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The CR at EOF fix earlier broke CR at end-of-buffer.
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
71200d45 2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW		 5 */
6
14a5cf38 7/*
71200d45 8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 9 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 10 * Invent a dSYS macro to abstract this out
14a5cf38 11 */
7bcba3d4
NIS		 12#ifdef PERL_IMPLICIT_SYS
13#define dSYS dTHX
14#else
15#define dSYS dNOOP
16#endif
17
760ac839 18#define VOIDUSED 1
12ae5dfc
JH		 19#ifdef PERL_MICRO
20# include "uconfig.h"
21#else
22# include "config.h"
23#endif
760ac839 24
6f9d8c32 25#define PERLIO_NOT_STDIO 0
760ac839 26#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 27/*
71200d45 28 * #define PerlIO FILE
14a5cf38 29 */
760ac839
LW		 30#endif
31/*
6f9d8c32 32 * This file provides those parts of PerlIO abstraction
88b61e10 33 * which are not #defined in perlio.h.
6f9d8c32 34 * Which these are depends on various Configure #ifdef's
760ac839
LW		 35 */
36
37#include "EXTERN.h"
864dbfa3 38#define PERL_IN_PERLIO_C
760ac839
LW		 39#include "perl.h"
40
32af7c23
CL		 41#ifdef PERL_IMPLICIT_CONTEXT
42#undef dSYS
43#define dSYS dTHX
44#endif
45
0c4f7ff0
NIS		 46#include "XSUB.h"
47
60382766 48int
f5b9d040 49perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 50{
14a5cf38 51 /*
71200d45 52 * This used to be contents of do_binmode in doio.c
14a5cf38 53 */
60382766
NIS		 54#ifdef DOSISH
55# if defined(atarist) || defined(__MINT__)
f5b9d040 56 if (!fflush(fp)) {
60382766 57 if (mode & O_BINARY)
14a5cf38 58 ((FILE *) fp)->_flag |= _IOBIN;
60382766 59 else
14a5cf38 60 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 61 return 1;
62 }
63 return 0;
64# else
eb73beca 65 dTHX;
14a5cf38
JH		 66#ifdef NETWARE
67 if (PerlLIO_setmode(fp, mode) != -1) {
68#else
f5b9d040 69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 70#endif
60382766 71# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 72 /*
71200d45 73 * The translation mode of the stream is maintained independent of
14a5cf38 74 * the translation mode of the fd in the Borland RTL (heavy
71200d45 75 * digging through their runtime sources reveal). User has to set
14a5cf38 76 * the mode explicitly for the stream (though they don't document
71200d45 77 * this anywhere). GSAR 97-5-24
60382766 78 */
14a5cf38 79 fseek(fp, 0L, 0);
60382766 80 if (mode & O_BINARY)
f5b9d040 81 fp->flags |= _F_BIN;
60382766 82 else
14a5cf38 83 fp->flags &= ~_F_BIN;
60382766
NIS		 84# endif
85 return 1;
86 }
87 else
88 return 0;
89# endif
90#else
91# if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
93 return 1;
94 else
95 return 0;
96# else
97 return 1;
98# endif
99#endif
100}
101
06c7082d
NIS		 102#ifndef O_ACCMODE
103#define O_ACCMODE 3 /* Assume traditional implementation */
104#endif
105
106int
107PerlIO_intmode2str(int rawmode, char *mode, int *writing)
108{
109 int result = rawmode & O_ACCMODE;
110 int ix = 0;
111 int ptype;
112 switch (result) {
113 case O_RDONLY:
114 ptype = IoTYPE_RDONLY;
115 break;
116 case O_WRONLY:
117 ptype = IoTYPE_WRONLY;
118 break;
119 case O_RDWR:
120 default:
121 ptype = IoTYPE_RDWR;
122 break;
123 }
124 if (writing)
125 *writing = (result != O_RDONLY);
126
127 if (result == O_RDONLY) {
128 mode[ix++] = 'r';
129 }
130#ifdef O_APPEND
131 else if (rawmode & O_APPEND) {
132 mode[ix++] = 'a';
133 if (result != O_WRONLY)
134 mode[ix++] = '+';
135 }
136#endif
137 else {
138 if (result == O_WRONLY)
139 mode[ix++] = 'w';
140 else {
141 mode[ix++] = 'r';
142 mode[ix++] = '+';
143 }
144 }
145 if (rawmode & O_BINARY)
146 mode[ix++] = 'b';
147 mode[ix] = '\0';
148 return ptype;
149}
150
eb73beca
NIS		 151#ifndef PERLIO_LAYERS
152int
153PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
154{
14a5cf38
JH		 155 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
156 return 0;
157 }
158 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
159 /*
71200d45 160 * NOTREACHED
14a5cf38
JH		 161 */
162 return -1;
eb73beca
NIS		 163}
164
13621cfb
NIS		 165void
166PerlIO_destruct(pTHX)
167{
168}
169
f5b9d040
NIS		 170int
171PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
172{
92bff44d 173#ifdef USE_SFIO
14a5cf38 174 return 1;
92bff44d 175#else
14a5cf38 176 return perlsio_binmode(fp, iotype, mode);
92bff44d 177#endif
f5b9d040 178}
60382766 179
e0fa5af2 180PerlIO *
ecdeb87c 181PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 182{
7114a2d2 183#ifndef PERL_MICRO
e0fa5af2
NIS		 184 if (f) {
185 int fd = PerlLIO_dup(PerlIO_fileno(f));
186 if (fd >= 0) {
06c7082d
NIS		 187 char mode[8];
188 int omode = fcntl(fd, F_GETFL);
189 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 190 /* the r+ is a hack */
06c7082d 191 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS		 192 }
193 return NULL;
194 }
195 else {
196 SETERRNO(EBADF, SS$_IVCHAN);
197 }
7114a2d2 198#endif
e0fa5af2
NIS		 199 return NULL;
200}
201
202
14a5cf38 203/*
71200d45 204 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 205 */
ee518936
NIS		 206
207PerlIO *
14a5cf38
JH		 208PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
209 int imode, int perm, PerlIO *old, int narg, SV **args)
210{
7cf31beb
NIS		 211 if (narg) {
212 if (narg > 1) {
3b8752bb 213 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 214 }
14a5cf38
JH		 215 if (*args == &PL_sv_undef)
216 return PerlIO_tmpfile();
217 else {
218 char *name = SvPV_nolen(*args);
219 if (*mode == '#') {
220 fd = PerlLIO_open3(name, imode, perm);
221 if (fd >= 0)
222 return PerlIO_fdopen(fd, (char *) mode + 1);
223 }
224 else if (old) {
225 return PerlIO_reopen(name, mode, old);
226 }
227 else {
228 return PerlIO_open(name, mode);
229 }
230 }
231 }
232 else {
233 return PerlIO_fdopen(fd, (char *) mode);
234 }
235 return NULL;
ee518936
NIS		 236}
237
0c4f7ff0
NIS		 238XS(XS_PerlIO__Layer__find)
239{
14a5cf38
JH		 240 dXSARGS;
241 if (items < 2)
242 Perl_croak(aTHX_ "Usage class->find(name[,load])");
243 else {
244 char *name = SvPV_nolen(ST(1));
245 ST(0) = (strEQ(name, "crlf")
246 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
247 XSRETURN(1);
248 }
0c4f7ff0
NIS		 249}
250
251
252void
253Perl_boot_core_PerlIO(pTHX)
254{
14a5cf38 255 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 256}
257
ac27b0f5
NIS		 258#endif
259
32e30700 260
6f9d8c32 261#ifdef PERLIO_IS_STDIO
760ac839
LW		 262
263void
e8632036 264PerlIO_init(pTHX)
760ac839 265{
14a5cf38
JH		 266 /*
267 * Does nothing (yet) except force this file to be included in perl
71200d45 268 * binary. That allows this file to force inclusion of other functions
14a5cf38 269 * that may be required by loadable extensions e.g. for
71200d45 270 * FileHandle::tmpfile
14a5cf38 271 */
760ac839
LW		 272}
273
33dcbb9a 274#undef PerlIO_tmpfile
275PerlIO *
8ac85365 276PerlIO_tmpfile(void)
33dcbb9a 277{
14a5cf38 278 return tmpfile();
33dcbb9a 279}
280
14a5cf38 281#else /* PERLIO_IS_STDIO */
760ac839
LW		 282
283#ifdef USE_SFIO
284
285#undef HAS_FSETPOS
286#undef HAS_FGETPOS
287
14a5cf38
JH		 288/*
289 * This section is just to make sure these functions get pulled in from
71200d45 290 * libsfio.a
14a5cf38 291 */
760ac839
LW		 292
293#undef PerlIO_tmpfile
294PerlIO *
c78749f2 295PerlIO_tmpfile(void)
760ac839 296{
14a5cf38 297 return sftmp(0);
760ac839
LW		 298}
299
300void
e8632036 301PerlIO_init(pTHX)
760ac839 302{
14a5cf38
JH		 303 /*
304 * Force this file to be included in perl binary. Which allows this
305 * file to force inclusion of other functions that may be required by
71200d45 306 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 307 */
760ac839 308
14a5cf38 309 /*
71200d45 310 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 311 * results in a lot of lseek()s to regular files and lot of small
71200d45 312 * writes to pipes.
14a5cf38
JH		 313 */
314 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 315}
316
92bff44d
NIS		 317PerlIO *
318PerlIO_importFILE(FILE *stdio, int fl)
319{
14a5cf38
JH		 320 int fd = fileno(stdio);
321 PerlIO *r = PerlIO_fdopen(fd, "r+");
322 return r;
92bff44d
NIS		 323}
324
325FILE *
326PerlIO_findFILE(PerlIO *pio)
327{
14a5cf38
JH		 328 int fd = PerlIO_fileno(pio);
329 FILE *f = fdopen(fd, "r+");
330 PerlIO_flush(pio);
331 if (!f && errno == EINVAL)
332 f = fdopen(fd, "w");
333 if (!f && errno == EINVAL)
334 f = fdopen(fd, "r");
335 return f;
92bff44d
NIS		 336}
337
338
14a5cf38 339#else /* USE_SFIO */
6f9d8c32 340/*======================================================================================*/
14a5cf38 341/*
71200d45 342 * Implement all the PerlIO interface ourselves.
9e353e3b 343 */
760ac839 344
76ced9ad
NIS		 345#include "perliol.h"
346
14a5cf38
JH		 347/*
348 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 349 * files
14a5cf38 350 */
02f66e2f
NIS		 351#ifdef I_UNISTD
352#include <unistd.h>
353#endif
06da4f11
NIS		 354#ifdef HAS_MMAP
355#include <sys/mman.h>
356#endif
357
02f66e2f 358
14a5cf38
JH		 359void PerlIO_debug(const char *fmt, ...)
360 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 361
6f9d8c32 362void
14a5cf38
JH		 363PerlIO_debug(const char *fmt, ...)
