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[perl5.git] / perlio.c
CommitLineData
14a5cf38
JH		 1/*
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.
760ac839
LW		 5 */
6
14a5cf38
JH		 7/*
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
11 */
7bcba3d4
NIS		 12#ifdef PERL_IMPLICIT_SYS
13#define dSYS dTHX
14#else
15#define dSYS dNOOP
16#endif
17
760ac839 18#define VOIDUSED 1
12ae5dfc
JH		 19#ifdef PERL_MICRO
20# include "uconfig.h"
21#else
22# include "config.h"
23#endif
760ac839 24
6f9d8c32 25#define PERLIO_NOT_STDIO 0
760ac839 26#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38
JH		 27/*
28 * #define PerlIO FILE
29 */
760ac839
LW		 30#endif
31/*
6f9d8c32 32 * This file provides those parts of PerlIO abstraction
88b61e10 33 * which are not #defined in perlio.h.
6f9d8c32 34 * Which these are depends on various Configure #ifdef's
760ac839
LW		 35 */
36
37#include "EXTERN.h"
864dbfa3 38#define PERL_IN_PERLIO_C
760ac839
LW		 39#include "perl.h"
40
0c4f7ff0
NIS		 41#include "XSUB.h"
42
5f1a76d0
NIS		 43#undef PerlMemShared_calloc
44#define PerlMemShared_calloc(x,y) calloc(x,y)
45#undef PerlMemShared_free
46#define PerlMemShared_free(x) free(x)
47
60382766 48int
f5b9d040 49perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 50{
14a5cf38
JH		 51 /*
52 * This used to be contents of do_binmode in doio.c
53 */
60382766
NIS		 54#ifdef DOSISH
55# if defined(atarist) || defined(__MINT__)
f5b9d040 56 if (!fflush(fp)) {
60382766 57 if (mode & O_BINARY)
14a5cf38 58 ((FILE *) fp)->_flag |= _IOBIN;
60382766 59 else
14a5cf38 60 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 61 return 1;
62 }
63 return 0;
64# else
eb73beca 65 dTHX;
14a5cf38
JH		 66#ifdef NETWARE
67 if (PerlLIO_setmode(fp, mode) != -1) {
68#else
f5b9d040 69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 70#endif
60382766 71# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38
JH		 72 /*
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
60382766 78 */
14a5cf38 79 fseek(fp, 0L, 0);
60382766 80 if (mode & O_BINARY)
f5b9d040 81 fp->flags |= _F_BIN;
60382766 82 else
14a5cf38 83 fp->flags &= ~_F_BIN;
60382766
NIS		 84# endif
85 return 1;
86 }
87 else
88 return 0;
89# endif
90#else
91# if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
93 return 1;
94 else
95 return 0;
96# else
97 return 1;
98# endif
99#endif
100}
101
eb73beca
NIS		 102#ifndef PERLIO_LAYERS
103int
104PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
105{
14a5cf38
JH		 106 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
107 return 0;
108 }
109 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
110 /*
111 * NOTREACHED
112 */
113 return -1;
eb73beca
NIS		 114}
115
13621cfb
NIS		 116void
117PerlIO_destruct(pTHX)
118{
119}
120
f5b9d040
NIS		 121int
122PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
123{
92bff44d 124#ifdef USE_SFIO
14a5cf38 125 return 1;
92bff44d 126#else
14a5cf38 127 return perlsio_binmode(fp, iotype, mode);
92bff44d 128#endif
f5b9d040 129}
60382766 130
14a5cf38
JH		 131/*
132 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
133 */
ee518936
NIS		 134
135PerlIO *
14a5cf38
JH		 136PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
137 int imode, int perm, PerlIO *old, int narg, SV **args)
138{
139 if (narg == 1) {
140 if (*args == &PL_sv_undef)
141 return PerlIO_tmpfile();
142 else {
143 char *name = SvPV_nolen(*args);
144 if (*mode == '#') {
145 fd = PerlLIO_open3(name, imode, perm);
146 if (fd >= 0)
147 return PerlIO_fdopen(fd, (char *) mode + 1);
148 }
149 else if (old) {
150 return PerlIO_reopen(name, mode, old);
151 }
152 else {
153 return PerlIO_open(name, mode);
154 }
155 }
156 }
157 else {
158 return PerlIO_fdopen(fd, (char *) mode);
159 }
160 return NULL;
ee518936
NIS		 161}
162
0c4f7ff0
NIS		 163XS(XS_PerlIO__Layer__find)
164{
14a5cf38
JH		 165 dXSARGS;
166 if (items < 2)
167 Perl_croak(aTHX_ "Usage class->find(name[,load])");
168 else {
169 char *name = SvPV_nolen(ST(1));
170 ST(0) = (strEQ(name, "crlf")
171 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
172 XSRETURN(1);
173 }
0c4f7ff0
NIS		 174}
175
176
177void
178Perl_boot_core_PerlIO(pTHX)
179{
14a5cf38 180 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 181}
182
ac27b0f5
NIS		 183#endif
184
32e30700 185
6f9d8c32 186#ifdef PERLIO_IS_STDIO
760ac839
LW		 187
188void
8ac85365 189PerlIO_init(void)
760ac839 190{
14a5cf38
JH		 191 /*
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
196 */
760ac839
LW		 197}
198
33dcbb9a 199#undef PerlIO_tmpfile
200PerlIO *
8ac85365 201PerlIO_tmpfile(void)
33dcbb9a 202{
14a5cf38 203 return tmpfile();
33dcbb9a 204}
205
14a5cf38 206#else /* PERLIO_IS_STDIO */
760ac839
LW		 207
208#ifdef USE_SFIO
209
210#undef HAS_FSETPOS
211#undef HAS_FGETPOS
212
14a5cf38
JH		 213/*
214 * This section is just to make sure these functions get pulled in from
215 * libsfio.a
216 */
760ac839
LW		 217
218#undef PerlIO_tmpfile
219PerlIO *
c78749f2 220PerlIO_tmpfile(void)
760ac839 221{
14a5cf38 222 return sftmp(0);
760ac839
LW		 223}
224
225void
c78749f2 226PerlIO_init(void)
760ac839 227{
14a5cf38
JH		 228 /*
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
232 */
760ac839 233
14a5cf38
JH		 234 /*
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
237 * writes to pipes.
238 */
239 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 240}
241
92bff44d
NIS		 242PerlIO *
243PerlIO_importFILE(FILE *stdio, int fl)
244{
14a5cf38
JH		 245 int fd = fileno(stdio);
246 PerlIO *r = PerlIO_fdopen(fd, "r+");
247 return r;
92bff44d
NIS		 248}
249
250FILE *
251PerlIO_findFILE(PerlIO *pio)
252{
14a5cf38
JH		 253 int fd = PerlIO_fileno(pio);
254 FILE *f = fdopen(fd, "r+");
255 PerlIO_flush(pio);
256 if (!f && errno == EINVAL)
257 f = fdopen(fd, "w");
258 if (!f && errno == EINVAL)
259 f = fdopen(fd, "r");
260 return f;
92bff44d
NIS		 261}
262
263
14a5cf38 264#else /* USE_SFIO */
6f9d8c32 265/*======================================================================================*/
14a5cf38
JH		 266/*
267 * Implement all the PerlIO interface ourselves.
9e353e3b 268 */
760ac839 269
76ced9ad
NIS		 270#include "perliol.h"
271
14a5cf38
JH		 272/*
273 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
274 * files
275 */
02f66e2f
NIS		 276#ifdef I_UNISTD
277#include <unistd.h>
278#endif
06da4f11
NIS		 279#ifdef HAS_MMAP
280#include <sys/mman.h>
281#endif
282
02f66e2f 283
14a5cf38
JH		 284void PerlIO_debug(const char *fmt, ...)
285 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 286
6f9d8c32 287void
14a5cf38
JH		 288PerlIO_debug(const char *fmt, ...)
289{
290 static int dbg = 0;
291 va_list ap;
292 dSYS;
293 va_start(ap, fmt);
294 if (!dbg) {
295 char *s = PerlEnv_getenv("PERLIO_DEBUG");
296 if (s && *s)
297 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
298 else
299 dbg = -1;
300 }
301 if (dbg > 0) {
302 dTHX;
303 SV *sv = newSVpvn("", 0);
304 char *s;
305 STRLEN len;
306 s = CopFILE(PL_curcop);
307 if (!s)
308 s = "(none)";
309 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
310 (IV) CopLINE(PL_curcop));
311 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
312
313 s = SvPV(sv, len);
314 PerlLIO_write(dbg, s, len);
315 SvREFCNT_dec(sv);
316 }
317 va_end(ap);
6f9d8c32
NIS		 318}
319
9e353e3b
NIS		 320/*--------------------------------------------------------------------------------------*/
321
14a5cf38
JH		 322/*
323 * Inner level routines
324 */
9e353e3b 325
14a5cf38
JH		 326/*
327 * Table of pointers to the PerlIO structs (malloc'ed)
328 */
329PerlIO *_perlio = NULL;
05d1247b 330#define PERLIO_TABLE_SIZE 64
6f9d8c32 331
e3f3bf95
NIS		 332
333
760ac839 334PerlIO *
5f1a76d0 335PerlIO_allocate(pTHX)
6f9d8c32 336{
14a5cf38
JH		 337 /*
338 * Find a free slot in the table, allocating new table as necessary
339 */
340 PerlIO **last;
341 PerlIO *f;
342 last = &_perlio;
343 while ((f = *last)) {
344 int i;
345 last = (PerlIO **) (f);
346 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
347 if (!*++f) {
348 return f;
349 }
350 }
351 }
352 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
353 if (!f) {
354 return NULL;
355 }
356 *last = f;
357 return f + 1;
05d1247b
NIS		 358}
359
360void
5f1a76d0 361PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 362{
14a5cf38
JH		 363 PerlIO *table = *tablep;
364 if (table) {
365 int i;
366 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
367 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
368 PerlIO *f = table + i;
369 if (*f) {
370 PerlIO_close(f);
371 }
372 }
373 PerlMemShared_free(table);
374 *tablep = NULL;
05d1247b 375 }
05d1247b
NIS		 376}
377
fcf2db38
NIS		 378PerlIO_list_t *PerlIO_known_layers;
379PerlIO_list_t *PerlIO_def_layerlist;
380
381PerlIO_list_t *
382PerlIO_list_alloc(void)
383{
14a5cf38
JH		 384 PerlIO_list_t *list;
385 Newz('L', list, 1, PerlIO_list_t);
386 list->refcnt = 1;
387 return list;
fcf2db38
NIS		 388}
389
390void
391PerlIO_list_free(PerlIO_list_t *list)
392{
14a5cf38
JH		 393 if (list) {
394 if (--list->refcnt == 0) {
395 if (list->array) {
396 dTHX;
397 IV i;
398 for (i = 0; i < list->cur; i++) {
399 if (list->array[i].arg)
400 SvREFCNT_dec(list->array[i].arg);
401 }
402 Safefree(list->array);
403 }
404 Safefree(list);
405 }
406 }
fcf2db38
NIS		 407}
408
409void
14a5cf38
JH		 410PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
411{
412 dTHX;
413 PerlIO_pair_t *p;
414 if (list->cur >= list->len) {
415 list->len += 8;
416 if (list->array)
417 Renew(list->array, list->len, PerlIO_pair_t);
418 else
419 New('l', list->array, list->len, PerlIO_pair_t);
420 }
421 p = &(list->array[list->cur++]);
422 p->funcs = funcs;
423 if ((p->arg = arg)) {
424 SvREFCNT_inc(arg);
425 }
fcf2db38
NIS		 426}
427
4a4a6116 428
05d1247b 429void
acfe0abc 430PerlIO_cleanup_layers(pTHX_ void *data)
9a6404c5 431{
fcf2db38 432#if 0
14a5cf38
JH		 433 PerlIO_known_layers = Nullhv;
434 PerlIO_def_layerlist = Nullav;
fcf2db38 435#endif
9a6404c5
DM		 436}
437
438void
5f1a76d0 439PerlIO_cleanup()
05d1247b 440{
14a5cf38
JH		 441 dTHX;
442 PerlIO_cleantable(aTHX_ & _perlio);
6f9d8c32
NIS		 443}
444
9e353e3b 445void
13621cfb
NIS		 446PerlIO_destruct(pTHX)
447{
14a5cf38
JH		 448 PerlIO **table = &_perlio;
449 PerlIO *f;
450 while ((f = *table)) {
451 int i;
452 table = (PerlIO **) (f++);
453 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
454 PerlIO *x = f;
455 PerlIOl *l;
456 while ((l = *x)) {
457 if (l->tab->kind & PERLIO_K_DESTRUCT) {
458 PerlIO_debug("Destruct popping %s\n", l->tab->name);
459 PerlIO_flush(x);
460 PerlIO_pop(aTHX_ x);
461 }
462 else {
463 x = PerlIONext(x);
464 }
465 }
466 f++;
467 }
468 }
13621cfb
NIS		 469}
470
471void
a999f61b 472PerlIO_pop(pTHX_ PerlIO *f)
760ac839 473{
14a5cf38
JH		 474 PerlIOl *l = *f;
475 if (l) {
476 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
477 if (l->tab->Popped) {
478 /*
479 * If popped returns non-zero do not free its layer structure
480 * it has either done so itself, or it is shared and still in
481 * use
482 */
483 if ((*l->tab->Popped) (f) != 0)
484 return;
485 }
486 *f = l->next;;
487 PerlMemShared_free(l);
a8c08ecd 488 }
6f9d8c32
NIS		 489}
490
9e353e3b 491/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 492/*
493 * XS Interface for perl code
494 */
9e353e3b 495
fcf2db38 496PerlIO_funcs *
2edd7e44 497PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 498{
14a5cf38
JH		 499 IV i;
500 if ((SSize_t) len <= 0)
501 len = strlen(name);
502 for (i = 0; i < PerlIO_known_layers->cur; i++) {
503 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
504 if (memEQ(f->name, name, len)) {
505 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
506 return f;
507 }
508 }
509 if (load && PL_subname && PerlIO_def_layerlist
510 && PerlIO_def_layerlist->cur >= 2) {
511 SV *pkgsv = newSVpvn("PerlIO", 6);
512 SV *layer = newSVpvn(name, len);
513 ENTER;
514 /*
515 * The two SVs are magically freed by load_module
516 */
517 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
518 LEAVE;
519 return PerlIO_find_layer(aTHX_ name, len, 0);
520 }
521 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
522 return NULL;
f3862f8b
NIS		 523}
524
2a1bc955 525#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 526
527static int
528perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
529{
14a5cf38
JH		 530 if (SvROK(sv)) {
531 IO *io = GvIOn((GV *) SvRV(sv));
532 PerlIO *ifp = IoIFP(io);
533 PerlIO *ofp = IoOFP(io);
534 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
535 }
536 return 0;
b13b2135
NIS		 537}
538
539static int
540perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
541{
14a5cf38
JH		 542 if (SvROK(sv)) {
543 IO *io = GvIOn((GV *) SvRV(sv));
544 PerlIO *ifp = IoIFP(io);
545 PerlIO *ofp = IoOFP(io);
546 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
547 }
548 return 0;
b13b2135
NIS		 549}
550
551static int
552perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
553{
14a5cf38
JH		 554 Perl_warn(aTHX_ "clear %" SVf, sv);
555 return 0;
b13b2135
NIS		 556}
557
558static int
559perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
560{
14a5cf38
JH		 561 Perl_warn(aTHX_ "free %" SVf, sv);
562 return 0;
b13b2135
NIS		 563}
564
565MGVTBL perlio_vtab = {
14a5cf38
JH		 566 perlio_mg_get,
567 perlio_mg_set,
568 NULL, /* len */
569 perlio_mg_clear,
570 perlio_mg_free
b13b2135
NIS		 571};
572
573XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
574{
14a5cf38
JH		 575 dXSARGS;
576 SV *sv = SvRV(ST(1));
577 AV *av = newAV();
578 MAGIC *mg;
579 int count = 0;
580 int i;
581 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
582 SvRMAGICAL_off(sv);
583 mg = mg_find(sv, PERL_MAGIC_ext);
584 mg->mg_virtual = &perlio_vtab;
585 mg_magical(sv);
586 Perl_warn(aTHX_ "attrib %" SVf, sv);
587 for (i = 2; i < items; i++) {
588 STRLEN len;
589 const char *name = SvPV(ST(i), len);
590 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
591 if (layer) {
592 av_push(av, SvREFCNT_inc(layer));
593 }
594 else {
595 ST(count) = ST(i);
596 count++;
597 }
598 }
599 SvREFCNT_dec(av);
600 XSRETURN(count);
601}
602
603#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 604
e3f3bf95
NIS		 605SV *
606PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 607{
14a5cf38
JH		 608 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
609 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
610 return sv;
e3f3bf95
NIS		 611}
612
0c4f7ff0
NIS		 613XS(XS_PerlIO__Layer__find)
614{
14a5cf38
JH		 615 dXSARGS;
616 if (items < 2)
617 Perl_croak(aTHX_ "Usage class->find(name[,load])");
618 else {
619 STRLEN len = 0;
620 char *name = SvPV(ST(1), len);
621 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
622 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
623 ST(0) =
624 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
625 &PL_sv_undef;
626 XSRETURN(1);
627 }
0c4f7ff0
NIS		 628}
629
e3f3bf95
NIS		 630void
631PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
632{
14a5cf38
JH		 633 if (!PerlIO_known_layers)
634 PerlIO_known_layers = PerlIO_list_alloc();
635 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
636 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 637}
638
1141d9f8 639int
fcf2db38 640PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 641{
14a5cf38
JH		 642 if (names) {
643 const char *s = names;
644 while (*s) {
645 while (isSPACE(*s) || *s == ':')
646 s++;
647 if (*s) {
648 STRLEN llen = 0;
649 const char *e = s;
650 const char *as = Nullch;
651 STRLEN alen = 0;
652 if (!isIDFIRST(*s)) {
653 /*
654 * Message is consistent with how attribute lists are
655 * passed. Even though this means "foo : : bar" is
656 * seen as an invalid separator character.
