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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
60382766 43int
f5b9d040 44perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 45{
14a5cf38 46 /*
71200d45 47 * This used to be contents of do_binmode in doio.c
14a5cf38 48 */
60382766
NIS		 49#ifdef DOSISH
50# if defined(atarist) || defined(__MINT__)
f5b9d040 51 if (!fflush(fp)) {
60382766 52 if (mode & O_BINARY)
14a5cf38 53 ((FILE *) fp)->_flag |= _IOBIN;
60382766 54 else
14a5cf38 55 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 56 return 1;
57 }
58 return 0;
59# else
eb73beca 60 dTHX;
14a5cf38
JH		 61#ifdef NETWARE
62 if (PerlLIO_setmode(fp, mode) != -1) {
63#else
f5b9d040 64 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 65#endif
60382766 66# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 67 /*
71200d45 68 * The translation mode of the stream is maintained independent of
14a5cf38 69 * the translation mode of the fd in the Borland RTL (heavy
71200d45 70 * digging through their runtime sources reveal). User has to set
14a5cf38 71 * the mode explicitly for the stream (though they don't document
71200d45 72 * this anywhere). GSAR 97-5-24
60382766 73 */
14a5cf38 74 fseek(fp, 0L, 0);
60382766 75 if (mode & O_BINARY)
f5b9d040 76 fp->flags |= _F_BIN;
60382766 77 else
14a5cf38 78 fp->flags &= ~_F_BIN;
60382766
NIS		 79# endif
80 return 1;
81 }
82 else
83 return 0;
84# endif
85#else
86# if defined(USEMYBINMODE)
87 if (my_binmode(fp, iotype, mode) != FALSE)
88 return 1;
89 else
90 return 0;
91# else
92 return 1;
93# endif
94#endif
95}
96
06c7082d
NIS		 97#ifndef O_ACCMODE
98#define O_ACCMODE 3 /* Assume traditional implementation */
99#endif
100
101int
102PerlIO_intmode2str(int rawmode, char *mode, int *writing)
103{
104 int result = rawmode & O_ACCMODE;
105 int ix = 0;
106 int ptype;
107 switch (result) {
108 case O_RDONLY:
109 ptype = IoTYPE_RDONLY;
110 break;
111 case O_WRONLY:
112 ptype = IoTYPE_WRONLY;
113 break;
114 case O_RDWR:
115 default:
116 ptype = IoTYPE_RDWR;
117 break;
118 }
119 if (writing)
120 *writing = (result != O_RDONLY);
121
122 if (result == O_RDONLY) {
123 mode[ix++] = 'r';
124 }
125#ifdef O_APPEND
126 else if (rawmode & O_APPEND) {
127 mode[ix++] = 'a';
128 if (result != O_WRONLY)
129 mode[ix++] = '+';
130 }
131#endif
132 else {
133 if (result == O_WRONLY)
134 mode[ix++] = 'w';
135 else {
136 mode[ix++] = 'r';
137 mode[ix++] = '+';
138 }
139 }
140 if (rawmode & O_BINARY)
141 mode[ix++] = 'b';
142 mode[ix] = '\0';
143 return ptype;
144}
145
eb73beca
NIS		 146#ifndef PERLIO_LAYERS
147int
148PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
149{
14a5cf38
JH		 150 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
151 return 0;
152 }
153 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
154 /*
71200d45 155 * NOTREACHED
14a5cf38
JH		 156 */
157 return -1;
eb73beca
NIS		 158}
159
13621cfb
NIS		 160void
161PerlIO_destruct(pTHX)
162{
163}
164
f5b9d040
NIS		 165int
166PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
167{
92bff44d 168#ifdef USE_SFIO
14a5cf38 169 return 1;
92bff44d 170#else
14a5cf38 171 return perlsio_binmode(fp, iotype, mode);
92bff44d 172#endif
f5b9d040 173}
60382766 174
e0fa5af2
NIS		 175PerlIO *
176PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
177{
178 if (f) {
179 int fd = PerlLIO_dup(PerlIO_fileno(f));
180 if (fd >= 0) {
06c7082d
NIS		 181 char mode[8];
182 int omode = fcntl(fd, F_GETFL);
183 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 184 /* the r+ is a hack */
06c7082d 185 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS		 186 }
187 return NULL;
188 }
189 else {
190 SETERRNO(EBADF, SS$_IVCHAN);
191 }
192 return NULL;
193}
194
195
14a5cf38 196/*
71200d45 197 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 198 */
ee518936
NIS		 199
200PerlIO *
14a5cf38
JH		 201PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
202 int imode, int perm, PerlIO *old, int narg, SV **args)
203{
204 if (narg == 1) {
205 if (*args == &PL_sv_undef)
206 return PerlIO_tmpfile();
207 else {
208 char *name = SvPV_nolen(*args);
209 if (*mode == '#') {
210 fd = PerlLIO_open3(name, imode, perm);
211 if (fd >= 0)
212 return PerlIO_fdopen(fd, (char *) mode + 1);
213 }
214 else if (old) {
215 return PerlIO_reopen(name, mode, old);
216 }
217 else {
218 return PerlIO_open(name, mode);
219 }
220 }
221 }
222 else {
223 return PerlIO_fdopen(fd, (char *) mode);
224 }
225 return NULL;
ee518936
NIS		 226}
227
0c4f7ff0
NIS		 228XS(XS_PerlIO__Layer__find)
229{
14a5cf38
JH		 230 dXSARGS;
231 if (items < 2)
232 Perl_croak(aTHX_ "Usage class->find(name[,load])");
233 else {
234 char *name = SvPV_nolen(ST(1));
235 ST(0) = (strEQ(name, "crlf")
236 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
237 XSRETURN(1);
238 }
0c4f7ff0
NIS		 239}
240
241
242void
243Perl_boot_core_PerlIO(pTHX)
244{
14a5cf38 245 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 246}
247
ac27b0f5
NIS		 248#endif
249
32e30700 250
6f9d8c32 251#ifdef PERLIO_IS_STDIO
760ac839
LW		 252
253void
e8632036 254PerlIO_init(pTHX)
760ac839 255{
14a5cf38
JH		 256 /*
257 * Does nothing (yet) except force this file to be included in perl
71200d45 258 * binary. That allows this file to force inclusion of other functions
14a5cf38 259 * that may be required by loadable extensions e.g. for
71200d45 260 * FileHandle::tmpfile
14a5cf38 261 */
760ac839
LW		 262}
263
33dcbb9a 264#undef PerlIO_tmpfile
265PerlIO *
8ac85365 266PerlIO_tmpfile(void)
33dcbb9a 267{
14a5cf38 268 return tmpfile();
33dcbb9a 269}
270
14a5cf38 271#else /* PERLIO_IS_STDIO */
760ac839
LW		 272
273#ifdef USE_SFIO
274
275#undef HAS_FSETPOS
276#undef HAS_FGETPOS
277
14a5cf38
JH		 278/*
279 * This section is just to make sure these functions get pulled in from
71200d45 280 * libsfio.a
14a5cf38 281 */
760ac839
LW		 282
283#undef PerlIO_tmpfile
284PerlIO *
c78749f2 285PerlIO_tmpfile(void)
760ac839 286{
14a5cf38 287 return sftmp(0);
760ac839
LW		 288}
289
290void
e8632036 291PerlIO_init(pTHX)
760ac839 292{
14a5cf38
JH		 293 /*
294 * Force this file to be included in perl binary. Which allows this
295 * file to force inclusion of other functions that may be required by
71200d45 296 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 297 */
760ac839 298
14a5cf38 299 /*
71200d45 300 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 301 * results in a lot of lseek()s to regular files and lot of small
71200d45 302 * writes to pipes.
14a5cf38
JH		 303 */
304 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 305}
306
92bff44d
NIS		 307PerlIO *
308PerlIO_importFILE(FILE *stdio, int fl)
309{
14a5cf38
JH		 310 int fd = fileno(stdio);
311 PerlIO *r = PerlIO_fdopen(fd, "r+");
312 return r;
92bff44d
NIS		 313}
314
315FILE *
316PerlIO_findFILE(PerlIO *pio)
317{
14a5cf38
JH		 318 int fd = PerlIO_fileno(pio);
319 FILE *f = fdopen(fd, "r+");
320 PerlIO_flush(pio);
321 if (!f && errno == EINVAL)
322 f = fdopen(fd, "w");
323 if (!f && errno == EINVAL)
324 f = fdopen(fd, "r");
325 return f;
92bff44d
NIS		 326}
327
328
14a5cf38 329#else /* USE_SFIO */
6f9d8c32 330/*======================================================================================*/
14a5cf38 331/*
71200d45 332 * Implement all the PerlIO interface ourselves.
9e353e3b 333 */
760ac839 334
76ced9ad
NIS		 335#include "perliol.h"
336
14a5cf38
JH		 337/*
338 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 339 * files
14a5cf38 340 */
02f66e2f
NIS		 341#ifdef I_UNISTD
342#include <unistd.h>
343#endif
06da4f11
NIS		 344#ifdef HAS_MMAP
345#include <sys/mman.h>
346#endif
347
02f66e2f 348
14a5cf38
JH		 349void PerlIO_debug(const char *fmt, ...)
350 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 351
6f9d8c32 352void
14a5cf38
JH		 353PerlIO_debug(const char *fmt, ...)
354{
355 static int dbg = 0;
356 va_list ap;
357 dSYS;
358 va_start(ap, fmt);
359 if (!dbg) {
360 char *s = PerlEnv_getenv("PERLIO_DEBUG");
361 if (s && *s)
362 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
363 else
364 dbg = -1;
365 }
366 if (dbg > 0) {
367 dTHX;
70ace5da
NIS		 368#ifdef USE_ITHREADS
369 /* Use fixed buffer as sv_catpvf etc. needs SVs */
370 char buffer[1024];
371 char *s;
372 STRLEN len;
373 s = CopFILE(PL_curcop);
374 if (!s)
375 s = "(none)";
376 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
377 len = strlen(buffer);
378 vsprintf(buffer+len, fmt, ap);
379 PerlLIO_write(dbg, buffer, strlen(buffer));
380#else
14a5cf38
JH		 381 SV *sv = newSVpvn("", 0);
382 char *s;
383 STRLEN len;
384 s = CopFILE(PL_curcop);
385 if (!s)
386 s = "(none)";
387 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
388 (IV) CopLINE(PL_curcop));
389 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
390
391 s = SvPV(sv, len);
392 PerlLIO_write(dbg, s, len);
393 SvREFCNT_dec(sv);
70ace5da 394#endif
14a5cf38
JH		 395 }
396 va_end(ap);
6f9d8c32
NIS		 397}
398
9e353e3b
NIS		 399/*--------------------------------------------------------------------------------------*/
400
14a5cf38 401/*
71200d45 402 * Inner level routines
14a5cf38 403 */
9e353e3b 404
14a5cf38 405/*
71200d45 406 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 407 */
05d1247b 408#define PERLIO_TABLE_SIZE 64
6f9d8c32 409
760ac839 410PerlIO *
5f1a76d0 411PerlIO_allocate(pTHX)
6f9d8c32 412{
14a5cf38 413 /*
71200d45 414 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 415 */
416 PerlIO **last;
417 PerlIO *f;
a1ea730d 418 last = &PL_perlio;
14a5cf38
JH		 419 while ((f = *last)) {
420 int i;
421 last = (PerlIO **) (f);
422 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
423 if (!*++f) {
424 return f;
425 }
426 }
427 }
3a1ee7e8 428 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH		 429 if (!f) {
430 return NULL;
431 }
432 *last = f;
433 return f + 1;
05d1247b
NIS		 434}
435
a1ea730d
NIS		 436#undef PerlIO_fdupopen
437PerlIO *
438PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
439{
440 if (f && *f) {
441 PerlIO_funcs *tab = PerlIOBase(f)->tab;
442 PerlIO *new;
443 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
444 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
445 return new;
446 }
447 else {
448 SETERRNO(EBADF, SS$_IVCHAN);
449 return NULL;
450 }
451}
452
453void
5f1a76d0 454PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 455{
14a5cf38
JH		 456 PerlIO *table = *tablep;
457 if (table) {
458 int i;
459 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
460 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
461 PerlIO *f = table + i;
462 if (*f) {
463 PerlIO_close(f);
464 }
465 }
3a1ee7e8 466 Safefree(table);
14a5cf38 467 *tablep = NULL;
05d1247b 468 }
05d1247b
NIS		 469}
470
fcf2db38
NIS		 471
472PerlIO_list_t *
3a1ee7e8 473PerlIO_list_alloc(pTHX)
fcf2db38 474{
14a5cf38
JH		 475 PerlIO_list_t *list;
476 Newz('L', list, 1, PerlIO_list_t);
477 list->refcnt = 1;
478 return list;
fcf2db38
NIS		 479}
480
481void
3a1ee7e8 482PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 483{
14a5cf38
JH		 484 if (list) {
485 if (--list->refcnt == 0) {
486 if (list->array) {
14a5cf38
JH		 487 IV i;
488 for (i = 0; i < list->cur; i++) {
489 if (list->array[i].arg)
490 SvREFCNT_dec(list->array[i].arg);
491 }
492 Safefree(list->array);
493 }
494 Safefree(list);
495 }
496 }
fcf2db38
NIS		 497}
498
499void
3a1ee7e8 500PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 501{
14a5cf38
JH		 502 PerlIO_pair_t *p;
503 if (list->cur >= list->len) {
504 list->len += 8;
505 if (list->array)
506 Renew(list->array, list->len, PerlIO_pair_t);
507 else
508 New('l', list->array, list->len, PerlIO_pair_t);
509 }
510 p = &(list->array[list->cur++]);
511 p->funcs = funcs;
512 if ((p->arg = arg)) {
513 SvREFCNT_inc(arg);
514 }
fcf2db38
NIS		 515}
516
3a1ee7e8
NIS		 517PerlIO_list_t *
518PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
519{
520 int i;
521 PerlIO_list_t *list = PerlIO_list_alloc(aTHX);
522 for (i=0; i < proto->cur; i++) {
523 SV *arg = Nullsv;
524 if (proto->array[i].arg)
3aaf42a7 525 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
3a1ee7e8
NIS		 526 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
527 }
528 return list;
529}
4a4a6116 530
05d1247b 531void
3a1ee7e8 532PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 533{
3aaf42a7 534#ifdef USE_ITHREADS
3a1ee7e8
NIS		 535 PerlIO **table = &proto->Iperlio;
536 PerlIO *f;
537 PL_perlio = NULL;
538 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
539 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
540 PerlIO_allocate(aTHX); /* root slot is never used */
541 while ((f = *table)) {
542 int i;
543 table = (PerlIO **) (f++);
544 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
545 if (*f) {
93a8090d 546 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS		 547 }
548 f++;
549 }
550 }
3aaf42a7 551#endif
9a6404c5
DM		 552}
553
554void
3a1ee7e8 555PerlIO_cleanup(pTHX)
05d1247b 556{
a1ea730d 557 PerlIO_cleantable(aTHX_ &PL_perlio);
6f9d8c32
NIS		 558}
559
9e353e3b 560void
13621cfb
NIS		 561PerlIO_destruct(pTHX)
562{
a1ea730d 563 PerlIO **table = &PL_perlio;
14a5cf38
JH		 564 PerlIO *f;
565 while ((f = *table)) {
566 int i;
567 table = (PerlIO **) (f++);
568 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
569 PerlIO *x = f;
570 PerlIOl *l;
571 while ((l = *x)) {
572 if (l->tab->kind & PERLIO_K_DESTRUCT) {
573 PerlIO_debug("Destruct popping %s\n", l->tab->name);
574 PerlIO_flush(x);
575 PerlIO_pop(aTHX_ x);
576 }
577 else {
578 x = PerlIONext(x);
579 }
580 }
581 f++;
582 }
583 }
3a1ee7e8
