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When USE_ITHREADS avoid SV * in PerlIO_debug, at risk of buffer
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
71200d45 2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW		 5 */
6
14a5cf38 7/*
71200d45 8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 9 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 10 * Invent a dSYS macro to abstract this out
14a5cf38 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 27/*
71200d45 28 * #define PerlIO FILE
14a5cf38 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 51 /*
71200d45 52 * This used to be contents of do_binmode in doio.c
14a5cf38 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 72 /*
71200d45 73 * The translation mode of the stream is maintained independent of
14a5cf38 74 * the translation mode of the fd in the Borland RTL (heavy
71200d45 75 * digging through their runtime sources reveal). User has to set
14a5cf38 76 * the mode explicitly for the stream (though they don't document
71200d45 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 /*
71200d45 111 * NOTREACHED
14a5cf38
JH		 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 131/*
71200d45 132 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 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
71200d45 193 * binary. That allows this file to force inclusion of other functions
14a5cf38 194 * that may be required by loadable extensions e.g. for
71200d45 195 * FileHandle::tmpfile
14a5cf38 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
71200d45 215 * libsfio.a
14a5cf38 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
71200d45 231 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 232 */
760ac839 233
14a5cf38 234 /*
71200d45 235 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 236 * results in a lot of lseek()s to regular files and lot of small
71200d45 237 * writes to pipes.
14a5cf38
JH		 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 266/*
71200d45 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
71200d45 274 * files
14a5cf38 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;
70ace5da
NIS		 303#ifdef USE_ITHREADS
304 /* Use fixed buffer as sv_catpvf etc. needs SVs */
305 char buffer[1024];
306 char *s;
307 STRLEN len;
308 s = CopFILE(PL_curcop);
309 if (!s)
310 s = "(none)";
311 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
312 len = strlen(buffer);
313 vsprintf(buffer+len, fmt, ap);
314 PerlLIO_write(dbg, buffer, strlen(buffer));
315#else
14a5cf38
JH		 316 SV *sv = newSVpvn("", 0);
317 char *s;
318 STRLEN len;
319 s = CopFILE(PL_curcop);
320 if (!s)
321 s = "(none)";
322 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
323 (IV) CopLINE(PL_curcop));
324 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
325
326 s = SvPV(sv, len);
327 PerlLIO_write(dbg, s, len);
328 SvREFCNT_dec(sv);
70ace5da 329#endif
14a5cf38
JH		 330 }
331 va_end(ap);
6f9d8c32
NIS		 332}
333
9e353e3b
NIS		 334/*--------------------------------------------------------------------------------------*/
335
14a5cf38 336/*
71200d45 337 * Inner level routines
14a5cf38 338 */
9e353e3b 339
14a5cf38 340/*
71200d45 341 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38
JH		 342 */
343PerlIO *_perlio = NULL;
05d1247b 344#define PERLIO_TABLE_SIZE 64
6f9d8c32 345
e3f3bf95
NIS		 346
347
760ac839 348PerlIO *
5f1a76d0 349PerlIO_allocate(pTHX)
6f9d8c32 350{
14a5cf38 351 /*
71200d45 352 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 353 */
354 PerlIO **last;
355 PerlIO *f;
356 last = &_perlio;
357 while ((f = *last)) {
358 int i;
359 last = (PerlIO **) (f);
360 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
361 if (!*++f) {
362 return f;
363 }
364 }
365 }
366 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
367 if (!f) {
368 return NULL;
369 }
370 *last = f;
371 return f + 1;
05d1247b
NIS		 372}
373
374void
5f1a76d0 375PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 376{
14a5cf38
JH		 377 PerlIO *table = *tablep;
378 if (table) {
379 int i;
380 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
381 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
382 PerlIO *f = table + i;
383 if (*f) {
384 PerlIO_close(f);
385 }
386 }
387 PerlMemShared_free(table);
388 *tablep = NULL;
05d1247b 389 }
05d1247b
NIS		 390}
391
fcf2db38
NIS		 392PerlIO_list_t *PerlIO_known_layers;
393PerlIO_list_t *PerlIO_def_layerlist;
394
395PerlIO_list_t *
396PerlIO_list_alloc(void)
397{
14a5cf38
JH		 398 PerlIO_list_t *list;
399 Newz('L', list, 1, PerlIO_list_t);
400 list->refcnt = 1;
401 return list;
fcf2db38
NIS		 402}
403
404void
405PerlIO_list_free(PerlIO_list_t *list)
406{
14a5cf38
JH		 407 if (list) {
408 if (--list->refcnt == 0) {
409 if (list->array) {
410 dTHX;
411 IV i;
412 for (i = 0; i < list->cur; i++) {
413 if (list->array[i].arg)
414 SvREFCNT_dec(list->array[i].arg);
415 }
416 Safefree(list->array);
417 }
418 Safefree(list);
419 }
420 }
fcf2db38
NIS		 421}
422
423void
14a5cf38
JH		 424PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
425{
426 dTHX;
427 PerlIO_pair_t *p;
428 if (list->cur >= list->len) {
429 list->len += 8;
430 if (list->array)
431 Renew(list->array, list->len, PerlIO_pair_t);
432 else
433 New('l', list->array, list->len, PerlIO_pair_t);
434 }
435 p = &(list->array[list->cur++]);
436 p->funcs = funcs;
437 if ((p->arg = arg)) {
438 SvREFCNT_inc(arg);
439 }
fcf2db38
NIS		 440}
441
4a4a6116 442
05d1247b 443void
acfe0abc 444PerlIO_cleanup_layers(pTHX_ void *data)
9a6404c5 445{
fcf2db38 446#if 0
14a5cf38
JH		 447 PerlIO_known_layers = Nullhv;
448 PerlIO_def_layerlist = Nullav;
fcf2db38 449#endif
9a6404c5
DM		 450}
451
452void
5f1a76d0 453PerlIO_cleanup()
05d1247b 454{
14a5cf38
JH		 455 dTHX;
456 PerlIO_cleantable(aTHX_ & _perlio);
6f9d8c32
NIS		 457}
458
9e353e3b 459void
13621cfb
NIS		 460PerlIO_destruct(pTHX)
461{
14a5cf38
JH		 462 PerlIO **table = &_perlio;
463 PerlIO *f;
464 while ((f = *table)) {
465 int i;
466 table = (PerlIO **) (f++);
467 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
468 PerlIO *x = f;
469 PerlIOl *l;
470 while ((l = *x)) {
471 if (l->tab->kind & PERLIO_K_DESTRUCT) {
472 PerlIO_debug("Destruct popping %s\n", l->tab->name);
473 PerlIO_flush(x);
474 PerlIO_pop(aTHX_ x);
475 }
476 else {
477 x = PerlIONext(x);
478 }
479 }
480 f++;
481 }
482 }
13621cfb
NIS		 483}
484
485void
a999f61b 486PerlIO_pop(pTHX_ PerlIO *f)
760ac839 487{
14a5cf38
JH		 488 PerlIOl *l = *f;
489 if (l) {
490 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
491 if (l->tab->Popped) {
492 /*
493 * If popped returns non-zero do not free its layer structure
494 * it has either done so itself, or it is shared and still in
71200d45 495 * use
14a5cf38
JH		 496 */
497 if ((*l->tab->Popped) (f) != 0)
498 return;
499 }
500 *f = l->next;;
501 PerlMemShared_free(l);
a8c08ecd 502 }
6f9d8c32
NIS		 503}
504
9e353e3b 505/*--------------------------------------------------------------------------------------*/
14a5cf38 506/*
71200d45 507 * XS Interface for perl code
14a5cf38 508 */
9e353e3b 509
fcf2db38 510PerlIO_funcs *
2edd7e44 511PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 512{
14a5cf38
JH		 513 IV i;
514 if ((SSize_t) len <= 0)
515 len = strlen(name);
516 for (i = 0; i < PerlIO_known_layers->cur; i++) {
517 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
518 if (memEQ(f->name, name, len)) {
519 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
520 return f;
521 }
522 }
523 if (load && PL_subname && PerlIO_def_layerlist
524 && PerlIO_def_layerlist->cur >= 2) {
525 SV *pkgsv = newSVpvn("PerlIO", 6);
526 SV *layer = newSVpvn(name, len);
527 ENTER;
528 /*
71200d45 529 * The two SVs are magically freed by load_module
14a5cf38
JH		 530 */
531 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
532 LEAVE;
533 return PerlIO_find_layer(aTHX_ name, len, 0);
534 }
535 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
536 return NULL;
f3862f8b
NIS		 537}
538
2a1bc955 539#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 540
541static int
542perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
543{
14a5cf38
JH		 544 if (SvROK(sv)) {
545 IO *io = GvIOn((GV *) SvRV(sv));
546 PerlIO *ifp = IoIFP(io);
547 PerlIO *ofp = IoOFP(io);
548 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
549 }
550 return 0;
b13b2135
NIS		 551}
552
553static int
554perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
555{
14a5cf38
JH		 556 if (SvROK(sv)) {
557 IO *io = GvIOn((GV *) SvRV(sv));
558 PerlIO *ifp = IoIFP(io);
559 PerlIO *ofp = IoOFP(io);
560 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
561 }
562 return 0;
b13b2135
NIS		 563}
564
565static int
566perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
567{
14a5cf38
JH		 568 Perl_warn(aTHX_ "clear %" SVf, sv);
569 return 0;
b13b2135
NIS		 570}
571
572static int
573perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
574{
14a5cf38
JH		 575 Perl_warn(aTHX_ "free %" SVf, sv);
576 return 0;
b13b2135
NIS		 577}
578
579MGVTBL perlio_vtab = {
14a5cf38
JH		 580 perlio_mg_get,
581 perlio_mg_set,
582 NULL, /* len */
583 perlio_mg_clear,
584 perlio_mg_free
b13b2135
NIS		 585};
586
587XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
588{
14a5cf38
JH		 589 dXSARGS;
590 SV *sv = SvRV(ST(1));
591 AV *av = newAV();
592 MAGIC *mg;
593 int count = 0;
594 int i;
595 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
596 SvRMAGICAL_off(sv);
597 mg = mg_find(sv, PERL_MAGIC_ext);
598 mg->mg_virtual = &perlio_vtab;
599 mg_magical(sv);
600 Perl_warn(aTHX_ "attrib %" SVf, sv);
601 for (i = 2; i < items; i++) {
602 STRLEN len;
603 const char *name = SvPV(ST(i), len);
604 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
605 if (layer) {
606 av_push(av, SvREFCNT_inc(layer));
607 }
608 else {
609 ST(count) = ST(i);
610 count++;
611 }
612 }
613 SvREFCNT_dec(av);
614 XSRETURN(count);
615}
616
617#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 618
e3f3bf95
NIS		 619SV *
620PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 621{
14a5cf38
JH		 622 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
623 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
624 return sv;
e3f3bf95
NIS		 625}
626
0c4f7ff0
NIS		 627XS(XS_PerlIO__Layer__find)
628{
14a5cf38
JH		 629 dXSARGS;
630 if (items < 2)
631 Perl_croak(aTHX_ "Usage class->find(name[,load])");
632 else {
633 STRLEN len = 0;
634 char *name = SvPV(ST(1), len);
635 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
636 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
637 ST(0) =
638 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
639 &PL_sv_undef;
640 XSRETURN(1);
641 }
0c4f7ff0
NIS		 642}
643
e3f3bf95
NIS		 644void
645PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
646{
14a5cf38
JH		 647 if (!PerlIO_known_layers)
648 PerlIO_known_layers = PerlIO_list_alloc();
649 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
650 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 651}
652
1141d9f8 653int
fcf2db38 654PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 655{
14a5cf38
JH		 656 if (names) {
657 const char *s = names;
658 while (*s) {
659 while (isSPACE(*s) || *s == ':')
660 s++;
661 if (*s) {
662 STRLEN llen = 0;
663 const char *e = s;
664 const char *as = Nullch;
665 STRLEN alen = 0;
666 if (!isIDFIRST(*s)) {
667 /*
668 * Message is consistent with how attribute lists are
669 * passed. Even though this means "foo : : bar" is
71200d45 670 * seen as an invalid separator character.
14a5cf38
JH		 671 */
672 char q = ((*s == '\'') ? '"' : '\'');
673 Perl_warn(aTHX_
674 "perlio: invalid separator character %c%c%c in layer specification list",
675 q, *s, q);
676 return -1;
677 }
678 do {
679 e++;
680 } while (isALNUM(*e));
681 llen = e - s;
682 if (*e == '(') {
683 int nesting = 1;
684 as = ++e;
685 while (nesting) {
686 switch (*e++) {
687 case ')':
688 if (--nesting == 0)
689 alen = (e - 1) - as;
690 break;
691 case '(':
692 ++nesting;
693 break;
694 case '\\':
695 /*
696 * It's a nul terminated string, not allowed
697 * to \ the terminating null. Anything other
71200d45 698 * character is passed over.
14a5cf38
JH		 699 */
700 if (*e++) {
701 break;
702 }
703 /*
71200d45 704 * Drop through
14a5cf38
JH		 705 */
706 case '\0':
707 e--;
708 Perl_warn(aTHX_
709 "perlio: argument list not closed for layer \"%.*s\"",
710 (int) (e - s), s);
711 return -1;
712 default:
713 /*
71200d45 714 * boring.
