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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 {
217 SETERRNO(EBADF, SS$_IVCHAN);
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
92bff44d 340PerlIO *
4b069b44 341PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 342{
14a5cf38 343 int fd = fileno(stdio);
4b069b44
NIS		 344 if (!mode || !*mode) {
345 mmode = "r+";
346 }
347 return PerlIO_fdopen(fd, mode);
92bff44d
NIS		 348}
349
350FILE *
351PerlIO_findFILE(PerlIO *pio)
352{
14a5cf38
JH		 353 int fd = PerlIO_fileno(pio);
354 FILE *f = fdopen(fd, "r+");
355 PerlIO_flush(pio);
356 if (!f && errno == EINVAL)
357 f = fdopen(fd, "w");
358 if (!f && errno == EINVAL)
359 f = fdopen(fd, "r");
360 return f;
92bff44d
NIS		 361}
362
363
22569500 364#else /* USE_SFIO */
6f9d8c32 365/*======================================================================================*/
14a5cf38 366/*
71200d45 367 * Implement all the PerlIO interface ourselves.
9e353e3b 368 */
760ac839 369
76ced9ad
NIS		 370#include "perliol.h"
371
14a5cf38
JH		 372/*
373 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 374 * files
14a5cf38 375 */
02f66e2f
NIS		 376#ifdef I_UNISTD
377#include <unistd.h>
378#endif
06da4f11
NIS		 379#ifdef HAS_MMAP
380#include <sys/mman.h>
381#endif
382
02f66e2f 383
14a5cf38
JH		 384void PerlIO_debug(const char *fmt, ...)
385 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 386
6f9d8c32 387void
14a5cf38
JH		 388PerlIO_debug(const char *fmt, ...)
389{
390 static int dbg = 0;
391 va_list ap;
392 dSYS;
393 va_start(ap, fmt);
394 if (!dbg) {
395 char *s = PerlEnv_getenv("PERLIO_DEBUG");
396 if (s && *s)
397 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
398 else
399 dbg = -1;
400 }
401 if (dbg > 0) {
402 dTHX;
70ace5da
NIS		 403#ifdef USE_ITHREADS
404 /* Use fixed buffer as sv_catpvf etc. needs SVs */
405 char buffer[1024];
406 char *s;
407 STRLEN len;
408 s = CopFILE(PL_curcop);
409 if (!s)
410 s = "(none)";
411 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
22569500 412 len = strlen(buffer);
70ace5da
NIS		 413 vsprintf(buffer+len, fmt, ap);
414 PerlLIO_write(dbg, buffer, strlen(buffer));
415#else
14a5cf38
JH		 416 SV *sv = newSVpvn("", 0);
417 char *s;
418 STRLEN len;
419 s = CopFILE(PL_curcop);
420 if (!s)
421 s = "(none)";
422 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
423 (IV) CopLINE(PL_curcop));
424 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
425
426 s = SvPV(sv, len);
427 PerlLIO_write(dbg, s, len);
428 SvREFCNT_dec(sv);
70ace5da 429#endif
14a5cf38
JH		 430 }
431 va_end(ap);
6f9d8c32
NIS		 432}
433
9e353e3b
NIS		 434/*--------------------------------------------------------------------------------------*/
435
14a5cf38 436/*
71200d45 437 * Inner level routines
14a5cf38 438 */
9e353e3b 439
14a5cf38 440/*
71200d45 441 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 442 */
05d1247b 443#define PERLIO_TABLE_SIZE 64
6f9d8c32 444
760ac839 445PerlIO *
5f1a76d0 446PerlIO_allocate(pTHX)
6f9d8c32 447{
14a5cf38 448 /*
71200d45 449 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 450 */
451 PerlIO **last;
452 PerlIO *f;
a1ea730d 453 last = &PL_perlio;
14a5cf38
JH		 454 while ((f = *last)) {
455 int i;
456 last = (PerlIO **) (f);
457 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
458 if (!*++f) {
459 return f;
460 }
461 }
462 }
3a1ee7e8 463 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH		 464 if (!f) {
465 return NULL;
466 }
467 *last = f;
468 return f + 1;
05d1247b
NIS		 469}
470
a1ea730d
NIS		 471#undef PerlIO_fdupopen
472PerlIO *
ecdeb87c 473PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 474{
04892f78 475 if (PerlIOValid(f)) {
a1ea730d
NIS		 476 PerlIO_funcs *tab = PerlIOBase(f)->tab;
477 PerlIO *new;
fe5a182c 478 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
22569500 479 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
a1ea730d
NIS		 480 return new;
481 }
482 else {
483 SETERRNO(EBADF, SS$_IVCHAN);
484 return NULL;
485 }
486}
487
488void
5f1a76d0 489PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 490{
14a5cf38
JH		 491 PerlIO *table = *tablep;
492 if (table) {
493 int i;
494 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
495 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
496 PerlIO *f = table + i;
497 if (*f) {
498 PerlIO_close(f);
499 }
500 }
3a1ee7e8 501 Safefree(table);
14a5cf38 502 *tablep = NULL;
05d1247b 503 }
05d1247b
NIS		 504}
505
fcf2db38
NIS		 506
507PerlIO_list_t *
3a1ee7e8 508PerlIO_list_alloc(pTHX)
fcf2db38 509{
14a5cf38
JH		 510 PerlIO_list_t *list;
511 Newz('L', list, 1, PerlIO_list_t);
512 list->refcnt = 1;
513 return list;
fcf2db38
NIS		 514}
515
516void
3a1ee7e8 517PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 518{
14a5cf38
JH		 519 if (list) {
520 if (--list->refcnt == 0) {
521 if (list->array) {
14a5cf38
JH		 522 IV i;
523 for (i = 0; i < list->cur; i++) {
524 if (list->array[i].arg)
525 SvREFCNT_dec(list->array[i].arg);
526 }
527 Safefree(list->array);
528 }
529 Safefree(list);
530 }
531 }
fcf2db38
NIS		 532}
533
534void
3a1ee7e8 535PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 536{
14a5cf38
JH		 537 PerlIO_pair_t *p;
538 if (list->cur >= list->len) {
539 list->len += 8;
540 if (list->array)
541 Renew(list->array, list->len, PerlIO_pair_t);
542 else
543 New('l', list->array, list->len, PerlIO_pair_t);
544 }
545 p = &(list->array[list->cur++]);
546 p->funcs = funcs;
547 if ((p->arg = arg)) {
548 SvREFCNT_inc(arg);
549 }
fcf2db38
NIS		 550}
551
3a1ee7e8
NIS		 552PerlIO_list_t *
553PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
554{
694c95cf
JH		 555 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
556 if (proto) {
557 int i;
558 list = PerlIO_list_alloc(aTHX);
559 for (i=0; i < proto->cur; i++) {
560 SV *arg = Nullsv;
561 if (proto->array[i].arg)
562 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
563 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
564 }
3a1ee7e8
NIS		 565 }
566 return list;
567}
4a4a6116 568
05d1247b 569void
3a1ee7e8 570PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 571{
3aaf42a7 572#ifdef USE_ITHREADS
3a1ee7e8
NIS		 573 PerlIO **table = &proto->Iperlio;
574 PerlIO *f;
575 PL_perlio = NULL;
576 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
577 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
578 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 579 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS		 580 while ((f = *table)) {
581 int i;
582 table = (PerlIO **) (f++);
583 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
584 if (*f) {
93a8090d 585 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS		 586 }
587 f++;
588 }
589 }
3aaf42a7 590#endif
9a6404c5
DM		 591}
592
593void
13621cfb
NIS		 594PerlIO_destruct(pTHX)
595{
a1ea730d 596 PerlIO **table = &PL_perlio;
14a5cf38 597 PerlIO *f;
694c95cf
JH		 598#ifdef USE_ITHREADS
599 PerlIO_debug("Destruct %p\n",aTHX);
600#endif
14a5cf38
JH		 601 while ((f = *table)) {
602 int i;
603 table = (PerlIO **) (f++);
604 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
605 PerlIO *x = f;
606 PerlIOl *l;
607 while ((l = *x)) {
608 if (l->tab->kind & PERLIO_K_DESTRUCT) {
609 PerlIO_debug("Destruct popping %s\n", l->tab->name);
610 PerlIO_flush(x);
611 PerlIO_pop(aTHX_ x);
612 }
613 else {
614 x = PerlIONext(x);
615 }
616 }
617 f++;
618 }
619 }
13621cfb
NIS		 620}
621
622void
a999f61b 623PerlIO_pop(pTHX_ PerlIO *f)
760ac839 624{
14a5cf38
JH		 625 PerlIOl *l = *f;
626 if (l) {
fe5a182c 627 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH		 628 if (l->tab->Popped) {
629 /*
630 * If popped returns non-zero do not free its layer structure
631 * it has either done so itself, or it is shared and still in
71200d45 632 * use
14a5cf38 633 */
f62ce20a 634 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH		 635 return;
636 }
b47cad08 637 *f = l->next;
3a1ee7e8 638 Safefree(l);
a8c08ecd 639 }
6f9d8c32
NIS		 640}
641
9e353e3b 642/*--------------------------------------------------------------------------------------*/
14a5cf38 643/*
71200d45 644 * XS Interface for perl code
14a5cf38 645 */
9e353e3b 646
fcf2db38 647PerlIO_funcs *
2edd7e44 648PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 649{
14a5cf38
JH		 650 IV i;
651 if ((SSize_t) len <= 0)
652 len = strlen(name);
3a1ee7e8
NIS		 653 for (i = 0; i < PL_known_layers->cur; i++) {
654 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38 655 if (memEQ(f->name, name, len)) {
fe5a182c 656 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH		 657 return f;
658 }
659 }
3a1ee7e8
NIS		 660 if (load && PL_subname && PL_def_layerlist
661 && PL_def_layerlist->cur >= 2) {
14a5cf38
JH		 662 SV *pkgsv = newSVpvn("PerlIO", 6);
663 SV *layer = newSVpvn(name, len);
664 ENTER;
665 /*
71200d45 666 * The two SVs are magically freed by load_module
14a5cf38
JH		 667 */
668 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
669 LEAVE;
670 return PerlIO_find_layer(aTHX_ name, len, 0);
671 }
672 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
673 return NULL;
f3862f8b
NIS		 674}
675
2a1bc955 676#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 677
678static int
679perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
680{
14a5cf38
JH		 681 if (SvROK(sv)) {
682 IO *io = GvIOn((GV *) SvRV(sv));
683 PerlIO *ifp = IoIFP(io);
684 PerlIO *ofp = IoOFP(io);
685 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
686 }
687 return 0;
b13b2135
NIS		 688}
689
690static int
691perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
692{
14a5cf38
JH		 693 if (SvROK(sv)) {
694 IO *io = GvIOn((GV *) SvRV(sv));
695 PerlIO *ifp = IoIFP(io);
696 PerlIO *ofp = IoOFP(io);
697 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
698 }
699 return 0;
b13b2135
NIS		 700}
701
702static int
703perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
704{
14a5cf38
JH		 705 Perl_warn(aTHX_ "clear %" SVf, sv);
706 return 0;
b13b2135
NIS		 707}
708
709static int
710perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
711{
14a5cf38
JH		 712 Perl_warn(aTHX_ "free %" SVf, sv);
713 return 0;
b13b2135
NIS		 714}
715
716MGVTBL perlio_vtab = {
14a5cf38
JH		 717 perlio_mg_get,
718 perlio_mg_set,
22569500 719 NULL, /* len */
14a5cf38
JH		 720 perlio_mg_clear,
721 perlio_mg_free
b13b2135
NIS		 722};
723
724XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
725{
14a5cf38
JH		 726 dXSARGS;
727 SV *sv = SvRV(ST(1));
728 AV *av = newAV();
729 MAGIC *mg;
730 int count = 0;
731 int i;
732 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
733 SvRMAGICAL_off(sv);
734 mg = mg_find(sv, PERL_MAGIC_ext);
735 mg->mg_virtual = &perlio_vtab;
736 mg_magical(sv);
737 Perl_warn(aTHX_ "attrib %" SVf, sv);
738 for (i = 2; i < items; i++) {
739 STRLEN len;
740 const char *name = SvPV(ST(i), len);
741 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
742 if (layer) {
743 av_push(av, SvREFCNT_inc(layer));
744 }
745 else {
746 ST(count) = ST(i);
747 count++;
748 }
749 }
750 SvREFCNT_dec(av);
751 XSRETURN(count);
752}
753
22569500 754#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 755
e3f3bf95
NIS		 756SV *
757PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 758{
14a5cf38
JH		 759 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
760 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
761 return sv;
e3f3bf95
NIS		 762}
763
0c4f7ff0
NIS		 764XS(XS_PerlIO__Layer__find)
765{
14a5cf38
JH		 766 dXSARGS;
767 if (items < 2)
768 Perl_croak(aTHX_ "Usage class->find(name[,load])");
769 else {
770 STRLEN len = 0;
771 char *name = SvPV(ST(1), len);
772 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
773 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
774 ST(0) =
775 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
776 &PL_sv_undef;
777 XSRETURN(1);
778 }
0c4f7ff0
NIS		 779}
780
e3f3bf95
NIS		 781void
782PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
783{
3a1ee7e8
NIS		 784 if (!PL_known_layers)
785 PL_known_layers = PerlIO_list_alloc(aTHX);
786 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 787 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS		 788}
789
1141d9f8 790int
fcf2db38 791PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 792{
14a5cf38
JH		 793 if (names) {
794 const char *s = names;
795 while (*s) {
796 while (isSPACE(*s) || *s == ':')
797 s++;
798 if (*s) {
799 STRLEN llen = 0;
800 const char *e = s;
801 const char *as = Nullch;
802 STRLEN alen = 0;
803 if (!isIDFIRST(*s)) {
804 /*
805 * Message is consistent with how attribute lists are
806 * passed. Even though this means "foo : : bar" is
71200d45 807 * seen as an invalid separator character.
