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Integrate change #18420 from maint-5.8:
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
be3c0a43 2 * perlio.c Copyright (c) 1996-2002, 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/*
d31a8517
AT		 8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
10 */
11
12/*
71200d45 13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 14 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 15 * Invent a dSYS macro to abstract this out
14a5cf38 16 */
7bcba3d4
NIS		 17#ifdef PERL_IMPLICIT_SYS
18#define dSYS dTHX
19#else
20#define dSYS dNOOP
21#endif
22
760ac839 23#define VOIDUSED 1
12ae5dfc
JH		 24#ifdef PERL_MICRO
25# include "uconfig.h"
26#else
27# include "config.h"
28#endif
760ac839 29
6f9d8c32 30#define PERLIO_NOT_STDIO 0
760ac839 31#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 32/*
71200d45 33 * #define PerlIO FILE
14a5cf38 34 */
760ac839
LW		 35#endif
36/*
6f9d8c32 37 * This file provides those parts of PerlIO abstraction
88b61e10 38 * which are not #defined in perlio.h.
6f9d8c32 39 * Which these are depends on various Configure #ifdef's
760ac839
LW		 40 */
41
42#include "EXTERN.h"
864dbfa3 43#define PERL_IN_PERLIO_C
760ac839
LW		 44#include "perl.h"
45
32af7c23
CL		 46#ifdef PERL_IMPLICIT_CONTEXT
47#undef dSYS
48#define dSYS dTHX
49#endif
50
0c4f7ff0
NIS		 51#include "XSUB.h"
52
60382766 53int
f5b9d040 54perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 55{
14a5cf38 56 /*
71200d45 57 * This used to be contents of do_binmode in doio.c
14a5cf38 58 */
60382766
NIS		 59#ifdef DOSISH
60# if defined(atarist) || defined(__MINT__)
f5b9d040 61 if (!fflush(fp)) {
60382766 62 if (mode & O_BINARY)
14a5cf38 63 ((FILE *) fp)->_flag |= _IOBIN;
60382766 64 else
14a5cf38 65 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 66 return 1;
67 }
68 return 0;
69# else
eb73beca 70 dTHX;
14a5cf38
JH		 71#ifdef NETWARE
72 if (PerlLIO_setmode(fp, mode) != -1) {
73#else
f5b9d040 74 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 75#endif
60382766 76# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 77 /*
71200d45 78 * The translation mode of the stream is maintained independent of
14a5cf38 79 * the translation mode of the fd in the Borland RTL (heavy
71200d45 80 * digging through their runtime sources reveal). User has to set
14a5cf38 81 * the mode explicitly for the stream (though they don't document
71200d45 82 * this anywhere). GSAR 97-5-24
60382766 83 */
14a5cf38 84 fseek(fp, 0L, 0);
60382766 85 if (mode & O_BINARY)
f5b9d040 86 fp->flags |= _F_BIN;
60382766 87 else
14a5cf38 88 fp->flags &= ~_F_BIN;
60382766
NIS		 89# endif
90 return 1;
91 }
92 else
93 return 0;
94# endif
95#else
96# if defined(USEMYBINMODE)
04a0f00b 97 dTHX;
60382766
NIS		 98 if (my_binmode(fp, iotype, mode) != FALSE)
99 return 1;
100 else
101 return 0;
102# else
103 return 1;
104# endif
105#endif
106}
107
06c7082d 108#ifndef O_ACCMODE
22569500 109#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS		 110#endif
111
112int
113PerlIO_intmode2str(int rawmode, char *mode, int *writing)
114{
115 int result = rawmode & O_ACCMODE;
116 int ix = 0;
117 int ptype;
118 switch (result) {
119 case O_RDONLY:
120 ptype = IoTYPE_RDONLY;
121 break;
122 case O_WRONLY:
123 ptype = IoTYPE_WRONLY;
124 break;
125 case O_RDWR:
126 default:
127 ptype = IoTYPE_RDWR;
128 break;
129 }
130 if (writing)
131 *writing = (result != O_RDONLY);
132
133 if (result == O_RDONLY) {
134 mode[ix++] = 'r';
135 }
136#ifdef O_APPEND
137 else if (rawmode & O_APPEND) {
138 mode[ix++] = 'a';
139 if (result != O_WRONLY)
140 mode[ix++] = '+';
141 }
142#endif
143 else {
144 if (result == O_WRONLY)
145 mode[ix++] = 'w';
146 else {
147 mode[ix++] = 'r';
148 mode[ix++] = '+';
149 }
150 }
151 if (rawmode & O_BINARY)
152 mode[ix++] = 'b';
153 mode[ix] = '\0';
154 return ptype;
155}
156
eb73beca
NIS		 157#ifndef PERLIO_LAYERS
158int
159PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
160{
6874a2de
NIS		 161 if (!names || !*names
162 || strEQ(names, ":crlf")
163 || strEQ(names, ":raw")
164 || strEQ(names, ":bytes")
165 ) {
14a5cf38
JH		 166 return 0;
167 }
168 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
169 /*
71200d45 170 * NOTREACHED
14a5cf38
JH		 171 */
172 return -1;
eb73beca
NIS		 173}
174
13621cfb
NIS		 175void
176PerlIO_destruct(pTHX)
177{
178}
179
f5b9d040
NIS		 180int
181PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
182{
92bff44d 183#ifdef USE_SFIO
14a5cf38 184 return 1;
92bff44d 185#else
14a5cf38 186 return perlsio_binmode(fp, iotype, mode);
92bff44d 187#endif
f5b9d040 188}
60382766 189
e0fa5af2 190PerlIO *
ecdeb87c 191PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 192{
0553478e
NIS		 193#ifdef PERL_MICRO
194 return NULL;
195#else
196#ifdef PERL_IMPLICIT_SYS
22569500 197 return PerlSIO_fdupopen(f);
0553478e 198#else
30753f56
NIS		 199#ifdef WIN32
200 return win32_fdupopen(f);
201#else
e0fa5af2
NIS		 202 if (f) {
203 int fd = PerlLIO_dup(PerlIO_fileno(f));
204 if (fd >= 0) {
06c7082d
NIS		 205 char mode[8];
206 int omode = fcntl(fd, F_GETFL);
a5936e02
JH		 207#ifdef DJGPP
208 omode = djgpp_get_stream_mode(f);
209#endif
06c7082d 210 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 211 /* the r+ is a hack */
06c7082d 212 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS		 213 }
214 return NULL;
215 }
216 else {
93189314 217 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 218 }
7114a2d2 219#endif
e0fa5af2 220 return NULL;
0553478e 221#endif
30753f56 222#endif
e0fa5af2
NIS		 223}
224
225
14a5cf38 226/*
71200d45 227 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 228 */
ee518936
NIS		 229
230PerlIO *
14a5cf38
JH		 231PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
232 int imode, int perm, PerlIO *old, int narg, SV **args)
233{
7cf31beb
NIS		 234 if (narg) {
235 if (narg > 1) {
3b8752bb 236 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 237 }
14a5cf38
JH		 238 if (*args == &PL_sv_undef)
239 return PerlIO_tmpfile();
240 else {
241 char *name = SvPV_nolen(*args);
242 if (*mode == '#') {
243 fd = PerlLIO_open3(name, imode, perm);
244 if (fd >= 0)
245 return PerlIO_fdopen(fd, (char *) mode + 1);
246 }
247 else if (old) {
248 return PerlIO_reopen(name, mode, old);
249 }
250 else {
251 return PerlIO_open(name, mode);
252 }
253 }
254 }
255 else {
256 return PerlIO_fdopen(fd, (char *) mode);
257 }
258 return NULL;
ee518936
NIS		 259}
260
0c4f7ff0
NIS		 261XS(XS_PerlIO__Layer__find)
262{
14a5cf38
JH		 263 dXSARGS;
264 if (items < 2)
265 Perl_croak(aTHX_ "Usage class->find(name[,load])");
266 else {
267 char *name = SvPV_nolen(ST(1));
268 ST(0) = (strEQ(name, "crlf")
269 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
270 XSRETURN(1);
271 }
0c4f7ff0
NIS		 272}
273
274
275void
276Perl_boot_core_PerlIO(pTHX)
277{
14a5cf38 278 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 279}
280
ac27b0f5
NIS		 281#endif
282
32e30700 283
6f9d8c32 284#ifdef PERLIO_IS_STDIO
760ac839
LW		 285
286void
e8632036 287PerlIO_init(pTHX)
760ac839 288{
14a5cf38
JH		 289 /*
290 * Does nothing (yet) except force this file to be included in perl
71200d45 291 * binary. That allows this file to force inclusion of other functions
14a5cf38 292 * that may be required by loadable extensions e.g. for
71200d45 293 * FileHandle::tmpfile
14a5cf38 294 */
760ac839
LW		 295}
296
33dcbb9a 297#undef PerlIO_tmpfile
298PerlIO *
8ac85365 299PerlIO_tmpfile(void)
33dcbb9a 300{
14a5cf38 301 return tmpfile();
33dcbb9a 302}
303
22569500 304#else /* PERLIO_IS_STDIO */
760ac839
LW		 305
306#ifdef USE_SFIO
307
308#undef HAS_FSETPOS
309#undef HAS_FGETPOS
310
14a5cf38
JH		 311/*
312 * This section is just to make sure these functions get pulled in from
71200d45 313 * libsfio.a
14a5cf38 314 */
760ac839
LW		 315
316#undef PerlIO_tmpfile
317PerlIO *
c78749f2 318PerlIO_tmpfile(void)
760ac839 319{
14a5cf38 320 return sftmp(0);
760ac839
LW		 321}
322
323void
e8632036 324PerlIO_init(pTHX)
760ac839 325{
14a5cf38
JH		 326 /*
327 * Force this file to be included in perl binary. Which allows this
328 * file to force inclusion of other functions that may be required by
71200d45 329 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 330 */
760ac839 331
14a5cf38 332 /*
71200d45 333 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 334 * results in a lot of lseek()s to regular files and lot of small
71200d45 335 * writes to pipes.
14a5cf38
JH		 336 */
337 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 338}
339
b9d6bf13 340/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 341PerlIO *
4b069b44 342PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 343{
14a5cf38 344 int fd = fileno(stdio);
4b069b44 345 if (!mode || !*mode) {
81428673 346 mode = "r+";
4b069b44
NIS		 347 }
348 return PerlIO_fdopen(fd, mode);
92bff44d
NIS		 349}
350
351FILE *
352PerlIO_findFILE(PerlIO *pio)
353{
14a5cf38
JH		 354 int fd = PerlIO_fileno(pio);
355 FILE *f = fdopen(fd, "r+");
356 PerlIO_flush(pio);
357 if (!f && errno == EINVAL)
358 f = fdopen(fd, "w");
359 if (!f && errno == EINVAL)
360 f = fdopen(fd, "r");
361 return f;
92bff44d
NIS		 362}
363
364
22569500 365#else /* USE_SFIO */
6f9d8c32 366/*======================================================================================*/
14a5cf38 367/*
71200d45 368 * Implement all the PerlIO interface ourselves.
9e353e3b 369 */
760ac839 370
76ced9ad
NIS		 371#include "perliol.h"
372
14a5cf38
JH		 373/*
374 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 375 * files
14a5cf38 376 */
02f66e2f
NIS		 377#ifdef I_UNISTD
378#include <unistd.h>
379#endif
06da4f11
NIS		 380#ifdef HAS_MMAP
381#include <sys/mman.h>
382#endif
383
02f66e2f 384
14a5cf38
JH		 385void PerlIO_debug(const char *fmt, ...)
386 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 387
6f9d8c32 388void
14a5cf38
JH		 389PerlIO_debug(const char *fmt, ...)
390{
391 static int dbg = 0;
392 va_list ap;
393 dSYS;
394 va_start(ap, fmt);
395 if (!dbg) {
396 char *s = PerlEnv_getenv("PERLIO_DEBUG");
397 if (s && *s)
398 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
399 else
400 dbg = -1;
401 }
402 if (dbg > 0) {
403 dTHX;
70ace5da
NIS		 404#ifdef USE_ITHREADS
405 /* Use fixed buffer as sv_catpvf etc. needs SVs */
406 char buffer[1024];
407 char *s;
408 STRLEN len;
409 s = CopFILE(PL_curcop);
410 if (!s)
411 s = "(none)";
412 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
22569500 413 len = strlen(buffer);
70ace5da
NIS		 414 vsprintf(buffer+len, fmt, ap);
415 PerlLIO_write(dbg, buffer, strlen(buffer));
416#else
14a5cf38
JH		 417 SV *sv = newSVpvn("", 0);
418 char *s;
419 STRLEN len;
420 s = CopFILE(PL_curcop);
421 if (!s)
422 s = "(none)";
423 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
424 (IV) CopLINE(PL_curcop));
425 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
426
427 s = SvPV(sv, len);
428 PerlLIO_write(dbg, s, len);
429 SvREFCNT_dec(sv);
70ace5da 430#endif
14a5cf38
JH		 431 }
432 va_end(ap);
6f9d8c32
NIS		 433}
434
9e353e3b
NIS		 435/*--------------------------------------------------------------------------------------*/
436
14a5cf38 437/*
71200d45 438 * Inner level routines
14a5cf38 439 */
9e353e3b 440
14a5cf38 441/*
71200d45 442 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 443 */
05d1247b 444#define PERLIO_TABLE_SIZE 64
6f9d8c32 445
760ac839 446PerlIO *
5f1a76d0 447PerlIO_allocate(pTHX)
6f9d8c32 448{
14a5cf38 449 /*
71200d45 450 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 451 */
452 PerlIO **last;
453 PerlIO *f;
a1ea730d 454 last = &PL_perlio;
14a5cf38
JH		 455 while ((f = *last)) {
456 int i;
457 last = (PerlIO **) (f);
458 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
459 if (!*++f) {
460 return f;
461 }
462 }
463 }
3a1ee7e8 464 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH		 465 if (!f) {
466 return NULL;
467 }
468 *last = f;
469 return f + 1;
05d1247b
NIS		 470}
471
a1ea730d
NIS		 472#undef PerlIO_fdupopen
473PerlIO *
ecdeb87c 474PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 475{
04892f78 476 if (PerlIOValid(f)) {
a1ea730d
NIS		 477 PerlIO_funcs *tab = PerlIOBase(f)->tab;
478 PerlIO *new;
fe5a182c 479 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
22569500 480 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
a1ea730d
NIS		 481 return new;
482 }
483 else {
93189314 484 SETERRNO(EBADF, SS_IVCHAN);
a1ea730d
NIS		 485 return NULL;
486 }
487}
488
489void
5f1a76d0 490PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 491{
14a5cf38
JH		 492 PerlIO *table = *tablep;
493 if (table) {
494 int i;
495 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
496 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
497 PerlIO *f = table + i;
498 if (*f) {
499 PerlIO_close(f);
500 }
501 }
3a1ee7e8 502 Safefree(table);
14a5cf38 503 *tablep = NULL;
05d1247b 504 }
05d1247b
NIS		 505}
506
fcf2db38
NIS		 507
508PerlIO_list_t *
3a1ee7e8 509PerlIO_list_alloc(pTHX)
fcf2db38 510{
14a5cf38
JH		 511 PerlIO_list_t *list;
512 Newz('L', list, 1, PerlIO_list_t);
513 list->refcnt = 1;
514 return list;
fcf2db38
NIS		 515}
516
517void
3a1ee7e8 518PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 519{
14a5cf38
JH		 520 if (list) {
521 if (--list->refcnt == 0) {
522 if (list->array) {
14a5cf38
JH		 523 IV i;
524 for (i = 0; i < list->cur; i++) {
525 if (list->array[i].arg)
526 SvREFCNT_dec(list->array[i].arg);
527 }
528 Safefree(list->array);
529 }
530 Safefree(list);
531 }
532 }
fcf2db38
NIS		 533}
534
535void
3a1ee7e8 536PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 537{
14a5cf38
JH		 538 PerlIO_pair_t *p;
539 if (list->cur >= list->len) {
540 list->len += 8;
541 if (list->array)
542 Renew(list->array, list->len, PerlIO_pair_t);
543 else
544 New('l', list->array, list->len, PerlIO_pair_t);
545 }
546 p = &(list->array[list->cur++]);
547 p->funcs = funcs;
548 if ((p->arg = arg)) {
549 SvREFCNT_inc(arg);
550 }
fcf2db38
NIS		 551}
552
3a1ee7e8
NIS		 553PerlIO_list_t *
554PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
555{
694c95cf
JH		 556 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
557 if (proto) {
558 int i;
559 list = PerlIO_list_alloc(aTHX);
560 for (i=0; i < proto->cur; i++) {
561 SV *arg = Nullsv;
562 if (proto->array[i].arg)
563 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
564 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
565 }
3a1ee7e8
NIS		 566 }
567 return list;
568}
4a4a6116 569
05d1247b 570void
3a1ee7e8 571PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 572{
3aaf42a7 573#ifdef USE_ITHREADS
3a1ee7e8
NIS		 574 PerlIO **table = &proto->Iperlio;
575 PerlIO *f;
576 PL_perlio = NULL;
577 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
578 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
579 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 580 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS		 581 while ((f = *table)) {
582 int i;
583 table = (PerlIO **) (f++);
584 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
585 if (*f) {
93a8090d 586 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS		 587 }
588 f++;
589 }
590 }
3aaf42a7 591#endif
9a6404c5
DM		 592}
593
594void
13621cfb
NIS		 595PerlIO_destruct(pTHX)
596{
a1ea730d 597 PerlIO **table = &PL_perlio;
14a5cf38 598 PerlIO *f;
694c95cf
JH		 599#ifdef USE_ITHREADS
600 PerlIO_debug("Destruct %p\n",aTHX);
601#endif
14a5cf38
JH		 602 while ((f = *table)) {
603 int i;
604 table = (PerlIO **) (f++);
605 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
606 PerlIO *x = f;
607 PerlIOl *l;
608 while ((l = *x)) {
609 if (l->tab->kind & PERLIO_K_DESTRUCT) {
610 PerlIO_debug("Destruct popping %s\n", l->tab->name);
611 PerlIO_flush(x);
612 PerlIO_pop(aTHX_ x);
613 }
614 else {
615 x = PerlIONext(x);
616 }
617 }
618 f++;
619 }
620 }
13621cfb
NIS		 621}
622
623void
a999f61b 624PerlIO_pop(pTHX_ PerlIO *f)
760ac839 625{
14a5cf38
JH		 626 PerlIOl *l = *f;