14a5cf38
JH		 715 */
716 break;
717 }
718 }
719 }
720 if (e > s) {
721 PerlIO_funcs *layer =
722 PerlIO_find_layer(aTHX_ s, llen, 1);
723 if (layer) {
724 PerlIO_list_push(av, layer,
725 (as) ? newSVpvn(as,
726 alen) :
727 &PL_sv_undef);
728 }
729 else {
730 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
731 (int) llen, s);
732 return -1;
733 }
734 }
735 s = e;
736 }
737 }
738 }
739 return 0;
1141d9f8
NIS		 740}
741
dfebf958 742void
fcf2db38 743PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 744{
14a5cf38
JH		 745 PerlIO_funcs *tab = &PerlIO_perlio;
746 if (O_BINARY != O_TEXT) {
747 tab = &PerlIO_crlf;
748 }
749 else {
750 if (PerlIO_stdio.Set_ptrcnt) {
751 tab = &PerlIO_stdio;
752 }
dfebf958 753 }
14a5cf38
JH		 754 PerlIO_debug("Pushing %s\n", tab->name);
755 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
756 &PL_sv_undef);
dfebf958
NIS		 757}
758
e3f3bf95 759SV *
14a5cf38 760PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 761{
14a5cf38 762 return av->array[n].arg;
e3f3bf95
NIS		 763}
764
f3862f8b 765PerlIO_funcs *
14a5cf38 766PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 767{
14a5cf38
JH		 768 if (n >= 0 && n < av->cur) {
769 PerlIO_debug("Layer %" IVdf " is %s\n", n,
770 av->array[n].funcs->name);
771 return av->array[n].funcs;
772 }
773 if (!def)
774 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
775 return def;
e3f3bf95
NIS		 776}
777
fcf2db38 778PerlIO_list_t *
e3f3bf95
NIS		 779PerlIO_default_layers(pTHX)
780{
14a5cf38
JH		 781 if (!PerlIO_def_layerlist) {
782 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
783 PerlIO_funcs *osLayer = &PerlIO_unix;
784 PerlIO_def_layerlist = PerlIO_list_alloc();
785 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 786#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 787 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 788#if 0
14a5cf38 789 osLayer = &PerlIO_win32;
0c4128ad 790#endif
2f8118af 791#endif
14a5cf38
JH		 792 PerlIO_define_layer(aTHX_ & PerlIO_raw);
793 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
794 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
795 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 796#ifdef HAS_MMAP
14a5cf38 797 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 798#endif
14a5cf38
JH		 799 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
800 PerlIO_define_layer(aTHX_ & PerlIO_byte);
801 PerlIO_list_push(PerlIO_def_layerlist,
802 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
803 &PL_sv_undef);
804 if (s) {
805 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
806 }
807 else {
808 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
809 }
1141d9f8 810 }
14a5cf38
JH		 811 if (PerlIO_def_layerlist->cur < 2) {
812 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
f3862f8b 813 }
14a5cf38 814 return PerlIO_def_layerlist;
e3f3bf95
NIS		 815}
816
0c4f7ff0
NIS		 817void
818Perl_boot_core_PerlIO(pTHX)
819{
820#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 821 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
822 __FILE__);
0c4f7ff0 823#endif
14a5cf38 824 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 825}
e3f3bf95
NIS		 826
827PerlIO_funcs *
828PerlIO_default_layer(pTHX_ I32 n)
829{
14a5cf38
JH		 830 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
831 if (n < 0)
832 n += av->cur;
833 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 834}
835
a999f61b
NIS		 836#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
837#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 838
839void
1141d9f8 840PerlIO_stdstreams(pTHX)
60382766 841{
14a5cf38
JH		 842 if (!_perlio) {
843 PerlIO_allocate(aTHX);
844 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
845 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
846 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
847 }
60382766
NIS		 848}
849
850PerlIO *
14a5cf38
JH		 851PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
852{
853 PerlIOl *l = NULL;
854 l = PerlMemShared_calloc(tab->size, sizeof(char));
855 if (l) {
856 Zero(l, tab->size, char);
857 l->next = *f;
858 l->tab = tab;
859 *f = l;
860 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
861 (mode) ? mode : "(Null)", arg);
862 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
863 PerlIO_pop(aTHX_ f);
864 return NULL;
865 }
866 }
867 return f;
60382766
NIS		 868}
869
dfebf958 870IV
e3f3bf95 871PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 872{
14a5cf38
JH		 873 dTHX;
874 PerlIO_pop(aTHX_ f);
875 if (*f) {
876 PerlIO_flush(f);
877 PerlIO_pop(aTHX_ f);
878 return 0;
879 }
880 return -1;
4b803d04
NIS		 881}
882
883IV
e3f3bf95 884PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 885{
14a5cf38 886 /*
71200d45 887 * Remove the dummy layer
14a5cf38
JH		 888 */
889 dTHX;
890 PerlIO_pop(aTHX_ f);
891 /*
71200d45 892 * Pop back to bottom layer
14a5cf38
JH		 893 */
894 if (f && *f) {
895 PerlIO_flush(f);
896 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
897 if (*PerlIONext(f)) {
898 PerlIO_pop(aTHX_ f);
899 }
900 else {
901 /*
71200d45 902 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 903 */
904 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
905 PerlIO_pop(aTHX_ PerlIONext(f));
906 }
907 break;
908 }
909 }
910 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
911 return 0;
912 }
913 return -1;
dfebf958
NIS		 914}
915
ac27b0f5 916int
14a5cf38
JH		 917PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
918 PerlIO_list_t *layers, IV n)
919{
920 IV max = layers->cur;
921 int code = 0;
922 while (n < max) {
923 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
924 if (tab) {
925 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
926 code = -1;
927 break;
928 }
929 }
930 n++;
931 }
932 return code;
e3f3bf95
NIS		 933}
934
935int
ac27b0f5
NIS		 936PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
937{
14a5cf38
JH		 938 int code = 0;
939 if (names) {
940 PerlIO_list_t *layers = PerlIO_list_alloc();
941 code = PerlIO_parse_layers(aTHX_ layers, names);
942 if (code == 0) {
943 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
944 }
945 PerlIO_list_free(layers);
ac27b0f5 946 }
14a5cf38 947 return code;
ac27b0f5
NIS		 948}
949
f3862f8b 950
60382766 951/*--------------------------------------------------------------------------------------*/
14a5cf38 952/*
71200d45 953 * Given the abstraction above the public API functions
14a5cf38 954 */
60382766
NIS		 955
956int
f5b9d040 957PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 958{
14a5cf38
JH		 959 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
960 f, PerlIOBase(f)->tab->name, iotype, mode,
961 (names) ? names : "(Null)");
89aec743 962 PerlIO_flush(f);
14a5cf38
JH		 963 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
964 PerlIO *top = f;
965 while (*top) {
966 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 967 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
968 break;
969 }
970 top = PerlIONext(top);
89aec743 971 PerlIO_flush(top);
14a5cf38
JH		 972 }
973 }
974 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 975}
976
977#undef PerlIO__close
978int
979PerlIO__close(PerlIO *f)
980{
14a5cf38
JH		 981 if (f && *f)
982 return (*PerlIOBase(f)->tab->Close) (f);
983 else {
984 SETERRNO(EBADF, SS$_IVCHAN);
985 return -1;
986 }
76ced9ad
NIS		 987}
988
5f1a76d0
NIS		 989#undef PerlIO_fdupopen
990PerlIO *
8cf8f3d1 991PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
5f1a76d0 992{
14a5cf38 993 if (f && *f) {
8cf8f3d1 994 PerlIO_funcs *tab = PerlIOBase(f)->tab;
a8fc9800
NIS		 995 PerlIO *new;
996 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
997 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
14a5cf38
JH		 998 return new;
999 }
1000 else {
1001 SETERRNO(EBADF, SS$_IVCHAN);
1002 return NULL;
1003 }
5f1a76d0 1004}
f5b9d040 1005
b931b1d9
NIS		 1006#undef PerlIO_close
1007int
1008PerlIO_close(PerlIO *f)
1009{
14a5cf38
JH		 1010 dTHX;
1011 int code = -1;
1012 if (f && *f) {
1013 code = (*PerlIOBase(f)->tab->Close) (f);
1014 while (*f) {
1015 PerlIO_pop(aTHX_ f);
1016 }
f6c77cf1 1017 }
14a5cf38 1018 return code;
b931b1d9
NIS		 1019}
1020
1021#undef PerlIO_fileno
1022int
1023PerlIO_fileno(PerlIO *f)
1024{
14a5cf38
JH		 1025 if (f && *f)
1026 return (*PerlIOBase(f)->tab->Fileno) (f);
1027 else {
1028 SETERRNO(EBADF, SS$_IVCHAN);
1029 return -1;
1030 }
b931b1d9
NIS		 1031}
1032
1141d9f8
NIS		 1033static const char *
1034PerlIO_context_layers(pTHX_ const char *mode)
1035{
14a5cf38
JH		 1036 const char *type = NULL;
1037 /*
71200d45 1038 * Need to supply default layer info from open.pm
14a5cf38
JH		 1039 */
1040 if (PL_curcop) {
1041 SV *layers = PL_curcop->cop_io;
1042 if (layers) {
1043 STRLEN len;
1044 type = SvPV(layers, len);
1045 if (type && mode[0] != 'r') {
1046 /*
71200d45 1047 * Skip to write part
14a5cf38
JH		 1048 */
1049 const char *s = strchr(type, 0);
1050 if (s && (s - type) < len) {
1051 type = s + 1;
1052 }
1053 }
1054 }
1055 }
1056 return type;
1141d9f8
NIS		 1057}
1058
fcf2db38 1059static PerlIO_funcs *
2edd7e44
NIS		 1060PerlIO_layer_from_ref(pTHX_ SV *sv)
1061{
14a5cf38 1062 /*
71200d45 1063 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1064 */
1065 if (SvTYPE(sv) < SVt_PVAV)
1066 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1067
1068 /*
71200d45 1069 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1070 */
1071 switch (SvTYPE(sv)) {
1072 case SVt_PVAV:
1073 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1074 case SVt_PVHV:
1075 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1076 case SVt_PVCV:
1077 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1078 case SVt_PVGV:
1079 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1080 }
1081 return NULL;
2edd7e44
NIS		 1082}
1083
fcf2db38 1084PerlIO_list_t *
14a5cf38
JH		 1085PerlIO_resolve_layers(pTHX_ const char *layers,
1086 const char *mode, int narg, SV **args)
1087{
1088 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1089 int incdef = 1;
1090 if (!_perlio)
1091 PerlIO_stdstreams(aTHX);
1092 if (narg) {
1093 SV *arg = *args;
1094 /*
71200d45
NIS		 1095 * If it is a reference but not an object see if we have a handler
1096 * for it
14a5cf38
JH		 1097 */
1098 if (SvROK(arg) && !sv_isobject(arg)) {
1099 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1100 if (handler) {
1101 def = PerlIO_list_alloc();
1102 PerlIO_list_push(def, handler, &PL_sv_undef);
1103 incdef = 0;
1104 }
1105 /*
71200d45 1106 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1107 * something sensible else we will just stringfy and open
71200d45 1108 * resulting string.
