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Win32 PerlIO_cleanup special cases should no longer be required.
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
71200d45 2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW		 5 */
6
14a5cf38 7/*
71200d45 8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 9 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 10 * Invent a dSYS macro to abstract this out
14a5cf38 11 */
7bcba3d4
NIS		 12#ifdef PERL_IMPLICIT_SYS
13#define dSYS dTHX
14#else
15#define dSYS dNOOP
16#endif
17
760ac839 18#define VOIDUSED 1
12ae5dfc
JH		 19#ifdef PERL_MICRO
20# include "uconfig.h"
21#else
22# include "config.h"
23#endif
760ac839 24
6f9d8c32 25#define PERLIO_NOT_STDIO 0
760ac839 26#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 27/*
71200d45 28 * #define PerlIO FILE
14a5cf38 29 */
760ac839
LW		 30#endif
31/*
6f9d8c32 32 * This file provides those parts of PerlIO abstraction
88b61e10 33 * which are not #defined in perlio.h.
6f9d8c32 34 * Which these are depends on various Configure #ifdef's
760ac839
LW		 35 */
36
37#include "EXTERN.h"
864dbfa3 38#define PERL_IN_PERLIO_C
760ac839
LW		 39#include "perl.h"
40
0c4f7ff0
NIS		 41#include "XSUB.h"
42
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
8ac85365 254PerlIO_init(void)
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
c78749f2 291PerlIO_init(void)
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)
525 arg = sv_dup(proto->array[i].arg,param);
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{
3a1ee7e8
NIS		 534 PerlIO **table = &proto->Iperlio;
535 PerlIO *f;
536 PL_perlio = NULL;
537 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
538 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
539 PerlIO_allocate(aTHX); /* root slot is never used */
540 while ((f = *table)) {
541 int i;
542 table = (PerlIO **) (f++);
543 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
544 if (*f) {
545 PerlIO_fdupopen(aTHX_ f, param);
546 }
547 f++;
548 }
549 }
9a6404c5
DM		 550}
551
552void
3a1ee7e8 553PerlIO_cleanup(pTHX)
05d1247b 554{
a1ea730d 555 PerlIO_cleantable(aTHX_ &PL_perlio);
6f9d8c32
NIS		 556}
557
9e353e3b 558void
13621cfb
NIS		 559PerlIO_destruct(pTHX)
560{
a1ea730d 561 PerlIO **table = &PL_perlio;
14a5cf38
JH		 562 PerlIO *f;
563 while ((f = *table)) {
564 int i;
565 table = (PerlIO **) (f++);
566 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
567 PerlIO *x = f;
568 PerlIOl *l;
569 while ((l = *x)) {
570 if (l->tab->kind & PERLIO_K_DESTRUCT) {
571 PerlIO_debug("Destruct popping %s\n", l->tab->name);
572 PerlIO_flush(x);
573 PerlIO_pop(aTHX_ x);
574 }
575 else {
576 x = PerlIONext(x);
577 }
578 }
579 f++;
580 }
581 }
3a1ee7e8
NIS		 582 PerlIO_list_free(aTHX_ PL_known_layers);
583 PL_known_layers = NULL;
584 PerlIO_list_free(aTHX_ PL_def_layerlist);
585 PL_def_layerlist = NULL;
13621cfb
NIS		 586}
587
588void
a999f61b 589PerlIO_pop(pTHX_ PerlIO *f)
760ac839 590{
14a5cf38
JH		 591 PerlIOl *l = *f;
592 if (l) {
593 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
594 if (l->tab->Popped) {
595 /*
596 * If popped returns non-zero do not free its layer structure
597 * it has either done so itself, or it is shared and still in
71200d45 598 * use
14a5cf38
JH		 599 */
600 if ((*l->tab->Popped) (f) != 0)
601 return;
602 }
603 *f = l->next;;
3a1ee7e8 604 Safefree(l);
a8c08ecd 605 }
6f9d8c32
NIS		 606}
607
9e353e3b 608/*--------------------------------------------------------------------------------------*/
14a5cf38 609/*
71200d45 610 * XS Interface for perl code
14a5cf38 611 */
9e353e3b 612
fcf2db38 613PerlIO_funcs *
2edd7e44 614PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 615{
14a5cf38
JH		 616 IV i;
617 if ((SSize_t) len <= 0)
618 len = strlen(name);
3a1ee7e8
NIS		 619 for (i = 0; i < PL_known_layers->cur; i++) {
620 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38
JH		 621 if (memEQ(f->name, name, len)) {
622 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
623 return f;
624 }
625 }
3a1ee7e8
NIS		 626 if (load && PL_subname && PL_def_layerlist
627 && PL_def_layerlist->cur >= 2) {
14a5cf38
JH		 628 SV *pkgsv = newSVpvn("PerlIO", 6);
629 SV *layer = newSVpvn(name, len);
630 ENTER;
631 /*
71200d45 632 * The two SVs are magically freed by load_module
14a5cf38
JH		 633 */
634 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
635 LEAVE;
636 return PerlIO_find_layer(aTHX_ name, len, 0);
637 }
638 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
639 return NULL;
f3862f8b
NIS		 640}
641
2a1bc955 642#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 643
644static int
645perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
646{
14a5cf38
JH		 647 if (SvROK(sv)) {
648 IO *io = GvIOn((GV *) SvRV(sv));
649 PerlIO *ifp = IoIFP(io);
650 PerlIO *ofp = IoOFP(io);
651 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
652 }
653 return 0;
b13b2135
NIS		 654}
655
656static int
657perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
658{
14a5cf38
JH		 659 if (SvROK(sv)) {
660 IO *io = GvIOn((GV *) SvRV(sv));
661 PerlIO *ifp = IoIFP(io);
662 PerlIO *ofp = IoOFP(io);
663 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
664 }
665 return 0;
b13b2135
NIS		 666}
667
668static int
669perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
670{
14a5cf38
JH		 671 Perl_warn(aTHX_ "clear %" SVf, sv);
672 return 0;
b13b2135
NIS		 673}
674
675static int
676perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
677{
14a5cf38
JH		 678 Perl_warn(aTHX_ "free %" SVf, sv);
679 return 0;
b13b2135
NIS		 680}
681
682MGVTBL perlio_vtab = {
14a5cf38
JH		 683 perlio_mg_get,
684 perlio_mg_set,
685 NULL, /* len */
686 perlio_mg_clear,
687 perlio_mg_free
b13b2135
NIS		 688};
689
690XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
691{
14a5cf38
JH		 692 dXSARGS;
693 SV *sv = SvRV(ST(1));
694 AV *av = newAV();
695 MAGIC *mg;
696 int count = 0;
697 int i;
698 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
699 SvRMAGICAL_off(sv);
700 mg = mg_find(sv, PERL_MAGIC_ext);
701 mg->mg_virtual = &perlio_vtab;
702 mg_magical(sv);
703 Perl_warn(aTHX_ "attrib %" SVf, sv);
704 for (i = 2; i < items; i++) {
705 STRLEN len;
706 const char *name = SvPV(ST(i), len);
707 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
708 if (layer) {
709 av_push(av, SvREFCNT_inc(layer));
710 }
711 else {
712 ST(count) = ST(i);
713 count++;
714 }
715 }
716 SvREFCNT_dec(av);
717 XSRETURN(count);
718}
719
720#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 721
e3f3bf95
NIS		 722SV *
723PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 724{
14a5cf38
JH		 725 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
726 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
727 return sv;
e3f3bf95
NIS		 728}
729
0c4f7ff0
NIS		 730XS(XS_PerlIO__Layer__find)
731{
14a5cf38
JH		 732 dXSARGS;
733 if (items < 2)
734 Perl_croak(aTHX_ "Usage class->find(name[,load])");
735 else {
736 STRLEN len = 0;
737 char *name = SvPV(ST(1), len);
738 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
739 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
740 ST(0) =
741 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
742 &PL_sv_undef;
743 XSRETURN(1);
744 }
0c4f7ff0
NIS		 745}
746
e3f3bf95
NIS		 747void
748PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
749{
3a1ee7e8
NIS		 750 if (!PL_known_layers)
751 PL_known_layers = PerlIO_list_alloc(aTHX);
752 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
14a5cf38 753 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 754}
755
1141d9f8 756int
fcf2db38 757PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 758{
14a5cf38
JH		 759 if (names) {
760 const char *s = names;
761 while (*s) {
762 while (isSPACE(*s) || *s == ':')
763 s++;
764 if (*s) {
765 STRLEN llen = 0;
766 const char *e = s;
767 const char *as = Nullch;
768 STRLEN alen = 0;
769 if (!isIDFIRST(*s)) {
770 /*
771 * Message is consistent with how attribute lists are
772 * passed. Even though this means "foo : : bar" is
71200d45 773 * seen as an invalid separator character.
14a5cf38
JH		 774 */
775 char q = ((*s == '\'') ? '"' : '\'');
776 Perl_warn(aTHX_
777 "perlio: invalid separator character %c%c%c in layer specification list",
778 q, *s, q);
779 return -1;
780 }
781 do {
782 e++;
783 } while (isALNUM(*e));
784 llen = e - s;
785 if (*e == '(') {
786 int nesting = 1;
787 as = ++e;
788 while (nesting) {
789 switch (*e++) {
790 case ')':
791 if (--nesting == 0)
792 alen = (e - 1) - as;
793 break;
794 case '(':
795 ++nesting;
796 break;
797 case '\\':
798 /*
799 * It's a nul terminated string, not allowed
800 * to \ the terminating null. Anything other
71200d45 801 * character is passed over.
14a5cf38
JH		 802 */
803 if (*e++) {
804 break;
805 }
806 /*
71200d45 807 * Drop through
14a5cf38
JH		 808 */
809 case '\0':
810 e--;
811 Perl_warn(aTHX_
812 "perlio: argument list not closed for layer \"%.*s\"",
813 (int) (e - s), s);
814 return -1;
815 default:
816 /*
71200d45 817 * boring.