364{
365 static int dbg = 0;
366 va_list ap;
367 dSYS;
368 va_start(ap, fmt);
369 if (!dbg) {
370 char *s = PerlEnv_getenv("PERLIO_DEBUG");
371 if (s && *s)
372 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
373 else
374 dbg = -1;
375 }
376 if (dbg > 0) {
377 dTHX;
70ace5da
NIS		 378#ifdef USE_ITHREADS
379 /* Use fixed buffer as sv_catpvf etc. needs SVs */
380 char buffer[1024];
381 char *s;
382 STRLEN len;
383 s = CopFILE(PL_curcop);
384 if (!s)
385 s = "(none)";
386 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
387 len = strlen(buffer);
388 vsprintf(buffer+len, fmt, ap);
389 PerlLIO_write(dbg, buffer, strlen(buffer));
390#else
14a5cf38
JH		 391 SV *sv = newSVpvn("", 0);
392 char *s;
393 STRLEN len;
394 s = CopFILE(PL_curcop);
395 if (!s)
396 s = "(none)";
397 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
398 (IV) CopLINE(PL_curcop));
399 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
400
401 s = SvPV(sv, len);
402 PerlLIO_write(dbg, s, len);
403 SvREFCNT_dec(sv);
70ace5da 404#endif
14a5cf38
JH		 405 }
406 va_end(ap);
6f9d8c32
NIS		 407}
408
9e353e3b
NIS		 409/*--------------------------------------------------------------------------------------*/
410
14a5cf38 411/*
71200d45 412 * Inner level routines
14a5cf38 413 */
9e353e3b 414
14a5cf38 415/*
71200d45 416 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 417 */
05d1247b 418#define PERLIO_TABLE_SIZE 64
6f9d8c32 419
760ac839 420PerlIO *
5f1a76d0 421PerlIO_allocate(pTHX)
6f9d8c32 422{
14a5cf38 423 /*
71200d45 424 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 425 */
426 PerlIO **last;
427 PerlIO *f;
a1ea730d 428 last = &PL_perlio;
14a5cf38
JH		 429 while ((f = *last)) {
430 int i;
431 last = (PerlIO **) (f);
432 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
433 if (!*++f) {
434 return f;
435 }
436 }
437 }
3a1ee7e8 438 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH		 439 if (!f) {
440 return NULL;
441 }
442 *last = f;
443 return f + 1;
05d1247b
NIS		 444}
445
a1ea730d
NIS		 446#undef PerlIO_fdupopen
447PerlIO *
ecdeb87c 448PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d
NIS		 449{
450 if (f && *f) {
451 PerlIO_funcs *tab = PerlIOBase(f)->tab;
452 PerlIO *new;
fe5a182c 453 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
ecdeb87c 454 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
a1ea730d
NIS		 455 return new;
456 }
457 else {
458 SETERRNO(EBADF, SS$_IVCHAN);
459 return NULL;
460 }
461}
462
463void
5f1a76d0 464PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 465{
14a5cf38
JH		 466 PerlIO *table = *tablep;
467 if (table) {
468 int i;
469 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
470 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
471 PerlIO *f = table + i;
472 if (*f) {
473 PerlIO_close(f);
474 }
475 }
3a1ee7e8 476 Safefree(table);
14a5cf38 477 *tablep = NULL;
05d1247b 478 }
05d1247b
NIS		 479}
480
fcf2db38
NIS		 481
482PerlIO_list_t *
3a1ee7e8 483PerlIO_list_alloc(pTHX)
fcf2db38 484{
14a5cf38
JH		 485 PerlIO_list_t *list;
486 Newz('L', list, 1, PerlIO_list_t);
487 list->refcnt = 1;
488 return list;
fcf2db38
NIS		 489}
490
491void
3a1ee7e8 492PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 493{
14a5cf38
JH		 494 if (list) {
495 if (--list->refcnt == 0) {
496 if (list->array) {
14a5cf38
JH		 497 IV i;
498 for (i = 0; i < list->cur; i++) {
499 if (list->array[i].arg)
500 SvREFCNT_dec(list->array[i].arg);
501 }
502 Safefree(list->array);
503 }
504 Safefree(list);
505 }
506 }
fcf2db38
NIS		 507}
508
509void
3a1ee7e8 510PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 511{
14a5cf38
JH		 512 PerlIO_pair_t *p;
513 if (list->cur >= list->len) {
514 list->len += 8;
515 if (list->array)
516 Renew(list->array, list->len, PerlIO_pair_t);
517 else
518 New('l', list->array, list->len, PerlIO_pair_t);
519 }
520 p = &(list->array[list->cur++]);
521 p->funcs = funcs;
522 if ((p->arg = arg)) {
523 SvREFCNT_inc(arg);
524 }
fcf2db38
NIS		 525}
526
3a1ee7e8
NIS		 527PerlIO_list_t *
528PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
529{
694c95cf
JH		 530 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
531 if (proto) {
532 int i;
533 list = PerlIO_list_alloc(aTHX);
534 for (i=0; i < proto->cur; i++) {
535 SV *arg = Nullsv;
536 if (proto->array[i].arg)
537 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
538 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
539 }
3a1ee7e8
NIS		 540 }
541 return list;
542}
4a4a6116 543
05d1247b 544void
3a1ee7e8 545PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 546{
3aaf42a7 547#ifdef USE_ITHREADS
3a1ee7e8
NIS		 548 PerlIO **table = &proto->Iperlio;
549 PerlIO *f;
550 PL_perlio = NULL;
551 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
552 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
553 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 554 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS		 555 while ((f = *table)) {
556 int i;
557 table = (PerlIO **) (f++);
558 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
559 if (*f) {
93a8090d 560 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS		 561 }
562 f++;
563 }
564 }
3aaf42a7 565#endif
9a6404c5
DM		 566}
567
568void
13621cfb
NIS		 569PerlIO_destruct(pTHX)
570{
a1ea730d 571 PerlIO **table = &PL_perlio;
14a5cf38 572 PerlIO *f;
694c95cf
JH		 573#ifdef USE_ITHREADS
574 PerlIO_debug("Destruct %p\n",aTHX);
575#endif
14a5cf38
JH		 576 while ((f = *table)) {
577 int i;
578 table = (PerlIO **) (f++);
579 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
580 PerlIO *x = f;
581 PerlIOl *l;
582 while ((l = *x)) {
583 if (l->tab->kind & PERLIO_K_DESTRUCT) {
584 PerlIO_debug("Destruct popping %s\n", l->tab->name);
585 PerlIO_flush(x);
586 PerlIO_pop(aTHX_ x);
587 }
588 else {
589 x = PerlIONext(x);
590 }
591 }
592 f++;
593 }
594 }
3a1ee7e8
NIS		 595 PerlIO_list_free(aTHX_ PL_known_layers);
596 PL_known_layers = NULL;
597 PerlIO_list_free(aTHX_ PL_def_layerlist);
598 PL_def_layerlist = NULL;
13621cfb
NIS		 599}
600
601void
a999f61b 602PerlIO_pop(pTHX_ PerlIO *f)
760ac839 603{
14a5cf38
JH		 604 PerlIOl *l = *f;
605 if (l) {
fe5a182c 606 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH		 607 if (l->tab->Popped) {
608 /*
609 * If popped returns non-zero do not free its layer structure
610 * it has either done so itself, or it is shared and still in
71200d45 611 * use
14a5cf38 612 */
f62ce20a 613 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH		 614 return;
615 }
616 *f = l->next;;
3a1ee7e8 617 Safefree(l);
a8c08ecd 618 }
6f9d8c32
NIS		 619}
620
9e353e3b 621/*--------------------------------------------------------------------------------------*/
14a5cf38 622/*
71200d45 623 * XS Interface for perl code
14a5cf38 624 */
9e353e3b 625
fcf2db38 626PerlIO_funcs *
2edd7e44 627PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 628{
14a5cf38
JH		 629 IV i;
630 if ((SSize_t) len <= 0)
631 len = strlen(name);
3a1ee7e8
NIS		 632 for (i = 0; i < PL_known_layers->cur; i++) {
633 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38 634 if (memEQ(f->name, name, len)) {
fe5a182c 635 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH		 636 return f;
637 }
638 }
3a1ee7e8
NIS		 639 if (load && PL_subname && PL_def_layerlist
640 && PL_def_layerlist->cur >= 2) {
14a5cf38
JH		 641 SV *pkgsv = newSVpvn("PerlIO", 6);
642 SV *layer = newSVpvn(name, len);
643 ENTER;
644 /*
71200d45 645 * The two SVs are magically freed by load_module
14a5cf38
JH		 646 */
647 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
648 LEAVE;
649 return PerlIO_find_layer(aTHX_ name, len, 0);
650 }
651 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
652 return NULL;
f3862f8b
NIS		 653}
654
2a1bc955 655#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 656
657static int
658perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
659{
14a5cf38
JH		 660 if (SvROK(sv)) {
661 IO *io = GvIOn((GV *) SvRV(sv));
662 PerlIO *ifp = IoIFP(io);
663 PerlIO *ofp = IoOFP(io);
664 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
665 }
666 return 0;
b13b2135
NIS		 667}
668
669static int
670perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
671{
14a5cf38
JH		 672 if (SvROK(sv)) {
673 IO *io = GvIOn((GV *) SvRV(sv));
674 PerlIO *ifp = IoIFP(io);
675 PerlIO *ofp = IoOFP(io);
676 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
677 }
678 return 0;
b13b2135
NIS		 679}
680
681static int
682perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
683{
14a5cf38
JH		 684 Perl_warn(aTHX_ "clear %" SVf, sv);
685 return 0;
b13b2135
NIS		 686}
687
688static int
689perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
690{
14a5cf38
JH		 691 Perl_warn(aTHX_ "free %" SVf, sv);
692 return 0;
b13b2135
NIS		 693}
694
695MGVTBL perlio_vtab = {
14a5cf38
JH		 696 perlio_mg_get,
697 perlio_mg_set,
698 NULL, /* len */
699 perlio_mg_clear,
700 perlio_mg_free
b13b2135
NIS		 701};
702
703XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
704{
14a5cf38
JH		 705 dXSARGS;
706 SV *sv = SvRV(ST(1));
707 AV *av = newAV();
708 MAGIC *mg;
709 int count = 0;
710 int i;
711 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
712 SvRMAGICAL_off(sv);
713 mg = mg_find(sv, PERL_MAGIC_ext);
714 mg->mg_virtual = &perlio_vtab;
715 mg_magical(sv);
716 Perl_warn(aTHX_ "attrib %" SVf, sv);
717 for (i = 2; i < items; i++) {
718 STRLEN len;
719 const char *name = SvPV(ST(i), len);
720 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
721 if (layer) {
722 av_push(av, SvREFCNT_inc(layer));
723 }
724 else {
725 ST(count) = ST(i);
726 count++;
727 }
728 }
729 SvREFCNT_dec(av);
730 XSRETURN(count);
731}
732
733#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 734
e3f3bf95
NIS		 735SV *
736PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 737{
14a5cf38
JH		 738 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
739 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
740 return sv;
e3f3bf95
NIS		 741}
742
0c4f7ff0
NIS		 743XS(XS_PerlIO__Layer__find)
744{
14a5cf38
JH		 745 dXSARGS;
746 if (items < 2)
747 Perl_croak(aTHX_ "Usage class->find(name[,load])");
748 else {
749 STRLEN len = 0;
750 char *name = SvPV(ST(1), len);
751 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
752 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
753 ST(0) =
754 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
755 &PL_sv_undef;
756 XSRETURN(1);
757 }
0c4f7ff0
NIS		 758}
759
e3f3bf95
NIS		 760void
761PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
762{
3a1ee7e8
NIS		 763 if (!PL_known_layers)
764 PL_known_layers = PerlIO_list_alloc(aTHX);
765 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 766 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS		 767}
768
1141d9f8 769int
fcf2db38 770PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 771{
14a5cf38
JH		 772 if (names) {
773 const char *s = names;
774 while (*s) {
775 while (isSPACE(*s) || *s == ':')
776 s++;
777 if (*s) {
778 STRLEN llen = 0;
779 const char *e = s;
780 const char *as = Nullch;
781 STRLEN alen = 0;
782 if (!isIDFIRST(*s)) {
783 /*
784 * Message is consistent with how attribute lists are
785 * passed. Even though this means "foo : : bar" is
71200d45 786 * seen as an invalid separator character.
14a5cf38
JH		 787 */
788 char q = ((*s == '\'') ? '"' : '\'');
789 Perl_warn(aTHX_
1e616cf5
JH		 790 "perlio: invalid separator character %c%c%c in layer specification list %s",
791 q, *s, q, s);
14a5cf38
JH		 792 return -1;
793 }
794 do {
795 e++;
796 } while (isALNUM(*e));
797 llen = e - s;
798 if (*e == '(') {
799 int nesting = 1;
800 as = ++e;
801 while (nesting) {
802 switch (*e++) {
803 case ')':
804 if (--nesting == 0)
805 alen = (e - 1) - as;
806 break;
807 case '(':
808 ++nesting;
809 break;
810 case '\\':
811 /*
812 * It's a nul terminated string, not allowed
813 * to \ the terminating null. Anything other
71200d45 814 * character is passed over.
14a5cf38
JH		 815 */
816 if (*e++) {
817 break;
818 }
819 /*
71200d45 820 * Drop through
14a5cf38
JH		 821 */
822 case '\0':
823 e--;
824 Perl_warn(aTHX_
825 "perlio: argument list not closed for layer \"%.*s\"",
826 (int) (e - s), s);
827 return -1;
828 default:
829 /*
71200d45 830 * boring.