14a5cf38
JH		 1109 */
1110 }
1111 }
1112 if (!layers)
1113 layers = PerlIO_context_layers(aTHX_ mode);
1114 if (layers && *layers) {
1115 PerlIO_list_t *av;
1116 if (incdef) {
1117 IV i = def->cur;
1118 av = PerlIO_list_alloc();
1119 for (i = 0; i < def->cur; i++) {
1120 PerlIO_list_push(av, def->array[i].funcs,
1121 def->array[i].arg);
1122 }
1123 }
1124 else {
1125 av = def;
1126 }
1127 PerlIO_parse_layers(aTHX_ av, layers);
1128 return av;
1129 }
1130 else {
1131 if (incdef)
1132 def->refcnt++;
1133 return def;
1134 }
ee518936
NIS		 1135}
1136
1137PerlIO *
14a5cf38
JH		 1138PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1139 int imode, int perm, PerlIO *f, int narg, SV **args)
1140{
1141 if (!f && narg == 1 && *args == &PL_sv_undef) {
1142 if ((f = PerlIO_tmpfile())) {
1143 if (!layers)
1144 layers = PerlIO_context_layers(aTHX_ mode);
1145 if (layers && *layers)
1146 PerlIO_apply_layers(aTHX_ f, mode, layers);
1147 }
1148 }
1149 else {
1150 PerlIO_list_t *layera = NULL;
1151 IV n;
1152 PerlIO_funcs *tab = NULL;
1153 if (f && *f) {
1154 /*
71200d45
NIS		 1155 * This is "reopen" - it is not tested as perl does not use it
1156 * yet
14a5cf38
JH		 1157 */
1158 PerlIOl *l = *f;
1159 layera = PerlIO_list_alloc();
1160 while (l) {
1161 SV *arg =
1162 (l->tab->Getarg) ? (*l->tab->
1163 Getarg) (&l) : &PL_sv_undef;
1164 PerlIO_list_push(layera, l->tab, arg);
1165 l = *PerlIONext(&l);
1166 }
1167 }
1168 else {
1169 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1170 }
1171 /*
71200d45 1172 * Start at "top" of layer stack
14a5cf38
JH		 1173 */
1174 n = layera->cur - 1;
1175 while (n >= 0) {
1176 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1177 if (t && t->Open) {
1178 tab = t;
1179 break;
1180 }
1181 n--;
1182 }
1183 if (tab) {
1184 /*
71200d45 1185 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1186 */
1187 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1188 tab->name, layers, mode, fd, imode, perm, f, narg,
1189 args);
1190 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1191 f, narg, args);
1192 if (f) {
1193 if (n + 1 < layera->cur) {
1194 /*
1195 * More layers above the one that we used to open -
71200d45 1196 * apply them now
14a5cf38
JH		 1197 */
1198 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1199 != 0) {
1200 f = NULL;
1201 }
1202 }
1203 }
1204 }
1205 PerlIO_list_free(layera);
1206 }
1207 return f;
ee518936 1208}
b931b1d9
NIS		 1209
1210
9e353e3b
NIS		 1211#undef PerlIO_fdopen
1212PerlIO *
1213PerlIO_fdopen(int fd, const char *mode)
1214{
14a5cf38
JH		 1215 dTHX;
1216 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1217}
1218
6f9d8c32
NIS		 1219#undef PerlIO_open
1220PerlIO *
1221PerlIO_open(const char *path, const char *mode)
1222{
14a5cf38
JH		 1223 dTHX;
1224 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1225 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1226}
1227
9e353e3b
NIS		 1228#undef PerlIO_reopen
1229PerlIO *
1230PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1231{
14a5cf38
JH		 1232 dTHX;
1233 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1234 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1235}
1236
9e353e3b
NIS		 1237#undef PerlIO_read
1238SSize_t
1239PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1240{
14a5cf38
JH		 1241 if (f && *f)
1242 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1243 else {
1244 SETERRNO(EBADF, SS$_IVCHAN);
1245 return -1;
1246 }
760ac839
LW		 1247}
1248
313ca112
NIS		 1249#undef PerlIO_unread
1250SSize_t
1251PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1252{
14a5cf38
JH		 1253 if (f && *f)
1254 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1255 else {
1256 SETERRNO(EBADF, SS$_IVCHAN);
1257 return -1;
1258 }
760ac839
LW		 1259}
1260
9e353e3b
NIS		 1261#undef PerlIO_write
1262SSize_t
1263PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1264{
14a5cf38
JH		 1265 if (f && *f)
1266 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1267 else {
1268 SETERRNO(EBADF, SS$_IVCHAN);
1269 return -1;
1270 }
760ac839
LW		 1271}
1272
9e353e3b 1273#undef PerlIO_seek
6f9d8c32 1274int
9e353e3b 1275PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1276{
14a5cf38
JH		 1277 if (f && *f)
1278 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1279 else {
1280 SETERRNO(EBADF, SS$_IVCHAN);
1281 return -1;
1282 }
760ac839
LW		 1283}
1284
9e353e3b
NIS		 1285#undef PerlIO_tell
1286Off_t
1287PerlIO_tell(PerlIO *f)
760ac839 1288{
14a5cf38
JH		 1289 if (f && *f)
1290 return (*PerlIOBase(f)->tab->Tell) (f);
1291 else {
1292 SETERRNO(EBADF, SS$_IVCHAN);
1293 return -1;
1294 }
760ac839
LW		 1295}
1296
9e353e3b 1297#undef PerlIO_flush
6f9d8c32 1298int
9e353e3b 1299PerlIO_flush(PerlIO *f)
760ac839 1300{
14a5cf38
JH		 1301 if (f) {
1302 if (*f) {
1303 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1304 if (tab && tab->Flush) {
1305 return (*tab->Flush) (f);
1306 }
1307 else {
1308 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1309 SETERRNO(EBADF, SS$_IVCHAN);
1310 return -1;
1311 }
1312 }
1313 else {
1314 PerlIO_debug("Cannot flush f=%p\n", f);
1315 SETERRNO(EBADF, SS$_IVCHAN);
1316 return -1;
1317 }
1318 }
1319 else {
1320 /*
1321 * Is it good API design to do flush-all on NULL, a potentially
1322 * errorneous input? Maybe some magical value (PerlIO*
1323 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1324 * things on fflush(NULL), but should we be bound by their design
71200d45 1325 * decisions? --jhi
14a5cf38
JH		 1326 */
1327 PerlIO **table = &_perlio;
1328 int code = 0;
1329 while ((f = *table)) {
1330 int i;
1331 table = (PerlIO **) (f++);
1332 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1333 if (*f && PerlIO_flush(f) != 0)
1334 code = -1;
1335 f++;
1336 }
1337 }
1338 return code;
1339 }
760ac839
LW		 1340}
1341
a9c883f6
NIS		 1342void
1343PerlIOBase_flush_linebuf()
1344{
14a5cf38
JH		 1345 PerlIO **table = &_perlio;
1346 PerlIO *f;
1347 while ((f = *table)) {
1348 int i;
1349 table = (PerlIO **) (f++);
1350 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1351 if (*f
1352 && (PerlIOBase(f)->
1353 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1354 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1355 PerlIO_flush(f);
1356 f++;
1357 }
a9c883f6 1358 }
a9c883f6
NIS		 1359}
1360
06da4f11
NIS		 1361#undef PerlIO_fill
1362int
1363PerlIO_fill(PerlIO *f)
1364{
14a5cf38
JH		 1365 if (f && *f)
1366 return (*PerlIOBase(f)->tab->Fill) (f);
1367 else {
1368 SETERRNO(EBADF, SS$_IVCHAN);
1369 return -1;
1370 }
06da4f11
NIS		 1371}
1372
f3862f8b
NIS		 1373#undef PerlIO_isutf8
1374int
1375PerlIO_isutf8(PerlIO *f)
1376{
14a5cf38
JH		 1377 if (f && *f)
1378 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1379 else {
1380 SETERRNO(EBADF, SS$_IVCHAN);
1381 return -1;
1382 }
f3862f8b
NIS		 1383}
1384
9e353e3b 1385#undef PerlIO_eof
6f9d8c32 1386int
9e353e3b 1387PerlIO_eof(PerlIO *f)
760ac839 1388{
14a5cf38
JH		 1389 if (f && *f)
1390 return (*PerlIOBase(f)->tab->Eof) (f);
1391 else {
1392 SETERRNO(EBADF, SS$_IVCHAN);
1393 return -1;
1394 }
9e353e3b
NIS		 1395}
1396
1397#undef PerlIO_error
1398int
1399PerlIO_error(PerlIO *f)
1400{
14a5cf38
JH		 1401 if (f && *f)
1402 return (*PerlIOBase(f)->tab->Error) (f);
1403 else {
1404 SETERRNO(EBADF, SS$_IVCHAN);
1405 return -1;
1406 }
9e353e3b
NIS		 1407}
1408
1409#undef PerlIO_clearerr
1410void
1411PerlIO_clearerr(PerlIO *f)
1412{
14a5cf38
JH		 1413 if (f && *f)
1414 (*PerlIOBase(f)->tab->Clearerr) (f);
1415 else
1416 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1417}
1418
1419#undef PerlIO_setlinebuf
1420void
1421PerlIO_setlinebuf(PerlIO *f)
1422{
14a5cf38
JH		 1423 if (f && *f)
1424 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1425 else
1426 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1427}
1428
1429#undef PerlIO_has_base
1430int
1431PerlIO_has_base(PerlIO *f)
1432{
14a5cf38
JH		 1433 if (f && *f) {
1434 return (PerlIOBase(f)->tab->Get_base != NULL);
1435 }
1436 return 0;
760ac839
LW		 1437}
1438
9e353e3b
NIS		 1439#undef PerlIO_fast_gets
1440int
1441PerlIO_fast_gets(PerlIO *f)
760ac839 1442{
14a5cf38
JH		 1443 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1444 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1445 return (tab->Set_ptrcnt != NULL);
1446 }
1447 return 0;
9e353e3b
NIS		 1448}
1449
1450#undef PerlIO_has_cntptr
1451int
1452PerlIO_has_cntptr(PerlIO *f)
1453{
14a5cf38
JH		 1454 if (f && *f) {
1455 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1456 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1457 }
1458 return 0;
9e353e3b
NIS		 1459}
1460
1461#undef PerlIO_canset_cnt
1462int
1463PerlIO_canset_cnt(PerlIO *f)
1464{
14a5cf38
JH		 1465 if (f && *f) {
1466 PerlIOl *l = PerlIOBase(f);
1467 return (l->tab->Set_ptrcnt != NULL);
1468 }
1469 return 0;
760ac839
LW		 1470}
1471
1472#undef PerlIO_get_base
888911fc 1473STDCHAR *
a20bf0c3 1474PerlIO_get_base(PerlIO *f)
760ac839 1475{
14a5cf38
JH		 1476 if (f && *f)
1477 return (*PerlIOBase(f)->tab->Get_base) (f);
1478 return NULL;
9e353e3b
NIS		 1479}
1480
1481#undef PerlIO_get_bufsiz
1482int
1483PerlIO_get_bufsiz(PerlIO *f)
1484{
14a5cf38
JH		 1485 if (f && *f)
1486 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1487 return 0;
9e353e3b
NIS		 1488}
1489
1490#undef PerlIO_get_ptr
1491STDCHAR *
1492PerlIO_get_ptr(PerlIO *f)
1493{
14a5cf38
JH		 1494 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1495 if (tab->Get_ptr == NULL)
1496 return NULL;
1497 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1498}
1499
1500#undef PerlIO_get_cnt
05d1247b 1501int
9e353e3b
NIS		 1502PerlIO_get_cnt(PerlIO *f)
1503{
14a5cf38
JH		 1504 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1505 if (tab->Get_cnt == NULL)
1506 return 0;
1507 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1508}
1509
1510#undef PerlIO_set_cnt
1511void
14a5cf38 1512PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1513{
14a5cf38 1514 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1515}
1516
1517#undef PerlIO_set_ptrcnt
1518void
14a5cf38 1519PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1520{
14a5cf38
JH		 1521 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1522 if (tab->Set_ptrcnt == NULL) {
1523 dTHX;
1524 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1525 }
1526 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1527}
1528
1529/*--------------------------------------------------------------------------------------*/
14a5cf38 1530/*
71200d45 1531 * utf8 and raw dummy layers
14a5cf38 1532 */
dfebf958 1533
26fb694e 1534IV
e3f3bf95 1535PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1536{
14a5cf38
JH		 1537 if (PerlIONext(f)) {
1538 dTHX;
1539 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1540 PerlIO_pop(aTHX_ f);
1541 if (tab->kind & PERLIO_K_UTF8)
1542 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1543 else
1544 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1545 return 0;
1546 }
1547 return -1;
26fb694e
NIS		 1548}
1549
dfebf958 1550PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1551 "utf8",
1552 sizeof(PerlIOl),
1553 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1554 PerlIOUtf8_pushed,
1555 NULL,
1556 NULL,
1557 NULL,
1558 NULL,
1559 NULL,
1560 NULL,
1561 NULL,
1562 NULL,
1563 NULL,
1564 NULL,
1565 NULL, /* flush */
1566 NULL, /* fill */
1567 NULL,
1568 NULL,
1569 NULL,
1570 NULL,
1571 NULL, /* get_base */
1572 NULL, /* get_bufsiz */
1573 NULL, /* get_ptr */
1574 NULL, /* get_cnt */
1575 NULL, /* set_ptrcnt */
26fb694e
NIS		 1576};
1577
1578PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1579 "bytes",
1580 sizeof(PerlIOl),
1581 PERLIO_K_DUMMY,
1582 PerlIOUtf8_pushed,
1583 NULL,
1584 NULL,
1585 NULL,
1586 NULL,
1587 NULL,
1588 NULL,
1589 NULL,
1590 NULL,
1591 NULL,
1592 NULL,
1593 NULL, /* flush */
1594 NULL, /* fill */
1595 NULL,
1596 NULL,
1597 NULL,
1598 NULL,
1599 NULL, /* get_base */
1600 NULL, /* get_bufsiz */
1601 NULL, /* get_ptr */
1602 NULL, /* get_cnt */
1603 NULL, /* set_ptrcnt */
dfebf958
NIS		 1604};
1605
1606PerlIO *
14a5cf38
JH		 1607PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1608 IV n, const char *mode, int fd, int imode, int perm,
1609 PerlIO *old, int narg, SV **args)
dfebf958 1610{
14a5cf38
JH		 1611 PerlIO_funcs *tab = PerlIO_default_btm();
1612 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1613 old, narg, args);
dfebf958
NIS		 1614}
1615
1616PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1617 "raw",
1618 sizeof(PerlIOl),
1619 PERLIO_K_DUMMY,
1620 PerlIORaw_pushed,
1621 PerlIOBase_popped,
1622 PerlIORaw_open,
1623 NULL,
1624 NULL,
1625 NULL,
1626 NULL,
1627 NULL,
1628 NULL,
1629 NULL,
1630 NULL,
1631 NULL, /* flush */
1632 NULL, /* fill */
1633 NULL,
1634 NULL,
1635 NULL,
1636 NULL,
1637 NULL, /* get_base */
1638 NULL, /* get_bufsiz */
1639 NULL, /* get_ptr */
1640 NULL, /* get_cnt */
1641 NULL, /* set_ptrcnt */
dfebf958
NIS		 1642};
1643/*--------------------------------------------------------------------------------------*/
1644/*--------------------------------------------------------------------------------------*/
14a5cf38 1645/*
71200d45 1646 * "Methods" of the "base class"
14a5cf38 1647 */
9e353e3b
NIS		 1648
1649IV
1650PerlIOBase_fileno(PerlIO *f)
1651{
14a5cf38 1652 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1653}
1654
f5b9d040 1655char *
14a5cf38
JH		 1656PerlIO_modestr(PerlIO *f, char *buf)
1657{
1658 char *s = buf;
1659 IV flags = PerlIOBase(f)->flags;