14a5cf38
JH		 808 */
809 char q = ((*s == '\'') ? '"' : '\'');
99ef548b 810 if (ckWARN(WARN_LAYER))
22569500 811 Perl_warner(aTHX_ packWARN(WARN_LAYER),
1e616cf5
JH		 812 "perlio: invalid separator character %c%c%c in layer specification list %s",
813 q, *s, q, s);
0cff2cf3 814 SETERRNO(EINVAL, LIB$_INVARG);
14a5cf38
JH		 815 return -1;
816 }
817 do {
818 e++;
819 } while (isALNUM(*e));
820 llen = e - s;
821 if (*e == '(') {
822 int nesting = 1;
823 as = ++e;
824 while (nesting) {
825 switch (*e++) {
826 case ')':
827 if (--nesting == 0)
828 alen = (e - 1) - as;
829 break;
830 case '(':
831 ++nesting;
832 break;
833 case '\\':
834 /*
835 * It's a nul terminated string, not allowed
836 * to \ the terminating null. Anything other
71200d45 837 * character is passed over.
14a5cf38
JH		 838 */
839 if (*e++) {
840 break;
841 }
842 /*
71200d45 843 * Drop through
14a5cf38
JH		 844 */
845 case '\0':
846 e--;
22569500
NIS		 847 if (ckWARN(WARN_LAYER))
848 Perl_warner(aTHX_ packWARN(WARN_LAYER),
14a5cf38
JH		 849 "perlio: argument list not closed for layer \"%.*s\"",
850 (int) (e - s), s);
851 return -1;
852 default:
853 /*
71200d45 854 * boring.
14a5cf38
JH		 855 */
856 break;
857 }
858 }
859 }
860 if (e > s) {
99ef548b 861 bool warn_layer = ckWARN(WARN_LAYER);
14a5cf38
JH		 862 PerlIO_funcs *layer =
863 PerlIO_find_layer(aTHX_ s, llen, 1);
864 if (layer) {
3a1ee7e8 865 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 866 (as) ? newSVpvn(as,
867 alen) :
868 &PL_sv_undef);
869 }
870 else {
22569500 871 if (warn_layer)
99ef548b 872 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
14a5cf38
JH		 873 (int) llen, s);
874 return -1;
875 }
876 }
877 s = e;
878 }
879 }
880 }
881 return 0;
1141d9f8
NIS		 882}
883
dfebf958 884void
fcf2db38 885PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 886{
14a5cf38 887 PerlIO_funcs *tab = &PerlIO_perlio;
35990314 888#ifdef PERLIO_USING_CRLF
6ce75a77 889 tab = &PerlIO_crlf;
846be114 890#else
6ce75a77 891 if (PerlIO_stdio.Set_ptrcnt)
22569500 892 tab = &PerlIO_stdio;
846be114 893#endif
14a5cf38 894 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 895 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 896 &PL_sv_undef);
dfebf958
NIS		 897}
898
e3f3bf95 899SV *
14a5cf38 900PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 901{
14a5cf38 902 return av->array[n].arg;
e3f3bf95
NIS		 903}
904
f3862f8b 905PerlIO_funcs *
14a5cf38 906PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 907{
14a5cf38
JH		 908 if (n >= 0 && n < av->cur) {
909 PerlIO_debug("Layer %" IVdf " is %s\n", n,
910 av->array[n].funcs->name);
911 return av->array[n].funcs;
912 }
913 if (!def)
914 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
915 return def;
e3f3bf95
NIS		 916}
917
fcf2db38 918PerlIO_list_t *
e3f3bf95
NIS		 919PerlIO_default_layers(pTHX)
920{
3a1ee7e8 921 if (!PL_def_layerlist) {
14a5cf38
JH		 922 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
923 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 924 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 925 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 926#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 927 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 928#if 0
14a5cf38 929 osLayer = &PerlIO_win32;
0c4128ad 930#endif
2f8118af 931#endif
14a5cf38
JH		 932 PerlIO_define_layer(aTHX_ & PerlIO_raw);
933 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
934 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
935 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 936#ifdef HAS_MMAP
14a5cf38 937 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 938#endif
14a5cf38
JH		 939 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
940 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 941 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 942 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
943 &PL_sv_undef);
944 if (s) {
3a1ee7e8 945 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 946 }
947 else {
3a1ee7e8 948 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 949 }
1141d9f8 950 }
3a1ee7e8
NIS		 951 if (PL_def_layerlist->cur < 2) {
952 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 953 }
3a1ee7e8 954 return PL_def_layerlist;
e3f3bf95
NIS		 955}
956
0c4f7ff0
NIS		 957void
958Perl_boot_core_PerlIO(pTHX)
959{
960#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 961 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
962 __FILE__);
0c4f7ff0 963#endif
14a5cf38 964 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 965}
e3f3bf95
NIS		 966
967PerlIO_funcs *
968PerlIO_default_layer(pTHX_ I32 n)
969{
14a5cf38
JH		 970 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
971 if (n < 0)
972 n += av->cur;
973 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 974}
975
a999f61b
NIS		 976#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
977#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 978
979void
1141d9f8 980PerlIO_stdstreams(pTHX)
60382766 981{
a1ea730d 982 if (!PL_perlio) {
14a5cf38
JH		 983 PerlIO_allocate(aTHX);
984 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
985 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
986 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
987 }
60382766
NIS		 988}
989
990PerlIO *
14a5cf38
JH		 991PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
992{
2dc2558e
NIS		 993 if (tab->fsize != sizeof(PerlIO_funcs)) {
994 mismatch:
995 Perl_croak(aTHX_ "Layer does not match this perl");
996 }
997 if (tab->size) {
998 PerlIOl *l = NULL;
999 if (tab->size < sizeof(PerlIOl)) {
1000 goto mismatch;
1001 }
1002 /* Real layer with a data area */
1003 Newc('L',l,tab->size,char,PerlIOl);
1004 if (l && f) {
1005 Zero(l, tab->size, char);
1006 l->next = *f;
1007 l->tab = tab;
1008 *f = l;
1009 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1010 (mode) ? mode : "(Null)", (void*)arg);
1011 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1012 PerlIO_pop(aTHX_ f);
1013 return NULL;
1014 }
1015 }
1016 }
1017 else if (f) {
1018 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS		 1019 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1020 (mode) ? mode : "(Null)", (void*)arg);
2dc2558e 1021 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
14a5cf38
JH		 1022 return NULL;
1023 }
1024 }
1025 return f;
60382766
NIS		 1026}
1027
dfebf958 1028IV
2dc2558e 1029PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 1030{
14a5cf38
JH		 1031 PerlIO_pop(aTHX_ f);
1032 if (*f) {
1033 PerlIO_flush(f);
1034 PerlIO_pop(aTHX_ f);
1035 return 0;
1036 }
1037 return -1;
4b803d04
NIS		 1038}
1039
1040IV
86e05cf2
NIS		 1041PerlIOBase_binmode(pTHX_ PerlIO *f)
1042{
1043 if (PerlIOValid(f)) {
1044 /* Is layer suitable for raw stream ? */
1045 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1046 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1047 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1048 }
1049 else {
1050 /* Not suitable - pop it */
1051 PerlIO_pop(aTHX_ f);
1052 }
1053 return 0;
1054 }
1055 return -1;
1056}
1057
1058IV
2dc2558e 1059PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1060{
86e05cf2 1061
04892f78 1062 if (PerlIOValid(f)) {
86e05cf2
NIS		 1063 PerlIO *t;
1064 PerlIOl *l;
14a5cf38 1065 PerlIO_flush(f);
86e05cf2
NIS		 1066 /*
1067 * Strip all layers that are not suitable for a raw stream
1068 */
1069 t = f;
1070 while (t && (l = *t)) {
1071 if (l->tab->Binmode) {
1072 /* Has a handler - normal case */
1073 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1074 if (*t == l) {
1075 /* Layer still there - move down a layer */
1076 t = PerlIONext(t);
1077 }
1078 }
1079 else {
1080 return -1;
1081 }
14a5cf38
JH		 1082 }
1083 else {
86e05cf2
NIS		 1084 /* No handler - pop it */
1085 PerlIO_pop(aTHX_ t);
14a5cf38
JH		 1086 }
1087 }
86e05cf2
NIS		 1088 if (PerlIOValid(f)) {
1089 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1090 return 0;
1091 }
14a5cf38
JH		 1092 }
1093 return -1;
dfebf958
NIS		 1094}
1095
ac27b0f5 1096int
14a5cf38 1097PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1098 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1099{
14a5cf38
JH		 1100 int code = 0;
1101 while (n < max) {
1102 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1103 if (tab) {
1104 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1105 code = -1;
1106 break;
1107 }
1108 }
1109 n++;
1110 }
1111 return code;
e3f3bf95
NIS		 1112}
1113
1114int
ac27b0f5
NIS		 1115PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1116{
14a5cf38 1117 int code = 0;
53f1b6d2 1118 if (f && names) {
3a1ee7e8 1119 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1120 code = PerlIO_parse_layers(aTHX_ layers, names);
1121 if (code == 0) {
d9dac8cd 1122 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1123 }
3a1ee7e8 1124 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1125 }
14a5cf38 1126 return code;
ac27b0f5
NIS		 1127}
1128
f3862f8b 1129
60382766 1130/*--------------------------------------------------------------------------------------*/
14a5cf38 1131/*
71200d45 1132 * Given the abstraction above the public API functions
14a5cf38 1133 */
60382766
NIS		 1134
1135int
f5b9d040 1136PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1137{
14a5cf38 1138 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1139 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1140 (names) ? names : "(Null)");
03c0554d
NIS		 1141 if (names) {
1142 /* Do not flush etc. if (e.g.) switching encodings.
1143 if a pushed layer knows it needs to flush lower layers
1144 (for example :unix which is never going to call them)
1145 it can do the flush when it is pushed.
1146 */
1147 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1148 }
1149 else {
86e05cf2 1150 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1151#ifdef PERLIO_USING_CRLF
03c0554d
NIS		 1152 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1153 O_BINARY so we can look for it in mode.
