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Fix typos in new locking on MemShared
[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
JH		 407 */
408PerlIO *_perlio = NULL;
05d1247b 409#define PERLIO_TABLE_SIZE 64
6f9d8c32 410
e3f3bf95
NIS		 411
412
760ac839 413PerlIO *
5f1a76d0 414PerlIO_allocate(pTHX)
6f9d8c32 415{
14a5cf38 416 /*
71200d45 417 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 418 */
419 PerlIO **last;
420 PerlIO *f;
421 last = &_perlio;
422 while ((f = *last)) {
423 int i;
424 last = (PerlIO **) (f);
425 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
426 if (!*++f) {
427 return f;
428 }
429 }
430 }
431 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
432 if (!f) {
433 return NULL;
434 }
435 *last = f;
436 return f + 1;
05d1247b
NIS		 437}
438
439void
5f1a76d0 440PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 441{
14a5cf38
JH		 442 PerlIO *table = *tablep;
443 if (table) {
444 int i;
445 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
446 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
447 PerlIO *f = table + i;
448 if (*f) {
449 PerlIO_close(f);
450 }
451 }
452 PerlMemShared_free(table);
453 *tablep = NULL;
05d1247b 454 }
05d1247b
NIS		 455}
456
fcf2db38
NIS		 457PerlIO_list_t *PerlIO_known_layers;
458PerlIO_list_t *PerlIO_def_layerlist;
459
460PerlIO_list_t *
461PerlIO_list_alloc(void)
462{
14a5cf38
JH		 463 PerlIO_list_t *list;
464 Newz('L', list, 1, PerlIO_list_t);
465 list->refcnt = 1;
466 return list;
fcf2db38
NIS		 467}
468
469void
470PerlIO_list_free(PerlIO_list_t *list)
471{
14a5cf38
JH		 472 if (list) {
473 if (--list->refcnt == 0) {
474 if (list->array) {
475 dTHX;
476 IV i;
477 for (i = 0; i < list->cur; i++) {
478 if (list->array[i].arg)
479 SvREFCNT_dec(list->array[i].arg);
480 }
481 Safefree(list->array);
482 }
483 Safefree(list);
484 }
485 }
fcf2db38
NIS		 486}
487
488void
14a5cf38
JH		 489PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
490{
491 dTHX;
492 PerlIO_pair_t *p;
493 if (list->cur >= list->len) {
494 list->len += 8;
495 if (list->array)
496 Renew(list->array, list->len, PerlIO_pair_t);
497 else
498 New('l', list->array, list->len, PerlIO_pair_t);
499 }
500 p = &(list->array[list->cur++]);
501 p->funcs = funcs;
502 if ((p->arg = arg)) {
503 SvREFCNT_inc(arg);
504 }
fcf2db38
NIS		 505}
506
4a4a6116 507
05d1247b 508void
acfe0abc 509PerlIO_cleanup_layers(pTHX_ void *data)
9a6404c5 510{
fcf2db38 511#if 0
14a5cf38
JH		 512 PerlIO_known_layers = Nullhv;
513 PerlIO_def_layerlist = Nullav;
fcf2db38 514#endif
9a6404c5
DM		 515}
516
517void
5f1a76d0 518PerlIO_cleanup()
05d1247b 519{
14a5cf38
JH		 520 dTHX;
521 PerlIO_cleantable(aTHX_ & _perlio);
6f9d8c32
NIS		 522}
523
9e353e3b 524void
13621cfb
NIS		 525PerlIO_destruct(pTHX)
526{
14a5cf38
JH		 527 PerlIO **table = &_perlio;
528 PerlIO *f;
529 while ((f = *table)) {
530 int i;
531 table = (PerlIO **) (f++);
532 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
533 PerlIO *x = f;
534 PerlIOl *l;
535 while ((l = *x)) {
536 if (l->tab->kind & PERLIO_K_DESTRUCT) {
537 PerlIO_debug("Destruct popping %s\n", l->tab->name);
538 PerlIO_flush(x);
539 PerlIO_pop(aTHX_ x);
540 }
541 else {
542 x = PerlIONext(x);
543 }
544 }
545 f++;
546 }
547 }
13621cfb
NIS		 548}
549
550void
a999f61b 551PerlIO_pop(pTHX_ PerlIO *f)
760ac839 552{
14a5cf38
JH		 553 PerlIOl *l = *f;
554 if (l) {
555 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
556 if (l->tab->Popped) {
557 /*
558 * If popped returns non-zero do not free its layer structure
559 * it has either done so itself, or it is shared and still in
71200d45 560 * use
14a5cf38
JH		 561 */
562 if ((*l->tab->Popped) (f) != 0)
563 return;
564 }
565 *f = l->next;;
566 PerlMemShared_free(l);
a8c08ecd 567 }
6f9d8c32
NIS		 568}
569
9e353e3b 570/*--------------------------------------------------------------------------------------*/
14a5cf38 571/*
71200d45 572 * XS Interface for perl code
14a5cf38 573 */
9e353e3b 574
fcf2db38 575PerlIO_funcs *
2edd7e44 576PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 577{
14a5cf38
JH		 578 IV i;
579 if ((SSize_t) len <= 0)
580 len = strlen(name);
581 for (i = 0; i < PerlIO_known_layers->cur; i++) {
582 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
583 if (memEQ(f->name, name, len)) {
584 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
585 return f;
586 }
587 }
588 if (load && PL_subname && PerlIO_def_layerlist
589 && PerlIO_def_layerlist->cur >= 2) {
590 SV *pkgsv = newSVpvn("PerlIO", 6);
591 SV *layer = newSVpvn(name, len);
592 ENTER;
593 /*
71200d45 594 * The two SVs are magically freed by load_module
14a5cf38
JH		 595 */
596 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
597 LEAVE;
598 return PerlIO_find_layer(aTHX_ name, len, 0);
599 }
600 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
601 return NULL;
f3862f8b
NIS		 602}
603
2a1bc955 604#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 605
606static int
607perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
608{
14a5cf38
JH		 609 if (SvROK(sv)) {
610 IO *io = GvIOn((GV *) SvRV(sv));
611 PerlIO *ifp = IoIFP(io);
612 PerlIO *ofp = IoOFP(io);
613 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
614 }
615 return 0;
b13b2135
NIS		 616}
617
618static int
619perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
620{
14a5cf38
JH		 621 if (SvROK(sv)) {
622 IO *io = GvIOn((GV *) SvRV(sv));
623 PerlIO *ifp = IoIFP(io);
624 PerlIO *ofp = IoOFP(io);
625 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
626 }
627 return 0;
b13b2135
NIS		 628}
629
630static int
631perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
632{
14a5cf38
JH		 633 Perl_warn(aTHX_ "clear %" SVf, sv);
634 return 0;
b13b2135
NIS		 635}
636
637static int
638perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
639{
14a5cf38
JH		 640 Perl_warn(aTHX_ "free %" SVf, sv);
641 return 0;
b13b2135
NIS		 642}
643
644MGVTBL perlio_vtab = {
14a5cf38
JH		 645 perlio_mg_get,
646 perlio_mg_set,
647 NULL, /* len */
648 perlio_mg_clear,
649 perlio_mg_free
b13b2135
NIS		 650};
651
652XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
653{
14a5cf38
JH		 654 dXSARGS;
655 SV *sv = SvRV(ST(1));
656 AV *av = newAV();
657 MAGIC *mg;
658 int count = 0;
659 int i;
660 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
661 SvRMAGICAL_off(sv);
662 mg = mg_find(sv, PERL_MAGIC_ext);
663 mg->mg_virtual = &perlio_vtab;
664 mg_magical(sv);
665 Perl_warn(aTHX_ "attrib %" SVf, sv);
666 for (i = 2; i < items; i++) {
667 STRLEN len;
668 const char *name = SvPV(ST(i), len);
669 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
670 if (layer) {
671 av_push(av, SvREFCNT_inc(layer));
672 }
673 else {
674 ST(count) = ST(i);
675 count++;
676 }
677 }
678 SvREFCNT_dec(av);
679 XSRETURN(count);
680}
681
682#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 683
e3f3bf95
NIS		 684SV *
685PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 686{
14a5cf38
JH		 687 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
688 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
689 return sv;
e3f3bf95
NIS		 690}
691
0c4f7ff0
NIS		 692XS(XS_PerlIO__Layer__find)
693{
14a5cf38
JH		 694 dXSARGS;
695 if (items < 2)
696 Perl_croak(aTHX_ "Usage class->find(name[,load])");
697 else {
698 STRLEN len = 0;
699 char *name = SvPV(ST(1), len);
700 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
701 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
702 ST(0) =
703 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
704 &PL_sv_undef;
705 XSRETURN(1);
706 }
0c4f7ff0
NIS		 707}
708
e3f3bf95
NIS		 709void
710PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
711{
14a5cf38
JH		 712 if (!PerlIO_known_layers)
713 PerlIO_known_layers = PerlIO_list_alloc();
714 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
715 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 716}
717
1141d9f8 718int
fcf2db38 719PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 720{
14a5cf38
JH		 721 if (names) {
722 const char *s = names;
723 while (*s) {
724 while (isSPACE(*s) || *s == ':')
725 s++;
726 if (*s) {
727 STRLEN llen = 0;
728 const char *e = s;
729 const char *as = Nullch;
730 STRLEN alen = 0;
731 if (!isIDFIRST(*s)) {
732 /*
733 * Message is consistent with how attribute lists are
734 * passed. Even though this means "foo : : bar" is
71200d45 735 * seen as an invalid separator character.
14a5cf38
JH		 736 */
737 char q = ((*s == '\'') ? '"' : '\'');
738 Perl_warn(aTHX_
739 "perlio: invalid separator character %c%c%c in layer specification list",
740 q, *s, q);
741 return -1;
742 }
743 do {
744 e++;
745 } while (isALNUM(*e));
746 llen = e - s;
747 if (*e == '(') {
748 int nesting = 1;
749 as = ++e;
750 while (nesting) {
751 switch (*e++) {
752 case ')':
753 if (--nesting == 0)
754 alen = (e - 1) - as;
755 break;
756 case '(':
757 ++nesting;
758 break;
759 case '\\':
760 /*
761 * It's a nul terminated string, not allowed
762 * to \ the terminating null. Anything other
71200d45 763 * character is passed over.
14a5cf38
JH		 764 */
765 if (*e++) {
766 break;
767 }
768 /*
71200d45 769 * Drop through
14a5cf38
JH		 770 */
771 case '\0':
772 e--;
773 Perl_warn(aTHX_
774 "perlio: argument list not closed for layer \"%.*s\"",
775 (int) (e - s), s);
776 return -1;
777 default:
778 /*
71200d45 779 * boring.