1660 if (flags & PERLIO_F_APPEND) {
1661 *s++ = 'a';
1662 if (flags & PERLIO_F_CANREAD) {
1663 *s++ = '+';
1664 }
1665 }
1666 else if (flags & PERLIO_F_CANREAD) {
1667 *s++ = 'r';
1668 if (flags & PERLIO_F_CANWRITE)
1669 *s++ = '+';
1670 }
1671 else if (flags & PERLIO_F_CANWRITE) {
1672 *s++ = 'w';
1673 if (flags & PERLIO_F_CANREAD) {
1674 *s++ = '+';
1675 }
1676 }
5f1a76d0 1677#if O_TEXT != O_BINARY
14a5cf38
JH		 1678 if (!(flags & PERLIO_F_CRLF))
1679 *s++ = 'b';
5f1a76d0 1680#endif
14a5cf38
JH		 1681 *s = '\0';
1682 return buf;
f5b9d040
NIS		 1683}
1684
76ced9ad 1685IV
e3f3bf95 1686PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1687{
14a5cf38 1688 PerlIOl *l = PerlIOBase(f);
b7953727 1689#if 0
14a5cf38
JH		 1690 const char *omode = mode;
1691 char temp[8];
b7953727 1692#endif
14a5cf38
JH		 1693 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1694 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1695 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1696 if (tab->Set_ptrcnt != NULL)
1697 l->flags |= PERLIO_F_FASTGETS;
1698 if (mode) {
1699 if (*mode == '#' || *mode == 'I')
1700 mode++;
1701 switch (*mode++) {
1702 case 'r':
1703 l->flags |= PERLIO_F_CANREAD;
1704 break;
1705 case 'a':
1706 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1707 break;
1708 case 'w':
1709 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1710 break;
1711 default:
1712 SETERRNO(EINVAL, LIB$_INVARG);
1713 return -1;
1714 }
1715 while (*mode) {
1716 switch (*mode++) {
1717 case '+':
1718 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1719 break;
1720 case 'b':
1721 l->flags &= ~PERLIO_F_CRLF;
1722 break;
1723 case 't':
1724 l->flags |= PERLIO_F_CRLF;
1725 break;
1726 default:
1727 SETERRNO(EINVAL, LIB$_INVARG);
1728 return -1;
1729 }
1730 }
1731 }
1732 else {
1733 if (l->next) {
1734 l->flags |= l->next->flags &
1735 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1736 PERLIO_F_APPEND);
1737 }
1738 }
5e2ab84b 1739#if 0
14a5cf38
JH		 1740 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1741 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1742 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1743#endif
14a5cf38 1744 return 0;
76ced9ad
NIS		 1745}
1746
1747IV
1748PerlIOBase_popped(PerlIO *f)
1749{
14a5cf38 1750 return 0;
760ac839
LW		 1751}
1752
9e353e3b
NIS		 1753SSize_t
1754PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1755{
14a5cf38
JH		 1756 dTHX;
1757 /*
71200d45 1758 * Save the position as current head considers it
14a5cf38
JH		 1759 */
1760 Off_t old = PerlIO_tell(f);
1761 SSize_t done;
1762 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1763 PerlIOSelf(f, PerlIOBuf)->posn = old;
1764 done = PerlIOBuf_unread(f, vbuf, count);
1765 return done;
9e353e3b
NIS		 1766}
1767
f6c77cf1
NIS		 1768SSize_t
1769PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1770{
14a5cf38
JH		 1771 STDCHAR *buf = (STDCHAR *) vbuf;
1772 if (f) {
1773 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1774 return 0;
1775 while (count > 0) {
1776 SSize_t avail = PerlIO_get_cnt(f);
1777 SSize_t take = 0;
1778 if (avail > 0)
1779 take = (count < avail) ? count : avail;
1780 if (take > 0) {
1781 STDCHAR *ptr = PerlIO_get_ptr(f);
1782 Copy(ptr, buf, take, STDCHAR);
1783 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1784 count -= take;
1785 buf += take;
1786 }
1787 if (count > 0 && avail <= 0) {
1788 if (PerlIO_fill(f) != 0)
1789 break;
1790 }
1791 }
1792 return (buf - (STDCHAR *) vbuf);
1793 }
f6c77cf1 1794 return 0;
f6c77cf1
NIS		 1795}
1796
9e353e3b 1797IV
06da4f11 1798PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1799{
14a5cf38 1800 return 0;
9e353e3b
NIS		 1801}
1802
1803IV
06da4f11
NIS		 1804PerlIOBase_noop_fail(PerlIO *f)
1805{
14a5cf38 1806 return -1;
06da4f11
NIS		 1807}
1808
1809IV
9e353e3b
NIS		 1810PerlIOBase_close(PerlIO *f)
1811{
14a5cf38
JH		 1812 IV code = 0;
1813 PerlIO *n = PerlIONext(f);
1814 if (PerlIO_flush(f) != 0)
1815 code = -1;
1816 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1817 code = -1;
1818 PerlIOBase(f)->flags &=
1819 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1820 return code;
9e353e3b
NIS		 1821}
1822
1823IV
1824PerlIOBase_eof(PerlIO *f)
1825{
14a5cf38
JH		 1826 if (f && *f) {
1827 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1828 }
1829 return 1;
9e353e3b
NIS		 1830}
1831
1832IV
1833PerlIOBase_error(PerlIO *f)
1834{
14a5cf38
JH		 1835 if (f && *f) {
1836 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1837 }
1838 return 1;
9e353e3b
NIS		 1839}
1840
1841void
1842PerlIOBase_clearerr(PerlIO *f)
1843{
14a5cf38
JH		 1844 if (f && *f) {
1845 PerlIO *n = PerlIONext(f);
1846 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1847 if (n)
1848 PerlIO_clearerr(n);
1849 }
9e353e3b
NIS		 1850}
1851
1852void
1853PerlIOBase_setlinebuf(PerlIO *f)
1854{
14a5cf38
JH		 1855 if (f) {
1856 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1857 }
9e353e3b
NIS		 1858}
1859
9e353e3b 1860/*--------------------------------------------------------------------------------------*/
14a5cf38 1861/*
71200d45 1862 * Bottom-most level for UNIX-like case
14a5cf38 1863 */
9e353e3b 1864
14a5cf38
JH		 1865typedef struct {
1866 struct _PerlIO base; /* The generic part */
1867 int fd; /* UNIX like file descriptor */
1868 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 1869} PerlIOUnix;
1870
6f9d8c32 1871int
9e353e3b 1872PerlIOUnix_oflags(const char *mode)
760ac839 1873{
14a5cf38
JH		 1874 int oflags = -1;
1875 if (*mode == 'I' || *mode == '#')
1876 mode++;
1877 switch (*mode) {
1878 case 'r':
1879 oflags = O_RDONLY;
1880 if (*++mode == '+') {
1881 oflags = O_RDWR;
1882 mode++;
1883 }
1884 break;
1885
1886 case 'w':
1887 oflags = O_CREAT | O_TRUNC;
1888 if (*++mode == '+') {
1889 oflags |= O_RDWR;
1890 mode++;
1891 }
1892 else
1893 oflags |= O_WRONLY;
1894 break;
1895
1896 case 'a':
1897 oflags = O_CREAT | O_APPEND;
1898 if (*++mode == '+') {
1899 oflags |= O_RDWR;
1900 mode++;
1901 }
1902 else
1903 oflags |= O_WRONLY;
1904 break;
1905 }
1906 if (*mode == 'b') {
1907 oflags |= O_BINARY;
1908 oflags &= ~O_TEXT;
1909 mode++;
1910 }
1911 else if (*mode == 't') {
1912 oflags |= O_TEXT;
1913 oflags &= ~O_BINARY;
1914 mode++;
1915 }
1916 /*
71200d45 1917 * Always open in binary mode
14a5cf38
JH		 1918 */
1919 oflags |= O_BINARY;
1920 if (*mode || oflags == -1) {
1921 SETERRNO(EINVAL, LIB$_INVARG);
1922 oflags = -1;
1923 }
1924 return oflags;
9e353e3b
NIS		 1925}
1926
1927IV
1928PerlIOUnix_fileno(PerlIO *f)
1929{
14a5cf38 1930 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 1931}
1932
4b803d04 1933IV
e3f3bf95 1934PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 1935{
14a5cf38
JH		 1936 IV code = PerlIOBase_pushed(f, mode, arg);
1937 if (*PerlIONext(f)) {
1938 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1939 s->fd = PerlIO_fileno(PerlIONext(f));
1940 /*
71200d45 1941 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 1942 * handle rather than believing the "mode" we are passed in? XXX
71200d45 1943 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 1944 */
1945 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1946 }
1947 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1948 return code;
4b803d04
NIS		 1949}
1950
9e353e3b 1951PerlIO *
14a5cf38
JH		 1952PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1953 IV n, const char *mode, int fd, int imode,
1954 int perm, PerlIO *f, int narg, SV **args)
1955{
1956 if (f) {
1957 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1958 (*PerlIOBase(f)->tab->Close) (f);
1959 }
1960 if (narg > 0) {
1961 char *path = SvPV_nolen(*args);
1962 if (*mode == '#')
1963 mode++;
1964 else {
1965 imode = PerlIOUnix_oflags(mode);
1966 perm = 0666;
1967 }
1968 if (imode != -1) {
1969 fd = PerlLIO_open3(path, imode, perm);
1970 }
1971 }
1972 if (fd >= 0) {
1973 PerlIOUnix *s;
1974 if (*mode == 'I')
1975 mode++;
1976 if (!f) {
1977 f = PerlIO_allocate(aTHX);
1978 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1979 PerlIOUnix);
1980 }
1981 else
1982 s = PerlIOSelf(f, PerlIOUnix);
1983 s->fd = fd;
1984 s->oflags = imode;
1985 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1986 return f;
1987 }
1988 else {
1989 if (f) {
1990 /*
71200d45 1991 * FIXME: pop layers ???
14a5cf38
JH		 1992 */
1993 }
1994 return NULL;
1995 }
9e353e3b
NIS		 1996}
1997
8cf8f3d1
NIS		 1998SV *
1999PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
71200d45 2000{
8cf8f3d1
NIS		 2001 if (!arg)
2002 return Nullsv;
71200d45 2003#ifdef sv_dup
8cf8f3d1
NIS		 2004 if (param) {
2005 return sv_dup(arg, param);
2006 }
2007 else {
2008 return newSVsv(arg);
2009 }
2010#else
2011 return newSVsv(arg);
71200d45 2012#endif
8cf8f3d1
NIS		 2013}
2014
2015PerlIO *
2016PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2017{
2018 PerlIO *nexto = PerlIONext(o);
a8fc9800 2019 PerlIO_debug("PerlIOBase_dup f=%p o=%p param=%p\n",f,o,param);
8cf8f3d1
NIS		 2020 if (*nexto) {
2021 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2022 f = (*tab->Dup)(aTHX_ f, nexto, param);
71200d45 2023 }
8cf8f3d1
NIS		 2024 if (f) {
2025 PerlIO_funcs *self = PerlIOBase(o)->tab;
2026 SV *arg = Nullsv;
2027 char buf[8];
2028 if (self->Getarg) {
2029 arg = (*self->Getarg)(o);
2030 if (arg) {
2031 arg = PerlIO_sv_dup(aTHX_ arg, param);
2032 }
2033 }
2034 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2035 if (!f && arg) {
2036 SvREFCNT_dec(arg);
2037 }
71200d45 2038 }
71200d45
NIS		 2039 return f;
2040}
2041
2042PerlIO *
8cf8f3d1 2043PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2044{
2045 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2046 int fd = PerlLIO_dup(os->fd);
2047 if (fd >= 0) {
2048 f = PerlIOBase_dup(aTHX_ f, o, param);
2049 if (f) {
2050 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2051 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2052 s->fd = fd;
2053 return f;
2054 }
2055 else {
2056 PerlLIO_close(fd);
2057 }
2058 }
2059 return NULL;
2060}
2061
2062
9e353e3b
NIS		 2063SSize_t
2064PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2065{
14a5cf38
JH		 2066 dTHX;
2067 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2068 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2069 return 0;
2070 while (1) {
2071 SSize_t len = PerlLIO_read(fd, vbuf, count);
2072 if (len >= 0 || errno != EINTR) {
2073 if (len < 0)
2074 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2075 else if (len == 0 && count != 0)
2076 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2077 return len;
2078 }
2079 PERL_ASYNC_CHECK();
2080 }
9e353e3b
NIS		 2081}
2082
2083SSize_t
2084PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2085{
14a5cf38
JH		 2086 dTHX;
2087 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2088 while (1) {
2089 SSize_t len = PerlLIO_write(fd, vbuf, count);
2090 if (len >= 0 || errno != EINTR) {
2091 if (len < 0)
2092 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2093 return len;
2094 }
2095 PERL_ASYNC_CHECK();
06da4f11 2096 }
9e353e3b
NIS		 2097}
2098
2099IV
2100PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2101{
14a5cf38
JH		 2102 dSYS;
2103 Off_t new =
2104 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2105 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2106 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2107}
2108
2109Off_t
2110PerlIOUnix_tell(PerlIO *f)
2111{
14a5cf38
JH		 2112 dSYS;
2113 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2114}
2115
71200d45 2116
9e353e3b
NIS		 2117IV
2118PerlIOUnix_close(PerlIO *f)
2119{
14a5cf38
JH		 2120 dTHX;
2121 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2122 int code = 0;
2123 while (PerlLIO_close(fd) != 0) {
2124 if (errno != EINTR) {
2125 code = -1;
2126 break;
2127 }
2128 PERL_ASYNC_CHECK();
2129 }
2130 if (code == 0) {
2131 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2132 }
2133 return code;
9e353e3b
NIS		 2134}
2135
2136PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2137 "unix",
2138 sizeof(PerlIOUnix),
2139 PERLIO_K_RAW,
2140 PerlIOUnix_pushed,
2141 PerlIOBase_noop_ok,
2142 PerlIOUnix_open,
2143 NULL,
2144 PerlIOUnix_fileno,
71200d45 2145 PerlIOUnix_dup,
14a5cf38
JH		 2146 PerlIOUnix_read,
2147 PerlIOBase_unread,
2148 PerlIOUnix_write,
2149 PerlIOUnix_seek,
2150 PerlIOUnix_tell,
2151 PerlIOUnix_close,
2152 PerlIOBase_noop_ok, /* flush */
2153 PerlIOBase_noop_fail, /* fill */
2154 PerlIOBase_eof,
2155 PerlIOBase_error,
2156 PerlIOBase_clearerr,
2157 PerlIOBase_setlinebuf,
2158 NULL, /* get_base */
2159 NULL, /* get_bufsiz */
2160 NULL, /* get_ptr */
2161 NULL, /* get_cnt */
2162 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2163};
2164
2165/*--------------------------------------------------------------------------------------*/
14a5cf38 2166/*
71200d45 2167 * stdio as a layer
14a5cf38 2168 */
9e353e3b 2169
14a5cf38
JH		 2170typedef struct {
2171 struct _PerlIO base;
2172 FILE *stdio; /* The stream */
9e353e3b
NIS		 2173} PerlIOStdio;
2174
2175IV
2176PerlIOStdio_fileno(PerlIO *f)
2177{
14a5cf38
JH		 2178 dSYS;
2179 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2180}
2181
766a733e 2182char *
14a5cf38
JH		 2183PerlIOStdio_mode(const char *mode, char *tmode)
2184{
2185 char *ret = tmode;
2186 while (*mode) {
2187 *tmode++ = *mode++;
2188 }
2189 if (O_BINARY != O_TEXT) {
2190 *tmode++ = 'b';
2191 }
2192 *tmode = '\0';
2193 return ret;
2194}
2195
2196/*
71200d45 2197 * This isn't used yet ...