NIS		 584 PerlIO_list_free(aTHX_ PL_known_layers);
585 PL_known_layers = NULL;
586 PerlIO_list_free(aTHX_ PL_def_layerlist);
587 PL_def_layerlist = NULL;
13621cfb
NIS		 588}
589
590void
a999f61b 591PerlIO_pop(pTHX_ PerlIO *f)
760ac839 592{
14a5cf38
JH		 593 PerlIOl *l = *f;
594 if (l) {
595 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
596 if (l->tab->Popped) {
597 /*
598 * If popped returns non-zero do not free its layer structure
599 * it has either done so itself, or it is shared and still in
71200d45 600 * use
14a5cf38
JH		 601 */
602 if ((*l->tab->Popped) (f) != 0)
603 return;
604 }
605 *f = l->next;;
3a1ee7e8 606 Safefree(l);
a8c08ecd 607 }
6f9d8c32
NIS		 608}
609
9e353e3b 610/*--------------------------------------------------------------------------------------*/
14a5cf38 611/*
71200d45 612 * XS Interface for perl code
14a5cf38 613 */
9e353e3b 614
fcf2db38 615PerlIO_funcs *
2edd7e44 616PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 617{
14a5cf38
JH		 618 IV i;
619 if ((SSize_t) len <= 0)
620 len = strlen(name);
3a1ee7e8
NIS		 621 for (i = 0; i < PL_known_layers->cur; i++) {
622 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38
JH		 623 if (memEQ(f->name, name, len)) {
624 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
625 return f;
626 }
627 }
3a1ee7e8
NIS		 628 if (load && PL_subname && PL_def_layerlist
629 && PL_def_layerlist->cur >= 2) {
14a5cf38
JH		 630 SV *pkgsv = newSVpvn("PerlIO", 6);
631 SV *layer = newSVpvn(name, len);
632 ENTER;
633 /*
71200d45 634 * The two SVs are magically freed by load_module
14a5cf38
JH		 635 */
636 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
637 LEAVE;
638 return PerlIO_find_layer(aTHX_ name, len, 0);
639 }
640 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
641 return NULL;
f3862f8b
NIS		 642}
643
2a1bc955 644#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 645
646static int
647perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
648{
14a5cf38
JH		 649 if (SvROK(sv)) {
650 IO *io = GvIOn((GV *) SvRV(sv));
651 PerlIO *ifp = IoIFP(io);
652 PerlIO *ofp = IoOFP(io);
653 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
654 }
655 return 0;
b13b2135
NIS		 656}
657
658static int
659perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
660{
14a5cf38
JH		 661 if (SvROK(sv)) {
662 IO *io = GvIOn((GV *) SvRV(sv));
663 PerlIO *ifp = IoIFP(io);
664 PerlIO *ofp = IoOFP(io);
665 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
666 }
667 return 0;
b13b2135
NIS		 668}
669
670static int
671perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
672{
14a5cf38
JH		 673 Perl_warn(aTHX_ "clear %" SVf, sv);
674 return 0;
b13b2135
NIS		 675}
676
677static int
678perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
679{
14a5cf38
JH		 680 Perl_warn(aTHX_ "free %" SVf, sv);
681 return 0;
b13b2135
NIS		 682}
683
684MGVTBL perlio_vtab = {
14a5cf38
JH		 685 perlio_mg_get,
686 perlio_mg_set,
687 NULL, /* len */
688 perlio_mg_clear,
689 perlio_mg_free
b13b2135
NIS		 690};
691
692XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
693{
14a5cf38
JH		 694 dXSARGS;
695 SV *sv = SvRV(ST(1));
696 AV *av = newAV();
697 MAGIC *mg;
698 int count = 0;
699 int i;
700 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
701 SvRMAGICAL_off(sv);
702 mg = mg_find(sv, PERL_MAGIC_ext);
703 mg->mg_virtual = &perlio_vtab;
704 mg_magical(sv);
705 Perl_warn(aTHX_ "attrib %" SVf, sv);
706 for (i = 2; i < items; i++) {
707 STRLEN len;
708 const char *name = SvPV(ST(i), len);
709 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
710 if (layer) {
711 av_push(av, SvREFCNT_inc(layer));
712 }
713 else {
714 ST(count) = ST(i);
715 count++;
716 }
717 }
718 SvREFCNT_dec(av);
719 XSRETURN(count);
720}
721
722#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 723
e3f3bf95
NIS		 724SV *
725PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 726{
14a5cf38
JH		 727 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
728 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
729 return sv;
e3f3bf95
NIS		 730}
731
0c4f7ff0
NIS		 732XS(XS_PerlIO__Layer__find)
733{
14a5cf38
JH		 734 dXSARGS;
735 if (items < 2)
736 Perl_croak(aTHX_ "Usage class->find(name[,load])");
737 else {
738 STRLEN len = 0;
739 char *name = SvPV(ST(1), len);
740 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
741 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
742 ST(0) =
743 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
744 &PL_sv_undef;
745 XSRETURN(1);
746 }
0c4f7ff0
NIS		 747}
748
e3f3bf95
NIS		 749void
750PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
751{
3a1ee7e8
NIS		 752 if (!PL_known_layers)
753 PL_known_layers = PerlIO_list_alloc(aTHX);
754 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
14a5cf38 755 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 756}
757
1141d9f8 758int
fcf2db38 759PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 760{
14a5cf38
JH		 761 if (names) {
762 const char *s = names;
763 while (*s) {
764 while (isSPACE(*s) || *s == ':')
765 s++;
766 if (*s) {
767 STRLEN llen = 0;
768 const char *e = s;
769 const char *as = Nullch;
770 STRLEN alen = 0;
771 if (!isIDFIRST(*s)) {
772 /*
773 * Message is consistent with how attribute lists are
774 * passed. Even though this means "foo : : bar" is
71200d45 775 * seen as an invalid separator character.
14a5cf38
JH		 776 */
777 char q = ((*s == '\'') ? '"' : '\'');
778 Perl_warn(aTHX_
779 "perlio: invalid separator character %c%c%c in layer specification list",
780 q, *s, q);
781 return -1;
782 }
783 do {
784 e++;
785 } while (isALNUM(*e));
786 llen = e - s;
787 if (*e == '(') {
788 int nesting = 1;
789 as = ++e;
790 while (nesting) {
791 switch (*e++) {
792 case ')':
793 if (--nesting == 0)
794 alen = (e - 1) - as;
795 break;
796 case '(':
797 ++nesting;
798 break;
799 case '\\':
800 /*
801 * It's a nul terminated string, not allowed
802 * to \ the terminating null. Anything other
71200d45 803 * character is passed over.
14a5cf38
JH		 804 */
805 if (*e++) {
806 break;
807 }
808 /*
71200d45 809 * Drop through
14a5cf38
JH		 810 */
811 case '\0':
812 e--;
813 Perl_warn(aTHX_
814 "perlio: argument list not closed for layer \"%.*s\"",
815 (int) (e - s), s);
816 return -1;
817 default:
818 /*
71200d45 819 * boring.
14a5cf38
JH		 820 */
821 break;
822 }
823 }
824 }
825 if (e > s) {
826 PerlIO_funcs *layer =
827 PerlIO_find_layer(aTHX_ s, llen, 1);
828 if (layer) {
3a1ee7e8 829 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 830 (as) ? newSVpvn(as,
831 alen) :
832 &PL_sv_undef);
833 }
834 else {
835 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
836 (int) llen, s);
837 return -1;
838 }
839 }
840 s = e;
841 }
842 }
843 }
844 return 0;
1141d9f8
NIS		 845}
846
dfebf958 847void
fcf2db38 848PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 849{
14a5cf38
JH		 850 PerlIO_funcs *tab = &PerlIO_perlio;
851 if (O_BINARY != O_TEXT) {
852 tab = &PerlIO_crlf;
853 }
854 else {
855 if (PerlIO_stdio.Set_ptrcnt) {
856 tab = &PerlIO_stdio;
857 }
dfebf958 858 }
14a5cf38 859 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 860 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 861 &PL_sv_undef);
dfebf958
NIS		 862}
863
e3f3bf95 864SV *
14a5cf38 865PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 866{
14a5cf38 867 return av->array[n].arg;
e3f3bf95
NIS		 868}
869
f3862f8b 870PerlIO_funcs *
14a5cf38 871PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 872{
14a5cf38
JH		 873 if (n >= 0 && n < av->cur) {
874 PerlIO_debug("Layer %" IVdf " is %s\n", n,
875 av->array[n].funcs->name);
876 return av->array[n].funcs;
877 }
878 if (!def)
879 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
880 return def;
e3f3bf95
NIS		 881}
882
fcf2db38 883PerlIO_list_t *
e3f3bf95
NIS		 884PerlIO_default_layers(pTHX)
885{
3a1ee7e8 886 if (!PL_def_layerlist) {
14a5cf38
JH		 887 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
888 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 889 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 890 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 891#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 892 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 893#if 0
14a5cf38 894 osLayer = &PerlIO_win32;
0c4128ad 895#endif
2f8118af 896#endif
14a5cf38
JH		 897 PerlIO_define_layer(aTHX_ & PerlIO_raw);
898 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
899 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
900 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 901#ifdef HAS_MMAP
14a5cf38 902 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 903#endif
14a5cf38
JH		 904 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
905 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 906 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 907 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
908 &PL_sv_undef);
909 if (s) {
3a1ee7e8 910 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 911 }
912 else {
3a1ee7e8 913 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 914 }
1141d9f8 915 }
3a1ee7e8
NIS		 916 if (PL_def_layerlist->cur < 2) {
917 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 918 }
3a1ee7e8 919 return PL_def_layerlist;
e3f3bf95
NIS		 920}
921
0c4f7ff0
NIS		 922void
923Perl_boot_core_PerlIO(pTHX)
924{
925#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 926 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
927 __FILE__);
0c4f7ff0 928#endif
14a5cf38 929 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 930}
e3f3bf95
NIS		 931
932PerlIO_funcs *
933PerlIO_default_layer(pTHX_ I32 n)
934{
14a5cf38
JH		 935 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
936 if (n < 0)
937 n += av->cur;
938 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 939}
940
a999f61b
NIS		 941#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
942#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 943
944void
1141d9f8 945PerlIO_stdstreams(pTHX)
60382766 946{
a1ea730d 947 if (!PL_perlio) {
14a5cf38
JH		 948 PerlIO_allocate(aTHX);
949 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
950 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
951 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
952 }
60382766
NIS		 953}
954
955PerlIO *
14a5cf38
JH		 956PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
957{
958 PerlIOl *l = NULL;
3a1ee7e8 959 Newc('L',l,tab->size,char,PerlIOl);
14a5cf38
JH		 960 if (l) {
961 Zero(l, tab->size, char);
962 l->next = *f;
963 l->tab = tab;
964 *f = l;
965 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
966 (mode) ? mode : "(Null)", arg);
967 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
968 PerlIO_pop(aTHX_ f);
969 return NULL;
970 }
971 }
972 return f;
60382766
NIS		 973}
974
dfebf958 975IV
e3f3bf95 976PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 977{
14a5cf38
JH		 978 dTHX;
979 PerlIO_pop(aTHX_ f);
980 if (*f) {
981 PerlIO_flush(f);
982 PerlIO_pop(aTHX_ f);
983 return 0;
984 }
985 return -1;
4b803d04
NIS		 986}
987
988IV
e3f3bf95 989PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 990{
14a5cf38 991 /*
71200d45 992 * Remove the dummy layer
14a5cf38
JH		 993 */
994 dTHX;
995 PerlIO_pop(aTHX_ f);
996 /*
71200d45 997 * Pop back to bottom layer
14a5cf38
JH		 998 */
999 if (f && *f) {
1000 PerlIO_flush(f);
1001 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1002 if (*PerlIONext(f)) {
1003 PerlIO_pop(aTHX_ f);
1004 }
1005 else {
1006 /*
71200d45 1007 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 1008 */
1009 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1010 PerlIO_pop(aTHX_ PerlIONext(f));
1011 }
1012 break;
1013 }
1014 }
1015 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1016 return 0;
1017 }
1018 return -1;
dfebf958
NIS		 1019}
1020
ac27b0f5 1021int
14a5cf38
JH		 1022PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1023 PerlIO_list_t *layers, IV n)
1024{
1025 IV max = layers->cur;
1026 int code = 0;
1027 while (n < max) {
1028 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1029 if (tab) {
1030 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1031 code = -1;
1032 break;
1033 }
1034 }
1035 n++;
1036 }
1037 return code;
e3f3bf95
NIS		 1038}
1039
1040int
ac27b0f5
NIS		 1041PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1042{
14a5cf38
JH		 1043 int code = 0;
1044 if (names) {
3a1ee7e8 1045 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1046 code = PerlIO_parse_layers(aTHX_ layers, names);
1047 if (code == 0) {
1048 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1049 }
3a1ee7e8 1050 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1051 }
14a5cf38 1052 return code;
ac27b0f5
NIS		 1053}
1054
f3862f8b 1055
60382766 1056/*--------------------------------------------------------------------------------------*/
14a5cf38 1057/*
71200d45 1058 * Given the abstraction above the public API functions
14a5cf38 1059 */
60382766
NIS		 1060
1061int
f5b9d040 1062PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1063{
14a5cf38
JH		 1064 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1065 f, PerlIOBase(f)->tab->name, iotype, mode,
1066 (names) ? names : "(Null)");
89aec743 1067 PerlIO_flush(f);
14a5cf38
JH		 1068 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1069 PerlIO *top = f;
1070 while (*top) {
1071 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 1072 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1073 break;
1074 }
