnt));
2521 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2523 * Setting ptr _does_ change cnt - we are done
2527 #else /* STDIO_PTR_LVALUE */
2529 #endif /* STDIO_PTR_LVALUE */
2532 * Now (or only) set cnt
2534 #ifdef STDIO_CNT_LVALUE
2535 PerlSIO_set_cnt(stdio, cnt);
2536 #else /* STDIO_CNT_LVALUE */
2537 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2538 PerlSIO_set_ptr(stdio,
2539 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2541 #else /* STDIO_PTR_LVAL_SETS_CNT */
2543 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2544 #endif /* STDIO_CNT_LVALUE */
2550 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2552 return PerlIOBase_dup(aTHX_ f, o, param);
2555 PerlIO_funcs PerlIO_stdio = {
2557 sizeof(PerlIOStdio),
2575 PerlIOStdio_clearerr,
2576 PerlIOStdio_setlinebuf,
2578 PerlIOStdio_get_base,
2579 PerlIOStdio_get_bufsiz,
2584 #ifdef USE_STDIO_PTR
2585 PerlIOStdio_get_ptr,
2586 PerlIOStdio_get_cnt,
2587 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2588 PerlIOStdio_set_ptrcnt
2589 #else /* STDIO_PTR_LVALUE */
2591 #endif /* STDIO_PTR_LVALUE */
2592 #else /* USE_STDIO_PTR */
2596 #endif /* USE_STDIO_PTR */
2599 #undef PerlIO_exportFILE
2601 PerlIO_exportFILE(PerlIO *f, int fl)
2605 stdio = fdopen(PerlIO_fileno(f), "r+");
2609 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2616 #undef PerlIO_findFILE
2618 PerlIO_findFILE(PerlIO *f)
2622 if (l->tab == &PerlIO_stdio) {
2623 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2626 l = *PerlIONext(&l);
2628 return PerlIO_exportFILE(f, 0);
2631 #undef PerlIO_releaseFILE
2633 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2637 /*--------------------------------------------------------------------------------------*/
2639 * perlio buffer layer
2643 PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
2646 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2647 int fd = PerlIO_fileno(f);
2649 if (fd >= 0 && PerlLIO_isatty(fd)) {
2650 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2652 posn = PerlIO_tell(PerlIONext(f));
2653 if (posn != (Off_t) - 1) {
2656 return PerlIOBase_pushed(f, mode, arg);
2660 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2661 IV n, const char *mode, int fd, int imode, int perm,
2662 PerlIO *f, int narg, SV **args)
2665 PerlIO *next = PerlIONext(f);
2667 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2669 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2672 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2678 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2686 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2689 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2690 fd = PerlIO_fileno(f);
2691 #if O_BINARY != O_TEXT
2693 * do something about failing setmode()? --jhi
2695 PerlLIO_setmode(fd, O_BINARY);
2697 if (init && fd == 2) {
2699 * Initial stderr is unbuffered
2701 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2709 * This "flush" is akin to sfio's sync in that it handles files in either
2710 * read or write state
2713 PerlIOBuf_flush(PerlIO *f)
2715 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2717 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2719 * write() the buffer
2721 STDCHAR *buf = b->buf;
2723 PerlIO *n = PerlIONext(f);
2724 while (p < b->ptr) {
2725 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2729 else if (count < 0 || PerlIO_error(n)) {
2730 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2735 b->posn += (p - buf);
2737 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2738 STDCHAR *buf = PerlIO_get_base(f);
2740 * Note position change
2742 b->posn += (b->ptr - buf);
2743 if (b->ptr < b->end) {
2745 * We did not consume all of it
2747 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2748 b->posn = PerlIO_tell(PerlIONext(f));
2752 b->ptr = b->end = b->buf;
2753 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2755 * FIXME: Is this right for read case ?
2757 if (PerlIO_flush(PerlIONext(f)) != 0)
2763 PerlIOBuf_fill(PerlIO *f)
2765 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2766 PerlIO *n = PerlIONext(f);
2769 * FIXME: doing the down-stream flush is a bad idea if it causes
2770 * pre-read data in stdio buffer to be discarded but this is too
2771 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2772 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2774 if (PerlIO_flush(f) != 0)
2776 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2777 PerlIOBase_flush_linebuf();
2780 PerlIO_get_base(f); /* allocate via vtable */
2782 b->ptr = b->end = b->buf;
2783 if (PerlIO_fast_gets(n)) {
2785 * Layer below is also buffered We do _NOT_ want to call its
2786 * ->Read() because that will loop till it gets what we asked for
2787 * which may hang on a pipe etc. Instead take anything it has to
2788 * hand, or ask it to fill _once_.