14a5cf38 2198 */
4b803d04 2199IV
e3f3bf95 2200PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2201{
14a5cf38
JH		 2202 if (*PerlIONext(f)) {
2203 dSYS;
2204 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2205 char tmode[8];
2206 FILE *stdio =
2207 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2208 PerlIOStdio_mode(mode, tmode));
2209 if (stdio)
2210 s->stdio = stdio;
2211 else
2212 return -1;
2213 }
2214 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2215}
2216
9e353e3b
NIS		 2217#undef PerlIO_importFILE
2218PerlIO *
2219PerlIO_importFILE(FILE *stdio, int fl)
2220{
14a5cf38
JH		 2221 dTHX;
2222 PerlIO *f = NULL;
2223 if (stdio) {
2224 PerlIOStdio *s =
2225 PerlIOSelf(PerlIO_push
2226 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2227 "r+", Nullsv), PerlIOStdio);
2228 s->stdio = stdio;
2229 }
2230 return f;
9e353e3b
NIS		 2231}
2232
2233PerlIO *
14a5cf38
JH		 2234PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2235 IV n, const char *mode, int fd, int imode,
2236 int perm, PerlIO *f, int narg, SV **args)
2237{
2238 char tmode[8];
2239 if (f) {
2240 char *path = SvPV_nolen(*args);
2241 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2242 FILE *stdio =
2243 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2244 s->stdio);
2245 if (!s->stdio)
2246 return NULL;
2247 s->stdio = stdio;
2248 return f;
2249 }
2250 else {
2251 if (narg > 0) {
2252 char *path = SvPV_nolen(*args);
2253 if (*mode == '#') {
2254 mode++;
2255 fd = PerlLIO_open3(path, imode, perm);
2256 }
2257 else {
2258 FILE *stdio = PerlSIO_fopen(path, mode);
2259 if (stdio) {
2260 PerlIOStdio *s =
2261 PerlIOSelf(PerlIO_push
2262 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2263 (mode = PerlIOStdio_mode(mode, tmode)),
2264 PerlIOArg),
2265 PerlIOStdio);
2266 s->stdio = stdio;
2267 }
2268 return f;
2269 }
2270 }
2271 if (fd >= 0) {
2272 FILE *stdio = NULL;
2273 int init = 0;
2274 if (*mode == 'I') {
2275 init = 1;
2276 mode++;
2277 }
2278 if (init) {
2279 switch (fd) {
2280 case 0:
2281 stdio = PerlSIO_stdin;
2282 break;
2283 case 1:
2284 stdio = PerlSIO_stdout;
2285 break;
2286 case 2:
2287 stdio = PerlSIO_stderr;
2288 break;
2289 }
2290 }
2291 else {
2292 stdio = PerlSIO_fdopen(fd, mode =
2293 PerlIOStdio_mode(mode, tmode));
2294 }
2295 if (stdio) {
2296 PerlIOStdio *s =
2297 PerlIOSelf(PerlIO_push
2298 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2299 mode, PerlIOArg), PerlIOStdio);
2300 s->stdio = stdio;
2301 return f;
2302 }
2303 }
2304 }
ee518936 2305 return NULL;
9e353e3b
NIS		 2306}
2307
2308SSize_t
2309PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2310{
14a5cf38
JH		 2311 dSYS;
2312 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2313 SSize_t got = 0;
2314 if (count == 1) {
2315 STDCHAR *buf = (STDCHAR *) vbuf;
2316 /*
2317 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2318 * stdio does not do that for fread()
14a5cf38
JH		 2319 */
2320 int ch = PerlSIO_fgetc(s);
2321 if (ch != EOF) {
2322 *buf = ch;
2323 got = 1;
2324 }
2325 }
2326 else
2327 got = PerlSIO_fread(vbuf, 1, count, s);
2328 return got;
9e353e3b
NIS		 2329}
2330
2331SSize_t
2332PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2333{
14a5cf38
JH		 2334 dSYS;
2335 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2336 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2337 SSize_t unread = 0;
2338 while (count > 0) {
2339 int ch = *buf-- & 0xff;
2340 if (PerlSIO_ungetc(ch, s) != ch)
2341 break;
2342 unread++;
2343 count--;
2344 }
2345 return unread;
9e353e3b
NIS		 2346}
2347
2348SSize_t
2349PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2350{
14a5cf38
JH		 2351 dSYS;
2352 return PerlSIO_fwrite(vbuf, 1, count,
2353 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2354}
2355
2356IV
2357PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2358{
14a5cf38
JH		 2359 dSYS;
2360 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2361 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2362}
2363
2364Off_t
2365PerlIOStdio_tell(PerlIO *f)
2366{
14a5cf38
JH		 2367 dSYS;
2368 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2369 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2370}
2371
2372IV
2373PerlIOStdio_close(PerlIO *f)
2374{
14a5cf38 2375 dSYS;
af130d45 2376#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2377 int optval;
2378 Sock_size_t optlen = sizeof(int);
8e4bc33b 2379#endif
14a5cf38
JH		 2380 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2381 return (
af130d45 2382#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2383 (getsockopt
2384 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2385 &optlen) <
2386 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2387#else
14a5cf38 2388 PerlSIO_fclose(stdio)
8e4bc33b 2389#endif
14a5cf38 2390 );
8e4bc33b 2391
9e353e3b
NIS		 2392}
2393
2394IV
2395PerlIOStdio_flush(PerlIO *f)
2396{
14a5cf38
JH		 2397 dSYS;
2398 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2399 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2400 return PerlSIO_fflush(stdio);
2401 }
2402 else {
88b61e10 2403#if 0
14a5cf38
JH		 2404 /*
2405 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2406 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2407 * design is to do _this_ but not have layer above flush this
71200d45 2408 * layer read-to-read
14a5cf38
JH		 2409 */
2410 /*
71200d45 2411 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2412 */
2413 int err = errno;
2414 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2415 errno = err;
88b61e10 2416#endif
14a5cf38
JH		 2417 }
2418 return 0;
9e353e3b
NIS		 2419}
2420
2421IV
06da4f11
NIS		 2422PerlIOStdio_fill(PerlIO *f)
2423{
14a5cf38
JH		 2424 dSYS;
2425 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2426 int c;
2427 /*
71200d45 2428 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2429 */
2430 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2431 if (PerlSIO_fflush(stdio) != 0)
2432 return EOF;
2433 }
2434 c = PerlSIO_fgetc(stdio);
2435 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2436 return EOF;
2437 return 0;
06da4f11
NIS		 2438}
2439
2440IV
9e353e3b
NIS		 2441PerlIOStdio_eof(PerlIO *f)
2442{
14a5cf38
JH		 2443 dSYS;
2444 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2445}
2446
2447IV
2448PerlIOStdio_error(PerlIO *f)
2449{
14a5cf38
JH		 2450 dSYS;
2451 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2452}
2453
2454void
2455PerlIOStdio_clearerr(PerlIO *f)
2456{
14a5cf38
JH		 2457 dSYS;
2458 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2459}
2460
2461void
2462PerlIOStdio_setlinebuf(PerlIO *f)
2463{
14a5cf38 2464 dSYS;
9e353e3b 2465#ifdef HAS_SETLINEBUF
14a5cf38 2466 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2467#else
14a5cf38 2468 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2469#endif
2470}
2471
2472#ifdef FILE_base
2473STDCHAR *
2474PerlIOStdio_get_base(PerlIO *f)
2475{
14a5cf38
JH		 2476 dSYS;
2477 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2478 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2479}
2480
2481Size_t
2482PerlIOStdio_get_bufsiz(PerlIO *f)
2483{
14a5cf38
JH		 2484 dSYS;
2485 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2486 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2487}
2488#endif
2489
2490#ifdef USE_STDIO_PTR
2491STDCHAR *
2492PerlIOStdio_get_ptr(PerlIO *f)
2493{
14a5cf38
JH		 2494 dSYS;
2495 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2496 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2497}
2498
2499SSize_t
2500PerlIOStdio_get_cnt(PerlIO *f)
2501{
14a5cf38
JH		 2502 dSYS;
2503 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2504 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2505}
2506
2507void
14a5cf38 2508PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2509{
14a5cf38
JH		 2510 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2511 dSYS;
2512 if (ptr != NULL) {
9e353e3b 2513#ifdef STDIO_PTR_LVALUE
14a5cf38 2514 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2515#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2516 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2517 dTHX;
2518 assert(PerlSIO_get_cnt(stdio) == (cnt));
2519 }
9e353e3b
NIS		 2520#endif
2521#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2522 /*
71200d45 2523 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2524 */
2525 return;
9e353e3b 2526#endif
14a5cf38
JH		 2527#else /* STDIO_PTR_LVALUE */
2528 PerlProc_abort();
2529#endif /* STDIO_PTR_LVALUE */
2530 }
2531 /*
71200d45 2532 * Now (or only) set cnt
14a5cf38 2533 */
9e353e3b 2534#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2535 PerlSIO_set_cnt(stdio, cnt);
2536#else /* STDIO_CNT_LVALUE */
9e353e3b 2537#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2538 PerlSIO_set_ptr(stdio,
2539 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2540 cnt));
2541#else /* STDIO_PTR_LVAL_SETS_CNT */
2542 PerlProc_abort();
2543#endif /* STDIO_PTR_LVAL_SETS_CNT */
2544#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2545}
2546
2547#endif
2548
71200d45 2549PerlIO *
8cf8f3d1 2550PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 2551{
a8fc9800 2552 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 2553}
2554
9e353e3b 2555PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2556 "stdio",
2557 sizeof(PerlIOStdio),
2558 PERLIO_K_BUFFERED,
2559 PerlIOBase_pushed,
2560 PerlIOBase_noop_ok,
2561 PerlIOStdio_open,
2562 NULL,
2563 PerlIOStdio_fileno,
71200d45 2564 PerlIOStdio_dup,
14a5cf38
JH		 2565 PerlIOStdio_read,
2566 PerlIOStdio_unread,
2567 PerlIOStdio_write,
2568 PerlIOStdio_seek,
2569 PerlIOStdio_tell,
2570 PerlIOStdio_close,
2571 PerlIOStdio_flush,
2572 PerlIOStdio_fill,
2573 PerlIOStdio_eof,
2574 PerlIOStdio_error,
2575 PerlIOStdio_clearerr,
2576 PerlIOStdio_setlinebuf,
9e353e3b 2577#ifdef FILE_base
14a5cf38
JH		 2578 PerlIOStdio_get_base,
2579 PerlIOStdio_get_bufsiz,
9e353e3b 2580#else
14a5cf38
JH		 2581 NULL,
2582 NULL,
9e353e3b
NIS		 2583#endif
2584#ifdef USE_STDIO_PTR
14a5cf38
JH		 2585 PerlIOStdio_get_ptr,
2586 PerlIOStdio_get_cnt,
0eb1d8a4 2587#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2588 PerlIOStdio_set_ptrcnt
2589#else /* STDIO_PTR_LVALUE */
2590 NULL
2591#endif /* STDIO_PTR_LVALUE */
2592#else /* USE_STDIO_PTR */
2593 NULL,
2594 NULL,
2595 NULL
2596#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2597};
2598
2599#undef PerlIO_exportFILE
2600FILE *
2601PerlIO_exportFILE(PerlIO *f, int fl)
2602{
14a5cf38
JH		 2603 FILE *stdio;
2604 PerlIO_flush(f);
2605 stdio = fdopen(PerlIO_fileno(f), "r+");
2606 if (stdio) {
2607 dTHX;
2608 PerlIOStdio *s =
2609 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2610 PerlIOStdio);
2611 s->stdio = stdio;
2612 }
2613 return stdio;
9e353e3b
NIS		 2614}
2615
2616#undef PerlIO_findFILE
2617FILE *
2618PerlIO_findFILE(PerlIO *f)
2619{
14a5cf38
JH		 2620 PerlIOl *l = *f;
2621 while (l) {
2622 if (l->tab == &PerlIO_stdio) {
2623 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2624 return s->stdio;
2625 }
2626 l = *PerlIONext(&l);
f7e7eb72 2627 }
14a5cf38 2628 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2629}
2630
2631#undef PerlIO_releaseFILE
2632void
2633PerlIO_releaseFILE(PerlIO *p, FILE *f)
2634{
2635}
2636
2637/*--------------------------------------------------------------------------------------*/
14a5cf38 2638/*
71200d45 2639 * perlio buffer layer
14a5cf38 2640 */
9e353e3b 2641
5e2ab84b 2642IV
e3f3bf95 2643PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2644{
14a5cf38
JH		 2645 dSYS;
2646 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2647 int fd = PerlIO_fileno(f);
2648 Off_t posn;
2649 if (fd >= 0 && PerlLIO_isatty(fd)) {
2650 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2651 }
2652 posn = PerlIO_tell(PerlIONext(f));
2653 if (posn != (Off_t) - 1) {
2654 b->posn = posn;
2655 }
2656 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2657}
2658
9e353e3b 2659PerlIO *
14a5cf38
JH		 2660PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2661 IV n, const char *mode, int fd, int imode, int perm,
2662 PerlIO *f, int narg, SV **args)
2663{
2664 if (f) {
2665 PerlIO *next = PerlIONext(f);
2666 PerlIO_funcs *tab =
2667 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2668 next =
2669 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2670 next, narg, args);
2671 if (!next
2672 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2673 return NULL;
2674 }
2675 }
2676 else {
2677 PerlIO_funcs *tab =
2678 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2679 int init = 0;
2680 if (*mode == 'I') {
2681 init = 1;
2682 /*
71200d45 2683 * mode++;
14a5cf38
JH		 2684 */
2685 }
2686 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2687 NULL, narg, args);
2688 if (f) {
2689 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2690 fd = PerlIO_fileno(f);
ee518936 2691#if O_BINARY != O_TEXT
14a5cf38 2692 /*
71200d45 2693 * do something about failing setmode()? --jhi
14a5cf38
JH		 2694 */
2695 PerlLIO_setmode(fd, O_BINARY);
ee518936 2696#endif
14a5cf38
JH		 2697 if (init && fd == 2) {
2698 /*
71200d45 2699 * Initial stderr is unbuffered
14a5cf38
JH		 2700 */
2701 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2702 }
2703 }
ee518936 2704 }
14a5cf38 2705 return f;
9e353e3b
NIS		 2706}
2707
14a5cf38
JH		 2708/*
2709 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2710 * read or write state
14a5cf38 2711 */
9e353e3b
NIS		 2712IV
2713PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2714{
14a5cf38
JH		 2715 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2716 int code = 0;
2717 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2718 /*
71200d45 2719 * write() the buffer
14a5cf38
JH		 2720 */
2721 STDCHAR *buf = b->buf;
2722 STDCHAR *p = buf;
2723 PerlIO *n = PerlIONext(f);
2724 while (p < b->ptr) {
2725 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2726 if (count > 0) {
2727 p += count;
2728 }
2729 else if (count < 0 || PerlIO_error(n)) {
2730 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2731 code = -1;
2732 break;
2733 }
2734 }
2735 b->posn += (p - buf);
2736 }
2737 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2738 STDCHAR *buf = PerlIO_get_base(f);
2739 /*
71200d45 2740 * Note position change
14a5cf38
JH		 2741 */
2742 b->posn += (b->ptr - buf);
2743 if (b->ptr < b->end) {
2744 /*
71200d45 2745 * We did not consume all of it
14a5cf38
JH		 2746 */
2747 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2748 b->posn = PerlIO_tell(PerlIONext(f));
2749 }
2750 }
2751 }
2752 b->ptr = b->end = b->buf;
2753 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2754 /*
71200d45 2755 * FIXME: Is this right for read case ?