1075 top = PerlIONext(top);
89aec743 1076 PerlIO_flush(top);
14a5cf38
JH		 1077 }
1078 }
1079 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 1080}
1081
1082#undef PerlIO__close
1083int
1084PerlIO__close(PerlIO *f)
1085{
14a5cf38
JH		 1086 if (f && *f)
1087 return (*PerlIOBase(f)->tab->Close) (f);
1088 else {
1089 SETERRNO(EBADF, SS$_IVCHAN);
1090 return -1;
1091 }
76ced9ad
NIS		 1092}
1093
b931b1d9
NIS		 1094#undef PerlIO_close
1095int
1096PerlIO_close(PerlIO *f)
1097{
14a5cf38
JH		 1098 dTHX;
1099 int code = -1;
1100 if (f && *f) {
1101 code = (*PerlIOBase(f)->tab->Close) (f);
1102 while (*f) {
1103 PerlIO_pop(aTHX_ f);
1104 }
f6c77cf1 1105 }
14a5cf38 1106 return code;
b931b1d9
NIS		 1107}
1108
1109#undef PerlIO_fileno
1110int
1111PerlIO_fileno(PerlIO *f)
1112{
14a5cf38
JH		 1113 if (f && *f)
1114 return (*PerlIOBase(f)->tab->Fileno) (f);
1115 else {
1116 SETERRNO(EBADF, SS$_IVCHAN);
1117 return -1;
1118 }
b931b1d9
NIS		 1119}
1120
1141d9f8
NIS		 1121static const char *
1122PerlIO_context_layers(pTHX_ const char *mode)
1123{
14a5cf38
JH		 1124 const char *type = NULL;
1125 /*
71200d45 1126 * Need to supply default layer info from open.pm
14a5cf38
JH		 1127 */
1128 if (PL_curcop) {
1129 SV *layers = PL_curcop->cop_io;
1130 if (layers) {
1131 STRLEN len;
1132 type = SvPV(layers, len);
1133 if (type && mode[0] != 'r') {
1134 /*
71200d45 1135 * Skip to write part
14a5cf38
JH		 1136 */
1137 const char *s = strchr(type, 0);
1138 if (s && (s - type) < len) {
1139 type = s + 1;
1140 }
1141 }
1142 }
1143 }
1144 return type;
1141d9f8
NIS		 1145}
1146
fcf2db38 1147static PerlIO_funcs *
2edd7e44
NIS		 1148PerlIO_layer_from_ref(pTHX_ SV *sv)
1149{
14a5cf38 1150 /*
71200d45 1151 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1152 */
1153 if (SvTYPE(sv) < SVt_PVAV)
1154 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1155
1156 /*
71200d45 1157 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1158 */
1159 switch (SvTYPE(sv)) {
1160 case SVt_PVAV:
1161 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1162 case SVt_PVHV:
1163 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1164 case SVt_PVCV:
1165 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1166 case SVt_PVGV:
1167 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1168 }
1169 return NULL;
2edd7e44
NIS		 1170}
1171
fcf2db38 1172PerlIO_list_t *
14a5cf38
JH		 1173PerlIO_resolve_layers(pTHX_ const char *layers,
1174 const char *mode, int narg, SV **args)
1175{
1176 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1177 int incdef = 1;
a1ea730d 1178 if (!PL_perlio)
14a5cf38
JH		 1179 PerlIO_stdstreams(aTHX);
1180 if (narg) {
1181 SV *arg = *args;
1182 /*
71200d45
NIS		 1183 * If it is a reference but not an object see if we have a handler
1184 * for it
14a5cf38
JH		 1185 */
1186 if (SvROK(arg) && !sv_isobject(arg)) {
1187 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1188 if (handler) {
3a1ee7e8
NIS		 1189 def = PerlIO_list_alloc(aTHX);
1190 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1191 incdef = 0;
1192 }
1193 /*
71200d45 1194 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1195 * something sensible else we will just stringfy and open
71200d45 1196 * resulting string.
14a5cf38
JH		 1197 */
1198 }
1199 }
1200 if (!layers)
1201 layers = PerlIO_context_layers(aTHX_ mode);
1202 if (layers && *layers) {
1203 PerlIO_list_t *av;
1204 if (incdef) {
1205 IV i = def->cur;
3a1ee7e8 1206 av = PerlIO_list_alloc(aTHX);
14a5cf38 1207 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1208 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1209 def->array[i].arg);
1210 }
1211 }
1212 else {
1213 av = def;
1214 }
1215 PerlIO_parse_layers(aTHX_ av, layers);
1216 return av;
1217 }
1218 else {
1219 if (incdef)
1220 def->refcnt++;
1221 return def;
1222 }
ee518936
NIS		 1223}
1224
1225PerlIO *
14a5cf38
JH		 1226PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1227 int imode, int perm, PerlIO *f, int narg, SV **args)
1228{
1229 if (!f && narg == 1 && *args == &PL_sv_undef) {
1230 if ((f = PerlIO_tmpfile())) {
1231 if (!layers)
1232 layers = PerlIO_context_layers(aTHX_ mode);
1233 if (layers && *layers)
1234 PerlIO_apply_layers(aTHX_ f, mode, layers);
1235 }
1236 }
1237 else {
1238 PerlIO_list_t *layera = NULL;
1239 IV n;
1240 PerlIO_funcs *tab = NULL;
1241 if (f && *f) {
1242 /*
71200d45
NIS		 1243 * This is "reopen" - it is not tested as perl does not use it
1244 * yet
14a5cf38
JH		 1245 */
1246 PerlIOl *l = *f;
3a1ee7e8 1247 layera = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1248 while (l) {
1249 SV *arg =
1250 (l->tab->Getarg) ? (*l->tab->
1251 Getarg) (&l) : &PL_sv_undef;
3a1ee7e8 1252 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1253 l = *PerlIONext(&l);
1254 }
1255 }
1256 else {
1257 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1258 }
1259 /*
71200d45 1260 * Start at "top" of layer stack
14a5cf38
JH		 1261 */
1262 n = layera->cur - 1;
1263 while (n >= 0) {
1264 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1265 if (t && t->Open) {
1266 tab = t;
1267 break;
1268 }
1269 n--;
1270 }
1271 if (tab) {
1272 /*
71200d45 1273 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1274 */
1275 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1276 tab->name, layers, mode, fd, imode, perm, f, narg,
1277 args);
1278 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1279 f, narg, args);
1280 if (f) {
1281 if (n + 1 < layera->cur) {
1282 /*
1283 * More layers above the one that we used to open -
71200d45 1284 * apply them now
14a5cf38
JH		 1285 */
1286 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1287 != 0) {
1288 f = NULL;
1289 }
1290 }
1291 }
1292 }
3a1ee7e8 1293 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1294 }
1295 return f;
ee518936 1296}
b931b1d9
NIS		 1297
1298
9e353e3b
NIS		 1299#undef PerlIO_fdopen
1300PerlIO *
1301PerlIO_fdopen(int fd, const char *mode)
1302{
14a5cf38
JH		 1303 dTHX;
1304 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1305}
1306
6f9d8c32
NIS		 1307#undef PerlIO_open
1308PerlIO *
1309PerlIO_open(const char *path, const char *mode)
1310{
14a5cf38
JH		 1311 dTHX;
1312 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1313 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1314}
1315
9e353e3b
NIS		 1316#undef PerlIO_reopen
1317PerlIO *
1318PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1319{
14a5cf38
JH		 1320 dTHX;
1321 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1322 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1323}
1324
9e353e3b
NIS		 1325#undef PerlIO_read
1326SSize_t
1327PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1328{
14a5cf38
JH		 1329 if (f && *f)
1330 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1331 else {
1332 SETERRNO(EBADF, SS$_IVCHAN);
1333 return -1;
1334 }
760ac839
LW		 1335}
1336
313ca112
NIS		 1337#undef PerlIO_unread
1338SSize_t
1339PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1340{
14a5cf38
JH		 1341 if (f && *f)
1342 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1343 else {
1344 SETERRNO(EBADF, SS$_IVCHAN);
1345 return -1;
1346 }
760ac839
LW		 1347}
1348
9e353e3b
NIS		 1349#undef PerlIO_write
1350SSize_t
1351PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1352{
14a5cf38
JH		 1353 if (f && *f)
1354 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1355 else {
1356 SETERRNO(EBADF, SS$_IVCHAN);
1357 return -1;
1358 }
760ac839
LW		 1359}
1360
9e353e3b 1361#undef PerlIO_seek
6f9d8c32 1362int
9e353e3b 1363PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1364{
14a5cf38
JH		 1365 if (f && *f)
1366 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1367 else {
1368 SETERRNO(EBADF, SS$_IVCHAN);
1369 return -1;
1370 }
760ac839
LW		 1371}
1372
9e353e3b
NIS		 1373#undef PerlIO_tell
1374Off_t
1375PerlIO_tell(PerlIO *f)
760ac839 1376{
14a5cf38
JH		 1377 if (f && *f)
1378 return (*PerlIOBase(f)->tab->Tell) (f);
1379 else {
1380 SETERRNO(EBADF, SS$_IVCHAN);
1381 return -1;
1382 }
760ac839
LW		 1383}
1384
9e353e3b 1385#undef PerlIO_flush
6f9d8c32 1386int
9e353e3b 1387PerlIO_flush(PerlIO *f)
760ac839 1388{
14a5cf38
JH		 1389 if (f) {
1390 if (*f) {
1391 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1392 if (tab && tab->Flush) {
1393 return (*tab->Flush) (f);
1394 }
1395 else {
1396 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1397 SETERRNO(EBADF, SS$_IVCHAN);
1398 return -1;
1399 }
1400 }
1401 else {
1402 PerlIO_debug("Cannot flush f=%p\n", f);
1403 SETERRNO(EBADF, SS$_IVCHAN);
1404 return -1;
1405 }
1406 }
1407 else {
1408 /*
1409 * Is it good API design to do flush-all on NULL, a potentially
1410 * errorneous input? Maybe some magical value (PerlIO*
1411 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1412 * things on fflush(NULL), but should we be bound by their design
71200d45 1413 * decisions? --jhi
14a5cf38 1414 */
a1ea730d
NIS		 1415 dTHX;
1416 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1417 int code = 0;
1418 while ((f = *table)) {
1419 int i;
1420 table = (PerlIO **) (f++);
1421 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1422 if (*f && PerlIO_flush(f) != 0)
1423 code = -1;
1424 f++;
1425 }
1426 }
1427 return code;
1428 }
760ac839
LW		 1429}
1430
a9c883f6
NIS		 1431void
1432PerlIOBase_flush_linebuf()
1433{
a1ea730d
NIS		 1434 dTHX;
1435 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1436 PerlIO *f;
1437 while ((f = *table)) {
1438 int i;
1439 table = (PerlIO **) (f++);
1440 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1441 if (*f
1442 && (PerlIOBase(f)->
1443 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1444 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1445 PerlIO_flush(f);
1446 f++;
1447 }
a9c883f6 1448 }
a9c883f6
NIS		 1449}
1450
06da4f11
NIS		 1451#undef PerlIO_fill
1452int
1453PerlIO_fill(PerlIO *f)
1454{
14a5cf38
JH		 1455 if (f && *f)
1456 return (*PerlIOBase(f)->tab->Fill) (f);
1457 else {
1458 SETERRNO(EBADF, SS$_IVCHAN);
1459 return -1;
1460 }
06da4f11
NIS		 1461}
1462
f3862f8b
NIS		 1463#undef PerlIO_isutf8
1464int
1465PerlIO_isutf8(PerlIO *f)
1466{
14a5cf38
JH		 1467 if (f && *f)
1468 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1469 else {
1470 SETERRNO(EBADF, SS$_IVCHAN);
1471 return -1;
1472 }
f3862f8b
NIS		 1473}
1474
9e353e3b 1475#undef PerlIO_eof
6f9d8c32 1476int
9e353e3b 1477PerlIO_eof(PerlIO *f)
760ac839 1478{
14a5cf38
JH		 1479 if (f && *f)
1480 return (*PerlIOBase(f)->tab->Eof) (f);
1481 else {
1482 SETERRNO(EBADF, SS$_IVCHAN);
1483 return -1;
1484 }
9e353e3b
NIS		 1485}
1486
1487#undef PerlIO_error
1488int
1489PerlIO_error(PerlIO *f)
1490{
14a5cf38
JH		 1491 if (f && *f)
1492 return (*PerlIOBase(f)->tab->Error) (f);
1493 else {
1494 SETERRNO(EBADF, SS$_IVCHAN);
1495 return -1;
1496 }
9e353e3b
NIS		 1497}
1498
1499#undef PerlIO_clearerr
1500void
1501PerlIO_clearerr(PerlIO *f)
1502{
14a5cf38
JH		 1503 if (f && *f)
1504 (*PerlIOBase(f)->tab->Clearerr) (f);
1505 else
1506 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1507}
1508
1509#undef PerlIO_setlinebuf
1510void
1511PerlIO_setlinebuf(PerlIO *f)
1512{
14a5cf38
JH		 1513 if (f && *f)
1514 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1515 else
1516 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1517}
1518
1519#undef PerlIO_has_base
1520int
1521PerlIO_has_base(PerlIO *f)
1522{
14a5cf38
JH		 1523 if (f && *f) {
1524 return (PerlIOBase(f)->tab->Get_base != NULL);
1525 }
1526 return 0;
760ac839
LW		 1527}
1528
9e353e3b
NIS		 1529#undef PerlIO_fast_gets
1530int
1531PerlIO_fast_gets(PerlIO *f)
760ac839 1532{
14a5cf38
JH		 1533 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1534 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1535 return (tab->Set_ptrcnt != NULL);
1536 }
1537 return 0;
9e353e3b
NIS		 1538}
1539
1540#undef PerlIO_has_cntptr
1541int
1542PerlIO_has_cntptr(PerlIO *f)
1543{
14a5cf38
JH		 1544 if (f && *f) {
1545 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1546 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1547 }
1548 return 0;
9e353e3b
NIS		 1549}
1550
1551#undef PerlIO_canset_cnt
1552int
1553PerlIO_canset_cnt(PerlIO *f)
1554{
14a5cf38
JH		 1555 if (f && *f) {
1556 PerlIOl *l = PerlIOBase(f);
1557 return (l->tab->Set_ptrcnt != NULL);
1558 }
1559 return 0;
760ac839
LW		 1560}
1561
1562#undef PerlIO_get_base
888911fc 1563STDCHAR *
a20bf0c3 1564PerlIO_get_base(PerlIO *f)
760ac839 1565{
14a5cf38
JH		 1566 if (f && *f)
1567 return (*PerlIOBase(f)->tab->Get_base) (f);
1568 return NULL;
9e353e3b
NIS		 1569}
1570
1571#undef PerlIO_get_bufsiz
1572int
1573PerlIO_get_bufsiz(PerlIO *f)
1574{
14a5cf38
JH		 1575 if (f && *f)
1576 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1577 return 0;
9e353e3b
NIS		 1578}
1579
1580#undef PerlIO_get_ptr
1581STDCHAR *
1582PerlIO_get_ptr(PerlIO *f)
1583{
14a5cf38
JH		 1584 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1585 if (tab->Get_ptr == NULL)
1586 return NULL;
1587 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1588}
1589
1590#undef PerlIO_get_cnt
05d1247b 1591int
9e353e3b
NIS		 1592PerlIO_get_cnt(PerlIO *f)
1593{
14a5cf38
JH		 1594 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1595 if (tab->Get_cnt == NULL)
1596 return 0;
1597 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1598}
1599
1600#undef PerlIO_set_cnt
1601void
14a5cf38 1602PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1603{
14a5cf38 1604 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1605}
1606