1154 */
1155 if (!(mode & O_BINARY)) {
1156 /* Text mode */
86e05cf2
NIS		 1157 /* FIXME?: Looking down the layer stack seems wrong,
1158 but is a way of reaching past (say) an encoding layer
1159 to flip CRLF-ness of the layer(s) below
1160 */
03c0554d
NIS		 1161 while (*f) {
1162 /* Perhaps we should turn on bottom-most aware layer
1163 e.g. Ilya's idea that UNIX TTY could serve
1164 */
1165 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1166 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1167 /* Not in text mode - flush any pending stuff and flip it */
1168 PerlIO_flush(f);
1169 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1170 }
1171 /* Only need to turn it on in one layer so we are done */
1172 return TRUE;
ed53a2bb 1173 }
03c0554d 1174 f = PerlIONext(f);
14a5cf38 1175 }
03c0554d
NIS		 1176 /* Not finding a CRLF aware layer presumably means we are binary
1177 which is not what was requested - so we failed
1178 We _could_ push :crlf layer but so could caller
1179 */
1180 return FALSE;
14a5cf38 1181 }
6ce75a77 1182#endif
86e05cf2
NIS		 1183 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1184 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1185 */
86e05cf2 1186 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
14a5cf38 1187 }
f5b9d040
NIS		 1188}
1189
f5b9d040 1190int
e87a358a 1191PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1192{
04892f78 1193 if (PerlIOValid(f))
f62ce20a 1194 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH		 1195 else {
1196 SETERRNO(EBADF, SS$_IVCHAN);
1197 return -1;
1198 }
76ced9ad
NIS		 1199}
1200
b931b1d9 1201int
e87a358a 1202Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1203{
14a5cf38 1204 int code = -1;
04892f78 1205 if (PerlIOValid(f)) {
f62ce20a 1206 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH		 1207 while (*f) {
1208 PerlIO_pop(aTHX_ f);
1209 }
f6c77cf1 1210 }
14a5cf38 1211 return code;
b931b1d9
NIS		 1212}
1213
b931b1d9 1214int
e87a358a 1215Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1216{
04892f78 1217 if (PerlIOValid(f))
f62ce20a 1218 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
14a5cf38
JH		 1219 else {
1220 SETERRNO(EBADF, SS$_IVCHAN);
1221 return -1;
1222 }
b931b1d9
NIS		 1223}
1224
1141d9f8
NIS		 1225static const char *
1226PerlIO_context_layers(pTHX_ const char *mode)
1227{
14a5cf38
JH		 1228 const char *type = NULL;
1229 /*
71200d45 1230 * Need to supply default layer info from open.pm
14a5cf38
JH		 1231 */
1232 if (PL_curcop) {
1233 SV *layers = PL_curcop->cop_io;
1234 if (layers) {
1235 STRLEN len;
1236 type = SvPV(layers, len);
1237 if (type && mode[0] != 'r') {
1238 /*
71200d45 1239 * Skip to write part
14a5cf38
JH		 1240 */
1241 const char *s = strchr(type, 0);
eb160463 1242 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH		 1243 type = s + 1;
1244 }
1245 }
1246 }
1247 }
1248 return type;
1141d9f8
NIS		 1249}
1250
fcf2db38 1251static PerlIO_funcs *
2edd7e44
NIS		 1252PerlIO_layer_from_ref(pTHX_ SV *sv)
1253{
14a5cf38 1254 /*
71200d45 1255 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1256 */
1257 if (SvTYPE(sv) < SVt_PVAV)
e934609f 1258 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
14a5cf38
JH		 1259
1260 /*
71200d45 1261 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1262 */
1263 switch (SvTYPE(sv)) {
1264 case SVt_PVAV:
1265 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1266 case SVt_PVHV:
1267 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1268 case SVt_PVCV:
1269 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1270 case SVt_PVGV:
1271 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1272 }
1273 return NULL;
2edd7e44
NIS		 1274}
1275
fcf2db38 1276PerlIO_list_t *
14a5cf38
JH		 1277PerlIO_resolve_layers(pTHX_ const char *layers,
1278 const char *mode, int narg, SV **args)
1279{
1280 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1281 int incdef = 1;
a1ea730d 1282 if (!PL_perlio)
14a5cf38
JH		 1283 PerlIO_stdstreams(aTHX);
1284 if (narg) {
1285 SV *arg = *args;
1286 /*
71200d45
NIS		 1287 * If it is a reference but not an object see if we have a handler
1288 * for it
14a5cf38
JH		 1289 */
1290 if (SvROK(arg) && !sv_isobject(arg)) {
1291 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1292 if (handler) {
3a1ee7e8
NIS		 1293 def = PerlIO_list_alloc(aTHX);
1294 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1295 incdef = 0;
1296 }
1297 /*
e934609f 1298 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1299 * something sensible else we will just stringfy and open
71200d45 1300 * resulting string.
14a5cf38
JH		 1301 */
1302 }
1303 }
1304 if (!layers)
1305 layers = PerlIO_context_layers(aTHX_ mode);
1306 if (layers && *layers) {
1307 PerlIO_list_t *av;
1308 if (incdef) {
1309 IV i = def->cur;
3a1ee7e8 1310 av = PerlIO_list_alloc(aTHX);
14a5cf38 1311 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1312 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1313 def->array[i].arg);
1314 }
1315 }
1316 else {
1317 av = def;
1318 }
0cff2cf3
NIS		 1319 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1320 return av;
1321 }
1322 else {
1323 PerlIO_list_free(aTHX_ av);
1324 return (PerlIO_list_t *) NULL;
1325 }
14a5cf38
JH		 1326 }
1327 else {
1328 if (incdef)
1329 def->refcnt++;
1330 return def;
1331 }
ee518936
NIS		 1332}
1333
1334PerlIO *
14a5cf38
JH		 1335PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1336 int imode, int perm, PerlIO *f, int narg, SV **args)
1337{
1338 if (!f && narg == 1 && *args == &PL_sv_undef) {
1339 if ((f = PerlIO_tmpfile())) {
1340 if (!layers)
1341 layers = PerlIO_context_layers(aTHX_ mode);
1342 if (layers && *layers)
1343 PerlIO_apply_layers(aTHX_ f, mode, layers);
1344 }
1345 }
1346 else {
1347 PerlIO_list_t *layera = NULL;
1348 IV n;
1349 PerlIO_funcs *tab = NULL;
04892f78 1350 if (PerlIOValid(f)) {
14a5cf38 1351 /*
71200d45
NIS		 1352 * This is "reopen" - it is not tested as perl does not use it
1353 * yet
14a5cf38
JH		 1354 */
1355 PerlIOl *l = *f;
3a1ee7e8 1356 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1357 while (l) {
04892f78
NIS		 1358 SV *arg = (l->tab->Getarg)
1359 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1360 : &PL_sv_undef;
3a1ee7e8 1361 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1362 l = *PerlIONext(&l);
1363 }
1364 }
1365 else {
1366 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS		 1367 if (!layera) {
1368 return NULL;
1369 }
14a5cf38
JH		 1370 }
1371 /*
71200d45 1372 * Start at "top" of layer stack
14a5cf38
JH		 1373 */
1374 n = layera->cur - 1;
1375 while (n >= 0) {
1376 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1377 if (t && t->Open) {
1378 tab = t;
1379 break;
1380 }
1381 n--;
1382 }
1383 if (tab) {
1384 /*
71200d45 1385 * Found that layer 'n' can do opens - call it
14a5cf38 1386 */
7cf31beb 1387 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1388 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1389 }
14a5cf38 1390 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH		 1391 tab->name, layers, mode, fd, imode, perm,
1392 (void*)f, narg, (void*)args);
14a5cf38
JH		 1393 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1394 f, narg, args);
1395 if (f) {
1396 if (n + 1 < layera->cur) {
1397 /*
1398 * More layers above the one that we used to open -
71200d45 1399 * apply them now
14a5cf38 1400 */
d9dac8cd
NIS		 1401 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1402 /* If pushing layers fails close the file */
1403 PerlIO_close(f);
14a5cf38
JH		 1404 f = NULL;
1405 }
1406 }
1407 }
1408 }
3a1ee7e8 1409 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1410 }
1411 return f;
ee518936 1412}
b931b1d9
NIS		 1413
1414
9e353e3b 1415SSize_t
e87a358a 1416Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1417{
04892f78 1418 if (PerlIOValid(f))
f62ce20a 1419 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1420 else {
1421 SETERRNO(EBADF, SS$_IVCHAN);
1422 return -1;
1423 }
760ac839
LW		 1424}
1425
313ca112 1426SSize_t
e87a358a 1427Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1428{
04892f78 1429 if (PerlIOValid(f))
f62ce20a 1430 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1431 else {
1432 SETERRNO(EBADF, SS$_IVCHAN);
1433 return -1;
1434 }
760ac839
LW		 1435}
1436
9e353e3b 1437SSize_t
e87a358a 1438Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1439{
04892f78 1440 if (PerlIOValid(f))
f62ce20a 1441 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1442 else {
1443 SETERRNO(EBADF, SS$_IVCHAN);
1444 return -1;
1445 }
760ac839
LW		 1446}
1447
6f9d8c32 1448int
e87a358a 1449Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1450{
04892f78 1451 if (PerlIOValid(f))
f62ce20a 1452 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
14a5cf38
JH		 1453 else {
1454 SETERRNO(EBADF, SS$_IVCHAN);
1455 return -1;
1456 }
760ac839
LW		 1457}
1458
9e353e3b 1459Off_t
e87a358a 1460Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1461{
04892f78 1462 if (PerlIOValid(f))
f62ce20a 1463 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
14a5cf38
JH		 1464 else {
1465 SETERRNO(EBADF, SS$_IVCHAN);
1466 return -1;
1467 }
760ac839
LW		 1468}
1469
6f9d8c32 1470int
e87a358a 1471Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1472{
14a5cf38
JH		 1473 if (f) {
1474 if (*f) {
1475 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1476 if (tab && tab->Flush) {
f62ce20a 1477 return (*tab->Flush) (aTHX_ f);
14a5cf38
JH		 1478 }
1479 else {
fe5a182c 1480 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
14a5cf38
JH		 1481 SETERRNO(EBADF, SS$_IVCHAN);
1482 return -1;
1483 }
1484 }
1485 else {
fe5a182c 1486 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
14a5cf38
JH		 1487 SETERRNO(EBADF, SS$_IVCHAN);
1488 return -1;
1489 }
1490 }
1491 else {
1492 /*
1493 * Is it good API design to do flush-all on NULL, a potentially
1494 * errorneous input? Maybe some magical value (PerlIO*
1495 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1496 * things on fflush(NULL), but should we be bound by their design
71200d45 1497 * decisions? --jhi
14a5cf38 1498 */
a1ea730d 1499 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1500 int code = 0;
1501 while ((f = *table)) {
1502 int i;
1503 table = (PerlIO **) (f++);
1504 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1505 if (*f && PerlIO_flush(f) != 0)
1506 code = -1;
1507 f++;
1508 }
1509 }
1510 return code;
1511 }
760ac839
LW		 1512}
1513
a9c883f6 1514void
f62ce20a 1515PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1516{
a1ea730d 1517 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1518 PerlIO *f;
1519 while ((f = *table)) {
1520 int i;
1521 table = (PerlIO **) (f++);
1522 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1523 if (*f
1524 && (PerlIOBase(f)->
1525 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1526 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1527 PerlIO_flush(f);
1528 f++;
1529 }
a9c883f6 1530 }
a9c883f6
NIS		 1531}
1532
06da4f11 1533int
e87a358a 1534Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1535{
04892f78 1536 if (PerlIOValid(f))
f62ce20a 1537 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
14a5cf38
JH		 1538 else {
1539 SETERRNO(EBADF, SS$_IVCHAN);
1540 return -1;
1541 }
06da4f11
NIS		 1542}
1543
f3862f8b
NIS		 1544int
1545PerlIO_isutf8(PerlIO *f)
1546{
04892f78 1547 if (PerlIOValid(f))
14a5cf38
JH		 1548 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1549 else {
1550 SETERRNO(EBADF, SS$_IVCHAN);
1551 return -1;
1552 }
f3862f8b
NIS		 1553}
1554
6f9d8c32 1555int
e87a358a 1556Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1557{
04892f78 1558 if (PerlIOValid(f))
f62ce20a 1559 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
14a5cf38
JH		 1560 else {
1561 SETERRNO(EBADF, SS$_IVCHAN);
1562 return -1;
1563 }
9e353e3b
NIS		 1564}
1565
9e353e3b 1566int
e87a358a 1567Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1568{
04892f78 1569 if (PerlIOValid(f))
f62ce20a 1570 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
14a5cf38
JH		 1571 else {
1572 SETERRNO(EBADF, SS$_IVCHAN);
1573 return -1;
1574 }
9e353e3b
NIS		 1575}
1576
9e353e3b 1577void
e87a358a 1578Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1579{
04892f78 1580 if (PerlIOValid(f))
f62ce20a 1581 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
14a5cf38