14a5cf38
JH		 2756 */
2757 if (PerlIO_flush(PerlIONext(f)) != 0)
2758 code = -1;
2759 return code;
6f9d8c32
NIS		 2760}
2761
06da4f11
NIS		 2762IV
2763PerlIOBuf_fill(PerlIO *f)
2764{
14a5cf38
JH		 2765 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2766 PerlIO *n = PerlIONext(f);
2767 SSize_t avail;
2768 /*
2769 * FIXME: doing the down-stream flush is a bad idea if it causes
2770 * pre-read data in stdio buffer to be discarded but this is too
2771 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2772 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2773 */
2774 if (PerlIO_flush(f) != 0)
2775 return -1;
2776 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2777 PerlIOBase_flush_linebuf();
2778
2779 if (!b->buf)
2780 PerlIO_get_base(f); /* allocate via vtable */
2781
2782 b->ptr = b->end = b->buf;
2783 if (PerlIO_fast_gets(n)) {
2784 /*
2785 * Layer below is also buffered We do _NOT_ want to call its
2786 * ->Read() because that will loop till it gets what we asked for
2787 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2788 * hand, or ask it to fill _once_.
14a5cf38
JH		 2789 */
2790 avail = PerlIO_get_cnt(n);
2791 if (avail <= 0) {
2792 avail = PerlIO_fill(n);
2793 if (avail == 0)
2794 avail = PerlIO_get_cnt(n);
2795 else {
2796 if (!PerlIO_error(n) && PerlIO_eof(n))
2797 avail = 0;
2798 }
2799 }
2800 if (avail > 0) {
2801 STDCHAR *ptr = PerlIO_get_ptr(n);
2802 SSize_t cnt = avail;
2803 if (avail > b->bufsiz)
2804 avail = b->bufsiz;
2805 Copy(ptr, b->buf, avail, STDCHAR);
2806 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2807 }
2808 }
2809 else {
2810 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2811 }
2812 if (avail <= 0) {
2813 if (avail == 0)
2814 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2815 else
2816 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2817 return -1;
2818 }
2819 b->end = b->buf + avail;
2820 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2821 return 0;
06da4f11
NIS		 2822}
2823
6f9d8c32 2824SSize_t
9e353e3b 2825PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2826{
14a5cf38
JH		 2827 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2828 if (f) {
2829 if (!b->ptr)
2830 PerlIO_get_base(f);
2831 return PerlIOBase_read(f, vbuf, count);
2832 }
2833 return 0;
6f9d8c32
NIS		 2834}
2835
9e353e3b
NIS		 2836SSize_t
2837PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2838{
14a5cf38
JH		 2839 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2840 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2841 SSize_t unread = 0;
2842 SSize_t avail;
2843 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2844 PerlIO_flush(f);
2845 if (!b->buf)
2846 PerlIO_get_base(f);
2847 if (b->buf) {
2848 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2849 /*
2850 * Buffer is already a read buffer, we can overwrite any chars
71200d45 2851 * which have been read back to buffer start
14a5cf38
JH		 2852 */
2853 avail = (b->ptr - b->buf);
2854 }
2855 else {
2856 /*
2857 * Buffer is idle, set it up so whole buffer is available for
71200d45 2858 * unread
14a5cf38
JH		 2859 */
2860 avail = b->bufsiz;
2861 b->end = b->buf + avail;
2862 b->ptr = b->end;
2863 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2864 /*
71200d45 2865 * Buffer extends _back_ from where we are now
14a5cf38
JH		 2866 */
2867 b->posn -= b->bufsiz;
2868 }
2869 if (avail > (SSize_t) count) {
2870 /*
71200d45 2871 * If we have space for more than count, just move count
14a5cf38
JH		 2872 */
2873 avail = count;
2874 }
2875 if (avail > 0) {
2876 b->ptr -= avail;
2877 buf -= avail;
2878 /*
2879 * In simple stdio-like ungetc() case chars will be already
71200d45 2880 * there
14a5cf38
JH		 2881 */
2882 if (buf != b->ptr) {
2883 Copy(buf, b->ptr, avail, STDCHAR);
2884 }
2885 count -= avail;
2886 unread += avail;
2887 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2888 }
2889 }
2890 return unread;
760ac839
LW		 2891}
2892
9e353e3b
NIS		 2893SSize_t
2894PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2895{
14a5cf38
JH		 2896 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2897 const STDCHAR *buf = (const STDCHAR *) vbuf;
2898 Size_t written = 0;
2899 if (!b->buf)
2900 PerlIO_get_base(f);
2901 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2902 return 0;
2903 while (count > 0) {
2904 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2905 if ((SSize_t) count < avail)
2906 avail = count;
2907 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2908 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2909 while (avail > 0) {
2910 int ch = *buf++;
2911 *(b->ptr)++ = ch;
2912 count--;
2913 avail--;
2914 written++;
2915 if (ch == '\n') {
2916 PerlIO_flush(f);
2917 break;
2918 }
2919 }
2920 }
2921 else {
2922 if (avail) {
2923 Copy(buf, b->ptr, avail, STDCHAR);
2924 count -= avail;
2925 buf += avail;
2926 written += avail;
2927 b->ptr += avail;
2928 }
2929 }
2930 if (b->ptr >= (b->buf + b->bufsiz))
2931 PerlIO_flush(f);
2932 }
2933 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2934 PerlIO_flush(f);
2935 return written;
9e353e3b
NIS		 2936}
2937
2938IV
2939PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2940{
14a5cf38
JH		 2941 IV code;
2942 if ((code = PerlIO_flush(f)) == 0) {
2943 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2944 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2945 code = PerlIO_seek(PerlIONext(f), offset, whence);
2946 if (code == 0) {
2947 b->posn = PerlIO_tell(PerlIONext(f));
2948 }
9e353e3b 2949 }
14a5cf38 2950 return code;
9e353e3b
NIS		 2951}
2952
2953Off_t
2954PerlIOBuf_tell(PerlIO *f)
2955{
14a5cf38
JH		 2956 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2957 /*
71200d45 2958 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 2959 */
2960 Off_t posn = b->posn;
2961 if (b->buf) {
2962 /*
71200d45 2963 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 2964 */
2965 posn += (b->ptr - b->buf);
2966 }
2967 return posn;
9e353e3b
NIS		 2968}
2969
2970IV
2971PerlIOBuf_close(PerlIO *f)
2972{
14a5cf38
JH		 2973 IV code = PerlIOBase_close(f);
2974 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2975 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
2976 PerlMemShared_free(b->buf);
2977 }
2978 b->buf = NULL;
2979 b->ptr = b->end = b->buf;
2980 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2981 return code;
760ac839
LW		 2982}
2983
9e353e3b
NIS		 2984STDCHAR *
2985PerlIOBuf_get_ptr(PerlIO *f)
2986{
14a5cf38
JH		 2987 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2988 if (!b->buf)
2989 PerlIO_get_base(f);
2990 return b->ptr;
9e353e3b
NIS		 2991}
2992
05d1247b 2993SSize_t
9e353e3b
NIS		 2994PerlIOBuf_get_cnt(PerlIO *f)
2995{
14a5cf38
JH		 2996 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2997 if (!b->buf)
2998 PerlIO_get_base(f);
2999 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3000 return (b->end - b->ptr);
3001 return 0;
9e353e3b
NIS		 3002}
3003
3004STDCHAR *
3005PerlIOBuf_get_base(PerlIO *f)
3006{
14a5cf38
JH		 3007 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3008 if (!b->buf) {
3009 if (!b->bufsiz)
3010 b->bufsiz = 4096;
3011 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
3012 if (!b->buf) {
3013 b->buf = (STDCHAR *) & b->oneword;
3014 b->bufsiz = sizeof(b->oneword);
3015 }
3016 b->ptr = b->buf;
3017 b->end = b->ptr;
06da4f11 3018 }
14a5cf38 3019 return b->buf;
9e353e3b
NIS		 3020}
3021
3022Size_t
3023PerlIOBuf_bufsiz(PerlIO *f)
3024{
14a5cf38
JH		 3025 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3026 if (!b->buf)
3027 PerlIO_get_base(f);
3028 return (b->end - b->buf);
9e353e3b
NIS		 3029}
3030
3031void
14a5cf38 3032PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3033{
14a5cf38
JH		 3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3035 if (!b->buf)
3036 PerlIO_get_base(f);
3037 b->ptr = ptr;
3038 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3039 dTHX;
3040 assert(PerlIO_get_cnt(f) == cnt);
3041 assert(b->ptr >= b->buf);
3042 }
3043 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3044}
3045
71200d45 3046PerlIO *
8cf8f3d1 3047PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3048{
a8fc9800 3049 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3050}
3051
3052
3053
9e353e3b 3054PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3055 "perlio",
3056 sizeof(PerlIOBuf),
3057 PERLIO_K_BUFFERED,
3058 PerlIOBuf_pushed,
3059 PerlIOBase_noop_ok,
3060 PerlIOBuf_open,
3061 NULL,
3062 PerlIOBase_fileno,
71200d45 3063 PerlIOBuf_dup,
14a5cf38
JH		 3064 PerlIOBuf_read,
3065 PerlIOBuf_unread,
3066 PerlIOBuf_write,
3067 PerlIOBuf_seek,
3068 PerlIOBuf_tell,
3069 PerlIOBuf_close,
3070 PerlIOBuf_flush,
3071 PerlIOBuf_fill,
3072 PerlIOBase_eof,
3073 PerlIOBase_error,
3074 PerlIOBase_clearerr,
3075 PerlIOBase_setlinebuf,
3076 PerlIOBuf_get_base,
3077 PerlIOBuf_bufsiz,
3078 PerlIOBuf_get_ptr,
3079 PerlIOBuf_get_cnt,
3080 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3081};
3082
66ecd56b 3083/*--------------------------------------------------------------------------------------*/
14a5cf38 3084/*
71200d45 3085 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3086 */
5e2ab84b
NIS		 3087
3088IV
3089PerlIOPending_fill(PerlIO *f)
3090{
14a5cf38 3091 /*
71200d45 3092 * Should never happen
14a5cf38
JH		 3093 */
3094 PerlIO_flush(f);
3095 return 0;
5e2ab84b
NIS		 3096}
3097
3098IV
3099PerlIOPending_close(PerlIO *f)
3100{
14a5cf38 3101 /*
71200d45 3102 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3103 */
3104 PerlIO_flush(f);
3105 return PerlIO_close(f);
5e2ab84b
NIS		 3106}
3107
3108IV
3109PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3110{
14a5cf38 3111 /*
71200d45 3112 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3113 */
3114 PerlIO_flush(f);
3115 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3116}
3117
3118
3119IV
3120PerlIOPending_flush(PerlIO *f)
3121{
14a5cf38
JH		 3122 dTHX;
3123 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3124 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3125 PerlMemShared_free(b->buf);
3126 b->buf = NULL;
3127 }
3128 PerlIO_pop(aTHX_ f);
3129 return 0;
5e2ab84b
NIS		 3130}
3131
3132void
14a5cf38 3133PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3134{
14a5cf38
JH		 3135 if (cnt <= 0) {
3136 PerlIO_flush(f);
3137 }
3138 else {
3139 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3140 }
5e2ab84b
NIS		 3141}
3142
3143IV
14a5cf38 3144PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3145{
14a5cf38
JH		 3146 IV code = PerlIOBase_pushed(f, mode, arg);
3147 PerlIOl *l = PerlIOBase(f);
3148 /*
71200d45
NIS		 3149 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3150 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3151 */
3152 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3153 (PerlIOBase(PerlIONext(f))->
3154 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3155 return code;
5e2ab84b
NIS		 3156}
3157
3158SSize_t