14a5cf38
JH		 780 */
781 break;
782 }
783 }
784 }
785 if (e > s) {
786 PerlIO_funcs *layer =
787 PerlIO_find_layer(aTHX_ s, llen, 1);
788 if (layer) {
789 PerlIO_list_push(av, layer,
790 (as) ? newSVpvn(as,
791 alen) :
792 &PL_sv_undef);
793 }
794 else {
795 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
796 (int) llen, s);
797 return -1;
798 }
799 }
800 s = e;
801 }
802 }
803 }
804 return 0;
1141d9f8
NIS		 805}
806
dfebf958 807void
fcf2db38 808PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 809{
14a5cf38
JH		 810 PerlIO_funcs *tab = &PerlIO_perlio;
811 if (O_BINARY != O_TEXT) {
812 tab = &PerlIO_crlf;
813 }
814 else {
815 if (PerlIO_stdio.Set_ptrcnt) {
816 tab = &PerlIO_stdio;
817 }
dfebf958 818 }
14a5cf38
JH		 819 PerlIO_debug("Pushing %s\n", tab->name);
820 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
821 &PL_sv_undef);
dfebf958
NIS		 822}
823
e3f3bf95 824SV *
14a5cf38 825PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 826{
14a5cf38 827 return av->array[n].arg;
e3f3bf95
NIS		 828}
829
f3862f8b 830PerlIO_funcs *
14a5cf38 831PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 832{
14a5cf38
JH		 833 if (n >= 0 && n < av->cur) {
834 PerlIO_debug("Layer %" IVdf " is %s\n", n,
835 av->array[n].funcs->name);
836 return av->array[n].funcs;
837 }
838 if (!def)
839 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
840 return def;
e3f3bf95
NIS		 841}
842
fcf2db38 843PerlIO_list_t *
e3f3bf95
NIS		 844PerlIO_default_layers(pTHX)
845{
14a5cf38
JH		 846 if (!PerlIO_def_layerlist) {
847 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
848 PerlIO_funcs *osLayer = &PerlIO_unix;
849 PerlIO_def_layerlist = PerlIO_list_alloc();
850 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 851#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 852 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 853#if 0
14a5cf38 854 osLayer = &PerlIO_win32;
0c4128ad 855#endif
2f8118af 856#endif
14a5cf38
JH		 857 PerlIO_define_layer(aTHX_ & PerlIO_raw);
858 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
859 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
860 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 861#ifdef HAS_MMAP
14a5cf38 862 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 863#endif
14a5cf38
JH		 864 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
865 PerlIO_define_layer(aTHX_ & PerlIO_byte);
866 PerlIO_list_push(PerlIO_def_layerlist,
867 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
868 &PL_sv_undef);
869 if (s) {
870 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
871 }
872 else {
873 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
874 }
1141d9f8 875 }
14a5cf38
JH		 876 if (PerlIO_def_layerlist->cur < 2) {
877 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
f3862f8b 878 }
14a5cf38 879 return PerlIO_def_layerlist;
e3f3bf95
NIS		 880}
881
0c4f7ff0
NIS		 882void
883Perl_boot_core_PerlIO(pTHX)
884{
885#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 886 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
887 __FILE__);
0c4f7ff0 888#endif
14a5cf38 889 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 890}
e3f3bf95
NIS		 891
892PerlIO_funcs *
893PerlIO_default_layer(pTHX_ I32 n)
894{
14a5cf38
JH		 895 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
896 if (n < 0)
897 n += av->cur;
898 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 899}
900
a999f61b
NIS		 901#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
902#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 903
904void
1141d9f8 905PerlIO_stdstreams(pTHX)
60382766 906{
14a5cf38
JH		 907 if (!_perlio) {
908 PerlIO_allocate(aTHX);
909 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
910 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
911 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
912 }
60382766
NIS		 913}
914
915PerlIO *
14a5cf38
JH		 916PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
917{
918 PerlIOl *l = NULL;
919 l = PerlMemShared_calloc(tab->size, sizeof(char));
920 if (l) {
921 Zero(l, tab->size, char);
922 l->next = *f;
923 l->tab = tab;
924 *f = l;
925 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
926 (mode) ? mode : "(Null)", arg);
927 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
928 PerlIO_pop(aTHX_ f);
929 return NULL;
930 }
931 }
932 return f;
60382766
NIS		 933}
934
dfebf958 935IV
e3f3bf95 936PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 937{
14a5cf38
JH		 938 dTHX;
939 PerlIO_pop(aTHX_ f);
940 if (*f) {
941 PerlIO_flush(f);
942 PerlIO_pop(aTHX_ f);
943 return 0;
944 }
945 return -1;
4b803d04
NIS		 946}
947
948IV
e3f3bf95 949PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 950{
14a5cf38 951 /*
71200d45 952 * Remove the dummy layer
14a5cf38
JH		 953 */
954 dTHX;
955 PerlIO_pop(aTHX_ f);
956 /*
71200d45 957 * Pop back to bottom layer
14a5cf38
JH		 958 */
959 if (f && *f) {
960 PerlIO_flush(f);
961 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
962 if (*PerlIONext(f)) {
963 PerlIO_pop(aTHX_ f);
964 }
965 else {
966 /*
71200d45 967 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 968 */
969 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
970 PerlIO_pop(aTHX_ PerlIONext(f));
971 }
972 break;
973 }
974 }
975 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
976 return 0;
977 }
978 return -1;
dfebf958
NIS		 979}
980
ac27b0f5 981int
14a5cf38
JH		 982PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
983 PerlIO_list_t *layers, IV n)
984{
985 IV max = layers->cur;
986 int code = 0;
987 while (n < max) {
988 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
989 if (tab) {
990 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
991 code = -1;
992 break;
993 }
994 }
995 n++;
996 }
997 return code;
e3f3bf95
NIS		 998}
999
1000int
ac27b0f5
NIS		 1001PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1002{
14a5cf38
JH		 1003 int code = 0;
1004 if (names) {
1005 PerlIO_list_t *layers = PerlIO_list_alloc();
1006 code = PerlIO_parse_layers(aTHX_ layers, names);
1007 if (code == 0) {
1008 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1009 }
1010 PerlIO_list_free(layers);
ac27b0f5 1011 }
14a5cf38 1012 return code;
ac27b0f5
NIS		 1013}
1014
f3862f8b 1015
60382766 1016/*--------------------------------------------------------------------------------------*/
14a5cf38 1017/*
71200d45 1018 * Given the abstraction above the public API functions
14a5cf38 1019 */
60382766
NIS		 1020
1021int
f5b9d040 1022PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1023{
14a5cf38
JH		 1024 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1025 f, PerlIOBase(f)->tab->name, iotype, mode,
1026 (names) ? names : "(Null)");
89aec743 1027 PerlIO_flush(f);
14a5cf38
JH		 1028 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1029 PerlIO *top = f;
1030 while (*top) {
1031 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 1032 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1033 break;
1034 }
1035 top = PerlIONext(top);
89aec743 1036 PerlIO_flush(top);
14a5cf38
JH		 1037 }
1038 }
1039 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 1040}
1041
1042#undef PerlIO__close
1043int
1044PerlIO__close(PerlIO *f)
1045{
14a5cf38
JH		 1046 if (f && *f)
1047 return (*PerlIOBase(f)->tab->Close) (f);
1048 else {
1049 SETERRNO(EBADF, SS$_IVCHAN);
1050 return -1;
1051 }
76ced9ad
NIS		 1052}
1053
5f1a76d0
NIS		 1054#undef PerlIO_fdupopen
1055PerlIO *
8cf8f3d1 1056PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
5f1a76d0 1057{
14a5cf38 1058 if (f && *f) {
8cf8f3d1 1059 PerlIO_funcs *tab = PerlIOBase(f)->tab;
a8fc9800
NIS		 1060 PerlIO *new;
1061 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
1062 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
14a5cf38
JH		 1063 return new;
1064 }
1065 else {
1066 SETERRNO(EBADF, SS$_IVCHAN);
1067 return NULL;
1068 }
5f1a76d0 1069}
f5b9d040 1070
b931b1d9
NIS		 1071#undef PerlIO_close
1072int
1073PerlIO_close(PerlIO *f)
1074{
14a5cf38
JH		 1075 dTHX;
1076 int code = -1;
1077 if (f && *f) {
1078 code = (*PerlIOBase(f)->tab->Close) (f);
1079 while (*f) {
1080 PerlIO_pop(aTHX_ f);
1081 }
f6c77cf1 1082 }
14a5cf38 1083 return code;
b931b1d9
NIS		 1084}
1085
1086#undef PerlIO_fileno
1087int
1088PerlIO_fileno(PerlIO *f)
1089{
14a5cf38
JH		 1090 if (f && *f)
1091 return (*PerlIOBase(f)->tab->Fileno) (f);
1092 else {
1093 SETERRNO(EBADF, SS$_IVCHAN);
1094 return -1;
1095 }
b931b1d9
NIS		 1096}
1097
1141d9f8
NIS		 1098static const char *
1099PerlIO_context_layers(pTHX_ const char *mode)
1100{
14a5cf38
JH		 1101 const char *type = NULL;
1102 /*
71200d45 1103 * Need to supply default layer info from open.pm
14a5cf38
JH		 1104 */
1105 if (PL_curcop) {
1106 SV *layers = PL_curcop->cop_io;
1107 if (layers) {
1108 STRLEN len;
1109 type = SvPV(layers, len);
1110 if (type && mode[0] != 'r') {
1111 /*
71200d45 1112 * Skip to write part
14a5cf38
JH		 1113 */
1114 const char *s = strchr(type, 0);
1115 if (s && (s - type) < len) {
1116 type = s + 1;
1117 }
1118 }
1119 }
1120 }
1121 return type;
1141d9f8
NIS		 1122}
1123
fcf2db38 1124static PerlIO_funcs *
2edd7e44
NIS		 1125PerlIO_layer_from_ref(pTHX_ SV *sv)
1126{
14a5cf38 1127 /*
71200d45 1128 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1129 */
1130 if (SvTYPE(sv) < SVt_PVAV)
1131 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1132
1133 /*
71200d45 1134 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1135 */
1136 switch (SvTYPE(sv)) {
1137 case SVt_PVAV:
1138 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1139 case SVt_PVHV:
1140 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1141 case SVt_PVCV:
1142 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1143 case SVt_PVGV:
1144 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1145 }
1146 return NULL;
2edd7e44
NIS		 1147}
1148
fcf2db38 1149PerlIO_list_t *
14a5cf38
JH		 1150PerlIO_resolve_layers(pTHX_ const char *layers,
1151 const char *mode, int narg, SV **args)
1152{
1153 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1154 int incdef = 1;
1155 if (!_perlio)
1156 PerlIO_stdstreams(aTHX);
1157 if (narg) {
1158 SV *arg = *args;
1159 /*
71200d45
NIS		 1160 * If it is a reference but not an object see if we have a handler
1161 * for it
14a5cf38
JH		 1162 */
1163 if (SvROK(arg) && !sv_isobject(arg)) {
1164 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1165 if (handler) {
1166 def = PerlIO_list_alloc();
1167 PerlIO_list_push(def, handler, &PL_sv_undef);
1168 incdef = 0;
1169 }
1170 /*
71200d45 1171 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1172 * something sensible else we will just stringfy and open
71200d45 1173 * resulting string.
14a5cf38
JH		 1174 */
1175 }
1176 }
1177 if (!layers)
1178 layers = PerlIO_context_layers(aTHX_ mode);
1179 if (layers && *layers) {
1180 PerlIO_list_t *av;
1181 if (incdef) {
1182 IV i = def->cur;
1183 av = PerlIO_list_alloc();
1184 for (i = 0; i < def->cur; i++) {
1185 PerlIO_list_push(av, def->array[i].funcs,
1186 def->array[i].arg);
1187 }
1188 }
1189 else {
1190 av = def;
1191 }
1192 PerlIO_parse_layers(aTHX_ av, layers);
1193 return av;
1194 }
1195 else {
1196 if (incdef)
1197 def->refcnt++;
1198 return def;
1199 }
ee518936
NIS		 1200}
1201
1202PerlIO *
14a5cf38
JH		 1203PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1204 int imode, int perm, PerlIO *f, int narg, SV **args)
1205{
1206 if (!f && narg == 1 && *args == &PL_sv_undef) {
1207 if ((f = PerlIO_tmpfile())) {
1208 if (!layers)
1209 layers = PerlIO_context_layers(aTHX_ mode);
1210 if (layers && *layers)
1211 PerlIO_apply_layers(aTHX_ f, mode, layers);
1212 }
1213 }
1214 else {
1215 PerlIO_list_t *layera = NULL;
1216 IV n;
1217 PerlIO_funcs *tab = NULL;
1218 if (f && *f) {
1219 /*
71200d45
NIS		 1220 * This is "reopen" - it is not tested as perl does not use it
1221 * yet
14a5cf38
JH		 1222 */
1223 PerlIOl *l = *f;
1224 layera = PerlIO_list_alloc();
1225 while (l) {
1226 SV *arg =
1227 (l->tab->Getarg) ? (*l->tab->
1228 Getarg) (&l) : &PL_sv_undef;
1229 PerlIO_list_push(layera, l->tab, arg);
1230 l = *PerlIONext(&l);
1231 }
1232 }
1233 else {
1234 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1235 }
1236 /*
71200d45 1237 * Start at "top" of layer stack
14a5cf38
JH		 1238 */
1239 n = layera->cur - 1;
1240 while (n >= 0) {
1241 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1242 if (t && t->Open) {
1243 tab = t;
1244 break;
1245 }
1246 n--;
1247 }
1248 if (tab) {
1249 /*
71200d45 1250 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1251 */