14a5cf38
JH		 831 */
832 break;
833 }
834 }
835 }
836 if (e > s) {
837 PerlIO_funcs *layer =
838 PerlIO_find_layer(aTHX_ s, llen, 1);
839 if (layer) {
3a1ee7e8 840 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 841 (as) ? newSVpvn(as,
842 alen) :
843 &PL_sv_undef);
844 }
845 else {
846 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
847 (int) llen, s);
848 return -1;
849 }
850 }
851 s = e;
852 }
853 }
854 }
855 return 0;
1141d9f8
NIS		 856}
857
dfebf958 858void
fcf2db38 859PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 860{
14a5cf38 861 PerlIO_funcs *tab = &PerlIO_perlio;
35990314 862#ifdef PERLIO_USING_CRLF
6ce75a77 863 tab = &PerlIO_crlf;
846be114 864#else
6ce75a77
JH		 865 if (PerlIO_stdio.Set_ptrcnt)
866 tab = &PerlIO_stdio;
846be114 867#endif
14a5cf38 868 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 869 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 870 &PL_sv_undef);
dfebf958
NIS		 871}
872
e3f3bf95 873SV *
14a5cf38 874PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 875{
14a5cf38 876 return av->array[n].arg;
e3f3bf95
NIS		 877}
878
f3862f8b 879PerlIO_funcs *
14a5cf38 880PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 881{
14a5cf38
JH		 882 if (n >= 0 && n < av->cur) {
883 PerlIO_debug("Layer %" IVdf " is %s\n", n,
884 av->array[n].funcs->name);
885 return av->array[n].funcs;
886 }
887 if (!def)
888 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
889 return def;
e3f3bf95
NIS		 890}
891
fcf2db38 892PerlIO_list_t *
e3f3bf95
NIS		 893PerlIO_default_layers(pTHX)
894{
3a1ee7e8 895 if (!PL_def_layerlist) {
14a5cf38
JH		 896 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
897 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 898 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 899 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 900#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 901 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 902#if 0
14a5cf38 903 osLayer = &PerlIO_win32;
0c4128ad 904#endif
2f8118af 905#endif
14a5cf38
JH		 906 PerlIO_define_layer(aTHX_ & PerlIO_raw);
907 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
908 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
909 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 910#ifdef HAS_MMAP
14a5cf38 911 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 912#endif
14a5cf38
JH		 913 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
914 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 915 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 916 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
917 &PL_sv_undef);
918 if (s) {
3a1ee7e8 919 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 920 }
921 else {
3a1ee7e8 922 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 923 }
1141d9f8 924 }
3a1ee7e8
NIS		 925 if (PL_def_layerlist->cur < 2) {
926 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 927 }
3a1ee7e8 928 return PL_def_layerlist;
e3f3bf95
NIS		 929}
930
0c4f7ff0
NIS		 931void
932Perl_boot_core_PerlIO(pTHX)
933{
934#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 935 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
936 __FILE__);
0c4f7ff0 937#endif
14a5cf38 938 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 939}
e3f3bf95
NIS		 940
941PerlIO_funcs *
942PerlIO_default_layer(pTHX_ I32 n)
943{
14a5cf38
JH		 944 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
945 if (n < 0)
946 n += av->cur;
947 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 948}
949
a999f61b
NIS		 950#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
951#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 952
953void
1141d9f8 954PerlIO_stdstreams(pTHX)
60382766 955{
a1ea730d 956 if (!PL_perlio) {
14a5cf38
JH		 957 PerlIO_allocate(aTHX);
958 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
959 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
960 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
961 }
60382766
NIS		 962}
963
964PerlIO *
14a5cf38
JH		 965PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
966{
967 PerlIOl *l = NULL;
3a1ee7e8 968 Newc('L',l,tab->size,char,PerlIOl);
53f1b6d2 969 if (l && f) {
14a5cf38
JH		 970 Zero(l, tab->size, char);
971 l->next = *f;
972 l->tab = tab;
973 *f = l;
fe5a182c
JH		 974 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
975 (mode) ? mode : "(Null)", (void*)arg);
f62ce20a 976 if ((*l->tab->Pushed) (aTHX_ f, mode, arg) != 0) {
14a5cf38
JH		 977 PerlIO_pop(aTHX_ f);
978 return NULL;
979 }
980 }
981 return f;
60382766
NIS		 982}
983
dfebf958 984IV
f62ce20a 985PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
4b803d04 986{
14a5cf38
JH		 987 PerlIO_pop(aTHX_ f);
988 if (*f) {
989 PerlIO_flush(f);
990 PerlIO_pop(aTHX_ f);
991 return 0;
992 }
993 return -1;
4b803d04
NIS		 994}
995
996IV
f62ce20a 997PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
dfebf958 998{
14a5cf38 999 /*
71200d45 1000 * Remove the dummy layer
14a5cf38 1001 */
14a5cf38
JH		 1002 PerlIO_pop(aTHX_ f);
1003 /*
71200d45 1004 * Pop back to bottom layer
14a5cf38
JH		 1005 */
1006 if (f && *f) {
1007 PerlIO_flush(f);
1008 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1009 if (*PerlIONext(f)) {
1010 PerlIO_pop(aTHX_ f);
1011 }
1012 else {
1013 /*
71200d45 1014 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 1015 */
1016 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1017 PerlIO_pop(aTHX_ PerlIONext(f));
1018 }
1019 break;
1020 }
1021 }
fe5a182c 1022 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
14a5cf38
JH		 1023 return 0;
1024 }
1025 return -1;
dfebf958
NIS		 1026}
1027
ac27b0f5 1028int
14a5cf38
JH		 1029PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1030 PerlIO_list_t *layers, IV n)
1031{
1032 IV max = layers->cur;
1033 int code = 0;
1034 while (n < max) {
1035 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1036 if (tab) {
1037 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1038 code = -1;
1039 break;
1040 }
1041 }
1042 n++;
1043 }
1044 return code;
e3f3bf95
NIS		 1045}
1046
1047int
ac27b0f5
NIS		 1048PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1049{
14a5cf38 1050 int code = 0;
53f1b6d2 1051 if (f && names) {
3a1ee7e8 1052 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1053 code = PerlIO_parse_layers(aTHX_ layers, names);
1054 if (code == 0) {
1055 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1056 }
3a1ee7e8 1057 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1058 }
14a5cf38 1059 return code;
ac27b0f5
NIS		 1060}
1061
f3862f8b 1062
60382766 1063/*--------------------------------------------------------------------------------------*/
14a5cf38 1064/*
71200d45 1065 * Given the abstraction above the public API functions
14a5cf38 1066 */
60382766
NIS		 1067
1068int
f5b9d040 1069PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1070{
14a5cf38 1071 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1072 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1073 (names) ? names : "(Null)");
ed53a2bb
JH		 1074 /* Can't flush if switching encodings. */
1075 if (!(names && memEQ(names, ":encoding(", 10))) {
1076 PerlIO_flush(f);
35990314 1077#ifdef PERLIO_USING_CRLF
6ce75a77 1078 if (!names && (mode & O_BINARY)) {
ed53a2bb
JH		 1079 PerlIO *top = f;
1080 while (*top) {
1081 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
1082 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1083 break;
1084 }
1085 top = PerlIONext(top);
1086 PerlIO_flush(top);
14a5cf38 1087 }
14a5cf38 1088 }
6ce75a77 1089#endif
14a5cf38
JH		 1090 }
1091 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 1092}
1093
1094#undef PerlIO__close
1095int
1096PerlIO__close(PerlIO *f)
1097{
f62ce20a 1098 dTHX;
14a5cf38 1099 if (f && *f)
f62ce20a 1100 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH		 1101 else {
1102 SETERRNO(EBADF, SS$_IVCHAN);
1103 return -1;
1104 }
76ced9ad
NIS		 1105}
1106
b931b1d9
NIS		 1107#undef PerlIO_close
1108int
1109PerlIO_close(PerlIO *f)
1110{
14a5cf38
JH		 1111 dTHX;
1112 int code = -1;
1113 if (f && *f) {
f62ce20a 1114 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH		 1115 while (*f) {
1116 PerlIO_pop(aTHX_ f);
1117 }
f6c77cf1 1118 }
14a5cf38 1119 return code;
b931b1d9
NIS		 1120}
1121
1122#undef PerlIO_fileno
1123int
1124PerlIO_fileno(PerlIO *f)
1125{
f62ce20a 1126 dTHX;
14a5cf38 1127 if (f && *f)
f62ce20a 1128 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
14a5cf38
JH		 1129 else {
1130 SETERRNO(EBADF, SS$_IVCHAN);
1131 return -1;
1132 }
b931b1d9
NIS		 1133}
1134
1141d9f8
NIS		 1135static const char *
1136PerlIO_context_layers(pTHX_ const char *mode)
1137{
14a5cf38
JH		 1138 const char *type = NULL;
1139 /*
71200d45 1140 * Need to supply default layer info from open.pm
14a5cf38
JH		 1141 */
1142 if (PL_curcop) {
1143 SV *layers = PL_curcop->cop_io;
1144 if (layers) {
1145 STRLEN len;
1146 type = SvPV(layers, len);
1147 if (type && mode[0] != 'r') {
1148 /*
71200d45 1149 * Skip to write part
14a5cf38
JH		 1150 */
1151 const char *s = strchr(type, 0);
1152 if (s && (s - type) < len) {
1153 type = s + 1;
1154 }
1155 }
1156 }
1157 }
1158 return type;
1141d9f8
NIS		 1159}
1160
fcf2db38 1161static PerlIO_funcs *
2edd7e44
NIS		 1162PerlIO_layer_from_ref(pTHX_ SV *sv)
1163{
14a5cf38 1164 /*
71200d45 1165 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1166 */
1167 if (SvTYPE(sv) < SVt_PVAV)
1168 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1169
1170 /*
71200d45 1171 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1172 */
1173 switch (SvTYPE(sv)) {
1174 case SVt_PVAV:
1175 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1176 case SVt_PVHV:
1177 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1178 case SVt_PVCV:
1179 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1180 case SVt_PVGV:
1181 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1182 }
1183 return NULL;
2edd7e44
NIS		 1184}
1185
fcf2db38 1186PerlIO_list_t *
14a5cf38
JH		 1187PerlIO_resolve_layers(pTHX_ const char *layers,
1188 const char *mode, int narg, SV **args)
1189{
1190 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1191 int incdef = 1;
a1ea730d 1192 if (!PL_perlio)
14a5cf38
JH		 1193 PerlIO_stdstreams(aTHX);
1194 if (narg) {
1195 SV *arg = *args;
1196 /*
71200d45
NIS		 1197 * If it is a reference but not an object see if we have a handler
1198 * for it
14a5cf38
JH		 1199 */
1200 if (SvROK(arg) && !sv_isobject(arg)) {
1201 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1202 if (handler) {
3a1ee7e8
NIS		 1203 def = PerlIO_list_alloc(aTHX);
1204 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1205 incdef = 0;
1206 }
1207 /*
71200d45 1208 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1209 * something sensible else we will just stringfy and open
71200d45 1210 * resulting string.