3159PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3160{
14a5cf38
JH		 3161 SSize_t avail = PerlIO_get_cnt(f);
3162 SSize_t got = 0;
3163 if (count < avail)
3164 avail = count;
3165 if (avail > 0)
3166 got = PerlIOBuf_read(f, vbuf, avail);
3167 if (got >= 0 && got < count) {
3168 SSize_t more =
3169 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3170 if (more >= 0 || got == 0)
3171 got += more;
3172 }
3173 return got;
5e2ab84b
NIS		 3174}
3175
5e2ab84b 3176PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3177 "pending",
3178 sizeof(PerlIOBuf),
3179 PERLIO_K_BUFFERED,
3180 PerlIOPending_pushed,
3181 PerlIOBase_noop_ok,
3182 NULL,
3183 NULL,
3184 PerlIOBase_fileno,
71200d45 3185 PerlIOBuf_dup,
14a5cf38
JH		 3186 PerlIOPending_read,
3187 PerlIOBuf_unread,
3188 PerlIOBuf_write,
3189 PerlIOPending_seek,
3190 PerlIOBuf_tell,
3191 PerlIOPending_close,
3192 PerlIOPending_flush,
3193 PerlIOPending_fill,
3194 PerlIOBase_eof,
3195 PerlIOBase_error,
3196 PerlIOBase_clearerr,
3197 PerlIOBase_setlinebuf,
3198 PerlIOBuf_get_base,
3199 PerlIOBuf_bufsiz,
3200 PerlIOBuf_get_ptr,
3201 PerlIOBuf_get_cnt,
3202 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3203};
3204
3205
3206
3207/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3208/*
3209 * crlf - translation On read translate CR,LF to "\n" we do this by
3210 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3211 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3212 */
3213
14a5cf38
JH		 3214typedef struct {
3215 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3216 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3217 * buffer */
99efab12
NIS		 3218} PerlIOCrlf;
3219
f5b9d040 3220IV
14a5cf38 3221PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3222{
14a5cf38
JH		 3223 IV code;
3224 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3225 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3226#if 0
14a5cf38
JH		 3227 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3228 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3229 PerlIOBase(f)->flags);
5e2ab84b 3230#endif
14a5cf38 3231 return code;
f5b9d040
NIS		 3232}
3233
3234
99efab12
NIS		 3235SSize_t
3236PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3237{
14a5cf38
JH		 3238 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3239 if (c->nl) {
3240 *(c->nl) = 0xd;
3241 c->nl = NULL;
3242 }
3243 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3244 return PerlIOBuf_unread(f, vbuf, count);
3245 else {
3246 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3247 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3248 SSize_t unread = 0;
3249 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3250 PerlIO_flush(f);
3251 if (!b->buf)
3252 PerlIO_get_base(f);
3253 if (b->buf) {
3254 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3255 b->end = b->ptr = b->buf + b->bufsiz;
3256 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3257 b->posn -= b->bufsiz;
3258 }
3259 while (count > 0 && b->ptr > b->buf) {
3260 int ch = *--buf;
3261 if (ch == '\n') {
3262 if (b->ptr - 2 >= b->buf) {
3263 *--(b->ptr) = 0xa;
3264 *--(b->ptr) = 0xd;
3265 unread++;
3266 count--;
3267 }
3268 else {
3269 buf++;
3270 break;
3271 }
3272 }
3273 else {
3274 *--(b->ptr) = ch;
3275 unread++;
3276 count--;
3277 }
3278 }
3279 }
3280 return unread;
3281 }
99efab12
NIS		 3282}
3283
3284SSize_t
3285PerlIOCrlf_get_cnt(PerlIO *f)
3286{
14a5cf38
JH		 3287 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3288 if (!b->buf)
3289 PerlIO_get_base(f);
3290 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3291 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3292 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3293 STDCHAR *nl = b->ptr;
3294 scan:
3295 while (nl < b->end && *nl != 0xd)
3296 nl++;
3297 if (nl < b->end && *nl == 0xd) {
3298 test:
3299 if (nl + 1 < b->end) {
3300 if (nl[1] == 0xa) {
3301 *nl = '\n';
3302 c->nl = nl;
3303 }
3304 else {
3305 /*
71200d45 3306 * Not CR,LF but just CR
14a5cf38
JH		 3307 */
3308 nl++;
3309 goto scan;
3310 }
3311 }
3312 else {
3313 /*
71200d45 3314 * Blast - found CR as last char in buffer
14a5cf38
JH		 3315 */
3316 if (b->ptr < nl) {
3317 /*
3318 * They may not care, defer work as long as
71200d45 3319 * possible
14a5cf38
JH		 3320 */
3321 return (nl - b->ptr);
3322 }
3323 else {
3324 int code;
3325 b->ptr++; /* say we have read it as far as
3326 * flush() is concerned */
3327 b->buf++; /* Leave space an front of buffer */
3328 b->bufsiz--; /* Buffer is thus smaller */
3329 code = PerlIO_fill(f); /* Fetch some more */
3330 b->bufsiz++; /* Restore size for next time */
3331 b->buf--; /* Point at space */
3332 b->ptr = nl = b->buf; /* Which is what we hand
3333 * off */
3334 b->posn--; /* Buffer starts here */
3335 *nl = 0xd; /* Fill in the CR */
3336 if (code == 0)
3337 goto test; /* fill() call worked */
3338 /*
71200d45 3339 * CR at EOF - just fall through
14a5cf38
JH		 3340 */
3341 }
3342 }
3343 }
3344 }
3345 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3346 }
3347 return 0;
99efab12
NIS		 3348}
3349
3350void
14a5cf38
JH		 3351PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3352{
3353 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3354 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3355 IV flags = PerlIOBase(f)->flags;
3356 if (!b->buf)
3357 PerlIO_get_base(f);
3358 if (!ptr) {
3359 if (c->nl)
3360 ptr = c->nl + 1;
3361 else {
3362 ptr = b->end;
3363 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3364 ptr--;
3365 }
3366 ptr -= cnt;
3367 }
3368 else {
3369 /*
71200d45 3370 * Test code - delete when it works ...
14a5cf38
JH		 3371 */
3372 STDCHAR *chk;
3373 if (c->nl)
3374 chk = c->nl + 1;
3375 else {
3376 chk = b->end;
3377 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3378 chk--;
3379 }
3380 chk -= cnt;
3381
3382 if (ptr != chk) {
3383 dTHX;
3384 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3385 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3386 b->end, cnt);
3387 }
3388 }
3389 if (c->nl) {
3390 if (ptr > c->nl) {
3391 /*
71200d45 3392 * They have taken what we lied about
14a5cf38
JH		 3393 */
3394 *(c->nl) = 0xd;
3395 c->nl = NULL;
3396 ptr++;
3397 }
3398 }
3399 b->ptr = ptr;
3400 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3401}
3402
3403SSize_t
3404PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3405{
14a5cf38
JH		 3406 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3407 return PerlIOBuf_write(f, vbuf, count);
3408 else {
3409 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3410 const STDCHAR *buf = (const STDCHAR *) vbuf;
3411 const STDCHAR *ebuf = buf + count;
3412 if (!b->buf)
3413 PerlIO_get_base(f);
3414 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3415 return 0;
3416 while (buf < ebuf) {
3417 STDCHAR *eptr = b->buf + b->bufsiz;
3418 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3419 while (buf < ebuf && b->ptr < eptr) {
3420 if (*buf == '\n') {
3421 if ((b->ptr + 2) > eptr) {
3422 /*
71200d45 3423 * Not room for both
14a5cf38
JH		 3424 */
3425 PerlIO_flush(f);
3426 break;
3427 }
3428 else {
3429 *(b->ptr)++ = 0xd; /* CR */
3430 *(b->ptr)++ = 0xa; /* LF */
3431 buf++;
3432 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3433 PerlIO_flush(f);
3434 break;
3435 }
3436 }
3437 }
3438 else {
3439 int ch = *buf++;
3440 *(b->ptr)++ = ch;
3441 }
3442 if (b->ptr >= eptr) {
3443 PerlIO_flush(f);
3444 break;
3445 }
3446 }
3447 }
3448 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3449 PerlIO_flush(f);
3450 return (buf - (STDCHAR *) vbuf);
3451 }
99efab12
NIS		 3452}
3453
3454IV
3455PerlIOCrlf_flush(PerlIO *f)
3456{
14a5cf38
JH		 3457 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3458 if (c->nl) {
3459 *(c->nl) = 0xd;
3460 c->nl = NULL;
3461 }
3462 return PerlIOBuf_flush(f);
99efab12
NIS		 3463}
3464
66ecd56b 3465PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3466 "crlf",
3467 sizeof(PerlIOCrlf),
3468 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3469 PerlIOCrlf_pushed,
3470 PerlIOBase_noop_ok, /* popped */
3471 PerlIOBuf_open,
3472 NULL,
3473 PerlIOBase_fileno,
71200d45 3474 PerlIOBuf_dup,
14a5cf38
JH		 3475 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3476 * ... */
3477 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3478 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3479 PerlIOBuf_seek,
3480 PerlIOBuf_tell,
3481 PerlIOBuf_close,
3482 PerlIOCrlf_flush,
3483 PerlIOBuf_fill,
3484 PerlIOBase_eof,
3485 PerlIOBase_error,
3486 PerlIOBase_clearerr,
3487 PerlIOBase_setlinebuf,
3488 PerlIOBuf_get_base,
3489 PerlIOBuf_bufsiz,
3490 PerlIOBuf_get_ptr,
3491 PerlIOCrlf_get_cnt,
3492 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3493};
3494
06da4f11
NIS		 3495#ifdef HAS_MMAP
3496/*--------------------------------------------------------------------------------------*/
14a5cf38 3497/*
71200d45 3498 * mmap as "buffer" layer
14a5cf38 3499 */
06da4f11 3500
14a5cf38
JH		 3501typedef struct {
3502 PerlIOBuf base; /* PerlIOBuf stuff */
3503 Mmap_t mptr; /* Mapped address */
3504 Size_t len; /* mapped length */
3505 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3506} PerlIOMmap;
3507
c3d7c7c9
NIS		 3508static size_t page_size = 0;
3509
06da4f11
NIS		 3510IV
3511PerlIOMmap_map(PerlIO *f)
3512{
14a5cf38
JH		 3513 dTHX;
3514 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3515 IV flags = PerlIOBase(f)->flags;
3516 IV code = 0;
3517 if (m->len)
3518 abort();
3519 if (flags & PERLIO_F_CANREAD) {
3520 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3521 int fd = PerlIO_fileno(f);
3522 struct stat st;
3523 code = fstat(fd, &st);
3524 if (code == 0 && S_ISREG(st.st_mode)) {
3525 SSize_t len = st.st_size - b->posn;
3526 if (len > 0) {
3527 Off_t posn;
3528 if (!page_size) {
68d873c6 3529#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3530 {
3531 SETERRNO(0, SS$_NORMAL);
68d873c6 3532# ifdef _SC_PAGESIZE
14a5cf38 3533 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3534# else
14a5cf38 3535 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3536# endif
14a5cf38
JH		 3537 if ((long) page_size < 0) {
3538 if (errno) {
3539 SV *error = ERRSV;
3540 char *msg;
3541 STRLEN n_a;
3542 (void) SvUPGRADE(error, SVt_PV);
3543 msg = SvPVx(error, n_a);
3544 Perl_croak(aTHX_ "panic: sysconf: %s",
3545 msg);
3546 }
3547 else
3548 Perl_croak(aTHX_
3549 "panic: sysconf: pagesize unknown");
3550 }
3551 }
68d873c6
JH		 3552#else
3553# ifdef HAS_GETPAGESIZE
14a5cf38 3554 page_size = getpagesize();
68d873c6
JH		 3555# else
3556# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3557 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3558# endif
3559# endif
3560#endif
14a5cf38
JH		 3561 if ((IV) page_size <= 0)
3562 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3563 (IV) page_size);
3564 }
3565 if (b->posn < 0) {
3566 /*
3567 * This is a hack - should never happen - open should
71200d45 3568 * have set it !