657 */
658 char q = ((*s == '\'') ? '"' : '\'');
659 Perl_warn(aTHX_
660 "perlio: invalid separator character %c%c%c in layer specification list",
661 q, *s, q);
662 return -1;
663 }
664 do {
665 e++;
666 } while (isALNUM(*e));
667 llen = e - s;
668 if (*e == '(') {
669 int nesting = 1;
670 as = ++e;
671 while (nesting) {
672 switch (*e++) {
673 case ')':
674 if (--nesting == 0)
675 alen = (e - 1) - as;
676 break;
677 case '(':
678 ++nesting;
679 break;
680 case '\\':
681 /*
682 * It's a nul terminated string, not allowed
683 * to \ the terminating null. Anything other
684 * character is passed over.
685 */
686 if (*e++) {
687 break;
688 }
689 /*
690 * Drop through
691 */
692 case '\0':
693 e--;
694 Perl_warn(aTHX_
695 "perlio: argument list not closed for layer \"%.*s\"",
696 (int) (e - s), s);
697 return -1;
698 default:
699 /*
700 * boring.
701 */
702 break;
703 }
704 }
705 }
706 if (e > s) {
707 PerlIO_funcs *layer =
708 PerlIO_find_layer(aTHX_ s, llen, 1);
709 if (layer) {
710 PerlIO_list_push(av, layer,
711 (as) ? newSVpvn(as,
712 alen) :
713 &PL_sv_undef);
714 }
715 else {
716 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
717 (int) llen, s);
718 return -1;
719 }
720 }
721 s = e;
722 }
723 }
724 }
725 return 0;
1141d9f8
NIS		 726}
727
dfebf958 728void
fcf2db38 729PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 730{
14a5cf38
JH		 731 PerlIO_funcs *tab = &PerlIO_perlio;
732 if (O_BINARY != O_TEXT) {
733 tab = &PerlIO_crlf;
734 }
735 else {
736 if (PerlIO_stdio.Set_ptrcnt) {
737 tab = &PerlIO_stdio;
738 }
dfebf958 739 }
14a5cf38
JH		 740 PerlIO_debug("Pushing %s\n", tab->name);
741 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
742 &PL_sv_undef);
dfebf958
NIS		 743}
744
e3f3bf95 745SV *
14a5cf38 746PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 747{
14a5cf38 748 return av->array[n].arg;
e3f3bf95
NIS		 749}
750
f3862f8b 751PerlIO_funcs *
14a5cf38 752PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 753{
14a5cf38
JH		 754 if (n >= 0 && n < av->cur) {
755 PerlIO_debug("Layer %" IVdf " is %s\n", n,
756 av->array[n].funcs->name);
757 return av->array[n].funcs;
758 }
759 if (!def)
760 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
761 return def;
e3f3bf95
NIS		 762}
763
fcf2db38 764PerlIO_list_t *
e3f3bf95
NIS		 765PerlIO_default_layers(pTHX)
766{
14a5cf38
JH		 767 if (!PerlIO_def_layerlist) {
768 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
769 PerlIO_funcs *osLayer = &PerlIO_unix;
770 PerlIO_def_layerlist = PerlIO_list_alloc();
771 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 772#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 773 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 774#if 0
14a5cf38 775 osLayer = &PerlIO_win32;
0c4128ad 776#endif
2f8118af 777#endif
14a5cf38
JH		 778 PerlIO_define_layer(aTHX_ & PerlIO_raw);
779 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
780 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
781 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 782#ifdef HAS_MMAP
14a5cf38 783 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 784#endif
14a5cf38
JH		 785 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
786 PerlIO_define_layer(aTHX_ & PerlIO_byte);
787 PerlIO_list_push(PerlIO_def_layerlist,
788 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
789 &PL_sv_undef);
790 if (s) {
791 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
792 }
793 else {
794 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
795 }
1141d9f8 796 }
14a5cf38
JH		 797 if (PerlIO_def_layerlist->cur < 2) {
798 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
f3862f8b 799 }
14a5cf38 800 return PerlIO_def_layerlist;
e3f3bf95
NIS		 801}
802
0c4f7ff0
NIS		 803void
804Perl_boot_core_PerlIO(pTHX)
805{
806#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 807 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
808 __FILE__);
0c4f7ff0 809#endif
14a5cf38 810 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 811}
e3f3bf95
NIS		 812
813PerlIO_funcs *
814PerlIO_default_layer(pTHX_ I32 n)
815{
14a5cf38
JH		 816 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
817 if (n < 0)
818 n += av->cur;
819 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 820}
821
a999f61b
NIS		 822#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
823#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 824
825void
1141d9f8 826PerlIO_stdstreams(pTHX)
60382766 827{
14a5cf38
JH		 828 if (!_perlio) {
829 PerlIO_allocate(aTHX);
830 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
831 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
832 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
833 }
60382766
NIS		 834}
835
836PerlIO *
14a5cf38
JH		 837PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
838{
839 PerlIOl *l = NULL;
840 l = PerlMemShared_calloc(tab->size, sizeof(char));
841 if (l) {
842 Zero(l, tab->size, char);
843 l->next = *f;
844 l->tab = tab;
845 *f = l;
846 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
847 (mode) ? mode : "(Null)", arg);
848 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
849 PerlIO_pop(aTHX_ f);
850 return NULL;
851 }
852 }
853 return f;
60382766
NIS		 854}
855
dfebf958 856IV
e3f3bf95 857PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 858{
14a5cf38
JH		 859 dTHX;
860 PerlIO_pop(aTHX_ f);
861 if (*f) {
862 PerlIO_flush(f);
863 PerlIO_pop(aTHX_ f);
864 return 0;
865 }
866 return -1;
4b803d04
NIS		 867}
868
869IV
e3f3bf95 870PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 871{
14a5cf38
JH		 872 /*
873 * Remove the dummy layer
874 */
875 dTHX;
876 PerlIO_pop(aTHX_ f);
877 /*
878 * Pop back to bottom layer
879 */
880 if (f && *f) {
881 PerlIO_flush(f);
882 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
883 if (*PerlIONext(f)) {
884 PerlIO_pop(aTHX_ f);
885 }
886 else {
887 /*
888 * Nothing bellow - push unix on top then remove it
889 */
890 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
891 PerlIO_pop(aTHX_ PerlIONext(f));
892 }
893 break;
894 }
895 }
896 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
897 return 0;
898 }
899 return -1;
dfebf958
NIS		 900}
901
ac27b0f5 902int
14a5cf38
JH		 903PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
904 PerlIO_list_t *layers, IV n)
905{
906 IV max = layers->cur;
907 int code = 0;
908 while (n < max) {
909 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
910 if (tab) {
911 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
912 code = -1;
913 break;
914 }
915 }
916 n++;
917 }
918 return code;
e3f3bf95
NIS		 919}
920
921int
ac27b0f5
NIS		 922PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
923{
14a5cf38
JH		 924 int code = 0;
925 if (names) {
926 PerlIO_list_t *layers = PerlIO_list_alloc();
927 code = PerlIO_parse_layers(aTHX_ layers, names);
928 if (code == 0) {
929 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
930 }
931 PerlIO_list_free(layers);
ac27b0f5 932 }
14a5cf38 933 return code;
ac27b0f5
NIS		 934}
935
f3862f8b 936
60382766 937/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 938/*
939 * Given the abstraction above the public API functions
940 */
60382766
NIS		 941
942int
f5b9d040 943PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 944{
14a5cf38
JH		 945 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
946 f, PerlIOBase(f)->tab->name, iotype, mode,
947 (names) ? names : "(Null)");
948 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
949 PerlIO *top = f;
950 while (*top) {
951 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
952 PerlIO_flush(top);
953 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
954 break;
955 }
956 top = PerlIONext(top);
957 }
958 }
959 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 960}
961
962#undef PerlIO__close
963int
964PerlIO__close(PerlIO *f)
965{
14a5cf38
JH		 966 if (f && *f)
967 return (*PerlIOBase(f)->tab->Close) (f);
968 else {
969 SETERRNO(EBADF, SS$_IVCHAN);
970 return -1;
971 }
76ced9ad
NIS		 972}
973
5f1a76d0
NIS		 974#undef PerlIO_fdupopen
975PerlIO *
976PerlIO_fdupopen(pTHX_ PerlIO *f)
977{
14a5cf38
JH		 978 if (f && *f) {
979 char buf[8];
980 int fd = PerlLIO_dup(PerlIO_fileno(f));
981 PerlIO *new = PerlIO_fdopen(fd, PerlIO_modestr(f, buf));
982 if (new) {
983 Off_t posn = PerlIO_tell(f);
984 PerlIO_seek(new, posn, SEEK_SET);
985 }
986 return new;
987 }
988 else {
989 SETERRNO(EBADF, SS$_IVCHAN);
990 return NULL;
991 }
5f1a76d0 992}
f5b9d040 993
b931b1d9
NIS		 994#undef PerlIO_close
995int
996PerlIO_close(PerlIO *f)
997{
14a5cf38
JH		 998 dTHX;
999 int code = -1;
1000 if (f && *f) {
1001 code = (*PerlIOBase(f)->tab->Close) (f);
1002 while (*f) {
1003 PerlIO_pop(aTHX_ f);
1004 }
f6c77cf1 1005 }
14a5cf38 1006 return code;
b931b1d9
NIS		 1007}
1008
1009#undef PerlIO_fileno
1010int
1011PerlIO_fileno(PerlIO *f)
1012{
14a5cf38
JH		 1013 if (f && *f)
1014 return (*PerlIOBase(f)->tab->Fileno) (f);
1015 else {
1016 SETERRNO(EBADF, SS$_IVCHAN);
1017 return -1;
1018 }
b931b1d9
NIS		 1019}
1020
1141d9f8
NIS		 1021static const char *
1022PerlIO_context_layers(pTHX_ const char *mode)
1023{
14a5cf38
JH		 1024 const char *type = NULL;
1025 /*
1026 * Need to supply default layer info from open.pm
1027 */
1028 if (PL_curcop) {
1029 SV *layers = PL_curcop->cop_io;
1030 if (layers) {
1031 STRLEN len;
1032 type = SvPV(layers, len);
1033 if (type && mode[0] != 'r') {
1034 /*
1035 * Skip to write part
1036 */
1037 const char *s = strchr(type, 0);
1038 if (s && (s - type) < len) {
1039 type = s + 1;
1040 }
1041 }
1042 }
1043 }
1044 return type;
1141d9f8
NIS		 1045}
1046
fcf2db38 1047static PerlIO_funcs *
2edd7e44
NIS		 1048PerlIO_layer_from_ref(pTHX_ SV *sv)
1049{
14a5cf38
JH		 1050 /*
1051 * For any scalar type load the handler which is bundled with perl
1052 */
1053 if (SvTYPE(sv) < SVt_PVAV)
1054 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1055
1056 /*
1057 * For other types allow if layer is known but don't try and load it
1058 */
1059 switch (SvTYPE(sv)) {
1060 case SVt_PVAV:
1061 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1062 case SVt_PVHV:
1063 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1064 case SVt_PVCV:
1065 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1066 case SVt_PVGV:
1067 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1068 }
1069 return NULL;
2edd7e44
NIS		 1070}
1071
fcf2db38 1072PerlIO_list_t *
14a5cf38
JH		 1073PerlIO_resolve_layers(pTHX_ const char *layers,
1074 const char *mode, int narg, SV **args)
1075{
1076 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1077 int incdef = 1;
1078 if (!_perlio)
1079 PerlIO_stdstreams(aTHX);
1080 if (narg) {
1081 SV *arg = *args;
1082 /*
1083 * If it is a reference but not an object see if we have a handler
1084 * for it
1085 */
1086 if (SvROK(arg) && !sv_isobject(arg)) {
1087 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1088 if (handler) {
1089 def = PerlIO_list_alloc();
1090 PerlIO_list_push(def, handler, &PL_sv_undef);
1091 incdef = 0;
1092 }
1093 /*
1094 * Don't fail if handler cannot be found :Via(...) etc. may do
1095 * something sensible else we will just stringfy and open
1096 * resulting string.