1252 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1253 tab->name, layers, mode, fd, imode, perm, f, narg,
1254 args);
1255 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1256 f, narg, args);
1257 if (f) {
1258 if (n + 1 < layera->cur) {
1259 /*
1260 * More layers above the one that we used to open -
71200d45 1261 * apply them now
14a5cf38
JH		 1262 */
1263 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1264 != 0) {
1265 f = NULL;
1266 }
1267 }
1268 }
1269 }
1270 PerlIO_list_free(layera);
1271 }
1272 return f;
ee518936 1273}
b931b1d9
NIS		 1274
1275
9e353e3b
NIS		 1276#undef PerlIO_fdopen
1277PerlIO *
1278PerlIO_fdopen(int fd, const char *mode)
1279{
14a5cf38
JH		 1280 dTHX;
1281 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1282}
1283
6f9d8c32
NIS		 1284#undef PerlIO_open
1285PerlIO *
1286PerlIO_open(const char *path, const char *mode)
1287{
14a5cf38
JH		 1288 dTHX;
1289 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1290 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1291}
1292
9e353e3b
NIS		 1293#undef PerlIO_reopen
1294PerlIO *
1295PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1296{
14a5cf38
JH		 1297 dTHX;
1298 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1299 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1300}
1301
9e353e3b
NIS		 1302#undef PerlIO_read
1303SSize_t
1304PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1305{
14a5cf38
JH		 1306 if (f && *f)
1307 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1308 else {
1309 SETERRNO(EBADF, SS$_IVCHAN);
1310 return -1;
1311 }
760ac839
LW		 1312}
1313
313ca112
NIS		 1314#undef PerlIO_unread
1315SSize_t
1316PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1317{
14a5cf38
JH		 1318 if (f && *f)
1319 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1320 else {
1321 SETERRNO(EBADF, SS$_IVCHAN);
1322 return -1;
1323 }
760ac839
LW		 1324}
1325
9e353e3b
NIS		 1326#undef PerlIO_write
1327SSize_t
1328PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1329{
14a5cf38
JH		 1330 if (f && *f)
1331 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1332 else {
1333 SETERRNO(EBADF, SS$_IVCHAN);
1334 return -1;
1335 }
760ac839
LW		 1336}
1337
9e353e3b 1338#undef PerlIO_seek
6f9d8c32 1339int
9e353e3b 1340PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1341{
14a5cf38
JH		 1342 if (f && *f)
1343 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1344 else {
1345 SETERRNO(EBADF, SS$_IVCHAN);
1346 return -1;
1347 }
760ac839
LW		 1348}
1349
9e353e3b
NIS		 1350#undef PerlIO_tell
1351Off_t
1352PerlIO_tell(PerlIO *f)
760ac839 1353{
14a5cf38
JH		 1354 if (f && *f)
1355 return (*PerlIOBase(f)->tab->Tell) (f);
1356 else {
1357 SETERRNO(EBADF, SS$_IVCHAN);
1358 return -1;
1359 }
760ac839
LW		 1360}
1361
9e353e3b 1362#undef PerlIO_flush
6f9d8c32 1363int
9e353e3b 1364PerlIO_flush(PerlIO *f)
760ac839 1365{
14a5cf38
JH		 1366 if (f) {
1367 if (*f) {
1368 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1369 if (tab && tab->Flush) {
1370 return (*tab->Flush) (f);
1371 }
1372 else {
1373 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1374 SETERRNO(EBADF, SS$_IVCHAN);
1375 return -1;
1376 }
1377 }
1378 else {
1379 PerlIO_debug("Cannot flush f=%p\n", f);
1380 SETERRNO(EBADF, SS$_IVCHAN);
1381 return -1;
1382 }
1383 }
1384 else {
1385 /*
1386 * Is it good API design to do flush-all on NULL, a potentially
1387 * errorneous input? Maybe some magical value (PerlIO*
1388 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1389 * things on fflush(NULL), but should we be bound by their design
71200d45 1390 * decisions? --jhi
14a5cf38
JH		 1391 */
1392 PerlIO **table = &_perlio;
1393 int code = 0;
1394 while ((f = *table)) {
1395 int i;
1396 table = (PerlIO **) (f++);
1397 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1398 if (*f && PerlIO_flush(f) != 0)
1399 code = -1;
1400 f++;
1401 }
1402 }
1403 return code;
1404 }
760ac839
LW		 1405}
1406
a9c883f6
NIS		 1407void
1408PerlIOBase_flush_linebuf()
1409{
14a5cf38
JH		 1410 PerlIO **table = &_perlio;
1411 PerlIO *f;
1412 while ((f = *table)) {
1413 int i;
1414 table = (PerlIO **) (f++);
1415 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1416 if (*f
1417 && (PerlIOBase(f)->
1418 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1419 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1420 PerlIO_flush(f);
1421 f++;
1422 }
a9c883f6 1423 }
a9c883f6
NIS		 1424}
1425
06da4f11
NIS		 1426#undef PerlIO_fill
1427int
1428PerlIO_fill(PerlIO *f)
1429{
14a5cf38
JH		 1430 if (f && *f)
1431 return (*PerlIOBase(f)->tab->Fill) (f);
1432 else {
1433 SETERRNO(EBADF, SS$_IVCHAN);
1434 return -1;
1435 }
06da4f11
NIS		 1436}
1437
f3862f8b
NIS		 1438#undef PerlIO_isutf8
1439int
1440PerlIO_isutf8(PerlIO *f)
1441{
14a5cf38
JH		 1442 if (f && *f)
1443 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1444 else {
1445 SETERRNO(EBADF, SS$_IVCHAN);
1446 return -1;
1447 }
f3862f8b
NIS		 1448}
1449
9e353e3b 1450#undef PerlIO_eof
6f9d8c32 1451int
9e353e3b 1452PerlIO_eof(PerlIO *f)
760ac839 1453{
14a5cf38
JH		 1454 if (f && *f)
1455 return (*PerlIOBase(f)->tab->Eof) (f);
1456 else {
1457 SETERRNO(EBADF, SS$_IVCHAN);
1458 return -1;
1459 }
9e353e3b
NIS		 1460}
1461
1462#undef PerlIO_error
1463int
1464PerlIO_error(PerlIO *f)
1465{
14a5cf38
JH		 1466 if (f && *f)
1467 return (*PerlIOBase(f)->tab->Error) (f);
1468 else {
1469 SETERRNO(EBADF, SS$_IVCHAN);
1470 return -1;
1471 }
9e353e3b
NIS		 1472}
1473
1474#undef PerlIO_clearerr
1475void
1476PerlIO_clearerr(PerlIO *f)
1477{
14a5cf38
JH		 1478 if (f && *f)
1479 (*PerlIOBase(f)->tab->Clearerr) (f);
1480 else
1481 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1482}
1483
1484#undef PerlIO_setlinebuf
1485void
1486PerlIO_setlinebuf(PerlIO *f)
1487{
14a5cf38
JH		 1488 if (f && *f)
1489 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1490 else
1491 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1492}
1493
1494#undef PerlIO_has_base
1495int
1496PerlIO_has_base(PerlIO *f)
1497{
14a5cf38
JH		 1498 if (f && *f) {
1499 return (PerlIOBase(f)->tab->Get_base != NULL);
1500 }
1501 return 0;
760ac839
LW		 1502}
1503
9e353e3b
NIS		 1504#undef PerlIO_fast_gets
1505int
1506PerlIO_fast_gets(PerlIO *f)
760ac839 1507{
14a5cf38
JH		 1508 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1509 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1510 return (tab->Set_ptrcnt != NULL);
1511 }
1512 return 0;
9e353e3b
NIS		 1513}
1514
1515#undef PerlIO_has_cntptr
1516int
1517PerlIO_has_cntptr(PerlIO *f)
1518{
14a5cf38
JH		 1519 if (f && *f) {
1520 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1521 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1522 }
1523 return 0;
9e353e3b
NIS		 1524}
1525
1526#undef PerlIO_canset_cnt
1527int
1528PerlIO_canset_cnt(PerlIO *f)
1529{
14a5cf38
JH		 1530 if (f && *f) {
1531 PerlIOl *l = PerlIOBase(f);
1532 return (l->tab->Set_ptrcnt != NULL);
1533 }
1534 return 0;
760ac839
LW		 1535}
1536
1537#undef PerlIO_get_base
888911fc 1538STDCHAR *
a20bf0c3 1539PerlIO_get_base(PerlIO *f)
760ac839 1540{
14a5cf38
JH		 1541 if (f && *f)
1542 return (*PerlIOBase(f)->tab->Get_base) (f);
1543 return NULL;
9e353e3b
NIS		 1544}
1545
1546#undef PerlIO_get_bufsiz
1547int
1548PerlIO_get_bufsiz(PerlIO *f)
1549{
14a5cf38
JH		 1550 if (f && *f)
1551 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1552 return 0;
9e353e3b
NIS		 1553}
1554
1555#undef PerlIO_get_ptr
1556STDCHAR *
1557PerlIO_get_ptr(PerlIO *f)
1558{
14a5cf38
JH		 1559 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1560 if (tab->Get_ptr == NULL)
1561 return NULL;
1562 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1563}
1564
1565#undef PerlIO_get_cnt
05d1247b 1566int
9e353e3b
NIS		 1567PerlIO_get_cnt(PerlIO *f)
1568{
14a5cf38
JH		 1569 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1570 if (tab->Get_cnt == NULL)
1571 return 0;
1572 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1573}
1574
1575#undef PerlIO_set_cnt
1576void
14a5cf38 1577PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1578{
14a5cf38 1579 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1580}
1581
1582#undef PerlIO_set_ptrcnt
1583void
14a5cf38 1584PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1585{
14a5cf38
JH		 1586 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1587 if (tab->Set_ptrcnt == NULL) {
1588 dTHX;
1589 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1590 }
1591 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1592}
1593
1594/*--------------------------------------------------------------------------------------*/
14a5cf38 1595/*
71200d45 1596 * utf8 and raw dummy layers
14a5cf38 1597 */
dfebf958 1598
26fb694e 1599IV
e3f3bf95 1600PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1601{
14a5cf38
JH		 1602 if (PerlIONext(f)) {
1603 dTHX;
1604 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1605 PerlIO_pop(aTHX_ f);
1606 if (tab->kind & PERLIO_K_UTF8)
1607 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1608 else
1609 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1610 return 0;
1611 }
1612 return -1;
26fb694e
NIS		 1613}
1614
dfebf958 1615PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1616 "utf8",
1617 sizeof(PerlIOl),
1618 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1619 PerlIOUtf8_pushed,
1620 NULL,
1621 NULL,
1622 NULL,
1623 NULL,
1624 NULL,
1625 NULL,
1626 NULL,
1627 NULL,
1628 NULL,
1629 NULL,
1630 NULL, /* flush */
1631 NULL, /* fill */
1632 NULL,
1633 NULL,
1634 NULL,
1635 NULL,
1636 NULL, /* get_base */
1637 NULL, /* get_bufsiz */
1638 NULL, /* get_ptr */
1639 NULL, /* get_cnt */
1640 NULL, /* set_ptrcnt */
26fb694e
NIS		 1641};
1642
1643PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1644 "bytes",
1645 sizeof(PerlIOl),
1646 PERLIO_K_DUMMY,
1647 PerlIOUtf8_pushed,
1648 NULL,
1649 NULL,
1650 NULL,
1651 NULL,
1652 NULL,
1653 NULL,
1654 NULL,
1655 NULL,
1656 NULL,
1657 NULL,
1658 NULL, /* flush */
1659 NULL, /* fill */
1660 NULL,
1661 NULL,
1662 NULL,
1663 NULL,
1664 NULL, /* get_base */
1665 NULL, /* get_bufsiz */
1666 NULL, /* get_ptr */
1667 NULL, /* get_cnt */
1668 NULL, /* set_ptrcnt */
dfebf958
NIS		 1669};
1670
1671PerlIO *
14a5cf38
JH		 1672PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1673 IV n, const char *mode, int fd, int imode, int perm,
1674 PerlIO *old, int narg, SV **args)
dfebf958 1675{
14a5cf38
JH		 1676 PerlIO_funcs *tab = PerlIO_default_btm();
1677 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1678 old, narg, args);
dfebf958
NIS		 1679}
1680
1681PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1682 "raw",
1683 sizeof(PerlIOl),
1684 PERLIO_K_DUMMY,
1685 PerlIORaw_pushed,
1686 PerlIOBase_popped,
1687 PerlIORaw_open,
1688 NULL,
1689 NULL,
1690 NULL,
1691 NULL,
1692 NULL,
1693 NULL,
1694 NULL,
1695 NULL,
1696 NULL, /* flush */
1697 NULL, /* fill */
1698 NULL,
1699 NULL,
1700 NULL,
1701 NULL,
1702 NULL, /* get_base */
1703 NULL, /* get_bufsiz */
1704 NULL, /* get_ptr */
1705 NULL, /* get_cnt */
1706 NULL, /* set_ptrcnt */
dfebf958
NIS		 1707};
1708/*--------------------------------------------------------------------------------------*/
1709/*--------------------------------------------------------------------------------------*/
14a5cf38 1710/*
71200d45 1711 * "Methods" of the "base class"
14a5cf38 1712 */
9e353e3b
NIS		 1713
1714IV
1715PerlIOBase_fileno(PerlIO *f)
1716{
14a5cf38 1717 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1718}
1719
f5b9d040 1720char *
14a5cf38
JH		 1721PerlIO_modestr(PerlIO *f, char *buf)
1722{
1723 char *s = buf;
1724 IV flags = PerlIOBase(f)->flags;
1725 if (flags & PERLIO_F_APPEND) {
1726 *s++ = 'a';
1727 if (flags & PERLIO_F_CANREAD) {
1728 *s++ = '+';
1729 }
1730 }
1731 else if (flags & PERLIO_F_CANREAD) {
1732 *s++ = 'r';
1733 if (flags & PERLIO_F_CANWRITE)
1734 *s++ = '+';
1735 }
1736 else if (flags & PERLIO_F_CANWRITE) {
1737 *s++ = 'w';
1738 if (flags & PERLIO_F_CANREAD) {
1739 *s++ = '+';
1740 }
1741 }
5f1a76d0 1742#if O_TEXT != O_BINARY
14a5cf38
JH		 1743 if (!(flags & PERLIO_F_CRLF))
1744 *s++ = 'b';
5f1a76d0 1745#endif
14a5cf38
JH		 1746 *s = '\0';
1747 return buf;
f5b9d040
NIS		 1748}
1749
76ced9ad 1750IV
e3f3bf95 1751PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1752{
14a5cf38 1753 PerlIOl *l = PerlIOBase(f);
b7953727 1754#if 0
14a5cf38
JH		 1755 const char *omode = mode;
1756 char temp[8];
b7953727 1757#endif
14a5cf38