14a5cf38
JH		 818 */
819 break;
820 }
821 }
822 }
823 if (e > s) {
824 PerlIO_funcs *layer =
825 PerlIO_find_layer(aTHX_ s, llen, 1);
826 if (layer) {
3a1ee7e8 827 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 828 (as) ? newSVpvn(as,
829 alen) :
830 &PL_sv_undef);
831 }
832 else {
833 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
834 (int) llen, s);
835 return -1;
836 }
837 }
838 s = e;
839 }
840 }
841 }
842 return 0;
1141d9f8
NIS		 843}
844
dfebf958 845void
fcf2db38 846PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 847{
14a5cf38
JH		 848 PerlIO_funcs *tab = &PerlIO_perlio;
849 if (O_BINARY != O_TEXT) {
850 tab = &PerlIO_crlf;
851 }
852 else {
853 if (PerlIO_stdio.Set_ptrcnt) {
854 tab = &PerlIO_stdio;
855 }
dfebf958 856 }
14a5cf38 857 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 858 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 859 &PL_sv_undef);
dfebf958
NIS		 860}
861
e3f3bf95 862SV *
14a5cf38 863PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 864{
14a5cf38 865 return av->array[n].arg;
e3f3bf95
NIS		 866}
867
f3862f8b 868PerlIO_funcs *
14a5cf38 869PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 870{
14a5cf38
JH		 871 if (n >= 0 && n < av->cur) {
872 PerlIO_debug("Layer %" IVdf " is %s\n", n,
873 av->array[n].funcs->name);
874 return av->array[n].funcs;
875 }
876 if (!def)
877 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
878 return def;
e3f3bf95
NIS		 879}
880
fcf2db38 881PerlIO_list_t *
e3f3bf95
NIS		 882PerlIO_default_layers(pTHX)
883{
3a1ee7e8 884 if (!PL_def_layerlist) {
14a5cf38
JH		 885 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
886 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 887 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 888 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 889#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 890 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 891#if 0
14a5cf38 892 osLayer = &PerlIO_win32;
0c4128ad 893#endif
2f8118af 894#endif
14a5cf38
JH		 895 PerlIO_define_layer(aTHX_ & PerlIO_raw);
896 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
897 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
898 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 899#ifdef HAS_MMAP
14a5cf38 900 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 901#endif
14a5cf38
JH		 902 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
903 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 904 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 905 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
906 &PL_sv_undef);
907 if (s) {
3a1ee7e8 908 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 909 }
910 else {
3a1ee7e8 911 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 912 }
1141d9f8 913 }
3a1ee7e8
NIS		 914 if (PL_def_layerlist->cur < 2) {
915 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 916 }
3a1ee7e8 917 return PL_def_layerlist;
e3f3bf95
NIS		 918}
919
0c4f7ff0
NIS		 920void
921Perl_boot_core_PerlIO(pTHX)
922{
923#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 924 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
925 __FILE__);
0c4f7ff0 926#endif
14a5cf38 927 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 928}
e3f3bf95
NIS		 929
930PerlIO_funcs *
931PerlIO_default_layer(pTHX_ I32 n)
932{
14a5cf38
JH		 933 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
934 if (n < 0)
935 n += av->cur;
936 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 937}
938
a999f61b
NIS		 939#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
940#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 941
942void
1141d9f8 943PerlIO_stdstreams(pTHX)
60382766 944{
a1ea730d 945 if (!PL_perlio) {
14a5cf38
JH		 946 PerlIO_allocate(aTHX);
947 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
948 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
949 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
950 }
60382766
NIS		 951}
952
953PerlIO *
14a5cf38
JH		 954PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
955{
956 PerlIOl *l = NULL;
3a1ee7e8 957 Newc('L',l,tab->size,char,PerlIOl);
14a5cf38
JH		 958 if (l) {
959 Zero(l, tab->size, char);
960 l->next = *f;
961 l->tab = tab;
962 *f = l;
963 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
964 (mode) ? mode : "(Null)", arg);
965 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
966 PerlIO_pop(aTHX_ f);
967 return NULL;
968 }
969 }
970 return f;
60382766
NIS		 971}
972
dfebf958 973IV
e3f3bf95 974PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 975{
14a5cf38
JH		 976 dTHX;
977 PerlIO_pop(aTHX_ f);
978 if (*f) {
979 PerlIO_flush(f);
980 PerlIO_pop(aTHX_ f);
981 return 0;
982 }
983 return -1;
4b803d04
NIS		 984}
985
986IV
e3f3bf95 987PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 988{
14a5cf38 989 /*
71200d45 990 * Remove the dummy layer
14a5cf38
JH		 991 */
992 dTHX;
993 PerlIO_pop(aTHX_ f);
994 /*
71200d45 995 * Pop back to bottom layer
14a5cf38
JH		 996 */
997 if (f && *f) {
998 PerlIO_flush(f);
999 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1000 if (*PerlIONext(f)) {
1001 PerlIO_pop(aTHX_ f);
1002 }
1003 else {
1004 /*
71200d45 1005 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 1006 */
1007 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1008 PerlIO_pop(aTHX_ PerlIONext(f));
1009 }
1010 break;
1011 }
1012 }
1013 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1014 return 0;
1015 }
1016 return -1;
dfebf958
NIS		 1017}
1018
ac27b0f5 1019int
14a5cf38
JH		 1020PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1021 PerlIO_list_t *layers, IV n)
1022{
1023 IV max = layers->cur;
1024 int code = 0;
1025 while (n < max) {
1026 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1027 if (tab) {
1028 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1029 code = -1;
1030 break;
1031 }
1032 }
1033 n++;
1034 }
1035 return code;
e3f3bf95
NIS		 1036}
1037
1038int
ac27b0f5
NIS		 1039PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1040{
14a5cf38
JH		 1041 int code = 0;
1042 if (names) {
3a1ee7e8 1043 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1044 code = PerlIO_parse_layers(aTHX_ layers, names);
1045 if (code == 0) {
1046 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1047 }
3a1ee7e8 1048 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1049 }
14a5cf38 1050 return code;
ac27b0f5
NIS		 1051}
1052
f3862f8b 1053
60382766 1054/*--------------------------------------------------------------------------------------*/
14a5cf38 1055/*
71200d45 1056 * Given the abstraction above the public API functions
14a5cf38 1057 */
60382766
NIS		 1058
1059int
f5b9d040 1060PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1061{
14a5cf38
JH		 1062 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1063 f, PerlIOBase(f)->tab->name, iotype, mode,
1064 (names) ? names : "(Null)");
89aec743 1065 PerlIO_flush(f);
14a5cf38
JH		 1066 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1067 PerlIO *top = f;
1068 while (*top) {
1069 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 1070 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1071 break;
1072 }
1073 top = PerlIONext(top);
89aec743 1074 PerlIO_flush(top);
14a5cf38
JH		 1075 }
1076 }
1077 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 1078}
1079
1080#undef PerlIO__close
1081int
1082PerlIO__close(PerlIO *f)
1083{
14a5cf38
JH		 1084 if (f && *f)
1085 return (*PerlIOBase(f)->tab->Close) (f);
1086 else {
1087 SETERRNO(EBADF, SS$_IVCHAN);
1088 return -1;
1089 }
76ced9ad
NIS		 1090}
1091
b931b1d9
NIS		 1092#undef PerlIO_close
1093int
1094PerlIO_close(PerlIO *f)
1095{
14a5cf38
JH		 1096 dTHX;
1097 int code = -1;
1098 if (f && *f) {
1099 code = (*PerlIOBase(f)->tab->Close) (f);
1100 while (*f) {
1101 PerlIO_pop(aTHX_ f);
1102 }
f6c77cf1 1103 }
14a5cf38 1104 return code;
b931b1d9
NIS		 1105}
1106
1107#undef PerlIO_fileno
1108int
1109PerlIO_fileno(PerlIO *f)
1110{
14a5cf38
JH		 1111 if (f && *f)
1112 return (*PerlIOBase(f)->tab->Fileno) (f);
1113 else {
1114 SETERRNO(EBADF, SS$_IVCHAN);
1115 return -1;
1116 }
b931b1d9
NIS		 1117}
1118
1141d9f8
NIS		 1119static const char *
1120PerlIO_context_layers(pTHX_ const char *mode)
1121{
14a5cf38
JH		 1122 const char *type = NULL;
1123 /*
71200d45 1124 * Need to supply default layer info from open.pm
14a5cf38
JH		 1125 */
1126 if (PL_curcop) {
1127 SV *layers = PL_curcop->cop_io;
1128 if (layers) {
1129 STRLEN len;
1130 type = SvPV(layers, len);
1131 if (type && mode[0] != 'r') {
1132 /*
71200d45 1133 * Skip to write part
14a5cf38
JH		 1134 */
1135 const char *s = strchr(type, 0);
1136 if (s && (s - type) < len) {
1137 type = s + 1;
1138 }
1139 }
1140 }
1141 }
1142 return type;
1141d9f8
NIS		 1143}
1144
fcf2db38 1145static PerlIO_funcs *
2edd7e44
NIS		 1146PerlIO_layer_from_ref(pTHX_ SV *sv)
1147{
14a5cf38 1148 /*
71200d45 1149 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1150 */
1151 if (SvTYPE(sv) < SVt_PVAV)
1152 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1153
1154 /*
71200d45 1155 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1156 */
1157 switch (SvTYPE(sv)) {
1158 case SVt_PVAV:
1159 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1160 case SVt_PVHV:
1161 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1162 case SVt_PVCV:
1163 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1164 case SVt_PVGV:
1165 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1166 }
1167 return NULL;
2edd7e44
NIS		 1168}
1169
fcf2db38 1170PerlIO_list_t *
14a5cf38
JH		 1171PerlIO_resolve_layers(pTHX_ const char *layers,
1172 const char *mode, int narg, SV **args)
1173{
1174 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1175 int incdef = 1;
a1ea730d 1176 if (!PL_perlio)
14a5cf38
JH		 1177 PerlIO_stdstreams(aTHX);
1178 if (narg) {
1179 SV *arg = *args;
1180 /*
71200d45
NIS		 1181 * If it is a reference but not an object see if we have a handler
1182 * for it
14a5cf38
JH		 1183 */
1184 if (SvROK(arg) && !sv_isobject(arg)) {
1185 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1186 if (handler) {
3a1ee7e8
NIS		 1187 def = PerlIO_list_alloc(aTHX);
1188 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1189 incdef = 0;
1190 }
1191 /*
71200d45 1192 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1193 * something sensible else we will just stringfy and open
71200d45 1194 * resulting string.
14a5cf38
JH		 1195 */
1196 }
1197 }
1198 if (!layers)
1199 layers = PerlIO_context_layers(aTHX_ mode);
1200 if (layers && *layers) {
1201 PerlIO_list_t *av;
1202 if (incdef) {
1203 IV i = def->cur;
3a1ee7e8 1204 av = PerlIO_list_alloc(aTHX);
14a5cf38 1205 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1206 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1207 def->array[i].arg);
1208 }
1209 }
1210 else {
1211 av = def;
1212 }
1213 PerlIO_parse_layers(aTHX_ av, layers);
1214 return av;
1215 }
1216 else {
1217 if (incdef)
1218 def->refcnt++;
1219 return def;
1220 }
ee518936
NIS		 1221}
1222
1223PerlIO *
14a5cf38
JH		 1224PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1225 int imode, int perm, PerlIO *f, int narg, SV **args)
1226{
1227 if (!f && narg == 1 && *args == &PL_sv_undef) {
1228 if ((f = PerlIO_tmpfile())) {
1229 if (!layers)
1230 layers = PerlIO_context_layers(aTHX_ mode);
1231 if (layers && *layers)
1232 PerlIO_apply_layers(aTHX_ f, mode, layers);
1233 }
1234 }
1235 else {
1236 PerlIO_list_t *layera = NULL;
1237 IV n;
1238 PerlIO_funcs *tab = NULL;
1239 if (f && *f) {
1240 /*
71200d45
NIS		 1241 * This is "reopen" - it is not tested as perl does not use it
1242 * yet
14a5cf38
JH		 1243 */
1244 PerlIOl *l = *f;
3a1ee7e8 1245 layera = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1246 while (l) {
1247 SV *arg =
1248 (l->tab->Getarg) ? (*l->tab->
1249 Getarg) (&l) : &PL_sv_undef;
3a1ee7e8 1250 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1251 l = *PerlIONext(&l);
1252 }
1253 }
1254 else {
1255 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1256 }
1257 /*
71200d45 1258 * Start at "top" of layer stack
14a5cf38
JH		 1259 */
1260 n = layera->cur - 1;
1261 while (n >= 0) {
1262 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1263 if (t && t->Open) {
1264 tab = t;
1265 break;
1266 }
1267 n--;
1268 }
1269 if (tab) {
1270 /*
71200d45 1271 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1272 */
1273 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1274 tab->name, layers, mode, fd, imode, perm, f, narg,
1275 args);