627 if (l) {
fe5a182c 628 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH		 629 if (l->tab->Popped) {
630 /*
631 * If popped returns non-zero do not free its layer structure
632 * it has either done so itself, or it is shared and still in
71200d45 633 * use
14a5cf38 634 */
f62ce20a 635 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH		 636 return;
637 }
b47cad08 638 *f = l->next;
3a1ee7e8 639 Safefree(l);
a8c08ecd 640 }
6f9d8c32
NIS		 641}
642
9e353e3b 643/*--------------------------------------------------------------------------------------*/
14a5cf38 644/*
71200d45 645 * XS Interface for perl code
14a5cf38 646 */
9e353e3b 647
fcf2db38 648PerlIO_funcs *
2edd7e44 649PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 650{
14a5cf38
JH		 651 IV i;
652 if ((SSize_t) len <= 0)
653 len = strlen(name);
3a1ee7e8
NIS		 654 for (i = 0; i < PL_known_layers->cur; i++) {
655 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38 656 if (memEQ(f->name, name, len)) {
fe5a182c 657 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH		 658 return f;
659 }
660 }
3a1ee7e8
NIS		 661 if (load && PL_subname && PL_def_layerlist
662 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR		 663 if (PL_in_load_module) {
664 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
665 return NULL;
666 } else {
667 SV *pkgsv = newSVpvn("PerlIO", 6);
668 SV *layer = newSVpvn(name, len);
669 ENTER;
670 SAVEINT(PL_in_load_module);
671 PL_in_load_module++;
672 /*
673 * The two SVs are magically freed by load_module
674 */
675 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
676 PL_in_load_module--;
677 LEAVE;
678 return PerlIO_find_layer(aTHX_ name, len, 0);
679 }
14a5cf38
JH		 680 }
681 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
682 return NULL;
f3862f8b
NIS		 683}
684
2a1bc955 685#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 686
687static int
688perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
689{
14a5cf38
JH		 690 if (SvROK(sv)) {
691 IO *io = GvIOn((GV *) SvRV(sv));
692 PerlIO *ifp = IoIFP(io);
693 PerlIO *ofp = IoOFP(io);
694 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
695 }
696 return 0;
b13b2135
NIS		 697}
698
699static int
700perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
701{
14a5cf38
JH		 702 if (SvROK(sv)) {
703 IO *io = GvIOn((GV *) SvRV(sv));
704 PerlIO *ifp = IoIFP(io);
705 PerlIO *ofp = IoOFP(io);
706 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
707 }
708 return 0;
b13b2135
NIS		 709}
710
711static int
712perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
713{
14a5cf38
JH		 714 Perl_warn(aTHX_ "clear %" SVf, sv);
715 return 0;
b13b2135
NIS		 716}
717
718static int
719perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
720{
14a5cf38
JH		 721 Perl_warn(aTHX_ "free %" SVf, sv);
722 return 0;
b13b2135
NIS		 723}
724
725MGVTBL perlio_vtab = {
14a5cf38
JH		 726 perlio_mg_get,
727 perlio_mg_set,
22569500 728 NULL, /* len */
14a5cf38
JH		 729 perlio_mg_clear,
730 perlio_mg_free
b13b2135
NIS		 731};
732
733XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
734{
14a5cf38
JH		 735 dXSARGS;
736 SV *sv = SvRV(ST(1));
737 AV *av = newAV();
738 MAGIC *mg;
739 int count = 0;
740 int i;
741 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
742 SvRMAGICAL_off(sv);
743 mg = mg_find(sv, PERL_MAGIC_ext);
744 mg->mg_virtual = &perlio_vtab;
745 mg_magical(sv);
746 Perl_warn(aTHX_ "attrib %" SVf, sv);
747 for (i = 2; i < items; i++) {
748 STRLEN len;
749 const char *name = SvPV(ST(i), len);
750 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
751 if (layer) {
752 av_push(av, SvREFCNT_inc(layer));
753 }
754 else {
755 ST(count) = ST(i);
756 count++;
757 }
758 }
759 SvREFCNT_dec(av);
760 XSRETURN(count);
761}
762
22569500 763#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 764
e3f3bf95
NIS		 765SV *
766PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 767{
14a5cf38
JH		 768 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
769 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
770 return sv;
e3f3bf95
NIS		 771}
772
0c4f7ff0
NIS		 773XS(XS_PerlIO__Layer__find)
774{
14a5cf38
JH		 775 dXSARGS;
776 if (items < 2)
777 Perl_croak(aTHX_ "Usage class->find(name[,load])");
778 else {
779 STRLEN len = 0;
780 char *name = SvPV(ST(1), len);
781 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
782 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
783 ST(0) =
784 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
785 &PL_sv_undef;
786 XSRETURN(1);
787 }
0c4f7ff0
NIS		 788}
789
e3f3bf95
NIS		 790void
791PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
792{
3a1ee7e8
NIS		 793 if (!PL_known_layers)
794 PL_known_layers = PerlIO_list_alloc(aTHX);
795 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 796 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS		 797}
798
1141d9f8 799int
fcf2db38 800PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 801{
14a5cf38
JH		 802 if (names) {
803 const char *s = names;
804 while (*s) {
805 while (isSPACE(*s) || *s == ':')
806 s++;
807 if (*s) {
808 STRLEN llen = 0;
809 const char *e = s;
810 const char *as = Nullch;
811 STRLEN alen = 0;
812 if (!isIDFIRST(*s)) {
813 /*
814 * Message is consistent with how attribute lists are
815 * passed. Even though this means "foo : : bar" is
71200d45 816 * seen as an invalid separator character.
14a5cf38
JH		 817 */
818 char q = ((*s == '\'') ? '"' : '\'');
99ef548b 819 if (ckWARN(WARN_LAYER))
22569500 820 Perl_warner(aTHX_ packWARN(WARN_LAYER),
1e616cf5
JH		 821 "perlio: invalid separator character %c%c%c in layer specification list %s",
822 q, *s, q, s);
93189314 823 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 824 return -1;
825 }
826 do {
827 e++;
828 } while (isALNUM(*e));
829 llen = e - s;
830 if (*e == '(') {
831 int nesting = 1;
832 as = ++e;
833 while (nesting) {
834 switch (*e++) {
835 case ')':
836 if (--nesting == 0)
837 alen = (e - 1) - as;
838 break;
839 case '(':
840 ++nesting;
841 break;
842 case '\\':
843 /*
844 * It's a nul terminated string, not allowed
845 * to \ the terminating null. Anything other
71200d45 846 * character is passed over.
14a5cf38
JH		 847 */
848 if (*e++) {
849 break;
850 }
851 /*
71200d45 852 * Drop through
14a5cf38
JH		 853 */
854 case '\0':
855 e--;
22569500
NIS		 856 if (ckWARN(WARN_LAYER))
857 Perl_warner(aTHX_ packWARN(WARN_LAYER),
14a5cf38
JH		 858 "perlio: argument list not closed for layer \"%.*s\"",
859 (int) (e - s), s);
860 return -1;
861 default:
862 /*
71200d45 863 * boring.
14a5cf38
JH		 864 */
865 break;
866 }
867 }
868 }
869 if (e > s) {
99ef548b 870 bool warn_layer = ckWARN(WARN_LAYER);
14a5cf38
JH		 871 PerlIO_funcs *layer =
872 PerlIO_find_layer(aTHX_ s, llen, 1);
873 if (layer) {
3a1ee7e8 874 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 875 (as) ? newSVpvn(as,
876 alen) :
877 &PL_sv_undef);
878 }
879 else {
22569500 880 if (warn_layer)
99ef548b 881 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
14a5cf38
JH		 882 (int) llen, s);
883 return -1;
884 }
885 }
886 s = e;
887 }
888 }
889 }
890 return 0;
1141d9f8
NIS		 891}
892
dfebf958 893void
fcf2db38 894PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 895{
14a5cf38 896 PerlIO_funcs *tab = &PerlIO_perlio;
35990314 897#ifdef PERLIO_USING_CRLF
6ce75a77 898 tab = &PerlIO_crlf;
846be114 899#else
6ce75a77 900 if (PerlIO_stdio.Set_ptrcnt)
22569500 901 tab = &PerlIO_stdio;
846be114 902#endif
14a5cf38 903 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 904 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 905 &PL_sv_undef);
dfebf958
NIS		 906}
907
e3f3bf95 908SV *
14a5cf38 909PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 910{
14a5cf38 911 return av->array[n].arg;
e3f3bf95
NIS		 912}
913
f3862f8b 914PerlIO_funcs *
14a5cf38 915PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 916{
14a5cf38
JH		 917 if (n >= 0 && n < av->cur) {
918 PerlIO_debug("Layer %" IVdf " is %s\n", n,
919 av->array[n].funcs->name);
920 return av->array[n].funcs;
921 }
922 if (!def)
923 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
924 return def;
e3f3bf95
NIS		 925}
926
4ec2216f
NIS		 927IV
928PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
929{
930 if (PerlIOValid(f)) {
931 PerlIO_flush(f);
932 PerlIO_pop(aTHX_ f);
933 return 0;
934 }
935 return -1;
936}
937
938PerlIO_funcs PerlIO_remove = {
939 sizeof(PerlIO_funcs),
940 "pop",
941 0,
942 PERLIO_K_DUMMY | PERLIO_K_UTF8,
943 PerlIOPop_pushed,
944 NULL,
945 NULL,
946 NULL,
947 NULL,
948 NULL,
949 NULL,
950 NULL,
951 NULL,
952 NULL,
953 NULL,
954 NULL, /* flush */
955 NULL, /* fill */
956 NULL,
957 NULL,
958 NULL,
959 NULL,
960 NULL, /* get_base */
961 NULL, /* get_bufsiz */
962 NULL, /* get_ptr */
963 NULL, /* get_cnt */
964 NULL, /* set_ptrcnt */
965};
966
fcf2db38 967PerlIO_list_t *
e3f3bf95
NIS		 968PerlIO_default_layers(pTHX)
969{
3a1ee7e8 970 if (!PL_def_layerlist) {
14a5cf38
JH		 971 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
972 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 973 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 974 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 975#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 976 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 977#if 0
14a5cf38 978 osLayer = &PerlIO_win32;
0c4128ad 979#endif
2f8118af 980#endif
14a5cf38
JH		 981 PerlIO_define_layer(aTHX_ & PerlIO_raw);
982 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
983 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
984 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 985#ifdef HAS_MMAP
14a5cf38 986 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 987#endif
14a5cf38 988 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
4ec2216f 989 PerlIO_define_layer(aTHX_ & PerlIO_remove);
14a5cf38 990 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 991 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 992 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
993 &PL_sv_undef);
994 if (s) {
3a1ee7e8 995 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 996 }
997 else {
3a1ee7e8 998 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 999 }
1141d9f8 1000 }
3a1ee7e8
NIS		 1001 if (PL_def_layerlist->cur < 2) {
1002 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1003 }
3a1ee7e8 1004 return PL_def_layerlist;
e3f3bf95
NIS		 1005}
1006
0c4f7ff0
NIS		 1007void
1008Perl_boot_core_PerlIO(pTHX)
1009{
1010#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 1011 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1012 __FILE__);
0c4f7ff0 1013#endif
14a5cf38 1014 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 1015}
e3f3bf95
NIS		 1016
1017PerlIO_funcs *
1018PerlIO_default_layer(pTHX_ I32 n)
1019{
14a5cf38
JH		 1020 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1021 if (n < 0)
1022 n += av->cur;
1023 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 1024}
1025
a999f61b
NIS		 1026#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1027#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 1028
1029void
1141d9f8 1030PerlIO_stdstreams(pTHX)
60382766 1031{
a1ea730d 1032 if (!PL_perlio) {
14a5cf38
JH		 1033 PerlIO_allocate(aTHX);
1034 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1035 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1036 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1037 }
60382766
NIS		 1038}
1039
1040PerlIO *
14a5cf38
JH		 1041PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1042{
2dc2558e
NIS		 1043 if (tab->fsize != sizeof(PerlIO_funcs)) {
1044 mismatch:
1045 Perl_croak(aTHX_ "Layer does not match this perl");
1046 }
1047 if (tab->size) {
1048 PerlIOl *l = NULL;
1049 if (tab->size < sizeof(PerlIOl)) {
1050 goto mismatch;
1051 }
1052 /* Real layer with a data area */
1053 Newc('L',l,tab->size,char,PerlIOl);
1054 if (l && f) {
1055 Zero(l, tab->size, char);
1056 l->next = *f;
1057 l->tab = tab;
1058 *f = l;
1059 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1060 (mode) ? mode : "(Null)", (void*)arg);
1061 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1062 PerlIO_pop(aTHX_ f);
1063 return NULL;
1064 }
1065 }
1066 }
1067 else if (f) {
1068 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS		 1069 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1070 (mode) ? mode : "(Null)", (void*)arg);
2dc2558e 1071 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
14a5cf38
JH		 1072 return NULL;
1073 }
1074 }
1075 return f;
60382766
NIS		 1076}
1077
dfebf958 1078IV
86e05cf2
NIS		 1079PerlIOBase_binmode(pTHX_ PerlIO *f)
1080{
1081 if (PerlIOValid(f)) {
1082 /* Is layer suitable for raw stream ? */
1083 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1084 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1085 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1086 }
1087 else {
1088 /* Not suitable - pop it */
1089 PerlIO_pop(aTHX_ f);
1090 }
1091 return 0;
1092 }
1093 return -1;
1094}
1095
1096IV
2dc2558e 1097PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1098{
86e05cf2 1099
04892f78 1100 if (PerlIOValid(f)) {
86e05cf2
NIS		 1101 PerlIO *t;
1102 PerlIOl *l;
14a5cf38 1103 PerlIO_flush(f);
86e05cf2
NIS		 1104 /*
1105 * Strip all layers that are not suitable for a raw stream
1106 */
1107 t = f;
1108 while (t && (l = *t)) {
1109 if (l->tab->Binmode) {
1110 /* Has a handler - normal case */
1111 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1112 if (*t == l) {
1113 /* Layer still there - move down a layer */
1114 t = PerlIONext(t);
1115 }
1116 }
1117 else {
1118 return -1;
1119 }
14a5cf38
JH		 1120 }
1121 else {
86e05cf2
NIS		 1122 /* No handler - pop it */
1123 PerlIO_pop(aTHX_ t);
14a5cf38
JH		 1124 }
1125 }
86e05cf2
NIS		 1126 if (PerlIOValid(f)) {
1127 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1128 return 0;
1129 }
14a5cf38
JH		 1130 }
1131 return -1;
dfebf958
NIS		 1132}
1133
ac27b0f5 1134int
14a5cf38 1135PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1136 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1137{
14a5cf38
JH		 1138 int code = 0;
1139 while (n < max) {
1140 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1141 if (tab) {
1142 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1143 code = -1;
1144 break;
1145 }
1146 }
1147 n++;
1148 }
1149 return code;
e3f3bf95
NIS		 1150}
1151
1152int
ac27b0f5
NIS		 1153PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1154{
14a5cf38 1155 int code = 0;
53f1b6d2 1156 if (f && names) {
3a1ee7e8 1157 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1158 code = PerlIO_parse_layers(aTHX_ layers, names);
1159 if (code == 0) {
d9dac8cd 1160 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1161 }
3a1ee7e8 1162 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1163 }
14a5cf38 1164 return code;
ac27b0f5
NIS		 1165}
1166
f3862f8b 1167
60382766 1168/*--------------------------------------------------------------------------------------*/
14a5cf38 1169/*
71200d45 1170 * Given the abstraction above the public API functions
14a5cf38 1171 */
60382766
NIS		 1172
1173int
f5b9d040 1174PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1175{
14a5cf38 1176 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1177 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1178 (names) ? names : "(Null)");
03c0554d
NIS		 1179 if (names) {
1180 /* Do not flush etc. if (e.g.) switching encodings.
1181 if a pushed layer knows it needs to flush lower layers
1182 (for example :unix which is never going to call them)
1183 it can do the flush when it is pushed.
1184 */
1185 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1186 }
1187 else {
86e05cf2 1188 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1189#ifdef PERLIO_USING_CRLF
03c0554d
NIS		 1190 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1191 O_BINARY so we can look for it in mode.