14a5cf38
JH		 1211 */
1212 }
1213 }
1214 if (!layers)
1215 layers = PerlIO_context_layers(aTHX_ mode);
1216 if (layers && *layers) {
1217 PerlIO_list_t *av;
1218 if (incdef) {
1219 IV i = def->cur;
3a1ee7e8 1220 av = PerlIO_list_alloc(aTHX);
14a5cf38 1221 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1222 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1223 def->array[i].arg);
1224 }
1225 }
1226 else {
1227 av = def;
1228 }
1229 PerlIO_parse_layers(aTHX_ av, layers);
1230 return av;
1231 }
1232 else {
1233 if (incdef)
1234 def->refcnt++;
1235 return def;
1236 }
ee518936
NIS		 1237}
1238
1239PerlIO *
14a5cf38
JH		 1240PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1241 int imode, int perm, PerlIO *f, int narg, SV **args)
1242{
1243 if (!f && narg == 1 && *args == &PL_sv_undef) {
1244 if ((f = PerlIO_tmpfile())) {
1245 if (!layers)
1246 layers = PerlIO_context_layers(aTHX_ mode);
1247 if (layers && *layers)
1248 PerlIO_apply_layers(aTHX_ f, mode, layers);
1249 }
1250 }
1251 else {
1252 PerlIO_list_t *layera = NULL;
1253 IV n;
1254 PerlIO_funcs *tab = NULL;
1255 if (f && *f) {
1256 /*
71200d45
NIS		 1257 * This is "reopen" - it is not tested as perl does not use it
1258 * yet
14a5cf38
JH		 1259 */
1260 PerlIOl *l = *f;
3a1ee7e8 1261 layera = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1262 while (l) {
1263 SV *arg =
1264 (l->tab->Getarg) ? (*l->tab->
ecdeb87c 1265 Getarg) (aTHX_ &l, NULL, 0) : &PL_sv_undef;
3a1ee7e8 1266 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1267 l = *PerlIONext(&l);
1268 }
1269 }
1270 else {
1271 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1272 }
1273 /*
71200d45 1274 * Start at "top" of layer stack
14a5cf38
JH		 1275 */
1276 n = layera->cur - 1;
1277 while (n >= 0) {
1278 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1279 if (t && t->Open) {
1280 tab = t;
1281 break;
1282 }
1283 n--;
1284 }
1285 if (tab) {
1286 /*
71200d45 1287 * Found that layer 'n' can do opens - call it
14a5cf38 1288 */
7cf31beb 1289 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1290 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1291 }
14a5cf38 1292 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH		 1293 tab->name, layers, mode, fd, imode, perm,
1294 (void*)f, narg, (void*)args);
14a5cf38
JH		 1295 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1296 f, narg, args);
1297 if (f) {
1298 if (n + 1 < layera->cur) {
1299 /*
1300 * More layers above the one that we used to open -
71200d45 1301 * apply them now
14a5cf38
JH		 1302 */
1303 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1304 != 0) {
1305 f = NULL;
1306 }
1307 }
1308 }
1309 }
3a1ee7e8 1310 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1311 }
1312 return f;
ee518936 1313}
b931b1d9
NIS		 1314
1315
9e353e3b
NIS		 1316#undef PerlIO_fdopen
1317PerlIO *
1318PerlIO_fdopen(int fd, const char *mode)
1319{
14a5cf38
JH		 1320 dTHX;
1321 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1322}
1323
6f9d8c32
NIS		 1324#undef PerlIO_open
1325PerlIO *
1326PerlIO_open(const char *path, const char *mode)
1327{
14a5cf38
JH		 1328 dTHX;
1329 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1330 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1331}
1332
9e353e3b
NIS		 1333#undef PerlIO_reopen
1334PerlIO *
1335PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1336{
14a5cf38
JH		 1337 dTHX;
1338 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1339 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1340}
1341
9e353e3b
NIS		 1342#undef PerlIO_read
1343SSize_t
1344PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1345{
f62ce20a 1346 dTHX;
14a5cf38 1347 if (f && *f)
f62ce20a 1348 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1349 else {
1350 SETERRNO(EBADF, SS$_IVCHAN);
1351 return -1;
1352 }
760ac839
LW		 1353}
1354
313ca112
NIS		 1355#undef PerlIO_unread
1356SSize_t
1357PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1358{
f62ce20a 1359 dTHX;
14a5cf38 1360 if (f && *f)
f62ce20a 1361 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1362 else {
1363 SETERRNO(EBADF, SS$_IVCHAN);
1364 return -1;
1365 }
760ac839
LW		 1366}
1367
9e353e3b
NIS		 1368#undef PerlIO_write
1369SSize_t
1370PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1371{
f62ce20a 1372 dTHX;
14a5cf38 1373 if (f && *f)
f62ce20a 1374 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
14a5cf38
JH		 1375 else {
1376 SETERRNO(EBADF, SS$_IVCHAN);
1377 return -1;
1378 }
760ac839
LW		 1379}
1380
9e353e3b 1381#undef PerlIO_seek
6f9d8c32 1382int
9e353e3b 1383PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1384{
f62ce20a 1385 dTHX;
14a5cf38 1386 if (f && *f)
f62ce20a 1387 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
14a5cf38
JH		 1388 else {
1389 SETERRNO(EBADF, SS$_IVCHAN);
1390 return -1;
1391 }
760ac839
LW		 1392}
1393
9e353e3b
NIS		 1394#undef PerlIO_tell
1395Off_t
1396PerlIO_tell(PerlIO *f)
760ac839 1397{
f62ce20a 1398 dTHX;
14a5cf38 1399 if (f && *f)
f62ce20a 1400 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
14a5cf38
JH		 1401 else {
1402 SETERRNO(EBADF, SS$_IVCHAN);
1403 return -1;
1404 }
760ac839
LW		 1405}
1406
9e353e3b 1407#undef PerlIO_flush
6f9d8c32 1408int
9e353e3b 1409PerlIO_flush(PerlIO *f)
760ac839 1410{
f62ce20a 1411 dTHX;
14a5cf38
JH		 1412 if (f) {
1413 if (*f) {
1414 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1415 if (tab && tab->Flush) {
f62ce20a 1416 return (*tab->Flush) (aTHX_ f);
14a5cf38
JH		 1417 }
1418 else {
fe5a182c 1419 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
14a5cf38
JH		 1420 SETERRNO(EBADF, SS$_IVCHAN);
1421 return -1;
1422 }
1423 }
1424 else {
fe5a182c 1425 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
14a5cf38
JH		 1426 SETERRNO(EBADF, SS$_IVCHAN);
1427 return -1;
1428 }
1429 }
1430 else {
1431 /*
1432 * Is it good API design to do flush-all on NULL, a potentially
1433 * errorneous input? Maybe some magical value (PerlIO*
1434 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1435 * things on fflush(NULL), but should we be bound by their design
71200d45 1436 * decisions? --jhi
14a5cf38 1437 */
a1ea730d 1438 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1439 int code = 0;
1440 while ((f = *table)) {
1441 int i;
1442 table = (PerlIO **) (f++);
1443 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1444 if (*f && PerlIO_flush(f) != 0)
1445 code = -1;
1446 f++;
1447 }
1448 }
1449 return code;
1450 }
760ac839
LW		 1451}
1452
a9c883f6 1453void
f62ce20a 1454PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1455{
a1ea730d 1456 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1457 PerlIO *f;
1458 while ((f = *table)) {
1459 int i;
1460 table = (PerlIO **) (f++);
1461 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1462 if (*f
1463 && (PerlIOBase(f)->
1464 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1465 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1466 PerlIO_flush(f);
1467 f++;
1468 }
a9c883f6 1469 }
a9c883f6
NIS		 1470}
1471
06da4f11
NIS		 1472#undef PerlIO_fill
1473int
1474PerlIO_fill(PerlIO *f)
1475{
f62ce20a 1476 dTHX;
14a5cf38 1477 if (f && *f)
f62ce20a 1478 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
14a5cf38
JH		 1479 else {
1480 SETERRNO(EBADF, SS$_IVCHAN);
1481 return -1;
1482 }
06da4f11
NIS		 1483}
1484
f3862f8b
NIS		 1485#undef PerlIO_isutf8
1486int
1487PerlIO_isutf8(PerlIO *f)
1488{
14a5cf38
JH		 1489 if (f && *f)
1490 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1491 else {
1492 SETERRNO(EBADF, SS$_IVCHAN);
1493 return -1;
1494 }
f3862f8b
NIS		 1495}
1496
9e353e3b 1497#undef PerlIO_eof
6f9d8c32 1498int
9e353e3b 1499PerlIO_eof(PerlIO *f)
760ac839 1500{
f62ce20a 1501 dTHX;
14a5cf38 1502 if (f && *f)
f62ce20a 1503 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
14a5cf38
JH		 1504 else {
1505 SETERRNO(EBADF, SS$_IVCHAN);
1506 return -1;
1507 }
9e353e3b
NIS		 1508}
1509
1510#undef PerlIO_error
1511int
1512PerlIO_error(PerlIO *f)
1513{
f62ce20a 1514 dTHX;
14a5cf38 1515 if (f && *f)
f62ce20a 1516 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
14a5cf38
JH		 1517 else {
1518 SETERRNO(EBADF, SS$_IVCHAN);
1519 return -1;
1520 }
9e353e3b
NIS		 1521}
1522
1523#undef PerlIO_clearerr
1524void
1525PerlIO_clearerr(PerlIO *f)
1526{
f62ce20a 1527 dTHX;
14a5cf38 1528 if (f && *f)
f62ce20a 1529 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
14a5cf38
JH		 1530 else
1531 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1532}
1533
1534#undef PerlIO_setlinebuf
1535void
1536PerlIO_setlinebuf(PerlIO *f)
1537{
f62ce20a 1538 dTHX;
14a5cf38 1539 if (f && *f)
f62ce20a 1540 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
14a5cf38
JH		 1541 else
1542 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1543}
1544
1545#undef PerlIO_has_base
1546int
1547PerlIO_has_base(PerlIO *f)
1548{
14a5cf38
JH		 1549 if (f && *f) {
1550 return (PerlIOBase(f)->tab->Get_base != NULL);
1551 }
1552 return 0;
760ac839
LW		 1553}
1554
9e353e3b
NIS		 1555#undef PerlIO_fast_gets
1556int
1557PerlIO_fast_gets(PerlIO *f)
760ac839 1558{
14a5cf38
JH		 1559 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1560 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1561 return (tab->Set_ptrcnt != NULL);
1562 }
1563 return 0;
9e353e3b
NIS		 1564}
1565
1566#undef PerlIO_has_cntptr
1567int
1568PerlIO_has_cntptr(PerlIO *f)
1569{
14a5cf38
JH		 1570 if (f && *f) {
1571 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1572 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1573 }
1574 return 0;
9e353e3b
NIS		 1575}
1576
1577#undef PerlIO_canset_cnt
1578int
1579PerlIO_canset_cnt(PerlIO *f)
1580{
14a5cf38
JH		 1581 if (f && *f) {
1582 PerlIOl *l = PerlIOBase(f);
1583 return (l->tab->Set_ptrcnt != NULL);
1584 }
1585 return 0;
760ac839
LW		 1586}
1587
1588#undef PerlIO_get_base
888911fc 1589STDCHAR *
a20bf0c3 1590PerlIO_get_base(PerlIO *f)
760ac839 1591{
f62ce20a 1592 dTHX;
14a5cf38 1593 if (f && *f)
f62ce20a 1594 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
14a5cf38 1595 return NULL;
9e353e3b
NIS		 1596}
1597
1598#undef PerlIO_get_bufsiz
1599int
1600PerlIO_get_bufsiz(PerlIO *f)
1601{
f62ce20a 1602 dTHX;
14a5cf38 1603 if (f && *f)
f62ce20a 1604 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
14a5cf38 1605 return 0;
9e353e3b
NIS		 1606}
1607
1608#undef PerlIO_get_ptr
1609STDCHAR *
1610PerlIO_get_ptr(PerlIO *f)
1611{
f62ce20a 1612 dTHX;
14a5cf38
JH		 1613 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1614 if (tab->Get_ptr == NULL)
1615 return NULL;
f62ce20a 1616 return (*tab->Get_ptr) (aTHX_ f);
9e353e3b
NIS		 1617}
1618
1619#undef PerlIO_get_cnt
05d1247b 1620int
9e353e3b
NIS		 1621PerlIO_get_cnt(PerlIO *f)
1622{
f62ce20a 1623 dTHX;
14a5cf38
JH		 1624 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1625 if (tab->Get_cnt == NULL)
1626 return 0;
f62ce20a 1627 return (*tab->Get_cnt) (aTHX_ f);
9e353e3b
NIS		 1628}
1629
1630#undef PerlIO_set_cnt
1631void
14a5cf38 1632PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1633{
f62ce20a
NIS		 1634 dTHX;
1635 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
9e353e3b
NIS		 1636}
1637
1638#undef PerlIO_set_ptrcnt
1639void
14a5cf38 1640PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1641{
f62ce20a 1642 dTHX;
14a5cf38
JH		 1643 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1644 if (tab->Set_ptrcnt == NULL) {
14a5cf38
JH		 1645 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1646 }
f62ce20a 1647 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
9e353e3b
NIS		 1648}
1649
1650/*--------------------------------------------------------------------------------------*/
14a5cf38 1651/*
71200d45 1652 * utf8 and raw dummy layers
14a5cf38 1653 */
dfebf958 1654
26fb694e 1655IV
f62ce20a 1656PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
26fb694e 1657{
14a5cf38 1658 if (PerlIONext(f)) {
14a5cf38
JH		 1659 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1660 PerlIO_pop(aTHX_ f);
1661 if (tab->kind & PERLIO_K_UTF8)
1662 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1663 else
1664 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1665 return 0;
1666 }
1667 return -1;
26fb694e
NIS		 1668}
1669
dfebf958 1670PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1671 "utf8",
1672 sizeof(PerlIOl),
1673 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1674 PerlIOUtf8_pushed,
1675 NULL,
1676 NULL,
1677 NULL,
1678 NULL,
1679 NULL,
1680 NULL,
1681 NULL,
1682 NULL,
1683 NULL,
1684 NULL,
1685 NULL, /* flush */
1686 NULL, /* fill */
1687 NULL,
1688 NULL,
1689 NULL,
1690 NULL,
1691 NULL, /* get_base */
1692 NULL, /* get_bufsiz */
1693 NULL, /* get_ptr */
1694 NULL, /* get_cnt */
1695 NULL, /* set_ptrcnt */
26fb694e
NIS		 1696};
1697
1698PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1699 "bytes",
1700 sizeof(PerlIOl),
1701 PERLIO_K_DUMMY,
1702 PerlIOUtf8_pushed,
1703 NULL,
1704 NULL,
1705 NULL,
1706 NULL,
1707 NULL,
1708 NULL,
1709 NULL,
1710 NULL,
1711 NULL,
1712 NULL,
1713 NULL, /* flush */
1714 NULL, /* fill */
1715 NULL,
1716 NULL,