1607#undef PerlIO_set_ptrcnt
1608void
14a5cf38 1609PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1610{
14a5cf38
JH		 1611 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1612 if (tab->Set_ptrcnt == NULL) {
1613 dTHX;
1614 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1615 }
1616 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1617}
1618
1619/*--------------------------------------------------------------------------------------*/
14a5cf38 1620/*
71200d45 1621 * utf8 and raw dummy layers
14a5cf38 1622 */
dfebf958 1623
26fb694e 1624IV
e3f3bf95 1625PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1626{
14a5cf38
JH		 1627 if (PerlIONext(f)) {
1628 dTHX;
1629 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1630 PerlIO_pop(aTHX_ f);
1631 if (tab->kind & PERLIO_K_UTF8)
1632 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1633 else
1634 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1635 return 0;
1636 }
1637 return -1;
26fb694e
NIS		 1638}
1639
dfebf958 1640PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1641 "utf8",
1642 sizeof(PerlIOl),
1643 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1644 PerlIOUtf8_pushed,
1645 NULL,
1646 NULL,
1647 NULL,
1648 NULL,
1649 NULL,
1650 NULL,
1651 NULL,
1652 NULL,
1653 NULL,
1654 NULL,
1655 NULL, /* flush */
1656 NULL, /* fill */
1657 NULL,
1658 NULL,
1659 NULL,
1660 NULL,
1661 NULL, /* get_base */
1662 NULL, /* get_bufsiz */
1663 NULL, /* get_ptr */
1664 NULL, /* get_cnt */
1665 NULL, /* set_ptrcnt */
26fb694e
NIS		 1666};
1667
1668PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1669 "bytes",
1670 sizeof(PerlIOl),
1671 PERLIO_K_DUMMY,
1672 PerlIOUtf8_pushed,
1673 NULL,
1674 NULL,
1675 NULL,
1676 NULL,
1677 NULL,
1678 NULL,
1679 NULL,
1680 NULL,
1681 NULL,
1682 NULL,
1683 NULL, /* flush */
1684 NULL, /* fill */
1685 NULL,
1686 NULL,
1687 NULL,
1688 NULL,
1689 NULL, /* get_base */
1690 NULL, /* get_bufsiz */
1691 NULL, /* get_ptr */
1692 NULL, /* get_cnt */
1693 NULL, /* set_ptrcnt */
dfebf958
NIS		 1694};
1695
1696PerlIO *
14a5cf38
JH		 1697PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1698 IV n, const char *mode, int fd, int imode, int perm,
1699 PerlIO *old, int narg, SV **args)
dfebf958 1700{
14a5cf38
JH		 1701 PerlIO_funcs *tab = PerlIO_default_btm();
1702 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1703 old, narg, args);
dfebf958
NIS		 1704}
1705
1706PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1707 "raw",
1708 sizeof(PerlIOl),
1709 PERLIO_K_DUMMY,
1710 PerlIORaw_pushed,
1711 PerlIOBase_popped,
1712 PerlIORaw_open,
1713 NULL,
1714 NULL,
1715 NULL,
1716 NULL,
1717 NULL,
1718 NULL,
1719 NULL,
1720 NULL,
1721 NULL, /* flush */
1722 NULL, /* fill */
1723 NULL,
1724 NULL,
1725 NULL,
1726 NULL,
1727 NULL, /* get_base */
1728 NULL, /* get_bufsiz */
1729 NULL, /* get_ptr */
1730 NULL, /* get_cnt */
1731 NULL, /* set_ptrcnt */
dfebf958
NIS		 1732};
1733/*--------------------------------------------------------------------------------------*/
1734/*--------------------------------------------------------------------------------------*/
14a5cf38 1735/*
71200d45 1736 * "Methods" of the "base class"
14a5cf38 1737 */
9e353e3b
NIS		 1738
1739IV
1740PerlIOBase_fileno(PerlIO *f)
1741{
14a5cf38 1742 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1743}
1744
f5b9d040 1745char *
14a5cf38
JH		 1746PerlIO_modestr(PerlIO *f, char *buf)
1747{
1748 char *s = buf;
1749 IV flags = PerlIOBase(f)->flags;
1750 if (flags & PERLIO_F_APPEND) {
1751 *s++ = 'a';
1752 if (flags & PERLIO_F_CANREAD) {
1753 *s++ = '+';
1754 }
1755 }
1756 else if (flags & PERLIO_F_CANREAD) {
1757 *s++ = 'r';
1758 if (flags & PERLIO_F_CANWRITE)
1759 *s++ = '+';
1760 }
1761 else if (flags & PERLIO_F_CANWRITE) {
1762 *s++ = 'w';
1763 if (flags & PERLIO_F_CANREAD) {
1764 *s++ = '+';
1765 }
1766 }
5f1a76d0 1767#if O_TEXT != O_BINARY
14a5cf38
JH		 1768 if (!(flags & PERLIO_F_CRLF))
1769 *s++ = 'b';
5f1a76d0 1770#endif
14a5cf38
JH		 1771 *s = '\0';
1772 return buf;
f5b9d040
NIS		 1773}
1774
76ced9ad 1775IV
e3f3bf95 1776PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1777{
14a5cf38 1778 PerlIOl *l = PerlIOBase(f);
b7953727 1779#if 0
14a5cf38
JH		 1780 const char *omode = mode;
1781 char temp[8];
b7953727 1782#endif
14a5cf38
JH		 1783 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1784 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1785 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1786 if (tab->Set_ptrcnt != NULL)
1787 l->flags |= PERLIO_F_FASTGETS;
1788 if (mode) {
1789 if (*mode == '#' || *mode == 'I')
1790 mode++;
1791 switch (*mode++) {
1792 case 'r':
1793 l->flags |= PERLIO_F_CANREAD;
1794 break;
1795 case 'a':
1796 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1797 break;
1798 case 'w':
1799 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1800 break;
1801 default:
1802 SETERRNO(EINVAL, LIB$_INVARG);
1803 return -1;
1804 }
1805 while (*mode) {
1806 switch (*mode++) {
1807 case '+':
1808 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1809 break;
1810 case 'b':
1811 l->flags &= ~PERLIO_F_CRLF;
1812 break;
1813 case 't':
1814 l->flags |= PERLIO_F_CRLF;
1815 break;
1816 default:
1817 SETERRNO(EINVAL, LIB$_INVARG);
1818 return -1;
1819 }
1820 }
1821 }
1822 else {
1823 if (l->next) {
1824 l->flags |= l->next->flags &
1825 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1826 PERLIO_F_APPEND);
1827 }
1828 }
5e2ab84b 1829#if 0
14a5cf38
JH		 1830 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1831 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1832 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1833#endif
14a5cf38 1834 return 0;
76ced9ad
NIS		 1835}
1836
1837IV
1838PerlIOBase_popped(PerlIO *f)
1839{
14a5cf38 1840 return 0;
760ac839
LW		 1841}
1842
9e353e3b
NIS		 1843SSize_t
1844PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1845{
14a5cf38
JH		 1846 dTHX;
1847 /*
71200d45 1848 * Save the position as current head considers it
14a5cf38
JH		 1849 */
1850 Off_t old = PerlIO_tell(f);
1851 SSize_t done;
1852 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1853 PerlIOSelf(f, PerlIOBuf)->posn = old;
1854 done = PerlIOBuf_unread(f, vbuf, count);
1855 return done;
9e353e3b
NIS		 1856}
1857
f6c77cf1
NIS		 1858SSize_t
1859PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1860{
14a5cf38
JH		 1861 STDCHAR *buf = (STDCHAR *) vbuf;
1862 if (f) {
1863 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1864 return 0;
1865 while (count > 0) {
1866 SSize_t avail = PerlIO_get_cnt(f);
1867 SSize_t take = 0;
1868 if (avail > 0)
1869 take = (count < avail) ? count : avail;
1870 if (take > 0) {
1871 STDCHAR *ptr = PerlIO_get_ptr(f);
1872 Copy(ptr, buf, take, STDCHAR);
1873 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1874 count -= take;
1875 buf += take;
1876 }
1877 if (count > 0 && avail <= 0) {
1878 if (PerlIO_fill(f) != 0)
1879 break;
1880 }
1881 }
1882 return (buf - (STDCHAR *) vbuf);
1883 }
f6c77cf1 1884 return 0;
f6c77cf1
NIS		 1885}
1886
9e353e3b 1887IV
06da4f11 1888PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1889{
14a5cf38 1890 return 0;
9e353e3b
NIS		 1891}
1892
1893IV
06da4f11
NIS		 1894PerlIOBase_noop_fail(PerlIO *f)
1895{
14a5cf38 1896 return -1;
06da4f11
NIS		 1897}
1898
1899IV
9e353e3b
NIS		 1900PerlIOBase_close(PerlIO *f)
1901{
14a5cf38
JH		 1902 IV code = 0;
1903 PerlIO *n = PerlIONext(f);
1904 if (PerlIO_flush(f) != 0)
1905 code = -1;
1906 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1907 code = -1;
1908 PerlIOBase(f)->flags &=
1909 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1910 return code;
9e353e3b
NIS		 1911}
1912
1913IV
1914PerlIOBase_eof(PerlIO *f)
1915{
14a5cf38
JH		 1916 if (f && *f) {
1917 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1918 }
1919 return 1;
9e353e3b
NIS		 1920}
1921
1922IV
1923PerlIOBase_error(PerlIO *f)
1924{
14a5cf38
JH		 1925 if (f && *f) {
1926 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1927 }
1928 return 1;
9e353e3b
NIS		 1929}
1930
1931void
1932PerlIOBase_clearerr(PerlIO *f)
1933{
14a5cf38
JH		 1934 if (f && *f) {
1935 PerlIO *n = PerlIONext(f);
1936 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1937 if (n)
1938 PerlIO_clearerr(n);
1939 }
9e353e3b
NIS		 1940}
1941
1942void
1943PerlIOBase_setlinebuf(PerlIO *f)
1944{
14a5cf38
JH		 1945 if (f) {
1946 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1947 }
9e353e3b
NIS		 1948}
1949
93a8090d
NIS		 1950SV *
1951PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1952{
1953 if (!arg)
1954 return Nullsv;
1955#ifdef sv_dup
1956 if (param) {
1957 return sv_dup(arg, param);
1958 }
1959 else {
1960 return newSVsv(arg);
1961 }
1962#else
1963 return newSVsv(arg);
1964#endif
1965}
1966
1967PerlIO *
1968PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1969{
1970 PerlIO *nexto = PerlIONext(o);
1971 if (*nexto) {
1972 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1973 f = (*tab->Dup)(aTHX_ f, nexto, param);
1974 }
1975 if (f) {
1976 PerlIO_funcs *self = PerlIOBase(o)->tab;
1977 SV *arg = Nullsv;
1978 char buf[8];
1979 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1980 if (self->Getarg) {
1981 arg = (*self->Getarg)(o);
1982 if (arg) {
1983 arg = PerlIO_sv_dup(aTHX_ arg, param);
1984 }
1985 }
1986 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1987 if (!f && arg) {
1988 SvREFCNT_dec(arg);
1989 }
1990 }
1991 return f;
1992}
1993
1994#define PERLIO_MAX_REFCOUNTABLE_FD 2048
1995#ifdef USE_ITHREADS
1996perl_mutex PerlIO_mutex;
1997int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD] = {1,1,1};
1998#endif
1999
2000void
2001PerlIO_init(pTHX)
2002{
2003 /* Place holder for stdstreams call ??? */
2004#ifdef USE_ITHREADS
2005 MUTEX_INIT(&PerlIO_mutex);
2006#endif
2007}
2008
9e353e3b 2009/*--------------------------------------------------------------------------------------*/
14a5cf38 2010/*
71200d45 2011 * Bottom-most level for UNIX-like case
14a5cf38 2012 */
9e353e3b 2013
14a5cf38
JH		 2014typedef struct {
2015 struct _PerlIO base; /* The generic part */
2016 int fd; /* UNIX like file descriptor */
2017 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2018} PerlIOUnix;
2019
6f9d8c32 2020int
9e353e3b 2021PerlIOUnix_oflags(const char *mode)
760ac839 2022{
14a5cf38
JH		 2023 int oflags = -1;
2024 if (*mode == 'I' || *mode == '#')
2025 mode++;
2026 switch (*mode) {
2027 case 'r':
2028 oflags = O_RDONLY;
2029 if (*++mode == '+') {
2030 oflags = O_RDWR;
2031 mode++;
2032 }
2033 break;
2034
2035 case 'w':
2036 oflags = O_CREAT | O_TRUNC;
2037 if (*++mode == '+') {
2038 oflags |= O_RDWR;
2039 mode++;
2040 }
2041 else
2042 oflags |= O_WRONLY;
2043 break;
2044
2045 case 'a':
2046 oflags = O_CREAT | O_APPEND;
2047 if (*++mode == '+') {
2048 oflags |= O_RDWR;
2049 mode++;
2050 }
2051 else
2052 oflags |= O_WRONLY;
2053 break;
2054 }
2055 if (*mode == 'b') {
2056 oflags |= O_BINARY;
2057 oflags &= ~O_TEXT;
2058 mode++;
2059 }
2060 else if (*mode == 't') {
2061 oflags |= O_TEXT;
2062 oflags &= ~O_BINARY;
2063 mode++;
2064 }
2065 /*
71200d45 2066 * Always open in binary mode
14a5cf38
JH		 2067 */
2068 oflags |= O_BINARY;
2069 if (*mode || oflags == -1) {
2070 SETERRNO(EINVAL, LIB$_INVARG);
2071 oflags = -1;
2072 }
2073 return oflags;
9e353e3b
NIS		 2074}
2075
2076IV
2077PerlIOUnix_fileno(PerlIO *f)
2078{
14a5cf38 2079 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2080}
2081
93a8090d
NIS		 2082void
2083PerlIOUnix_refcnt_inc(int fd)
2084{
2085#ifdef USE_ITHREADS
2086 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2087 MUTEX_LOCK(&PerlIO_mutex);
2088 PerlIO_fd_refcnt[fd]++;
2089 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2090 MUTEX_UNLOCK(&PerlIO_mutex);
2091 }
2092#endif
2093}
2094
2095
4b803d04 2096IV
e3f3bf95 2097PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2098{
14a5cf38 2099 IV code = PerlIOBase_pushed(f, mode, arg);
93a8090d 2100 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2101 if (*PerlIONext(f)) {
14a5cf38
JH		 2102 s->fd = PerlIO_fileno(PerlIONext(f));
2103 /*
71200d45 2104 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2105 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2106 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2107 */
2108 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2109 }
2110 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2111 return code;
4b803d04
NIS		 2112}
2113
9e353e3b 2114PerlIO *
14a5cf38
JH		 2115PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2116 IV n, const char *mode, int fd, int imode,
2117 int perm, PerlIO *f, int narg, SV **args)
2118{
2119 if (f) {
2120 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2121 (*PerlIOBase(f)->tab->Close) (f);
2122 }
2123 if (narg > 0) {
2124 char *path = SvPV_nolen(*args);
2125 if (*mode == '#')
2126 mode++;
2127 else {
2128 imode = PerlIOUnix_oflags(mode);
2129 perm = 0666;
2130 }
2131 if (imode != -1) {
2132 fd = PerlLIO_open3(path, imode, perm);
2133 }
2134 }
2135 if (fd >= 0) {
2136 PerlIOUnix *s;
2137 if (*mode == 'I')
2138 mode++;
2139 if (!f) {
2140 f = PerlIO_allocate(aTHX);
2141 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2142 PerlIOUnix);
2143 }
2144 else
2145 s = PerlIOSelf(f, PerlIOUnix);
2146 s->fd = fd;
2147 s->oflags = imode;
2148 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
93a8090d 2149 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH		 2150 return f;
2151 }
2152 else {
2153 if (f) {
2154 /*
71200d45 2155 * FIXME: pop layers ???