JH		 1582 else
1583 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1584}
1585
9e353e3b 1586void
e87a358a 1587Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1588{
04892f78 1589 if (PerlIOValid(f))
f62ce20a 1590 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
14a5cf38
JH		 1591 else
1592 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1593}
1594
9e353e3b
NIS		 1595int
1596PerlIO_has_base(PerlIO *f)
1597{
04892f78 1598 if (PerlIOValid(f)) {
14a5cf38
JH		 1599 return (PerlIOBase(f)->tab->Get_base != NULL);
1600 }
1601 return 0;
760ac839
LW		 1602}
1603
9e353e3b
NIS		 1604int
1605PerlIO_fast_gets(PerlIO *f)
760ac839 1606{
04892f78 1607 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
14a5cf38
JH		 1608 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1609 return (tab->Set_ptrcnt != NULL);
1610 }
1611 return 0;
9e353e3b
NIS		 1612}
1613
9e353e3b
NIS		 1614int
1615PerlIO_has_cntptr(PerlIO *f)
1616{
04892f78 1617 if (PerlIOValid(f)) {
14a5cf38
JH		 1618 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1619 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1620 }
1621 return 0;
9e353e3b
NIS		 1622}
1623
9e353e3b
NIS		 1624int
1625PerlIO_canset_cnt(PerlIO *f)
1626{
04892f78 1627 if (PerlIOValid(f)) {
14a5cf38
JH		 1628 PerlIOl *l = PerlIOBase(f);
1629 return (l->tab->Set_ptrcnt != NULL);
1630 }
1631 return 0;
760ac839
LW		 1632}
1633
888911fc 1634STDCHAR *
e87a358a 1635Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1636{
04892f78 1637 if (PerlIOValid(f))
f62ce20a 1638 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
14a5cf38 1639 return NULL;
9e353e3b
NIS		 1640}
1641
9e353e3b 1642int
e87a358a 1643Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1644{
04892f78 1645 if (PerlIOValid(f))
f62ce20a 1646 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
14a5cf38 1647 return 0;
9e353e3b
NIS		 1648}
1649
9e353e3b 1650STDCHAR *
e87a358a 1651Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1652{
04892f78
NIS		 1653 if (PerlIOValid(f)) {
1654 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1655 if (tab->Get_ptr == NULL)
1656 return NULL;
1657 return (*tab->Get_ptr) (aTHX_ f);
1658 }
1659 return NULL;
9e353e3b
NIS		 1660}
1661
05d1247b 1662int
e87a358a 1663Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1664{
04892f78
NIS		 1665 if (PerlIOValid(f)) {
1666 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1667 if (tab->Get_cnt == NULL)
1668 return 0;
1669 return (*tab->Get_cnt) (aTHX_ f);
1670 }
1671 return 0;
9e353e3b
NIS		 1672}
1673
9e353e3b 1674void
e87a358a 1675Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1676{
04892f78
NIS		 1677 if (PerlIOValid(f)) {
1678 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1679 }
9e353e3b
NIS		 1680}
1681
9e353e3b 1682void
e87a358a 1683Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1684{
04892f78
NIS		 1685 if (PerlIOValid(f)) {
1686 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1687 if (tab->Set_ptrcnt == NULL) {
1688 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1689 }
1690 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
14a5cf38 1691 }
9e353e3b
NIS		 1692}
1693
1694/*--------------------------------------------------------------------------------------*/
14a5cf38 1695/*
71200d45 1696 * utf8 and raw dummy layers
14a5cf38 1697 */
dfebf958 1698
26fb694e 1699IV
2dc2558e 1700PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1701{
00f51856 1702 if (PerlIOValid(f)) {
14a5cf38
JH		 1703 if (tab->kind & PERLIO_K_UTF8)
1704 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1705 else
1706 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1707 return 0;
1708 }
1709 return -1;
26fb694e
NIS		 1710}
1711
dfebf958 1712PerlIO_funcs PerlIO_utf8 = {
2dc2558e 1713 sizeof(PerlIO_funcs),
14a5cf38 1714 "utf8",
2dc2558e 1715 0,
6874a2de 1716 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH		 1717 PerlIOUtf8_pushed,
1718 NULL,
1719 NULL,
1720 NULL,
1721 NULL,
1722 NULL,
1723 NULL,
1724 NULL,
1725 NULL,
1726 NULL,
1727 NULL,
22569500
NIS		 1728 NULL, /* flush */
1729 NULL, /* fill */
14a5cf38
JH		 1730 NULL,
1731 NULL,
1732 NULL,
1733 NULL,
22569500
NIS		 1734 NULL, /* get_base */
1735 NULL, /* get_bufsiz */
1736 NULL, /* get_ptr */
1737 NULL, /* get_cnt */
1738 NULL, /* set_ptrcnt */
26fb694e
NIS		 1739};
1740
1741PerlIO_funcs PerlIO_byte = {
2dc2558e 1742 sizeof(PerlIO_funcs),
14a5cf38 1743 "bytes",
2dc2558e 1744 0,
14a5cf38
JH		 1745 PERLIO_K_DUMMY,
1746 PerlIOUtf8_pushed,
1747 NULL,
1748 NULL,
1749 NULL,
1750 NULL,
1751 NULL,
1752 NULL,
1753 NULL,
1754 NULL,
1755 NULL,
1756 NULL,
22569500
NIS		 1757 NULL, /* flush */
1758 NULL, /* fill */
14a5cf38
JH		 1759 NULL,
1760 NULL,
1761 NULL,
1762 NULL,
22569500
NIS		 1763 NULL, /* get_base */
1764 NULL, /* get_bufsiz */
1765 NULL, /* get_ptr */
1766 NULL, /* get_cnt */
1767 NULL, /* set_ptrcnt */
dfebf958
NIS		 1768};
1769
1770PerlIO *
14a5cf38
JH		 1771PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1772 IV n, const char *mode, int fd, int imode, int perm,
1773 PerlIO *old, int narg, SV **args)
dfebf958 1774{
14a5cf38
JH		 1775 PerlIO_funcs *tab = PerlIO_default_btm();
1776 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1777 old, narg, args);
dfebf958
NIS		 1778}
1779
1780PerlIO_funcs PerlIO_raw = {
2dc2558e 1781 sizeof(PerlIO_funcs),
14a5cf38 1782 "raw",
2dc2558e 1783 0,
14a5cf38
JH		 1784 PERLIO_K_DUMMY,
1785 PerlIORaw_pushed,
1786 PerlIOBase_popped,
1787 PerlIORaw_open,
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/*--------------------------------------------------------------------------------------*/
1809/*--------------------------------------------------------------------------------------*/
14a5cf38 1810/*
71200d45 1811 * "Methods" of the "base class"
14a5cf38 1812 */
9e353e3b
NIS		 1813
1814IV
f62ce20a 1815PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1816{
04892f78 1817 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS		 1818}
1819
f5b9d040 1820char *
14a5cf38
JH		 1821PerlIO_modestr(PerlIO *f, char *buf)
1822{
1823 char *s = buf;
1824 IV flags = PerlIOBase(f)->flags;
1825 if (flags & PERLIO_F_APPEND) {
1826 *s++ = 'a';
1827 if (flags & PERLIO_F_CANREAD) {
1828 *s++ = '+';
1829 }
1830 }
1831 else if (flags & PERLIO_F_CANREAD) {
1832 *s++ = 'r';
1833 if (flags & PERLIO_F_CANWRITE)
1834 *s++ = '+';
1835 }
1836 else if (flags & PERLIO_F_CANWRITE) {
1837 *s++ = 'w';
1838 if (flags & PERLIO_F_CANREAD) {
1839 *s++ = '+';
1840 }
1841 }
35990314 1842#ifdef PERLIO_USING_CRLF
14a5cf38
JH		 1843 if (!(flags & PERLIO_F_CRLF))
1844 *s++ = 'b';
5f1a76d0 1845#endif
14a5cf38
JH		 1846 *s = '\0';
1847 return buf;
f5b9d040
NIS		 1848}
1849
76ced9ad 1850IV
2dc2558e 1851PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1852{
14a5cf38 1853 PerlIOl *l = PerlIOBase(f);
b7953727 1854#if 0
14a5cf38
JH		 1855 const char *omode = mode;
1856 char temp[8];
b7953727 1857#endif
14a5cf38
JH		 1858 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1859 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1860 if (tab->Set_ptrcnt != NULL)
1861 l->flags |= PERLIO_F_FASTGETS;
1862 if (mode) {
1863 if (*mode == '#' || *mode == 'I')
1864 mode++;
1865 switch (*mode++) {
1866 case 'r':
1867 l->flags |= PERLIO_F_CANREAD;
1868 break;
1869 case 'a':
1870 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1871 break;
1872 case 'w':
1873 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1874 break;
1875 default:
1876 SETERRNO(EINVAL, LIB$_INVARG);
1877 return -1;
1878 }
1879 while (*mode) {
1880 switch (*mode++) {
1881 case '+':
1882 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1883 break;
1884 case 'b':
1885 l->flags &= ~PERLIO_F_CRLF;
1886 break;
1887 case 't':
1888 l->flags |= PERLIO_F_CRLF;
1889 break;
1890 default:
1891 SETERRNO(EINVAL, LIB$_INVARG);
1892 return -1;
1893 }
1894 }
1895 }
1896 else {
1897 if (l->next) {
1898 l->flags |= l->next->flags &
1899 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1900 PERLIO_F_APPEND);
1901 }
1902 }
5e2ab84b 1903#if 0
14a5cf38
JH		 1904 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1905 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1906 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1907#endif
14a5cf38 1908 return 0;
76ced9ad
NIS		 1909}
1910
1911IV
f62ce20a 1912PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 1913{
14a5cf38 1914 return 0;
760ac839
LW		 1915}
1916
9e353e3b 1917SSize_t
f62ce20a 1918PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 1919{
14a5cf38 1920 /*
71200d45 1921 * Save the position as current head considers it
14a5cf38
JH		 1922 */
1923 Off_t old = PerlIO_tell(f);
1924 SSize_t done;
1925 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1926 PerlIOSelf(f, PerlIOBuf)->posn = old;
f62ce20a 1927 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38 1928 return done;
9e353e3b
NIS		 1929}
1930
f6c77cf1 1931SSize_t
f62ce20a 1932PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 1933{
14a5cf38
JH		 1934 STDCHAR *buf = (STDCHAR *) vbuf;
1935 if (f) {
1936 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1937 return 0;
1938 while (count > 0) {
1939 SSize_t avail = PerlIO_get_cnt(f);
1940 SSize_t take = 0;
1941 if (avail > 0)
eb160463 1942 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH		 1943 if (take > 0) {
1944 STDCHAR *ptr = PerlIO_get_ptr(f);
1945 Copy(ptr, buf, take, STDCHAR);
1946 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1947 count -= take;
1948 buf += take;
1949 }
1950 if (count > 0 && avail <= 0) {
1951 if (PerlIO_fill(f) != 0)
1952 break;
1953 }
1954 }
1955 return (buf - (STDCHAR *) vbuf);
1956 }
f6c77cf1 1957 return 0;
f6c77cf1
NIS		 1958}
1959
9e353e3b 1960IV
f62ce20a 1961PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 1962{
14a5cf38 1963 return 0;
9e353e3b
NIS		 1964}
1965
1966IV
f62ce20a 1967PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 1968{
14a5cf38 1969 return -1;
06da4f11
NIS		 1970}
1971
1972IV
f62ce20a 1973PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 1974{
14a5cf38
JH		 1975 IV code = 0;
1976 PerlIO *n = PerlIONext(f);
1977 if (PerlIO_flush(f) != 0)
1978 code = -1;
04892f78 1979 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
14a5cf38
JH		 1980 code = -1;
1981 PerlIOBase(f)->flags &=
1982 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1983 return code;
9e353e3b
NIS		 1984}
1985
1986IV
f62ce20a 1987PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 1988{
04892f78 1989 if (PerlIOValid(f)) {
14a5cf38
JH		 1990 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1991 }
1992 return 1;
9e353e3b
NIS		 1993}
1994
1995IV
f62ce20a 1996PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 1997{
04892f78 1998 if (PerlIOValid(f)) {
14a5cf38
JH		 1999 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2000 }
2001 return 1;
9e353e3b
NIS		 2002}
2003
2004void
f62ce20a 2005PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2006{
04892f78 2007 if (PerlIOValid(f)) {
14a5cf38
JH		 2008 PerlIO *n = PerlIONext(f);
2009 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2010 if (PerlIOValid(n))
14a5cf38
JH		 2011 PerlIO_clearerr(n);
2012 }
9e353e3b
NIS		 2013}
2014
2015void
f62ce20a 2016PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2017{
04892f78 2018 if (PerlIOValid(f)) {
14a5cf38
JH		 2019 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2020 }
9e353e3b
NIS		 2021}
2022
93a8090d
NIS		 2023SV *
2024PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2025{
2026 if (!arg)
2027 return Nullsv;
2028#ifdef sv_dup
2029 if (param) {
2030 return sv_dup(arg, param);
2031 }
2032 else {
2033 return newSVsv(arg);
2034 }
2035#else
2036 return newSVsv(arg);
2037#endif
2038}
2039
2040PerlIO *
ecdeb87c 2041PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d
NIS		 2042{
2043 PerlIO *nexto = PerlIONext(o);
04892f78 2044 if (PerlIOValid(nexto)) {
93a8090d 2045 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
ecdeb87c 2046 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
93a8090d
NIS		 2047 }
2048 if (f) {
2049 PerlIO_funcs *self = PerlIOBase(o)->tab;
2050 SV *arg = Nullsv;
2051 char buf[8];
fe5a182c
JH		 2052 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2053 self->name, (void*)f, (void*)o, (void*)param);
93a8090d 2054 if (self->Getarg) {
ecdeb87c 2055 arg = (*self->Getarg)(aTHX_ o,param,flags);
93a8090d