JH		 1758 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1759 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1760 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1761 if (tab->Set_ptrcnt != NULL)
1762 l->flags |= PERLIO_F_FASTGETS;
1763 if (mode) {
1764 if (*mode == '#' || *mode == 'I')
1765 mode++;
1766 switch (*mode++) {
1767 case 'r':
1768 l->flags |= PERLIO_F_CANREAD;
1769 break;
1770 case 'a':
1771 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1772 break;
1773 case 'w':
1774 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1775 break;
1776 default:
1777 SETERRNO(EINVAL, LIB$_INVARG);
1778 return -1;
1779 }
1780 while (*mode) {
1781 switch (*mode++) {
1782 case '+':
1783 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1784 break;
1785 case 'b':
1786 l->flags &= ~PERLIO_F_CRLF;
1787 break;
1788 case 't':
1789 l->flags |= PERLIO_F_CRLF;
1790 break;
1791 default:
1792 SETERRNO(EINVAL, LIB$_INVARG);
1793 return -1;
1794 }
1795 }
1796 }
1797 else {
1798 if (l->next) {
1799 l->flags |= l->next->flags &
1800 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1801 PERLIO_F_APPEND);
1802 }
1803 }
5e2ab84b 1804#if 0
14a5cf38
JH		 1805 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1806 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1807 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1808#endif
14a5cf38 1809 return 0;
76ced9ad
NIS		 1810}
1811
1812IV
1813PerlIOBase_popped(PerlIO *f)
1814{
14a5cf38 1815 return 0;
760ac839
LW		 1816}
1817
9e353e3b
NIS		 1818SSize_t
1819PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1820{
14a5cf38
JH		 1821 dTHX;
1822 /*
71200d45 1823 * Save the position as current head considers it
14a5cf38
JH		 1824 */
1825 Off_t old = PerlIO_tell(f);
1826 SSize_t done;
1827 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1828 PerlIOSelf(f, PerlIOBuf)->posn = old;
1829 done = PerlIOBuf_unread(f, vbuf, count);
1830 return done;
9e353e3b
NIS		 1831}
1832
f6c77cf1
NIS		 1833SSize_t
1834PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1835{
14a5cf38
JH		 1836 STDCHAR *buf = (STDCHAR *) vbuf;
1837 if (f) {
1838 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1839 return 0;
1840 while (count > 0) {
1841 SSize_t avail = PerlIO_get_cnt(f);
1842 SSize_t take = 0;
1843 if (avail > 0)
1844 take = (count < avail) ? count : avail;
1845 if (take > 0) {
1846 STDCHAR *ptr = PerlIO_get_ptr(f);
1847 Copy(ptr, buf, take, STDCHAR);
1848 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1849 count -= take;
1850 buf += take;
1851 }
1852 if (count > 0 && avail <= 0) {
1853 if (PerlIO_fill(f) != 0)
1854 break;
1855 }
1856 }
1857 return (buf - (STDCHAR *) vbuf);
1858 }
f6c77cf1 1859 return 0;
f6c77cf1
NIS		 1860}
1861
9e353e3b 1862IV
06da4f11 1863PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1864{
14a5cf38 1865 return 0;
9e353e3b
NIS		 1866}
1867
1868IV
06da4f11
NIS		 1869PerlIOBase_noop_fail(PerlIO *f)
1870{
14a5cf38 1871 return -1;
06da4f11
NIS		 1872}
1873
1874IV
9e353e3b
NIS		 1875PerlIOBase_close(PerlIO *f)
1876{
14a5cf38
JH		 1877 IV code = 0;
1878 PerlIO *n = PerlIONext(f);
1879 if (PerlIO_flush(f) != 0)
1880 code = -1;
1881 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1882 code = -1;
1883 PerlIOBase(f)->flags &=
1884 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1885 return code;
9e353e3b
NIS		 1886}
1887
1888IV
1889PerlIOBase_eof(PerlIO *f)
1890{
14a5cf38
JH		 1891 if (f && *f) {
1892 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1893 }
1894 return 1;
9e353e3b
NIS		 1895}
1896
1897IV
1898PerlIOBase_error(PerlIO *f)
1899{
14a5cf38
JH		 1900 if (f && *f) {
1901 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1902 }
1903 return 1;
9e353e3b
NIS		 1904}
1905
1906void
1907PerlIOBase_clearerr(PerlIO *f)
1908{
14a5cf38
JH		 1909 if (f && *f) {
1910 PerlIO *n = PerlIONext(f);
1911 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1912 if (n)
1913 PerlIO_clearerr(n);
1914 }
9e353e3b
NIS		 1915}
1916
1917void
1918PerlIOBase_setlinebuf(PerlIO *f)
1919{
14a5cf38
JH		 1920 if (f) {
1921 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1922 }
9e353e3b
NIS		 1923}
1924
9e353e3b 1925/*--------------------------------------------------------------------------------------*/
14a5cf38 1926/*
71200d45 1927 * Bottom-most level for UNIX-like case
14a5cf38 1928 */
9e353e3b 1929
14a5cf38
JH		 1930typedef struct {
1931 struct _PerlIO base; /* The generic part */
1932 int fd; /* UNIX like file descriptor */
1933 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 1934} PerlIOUnix;
1935
6f9d8c32 1936int
9e353e3b 1937PerlIOUnix_oflags(const char *mode)
760ac839 1938{
14a5cf38
JH		 1939 int oflags = -1;
1940 if (*mode == 'I' || *mode == '#')
1941 mode++;
1942 switch (*mode) {
1943 case 'r':
1944 oflags = O_RDONLY;
1945 if (*++mode == '+') {
1946 oflags = O_RDWR;
1947 mode++;
1948 }
1949 break;
1950
1951 case 'w':
1952 oflags = O_CREAT | O_TRUNC;
1953 if (*++mode == '+') {
1954 oflags |= O_RDWR;
1955 mode++;
1956 }
1957 else
1958 oflags |= O_WRONLY;
1959 break;
1960
1961 case 'a':
1962 oflags = O_CREAT | O_APPEND;
1963 if (*++mode == '+') {
1964 oflags |= O_RDWR;
1965 mode++;
1966 }
1967 else
1968 oflags |= O_WRONLY;
1969 break;
1970 }
1971 if (*mode == 'b') {
1972 oflags |= O_BINARY;
1973 oflags &= ~O_TEXT;
1974 mode++;
1975 }
1976 else if (*mode == 't') {
1977 oflags |= O_TEXT;
1978 oflags &= ~O_BINARY;
1979 mode++;
1980 }
1981 /*
71200d45 1982 * Always open in binary mode
14a5cf38
JH		 1983 */
1984 oflags |= O_BINARY;
1985 if (*mode || oflags == -1) {
1986 SETERRNO(EINVAL, LIB$_INVARG);
1987 oflags = -1;
1988 }
1989 return oflags;
9e353e3b
NIS		 1990}
1991
1992IV
1993PerlIOUnix_fileno(PerlIO *f)
1994{
14a5cf38 1995 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 1996}
1997
4b803d04 1998IV
e3f3bf95 1999PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2000{
14a5cf38
JH		 2001 IV code = PerlIOBase_pushed(f, mode, arg);
2002 if (*PerlIONext(f)) {
2003 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2004 s->fd = PerlIO_fileno(PerlIONext(f));
2005 /*
71200d45 2006 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2007 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2008 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2009 */
2010 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2011 }
2012 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2013 return code;
4b803d04
NIS		 2014}
2015
9e353e3b 2016PerlIO *
14a5cf38
JH		 2017PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2018 IV n, const char *mode, int fd, int imode,
2019 int perm, PerlIO *f, int narg, SV **args)
2020{
2021 if (f) {
2022 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2023 (*PerlIOBase(f)->tab->Close) (f);
2024 }
2025 if (narg > 0) {
2026 char *path = SvPV_nolen(*args);
2027 if (*mode == '#')
2028 mode++;
2029 else {
2030 imode = PerlIOUnix_oflags(mode);
2031 perm = 0666;
2032 }
2033 if (imode != -1) {
2034 fd = PerlLIO_open3(path, imode, perm);
2035 }
2036 }
2037 if (fd >= 0) {
2038 PerlIOUnix *s;
2039 if (*mode == 'I')
2040 mode++;
2041 if (!f) {
2042 f = PerlIO_allocate(aTHX);
2043 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2044 PerlIOUnix);
2045 }
2046 else
2047 s = PerlIOSelf(f, PerlIOUnix);
2048 s->fd = fd;
2049 s->oflags = imode;
2050 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2051 return f;
2052 }
2053 else {
2054 if (f) {
2055 /*
71200d45 2056 * FIXME: pop layers ???
14a5cf38
JH		 2057 */
2058 }
2059 return NULL;
2060 }
9e353e3b
NIS		 2061}
2062
8cf8f3d1
NIS		 2063SV *
2064PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
71200d45 2065{
8cf8f3d1
NIS		 2066 if (!arg)
2067 return Nullsv;
71200d45 2068#ifdef sv_dup
8cf8f3d1
NIS		 2069 if (param) {
2070 return sv_dup(arg, param);
2071 }
2072 else {
2073 return newSVsv(arg);
2074 }
2075#else
2076 return newSVsv(arg);
71200d45 2077#endif
8cf8f3d1
NIS		 2078}
2079
2080PerlIO *
2081PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2082{
2083 PerlIO *nexto = PerlIONext(o);
2084 if (*nexto) {
2085 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2086 f = (*tab->Dup)(aTHX_ f, nexto, param);
71200d45 2087 }
8cf8f3d1
NIS		 2088 if (f) {
2089 PerlIO_funcs *self = PerlIOBase(o)->tab;
2090 SV *arg = Nullsv;
2091 char buf[8];
b77c74bc 2092 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
8cf8f3d1
NIS		 2093 if (self->Getarg) {
2094 arg = (*self->Getarg)(o);
2095 if (arg) {
2096 arg = PerlIO_sv_dup(aTHX_ arg, param);
2097 }
2098 }
2099 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2100 if (!f && arg) {
2101 SvREFCNT_dec(arg);
2102 }
71200d45 2103 }
71200d45
NIS		 2104 return f;
2105}
2106
2107PerlIO *
8cf8f3d1 2108PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2109{
2110 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2111 int fd = PerlLIO_dup(os->fd);
2112 if (fd >= 0) {
2113 f = PerlIOBase_dup(aTHX_ f, o, param);
2114 if (f) {
2115 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2116 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2117 s->fd = fd;
2118 return f;
2119 }
2120 else {
2121 PerlLIO_close(fd);
2122 }
2123 }
2124 return NULL;
2125}
2126
2127
9e353e3b
NIS		 2128SSize_t
2129PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2130{
14a5cf38
JH		 2131 dTHX;
2132 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2133 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2134 return 0;
2135 while (1) {
2136 SSize_t len = PerlLIO_read(fd, vbuf, count);
2137 if (len >= 0 || errno != EINTR) {
2138 if (len < 0)
2139 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2140 else if (len == 0 && count != 0)
2141 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2142 return len;
2143 }
2144 PERL_ASYNC_CHECK();
2145 }
9e353e3b
NIS		 2146}
2147
2148SSize_t
2149PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2150{
14a5cf38
JH		 2151 dTHX;
2152 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2153 while (1) {
2154 SSize_t len = PerlLIO_write(fd, vbuf, count);
2155 if (len >= 0 || errno != EINTR) {
2156 if (len < 0)
2157 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2158 return len;
2159 }
2160 PERL_ASYNC_CHECK();
06da4f11 2161 }
9e353e3b
NIS		 2162}
2163
2164IV
2165PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2166{
14a5cf38
JH		 2167 dSYS;
2168 Off_t new =
2169 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2170 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2171 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2172}
2173
2174Off_t
2175PerlIOUnix_tell(PerlIO *f)
2176{
14a5cf38
JH		 2177 dSYS;
2178 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2179}
2180
71200d45 2181
9e353e3b
NIS		 2182IV
2183PerlIOUnix_close(PerlIO *f)
2184{
14a5cf38
JH		 2185 dTHX;
2186 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2187 int code = 0;
2188 while (PerlLIO_close(fd) != 0) {
2189 if (errno != EINTR) {
2190 code = -1;
2191 break;
2192 }
2193 PERL_ASYNC_CHECK();
2194 }
2195 if (code == 0) {
2196 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2197 }
2198 return code;
9e353e3b
NIS		 2199}
2200
2201PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2202 "unix",
2203 sizeof(PerlIOUnix),
2204 PERLIO_K_RAW,
2205 PerlIOUnix_pushed,
2206 PerlIOBase_noop_ok,
2207 PerlIOUnix_open,
2208 NULL,
2209 PerlIOUnix_fileno,
71200d45 2210 PerlIOUnix_dup,
14a5cf38
JH		 2211 PerlIOUnix_read,
2212 PerlIOBase_unread,
2213 PerlIOUnix_write,
2214 PerlIOUnix_seek,
2215 PerlIOUnix_tell,
2216 PerlIOUnix_close,
2217 PerlIOBase_noop_ok, /* flush */
2218 PerlIOBase_noop_fail, /* fill */
2219 PerlIOBase_eof,
2220 PerlIOBase_error,
2221 PerlIOBase_clearerr,
2222 PerlIOBase_setlinebuf,
2223 NULL, /* get_base */
2224 NULL, /* get_bufsiz */
2225 NULL, /* get_ptr */
2226 NULL, /* get_cnt */
2227 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2228};
2229
2230/*--------------------------------------------------------------------------------------*/
14a5cf38 2231/*
71200d45 2232 * stdio as a layer
14a5cf38 2233 */
9e353e3b 2234
14a5cf38
JH		 2235typedef struct {
2236 struct _PerlIO base;
2237 FILE *stdio; /* The stream */
9e353e3b
NIS		 2238} PerlIOStdio;
2239
2240IV
2241PerlIOStdio_fileno(PerlIO *f)
2242{
14a5cf38
JH		 2243 dSYS;
2244 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2245}
2246
766a733e 2247char *
14a5cf38
JH		 2248PerlIOStdio_mode(const char *mode, char *tmode)
2249{
2250 char *ret = tmode;
2251 while (*mode) {
2252 *tmode++ = *mode++;
2253 }
2254 if (O_BINARY != O_TEXT) {
2255 *tmode++ = 'b';
2256 }
2257 *tmode = '\0';
2258 return ret;
2259}
2260
2261/*
71200d45 2262 * This isn't used yet ...