1276 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1277 f, narg, args);
1278 if (f) {
1279 if (n + 1 < layera->cur) {
1280 /*
1281 * More layers above the one that we used to open -
71200d45 1282 * apply them now
14a5cf38
JH		 1283 */
1284 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1285 != 0) {
1286 f = NULL;
1287 }
1288 }
1289 }
1290 }
3a1ee7e8 1291 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1292 }
1293 return f;
ee518936 1294}
b931b1d9
NIS		 1295
1296
9e353e3b
NIS		 1297#undef PerlIO_fdopen
1298PerlIO *
1299PerlIO_fdopen(int fd, const char *mode)
1300{
14a5cf38
JH		 1301 dTHX;
1302 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1303}
1304
6f9d8c32
NIS		 1305#undef PerlIO_open
1306PerlIO *
1307PerlIO_open(const char *path, const char *mode)
1308{
14a5cf38
JH		 1309 dTHX;
1310 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1311 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1312}
1313
9e353e3b
NIS		 1314#undef PerlIO_reopen
1315PerlIO *
1316PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1317{
14a5cf38
JH		 1318 dTHX;
1319 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1320 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1321}
1322
9e353e3b
NIS		 1323#undef PerlIO_read
1324SSize_t
1325PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1326{
14a5cf38
JH		 1327 if (f && *f)
1328 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1329 else {
1330 SETERRNO(EBADF, SS$_IVCHAN);
1331 return -1;
1332 }
760ac839
LW		 1333}
1334
313ca112
NIS		 1335#undef PerlIO_unread
1336SSize_t
1337PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1338{
14a5cf38
JH		 1339 if (f && *f)
1340 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1341 else {
1342 SETERRNO(EBADF, SS$_IVCHAN);
1343 return -1;
1344 }
760ac839
LW		 1345}
1346
9e353e3b
NIS		 1347#undef PerlIO_write
1348SSize_t
1349PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1350{
14a5cf38
JH		 1351 if (f && *f)
1352 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1353 else {
1354 SETERRNO(EBADF, SS$_IVCHAN);
1355 return -1;
1356 }
760ac839
LW		 1357}
1358
9e353e3b 1359#undef PerlIO_seek
6f9d8c32 1360int
9e353e3b 1361PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1362{
14a5cf38
JH		 1363 if (f && *f)
1364 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1365 else {
1366 SETERRNO(EBADF, SS$_IVCHAN);
1367 return -1;
1368 }
760ac839
LW		 1369}
1370
9e353e3b
NIS		 1371#undef PerlIO_tell
1372Off_t
1373PerlIO_tell(PerlIO *f)
760ac839 1374{
14a5cf38
JH		 1375 if (f && *f)
1376 return (*PerlIOBase(f)->tab->Tell) (f);
1377 else {
1378 SETERRNO(EBADF, SS$_IVCHAN);
1379 return -1;
1380 }
760ac839
LW		 1381}
1382
9e353e3b 1383#undef PerlIO_flush
6f9d8c32 1384int
9e353e3b 1385PerlIO_flush(PerlIO *f)
760ac839 1386{
14a5cf38
JH		 1387 if (f) {
1388 if (*f) {
1389 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1390 if (tab && tab->Flush) {
1391 return (*tab->Flush) (f);
1392 }
1393 else {
1394 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1395 SETERRNO(EBADF, SS$_IVCHAN);
1396 return -1;
1397 }
1398 }
1399 else {
1400 PerlIO_debug("Cannot flush f=%p\n", f);
1401 SETERRNO(EBADF, SS$_IVCHAN);
1402 return -1;
1403 }
1404 }
1405 else {
1406 /*
1407 * Is it good API design to do flush-all on NULL, a potentially
1408 * errorneous input? Maybe some magical value (PerlIO*
1409 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1410 * things on fflush(NULL), but should we be bound by their design
71200d45 1411 * decisions? --jhi
14a5cf38 1412 */
a1ea730d
NIS		 1413 dTHX;
1414 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1415 int code = 0;
1416 while ((f = *table)) {
1417 int i;
1418 table = (PerlIO **) (f++);
1419 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1420 if (*f && PerlIO_flush(f) != 0)
1421 code = -1;
1422 f++;
1423 }
1424 }
1425 return code;
1426 }
760ac839
LW		 1427}
1428
a9c883f6
NIS		 1429void
1430PerlIOBase_flush_linebuf()
1431{
a1ea730d
NIS		 1432 dTHX;
1433 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1434 PerlIO *f;
1435 while ((f = *table)) {
1436 int i;
1437 table = (PerlIO **) (f++);
1438 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1439 if (*f
1440 && (PerlIOBase(f)->
1441 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1442 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1443 PerlIO_flush(f);
1444 f++;
1445 }
a9c883f6 1446 }
a9c883f6
NIS		 1447}
1448
06da4f11
NIS		 1449#undef PerlIO_fill
1450int
1451PerlIO_fill(PerlIO *f)
1452{
14a5cf38
JH		 1453 if (f && *f)
1454 return (*PerlIOBase(f)->tab->Fill) (f);
1455 else {
1456 SETERRNO(EBADF, SS$_IVCHAN);
1457 return -1;
1458 }
06da4f11
NIS		 1459}
1460
f3862f8b
NIS		 1461#undef PerlIO_isutf8
1462int
1463PerlIO_isutf8(PerlIO *f)
1464{
14a5cf38
JH		 1465 if (f && *f)
1466 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1467 else {
1468 SETERRNO(EBADF, SS$_IVCHAN);
1469 return -1;
1470 }
f3862f8b
NIS		 1471}
1472
9e353e3b 1473#undef PerlIO_eof
6f9d8c32 1474int
9e353e3b 1475PerlIO_eof(PerlIO *f)
760ac839 1476{
14a5cf38
JH		 1477 if (f && *f)
1478 return (*PerlIOBase(f)->tab->Eof) (f);
1479 else {
1480 SETERRNO(EBADF, SS$_IVCHAN);
1481 return -1;
1482 }
9e353e3b
NIS		 1483}
1484
1485#undef PerlIO_error
1486int
1487PerlIO_error(PerlIO *f)
1488{
14a5cf38
JH		 1489 if (f && *f)
1490 return (*PerlIOBase(f)->tab->Error) (f);
1491 else {
1492 SETERRNO(EBADF, SS$_IVCHAN);
1493 return -1;
1494 }
9e353e3b
NIS		 1495}
1496
1497#undef PerlIO_clearerr
1498void
1499PerlIO_clearerr(PerlIO *f)
1500{
14a5cf38
JH		 1501 if (f && *f)
1502 (*PerlIOBase(f)->tab->Clearerr) (f);
1503 else
1504 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1505}
1506
1507#undef PerlIO_setlinebuf
1508void
1509PerlIO_setlinebuf(PerlIO *f)
1510{
14a5cf38
JH		 1511 if (f && *f)
1512 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1513 else
1514 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1515}
1516
1517#undef PerlIO_has_base
1518int
1519PerlIO_has_base(PerlIO *f)
1520{
14a5cf38
JH		 1521 if (f && *f) {
1522 return (PerlIOBase(f)->tab->Get_base != NULL);
1523 }
1524 return 0;
760ac839
LW		 1525}
1526
9e353e3b
NIS		 1527#undef PerlIO_fast_gets
1528int
1529PerlIO_fast_gets(PerlIO *f)
760ac839 1530{
14a5cf38
JH		 1531 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1532 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1533 return (tab->Set_ptrcnt != NULL);
1534 }
1535 return 0;
9e353e3b
NIS		 1536}
1537
1538#undef PerlIO_has_cntptr
1539int
1540PerlIO_has_cntptr(PerlIO *f)
1541{
14a5cf38
JH		 1542 if (f && *f) {
1543 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1544 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1545 }
1546 return 0;
9e353e3b
NIS		 1547}
1548
1549#undef PerlIO_canset_cnt
1550int
1551PerlIO_canset_cnt(PerlIO *f)
1552{
14a5cf38
JH		 1553 if (f && *f) {
1554 PerlIOl *l = PerlIOBase(f);
1555 return (l->tab->Set_ptrcnt != NULL);
1556 }
1557 return 0;
760ac839
LW		 1558}
1559
1560#undef PerlIO_get_base
888911fc 1561STDCHAR *
a20bf0c3 1562PerlIO_get_base(PerlIO *f)
760ac839 1563{
14a5cf38
JH		 1564 if (f && *f)
1565 return (*PerlIOBase(f)->tab->Get_base) (f);
1566 return NULL;
9e353e3b
NIS		 1567}
1568
1569#undef PerlIO_get_bufsiz
1570int
1571PerlIO_get_bufsiz(PerlIO *f)
1572{
14a5cf38
JH		 1573 if (f && *f)
1574 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1575 return 0;
9e353e3b
NIS		 1576}
1577
1578#undef PerlIO_get_ptr
1579STDCHAR *
1580PerlIO_get_ptr(PerlIO *f)
1581{
14a5cf38
JH		 1582 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1583 if (tab->Get_ptr == NULL)
1584 return NULL;
1585 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1586}
1587
1588#undef PerlIO_get_cnt
05d1247b 1589int
9e353e3b
NIS		 1590PerlIO_get_cnt(PerlIO *f)
1591{
14a5cf38
JH		 1592 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1593 if (tab->Get_cnt == NULL)
1594 return 0;
1595 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1596}
1597
1598#undef PerlIO_set_cnt
1599void
14a5cf38 1600PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1601{
14a5cf38 1602 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1603}
1604
1605#undef PerlIO_set_ptrcnt
1606void
14a5cf38 1607PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1608{
14a5cf38
JH		 1609 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1610 if (tab->Set_ptrcnt == NULL) {
1611 dTHX;
1612 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1613 }
1614 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1615}
1616
1617/*--------------------------------------------------------------------------------------*/
14a5cf38 1618/*
71200d45 1619 * utf8 and raw dummy layers
14a5cf38 1620 */
dfebf958 1621
26fb694e 1622IV
e3f3bf95 1623PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1624{
14a5cf38
JH		 1625 if (PerlIONext(f)) {
1626 dTHX;
1627 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1628 PerlIO_pop(aTHX_ f);
1629 if (tab->kind & PERLIO_K_UTF8)
1630 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1631 else
1632 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1633 return 0;
1634 }
1635 return -1;
26fb694e
NIS		 1636}
1637
dfebf958 1638PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1639 "utf8",
1640 sizeof(PerlIOl),
1641 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1642 PerlIOUtf8_pushed,
1643 NULL,
1644 NULL,
1645 NULL,
1646 NULL,
1647 NULL,
1648 NULL,
1649 NULL,
1650 NULL,
1651 NULL,
1652 NULL,
1653 NULL, /* flush */
1654 NULL, /* fill */
1655 NULL,
1656 NULL,
1657 NULL,
1658 NULL,
1659 NULL, /* get_base */
1660 NULL, /* get_bufsiz */
1661 NULL, /* get_ptr */
1662 NULL, /* get_cnt */
1663 NULL, /* set_ptrcnt */
26fb694e
NIS		 1664};
1665
1666PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1667 "bytes",
1668 sizeof(PerlIOl),
1669 PERLIO_K_DUMMY,
1670 PerlIOUtf8_pushed,
1671 NULL,
1672 NULL,
1673 NULL,
1674 NULL,
1675 NULL,
1676 NULL,
1677 NULL,
1678 NULL,
1679 NULL,
1680 NULL,
1681 NULL, /* flush */
1682 NULL, /* fill */
1683 NULL,
1684 NULL,
1685 NULL,
1686 NULL,
1687 NULL, /* get_base */
1688 NULL, /* get_bufsiz */
1689 NULL, /* get_ptr */
1690 NULL, /* get_cnt */
1691 NULL, /* set_ptrcnt */
dfebf958
NIS		 1692};
1693
1694PerlIO *
14a5cf38
JH		 1695PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1696 IV n, const char *mode, int fd, int imode, int perm,
1697 PerlIO *old, int narg, SV **args)
dfebf958 1698{
14a5cf38
JH		 1699 PerlIO_funcs *tab = PerlIO_default_btm();
1700 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1701 old, narg, args);
dfebf958
NIS		 1702}
1703
1704PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1705 "raw",
1706 sizeof(PerlIOl),
1707 PERLIO_K_DUMMY,
1708 PerlIORaw_pushed,
1709 PerlIOBase_popped,
1710 PerlIORaw_open,
1711 NULL,
1712 NULL,
1713 NULL,
1714 NULL,
1715 NULL,
1716 NULL,
1717 NULL,
1718 NULL,
1719 NULL, /* flush */
1720 NULL, /* fill */
1721 NULL,
1722 NULL,
1723 NULL,
1724 NULL,
1725 NULL, /* get_base */
1726 NULL, /* get_bufsiz */
1727 NULL, /* get_ptr */
1728 NULL, /* get_cnt */
1729 NULL, /* set_ptrcnt */
dfebf958
NIS		 1730};
1731/*--------------------------------------------------------------------------------------*/
1732/*--------------------------------------------------------------------------------------*/
14a5cf38 1733/*
71200d45 1734 * "Methods" of the "base class"
14a5cf38 1735 */
9e353e3b
NIS		 1736
1737IV
1738PerlIOBase_fileno(PerlIO *f)
1739{
14a5cf38 1740 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1741}
1742
f5b9d040 1743char *
14a5cf38
JH		 1744PerlIO_modestr(PerlIO *f, char *buf)
1745{
1746 char *s = buf;
1747 IV flags = PerlIOBase(f)->flags;
1748 if (flags & PERLIO_F_APPEND) {
1749 *s++ = 'a';
1750 if (flags & PERLIO_F_CANREAD) {
1751 *s++ = '+';
1752 }
1753 }
1754 else if (flags & PERLIO_F_CANREAD) {
1755 *s++ = 'r';
1756 if (flags & PERLIO_F_CANWRITE)
1757 *s++ = '+';
1758 }
1759 else if (flags & PERLIO_F_CANWRITE) {
1760 *s++ = 'w';
1761 if (flags & PERLIO_F_CANREAD) {
1762 *s++ = '+';
1763 }
1764 }
5f1a76d0 1765#if O_TEXT != O_BINARY
14a5cf38
JH		 1766 if (!(flags & PERLIO_F_CRLF))
1767 *s++ = 'b';
5f1a76d0 1768#endif
14a5cf38
JH		 1769 *s = '\0';
1770 return buf;
f5b9d040
NIS		 1771}
1772
76ced9ad 1773IV
e3f3bf95 1774PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1775{
14a5cf38 1776 PerlIOl *l = PerlIOBase(f);
b7953727 1777#if 0
14a5cf38
JH		 1778 const char *omode = mode;
1779 char temp[8];
b7953727 1780#endif
14a5cf38