1097 */
1098 }
1099 }
1100 if (!layers)
1101 layers = PerlIO_context_layers(aTHX_ mode);
1102 if (layers && *layers) {
1103 PerlIO_list_t *av;
1104 if (incdef) {
1105 IV i = def->cur;
1106 av = PerlIO_list_alloc();
1107 for (i = 0; i < def->cur; i++) {
1108 PerlIO_list_push(av, def->array[i].funcs,
1109 def->array[i].arg);
1110 }
1111 }
1112 else {
1113 av = def;
1114 }
1115 PerlIO_parse_layers(aTHX_ av, layers);
1116 return av;
1117 }
1118 else {
1119 if (incdef)
1120 def->refcnt++;
1121 return def;
1122 }
ee518936
NIS		 1123}
1124
1125PerlIO *
14a5cf38
JH		 1126PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1127 int imode, int perm, PerlIO *f, int narg, SV **args)
1128{
1129 if (!f && narg == 1 && *args == &PL_sv_undef) {
1130 if ((f = PerlIO_tmpfile())) {
1131 if (!layers)
1132 layers = PerlIO_context_layers(aTHX_ mode);
1133 if (layers && *layers)
1134 PerlIO_apply_layers(aTHX_ f, mode, layers);
1135 }
1136 }
1137 else {
1138 PerlIO_list_t *layera = NULL;
1139 IV n;
1140 PerlIO_funcs *tab = NULL;
1141 if (f && *f) {
1142 /*
1143 * This is "reopen" - it is not tested as perl does not use it
1144 * yet
1145 */
1146 PerlIOl *l = *f;
1147 layera = PerlIO_list_alloc();
1148 while (l) {
1149 SV *arg =
1150 (l->tab->Getarg) ? (*l->tab->
1151 Getarg) (&l) : &PL_sv_undef;
1152 PerlIO_list_push(layera, l->tab, arg);
1153 l = *PerlIONext(&l);
1154 }
1155 }
1156 else {
1157 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1158 }
1159 /*
1160 * Start at "top" of layer stack
1161 */
1162 n = layera->cur - 1;
1163 while (n >= 0) {
1164 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1165 if (t && t->Open) {
1166 tab = t;
1167 break;
1168 }
1169 n--;
1170 }
1171 if (tab) {
1172 /*
1173 * Found that layer 'n' can do opens - call it
1174 */
1175 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1176 tab->name, layers, mode, fd, imode, perm, f, narg,
1177 args);
1178 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1179 f, narg, args);
1180 if (f) {
1181 if (n + 1 < layera->cur) {
1182 /*
1183 * More layers above the one that we used to open -
1184 * apply them now
1185 */
1186 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1187 != 0) {
1188 f = NULL;
1189 }
1190 }
1191 }
1192 }
1193 PerlIO_list_free(layera);
1194 }
1195 return f;
ee518936 1196}
b931b1d9
NIS		 1197
1198
9e353e3b
NIS		 1199#undef PerlIO_fdopen
1200PerlIO *
1201PerlIO_fdopen(int fd, const char *mode)
1202{
14a5cf38
JH		 1203 dTHX;
1204 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1205}
1206
6f9d8c32
NIS		 1207#undef PerlIO_open
1208PerlIO *
1209PerlIO_open(const char *path, const char *mode)
1210{
14a5cf38
JH		 1211 dTHX;
1212 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1213 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1214}
1215
9e353e3b
NIS		 1216#undef PerlIO_reopen
1217PerlIO *
1218PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1219{
14a5cf38
JH		 1220 dTHX;
1221 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1222 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1223}
1224
9e353e3b
NIS		 1225#undef PerlIO_read
1226SSize_t
1227PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1228{
14a5cf38
JH		 1229 if (f && *f)
1230 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1231 else {
1232 SETERRNO(EBADF, SS$_IVCHAN);
1233 return -1;
1234 }
760ac839
LW		 1235}
1236
313ca112
NIS		 1237#undef PerlIO_unread
1238SSize_t
1239PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1240{
14a5cf38
JH		 1241 if (f && *f)
1242 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1243 else {
1244 SETERRNO(EBADF, SS$_IVCHAN);
1245 return -1;
1246 }
760ac839
LW		 1247}
1248
9e353e3b
NIS		 1249#undef PerlIO_write
1250SSize_t
1251PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1252{
14a5cf38
JH		 1253 if (f && *f)
1254 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1255 else {
1256 SETERRNO(EBADF, SS$_IVCHAN);
1257 return -1;
1258 }
760ac839
LW		 1259}
1260
9e353e3b 1261#undef PerlIO_seek
6f9d8c32 1262int
9e353e3b 1263PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1264{
14a5cf38
JH		 1265 if (f && *f)
1266 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1267 else {
1268 SETERRNO(EBADF, SS$_IVCHAN);
1269 return -1;
1270 }
760ac839
LW		 1271}
1272
9e353e3b
NIS		 1273#undef PerlIO_tell
1274Off_t
1275PerlIO_tell(PerlIO *f)
760ac839 1276{
14a5cf38
JH		 1277 if (f && *f)
1278 return (*PerlIOBase(f)->tab->Tell) (f);
1279 else {
1280 SETERRNO(EBADF, SS$_IVCHAN);
1281 return -1;
1282 }
760ac839
LW		 1283}
1284
9e353e3b 1285#undef PerlIO_flush
6f9d8c32 1286int
9e353e3b 1287PerlIO_flush(PerlIO *f)
760ac839 1288{
14a5cf38
JH		 1289 if (f) {
1290 if (*f) {
1291 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1292 if (tab && tab->Flush) {
1293 return (*tab->Flush) (f);
1294 }
1295 else {
1296 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1297 SETERRNO(EBADF, SS$_IVCHAN);
1298 return -1;
1299 }
1300 }
1301 else {
1302 PerlIO_debug("Cannot flush f=%p\n", f);
1303 SETERRNO(EBADF, SS$_IVCHAN);
1304 return -1;
1305 }
1306 }
1307 else {
1308 /*
1309 * Is it good API design to do flush-all on NULL, a potentially
1310 * errorneous input? Maybe some magical value (PerlIO*
1311 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1312 * things on fflush(NULL), but should we be bound by their design
1313 * decisions? --jhi
1314 */
1315 PerlIO **table = &_perlio;
1316 int code = 0;
1317 while ((f = *table)) {
1318 int i;
1319 table = (PerlIO **) (f++);
1320 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1321 if (*f && PerlIO_flush(f) != 0)
1322 code = -1;
1323 f++;
1324 }
1325 }
1326 return code;
1327 }
760ac839
LW		 1328}
1329
a9c883f6
NIS		 1330void
1331PerlIOBase_flush_linebuf()
1332{
14a5cf38
JH		 1333 PerlIO **table = &_perlio;
1334 PerlIO *f;
1335 while ((f = *table)) {
1336 int i;
1337 table = (PerlIO **) (f++);
1338 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1339 if (*f
1340 && (PerlIOBase(f)->
1341 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1342 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1343 PerlIO_flush(f);
1344 f++;
1345 }
a9c883f6 1346 }
a9c883f6
NIS		 1347}
1348
06da4f11
NIS		 1349#undef PerlIO_fill
1350int
1351PerlIO_fill(PerlIO *f)
1352{
14a5cf38
JH		 1353 if (f && *f)
1354 return (*PerlIOBase(f)->tab->Fill) (f);
1355 else {
1356 SETERRNO(EBADF, SS$_IVCHAN);
1357 return -1;
1358 }
06da4f11
NIS		 1359}
1360
f3862f8b
NIS		 1361#undef PerlIO_isutf8
1362int
1363PerlIO_isutf8(PerlIO *f)
1364{
14a5cf38
JH		 1365 if (f && *f)
1366 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1367 else {
1368 SETERRNO(EBADF, SS$_IVCHAN);
1369 return -1;
1370 }
f3862f8b
NIS		 1371}
1372
9e353e3b 1373#undef PerlIO_eof
6f9d8c32 1374int
9e353e3b 1375PerlIO_eof(PerlIO *f)
760ac839 1376{
14a5cf38
JH		 1377 if (f && *f)
1378 return (*PerlIOBase(f)->tab->Eof) (f);
1379 else {
1380 SETERRNO(EBADF, SS$_IVCHAN);
1381 return -1;
1382 }
9e353e3b
NIS		 1383}
1384
1385#undef PerlIO_error
1386int
1387PerlIO_error(PerlIO *f)
1388{
14a5cf38
JH		 1389 if (f && *f)
1390 return (*PerlIOBase(f)->tab->Error) (f);
1391 else {
1392 SETERRNO(EBADF, SS$_IVCHAN);
1393 return -1;
1394 }
9e353e3b
NIS		 1395}
1396
1397#undef PerlIO_clearerr
1398void
1399PerlIO_clearerr(PerlIO *f)
1400{
14a5cf38
JH		 1401 if (f && *f)
1402 (*PerlIOBase(f)->tab->Clearerr) (f);
1403 else
1404 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1405}
1406
1407#undef PerlIO_setlinebuf
1408void
1409PerlIO_setlinebuf(PerlIO *f)
1410{
14a5cf38
JH		 1411 if (f && *f)
1412 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1413 else
1414 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1415}
1416
1417#undef PerlIO_has_base
1418int
1419PerlIO_has_base(PerlIO *f)
1420{
14a5cf38
JH		 1421 if (f && *f) {
1422 return (PerlIOBase(f)->tab->Get_base != NULL);
1423 }
1424 return 0;
760ac839
LW		 1425}
1426
9e353e3b
NIS		 1427#undef PerlIO_fast_gets
1428int
1429PerlIO_fast_gets(PerlIO *f)
760ac839 1430{
14a5cf38
JH		 1431 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1432 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1433 return (tab->Set_ptrcnt != NULL);
1434 }
1435 return 0;
9e353e3b
NIS		 1436}
1437
1438#undef PerlIO_has_cntptr
1439int
1440PerlIO_has_cntptr(PerlIO *f)
1441{
14a5cf38
JH		 1442 if (f && *f) {
1443 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1444 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1445 }
1446 return 0;
9e353e3b
NIS		 1447}
1448
1449#undef PerlIO_canset_cnt
1450int
1451PerlIO_canset_cnt(PerlIO *f)
1452{
14a5cf38
JH		 1453 if (f && *f) {
1454 PerlIOl *l = PerlIOBase(f);
1455 return (l->tab->Set_ptrcnt != NULL);
1456 }
1457 return 0;
760ac839
LW		 1458}
1459
1460#undef PerlIO_get_base
888911fc 1461STDCHAR *
a20bf0c3 1462PerlIO_get_base(PerlIO *f)
760ac839 1463{
14a5cf38
JH		 1464 if (f && *f)
1465 return (*PerlIOBase(f)->tab->Get_base) (f);
1466 return NULL;
9e353e3b
NIS		 1467}
1468
1469#undef PerlIO_get_bufsiz
1470int
1471PerlIO_get_bufsiz(PerlIO *f)
1472{
14a5cf38
JH		 1473 if (f && *f)
1474 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1475 return 0;
9e353e3b
NIS		 1476}
1477
1478#undef PerlIO_get_ptr
1479STDCHAR *
1480PerlIO_get_ptr(PerlIO *f)
1481{
14a5cf38
JH		 1482 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1483 if (tab->Get_ptr == NULL)
1484 return NULL;
1485 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1486}
1487
1488#undef PerlIO_get_cnt
05d1247b 1489int
9e353e3b
NIS		 1490PerlIO_get_cnt(PerlIO *f)
1491{
14a5cf38
JH		 1492 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1493 if (tab->Get_cnt == NULL)
1494 return 0;
1495 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1496}
1497
1498#undef PerlIO_set_cnt
1499void
14a5cf38 1500PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1501{
14a5cf38 1502 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1503}
1504
1505#undef PerlIO_set_ptrcnt
1506void
14a5cf38 1507PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1508{
14a5cf38
JH		 1509 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1510 if (tab->Set_ptrcnt == NULL) {
1511 dTHX;
1512 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1513 }
1514 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1515}
1516
1517/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 1518/*
1519 * utf8 and raw dummy layers
1520 */
dfebf958 1521
26fb694e 1522IV
e3f3bf95 1523PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1524{
14a5cf38
JH		 1525 if (PerlIONext(f)) {
1526 dTHX;
1527 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1528 PerlIO_pop(aTHX_ f);
1529 if (tab->kind & PERLIO_K_UTF8)
1530 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1531 else
1532 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1533 return 0;
1534 }
1535 return -1;
26fb694e
NIS		 1536}
1537
dfebf958 1538PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1539 "utf8",
1540 sizeof(PerlIOl),
1541 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1542 PerlIOUtf8_pushed,
1543 NULL,
1544 NULL,
1545 NULL,
1546 NULL,
1547 NULL,
1548 NULL,
1549 NULL,
1550 NULL,
1551 NULL,
1552 NULL,
1553 NULL, /* flush */
1554 NULL, /* fill */
1555 NULL,
1556 NULL,
1557 NULL,
1558 NULL,
1559 NULL, /* get_base */
1560 NULL, /* get_bufsiz */
1561 NULL, /* get_ptr */
1562 NULL, /* get_cnt */
1563 NULL, /* set_ptrcnt */
26fb694e
NIS		 1564};
1565
1566PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1567 "bytes",
1568 sizeof(PerlIOl),
1569 PERLIO_K_DUMMY,
1570 PerlIOUtf8_pushed,
1571 NULL,
1572 NULL,
1573 NULL,
1574 NULL,
1575 NULL,
1576 NULL,
1577 NULL,
1578 NULL,
1579 NULL,
1580 NULL,
1581 NULL, /* flush */
1582 NULL, /* fill */
1583 NULL,
1584 NULL,
1585 NULL,
1586 NULL,
1587 NULL, /* get_base */
1588 NULL, /* get_bufsiz */
1589 NULL, /* get_ptr */
1590 NULL, /* get_cnt */
1591 NULL, /* set_ptrcnt */
dfebf958
NIS		 1592};
1593
1594PerlIO *
14a5cf38
JH		 1595PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1596 IV n, const char *mode, int fd, int imode, int perm,
1597 PerlIO *old, int narg, SV **args)
dfebf958 1598{
14a5cf38
JH		 1599 PerlIO_funcs *tab = PerlIO_default_btm();
1600 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1601 old, narg, args);
dfebf958
NIS		 1602}
1603
1604PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1605 "raw",
1606 sizeof(PerlIOl),
1607 PERLIO_K_DUMMY,
1608 PerlIORaw_pushed,