NIS		 2056 }
2057 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2058 if (arg) {
93a8090d
NIS		 2059 SvREFCNT_dec(arg);
2060 }
2061 }
2062 return f;
2063}
2064
2065#define PERLIO_MAX_REFCOUNTABLE_FD 2048
168d5872 2066#ifdef USE_THREADS
93a8090d 2067perl_mutex PerlIO_mutex;
93a8090d 2068#endif
168d5872 2069int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
93a8090d
NIS		 2070
2071void
2072PerlIO_init(pTHX)
2073{
2074 /* Place holder for stdstreams call ??? */
168d5872 2075#ifdef USE_THREADS
93a8090d
NIS		 2076 MUTEX_INIT(&PerlIO_mutex);
2077#endif
2078}
2079
168d5872
NIS		 2080void
2081PerlIOUnix_refcnt_inc(int fd)
2082{
2083 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2084#ifdef USE_THREADS
2085 MUTEX_LOCK(&PerlIO_mutex);
2086#endif
2087 PerlIO_fd_refcnt[fd]++;
2088 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2089#ifdef USE_THREADS
2090 MUTEX_UNLOCK(&PerlIO_mutex);
2091#endif
2092 }
2093}
2094
168d5872
NIS		 2095int
2096PerlIOUnix_refcnt_dec(int fd)
2097{
2098 int cnt = 0;
2099 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2100#ifdef USE_THREADS
2101 MUTEX_LOCK(&PerlIO_mutex);
2102#endif
2103 cnt = --PerlIO_fd_refcnt[fd];
2104 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2105#ifdef USE_THREADS
2106 MUTEX_UNLOCK(&PerlIO_mutex);
2107#endif
2108 }
2109 return cnt;
2110}
2111
694c95cf
JH		 2112void
2113PerlIO_cleanup(pTHX)
2114{
2115 int i;
2116#ifdef USE_ITHREADS
9f4bd222
NIS		 2117 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2118#else
2119 PerlIO_debug("Cleanup layers\n");
694c95cf
JH		 2120#endif
2121 /* Raise STDIN..STDERR refcount so we don't close them */
2122 for (i=0; i < 3; i++)
2123 PerlIOUnix_refcnt_inc(i);
2124 PerlIO_cleantable(aTHX_ &PL_perlio);
2125 /* Restore STDIN..STDERR refcount */
2126 for (i=0; i < 3; i++)
2127 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS		 2128
2129 if (PL_known_layers) {
2130 PerlIO_list_free(aTHX_ PL_known_layers);
2131 PL_known_layers = NULL;
2132 }
2133 if(PL_def_layerlist) {
2134 PerlIO_list_free(aTHX_ PL_def_layerlist);
2135 PL_def_layerlist = NULL;
2136 }
694c95cf
JH		 2137}
2138
2139
2140
9e353e3b 2141/*--------------------------------------------------------------------------------------*/
14a5cf38 2142/*
71200d45 2143 * Bottom-most level for UNIX-like case
14a5cf38 2144 */
9e353e3b 2145
14a5cf38 2146typedef struct {
22569500
NIS		 2147 struct _PerlIO base; /* The generic part */
2148 int fd; /* UNIX like file descriptor */
2149 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2150} PerlIOUnix;
2151
6f9d8c32 2152int
9e353e3b 2153PerlIOUnix_oflags(const char *mode)
760ac839 2154{
14a5cf38
JH		 2155 int oflags = -1;
2156 if (*mode == 'I' || *mode == '#')
2157 mode++;
2158 switch (*mode) {
2159 case 'r':
2160 oflags = O_RDONLY;
2161 if (*++mode == '+') {
2162 oflags = O_RDWR;
2163 mode++;
2164 }
2165 break;
2166
2167 case 'w':
2168 oflags = O_CREAT | O_TRUNC;
2169 if (*++mode == '+') {
2170 oflags |= O_RDWR;
2171 mode++;
2172 }
2173 else
2174 oflags |= O_WRONLY;
2175 break;
2176
2177 case 'a':
2178 oflags = O_CREAT | O_APPEND;
2179 if (*++mode == '+') {
2180 oflags |= O_RDWR;
2181 mode++;
2182 }
2183 else
2184 oflags |= O_WRONLY;
2185 break;
2186 }
2187 if (*mode == 'b') {
2188 oflags |= O_BINARY;
2189 oflags &= ~O_TEXT;
2190 mode++;
2191 }
2192 else if (*mode == 't') {
2193 oflags |= O_TEXT;
2194 oflags &= ~O_BINARY;
2195 mode++;
2196 }
2197 /*
71200d45 2198 * Always open in binary mode
14a5cf38
JH		 2199 */
2200 oflags |= O_BINARY;
2201 if (*mode || oflags == -1) {
2202 SETERRNO(EINVAL, LIB$_INVARG);
2203 oflags = -1;
2204 }
2205 return oflags;
9e353e3b
NIS		 2206}
2207
2208IV
f62ce20a 2209PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2210{
14a5cf38 2211 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2212}
2213
4b803d04 2214IV
2dc2558e 2215PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2216{
2dc2558e 2217 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
93a8090d 2218 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2219 if (*PerlIONext(f)) {
4b069b44 2220 /* We never call down so do any pending stuff now */
03c0554d 2221 PerlIO_flush(PerlIONext(f));
14a5cf38
JH		 2222 s->fd = PerlIO_fileno(PerlIONext(f));
2223 /*
71200d45 2224 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2225 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2226 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2227 */
2228 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2229 }
2230 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2231 return code;
4b803d04
NIS		 2232}
2233
9e353e3b 2234PerlIO *
14a5cf38
JH		 2235PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2236 IV n, const char *mode, int fd, int imode,
2237 int perm, PerlIO *f, int narg, SV **args)
2238{
d9dac8cd 2239 if (PerlIOValid(f)) {
14a5cf38 2240 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2241 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH		 2242 }
2243 if (narg > 0) {
2244 char *path = SvPV_nolen(*args);
2245 if (*mode == '#')
2246 mode++;
2247 else {
2248 imode = PerlIOUnix_oflags(mode);
2249 perm = 0666;
2250 }
2251 if (imode != -1) {
2252 fd = PerlLIO_open3(path, imode, perm);
2253 }
2254 }
2255 if (fd >= 0) {
2256 PerlIOUnix *s;
2257 if (*mode == 'I')
2258 mode++;
2259 if (!f) {
2260 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS		 2261 }
2262 if (!PerlIOValid(f)) {
a33cf58c
NIS		 2263 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2264 return NULL;
2265 }
d9dac8cd 2266 }
a33cf58c 2267 s = PerlIOSelf(f, PerlIOUnix);
14a5cf38
JH		 2268 s->fd = fd;
2269 s->oflags = imode;
2270 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
22569500 2271 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH		 2272 return f;
2273 }
2274 else {
2275 if (f) {
2276 /*
71200d45 2277 * FIXME: pop layers ???
14a5cf38
JH		 2278 */
2279 }
2280 return NULL;
2281 }
9e353e3b
NIS		 2282}
2283
71200d45 2284PerlIO *
ecdeb87c 2285PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS		 2286{
2287 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2288 int fd = os->fd;
ecdeb87c
NIS		 2289 if (flags & PERLIO_DUP_FD) {
2290 fd = PerlLIO_dup(fd);
2291 }
93a8090d 2292 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2293 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 2294 if (f) {
2295 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2296 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2297 s->fd = fd;
93a8090d 2298 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS		 2299 return f;
2300 }
71200d45
NIS		 2301 }
2302 return NULL;
2303}
2304
2305
9e353e3b 2306SSize_t
f62ce20a 2307PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2308{
14a5cf38 2309 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
1fd8f4ce
NIS		 2310 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2311 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
14a5cf38 2312 return 0;
1fd8f4ce 2313 }
14a5cf38
JH		 2314 while (1) {
2315 SSize_t len = PerlLIO_read(fd, vbuf, count);
2316 if (len >= 0 || errno != EINTR) {
2317 if (len < 0)
2318 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2319 else if (len == 0 && count != 0)
2320 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2321 return len;
2322 }
2323 PERL_ASYNC_CHECK();
2324 }
9e353e3b
NIS		 2325}
2326
2327SSize_t
f62ce20a 2328PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2329{
14a5cf38
JH		 2330 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2331 while (1) {
2332 SSize_t len = PerlLIO_write(fd, vbuf, count);
2333 if (len >= 0 || errno != EINTR) {
2334 if (len < 0)
2335 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2336 return len;
2337 }
2338 PERL_ASYNC_CHECK();
06da4f11 2339 }
9e353e3b
NIS		 2340}
2341
2342IV
f62ce20a 2343PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2344{
14a5cf38
JH		 2345 Off_t new =
2346 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2347 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2348 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2349}
2350
2351Off_t
f62ce20a 2352PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2353{
14a5cf38 2354 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2355}
2356
71200d45 2357
9e353e3b 2358IV
f62ce20a 2359PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2360{
14a5cf38
JH		 2361 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2362 int code = 0;
168d5872
NIS		 2363 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2364 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS		 2365 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2366 return 0;
22569500 2367 }
93a8090d
NIS		 2368 }
2369 else {
2370 SETERRNO(EBADF,SS$_IVCHAN);
2371 return -1;
2372 }
14a5cf38
JH		 2373 while (PerlLIO_close(fd) != 0) {
2374 if (errno != EINTR) {
2375 code = -1;
2376 break;
2377 }
2378 PERL_ASYNC_CHECK();
2379 }
2380 if (code == 0) {
2381 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2382 }
2383 return code;
9e353e3b
NIS		 2384}
2385
2386PerlIO_funcs PerlIO_unix = {
2dc2558e 2387 sizeof(PerlIO_funcs),
14a5cf38
JH		 2388 "unix",
2389 sizeof(PerlIOUnix),
2390 PERLIO_K_RAW,
2391 PerlIOUnix_pushed,
44798d05 2392 PerlIOBase_popped,
14a5cf38 2393 PerlIOUnix_open,
86e05cf2 2394 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 2395 NULL,
2396 PerlIOUnix_fileno,
71200d45 2397 PerlIOUnix_dup,
14a5cf38
JH		 2398 PerlIOUnix_read,
2399 PerlIOBase_unread,
2400 PerlIOUnix_write,
2401 PerlIOUnix_seek,
2402 PerlIOUnix_tell,
2403 PerlIOUnix_close,
22569500
NIS		 2404 PerlIOBase_noop_ok, /* flush */
2405 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH		 2406 PerlIOBase_eof,
2407 PerlIOBase_error,
2408 PerlIOBase_clearerr,
2409 PerlIOBase_setlinebuf,
22569500
NIS		 2410 NULL, /* get_base */
2411 NULL, /* get_bufsiz */
2412 NULL, /* get_ptr */
2413 NULL, /* get_cnt */
2414 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2415};
2416
2417/*--------------------------------------------------------------------------------------*/
14a5cf38 2418/*
71200d45 2419 * stdio as a layer
14a5cf38 2420 */
9e353e3b 2421
313e59c8
NIS		 2422#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2423/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2424 broken by the last second glibc 2.3 fix
2425 */
2426#define STDIO_BUFFER_WRITABLE
2427#endif
2428
2429
14a5cf38
JH		 2430typedef struct {
2431 struct _PerlIO base;
22569500 2432 FILE *stdio; /* The stream */
9e353e3b
NIS		 2433} PerlIOStdio;
2434
2435IV
f62ce20a 2436PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2437{
439ba545
NIS		 2438 FILE *s;
2439 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2440 return PerlSIO_fileno(s);
2441 }
2442 errno = EBADF;
2443 return -1;
9e353e3b
NIS		 2444}
2445
766a733e 2446char *
14a5cf38
JH		 2447PerlIOStdio_mode(const char *mode, char *tmode)
2448{
2449 char *ret = tmode;
2450 while (*mode) {
2451 *tmode++ = *mode++;
2452 }
35990314 2453#ifdef PERLIO_USING_CRLF
6ce75a77
JH		 2454 *tmode++ = 'b';
2455#endif
14a5cf38
JH		 2456 *tmode = '\0';
2457 return ret;
2458}
2459
4b803d04 2460IV
2dc2558e 2461PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2462{
1fd8f4ce
NIS		 2463 PerlIO *n;
2464 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2465 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2466 if (toptab == tab) {
2467 /* Top is already stdio - pop self (duplicate) and use original */
2468 PerlIO_pop(aTHX_ f);
2469 return 0;
2470 } else {
2471 int fd = PerlIO_fileno(n);
2472 char tmode[8];
2473 FILE *stdio;
2474 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2475 mode = PerlIOStdio_mode(mode, tmode)))) {
2476 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2477 /* We never call down so do any pending stuff now */
2478 PerlIO_flush(PerlIONext(f));
2479 }
2480 else {
2481 return -1;
2482 }
2483 }
14a5cf38 2484 }
2dc2558e 2485 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS		 2486}
2487
22569500 2488
9e353e3b 2489PerlIO *
4b069b44 2490PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2491{
14a5cf38
JH		 2492 dTHX;
2493 PerlIO *f = NULL;
2494 if (stdio) {
22569500 2495 PerlIOStdio *s;
4b069b44
NIS		 2496 if (!mode || !*mode) {
2497 /* We need to probe to see how we can open the stream
2498 so start with read/write and then try write and read
2499 we dup() so that we can fclose without loosing the fd.