JH		 1781 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1782 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1783 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1784 if (tab->Set_ptrcnt != NULL)
1785 l->flags |= PERLIO_F_FASTGETS;
1786 if (mode) {
1787 if (*mode == '#' || *mode == 'I')
1788 mode++;
1789 switch (*mode++) {
1790 case 'r':
1791 l->flags |= PERLIO_F_CANREAD;
1792 break;
1793 case 'a':
1794 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1795 break;
1796 case 'w':
1797 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1798 break;
1799 default:
1800 SETERRNO(EINVAL, LIB$_INVARG);
1801 return -1;
1802 }
1803 while (*mode) {
1804 switch (*mode++) {
1805 case '+':
1806 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1807 break;
1808 case 'b':
1809 l->flags &= ~PERLIO_F_CRLF;
1810 break;
1811 case 't':
1812 l->flags |= PERLIO_F_CRLF;
1813 break;
1814 default:
1815 SETERRNO(EINVAL, LIB$_INVARG);
1816 return -1;
1817 }
1818 }
1819 }
1820 else {
1821 if (l->next) {
1822 l->flags |= l->next->flags &
1823 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1824 PERLIO_F_APPEND);
1825 }
1826 }
5e2ab84b 1827#if 0
14a5cf38
JH		 1828 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1829 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1830 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1831#endif
14a5cf38 1832 return 0;
76ced9ad
NIS		 1833}
1834
1835IV
1836PerlIOBase_popped(PerlIO *f)
1837{
14a5cf38 1838 return 0;
760ac839
LW		 1839}
1840
9e353e3b
NIS		 1841SSize_t
1842PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1843{
14a5cf38
JH		 1844 dTHX;
1845 /*
71200d45 1846 * Save the position as current head considers it
14a5cf38
JH		 1847 */
1848 Off_t old = PerlIO_tell(f);
1849 SSize_t done;
1850 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1851 PerlIOSelf(f, PerlIOBuf)->posn = old;
1852 done = PerlIOBuf_unread(f, vbuf, count);
1853 return done;
9e353e3b
NIS		 1854}
1855
f6c77cf1
NIS		 1856SSize_t
1857PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1858{
14a5cf38
JH		 1859 STDCHAR *buf = (STDCHAR *) vbuf;
1860 if (f) {
1861 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1862 return 0;
1863 while (count > 0) {
1864 SSize_t avail = PerlIO_get_cnt(f);
1865 SSize_t take = 0;
1866 if (avail > 0)
1867 take = (count < avail) ? count : avail;
1868 if (take > 0) {
1869 STDCHAR *ptr = PerlIO_get_ptr(f);
1870 Copy(ptr, buf, take, STDCHAR);
1871 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1872 count -= take;
1873 buf += take;
1874 }
1875 if (count > 0 && avail <= 0) {
1876 if (PerlIO_fill(f) != 0)
1877 break;
1878 }
1879 }
1880 return (buf - (STDCHAR *) vbuf);
1881 }
f6c77cf1 1882 return 0;
f6c77cf1
NIS		 1883}
1884
9e353e3b 1885IV
06da4f11 1886PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1887{
14a5cf38 1888 return 0;
9e353e3b
NIS		 1889}
1890
1891IV
06da4f11
NIS		 1892PerlIOBase_noop_fail(PerlIO *f)
1893{
14a5cf38 1894 return -1;
06da4f11
NIS		 1895}
1896
1897IV
9e353e3b
NIS		 1898PerlIOBase_close(PerlIO *f)
1899{
14a5cf38
JH		 1900 IV code = 0;
1901 PerlIO *n = PerlIONext(f);
1902 if (PerlIO_flush(f) != 0)
1903 code = -1;
1904 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1905 code = -1;
1906 PerlIOBase(f)->flags &=
1907 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1908 return code;
9e353e3b
NIS		 1909}
1910
1911IV
1912PerlIOBase_eof(PerlIO *f)
1913{
14a5cf38
JH		 1914 if (f && *f) {
1915 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1916 }
1917 return 1;
9e353e3b
NIS		 1918}
1919
1920IV
1921PerlIOBase_error(PerlIO *f)
1922{
14a5cf38
JH		 1923 if (f && *f) {
1924 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1925 }
1926 return 1;
9e353e3b
NIS		 1927}
1928
1929void
1930PerlIOBase_clearerr(PerlIO *f)
1931{
14a5cf38
JH		 1932 if (f && *f) {
1933 PerlIO *n = PerlIONext(f);
1934 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1935 if (n)
1936 PerlIO_clearerr(n);
1937 }
9e353e3b
NIS		 1938}
1939
1940void
1941PerlIOBase_setlinebuf(PerlIO *f)
1942{
14a5cf38
JH		 1943 if (f) {
1944 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1945 }
9e353e3b
NIS		 1946}
1947
9e353e3b 1948/*--------------------------------------------------------------------------------------*/
14a5cf38 1949/*
71200d45 1950 * Bottom-most level for UNIX-like case
14a5cf38 1951 */
9e353e3b 1952
14a5cf38
JH		 1953typedef struct {
1954 struct _PerlIO base; /* The generic part */
1955 int fd; /* UNIX like file descriptor */
1956 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 1957} PerlIOUnix;
1958
6f9d8c32 1959int
9e353e3b 1960PerlIOUnix_oflags(const char *mode)
760ac839 1961{
14a5cf38
JH		 1962 int oflags = -1;
1963 if (*mode == 'I' || *mode == '#')
1964 mode++;
1965 switch (*mode) {
1966 case 'r':
1967 oflags = O_RDONLY;
1968 if (*++mode == '+') {
1969 oflags = O_RDWR;
1970 mode++;
1971 }
1972 break;
1973
1974 case 'w':
1975 oflags = O_CREAT | O_TRUNC;
1976 if (*++mode == '+') {
1977 oflags |= O_RDWR;
1978 mode++;
1979 }
1980 else
1981 oflags |= O_WRONLY;
1982 break;
1983
1984 case 'a':
1985 oflags = O_CREAT | O_APPEND;
1986 if (*++mode == '+') {
1987 oflags |= O_RDWR;
1988 mode++;
1989 }
1990 else
1991 oflags |= O_WRONLY;
1992 break;
1993 }
1994 if (*mode == 'b') {
1995 oflags |= O_BINARY;
1996 oflags &= ~O_TEXT;
1997 mode++;
1998 }
1999 else if (*mode == 't') {
2000 oflags |= O_TEXT;
2001 oflags &= ~O_BINARY;
2002 mode++;
2003 }
2004 /*
71200d45 2005 * Always open in binary mode
14a5cf38
JH		 2006 */
2007 oflags |= O_BINARY;
2008 if (*mode || oflags == -1) {
2009 SETERRNO(EINVAL, LIB$_INVARG);
2010 oflags = -1;
2011 }
2012 return oflags;
9e353e3b
NIS		 2013}
2014
2015IV
2016PerlIOUnix_fileno(PerlIO *f)
2017{
14a5cf38 2018 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2019}
2020
4b803d04 2021IV
e3f3bf95 2022PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2023{
14a5cf38
JH		 2024 IV code = PerlIOBase_pushed(f, mode, arg);
2025 if (*PerlIONext(f)) {
2026 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2027 s->fd = PerlIO_fileno(PerlIONext(f));
2028 /*
71200d45 2029 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2030 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2031 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2032 */
2033 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2034 }
2035 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2036 return code;
4b803d04
NIS		 2037}
2038
9e353e3b 2039PerlIO *
14a5cf38
JH		 2040PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2041 IV n, const char *mode, int fd, int imode,
2042 int perm, PerlIO *f, int narg, SV **args)
2043{
2044 if (f) {
2045 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2046 (*PerlIOBase(f)->tab->Close) (f);
2047 }
2048 if (narg > 0) {
2049 char *path = SvPV_nolen(*args);
2050 if (*mode == '#')
2051 mode++;
2052 else {
2053 imode = PerlIOUnix_oflags(mode);
2054 perm = 0666;
2055 }
2056 if (imode != -1) {
2057 fd = PerlLIO_open3(path, imode, perm);
2058 }
2059 }
2060 if (fd >= 0) {
2061 PerlIOUnix *s;
2062 if (*mode == 'I')
2063 mode++;
2064 if (!f) {
2065 f = PerlIO_allocate(aTHX);
2066 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2067 PerlIOUnix);
2068 }
2069 else
2070 s = PerlIOSelf(f, PerlIOUnix);
2071 s->fd = fd;
2072 s->oflags = imode;
2073 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2074 return f;
2075 }
2076 else {
2077 if (f) {
2078 /*
71200d45 2079 * FIXME: pop layers ???
14a5cf38
JH		 2080 */
2081 }
2082 return NULL;
2083 }
9e353e3b
NIS		 2084}
2085
8cf8f3d1
NIS		 2086SV *
2087PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
71200d45 2088{
8cf8f3d1
NIS		 2089 if (!arg)
2090 return Nullsv;
71200d45 2091#ifdef sv_dup
8cf8f3d1
NIS		 2092 if (param) {
2093 return sv_dup(arg, param);
2094 }
2095 else {
2096 return newSVsv(arg);
2097 }
2098#else
2099 return newSVsv(arg);
71200d45 2100#endif
8cf8f3d1
NIS		 2101}
2102
2103PerlIO *
2104PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2105{
2106 PerlIO *nexto = PerlIONext(o);
2107 if (*nexto) {
2108 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2109 f = (*tab->Dup)(aTHX_ f, nexto, param);
71200d45 2110 }
8cf8f3d1
NIS		 2111 if (f) {
2112 PerlIO_funcs *self = PerlIOBase(o)->tab;
2113 SV *arg = Nullsv;
2114 char buf[8];
b77c74bc 2115 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
8cf8f3d1
NIS		 2116 if (self->Getarg) {
2117 arg = (*self->Getarg)(o);
2118 if (arg) {
2119 arg = PerlIO_sv_dup(aTHX_ arg, param);
2120 }
2121 }
2122 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2123 if (!f && arg) {
2124 SvREFCNT_dec(arg);
2125 }
71200d45 2126 }
71200d45
NIS		 2127 return f;
2128}
2129
2130PerlIO *
8cf8f3d1 2131PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2132{
2133 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2134 int fd = PerlLIO_dup(os->fd);
2135 if (fd >= 0) {
2136 f = PerlIOBase_dup(aTHX_ f, o, param);
2137 if (f) {
2138 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2139 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2140 s->fd = fd;
2141 return f;
2142 }
2143 else {
2144 PerlLIO_close(fd);
2145 }
2146 }
2147 return NULL;
2148}
2149
2150
9e353e3b
NIS		 2151SSize_t
2152PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2153{
14a5cf38
JH		 2154 dTHX;
2155 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2156 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2157 return 0;
2158 while (1) {
2159 SSize_t len = PerlLIO_read(fd, vbuf, count);
2160 if (len >= 0 || errno != EINTR) {
2161 if (len < 0)
2162 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2163 else if (len == 0 && count != 0)
2164 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2165 return len;
2166 }
2167 PERL_ASYNC_CHECK();
2168 }
9e353e3b
NIS		 2169}
2170
2171SSize_t
2172PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2173{
14a5cf38
JH		 2174 dTHX;
2175 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2176 while (1) {
2177 SSize_t len = PerlLIO_write(fd, vbuf, count);
2178 if (len >= 0 || errno != EINTR) {
2179 if (len < 0)
2180 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2181 return len;
2182 }
2183 PERL_ASYNC_CHECK();
06da4f11 2184 }
9e353e3b
NIS		 2185}
2186
2187IV
2188PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2189{
14a5cf38
JH		 2190 dSYS;
2191 Off_t new =
2192 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2193 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2194 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2195}
2196
2197Off_t
2198PerlIOUnix_tell(PerlIO *f)
2199{
14a5cf38
JH		 2200 dSYS;
2201 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2202}
2203
71200d45 2204
9e353e3b
NIS		 2205IV
2206PerlIOUnix_close(PerlIO *f)
2207{
14a5cf38
JH		 2208 dTHX;
2209 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2210 int code = 0;
2211 while (PerlLIO_close(fd) != 0) {
2212 if (errno != EINTR) {
2213 code = -1;
2214 break;
2215 }
2216 PERL_ASYNC_CHECK();
2217 }
2218 if (code == 0) {
2219 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2220 }
2221 return code;
9e353e3b
NIS		 2222}
2223
2224PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2225 "unix",
2226 sizeof(PerlIOUnix),
2227 PERLIO_K_RAW,
2228 PerlIOUnix_pushed,
2229 PerlIOBase_noop_ok,
2230 PerlIOUnix_open,
2231 NULL,
2232 PerlIOUnix_fileno,
71200d45 2233 PerlIOUnix_dup,
14a5cf38
JH		 2234 PerlIOUnix_read,
2235 PerlIOBase_unread,
2236 PerlIOUnix_write,
2237 PerlIOUnix_seek,
2238 PerlIOUnix_tell,
2239 PerlIOUnix_close,
2240 PerlIOBase_noop_ok, /* flush */
2241 PerlIOBase_noop_fail, /* fill */
2242 PerlIOBase_eof,
2243 PerlIOBase_error,
2244 PerlIOBase_clearerr,
2245 PerlIOBase_setlinebuf,
2246 NULL, /* get_base */
2247 NULL, /* get_bufsiz */
2248 NULL, /* get_ptr */
2249 NULL, /* get_cnt */
2250 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2251};
2252
2253/*--------------------------------------------------------------------------------------*/
14a5cf38 2254/*
71200d45 2255 * stdio as a layer
14a5cf38 2256 */
9e353e3b 2257
14a5cf38
JH		 2258typedef struct {
2259 struct _PerlIO base;
2260 FILE *stdio; /* The stream */
9e353e3b
NIS		 2261} PerlIOStdio;
2262
2263IV
2264PerlIOStdio_fileno(PerlIO *f)
2265{
14a5cf38
JH		 2266 dSYS;
2267 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2268}
2269
766a733e 2270char *
14a5cf38
JH		 2271PerlIOStdio_mode(const char *mode, char *tmode)
2272{
2273 char *ret = tmode;
2274 while (*mode) {
2275 *tmode++ = *mode++;
2276 }
2277 if (O_BINARY != O_TEXT) {
2278 *tmode++ = 'b';
2279 }
2280 *tmode = '\0';
2281 return ret;
2282}
2283
2284/*
71200d45 2285 * This isn't used yet ...