1192 */
1193 if (!(mode & O_BINARY)) {
1194 /* Text mode */
86e05cf2
NIS		 1195 /* FIXME?: Looking down the layer stack seems wrong,
1196 but is a way of reaching past (say) an encoding layer
1197 to flip CRLF-ness of the layer(s) below
1198 */
03c0554d
NIS		 1199 while (*f) {
1200 /* Perhaps we should turn on bottom-most aware layer
1201 e.g. Ilya's idea that UNIX TTY could serve
1202 */
1203 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1204 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1205 /* Not in text mode - flush any pending stuff and flip it */
1206 PerlIO_flush(f);
1207 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1208 }
1209 /* Only need to turn it on in one layer so we are done */
1210 return TRUE;
ed53a2bb 1211 }
03c0554d 1212 f = PerlIONext(f);
14a5cf38 1213 }
03c0554d
NIS		 1214 /* Not finding a CRLF aware layer presumably means we are binary
1215 which is not what was requested - so we failed
1216 We _could_ push :crlf layer but so could caller
1217 */
1218 return FALSE;
14a5cf38 1219 }
6ce75a77 1220#endif
86e05cf2
NIS		 1221 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1222 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1223 */
86e05cf2 1224 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
14a5cf38 1225 }
f5b9d040
NIS		 1226}
1227
f5b9d040 1228int
e87a358a 1229PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1230{
04892f78 1231 if (PerlIOValid(f))
f62ce20a 1232 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38 1233 else {
93189314 1234 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1235 return -1;
1236 }
76ced9ad
NIS		 1237}
1238
b931b1d9 1239int
e87a358a 1240Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1241{
14a5cf38 1242 int code = -1;
04892f78 1243 if (PerlIOValid(f)) {
f62ce20a 1244 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH		 1245 while (*f) {
1246 PerlIO_pop(aTHX_ f);
1247 }
f6c77cf1 1248 }
14a5cf38 1249 return code;
b931b1d9
NIS		 1250}
1251
b931b1d9 1252int
e87a358a 1253Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1254{
04892f78 1255 if (PerlIOValid(f))
f62ce20a 1256 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
14a5cf38 1257 else {
93189314 1258 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1259 return -1;
1260 }
b931b1d9
NIS		 1261}
1262
1141d9f8
NIS		 1263static const char *
1264PerlIO_context_layers(pTHX_ const char *mode)
1265{
14a5cf38
JH		 1266 const char *type = NULL;
1267 /*
71200d45 1268 * Need to supply default layer info from open.pm
14a5cf38
JH		 1269 */
1270 if (PL_curcop) {
1271 SV *layers = PL_curcop->cop_io;
1272 if (layers) {
1273 STRLEN len;
1274 type = SvPV(layers, len);
1275 if (type && mode[0] != 'r') {
1276 /*
71200d45 1277 * Skip to write part
14a5cf38
JH		 1278 */
1279 const char *s = strchr(type, 0);
eb160463 1280 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH		 1281 type = s + 1;
1282 }
1283 }
1284 }
1285 }
1286 return type;
1141d9f8
NIS		 1287}
1288
fcf2db38 1289static PerlIO_funcs *
2edd7e44
NIS		 1290PerlIO_layer_from_ref(pTHX_ SV *sv)
1291{
14a5cf38 1292 /*
71200d45 1293 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1294 */
1295 if (SvTYPE(sv) < SVt_PVAV)
e934609f 1296 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
14a5cf38
JH		 1297
1298 /*
71200d45 1299 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1300 */
1301 switch (SvTYPE(sv)) {
1302 case SVt_PVAV:
1303 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1304 case SVt_PVHV:
1305 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1306 case SVt_PVCV:
1307 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1308 case SVt_PVGV:
1309 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1310 }
1311 return NULL;
2edd7e44
NIS		 1312}
1313
fcf2db38 1314PerlIO_list_t *
14a5cf38
JH		 1315PerlIO_resolve_layers(pTHX_ const char *layers,
1316 const char *mode, int narg, SV **args)
1317{
1318 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1319 int incdef = 1;
a1ea730d 1320 if (!PL_perlio)
14a5cf38
JH		 1321 PerlIO_stdstreams(aTHX);
1322 if (narg) {
1323 SV *arg = *args;
1324 /*
71200d45
NIS		 1325 * If it is a reference but not an object see if we have a handler
1326 * for it
14a5cf38
JH		 1327 */
1328 if (SvROK(arg) && !sv_isobject(arg)) {
1329 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1330 if (handler) {
3a1ee7e8
NIS		 1331 def = PerlIO_list_alloc(aTHX);
1332 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1333 incdef = 0;
1334 }
1335 /*
e934609f 1336 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1337 * something sensible else we will just stringfy and open
71200d45 1338 * resulting string.
14a5cf38
JH		 1339 */
1340 }
1341 }
1342 if (!layers)
1343 layers = PerlIO_context_layers(aTHX_ mode);
1344 if (layers && *layers) {
1345 PerlIO_list_t *av;
1346 if (incdef) {
1347 IV i = def->cur;
3a1ee7e8 1348 av = PerlIO_list_alloc(aTHX);
14a5cf38 1349 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1350 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1351 def->array[i].arg);
1352 }
1353 }
1354 else {
1355 av = def;
1356 }
0cff2cf3
NIS		 1357 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1358 return av;
1359 }
1360 else {
1361 PerlIO_list_free(aTHX_ av);
1362 return (PerlIO_list_t *) NULL;
1363 }
14a5cf38
JH		 1364 }
1365 else {
1366 if (incdef)
1367 def->refcnt++;
1368 return def;
1369 }
ee518936
NIS		 1370}
1371
1372PerlIO *
14a5cf38
JH		 1373PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1374 int imode, int perm, PerlIO *f, int narg, SV **args)
1375{
1376 if (!f && narg == 1 && *args == &PL_sv_undef) {
1377 if ((f = PerlIO_tmpfile())) {
1378 if (!layers)
1379 layers = PerlIO_context_layers(aTHX_ mode);
1380 if (layers && *layers)
1381 PerlIO_apply_layers(aTHX_ f, mode, layers);
1382 }
1383 }
1384 else {
1385 PerlIO_list_t *layera = NULL;
1386 IV n;
1387 PerlIO_funcs *tab = NULL;
04892f78 1388 if (PerlIOValid(f)) {
14a5cf38 1389 /*
71200d45
NIS		 1390 * This is "reopen" - it is not tested as perl does not use it
1391 * yet
14a5cf38
JH		 1392 */
1393 PerlIOl *l = *f;
3a1ee7e8 1394 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1395 while (l) {
04892f78
NIS		 1396 SV *arg = (l->tab->Getarg)
1397 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1398 : &PL_sv_undef;
3a1ee7e8 1399 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1400 l = *PerlIONext(&l);
1401 }
1402 }
1403 else {
1404 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS		 1405 if (!layera) {
1406 return NULL;
1407 }
14a5cf38
JH		 1408 }
1409 /*
71200d45 1410 * Start at "top" of layer stack
14a5cf38
JH		 1411 */
1412 n = layera->cur - 1;
1413 while (n >= 0) {
1414 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1415 if (t && t->Open) {
1416 tab = t;
1417 break;
1418 }
1419 n--;
1420 }
1421 if (tab) {
1422 /*
71200d45 1423 * Found that layer 'n' can do opens - call it
14a5cf38 1424 */
7cf31beb 1425 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1426 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1427 }
14a5cf38 1428 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH		 1429 tab->name, layers, mode, fd, imode, perm,
1430 (void*)f, narg, (void*)args);
14a5cf38
JH		 1431 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1432 f, narg, args);
1433 if (f) {
1434 if (n + 1 < layera->cur) {
1435 /*
1436 * More layers above the one that we used to open -
71200d45 1437 * apply them now
14a5cf38 1438 */
d9dac8cd
NIS		 1439 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1440 /* If pushing layers fails close the file */
1441 PerlIO_close(f);
14a5cf38
JH		 1442 f = NULL;
1443 }
1444 }
1445 }
1446 }
3a1ee7e8 1447 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1448 }
1449 return f;
ee518936 1450}
b931b1d9
NIS		 1451
1452
9e353e3b 1453SSize_t
e87a358a 1454Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1455{
04892f78 1456 if (PerlIOValid(f))
f62ce20a 1457 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
14a5cf38 1458 else {
93189314 1459 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1460 return -1;
1461 }
760ac839
LW		 1462}
1463
313ca112 1464SSize_t
e87a358a 1465Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1466{
04892f78 1467 if (PerlIOValid(f))
f62ce20a 1468 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
14a5cf38 1469 else {
93189314 1470 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1471 return -1;
1472 }
760ac839
LW		 1473}
1474
9e353e3b 1475SSize_t
e87a358a 1476Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1477{
04892f78 1478 if (PerlIOValid(f))
f62ce20a 1479 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
14a5cf38 1480 else {
93189314 1481 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1482 return -1;
1483 }
760ac839
LW		 1484}
1485
6f9d8c32 1486int
e87a358a 1487Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1488{
04892f78 1489 if (PerlIOValid(f))
f62ce20a 1490 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
14a5cf38 1491 else {
93189314 1492 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1493 return -1;
1494 }
760ac839
LW		 1495}
1496
9e353e3b 1497Off_t
e87a358a 1498Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1499{
04892f78 1500 if (PerlIOValid(f))
f62ce20a 1501 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
14a5cf38 1502 else {
93189314 1503 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1504 return -1;
1505 }
760ac839
LW		 1506}
1507
6f9d8c32 1508int
e87a358a 1509Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1510{
14a5cf38
JH		 1511 if (f) {
1512 if (*f) {
1513 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1514 if (tab && tab->Flush) {
f62ce20a 1515 return (*tab->Flush) (aTHX_ f);
14a5cf38
JH		 1516 }
1517 else {
fe5a182c 1518 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
93189314 1519 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1520 return -1;
1521 }
1522 }
1523 else {
fe5a182c 1524 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1525 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1526 return -1;
1527 }
1528 }
1529 else {
1530 /*
1531 * Is it good API design to do flush-all on NULL, a potentially
1532 * errorneous input? Maybe some magical value (PerlIO*
1533 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1534 * things on fflush(NULL), but should we be bound by their design
71200d45 1535 * decisions? --jhi
14a5cf38 1536 */
a1ea730d 1537 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1538 int code = 0;
1539 while ((f = *table)) {
1540 int i;
1541 table = (PerlIO **) (f++);
1542 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1543 if (*f && PerlIO_flush(f) != 0)
1544 code = -1;
1545 f++;
1546 }
1547 }
1548 return code;
1549 }
760ac839
LW		 1550}
1551
a9c883f6 1552void
f62ce20a 1553PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1554{
a1ea730d 1555 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1556 PerlIO *f;
1557 while ((f = *table)) {
1558 int i;
1559 table = (PerlIO **) (f++);
1560 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1561 if (*f
1562 && (PerlIOBase(f)->
1563 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1564 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1565 PerlIO_flush(f);
1566 f++;
1567 }
a9c883f6 1568 }
a9c883f6
NIS		 1569}
1570
06da4f11 1571int
e87a358a 1572Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1573{
04892f78 1574 if (PerlIOValid(f))
f62ce20a 1575 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
14a5cf38 1576 else {
93189314 1577 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1578 return -1;
1579 }
06da4f11
NIS		 1580}
1581
f3862f8b
NIS		 1582int
1583PerlIO_isutf8(PerlIO *f)
1584{
04892f78 1585 if (PerlIOValid(f))
14a5cf38
JH		 1586 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1587 else {
93189314 1588 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1589 return -1;
1590 }
f3862f8b
NIS		 1591}
1592
6f9d8c32 1593int
e87a358a 1594Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1595{
04892f78 1596 if (PerlIOValid(f))
f62ce20a 1597 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
14a5cf38 1598 else {
93189314 1599 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1600 return -1;
1601 }
9e353e3b
NIS		 1602}
1603
9e353e3b 1604int
e87a358a 1605Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1606{
04892f78 1607 if (PerlIOValid(f))
f62ce20a 1608 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
14a5cf38 1609 else {
93189314 1610 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1611 return -1;
1612 }
9e353e3b
NIS		 1613}
1614
9e353e3b 1615void
e87a358a 1616Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1617{
04892f78 1618 if (PerlIOValid(f))
f62ce20a 1619 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
14a5cf38 1620 else
93189314 1621 SETERRNO(EBADF, SS_IVCHAN);
9e353e3b
NIS		 1622}
1623
9e353e3b 1624void
e87a358a 1625Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1626{
04892f78 1627 if (PerlIOValid(f))
f62ce20a 1628 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
14a5cf38 1629 else
93189314 1630 SETERRNO(EBADF, SS_IVCHAN);
9e353e3b
NIS		 1631}
1632
9e353e3b
NIS		 1633int
1634PerlIO_has_base(PerlIO *f)
1635{
04892f78 1636 if (PerlIOValid(f)) {
14a5cf38
JH		 1637 return (PerlIOBase(f)->tab->Get_base != NULL);
1638 }
1639 return 0;
760ac839
LW		 1640}
1641
9e353e3b
NIS		 1642int
1643PerlIO_fast_gets(PerlIO *f)
760ac839 1644{
04892f78 1645 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
14a5cf38
JH		 1646 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1647 return (tab->Set_ptrcnt != NULL);
1648 }
1649 return 0;
9e353e3b
NIS		 1650}
1651
9e353e3b
NIS		 1652int
1653PerlIO_has_cntptr(PerlIO *f)
1654{
04892f78 1655 if (PerlIOValid(f)) {
14a5cf38
JH		 1656 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1657 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1658 }
1659 return 0;
9e353e3b
NIS		 1660}
1661
9e353e3b
NIS		 1662int
1663PerlIO_canset_cnt(PerlIO *f)
1664{
04892f78 1665 if (PerlIOValid(f)) {
14a5cf38
JH		 1666 PerlIOl *l = PerlIOBase(f);
1667 return (l->tab->Set_ptrcnt != NULL);
1668 }
1669 return 0;
760ac839
LW		 1670}
1671
888911fc 1672STDCHAR *
e87a358a 1673Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1674{
04892f78 1675 if (PerlIOValid(f))
f62ce20a 1676 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
14a5cf38 1677 return NULL;
9e353e3b
NIS		 1678}
1679
9e353e3b 1680int
e87a358a 1681Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1682{
04892f78 1683 if (PerlIOValid(f))
f62ce20a 1684 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
14a5cf38 1685 return 0;
9e353e3b
NIS		 1686}
1687
9e353e3b 1688STDCHAR *
e87a358a 1689Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1690{
04892f78
NIS		 1691 if (PerlIOValid(f)) {
1692 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1693 if (tab->Get_ptr == NULL)
1694 return NULL;
1695 return (*tab->Get_ptr) (aTHX_ f);
1696 }
1697 return NULL;
9e353e3b
NIS		 1698}
1699
05d1247b 1700int
e87a358a 1701Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1702{
04892f78
NIS		 1703 if (PerlIOValid(f)) {
1704 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1705 if (tab->Get_cnt == NULL)
1706 return 0;
1707 return (*tab->Get_cnt) (aTHX_ f);
1708 }
1709 return 0;
9e353e3b
NIS		 1710}
1711
9e353e3b 1712void
e87a358a 1713Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1714{
04892f78
NIS		 1715 if (PerlIOValid(f)) {
1716 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1717 }
9e353e3b
NIS		 1718}
1719
9e353e3b 1720void
e87a358a 1721Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1722{
04892f78
NIS		 1723 if (PerlIOValid(f)) {
1724 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1725 if (tab->Set_ptrcnt == NULL) {