2790 avail = PerlIO_get_cnt(n);
2792 avail = PerlIO_fill(n);
2794 avail = PerlIO_get_cnt(n);
2796 if (!PerlIO_error(n) && PerlIO_eof(n))
2801 STDCHAR *ptr = PerlIO_get_ptr(n);
2802 SSize_t cnt = avail;
2803 if (avail > b->bufsiz)
2805 Copy(ptr, b->buf, avail, STDCHAR);
2806 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2810 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2814 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2816 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2819 b->end = b->buf + avail;
2820 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2825 PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
2827 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2831 return PerlIOBase_read(f, vbuf, count);
2837 PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
2839 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2840 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2843 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2848 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2850 * Buffer is already a read buffer, we can overwrite any chars
2851 * which have been read back to buffer start
2853 avail = (b->ptr - b->buf);
2857 * Buffer is idle, set it up so whole buffer is available for
2861 b->end = b->buf + avail;
2863 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2865 * Buffer extends _back_ from where we are now
2867 b->posn -= b->bufsiz;
2869 if (avail > (SSize_t) count) {
2871 * If we have space for more than count, just move count
2879 * In simple stdio-like ungetc() case chars will be already
2882 if (buf != b->ptr) {
2883 Copy(buf, b->ptr, avail, STDCHAR);
2887 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2894 PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
2896 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2897 const STDCHAR *buf = (const STDCHAR *) vbuf;
2901 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2904 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2905 if ((SSize_t) count < avail)
2907 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2908 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2923 Copy(buf, b->ptr, avail, STDCHAR);
2930 if (b->ptr >= (b->buf + b->bufsiz))
2933 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2939 PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2942 if ((code = PerlIO_flush(f)) == 0) {
2943 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2944 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2945 code = PerlIO_seek(PerlIONext(f), offset, whence);
2947 b->posn = PerlIO_tell(PerlIONext(f));
2954 PerlIOBuf_tell(PerlIO *f)
2956 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2958 * b->posn is file position where b->buf was read, or will be written
2960 Off_t posn = b->posn;
2963 * If buffer is valid adjust position by amount in buffer
2965 posn += (b->ptr - b->buf);
2971 PerlIOBuf_close(PerlIO *f)
2973 IV code = PerlIOBase_close(f);
2974 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2975 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2976 PerlMemShared_free(b->buf);
2979 b->ptr = b->end = b->buf;
2980 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2985 PerlIOBuf_get_ptr(PerlIO *f)
2987 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2994 PerlIOBuf_get_cnt(PerlIO *f)
2996 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2999 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3000 return (b->end - b->ptr);
3005 PerlIOBuf_get_base(PerlIO *f)
3007 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3011 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
3013 b->buf = (STDCHAR *) & b->oneword;
3014 b->bufsiz = sizeof(b->oneword);
3023 PerlIOBuf_bufsiz(PerlIO *f)
3025 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3028 return (b->end - b->buf);
3032 PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3038 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3040 assert(PerlIO_get_cnt(f) == cnt);
3041 assert(b->ptr >= b->buf);
3043 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3047 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3049 return PerlIOBase_dup(aTHX_ f, o, param);
3054 PerlIO_funcs PerlIO_perlio = {
3074 PerlIOBase_clearerr,
3075 PerlIOBase_setlinebuf,
3080 PerlIOBuf_set_ptrcnt,
3083 /*--------------------------------------------------------------------------------------*/
3085 * Temp layer to hold unread chars when cannot do it any other way
3089 PerlIOPending_fill(PerlIO *f)
3092 * Should never happen
3099 PerlIOPending_close(PerlIO *f)
3102 * A tad tricky - flush pops us, then we close new top
3105 return PerlIO_close(f);
3109 PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3112 * A tad tricky - flush pops us, then we seek new top
3115 return PerlIO_seek(f, offset, whence);
3120 PerlIOPending_flush(PerlIO *f)
3123 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3124 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3125 PerlMemShared_free(b->buf);
3128 PerlIO_pop(aTHX_ f);
3133 PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3139 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3144 PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
3146 IV code = PerlIOBase_pushed(f, mode, arg);
3147 PerlIOl *l = PerlIOBase(f);
3149 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3150 * etc. get muddled when it changes mid-string when we auto-pop.