14a5cf38
JH		 2156 */
2157 }
2158 return NULL;
2159 }
9e353e3b
NIS		 2160}
2161
71200d45 2162PerlIO *
8cf8f3d1 2163PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2164{
2165 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d
NIS		 2166 int fd = os->fd;
2167 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
71200d45
NIS		 2168 f = PerlIOBase_dup(aTHX_ f, o, param);
2169 if (f) {
2170 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2171 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2172 s->fd = fd;
93a8090d 2173 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS		 2174 return f;
2175 }
71200d45
NIS		 2176 }
2177 return NULL;
2178}
2179
2180
9e353e3b
NIS		 2181SSize_t
2182PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2183{
14a5cf38
JH		 2184 dTHX;
2185 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2186 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2187 return 0;
2188 while (1) {
2189 SSize_t len = PerlLIO_read(fd, vbuf, count);
2190 if (len >= 0 || errno != EINTR) {
2191 if (len < 0)
2192 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2193 else if (len == 0 && count != 0)
2194 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2195 return len;
2196 }
2197 PERL_ASYNC_CHECK();
2198 }
9e353e3b
NIS		 2199}
2200
2201SSize_t
2202PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2203{
14a5cf38
JH		 2204 dTHX;
2205 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2206 while (1) {
2207 SSize_t len = PerlLIO_write(fd, vbuf, count);
2208 if (len >= 0 || errno != EINTR) {
2209 if (len < 0)
2210 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2211 return len;
2212 }
2213 PERL_ASYNC_CHECK();
06da4f11 2214 }
9e353e3b
NIS		 2215}
2216
2217IV
2218PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2219{
14a5cf38
JH		 2220 dSYS;
2221 Off_t new =
2222 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2223 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2224 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2225}
2226
2227Off_t
2228PerlIOUnix_tell(PerlIO *f)
2229{
14a5cf38
JH		 2230 dSYS;
2231 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2232}
2233
71200d45 2234
9e353e3b
NIS		 2235IV
2236PerlIOUnix_close(PerlIO *f)
2237{
14a5cf38
JH		 2238 dTHX;
2239 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2240 int code = 0;
93a8090d
NIS		 2241#ifdef USE_ITHREADS
2242 if ((PerlIOBase(f)->flags & PERLIO_F_OPEN) && fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2243 MUTEX_LOCK(&PerlIO_mutex);
2244 if (--PerlIO_fd_refcnt[fd] > 0) {
2245 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2246 MUTEX_UNLOCK(&PerlIO_mutex);
2247 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2248 return 0;
2249 }
2250 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2251 MUTEX_UNLOCK(&PerlIO_mutex);
2252 }
2253 else {
2254 SETERRNO(EBADF,SS$_IVCHAN);
2255 return -1;
2256 }
2257#endif
14a5cf38
JH		 2258 while (PerlLIO_close(fd) != 0) {
2259 if (errno != EINTR) {
2260 code = -1;
2261 break;
2262 }
2263 PERL_ASYNC_CHECK();
2264 }
2265 if (code == 0) {
2266 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2267 }
2268 return code;
9e353e3b
NIS		 2269}
2270
2271PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2272 "unix",
2273 sizeof(PerlIOUnix),
2274 PERLIO_K_RAW,
2275 PerlIOUnix_pushed,
2276 PerlIOBase_noop_ok,
2277 PerlIOUnix_open,
2278 NULL,
2279 PerlIOUnix_fileno,
71200d45 2280 PerlIOUnix_dup,
14a5cf38
JH		 2281 PerlIOUnix_read,
2282 PerlIOBase_unread,
2283 PerlIOUnix_write,
2284 PerlIOUnix_seek,
2285 PerlIOUnix_tell,
2286 PerlIOUnix_close,
2287 PerlIOBase_noop_ok, /* flush */
2288 PerlIOBase_noop_fail, /* fill */
2289 PerlIOBase_eof,
2290 PerlIOBase_error,
2291 PerlIOBase_clearerr,
2292 PerlIOBase_setlinebuf,
2293 NULL, /* get_base */
2294 NULL, /* get_bufsiz */
2295 NULL, /* get_ptr */
2296 NULL, /* get_cnt */
2297 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2298};
2299
2300/*--------------------------------------------------------------------------------------*/
14a5cf38 2301/*
71200d45 2302 * stdio as a layer
14a5cf38 2303 */
9e353e3b 2304
14a5cf38
JH		 2305typedef struct {
2306 struct _PerlIO base;
2307 FILE *stdio; /* The stream */
9e353e3b
NIS		 2308} PerlIOStdio;
2309
2310IV
2311PerlIOStdio_fileno(PerlIO *f)
2312{
14a5cf38
JH		 2313 dSYS;
2314 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2315}
2316
766a733e 2317char *
14a5cf38
JH		 2318PerlIOStdio_mode(const char *mode, char *tmode)
2319{
2320 char *ret = tmode;
2321 while (*mode) {
2322 *tmode++ = *mode++;
2323 }
2324 if (O_BINARY != O_TEXT) {
2325 *tmode++ = 'b';
2326 }
2327 *tmode = '\0';
2328 return ret;
2329}
2330
2331/*
71200d45 2332 * This isn't used yet ...
14a5cf38 2333 */
4b803d04 2334IV
e3f3bf95 2335PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2336{
14a5cf38
JH		 2337 if (*PerlIONext(f)) {
2338 dSYS;
2339 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2340 char tmode[8];
2341 FILE *stdio =
2342 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2343 PerlIOStdio_mode(mode, tmode));
2344 if (stdio)
2345 s->stdio = stdio;
2346 else
2347 return -1;
2348 }
2349 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2350}
2351
9e353e3b
NIS		 2352#undef PerlIO_importFILE
2353PerlIO *
2354PerlIO_importFILE(FILE *stdio, int fl)
2355{
14a5cf38
JH		 2356 dTHX;
2357 PerlIO *f = NULL;
2358 if (stdio) {
2359 PerlIOStdio *s =
2360 PerlIOSelf(PerlIO_push
2361 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2362 "r+", Nullsv), PerlIOStdio);
2363 s->stdio = stdio;
2364 }
2365 return f;
9e353e3b
NIS		 2366}
2367
2368PerlIO *
14a5cf38
JH		 2369PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2370 IV n, const char *mode, int fd, int imode,
2371 int perm, PerlIO *f, int narg, SV **args)
2372{
2373 char tmode[8];
2374 if (f) {
2375 char *path = SvPV_nolen(*args);
2376 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2377 FILE *stdio =
2378 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2379 s->stdio);
2380 if (!s->stdio)
2381 return NULL;
2382 s->stdio = stdio;
2383 return f;
2384 }
2385 else {
2386 if (narg > 0) {
2387 char *path = SvPV_nolen(*args);
2388 if (*mode == '#') {
2389 mode++;
2390 fd = PerlLIO_open3(path, imode, perm);
2391 }
2392 else {
2393 FILE *stdio = PerlSIO_fopen(path, mode);
2394 if (stdio) {
2395 PerlIOStdio *s =
2396 PerlIOSelf(PerlIO_push
2397 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2398 (mode = PerlIOStdio_mode(mode, tmode)),
2399 PerlIOArg),
2400 PerlIOStdio);
2401 s->stdio = stdio;
2402 }
2403 return f;
2404 }
2405 }
2406 if (fd >= 0) {
2407 FILE *stdio = NULL;
2408 int init = 0;
2409 if (*mode == 'I') {
2410 init = 1;
2411 mode++;
2412 }
2413 if (init) {
2414 switch (fd) {
2415 case 0:
2416 stdio = PerlSIO_stdin;
2417 break;
2418 case 1:
2419 stdio = PerlSIO_stdout;
2420 break;
2421 case 2:
2422 stdio = PerlSIO_stderr;
2423 break;
2424 }
2425 }
2426 else {
2427 stdio = PerlSIO_fdopen(fd, mode =
2428 PerlIOStdio_mode(mode, tmode));
2429 }
2430 if (stdio) {
2431 PerlIOStdio *s =
2432 PerlIOSelf(PerlIO_push
2433 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2434 mode, PerlIOArg), PerlIOStdio);
2435 s->stdio = stdio;
2436 return f;
2437 }
2438 }
2439 }
ee518936 2440 return NULL;
9e353e3b
NIS		 2441}
2442
2443SSize_t
2444PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2445{
14a5cf38
JH		 2446 dSYS;
2447 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2448 SSize_t got = 0;
2449 if (count == 1) {
2450 STDCHAR *buf = (STDCHAR *) vbuf;
2451 /*
2452 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2453 * stdio does not do that for fread()
14a5cf38
JH		 2454 */
2455 int ch = PerlSIO_fgetc(s);
2456 if (ch != EOF) {
2457 *buf = ch;
2458 got = 1;
2459 }
2460 }
2461 else
2462 got = PerlSIO_fread(vbuf, 1, count, s);
2463 return got;
9e353e3b
NIS		 2464}
2465
2466SSize_t
2467PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2468{
14a5cf38
JH		 2469 dSYS;
2470 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2471 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2472 SSize_t unread = 0;
2473 while (count > 0) {
2474 int ch = *buf-- & 0xff;
2475 if (PerlSIO_ungetc(ch, s) != ch)
2476 break;
2477 unread++;
2478 count--;
2479 }
2480 return unread;
9e353e3b
NIS		 2481}
2482
2483SSize_t
2484PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2485{
14a5cf38
JH		 2486 dSYS;
2487 return PerlSIO_fwrite(vbuf, 1, count,
2488 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2489}
2490
2491IV
2492PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2493{
14a5cf38
JH		 2494 dSYS;
2495 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2496 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2497}
2498
2499Off_t
2500PerlIOStdio_tell(PerlIO *f)
2501{
14a5cf38
JH		 2502 dSYS;
2503 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2504 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2505}
2506
2507IV
2508PerlIOStdio_close(PerlIO *f)
2509{
14a5cf38 2510 dSYS;
af130d45 2511#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2512 int optval;
2513 Sock_size_t optlen = sizeof(int);
8e4bc33b 2514#endif
14a5cf38
JH		 2515 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2516 return (
af130d45 2517#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2518 (getsockopt
2519 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2520 &optlen) <
2521 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2522#else
14a5cf38 2523 PerlSIO_fclose(stdio)
8e4bc33b 2524#endif
14a5cf38 2525 );
8e4bc33b 2526
9e353e3b
NIS		 2527}
2528
2529IV
2530PerlIOStdio_flush(PerlIO *f)
2531{
14a5cf38
JH		 2532 dSYS;
2533 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2534 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2535 return PerlSIO_fflush(stdio);
2536 }
2537 else {
88b61e10 2538#if 0
14a5cf38
JH		 2539 /*
2540 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2541 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2542 * design is to do _this_ but not have layer above flush this
71200d45 2543 * layer read-to-read
14a5cf38
JH		 2544 */
2545 /*
71200d45 2546 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2547 */
2548 int err = errno;
2549 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2550 errno = err;
88b61e10 2551#endif
14a5cf38
JH		 2552 }
2553 return 0;
9e353e3b
NIS		 2554}
2555
2556IV
06da4f11
NIS		 2557PerlIOStdio_fill(PerlIO *f)
2558{
14a5cf38
JH		 2559 dSYS;
2560 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2561 int c;
2562 /*