1726 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1727 }
1728 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
14a5cf38 1729 }
9e353e3b
NIS		 1730}
1731
4ec2216f 1732
9e353e3b 1733/*--------------------------------------------------------------------------------------*/
14a5cf38 1734/*
71200d45 1735 * utf8 and raw dummy layers
14a5cf38 1736 */
dfebf958 1737
26fb694e 1738IV
2dc2558e 1739PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1740{
00f51856 1741 if (PerlIOValid(f)) {
14a5cf38
JH		 1742 if (tab->kind & PERLIO_K_UTF8)
1743 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1744 else
1745 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1746 return 0;
1747 }
1748 return -1;
26fb694e
NIS		 1749}
1750
dfebf958 1751PerlIO_funcs PerlIO_utf8 = {
2dc2558e 1752 sizeof(PerlIO_funcs),
14a5cf38 1753 "utf8",
2dc2558e 1754 0,
6874a2de 1755 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH		 1756 PerlIOUtf8_pushed,
1757 NULL,
1758 NULL,
1759 NULL,
1760 NULL,
1761 NULL,
1762 NULL,
1763 NULL,
1764 NULL,
1765 NULL,
1766 NULL,
22569500
NIS		 1767 NULL, /* flush */
1768 NULL, /* fill */
14a5cf38
JH		 1769 NULL,
1770 NULL,
1771 NULL,
1772 NULL,
22569500
NIS		 1773 NULL, /* get_base */
1774 NULL, /* get_bufsiz */
1775 NULL, /* get_ptr */
1776 NULL, /* get_cnt */
1777 NULL, /* set_ptrcnt */
26fb694e
NIS		 1778};
1779
1780PerlIO_funcs PerlIO_byte = {
2dc2558e 1781 sizeof(PerlIO_funcs),
14a5cf38 1782 "bytes",
2dc2558e 1783 0,
14a5cf38
JH		 1784 PERLIO_K_DUMMY,
1785 PerlIOUtf8_pushed,
1786 NULL,
1787 NULL,
1788 NULL,
1789 NULL,
1790 NULL,
1791 NULL,
1792 NULL,
1793 NULL,
1794 NULL,
1795 NULL,
22569500
NIS		 1796 NULL, /* flush */
1797 NULL, /* fill */
14a5cf38
JH		 1798 NULL,
1799 NULL,
1800 NULL,
1801 NULL,
22569500
NIS		 1802 NULL, /* get_base */
1803 NULL, /* get_bufsiz */
1804 NULL, /* get_ptr */
1805 NULL, /* get_cnt */
1806 NULL, /* set_ptrcnt */
dfebf958
NIS		 1807};
1808
1809PerlIO *
14a5cf38
JH		 1810PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1811 IV n, const char *mode, int fd, int imode, int perm,
1812 PerlIO *old, int narg, SV **args)
dfebf958 1813{
14a5cf38
JH		 1814 PerlIO_funcs *tab = PerlIO_default_btm();
1815 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1816 old, narg, args);
dfebf958
NIS		 1817}
1818
1819PerlIO_funcs PerlIO_raw = {
2dc2558e 1820 sizeof(PerlIO_funcs),
14a5cf38 1821 "raw",
2dc2558e 1822 0,
14a5cf38
JH		 1823 PERLIO_K_DUMMY,
1824 PerlIORaw_pushed,
1825 PerlIOBase_popped,
1826 PerlIORaw_open,
1827 NULL,
1828 NULL,
1829 NULL,
1830 NULL,
1831 NULL,
1832 NULL,
1833 NULL,
1834 NULL,
22569500
NIS		 1835 NULL, /* flush */
1836 NULL, /* fill */
14a5cf38
JH		 1837 NULL,
1838 NULL,
1839 NULL,
1840 NULL,
22569500
NIS		 1841 NULL, /* get_base */
1842 NULL, /* get_bufsiz */
1843 NULL, /* get_ptr */
1844 NULL, /* get_cnt */
1845 NULL, /* set_ptrcnt */
dfebf958
NIS		 1846};
1847/*--------------------------------------------------------------------------------------*/
1848/*--------------------------------------------------------------------------------------*/
14a5cf38 1849/*
71200d45 1850 * "Methods" of the "base class"
14a5cf38 1851 */
9e353e3b
NIS		 1852
1853IV
f62ce20a 1854PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1855{
04892f78 1856 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS		 1857}
1858
f5b9d040 1859char *
81428673 1860PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH		 1861{
1862 char *s = buf;
81428673
NIS		 1863 if (PerlIOValid(f)) {
1864 IV flags = PerlIOBase(f)->flags;
1865 if (flags & PERLIO_F_APPEND) {
1866 *s++ = 'a';
1867 if (flags & PERLIO_F_CANREAD) {
1868 *s++ = '+';
1869 }
14a5cf38 1870 }
81428673
NIS		 1871 else if (flags & PERLIO_F_CANREAD) {
1872 *s++ = 'r';
1873 if (flags & PERLIO_F_CANWRITE)
1874 *s++ = '+';
1875 }
1876 else if (flags & PERLIO_F_CANWRITE) {
1877 *s++ = 'w';
1878 if (flags & PERLIO_F_CANREAD) {
1879 *s++ = '+';
1880 }
14a5cf38 1881 }
35990314 1882#ifdef PERLIO_USING_CRLF
81428673
NIS		 1883 if (!(flags & PERLIO_F_CRLF))
1884 *s++ = 'b';
5f1a76d0 1885#endif
81428673 1886 }
14a5cf38
JH		 1887 *s = '\0';
1888 return buf;
f5b9d040
NIS		 1889}
1890
81428673 1891
76ced9ad 1892IV
2dc2558e 1893PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1894{
14a5cf38 1895 PerlIOl *l = PerlIOBase(f);
b7953727 1896#if 0
14a5cf38
JH		 1897 const char *omode = mode;
1898 char temp[8];
b7953727 1899#endif
14a5cf38
JH		 1900 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1901 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1902 if (tab->Set_ptrcnt != NULL)
1903 l->flags |= PERLIO_F_FASTGETS;
1904 if (mode) {
1905 if (*mode == '#' || *mode == 'I')
1906 mode++;
1907 switch (*mode++) {
1908 case 'r':
1909 l->flags |= PERLIO_F_CANREAD;
1910 break;
1911 case 'a':
1912 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1913 break;
1914 case 'w':
1915 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1916 break;
1917 default:
93189314 1918 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 1919 return -1;
1920 }
1921 while (*mode) {
1922 switch (*mode++) {
1923 case '+':
1924 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1925 break;
1926 case 'b':
1927 l->flags &= ~PERLIO_F_CRLF;
1928 break;
1929 case 't':
1930 l->flags |= PERLIO_F_CRLF;
1931 break;
1932 default:
93189314 1933 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 1934 return -1;
1935 }
1936 }
1937 }
1938 else {
1939 if (l->next) {
1940 l->flags |= l->next->flags &
1941 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1942 PERLIO_F_APPEND);
1943 }
1944 }
5e2ab84b 1945#if 0
14a5cf38
JH		 1946 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1947 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1948 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1949#endif
14a5cf38 1950 return 0;
76ced9ad
NIS		 1951}
1952
1953IV
f62ce20a 1954PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 1955{
14a5cf38 1956 return 0;
760ac839
LW		 1957}
1958
9e353e3b 1959SSize_t
f62ce20a 1960PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 1961{
14a5cf38 1962 /*
71200d45 1963 * Save the position as current head considers it
14a5cf38
JH		 1964 */
1965 Off_t old = PerlIO_tell(f);
1966 SSize_t done;
1967 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1968 PerlIOSelf(f, PerlIOBuf)->posn = old;
f62ce20a 1969 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38 1970 return done;
9e353e3b
NIS		 1971}
1972
f6c77cf1 1973SSize_t
f62ce20a 1974PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 1975{
14a5cf38
JH		 1976 STDCHAR *buf = (STDCHAR *) vbuf;
1977 if (f) {
1978 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1979 return 0;
1980 while (count > 0) {
1981 SSize_t avail = PerlIO_get_cnt(f);
1982 SSize_t take = 0;
1983 if (avail > 0)
eb160463 1984 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH		 1985 if (take > 0) {
1986 STDCHAR *ptr = PerlIO_get_ptr(f);
1987 Copy(ptr, buf, take, STDCHAR);
1988 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1989 count -= take;
1990 buf += take;
1991 }
1992 if (count > 0 && avail <= 0) {
1993 if (PerlIO_fill(f) != 0)
1994 break;
1995 }
1996 }
1997 return (buf - (STDCHAR *) vbuf);
1998 }
f6c77cf1 1999 return 0;
f6c77cf1
NIS		 2000}
2001
9e353e3b 2002IV
f62ce20a 2003PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2004{
14a5cf38 2005 return 0;
9e353e3b
NIS		 2006}
2007
2008IV
f62ce20a 2009PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2010{
14a5cf38 2011 return -1;
06da4f11
NIS		 2012}
2013
2014IV
f62ce20a 2015PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2016{
14a5cf38
JH		 2017 IV code = 0;
2018 PerlIO *n = PerlIONext(f);
2019 if (PerlIO_flush(f) != 0)
2020 code = -1;
04892f78 2021 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
14a5cf38
JH		 2022 code = -1;
2023 PerlIOBase(f)->flags &=
2024 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2025 return code;
9e353e3b
NIS		 2026}
2027
2028IV
f62ce20a 2029PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2030{
04892f78 2031 if (PerlIOValid(f)) {
14a5cf38
JH		 2032 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2033 }
2034 return 1;
9e353e3b
NIS		 2035}
2036
2037IV
f62ce20a 2038PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2039{
04892f78 2040 if (PerlIOValid(f)) {
14a5cf38
JH		 2041 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2042 }
2043 return 1;
9e353e3b
NIS		 2044}
2045
2046void
f62ce20a 2047PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2048{
04892f78 2049 if (PerlIOValid(f)) {
14a5cf38
JH		 2050 PerlIO *n = PerlIONext(f);
2051 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2052 if (PerlIOValid(n))
14a5cf38
JH		 2053 PerlIO_clearerr(n);
2054 }
9e353e3b
NIS		 2055}
2056
2057void
f62ce20a 2058PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2059{
04892f78 2060 if (PerlIOValid(f)) {
14a5cf38
JH		 2061 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2062 }
9e353e3b
NIS		 2063}
2064
93a8090d
NIS		 2065SV *
2066PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2067{
2068 if (!arg)
2069 return Nullsv;
2070#ifdef sv_dup
2071 if (param) {
2072 return sv_dup(arg, param);
2073 }
2074 else {
2075 return newSVsv(arg);
2076 }
2077#else
2078 return newSVsv(arg);
2079#endif
2080}
2081
2082PerlIO *
ecdeb87c 2083PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d
NIS		 2084{
2085 PerlIO *nexto = PerlIONext(o);
04892f78 2086 if (PerlIOValid(nexto)) {
93a8090d 2087 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
ecdeb87c 2088 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
93a8090d
NIS		 2089 }
2090 if (f) {
2091 PerlIO_funcs *self = PerlIOBase(o)->tab;
2092 SV *arg = Nullsv;
2093 char buf[8];
fe5a182c
JH		 2094 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2095 self->name, (void*)f, (void*)o, (void*)param);
93a8090d 2096 if (self->Getarg) {
ecdeb87c 2097 arg = (*self->Getarg)(aTHX_ o,param,flags);
93a8090d
NIS		 2098 }
2099 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2100 if (arg) {
93a8090d
NIS		 2101 SvREFCNT_dec(arg);
2102 }
2103 }
2104 return f;
2105}
2106
2107#define PERLIO_MAX_REFCOUNTABLE_FD 2048
168d5872 2108#ifdef USE_THREADS
93a8090d 2109perl_mutex PerlIO_mutex;
93a8090d 2110#endif
168d5872 2111int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
93a8090d
NIS		 2112
2113void
2114PerlIO_init(pTHX)
2115{
2116 /* Place holder for stdstreams call ??? */
168d5872 2117#ifdef USE_THREADS
93a8090d
NIS		 2118 MUTEX_INIT(&PerlIO_mutex);
2119#endif
2120}
2121
168d5872
NIS		 2122void
2123PerlIOUnix_refcnt_inc(int fd)
2124{
2125 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2126#ifdef USE_THREADS
2127 MUTEX_LOCK(&PerlIO_mutex);
2128#endif
2129 PerlIO_fd_refcnt[fd]++;
2130 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2131#ifdef USE_THREADS
2132 MUTEX_UNLOCK(&PerlIO_mutex);
2133#endif
2134 }
2135}
2136
168d5872
NIS		 2137int
2138PerlIOUnix_refcnt_dec(int fd)
2139{
2140 int cnt = 0;
2141 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2142#ifdef USE_THREADS
2143 MUTEX_LOCK(&PerlIO_mutex);
2144#endif
2145 cnt = --PerlIO_fd_refcnt[fd];
2146 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2147#ifdef USE_THREADS
2148 MUTEX_UNLOCK(&PerlIO_mutex);
2149#endif
2150 }
2151 return cnt;
2152}
2153
694c95cf
JH		 2154void
2155PerlIO_cleanup(pTHX)
2156{
2157 int i;
2158#ifdef USE_ITHREADS
9f4bd222
NIS		 2159 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2160#else
2161 PerlIO_debug("Cleanup layers\n");
694c95cf
JH		 2162#endif
2163 /* Raise STDIN..STDERR refcount so we don't close them */
2164 for (i=0; i < 3; i++)
2165 PerlIOUnix_refcnt_inc(i);
2166 PerlIO_cleantable(aTHX_ &PL_perlio);
2167 /* Restore STDIN..STDERR refcount */
2168 for (i=0; i < 3; i++)
2169 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS		 2170
2171 if (PL_known_layers) {
2172 PerlIO_list_free(aTHX_ PL_known_layers);
2173 PL_known_layers = NULL;
2174 }
2175 if(PL_def_layerlist) {
2176 PerlIO_list_free(aTHX_ PL_def_layerlist);
2177 PL_def_layerlist = NULL;
2178 }
694c95cf
JH		 2179}
2180
2181
2182
9e353e3b 2183/*--------------------------------------------------------------------------------------*/
14a5cf38 2184/*
71200d45 2185 * Bottom-most level for UNIX-like case
14a5cf38 2186 */
9e353e3b 2187
14a5cf38 2188typedef struct {
22569500
NIS		 2189 struct _PerlIO base; /* The generic part */
2190 int fd; /* UNIX like file descriptor */
2191 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2192} PerlIOUnix;
2193
6f9d8c32 2194int
9e353e3b 2195PerlIOUnix_oflags(const char *mode)
760ac839 2196{
14a5cf38
JH		 2197 int oflags = -1;
2198 if (*mode == 'I' || *mode == '#')
2199 mode++;
2200 switch (*mode) {
2201 case 'r':
2202 oflags = O_RDONLY;
2203 if (*++mode == '+') {
2204 oflags = O_RDWR;
2205 mode++;
2206 }
2207 break;
2208
2209 case 'w':
2210 oflags = O_CREAT | O_TRUNC;
2211 if (*++mode == '+') {
2212 oflags |= O_RDWR;
2213 mode++;
2214 }
2215 else
2216 oflags |= O_WRONLY;
2217 break;
2218
2219 case 'a':
2220 oflags = O_CREAT | O_APPEND;
2221 if (*++mode == '+') {
2222 oflags |= O_RDWR;
2223 mode++;
2224 }
2225 else
2226 oflags |= O_WRONLY;
2227 break;
2228 }
2229 if (*mode == 'b') {
2230 oflags |= O_BINARY;
2231 oflags &= ~O_TEXT;
2232 mode++;
2233 }
2234 else if (*mode == 't') {
2235 oflags |= O_TEXT;
2236 oflags &= ~O_BINARY;
2237 mode++;
2238 }
2239 /*
71200d45 2240 * Always open in binary mode
14a5cf38
JH		 2241 */
2242 oflags |= O_BINARY;
2243 if (*mode || oflags == -1) {
93189314 2244 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 2245 oflags = -1;
2246 }
2247 return oflags;
9e353e3b
NIS		 2248}
2249
2250IV
f62ce20a 2251PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2252{
14a5cf38 2253 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2254}
2255
4b803d04 2256IV
2dc2558e 2257PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2258{
2dc2558e 2259 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
93a8090d 2260 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2261 if (*PerlIONext(f)) {
4b069b44 2262 /* We never call down so do any pending stuff now */
03c0554d 2263 PerlIO_flush(PerlIONext(f));
14a5cf38
JH		 2264 s->fd = PerlIO_fileno(PerlIONext(f));
2265 /*
71200d45 2266 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2267 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2268 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2269 */
2270 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2271 }
2272 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2273 return code;
4b803d04
NIS		 2274}
2275
9e353e3b 2276PerlIO *
14a5cf38
JH		 2277PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2278 IV n, const char *mode, int fd, int imode,
2279 int perm, PerlIO *f, int narg, SV **args)
2280{
d9dac8cd 2281 if (PerlIOValid(f)) {
14a5cf38 2282 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2283 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH		 2284 }
2285 if (narg > 0) {
2286 char *path = SvPV_nolen(*args);
2287 if (*mode == '#')
2288 mode++;
2289 else {
2290 imode = PerlIOUnix_oflags(mode);
2291 perm = 0666;
2292 }
2293 if (imode != -1) {
2294 fd = PerlLIO_open3(path, imode, perm);
2295 }
2296 }
2297 if (fd >= 0) {
2298 PerlIOUnix *s;
2299 if (*mode == 'I')
2300 mode++;
2301 if (!f) {
2302 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS		 2303 }
2304 if (!PerlIOValid(f)) {
a33cf58c
NIS		 2305 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2306 return NULL;
2307 }
d9dac8cd 2308 }
a33cf58c 2309 s = PerlIOSelf(f, PerlIOUnix);
14a5cf38
JH		 2310 s->fd = fd;
2311 s->oflags = imode;
2312 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
22569500 2313 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH		 2314 return f;
2315 }
2316 else {
2317 if (f) {
2318 /*
71200d45 2319 * FIXME: pop layers ???