14a5cf38 2286 */
4b803d04 2287IV
e3f3bf95 2288PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2289{
14a5cf38
JH		 2290 if (*PerlIONext(f)) {
2291 dSYS;
2292 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2293 char tmode[8];
2294 FILE *stdio =
2295 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2296 PerlIOStdio_mode(mode, tmode));
2297 if (stdio)
2298 s->stdio = stdio;
2299 else
2300 return -1;
2301 }
2302 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2303}
2304
9e353e3b
NIS		 2305#undef PerlIO_importFILE
2306PerlIO *
2307PerlIO_importFILE(FILE *stdio, int fl)
2308{
14a5cf38
JH		 2309 dTHX;
2310 PerlIO *f = NULL;
2311 if (stdio) {
2312 PerlIOStdio *s =
2313 PerlIOSelf(PerlIO_push
2314 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2315 "r+", Nullsv), PerlIOStdio);
2316 s->stdio = stdio;
2317 }
2318 return f;
9e353e3b
NIS		 2319}
2320
2321PerlIO *
14a5cf38
JH		 2322PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2323 IV n, const char *mode, int fd, int imode,
2324 int perm, PerlIO *f, int narg, SV **args)
2325{
2326 char tmode[8];
2327 if (f) {
2328 char *path = SvPV_nolen(*args);
2329 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2330 FILE *stdio =
2331 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2332 s->stdio);
2333 if (!s->stdio)
2334 return NULL;
2335 s->stdio = stdio;
2336 return f;
2337 }
2338 else {
2339 if (narg > 0) {
2340 char *path = SvPV_nolen(*args);
2341 if (*mode == '#') {
2342 mode++;
2343 fd = PerlLIO_open3(path, imode, perm);
2344 }
2345 else {
2346 FILE *stdio = PerlSIO_fopen(path, mode);
2347 if (stdio) {
2348 PerlIOStdio *s =
2349 PerlIOSelf(PerlIO_push
2350 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2351 (mode = PerlIOStdio_mode(mode, tmode)),
2352 PerlIOArg),
2353 PerlIOStdio);
2354 s->stdio = stdio;
2355 }
2356 return f;
2357 }
2358 }
2359 if (fd >= 0) {
2360 FILE *stdio = NULL;
2361 int init = 0;
2362 if (*mode == 'I') {
2363 init = 1;
2364 mode++;
2365 }
2366 if (init) {
2367 switch (fd) {
2368 case 0:
2369 stdio = PerlSIO_stdin;
2370 break;
2371 case 1:
2372 stdio = PerlSIO_stdout;
2373 break;
2374 case 2:
2375 stdio = PerlSIO_stderr;
2376 break;
2377 }
2378 }
2379 else {
2380 stdio = PerlSIO_fdopen(fd, mode =
2381 PerlIOStdio_mode(mode, tmode));
2382 }
2383 if (stdio) {
2384 PerlIOStdio *s =
2385 PerlIOSelf(PerlIO_push
2386 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2387 mode, PerlIOArg), PerlIOStdio);
2388 s->stdio = stdio;
2389 return f;
2390 }
2391 }
2392 }
ee518936 2393 return NULL;
9e353e3b
NIS		 2394}
2395
2396SSize_t
2397PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2398{
14a5cf38
JH		 2399 dSYS;
2400 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2401 SSize_t got = 0;
2402 if (count == 1) {
2403 STDCHAR *buf = (STDCHAR *) vbuf;
2404 /*
2405 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2406 * stdio does not do that for fread()
14a5cf38
JH		 2407 */
2408 int ch = PerlSIO_fgetc(s);
2409 if (ch != EOF) {
2410 *buf = ch;
2411 got = 1;
2412 }
2413 }
2414 else
2415 got = PerlSIO_fread(vbuf, 1, count, s);
2416 return got;
9e353e3b
NIS		 2417}
2418
2419SSize_t
2420PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2421{
14a5cf38
JH		 2422 dSYS;
2423 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2424 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2425 SSize_t unread = 0;
2426 while (count > 0) {
2427 int ch = *buf-- & 0xff;
2428 if (PerlSIO_ungetc(ch, s) != ch)
2429 break;
2430 unread++;
2431 count--;
2432 }
2433 return unread;
9e353e3b
NIS		 2434}
2435
2436SSize_t
2437PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2438{
14a5cf38
JH		 2439 dSYS;
2440 return PerlSIO_fwrite(vbuf, 1, count,
2441 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2442}
2443
2444IV
2445PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2446{
14a5cf38
JH		 2447 dSYS;
2448 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2449 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2450}
2451
2452Off_t
2453PerlIOStdio_tell(PerlIO *f)
2454{
14a5cf38
JH		 2455 dSYS;
2456 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2457 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2458}
2459
2460IV
2461PerlIOStdio_close(PerlIO *f)
2462{
14a5cf38 2463 dSYS;
af130d45 2464#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2465 int optval;
2466 Sock_size_t optlen = sizeof(int);
8e4bc33b 2467#endif
14a5cf38
JH		 2468 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2469 return (
af130d45 2470#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2471 (getsockopt
2472 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2473 &optlen) <
2474 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2475#else
14a5cf38 2476 PerlSIO_fclose(stdio)
8e4bc33b 2477#endif
14a5cf38 2478 );
8e4bc33b 2479
9e353e3b
NIS		 2480}
2481
2482IV
2483PerlIOStdio_flush(PerlIO *f)
2484{
14a5cf38
JH		 2485 dSYS;
2486 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2487 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2488 return PerlSIO_fflush(stdio);
2489 }
2490 else {
88b61e10 2491#if 0
14a5cf38
JH		 2492 /*
2493 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2494 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2495 * design is to do _this_ but not have layer above flush this
71200d45 2496 * layer read-to-read
14a5cf38
JH		 2497 */
2498 /*
71200d45 2499 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2500 */
2501 int err = errno;
2502 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2503 errno = err;
88b61e10 2504#endif
14a5cf38
JH		 2505 }
2506 return 0;
9e353e3b
NIS		 2507}
2508
2509IV
06da4f11
NIS		 2510PerlIOStdio_fill(PerlIO *f)
2511{
14a5cf38
JH		 2512 dSYS;
2513 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2514 int c;
2515 /*
71200d45 2516 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2517 */
2518 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2519 if (PerlSIO_fflush(stdio) != 0)
2520 return EOF;
2521 }
2522 c = PerlSIO_fgetc(stdio);
2523 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2524 return EOF;
2525 return 0;
06da4f11
NIS		 2526}
2527
2528IV
9e353e3b
NIS		 2529PerlIOStdio_eof(PerlIO *f)
2530{
14a5cf38
JH		 2531 dSYS;
2532 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2533}
2534
2535IV
2536PerlIOStdio_error(PerlIO *f)
2537{
14a5cf38
JH		 2538 dSYS;
2539 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2540}
2541
2542void
2543PerlIOStdio_clearerr(PerlIO *f)
2544{
14a5cf38
JH		 2545 dSYS;
2546 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2547}
2548
2549void
2550PerlIOStdio_setlinebuf(PerlIO *f)
2551{
14a5cf38 2552 dSYS;
9e353e3b 2553#ifdef HAS_SETLINEBUF
14a5cf38 2554 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2555#else
14a5cf38 2556 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2557#endif
2558}
2559
2560#ifdef FILE_base
2561STDCHAR *
2562PerlIOStdio_get_base(PerlIO *f)
2563{
14a5cf38
JH		 2564 dSYS;
2565 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2566 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2567}
2568
2569Size_t
2570PerlIOStdio_get_bufsiz(PerlIO *f)
2571{
14a5cf38
JH		 2572 dSYS;
2573 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2574 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2575}
2576#endif
2577
2578#ifdef USE_STDIO_PTR
2579STDCHAR *
2580PerlIOStdio_get_ptr(PerlIO *f)
2581{
14a5cf38
JH		 2582 dSYS;
2583 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2584 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2585}
2586
2587SSize_t
2588PerlIOStdio_get_cnt(PerlIO *f)
2589{
14a5cf38
JH		 2590 dSYS;
2591 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2592 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2593}
2594
2595void
14a5cf38 2596PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2597{
14a5cf38
JH		 2598 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2599 dSYS;
2600 if (ptr != NULL) {
9e353e3b 2601#ifdef STDIO_PTR_LVALUE
14a5cf38 2602 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2603#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2604 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2605 dTHX;
2606 assert(PerlSIO_get_cnt(stdio) == (cnt));
2607 }
9e353e3b
NIS		 2608#endif
2609#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2610 /*
71200d45 2611 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2612 */
2613 return;
9e353e3b 2614#endif
14a5cf38
JH		 2615#else /* STDIO_PTR_LVALUE */
2616 PerlProc_abort();
2617#endif /* STDIO_PTR_LVALUE */
2618 }
2619 /*
71200d45 2620 * Now (or only) set cnt
14a5cf38 2621 */
9e353e3b 2622#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2623 PerlSIO_set_cnt(stdio, cnt);
2624#else /* STDIO_CNT_LVALUE */
9e353e3b 2625#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2626 PerlSIO_set_ptr(stdio,
2627 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2628 cnt));
2629#else /* STDIO_PTR_LVAL_SETS_CNT */
2630 PerlProc_abort();
2631#endif /* STDIO_PTR_LVAL_SETS_CNT */
2632#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2633}
2634
2635#endif
2636
71200d45 2637PerlIO *
8cf8f3d1 2638PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 2639{
b77c74bc
NIS		 2640 /* This assumes no layers underneath - which is what
2641 happens, but is not how I remember it. NI-S 2001/10/16
2642 */
2643 int fd = PerlLIO_dup(PerlIO_fileno(o));
2644 if (fd >= 0) {
2645 char buf[8];
2646 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2647 if (stdio) {
2648 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2649 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2650 }
2651 else {
2652 PerlSIO_fclose(stdio);
2653 }
2654 }
2655 else {
2656 PerlLIO_close(fd);
2657 f = NULL;
2658 }
2659 }
2660 return f;
71200d45
NIS		 2661}
2662
9e353e3b 2663PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2664 "stdio",
2665 sizeof(PerlIOStdio),
2666 PERLIO_K_BUFFERED,
2667 PerlIOBase_pushed,
2668 PerlIOBase_noop_ok,
2669 PerlIOStdio_open,
2670 NULL,
2671 PerlIOStdio_fileno,
71200d45 2672 PerlIOStdio_dup,
14a5cf38
JH		 2673 PerlIOStdio_read,
2674 PerlIOStdio_unread,
2675 PerlIOStdio_write,
2676 PerlIOStdio_seek,
2677 PerlIOStdio_tell,
2678 PerlIOStdio_close,
2679 PerlIOStdio_flush,
2680 PerlIOStdio_fill,
2681 PerlIOStdio_eof,
2682 PerlIOStdio_error,
2683 PerlIOStdio_clearerr,
2684 PerlIOStdio_setlinebuf,
9e353e3b 2685#ifdef FILE_base
14a5cf38
JH		 2686 PerlIOStdio_get_base,
2687 PerlIOStdio_get_bufsiz,
9e353e3b 2688#else
14a5cf38
JH		 2689 NULL,
2690 NULL,
9e353e3b
NIS		 2691#endif
2692#ifdef USE_STDIO_PTR
14a5cf38
JH		 2693 PerlIOStdio_get_ptr,
2694 PerlIOStdio_get_cnt,
0eb1d8a4 2695#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2696 PerlIOStdio_set_ptrcnt
2697#else /* STDIO_PTR_LVALUE */
2698 NULL
2699#endif /* STDIO_PTR_LVALUE */
2700#else /* USE_STDIO_PTR */
2701 NULL,
2702 NULL,
2703 NULL
2704#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2705};
2706
2707#undef PerlIO_exportFILE
2708FILE *
2709PerlIO_exportFILE(PerlIO *f, int fl)
2710{
14a5cf38
JH		 2711 FILE *stdio;
2712 PerlIO_flush(f);
2713 stdio = fdopen(PerlIO_fileno(f), "r+");
2714 if (stdio) {
2715 dTHX;
2716 PerlIOStdio *s =
2717 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2718 PerlIOStdio);
2719 s->stdio = stdio;
2720 }
2721 return stdio;
9e353e3b
NIS		 2722}
2723
2724#undef PerlIO_findFILE
2725FILE *
2726PerlIO_findFILE(PerlIO *f)
2727{
14a5cf38
JH		 2728 PerlIOl *l = *f;
2729 while (l) {
2730 if (l->tab == &PerlIO_stdio) {
2731 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2732 return s->stdio;
2733 }
2734 l = *PerlIONext(&l);
f7e7eb72 2735 }
14a5cf38 2736 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2737}
2738
2739#undef PerlIO_releaseFILE
2740void
2741PerlIO_releaseFILE(PerlIO *p, FILE *f)
2742{
2743}
2744
2745/*--------------------------------------------------------------------------------------*/
14a5cf38 2746/*
71200d45 2747 * perlio buffer layer
14a5cf38 2748 */
9e353e3b 2749
5e2ab84b 2750IV
e3f3bf95 2751PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2752{
14a5cf38
JH		 2753 dSYS;
2754 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2755 int fd = PerlIO_fileno(f);
2756 Off_t posn;
2757 if (fd >= 0 && PerlLIO_isatty(fd)) {
2758 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2759 }
2760 posn = PerlIO_tell(PerlIONext(f));
2761 if (posn != (Off_t) - 1) {
2762 b->posn = posn;
2763 }
2764 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2765}
2766
9e353e3b 2767PerlIO *
14a5cf38
JH		 2768PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2769 IV n, const char *mode, int fd, int imode, int perm,
2770 PerlIO *f, int narg, SV **args)
2771{
2772 if (f) {
2773 PerlIO *next = PerlIONext(f);
2774 PerlIO_funcs *tab =
2775 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2776 next =
2777 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2778 next, narg, args);
2779 if (!next
2780 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2781 return NULL;
2782 }
2783 }
2784 else {
2785 PerlIO_funcs *tab =
2786 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2787 int init = 0;
2788 if (*mode == 'I') {
2789 init = 1;
2790 /*
71200d45 2791 * mode++;
14a5cf38
JH		 2792 */
2793 }
2794 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2795 NULL, narg, args);
2796 if (f) {
2797 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2798 fd = PerlIO_fileno(f);
ee518936 2799#if O_BINARY != O_TEXT
14a5cf38 2800 /*
71200d45 2801 * do something about failing setmode()? --jhi
14a5cf38
JH		 2802 */
2803 PerlLIO_setmode(fd, O_BINARY);
ee518936 2804#endif
14a5cf38
JH		 2805 if (init && fd == 2) {
2806 /*
71200d45 2807 * Initial stderr is unbuffered
14a5cf38
JH		 2808 */
2809 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2810 }
2811 }
ee518936 2812 }
14a5cf38 2813 return f;
9e353e3b
NIS		 2814}
2815
14a5cf38
JH		 2816/*
2817 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2818 * read or write state
14a5cf38 2819 */
9e353e3b
NIS		 2820IV
2821PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2822{
14a5cf38
JH		 2823 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2824 int code = 0;
2825 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2826 /*
71200d45 2827 * write() the buffer
14a5cf38
JH		 2828 */
2829 STDCHAR *buf = b->buf;
2830 STDCHAR *p = buf;
2831 PerlIO *n = PerlIONext(f);
2832 while (p < b->ptr) {
2833 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2834 if (count > 0) {
2835 p += count;
2836 }
2837 else if (count < 0 || PerlIO_error(n)) {
2838 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2839 code = -1;
2840 break;
2841 }
2842 }
2843 b->posn += (p - buf);
2844 }
2845 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2846 STDCHAR *buf = PerlIO_get_base(f);
2847 /*
71200d45 2848 * Note position change
14a5cf38
JH		 2849 */
2850 b->posn += (b->ptr - buf);
2851 if (b->ptr < b->end) {
2852 /*
71200d45 2853 * We did not consume all of it
14a5cf38
JH		 2854 */
2855 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2856 b->posn = PerlIO_tell(PerlIONext(f));
2857 }
2858 }
2859 }
2860 b->ptr = b->end = b->buf;
2861 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2862 /*
71200d45 2863 * FIXME: Is this right for read case ?