71200d45 2563 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2564 */
2565 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2566 if (PerlSIO_fflush(stdio) != 0)
2567 return EOF;
2568 }
2569 c = PerlSIO_fgetc(stdio);
2570 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2571 return EOF;
2572 return 0;
06da4f11
NIS		 2573}
2574
2575IV
9e353e3b
NIS		 2576PerlIOStdio_eof(PerlIO *f)
2577{
14a5cf38
JH		 2578 dSYS;
2579 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2580}
2581
2582IV
2583PerlIOStdio_error(PerlIO *f)
2584{
14a5cf38
JH		 2585 dSYS;
2586 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2587}
2588
2589void
2590PerlIOStdio_clearerr(PerlIO *f)
2591{
14a5cf38
JH		 2592 dSYS;
2593 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2594}
2595
2596void
2597PerlIOStdio_setlinebuf(PerlIO *f)
2598{
14a5cf38 2599 dSYS;
9e353e3b 2600#ifdef HAS_SETLINEBUF
14a5cf38 2601 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2602#else
14a5cf38 2603 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2604#endif
2605}
2606
2607#ifdef FILE_base
2608STDCHAR *
2609PerlIOStdio_get_base(PerlIO *f)
2610{
14a5cf38
JH		 2611 dSYS;
2612 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2613 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2614}
2615
2616Size_t
2617PerlIOStdio_get_bufsiz(PerlIO *f)
2618{
14a5cf38
JH		 2619 dSYS;
2620 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2621 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2622}
2623#endif
2624
2625#ifdef USE_STDIO_PTR
2626STDCHAR *
2627PerlIOStdio_get_ptr(PerlIO *f)
2628{
14a5cf38
JH		 2629 dSYS;
2630 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2631 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2632}
2633
2634SSize_t
2635PerlIOStdio_get_cnt(PerlIO *f)
2636{
14a5cf38
JH		 2637 dSYS;
2638 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2639 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2640}
2641
2642void
14a5cf38 2643PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2644{
14a5cf38
JH		 2645 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2646 dSYS;
2647 if (ptr != NULL) {
9e353e3b 2648#ifdef STDIO_PTR_LVALUE
14a5cf38 2649 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2650#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2651 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2652 dTHX;
2653 assert(PerlSIO_get_cnt(stdio) == (cnt));
2654 }
9e353e3b
NIS		 2655#endif
2656#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2657 /*
71200d45 2658 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2659 */
2660 return;
9e353e3b 2661#endif
14a5cf38
JH		 2662#else /* STDIO_PTR_LVALUE */
2663 PerlProc_abort();
2664#endif /* STDIO_PTR_LVALUE */
2665 }
2666 /*
71200d45 2667 * Now (or only) set cnt
14a5cf38 2668 */
9e353e3b 2669#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2670 PerlSIO_set_cnt(stdio, cnt);
2671#else /* STDIO_CNT_LVALUE */
9e353e3b 2672#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2673 PerlSIO_set_ptr(stdio,
2674 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2675 cnt));
2676#else /* STDIO_PTR_LVAL_SETS_CNT */
2677 PerlProc_abort();
2678#endif /* STDIO_PTR_LVAL_SETS_CNT */
2679#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2680}
2681
2682#endif
2683
71200d45 2684PerlIO *
8cf8f3d1 2685PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 2686{
b77c74bc
NIS		 2687 /* This assumes no layers underneath - which is what
2688 happens, but is not how I remember it. NI-S 2001/10/16
2689 */
2690 int fd = PerlLIO_dup(PerlIO_fileno(o));
2691 if (fd >= 0) {
2692 char buf[8];
2693 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2694 if (stdio) {
2695 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2696 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2697 }
2698 else {
2699 PerlSIO_fclose(stdio);
2700 }
2701 }
2702 else {
2703 PerlLIO_close(fd);
2704 f = NULL;
2705 }
2706 }
2707 return f;
71200d45
NIS		 2708}
2709
9e353e3b 2710PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2711 "stdio",
2712 sizeof(PerlIOStdio),
2713 PERLIO_K_BUFFERED,
2714 PerlIOBase_pushed,
2715 PerlIOBase_noop_ok,
2716 PerlIOStdio_open,
2717 NULL,
2718 PerlIOStdio_fileno,
71200d45 2719 PerlIOStdio_dup,
14a5cf38
JH		 2720 PerlIOStdio_read,
2721 PerlIOStdio_unread,
2722 PerlIOStdio_write,
2723 PerlIOStdio_seek,
2724 PerlIOStdio_tell,
2725 PerlIOStdio_close,
2726 PerlIOStdio_flush,
2727 PerlIOStdio_fill,
2728 PerlIOStdio_eof,
2729 PerlIOStdio_error,
2730 PerlIOStdio_clearerr,
2731 PerlIOStdio_setlinebuf,
9e353e3b 2732#ifdef FILE_base
14a5cf38
JH		 2733 PerlIOStdio_get_base,
2734 PerlIOStdio_get_bufsiz,
9e353e3b 2735#else
14a5cf38
JH		 2736 NULL,
2737 NULL,
9e353e3b
NIS		 2738#endif
2739#ifdef USE_STDIO_PTR
14a5cf38
JH		 2740 PerlIOStdio_get_ptr,
2741 PerlIOStdio_get_cnt,
0eb1d8a4 2742#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2743 PerlIOStdio_set_ptrcnt
2744#else /* STDIO_PTR_LVALUE */
2745 NULL
2746#endif /* STDIO_PTR_LVALUE */
2747#else /* USE_STDIO_PTR */
2748 NULL,
2749 NULL,
2750 NULL
2751#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2752};
2753
2754#undef PerlIO_exportFILE
2755FILE *
2756PerlIO_exportFILE(PerlIO *f, int fl)
2757{
14a5cf38
JH		 2758 FILE *stdio;
2759 PerlIO_flush(f);
2760 stdio = fdopen(PerlIO_fileno(f), "r+");
2761 if (stdio) {
2762 dTHX;
2763 PerlIOStdio *s =
2764 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2765 PerlIOStdio);
2766 s->stdio = stdio;
2767 }
2768 return stdio;
9e353e3b
NIS		 2769}
2770
2771#undef PerlIO_findFILE
2772FILE *
2773PerlIO_findFILE(PerlIO *f)
2774{
14a5cf38
JH		 2775 PerlIOl *l = *f;
2776 while (l) {
2777 if (l->tab == &PerlIO_stdio) {
2778 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2779 return s->stdio;
2780 }
2781 l = *PerlIONext(&l);
f7e7eb72 2782 }
14a5cf38 2783 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2784}
2785
2786#undef PerlIO_releaseFILE
2787void
2788PerlIO_releaseFILE(PerlIO *p, FILE *f)
2789{
2790}
2791
2792/*--------------------------------------------------------------------------------------*/
14a5cf38 2793/*
71200d45 2794 * perlio buffer layer
14a5cf38 2795 */
9e353e3b 2796
5e2ab84b 2797IV
e3f3bf95 2798PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2799{
14a5cf38
JH		 2800 dSYS;
2801 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2802 int fd = PerlIO_fileno(f);
2803 Off_t posn;
2804 if (fd >= 0 && PerlLIO_isatty(fd)) {
2805 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2806 }
2807 posn = PerlIO_tell(PerlIONext(f));
2808 if (posn != (Off_t) - 1) {
2809 b->posn = posn;
2810 }
2811 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2812}
2813
9e353e3b 2814PerlIO *
14a5cf38
JH		 2815PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2816 IV n, const char *mode, int fd, int imode, int perm,
2817 PerlIO *f, int narg, SV **args)
2818{
2819 if (f) {
2820 PerlIO *next = PerlIONext(f);
2821 PerlIO_funcs *tab =
2822 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2823 next =
2824 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2825 next, narg, args);
2826 if (!next
2827 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2828 return NULL;
2829 }
2830 }
2831 else {
2832 PerlIO_funcs *tab =
2833 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2834 int init = 0;
2835 if (*mode == 'I') {
2836 init = 1;
2837 /*
71200d45 2838 * mode++;
14a5cf38
JH		 2839 */
2840 }
2841 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2842 NULL, narg, args);
2843 if (f) {
2844 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2845 fd = PerlIO_fileno(f);
ee518936 2846#if O_BINARY != O_TEXT
14a5cf38 2847 /*
71200d45 2848 * do something about failing setmode()? --jhi
14a5cf38
JH		 2849 */
2850 PerlLIO_setmode(fd, O_BINARY);
ee518936 2851#endif
14a5cf38
JH		 2852 if (init && fd == 2) {
2853 /*
71200d45 2854 * Initial stderr is unbuffered
14a5cf38
JH		 2855 */
2856 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2857 }
2858 }
ee518936 2859 }
14a5cf38 2860 return f;
9e353e3b
NIS		 2861}
2862
14a5cf38
JH		 2863/*
2864 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2865 * read or write state
14a5cf38 2866 */
9e353e3b
NIS		 2867IV
2868PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2869{
14a5cf38
JH		 2870 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2871 int code = 0;
2872 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2873 /*
71200d45 2874 * write() the buffer
14a5cf38
JH		 2875 */
2876 STDCHAR *buf = b->buf;
2877 STDCHAR *p = buf;
2878 PerlIO *n = PerlIONext(f);
2879 while (p < b->ptr) {
2880 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2881 if (count > 0) {
2882 p += count;
2883 }
2884 else if (count < 0 || PerlIO_error(n)) {
2885 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2886 code = -1;
2887 break;
2888 }
2889 }
2890 b->posn += (p - buf);
2891 }
2892 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2893 STDCHAR *buf = PerlIO_get_base(f);
2894 /*
71200d45 2895 * Note position change
14a5cf38
JH		 2896 */
2897 b->posn += (b->ptr - buf);
2898 if (b->ptr < b->end) {
2899 /*
71200d45 2900 * We did not consume all of it
14a5cf38
JH		 2901 */
2902 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2903 b->posn = PerlIO_tell(PerlIONext(f));
2904 }
2905 }
2906 }
2907 b->ptr = b->end = b->buf;
2908 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2909 /*
71200d45 2910 * FIXME: Is this right for read case ?
14a5cf38
JH		 2911 */
2912 if (PerlIO_flush(PerlIONext(f)) != 0)
2913 code = -1;
2914 return code;
6f9d8c32
NIS		 2915}
2916
06da4f11
NIS		 2917IV
2918PerlIOBuf_fill(PerlIO *f)
2919{
14a5cf38
JH		 2920 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2921 PerlIO *n = PerlIONext(f);
2922 SSize_t avail;
2923 /*
2924 * FIXME: doing the down-stream flush is a bad idea if it causes
2925 * pre-read data in stdio buffer to be discarded but this is too
2926 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2927 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2928 */
2929 if (PerlIO_flush(f) != 0)
2930 return -1;
2931 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2932 PerlIOBase_flush_linebuf();
2933
2934 if (!b->buf)
2935 PerlIO_get_base(f); /* allocate via vtable */
2936
2937 b->ptr = b->end = b->buf;
2938 if (PerlIO_fast_gets(n)) {
2939 /*
2940 * Layer below is also buffered We do _NOT_ want to call its
2941 * ->Read() because that will loop till it gets what we asked for
2942 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2943 * hand, or ask it to fill _once_.