1717 NULL,
1718 NULL,
1719 NULL, /* get_base */
1720 NULL, /* get_bufsiz */
1721 NULL, /* get_ptr */
1722 NULL, /* get_cnt */
1723 NULL, /* set_ptrcnt */
dfebf958
NIS		 1724};
1725
1726PerlIO *
14a5cf38
JH		 1727PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1728 IV n, const char *mode, int fd, int imode, int perm,
1729 PerlIO *old, int narg, SV **args)
dfebf958 1730{
14a5cf38
JH		 1731 PerlIO_funcs *tab = PerlIO_default_btm();
1732 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1733 old, narg, args);
dfebf958
NIS		 1734}
1735
1736PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1737 "raw",
1738 sizeof(PerlIOl),
1739 PERLIO_K_DUMMY,
1740 PerlIORaw_pushed,
1741 PerlIOBase_popped,
1742 PerlIORaw_open,
1743 NULL,
1744 NULL,
1745 NULL,
1746 NULL,
1747 NULL,
1748 NULL,
1749 NULL,
1750 NULL,
1751 NULL, /* flush */
1752 NULL, /* fill */
1753 NULL,
1754 NULL,
1755 NULL,
1756 NULL,
1757 NULL, /* get_base */
1758 NULL, /* get_bufsiz */
1759 NULL, /* get_ptr */
1760 NULL, /* get_cnt */
1761 NULL, /* set_ptrcnt */
dfebf958
NIS		 1762};
1763/*--------------------------------------------------------------------------------------*/
1764/*--------------------------------------------------------------------------------------*/
14a5cf38 1765/*
71200d45 1766 * "Methods" of the "base class"
14a5cf38 1767 */
9e353e3b
NIS		 1768
1769IV
f62ce20a 1770PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1771{
14a5cf38 1772 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1773}
1774
f5b9d040 1775char *
14a5cf38
JH		 1776PerlIO_modestr(PerlIO *f, char *buf)
1777{
1778 char *s = buf;
1779 IV flags = PerlIOBase(f)->flags;
1780 if (flags & PERLIO_F_APPEND) {
1781 *s++ = 'a';
1782 if (flags & PERLIO_F_CANREAD) {
1783 *s++ = '+';
1784 }
1785 }
1786 else if (flags & PERLIO_F_CANREAD) {
1787 *s++ = 'r';
1788 if (flags & PERLIO_F_CANWRITE)
1789 *s++ = '+';
1790 }
1791 else if (flags & PERLIO_F_CANWRITE) {
1792 *s++ = 'w';
1793 if (flags & PERLIO_F_CANREAD) {
1794 *s++ = '+';
1795 }
1796 }
35990314 1797#ifdef PERLIO_USING_CRLF
14a5cf38
JH		 1798 if (!(flags & PERLIO_F_CRLF))
1799 *s++ = 'b';
5f1a76d0 1800#endif
14a5cf38
JH		 1801 *s = '\0';
1802 return buf;
f5b9d040
NIS		 1803}
1804
76ced9ad 1805IV
f62ce20a 1806PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
9e353e3b 1807{
14a5cf38 1808 PerlIOl *l = PerlIOBase(f);
b7953727 1809#if 0
14a5cf38
JH		 1810 const char *omode = mode;
1811 char temp[8];
b7953727 1812#endif
14a5cf38
JH		 1813 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1814 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1815 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1816 if (tab->Set_ptrcnt != NULL)
1817 l->flags |= PERLIO_F_FASTGETS;
1818 if (mode) {
1819 if (*mode == '#' || *mode == 'I')
1820 mode++;
1821 switch (*mode++) {
1822 case 'r':
1823 l->flags |= PERLIO_F_CANREAD;
1824 break;
1825 case 'a':
1826 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1827 break;
1828 case 'w':
1829 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1830 break;
1831 default:
1832 SETERRNO(EINVAL, LIB$_INVARG);
1833 return -1;
1834 }
1835 while (*mode) {
1836 switch (*mode++) {
1837 case '+':
1838 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1839 break;
1840 case 'b':
1841 l->flags &= ~PERLIO_F_CRLF;
1842 break;
1843 case 't':
1844 l->flags |= PERLIO_F_CRLF;
1845 break;
1846 default:
1847 SETERRNO(EINVAL, LIB$_INVARG);
1848 return -1;
1849 }
1850 }
1851 }
1852 else {
1853 if (l->next) {
1854 l->flags |= l->next->flags &
1855 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1856 PERLIO_F_APPEND);
1857 }
1858 }
5e2ab84b 1859#if 0
14a5cf38
JH		 1860 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1861 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1862 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1863#endif
14a5cf38 1864 return 0;
76ced9ad
NIS		 1865}
1866
1867IV
f62ce20a 1868PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 1869{
14a5cf38 1870 return 0;
760ac839
LW		 1871}
1872
9e353e3b 1873SSize_t
f62ce20a 1874PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 1875{
14a5cf38 1876 /*
71200d45 1877 * Save the position as current head considers it
14a5cf38
JH		 1878 */
1879 Off_t old = PerlIO_tell(f);
1880 SSize_t done;
1881 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1882 PerlIOSelf(f, PerlIOBuf)->posn = old;
f62ce20a 1883 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38 1884 return done;
9e353e3b
NIS		 1885}
1886
f6c77cf1 1887SSize_t
f62ce20a 1888PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 1889{
14a5cf38
JH		 1890 STDCHAR *buf = (STDCHAR *) vbuf;
1891 if (f) {
1892 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1893 return 0;
1894 while (count > 0) {
1895 SSize_t avail = PerlIO_get_cnt(f);
1896 SSize_t take = 0;
1897 if (avail > 0)
1898 take = (count < avail) ? count : avail;
1899 if (take > 0) {
1900 STDCHAR *ptr = PerlIO_get_ptr(f);
1901 Copy(ptr, buf, take, STDCHAR);
1902 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1903 count -= take;
1904 buf += take;
1905 }
1906 if (count > 0 && avail <= 0) {
1907 if (PerlIO_fill(f) != 0)
1908 break;
1909 }
1910 }
1911 return (buf - (STDCHAR *) vbuf);
1912 }
f6c77cf1 1913 return 0;
f6c77cf1
NIS		 1914}
1915
9e353e3b 1916IV
f62ce20a 1917PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 1918{
14a5cf38 1919 return 0;
9e353e3b
NIS		 1920}
1921
1922IV
f62ce20a 1923PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 1924{
14a5cf38 1925 return -1;
06da4f11
NIS		 1926}
1927
1928IV
f62ce20a 1929PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 1930{
14a5cf38
JH		 1931 IV code = 0;
1932 PerlIO *n = PerlIONext(f);
1933 if (PerlIO_flush(f) != 0)
1934 code = -1;
f62ce20a 1935 if (n && *n && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
14a5cf38
JH		 1936 code = -1;
1937 PerlIOBase(f)->flags &=
1938 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1939 return code;
9e353e3b
NIS		 1940}
1941
1942IV
f62ce20a 1943PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 1944{
14a5cf38
JH		 1945 if (f && *f) {
1946 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1947 }
1948 return 1;
9e353e3b
NIS		 1949}
1950
1951IV
f62ce20a 1952PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 1953{
14a5cf38
JH		 1954 if (f && *f) {
1955 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1956 }
1957 return 1;
9e353e3b
NIS		 1958}
1959
1960void
f62ce20a 1961PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 1962{
14a5cf38
JH		 1963 if (f && *f) {
1964 PerlIO *n = PerlIONext(f);
1965 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1966 if (n)
1967 PerlIO_clearerr(n);
1968 }
9e353e3b
NIS		 1969}
1970
1971void
f62ce20a 1972PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1973{
14a5cf38
JH		 1974 if (f) {
1975 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1976 }
9e353e3b
NIS		 1977}
1978
93a8090d
NIS		 1979SV *
1980PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1981{
1982 if (!arg)
1983 return Nullsv;
1984#ifdef sv_dup
1985 if (param) {
1986 return sv_dup(arg, param);
1987 }
1988 else {
1989 return newSVsv(arg);
1990 }
1991#else
1992 return newSVsv(arg);
1993#endif
1994}
1995
1996PerlIO *
ecdeb87c 1997PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d
NIS		 1998{
1999 PerlIO *nexto = PerlIONext(o);
2000 if (*nexto) {
2001 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
ecdeb87c 2002 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
93a8090d
NIS		 2003 }
2004 if (f) {
2005 PerlIO_funcs *self = PerlIOBase(o)->tab;
2006 SV *arg = Nullsv;
2007 char buf[8];
fe5a182c
JH		 2008 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2009 self->name, (void*)f, (void*)o, (void*)param);
93a8090d 2010 if (self->Getarg) {
ecdeb87c 2011 arg = (*self->Getarg)(aTHX_ o,param,flags);
93a8090d
NIS		 2012 }
2013 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2014 if (arg) {
93a8090d
NIS		 2015 SvREFCNT_dec(arg);
2016 }
2017 }
2018 return f;
2019}
2020
2021#define PERLIO_MAX_REFCOUNTABLE_FD 2048
168d5872 2022#ifdef USE_THREADS
93a8090d 2023perl_mutex PerlIO_mutex;
93a8090d 2024#endif
168d5872 2025int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
93a8090d
NIS		 2026
2027void
2028PerlIO_init(pTHX)
2029{
2030 /* Place holder for stdstreams call ??? */
168d5872 2031#ifdef USE_THREADS
93a8090d
NIS		 2032 MUTEX_INIT(&PerlIO_mutex);
2033#endif
2034}
2035
168d5872
NIS		 2036void
2037PerlIOUnix_refcnt_inc(int fd)
2038{
2039 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2040#ifdef USE_THREADS
2041 MUTEX_LOCK(&PerlIO_mutex);
2042#endif
2043 PerlIO_fd_refcnt[fd]++;
2044 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2045#ifdef USE_THREADS
2046 MUTEX_UNLOCK(&PerlIO_mutex);
2047#endif
2048 }
2049}
2050
168d5872
NIS		 2051int
2052PerlIOUnix_refcnt_dec(int fd)
2053{
2054 int cnt = 0;
2055 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2056#ifdef USE_THREADS
2057 MUTEX_LOCK(&PerlIO_mutex);
2058#endif
2059 cnt = --PerlIO_fd_refcnt[fd];
2060 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2061#ifdef USE_THREADS
2062 MUTEX_UNLOCK(&PerlIO_mutex);
2063#endif
2064 }
2065 return cnt;
2066}
2067
694c95cf
JH		 2068void
2069PerlIO_cleanup(pTHX)
2070{
2071 int i;
2072#ifdef USE_ITHREADS
2073 PerlIO_debug("Cleanup %p\n",aTHX);
2074#endif
2075 /* Raise STDIN..STDERR refcount so we don't close them */
2076 for (i=0; i < 3; i++)
2077 PerlIOUnix_refcnt_inc(i);
2078 PerlIO_cleantable(aTHX_ &PL_perlio);
2079 /* Restore STDIN..STDERR refcount */
2080 for (i=0; i < 3; i++)
2081 PerlIOUnix_refcnt_dec(i);
2082}
2083
2084
2085
9e353e3b 2086/*--------------------------------------------------------------------------------------*/
14a5cf38 2087/*
71200d45 2088 * Bottom-most level for UNIX-like case
14a5cf38 2089 */
9e353e3b 2090
14a5cf38
JH		 2091typedef struct {
2092 struct _PerlIO base; /* The generic part */
2093 int fd; /* UNIX like file descriptor */
2094 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2095} PerlIOUnix;
2096
6f9d8c32 2097int
9e353e3b 2098PerlIOUnix_oflags(const char *mode)
760ac839 2099{
14a5cf38
JH		 2100 int oflags = -1;
2101 if (*mode == 'I' || *mode == '#')
2102 mode++;
2103 switch (*mode) {
2104 case 'r':
2105 oflags = O_RDONLY;
2106 if (*++mode == '+') {
2107 oflags = O_RDWR;
2108 mode++;
2109 }
2110 break;
2111
2112 case 'w':
2113 oflags = O_CREAT | O_TRUNC;
2114 if (*++mode == '+') {
2115 oflags |= O_RDWR;
2116 mode++;
2117 }
2118 else
2119 oflags |= O_WRONLY;
2120 break;
2121
2122 case 'a':
2123 oflags = O_CREAT | O_APPEND;
2124 if (*++mode == '+') {
2125 oflags |= O_RDWR;
2126 mode++;
2127 }
2128 else
2129 oflags |= O_WRONLY;
2130 break;
2131 }
2132 if (*mode == 'b') {
2133 oflags |= O_BINARY;
2134 oflags &= ~O_TEXT;
2135 mode++;
2136 }
2137 else if (*mode == 't') {
2138 oflags |= O_TEXT;
2139 oflags &= ~O_BINARY;
2140 mode++;
2141 }
2142 /*
71200d45 2143 * Always open in binary mode
14a5cf38
JH		 2144 */
2145 oflags |= O_BINARY;
2146 if (*mode || oflags == -1) {
2147 SETERRNO(EINVAL, LIB$_INVARG);
2148 oflags = -1;
2149 }
2150 return oflags;
9e353e3b
NIS		 2151}
2152
2153IV
f62ce20a 2154PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2155{
14a5cf38 2156 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2157}
2158
4b803d04 2159IV
f62ce20a 2160PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
4b803d04 2161{
f62ce20a 2162 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
93a8090d 2163 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2164 if (*PerlIONext(f)) {
14a5cf38
JH		 2165 s->fd = PerlIO_fileno(PerlIONext(f));
2166 /*
71200d45 2167 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2168 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2169 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2170 */
2171 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2172 }
2173 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2174 return code;
4b803d04
NIS		 2175}
2176
9e353e3b 2177PerlIO *
14a5cf38
JH		 2178PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2179 IV n, const char *mode, int fd, int imode,
2180 int perm, PerlIO *f, int narg, SV **args)
2181{
2182 if (f) {
2183 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2184 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH		 2185 }
2186 if (narg > 0) {
2187 char *path = SvPV_nolen(*args);
2188 if (*mode == '#')
2189 mode++;
2190 else {
2191 imode = PerlIOUnix_oflags(mode);
2192 perm = 0666;
2193 }
2194 if (imode != -1) {
2195 fd = PerlLIO_open3(path, imode, perm);
2196 }
2197 }
2198 if (fd >= 0) {
2199 PerlIOUnix *s;
2200 if (*mode == 'I')
2201 mode++;
2202 if (!f) {
2203 f = PerlIO_allocate(aTHX);
2204 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2205 PerlIOUnix);
2206 }
2207 else
2208 s = PerlIOSelf(f, PerlIOUnix);
2209 s->fd = fd;
2210 s->oflags = imode;
2211 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
93a8090d 2212 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH		 2213 return f;
2214 }
2215 else {
2216 if (f) {
2217 /*
71200d45 2218 * FIXME: pop layers ???