3152 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3153 (PerlIOBase(PerlIONext(f))->
3154 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3159 PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3161 SSize_t avail = PerlIO_get_cnt(f);
3166 got = PerlIOBuf_read(f, vbuf, avail);
3167 if (got >= 0 && got < count) {
3169 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3170 if (more >= 0 || got == 0)
3176 PerlIO_funcs PerlIO_pending = {
3180 PerlIOPending_pushed,
3191 PerlIOPending_close,
3192 PerlIOPending_flush,
3196 PerlIOBase_clearerr,
3197 PerlIOBase_setlinebuf,
3202 PerlIOPending_set_ptrcnt,
3207 /*--------------------------------------------------------------------------------------*/
3209 * crlf - translation On read translate CR,LF to "\n" we do this by
3210 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3211 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3215 PerlIOBuf base; /* PerlIOBuf stuff */
3216 STDCHAR *nl; /* Position of crlf we "lied" about in the
3221 PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
3224 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3225 code = PerlIOBuf_pushed(f, mode, arg);
3227 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3228 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3229 PerlIOBase(f)->flags);
3236 PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3238 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3243 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3244 return PerlIOBuf_unread(f, vbuf, count);
3246 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3247 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3249 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3254 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3255 b->end = b->ptr = b->buf + b->bufsiz;
3256 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3257 b->posn -= b->bufsiz;
3259 while (count > 0 && b->ptr > b->buf) {
3262 if (b->ptr - 2 >= b->buf) {
3285 PerlIOCrlf_get_cnt(PerlIO *f)
3287 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3290 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3291 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3292 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3293 STDCHAR *nl = b->ptr;
3295 while (nl < b->end && *nl != 0xd)
3297 if (nl < b->end && *nl == 0xd) {
3299 if (nl + 1 < b->end) {
3306 * Not CR,LF but just CR
3314 * Blast - found CR as last char in buffer
3318 * They may not care, defer work as long as
3321 return (nl - b->ptr);
3325 b->ptr++; /* say we have read it as far as
3326 * flush() is concerned */
3327 b->buf++; /* Leave space an front of buffer */
3328 b->bufsiz--; /* Buffer is thus smaller */
3329 code = PerlIO_fill(f); /* Fetch some more */
3330 b->bufsiz++; /* Restore size for next time */
3331 b->buf--; /* Point at space */
3332 b->ptr = nl = b->buf; /* Which is what we hand
3334 b->posn--; /* Buffer starts here */
3335 *nl = 0xd; /* Fill in the CR */
3337 goto test; /* fill() call worked */
3339 * CR at EOF - just fall through
3345 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3351 PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3353 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3354 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3355 IV flags = PerlIOBase(f)->flags;
3363 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3370 * Test code - delete when it works ...
3377 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3384 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3385 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3392 * They have taken what we lied about
3400 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3404 PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3406 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3407 return PerlIOBuf_write(f, vbuf, count);
3409 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3410 const STDCHAR *buf = (const STDCHAR *) vbuf;
3411 const STDCHAR *ebuf = buf + count;
3414 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3416 while (buf < ebuf) {
3417 STDCHAR *eptr = b->buf + b->bufsiz;
3418 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3419 while (buf < ebuf && b->ptr < eptr) {
3421 if ((b->ptr + 2) > eptr) {
3429 *(b->ptr)++ = 0xd; /* CR */
3430 *(b->ptr)++ = 0xa; /* LF */
3432 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3442 if (b->ptr >= eptr) {
3448 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3450 return (buf - (STDCHAR *) vbuf);
3455 PerlIOCrlf_flush(PerlIO *f)
3457 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3462 return PerlIOBuf_flush(f);
3465 PerlIO_funcs PerlIO_crlf = {
3468 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3470 PerlIOBase_noop_ok, /* popped */