14a5cf38
JH		 2944 */
2945 avail = PerlIO_get_cnt(n);
2946 if (avail <= 0) {
2947 avail = PerlIO_fill(n);
2948 if (avail == 0)
2949 avail = PerlIO_get_cnt(n);
2950 else {
2951 if (!PerlIO_error(n) && PerlIO_eof(n))
2952 avail = 0;
2953 }
2954 }
2955 if (avail > 0) {
2956 STDCHAR *ptr = PerlIO_get_ptr(n);
2957 SSize_t cnt = avail;
2958 if (avail > b->bufsiz)
2959 avail = b->bufsiz;
2960 Copy(ptr, b->buf, avail, STDCHAR);
2961 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2962 }
2963 }
2964 else {
2965 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2966 }
2967 if (avail <= 0) {
2968 if (avail == 0)
2969 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2970 else
2971 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2972 return -1;
2973 }
2974 b->end = b->buf + avail;
2975 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2976 return 0;
06da4f11
NIS		 2977}
2978
6f9d8c32 2979SSize_t
9e353e3b 2980PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2981{
14a5cf38
JH		 2982 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2983 if (f) {
2984 if (!b->ptr)
2985 PerlIO_get_base(f);
2986 return PerlIOBase_read(f, vbuf, count);
2987 }
2988 return 0;
6f9d8c32
NIS		 2989}
2990
9e353e3b
NIS		 2991SSize_t
2992PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2993{
14a5cf38
JH		 2994 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2995 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2996 SSize_t unread = 0;
2997 SSize_t avail;
2998 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2999 PerlIO_flush(f);
3000 if (!b->buf)
3001 PerlIO_get_base(f);
3002 if (b->buf) {
3003 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3004 /*
3005 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3006 * which have been read back to buffer start
14a5cf38
JH		 3007 */
3008 avail = (b->ptr - b->buf);
3009 }
3010 else {
3011 /*
3012 * Buffer is idle, set it up so whole buffer is available for
71200d45 3013 * unread
14a5cf38
JH		 3014 */
3015 avail = b->bufsiz;
3016 b->end = b->buf + avail;
3017 b->ptr = b->end;
3018 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3019 /*
71200d45 3020 * Buffer extends _back_ from where we are now
14a5cf38
JH		 3021 */
3022 b->posn -= b->bufsiz;
3023 }
3024 if (avail > (SSize_t) count) {
3025 /*
71200d45 3026 * If we have space for more than count, just move count
14a5cf38
JH		 3027 */
3028 avail = count;
3029 }
3030 if (avail > 0) {
3031 b->ptr -= avail;
3032 buf -= avail;
3033 /*
3034 * In simple stdio-like ungetc() case chars will be already
71200d45 3035 * there
14a5cf38
JH		 3036 */
3037 if (buf != b->ptr) {
3038 Copy(buf, b->ptr, avail, STDCHAR);
3039 }
3040 count -= avail;
3041 unread += avail;
3042 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3043 }
3044 }
3045 return unread;
760ac839
LW		 3046}
3047
9e353e3b
NIS		 3048SSize_t
3049PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 3050{
14a5cf38
JH		 3051 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3052 const STDCHAR *buf = (const STDCHAR *) vbuf;
3053 Size_t written = 0;
3054 if (!b->buf)
3055 PerlIO_get_base(f);
3056 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3057 return 0;
3058 while (count > 0) {
3059 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3060 if ((SSize_t) count < avail)
3061 avail = count;
3062 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3063 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3064 while (avail > 0) {
3065 int ch = *buf++;
3066 *(b->ptr)++ = ch;
3067 count--;
3068 avail--;
3069 written++;
3070 if (ch == '\n') {
3071 PerlIO_flush(f);
3072 break;
3073 }
3074 }
3075 }
3076 else {
3077 if (avail) {
3078 Copy(buf, b->ptr, avail, STDCHAR);
3079 count -= avail;
3080 buf += avail;
3081 written += avail;
3082 b->ptr += avail;
3083 }
3084 }
3085 if (b->ptr >= (b->buf + b->bufsiz))
3086 PerlIO_flush(f);
3087 }
3088 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3089 PerlIO_flush(f);
3090 return written;
9e353e3b
NIS		 3091}
3092
3093IV
3094PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3095{
14a5cf38
JH		 3096 IV code;
3097 if ((code = PerlIO_flush(f)) == 0) {
3098 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3099 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3100 code = PerlIO_seek(PerlIONext(f), offset, whence);
3101 if (code == 0) {
3102 b->posn = PerlIO_tell(PerlIONext(f));
3103 }
9e353e3b 3104 }
14a5cf38 3105 return code;
9e353e3b
NIS		 3106}
3107
3108Off_t
3109PerlIOBuf_tell(PerlIO *f)
3110{
14a5cf38
JH		 3111 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3112 /*
71200d45 3113 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3114 */
3115 Off_t posn = b->posn;
3116 if (b->buf) {
3117 /*
71200d45 3118 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3119 */
3120 posn += (b->ptr - b->buf);
3121 }
3122 return posn;
9e353e3b
NIS		 3123}
3124
3125IV
3126PerlIOBuf_close(PerlIO *f)
3127{
14a5cf38
JH		 3128 IV code = PerlIOBase_close(f);
3129 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3130 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3131 Safefree(b->buf);
14a5cf38
JH		 3132 }
3133 b->buf = NULL;
3134 b->ptr = b->end = b->buf;
3135 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3136 return code;
760ac839
LW		 3137}
3138
9e353e3b
NIS		 3139STDCHAR *
3140PerlIOBuf_get_ptr(PerlIO *f)
3141{
14a5cf38
JH		 3142 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3143 if (!b->buf)
3144 PerlIO_get_base(f);
3145 return b->ptr;
9e353e3b
NIS		 3146}
3147
05d1247b 3148SSize_t
9e353e3b
NIS		 3149PerlIOBuf_get_cnt(PerlIO *f)
3150{
14a5cf38
JH		 3151 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3152 if (!b->buf)
3153 PerlIO_get_base(f);
3154 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3155 return (b->end - b->ptr);
3156 return 0;
9e353e3b
NIS		 3157}
3158
3159STDCHAR *
3160PerlIOBuf_get_base(PerlIO *f)
3161{
14a5cf38
JH		 3162 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3163 if (!b->buf) {
3164 if (!b->bufsiz)
3165 b->bufsiz = 4096;
a1ea730d 3166 b->buf =
7fcdafbd 3167 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3168 if (!b->buf) {
3169 b->buf = (STDCHAR *) & b->oneword;
3170 b->bufsiz = sizeof(b->oneword);
3171 }
3172 b->ptr = b->buf;
3173 b->end = b->ptr;
06da4f11 3174 }
14a5cf38 3175 return b->buf;
9e353e3b
NIS		 3176}
3177
3178Size_t
3179PerlIOBuf_bufsiz(PerlIO *f)
3180{
14a5cf38
JH		 3181 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3182 if (!b->buf)
3183 PerlIO_get_base(f);
3184 return (b->end - b->buf);
9e353e3b
NIS		 3185}
3186
3187void
14a5cf38 3188PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3189{
14a5cf38
JH		 3190 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3191 if (!b->buf)
3192 PerlIO_get_base(f);
3193 b->ptr = ptr;
3194 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3195 dTHX;
3196 assert(PerlIO_get_cnt(f) == cnt);
3197 assert(b->ptr >= b->buf);
3198 }
3199 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3200}
3201
71200d45 3202PerlIO *
8cf8f3d1 3203PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3204{
a8fc9800 3205 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3206}
3207
3208
3209
9e353e3b 3210PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3211 "perlio",
3212 sizeof(PerlIOBuf),
3213 PERLIO_K_BUFFERED,
3214 PerlIOBuf_pushed,
3215 PerlIOBase_noop_ok,
3216 PerlIOBuf_open,
3217 NULL,
3218 PerlIOBase_fileno,
71200d45 3219 PerlIOBuf_dup,
14a5cf38
JH		 3220 PerlIOBuf_read,
3221 PerlIOBuf_unread,
3222 PerlIOBuf_write,
3223 PerlIOBuf_seek,
3224 PerlIOBuf_tell,
3225 PerlIOBuf_close,
3226 PerlIOBuf_flush,
3227 PerlIOBuf_fill,
3228 PerlIOBase_eof,
3229 PerlIOBase_error,
3230 PerlIOBase_clearerr,
3231 PerlIOBase_setlinebuf,
3232 PerlIOBuf_get_base,
3233 PerlIOBuf_bufsiz,
3234 PerlIOBuf_get_ptr,
3235 PerlIOBuf_get_cnt,
3236 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3237};
3238
66ecd56b 3239/*--------------------------------------------------------------------------------------*/
14a5cf38 3240/*
71200d45 3241 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3242 */
5e2ab84b
NIS		 3243
3244IV
3245PerlIOPending_fill(PerlIO *f)
3246{
14a5cf38 3247 /*
71200d45 3248 * Should never happen
14a5cf38
JH		 3249 */
3250 PerlIO_flush(f);
3251 return 0;
5e2ab84b
NIS		 3252}
3253
3254IV
3255PerlIOPending_close(PerlIO *f)
3256{
14a5cf38 3257 /*
71200d45 3258 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3259 */
3260 PerlIO_flush(f);
3261 return PerlIO_close(f);
5e2ab84b
NIS		 3262}
3263
3264IV
3265PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3266{
14a5cf38 3267 /*
71200d45 3268 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3269 */
3270 PerlIO_flush(f);
3271 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3272}
3273
3274
3275IV
3276PerlIOPending_flush(PerlIO *f)
3277{
14a5cf38
JH		 3278 dTHX;
3279 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3280 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3281 Safefree(b->buf);
14a5cf38
JH		 3282 b->buf = NULL;
3283 }
3284 PerlIO_pop(aTHX_ f);
3285 return 0;
5e2ab84b
NIS		 3286}
3287
3288void
14a5cf38 3289PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3290{
14a5cf38
JH		 3291 if (cnt <= 0) {
3292 PerlIO_flush(f);
3293 }
3294 else {
3295 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3296 }
5e2ab84b
NIS		 3297}
3298
3299IV
14a5cf38 3300PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3301{
14a5cf38
JH		 3302 IV code = PerlIOBase_pushed(f, mode, arg);
3303 PerlIOl *l = PerlIOBase(f);
3304 /*
71200d45
NIS		 3305 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3306 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3307 */
3308 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3309 (PerlIOBase(PerlIONext(f))->
3310 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3311 return code;
5e2ab84b
NIS		 3312}
3313
3314SSize_t
3315PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3316{
14a5cf38
JH		 3317 SSize_t avail = PerlIO_get_cnt(f);
3318 SSize_t got = 0;
3319 if (count < avail)
3320 avail = count;
3321 if (avail > 0)
3322 got = PerlIOBuf_read(f, vbuf, avail);
3323 if (got >= 0 && got < count) {
3324 SSize_t more =
3325 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3326 if (more >= 0 || got == 0)
3327 got += more;
3328 }
3329 return got;
5e2ab84b
NIS		 3330}
3331
5e2ab84b 3332PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3333 "pending",
3334 sizeof(PerlIOBuf),
3335 PERLIO_K_BUFFERED,
3336 PerlIOPending_pushed,
3337 PerlIOBase_noop_ok,
3338 NULL,
3339 NULL,
3340 PerlIOBase_fileno,
71200d45 3341 PerlIOBuf_dup,
14a5cf38
JH		 3342 PerlIOPending_read,
3343 PerlIOBuf_unread,
3344 PerlIOBuf_write,
3345 PerlIOPending_seek,
3346 PerlIOBuf_tell,
3347 PerlIOPending_close,
3348 PerlIOPending_flush,
3349 PerlIOPending_fill,
3350 PerlIOBase_eof,
3351 PerlIOBase_error,
3352 PerlIOBase_clearerr,
3353 PerlIOBase_setlinebuf,
3354 PerlIOBuf_get_base,
3355 PerlIOBuf_bufsiz,
3356 PerlIOBuf_get_ptr,
3357 PerlIOBuf_get_cnt,
3358 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3359};
3360
3361
3362
3363/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3364/*
3365 * crlf - translation On read translate CR,LF to "\n" we do this by
3366 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3367 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3368 */
3369
14a5cf38
JH		 3370typedef struct {
3371 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3372 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3373 * buffer */
99efab12
NIS		 3374} PerlIOCrlf;
3375
f5b9d040 3376IV
14a5cf38 3377PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3378{
14a5cf38
JH		 3379 IV code;
3380 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3381 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3382#if 0
14a5cf38
JH		 3383 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3384 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3385 PerlIOBase(f)->flags);
5e2ab84b 3386#endif
14a5cf38 3387 return code;
f5b9d040
NIS		 3388}
3389
3390
99efab12
NIS		 3391SSize_t
3392PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3393{
14a5cf38
JH		 3394 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3395 if (c->nl) {
3396 *(c->nl) = 0xd;
3397 c->nl = NULL;
3398 }
3399 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3400 return PerlIOBuf_unread(f, vbuf, count);
3401 else {
3402 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3403 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3404 SSize_t unread = 0;
3405 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3406 PerlIO_flush(f);
3407 if (!b->buf)
3408 PerlIO_get_base(f);
3409 if (b->buf) {
3410 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3411 b->end = b->ptr = b->buf + b->bufsiz;
3412 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3413 b->posn -= b->bufsiz;
3414 }
3415 while (count > 0 && b->ptr > b->buf) {
3416 int ch = *--buf;
3417 if (ch == '\n') {
3418 if (b->ptr - 2 >= b->buf) {
3419 *--(b->ptr) = 0xa;
3420 *--(b->ptr) = 0xd;
3421 unread++;
3422 count--;
3423 }
3424 else {
3425 buf++;
3426 break;
3427 }
3428 }
3429 else {
3430 *--(b->ptr) = ch;
3431 unread++;
3432 count--;
3433 }
3434 }
3435 }
3436 return unread;
3437 }
99efab12
NIS		 3438}
3439
3440SSize_t
3441PerlIOCrlf_get_cnt(PerlIO *f)
3442{
14a5cf38
JH		 3443 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3444 if (!b->buf)
3445 PerlIO_get_base(f);
3446 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3447 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3448 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3449 STDCHAR *nl = b->ptr;
3450 scan:
3451 while (nl < b->end && *nl != 0xd)
3452 nl++;
3453 if (nl < b->end && *nl == 0xd) {
3454 test:
3455 if (nl + 1 < b->end) {
3456 if (nl[1] == 0xa) {
3457 *nl = '\n';
3458 c->nl = nl;
3459 }
3460 else {
3461 /*
71200d45 3462 * Not CR,LF but just CR
14a5cf38
JH		 3463 */
3464 nl++;
3465 goto scan;
3466 }
3467 }
3468 else {
3469 /*
71200d45 3470 * Blast - found CR as last char in buffer
14a5cf38
JH		 3471 */
3472 if (b->ptr < nl) {
3473 /*
3474 * They may not care, defer work as long as
71200d45 3475 * possible
14a5cf38
JH		 3476 */
3477 return (nl - b->ptr);
3478 }
3479 else {
3480 int code;
3481 b->ptr++; /* say we have read it as far as
3482 * flush() is concerned */
3483 b->buf++; /* Leave space an front of buffer */
3484 b->bufsiz--; /* Buffer is thus smaller */
3485 code = PerlIO_fill(f); /* Fetch some more */
3486 b->bufsiz++; /* Restore size for next time */
3487 b->buf--; /* Point at space */
3488 b->ptr = nl = b->buf; /* Which is what we hand
3489 * off */
3490 b->posn--; /* Buffer starts here */
3491 *nl = 0xd; /* Fill in the CR */
3492 if (code == 0)
3493 goto test; /* fill() call worked */
3494 /*
71200d45 3495 * CR at EOF - just fall through
14a5cf38
JH		 3496 */
3497 }
3498 }
3499 }
3500 }
3501 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3502 }
3503 return 0;
99efab12
NIS		 3504}
3505
3506void
14a5cf38
JH		 3507PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3508{
3509 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3510 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3511 IV flags = PerlIOBase(f)->flags;
3512 if (!b->buf)
3513 PerlIO_get_base(f);
3514 if (!ptr) {
3515 if (c->nl)
3516 ptr = c->nl + 1;
3517 else {
3518 ptr = b->end;
3519 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3520 ptr--;
3521 }
3522 ptr -= cnt;
3523 }
3524 else {
3525 /*
71200d45 3526 * Test code - delete when it works ...