14a5cf38
JH		 2219 */
2220 }
2221 return NULL;
2222 }
9e353e3b
NIS		 2223}
2224
71200d45 2225PerlIO *
ecdeb87c 2226PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS		 2227{
2228 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2229 int fd = os->fd;
ecdeb87c
NIS		 2230 if (flags & PERLIO_DUP_FD) {
2231 fd = PerlLIO_dup(fd);
2232 }
93a8090d 2233 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2234 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 2235 if (f) {
2236 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2237 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2238 s->fd = fd;
93a8090d 2239 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS		 2240 return f;
2241 }
71200d45
NIS		 2242 }
2243 return NULL;
2244}
2245
2246
9e353e3b 2247SSize_t
f62ce20a 2248PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2249{
14a5cf38
JH		 2250 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2251 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2252 return 0;
2253 while (1) {
2254 SSize_t len = PerlLIO_read(fd, vbuf, count);
2255 if (len >= 0 || errno != EINTR) {
2256 if (len < 0)
2257 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2258 else if (len == 0 && count != 0)
2259 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2260 return len;
2261 }
2262 PERL_ASYNC_CHECK();
2263 }
9e353e3b
NIS		 2264}
2265
2266SSize_t
f62ce20a 2267PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2268{
14a5cf38
JH		 2269 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2270 while (1) {
2271 SSize_t len = PerlLIO_write(fd, vbuf, count);
2272 if (len >= 0 || errno != EINTR) {
2273 if (len < 0)
2274 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2275 return len;
2276 }
2277 PERL_ASYNC_CHECK();
06da4f11 2278 }
9e353e3b
NIS		 2279}
2280
2281IV
f62ce20a 2282PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2283{
14a5cf38
JH		 2284 Off_t new =
2285 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2286 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2287 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2288}
2289
2290Off_t
f62ce20a 2291PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2292{
14a5cf38 2293 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2294}
2295
71200d45 2296
9e353e3b 2297IV
f62ce20a 2298PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2299{
14a5cf38
JH		 2300 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2301 int code = 0;
168d5872
NIS		 2302 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2303 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS		 2304 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2305 return 0;
2306 }
93a8090d
NIS		 2307 }
2308 else {
2309 SETERRNO(EBADF,SS$_IVCHAN);
2310 return -1;
2311 }
14a5cf38
JH		 2312 while (PerlLIO_close(fd) != 0) {
2313 if (errno != EINTR) {
2314 code = -1;
2315 break;
2316 }
2317 PERL_ASYNC_CHECK();
2318 }
2319 if (code == 0) {
2320 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2321 }
2322 return code;
9e353e3b
NIS		 2323}
2324
2325PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2326 "unix",
2327 sizeof(PerlIOUnix),
2328 PERLIO_K_RAW,
2329 PerlIOUnix_pushed,
2330 PerlIOBase_noop_ok,
2331 PerlIOUnix_open,
2332 NULL,
2333 PerlIOUnix_fileno,
71200d45 2334 PerlIOUnix_dup,
14a5cf38
JH		 2335 PerlIOUnix_read,
2336 PerlIOBase_unread,
2337 PerlIOUnix_write,
2338 PerlIOUnix_seek,
2339 PerlIOUnix_tell,
2340 PerlIOUnix_close,
2341 PerlIOBase_noop_ok, /* flush */
2342 PerlIOBase_noop_fail, /* fill */
2343 PerlIOBase_eof,
2344 PerlIOBase_error,
2345 PerlIOBase_clearerr,
2346 PerlIOBase_setlinebuf,
2347 NULL, /* get_base */
2348 NULL, /* get_bufsiz */
2349 NULL, /* get_ptr */
2350 NULL, /* get_cnt */
2351 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2352};
2353
2354/*--------------------------------------------------------------------------------------*/
14a5cf38 2355/*
71200d45 2356 * stdio as a layer
14a5cf38 2357 */
9e353e3b 2358
14a5cf38
JH		 2359typedef struct {
2360 struct _PerlIO base;
2361 FILE *stdio; /* The stream */
9e353e3b
NIS		 2362} PerlIOStdio;
2363
2364IV
f62ce20a 2365PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2366{
14a5cf38 2367 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2368}
2369
766a733e 2370char *
14a5cf38
JH		 2371PerlIOStdio_mode(const char *mode, char *tmode)
2372{
2373 char *ret = tmode;
2374 while (*mode) {
2375 *tmode++ = *mode++;
2376 }
35990314 2377#ifdef PERLIO_USING_CRLF
6ce75a77
JH		 2378 *tmode++ = 'b';
2379#endif
14a5cf38
JH		 2380 *tmode = '\0';
2381 return ret;
2382}
2383
2384/*
71200d45 2385 * This isn't used yet ...
14a5cf38 2386 */
4b803d04 2387IV
f62ce20a 2388PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
4b803d04 2389{
14a5cf38 2390 if (*PerlIONext(f)) {
14a5cf38
JH		 2391 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2392 char tmode[8];
2393 FILE *stdio =
2394 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2395 PerlIOStdio_mode(mode, tmode));
2396 if (stdio)
2397 s->stdio = stdio;
2398 else
2399 return -1;
2400 }
f62ce20a 2401 return PerlIOBase_pushed(aTHX_ f, mode, arg);
4b803d04
NIS		 2402}
2403
9e353e3b
NIS		 2404#undef PerlIO_importFILE
2405PerlIO *
2406PerlIO_importFILE(FILE *stdio, int fl)
2407{
14a5cf38
JH		 2408 dTHX;
2409 PerlIO *f = NULL;
2410 if (stdio) {
2411 PerlIOStdio *s =
2412 PerlIOSelf(PerlIO_push
2413 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2414 "r+", Nullsv), PerlIOStdio);
2415 s->stdio = stdio;
2416 }
2417 return f;
9e353e3b
NIS		 2418}
2419
2420PerlIO *
14a5cf38
JH		 2421PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2422 IV n, const char *mode, int fd, int imode,
2423 int perm, PerlIO *f, int narg, SV **args)
2424{
2425 char tmode[8];
2426 if (f) {
2427 char *path = SvPV_nolen(*args);
2428 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS		 2429 FILE *stdio;
2430 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2431 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH		 2432 s->stdio);
2433 if (!s->stdio)
2434 return NULL;
2435 s->stdio = stdio;
1751d015 2436 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2437 return f;
2438 }
2439 else {
2440 if (narg > 0) {
2441 char *path = SvPV_nolen(*args);
2442 if (*mode == '#') {
2443 mode++;
2444 fd = PerlLIO_open3(path, imode, perm);
2445 }
2446 else {
2447 FILE *stdio = PerlSIO_fopen(path, mode);
2448 if (stdio) {
2449 PerlIOStdio *s =
2450 PerlIOSelf(PerlIO_push
2451 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2452 (mode = PerlIOStdio_mode(mode, tmode)),
2453 PerlIOArg),
2454 PerlIOStdio);
2455 s->stdio = stdio;
1751d015 2456 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2457 }
2458 return f;
2459 }
2460 }
2461 if (fd >= 0) {
2462 FILE *stdio = NULL;
2463 int init = 0;
2464 if (*mode == 'I') {
2465 init = 1;
2466 mode++;
2467 }
2468 if (init) {
2469 switch (fd) {
2470 case 0:
2471 stdio = PerlSIO_stdin;
2472 break;
2473 case 1:
2474 stdio = PerlSIO_stdout;
2475 break;
2476 case 2:
2477 stdio = PerlSIO_stderr;
2478 break;
2479 }
2480 }
2481 else {
2482 stdio = PerlSIO_fdopen(fd, mode =
2483 PerlIOStdio_mode(mode, tmode));
2484 }
2485 if (stdio) {
2486 PerlIOStdio *s =
2487 PerlIOSelf(PerlIO_push
2488 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2489 mode, PerlIOArg), PerlIOStdio);
2490 s->stdio = stdio;
1751d015 2491 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2492 return f;
2493 }
2494 }
2495 }
ee518936 2496 return NULL;
9e353e3b
NIS		 2497}
2498
1751d015 2499PerlIO *
ecdeb87c 2500PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS		 2501{
2502 /* This assumes no layers underneath - which is what
2503 happens, but is not how I remember it. NI-S 2001/10/16
2504 */
ecdeb87c 2505 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2506 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
ecdeb87c
NIS		 2507 if (flags & PERLIO_DUP_FD) {
2508 int fd = PerlLIO_dup(fileno(stdio));
2509 if (fd >= 0) {
2510 char mode[8];
293ed4d2 2511 stdio = fdopen(fd, PerlIO_modestr(o,mode));
ecdeb87c
NIS		 2512 }
2513 else {
2514 /* FIXME: To avoid messy error recovery if dup fails
2515 re-use the existing stdio as though flag was not set
2516 */
2517 }
2518 }
694c95cf
JH		 2519 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2520 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS		 2521 }
2522 return f;
2523}
2524
2525IV
f62ce20a 2526PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2527{
1751d015
NIS		 2528#ifdef SOCKS5_VERSION_NAME
2529 int optval;
2530 Sock_size_t optlen = sizeof(int);
2531#endif
2532 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2533 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
694c95cf
JH		 2534 /* Do not close it but do flush any buffers */
2535 PerlIO_flush(f);
1751d015
NIS		 2536 return 0;
2537 }
2538 return (
2539#ifdef SOCKS5_VERSION_NAME
2540 (getsockopt
2541 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2542 &optlen) <
2543 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2544#else
2545 PerlSIO_fclose(stdio)
2546#endif
2547 );
2548
2549}
2550
2551
2552
9e353e3b 2553SSize_t
f62ce20a 2554PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2555{
14a5cf38
JH		 2556 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2557 SSize_t got = 0;
2558 if (count == 1) {
2559 STDCHAR *buf = (STDCHAR *) vbuf;
2560 /*
2561 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2562 * stdio does not do that for fread()
14a5cf38
JH		 2563 */
2564 int ch = PerlSIO_fgetc(s);
2565 if (ch != EOF) {
2566 *buf = ch;
2567 got = 1;
2568 }
2569 }
2570 else
2571 got = PerlSIO_fread(vbuf, 1, count, s);
2572 return got;
9e353e3b
NIS		 2573}
2574
2575SSize_t
f62ce20a 2576PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2577{
14a5cf38
JH		 2578 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2579 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2580 SSize_t unread = 0;
2581 while (count > 0) {
2582 int ch = *buf-- & 0xff;
2583 if (PerlSIO_ungetc(ch, s) != ch)
2584 break;
2585 unread++;
2586 count--;
2587 }
2588 return unread;
9e353e3b
NIS		 2589}
2590
2591SSize_t
f62ce20a 2592PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2593{
14a5cf38
JH		 2594 return PerlSIO_fwrite(vbuf, 1, count,
2595 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2596}
2597
2598IV
f62ce20a 2599PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2600{
14a5cf38
JH		 2601 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2602 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2603}
2604
2605Off_t
f62ce20a 2606PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 2607{
14a5cf38
JH		 2608 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2609 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2610}
2611
2612IV
f62ce20a 2613PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 2614{
14a5cf38
JH		 2615 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2616 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2617 return PerlSIO_fflush(stdio);