14a5cf38
JH		 2864 */
2865 if (PerlIO_flush(PerlIONext(f)) != 0)
2866 code = -1;
2867 return code;
6f9d8c32
NIS		 2868}
2869
06da4f11
NIS		 2870IV
2871PerlIOBuf_fill(PerlIO *f)
2872{
14a5cf38
JH		 2873 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2874 PerlIO *n = PerlIONext(f);
2875 SSize_t avail;
2876 /*
2877 * FIXME: doing the down-stream flush is a bad idea if it causes
2878 * pre-read data in stdio buffer to be discarded but this is too
2879 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2880 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2881 */
2882 if (PerlIO_flush(f) != 0)
2883 return -1;
2884 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2885 PerlIOBase_flush_linebuf();
2886
2887 if (!b->buf)
2888 PerlIO_get_base(f); /* allocate via vtable */
2889
2890 b->ptr = b->end = b->buf;
2891 if (PerlIO_fast_gets(n)) {
2892 /*
2893 * Layer below is also buffered We do _NOT_ want to call its
2894 * ->Read() because that will loop till it gets what we asked for
2895 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2896 * hand, or ask it to fill _once_.
14a5cf38
JH		 2897 */
2898 avail = PerlIO_get_cnt(n);
2899 if (avail <= 0) {
2900 avail = PerlIO_fill(n);
2901 if (avail == 0)
2902 avail = PerlIO_get_cnt(n);
2903 else {
2904 if (!PerlIO_error(n) && PerlIO_eof(n))
2905 avail = 0;
2906 }
2907 }
2908 if (avail > 0) {
2909 STDCHAR *ptr = PerlIO_get_ptr(n);
2910 SSize_t cnt = avail;
2911 if (avail > b->bufsiz)
2912 avail = b->bufsiz;
2913 Copy(ptr, b->buf, avail, STDCHAR);
2914 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2915 }
2916 }
2917 else {
2918 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2919 }
2920 if (avail <= 0) {
2921 if (avail == 0)
2922 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2923 else
2924 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2925 return -1;
2926 }
2927 b->end = b->buf + avail;
2928 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2929 return 0;
06da4f11
NIS		 2930}
2931
6f9d8c32 2932SSize_t
9e353e3b 2933PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2934{
14a5cf38
JH		 2935 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2936 if (f) {
2937 if (!b->ptr)
2938 PerlIO_get_base(f);
2939 return PerlIOBase_read(f, vbuf, count);
2940 }
2941 return 0;
6f9d8c32
NIS		 2942}
2943
9e353e3b
NIS		 2944SSize_t
2945PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2946{
14a5cf38
JH		 2947 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2948 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2949 SSize_t unread = 0;
2950 SSize_t avail;
2951 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2952 PerlIO_flush(f);
2953 if (!b->buf)
2954 PerlIO_get_base(f);
2955 if (b->buf) {
2956 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2957 /*
2958 * Buffer is already a read buffer, we can overwrite any chars
71200d45 2959 * which have been read back to buffer start
14a5cf38
JH		 2960 */
2961 avail = (b->ptr - b->buf);
2962 }
2963 else {
2964 /*
2965 * Buffer is idle, set it up so whole buffer is available for
71200d45 2966 * unread
14a5cf38
JH		 2967 */
2968 avail = b->bufsiz;
2969 b->end = b->buf + avail;
2970 b->ptr = b->end;
2971 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2972 /*
71200d45 2973 * Buffer extends _back_ from where we are now
14a5cf38
JH		 2974 */
2975 b->posn -= b->bufsiz;
2976 }
2977 if (avail > (SSize_t) count) {
2978 /*
71200d45 2979 * If we have space for more than count, just move count
14a5cf38
JH		 2980 */
2981 avail = count;
2982 }
2983 if (avail > 0) {
2984 b->ptr -= avail;
2985 buf -= avail;
2986 /*
2987 * In simple stdio-like ungetc() case chars will be already
71200d45 2988 * there
14a5cf38
JH		 2989 */
2990 if (buf != b->ptr) {
2991 Copy(buf, b->ptr, avail, STDCHAR);
2992 }
2993 count -= avail;
2994 unread += avail;
2995 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2996 }
2997 }
2998 return unread;
760ac839
LW		 2999}
3000
9e353e3b
NIS		 3001SSize_t
3002PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 3003{
14a5cf38
JH		 3004 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3005 const STDCHAR *buf = (const STDCHAR *) vbuf;
3006 Size_t written = 0;
3007 if (!b->buf)
3008 PerlIO_get_base(f);
3009 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3010 return 0;
3011 while (count > 0) {
3012 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3013 if ((SSize_t) count < avail)
3014 avail = count;
3015 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3016 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3017 while (avail > 0) {
3018 int ch = *buf++;
3019 *(b->ptr)++ = ch;
3020 count--;
3021 avail--;
3022 written++;
3023 if (ch == '\n') {
3024 PerlIO_flush(f);
3025 break;
3026 }
3027 }
3028 }
3029 else {
3030 if (avail) {
3031 Copy(buf, b->ptr, avail, STDCHAR);
3032 count -= avail;
3033 buf += avail;
3034 written += avail;
3035 b->ptr += avail;
3036 }
3037 }
3038 if (b->ptr >= (b->buf + b->bufsiz))
3039 PerlIO_flush(f);
3040 }
3041 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3042 PerlIO_flush(f);
3043 return written;
9e353e3b
NIS		 3044}
3045
3046IV
3047PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3048{
14a5cf38
JH		 3049 IV code;
3050 if ((code = PerlIO_flush(f)) == 0) {
3051 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3052 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3053 code = PerlIO_seek(PerlIONext(f), offset, whence);
3054 if (code == 0) {
3055 b->posn = PerlIO_tell(PerlIONext(f));
3056 }
9e353e3b 3057 }
14a5cf38 3058 return code;
9e353e3b
NIS		 3059}
3060
3061Off_t
3062PerlIOBuf_tell(PerlIO *f)
3063{
14a5cf38
JH		 3064 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3065 /*
71200d45 3066 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3067 */
3068 Off_t posn = b->posn;
3069 if (b->buf) {
3070 /*
71200d45 3071 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3072 */
3073 posn += (b->ptr - b->buf);
3074 }
3075 return posn;
9e353e3b
NIS		 3076}
3077
3078IV
3079PerlIOBuf_close(PerlIO *f)
3080{
14a5cf38
JH		 3081 IV code = PerlIOBase_close(f);
3082 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3083 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3084 Safefree(b->buf);
14a5cf38
JH		 3085 }
3086 b->buf = NULL;
3087 b->ptr = b->end = b->buf;
3088 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3089 return code;
760ac839
LW		 3090}
3091
9e353e3b
NIS		 3092STDCHAR *
3093PerlIOBuf_get_ptr(PerlIO *f)
3094{
14a5cf38
JH		 3095 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3096 if (!b->buf)
3097 PerlIO_get_base(f);
3098 return b->ptr;
9e353e3b
NIS		 3099}
3100
05d1247b 3101SSize_t
9e353e3b
NIS		 3102PerlIOBuf_get_cnt(PerlIO *f)
3103{
14a5cf38
JH		 3104 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3105 if (!b->buf)
3106 PerlIO_get_base(f);
3107 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3108 return (b->end - b->ptr);
3109 return 0;
9e353e3b
NIS		 3110}
3111
3112STDCHAR *
3113PerlIOBuf_get_base(PerlIO *f)
3114{
14a5cf38
JH		 3115 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3116 if (!b->buf) {
3117 if (!b->bufsiz)
3118 b->bufsiz = 4096;
a1ea730d 3119 b->buf =
7fcdafbd 3120 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3121 if (!b->buf) {
3122 b->buf = (STDCHAR *) & b->oneword;
3123 b->bufsiz = sizeof(b->oneword);
3124 }
3125 b->ptr = b->buf;
3126 b->end = b->ptr;
06da4f11 3127 }
14a5cf38 3128 return b->buf;
9e353e3b
NIS		 3129}
3130
3131Size_t
3132PerlIOBuf_bufsiz(PerlIO *f)
3133{
14a5cf38
JH		 3134 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3135 if (!b->buf)
3136 PerlIO_get_base(f);
3137 return (b->end - b->buf);
9e353e3b
NIS		 3138}
3139
3140void
14a5cf38 3141PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3142{
14a5cf38
JH		 3143 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3144 if (!b->buf)
3145 PerlIO_get_base(f);
3146 b->ptr = ptr;
3147 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3148 dTHX;
3149 assert(PerlIO_get_cnt(f) == cnt);
3150 assert(b->ptr >= b->buf);
3151 }
3152 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3153}
3154
71200d45 3155PerlIO *
8cf8f3d1 3156PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3157{
a8fc9800 3158 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3159}
3160
3161
3162
9e353e3b 3163PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3164 "perlio",
3165 sizeof(PerlIOBuf),
3166 PERLIO_K_BUFFERED,
3167 PerlIOBuf_pushed,
3168 PerlIOBase_noop_ok,
3169 PerlIOBuf_open,
3170 NULL,
3171 PerlIOBase_fileno,
71200d45 3172 PerlIOBuf_dup,
14a5cf38
JH		 3173 PerlIOBuf_read,
3174 PerlIOBuf_unread,
3175 PerlIOBuf_write,
3176 PerlIOBuf_seek,
3177 PerlIOBuf_tell,
3178 PerlIOBuf_close,
3179 PerlIOBuf_flush,
3180 PerlIOBuf_fill,
3181 PerlIOBase_eof,
3182 PerlIOBase_error,
3183 PerlIOBase_clearerr,
3184 PerlIOBase_setlinebuf,
3185 PerlIOBuf_get_base,
3186 PerlIOBuf_bufsiz,
3187 PerlIOBuf_get_ptr,
3188 PerlIOBuf_get_cnt,
3189 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3190};
3191
66ecd56b 3192/*--------------------------------------------------------------------------------------*/
14a5cf38 3193/*
71200d45 3194 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3195 */
5e2ab84b
NIS		 3196
3197IV
3198PerlIOPending_fill(PerlIO *f)
3199{
14a5cf38 3200 /*
71200d45 3201 * Should never happen
14a5cf38
JH		 3202 */
3203 PerlIO_flush(f);
3204 return 0;
5e2ab84b
NIS		 3205}
3206
3207IV
3208PerlIOPending_close(PerlIO *f)
3209{
14a5cf38 3210 /*
71200d45 3211 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3212 */
3213 PerlIO_flush(f);
3214 return PerlIO_close(f);
5e2ab84b
NIS		 3215}
3216
3217IV
3218PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3219{
14a5cf38 3220 /*
71200d45 3221 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3222 */
3223 PerlIO_flush(f);
3224 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3225}
3226
3227
3228IV
3229PerlIOPending_flush(PerlIO *f)
3230{
14a5cf38
JH		 3231 dTHX;
3232 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3233 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3234 Safefree(b->buf);
14a5cf38
JH		 3235 b->buf = NULL;
3236 }
3237 PerlIO_pop(aTHX_ f);
3238 return 0;
5e2ab84b
NIS		 3239}
3240
3241void
14a5cf38 3242PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3243{
14a5cf38
JH		 3244 if (cnt <= 0) {
3245 PerlIO_flush(f);
3246 }
3247 else {
3248 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3249 }
5e2ab84b
NIS		 3250}
3251
3252IV
14a5cf38 3253PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3254{
14a5cf38
JH		 3255 IV code = PerlIOBase_pushed(f, mode, arg);
3256 PerlIOl *l = PerlIOBase(f);
3257 /*
71200d45
NIS		 3258 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3259 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3260 */
3261 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3262 (PerlIOBase(PerlIONext(f))->
3263 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3264 return code;
5e2ab84b
NIS		 3265}
3266
3267SSize_t
3268PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3269{
14a5cf38
JH		 3270 SSize_t avail = PerlIO_get_cnt(f);
3271 SSize_t got = 0;
3272 if (count < avail)
3273 avail = count;
3274 if (avail > 0)
3275 got = PerlIOBuf_read(f, vbuf, avail);
3276 if (got >= 0 && got < count) {
3277 SSize_t more =
3278 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3279 if (more >= 0 || got == 0)
3280 got += more;
3281 }
3282 return got;
5e2ab84b
NIS		 3283}
3284
5e2ab84b 3285PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3286 "pending",
3287 sizeof(PerlIOBuf),
3288 PERLIO_K_BUFFERED,
3289 PerlIOPending_pushed,
3290 PerlIOBase_noop_ok,
3291 NULL,
3292 NULL,
3293 PerlIOBase_fileno,
71200d45 3294 PerlIOBuf_dup,
14a5cf38
JH		 3295 PerlIOPending_read,
3296 PerlIOBuf_unread,
3297 PerlIOBuf_write,
3298 PerlIOPending_seek,
3299 PerlIOBuf_tell,
3300 PerlIOPending_close,
3301 PerlIOPending_flush,
3302 PerlIOPending_fill,
3303 PerlIOBase_eof,
3304 PerlIOBase_error,
3305 PerlIOBase_clearerr,
3306 PerlIOBase_setlinebuf,
3307 PerlIOBuf_get_base,
3308 PerlIOBuf_bufsiz,
3309 PerlIOBuf_get_ptr,
3310 PerlIOBuf_get_cnt,
3311 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3312};
3313
3314
3315
3316/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3317/*
3318 * crlf - translation On read translate CR,LF to "\n" we do this by
3319 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3320 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3321 */
3322
14a5cf38
JH		 3323typedef struct {
3324 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3325 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3326 * buffer */
99efab12
NIS		 3327} PerlIOCrlf;
3328
f5b9d040 3329IV
14a5cf38 3330PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3331{
14a5cf38
JH		 3332 IV code;
3333 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3334 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3335#if 0
14a5cf38
JH		 3336 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3337 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3338 PerlIOBase(f)->flags);
5e2ab84b 3339#endif
14a5cf38 3340 return code;
f5b9d040
NIS		 3341}
3342
3343
99efab12
NIS		 3344SSize_t
3345PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3346{
14a5cf38
JH		 3347 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3348 if (c->nl) {
3349 *(c->nl) = 0xd;
3350 c->nl = NULL;
3351 }
3352 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3353 return PerlIOBuf_unread(f, vbuf, count);
3354 else {
3355 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3356 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3357 SSize_t unread = 0;
3358 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3359 PerlIO_flush(f);
3360 if (!b->buf)
3361 PerlIO_get_base(f);
3362 if (b->buf) {
3363 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3364 b->end = b->ptr = b->buf + b->bufsiz;
3365 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3366 b->posn -= b->bufsiz;
3367 }
3368 while (count > 0 && b->ptr > b->buf) {
3369 int ch = *--buf;
3370 if (ch == '\n') {
3371 if (b->ptr - 2 >= b->buf) {
3372 *--(b->ptr) = 0xa;
3373 *--(b->ptr) = 0xd;
3374 unread++;
3375 count--;
3376 }
3377 else {
3378 buf++;
3379 break;
3380 }
3381 }
3382 else {
3383 *--(b->ptr) = ch;
3384 unread++;
3385 count--;
3386 }
3387 }
3388 }
3389 return unread;
3390 }
99efab12
NIS		 3391}
3392
3393SSize_t
3394PerlIOCrlf_get_cnt(PerlIO *f)
3395{
14a5cf38
JH		 3396 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3397 if (!b->buf)
3398 PerlIO_get_base(f);
3399 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3400 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3401 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3402 STDCHAR *nl = b->ptr;
3403 scan:
3404 while (nl < b->end && *nl != 0xd)
3405 nl++;
3406 if (nl < b->end && *nl == 0xd) {
3407 test:
3408 if (nl + 1 < b->end) {
3409 if (nl[1] == 0xa) {
3410 *nl = '\n';
3411 c->nl = nl;
3412 }
3413 else {
3414 /*
71200d45 3415 * Not CR,LF but just CR
14a5cf38
JH		 3416 */
3417 nl++;
3418 goto scan;
3419 }
3420 }
3421 else {
3422 /*
71200d45 3423 * Blast - found CR as last char in buffer
14a5cf38
JH		 3424 */
3425 if (b->ptr < nl) {
3426 /*
3427 * They may not care, defer work as long as
71200d45 3428 * possible
14a5cf38
JH		 3429 */
3430 return (nl - b->ptr);
3431 }
3432 else {
3433 int code;
3434 b->ptr++; /* say we have read it as far as
3435 * flush() is concerned */
3436 b->buf++; /* Leave space an front of buffer */
3437 b->bufsiz--; /* Buffer is thus smaller */
3438 code = PerlIO_fill(f); /* Fetch some more */
3439 b->bufsiz++; /* Restore size for next time */
3440 b->buf--; /* Point at space */
3441 b->ptr = nl = b->buf; /* Which is what we hand
3442 * off */
3443 b->posn--; /* Buffer starts here */
3444 *nl = 0xd; /* Fill in the CR */
3445 if (code == 0)
3446 goto test; /* fill() call worked */
3447 /*
71200d45 3448 * CR at EOF - just fall through
14a5cf38
JH		 3449 */
3450 }
3451 }
3452 }
3453 }
3454 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3455 }
3456 return 0;
99efab12
NIS		 3457}
3458
3459void
14a5cf38
JH		 3460PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3461{
3462 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3463 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3464 IV flags = PerlIOBase(f)->flags;
3465 if (!b->buf)
3466 PerlIO_get_base(f);
3467 if (!ptr) {
3468 if (c->nl)
3469 ptr = c->nl + 1;
3470 else {
3471 ptr = b->end;
3472 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3473 ptr--;
3474 }
3475 ptr -= cnt;
3476 }
3477 else {
3478 /*
71200d45 3479 * Test code - delete when it works ...