14a5cf38
JH		 3527 */
3528 STDCHAR *chk;
3529 if (c->nl)
3530 chk = c->nl + 1;
3531 else {
3532 chk = b->end;
3533 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3534 chk--;
3535 }
3536 chk -= cnt;
3537
3538 if (ptr != chk) {
3539 dTHX;
3540 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3541 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3542 b->end, cnt);
3543 }
3544 }
3545 if (c->nl) {
3546 if (ptr > c->nl) {
3547 /*
71200d45 3548 * They have taken what we lied about
14a5cf38
JH		 3549 */
3550 *(c->nl) = 0xd;
3551 c->nl = NULL;
3552 ptr++;
3553 }
3554 }
3555 b->ptr = ptr;
3556 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3557}
3558
3559SSize_t
3560PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3561{
14a5cf38
JH		 3562 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3563 return PerlIOBuf_write(f, vbuf, count);
3564 else {
3565 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3566 const STDCHAR *buf = (const STDCHAR *) vbuf;
3567 const STDCHAR *ebuf = buf + count;
3568 if (!b->buf)
3569 PerlIO_get_base(f);
3570 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3571 return 0;
3572 while (buf < ebuf) {
3573 STDCHAR *eptr = b->buf + b->bufsiz;
3574 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3575 while (buf < ebuf && b->ptr < eptr) {
3576 if (*buf == '\n') {
3577 if ((b->ptr + 2) > eptr) {
3578 /*
71200d45 3579 * Not room for both
14a5cf38
JH		 3580 */
3581 PerlIO_flush(f);
3582 break;
3583 }
3584 else {
3585 *(b->ptr)++ = 0xd; /* CR */
3586 *(b->ptr)++ = 0xa; /* LF */
3587 buf++;
3588 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3589 PerlIO_flush(f);
3590 break;
3591 }
3592 }
3593 }
3594 else {
3595 int ch = *buf++;
3596 *(b->ptr)++ = ch;
3597 }
3598 if (b->ptr >= eptr) {
3599 PerlIO_flush(f);
3600 break;
3601 }
3602 }
3603 }
3604 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3605 PerlIO_flush(f);
3606 return (buf - (STDCHAR *) vbuf);
3607 }
99efab12
NIS		 3608}
3609
3610IV
3611PerlIOCrlf_flush(PerlIO *f)
3612{
14a5cf38
JH		 3613 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3614 if (c->nl) {
3615 *(c->nl) = 0xd;
3616 c->nl = NULL;
3617 }
3618 return PerlIOBuf_flush(f);
99efab12
NIS		 3619}
3620
66ecd56b 3621PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3622 "crlf",
3623 sizeof(PerlIOCrlf),
3624 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3625 PerlIOCrlf_pushed,
3626 PerlIOBase_noop_ok, /* popped */
3627 PerlIOBuf_open,
3628 NULL,
3629 PerlIOBase_fileno,
71200d45 3630 PerlIOBuf_dup,
14a5cf38
JH		 3631 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3632 * ... */
3633 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3634 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3635 PerlIOBuf_seek,
3636 PerlIOBuf_tell,
3637 PerlIOBuf_close,
3638 PerlIOCrlf_flush,
3639 PerlIOBuf_fill,
3640 PerlIOBase_eof,
3641 PerlIOBase_error,
3642 PerlIOBase_clearerr,
3643 PerlIOBase_setlinebuf,
3644 PerlIOBuf_get_base,
3645 PerlIOBuf_bufsiz,
3646 PerlIOBuf_get_ptr,
3647 PerlIOCrlf_get_cnt,
3648 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3649};
3650
06da4f11
NIS		 3651#ifdef HAS_MMAP
3652/*--------------------------------------------------------------------------------------*/
14a5cf38 3653/*
71200d45 3654 * mmap as "buffer" layer
14a5cf38 3655 */
06da4f11 3656
14a5cf38
JH		 3657typedef struct {
3658 PerlIOBuf base; /* PerlIOBuf stuff */
3659 Mmap_t mptr; /* Mapped address */
3660 Size_t len; /* mapped length */
3661 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3662} PerlIOMmap;
3663
c3d7c7c9
NIS		 3664static size_t page_size = 0;
3665
06da4f11
NIS		 3666IV
3667PerlIOMmap_map(PerlIO *f)
3668{
14a5cf38
JH		 3669 dTHX;
3670 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3671 IV flags = PerlIOBase(f)->flags;
3672 IV code = 0;
3673 if (m->len)
3674 abort();
3675 if (flags & PERLIO_F_CANREAD) {
3676 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3677 int fd = PerlIO_fileno(f);
10eefe7f
CB		 3678 Stat_t st;
3679 code = Fstat(fd, &st);
14a5cf38
JH		 3680 if (code == 0 && S_ISREG(st.st_mode)) {
3681 SSize_t len = st.st_size - b->posn;
3682 if (len > 0) {
3683 Off_t posn;
3684 if (!page_size) {
68d873c6 3685#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3686 {
3687 SETERRNO(0, SS$_NORMAL);
68d873c6 3688# ifdef _SC_PAGESIZE
14a5cf38 3689 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3690# else
14a5cf38 3691 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3692# endif
14a5cf38
JH		 3693 if ((long) page_size < 0) {
3694 if (errno) {
3695 SV *error = ERRSV;
3696 char *msg;
3697 STRLEN n_a;
3698 (void) SvUPGRADE(error, SVt_PV);
3699 msg = SvPVx(error, n_a);
3700 Perl_croak(aTHX_ "panic: sysconf: %s",
3701 msg);
3702 }
3703 else
3704 Perl_croak(aTHX_
3705 "panic: sysconf: pagesize unknown");
3706 }
3707 }
68d873c6
JH		 3708#else
3709# ifdef HAS_GETPAGESIZE
14a5cf38 3710 page_size = getpagesize();
68d873c6
JH		 3711# else
3712# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3713 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3714# endif
3715# endif
3716#endif
14a5cf38
JH		 3717 if ((IV) page_size <= 0)
3718 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3719 (IV) page_size);
3720 }
3721 if (b->posn < 0) {
3722 /*
3723 * This is a hack - should never happen - open should
71200d45 3724 * have set it !
14a5cf38
JH		 3725 */
3726 b->posn = PerlIO_tell(PerlIONext(f));
3727 }
3728 posn = (b->posn / page_size) * page_size;
3729 len = st.st_size - posn;
3730 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3731 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3732#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3733 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3734#endif
a5262162 3735#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3736 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3737#endif
14a5cf38
JH		 3738 PerlIOBase(f)->flags =
3739 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3740 b->end = ((STDCHAR *) m->mptr) + len;
3741 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3742 b->ptr = b->buf;
3743 m->len = len;
3744 }
3745 else {
3746 b->buf = NULL;
3747 }
3748 }
3749 else {
3750 PerlIOBase(f)->flags =
3751 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3752 b->buf = NULL;
3753 b->ptr = b->end = b->ptr;
3754 code = -1;
3755 }
3756 }
3757 }
3758 return code;
06da4f11
NIS		 3759}
3760
3761IV
3762PerlIOMmap_unmap(PerlIO *f)
3763{
14a5cf38
JH		 3764 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3765 PerlIOBuf *b = &m->base;
3766 IV code = 0;
3767 if (m->len) {
3768 if (b->buf) {
3769 code = munmap(m->mptr, m->len);
3770 b->buf = NULL;
3771 m->len = 0;
3772 m->mptr = NULL;
3773 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3774 code = -1;
3775 }
3776 b->ptr = b->end = b->buf;
3777 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3778 }
3779 return code;
06da4f11
NIS		 3780}
3781
3782STDCHAR *
3783PerlIOMmap_get_base(PerlIO *f)
3784{
14a5cf38
JH		 3785 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3786 PerlIOBuf *b = &m->base;
3787 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3788 /*
71200d45 3789 * Already have a readbuffer in progress
14a5cf38
JH		 3790 */
3791 return b->buf;
3792 }
3793 if (b->buf) {
3794 /*
71200d45 3795 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3796 */
3797 m->bbuf = b->buf; /* save it in case we need it again */
3798 b->buf = NULL; /* Clear to trigger below */
3799 }
3800 if (!b->buf) {
3801 PerlIOMmap_map(f); /* Try and map it */
3802 if (!b->buf) {
3803 /*
71200d45 3804 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3805 */
3806 b->buf = m->bbuf;
3807 }
3808 }
3809 b->ptr = b->end = b->buf;
3810 if (b->buf)
3811 return b->buf;
3812 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3813}
3814
3815SSize_t
3816PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3817{
14a5cf38
JH		 3818 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3819 PerlIOBuf *b = &m->base;
3820 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3821 PerlIO_flush(f);
3822 if (b->ptr && (b->ptr - count) >= b->buf
3823 && memEQ(b->ptr - count, vbuf, count)) {
3824 b->ptr -= count;
3825 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3826 return count;
3827 }
3828 if (m->len) {
3829 /*
71200d45 3830 * Loose the unwritable mapped buffer
14a5cf38
JH		 3831 */
3832 PerlIO_flush(f);
3833 /*
71200d45 3834 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3835 */
3836 if (!b->buf && m->bbuf)
3837 b->buf = m->bbuf;
3838 if (!b->buf) {
3839 PerlIOBuf_get_base(f);
3840 m->bbuf = b->buf;
3841 }
3842 }
3843 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3844}
3845
3846SSize_t
3847PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3848{
14a5cf38
JH		 3849 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3850 PerlIOBuf *b = &m->base;
3851 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3852 /*
71200d45 3853 * No, or wrong sort of, buffer
14a5cf38
JH		 3854 */
3855 if (m->len) {
3856 if (PerlIOMmap_unmap(f) != 0)
3857 return 0;
3858 }
3859 /*
71200d45 3860 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3861 */
3862 if (!b->buf && m->bbuf)
3863 b->buf = m->bbuf;
3864 if (!b->buf) {
3865 PerlIOBuf_get_base(f);
3866 m->bbuf = b->buf;
3867 }
06da4f11 3868 }
14a5cf38 3869 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3870}
3871
3872IV
3873PerlIOMmap_flush(PerlIO *f)
3874{
14a5cf38
JH		 3875 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3876 PerlIOBuf *b = &m->base;
3877 IV code = PerlIOBuf_flush(f);
3878 /*
71200d45 3879 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3880 */
3881 if (b->buf) {
3882 if (m->len) {
3883 /*
71200d45 3884 * Unmap the buffer
14a5cf38
JH		 3885 */
3886 if (PerlIOMmap_unmap(f) != 0)
3887 code = -1;
3888 }
3889 else {
3890 /*
3891 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3892 * remember it in case we need one later
14a5cf38
JH		 3893 */
3894 m->bbuf = b->buf;
3895 }
3896 }
3897 return code;
06da4f11
NIS		 3898}
3899
3900IV
3901PerlIOMmap_fill(PerlIO *f)
3902{
14a5cf38
JH		 3903 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3904 IV code = PerlIO_flush(f);
3905 if (code == 0 && !b->buf) {
3906 code = PerlIOMmap_map(f);
3907 }
3908 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3909 code = PerlIOBuf_fill(f);
3910 }
3911 return code;
06da4f11
NIS		 3912}
3913
3914IV
3915PerlIOMmap_close(PerlIO *f)
3916{
14a5cf38
JH		 3917 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3918 PerlIOBuf *b = &m->base;
3919 IV code = PerlIO_flush(f);
3920 if (m->bbuf) {
3921 b->buf = m->bbuf;
3922 m->bbuf = NULL;
3923 b->ptr = b->end = b->buf;
3924 }
3925 if (PerlIOBuf_close(f) != 0)
3926 code = -1;
3927 return code;
06da4f11
NIS		 3928}
3929
71200d45 3930PerlIO *
8cf8f3d1 3931PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3932{
a8fc9800 3933 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3934}
3935
06da4f11
NIS		 3936
3937PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3938 "mmap",
3939 sizeof(PerlIOMmap),
3940 PERLIO_K_BUFFERED,
3941 PerlIOBuf_pushed,
3942 PerlIOBase_noop_ok,
3943 PerlIOBuf_open,
3944 NULL,
3945 PerlIOBase_fileno,
71200d45 3946 PerlIOMmap_dup,
14a5cf38
JH		 3947 PerlIOBuf_read,
3948 PerlIOMmap_unread,
3949 PerlIOMmap_write,
3950 PerlIOBuf_seek,
3951 PerlIOBuf_tell,
3952 PerlIOBuf_close,
3953 PerlIOMmap_flush,
3954 PerlIOMmap_fill,
3955 PerlIOBase_eof,
3956 PerlIOBase_error,
3957 PerlIOBase_clearerr,
3958 PerlIOBase_setlinebuf,
3959 PerlIOMmap_get_base,
3960 PerlIOBuf_bufsiz,
3961 PerlIOBuf_get_ptr,
3962 PerlIOBuf_get_cnt,
3963 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3964};
3965
14a5cf38 3966#endif /* HAS_MMAP */
06da4f11 3967
9e353e3b
NIS		 3968#undef PerlIO_stdin
3969PerlIO *
3970PerlIO_stdin(void)
3971{
a1ea730d
NIS		 3972 dTHX;
3973 if (!PL_perlio) {
14a5cf38
JH		 3974 PerlIO_stdstreams(aTHX);
3975 }
a1ea730d 3976 return &PL_perlio[1];
9e353e3b
NIS		 3977}
3978
3979#undef PerlIO_stdout
3980PerlIO *
3981PerlIO_stdout(void)
3982{
a1ea730d
NIS		 3983 dTHX;
3984 if (!PL_perlio) {
14a5cf38
JH		 3985 PerlIO_stdstreams(aTHX);
3986 }
a1ea730d 3987 return &PL_perlio[2];
9e353e3b
NIS		 3988}
3989
3990#undef PerlIO_stderr
3991PerlIO *
3992PerlIO_stderr(void)
3993{
a1ea730d
NIS		 3994 dTHX;
3995 if (!PL_perlio) {
14a5cf38
JH		 3996 PerlIO_stdstreams(aTHX);
3997 }
a1ea730d 3998 return &PL_perlio[3];
9e353e3b
NIS		 3999}
4000
4001/*--------------------------------------------------------------------------------------*/
4002
4003#undef PerlIO_getname
4004char *
4005PerlIO_getname(PerlIO *f, char *buf)
4006{
14a5cf38
JH		 4007 dTHX;
4008 char *name = NULL;
a15cef0c 4009#ifdef VMS
14a5cf38
JH		 4010 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4011 if (stdio)
4012 name = fgetname(stdio, buf);
a15cef0c 4013#else
14a5cf38 4014 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 4015#endif
14a5cf38 4016 return name;
9e353e3b
NIS		 4017}
4018
4019
4020/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 4021/*
4022 * Functions which can be called on any kind of PerlIO implemented in
71200d45 4023 * terms of above
14a5cf38 4024 */
9e353e3b
NIS		 4025
4026#undef PerlIO_getc
6f9d8c32 4027int
9e353e3b 4028PerlIO_getc(PerlIO *f)
760ac839 4029{
14a5cf38
JH		 4030 STDCHAR buf[1];
4031 SSize_t count = PerlIO_read(f, buf, 1);
4032 if (count == 1) {
4033 return (unsigned char) buf[0];
4034 }
4035 return EOF;
313ca112
NIS		 4036}
4037
4038#undef PerlIO_ungetc
4039int
4040PerlIO_ungetc(PerlIO *f, int ch)
4041{
14a5cf38
JH		 4042 if (ch != EOF) {
4043 STDCHAR buf = ch;
4044 if (PerlIO_unread(f, &buf, 1) == 1)
4045 return ch;
4046 }
4047 return EOF;