1609 PerlIOBase_popped,
1610 PerlIORaw_open,
1611 NULL,
1612 NULL,
1613 NULL,
1614 NULL,
1615 NULL,
1616 NULL,
1617 NULL,
1618 NULL,
1619 NULL, /* flush */
1620 NULL, /* fill */
1621 NULL,
1622 NULL,
1623 NULL,
1624 NULL,
1625 NULL, /* get_base */
1626 NULL, /* get_bufsiz */
1627 NULL, /* get_ptr */
1628 NULL, /* get_cnt */
1629 NULL, /* set_ptrcnt */
dfebf958
NIS		 1630};
1631/*--------------------------------------------------------------------------------------*/
1632/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 1633/*
1634 * "Methods" of the "base class"
1635 */
9e353e3b
NIS		 1636
1637IV
1638PerlIOBase_fileno(PerlIO *f)
1639{
14a5cf38 1640 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1641}
1642
f5b9d040 1643char *
14a5cf38
JH		 1644PerlIO_modestr(PerlIO *f, char *buf)
1645{
1646 char *s = buf;
1647 IV flags = PerlIOBase(f)->flags;
1648 if (flags & PERLIO_F_APPEND) {
1649 *s++ = 'a';
1650 if (flags & PERLIO_F_CANREAD) {
1651 *s++ = '+';
1652 }
1653 }
1654 else if (flags & PERLIO_F_CANREAD) {
1655 *s++ = 'r';
1656 if (flags & PERLIO_F_CANWRITE)
1657 *s++ = '+';
1658 }
1659 else if (flags & PERLIO_F_CANWRITE) {
1660 *s++ = 'w';
1661 if (flags & PERLIO_F_CANREAD) {
1662 *s++ = '+';
1663 }
1664 }
5f1a76d0 1665#if O_TEXT != O_BINARY
14a5cf38
JH		 1666 if (!(flags & PERLIO_F_CRLF))
1667 *s++ = 'b';
5f1a76d0 1668#endif
14a5cf38
JH		 1669 *s = '\0';
1670 return buf;
f5b9d040
NIS		 1671}
1672
76ced9ad 1673IV
e3f3bf95 1674PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1675{
14a5cf38 1676 PerlIOl *l = PerlIOBase(f);
b7953727 1677#if 0
14a5cf38
JH		 1678 const char *omode = mode;
1679 char temp[8];
b7953727 1680#endif
14a5cf38
JH		 1681 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1682 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1683 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1684 if (tab->Set_ptrcnt != NULL)
1685 l->flags |= PERLIO_F_FASTGETS;
1686 if (mode) {
1687 if (*mode == '#' || *mode == 'I')
1688 mode++;
1689 switch (*mode++) {
1690 case 'r':
1691 l->flags |= PERLIO_F_CANREAD;
1692 break;
1693 case 'a':
1694 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1695 break;
1696 case 'w':
1697 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1698 break;
1699 default:
1700 SETERRNO(EINVAL, LIB$_INVARG);
1701 return -1;
1702 }
1703 while (*mode) {
1704 switch (*mode++) {
1705 case '+':
1706 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1707 break;
1708 case 'b':
1709 l->flags &= ~PERLIO_F_CRLF;
1710 break;
1711 case 't':
1712 l->flags |= PERLIO_F_CRLF;
1713 break;
1714 default:
1715 SETERRNO(EINVAL, LIB$_INVARG);
1716 return -1;
1717 }
1718 }
1719 }
1720 else {
1721 if (l->next) {
1722 l->flags |= l->next->flags &
1723 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1724 PERLIO_F_APPEND);
1725 }
1726 }
5e2ab84b 1727#if 0
14a5cf38
JH		 1728 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1729 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1730 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1731#endif
14a5cf38 1732 return 0;
76ced9ad
NIS		 1733}
1734
1735IV
1736PerlIOBase_popped(PerlIO *f)
1737{
14a5cf38 1738 return 0;
760ac839
LW		 1739}
1740
9e353e3b
NIS		 1741SSize_t
1742PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1743{
14a5cf38
JH		 1744 dTHX;
1745 /*
1746 * Save the position as current head considers it
1747 */
1748 Off_t old = PerlIO_tell(f);
1749 SSize_t done;
1750 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1751 PerlIOSelf(f, PerlIOBuf)->posn = old;
1752 done = PerlIOBuf_unread(f, vbuf, count);
1753 return done;
9e353e3b
NIS		 1754}
1755
f6c77cf1
NIS		 1756SSize_t
1757PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1758{
14a5cf38
JH		 1759 STDCHAR *buf = (STDCHAR *) vbuf;
1760 if (f) {
1761 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1762 return 0;
1763 while (count > 0) {
1764 SSize_t avail = PerlIO_get_cnt(f);
1765 SSize_t take = 0;
1766 if (avail > 0)
1767 take = (count < avail) ? count : avail;
1768 if (take > 0) {
1769 STDCHAR *ptr = PerlIO_get_ptr(f);
1770 Copy(ptr, buf, take, STDCHAR);
1771 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1772 count -= take;
1773 buf += take;
1774 }
1775 if (count > 0 && avail <= 0) {
1776 if (PerlIO_fill(f) != 0)
1777 break;
1778 }
1779 }
1780 return (buf - (STDCHAR *) vbuf);
1781 }
f6c77cf1 1782 return 0;
f6c77cf1
NIS		 1783}
1784
9e353e3b 1785IV
06da4f11 1786PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1787{
14a5cf38 1788 return 0;
9e353e3b
NIS		 1789}
1790
1791IV
06da4f11
NIS		 1792PerlIOBase_noop_fail(PerlIO *f)
1793{
14a5cf38 1794 return -1;
06da4f11
NIS		 1795}
1796
1797IV
9e353e3b
NIS		 1798PerlIOBase_close(PerlIO *f)
1799{
14a5cf38
JH		 1800 IV code = 0;
1801 PerlIO *n = PerlIONext(f);
1802 if (PerlIO_flush(f) != 0)
1803 code = -1;
1804 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1805 code = -1;
1806 PerlIOBase(f)->flags &=
1807 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1808 return code;
9e353e3b
NIS		 1809}
1810
1811IV
1812PerlIOBase_eof(PerlIO *f)
1813{
14a5cf38
JH		 1814 if (f && *f) {
1815 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1816 }
1817 return 1;
9e353e3b
NIS		 1818}
1819
1820IV
1821PerlIOBase_error(PerlIO *f)
1822{
14a5cf38
JH		 1823 if (f && *f) {
1824 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1825 }
1826 return 1;
9e353e3b
NIS		 1827}
1828
1829void
1830PerlIOBase_clearerr(PerlIO *f)
1831{
14a5cf38
JH		 1832 if (f && *f) {
1833 PerlIO *n = PerlIONext(f);
1834 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1835 if (n)
1836 PerlIO_clearerr(n);
1837 }
9e353e3b
NIS		 1838}
1839
1840void
1841PerlIOBase_setlinebuf(PerlIO *f)
1842{
14a5cf38
JH		 1843 if (f) {
1844 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1845 }
9e353e3b
NIS		 1846}
1847
9e353e3b 1848/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 1849/*
1850 * Bottom-most level for UNIX-like case
1851 */
9e353e3b 1852
14a5cf38
JH		 1853typedef struct {
1854 struct _PerlIO base; /* The generic part */
1855 int fd; /* UNIX like file descriptor */
1856 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 1857} PerlIOUnix;
1858
6f9d8c32 1859int
9e353e3b 1860PerlIOUnix_oflags(const char *mode)
760ac839 1861{
14a5cf38
JH		 1862 int oflags = -1;
1863 if (*mode == 'I' || *mode == '#')
1864 mode++;
1865 switch (*mode) {
1866 case 'r':
1867 oflags = O_RDONLY;
1868 if (*++mode == '+') {
1869 oflags = O_RDWR;
1870 mode++;
1871 }
1872 break;
1873
1874 case 'w':
1875 oflags = O_CREAT | O_TRUNC;
1876 if (*++mode == '+') {
1877 oflags |= O_RDWR;
1878 mode++;
1879 }
1880 else
1881 oflags |= O_WRONLY;
1882 break;
1883
1884 case 'a':
1885 oflags = O_CREAT | O_APPEND;
1886 if (*++mode == '+') {
1887 oflags |= O_RDWR;
1888 mode++;
1889 }
1890 else
1891 oflags |= O_WRONLY;
1892 break;
1893 }
1894 if (*mode == 'b') {
1895 oflags |= O_BINARY;
1896 oflags &= ~O_TEXT;
1897 mode++;
1898 }
1899 else if (*mode == 't') {
1900 oflags |= O_TEXT;
1901 oflags &= ~O_BINARY;
1902 mode++;
1903 }
1904 /*
1905 * Always open in binary mode
1906 */
1907 oflags |= O_BINARY;
1908 if (*mode || oflags == -1) {
1909 SETERRNO(EINVAL, LIB$_INVARG);
1910 oflags = -1;
1911 }
1912 return oflags;
9e353e3b
NIS		 1913}
1914
1915IV
1916PerlIOUnix_fileno(PerlIO *f)
1917{
14a5cf38 1918 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 1919}
1920
4b803d04 1921IV
e3f3bf95 1922PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 1923{
14a5cf38
JH		 1924 IV code = PerlIOBase_pushed(f, mode, arg);
1925 if (*PerlIONext(f)) {
1926 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1927 s->fd = PerlIO_fileno(PerlIONext(f));
1928 /*
1929 * XXX could (or should) we retrieve the oflags from the open file
1930 * handle rather than believing the "mode" we are passed in? XXX
1931 * Should the value on NULL mode be 0 or -1?
1932 */
1933 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1934 }
1935 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1936 return code;
4b803d04
NIS		 1937}
1938
9e353e3b 1939PerlIO *
14a5cf38
JH		 1940PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1941 IV n, const char *mode, int fd, int imode,
1942 int perm, PerlIO *f, int narg, SV **args)
1943{
1944 if (f) {
1945 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1946 (*PerlIOBase(f)->tab->Close) (f);
1947 }
1948 if (narg > 0) {
1949 char *path = SvPV_nolen(*args);
1950 if (*mode == '#')
1951 mode++;
1952 else {
1953 imode = PerlIOUnix_oflags(mode);
1954 perm = 0666;
1955 }
1956 if (imode != -1) {
1957 fd = PerlLIO_open3(path, imode, perm);
1958 }
1959 }
1960 if (fd >= 0) {
1961 PerlIOUnix *s;
1962 if (*mode == 'I')
1963 mode++;
1964 if (!f) {
1965 f = PerlIO_allocate(aTHX);
1966 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1967 PerlIOUnix);
1968 }
1969 else
1970 s = PerlIOSelf(f, PerlIOUnix);
1971 s->fd = fd;
1972 s->oflags = imode;
1973 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1974 return f;
1975 }
1976 else {
1977 if (f) {
1978 /*
1979 * FIXME: pop layers ???
1980 */
1981 }
1982 return NULL;
1983 }
9e353e3b
NIS		 1984}
1985
1986SSize_t
1987PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
1988{
14a5cf38
JH		 1989 dTHX;
1990 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
1991 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1992 return 0;
1993 while (1) {
1994 SSize_t len = PerlLIO_read(fd, vbuf, count);
1995 if (len >= 0 || errno != EINTR) {
1996 if (len < 0)
1997 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
1998 else if (len == 0 && count != 0)
1999 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2000 return len;
2001 }
2002 PERL_ASYNC_CHECK();
2003 }
9e353e3b
NIS		 2004}
2005
2006SSize_t
2007PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2008{
14a5cf38
JH		 2009 dTHX;
2010 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2011 while (1) {
2012 SSize_t len = PerlLIO_write(fd, vbuf, count);
2013 if (len >= 0 || errno != EINTR) {
2014 if (len < 0)
2015 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2016 return len;
2017 }
2018 PERL_ASYNC_CHECK();
06da4f11 2019 }
9e353e3b
NIS		 2020}
2021
2022IV
2023PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2024{
14a5cf38
JH		 2025 dSYS;
2026 Off_t new =
2027 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2028 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2029 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2030}
2031
2032Off_t
2033PerlIOUnix_tell(PerlIO *f)
2034{
14a5cf38
JH		 2035 dSYS;
2036 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2037}
2038
2039IV
2040PerlIOUnix_close(PerlIO *f)
2041{
14a5cf38
JH		 2042 dTHX;
2043 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2044 int code = 0;
2045 while (PerlLIO_close(fd) != 0) {
2046 if (errno != EINTR) {
2047 code = -1;
2048 break;
2049 }
2050 PERL_ASYNC_CHECK();
2051 }
2052 if (code == 0) {
2053 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2054 }
2055 return code;
9e353e3b
NIS		 2056}
2057
2058PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2059 "unix",
2060 sizeof(PerlIOUnix),
2061 PERLIO_K_RAW,
2062 PerlIOUnix_pushed,
2063 PerlIOBase_noop_ok,
2064 PerlIOUnix_open,
2065 NULL,
2066 PerlIOUnix_fileno,
2067 PerlIOUnix_read,
2068 PerlIOBase_unread,
2069 PerlIOUnix_write,
2070 PerlIOUnix_seek,
2071 PerlIOUnix_tell,
2072 PerlIOUnix_close,
2073 PerlIOBase_noop_ok, /* flush */
2074 PerlIOBase_noop_fail, /* fill */
2075 PerlIOBase_eof,
2076 PerlIOBase_error,
2077 PerlIOBase_clearerr,
2078 PerlIOBase_setlinebuf,
2079 NULL, /* get_base */
2080 NULL, /* get_bufsiz */
2081 NULL, /* get_ptr */
2082 NULL, /* get_cnt */
2083 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2084};
2085
2086/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 2087/*
2088 * stdio as a layer
2089 */
9e353e3b 2090
14a5cf38
JH		 2091typedef struct {
2092 struct _PerlIO base;
2093 FILE *stdio; /* The stream */
9e353e3b
NIS		 2094} PerlIOStdio;
2095
2096IV
2097PerlIOStdio_fileno(PerlIO *f)
2098{
14a5cf38
JH		 2099 dSYS;
2100 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2101}
2102
766a733e 2103char *
14a5cf38
JH		 2104PerlIOStdio_mode(const char *mode, char *tmode)
2105{
2106 char *ret = tmode;
2107 while (*mode) {
2108 *tmode++ = *mode++;
2109 }
2110 if (O_BINARY != O_TEXT) {
2111 *tmode++ = 'b';
2112 }
2113 *tmode = '\0';
2114 return ret;
2115}
2116
2117/*
2118 * This isn't used yet ...