14a5cf38 2263 */
4b803d04 2264IV
e3f3bf95 2265PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2266{
14a5cf38
JH		 2267 if (*PerlIONext(f)) {
2268 dSYS;
2269 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2270 char tmode[8];
2271 FILE *stdio =
2272 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2273 PerlIOStdio_mode(mode, tmode));
2274 if (stdio)
2275 s->stdio = stdio;
2276 else
2277 return -1;
2278 }
2279 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2280}
2281
9e353e3b
NIS		 2282#undef PerlIO_importFILE
2283PerlIO *
2284PerlIO_importFILE(FILE *stdio, int fl)
2285{
14a5cf38
JH		 2286 dTHX;
2287 PerlIO *f = NULL;
2288 if (stdio) {
2289 PerlIOStdio *s =
2290 PerlIOSelf(PerlIO_push
2291 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2292 "r+", Nullsv), PerlIOStdio);
2293 s->stdio = stdio;
2294 }
2295 return f;
9e353e3b
NIS		 2296}
2297
2298PerlIO *
14a5cf38
JH		 2299PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2300 IV n, const char *mode, int fd, int imode,
2301 int perm, PerlIO *f, int narg, SV **args)
2302{
2303 char tmode[8];
2304 if (f) {
2305 char *path = SvPV_nolen(*args);
2306 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2307 FILE *stdio =
2308 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2309 s->stdio);
2310 if (!s->stdio)
2311 return NULL;
2312 s->stdio = stdio;
2313 return f;
2314 }
2315 else {
2316 if (narg > 0) {
2317 char *path = SvPV_nolen(*args);
2318 if (*mode == '#') {
2319 mode++;
2320 fd = PerlLIO_open3(path, imode, perm);
2321 }
2322 else {
2323 FILE *stdio = PerlSIO_fopen(path, mode);
2324 if (stdio) {
2325 PerlIOStdio *s =
2326 PerlIOSelf(PerlIO_push
2327 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2328 (mode = PerlIOStdio_mode(mode, tmode)),
2329 PerlIOArg),
2330 PerlIOStdio);
2331 s->stdio = stdio;
2332 }
2333 return f;
2334 }
2335 }
2336 if (fd >= 0) {
2337 FILE *stdio = NULL;
2338 int init = 0;
2339 if (*mode == 'I') {
2340 init = 1;
2341 mode++;
2342 }
2343 if (init) {
2344 switch (fd) {
2345 case 0:
2346 stdio = PerlSIO_stdin;
2347 break;
2348 case 1:
2349 stdio = PerlSIO_stdout;
2350 break;
2351 case 2:
2352 stdio = PerlSIO_stderr;
2353 break;
2354 }
2355 }
2356 else {
2357 stdio = PerlSIO_fdopen(fd, mode =
2358 PerlIOStdio_mode(mode, tmode));
2359 }
2360 if (stdio) {
2361 PerlIOStdio *s =
2362 PerlIOSelf(PerlIO_push
2363 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2364 mode, PerlIOArg), PerlIOStdio);
2365 s->stdio = stdio;
2366 return f;
2367 }
2368 }
2369 }
ee518936 2370 return NULL;
9e353e3b
NIS		 2371}
2372
2373SSize_t
2374PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2375{
14a5cf38
JH		 2376 dSYS;
2377 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2378 SSize_t got = 0;
2379 if (count == 1) {
2380 STDCHAR *buf = (STDCHAR *) vbuf;
2381 /*
2382 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2383 * stdio does not do that for fread()
14a5cf38
JH		 2384 */
2385 int ch = PerlSIO_fgetc(s);
2386 if (ch != EOF) {
2387 *buf = ch;
2388 got = 1;
2389 }
2390 }
2391 else
2392 got = PerlSIO_fread(vbuf, 1, count, s);
2393 return got;
9e353e3b
NIS		 2394}
2395
2396SSize_t
2397PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2398{
14a5cf38
JH		 2399 dSYS;
2400 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2401 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2402 SSize_t unread = 0;
2403 while (count > 0) {
2404 int ch = *buf-- & 0xff;
2405 if (PerlSIO_ungetc(ch, s) != ch)
2406 break;
2407 unread++;
2408 count--;
2409 }
2410 return unread;
9e353e3b
NIS		 2411}
2412
2413SSize_t
2414PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2415{
14a5cf38
JH		 2416 dSYS;
2417 return PerlSIO_fwrite(vbuf, 1, count,
2418 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2419}
2420
2421IV
2422PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2423{
14a5cf38
JH		 2424 dSYS;
2425 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2426 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2427}
2428
2429Off_t
2430PerlIOStdio_tell(PerlIO *f)
2431{
14a5cf38
JH		 2432 dSYS;
2433 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2434 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2435}
2436
2437IV
2438PerlIOStdio_close(PerlIO *f)
2439{
14a5cf38 2440 dSYS;
af130d45 2441#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2442 int optval;
2443 Sock_size_t optlen = sizeof(int);
8e4bc33b 2444#endif
14a5cf38
JH		 2445 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2446 return (
af130d45 2447#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2448 (getsockopt
2449 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2450 &optlen) <
2451 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2452#else
14a5cf38 2453 PerlSIO_fclose(stdio)
8e4bc33b 2454#endif
14a5cf38 2455 );
8e4bc33b 2456
9e353e3b
NIS		 2457}
2458
2459IV
2460PerlIOStdio_flush(PerlIO *f)
2461{
14a5cf38
JH		 2462 dSYS;
2463 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2464 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2465 return PerlSIO_fflush(stdio);
2466 }
2467 else {
88b61e10 2468#if 0
14a5cf38
JH		 2469 /*
2470 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2471 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2472 * design is to do _this_ but not have layer above flush this
71200d45 2473 * layer read-to-read
14a5cf38
JH		 2474 */
2475 /*
71200d45 2476 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2477 */
2478 int err = errno;
2479 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2480 errno = err;
88b61e10 2481#endif
14a5cf38
JH		 2482 }
2483 return 0;
9e353e3b
NIS		 2484}
2485
2486IV
06da4f11
NIS		 2487PerlIOStdio_fill(PerlIO *f)
2488{
14a5cf38
JH		 2489 dSYS;
2490 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2491 int c;
2492 /*
71200d45 2493 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2494 */
2495 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2496 if (PerlSIO_fflush(stdio) != 0)
2497 return EOF;
2498 }
2499 c = PerlSIO_fgetc(stdio);
2500 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2501 return EOF;
2502 return 0;
06da4f11
NIS		 2503}
2504
2505IV
9e353e3b
NIS		 2506PerlIOStdio_eof(PerlIO *f)
2507{
14a5cf38
JH		 2508 dSYS;
2509 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2510}
2511
2512IV
2513PerlIOStdio_error(PerlIO *f)
2514{
14a5cf38
JH		 2515 dSYS;
2516 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2517}
2518
2519void
2520PerlIOStdio_clearerr(PerlIO *f)
2521{
14a5cf38
JH		 2522 dSYS;
2523 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2524}
2525
2526void
2527PerlIOStdio_setlinebuf(PerlIO *f)
2528{
14a5cf38 2529 dSYS;
9e353e3b 2530#ifdef HAS_SETLINEBUF
14a5cf38 2531 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2532#else
14a5cf38 2533 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2534#endif
2535}
2536
2537#ifdef FILE_base
2538STDCHAR *
2539PerlIOStdio_get_base(PerlIO *f)
2540{
14a5cf38
JH		 2541 dSYS;
2542 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2543 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2544}
2545
2546Size_t
2547PerlIOStdio_get_bufsiz(PerlIO *f)
2548{
14a5cf38
JH		 2549 dSYS;
2550 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2551 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2552}
2553#endif
2554
2555#ifdef USE_STDIO_PTR
2556STDCHAR *
2557PerlIOStdio_get_ptr(PerlIO *f)
2558{
14a5cf38
JH		 2559 dSYS;
2560 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2561 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2562}
2563
2564SSize_t
2565PerlIOStdio_get_cnt(PerlIO *f)
2566{
14a5cf38
JH		 2567 dSYS;
2568 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2569 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2570}
2571
2572void
14a5cf38 2573PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2574{
14a5cf38
JH		 2575 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2576 dSYS;
2577 if (ptr != NULL) {
9e353e3b 2578#ifdef STDIO_PTR_LVALUE
14a5cf38 2579 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2580#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2581 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2582 dTHX;
2583 assert(PerlSIO_get_cnt(stdio) == (cnt));
2584 }
9e353e3b
NIS		 2585#endif
2586#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2587 /*
71200d45 2588 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2589 */
2590 return;
9e353e3b 2591#endif
14a5cf38
JH		 2592#else /* STDIO_PTR_LVALUE */
2593 PerlProc_abort();
2594#endif /* STDIO_PTR_LVALUE */
2595 }
2596 /*
71200d45 2597 * Now (or only) set cnt
14a5cf38 2598 */
9e353e3b 2599#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2600 PerlSIO_set_cnt(stdio, cnt);
2601#else /* STDIO_CNT_LVALUE */
9e353e3b 2602#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2603 PerlSIO_set_ptr(stdio,
2604 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2605 cnt));
2606#else /* STDIO_PTR_LVAL_SETS_CNT */
2607 PerlProc_abort();
2608#endif /* STDIO_PTR_LVAL_SETS_CNT */
2609#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2610}
2611
2612#endif
2613
71200d45 2614PerlIO *
8cf8f3d1 2615PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 2616{
b77c74bc
NIS		 2617 /* This assumes no layers underneath - which is what
2618 happens, but is not how I remember it. NI-S 2001/10/16
2619 */
2620 int fd = PerlLIO_dup(PerlIO_fileno(o));
2621 if (fd >= 0) {
2622 char buf[8];
2623 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2624 if (stdio) {
2625 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2626 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2627 }
2628 else {
2629 PerlSIO_fclose(stdio);
2630 }
2631 }
2632 else {
2633 PerlLIO_close(fd);
2634 f = NULL;
2635 }
2636 }
2637 return f;
71200d45
NIS		 2638}
2639
9e353e3b 2640PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2641 "stdio",
2642 sizeof(PerlIOStdio),
2643 PERLIO_K_BUFFERED,
2644 PerlIOBase_pushed,
2645 PerlIOBase_noop_ok,
2646 PerlIOStdio_open,
2647 NULL,
2648 PerlIOStdio_fileno,
71200d45 2649 PerlIOStdio_dup,
14a5cf38
JH		 2650 PerlIOStdio_read,
2651 PerlIOStdio_unread,
2652 PerlIOStdio_write,
2653 PerlIOStdio_seek,
2654 PerlIOStdio_tell,
2655 PerlIOStdio_close,
2656 PerlIOStdio_flush,
2657 PerlIOStdio_fill,
2658 PerlIOStdio_eof,
2659 PerlIOStdio_error,
2660 PerlIOStdio_clearerr,
2661 PerlIOStdio_setlinebuf,
9e353e3b 2662#ifdef FILE_base
14a5cf38
JH		 2663 PerlIOStdio_get_base,
2664 PerlIOStdio_get_bufsiz,
9e353e3b 2665#else
14a5cf38
JH		 2666 NULL,
2667 NULL,
9e353e3b
NIS		 2668#endif
2669#ifdef USE_STDIO_PTR
14a5cf38
JH		 2670 PerlIOStdio_get_ptr,
2671 PerlIOStdio_get_cnt,
0eb1d8a4 2672#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2673 PerlIOStdio_set_ptrcnt
2674#else /* STDIO_PTR_LVALUE */
2675 NULL
2676#endif /* STDIO_PTR_LVALUE */
2677#else /* USE_STDIO_PTR */
2678 NULL,
2679 NULL,
2680 NULL
2681#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2682};
2683
2684#undef PerlIO_exportFILE
2685FILE *
2686PerlIO_exportFILE(PerlIO *f, int fl)
2687{
14a5cf38
JH		 2688 FILE *stdio;
2689 PerlIO_flush(f);
2690 stdio = fdopen(PerlIO_fileno(f), "r+");
2691 if (stdio) {
2692 dTHX;
2693 PerlIOStdio *s =
2694 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2695 PerlIOStdio);
2696 s->stdio = stdio;
2697 }
2698 return stdio;
9e353e3b
NIS		 2699}
2700
2701#undef PerlIO_findFILE
2702FILE *
2703PerlIO_findFILE(PerlIO *f)
2704{
14a5cf38
JH		 2705 PerlIOl *l = *f;
2706 while (l) {
2707 if (l->tab == &PerlIO_stdio) {
2708 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2709 return s->stdio;
2710 }
2711 l = *PerlIONext(&l);
f7e7eb72 2712 }
14a5cf38 2713 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2714}
2715
2716#undef PerlIO_releaseFILE
2717void
2718PerlIO_releaseFILE(PerlIO *p, FILE *f)
2719{
2720}
2721
2722/*--------------------------------------------------------------------------------------*/
14a5cf38 2723/*
71200d45 2724 * perlio buffer layer
14a5cf38 2725 */
9e353e3b 2726
5e2ab84b 2727IV
e3f3bf95 2728PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2729{
14a5cf38
JH		 2730 dSYS;
2731 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2732 int fd = PerlIO_fileno(f);
2733 Off_t posn;
2734 if (fd >= 0 && PerlLIO_isatty(fd)) {
2735 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2736 }
2737 posn = PerlIO_tell(PerlIONext(f));
2738 if (posn != (Off_t) - 1) {
2739 b->posn = posn;
2740 }
2741 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2742}
2743
9e353e3b 2744PerlIO *
14a5cf38
JH		 2745PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2746 IV n, const char *mode, int fd, int imode, int perm,
2747 PerlIO *f, int narg, SV **args)
2748{
2749 if (f) {
2750 PerlIO *next = PerlIONext(f);
2751 PerlIO_funcs *tab =
2752 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2753 next =
2754 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2755 next, narg, args);
2756 if (!next
2757 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2758 return NULL;
2759 }
2760 }
2761 else {
2762 PerlIO_funcs *tab =
2763 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2764 int init = 0;
2765 if (*mode == 'I') {
2766 init = 1;
2767 /*
71200d45 2768 * mode++;
14a5cf38
JH		 2769 */
2770 }
2771 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2772 NULL, narg, args);
2773 if (f) {
2774 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2775 fd = PerlIO_fileno(f);
ee518936 2776#if O_BINARY != O_TEXT
14a5cf38 2777 /*
71200d45 2778 * do something about failing setmode()? --jhi
14a5cf38
JH		 2779 */
2780 PerlLIO_setmode(fd, O_BINARY);
ee518936 2781#endif
14a5cf38
JH		 2782 if (init && fd == 2) {
2783 /*
71200d45 2784 * Initial stderr is unbuffered
14a5cf38
JH		 2785 */
2786 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2787 }
2788 }
ee518936 2789 }
14a5cf38 2790 return f;
9e353e3b
NIS		 2791}
2792
14a5cf38
JH		 2793/*
2794 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2795 * read or write state
14a5cf38 2796 */
9e353e3b
NIS		 2797IV
2798PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2799{
14a5cf38
JH		 2800 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2801 int code = 0;
2802 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2803 /*
71200d45 2804 * write() the buffer
14a5cf38
JH		 2805 */
2806 STDCHAR *buf = b->buf;
2807 STDCHAR *p = buf;
2808 PerlIO *n = PerlIONext(f);
2809 while (p < b->ptr) {
2810 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2811 if (count > 0) {
2812 p += count;
2813 }
2814 else if (count < 0 || PerlIO_error(n)) {
2815 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2816 code = -1;
2817 break;
2818 }
2819 }
2820 b->posn += (p - buf);
2821 }
2822 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2823 STDCHAR *buf = PerlIO_get_base(f);
2824 /*
71200d45 2825 * Note position change
14a5cf38
JH		 2826 */
2827 b->posn += (b->ptr - buf);
2828 if (b->ptr < b->end) {
2829 /*
71200d45 2830 * We did not consume all of it
14a5cf38
JH		 2831 */
2832 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2833 b->posn = PerlIO_tell(PerlIONext(f));
2834 }
2835 }
2836 }
2837 b->ptr = b->end = b->buf;
2838 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2839 /*
71200d45 2840 * FIXME: Is this right for read case ?