14a5cf38
JH		 2320 */
2321 }
2322 return NULL;
2323 }
9e353e3b
NIS		 2324}
2325
71200d45 2326PerlIO *
ecdeb87c 2327PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS		 2328{
2329 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2330 int fd = os->fd;
ecdeb87c
NIS		 2331 if (flags & PERLIO_DUP_FD) {
2332 fd = PerlLIO_dup(fd);
2333 }
93a8090d 2334 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2335 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 2336 if (f) {
2337 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2338 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2339 s->fd = fd;
93a8090d 2340 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS		 2341 return f;
2342 }
71200d45
NIS		 2343 }
2344 return NULL;
2345}
2346
2347
9e353e3b 2348SSize_t
f62ce20a 2349PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2350{
14a5cf38 2351 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
81428673 2352 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2353 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
14a5cf38 2354 return 0;
1fd8f4ce 2355 }
14a5cf38
JH		 2356 while (1) {
2357 SSize_t len = PerlLIO_read(fd, vbuf, count);
2358 if (len >= 0 || errno != EINTR) {
2359 if (len < 0)
2360 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2361 else if (len == 0 && count != 0)
2362 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2363 return len;
2364 }
2365 PERL_ASYNC_CHECK();
2366 }
9e353e3b
NIS		 2367}
2368
2369SSize_t
f62ce20a 2370PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2371{
14a5cf38
JH		 2372 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2373 while (1) {
2374 SSize_t len = PerlLIO_write(fd, vbuf, count);
2375 if (len >= 0 || errno != EINTR) {
2376 if (len < 0)
2377 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2378 return len;
2379 }
2380 PERL_ASYNC_CHECK();
06da4f11 2381 }
9e353e3b
NIS		 2382}
2383
2384IV
f62ce20a 2385PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2386{
14a5cf38
JH		 2387 Off_t new =
2388 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2389 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2390 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2391}
2392
2393Off_t
f62ce20a 2394PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2395{
14a5cf38 2396 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2397}
2398
71200d45 2399
9e353e3b 2400IV
f62ce20a 2401PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2402{
14a5cf38
JH		 2403 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2404 int code = 0;
168d5872
NIS		 2405 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2406 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS		 2407 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2408 return 0;
22569500 2409 }
93a8090d
NIS		 2410 }
2411 else {
93189314 2412 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS		 2413 return -1;
2414 }
14a5cf38
JH		 2415 while (PerlLIO_close(fd) != 0) {
2416 if (errno != EINTR) {
2417 code = -1;
2418 break;
2419 }
2420 PERL_ASYNC_CHECK();
2421 }
2422 if (code == 0) {
2423 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2424 }
2425 return code;
9e353e3b
NIS		 2426}
2427
2428PerlIO_funcs PerlIO_unix = {
2dc2558e 2429 sizeof(PerlIO_funcs),
14a5cf38
JH		 2430 "unix",
2431 sizeof(PerlIOUnix),
2432 PERLIO_K_RAW,
2433 PerlIOUnix_pushed,
44798d05 2434 PerlIOBase_popped,
14a5cf38 2435 PerlIOUnix_open,
86e05cf2 2436 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 2437 NULL,
2438 PerlIOUnix_fileno,
71200d45 2439 PerlIOUnix_dup,
14a5cf38
JH		 2440 PerlIOUnix_read,
2441 PerlIOBase_unread,
2442 PerlIOUnix_write,
2443 PerlIOUnix_seek,
2444 PerlIOUnix_tell,
2445 PerlIOUnix_close,
22569500
NIS		 2446 PerlIOBase_noop_ok, /* flush */
2447 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH		 2448 PerlIOBase_eof,
2449 PerlIOBase_error,
2450 PerlIOBase_clearerr,
2451 PerlIOBase_setlinebuf,
22569500
NIS		 2452 NULL, /* get_base */
2453 NULL, /* get_bufsiz */
2454 NULL, /* get_ptr */
2455 NULL, /* get_cnt */
2456 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2457};
2458
2459/*--------------------------------------------------------------------------------------*/
14a5cf38 2460/*
71200d45 2461 * stdio as a layer
14a5cf38 2462 */
9e353e3b 2463
313e59c8
NIS		 2464#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2465/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2466 broken by the last second glibc 2.3 fix
2467 */
2468#define STDIO_BUFFER_WRITABLE
2469#endif
2470
2471
14a5cf38
JH		 2472typedef struct {
2473 struct _PerlIO base;
22569500 2474 FILE *stdio; /* The stream */
9e353e3b
NIS		 2475} PerlIOStdio;
2476
2477IV
f62ce20a 2478PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2479{
439ba545 2480 FILE *s;
81428673 2481 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
439ba545
NIS		 2482 return PerlSIO_fileno(s);
2483 }
2484 errno = EBADF;
2485 return -1;
9e353e3b
NIS		 2486}
2487
766a733e 2488char *
14a5cf38
JH		 2489PerlIOStdio_mode(const char *mode, char *tmode)
2490{
2491 char *ret = tmode;
2492 while (*mode) {
2493 *tmode++ = *mode++;
2494 }
35990314 2495#ifdef PERLIO_USING_CRLF
6ce75a77
JH		 2496 *tmode++ = 'b';
2497#endif
14a5cf38
JH		 2498 *tmode = '\0';
2499 return ret;
2500}
2501
4b803d04 2502IV
2dc2558e 2503PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2504{
1fd8f4ce
NIS		 2505 PerlIO *n;
2506 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2507 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2508 if (toptab == tab) {
2509 /* Top is already stdio - pop self (duplicate) and use original */
2510 PerlIO_pop(aTHX_ f);
2511 return 0;
2512 } else {
2513 int fd = PerlIO_fileno(n);
2514 char tmode[8];
2515 FILE *stdio;
81428673 2516 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS		 2517 mode = PerlIOStdio_mode(mode, tmode)))) {
2518 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2519 /* We never call down so do any pending stuff now */
2520 PerlIO_flush(PerlIONext(f));
81428673 2521 }
1fd8f4ce
NIS		 2522 else {
2523 return -1;
2524 }
2525 }
14a5cf38 2526 }
2dc2558e 2527 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS		 2528}
2529
22569500 2530
9e353e3b 2531PerlIO *
4b069b44 2532PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2533{
14a5cf38
JH		 2534 dTHX;
2535 PerlIO *f = NULL;
2536 if (stdio) {
22569500 2537 PerlIOStdio *s;
4b069b44
NIS		 2538 if (!mode || !*mode) {
2539 /* We need to probe to see how we can open the stream
2540 so start with read/write and then try write and read
2541 we dup() so that we can fclose without loosing the fd.
2542
2543 Note that the errno value set by a failing fdopen
2544 varies between stdio implementations.
2545 */
2546 int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2547 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2548 if (!f2) {
a33cf58c 2549 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS		 2550 }
2551 if (!f2) {
a33cf58c 2552 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS		 2553 }
2554 if (!f2) {
2555 /* Don't seem to be able to open */
2556 PerlLIO_close(fd);
2557 return f;
2558 }
2559 fclose(f2);
22569500 2560 }
a33cf58c
NIS		 2561 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2562 s = PerlIOSelf(f, PerlIOStdio);
2563 s->stdio = stdio;
2564 }
14a5cf38
JH		 2565 }
2566 return f;
9e353e3b
NIS		 2567}
2568
2569PerlIO *
14a5cf38
JH		 2570PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2571 IV n, const char *mode, int fd, int imode,
2572 int perm, PerlIO *f, int narg, SV **args)
2573{
2574 char tmode[8];
d9dac8cd 2575 if (PerlIOValid(f)) {
14a5cf38
JH		 2576 char *path = SvPV_nolen(*args);
2577 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS		 2578 FILE *stdio;
2579 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2580 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH		 2581 s->stdio);
2582 if (!s->stdio)
2583 return NULL;
2584 s->stdio = stdio;
1751d015 2585 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2586 return f;
2587 }
2588 else {
2589 if (narg > 0) {
2590 char *path = SvPV_nolen(*args);
2591 if (*mode == '#') {
2592 mode++;
2593 fd = PerlLIO_open3(path, imode, perm);
2594 }
2595 else {
2596 FILE *stdio = PerlSIO_fopen(path, mode);
2597 if (stdio) {
d9dac8cd
NIS		 2598 PerlIOStdio *s;
2599 if (!f) {
2600 f = PerlIO_allocate(aTHX);
2601 }
a33cf58c 2602 if ((f = PerlIO_push(aTHX_ f, self,
14a5cf38 2603 (mode = PerlIOStdio_mode(mode, tmode)),
a33cf58c
NIS		 2604 PerlIOArg))) {
2605 s = PerlIOSelf(f, PerlIOStdio);
2606 s->stdio = stdio;
2607 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2608 }
602c3c4b
NIS		 2609 return f;
2610 }
2611 else {
2612 return NULL;
14a5cf38 2613 }
14a5cf38
JH		 2614 }
2615 }
2616 if (fd >= 0) {
2617 FILE *stdio = NULL;
2618 int init = 0;
2619 if (*mode == 'I') {
2620 init = 1;
2621 mode++;
2622 }
2623 if (init) {
2624 switch (fd) {
2625 case 0:
2626 stdio = PerlSIO_stdin;
2627 break;
2628 case 1:
2629 stdio = PerlSIO_stdout;
2630 break;
2631 case 2:
2632 stdio = PerlSIO_stderr;
2633 break;
2634 }
2635 }
2636 else {
2637 stdio = PerlSIO_fdopen(fd, mode =
2638 PerlIOStdio_mode(mode, tmode));
2639 }
2640 if (stdio) {
d9dac8cd
NIS		 2641 PerlIOStdio *s;
2642 if (!f) {
2643 f = PerlIO_allocate(aTHX);
2644 }
a33cf58c
NIS		 2645 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2646 s = PerlIOSelf(f, PerlIOStdio);
2647 s->stdio = stdio;
2648 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2649 }
14a5cf38
JH		 2650 return f;
2651 }
2652 }
2653 }
ee518936 2654 return NULL;
9e353e3b
NIS		 2655}
2656
1751d015 2657PerlIO *
ecdeb87c 2658PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS		 2659{
2660 /* This assumes no layers underneath - which is what
2661 happens, but is not how I remember it. NI-S 2001/10/16
2662 */
ecdeb87c 2663 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2664 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
ecdeb87c
NIS		 2665 if (flags & PERLIO_DUP_FD) {
2666 int fd = PerlLIO_dup(fileno(stdio));
2667 if (fd >= 0) {
2668 char mode[8];
a33cf58c 2669 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
ecdeb87c
NIS		 2670 }
2671 else {
2672 /* FIXME: To avoid messy error recovery if dup fails
2673 re-use the existing stdio as though flag was not set
2674 */
2675 }
2676 }
694c95cf
JH		 2677 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2678 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS		 2679 }
2680 return f;
2681}
2682
2683IV
f62ce20a 2684PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2685{
1751d015
NIS		 2686#ifdef SOCKS5_VERSION_NAME
2687 int optval;
2688 Sock_size_t optlen = sizeof(int);
2689#endif
2690 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS		 2691 if (!stdio) {
2692 errno = EBADF;
2693 return -1;
2694 }
1751d015 2695 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
694c95cf 2696 /* Do not close it but do flush any buffers */
22569500 2697 return PerlIO_flush(f);
1751d015
NIS		 2698 }
2699 return (
2700#ifdef SOCKS5_VERSION_NAME
2701 (getsockopt
2702 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2703 &optlen) <
2704 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2705#else
2706 PerlSIO_fclose(stdio)
2707#endif
2708 );
2709
2710}
2711
2712
2713
9e353e3b 2714SSize_t
f62ce20a 2715PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2716{
14a5cf38
JH		 2717 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2718 SSize_t got = 0;
2719 if (count == 1) {
2720 STDCHAR *buf = (STDCHAR *) vbuf;
2721 /*
2722 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2723 * stdio does not do that for fread()
14a5cf38
JH		 2724 */
2725 int ch = PerlSIO_fgetc(s);
2726 if (ch != EOF) {
2727 *buf = ch;
2728 got = 1;
2729 }
2730 }
2731 else
2732 got = PerlSIO_fread(vbuf, 1, count, s);
2733 return got;
9e353e3b
NIS		 2734}
2735
2736SSize_t
f62ce20a 2737PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2738{
14a5cf38 2739 SSize_t unread = 0;
93679785
NIS		 2740 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2741
313e59c8 2742#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 2743 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 2744 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2745 STDCHAR *base = PerlIO_get_base(f);
2746 SSize_t cnt = PerlIO_get_cnt(f);
2747 STDCHAR *ptr = PerlIO_get_ptr(f);
2748 SSize_t avail = ptr - base;
2749 if (avail > 0) {
2750 if (avail > count) {
2751 avail = count;
2752 }
2753 ptr -= avail;
2754 Move(buf-avail,ptr,avail,STDCHAR);
2755 count -= avail;
2756 unread += avail;
2757 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS		 2758 if (PerlSIO_feof(s) && unread >= 0)
2759 PerlSIO_clearerr(s);
2760 }
2761 }
313e59c8
NIS		 2762 else
2763#endif
2764 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 2765 /* We can get pointer to buffer but not its base
2766 Do ungetc() but check chars are ending up in the
2767 buffer
2768 */
2769 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2770 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2771 while (count > 0) {
2772 int ch = *--buf & 0xFF;
2773 if (ungetc(ch,s) != ch) {
2774 /* ungetc did not work */
2775 break;
2776 }
2777 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2778 /* Did not change pointer as expected */
2779 fgetc(s); /* get char back again */
2780 break;
2781 }
2782 /* It worked ! */
2783 count--;
2784 unread++;
93679785
NIS		 2785 }
2786 }
2787
2788 if (count > 0) {
2789 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 2790 }
2791 return unread;
9e353e3b
NIS		 2792}
2793
2794SSize_t
f62ce20a 2795PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2796{
14a5cf38
JH		 2797 return PerlSIO_fwrite(vbuf, 1, count,
2798 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2799}
2800
2801IV
f62ce20a 2802PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2803{
14a5cf38
JH		 2804 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2805 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2806}
2807
2808Off_t
f62ce20a 2809PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 2810{
14a5cf38
JH		 2811 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2812 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2813}
2814
2815IV
f62ce20a 2816PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 2817{
14a5cf38
JH		 2818 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2819 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2820 return PerlSIO_fflush(stdio);
2821 }
2822 else {
88b61e10 2823#if 0
14a5cf38
JH		 2824 /*
2825 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2826 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2827 * design is to do _this_ but not have layer above flush this
71200d45 2828 * layer read-to-read
14a5cf38
JH		 2829 */
2830 /*
71200d45 2831 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2832 */
2833 int err = errno;
2834 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2835 errno = err;
88b61e10 2836#endif
14a5cf38
JH		 2837 }
2838 return 0;
9e353e3b
NIS		 2839}
2840
2841IV
f62ce20a 2842PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 2843{
14a5cf38 2844 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2845}
2846
2847IV
f62ce20a 2848PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 2849{
14a5cf38 2850 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2851}
2852
2853void
f62ce20a 2854PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 2855{
14a5cf38 2856 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2857}
2858
2859void
f62ce20a 2860PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS		 2861{
2862#ifdef HAS_SETLINEBUF
14a5cf38 2863 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2864#else
14a5cf38 2865 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2866#endif
2867}
2868
2869#ifdef FILE_base
2870STDCHAR *
f62ce20a 2871PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 2872{
14a5cf38 2873 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2874 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS		 2875}
2876
2877Size_t
f62ce20a 2878PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 2879{
14a5cf38
JH		 2880 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2881 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2882}
2883#endif
2884
2885#ifdef USE_STDIO_PTR
2886STDCHAR *
f62ce20a 2887PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 2888{
14a5cf38 2889 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2890 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2891}
2892
2893SSize_t
f62ce20a 2894PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 2895{
14a5cf38
JH		 2896 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2897 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2898}
2899
2900void
f62ce20a 2901PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2902{
14a5cf38 2903 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 2904 if (ptr != NULL) {
9e353e3b 2905#ifdef STDIO_PTR_LVALUE
22569500 2906 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 2907#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 2908 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH		 2909 assert(PerlSIO_get_cnt(stdio) == (cnt));
2910 }
9e353e3b
NIS		 2911#endif
2912#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2913 /*
71200d45 2914 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2915 */
2916 return;
9e353e3b 2917#endif
22569500 2918#else /* STDIO_PTR_LVALUE */
14a5cf38 2919 PerlProc_abort();
22569500 2920#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH		 2921 }
2922 /*
71200d45 2923 * Now (or only) set cnt
14a5cf38 2924 */
9e353e3b 2925#ifdef STDIO_CNT_LVALUE
14a5cf38 2926 PerlSIO_set_cnt(stdio, cnt);
22569500 2927#else /* STDIO_CNT_LVALUE */
9e353e3b 2928#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2929 PerlSIO_set_ptr(stdio,
2930 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2931 cnt));
22569500 2932#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 2933 PerlProc_abort();
22569500
NIS		 2934#endif /* STDIO_PTR_LVAL_SETS_CNT */
2935#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2936}
2937
93679785 2938
9e353e3b
NIS		 2939#endif
2940
93679785
NIS		 2941IV
2942PerlIOStdio_fill(pTHX_ PerlIO *f)
2943{
2944 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2945 int c;
2946 /*
2947 * fflush()ing read-only streams can cause trouble on some stdio-s
2948 */
2949 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2950 if (PerlSIO_fflush(stdio) != 0)
2951 return EOF;
2952 }
2953 c = PerlSIO_fgetc(stdio);
2954 if (c == EOF)
2955 return EOF;
2956
2957#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS		 2958
2959#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 2960 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 2961 /* Fake ungetc() to the real buffer in case system's ungetc
2962 goes elsewhere
2963 */
2964 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2965 SSize_t cnt = PerlSIO_get_cnt(stdio);
2966 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2967 if (ptr == base+1) {
2968 *--ptr = (STDCHAR) c;
2969 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2970 if (PerlSIO_feof(stdio))
2971 PerlSIO_clearerr(stdio);
2972 return 0;
2973 }
2974 }
313e59c8
NIS		 2975 else
2976#endif
2977 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 2978 STDCHAR ch = c;
2979 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2980 return 0;
2981 }
2982 }
93679785
NIS		 2983#endif
2984
2985#if defined(VMS)
2986 /* An ungetc()d char is handled separately from the regular
2987 * buffer, so we stuff it in the buffer ourselves.
2988 * Should never get called as should hit code above
2989 */
bad9695d
NIS		 2990 *(--((*stdio)->_ptr)) = (unsigned char) c;
2991 (*stdio)->_cnt++;
93679785
NIS		 2992#else
2993 /* If buffer snoop scheme above fails fall back to
9f7cd136 2994 using ungetc().