2618 }
2619 else {
88b61e10 2620#if 0
14a5cf38
JH		 2621 /*
2622 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2623 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2624 * design is to do _this_ but not have layer above flush this
71200d45 2625 * layer read-to-read
14a5cf38
JH		 2626 */
2627 /*
71200d45 2628 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2629 */
2630 int err = errno;
2631 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2632 errno = err;
88b61e10 2633#endif
14a5cf38
JH		 2634 }
2635 return 0;
9e353e3b
NIS		 2636}
2637
2638IV
f62ce20a 2639PerlIOStdio_fill(pTHX_ PerlIO *f)
06da4f11 2640{
14a5cf38
JH		 2641 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2642 int c;
2643 /*
71200d45 2644 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2645 */
2646 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2647 if (PerlSIO_fflush(stdio) != 0)
2648 return EOF;
2649 }
2650 c = PerlSIO_fgetc(stdio);
2651 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2652 return EOF;
2653 return 0;
06da4f11
NIS		 2654}
2655
2656IV
f62ce20a 2657PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 2658{
14a5cf38 2659 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2660}
2661
2662IV
f62ce20a 2663PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 2664{
14a5cf38 2665 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2666}
2667
2668void
f62ce20a 2669PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 2670{
14a5cf38 2671 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2672}
2673
2674void
f62ce20a 2675PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS		 2676{
2677#ifdef HAS_SETLINEBUF
14a5cf38 2678 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2679#else
14a5cf38 2680 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2681#endif
2682}
2683
2684#ifdef FILE_base
2685STDCHAR *
f62ce20a 2686PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 2687{
14a5cf38 2688 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2689 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS		 2690}
2691
2692Size_t
f62ce20a 2693PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 2694{
14a5cf38
JH		 2695 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2696 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2697}
2698#endif
2699
2700#ifdef USE_STDIO_PTR
2701STDCHAR *
f62ce20a 2702PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 2703{
14a5cf38 2704 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 2705 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2706}
2707
2708SSize_t
f62ce20a 2709PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 2710{
14a5cf38
JH		 2711 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2712 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2713}
2714
2715void
f62ce20a 2716PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2717{
14a5cf38 2718 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 2719 if (ptr != NULL) {
9e353e3b 2720#ifdef STDIO_PTR_LVALUE
f62ce20a 2721 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 2722#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2723 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2724 dTHX;
2725 assert(PerlSIO_get_cnt(stdio) == (cnt));
2726 }
9e353e3b
NIS		 2727#endif
2728#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2729 /*
71200d45 2730 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2731 */
2732 return;
9e353e3b 2733#endif
14a5cf38
JH		 2734#else /* STDIO_PTR_LVALUE */
2735 PerlProc_abort();
2736#endif /* STDIO_PTR_LVALUE */
2737 }
2738 /*
71200d45 2739 * Now (or only) set cnt
14a5cf38 2740 */
9e353e3b 2741#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2742 PerlSIO_set_cnt(stdio, cnt);
2743#else /* STDIO_CNT_LVALUE */
9e353e3b 2744#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2745 PerlSIO_set_ptr(stdio,
2746 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2747 cnt));
2748#else /* STDIO_PTR_LVAL_SETS_CNT */
2749 PerlProc_abort();
2750#endif /* STDIO_PTR_LVAL_SETS_CNT */
2751#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2752}
2753
2754#endif
2755
2756PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2757 "stdio",
2758 sizeof(PerlIOStdio),
2759 PERLIO_K_BUFFERED,
2760 PerlIOBase_pushed,
2761 PerlIOBase_noop_ok,
2762 PerlIOStdio_open,
2763 NULL,
2764 PerlIOStdio_fileno,
71200d45 2765 PerlIOStdio_dup,
14a5cf38
JH		 2766 PerlIOStdio_read,
2767 PerlIOStdio_unread,
2768 PerlIOStdio_write,
2769 PerlIOStdio_seek,
2770 PerlIOStdio_tell,
2771 PerlIOStdio_close,
2772 PerlIOStdio_flush,
2773 PerlIOStdio_fill,
2774 PerlIOStdio_eof,
2775 PerlIOStdio_error,
2776 PerlIOStdio_clearerr,
2777 PerlIOStdio_setlinebuf,
9e353e3b 2778#ifdef FILE_base
14a5cf38
JH		 2779 PerlIOStdio_get_base,
2780 PerlIOStdio_get_bufsiz,
9e353e3b 2781#else
14a5cf38
JH		 2782 NULL,
2783 NULL,
9e353e3b
NIS		 2784#endif
2785#ifdef USE_STDIO_PTR
14a5cf38
JH		 2786 PerlIOStdio_get_ptr,
2787 PerlIOStdio_get_cnt,
0eb1d8a4 2788#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2789 PerlIOStdio_set_ptrcnt
2790#else /* STDIO_PTR_LVALUE */
2791 NULL
2792#endif /* STDIO_PTR_LVALUE */
2793#else /* USE_STDIO_PTR */
2794 NULL,
2795 NULL,
2796 NULL
2797#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2798};
2799
2800#undef PerlIO_exportFILE
2801FILE *
2802PerlIO_exportFILE(PerlIO *f, int fl)
2803{
14a5cf38
JH		 2804 FILE *stdio;
2805 PerlIO_flush(f);
2806 stdio = fdopen(PerlIO_fileno(f), "r+");
2807 if (stdio) {
2808 dTHX;
2809 PerlIOStdio *s =
2810 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2811 PerlIOStdio);
2812 s->stdio = stdio;
2813 }
2814 return stdio;
9e353e3b
NIS		 2815}
2816
2817#undef PerlIO_findFILE
2818FILE *
2819PerlIO_findFILE(PerlIO *f)
2820{
14a5cf38
JH		 2821 PerlIOl *l = *f;
2822 while (l) {
2823 if (l->tab == &PerlIO_stdio) {
2824 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2825 return s->stdio;
2826 }
2827 l = *PerlIONext(&l);
f7e7eb72 2828 }
14a5cf38 2829 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2830}
2831
2832#undef PerlIO_releaseFILE
2833void
2834PerlIO_releaseFILE(PerlIO *p, FILE *f)
2835{
2836}
2837
2838/*--------------------------------------------------------------------------------------*/
14a5cf38 2839/*
71200d45 2840 * perlio buffer layer
14a5cf38 2841 */
9e353e3b 2842
5e2ab84b 2843IV
f62ce20a 2844PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2845{
14a5cf38
JH		 2846 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2847 int fd = PerlIO_fileno(f);
2848 Off_t posn;
2849 if (fd >= 0 && PerlLIO_isatty(fd)) {
2850 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2851 }
2852 posn = PerlIO_tell(PerlIONext(f));
2853 if (posn != (Off_t) - 1) {
2854 b->posn = posn;
2855 }
f62ce20a 2856 return PerlIOBase_pushed(aTHX_ f, mode, arg);
5e2ab84b
NIS		 2857}
2858
9e353e3b 2859PerlIO *
14a5cf38
JH		 2860PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2861 IV n, const char *mode, int fd, int imode, int perm,
2862 PerlIO *f, int narg, SV **args)
2863{
2864 if (f) {
2865 PerlIO *next = PerlIONext(f);
2866 PerlIO_funcs *tab =
2867 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2868 next =
2869 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2870 next, narg, args);
2871 if (!next
f62ce20a 2872 || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
14a5cf38
JH		 2873 return NULL;
2874 }
2875 }
2876 else {
2877 PerlIO_funcs *tab =
2878 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2879 int init = 0;
2880 if (*mode == 'I') {
2881 init = 1;
2882 /*
71200d45 2883 * mode++;
14a5cf38
JH		 2884 */
2885 }
2886 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2887 NULL, narg, args);
2888 if (f) {
b26b1ab5
NC		 2889 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2890 /*
2891 * if push fails during open, open fails. close will pop us.
2892 */
2893 PerlIO_close (f);
2894 return NULL;
2895 } else {
2896 fd = PerlIO_fileno(f);
35990314 2897#ifdef PERLIO_USING_CRLF
14a5cf38 2898 /*
b26b1ab5 2899 * do something about failing setmode()? --jhi
14a5cf38 2900 */
b26b1ab5
NC		 2901 PerlLIO_setmode(fd, O_BINARY);
2902#endif
2903 if (init && fd == 2) {
2904 /*
2905 * Initial stderr is unbuffered
2906 */
2907 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2908 }
14a5cf38
JH		 2909 }
2910 }
ee518936 2911 }
14a5cf38 2912 return f;
9e353e3b
NIS		 2913}
2914
14a5cf38
JH		 2915/*
2916 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2917 * read or write state
14a5cf38 2918 */
9e353e3b 2919IV
f62ce20a 2920PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 2921{
14a5cf38
JH		 2922 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2923 int code = 0;
2924 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2925 /*
71200d45 2926 * write() the buffer
14a5cf38
JH		 2927 */
2928 STDCHAR *buf = b->buf;
2929 STDCHAR *p = buf;
2930 PerlIO *n = PerlIONext(f);
2931 while (p < b->ptr) {
2932 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2933 if (count > 0) {
2934 p += count;
2935 }
2936 else if (count < 0 || PerlIO_error(n)) {
2937 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2938 code = -1;
2939 break;
2940 }
2941 }
2942 b->posn += (p - buf);
2943 }
2944 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2945 STDCHAR *buf = PerlIO_get_base(f);
2946 /*
71200d45 2947 * Note position change
14a5cf38
JH		 2948 */
2949 b->posn += (b->ptr - buf);
2950 if (b->ptr < b->end) {
2951 /*
71200d45 2952 * We did not consume all of it
14a5cf38
JH		 2953 */
2954 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2955 b->posn = PerlIO_tell(PerlIONext(f));
2956 }
2957 }
2958 }
2959 b->ptr = b->end = b->buf;
2960 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2961 /*
71200d45 2962 * FIXME: Is this right for read case ?
14a5cf38
JH		 2963 */
2964 if (PerlIO_flush(PerlIONext(f)) != 0)
2965 code = -1;
2966 return code;
6f9d8c32
NIS		 2967}
2968
06da4f11 2969IV
f62ce20a 2970PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 2971{
14a5cf38
JH		 2972 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2973 PerlIO *n = PerlIONext(f);
2974 SSize_t avail;
2975 /*
2976 * FIXME: doing the down-stream flush is a bad idea if it causes
2977 * pre-read data in stdio buffer to be discarded but this is too
2978 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2979 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2980 */
2981 if (PerlIO_flush(f) != 0)
2982 return -1;
2983 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 2984 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH		 2985
2986 if (!b->buf)
2987 PerlIO_get_base(f); /* allocate via vtable */
2988
2989 b->ptr = b->end = b->buf;
2990 if (PerlIO_fast_gets(n)) {
2991 /*
2992 * Layer below is also buffered We do _NOT_ want to call its
2993 * ->Read() because that will loop till it gets what we asked for
2994 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2995 * hand, or ask it to fill _once_.