14a5cf38
JH		 2841 */
2842 if (PerlIO_flush(PerlIONext(f)) != 0)
2843 code = -1;
2844 return code;
6f9d8c32
NIS		 2845}
2846
06da4f11
NIS		 2847IV
2848PerlIOBuf_fill(PerlIO *f)
2849{
14a5cf38
JH		 2850 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2851 PerlIO *n = PerlIONext(f);
2852 SSize_t avail;
2853 /*
2854 * FIXME: doing the down-stream flush is a bad idea if it causes
2855 * pre-read data in stdio buffer to be discarded but this is too
2856 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2857 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2858 */
2859 if (PerlIO_flush(f) != 0)
2860 return -1;
2861 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2862 PerlIOBase_flush_linebuf();
2863
2864 if (!b->buf)
2865 PerlIO_get_base(f); /* allocate via vtable */
2866
2867 b->ptr = b->end = b->buf;
2868 if (PerlIO_fast_gets(n)) {
2869 /*
2870 * Layer below is also buffered We do _NOT_ want to call its
2871 * ->Read() because that will loop till it gets what we asked for
2872 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2873 * hand, or ask it to fill _once_.
14a5cf38
JH		 2874 */
2875 avail = PerlIO_get_cnt(n);
2876 if (avail <= 0) {
2877 avail = PerlIO_fill(n);
2878 if (avail == 0)
2879 avail = PerlIO_get_cnt(n);
2880 else {
2881 if (!PerlIO_error(n) && PerlIO_eof(n))
2882 avail = 0;
2883 }
2884 }
2885 if (avail > 0) {
2886 STDCHAR *ptr = PerlIO_get_ptr(n);
2887 SSize_t cnt = avail;
2888 if (avail > b->bufsiz)
2889 avail = b->bufsiz;
2890 Copy(ptr, b->buf, avail, STDCHAR);
2891 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2892 }
2893 }
2894 else {
2895 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2896 }
2897 if (avail <= 0) {
2898 if (avail == 0)
2899 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2900 else
2901 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2902 return -1;
2903 }
2904 b->end = b->buf + avail;
2905 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2906 return 0;
06da4f11
NIS		 2907}
2908
6f9d8c32 2909SSize_t
9e353e3b 2910PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2911{
14a5cf38
JH		 2912 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2913 if (f) {
2914 if (!b->ptr)
2915 PerlIO_get_base(f);
2916 return PerlIOBase_read(f, vbuf, count);
2917 }
2918 return 0;
6f9d8c32
NIS		 2919}
2920
9e353e3b
NIS		 2921SSize_t
2922PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2923{
14a5cf38
JH		 2924 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2925 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2926 SSize_t unread = 0;
2927 SSize_t avail;
2928 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2929 PerlIO_flush(f);
2930 if (!b->buf)
2931 PerlIO_get_base(f);
2932 if (b->buf) {
2933 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2934 /*
2935 * Buffer is already a read buffer, we can overwrite any chars
71200d45 2936 * which have been read back to buffer start
14a5cf38
JH		 2937 */
2938 avail = (b->ptr - b->buf);
2939 }
2940 else {
2941 /*
2942 * Buffer is idle, set it up so whole buffer is available for
71200d45 2943 * unread
14a5cf38
JH		 2944 */
2945 avail = b->bufsiz;
2946 b->end = b->buf + avail;
2947 b->ptr = b->end;
2948 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2949 /*
71200d45 2950 * Buffer extends _back_ from where we are now
14a5cf38
JH		 2951 */
2952 b->posn -= b->bufsiz;
2953 }
2954 if (avail > (SSize_t) count) {
2955 /*
71200d45 2956 * If we have space for more than count, just move count
14a5cf38
JH		 2957 */
2958 avail = count;
2959 }
2960 if (avail > 0) {
2961 b->ptr -= avail;
2962 buf -= avail;
2963 /*
2964 * In simple stdio-like ungetc() case chars will be already
71200d45 2965 * there
14a5cf38
JH		 2966 */
2967 if (buf != b->ptr) {
2968 Copy(buf, b->ptr, avail, STDCHAR);
2969 }
2970 count -= avail;
2971 unread += avail;
2972 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2973 }
2974 }
2975 return unread;
760ac839
LW		 2976}
2977
9e353e3b
NIS		 2978SSize_t
2979PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2980{
14a5cf38
JH		 2981 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2982 const STDCHAR *buf = (const STDCHAR *) vbuf;
2983 Size_t written = 0;
2984 if (!b->buf)
2985 PerlIO_get_base(f);
2986 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2987 return 0;
2988 while (count > 0) {
2989 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2990 if ((SSize_t) count < avail)
2991 avail = count;
2992 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2993 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2994 while (avail > 0) {
2995 int ch = *buf++;
2996 *(b->ptr)++ = ch;
2997 count--;
2998 avail--;
2999 written++;
3000 if (ch == '\n') {
3001 PerlIO_flush(f);
3002 break;
3003 }
3004 }
3005 }
3006 else {
3007 if (avail) {
3008 Copy(buf, b->ptr, avail, STDCHAR);
3009 count -= avail;
3010 buf += avail;
3011 written += avail;
3012 b->ptr += avail;
3013 }
3014 }
3015 if (b->ptr >= (b->buf + b->bufsiz))
3016 PerlIO_flush(f);
3017 }
3018 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3019 PerlIO_flush(f);
3020 return written;
9e353e3b
NIS		 3021}
3022
3023IV
3024PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3025{
14a5cf38
JH		 3026 IV code;
3027 if ((code = PerlIO_flush(f)) == 0) {
3028 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3029 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3030 code = PerlIO_seek(PerlIONext(f), offset, whence);
3031 if (code == 0) {
3032 b->posn = PerlIO_tell(PerlIONext(f));
3033 }
9e353e3b 3034 }
14a5cf38 3035 return code;
9e353e3b
NIS		 3036}
3037
3038Off_t
3039PerlIOBuf_tell(PerlIO *f)
3040{
14a5cf38
JH		 3041 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3042 /*
71200d45 3043 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3044 */
3045 Off_t posn = b->posn;
3046 if (b->buf) {
3047 /*
71200d45 3048 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3049 */
3050 posn += (b->ptr - b->buf);
3051 }
3052 return posn;
9e353e3b
NIS		 3053}
3054
3055IV
3056PerlIOBuf_close(PerlIO *f)
3057{
14a5cf38
JH		 3058 IV code = PerlIOBase_close(f);
3059 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3060 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
7fcdafbd 3061 safefree(b->buf);
14a5cf38
JH		 3062 }
3063 b->buf = NULL;
3064 b->ptr = b->end = b->buf;
3065 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3066 return code;
760ac839
LW		 3067}
3068
9e353e3b
NIS		 3069STDCHAR *
3070PerlIOBuf_get_ptr(PerlIO *f)
3071{
14a5cf38
JH		 3072 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3073 if (!b->buf)
3074 PerlIO_get_base(f);
3075 return b->ptr;
9e353e3b
NIS		 3076}
3077
05d1247b 3078SSize_t
9e353e3b
NIS		 3079PerlIOBuf_get_cnt(PerlIO *f)
3080{
14a5cf38
JH		 3081 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3082 if (!b->buf)
3083 PerlIO_get_base(f);
3084 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3085 return (b->end - b->ptr);
3086 return 0;
9e353e3b
NIS		 3087}
3088
3089STDCHAR *
3090PerlIOBuf_get_base(PerlIO *f)
3091{
14a5cf38
JH		 3092 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3093 if (!b->buf) {
3094 if (!b->bufsiz)
3095 b->bufsiz = 4096;
7fcdafbd
NIS		 3096 b->buf =
3097 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3098 if (!b->buf) {
3099 b->buf = (STDCHAR *) & b->oneword;
3100 b->bufsiz = sizeof(b->oneword);
3101 }
3102 b->ptr = b->buf;
3103 b->end = b->ptr;
06da4f11 3104 }
14a5cf38 3105 return b->buf;
9e353e3b
NIS		 3106}
3107
3108Size_t
3109PerlIOBuf_bufsiz(PerlIO *f)
3110{
14a5cf38
JH		 3111 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3112 if (!b->buf)
3113 PerlIO_get_base(f);
3114 return (b->end - b->buf);
9e353e3b
NIS		 3115}
3116
3117void
14a5cf38 3118PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3119{
14a5cf38
JH		 3120 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3121 if (!b->buf)
3122 PerlIO_get_base(f);
3123 b->ptr = ptr;
3124 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3125 dTHX;
3126 assert(PerlIO_get_cnt(f) == cnt);
3127 assert(b->ptr >= b->buf);
3128 }
3129 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3130}
3131
71200d45 3132PerlIO *
8cf8f3d1 3133PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3134{
a8fc9800 3135 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3136}
3137
3138
3139
9e353e3b 3140PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3141 "perlio",
3142 sizeof(PerlIOBuf),
3143 PERLIO_K_BUFFERED,
3144 PerlIOBuf_pushed,
3145 PerlIOBase_noop_ok,
3146 PerlIOBuf_open,
3147 NULL,
3148 PerlIOBase_fileno,
71200d45 3149 PerlIOBuf_dup,
14a5cf38
JH		 3150 PerlIOBuf_read,
3151 PerlIOBuf_unread,
3152 PerlIOBuf_write,
3153 PerlIOBuf_seek,
3154 PerlIOBuf_tell,
3155 PerlIOBuf_close,
3156 PerlIOBuf_flush,
3157 PerlIOBuf_fill,
3158 PerlIOBase_eof,
3159 PerlIOBase_error,
3160 PerlIOBase_clearerr,
3161 PerlIOBase_setlinebuf,
3162 PerlIOBuf_get_base,
3163 PerlIOBuf_bufsiz,
3164 PerlIOBuf_get_ptr,
3165 PerlIOBuf_get_cnt,
3166 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3167};
3168
66ecd56b 3169/*--------------------------------------------------------------------------------------*/
14a5cf38 3170/*
71200d45 3171 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3172 */
5e2ab84b
NIS		 3173
3174IV
3175PerlIOPending_fill(PerlIO *f)
3176{
14a5cf38 3177 /*
71200d45 3178 * Should never happen
14a5cf38
JH		 3179 */
3180 PerlIO_flush(f);
3181 return 0;
5e2ab84b
NIS		 3182}
3183
3184IV
3185PerlIOPending_close(PerlIO *f)
3186{
14a5cf38 3187 /*
71200d45 3188 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3189 */
3190 PerlIO_flush(f);
3191 return PerlIO_close(f);
5e2ab84b
NIS		 3192}
3193
3194IV
3195PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3196{
14a5cf38 3197 /*
71200d45 3198 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3199 */
3200 PerlIO_flush(f);
3201 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3202}
3203
3204
3205IV
3206PerlIOPending_flush(PerlIO *f)
3207{
14a5cf38
JH		 3208 dTHX;
3209 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3210 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3211 PerlMemShared_free(b->buf);
3212 b->buf = NULL;
3213 }
3214 PerlIO_pop(aTHX_ f);
3215 return 0;
5e2ab84b
NIS		 3216}
3217
3218void
14a5cf38 3219PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3220{
14a5cf38
JH		 3221 if (cnt <= 0) {
3222 PerlIO_flush(f);
3223 }
3224 else {
3225 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3226 }
5e2ab84b
NIS		 3227}
3228
3229IV
14a5cf38 3230PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3231{
14a5cf38
JH		 3232 IV code = PerlIOBase_pushed(f, mode, arg);
3233 PerlIOl *l = PerlIOBase(f);
3234 /*
71200d45
NIS		 3235 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3236 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3237 */
3238 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3239 (PerlIOBase(PerlIONext(f))->
3240 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3241 return code;
5e2ab84b
NIS		 3242}
3243