14a5cf38
JH		 3569 */
3570 b->posn = PerlIO_tell(PerlIONext(f));
3571 }
3572 posn = (b->posn / page_size) * page_size;
3573 len = st.st_size - posn;
3574 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3575 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3576#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3577 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3578#endif
a5262162 3579#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3580 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3581#endif
14a5cf38
JH		 3582 PerlIOBase(f)->flags =
3583 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3584 b->end = ((STDCHAR *) m->mptr) + len;
3585 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3586 b->ptr = b->buf;
3587 m->len = len;
3588 }
3589 else {
3590 b->buf = NULL;
3591 }
3592 }
3593 else {
3594 PerlIOBase(f)->flags =
3595 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3596 b->buf = NULL;
3597 b->ptr = b->end = b->ptr;
3598 code = -1;
3599 }
3600 }
3601 }
3602 return code;
06da4f11
NIS		 3603}
3604
3605IV
3606PerlIOMmap_unmap(PerlIO *f)
3607{
14a5cf38
JH		 3608 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3609 PerlIOBuf *b = &m->base;
3610 IV code = 0;
3611 if (m->len) {
3612 if (b->buf) {
3613 code = munmap(m->mptr, m->len);
3614 b->buf = NULL;
3615 m->len = 0;
3616 m->mptr = NULL;
3617 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3618 code = -1;
3619 }
3620 b->ptr = b->end = b->buf;
3621 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3622 }
3623 return code;
06da4f11
NIS		 3624}
3625
3626STDCHAR *
3627PerlIOMmap_get_base(PerlIO *f)
3628{
14a5cf38
JH		 3629 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3630 PerlIOBuf *b = &m->base;
3631 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3632 /*
71200d45 3633 * Already have a readbuffer in progress
14a5cf38
JH		 3634 */
3635 return b->buf;
3636 }
3637 if (b->buf) {
3638 /*
71200d45 3639 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3640 */
3641 m->bbuf = b->buf; /* save it in case we need it again */
3642 b->buf = NULL; /* Clear to trigger below */
3643 }
3644 if (!b->buf) {
3645 PerlIOMmap_map(f); /* Try and map it */
3646 if (!b->buf) {
3647 /*
71200d45 3648 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3649 */
3650 b->buf = m->bbuf;
3651 }
3652 }
3653 b->ptr = b->end = b->buf;
3654 if (b->buf)
3655 return b->buf;
3656 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3657}
3658
3659SSize_t
3660PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3661{
14a5cf38
JH		 3662 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3663 PerlIOBuf *b = &m->base;
3664 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3665 PerlIO_flush(f);
3666 if (b->ptr && (b->ptr - count) >= b->buf
3667 && memEQ(b->ptr - count, vbuf, count)) {
3668 b->ptr -= count;
3669 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3670 return count;
3671 }
3672 if (m->len) {
3673 /*
71200d45 3674 * Loose the unwritable mapped buffer
14a5cf38
JH		 3675 */
3676 PerlIO_flush(f);
3677 /*
71200d45 3678 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3679 */
3680 if (!b->buf && m->bbuf)
3681 b->buf = m->bbuf;
3682 if (!b->buf) {
3683 PerlIOBuf_get_base(f);
3684 m->bbuf = b->buf;
3685 }
3686 }
3687 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3688}
3689
3690SSize_t
3691PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3692{
14a5cf38
JH		 3693 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3694 PerlIOBuf *b = &m->base;
3695 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3696 /*
71200d45 3697 * No, or wrong sort of, buffer
14a5cf38
JH		 3698 */
3699 if (m->len) {
3700 if (PerlIOMmap_unmap(f) != 0)
3701 return 0;
3702 }
3703 /*
71200d45 3704 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3705 */
3706 if (!b->buf && m->bbuf)
3707 b->buf = m->bbuf;
3708 if (!b->buf) {
3709 PerlIOBuf_get_base(f);
3710 m->bbuf = b->buf;
3711 }
06da4f11 3712 }
14a5cf38 3713 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3714}
3715
3716IV
3717PerlIOMmap_flush(PerlIO *f)
3718{
14a5cf38
JH		 3719 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3720 PerlIOBuf *b = &m->base;
3721 IV code = PerlIOBuf_flush(f);
3722 /*
71200d45 3723 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3724 */
3725 if (b->buf) {
3726 if (m->len) {
3727 /*
71200d45 3728 * Unmap the buffer
14a5cf38
JH		 3729 */
3730 if (PerlIOMmap_unmap(f) != 0)
3731 code = -1;
3732 }
3733 else {
3734 /*
3735 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3736 * remember it in case we need one later
14a5cf38
JH		 3737 */
3738 m->bbuf = b->buf;
3739 }
3740 }
3741 return code;
06da4f11
NIS		 3742}
3743
3744IV
3745PerlIOMmap_fill(PerlIO *f)
3746{
14a5cf38
JH		 3747 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3748 IV code = PerlIO_flush(f);
3749 if (code == 0 && !b->buf) {
3750 code = PerlIOMmap_map(f);
3751 }
3752 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3753 code = PerlIOBuf_fill(f);
3754 }
3755 return code;
06da4f11
NIS		 3756}
3757
3758IV
3759PerlIOMmap_close(PerlIO *f)
3760{
14a5cf38
JH		 3761 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3762 PerlIOBuf *b = &m->base;
3763 IV code = PerlIO_flush(f);
3764 if (m->bbuf) {
3765 b->buf = m->bbuf;
3766 m->bbuf = NULL;
3767 b->ptr = b->end = b->buf;
3768 }
3769 if (PerlIOBuf_close(f) != 0)
3770 code = -1;
3771 return code;
06da4f11
NIS		 3772}
3773
71200d45 3774PerlIO *
8cf8f3d1 3775PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3776{
a8fc9800 3777 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3778}
3779
06da4f11
NIS		 3780
3781PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3782 "mmap",
3783 sizeof(PerlIOMmap),
3784 PERLIO_K_BUFFERED,
3785 PerlIOBuf_pushed,
3786 PerlIOBase_noop_ok,
3787 PerlIOBuf_open,
3788 NULL,
3789 PerlIOBase_fileno,
71200d45 3790 PerlIOMmap_dup,
14a5cf38
JH		 3791 PerlIOBuf_read,
3792 PerlIOMmap_unread,
3793 PerlIOMmap_write,
3794 PerlIOBuf_seek,
3795 PerlIOBuf_tell,
3796 PerlIOBuf_close,
3797 PerlIOMmap_flush,
3798 PerlIOMmap_fill,
3799 PerlIOBase_eof,
3800 PerlIOBase_error,
3801 PerlIOBase_clearerr,
3802 PerlIOBase_setlinebuf,
3803 PerlIOMmap_get_base,
3804 PerlIOBuf_bufsiz,
3805 PerlIOBuf_get_ptr,
3806 PerlIOBuf_get_cnt,
3807 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3808};
3809
14a5cf38 3810#endif /* HAS_MMAP */
06da4f11 3811
9e353e3b
NIS		 3812void
3813PerlIO_init(void)
760ac839 3814{
14a5cf38 3815 dTHX;
43c11ae3 3816#ifndef WIN32
14a5cf38 3817 call_atexit(PerlIO_cleanup_layers, NULL);
43c11ae3 3818#endif
14a5cf38 3819 if (!_perlio) {
be696b0a 3820#ifndef WIN32
14a5cf38 3821 atexit(&PerlIO_cleanup);
be696b0a 3822#endif
14a5cf38 3823 }
760ac839
LW		 3824}
3825
9e353e3b
NIS		 3826#undef PerlIO_stdin
3827PerlIO *
3828PerlIO_stdin(void)
3829{
14a5cf38
JH		 3830 if (!_perlio) {
3831 dTHX;
3832 PerlIO_stdstreams(aTHX);
3833 }
3834 return &_perlio[1];
9e353e3b
NIS		 3835}
3836
3837#undef PerlIO_stdout
3838PerlIO *
3839PerlIO_stdout(void)
3840{
14a5cf38
JH		 3841 if (!_perlio) {
3842 dTHX;
3843 PerlIO_stdstreams(aTHX);
3844 }
3845 return &_perlio[2];
9e353e3b
NIS		 3846}
3847
3848#undef PerlIO_stderr
3849PerlIO *
3850PerlIO_stderr(void)
3851{
14a5cf38
JH		 3852 if (!_perlio) {
3853 dTHX;
3854 PerlIO_stdstreams(aTHX);
3855 }
3856 return &_perlio[3];
9e353e3b
NIS		 3857}
3858
3859/*--------------------------------------------------------------------------------------*/
3860
3861#undef PerlIO_getname
3862char *
3863PerlIO_getname(PerlIO *f, char *buf)
3864{
14a5cf38
JH		 3865 dTHX;
3866 char *name = NULL;
a15cef0c 3867#ifdef VMS
14a5cf38
JH		 3868 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3869 if (stdio)
3870 name = fgetname(stdio, buf);
a15cef0c 3871#else
14a5cf38 3872 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 3873#endif
14a5cf38 3874 return name;
9e353e3b
NIS		 3875}
3876
3877
3878/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3879/*
3880 * Functions which can be called on any kind of PerlIO implemented in
71200d45 3881 * terms of above
14a5cf38 3882 */
9e353e3b
NIS		 3883
3884#undef PerlIO_getc
6f9d8c32 3885int
9e353e3b 3886PerlIO_getc(PerlIO *f)
760ac839 3887{
14a5cf38
JH		 3888 STDCHAR buf[1];
3889 SSize_t count = PerlIO_read(f, buf, 1);
3890 if (count == 1) {
3891 return (unsigned char) buf[0];
3892 }
3893 return EOF;
313ca112
NIS		 3894}
3895
3896#undef PerlIO_ungetc
3897int
3898PerlIO_ungetc(PerlIO *f, int ch)
3899{
14a5cf38
JH		 3900 if (ch != EOF) {
3901 STDCHAR buf = ch;
3902 if (PerlIO_unread(f, &buf, 1) == 1)
3903 return ch;
3904 }
3905 return EOF;
760ac839
LW		 3906}
3907
9e353e3b
NIS		 3908#undef PerlIO_putc
3909int
3910PerlIO_putc(PerlIO *f, int ch)
760ac839 3911{
14a5cf38
JH		 3912 STDCHAR buf = ch;
3913 return PerlIO_write(f, &buf, 1);
760ac839
LW		 3914}
3915
9e353e3b 3916#undef PerlIO_puts
760ac839 3917int
9e353e3b 3918PerlIO_puts(PerlIO *f, const char *s)
760ac839 3919{
14a5cf38
JH		 3920 STRLEN len = strlen(s);
3921 return PerlIO_write(f, s, len);
760ac839
LW		 3922}
3923
3924#undef PerlIO_rewind
3925void
c78749f2 3926PerlIO_rewind(PerlIO *f)
760ac839 3927{
14a5cf38
JH		 3928 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3929 PerlIO_clearerr(f);
6f9d8c32
NIS		 3930}
3931
3932#undef PerlIO_vprintf
3933int
3934PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3935{
14a5cf38
JH		 3936 dTHX;
3937 SV *sv = newSVpvn("", 0);
3938 char *s;
3939 STRLEN len;
3940 SSize_t wrote;
2cc61e15 3941#ifdef NEED_VA_COPY
14a5cf38
JH		 3942 va_list apc;
3943 Perl_va_copy(ap, apc);
3944 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 3945#else
14a5cf38 3946 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 3947#endif
14a5cf38
JH		 3948 s = SvPV(sv, len);
3949 wrote = PerlIO_write(f, s, len);
3950 SvREFCNT_dec(sv);
3951 return wrote;
760ac839
LW		 3952}
3953
3954#undef PerlIO_printf
6f9d8c32 3955int
14a5cf38 3956PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 3957{
14a5cf38
JH		 3958 va_list ap;
3959 int result;
3960 va_start(ap, fmt);
3961 result = PerlIO_vprintf(f, fmt, ap);
3962 va_end(ap);
3963 return result;
760ac839
LW		 3964}
3965
3966#undef PerlIO_stdoutf
6f9d8c32 3967int
14a5cf38 3968PerlIO_stdoutf(const char *fmt, ...)
760ac839 3969{
14a5cf38
JH		 3970 va_list ap;
3971 int result;
3972 va_start(ap, fmt);
3973 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
3974 va_end(ap);
3975 return result;
760ac839
LW		 3976}
3977
3978#undef PerlIO_tmpfile
3979PerlIO *
c78749f2 3980PerlIO_tmpfile(void)
760ac839 3981{
14a5cf38 3982 /*
71200d45 3983 * I have no idea how portable mkstemp() is ...
14a5cf38 3984 */
83b075c3 3985#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 3986 dTHX;
3987 PerlIO *f = NULL;
3988 FILE *stdio = PerlSIO_tmpfile();
3989 if (stdio) {
3990 PerlIOStdio *s =
3991 PerlIOSelf(PerlIO_push
3992 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
3993 "w+", Nullsv), PerlIOStdio);
3994 s->stdio = stdio;
3995 }
3996 return f;
83b075c3 3997#else
14a5cf38
JH		 3998 dTHX;
3999 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4000 int fd = mkstemp(SvPVX(sv));
4001 PerlIO *f = NULL;
4002 if (fd >= 0) {
4003 f = PerlIO_fdopen(fd, "w+");
4004 if (f) {
4005 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4006 }
4007 PerlLIO_unlink(SvPVX(sv));
4008 SvREFCNT_dec(sv);
4009 }
4010 return f;
83b075c3 4011#endif
760ac839
LW		 4012}
4013
6f9d8c32
NIS		 4014#undef HAS_FSETPOS
4015#undef HAS_FGETPOS
4016
14a5cf38
JH		 4017#endif /* USE_SFIO */
4018#endif /* PERLIO_IS_STDIO */
760ac839 4019
9e353e3b 4020/*======================================================================================*/
14a5cf38 4021/*
71200d45
NIS		 4022 * Now some functions in terms of above which may be needed even if we are
4023 * not in true PerlIO mode
9e353e3b
NIS		 4024 */
4025
760ac839
LW		 4026#ifndef HAS_FSETPOS
4027#undef PerlIO_setpos
4028int
766a733e 4029PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 4030{
14a5cf38
JH		 4031 dTHX;
4032 if (SvOK(pos)) {
4033 STRLEN len;
4034 Off_t *posn = (Off_t *) SvPV(pos, len);
4035 if (f && len == sizeof(Off_t))
4036 return PerlIO_seek(f, *posn, SEEK_SET);
4037 }
4038 SETERRNO(EINVAL, SS$_IVCHAN);
4039 return -1;
760ac839 4040}
c411622e 4041#else
c411622e 4042#undef PerlIO_setpos
4043int
766a733e 4044PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 4045{
14a5cf38
JH		 4046 dTHX;
4047 if (SvOK(pos)) {
4048 STRLEN len;
4049 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4050 if (f && len == sizeof(Fpos_t)) {
2d4389e4 4051