93679785
NIS		 2995 */
2996 if (PerlSIO_ungetc(c, stdio) != c)
2997 return EOF;
2998#endif
2999 return 0;
3000}
3001
3002
3003
9e353e3b 3004PerlIO_funcs PerlIO_stdio = {
2dc2558e 3005 sizeof(PerlIO_funcs),
14a5cf38
JH		 3006 "stdio",
3007 sizeof(PerlIOStdio),
86e05cf2 3008 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3009 PerlIOStdio_pushed,
44798d05 3010 PerlIOBase_popped,
14a5cf38 3011 PerlIOStdio_open,
86e05cf2 3012 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3013 NULL,
3014 PerlIOStdio_fileno,
71200d45 3015 PerlIOStdio_dup,
14a5cf38
JH		 3016 PerlIOStdio_read,
3017 PerlIOStdio_unread,
3018 PerlIOStdio_write,
3019 PerlIOStdio_seek,
3020 PerlIOStdio_tell,
3021 PerlIOStdio_close,
3022 PerlIOStdio_flush,
3023 PerlIOStdio_fill,
3024 PerlIOStdio_eof,
3025 PerlIOStdio_error,
3026 PerlIOStdio_clearerr,
3027 PerlIOStdio_setlinebuf,
9e353e3b 3028#ifdef FILE_base
14a5cf38
JH		 3029 PerlIOStdio_get_base,
3030 PerlIOStdio_get_bufsiz,
9e353e3b 3031#else
14a5cf38
JH		 3032 NULL,
3033 NULL,
9e353e3b
NIS		 3034#endif
3035#ifdef USE_STDIO_PTR
14a5cf38
JH		 3036 PerlIOStdio_get_ptr,
3037 PerlIOStdio_get_cnt,
0eb1d8a4 3038#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38 3039 PerlIOStdio_set_ptrcnt
22569500 3040#else /* STDIO_PTR_LVALUE */
14a5cf38 3041 NULL
22569500
NIS		 3042#endif /* STDIO_PTR_LVALUE */
3043#else /* USE_STDIO_PTR */
14a5cf38
JH		 3044 NULL,
3045 NULL,
3046 NULL
22569500 3047#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 3048};
3049
b9d6bf13
JH		 3050/* Note that calls to PerlIO_exportFILE() are reversed using
3051 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3052FILE *
81428673 3053PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3054{
e87a358a 3055 dTHX;
81428673
NIS		 3056 FILE *stdio = NULL;
3057 if (PerlIOValid(f)) {
3058 char buf[8];
3059 PerlIO_flush(f);
3060 if (!mode || !*mode) {
3061 mode = PerlIO_modestr(f, buf);
3062 }
3063 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3064 if (stdio) {
3065 PerlIOl *l = *f;
3066 /* De-link any lower layers so new :stdio sticks */
3067 *f = NULL;
3068 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3069 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3070 s->stdio = stdio;
3071 /* Link previous lower layers under new one */
3072 *PerlIONext(f) = l;
3073 }
3074 else {
3075 /* restore layers list */
3076 *f = l;
3077 }
a33cf58c 3078 }
14a5cf38
JH		 3079 }
3080 return stdio;
9e353e3b
NIS		 3081}
3082
81428673 3083
9e353e3b
NIS		 3084FILE *
3085PerlIO_findFILE(PerlIO *f)
3086{
14a5cf38
JH		 3087 PerlIOl *l = *f;
3088 while (l) {
3089 if (l->tab == &PerlIO_stdio) {
3090 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3091 return s->stdio;
3092 }
3093 l = *PerlIONext(&l);
f7e7eb72 3094 }
4b069b44
NIS		 3095 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3096 return PerlIO_exportFILE(f, Nullch);
9e353e3b
NIS		 3097}
3098
b9d6bf13 3099/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS		 3100void
3101PerlIO_releaseFILE(PerlIO *p, FILE *f)
3102{
22569500
NIS		 3103 PerlIOl *l;
3104 while ((l = *p)) {
3105 if (l->tab == &PerlIO_stdio) {
3106 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3107 if (s->stdio == f) {
3108 dTHX;
3109 PerlIO_pop(aTHX_ p);
3110 return;
3111 }
3112 }
3113 p = PerlIONext(p);
3114 }
3115 return;
9e353e3b
NIS		 3116}
3117
3118/*--------------------------------------------------------------------------------------*/
14a5cf38 3119/*
71200d45 3120 * perlio buffer layer
14a5cf38 3121 */
9e353e3b 3122
5e2ab84b 3123IV
2dc2558e 3124PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3125{
14a5cf38
JH		 3126 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3127 int fd = PerlIO_fileno(f);
14a5cf38
JH		 3128 if (fd >= 0 && PerlLIO_isatty(fd)) {
3129 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3130 }
4b069b44
NIS		 3131 if (*PerlIONext(f)) {
3132 Off_t posn = PerlIO_tell(PerlIONext(f));
3133 if (posn != (Off_t) - 1) {
3134 b->posn = posn;
3135 }
14a5cf38 3136 }
2dc2558e 3137 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS		 3138}
3139
9e353e3b 3140PerlIO *
14a5cf38
JH		 3141PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3142 IV n, const char *mode, int fd, int imode, int perm,
3143 PerlIO *f, int narg, SV **args)
3144{
04892f78 3145 if (PerlIOValid(f)) {
14a5cf38 3146 PerlIO *next = PerlIONext(f);
04892f78
NIS		 3147 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3148 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
14a5cf38 3149 next, narg, args);
2dc2558e 3150 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH		 3151 return NULL;
3152 }
3153 }
3154 else {
04892f78 3155 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38
JH		 3156 int init = 0;
3157 if (*mode == 'I') {
3158 init = 1;
3159 /*
71200d45 3160 * mode++;
14a5cf38
JH		 3161 */
3162 }
3163 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
d9dac8cd 3164 f, narg, args);
14a5cf38 3165 if (f) {
22569500 3166 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC		 3167 /*
3168 * if push fails during open, open fails. close will pop us.
3169 */
3170 PerlIO_close (f);
3171 return NULL;
3172 } else {
3173 fd = PerlIO_fileno(f);
b26b1ab5
NC		 3174 if (init && fd == 2) {
3175 /*
3176 * Initial stderr is unbuffered
3177 */
3178 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3179 }
23b84778
IZ		 3180#ifdef PERLIO_USING_CRLF
3181# ifdef PERLIO_IS_BINMODE_FD
3182 if (PERLIO_IS_BINMODE_FD(fd))
3183 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3184 else
3185# endif
3186 /*
3187 * do something about failing setmode()? --jhi
3188 */
3189 PerlLIO_setmode(fd, O_BINARY);
3190#endif
14a5cf38
JH		 3191 }
3192 }
ee518936 3193 }
14a5cf38 3194 return f;
9e353e3b
NIS		 3195}
3196
14a5cf38
JH		 3197/*
3198 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 3199 * read or write state
14a5cf38 3200 */
9e353e3b 3201IV
f62ce20a 3202PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3203{
14a5cf38
JH		 3204 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3205 int code = 0;
04892f78 3206 PerlIO *n = PerlIONext(f);
14a5cf38
JH		 3207 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3208 /*
71200d45 3209 * write() the buffer
14a5cf38
JH		 3210 */
3211 STDCHAR *buf = b->buf;
3212 STDCHAR *p = buf;
14a5cf38
JH		 3213 while (p < b->ptr) {
3214 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3215 if (count > 0) {
3216 p += count;
3217 }
3218 else if (count < 0 || PerlIO_error(n)) {
3219 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3220 code = -1;
3221 break;
3222 }
3223 }
3224 b->posn += (p - buf);
3225 }
3226 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3227 STDCHAR *buf = PerlIO_get_base(f);
3228 /*
71200d45 3229 * Note position change
14a5cf38
JH		 3230 */
3231 b->posn += (b->ptr - buf);
3232 if (b->ptr < b->end) {
4b069b44
NIS		 3233 /* We did not consume all of it - try and seek downstream to
3234 our logical position
14a5cf38 3235 */
4b069b44 3236 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS		 3237 /* Reload n as some layers may pop themselves on seek */
3238 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3239 }
ba5c3fe9 3240 else {
4b069b44
NIS		 3241 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3242 data is lost for good - so return saying "ok" having undone
3243 the position adjust
3244 */
3245 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS		 3246 return code;
3247 }
14a5cf38
JH		 3248 }
3249 }
3250 b->ptr = b->end = b->buf;
3251 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3252 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3253 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH		 3254 code = -1;
3255 return code;
6f9d8c32
NIS		 3256}
3257
06da4f11 3258IV
f62ce20a 3259PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 3260{
14a5cf38
JH		 3261 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3262 PerlIO *n = PerlIONext(f);
3263 SSize_t avail;
3264 /*
4b069b44
NIS		 3265 * Down-stream flush is defined not to loose read data so is harmless.
3266 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38
JH		 3267 */
3268 if (PerlIO_flush(f) != 0)
3269 return -1;
3270 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 3271 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH		 3272
3273 if (!b->buf)
22569500 3274 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38
JH		 3275
3276 b->ptr = b->end = b->buf;
4b069b44
NIS		 3277
3278 if (!PerlIOValid(n)) {
3279 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3280 return -1;
3281 }
3282
14a5cf38
JH		 3283 if (PerlIO_fast_gets(n)) {
3284 /*
04892f78 3285 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH		 3286 * ->Read() because that will loop till it gets what we asked for
3287 * which may hang on a pipe etc. Instead take anything it has to
71200d45 3288 * hand, or ask it to fill _once_.
14a5cf38
JH		 3289 */
3290 avail = PerlIO_get_cnt(n);
3291 if (avail <= 0) {
3292 avail = PerlIO_fill(n);
3293 if (avail == 0)
3294 avail = PerlIO_get_cnt(n);
3295 else {
3296 if (!PerlIO_error(n) && PerlIO_eof(n))
3297 avail = 0;
3298 }
3299 }
3300 if (avail > 0) {
3301 STDCHAR *ptr = PerlIO_get_ptr(n);
3302 SSize_t cnt = avail;
eb160463 3303 if (avail > (SSize_t)b->bufsiz)
14a5cf38
JH		 3304 avail = b->bufsiz;
3305 Copy(ptr, b->buf, avail, STDCHAR);
3306 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3307 }
3308 }
3309 else {
3310 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3311 }
3312 if (avail <= 0) {
3313 if (avail == 0)
3314 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3315 else
3316 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3317 return -1;
3318 }
3319 b->end = b->buf + avail;
3320 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3321 return 0;
06da4f11
NIS		 3322}
3323
6f9d8c32 3324SSize_t
f62ce20a 3325PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 3326{
14a5cf38 3327 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
04892f78 3328 if (PerlIOValid(f)) {
14a5cf38
JH		 3329 if (!b->ptr)
3330 PerlIO_get_base(f);
f62ce20a 3331 return PerlIOBase_read(aTHX_ f, vbuf, count);
14a5cf38
JH		 3332 }
3333 return 0;
6f9d8c32
NIS		 3334}
3335
9e353e3b 3336SSize_t
f62ce20a 3337PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3338{
14a5cf38
JH		 3339 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3340 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3341 SSize_t unread = 0;
3342 SSize_t avail;
3343 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3344 PerlIO_flush(f);
3345 if (!b->buf)
3346 PerlIO_get_base(f);
3347 if (b->buf) {
3348 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3349 /*
3350 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3351 * which have been read back to buffer start
14a5cf38
JH		 3352 */
3353 avail = (b->ptr - b->buf);
3354 }
3355 else {
3356 /*
3357 * Buffer is idle, set it up so whole buffer is available for
71200d45 3358 * unread
14a5cf38
JH		 3359 */
3360 avail = b->bufsiz;
3361 b->end = b->buf + avail;
3362 b->ptr = b->end;
3363 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3364 /*
71200d45 3365 * Buffer extends _back_ from where we are now
14a5cf38
JH		 3366 */
3367 b->posn -= b->bufsiz;
3368 }
3369 if (avail > (SSize_t) count) {
3370 /*
71200d45 3371 * If we have space for more than count, just move count
14a5cf38
JH		 3372 */
3373 avail = count;
3374 }
3375 if (avail > 0) {
3376 b->ptr -= avail;
3377 buf -= avail;
3378 /*
3379 * In simple stdio-like ungetc() case chars will be already
71200d45 3380 * there
14a5cf38
JH		 3381 */
3382 if (buf != b->ptr) {
3383 Copy(buf, b->ptr, avail, STDCHAR);
3384 }
3385 count -= avail;
3386 unread += avail;
3387 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3388 }
3389 }
93679785
NIS		 3390 if (count > 0) {
3391 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3392 }
14a5cf38 3393 return unread;
760ac839
LW		 3394}
3395
9e353e3b 3396SSize_t
f62ce20a 3397PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3398{
14a5cf38
JH		 3399 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3400 const STDCHAR *buf = (const STDCHAR *) vbuf;
3401 Size_t written = 0;
3402 if (!b->buf)
3403 PerlIO_get_base(f);
3404 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3405 return 0;
3406 while (count > 0) {
3407 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3408 if ((SSize_t) count < avail)
3409 avail = count;
3410 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3411 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3412 while (avail > 0) {
3413 int ch = *buf++;
3414 *(b->ptr)++ = ch;
3415 count--;
3416 avail--;
3417 written++;
3418 if (ch == '\n') {
3419 PerlIO_flush(f);
3420 break;
3421 }
3422 }
3423 }
3424 else {
3425 if (avail) {
3426 Copy(buf, b->ptr, avail, STDCHAR);
3427 count -= avail;
3428 buf += avail;
3429 written += avail;
3430 b->ptr += avail;
3431 }
3432 }
3433 if (b->ptr >= (b->buf + b->bufsiz))
3434 PerlIO_flush(f);
3435 }
3436 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3437 PerlIO_flush(f);
3438 return written;
9e353e3b
NIS		 3439}
3440
3441IV
f62ce20a 3442PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3443{
14a5cf38
JH		 3444 IV code;
3445 if ((code = PerlIO_flush(f)) == 0) {
3446 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3447 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3448 code = PerlIO_seek(PerlIONext(f), offset, whence);
3449 if (code == 0) {
3450 b->posn = PerlIO_tell(PerlIONext(f));
3451 }
9e353e3b 3452 }
14a5cf38 3453 return code;
9e353e3b
NIS		 3454}
3455
3456Off_t
f62ce20a 3457PerlIOBuf_tell(pTHX_ PerlIO *f)
9e353e3b 3458{
14a5cf38
JH		 3459 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3460 /*
71200d45 3461 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3462 */
3463 Off_t posn = b->posn;
3464 if (b->buf) {
3465 /*
71200d45 3466 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3467 */
3468 posn += (b->ptr - b->buf);
3469 }
3470 return posn;
9e353e3b
NIS		 3471}
3472
3473IV
44798d05
NIS		 3474PerlIOBuf_popped(pTHX_ PerlIO *f)
3475{
3476 IV code = PerlIOBase_popped(aTHX_ f);
3477 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3478 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3479 Safefree(b->buf);
3480 }
3481 b->buf = NULL;
3482 b->ptr = b->end = b->buf;
3483 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3484 return code;
3485}
3486
3487IV
f62ce20a 3488PerlIOBuf_close(pTHX_ PerlIO *f)
9e353e3b 3489{
f62ce20a 3490 IV code = PerlIOBase_close(aTHX_ f);
14a5cf38
JH		 3491 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3492 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3493 Safefree(b->buf);
14a5cf38
JH		 3494 }
3495 b->buf = NULL;
3496 b->ptr = b->end = b->buf;
3497 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3498 return code;
760ac839
LW		 3499}
3500
9e353e3b 3501STDCHAR *
f62ce20a 3502PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3503{
14a5cf38
JH		 3504 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3505 if (!b->buf)
3506 PerlIO_get_base(f);
3507 return b->ptr;
9e353e3b
NIS		 3508}
3509
05d1247b 3510SSize_t
f62ce20a 3511PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3512{
14a5cf38
JH		 3513 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3514 if (!b->buf)
3515 PerlIO_get_base(f);
3516 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3517 return (b->end - b->ptr);
3518 return 0;
9e353e3b
NIS		 3519}
3520
3521STDCHAR *
f62ce20a 3522PerlIOBuf_get_base(pTHX_ PerlIO *f)
9e353e3b 3523{
14a5cf38
JH		 3524 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3525 if (!b->buf) {
3526 if (!b->bufsiz)
3527 b->bufsiz = 4096;
a1ea730d 3528 b->buf =
7fcdafbd 3529 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3530 if (!b->buf) {
3531 b->buf = (STDCHAR *) & b->oneword;
3532 b->bufsiz = sizeof(b->oneword);
3533 }
3534 b->ptr = b->buf;
3535 b->end = b->ptr;
06da4f11 3536 }
14a5cf38 3537 return b->buf;
9e353e3b
NIS		 3538}
3539
3540Size_t
f62ce20a 3541PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3542{
14a5cf38
JH		 3543 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3544 if (!b->buf)
3545 PerlIO_get_base(f);
3546 return (b->end - b->buf);
9e353e3b
NIS		 3547}
3548
3549void
f62ce20a 3550PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3551{
14a5cf38