2119 */
4b803d04 2120IV
e3f3bf95 2121PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2122{
14a5cf38
JH		 2123 if (*PerlIONext(f)) {
2124 dSYS;
2125 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2126 char tmode[8];
2127 FILE *stdio =
2128 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2129 PerlIOStdio_mode(mode, tmode));
2130 if (stdio)
2131 s->stdio = stdio;
2132 else
2133 return -1;
2134 }
2135 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2136}
2137
9e353e3b
NIS		 2138#undef PerlIO_importFILE
2139PerlIO *
2140PerlIO_importFILE(FILE *stdio, int fl)
2141{
14a5cf38
JH		 2142 dTHX;
2143 PerlIO *f = NULL;
2144 if (stdio) {
2145 PerlIOStdio *s =
2146 PerlIOSelf(PerlIO_push
2147 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2148 "r+", Nullsv), PerlIOStdio);
2149 s->stdio = stdio;
2150 }
2151 return f;
9e353e3b
NIS		 2152}
2153
2154PerlIO *
14a5cf38
JH		 2155PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2156 IV n, const char *mode, int fd, int imode,
2157 int perm, PerlIO *f, int narg, SV **args)
2158{
2159 char tmode[8];
2160 if (f) {
2161 char *path = SvPV_nolen(*args);
2162 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2163 FILE *stdio =
2164 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2165 s->stdio);
2166 if (!s->stdio)
2167 return NULL;
2168 s->stdio = stdio;
2169 return f;
2170 }
2171 else {
2172 if (narg > 0) {
2173 char *path = SvPV_nolen(*args);
2174 if (*mode == '#') {
2175 mode++;
2176 fd = PerlLIO_open3(path, imode, perm);
2177 }
2178 else {
2179 FILE *stdio = PerlSIO_fopen(path, mode);
2180 if (stdio) {
2181 PerlIOStdio *s =
2182 PerlIOSelf(PerlIO_push
2183 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2184 (mode = PerlIOStdio_mode(mode, tmode)),
2185 PerlIOArg),
2186 PerlIOStdio);
2187 s->stdio = stdio;
2188 }
2189 return f;
2190 }
2191 }
2192 if (fd >= 0) {
2193 FILE *stdio = NULL;
2194 int init = 0;
2195 if (*mode == 'I') {
2196 init = 1;
2197 mode++;
2198 }
2199 if (init) {
2200 switch (fd) {
2201 case 0:
2202 stdio = PerlSIO_stdin;
2203 break;
2204 case 1:
2205 stdio = PerlSIO_stdout;
2206 break;
2207 case 2:
2208 stdio = PerlSIO_stderr;
2209 break;
2210 }
2211 }
2212 else {
2213 stdio = PerlSIO_fdopen(fd, mode =
2214 PerlIOStdio_mode(mode, tmode));
2215 }
2216 if (stdio) {
2217 PerlIOStdio *s =
2218 PerlIOSelf(PerlIO_push
2219 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2220 mode, PerlIOArg), PerlIOStdio);
2221 s->stdio = stdio;
2222 return f;
2223 }
2224 }
2225 }
ee518936 2226 return NULL;
9e353e3b
NIS		 2227}
2228
2229SSize_t
2230PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2231{
14a5cf38
JH		 2232 dSYS;
2233 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2234 SSize_t got = 0;
2235 if (count == 1) {
2236 STDCHAR *buf = (STDCHAR *) vbuf;
2237 /*
2238 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2239 * stdio does not do that for fread()
2240 */
2241 int ch = PerlSIO_fgetc(s);
2242 if (ch != EOF) {
2243 *buf = ch;
2244 got = 1;
2245 }
2246 }
2247 else
2248 got = PerlSIO_fread(vbuf, 1, count, s);
2249 return got;
9e353e3b
NIS		 2250}
2251
2252SSize_t
2253PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2254{
14a5cf38
JH		 2255 dSYS;
2256 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2257 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2258 SSize_t unread = 0;
2259 while (count > 0) {
2260 int ch = *buf-- & 0xff;
2261 if (PerlSIO_ungetc(ch, s) != ch)
2262 break;
2263 unread++;
2264 count--;
2265 }
2266 return unread;
9e353e3b
NIS		 2267}
2268
2269SSize_t
2270PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2271{
14a5cf38
JH		 2272 dSYS;
2273 return PerlSIO_fwrite(vbuf, 1, count,
2274 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2275}
2276
2277IV
2278PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2279{
14a5cf38
JH		 2280 dSYS;
2281 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2282 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2283}
2284
2285Off_t
2286PerlIOStdio_tell(PerlIO *f)
2287{
14a5cf38
JH		 2288 dSYS;
2289 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2290 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2291}
2292
2293IV
2294PerlIOStdio_close(PerlIO *f)
2295{
14a5cf38 2296 dSYS;
af130d45 2297#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2298 int optval;
2299 Sock_size_t optlen = sizeof(int);
8e4bc33b 2300#endif
14a5cf38
JH		 2301 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2302 return (
af130d45 2303#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2304 (getsockopt
2305 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2306 &optlen) <
2307 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2308#else
14a5cf38 2309 PerlSIO_fclose(stdio)
8e4bc33b 2310#endif
14a5cf38 2311 );
8e4bc33b 2312
9e353e3b
NIS		 2313}
2314
2315IV
2316PerlIOStdio_flush(PerlIO *f)
2317{
14a5cf38
JH		 2318 dSYS;
2319 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2320 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2321 return PerlSIO_fflush(stdio);
2322 }
2323 else {
88b61e10 2324#if 0
14a5cf38
JH		 2325 /*
2326 * FIXME: This discards ungetc() and pre-read stuff which is not
2327 * right if this is just a "sync" from a layer above Suspect right
2328 * design is to do _this_ but not have layer above flush this
2329 * layer read-to-read
2330 */
2331 /*
2332 * Not writeable - sync by attempting a seek
2333 */
2334 int err = errno;
2335 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2336 errno = err;
88b61e10 2337#endif
14a5cf38
JH		 2338 }
2339 return 0;
9e353e3b
NIS		 2340}
2341
2342IV
06da4f11
NIS		 2343PerlIOStdio_fill(PerlIO *f)
2344{
14a5cf38
JH		 2345 dSYS;
2346 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2347 int c;
2348 /*
2349 * fflush()ing read-only streams can cause trouble on some stdio-s
2350 */
2351 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2352 if (PerlSIO_fflush(stdio) != 0)
2353 return EOF;
2354 }
2355 c = PerlSIO_fgetc(stdio);
2356 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2357 return EOF;
2358 return 0;
06da4f11
NIS		 2359}
2360
2361IV
9e353e3b
NIS		 2362PerlIOStdio_eof(PerlIO *f)
2363{
14a5cf38
JH		 2364 dSYS;
2365 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2366}
2367
2368IV
2369PerlIOStdio_error(PerlIO *f)
2370{
14a5cf38
JH		 2371 dSYS;
2372 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2373}
2374
2375void
2376PerlIOStdio_clearerr(PerlIO *f)
2377{
14a5cf38
JH		 2378 dSYS;
2379 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2380}
2381
2382void
2383PerlIOStdio_setlinebuf(PerlIO *f)
2384{
14a5cf38 2385 dSYS;
9e353e3b 2386#ifdef HAS_SETLINEBUF
14a5cf38 2387 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2388#else
14a5cf38 2389 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2390#endif
2391}
2392
2393#ifdef FILE_base
2394STDCHAR *
2395PerlIOStdio_get_base(PerlIO *f)
2396{
14a5cf38
JH		 2397 dSYS;
2398 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2399 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2400}
2401
2402Size_t
2403PerlIOStdio_get_bufsiz(PerlIO *f)
2404{
14a5cf38
JH		 2405 dSYS;
2406 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2407 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2408}
2409#endif
2410
2411#ifdef USE_STDIO_PTR
2412STDCHAR *
2413PerlIOStdio_get_ptr(PerlIO *f)
2414{
14a5cf38
JH		 2415 dSYS;
2416 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2417 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2418}
2419
2420SSize_t
2421PerlIOStdio_get_cnt(PerlIO *f)
2422{
14a5cf38
JH		 2423 dSYS;
2424 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2425 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2426}
2427
2428void
14a5cf38 2429PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2430{
14a5cf38
JH		 2431 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2432 dSYS;
2433 if (ptr != NULL) {
9e353e3b 2434#ifdef STDIO_PTR_LVALUE
14a5cf38 2435 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2436#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2437 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2438 dTHX;
2439 assert(PerlSIO_get_cnt(stdio) == (cnt));
2440 }
9e353e3b
NIS		 2441#endif
2442#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38
JH		 2443 /*
2444 * Setting ptr _does_ change cnt - we are done
2445 */
2446 return;
9e353e3b 2447#endif
14a5cf38
JH		 2448#else /* STDIO_PTR_LVALUE */
2449 PerlProc_abort();
2450#endif /* STDIO_PTR_LVALUE */
2451 }
2452 /*
2453 * Now (or only) set cnt
2454 */
9e353e3b 2455#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2456 PerlSIO_set_cnt(stdio, cnt);
2457#else /* STDIO_CNT_LVALUE */
9e353e3b 2458#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2459 PerlSIO_set_ptr(stdio,
2460 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2461 cnt));
2462#else /* STDIO_PTR_LVAL_SETS_CNT */
2463 PerlProc_abort();
2464#endif /* STDIO_PTR_LVAL_SETS_CNT */
2465#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2466}
2467
2468#endif
2469
2470PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2471 "stdio",
2472 sizeof(PerlIOStdio),
2473 PERLIO_K_BUFFERED,
2474 PerlIOBase_pushed,
2475 PerlIOBase_noop_ok,
2476 PerlIOStdio_open,
2477 NULL,
2478 PerlIOStdio_fileno,
2479 PerlIOStdio_read,
2480 PerlIOStdio_unread,
2481 PerlIOStdio_write,
2482 PerlIOStdio_seek,
2483 PerlIOStdio_tell,
2484 PerlIOStdio_close,
2485 PerlIOStdio_flush,
2486 PerlIOStdio_fill,
2487 PerlIOStdio_eof,
2488 PerlIOStdio_error,
2489 PerlIOStdio_clearerr,
2490 PerlIOStdio_setlinebuf,
9e353e3b 2491#ifdef FILE_base
14a5cf38
JH		 2492 PerlIOStdio_get_base,
2493 PerlIOStdio_get_bufsiz,
9e353e3b 2494#else
14a5cf38
JH		 2495 NULL,
2496 NULL,
9e353e3b
NIS		 2497#endif
2498#ifdef USE_STDIO_PTR
14a5cf38
JH		 2499 PerlIOStdio_get_ptr,
2500 PerlIOStdio_get_cnt,
0eb1d8a4 2501#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2502 PerlIOStdio_set_ptrcnt
2503#else /* STDIO_PTR_LVALUE */
2504 NULL
2505#endif /* STDIO_PTR_LVALUE */
2506#else /* USE_STDIO_PTR */
2507 NULL,
2508 NULL,
2509 NULL
2510#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2511};
2512
2513#undef PerlIO_exportFILE
2514FILE *
2515PerlIO_exportFILE(PerlIO *f, int fl)
2516{
14a5cf38
JH		 2517 FILE *stdio;
2518 PerlIO_flush(f);
2519 stdio = fdopen(PerlIO_fileno(f), "r+");
2520 if (stdio) {
2521 dTHX;
2522 PerlIOStdio *s =
2523 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2524 PerlIOStdio);
2525 s->stdio = stdio;
2526 }
2527 return stdio;
9e353e3b
NIS		 2528}
2529
2530#undef PerlIO_findFILE
2531FILE *
2532PerlIO_findFILE(PerlIO *f)
2533{
14a5cf38
JH		 2534 PerlIOl *l = *f;
2535 while (l) {
2536 if (l->tab == &PerlIO_stdio) {
2537 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2538 return s->stdio;
2539 }
2540 l = *PerlIONext(&l);
f7e7eb72 2541 }
14a5cf38 2542 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2543}
2544
2545#undef PerlIO_releaseFILE
2546void
2547PerlIO_releaseFILE(PerlIO *p, FILE *f)
2548{
2549}
2550
2551/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 2552/*
2553 * perlio buffer layer
2554 */
9e353e3b 2555
5e2ab84b 2556IV
e3f3bf95 2557PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2558{
14a5cf38
JH		 2559 dSYS;
2560 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2561 int fd = PerlIO_fileno(f);
2562 Off_t posn;
2563 if (fd >= 0 && PerlLIO_isatty(fd)) {
2564 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2565 }
2566 posn = PerlIO_tell(PerlIONext(f));
2567 if (posn != (Off_t) - 1) {
2568 b->posn = posn;
2569 }
2570 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2571}
2572
9e353e3b 2573PerlIO *
14a5cf38
JH		 2574PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2575 IV n, const char *mode, int fd, int imode, int perm,
2576 PerlIO *f, int narg, SV **args)
2577{
2578 if (f) {
2579 PerlIO *next = PerlIONext(f);
2580 PerlIO_funcs *tab =
2581 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2582 next =
2583 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2584 next, narg, args);
2585 if (!next
2586 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2587 return NULL;
2588 }
2589 }
2590 else {
2591 PerlIO_funcs *tab =
2592 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2593 int init = 0;
2594 if (*mode == 'I') {
2595 init = 1;
2596 /*
2597 * mode++;
2598 */
2599 }
2600 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2601 NULL, narg, args);
2602 if (f) {
2603 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2604 fd = PerlIO_fileno(f);
ee518936 2605#if O_BINARY != O_TEXT
14a5cf38
JH		 2606 /*
2607 * do something about failing setmode()? --jhi
2608 */
2609 PerlLIO_setmode(fd, O_BINARY);
ee518936 2610#endif
14a5cf38
JH		 2611 if (init && fd == 2) {
2612 /*
2613 * Initial stderr is unbuffered
2614 */
2615 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2616 }
2617 }
ee518936 2618 }
14a5cf38 2619 return f;
9e353e3b
NIS		 2620}
2621
14a5cf38
JH		 2622/*
2623 * This "flush" is akin to sfio's sync in that it handles files in either
2624 * read or write state
2625 */
9e353e3b
NIS		 2626IV
2627PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2628{
14a5cf38
JH		 2629 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2630 int code = 0;
2631 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2632 /*
2633 * write() the buffer
2634 */
2635 STDCHAR *buf = b->buf;
2636 STDCHAR *p = buf;
2637 PerlIO *n = PerlIONext(f);
2638 while (p < b->ptr) {
2639 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2640 if (count > 0) {
2641 p += count;
2642 }
2643 else if (count < 0 || PerlIO_error(n)) {
2644 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2645 code = -1;
2646 break;
2647 }
2648 }
2649 b->posn += (p - buf);
2650 }
2651 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2652 STDCHAR *buf = PerlIO_get_base(f);
2653 /*
2654 * Note position change
2655 */
2656 b->posn += (b->ptr - buf);
2657 if (b->ptr < b->end) {
2658 /*
2659 * We did not consume all of it
2660 */
2661 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2662 b->posn = PerlIO_tell(PerlIONext(f));
2663 }
2664 }
2665 }
2666 b->ptr = b->end = b->buf;
2667 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2668 /*
2669 * FIXME: Is this right for read case ?