14a5cf38
JH		 3480 */
3481 STDCHAR *chk;
3482 if (c->nl)
3483 chk = c->nl + 1;
3484 else {
3485 chk = b->end;
3486 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3487 chk--;
3488 }
3489 chk -= cnt;
3490
3491 if (ptr != chk) {
3492 dTHX;
3493 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3494 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3495 b->end, cnt);
3496 }
3497 }
3498 if (c->nl) {
3499 if (ptr > c->nl) {
3500 /*
71200d45 3501 * They have taken what we lied about
14a5cf38
JH		 3502 */
3503 *(c->nl) = 0xd;
3504 c->nl = NULL;
3505 ptr++;
3506 }
3507 }
3508 b->ptr = ptr;
3509 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3510}
3511
3512SSize_t
3513PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3514{
14a5cf38
JH		 3515 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3516 return PerlIOBuf_write(f, vbuf, count);
3517 else {
3518 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3519 const STDCHAR *buf = (const STDCHAR *) vbuf;
3520 const STDCHAR *ebuf = buf + count;
3521 if (!b->buf)
3522 PerlIO_get_base(f);
3523 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3524 return 0;
3525 while (buf < ebuf) {
3526 STDCHAR *eptr = b->buf + b->bufsiz;
3527 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3528 while (buf < ebuf && b->ptr < eptr) {
3529 if (*buf == '\n') {
3530 if ((b->ptr + 2) > eptr) {
3531 /*
71200d45 3532 * Not room for both
14a5cf38
JH		 3533 */
3534 PerlIO_flush(f);
3535 break;
3536 }
3537 else {
3538 *(b->ptr)++ = 0xd; /* CR */
3539 *(b->ptr)++ = 0xa; /* LF */
3540 buf++;
3541 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3542 PerlIO_flush(f);
3543 break;
3544 }
3545 }
3546 }
3547 else {
3548 int ch = *buf++;
3549 *(b->ptr)++ = ch;
3550 }
3551 if (b->ptr >= eptr) {
3552 PerlIO_flush(f);
3553 break;
3554 }
3555 }
3556 }
3557 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3558 PerlIO_flush(f);
3559 return (buf - (STDCHAR *) vbuf);
3560 }
99efab12
NIS		 3561}
3562
3563IV
3564PerlIOCrlf_flush(PerlIO *f)
3565{
14a5cf38
JH		 3566 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3567 if (c->nl) {
3568 *(c->nl) = 0xd;
3569 c->nl = NULL;
3570 }
3571 return PerlIOBuf_flush(f);
99efab12
NIS		 3572}
3573
66ecd56b 3574PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3575 "crlf",
3576 sizeof(PerlIOCrlf),
3577 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3578 PerlIOCrlf_pushed,
3579 PerlIOBase_noop_ok, /* popped */
3580 PerlIOBuf_open,
3581 NULL,
3582 PerlIOBase_fileno,
71200d45 3583 PerlIOBuf_dup,
14a5cf38
JH		 3584 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3585 * ... */
3586 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3587 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3588 PerlIOBuf_seek,
3589 PerlIOBuf_tell,
3590 PerlIOBuf_close,
3591 PerlIOCrlf_flush,
3592 PerlIOBuf_fill,
3593 PerlIOBase_eof,
3594 PerlIOBase_error,
3595 PerlIOBase_clearerr,
3596 PerlIOBase_setlinebuf,
3597 PerlIOBuf_get_base,
3598 PerlIOBuf_bufsiz,
3599 PerlIOBuf_get_ptr,
3600 PerlIOCrlf_get_cnt,
3601 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3602};
3603
06da4f11
NIS		 3604#ifdef HAS_MMAP
3605/*--------------------------------------------------------------------------------------*/
14a5cf38 3606/*
71200d45 3607 * mmap as "buffer" layer
14a5cf38 3608 */
06da4f11 3609
14a5cf38
JH		 3610typedef struct {
3611 PerlIOBuf base; /* PerlIOBuf stuff */
3612 Mmap_t mptr; /* Mapped address */
3613 Size_t len; /* mapped length */
3614 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3615} PerlIOMmap;
3616
c3d7c7c9
NIS		 3617static size_t page_size = 0;
3618
06da4f11
NIS		 3619IV
3620PerlIOMmap_map(PerlIO *f)
3621{
14a5cf38
JH		 3622 dTHX;
3623 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3624 IV flags = PerlIOBase(f)->flags;
3625 IV code = 0;
3626 if (m->len)
3627 abort();
3628 if (flags & PERLIO_F_CANREAD) {
3629 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3630 int fd = PerlIO_fileno(f);
3631 struct stat st;
3632 code = fstat(fd, &st);
3633 if (code == 0 && S_ISREG(st.st_mode)) {
3634 SSize_t len = st.st_size - b->posn;
3635 if (len > 0) {
3636 Off_t posn;
3637 if (!page_size) {
68d873c6 3638#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3639 {
3640 SETERRNO(0, SS$_NORMAL);
68d873c6 3641# ifdef _SC_PAGESIZE
14a5cf38 3642 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3643# else
14a5cf38 3644 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3645# endif
14a5cf38
JH		 3646 if ((long) page_size < 0) {
3647 if (errno) {
3648 SV *error = ERRSV;
3649 char *msg;
3650 STRLEN n_a;
3651 (void) SvUPGRADE(error, SVt_PV);
3652 msg = SvPVx(error, n_a);
3653 Perl_croak(aTHX_ "panic: sysconf: %s",
3654 msg);
3655 }
3656 else
3657 Perl_croak(aTHX_
3658 "panic: sysconf: pagesize unknown");
3659 }
3660 }
68d873c6
JH		 3661#else
3662# ifdef HAS_GETPAGESIZE
14a5cf38 3663 page_size = getpagesize();
68d873c6
JH		 3664# else
3665# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3666 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3667# endif
3668# endif
3669#endif
14a5cf38
JH		 3670 if ((IV) page_size <= 0)
3671 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3672 (IV) page_size);
3673 }
3674 if (b->posn < 0) {
3675 /*
3676 * This is a hack - should never happen - open should
71200d45 3677 * have set it !