2500
2501 Note that the errno value set by a failing fdopen
2502 varies between stdio implementations.
2503 */
2504 int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2505 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2506 if (!f2) {
a33cf58c 2507 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS		 2508 }
2509 if (!f2) {
a33cf58c 2510 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS		 2511 }
2512 if (!f2) {
2513 /* Don't seem to be able to open */
2514 PerlLIO_close(fd);
2515 return f;
2516 }
2517 fclose(f2);
22569500 2518 }
a33cf58c
NIS		 2519 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2520 s = PerlIOSelf(f, PerlIOStdio);
2521 s->stdio = stdio;
2522 }
14a5cf38
JH		 2523 }
2524 return f;
9e353e3b
NIS		 2525}
2526
2527PerlIO *
14a5cf38
JH		 2528PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2529 IV n, const char *mode, int fd, int imode,
2530 int perm, PerlIO *f, int narg, SV **args)
2531{
2532 char tmode[8];
d9dac8cd 2533 if (PerlIOValid(f)) {
14a5cf38
JH		 2534 char *path = SvPV_nolen(*args);
2535 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS		 2536 FILE *stdio;
2537 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2538 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH		 2539 s->stdio);
2540 if (!s->stdio)
2541 return NULL;
2542 s->stdio = stdio;
1751d015 2543 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2544 return f;
2545 }
2546 else {
2547 if (narg > 0) {
2548 char *path = SvPV_nolen(*args);
2549 if (*mode == '#') {
2550 mode++;
2551 fd = PerlLIO_open3(path, imode, perm);
2552 }
2553 else {
2554 FILE *stdio = PerlSIO_fopen(path, mode);
2555 if (stdio) {
d9dac8cd
NIS		 2556 PerlIOStdio *s;
2557 if (!f) {
2558 f = PerlIO_allocate(aTHX);
2559 }
a33cf58c 2560 if ((f = PerlIO_push(aTHX_ f, self,
14a5cf38 2561 (mode = PerlIOStdio_mode(mode, tmode)),
a33cf58c
NIS		 2562 PerlIOArg))) {
2563 s = PerlIOSelf(f, PerlIOStdio);
2564 s->stdio = stdio;
2565 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2566 }
602c3c4b
NIS		 2567 return f;
2568 }
2569 else {
2570 return NULL;
14a5cf38 2571 }
14a5cf38
JH		 2572 }
2573 }
2574 if (fd >= 0) {
2575 FILE *stdio = NULL;
2576 int init = 0;
2577 if (*mode == 'I') {
2578 init = 1;
2579 mode++;
2580 }
2581 if (init) {
2582 switch (fd) {
2583 case 0:
2584 stdio = PerlSIO_stdin;
2585 break;
2586 case 1:
2587 stdio = PerlSIO_stdout;
2588 break;
2589 case 2:
2590 stdio = PerlSIO_stderr;
2591 break;
2592 }
2593 }
2594 else {
2595 stdio = PerlSIO_fdopen(fd, mode =
2596 PerlIOStdio_mode(mode, tmode));
2597 }
2598 if (stdio) {
d9dac8cd
NIS		 2599 PerlIOStdio *s;
2600 if (!f) {
2601 f = PerlIO_allocate(aTHX);
2602 }
a33cf58c
NIS		 2603 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2604 s = PerlIOSelf(f, PerlIOStdio);
2605 s->stdio = stdio;
2606 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2607 }
14a5cf38
JH		 2608 return f;
2609 }
2610 }
2611 }
ee518936 2612 return NULL;
9e353e3b
NIS		 2613}
2614
1751d015 2615PerlIO *
ecdeb87c 2616PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS		 2617{
2618 /* This assumes no layers underneath - which is what
2619 happens, but is not how I remember it. NI-S 2001/10/16
2620 */
ecdeb87c 2621 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2622 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
ecdeb87c
NIS		 2623 if (flags & PERLIO_DUP_FD) {
2624 int fd = PerlLIO_dup(fileno(stdio));
2625 if (fd >= 0) {
2626 char mode[8];
a33cf58c 2627 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
ecdeb87c
NIS		 2628 }
2629 else {
2630 /* FIXME: To avoid messy error recovery if dup fails
2631 re-use the existing stdio as though flag was not set
2632 */
2633 }
2634 }
694c95cf
JH		 2635 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2636 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS		 2637 }
2638 return f;
2639}
2640
2641IV
f62ce20a 2642PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2643{
1751d015
NIS		 2644#ifdef SOCKS5_VERSION_NAME
2645 int optval;
2646 Sock_size_t optlen = sizeof(int);
2647#endif
2648 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS		 2649 if (!stdio) {
2650 errno = EBADF;
2651 return -1;
2652 }
1751d015 2653 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
694c95cf 2654 /* Do not close it but do flush any buffers */
22569500 2655 return PerlIO_flush(f);
1751d015
NIS		 2656 }
2657 return (
2658#ifdef SOCKS5_VERSION_NAME
2659 (getsockopt
2660 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2661 &optlen) <
2662 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2663#else
2664 PerlSIO_fclose(stdio)
2665#endif
2666 );
2667
2668}
2669
2670
2671
9e353e3b 2672SSize_t
f62ce20a 2673PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2674{
14a5cf38
JH		 2675 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2676 SSize_t got = 0;
2677 if (count == 1) {
2678 STDCHAR *buf = (STDCHAR *) vbuf;
2679 /*
2680 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2681 * stdio does not do that for fread()
14a5cf38
JH		 2682 */
2683 int ch = PerlSIO_fgetc(s);
2684 if (ch != EOF) {
2685 *buf = ch;
2686 got = 1;
2687 }
2688 }
2689 else
2690 got = PerlSIO_fread(vbuf, 1, count, s);
2691 return got;
9e353e3b
NIS		 2692}
2693
2694SSize_t
f62ce20a 2695PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2696{
14a5cf38 2697 SSize_t unread = 0;
93679785
NIS		 2698 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2699
313e59c8 2700#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 2701 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 2702 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2703 STDCHAR *base = PerlIO_get_base(f);
2704 SSize_t cnt = PerlIO_get_cnt(f);
2705 STDCHAR *ptr = PerlIO_get_ptr(f);
2706 SSize_t avail = ptr - base;
2707 if (avail > 0) {
2708 if (avail > count) {
2709 avail = count;
2710 }
2711 ptr -= avail;
2712 Move(buf-avail,ptr,avail,STDCHAR);
2713 count -= avail;
2714 unread += avail;
2715 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS		 2716 if (PerlSIO_feof(s) && unread >= 0)
2717 PerlSIO_clearerr(s);
2718 }
2719 }
313e59c8
NIS		 2720 else
2721#endif
2722 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 2723 /* We can get pointer to buffer but not its base
2724 Do ungetc() but check chars are ending up in the
2725 buffer
2726 */
2727 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2728 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2729 while (count > 0) {
2730 int ch = *--buf & 0xFF;
2731 if (ungetc(ch,s) != ch) {
2732 /* ungetc did not work */
2733 break;
2734 }
2735 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2736 /* Did not change pointer as expected */
2737 fgetc(s); /* get char back again */
2738 break;
2739 }
2740 /* It worked ! */
2741 count--;
2742 unread++;
93679785
NIS		 2743 }
2744 }
2745
2746 if (count > 0) {
2747 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 2748 }
2749 return unread;
9e353e3b
NIS		 2750}
2751
2752SSize_t
f62ce20a 2753PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2754{
14a5cf38
JH		 2755 return PerlSIO_fwrite(vbuf, 1, count,
2756 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2757}
2758
2759IV
f62ce20a 2760PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2761{
14a5cf38
JH		 2762 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2763 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2764}
2765
2766Off_t
f62ce20a 2767PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 2768{
14a5cf38
JH		 2769 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2770 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2771}
2772
2773IV
f62ce20a 2774PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 2775{
14a5cf38
JH		 2776 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2777 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2778 return PerlSIO_fflush(stdio);
2779 }
2780 else {
88b61e10 2781#if 0
14a5cf38
JH		 2782 /*
2783 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2784 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2785 * design is to do _this_ but not have layer above flush this
71200d45 2786 * layer read-to-read
14a5cf38
JH		 2787 */
2788 /*
71200d45 2789 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2790 */
2791 int err = errno;
2792 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2793 errno = err;
88b61e10 2794#endif
14a5cf38
JH		 2795 }
2796 return 0;
9e353e3b
NIS		 2797}
2798
2799IV
f62ce20a 2800PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 2801{
14a5cf38 2802 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2803}
2804
2805IV
f62ce20a 2806PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 2807{
14a5cf38 2808 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2809}
2810
2811void
f62ce20a 2812PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 2813{
14a5cf38 2814 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2815}
2816
2817void
f62ce20a 2818PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS		 2819{
2820#ifdef HAS_SETLINEBUF
14a5cf38 2821 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2822#else
14a5cf38 2823 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2824#endif
2825}
2826
2827#ifdef FILE_base
2828STDCHAR *
f62ce20a 2829PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 2830{
14a5cf38 2831 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2832 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS		 2833}
2834
2835Size_t
f62ce20a 2836PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 2837{
14a5cf38
JH		 2838 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2839 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2840}
2841#endif
2842
2843#ifdef USE_STDIO_PTR
2844STDCHAR *
f62ce20a 2845PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 2846{
14a5cf38 2847 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2848 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2849}
2850
2851SSize_t
f62ce20a 2852PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 2853{
14a5cf38
JH		 2854 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2855 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2856}
2857
2858void
f62ce20a 2859PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2860{
14a5cf38 2861 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 2862 if (ptr != NULL) {
9e353e3b 2863#ifdef STDIO_PTR_LVALUE
22569500 2864 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 2865#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 2866 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH		 2867 assert(PerlSIO_get_cnt(stdio) == (cnt));
2868 }
9e353e3b
NIS		 2869#endif
2870#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2871 /*
71200d45 2872 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2873 */
2874 return;
9e353e3b 2875#endif
22569500 2876#else /* STDIO_PTR_LVALUE */
14a5cf38 2877 PerlProc_abort();
22569500 2878#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH		 2879 }
2880 /*
71200d45 2881 * Now (or only) set cnt
14a5cf38 2882 */
9e353e3b 2883#ifdef STDIO_CNT_LVALUE
14a5cf38 2884 PerlSIO_set_cnt(stdio, cnt);
22569500 2885#else /* STDIO_CNT_LVALUE */
9e353e3b 2886#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2887 PerlSIO_set_ptr(stdio,
2888 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2889 cnt));
22569500 2890#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 2891 PerlProc_abort();
22569500
NIS		 2892#endif /* STDIO_PTR_LVAL_SETS_CNT */
2893#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2894}
2895
93679785 2896
9e353e3b
NIS		 2897#endif
2898
93679785
NIS		 2899IV
2900PerlIOStdio_fill(pTHX_ PerlIO *f)
2901{
2902 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2903 int c;
2904 /*
2905 * fflush()ing read-only streams can cause trouble on some stdio-s
2906 */
2907 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2908 if (PerlSIO_fflush(stdio) != 0)
2909 return EOF;
2910 }
2911 c = PerlSIO_fgetc(stdio);
2912 if (c == EOF)
2913 return EOF;
2914
2915#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS		 2916
2917#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 2918 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 2919 /* Fake ungetc() to the real buffer in case system's ungetc
2920 goes elsewhere
2921 */
2922 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2923 SSize_t cnt = PerlSIO_get_cnt(stdio);
2924 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2925 if (ptr == base+1) {
2926 *--ptr = (STDCHAR) c;
2927 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2928 if (PerlSIO_feof(stdio))
2929 PerlSIO_clearerr(stdio);
2930 return 0;
2931 }
2932 }
313e59c8
NIS		 2933 else
2934#endif
2935 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 2936 STDCHAR ch = c;
2937 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2938 return 0;
2939 }
2940 }
93679785
NIS		 2941#endif
2942
2943#if defined(VMS)
2944 /* An ungetc()d char is handled separately from the regular
2945 * buffer, so we stuff it in the buffer ourselves.