2670 */
2671 if (PerlIO_flush(PerlIONext(f)) != 0)
2672 code = -1;
2673 return code;
6f9d8c32
NIS		 2674}
2675
06da4f11
NIS		 2676IV
2677PerlIOBuf_fill(PerlIO *f)
2678{
14a5cf38
JH		 2679 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2680 PerlIO *n = PerlIONext(f);
2681 SSize_t avail;
2682 /*
2683 * FIXME: doing the down-stream flush is a bad idea if it causes
2684 * pre-read data in stdio buffer to be discarded but this is too
2685 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
2686 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
2687 */
2688 if (PerlIO_flush(f) != 0)
2689 return -1;
2690 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2691 PerlIOBase_flush_linebuf();
2692
2693 if (!b->buf)
2694 PerlIO_get_base(f); /* allocate via vtable */
2695
2696 b->ptr = b->end = b->buf;
2697 if (PerlIO_fast_gets(n)) {
2698 /*
2699 * Layer below is also buffered We do _NOT_ want to call its
2700 * ->Read() because that will loop till it gets what we asked for
2701 * which may hang on a pipe etc. Instead take anything it has to
2702 * hand, or ask it to fill _once_.
2703 */
2704 avail = PerlIO_get_cnt(n);
2705 if (avail <= 0) {
2706 avail = PerlIO_fill(n);
2707 if (avail == 0)
2708 avail = PerlIO_get_cnt(n);
2709 else {
2710 if (!PerlIO_error(n) && PerlIO_eof(n))
2711 avail = 0;
2712 }
2713 }
2714 if (avail > 0) {
2715 STDCHAR *ptr = PerlIO_get_ptr(n);
2716 SSize_t cnt = avail;
2717 if (avail > b->bufsiz)
2718 avail = b->bufsiz;
2719 Copy(ptr, b->buf, avail, STDCHAR);
2720 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2721 }
2722 }
2723 else {
2724 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2725 }
2726 if (avail <= 0) {
2727 if (avail == 0)
2728 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2729 else
2730 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2731 return -1;
2732 }
2733 b->end = b->buf + avail;
2734 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2735 return 0;
06da4f11
NIS		 2736}
2737
6f9d8c32 2738SSize_t
9e353e3b 2739PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2740{
14a5cf38
JH		 2741 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2742 if (f) {
2743 if (!b->ptr)
2744 PerlIO_get_base(f);
2745 return PerlIOBase_read(f, vbuf, count);
2746 }
2747 return 0;
6f9d8c32
NIS		 2748}
2749
9e353e3b
NIS		 2750SSize_t
2751PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2752{
14a5cf38
JH		 2753 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2754 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2755 SSize_t unread = 0;
2756 SSize_t avail;
2757 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2758 PerlIO_flush(f);
2759 if (!b->buf)
2760 PerlIO_get_base(f);
2761 if (b->buf) {
2762 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2763 /*
2764 * Buffer is already a read buffer, we can overwrite any chars
2765 * which have been read back to buffer start
2766 */
2767 avail = (b->ptr - b->buf);
2768 }
2769 else {
2770 /*
2771 * Buffer is idle, set it up so whole buffer is available for
2772 * unread
2773 */
2774 avail = b->bufsiz;
2775 b->end = b->buf + avail;
2776 b->ptr = b->end;
2777 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2778 /*
2779 * Buffer extends _back_ from where we are now
2780 */
2781 b->posn -= b->bufsiz;
2782 }
2783 if (avail > (SSize_t) count) {
2784 /*
2785 * If we have space for more than count, just move count
2786 */
2787 avail = count;
2788 }
2789 if (avail > 0) {
2790 b->ptr -= avail;
2791 buf -= avail;
2792 /*
2793 * In simple stdio-like ungetc() case chars will be already
2794 * there
2795 */
2796 if (buf != b->ptr) {
2797 Copy(buf, b->ptr, avail, STDCHAR);
2798 }
2799 count -= avail;
2800 unread += avail;
2801 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2802 }
2803 }
2804 return unread;
760ac839
LW		 2805}
2806
9e353e3b
NIS		 2807SSize_t
2808PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2809{
14a5cf38
JH		 2810 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2811 const STDCHAR *buf = (const STDCHAR *) vbuf;
2812 Size_t written = 0;
2813 if (!b->buf)
2814 PerlIO_get_base(f);
2815 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2816 return 0;
2817 while (count > 0) {
2818 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2819 if ((SSize_t) count < avail)
2820 avail = count;
2821 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2822 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2823 while (avail > 0) {
2824 int ch = *buf++;
2825 *(b->ptr)++ = ch;
2826 count--;
2827 avail--;
2828 written++;
2829 if (ch == '\n') {
2830 PerlIO_flush(f);
2831 break;
2832 }
2833 }
2834 }
2835 else {
2836 if (avail) {
2837 Copy(buf, b->ptr, avail, STDCHAR);
2838 count -= avail;
2839 buf += avail;
2840 written += avail;
2841 b->ptr += avail;
2842 }
2843 }
2844 if (b->ptr >= (b->buf + b->bufsiz))
2845 PerlIO_flush(f);
2846 }
2847 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2848 PerlIO_flush(f);
2849 return written;
9e353e3b
NIS		 2850}
2851
2852IV
2853PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2854{
14a5cf38
JH		 2855 IV code;
2856 if ((code = PerlIO_flush(f)) == 0) {
2857 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2858 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2859 code = PerlIO_seek(PerlIONext(f), offset, whence);
2860 if (code == 0) {
2861 b->posn = PerlIO_tell(PerlIONext(f));
2862 }
9e353e3b 2863 }
14a5cf38 2864 return code;
9e353e3b
NIS		 2865}
2866
2867Off_t
2868PerlIOBuf_tell(PerlIO *f)
2869{
14a5cf38
JH		 2870 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2871 /*
2872 * b->posn is file position where b->buf was read, or will be written
2873 */
2874 Off_t posn = b->posn;
2875 if (b->buf) {
2876 /*
2877 * If buffer is valid adjust position by amount in buffer
2878 */
2879 posn += (b->ptr - b->buf);
2880 }
2881 return posn;
9e353e3b
NIS		 2882}
2883
2884IV
2885PerlIOBuf_close(PerlIO *f)
2886{
14a5cf38
JH		 2887 IV code = PerlIOBase_close(f);
2888 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2889 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2890 PerlMemShared_free(b->buf);
2891 }
2892 b->buf = NULL;
2893 b->ptr = b->end = b->buf;
2894 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2895 return code;
760ac839
LW		 2896}
2897
9e353e3b
NIS		 2898STDCHAR *
2899PerlIOBuf_get_ptr(PerlIO *f)
2900{
14a5cf38
JH		 2901 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2902 if (!b->buf)
2903 PerlIO_get_base(f);
2904 return b->ptr;
9e353e3b
NIS		 2905}
2906
05d1247b 2907SSize_t
9e353e3b
NIS		 2908PerlIOBuf_get_cnt(PerlIO *f)
2909{
14a5cf38
JH		 2910 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2911 if (!b->buf)
2912 PerlIO_get_base(f);
2913 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
2914 return (b->end - b->ptr);
2915 return 0;
9e353e3b
NIS		 2916}
2917
2918STDCHAR *
2919PerlIOBuf_get_base(PerlIO *f)
2920{
14a5cf38
JH		 2921 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2922 if (!b->buf) {
2923 if (!b->bufsiz)
2924 b->bufsiz = 4096;
2925 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
2926 if (!b->buf) {
2927 b->buf = (STDCHAR *) & b->oneword;
2928 b->bufsiz = sizeof(b->oneword);
2929 }
2930 b->ptr = b->buf;
2931 b->end = b->ptr;
06da4f11 2932 }
14a5cf38 2933 return b->buf;
9e353e3b
NIS		 2934}
2935
2936Size_t
2937PerlIOBuf_bufsiz(PerlIO *f)
2938{
14a5cf38
JH		 2939 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2940 if (!b->buf)
2941 PerlIO_get_base(f);
2942 return (b->end - b->buf);
9e353e3b
NIS		 2943}
2944
2945void
14a5cf38 2946PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2947{
14a5cf38
JH		 2948 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2949 if (!b->buf)
2950 PerlIO_get_base(f);
2951 b->ptr = ptr;
2952 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
2953 dTHX;
2954 assert(PerlIO_get_cnt(f) == cnt);
2955 assert(b->ptr >= b->buf);
2956 }
2957 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 2958}
2959
9e353e3b 2960PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 2961 "perlio",
2962 sizeof(PerlIOBuf),
2963 PERLIO_K_BUFFERED,
2964 PerlIOBuf_pushed,
2965 PerlIOBase_noop_ok,
2966 PerlIOBuf_open,
2967 NULL,
2968 PerlIOBase_fileno,
2969 PerlIOBuf_read,
2970 PerlIOBuf_unread,
2971 PerlIOBuf_write,
2972 PerlIOBuf_seek,
2973 PerlIOBuf_tell,
2974 PerlIOBuf_close,
2975 PerlIOBuf_flush,
2976 PerlIOBuf_fill,
2977 PerlIOBase_eof,
2978 PerlIOBase_error,
2979 PerlIOBase_clearerr,
2980 PerlIOBase_setlinebuf,
2981 PerlIOBuf_get_base,
2982 PerlIOBuf_bufsiz,
2983 PerlIOBuf_get_ptr,
2984 PerlIOBuf_get_cnt,
2985 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 2986};
2987
66ecd56b 2988/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 2989/*
2990 * Temp layer to hold unread chars when cannot do it any other way
2991 */
5e2ab84b
NIS		 2992
2993IV
2994PerlIOPending_fill(PerlIO *f)
2995{
14a5cf38
JH		 2996 /*
2997 * Should never happen
2998 */
2999 PerlIO_flush(f);
3000 return 0;
5e2ab84b
NIS		 3001}
3002
3003IV
3004PerlIOPending_close(PerlIO *f)
3005{
14a5cf38
JH		 3006 /*
3007 * A tad tricky - flush pops us, then we close new top
3008 */
3009 PerlIO_flush(f);
3010 return PerlIO_close(f);
5e2ab84b
NIS		 3011}
3012
3013IV
3014PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3015{
14a5cf38
JH		 3016 /*
3017 * A tad tricky - flush pops us, then we seek new top
3018 */
3019 PerlIO_flush(f);
3020 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3021}
3022
3023
3024IV
3025PerlIOPending_flush(PerlIO *f)
3026{
14a5cf38
JH		 3027 dTHX;
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3029 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3030 PerlMemShared_free(b->buf);
3031 b->buf = NULL;
3032 }
3033 PerlIO_pop(aTHX_ f);
3034 return 0;
5e2ab84b
NIS		 3035}
3036
3037void
14a5cf38 3038PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3039{
14a5cf38
JH		 3040 if (cnt <= 0) {
3041 PerlIO_flush(f);
3042 }
3043 else {
3044 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3045 }
5e2ab84b
NIS		 3046}
3047
3048IV
14a5cf38 3049PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3050{
14a5cf38
JH		 3051 IV code = PerlIOBase_pushed(f, mode, arg);
3052 PerlIOl *l = PerlIOBase(f);
3053 /*
3054 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3055 * etc. get muddled when it changes mid-string when we auto-pop.