14a5cf38
JH		 3678 */
3679 b->posn = PerlIO_tell(PerlIONext(f));
3680 }
3681 posn = (b->posn / page_size) * page_size;
3682 len = st.st_size - posn;
3683 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3684 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3685#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3686 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3687#endif
a5262162 3688#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3689 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3690#endif
14a5cf38
JH		 3691 PerlIOBase(f)->flags =
3692 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3693 b->end = ((STDCHAR *) m->mptr) + len;
3694 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3695 b->ptr = b->buf;
3696 m->len = len;
3697 }
3698 else {
3699 b->buf = NULL;
3700 }
3701 }
3702 else {
3703 PerlIOBase(f)->flags =
3704 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3705 b->buf = NULL;
3706 b->ptr = b->end = b->ptr;
3707 code = -1;
3708 }
3709 }
3710 }
3711 return code;
06da4f11
NIS		 3712}
3713
3714IV
3715PerlIOMmap_unmap(PerlIO *f)
3716{
14a5cf38
JH		 3717 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3718 PerlIOBuf *b = &m->base;
3719 IV code = 0;
3720 if (m->len) {
3721 if (b->buf) {
3722 code = munmap(m->mptr, m->len);
3723 b->buf = NULL;
3724 m->len = 0;
3725 m->mptr = NULL;
3726 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3727 code = -1;
3728 }
3729 b->ptr = b->end = b->buf;
3730 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3731 }
3732 return code;
06da4f11
NIS		 3733}
3734
3735STDCHAR *
3736PerlIOMmap_get_base(PerlIO *f)
3737{
14a5cf38
JH		 3738 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3739 PerlIOBuf *b = &m->base;
3740 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3741 /*
71200d45 3742 * Already have a readbuffer in progress
14a5cf38
JH		 3743 */
3744 return b->buf;
3745 }
3746 if (b->buf) {
3747 /*
71200d45 3748 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3749 */
3750 m->bbuf = b->buf; /* save it in case we need it again */
3751 b->buf = NULL; /* Clear to trigger below */
3752 }
3753 if (!b->buf) {
3754 PerlIOMmap_map(f); /* Try and map it */
3755 if (!b->buf) {
3756 /*
71200d45 3757 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3758 */
3759 b->buf = m->bbuf;
3760 }
3761 }
3762 b->ptr = b->end = b->buf;
3763 if (b->buf)
3764 return b->buf;
3765 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3766}
3767
3768SSize_t
3769PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3770{
14a5cf38
JH		 3771 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3772 PerlIOBuf *b = &m->base;
3773 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3774 PerlIO_flush(f);
3775 if (b->ptr && (b->ptr - count) >= b->buf
3776 && memEQ(b->ptr - count, vbuf, count)) {
3777 b->ptr -= count;
3778 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3779 return count;
3780 }
3781 if (m->len) {
3782 /*
71200d45 3783 * Loose the unwritable mapped buffer
14a5cf38
JH		 3784 */
3785 PerlIO_flush(f);
3786 /*
71200d45 3787 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3788 */
3789 if (!b->buf && m->bbuf)
3790 b->buf = m->bbuf;
3791 if (!b->buf) {
3792 PerlIOBuf_get_base(f);
3793 m->bbuf = b->buf;
3794 }
3795 }
3796 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3797}
3798
3799SSize_t
3800PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3801{
14a5cf38
JH		 3802 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3803 PerlIOBuf *b = &m->base;
3804 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3805 /*
71200d45 3806 * No, or wrong sort of, buffer
14a5cf38
JH		 3807 */
3808 if (m->len) {
3809 if (PerlIOMmap_unmap(f) != 0)
3810 return 0;
3811 }
3812 /*
71200d45 3813 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3814 */
3815 if (!b->buf && m->bbuf)
3816 b->buf = m->bbuf;
3817 if (!b->buf) {
3818 PerlIOBuf_get_base(f);
3819 m->bbuf = b->buf;
3820 }
06da4f11 3821 }
14a5cf38 3822 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3823}
3824
3825IV
3826PerlIOMmap_flush(PerlIO *f)
3827{
14a5cf38
JH		 3828 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3829 PerlIOBuf *b = &m->base;
3830 IV code = PerlIOBuf_flush(f);
3831 /*
71200d45 3832 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3833 */
3834 if (b->buf) {
3835 if (m->len) {
3836 /*
71200d45 3837 * Unmap the buffer
14a5cf38
JH		 3838 */
3839 if (PerlIOMmap_unmap(f) != 0)
3840 code = -1;
3841 }
3842 else {
3843 /*
3844 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3845 * remember it in case we need one later
14a5cf38
JH		 3846 */
3847 m->bbuf = b->buf;
3848 }
3849 }
3850 return code;
06da4f11
NIS		 3851}
3852
3853IV
3854PerlIOMmap_fill(PerlIO *f)
3855{
14a5cf38
JH		 3856 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3857 IV code = PerlIO_flush(f);
3858 if (code == 0 && !b->buf) {
3859 code = PerlIOMmap_map(f);
3860 }
3861 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3862 code = PerlIOBuf_fill(f);
3863 }
3864 return code;
06da4f11
NIS		 3865}
3866
3867IV
3868PerlIOMmap_close(PerlIO *f)
3869{
14a5cf38
JH		 3870 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3871 PerlIOBuf *b = &m->base;
3872 IV code = PerlIO_flush(f);
3873 if (m->bbuf) {
3874 b->buf = m->bbuf;
3875 m->bbuf = NULL;
3876 b->ptr = b->end = b->buf;
3877 }
3878 if (PerlIOBuf_close(f) != 0)
3879 code = -1;
3880 return code;
06da4f11
NIS		 3881}
3882
71200d45 3883PerlIO *
8cf8f3d1 3884PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3885{
a8fc9800 3886 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3887}
3888
06da4f11
NIS		 3889
3890PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3891 "mmap",
3892 sizeof(PerlIOMmap),
3893 PERLIO_K_BUFFERED,
3894 PerlIOBuf_pushed,
3895 PerlIOBase_noop_ok,
3896 PerlIOBuf_open,
3897 NULL,
3898 PerlIOBase_fileno,
71200d45 3899 PerlIOMmap_dup,
14a5cf38
JH		 3900 PerlIOBuf_read,
3901 PerlIOMmap_unread,
3902 PerlIOMmap_write,
3903 PerlIOBuf_seek,
3904 PerlIOBuf_tell,
3905 PerlIOBuf_close,
3906 PerlIOMmap_flush,
3907 PerlIOMmap_fill,
3908 PerlIOBase_eof,
3909 PerlIOBase_error,
3910 PerlIOBase_clearerr,
3911 PerlIOBase_setlinebuf,
3912 PerlIOMmap_get_base,
3913 PerlIOBuf_bufsiz,
3914 PerlIOBuf_get_ptr,
3915 PerlIOBuf_get_cnt,
3916 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3917};
3918
14a5cf38 3919#endif /* HAS_MMAP */
06da4f11 3920
9e353e3b 3921void
3a1ee7e8 3922PerlIO_init(pTHX)
760ac839 3923{
3a1ee7e8 3924 /* Place holder for stdstreams call ??? */
760ac839
LW		 3925}
3926
9e353e3b
NIS		 3927#undef PerlIO_stdin
3928PerlIO *
3929PerlIO_stdin(void)
3930{
a1ea730d
NIS		 3931 dTHX;
3932 if (!PL_perlio) {
14a5cf38
JH		 3933 PerlIO_stdstreams(aTHX);
3934 }
a1ea730d 3935 return &PL_perlio[1];
9e353e3b
NIS		 3936}
3937
3938#undef PerlIO_stdout
3939PerlIO *
3940PerlIO_stdout(void)
3941{
a1ea730d
NIS		 3942 dTHX;
3943 if (!PL_perlio) {
14a5cf38
JH		 3944 PerlIO_stdstreams(aTHX);
3945 }
a1ea730d 3946 return &PL_perlio[2];
9e353e3b
NIS		 3947}
3948
3949#undef PerlIO_stderr
3950PerlIO *
3951PerlIO_stderr(void)
3952{
a1ea730d
NIS		 3953 dTHX;
3954 if (!PL_perlio) {
14a5cf38
JH		 3955 PerlIO_stdstreams(aTHX);
3956 }
a1ea730d 3957 return &PL_perlio[3];
9e353e3b
NIS		 3958}
3959
3960/*--------------------------------------------------------------------------------------*/
3961
3962#undef PerlIO_getname
3963char *
3964PerlIO_getname(PerlIO *f, char *buf)
3965{
14a5cf38
JH		 3966 dTHX;
3967 char *name = NULL;
a15cef0c 3968#ifdef VMS
14a5cf38
JH		 3969 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3970 if (stdio)
3971 name = fgetname(stdio, buf);
a15cef0c 3972#else
14a5cf38 3973 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 3974#endif
14a5cf38 3975 return name;
9e353e3b
NIS		 3976}
3977
3978
3979/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3980/*
3981 * Functions which can be called on any kind of PerlIO implemented in
71200d45 3982 * terms of above
14a5cf38 3983 */
9e353e3b
NIS		 3984
3985#undef PerlIO_getc
6f9d8c32 3986int
9e353e3b 3987PerlIO_getc(PerlIO *f)
760ac839 3988{
14a5cf38
JH		 3989 STDCHAR buf[1];
3990 SSize_t count = PerlIO_read(f, buf, 1);
3991 if (count == 1) {
3992 return (unsigned char) buf[0];
3993 }
3994 return EOF;
313ca112
NIS		 3995}
3996
3997#undef PerlIO_ungetc
3998int
3999PerlIO_ungetc(PerlIO *f, int ch)
4000{
14a5cf38
JH		 4001 if (ch != EOF) {
4002 STDCHAR buf = ch;
4003 if (PerlIO_unread(f, &buf, 1) == 1)
4004 return ch;
4005 }
4006 return EOF;
760ac839
LW		 4007}
4008
9e353e3b
NIS		 4009#undef PerlIO_putc
4010int
4011PerlIO_putc(PerlIO *f, int ch)
760ac839 4012{
14a5cf38
JH		 4013 STDCHAR buf = ch;
4014 return PerlIO_write(f, &buf, 1);
760ac839
LW		 4015}
4016
9e353e3b 4017#undef PerlIO_puts
760ac839 4018int
9e353e3b 4019PerlIO_puts(PerlIO *f, const char *s)
760ac839 4020{
14a5cf38
JH		 4021 STRLEN len = strlen(s);
4022 return PerlIO_write(f, s, len);
760ac839
LW		 4023}
4024
4025#undef PerlIO_rewind
4026void
c78749f2 4027PerlIO_rewind(PerlIO *f)
760ac839 4028{
14a5cf38
JH		 4029 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4030 PerlIO_clearerr(f);
6f9d8c32
NIS		 4031}
4032
4033#undef PerlIO_vprintf
4034int
4035PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4036{
14a5cf38
JH		 4037 dTHX;
4038 SV *sv = newSVpvn("", 0);
4039 char *s;
4040 STRLEN len;
4041 SSize_t wrote;
2cc61e15 4042#ifdef NEED_VA_COPY
14a5cf38
JH		 4043 va_list apc;
4044 Perl_va_copy(ap, apc);
4045 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 4046#else
14a5cf38 4047 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 4048#endif
14a5cf38
JH		 4049 s = SvPV(sv, len);
4050 wrote = PerlIO_write(f, s, len);
4051 SvREFCNT_dec(sv);
4052 return wrote;
760ac839
LW		 4053}
4054
4055#undef PerlIO_printf
6f9d8c32 4056int
14a5cf38 4057PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 4058{
14a5cf38
JH		 4059 va_list ap;
4060 int result;
4061 va_start(ap, fmt);
4062 result = PerlIO_vprintf(f, fmt, ap);
4063 va_end(ap);
4064 return result;
760ac839
LW		 4065}
4066
4067#undef PerlIO_stdoutf
6f9d8c32 4068int
14a5cf38 4069PerlIO_stdoutf(const char *fmt, ...)
760ac839 4070{
14a5cf38
JH		 4071 va_list ap;
4072 int result;
4073 va_start(ap, fmt);
4074 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4075 va_end(ap);
4076 return result;
760ac839
LW		 4077}
4078
4079#undef PerlIO_tmpfile
4080PerlIO *
c78749f2 4081PerlIO_tmpfile(void)
760ac839 4082{
14a5cf38 4083 /*
71200d45 4084 * I have no idea how portable mkstemp() is ...
14a5cf38 4085 */
83b075c3 4086#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 4087 dTHX;
4088 PerlIO *f = NULL;
4089 FILE *stdio = PerlSIO_tmpfile();
4090 if (stdio) {
4091 PerlIOStdio *s =
4092 PerlIOSelf(PerlIO_push
4093 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4094 "w+", Nullsv), PerlIOStdio);
4095 s->stdio = stdio;
4096 }
4097 return f;
83b075c3 4098#else
14a5cf38
JH		 4099 dTHX;
4100 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4101 int fd = mkstemp(SvPVX(sv));
4102 PerlIO *f = NULL;
4103 if (fd >= 0) {
4104 f = PerlIO_fdopen(fd, "w+");
4105 if (f) {
4106 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4107 }
4108 PerlLIO_unlink(SvPVX(sv));
4109 SvREFCNT_dec(sv);
4110 }
4111 return f;
83b075c3 4112#endif
760ac839
LW		 4113}
4114
6f9d8c32
NIS		 4115#undef HAS_FSETPOS
4116#undef HAS_FGETPOS
4117
14a5cf38
JH		 4118#endif /* USE_SFIO */
4119#endif /* PERLIO_IS_STDIO */
760ac839 4120
9e353e3b 4121/*======================================================================================*/
14a5cf38 4122/*
71200d45
NIS		 4123 * Now some functions in terms of above which may be needed even if we are
4124 * not in true PerlIO mode
9e353e3b
NIS		 4125 */
4126
760ac839
LW		 4127#ifndef HAS_FSETPOS
4128#undef PerlIO_setpos
4129int
766a733e 4130PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 4131{
14a5cf38
JH		 4132 dTHX;
4133 if (SvOK(pos)) {
4134 STRLEN len;
4135 Off_t *posn = (Off_t *) SvPV(pos, len);
4136 if (f && len == sizeof(Off_t))
4137 return PerlIO_seek(f, *posn, SEEK_SET);
4138 }
4139 SETERRNO(EINVAL, SS$_IVCHAN);
4140 return -1;
760ac839 4141}
c411622e 4142#else
c411622e 4143#undef PerlIO_setpos
4144int
766a733e 4145PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 4146{
14a5cf38
JH		 4147 dTHX;
4148 if (SvOK(pos)) {
4149 STRLEN len;
4150 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4151 if (f && len == sizeof(Fpos_t)) {
2d4389e4 4152#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4153 return fsetpos64(f, fpos);
d9b3e12d 4154#else
14a5cf38 4155 return fsetpos(f, fpos);
d9b3e12d 4156#endif
14a5cf38 4157 }
766a733e 4158 }
14a5cf38
JH		 4159 SETERRNO(EINVAL, SS$_IVCHAN);
4160 return -1;
c411622e 4161}
4162#endif
760ac839
LW		 4163
4164#ifndef HAS_FGETPOS
4165#undef PerlIO_getpos
4166int
766a733e 4167PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 4168{
14a5cf38
JH		 4169 dTHX;
4170 Off_t posn = PerlIO_tell(f);
4171 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4172 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 4173}
c411622e 4174#else
c411622e 4175#undef PerlIO_getpos
4176int
766a733e 4177PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 4178{
14a5cf38
JH		 4179 dTHX;
4180 Fpos_t fpos;
4181 int code;
2d4389e4 4182#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4183 code = fgetpos64(f, &fpos);
d9b3e12d 4184#else
14a5cf38 4185 code = fgetpos(f, &fpos);
d9b3e12d 4186#endif
14a5cf38
JH		 4187 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4188 return code;
c411622e 4189}
4190#endif
760ac839
LW		 4191
4192#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4193
4194int
c78749f2 4195vprintf(char *pat, char *args)
662a7e3f
CS		 4196{
4197 _doprnt(pat, args, stdout);
14a5cf38
JH		 4198 return 0; /* wrong, but perl doesn't use the return
4199 * value */
662a7e3f
CS		 4200}
4201
4202int
c78749f2 4203vfprintf(FILE *fd, char *pat, char *args)
760ac839
LW		 4204{
4205 _doprnt(pat, args, fd);
14a5cf38
JH		 4206 return 0; /* wrong, but perl doesn't use the return
4207 * value */
760ac839
LW		 4208}
4209
4210#endif
4211
4212#ifndef PerlIO_vsprintf
6f9d8c32 4213int
8ac85365 4214PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
760ac839 4215{
14a5cf38
JH		 4216 int val = vsprintf(s, fmt, ap);
4217 if (n >= 0) {
4218 if (strlen(s) >= (STRLEN) n) {
4219 dTHX;
4220 (void) PerlIO_puts(Perl_error_log,
4221 "panic: sprintf overflow - memory corrupted!\n");
4222 my_exit(1);
4223 }
760ac839 4224 }
14a5cf38 4225 return val;
760ac839
LW		 4226}
4227#endif
4228
4229#ifndef PerlIO_sprintf
6f9d8c32 4230int
14a5cf38 4231PerlIO_sprintf(char *s, int n, const char *fmt, ...)
760ac839 4232{
14a5cf38
JH		 4233 va_list ap;
4234 int result;
4235 va_start(ap, fmt);
4236 result = PerlIO_vsprintf(s, n, fmt, ap);
4237 va_end(ap);
4238 return result;
760ac839
LW		 4239}
4240#endif
7fcdafbd 4241
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