3244SSize_t
3245PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3246{
14a5cf38
JH		 3247 SSize_t avail = PerlIO_get_cnt(f);
3248 SSize_t got = 0;
3249 if (count < avail)
3250 avail = count;
3251 if (avail > 0)
3252 got = PerlIOBuf_read(f, vbuf, avail);
3253 if (got >= 0 && got < count) {
3254 SSize_t more =
3255 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3256 if (more >= 0 || got == 0)
3257 got += more;
3258 }
3259 return got;
5e2ab84b
NIS		 3260}
3261
5e2ab84b 3262PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3263 "pending",
3264 sizeof(PerlIOBuf),
3265 PERLIO_K_BUFFERED,
3266 PerlIOPending_pushed,
3267 PerlIOBase_noop_ok,
3268 NULL,
3269 NULL,
3270 PerlIOBase_fileno,
71200d45 3271 PerlIOBuf_dup,
14a5cf38
JH		 3272 PerlIOPending_read,
3273 PerlIOBuf_unread,
3274 PerlIOBuf_write,
3275 PerlIOPending_seek,
3276 PerlIOBuf_tell,
3277 PerlIOPending_close,
3278 PerlIOPending_flush,
3279 PerlIOPending_fill,
3280 PerlIOBase_eof,
3281 PerlIOBase_error,
3282 PerlIOBase_clearerr,
3283 PerlIOBase_setlinebuf,
3284 PerlIOBuf_get_base,
3285 PerlIOBuf_bufsiz,
3286 PerlIOBuf_get_ptr,
3287 PerlIOBuf_get_cnt,
3288 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3289};
3290
3291
3292
3293/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3294/*
3295 * crlf - translation On read translate CR,LF to "\n" we do this by
3296 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3297 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3298 */
3299
14a5cf38
JH		 3300typedef struct {
3301 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3302 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3303 * buffer */
99efab12
NIS		 3304} PerlIOCrlf;
3305
f5b9d040 3306IV
14a5cf38 3307PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3308{
14a5cf38
JH		 3309 IV code;
3310 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3311 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3312#if 0
14a5cf38
JH		 3313 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3314 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3315 PerlIOBase(f)->flags);
5e2ab84b 3316#endif
14a5cf38 3317 return code;
f5b9d040
NIS		 3318}
3319
3320
99efab12
NIS		 3321SSize_t
3322PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3323{
14a5cf38
JH		 3324 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3325 if (c->nl) {
3326 *(c->nl) = 0xd;
3327 c->nl = NULL;
3328 }
3329 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3330 return PerlIOBuf_unread(f, vbuf, count);
3331 else {
3332 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3333 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3334 SSize_t unread = 0;
3335 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3336 PerlIO_flush(f);
3337 if (!b->buf)
3338 PerlIO_get_base(f);
3339 if (b->buf) {
3340 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3341 b->end = b->ptr = b->buf + b->bufsiz;
3342 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3343 b->posn -= b->bufsiz;
3344 }
3345 while (count > 0 && b->ptr > b->buf) {
3346 int ch = *--buf;
3347 if (ch == '\n') {
3348 if (b->ptr - 2 >= b->buf) {
3349 *--(b->ptr) = 0xa;
3350 *--(b->ptr) = 0xd;
3351 unread++;
3352 count--;
3353 }
3354 else {
3355 buf++;
3356 break;
3357 }
3358 }
3359 else {
3360 *--(b->ptr) = ch;
3361 unread++;
3362 count--;
3363 }
3364 }
3365 }
3366 return unread;
3367 }
99efab12
NIS		 3368}
3369
3370SSize_t
3371PerlIOCrlf_get_cnt(PerlIO *f)
3372{
14a5cf38
JH		 3373 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3374 if (!b->buf)
3375 PerlIO_get_base(f);
3376 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3377 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3378 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3379 STDCHAR *nl = b->ptr;
3380 scan:
3381 while (nl < b->end && *nl != 0xd)
3382 nl++;
3383 if (nl < b->end && *nl == 0xd) {
3384 test:
3385 if (nl + 1 < b->end) {
3386 if (nl[1] == 0xa) {
3387 *nl = '\n';
3388 c->nl = nl;
3389 }
3390 else {
3391 /*
71200d45 3392 * Not CR,LF but just CR
14a5cf38
JH		 3393 */
3394 nl++;
3395 goto scan;
3396 }
3397 }
3398 else {
3399 /*
71200d45 3400 * Blast - found CR as last char in buffer
14a5cf38
JH		 3401 */
3402 if (b->ptr < nl) {
3403 /*
3404 * They may not care, defer work as long as
71200d45 3405 * possible
14a5cf38
JH		 3406 */
3407 return (nl - b->ptr);
3408 }
3409 else {
3410 int code;
3411 b->ptr++; /* say we have read it as far as
3412 * flush() is concerned */
3413 b->buf++; /* Leave space an front of buffer */
3414 b->bufsiz--; /* Buffer is thus smaller */
3415 code = PerlIO_fill(f); /* Fetch some more */
3416 b->bufsiz++; /* Restore size for next time */
3417 b->buf--; /* Point at space */
3418 b->ptr = nl = b->buf; /* Which is what we hand
3419 * off */
3420 b->posn--; /* Buffer starts here */
3421 *nl = 0xd; /* Fill in the CR */
3422 if (code == 0)
3423 goto test; /* fill() call worked */
3424 /*
71200d45 3425 * CR at EOF - just fall through
14a5cf38
JH		 3426 */
3427 }
3428 }
3429 }
3430 }
3431 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3432 }
3433 return 0;
99efab12
NIS		 3434}
3435
3436void
14a5cf38
JH		 3437PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3438{
3439 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3440 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3441 IV flags = PerlIOBase(f)->flags;
3442 if (!b->buf)
3443 PerlIO_get_base(f);
3444 if (!ptr) {
3445 if (c->nl)
3446 ptr = c->nl + 1;
3447 else {
3448 ptr = b->end;
3449 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3450 ptr--;
3451 }
3452 ptr -= cnt;
3453 }
3454 else {
3455 /*
71200d45 3456 * Test code - delete when it works ...
14a5cf38
JH		 3457 */
3458 STDCHAR *chk;
3459 if (c->nl)
3460 chk = c->nl + 1;
3461 else {
3462 chk = b->end;
3463 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3464 chk--;
3465 }
3466 chk -= cnt;
3467
3468 if (ptr != chk) {
3469 dTHX;
3470 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3471 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3472 b->end, cnt);
3473 }
3474 }
3475 if (c->nl) {
3476 if (ptr > c->nl) {
3477 /*
71200d45 3478 * They have taken what we lied about
14a5cf38
JH		 3479 */
3480 *(c->nl) = 0xd;
3481 c->nl = NULL;
3482 ptr++;
3483 }
3484 }
3485 b->ptr = ptr;
3486 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3487}
3488
3489SSize_t
3490PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3491{
14a5cf38
JH		 3492 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3493 return PerlIOBuf_write(f, vbuf, count);
3494 else {
3495 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3496 const STDCHAR *buf = (const STDCHAR *) vbuf;
3497 const STDCHAR *ebuf = buf + count;
3498 if (!b->buf)
3499 PerlIO_get_base(f);
3500 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3501 return 0;
3502 while (buf < ebuf) {
3503 STDCHAR *eptr = b->buf + b->bufsiz;
3504 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3505 while (buf < ebuf && b->ptr < eptr) {
3506 if (*buf == '\n') {
3507 if ((b->ptr + 2) > eptr) {
3508 /*
71200d45 3509 * Not room for both
14a5cf38
JH		 3510 */
3511 PerlIO_flush(f);
3512 break;
3513 }
3514 else {
3515 *(b->ptr)++ = 0xd; /* CR */
3516 *(b->ptr)++ = 0xa; /* LF */
3517 buf++;
3518 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3519 PerlIO_flush(f);
3520 break;
3521 }
3522 }
3523 }
3524 else {
3525 int ch = *buf++;
3526 *(b->ptr)++ = ch;
3527 }
3528 if (b->ptr >= eptr) {
3529 PerlIO_flush(f);
3530 break;
3531 }
3532 }
3533 }
3534 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3535 PerlIO_flush(f);
3536 return (buf - (STDCHAR *) vbuf);
3537 }
99efab12
NIS		 3538}
3539
3540IV
3541PerlIOCrlf_flush(PerlIO *f)
3542{
14a5cf38
JH		 3543 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3544 if (c->nl) {
3545 *(c->nl) = 0xd;
3546 c->nl = NULL;
3547 }
3548 return PerlIOBuf_flush(f);
99efab12
NIS		 3549}
3550
66ecd56b 3551PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3552 "crlf",
3553 sizeof(PerlIOCrlf),
3554 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3555 PerlIOCrlf_pushed,
3556 PerlIOBase_noop_ok, /* popped */
3557 PerlIOBuf_open,
3558 NULL,
3559 PerlIOBase_fileno,
71200d45 3560 PerlIOBuf_dup,
14a5cf38
JH		 3561 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3562 * ... */
3563 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3564 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3565 PerlIOBuf_seek,
3566 PerlIOBuf_tell,
3567 PerlIOBuf_close,
3568 PerlIOCrlf_flush,
3569 PerlIOBuf_fill,
3570 PerlIOBase_eof,
3571 PerlIOBase_error,
3572 PerlIOBase_clearerr,
3573 PerlIOBase_setlinebuf,
3574 PerlIOBuf_get_base,
3575 PerlIOBuf_bufsiz,
3576 PerlIOBuf_get_ptr,
3577 PerlIOCrlf_get_cnt,
3578 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3579};
3580
06da4f11
NIS		 3581#ifdef HAS_MMAP
3582/*--------------------------------------------------------------------------------------*/
14a5cf38 3583/*
71200d45 3584 * mmap as "buffer" layer
14a5cf38 3585 */
06da4f11 3586
14a5cf38
JH		 3587typedef struct {
3588 PerlIOBuf base; /* PerlIOBuf stuff */
3589 Mmap_t mptr; /* Mapped address */
3590 Size_t len; /* mapped length */
3591 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3592} PerlIOMmap;
3593
c3d7c7c9
NIS		 3594static size_t page_size = 0;
3595
06da4f11
NIS		 3596IV
3597PerlIOMmap_map(PerlIO *f)
3598{
14a5cf38
JH		 3599 dTHX;
3600 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3601 IV flags = PerlIOBase(f)->flags;
3602 IV code = 0;
3603 if (m->len)
3604 abort();
3605 if (flags & PERLIO_F_CANREAD) {
3606 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3607 int fd = PerlIO_fileno(f);
3608 struct stat st;
3609 code = fstat(fd, &st);
3610 if (code == 0 && S_ISREG(st.st_mode)) {
3611 SSize_t len = st.st_size - b->posn;
3612 if (len > 0) {
3613 Off_t posn;
3614 if (!page_size) {
68d873c6 3615#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3616 {
3617 SETERRNO(0, SS$_NORMAL);
68d873c6 3618# ifdef _SC_PAGESIZE
14a5cf38 3619 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3620# else
14a5cf38 3621 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3622# endif
14a5cf38
JH		 3623 if ((long) page_size < 0) {
3624 if (errno) {
3625 SV *error = ERRSV;
3626 char *msg;
3627 STRLEN n_a;
3628 (void) SvUPGRADE(error, SVt_PV);
3629 msg = SvPVx(error, n_a);
3630 Perl_croak(aTHX_ "panic: sysconf: %s",
3631 msg);
3632 }
3633 else
3634 Perl_croak(aTHX_
3635 "panic: sysconf: pagesize unknown");
3636 }
3637 }
68d873c6
JH		 3638#else
3639# ifdef HAS_GETPAGESIZE
14a5cf38 3640 page_size = getpagesize();
68d873c6
JH		 3641# else
3642# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3643 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3644# endif
3645# endif
3646#endif
14a5cf38
JH		 3647 if ((IV) page_size <= 0)
3648 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3649 (IV) page_size);
3650 }
3651 if (b->posn < 0) {
3652 /*
3653 * This is a hack - should never happen - open should
71200d45 3654 * have set it !