2946 * Should never get called as should hit code above
2947 */
bad9695d
NIS		 2948 *(--((*stdio)->_ptr)) = (unsigned char) c;
2949 (*stdio)->_cnt++;
93679785
NIS		 2950#else
2951 /* If buffer snoop scheme above fails fall back to
9f7cd136 2952 using ungetc().
93679785
NIS		 2953 */
2954 if (PerlSIO_ungetc(c, stdio) != c)
2955 return EOF;
2956#endif
2957 return 0;
2958}
2959
2960
2961
9e353e3b 2962PerlIO_funcs PerlIO_stdio = {
2dc2558e 2963 sizeof(PerlIO_funcs),
14a5cf38
JH		 2964 "stdio",
2965 sizeof(PerlIOStdio),
86e05cf2 2966 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 2967 PerlIOStdio_pushed,
44798d05 2968 PerlIOBase_popped,
14a5cf38 2969 PerlIOStdio_open,
86e05cf2 2970 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 2971 NULL,
2972 PerlIOStdio_fileno,
71200d45 2973 PerlIOStdio_dup,
14a5cf38
JH		 2974 PerlIOStdio_read,
2975 PerlIOStdio_unread,
2976 PerlIOStdio_write,
2977 PerlIOStdio_seek,
2978 PerlIOStdio_tell,
2979 PerlIOStdio_close,
2980 PerlIOStdio_flush,
2981 PerlIOStdio_fill,
2982 PerlIOStdio_eof,
2983 PerlIOStdio_error,
2984 PerlIOStdio_clearerr,
2985 PerlIOStdio_setlinebuf,
9e353e3b 2986#ifdef FILE_base
14a5cf38
JH		 2987 PerlIOStdio_get_base,
2988 PerlIOStdio_get_bufsiz,
9e353e3b 2989#else
14a5cf38
JH		 2990 NULL,
2991 NULL,
9e353e3b
NIS		 2992#endif
2993#ifdef USE_STDIO_PTR
14a5cf38
JH		 2994 PerlIOStdio_get_ptr,
2995 PerlIOStdio_get_cnt,
0eb1d8a4 2996#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38 2997 PerlIOStdio_set_ptrcnt
22569500 2998#else /* STDIO_PTR_LVALUE */
14a5cf38 2999 NULL
22569500
NIS		 3000#endif /* STDIO_PTR_LVALUE */
3001#else /* USE_STDIO_PTR */
14a5cf38
JH		 3002 NULL,
3003 NULL,
3004 NULL
22569500 3005#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 3006};
3007
9e353e3b 3008FILE *
4b069b44 3009PerlIO_exportFILE(PerlIO *f, const char *mode)
9e353e3b 3010{
e87a358a 3011 dTHX;
14a5cf38 3012 FILE *stdio;
8dcb5783 3013 char buf[8];
14a5cf38 3014 PerlIO_flush(f);
4b069b44
NIS		 3015 if (!mode || !*mode) {
3016 mode = PerlIO_modestr(f,buf);
3017 }
a33cf58c 3018 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
14a5cf38 3019 if (stdio) {
a33cf58c
NIS		 3020 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3021 PerlIOStdio *s = PerlIOSelf(f,PerlIOStdio);
3022 s->stdio = stdio;
3023 }
14a5cf38
JH		 3024 }
3025 return stdio;
9e353e3b
NIS		 3026}
3027
9e353e3b
NIS		 3028FILE *
3029PerlIO_findFILE(PerlIO *f)
3030{
14a5cf38
JH		 3031 PerlIOl *l = *f;
3032 while (l) {
3033 if (l->tab == &PerlIO_stdio) {
3034 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3035 return s->stdio;
3036 }
3037 l = *PerlIONext(&l);
f7e7eb72 3038 }
4b069b44
NIS		 3039 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3040 return PerlIO_exportFILE(f, Nullch);
9e353e3b
NIS		 3041}
3042
9e353e3b
NIS		 3043void
3044PerlIO_releaseFILE(PerlIO *p, FILE *f)
3045{
22569500
NIS		 3046 PerlIOl *l;
3047 while ((l = *p)) {
3048 if (l->tab == &PerlIO_stdio) {
3049 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3050 if (s->stdio == f) {
3051 dTHX;
3052 PerlIO_pop(aTHX_ p);
3053 return;
3054 }
3055 }
3056 p = PerlIONext(p);
3057 }
3058 return;
9e353e3b
NIS		 3059}
3060
3061/*--------------------------------------------------------------------------------------*/
14a5cf38 3062/*
71200d45 3063 * perlio buffer layer
14a5cf38 3064 */
9e353e3b 3065
5e2ab84b 3066IV
2dc2558e 3067PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3068{
14a5cf38
JH		 3069 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3070 int fd = PerlIO_fileno(f);
14a5cf38
JH		 3071 if (fd >= 0 && PerlLIO_isatty(fd)) {
3072 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3073 }
4b069b44
NIS		 3074 if (*PerlIONext(f)) {
3075 Off_t posn = PerlIO_tell(PerlIONext(f));
3076 if (posn != (Off_t) - 1) {
3077 b->posn = posn;
3078 }
14a5cf38 3079 }
2dc2558e 3080 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS		 3081}
3082
9e353e3b 3083PerlIO *
14a5cf38
JH		 3084PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3085 IV n, const char *mode, int fd, int imode, int perm,
3086 PerlIO *f, int narg, SV **args)
3087{
04892f78 3088 if (PerlIOValid(f)) {
14a5cf38 3089 PerlIO *next = PerlIONext(f);
04892f78
NIS		 3090 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3091 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
14a5cf38 3092 next, narg, args);
2dc2558e 3093 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH		 3094 return NULL;
3095 }
3096 }
3097 else {
04892f78 3098 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38
JH		 3099 int init = 0;
3100 if (*mode == 'I') {
3101 init = 1;
3102 /*
71200d45 3103 * mode++;
14a5cf38
JH		 3104 */
3105 }
3106 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
d9dac8cd 3107 f, narg, args);
14a5cf38 3108 if (f) {
22569500 3109 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC		 3110 /*
3111 * if push fails during open, open fails. close will pop us.
3112 */
3113 PerlIO_close (f);
3114 return NULL;
3115 } else {
3116 fd = PerlIO_fileno(f);
b26b1ab5
NC		 3117 if (init && fd == 2) {
3118 /*
3119 * Initial stderr is unbuffered
3120 */
3121 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3122 }
23b84778
IZ		 3123#ifdef PERLIO_USING_CRLF
3124# ifdef PERLIO_IS_BINMODE_FD
3125 if (PERLIO_IS_BINMODE_FD(fd))
3126 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3127 else
3128# endif
3129 /*
3130 * do something about failing setmode()? --jhi
3131 */
3132 PerlLIO_setmode(fd, O_BINARY);
3133#endif
14a5cf38
JH		 3134 }
3135 }
ee518936 3136 }
14a5cf38 3137 return f;
9e353e3b
NIS		 3138}
3139
14a5cf38
JH		 3140/*
3141 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 3142 * read or write state
14a5cf38 3143 */
9e353e3b 3144IV
f62ce20a 3145PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3146{
14a5cf38
JH		 3147 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3148 int code = 0;
04892f78 3149 PerlIO *n = PerlIONext(f);
14a5cf38
JH		 3150 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3151 /*
71200d45 3152 * write() the buffer
14a5cf38
JH		 3153 */
3154 STDCHAR *buf = b->buf;
3155 STDCHAR *p = buf;
14a5cf38
JH		 3156 while (p < b->ptr) {
3157 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3158 if (count > 0) {
3159 p += count;
3160 }
3161 else if (count < 0 || PerlIO_error(n)) {
3162 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3163 code = -1;
3164 break;
3165 }
3166 }
3167 b->posn += (p - buf);
3168 }
3169 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3170 STDCHAR *buf = PerlIO_get_base(f);
3171 /*
71200d45 3172 * Note position change
14a5cf38
JH		 3173 */
3174 b->posn += (b->ptr - buf);
3175 if (b->ptr < b->end) {
4b069b44
NIS		 3176 /* We did not consume all of it - try and seek downstream to
3177 our logical position
14a5cf38 3178 */
4b069b44 3179 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS		 3180 /* Reload n as some layers may pop themselves on seek */
3181 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3182 }
ba5c3fe9 3183 else {
4b069b44
NIS		 3184 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3185 data is lost for good - so return saying "ok" having undone
3186 the position adjust
3187 */
3188 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS		 3189 return code;
3190 }
14a5cf38
JH		 3191 }
3192 }
3193 b->ptr = b->end = b->buf;
3194 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3195 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3196 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH		 3197 code = -1;
3198 return code;
6f9d8c32
NIS		 3199}
3200
06da4f11 3201IV
f62ce20a 3202PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 3203{
14a5cf38
JH		 3204 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3205 PerlIO *n = PerlIONext(f);
3206 SSize_t avail;
3207 /*
4b069b44
NIS		 3208 * Down-stream flush is defined not to loose read data so is harmless.
3209 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38
JH		 3210 */
3211 if (PerlIO_flush(f) != 0)
3212 return -1;
3213 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 3214 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH		 3215
3216 if (!b->buf)
22569500 3217 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38
JH		 3218
3219 b->ptr = b->end = b->buf;
4b069b44
NIS		 3220
3221 if (!PerlIOValid(n)) {
3222 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3223 return -1;
3224 }
3225
14a5cf38
JH		 3226 if (PerlIO_fast_gets(n)) {
3227 /*
04892f78 3228 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH		 3229 * ->Read() because that will loop till it gets what we asked for
3230 * which may hang on a pipe etc. Instead take anything it has to
71200d45 3231 * hand, or ask it to fill _once_.