3475 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3477 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3478 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3486 PerlIOBase_clearerr,
3487 PerlIOBase_setlinebuf,
3492 PerlIOCrlf_set_ptrcnt,
3496 /*--------------------------------------------------------------------------------------*/
3498 * mmap as "buffer" layer
3502 PerlIOBuf base; /* PerlIOBuf stuff */
3503 Mmap_t mptr; /* Mapped address */
3504 Size_t len; /* mapped length */
3505 STDCHAR *bbuf; /* malloced buffer if map fails */
3508 static size_t page_size = 0;
3511 PerlIOMmap_map(PerlIO *f)
3514 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3515 IV flags = PerlIOBase(f)->flags;
3519 if (flags & PERLIO_F_CANREAD) {
3520 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3521 int fd = PerlIO_fileno(f);
3523 code = fstat(fd, &st);
3524 if (code == 0 && S_ISREG(st.st_mode)) {
3525 SSize_t len = st.st_size - b->posn;
3529 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3531 SETERRNO(0, SS$_NORMAL);
3532 # ifdef _SC_PAGESIZE
3533 page_size = sysconf(_SC_PAGESIZE);
3535 page_size = sysconf(_SC_PAGE_SIZE);
3537 if ((long) page_size < 0) {
3542 (void) SvUPGRADE(error, SVt_PV);
3543 msg = SvPVx(error, n_a);
3544 Perl_croak(aTHX_ "panic: sysconf: %s",
3549 "panic: sysconf: pagesize unknown");
3553 # ifdef HAS_GETPAGESIZE
3554 page_size = getpagesize();
3556 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3557 page_size = PAGESIZE; /* compiletime, bad */
3561 if ((IV) page_size <= 0)
3562 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3567 * This is a hack - should never happen - open should
3570 b->posn = PerlIO_tell(PerlIONext(f));
3572 posn = (b->posn / page_size) * page_size;
3573 len = st.st_size - posn;
3574 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3575 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3576 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3577 madvise(m->mptr, len, MADV_SEQUENTIAL);
3579 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3580 madvise(m->mptr, len, MADV_WILLNEED);
3582 PerlIOBase(f)->flags =
3583 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3584 b->end = ((STDCHAR *) m->mptr) + len;
3585 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3594 PerlIOBase(f)->flags =
3595 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3597 b->ptr = b->end = b->ptr;
3606 PerlIOMmap_unmap(PerlIO *f)
3608 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3609 PerlIOBuf *b = &m->base;
3613 code = munmap(m->mptr, m->len);
3617 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3620 b->ptr = b->end = b->buf;
3621 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3627 PerlIOMmap_get_base(PerlIO *f)
3629 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3630 PerlIOBuf *b = &m->base;
3631 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3633 * Already have a readbuffer in progress
3639 * We have a write buffer or flushed PerlIOBuf read buffer
3641 m->bbuf = b->buf; /* save it in case we need it again */
3642 b->buf = NULL; /* Clear to trigger below */
3645 PerlIOMmap_map(f); /* Try and map it */
3648 * Map did not work - recover PerlIOBuf buffer if we have one
3653 b->ptr = b->end = b->buf;
3656 return PerlIOBuf_get_base(f);
3660 PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3662 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3663 PerlIOBuf *b = &m->base;
3664 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3666 if (b->ptr && (b->ptr - count) >= b->buf
3667 && memEQ(b->ptr - count, vbuf, count)) {
3669 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3674 * Loose the unwritable mapped buffer
3678 * If flush took the "buffer" see if we have one from before
3680 if (!b->buf && m->bbuf)
3683 PerlIOBuf_get_base(f);
3687 return PerlIOBuf_unread(f, vbuf, count);
3691 PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3693 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3694 PerlIOBuf *b = &m->base;
3695 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3697 * No, or wrong sort of, buffer
3700 if (PerlIOMmap_unmap(f) != 0)
3704 * If unmap took the "buffer" see if we have one from before
3706 if (!b->buf && m->bbuf)
3709 PerlIOBuf_get_base(f);
3713 return PerlIOBuf_write(f, vbuf, count);
3717 PerlIOMmap_flush(PerlIO *f)
3719 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3720 PerlIOBuf *b = &m->base;
3721 IV code = PerlIOBuf_flush(f);
3723 * Now we are "synced" at PerlIOBuf level
3730 if (PerlIOMmap_unmap(f) != 0)
3735 * We seem to have a PerlIOBuf buffer which was not mapped
3736 * remember it in case we need one later
3745 PerlIOMmap_fill(PerlIO *f)
3747 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3748 IV code = PerlIO_flush(f);
3749 if (code == 0 && !b->buf) {
3750 code = PerlIOMmap_map(f);