3056 */
3057 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3058 (PerlIOBase(PerlIONext(f))->
3059 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3060 return code;
5e2ab84b
NIS		 3061}
3062
3063SSize_t
3064PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3065{
14a5cf38
JH		 3066 SSize_t avail = PerlIO_get_cnt(f);
3067 SSize_t got = 0;
3068 if (count < avail)
3069 avail = count;
3070 if (avail > 0)
3071 got = PerlIOBuf_read(f, vbuf, avail);
3072 if (got >= 0 && got < count) {
3073 SSize_t more =
3074 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3075 if (more >= 0 || got == 0)
3076 got += more;
3077 }
3078 return got;
5e2ab84b
NIS		 3079}
3080
5e2ab84b 3081PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3082 "pending",
3083 sizeof(PerlIOBuf),
3084 PERLIO_K_BUFFERED,
3085 PerlIOPending_pushed,
3086 PerlIOBase_noop_ok,
3087 NULL,
3088 NULL,
3089 PerlIOBase_fileno,
3090 PerlIOPending_read,
3091 PerlIOBuf_unread,
3092 PerlIOBuf_write,
3093 PerlIOPending_seek,
3094 PerlIOBuf_tell,
3095 PerlIOPending_close,
3096 PerlIOPending_flush,
3097 PerlIOPending_fill,
3098 PerlIOBase_eof,
3099 PerlIOBase_error,
3100 PerlIOBase_clearerr,
3101 PerlIOBase_setlinebuf,
3102 PerlIOBuf_get_base,
3103 PerlIOBuf_bufsiz,
3104 PerlIOBuf_get_ptr,
3105 PerlIOBuf_get_cnt,
3106 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3107};
3108
3109
3110
3111/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3112/*
3113 * crlf - translation On read translate CR,LF to "\n" we do this by
3114 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3115 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3116 */
3117
14a5cf38
JH		 3118typedef struct {
3119 PerlIOBuf base; /* PerlIOBuf stuff */
3120 STDCHAR *nl; /* Position of crlf we "lied" about in the
3121 * buffer */
99efab12
NIS		 3122} PerlIOCrlf;
3123
f5b9d040 3124IV
14a5cf38 3125PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3126{
14a5cf38
JH		 3127 IV code;
3128 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3129 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3130#if 0
14a5cf38
JH		 3131 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3132 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3133 PerlIOBase(f)->flags);
5e2ab84b 3134#endif
14a5cf38 3135 return code;
f5b9d040
NIS		 3136}
3137
3138
99efab12
NIS		 3139SSize_t
3140PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3141{
14a5cf38
JH		 3142 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3143 if (c->nl) {
3144 *(c->nl) = 0xd;
3145 c->nl = NULL;
3146 }
3147 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3148 return PerlIOBuf_unread(f, vbuf, count);
3149 else {
3150 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3151 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3152 SSize_t unread = 0;
3153 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3154 PerlIO_flush(f);
3155 if (!b->buf)
3156 PerlIO_get_base(f);
3157 if (b->buf) {
3158 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3159 b->end = b->ptr = b->buf + b->bufsiz;
3160 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3161 b->posn -= b->bufsiz;
3162 }
3163 while (count > 0 && b->ptr > b->buf) {
3164 int ch = *--buf;
3165 if (ch == '\n') {
3166 if (b->ptr - 2 >= b->buf) {
3167 *--(b->ptr) = 0xa;
3168 *--(b->ptr) = 0xd;
3169 unread++;
3170 count--;
3171 }
3172 else {
3173 buf++;
3174 break;
3175 }
3176 }
3177 else {
3178 *--(b->ptr) = ch;
3179 unread++;
3180 count--;
3181 }
3182 }
3183 }
3184 return unread;
3185 }
99efab12
NIS		 3186}
3187
3188SSize_t
3189PerlIOCrlf_get_cnt(PerlIO *f)
3190{
14a5cf38
JH		 3191 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3192 if (!b->buf)
3193 PerlIO_get_base(f);
3194 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3195 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3196 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3197 STDCHAR *nl = b->ptr;
3198 scan:
3199 while (nl < b->end && *nl != 0xd)
3200 nl++;
3201 if (nl < b->end && *nl == 0xd) {
3202 test:
3203 if (nl + 1 < b->end) {
3204 if (nl[1] == 0xa) {
3205 *nl = '\n';
3206 c->nl = nl;
3207 }
3208 else {
3209 /*
3210 * Not CR,LF but just CR
3211 */
3212 nl++;
3213 goto scan;
3214 }
3215 }
3216 else {
3217 /*
3218 * Blast - found CR as last char in buffer
3219 */
3220 if (b->ptr < nl) {
3221 /*
3222 * They may not care, defer work as long as
3223 * possible
3224 */
3225 return (nl - b->ptr);
3226 }
3227 else {
3228 int code;
3229 b->ptr++; /* say we have read it as far as
3230 * flush() is concerned */
3231 b->buf++; /* Leave space an front of buffer */
3232 b->bufsiz--; /* Buffer is thus smaller */
3233 code = PerlIO_fill(f); /* Fetch some more */
3234 b->bufsiz++; /* Restore size for next time */
3235 b->buf--; /* Point at space */
3236 b->ptr = nl = b->buf; /* Which is what we hand
3237 * off */
3238 b->posn--; /* Buffer starts here */
3239 *nl = 0xd; /* Fill in the CR */
3240 if (code == 0)
3241 goto test; /* fill() call worked */
3242 /*
3243 * CR at EOF - just fall through
3244 */
3245 }
3246 }
3247 }
3248 }
3249 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3250 }
3251 return 0;
99efab12
NIS		 3252}
3253
3254void
14a5cf38
JH		 3255PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3256{
3257 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3258 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3259 IV flags = PerlIOBase(f)->flags;
3260 if (!b->buf)
3261 PerlIO_get_base(f);
3262 if (!ptr) {
3263 if (c->nl)
3264 ptr = c->nl + 1;
3265 else {
3266 ptr = b->end;
3267 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3268 ptr--;
3269 }
3270 ptr -= cnt;
3271 }
3272 else {
3273 /*
3274 * Test code - delete when it works ...
3275 */
3276 STDCHAR *chk;
3277 if (c->nl)
3278 chk = c->nl + 1;
3279 else {
3280 chk = b->end;
3281 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3282 chk--;
3283 }
3284 chk -= cnt;
3285
3286 if (ptr != chk) {
3287 dTHX;
3288 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3289 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3290 b->end, cnt);
3291 }
3292 }
3293 if (c->nl) {
3294 if (ptr > c->nl) {
3295 /*
3296 * They have taken what we lied about
3297 */
3298 *(c->nl) = 0xd;
3299 c->nl = NULL;
3300 ptr++;
3301 }
3302 }
3303 b->ptr = ptr;
3304 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3305}
3306
3307SSize_t
3308PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3309{
14a5cf38
JH		 3310 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3311 return PerlIOBuf_write(f, vbuf, count);
3312 else {
3313 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3314 const STDCHAR *buf = (const STDCHAR *) vbuf;
3315 const STDCHAR *ebuf = buf + count;
3316 if (!b->buf)
3317 PerlIO_get_base(f);
3318 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3319 return 0;
3320 while (buf < ebuf) {
3321 STDCHAR *eptr = b->buf + b->bufsiz;
3322 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3323 while (buf < ebuf && b->ptr < eptr) {
3324 if (*buf == '\n') {
3325 if ((b->ptr + 2) > eptr) {
3326 /*
3327 * Not room for both
3328 */
3329 PerlIO_flush(f);
3330 break;
3331 }
3332 else {
3333 *(b->ptr)++ = 0xd; /* CR */
3334 *(b->ptr)++ = 0xa; /* LF */
3335 buf++;
3336 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3337 PerlIO_flush(f);
3338 break;
3339 }
3340 }
3341 }
3342 else {
3343 int ch = *buf++;
3344 *(b->ptr)++ = ch;
3345 }
3346 if (b->ptr >= eptr) {
3347 PerlIO_flush(f);
3348 break;
3349 }
3350 }
3351 }
3352 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3353 PerlIO_flush(f);
3354 return (buf - (STDCHAR *) vbuf);
3355 }
99efab12
NIS		 3356}
3357
3358IV
3359PerlIOCrlf_flush(PerlIO *f)
3360{
14a5cf38
JH		 3361 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3362 if (c->nl) {
3363 *(c->nl) = 0xd;
3364 c->nl = NULL;
3365 }
3366 return PerlIOBuf_flush(f);
99efab12
NIS		 3367}
3368
66ecd56b 3369PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3370 "crlf",
3371 sizeof(PerlIOCrlf),
3372 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3373 PerlIOCrlf_pushed,
3374 PerlIOBase_noop_ok, /* popped */
3375 PerlIOBuf_open,
3376 NULL,
3377 PerlIOBase_fileno,
3378 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3379 * ... */
3380 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3381 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3382 PerlIOBuf_seek,
3383 PerlIOBuf_tell,
3384 PerlIOBuf_close,
3385 PerlIOCrlf_flush,
3386 PerlIOBuf_fill,
3387 PerlIOBase_eof,
3388 PerlIOBase_error,
3389 PerlIOBase_clearerr,
3390 PerlIOBase_setlinebuf,
3391 PerlIOBuf_get_base,
3392 PerlIOBuf_bufsiz,
3393 PerlIOBuf_get_ptr,
3394 PerlIOCrlf_get_cnt,
3395 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3396};
3397
06da4f11
NIS		 3398#ifdef HAS_MMAP
3399/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3400/*
3401 * mmap as "buffer" layer
3402 */
06da4f11 3403
14a5cf38
JH		 3404typedef struct {
3405 PerlIOBuf base; /* PerlIOBuf stuff */
3406 Mmap_t mptr; /* Mapped address */
3407 Size_t len; /* mapped length */
3408 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3409} PerlIOMmap;
3410
c3d7c7c9
NIS		 3411static size_t page_size = 0;
3412
06da4f11
NIS		 3413IV
3414PerlIOMmap_map(PerlIO *f)
3415{
14a5cf38
JH		 3416 dTHX;
3417 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3418 IV flags = PerlIOBase(f)->flags;
3419 IV code = 0;
3420 if (m->len)
3421 abort();
3422 if (flags & PERLIO_F_CANREAD) {
3423 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3424 int fd = PerlIO_fileno(f);
3425 struct stat st;
3426 code = fstat(fd, &st);
3427 if (code == 0 && S_ISREG(st.st_mode)) {
3428 SSize_t len = st.st_size - b->posn;
3429 if (len > 0) {
3430 Off_t posn;
3431 if (!page_size) {
68d873c6 3432#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3433 {
3434 SETERRNO(0, SS$_NORMAL);
68d873c6 3435# ifdef _SC_PAGESIZE
14a5cf38 3436 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3437# else
14a5cf38 3438 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3439# endif
14a5cf38
JH		 3440 if ((long) page_size < 0) {
3441 if (errno) {
3442 SV *error = ERRSV;
3443 char *msg;
3444 STRLEN n_a;
3445 (void) SvUPGRADE(error, SVt_PV);
3446 msg = SvPVx(error, n_a);
3447 Perl_croak(aTHX_ "panic: sysconf: %s",
3448 msg);
3449 }
3450 else
3451 Perl_croak(aTHX_
3452 "panic: sysconf: pagesize unknown");
3453 }
3454 }
68d873c6
JH		 3455#else
3456# ifdef HAS_GETPAGESIZE
14a5cf38 3457 page_size = getpagesize();
68d873c6
JH		 3458# else
3459# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3460 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3461# endif
3462# endif
3463#endif
14a5cf38
JH		 3464 if ((IV) page_size <= 0)
3465 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3466 (IV) page_size);
3467 }
3468 if (b->posn < 0) {
3469 /*
3470 * This is a hack - should never happen - open should
3471 * have set it !