14a5cf38
JH		 3232 */
3233 avail = PerlIO_get_cnt(n);
3234 if (avail <= 0) {
3235 avail = PerlIO_fill(n);
3236 if (avail == 0)
3237 avail = PerlIO_get_cnt(n);
3238 else {
3239 if (!PerlIO_error(n) && PerlIO_eof(n))
3240 avail = 0;
3241 }
3242 }
3243 if (avail > 0) {
3244 STDCHAR *ptr = PerlIO_get_ptr(n);
3245 SSize_t cnt = avail;
eb160463 3246 if (avail > (SSize_t)b->bufsiz)
14a5cf38
JH		 3247 avail = b->bufsiz;
3248 Copy(ptr, b->buf, avail, STDCHAR);
3249 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3250 }
3251 }
3252 else {
3253 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3254 }
3255 if (avail <= 0) {
3256 if (avail == 0)
3257 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3258 else
3259 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3260 return -1;
3261 }
3262 b->end = b->buf + avail;
3263 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3264 return 0;
06da4f11
NIS		 3265}
3266
6f9d8c32 3267SSize_t
f62ce20a 3268PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 3269{
14a5cf38 3270 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
04892f78 3271 if (PerlIOValid(f)) {
14a5cf38
JH		 3272 if (!b->ptr)
3273 PerlIO_get_base(f);
f62ce20a 3274 return PerlIOBase_read(aTHX_ f, vbuf, count);
14a5cf38
JH		 3275 }
3276 return 0;
6f9d8c32
NIS		 3277}
3278
9e353e3b 3279SSize_t
f62ce20a 3280PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3281{
14a5cf38
JH		 3282 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3283 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3284 SSize_t unread = 0;
3285 SSize_t avail;
3286 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3287 PerlIO_flush(f);
3288 if (!b->buf)
3289 PerlIO_get_base(f);
3290 if (b->buf) {
3291 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3292 /*
3293 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3294 * which have been read back to buffer start
14a5cf38
JH		 3295 */
3296 avail = (b->ptr - b->buf);
3297 }
3298 else {
3299 /*
3300 * Buffer is idle, set it up so whole buffer is available for
71200d45 3301 * unread
14a5cf38
JH		 3302 */
3303 avail = b->bufsiz;
3304 b->end = b->buf + avail;
3305 b->ptr = b->end;
3306 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3307 /*
71200d45 3308 * Buffer extends _back_ from where we are now
14a5cf38
JH		 3309 */
3310 b->posn -= b->bufsiz;
3311 }
3312 if (avail > (SSize_t) count) {
3313 /*
71200d45 3314 * If we have space for more than count, just move count
14a5cf38
JH		 3315 */
3316 avail = count;
3317 }
3318 if (avail > 0) {
3319 b->ptr -= avail;
3320 buf -= avail;
3321 /*
3322 * In simple stdio-like ungetc() case chars will be already
71200d45 3323 * there
14a5cf38
JH		 3324 */
3325 if (buf != b->ptr) {
3326 Copy(buf, b->ptr, avail, STDCHAR);
3327 }
3328 count -= avail;
3329 unread += avail;
3330 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3331 }
3332 }
93679785
NIS		 3333 if (count > 0) {
3334 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3335 }
14a5cf38 3336 return unread;
760ac839
LW		 3337}
3338
9e353e3b 3339SSize_t
f62ce20a 3340PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3341{
14a5cf38
JH		 3342 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3343 const STDCHAR *buf = (const STDCHAR *) vbuf;
3344 Size_t written = 0;
3345 if (!b->buf)
3346 PerlIO_get_base(f);
3347 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3348 return 0;
3349 while (count > 0) {
3350 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3351 if ((SSize_t) count < avail)
3352 avail = count;
3353 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3354 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3355 while (avail > 0) {
3356 int ch = *buf++;
3357 *(b->ptr)++ = ch;
3358 count--;
3359 avail--;
3360 written++;
3361 if (ch == '\n') {
3362 PerlIO_flush(f);
3363 break;
3364 }
3365 }
3366 }
3367 else {
3368 if (avail) {
3369 Copy(buf, b->ptr, avail, STDCHAR);
3370 count -= avail;
3371 buf += avail;
3372 written += avail;
3373 b->ptr += avail;
3374 }
3375 }
3376 if (b->ptr >= (b->buf + b->bufsiz))
3377 PerlIO_flush(f);
3378 }
3379 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3380 PerlIO_flush(f);
3381 return written;
9e353e3b
NIS		 3382}
3383
3384IV
f62ce20a 3385PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3386{
14a5cf38
JH		 3387 IV code;
3388 if ((code = PerlIO_flush(f)) == 0) {
3389 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3390 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3391 code = PerlIO_seek(PerlIONext(f), offset, whence);
3392 if (code == 0) {
3393 b->posn = PerlIO_tell(PerlIONext(f));
3394 }
9e353e3b 3395 }
14a5cf38 3396 return code;
9e353e3b
NIS		 3397}
3398
3399Off_t
f62ce20a 3400PerlIOBuf_tell(pTHX_ PerlIO *f)
9e353e3b 3401{
14a5cf38
JH		 3402 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3403 /*
71200d45 3404 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3405 */
3406 Off_t posn = b->posn;
3407 if (b->buf) {
3408 /*
71200d45 3409 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3410 */
3411 posn += (b->ptr - b->buf);
3412 }
3413 return posn;
9e353e3b
NIS		 3414}
3415
3416IV
44798d05
NIS		 3417PerlIOBuf_popped(pTHX_ PerlIO *f)
3418{
3419 IV code = PerlIOBase_popped(aTHX_ f);
3420 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3421 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3422 Safefree(b->buf);
3423 }
3424 b->buf = NULL;
3425 b->ptr = b->end = b->buf;
3426 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3427 return code;
3428}
3429
3430IV
f62ce20a 3431PerlIOBuf_close(pTHX_ PerlIO *f)
9e353e3b 3432{
f62ce20a 3433 IV code = PerlIOBase_close(aTHX_ f);
14a5cf38
JH		 3434 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3435 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3436 Safefree(b->buf);
14a5cf38
JH		 3437 }
3438 b->buf = NULL;
3439 b->ptr = b->end = b->buf;
3440 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3441 return code;
760ac839
LW		 3442}
3443
9e353e3b 3444STDCHAR *
f62ce20a 3445PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3446{
14a5cf38
JH		 3447 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3448 if (!b->buf)
3449 PerlIO_get_base(f);
3450 return b->ptr;
9e353e3b
NIS		 3451}
3452
05d1247b 3453SSize_t
f62ce20a 3454PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3455{
14a5cf38
JH		 3456 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3457 if (!b->buf)
3458 PerlIO_get_base(f);
3459 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3460 return (b->end - b->ptr);
3461 return 0;
9e353e3b
NIS		 3462}
3463
3464STDCHAR *
f62ce20a 3465PerlIOBuf_get_base(pTHX_ PerlIO *f)
9e353e3b 3466{
14a5cf38
JH		 3467 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3468 if (!b->buf) {
3469 if (!b->bufsiz)
3470 b->bufsiz = 4096;
a1ea730d 3471 b->buf =
7fcdafbd 3472 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3473 if (!b->buf) {
3474 b->buf = (STDCHAR *) & b->oneword;
3475 b->bufsiz = sizeof(b->oneword);
3476 }
3477 b->ptr = b->buf;
3478 b->end = b->ptr;
06da4f11 3479 }
14a5cf38 3480 return b->buf;
9e353e3b
NIS		 3481}
3482
3483Size_t
f62ce20a 3484PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3485{
14a5cf38
JH		 3486 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3487 if (!b->buf)
3488 PerlIO_get_base(f);
3489 return (b->end - b->buf);
9e353e3b
NIS		 3490}
3491
3492void
f62ce20a 3493PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3494{
14a5cf38
JH		 3495 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3496 if (!b->buf)
3497 PerlIO_get_base(f);
3498 b->ptr = ptr;
3499 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
14a5cf38
JH		 3500 assert(PerlIO_get_cnt(f) == cnt);
3501 assert(b->ptr >= b->buf);
3502 }
3503 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3504}
3505
71200d45 3506PerlIO *
ecdeb87c 3507PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 3508{
ecdeb87c 3509 return PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 3510}
3511
3512
3513
9e353e3b 3514PerlIO_funcs PerlIO_perlio = {
2dc2558e 3515 sizeof(PerlIO_funcs),
14a5cf38
JH		 3516 "perlio",
3517 sizeof(PerlIOBuf),
86e05cf2 3518 PERLIO_K_BUFFERED|PERLIO_K_RAW,
14a5cf38 3519 PerlIOBuf_pushed,
44798d05 3520 PerlIOBuf_popped,
14a5cf38 3521 PerlIOBuf_open,
86e05cf2 3522 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3523 NULL,
3524 PerlIOBase_fileno,
71200d45 3525 PerlIOBuf_dup,
14a5cf38
JH		 3526 PerlIOBuf_read,
3527 PerlIOBuf_unread,
3528 PerlIOBuf_write,
3529 PerlIOBuf_seek,
3530 PerlIOBuf_tell,
3531 PerlIOBuf_close,
3532 PerlIOBuf_flush,
3533 PerlIOBuf_fill,
3534 PerlIOBase_eof,
3535 PerlIOBase_error,
3536 PerlIOBase_clearerr,
3537 PerlIOBase_setlinebuf,
3538 PerlIOBuf_get_base,
3539 PerlIOBuf_bufsiz,
3540 PerlIOBuf_get_ptr,
3541 PerlIOBuf_get_cnt,
3542 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3543};
3544
66ecd56b 3545/*--------------------------------------------------------------------------------------*/
14a5cf38 3546/*
71200d45 3547 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3548 */
5e2ab84b
NIS		 3549
3550IV
f62ce20a 3551PerlIOPending_fill(pTHX_ PerlIO *f)
5e2ab84b 3552{
14a5cf38 3553 /*
71200d45 3554 * Should never happen
14a5cf38
JH		 3555 */
3556 PerlIO_flush(f);
3557 return 0;
5e2ab84b
NIS		 3558}
3559
3560IV
f62ce20a 3561PerlIOPending_close(pTHX_ PerlIO *f)
5e2ab84b 3562{
14a5cf38 3563 /*
71200d45 3564 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3565 */
3566 PerlIO_flush(f);
3567 return PerlIO_close(f);
5e2ab84b
NIS		 3568}
3569
3570IV
f62ce20a 3571PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
5e2ab84b 3572{
14a5cf38 3573 /*
71200d45 3574 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3575 */
3576 PerlIO_flush(f);
3577 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3578}
3579
3580
3581IV
f62ce20a 3582PerlIOPending_flush(pTHX_ PerlIO *f)
5e2ab84b 3583{
14a5cf38
JH		 3584 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3585 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3586 Safefree(b->buf);
14a5cf38
JH		 3587 b->buf = NULL;
3588 }
3589 PerlIO_pop(aTHX_ f);
3590 return 0;
5e2ab84b
NIS		 3591}
3592
3593void
f62ce20a 3594PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3595{
14a5cf38
JH		 3596 if (cnt <= 0) {
3597 PerlIO_flush(f);
3598 }
3599 else {
f62ce20a 3600 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
14a5cf38 3601 }
5e2ab84b
NIS		 3602}
3603
3604IV
2dc2558e 3605PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3606{
2dc2558e 3607 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38
JH		 3608 PerlIOl *l = PerlIOBase(f);
3609 /*
71200d45
NIS		 3610 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3611 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3612 */
3613 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3614 (PerlIOBase(PerlIONext(f))->
3615 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3616 return code;
5e2ab84b
NIS		 3617}
3618
3619SSize_t
f62ce20a 3620PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
5e2ab84b 3621{
14a5cf38
JH		 3622 SSize_t avail = PerlIO_get_cnt(f);
3623 SSize_t got = 0;
eb160463 3624 if ((SSize_t)count < avail)
14a5cf38
JH		 3625 avail = count;
3626 if (avail > 0)
f62ce20a 3627 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
eb160463 3628 if (got >= 0 && got < (SSize_t)count) {
14a5cf38
JH		 3629 SSize_t more =
3630 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3631 if (more >= 0 || got == 0)
3632 got += more;
3633 }
3634 return got;
5e2ab84b
NIS		 3635}
3636
5e2ab84b 3637PerlIO_funcs PerlIO_pending = {
2dc2558e 3638 sizeof(PerlIO_funcs),
14a5cf38
JH		 3639 "pending",
3640 sizeof(PerlIOBuf),
86e05cf2 3641 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
14a5cf38 3642 PerlIOPending_pushed,
44798d05 3643 PerlIOBuf_popped,
14a5cf38 3644 NULL,
86e05cf2 3645 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3646 NULL,
3647 PerlIOBase_fileno,
71200d45 3648 PerlIOBuf_dup,
14a5cf38
JH		 3649 PerlIOPending_read,
3650 PerlIOBuf_unread,
3651 PerlIOBuf_write,
3652 PerlIOPending_seek,
3653 PerlIOBuf_tell,
3654 PerlIOPending_close,
3655 PerlIOPending_flush,
3656 PerlIOPending_fill,
3657 PerlIOBase_eof,
3658 PerlIOBase_error,
3659 PerlIOBase_clearerr,
3660 PerlIOBase_setlinebuf,
3661 PerlIOBuf_get_base,
3662 PerlIOBuf_bufsiz,
3663 PerlIOBuf_get_ptr,
3664 PerlIOBuf_get_cnt,
3665 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3666};
3667
3668
3669
3670/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3671/*
3672 * crlf - translation On read translate CR,LF to "\n" we do this by
3673 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3674 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3675 */
3676
14a5cf38 3677typedef struct {
22569500
NIS		 3678 PerlIOBuf base; /* PerlIOBuf stuff */
3679 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3680 * buffer */
99efab12
NIS		 3681} PerlIOCrlf;
3682
f5b9d040 3683IV
2dc2558e 3684PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
f5b9d040 3685{
14a5cf38
JH		 3686 IV code;
3687 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
2dc2558e 3688 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b 3689#if 0
14a5cf38
JH		 3690 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3691 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3692 PerlIOBase(f)->flags);
5e2ab84b 3693#endif
14a5cf38 3694 return code;
f5b9d040
NIS		 3695}
3696
3697
99efab12 3698SSize_t
f62ce20a 3699PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 3700{
14a5cf38
JH		 3701 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3702 if (c->nl) {
3703 *(c->nl) = 0xd;
3704 c->nl = NULL;
3705 }
3706 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 3707 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 3708 else {
3709 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3710 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3711 SSize_t unread = 0;
3712 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3713 PerlIO_flush(f);
3714 if (!b->buf)
3715 PerlIO_get_base(f);
3716 if (b->buf) {
3717 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3718 b->end = b->ptr = b->buf + b->bufsiz;
3719 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3720 b->posn -= b->bufsiz;
3721 }
3722 while (count > 0 && b->ptr > b->buf) {
3723 int ch = *--buf;
3724 if (ch == '\n') {
3725 if (b->ptr - 2 >= b->buf) {
3726 *--(b->ptr) = 0xa;
3727 *--(b->ptr) = 0xd;
3728 unread++;
3729 count--;
3730 }
3731 else {
3732 buf++;
3733 break;
3734 }
3735 }