14a5cf38
JH		 3655 */
3656 b->posn = PerlIO_tell(PerlIONext(f));
3657 }
3658 posn = (b->posn / page_size) * page_size;
3659 len = st.st_size - posn;
3660 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3661 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3662#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3663 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3664#endif
a5262162 3665#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3666 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3667#endif
14a5cf38
JH		 3668 PerlIOBase(f)->flags =
3669 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3670 b->end = ((STDCHAR *) m->mptr) + len;
3671 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3672 b->ptr = b->buf;
3673 m->len = len;
3674 }
3675 else {
3676 b->buf = NULL;
3677 }
3678 }
3679 else {
3680 PerlIOBase(f)->flags =
3681 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3682 b->buf = NULL;
3683 b->ptr = b->end = b->ptr;
3684 code = -1;
3685 }
3686 }
3687 }
3688 return code;
06da4f11
NIS		 3689}
3690
3691IV
3692PerlIOMmap_unmap(PerlIO *f)
3693{
14a5cf38
JH		 3694 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3695 PerlIOBuf *b = &m->base;
3696 IV code = 0;
3697 if (m->len) {
3698 if (b->buf) {
3699 code = munmap(m->mptr, m->len);
3700 b->buf = NULL;
3701 m->len = 0;
3702 m->mptr = NULL;
3703 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3704 code = -1;
3705 }
3706 b->ptr = b->end = b->buf;
3707 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3708 }
3709 return code;
06da4f11
NIS		 3710}
3711
3712STDCHAR *
3713PerlIOMmap_get_base(PerlIO *f)
3714{
14a5cf38
JH		 3715 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3716 PerlIOBuf *b = &m->base;
3717 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3718 /*
71200d45 3719 * Already have a readbuffer in progress
14a5cf38
JH		 3720 */
3721 return b->buf;
3722 }
3723 if (b->buf) {
3724 /*
71200d45 3725 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3726 */
3727 m->bbuf = b->buf; /* save it in case we need it again */
3728 b->buf = NULL; /* Clear to trigger below */
3729 }
3730 if (!b->buf) {
3731 PerlIOMmap_map(f); /* Try and map it */
3732 if (!b->buf) {
3733 /*
71200d45 3734 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3735 */
3736 b->buf = m->bbuf;
3737 }
3738 }
3739 b->ptr = b->end = b->buf;
3740 if (b->buf)
3741 return b->buf;
3742 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3743}
3744
3745SSize_t
3746PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3747{
14a5cf38
JH		 3748 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3749 PerlIOBuf *b = &m->base;
3750 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3751 PerlIO_flush(f);
3752 if (b->ptr && (b->ptr - count) >= b->buf
3753 && memEQ(b->ptr - count, vbuf, count)) {
3754 b->ptr -= count;
3755 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3756 return count;
3757 }
3758 if (m->len) {
3759 /*
71200d45 3760 * Loose the unwritable mapped buffer
14a5cf38
JH		 3761 */
3762 PerlIO_flush(f);
3763 /*
71200d45 3764 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3765 */
3766 if (!b->buf && m->bbuf)
3767 b->buf = m->bbuf;
3768 if (!b->buf) {
3769 PerlIOBuf_get_base(f);
3770 m->bbuf = b->buf;
3771 }
3772 }
3773 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3774}
3775
3776SSize_t
3777PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3778{
14a5cf38
JH		 3779 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3780 PerlIOBuf *b = &m->base;
3781 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3782 /*
71200d45 3783 * No, or wrong sort of, buffer
14a5cf38
JH		 3784 */
3785 if (m->len) {
3786 if (PerlIOMmap_unmap(f) != 0)
3787 return 0;
3788 }
3789 /*
71200d45 3790 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3791 */
3792 if (!b->buf && m->bbuf)
3793 b->buf = m->bbuf;
3794 if (!b->buf) {
3795 PerlIOBuf_get_base(f);
3796 m->bbuf = b->buf;
3797 }
06da4f11 3798 }
14a5cf38 3799 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3800}
3801
3802IV
3803PerlIOMmap_flush(PerlIO *f)
3804{
14a5cf38
JH		 3805 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3806 PerlIOBuf *b = &m->base;
3807 IV code = PerlIOBuf_flush(f);
3808 /*
71200d45 3809 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3810 */
3811 if (b->buf) {
3812 if (m->len) {
3813 /*
71200d45 3814 * Unmap the buffer
14a5cf38
JH		 3815 */
3816 if (PerlIOMmap_unmap(f) != 0)
3817 code = -1;
3818 }
3819 else {
3820 /*
3821 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3822 * remember it in case we need one later
14a5cf38
JH		 3823 */
3824 m->bbuf = b->buf;
3825 }
3826 }
3827 return code;
06da4f11
NIS		 3828}
3829
3830IV
3831PerlIOMmap_fill(PerlIO *f)
3832{
14a5cf38
JH		 3833 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3834 IV code = PerlIO_flush(f);
3835 if (code == 0 && !b->buf) {
3836 code = PerlIOMmap_map(f);
3837 }
3838 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3839 code = PerlIOBuf_fill(f);
3840 }
3841 return code;
06da4f11
NIS		 3842}
3843
3844IV
3845PerlIOMmap_close(PerlIO *f)
3846{
14a5cf38
JH		 3847 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3848 PerlIOBuf *b = &m->base;
3849 IV code = PerlIO_flush(f);
3850 if (m->bbuf) {
3851 b->buf = m->bbuf;
3852 m->bbuf = NULL;
3853 b->ptr = b->end = b->buf;
3854 }
3855 if (PerlIOBuf_close(f) != 0)
3856 code = -1;
3857 return code;
06da4f11
NIS		 3858}
3859
71200d45 3860PerlIO *
8cf8f3d1 3861PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3862{
a8fc9800 3863 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3864}
3865
06da4f11
NIS		 3866
3867PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3868 "mmap",
3869 sizeof(PerlIOMmap),
3870 PERLIO_K_BUFFERED,
3871 PerlIOBuf_pushed,
3872 PerlIOBase_noop_ok,
3873 PerlIOBuf_open,
3874 NULL,
3875 PerlIOBase_fileno,
71200d45 3876 PerlIOMmap_dup,
14a5cf38
JH		 3877 PerlIOBuf_read,
3878 PerlIOMmap_unread,
3879 PerlIOMmap_write,
3880 PerlIOBuf_seek,
3881 PerlIOBuf_tell,
3882 PerlIOBuf_close,
3883 PerlIOMmap_flush,
3884 PerlIOMmap_fill,
3885 PerlIOBase_eof,
3886 PerlIOBase_error,
3887 PerlIOBase_clearerr,
3888 PerlIOBase_setlinebuf,
3889 PerlIOMmap_get_base,
3890 PerlIOBuf_bufsiz,
3891 PerlIOBuf_get_ptr,
3892 PerlIOBuf_get_cnt,
3893 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3894};
3895
14a5cf38 3896#endif /* HAS_MMAP */
06da4f11 3897
9e353e3b
NIS		 3898void
3899PerlIO_init(void)
760ac839 3900{
14a5cf38 3901 dTHX;
43c11ae3 3902#ifndef WIN32
14a5cf38 3903 call_atexit(PerlIO_cleanup_layers, NULL);
43c11ae3 3904#endif
14a5cf38 3905 if (!_perlio) {
be696b0a 3906#ifndef WIN32
14a5cf38 3907 atexit(&PerlIO_cleanup);
be696b0a 3908#endif
14a5cf38 3909 }
760ac839
LW		 3910}
3911
9e353e3b
NIS		 3912#undef PerlIO_stdin
3913PerlIO *
3914PerlIO_stdin(void)
3915{
14a5cf38
JH		 3916 if (!_perlio) {
3917 dTHX;
3918 PerlIO_stdstreams(aTHX);
3919 }
3920 return &_perlio[1];
9e353e3b
NIS		 3921}
3922
3923#undef PerlIO_stdout
3924PerlIO *
3925PerlIO_stdout(void)
3926{
14a5cf38
JH		 3927 if (!_perlio) {
3928 dTHX;
3929 PerlIO_stdstreams(aTHX);
3930 }
3931 return &_perlio[2];
9e353e3b
NIS		 3932}
3933
3934#undef PerlIO_stderr
3935PerlIO *
3936PerlIO_stderr(void)
3937{
14a5cf38
JH		 3938 if (!_perlio) {
3939 dTHX;
3940 PerlIO_stdstreams(aTHX);
3941 }
3942 return &_perlio[3];
9e353e3b
NIS		 3943}
3944
3945/*--------------------------------------------------------------------------------------*/
3946
3947#undef PerlIO_getname
3948char *
3949PerlIO_getname(PerlIO *f, char *buf)
3950{
14a5cf38
JH		 3951 dTHX;
3952 char *name = NULL;
a15cef0c 3953#ifdef VMS
14a5cf38
JH		 3954 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3955 if (stdio)
3956 name = fgetname(stdio, buf);
a15cef0c 3957#else
14a5cf38 3958 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 3959#endif
14a5cf38 3960 return name;
9e353e3b
NIS		 3961}
3962
3963
3964/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3965/*
3966 * Functions which can be called on any kind of PerlIO implemented in
71200d45 3967 * terms of above
14a5cf38 3968 */
9e353e3b
NIS		 3969
3970#undef PerlIO_getc
6f9d8c32 3971int
9e353e3b 3972PerlIO_getc(PerlIO *f)
760ac839 3973{
14a5cf38
JH		 3974 STDCHAR buf[1];
3975 SSize_t count = PerlIO_read(f, buf, 1);
3976 if (count == 1) {
3977 return (unsigned char) buf[0];
3978 }
3979 return EOF;
313ca112
NIS		 3980}
3981
3982#undef PerlIO_ungetc
3983int
3984PerlIO_ungetc(PerlIO *f, int ch)
3985{
14a5cf38
JH		 3986 if (ch != EOF) {
3987 STDCHAR buf = ch;
3988 if (PerlIO_unread(f, &buf, 1) == 1)
3989 return ch;
3990 }
3991 return EOF;
760ac839
LW		 3992}
3993
9e353e3b
NIS		 3994#undef PerlIO_putc
3995int
3996PerlIO_putc(PerlIO *f, int ch)
760ac839 3997{
14a5cf38
JH		 3998 STDCHAR buf = ch;
3999 return PerlIO_write(f, &buf, 1);
760ac839
LW		 4000}
4001
9e353e3b 4002#undef PerlIO_puts
760ac839 4003int
9e353e3b 4004PerlIO_puts(PerlIO *f, const char *s)
760ac839 4005{
14a5cf38
JH		 4006 STRLEN len = strlen(s);
4007 return PerlIO_write(f, s, len);
760ac839
LW		 4008}
4009
4010#undef PerlIO_rewind
4011void
c78749f2 4012PerlIO_rewind(PerlIO *f)
760ac839 4013{
14a5cf38
JH		 4014 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4015 PerlIO_clearerr(f);
6f9d8c32
NIS		 4016}
4017
4018#undef PerlIO_vprintf
4019int
4020PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4021{
14a5cf38
JH		 4022 dTHX;
4023 SV *sv = newSVpvn("", 0);
4024 char *s;
4025 STRLEN len;
4026 SSize_t wrote;
2cc61e15 4027#ifdef NEED_VA_COPY
14a5cf38
JH		 4028 va_list apc;
4029 Perl_va_copy(ap, apc);
4030 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 4031#else
14a5cf38 4032 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 4033#endif
14a5cf38
JH		 4034 s = SvPV(sv, len);
4035 wrote = PerlIO_write(f, s, len);
4036 SvREFCNT_dec(sv);
4037 return wrote;
760ac839
LW		 4038}
4039
4040#undef PerlIO_printf
6f9d8c32 4041int
14a5cf38 4042PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 4043{
14a5cf38
JH		 4044 va_list ap;
4045 int result;
4046 va_start(ap, fmt);
4047 result = PerlIO_vprintf(f, fmt, ap);
4048 va_end(ap);
4049 return result;
760ac839
LW		 4050}
4051
4052#undef PerlIO_stdoutf
6f9d8c32 4053int
14a5cf38 4054PerlIO_stdoutf(const char *fmt, ...)
760ac839 4055{
14a5cf38
JH		 4056 va_list ap;
4057 int result;
4058 va_start(ap, fmt);
4059 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4060 va_end(ap);
4061 return result;
760ac839
LW		 4062}
4063
4064#undef PerlIO_tmpfile
4065PerlIO *
c78749f2 4066PerlIO_tmpfile(void)