JH		 3552 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3553 if (!b->buf)
3554 PerlIO_get_base(f);
3555 b->ptr = ptr;
3556 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
14a5cf38
JH		 3557 assert(PerlIO_get_cnt(f) == cnt);
3558 assert(b->ptr >= b->buf);
3559 }
3560 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3561}
3562
71200d45 3563PerlIO *
ecdeb87c 3564PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 3565{
ecdeb87c 3566 return PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 3567}
3568
3569
3570
9e353e3b 3571PerlIO_funcs PerlIO_perlio = {
2dc2558e 3572 sizeof(PerlIO_funcs),
14a5cf38
JH		 3573 "perlio",
3574 sizeof(PerlIOBuf),
86e05cf2 3575 PERLIO_K_BUFFERED|PERLIO_K_RAW,
14a5cf38 3576 PerlIOBuf_pushed,
44798d05 3577 PerlIOBuf_popped,
14a5cf38 3578 PerlIOBuf_open,
86e05cf2 3579 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3580 NULL,
3581 PerlIOBase_fileno,
71200d45 3582 PerlIOBuf_dup,
14a5cf38
JH		 3583 PerlIOBuf_read,
3584 PerlIOBuf_unread,
3585 PerlIOBuf_write,
3586 PerlIOBuf_seek,
3587 PerlIOBuf_tell,
3588 PerlIOBuf_close,
3589 PerlIOBuf_flush,
3590 PerlIOBuf_fill,
3591 PerlIOBase_eof,
3592 PerlIOBase_error,
3593 PerlIOBase_clearerr,
3594 PerlIOBase_setlinebuf,
3595 PerlIOBuf_get_base,
3596 PerlIOBuf_bufsiz,
3597 PerlIOBuf_get_ptr,
3598 PerlIOBuf_get_cnt,
3599 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3600};
3601
66ecd56b 3602/*--------------------------------------------------------------------------------------*/
14a5cf38 3603/*
71200d45 3604 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3605 */
5e2ab84b
NIS		 3606
3607IV
f62ce20a 3608PerlIOPending_fill(pTHX_ PerlIO *f)
5e2ab84b 3609{
14a5cf38 3610 /*
71200d45 3611 * Should never happen
14a5cf38
JH		 3612 */
3613 PerlIO_flush(f);
3614 return 0;
5e2ab84b
NIS		 3615}
3616
3617IV
f62ce20a 3618PerlIOPending_close(pTHX_ PerlIO *f)
5e2ab84b 3619{
14a5cf38 3620 /*
71200d45 3621 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3622 */
3623 PerlIO_flush(f);
3624 return PerlIO_close(f);
5e2ab84b
NIS		 3625}
3626
3627IV
f62ce20a 3628PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
5e2ab84b 3629{
14a5cf38 3630 /*
71200d45 3631 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3632 */
3633 PerlIO_flush(f);
3634 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3635}
3636
3637
3638IV
f62ce20a 3639PerlIOPending_flush(pTHX_ PerlIO *f)
5e2ab84b 3640{
14a5cf38
JH		 3641 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3642 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3643 Safefree(b->buf);
14a5cf38
JH		 3644 b->buf = NULL;
3645 }
3646 PerlIO_pop(aTHX_ f);
3647 return 0;
5e2ab84b
NIS		 3648}
3649
3650void
f62ce20a 3651PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3652{
14a5cf38
JH		 3653 if (cnt <= 0) {
3654 PerlIO_flush(f);
3655 }
3656 else {
f62ce20a 3657 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
14a5cf38 3658 }
5e2ab84b
NIS		 3659}
3660
3661IV
2dc2558e 3662PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3663{
2dc2558e 3664 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38
JH		 3665 PerlIOl *l = PerlIOBase(f);
3666 /*
71200d45
NIS		 3667 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3668 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3669 */
3670 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3671 (PerlIOBase(PerlIONext(f))->
3672 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3673 return code;
5e2ab84b
NIS		 3674}
3675
3676SSize_t
f62ce20a 3677PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
5e2ab84b 3678{
14a5cf38
JH		 3679 SSize_t avail = PerlIO_get_cnt(f);
3680 SSize_t got = 0;
eb160463 3681 if ((SSize_t)count < avail)
14a5cf38
JH		 3682 avail = count;
3683 if (avail > 0)
f62ce20a 3684 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
eb160463 3685 if (got >= 0 && got < (SSize_t)count) {
14a5cf38
JH		 3686 SSize_t more =
3687 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3688 if (more >= 0 || got == 0)
3689 got += more;
3690 }
3691 return got;
5e2ab84b
NIS		 3692}
3693
5e2ab84b 3694PerlIO_funcs PerlIO_pending = {
2dc2558e 3695 sizeof(PerlIO_funcs),
14a5cf38
JH		 3696 "pending",
3697 sizeof(PerlIOBuf),
86e05cf2 3698 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
14a5cf38 3699 PerlIOPending_pushed,
44798d05 3700 PerlIOBuf_popped,
14a5cf38 3701 NULL,
86e05cf2 3702 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3703 NULL,
3704 PerlIOBase_fileno,
71200d45 3705 PerlIOBuf_dup,
14a5cf38
JH		 3706 PerlIOPending_read,
3707 PerlIOBuf_unread,
3708 PerlIOBuf_write,
3709 PerlIOPending_seek,
3710 PerlIOBuf_tell,
3711 PerlIOPending_close,
3712 PerlIOPending_flush,
3713 PerlIOPending_fill,
3714 PerlIOBase_eof,
3715 PerlIOBase_error,
3716 PerlIOBase_clearerr,
3717 PerlIOBase_setlinebuf,
3718 PerlIOBuf_get_base,
3719 PerlIOBuf_bufsiz,
3720 PerlIOBuf_get_ptr,
3721 PerlIOBuf_get_cnt,
3722 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3723};
3724
3725
3726
3727/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3728/*
3729 * crlf - translation On read translate CR,LF to "\n" we do this by
3730 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3731 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3732 */
3733
14a5cf38 3734typedef struct {
22569500
NIS		 3735 PerlIOBuf base; /* PerlIOBuf stuff */
3736 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3737 * buffer */
99efab12
NIS		 3738} PerlIOCrlf;
3739
f5b9d040 3740IV
2dc2558e 3741PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
f5b9d040 3742{
14a5cf38
JH		 3743 IV code;
3744 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
2dc2558e 3745 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b 3746#if 0
14a5cf38
JH		 3747 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3748 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3749 PerlIOBase(f)->flags);
5e2ab84b 3750#endif
14a5cf38 3751 return code;
f5b9d040
NIS		 3752}
3753
3754
99efab12 3755SSize_t
f62ce20a 3756PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 3757{
14a5cf38
JH		 3758 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3759 if (c->nl) {
3760 *(c->nl) = 0xd;
3761 c->nl = NULL;
3762 }
3763 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 3764 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 3765 else {
3766 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3767 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3768 SSize_t unread = 0;
3769 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3770 PerlIO_flush(f);
3771 if (!b->buf)
3772 PerlIO_get_base(f);
3773 if (b->buf) {
3774 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3775 b->end = b->ptr = b->buf + b->bufsiz;
3776 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3777 b->posn -= b->bufsiz;
3778 }
3779 while (count > 0 && b->ptr > b->buf) {
3780 int ch = *--buf;
3781 if (ch == '\n') {
3782 if (b->ptr - 2 >= b->buf) {
3783 *--(b->ptr) = 0xa;
3784 *--(b->ptr) = 0xd;
3785 unread++;
3786 count--;
3787 }
3788 else {
3789 buf++;
3790 break;
3791 }
3792 }
3793 else {
3794 *--(b->ptr) = ch;
3795 unread++;
3796 count--;
3797 }
3798 }
3799 }
3800 return unread;
3801 }
99efab12
NIS		 3802}
3803
3804SSize_t
f62ce20a 3805PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
99efab12 3806{
14a5cf38
JH		 3807 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3808 if (!b->buf)
3809 PerlIO_get_base(f);
3810 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3811 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
23b3c6af
NIS		 3812 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3813 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
14a5cf38
JH		 3814 scan:
3815 while (nl < b->end && *nl != 0xd)
3816 nl++;
3817 if (nl < b->end && *nl == 0xd) {
3818 test:
3819 if (nl + 1 < b->end) {
3820 if (nl[1] == 0xa) {
3821 *nl = '\n';
3822 c->nl = nl;
3823 }
3824 else {
3825 /*
71200d45 3826 * Not CR,LF but just CR
14a5cf38
JH		 3827 */
3828 nl++;
3829 goto scan;
3830 }
3831 }
3832 else {
3833 /*
71200d45 3834 * Blast - found CR as last char in buffer
14a5cf38 3835 */
e87a358a 3836
14a5cf38
JH		 3837 if (b->ptr < nl) {
3838 /*
3839 * They may not care, defer work as long as
71200d45 3840 * possible
14a5cf38 3841 */
a0d1d361 3842 c->nl = nl;
14a5cf38
JH		 3843 return (nl - b->ptr);
3844 }
3845 else {
3846 int code;
22569500 3847 b->ptr++; /* say we have read it as far as
14a5cf38 3848 * flush() is concerned */
22569500 3849 b->buf++; /* Leave space in front of buffer */
e949e37c
NIS		 3850 /* Note as we have moved buf up flush's
3851 posn += ptr-buf
3852 will naturally make posn point at CR
3853 */
22569500
NIS		 3854 b->bufsiz--; /* Buffer is thus smaller */
3855 code = PerlIO_fill(f); /* Fetch some more */
3856 b->bufsiz++; /* Restore size for next time */
3857 b->buf--; /* Point at space */
3858 b->ptr = nl = b->buf; /* Which is what we hand
14a5cf38 3859 * off */
22569500 3860 *nl = 0xd; /* Fill in the CR */
14a5cf38 3861 if (code == 0)
22569500 3862 goto test; /* fill() call worked */
14a5cf38 3863 /*
71200d45 3864 * CR at EOF - just fall through
14a5cf38 3865 */
a0d1d361 3866 /* Should we clear EOF though ??? */
14a5cf38
JH		 3867 }
3868 }
3869 }
3870 }
3871 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3872 }
3873 return 0;
99efab12
NIS		 3874}
3875
3876void
f62ce20a 3877PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
14a5cf38
JH		 3878{
3879 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3880 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
14a5cf38
JH		 3881 if (!b->buf)
3882 PerlIO_get_base(f);
3883 if (!ptr) {
a0d1d361 3884 if (c->nl) {
14a5cf38 3885 ptr = c->nl + 1;
22569500 3886 if (ptr == b->end && *c->nl == 0xd) {
a0d1d361 3887 /* Defered CR at end of buffer case - we lied about count */
22569500
NIS		 3888 ptr--;
3889 }
3890 }
14a5cf38
JH		 3891 else {
3892 ptr = b->end;
14a5cf38
JH		 3893 }
3894 ptr -= cnt;
3895 }
3896 else {
3b4bd3fd 3897#if 0
14a5cf38 3898 /*
71200d45 3899 * Test code - delete when it works ...
14a5cf38 3900 */
3b4bd3fd 3901 IV flags = PerlIOBase(f)->flags;
ba7abf9d 3902 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
22569500 3903 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
a0d1d361
NIS		 3904 /* Defered CR at end of buffer case - we lied about count */
3905 chk--;
22569500 3906 }
14a5cf38
JH		 3907 chk -= cnt;
3908
a0d1d361 3909 if (ptr != chk ) {
99ef548b 3910 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
14a5cf38
JH		 3911 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3912 b->end, cnt);
3913 }
99ef548b 3914#endif
14a5cf38
JH		 3915 }
3916 if (c->nl) {
3917 if (ptr > c->nl) {
3918 /*
71200d45 3919 * They have taken what we lied about
14a5cf38
JH		 3920 */
3921 *(c->nl) = 0xd;
3922 c->nl = NULL;
3923 ptr++;
3924 }
3925 }
3926 b->ptr = ptr;
3927 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3928}
3929
3930SSize_t
f62ce20a 3931PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 3932{
14a5cf38 3933 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 3934 return PerlIOBuf_write(aTHX_ f, vbuf, count);
14a5cf38
JH		 3935 else {
3936 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3937 const STDCHAR *buf = (const STDCHAR *) vbuf;
3938 const STDCHAR *ebuf = buf + count;
3939 if (!b->buf)
3940 PerlIO_get_base(f);
3941 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3942 return 0;
3943 while (buf < ebuf) {
3944 STDCHAR *eptr = b->buf + b->bufsiz;
3945 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3946 while (buf < ebuf && b->ptr < eptr) {
3947 if (*buf == '\n') {
3948 if ((b->ptr + 2) > eptr) {
3949 /*
71200d45 3950 * Not room for both
14a5cf38
JH		 3951 */
3952 PerlIO_flush(f);
3953 break;
3954 }
3955 else {
22569500
NIS		 3956 *(b->ptr)++ = 0xd; /* CR */
3957 *(b->ptr)++ = 0xa; /* LF */
14a5cf38
JH		 3958 buf++;
3959 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3960 PerlIO_flush(f);
3961 break;
3962 }
3963 }
3964 }
3965 else {
3966 int ch = *buf++;
3967 *(b->ptr)++ = ch;
3968 }
3969 if (b->ptr >= eptr) {
3970 PerlIO_flush(f);
3971 break;
3972 }
3973 }
3974 }
3975 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3976 PerlIO_flush(f);
3977 return (buf - (STDCHAR *) vbuf);
3978 }
99efab12
NIS		 3979}
3980
3981IV
f62ce20a 3982PerlIOCrlf_flush(pTHX_ PerlIO *f)
99efab12 3983{
14a5cf38
JH		 3984 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3985 if (c->nl) {
3986 *(c->nl) = 0xd;
3987 c->nl = NULL;
3988 }
f62ce20a 3989 return PerlIOBuf_flush(aTHX_ f);
99efab12
NIS		 3990}
3991
86e05cf2
NIS		 3992IV
3993PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3994{
3995 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3996 /* In text mode - flush any pending stuff and flip it */
3997 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3998#ifndef PERLIO_USING_CRLF
3999 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4000 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4001 PerlIO_pop(aTHX_ f);
4002 }
4003#endif
4004 }
4005 return 0;
4006}
4007
66ecd56b 4008PerlIO_funcs PerlIO_crlf = {
2dc2558e 4009 sizeof(PerlIO_funcs),
14a5cf38
JH		 4010 "crlf",
4011 sizeof(PerlIOCrlf),
86e05cf2 4012 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
14a5cf38 4013 PerlIOCrlf_pushed,
44798d05 4014 PerlIOBuf_popped, /* popped */
14a5cf38 4015 PerlIOBuf_open,
86e05cf2 4016 PerlIOCrlf_binmode, /* binmode */
14a5cf38
JH		 4017 NULL,
4018 PerlIOBase_fileno,
71200d45 4019 PerlIOBuf_dup,
22569500 4020 PerlIOBuf_read, /* generic read works with ptr/cnt lies
14a5cf38 4021 * ... */
22569500
NIS		 4022 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4023 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
14a5cf38
JH		 4024 PerlIOBuf_seek,
4025 PerlIOBuf_tell,
4026 PerlIOBuf_close,
4027 PerlIOCrlf_flush,
4028 PerlIOBuf_fill,
4029 PerlIOBase_eof,
4030 PerlIOBase_error,
4031 PerlIOBase_clearerr,
4032 PerlIOBase_setlinebuf,
4033 PerlIOBuf_get_base,
4034 PerlIOBuf_bufsiz,
4035 PerlIOBuf_get_ptr,
4036 PerlIOCrlf_get_cnt,
4037 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 4038};
4039
06da4f11
NIS		 4040#ifdef HAS_MMAP
4041/*--------------------------------------------------------------------------------------*/
14a5cf38 4042/*
71200d45 4043 * mmap as "buffer" layer
14a5cf38 4044 */
06da4f11 4045
14a5cf38 4046typedef struct {
22569500
NIS		 4047 PerlIOBuf base; /* PerlIOBuf stuff */
4048 Mmap_t mptr; /* Mapped address */
4049 Size_t len; /* mapped length */
4050 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 4051} PerlIOMmap;
4052
c3d7c7c9
NIS		 4053static size_t page_size = 0;
4054
06da4f11 4055IV
f62ce20a 4056PerlIOMmap_map(pTHX_ PerlIO *f)
06da4f11 4057{
14a5cf38
JH		 4058 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4059 IV flags = PerlIOBase(f)->flags;
4060 IV code = 0;
4061 if (m->len)
4062 abort();
4063 if (flags & PERLIO_F_CANREAD) {
4064 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4065 int fd = PerlIO_fileno(f);
10eefe7f
CB		 4066 Stat_t st;
4067 code = Fstat(fd, &st);
14a5cf38
JH		 4068 if (code == 0 && S_ISREG(st.st_mode)) {
4069 SSize_t len = st.st_size - b->posn;
4070 if (len > 0) {
4071 Off_t posn;
4072 if (!page_size) {
68d873c6 4073#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38 4074 {
93189314 4075 SETERRNO(0, SS_NORMAL);
68d873c6 4076# ifdef _SC_PAGESIZE
14a5cf38 4077 page_size = sysconf(_SC_PAGESIZE);
68d873c6 4078# else
14a5cf38 4079 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 4080# endif
14a5cf38
JH		 4081 if ((long) page_size < 0) {
4082 if (errno) {
4083 SV *error = ERRSV;
4084 char *msg;
4085 STRLEN n_a;
4086 (void) SvUPGRADE(error, SVt_PV);
4087 msg = SvPVx(error, n_a);
4088 Perl_croak(aTHX_ "panic: sysconf: %s",
4089 msg);
4090 }
4091 else
4092 Perl_croak(aTHX_
4093 "panic: sysconf: pagesize unknown");
4094 }
4095 }
68d873c6
JH		 4096#else
4097# ifdef HAS_GETPAGESIZE
14a5cf38 4098 page_size = getpagesize();
68d873c6
JH		 4099# else
4100# if defined(I_SYS_PARAM) && defined(PAGESIZE)
22569500 4101 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 4102# endif
4103# endif
4104#endif
14a5cf38
JH		 4105 if ((IV) page_size <= 0)
4106 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4107 (IV) page_size);
4108 }
4109 if (b->posn < 0) {
4110 /*
4111 * This is a hack - should never happen - open should
71200d45 4112 * have set it !