3472 */
3473 b->posn = PerlIO_tell(PerlIONext(f));
3474 }
3475 posn = (b->posn / page_size) * page_size;
3476 len = st.st_size - posn;
3477 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3478 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3479#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3480 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3481#endif
a5262162 3482#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3483 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3484#endif
14a5cf38
JH		 3485 PerlIOBase(f)->flags =
3486 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3487 b->end = ((STDCHAR *) m->mptr) + len;
3488 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3489 b->ptr = b->buf;
3490 m->len = len;
3491 }
3492 else {
3493 b->buf = NULL;
3494 }
3495 }
3496 else {
3497 PerlIOBase(f)->flags =
3498 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3499 b->buf = NULL;
3500 b->ptr = b->end = b->ptr;
3501 code = -1;
3502 }
3503 }
3504 }
3505 return code;
06da4f11
NIS		 3506}
3507
3508IV
3509PerlIOMmap_unmap(PerlIO *f)
3510{
14a5cf38
JH		 3511 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3512 PerlIOBuf *b = &m->base;
3513 IV code = 0;
3514 if (m->len) {
3515 if (b->buf) {
3516 code = munmap(m->mptr, m->len);
3517 b->buf = NULL;
3518 m->len = 0;
3519 m->mptr = NULL;
3520 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3521 code = -1;
3522 }
3523 b->ptr = b->end = b->buf;
3524 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3525 }
3526 return code;
06da4f11
NIS		 3527}
3528
3529STDCHAR *
3530PerlIOMmap_get_base(PerlIO *f)
3531{
14a5cf38
JH		 3532 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3533 PerlIOBuf *b = &m->base;
3534 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3535 /*
3536 * Already have a readbuffer in progress
3537 */
3538 return b->buf;
3539 }
3540 if (b->buf) {
3541 /*
3542 * We have a write buffer or flushed PerlIOBuf read buffer
3543 */
3544 m->bbuf = b->buf; /* save it in case we need it again */
3545 b->buf = NULL; /* Clear to trigger below */
3546 }
3547 if (!b->buf) {
3548 PerlIOMmap_map(f); /* Try and map it */
3549 if (!b->buf) {
3550 /*
3551 * Map did not work - recover PerlIOBuf buffer if we have one
3552 */
3553 b->buf = m->bbuf;
3554 }
3555 }
3556 b->ptr = b->end = b->buf;
3557 if (b->buf)
3558 return b->buf;
3559 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3560}
3561
3562SSize_t
3563PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3564{
14a5cf38
JH		 3565 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3566 PerlIOBuf *b = &m->base;
3567 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3568 PerlIO_flush(f);
3569 if (b->ptr && (b->ptr - count) >= b->buf
3570 && memEQ(b->ptr - count, vbuf, count)) {
3571 b->ptr -= count;
3572 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3573 return count;
3574 }
3575 if (m->len) {
3576 /*
3577 * Loose the unwritable mapped buffer
3578 */
3579 PerlIO_flush(f);
3580 /*
3581 * If flush took the "buffer" see if we have one from before
3582 */
3583 if (!b->buf && m->bbuf)
3584 b->buf = m->bbuf;
3585 if (!b->buf) {
3586 PerlIOBuf_get_base(f);
3587 m->bbuf = b->buf;
3588 }
3589 }
3590 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3591}
3592
3593SSize_t
3594PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3595{
14a5cf38
JH		 3596 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3597 PerlIOBuf *b = &m->base;
3598 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3599 /*
3600 * No, or wrong sort of, buffer
3601 */
3602 if (m->len) {
3603 if (PerlIOMmap_unmap(f) != 0)
3604 return 0;
3605 }
3606 /*
3607 * If unmap took the "buffer" see if we have one from before
3608 */
3609 if (!b->buf && m->bbuf)
3610 b->buf = m->bbuf;
3611 if (!b->buf) {
3612 PerlIOBuf_get_base(f);
3613 m->bbuf = b->buf;
3614 }
06da4f11 3615 }
14a5cf38 3616 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3617}
3618
3619IV
3620PerlIOMmap_flush(PerlIO *f)
3621{
14a5cf38
JH		 3622 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3623 PerlIOBuf *b = &m->base;
3624 IV code = PerlIOBuf_flush(f);
3625 /*
3626 * Now we are "synced" at PerlIOBuf level
3627 */
3628 if (b->buf) {
3629 if (m->len) {
3630 /*
3631 * Unmap the buffer
3632 */
3633 if (PerlIOMmap_unmap(f) != 0)
3634 code = -1;
3635 }
3636 else {
3637 /*
3638 * We seem to have a PerlIOBuf buffer which was not mapped
3639 * remember it in case we need one later
3640 */
3641 m->bbuf = b->buf;
3642 }
3643 }
3644 return code;
06da4f11
NIS		 3645}
3646
3647IV
3648PerlIOMmap_fill(PerlIO *f)
3649{
14a5cf38
JH		 3650 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3651 IV code = PerlIO_flush(f);
3652 if (code == 0 && !b->buf) {
3653 code = PerlIOMmap_map(f);
3654 }
3655 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3656 code = PerlIOBuf_fill(f);
3657 }
3658 return code;
06da4f11
NIS		 3659}
3660
3661IV
3662PerlIOMmap_close(PerlIO *f)
3663{
14a5cf38
JH		 3664 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3665 PerlIOBuf *b = &m->base;
3666 IV code = PerlIO_flush(f);
3667 if (m->bbuf) {
3668 b->buf = m->bbuf;
3669 m->bbuf = NULL;
3670 b->ptr = b->end = b->buf;
3671 }
3672 if (PerlIOBuf_close(f) != 0)
3673 code = -1;
3674 return code;
06da4f11
NIS		 3675}
3676
3677
3678PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3679 "mmap",
3680 sizeof(PerlIOMmap),
3681 PERLIO_K_BUFFERED,
3682 PerlIOBuf_pushed,
3683 PerlIOBase_noop_ok,
3684 PerlIOBuf_open,
3685 NULL,
3686 PerlIOBase_fileno,
3687 PerlIOBuf_read,
3688 PerlIOMmap_unread,
3689 PerlIOMmap_write,
3690 PerlIOBuf_seek,
3691 PerlIOBuf_tell,
3692 PerlIOBuf_close,
3693 PerlIOMmap_flush,
3694 PerlIOMmap_fill,
3695 PerlIOBase_eof,
3696 PerlIOBase_error,
3697 PerlIOBase_clearerr,
3698 PerlIOBase_setlinebuf,
3699 PerlIOMmap_get_base,
3700 PerlIOBuf_bufsiz,
3701 PerlIOBuf_get_ptr,
3702 PerlIOBuf_get_cnt,
3703 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3704};
3705
14a5cf38 3706#endif /* HAS_MMAP */
06da4f11 3707
9e353e3b
NIS		 3708void
3709PerlIO_init(void)
760ac839 3710{
14a5cf38 3711 dTHX;
43c11ae3 3712#ifndef WIN32
14a5cf38 3713 call_atexit(PerlIO_cleanup_layers, NULL);
43c11ae3 3714#endif
14a5cf38 3715 if (!_perlio) {
be696b0a 3716#ifndef WIN32
14a5cf38 3717 atexit(&PerlIO_cleanup);
be696b0a 3718#endif
14a5cf38 3719 }
760ac839
LW		 3720}
3721
9e353e3b
NIS		 3722#undef PerlIO_stdin
3723PerlIO *
3724PerlIO_stdin(void)
3725{
14a5cf38
JH		 3726 if (!_perlio) {
3727 dTHX;
3728 PerlIO_stdstreams(aTHX);
3729 }
3730 return &_perlio[1];
9e353e3b
NIS		 3731}
3732
3733#undef PerlIO_stdout
3734PerlIO *
3735PerlIO_stdout(void)
3736{
14a5cf38
JH		 3737 if (!_perlio) {
3738 dTHX;
3739 PerlIO_stdstreams(aTHX);
3740 }
3741 return &_perlio[2];
9e353e3b
NIS		 3742}
3743
3744#undef PerlIO_stderr
3745PerlIO *
3746PerlIO_stderr(void)
3747{
14a5cf38
JH		 3748 if (!_perlio) {
3749 dTHX;
3750 PerlIO_stdstreams(aTHX);
3751 }
3752 return &_perlio[3];
9e353e3b
NIS		 3753}
3754
3755/*--------------------------------------------------------------------------------------*/
3756
3757#undef PerlIO_getname
3758char *
3759PerlIO_getname(PerlIO *f, char *buf)
3760{
14a5cf38
JH		 3761 dTHX;
3762 char *name = NULL;
a15cef0c 3763#ifdef VMS
14a5cf38
JH		 3764 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3765 if (stdio)
3766 name = fgetname(stdio, buf);
a15cef0c 3767#else
14a5cf38 3768 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 3769#endif
14a5cf38 3770 return name;
9e353e3b
NIS		 3771}
3772
3773
3774/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3775/*
3776 * Functions which can be called on any kind of PerlIO implemented in
3777 * terms of above
3778 */
9e353e3b
NIS		 3779
3780#undef PerlIO_getc
6f9d8c32 3781int
9e353e3b 3782PerlIO_getc(PerlIO *f)
760ac839 3783{
14a5cf38
JH		 3784 STDCHAR buf[1];
3785 SSize_t count = PerlIO_read(f, buf, 1);
3786 if (count == 1) {
3787 return (unsigned char) buf[0];
3788 }
3789 return EOF;
313ca112
NIS		 3790}
3791
3792#undef PerlIO_ungetc
3793int
3794PerlIO_ungetc(PerlIO *f, int ch)
3795{
14a5cf38
JH		 3796 if (ch != EOF) {
3797 STDCHAR buf = ch;
3798 if (PerlIO_unread(f, &buf, 1) == 1)
3799 return ch;
3800 }
3801 return EOF;
760ac839
LW		 3802}
3803
9e353e3b
NIS		 3804#undef PerlIO_putc
3805int
3806PerlIO_putc(PerlIO *f, int ch)
760ac839 3807{
14a5cf38
JH		 3808 STDCHAR buf = ch;
3809 return PerlIO_write(f, &buf, 1);
760ac839
LW		 3810}
3811
9e353e3b 3812#undef PerlIO_puts
760ac839 3813int
9e353e3b 3814PerlIO_puts(PerlIO *f, const char *s)
760ac839 3815{
14a5cf38
JH		 3816 STRLEN len = strlen(s);
3817 return PerlIO_write(f, s, len);
760ac839
LW		 3818}
3819
3820#undef PerlIO_rewind
3821void
c78749f2 3822PerlIO_rewind(PerlIO *f)
760ac839 3823{
14a5cf38
JH		 3824 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3825 PerlIO_clearerr(f);
6f9d8c32
NIS		 3826}
3827
3828#undef PerlIO_vprintf
3829int
3830PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3831{
14a5cf38
JH		 3832 dTHX;
3833 SV *sv = newSVpvn("", 0);
3834 char *s;
3835 STRLEN len;
3836 SSize_t wrote;
2cc61e15 3837#ifdef NEED_VA_COPY
14a5cf38
JH		 3838 va_list apc;
3839 Perl_va_copy(ap, apc);
3840 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 3841#else
14a5cf38 3842 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 3843#endif
14a5cf38
JH		 3844 s = SvPV(sv, len);
3845 wrote = PerlIO_write(f, s, len);
3846 SvREFCNT_dec(sv);
3847 return wrote;
760ac839
LW		 3848}
3849
3850#undef PerlIO_printf
6f9d8c32 3851int
14a5cf38 3852PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 3853{
14a5cf38
JH		 3854 va_list ap;
3855 int result;
3856 va_start(ap, fmt);
3857 result = PerlIO_vprintf(f, fmt, ap);
3858 va_end(ap);
3859 return result;
760ac839
LW		 3860}
3861
3862#undef PerlIO_stdoutf
6f9d8c32 3863int
14a5cf38 3864PerlIO_stdoutf(const char *fmt, ...)
760ac839 3865{
14a5cf38
JH		 3866 va_list ap;
3867 int result;
3868 va_start(ap, fmt);
3869 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3870 va_end(ap);
3871 return result;
760ac839
LW		 3872}
3873
3874#undef PerlIO_tmpfile
3875PerlIO *
c78749f2 3876PerlIO_tmpfile(void)
760ac839 3877{
14a5cf38
JH		 3878 /*
3879 * I have no idea how portable mkstemp() is ...
3880 */
83b075c3 3881#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 3882 dTHX;
3883 PerlIO *f = NULL;
3884 FILE *stdio = PerlSIO_tmpfile();
3885 if (stdio) {
3886 PerlIOStdio *s =
3887 PerlIOSelf(PerlIO_push
3888 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3889 "w+", Nullsv), PerlIOStdio);
3890 s->stdio = stdio;
3891 }
3892 return f;
83b075c3 3893#else
14a5cf38
JH		 3894 dTHX;
3895 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
3896 int fd = mkstemp(SvPVX(sv));
3897 PerlIO *f = NULL;
3898 if (fd >= 0) {
3899 f = PerlIO_fdopen(fd, "w+");
3900 if (f) {
3901 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
3902 }
3903 PerlLIO_unlink(SvPVX(sv));
3904 SvREFCNT_dec(sv);
3905 }
3906 return f;
83b075c3 3907#endif
760ac839
LW		 3908}
3909
6f9d8c32
NIS		 3910#undef HAS_FSETPOS
3911#undef HAS_FGETPOS
3912
14a5cf38
JH		 3913#endif /* USE_SFIO */
3914#endif /* PERLIO_IS_STDIO */
760ac839 3915
9e353e3b 3916/*======================================================================================*/
14a5cf38
JH		 3917/*
3918 * Now some functions in terms of above which may be needed even if we are
3919 * not in true PerlIO mode
9e353e3b
NIS		 3920 */
3921
760ac839
LW		 3922#ifndef HAS_FSETPOS
3923#undef PerlIO_setpos
3924int
766a733e 3925PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 3926{
14a5cf38
JH		 3927 dTHX;
3928 if (SvOK(pos)) {
3929 STRLEN len;
3930 Off_t *posn = (Off_t *) SvPV(pos, len);
3931 if (f && len == sizeof(Off_t))
3932 return PerlIO_seek(f, *posn, SEEK_SET);
3933 }
3934 SETERRNO(EINVAL, SS$_IVCHAN);
3935 return -1;
760ac839 3936}
c411622e 3937#else
c411622e 3938#undef PerlIO_setpos
3939int
766a733e 3940PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 3941{
14a5cf38
JH		 3942 dTHX;
3943 if (SvOK(pos)) {
3944 STRLEN len;
3945 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
3946 if (f && len == sizeof(Fpos_t)) {
2d4389e4 3947#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 3948 return fsetpos64(f, fpos);
d9b3e12d 3949#else
14a5cf38 3950 return fsetpos(f, fpos);
d9b3e12d 3951#endif
14a5cf38 3952 }
766a733e 3953 }
14a5cf38
JH		 3954 SETERRNO(EINVAL, SS$_IVCHAN);
3955 return -1;
c411622e 3956}
3957#endif
760ac839
LW		 3958
3959#ifndef HAS_FGETPOS
3960#undef PerlIO_getpos
3961int
766a733e 3962PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 3963{
14a5cf38
JH		 3964 dTHX;
3965 Off_t posn = PerlIO_tell(f);
3966 sv_setpvn(pos, (char *) &posn, sizeof(posn));
3967 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 3968}
c411622e 3969#else
c411622e 3970#undef PerlIO_getpos
3971int
766a733e 3972PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 3973{
14a5cf38
JH		 3974 dTHX;
3975 Fpos_t fpos;
3976 int code;
2d4389e4 3977#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 3978 code = fgetpos64(f, &fpos);
d9b3e12d 3979#else
14a5cf38 3980 code = fgetpos(f, &fpos);
d9b3e12d 3981#endif
14a5cf38
JH		 3982 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
3983 return code;
c411622e 3984}
3985#endif
760ac839
LW		 3986
3987#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
3988
3989int
c78749f2 3990vprintf(char *pat, char *args)
662a7e3f
CS		 3991{
3992 _doprnt(pat, args, stdout);
14a5cf38
JH		 3993 return 0; /* wrong, but perl doesn't use the return
3994 * value */
662a7e3f
CS		 3995}
3996
3997int
c78749f2 3998vfprintf(FILE *fd, char *pat, char *args)
760ac839
LW		 3999{
4000 _doprnt(pat, args, fd);
14a5cf38
JH		 4001 return 0; /* wrong, but perl doesn't use the return
4002 * value */
760ac839
LW		 4003}
4004
4005#endif
4006
4007#ifndef PerlIO_vsprintf
6f9d8c32 4008int
8ac85365 4009PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
760ac839 4010{
14a5cf38
JH		 4011 int val = vsprintf(s, fmt, ap);
4012 if (n >= 0) {
4013 if (strlen(s) >= (STRLEN) n) {
4014 dTHX;
4015 (void) PerlIO_puts(Perl_error_log,
4016 "panic: sprintf overflow - memory corrupted!\n");
4017 my_exit(1);
4018 }
760ac839 4019 }
14a5cf38 4020 return val;
760ac839
LW		 4021}
4022#endif
4023
4024#ifndef PerlIO_sprintf
6f9d8c32 4025int
14a5cf38 4026PerlIO_sprintf(char *s, int n, const char *fmt, ...)
760ac839 4027{
14a5cf38
JH		 4028 va_list ap;
4029 int result;
4030 va_start(ap, fmt);
4031 result = PerlIO_vsprintf(s, n, fmt, ap);
4032 va_end(ap);
4033 return result;
760ac839
LW		 4034}
4035#endif
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