3752 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3753 code = PerlIOBuf_fill(f);
3759 PerlIOMmap_close(PerlIO *f)
3761 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3762 PerlIOBuf *b = &m->base;
3763 IV code = PerlIO_flush(f);
3767 b->ptr = b->end = b->buf;
3769 if (PerlIOBuf_close(f) != 0)
3775 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
3777 return PerlIOBase_dup(aTHX_ f, o, param);
3781 PerlIO_funcs PerlIO_mmap = {
3801 PerlIOBase_clearerr,
3802 PerlIOBase_setlinebuf,
3803 PerlIOMmap_get_base,
3807 PerlIOBuf_set_ptrcnt,
3810 #endif /* HAS_MMAP */
3817 call_atexit(PerlIO_cleanup_layers, NULL);
3821 atexit(&PerlIO_cleanup);
3832 PerlIO_stdstreams(aTHX);
3837 #undef PerlIO_stdout
3843 PerlIO_stdstreams(aTHX);
3848 #undef PerlIO_stderr
3854 PerlIO_stdstreams(aTHX);
3859 /*--------------------------------------------------------------------------------------*/
3861 #undef PerlIO_getname
3863 PerlIO_getname(PerlIO *f, char *buf)
3868 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3870 name = fgetname(stdio, buf);
3872 Perl_croak(aTHX_ "Don't know how to get file name");
3878 /*--------------------------------------------------------------------------------------*/
3880 * Functions which can be called on any kind of PerlIO implemented in
3886 PerlIO_getc(PerlIO *f)
3889 SSize_t count = PerlIO_read(f, buf, 1);
3891 return (unsigned char) buf[0];
3896 #undef PerlIO_ungetc
3898 PerlIO_ungetc(PerlIO *f, int ch)
3902 if (PerlIO_unread(f, &buf, 1) == 1)
3910 PerlIO_putc(PerlIO *f, int ch)
3913 return PerlIO_write(f, &buf, 1);
3918 PerlIO_puts(PerlIO *f, const char *s)
3920 STRLEN len = strlen(s);
3921 return PerlIO_write(f, s, len);
3924 #undef PerlIO_rewind
3926 PerlIO_rewind(PerlIO *f)
3928 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3932 #undef PerlIO_vprintf
3934 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3937 SV *sv = newSVpvn("", 0);
3943 Perl_va_copy(ap, apc);
3944 sv_vcatpvf(sv, fmt, &apc);
3946 sv_vcatpvf(sv, fmt, &ap);
3949 wrote = PerlIO_write(f, s, len);
3954 #undef PerlIO_printf
3956 PerlIO_printf(PerlIO *f, const char *fmt, ...)
3961 result = PerlIO_vprintf(f, fmt, ap);
3966 #undef PerlIO_stdoutf
3968 PerlIO_stdoutf(const char *fmt, ...)
3973 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3978 #undef PerlIO_tmpfile
3980 PerlIO_tmpfile(void)
3983 * I have no idea how portable mkstemp() is ...
3985 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
3988 FILE *stdio = PerlSIO_tmpfile();
3991 PerlIOSelf(PerlIO_push
3992 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3993 "w+", Nullsv), PerlIOStdio);
3999 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4000 int fd = mkstemp(SvPVX(sv));
4003 f = PerlIO_fdopen(fd, "w+");
4005 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4007 PerlLIO_unlink(SvPVX(sv));
4017 #endif /* USE_SFIO */
4018 #endif /* PERLIO_IS_STDIO */
4020 /*======================================================================================*/
4022 * Now some functions in terms of above which may be needed even if we are
4023 * not in true PerlIO mode
4027 #undef PerlIO_setpos
4029 PerlIO_setpos(PerlIO *f, SV *pos)
4034 Off_t *posn = (Off_t *) SvPV(pos, len);
4035 if (f && len == sizeof(Off_t))
4036 return PerlIO_seek(f, *posn, SEEK_SET);
4038 SETERRNO(EINVAL, SS$_IVCHAN);
4042 #undef PerlIO_setpos
4044 PerlIO_setpos(PerlIO *f, SV *pos)
4049 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4050 if (f && len == sizeof(Fpos_t)) {
4051 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4052 return fsetpos64(f, fpos);
4054 return fsetpos(f, fpos);
4058 SETERRNO(EINVAL, SS$_IVCHAN);
4064 #undef PerlIO_getpos
4066 PerlIO_getpos(PerlIO *f, SV *pos)
4069 Off_t posn = PerlIO_tell(f);
4070 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4071 return (posn == (Off_t) - 1) ? -1 : 0;
4074 #undef PerlIO_getpos
4076 PerlIO_getpos(PerlIO *f, SV *pos)
4081 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4082 code = fgetpos64(f, &fpos);
4084 code = fgetpos(f, &fpos);
4086 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4091 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4094 vprintf(char *pat, char *args)
4096 _doprnt(pat, args, stdout);
4097 return 0; /* wrong, but perl doesn't use the return
4102 vfprintf(FILE *fd, char *pat, char *args)
4104 _doprnt(pat, args, fd);
4105 return 0; /* wrong, but perl doesn't use the return
4111 #ifndef PerlIO_vsprintf
4113 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4115 int val = vsprintf(s, fmt, ap);
4117 if (strlen(s) >= (STRLEN) n) {
4119 (void) PerlIO_puts(Perl_error_log,
4120 "panic: sprintf overflow - memory corrupted!\n");
4128 #ifndef PerlIO_sprintf
4130 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4135 result = PerlIO_vsprintf(s, n, fmt, ap);