14a5cf38
JH		 4113 */
4114 b->posn = PerlIO_tell(PerlIONext(f));
4115 }
4116 posn = (b->posn / page_size) * page_size;
4117 len = st.st_size - posn;
4118 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4119 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 4120#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 4121 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 4122#endif
a5262162 4123#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 4124 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 4125#endif
14a5cf38
JH		 4126 PerlIOBase(f)->flags =
4127 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4128 b->end = ((STDCHAR *) m->mptr) + len;
4129 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4130 b->ptr = b->buf;
4131 m->len = len;
4132 }
4133 else {
4134 b->buf = NULL;
4135 }
4136 }
4137 else {
4138 PerlIOBase(f)->flags =
4139 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4140 b->buf = NULL;
4141 b->ptr = b->end = b->ptr;
4142 code = -1;
4143 }
4144 }
4145 }
4146 return code;
06da4f11
NIS		 4147}
4148
4149IV
e87a358a 4150PerlIOMmap_unmap(pTHX_ PerlIO *f)
06da4f11 4151{
14a5cf38
JH		 4152 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4153 PerlIOBuf *b = &m->base;
4154 IV code = 0;
4155 if (m->len) {
4156 if (b->buf) {
4157 code = munmap(m->mptr, m->len);
4158 b->buf = NULL;
4159 m->len = 0;
4160 m->mptr = NULL;
4161 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4162 code = -1;
4163 }
4164 b->ptr = b->end = b->buf;
4165 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4166 }
4167 return code;
06da4f11
NIS		 4168}
4169
4170STDCHAR *
f62ce20a 4171PerlIOMmap_get_base(pTHX_ PerlIO *f)
06da4f11 4172{
14a5cf38
JH		 4173 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4174 PerlIOBuf *b = &m->base;
4175 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4176 /*
71200d45 4177 * Already have a readbuffer in progress
14a5cf38
JH		 4178 */
4179 return b->buf;
4180 }
4181 if (b->buf) {
4182 /*
71200d45 4183 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38 4184 */
22569500
NIS		 4185 m->bbuf = b->buf; /* save it in case we need it again */
4186 b->buf = NULL; /* Clear to trigger below */
14a5cf38
JH		 4187 }
4188 if (!b->buf) {
22569500 4189 PerlIOMmap_map(aTHX_ f); /* Try and map it */
14a5cf38
JH		 4190 if (!b->buf) {
4191 /*
71200d45 4192 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 4193 */
4194 b->buf = m->bbuf;
4195 }
4196 }
4197 b->ptr = b->end = b->buf;
4198 if (b->buf)
4199 return b->buf;
f62ce20a 4200 return PerlIOBuf_get_base(aTHX_ f);
06da4f11
NIS		 4201}
4202
4203SSize_t
f62ce20a 4204PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
06da4f11 4205{
14a5cf38
JH		 4206 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4207 PerlIOBuf *b = &m->base;
4208 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4209 PerlIO_flush(f);
4210 if (b->ptr && (b->ptr - count) >= b->buf
4211 && memEQ(b->ptr - count, vbuf, count)) {
4212 b->ptr -= count;
4213 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4214 return count;
4215 }
4216 if (m->len) {
4217 /*
71200d45 4218 * Loose the unwritable mapped buffer
14a5cf38
JH		 4219 */
4220 PerlIO_flush(f);
4221 /*
71200d45 4222 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 4223 */
4224 if (!b->buf && m->bbuf)
4225 b->buf = m->bbuf;
4226 if (!b->buf) {
f62ce20a 4227 PerlIOBuf_get_base(aTHX_ f);
14a5cf38
JH		 4228 m->bbuf = b->buf;
4229 }
4230 }
f62ce20a 4231 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
06da4f11
NIS		 4232}
4233
4234SSize_t
f62ce20a 4235PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
06da4f11 4236{
14a5cf38
JH		 4237 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4238 PerlIOBuf *b = &m->base;
4239 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4240 /*
71200d45 4241 * No, or wrong sort of, buffer
14a5cf38
JH		 4242 */
4243 if (m->len) {
e87a358a 4244 if (PerlIOMmap_unmap(aTHX_ f) != 0)
14a5cf38
JH		 4245 return 0;
4246 }
4247 /*
71200d45 4248 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 4249 */
4250 if (!b->buf && m->bbuf)
4251 b->buf = m->bbuf;
4252 if (!b->buf) {
f62ce20a 4253 PerlIOBuf_get_base(aTHX_ f);
14a5cf38
JH		 4254 m->bbuf = b->buf;
4255 }
06da4f11 4256 }
f62ce20a 4257 return PerlIOBuf_write(aTHX_ f, vbuf, count);
06da4f11
NIS		 4258}
4259
4260IV
f62ce20a 4261PerlIOMmap_flush(pTHX_ PerlIO *f)
06da4f11 4262{
14a5cf38
JH		 4263 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4264 PerlIOBuf *b = &m->base;
f62ce20a 4265 IV code = PerlIOBuf_flush(aTHX_ f);
14a5cf38 4266 /*
71200d45 4267 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 4268 */
4269 if (b->buf) {
4270 if (m->len) {
4271 /*
71200d45 4272 * Unmap the buffer
14a5cf38 4273 */
e87a358a 4274 if (PerlIOMmap_unmap(aTHX_ f) != 0)
14a5cf38
JH		 4275 code = -1;
4276 }
4277 else {
4278 /*
4279 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 4280 * remember it in case we need one later
14a5cf38
JH		 4281 */
4282 m->bbuf = b->buf;
4283 }
4284 }
4285 return code;
06da4f11
NIS		 4286}
4287
4288IV
f62ce20a 4289PerlIOMmap_fill(pTHX_ PerlIO *f)
06da4f11 4290{
14a5cf38
JH		 4291 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4292 IV code = PerlIO_flush(f);
4293 if (code == 0 && !b->buf) {
f62ce20a 4294 code = PerlIOMmap_map(aTHX_ f);
14a5cf38
JH		 4295 }
4296 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
f62ce20a 4297 code = PerlIOBuf_fill(aTHX_ f);
14a5cf38
JH		 4298 }
4299 return code;
06da4f11
NIS		 4300}
4301
4302IV
f62ce20a 4303PerlIOMmap_close(pTHX_ PerlIO *f)
06da4f11 4304{
14a5cf38
JH		 4305 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4306 PerlIOBuf *b = &m->base;
4307 IV code = PerlIO_flush(f);
4308 if (m->bbuf) {
4309 b->buf = m->bbuf;
4310 m->bbuf = NULL;
4311 b->ptr = b->end = b->buf;
4312 }
f62ce20a 4313 if (PerlIOBuf_close(aTHX_ f) != 0)
14a5cf38
JH		 4314 code = -1;
4315 return code;
06da4f11
NIS		 4316}
4317
71200d45 4318PerlIO *
ecdeb87c 4319PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 4320{
ecdeb87c 4321 return PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 4322}
4323
06da4f11
NIS		 4324
4325PerlIO_funcs PerlIO_mmap = {
2dc2558e 4326 sizeof(PerlIO_funcs),
14a5cf38
JH		 4327 "mmap",
4328 sizeof(PerlIOMmap),
86e05cf2 4329 PERLIO_K_BUFFERED|PERLIO_K_RAW,
14a5cf38 4330 PerlIOBuf_pushed,
44798d05 4331 PerlIOBuf_popped,
14a5cf38 4332 PerlIOBuf_open,
86e05cf2 4333 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 4334 NULL,
4335 PerlIOBase_fileno,
71200d45 4336 PerlIOMmap_dup,
14a5cf38
JH		 4337 PerlIOBuf_read,
4338 PerlIOMmap_unread,
4339 PerlIOMmap_write,
4340 PerlIOBuf_seek,
4341 PerlIOBuf_tell,
4342 PerlIOBuf_close,
4343 PerlIOMmap_flush,
4344 PerlIOMmap_fill,
4345 PerlIOBase_eof,
4346 PerlIOBase_error,
4347 PerlIOBase_clearerr,
4348 PerlIOBase_setlinebuf,
4349 PerlIOMmap_get_base,
4350 PerlIOBuf_bufsiz,
4351 PerlIOBuf_get_ptr,
4352 PerlIOBuf_get_cnt,
4353 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 4354};
4355
22569500 4356#endif /* HAS_MMAP */
06da4f11 4357
9e353e3b 4358PerlIO *
e87a358a 4359Perl_PerlIO_stdin(pTHX)
9e353e3b 4360{
a1ea730d 4361 if (!PL_perlio) {
14a5cf38
JH		 4362 PerlIO_stdstreams(aTHX);
4363 }
a1ea730d 4364 return &PL_perlio[1];
9e353e3b
NIS		 4365}
4366
9e353e3b 4367PerlIO *
e87a358a 4368Perl_PerlIO_stdout(pTHX)
9e353e3b 4369{
a1ea730d 4370 if (!PL_perlio) {
14a5cf38
JH		 4371 PerlIO_stdstreams(aTHX);
4372 }
a1ea730d 4373 return &PL_perlio[2];
9e353e3b
NIS		 4374}
4375
9e353e3b 4376PerlIO *
e87a358a 4377Perl_PerlIO_stderr(pTHX)
9e353e3b 4378{
a1ea730d 4379 if (!PL_perlio) {
14a5cf38
JH		 4380 PerlIO_stdstreams(aTHX);
4381 }
a1ea730d 4382 return &PL_perlio[3];
9e353e3b
NIS		 4383}
4384
4385/*--------------------------------------------------------------------------------------*/
4386
9e353e3b
NIS		 4387char *
4388PerlIO_getname(PerlIO *f, char *buf)
4389{
14a5cf38
JH		 4390 dTHX;
4391 char *name = NULL;
a15cef0c 4392#ifdef VMS
14a5cf38
JH		 4393 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4394 if (stdio)
4395 name = fgetname(stdio, buf);
a15cef0c 4396#else
14a5cf38 4397 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 4398#endif
14a5cf38 4399 return name;
9e353e3b
NIS		 4400}
4401
4402
4403/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 4404/*
4405 * Functions which can be called on any kind of PerlIO implemented in
71200d45 4406 * terms of above
14a5cf38 4407 */
9e353e3b 4408
e87a358a
NIS		 4409#undef PerlIO_fdopen
4410PerlIO *
4411PerlIO_fdopen(int fd, const char *mode)
4412{
4413 dTHX;
4414 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4415}
4416
4417#undef PerlIO_open
4418PerlIO *
4419PerlIO_open(const char *path, const char *mode)
4420{
4421 dTHX;
4422 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4423 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4424}
4425
4426#undef Perlio_reopen
4427PerlIO *
4428PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4429{
4430 dTHX;
4431 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4432 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4433}
4434
9e353e3b 4435#undef PerlIO_getc
6f9d8c32 4436int
9e353e3b 4437PerlIO_getc(PerlIO *f)
760ac839 4438{
e87a358a 4439 dTHX;
14a5cf38
JH		 4440 STDCHAR buf[1];
4441 SSize_t count = PerlIO_read(f, buf, 1);
4442 if (count == 1) {
4443 return (unsigned char) buf[0];
4444 }
4445 return EOF;
313ca112
NIS		 4446}
4447
4448#undef PerlIO_ungetc
4449int
4450PerlIO_ungetc(PerlIO *f, int ch)
4451{
e87a358a 4452 dTHX;
14a5cf38
JH		 4453 if (ch != EOF) {
4454 STDCHAR buf = ch;
4455 if (PerlIO_unread(f, &buf, 1) == 1)
4456 return ch;
4457 }
4458 return EOF;
760ac839
LW		 4459}
4460
9e353e3b
NIS		 4461#undef PerlIO_putc
4462int
4463PerlIO_putc(PerlIO *f, int ch)
760ac839 4464{
e87a358a 4465 dTHX;
14a5cf38
JH		 4466 STDCHAR buf = ch;
4467 return PerlIO_write(f, &buf, 1);
760ac839
LW		 4468}
4469
9e353e3b 4470#undef PerlIO_puts
760ac839 4471int
9e353e3b 4472PerlIO_puts(PerlIO *f, const char *s)
760ac839 4473{
e87a358a 4474 dTHX;
14a5cf38
JH		 4475 STRLEN len = strlen(s);
4476 return PerlIO_write(f, s, len);
760ac839
LW		 4477}
4478
4479#undef PerlIO_rewind
4480void
c78749f2 4481PerlIO_rewind(PerlIO *f)
760ac839 4482{
e87a358a 4483 dTHX;
14a5cf38
JH		 4484 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4485 PerlIO_clearerr(f);
6f9d8c32
NIS		 4486}
4487
4488#undef PerlIO_vprintf
4489int
4490PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4491{
14a5cf38
JH		 4492 dTHX;
4493 SV *sv = newSVpvn("", 0);
4494 char *s;
4495 STRLEN len;
4496 SSize_t wrote;
2cc61e15 4497#ifdef NEED_VA_COPY
14a5cf38
JH		 4498 va_list apc;
4499 Perl_va_copy(ap, apc);
4500 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 4501#else
14a5cf38 4502 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 4503#endif
14a5cf38
JH		 4504 s = SvPV(sv, len);
4505 wrote = PerlIO_write(f, s, len);
4506 SvREFCNT_dec(sv);
4507 return wrote;
760ac839
LW		 4508}
4509
4510#undef PerlIO_printf
6f9d8c32 4511int
14a5cf38 4512PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 4513{
14a5cf38
JH		 4514 va_list ap;
4515 int result;
4516 va_start(ap, fmt);
4517 result = PerlIO_vprintf(f, fmt, ap);
4518 va_end(ap);
4519 return result;
760ac839
LW		 4520}
4521
4522#undef PerlIO_stdoutf
6f9d8c32 4523int
14a5cf38 4524PerlIO_stdoutf(const char *fmt, ...)
760ac839 4525{
e87a358a 4526 dTHX;
14a5cf38
JH		 4527 va_list ap;
4528 int result;
4529 va_start(ap, fmt);
4530 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4531 va_end(ap);
4532 return result;
760ac839
LW		 4533}
4534
4535#undef PerlIO_tmpfile
4536PerlIO *
c78749f2 4537PerlIO_tmpfile(void)
760ac839 4538{
14a5cf38 4539 /*
71200d45 4540 * I have no idea how portable mkstemp() is ...
14a5cf38 4541 */
83b075c3 4542#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 4543 dTHX;
4544 PerlIO *f = NULL;
4545 FILE *stdio = PerlSIO_tmpfile();
4546 if (stdio) {
a33cf58c
NIS		 4547 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4548 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4549 s->stdio = stdio;
4550 }
14a5cf38
JH		 4551 }
4552 return f;
83b075c3 4553#else
14a5cf38
JH		 4554 dTHX;
4555 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4556 int fd = mkstemp(SvPVX(sv));
4557 PerlIO *f = NULL;
4558 if (fd >= 0) {
4559 f = PerlIO_fdopen(fd, "w+");
4560 if (f) {
4561 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4562 }
4563 PerlLIO_unlink(SvPVX(sv));
4564 SvREFCNT_dec(sv);
4565 }
4566 return f;
83b075c3 4567#endif
760ac839
LW		 4568}
4569
6f9d8c32
NIS		 4570#undef HAS_FSETPOS
4571#undef HAS_FGETPOS
4572
22569500
NIS		 4573#endif /* USE_SFIO */
4574#endif /* PERLIO_IS_STDIO */
760ac839 4575
9e353e3b 4576/*======================================================================================*/
14a5cf38 4577/*
71200d45
NIS		 4578 * Now some functions in terms of above which may be needed even if we are
4579 * not in true PerlIO mode
9e353e3b
NIS		 4580 */
4581
760ac839
LW		 4582#ifndef HAS_FSETPOS
4583#undef PerlIO_setpos
4584int
766a733e 4585PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 4586{
14a5cf38
JH		 4587 dTHX;
4588 if (SvOK(pos)) {
4589 STRLEN len;
4590 Off_t *posn = (Off_t *) SvPV(pos, len);
4591 if (f && len == sizeof(Off_t))
4592 return PerlIO_seek(f, *posn, SEEK_SET);
4593 }
93189314 4594 SETERRNO(EINVAL, SS_IVCHAN);
14a5cf38 4595 return -1;
760ac839 4596}
c411622e 4597#else
c411622e 4598#undef PerlIO_setpos
4599int
766a733e 4600PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 4601{
14a5cf38
JH		 4602 dTHX;
4603 if (SvOK(pos)) {
4604 STRLEN len;
4605 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4606 if (f && len == sizeof(Fpos_t)) {
2d4389e4 4607#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4608 return fsetpos64(f, fpos);
d9b3e12d 4609#else
14a5cf38 4610 return fsetpos(f, fpos);
d9b3e12d 4611#endif
14a5cf38 4612 }
766a733e 4613 }
93189314 4614 SETERRNO(EINVAL, SS_IVCHAN);
14a5cf38 4615 return -1;
c411622e 4616}
4617#endif
760ac839
LW		 4618
4619#ifndef HAS_FGETPOS
4620#undef PerlIO_getpos
4621int
766a733e 4622PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 4623{
14a5cf38
JH		 4624 dTHX;
4625 Off_t posn = PerlIO_tell(f);
4626 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4627 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 4628}
c411622e 4629#else
c411622e 4630#undef PerlIO_getpos
4631int
766a733e 4632PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 4633{
14a5cf38
JH		 4634 dTHX;
4635 Fpos_t fpos;
4636 int code;
2d4389e4 4637#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4638 code = fgetpos64(f, &fpos);
d9b3e12d 4639#else
14a5cf38 4640 code = fgetpos(f, &fpos);
d9b3e12d 4641#endif
14a5cf38
JH		 4642 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4643 return code;
c411622e 4644}
4645#endif
760ac839
LW		 4646
4647#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4648
4649int
c78749f2 4650vprintf(char *pat, char *args)
662a7e3f
CS		 4651{
4652 _doprnt(pat, args, stdout);
22569500 4653 return 0; /* wrong, but perl doesn't use the return
14a5cf38 4654 * value */
662a7e3f
CS		 4655}
4656
4657int
c78749f2 4658vfprintf(FILE *fd, char *pat, char *args)
760ac839
LW		 4659{
4660 _doprnt(pat, args, fd);
22569500 4661 return 0; /* wrong, but perl doesn't use the return
14a5cf38 4662 * value */
760ac839
LW		 4663}
4664
4665#endif
4666
4667#ifndef PerlIO_vsprintf
6f9d8c32 4668int
8ac85365 4669PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
760ac839 4670{
14a5cf38
JH		 4671 int val = vsprintf(s, fmt, ap);
4672 if (n >= 0) {
4673 if (strlen(s) >= (STRLEN) n) {
4674 dTHX;
4675 (void) PerlIO_puts(Perl_error_log,
4676 "panic: sprintf overflow - memory corrupted!\n");
4677 my_exit(1);
4678 }
760ac839 4679 }
14a5cf38 4680 return val;
760ac839
LW		 4681}
4682#endif
4683
4684#ifndef PerlIO_sprintf
6f9d8c32 4685int
14a5cf38 4686PerlIO_sprintf(char *s, int n, const char *fmt, ...)
760ac839 4687{
14a5cf38
JH		 4688 va_list ap;
4689 int result;
4690 va_start(ap, fmt);
4691 result = PerlIO_vsprintf(s, n, fmt, ap);
4692 va_end(ap);
4693 return result;
760ac839
LW		 4694}
4695#endif
7fcdafbd 4696
93a8090d
NIS		 4697
4698
4699
4700
439ba545 4701
1fd8f4ce 4702
602c3c4b 4703
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