14a5cf38
JH		 2996 */
2997 avail = PerlIO_get_cnt(n);
2998 if (avail <= 0) {
2999 avail = PerlIO_fill(n);
3000 if (avail == 0)
3001 avail = PerlIO_get_cnt(n);
3002 else {
3003 if (!PerlIO_error(n) && PerlIO_eof(n))
3004 avail = 0;
3005 }
3006 }
3007 if (avail > 0) {
3008 STDCHAR *ptr = PerlIO_get_ptr(n);
3009 SSize_t cnt = avail;
3010 if (avail > b->bufsiz)
3011 avail = b->bufsiz;
3012 Copy(ptr, b->buf, avail, STDCHAR);
3013 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3014 }
3015 }
3016 else {
3017 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3018 }
3019 if (avail <= 0) {
3020 if (avail == 0)
3021 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3022 else
3023 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3024 return -1;
3025 }
3026 b->end = b->buf + avail;
3027 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3028 return 0;
06da4f11
NIS		 3029}
3030
6f9d8c32 3031SSize_t
f62ce20a 3032PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 3033{
14a5cf38
JH		 3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3035 if (f) {
3036 if (!b->ptr)
3037 PerlIO_get_base(f);
f62ce20a 3038 return PerlIOBase_read(aTHX_ f, vbuf, count);
14a5cf38
JH		 3039 }
3040 return 0;
6f9d8c32
NIS		 3041}
3042
9e353e3b 3043SSize_t
f62ce20a 3044PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3045{
14a5cf38
JH		 3046 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3047 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3048 SSize_t unread = 0;
3049 SSize_t avail;
3050 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3051 PerlIO_flush(f);
3052 if (!b->buf)
3053 PerlIO_get_base(f);
3054 if (b->buf) {
3055 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3056 /*
3057 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3058 * which have been read back to buffer start
14a5cf38
JH		 3059 */
3060 avail = (b->ptr - b->buf);
3061 }
3062 else {
3063 /*
3064 * Buffer is idle, set it up so whole buffer is available for
71200d45 3065 * unread
14a5cf38
JH		 3066 */
3067 avail = b->bufsiz;
3068 b->end = b->buf + avail;
3069 b->ptr = b->end;
3070 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3071 /*
71200d45 3072 * Buffer extends _back_ from where we are now
14a5cf38
JH		 3073 */
3074 b->posn -= b->bufsiz;
3075 }
3076 if (avail > (SSize_t) count) {
3077 /*
71200d45 3078 * If we have space for more than count, just move count
14a5cf38
JH		 3079 */
3080 avail = count;
3081 }
3082 if (avail > 0) {
3083 b->ptr -= avail;
3084 buf -= avail;
3085 /*
3086 * In simple stdio-like ungetc() case chars will be already
71200d45 3087 * there
14a5cf38
JH		 3088 */
3089 if (buf != b->ptr) {
3090 Copy(buf, b->ptr, avail, STDCHAR);
3091 }
3092 count -= avail;
3093 unread += avail;
3094 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3095 }
3096 }
3097 return unread;
760ac839
LW		 3098}
3099
9e353e3b 3100SSize_t
f62ce20a 3101PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3102{
14a5cf38
JH		 3103 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3104 const STDCHAR *buf = (const STDCHAR *) vbuf;
3105 Size_t written = 0;
3106 if (!b->buf)
3107 PerlIO_get_base(f);
3108 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3109 return 0;
3110 while (count > 0) {
3111 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3112 if ((SSize_t) count < avail)
3113 avail = count;
3114 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3115 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3116 while (avail > 0) {
3117 int ch = *buf++;
3118 *(b->ptr)++ = ch;
3119 count--;
3120 avail--;
3121 written++;
3122 if (ch == '\n') {
3123 PerlIO_flush(f);
3124 break;
3125 }
3126 }
3127 }
3128 else {
3129 if (avail) {
3130 Copy(buf, b->ptr, avail, STDCHAR);
3131 count -= avail;
3132 buf += avail;
3133 written += avail;
3134 b->ptr += avail;
3135 }
3136 }
3137 if (b->ptr >= (b->buf + b->bufsiz))
3138 PerlIO_flush(f);
3139 }
3140 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3141 PerlIO_flush(f);
3142 return written;
9e353e3b
NIS		 3143}
3144
3145IV
f62ce20a 3146PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3147{
14a5cf38
JH		 3148 IV code;
3149 if ((code = PerlIO_flush(f)) == 0) {
3150 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3151 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3152 code = PerlIO_seek(PerlIONext(f), offset, whence);
3153 if (code == 0) {
3154 b->posn = PerlIO_tell(PerlIONext(f));
3155 }
9e353e3b 3156 }
14a5cf38 3157 return code;
9e353e3b
NIS		 3158}
3159
3160Off_t
f62ce20a 3161PerlIOBuf_tell(pTHX_ PerlIO *f)
9e353e3b 3162{
14a5cf38
JH		 3163 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3164 /*
71200d45 3165 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3166 */
3167 Off_t posn = b->posn;
3168 if (b->buf) {
3169 /*
71200d45 3170 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3171 */
3172 posn += (b->ptr - b->buf);
3173 }
3174 return posn;
9e353e3b
NIS		 3175}
3176
3177IV
f62ce20a 3178PerlIOBuf_close(pTHX_ PerlIO *f)
9e353e3b 3179{
f62ce20a 3180 IV code = PerlIOBase_close(aTHX_ f);
14a5cf38
JH		 3181 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3182 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3183 Safefree(b->buf);
14a5cf38
JH		 3184 }
3185 b->buf = NULL;
3186 b->ptr = b->end = b->buf;
3187 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3188 return code;
760ac839
LW		 3189}
3190
9e353e3b 3191STDCHAR *
f62ce20a 3192PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3193{
14a5cf38
JH		 3194 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3195 if (!b->buf)
3196 PerlIO_get_base(f);
3197 return b->ptr;
9e353e3b
NIS		 3198}
3199
05d1247b 3200SSize_t
f62ce20a 3201PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3202{
14a5cf38
JH		 3203 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3204 if (!b->buf)
3205 PerlIO_get_base(f);
3206 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3207 return (b->end - b->ptr);
3208 return 0;
9e353e3b
NIS		 3209}
3210
3211STDCHAR *
f62ce20a 3212PerlIOBuf_get_base(pTHX_ PerlIO *f)
9e353e3b 3213{
14a5cf38
JH		 3214 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3215 if (!b->buf) {
3216 if (!b->bufsiz)
3217 b->bufsiz = 4096;
a1ea730d 3218 b->buf =
7fcdafbd 3219 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3220 if (!b->buf) {
3221 b->buf = (STDCHAR *) & b->oneword;
3222 b->bufsiz = sizeof(b->oneword);
3223 }
3224 b->ptr = b->buf;
3225 b->end = b->ptr;
06da4f11 3226 }
14a5cf38 3227 return b->buf;
9e353e3b
NIS		 3228}
3229
3230Size_t
f62ce20a 3231PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3232{
14a5cf38
JH		 3233 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3234 if (!b->buf)
3235 PerlIO_get_base(f);
3236 return (b->end - b->buf);
9e353e3b
NIS		 3237}
3238
3239void
f62ce20a 3240PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3241{
14a5cf38
JH		 3242 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3243 if (!b->buf)
3244 PerlIO_get_base(f);
3245 b->ptr = ptr;
3246 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3247 dTHX;
3248 assert(PerlIO_get_cnt(f) == cnt);
3249 assert(b->ptr >= b->buf);
3250 }
3251 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3252}
3253
71200d45 3254PerlIO *
ecdeb87c 3255PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 3256{
ecdeb87c 3257 return PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 3258}
3259
3260
3261
9e353e3b 3262PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3263 "perlio",
3264 sizeof(PerlIOBuf),
3265 PERLIO_K_BUFFERED,
3266 PerlIOBuf_pushed,
3267 PerlIOBase_noop_ok,
3268 PerlIOBuf_open,
3269 NULL,
3270 PerlIOBase_fileno,
71200d45 3271 PerlIOBuf_dup,
14a5cf38
JH		 3272 PerlIOBuf_read,
3273 PerlIOBuf_unread,
3274 PerlIOBuf_write,
3275 PerlIOBuf_seek,
3276 PerlIOBuf_tell,
3277 PerlIOBuf_close,
3278 PerlIOBuf_flush,
3279 PerlIOBuf_fill,
3280 PerlIOBase_eof,
3281 PerlIOBase_error,
3282 PerlIOBase_clearerr,
3283 PerlIOBase_setlinebuf,
3284 PerlIOBuf_get_base,
3285 PerlIOBuf_bufsiz,
3286 PerlIOBuf_get_ptr,
3287 PerlIOBuf_get_cnt,
3288 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3289};
3290
66ecd56b 3291/*--------------------------------------------------------------------------------------*/
14a5cf38 3292/*
71200d45 3293 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3294 */
5e2ab84b
NIS		 3295
3296IV
f62ce20a 3297PerlIOPending_fill(pTHX_ PerlIO *f)
5e2ab84b 3298{
14a5cf38 3299 /*
71200d45 3300 * Should never happen
14a5cf38
JH		 3301 */
3302 PerlIO_flush(f);
3303 return 0;
5e2ab84b
NIS		 3304}
3305
3306IV
f62ce20a 3307PerlIOPending_close(pTHX_ PerlIO *f)
5e2ab84b 3308{
14a5cf38 3309 /*
71200d45 3310 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3311 */
3312 PerlIO_flush(f);
3313 return PerlIO_close(f);
5e2ab84b
NIS		 3314}
3315
3316IV
f62ce20a 3317PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
5e2ab84b 3318{
14a5cf38 3319 /*
71200d45 3320 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3321 */
3322 PerlIO_flush(f);
3323 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3324}
3325
3326
3327IV
f62ce20a 3328PerlIOPending_flush(pTHX_ PerlIO *f)
5e2ab84b 3329{
14a5cf38
JH		 3330 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3331 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3332 Safefree(b->buf);
14a5cf38
JH		 3333 b->buf = NULL;
3334 }
3335 PerlIO_pop(aTHX_ f);
3336 return 0;
5e2ab84b
NIS		 3337}
3338
3339void
f62ce20a 3340PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3341{
14a5cf38
JH		 3342 if (cnt <= 0) {
3343 PerlIO_flush(f);
3344 }
3345 else {
f62ce20a 3346 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
14a5cf38 3347 }
5e2ab84b
NIS		 3348}
3349
3350IV
f62ce20a 3351PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3352{
f62ce20a 3353 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
14a5cf38
JH		 3354 PerlIOl *l = PerlIOBase(f);
3355 /*
71200d45
NIS		 3356 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3357 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3358 */
3359 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3360 (PerlIOBase(PerlIONext(f))->
3361 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3362 return code;
5e2ab84b
NIS		 3363}
3364
3365SSize_t
f62ce20a 3366PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
5e2ab84b 3367{
14a5cf38
JH		 3368 SSize_t avail = PerlIO_get_cnt(f);
3369 SSize_t got = 0;
3370 if (count < avail)
3371 avail = count;
3372 if (avail > 0)
f62ce20a 3373 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
14a5cf38
JH		 3374 if (got >= 0 && got < count) {
3375 SSize_t more =
3376 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3377 if (more >= 0 || got == 0)
3378 got += more;
3379 }
3380 return got;
5e2ab84b
NIS		 3381}
3382
5e2ab84b 3383PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3384 "pending",
3385 sizeof(PerlIOBuf),
3386 PERLIO_K_BUFFERED,
3387 PerlIOPending_pushed,
3388 PerlIOBase_noop_ok,
3389 NULL,
3390 NULL,
3391 PerlIOBase_fileno,
71200d45 3392 PerlIOBuf_dup,
14a5cf38
JH		 3393 PerlIOPending_read,
3394 PerlIOBuf_unread,
3395 PerlIOBuf_write,
3396 PerlIOPending_seek,
3397 PerlIOBuf_tell,
3398 PerlIOPending_close,
3399 PerlIOPending_flush,
3400 PerlIOPending_fill,
3401 PerlIOBase_eof,
3402 PerlIOBase_error,
3403 PerlIOBase_clearerr,
3404 PerlIOBase_setlinebuf,
3405 PerlIOBuf_get_base,
3406 PerlIOBuf_bufsiz,
3407 PerlIOBuf_get_ptr,
3408 PerlIOBuf_get_cnt,
3409 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3410};
3411
3412
3413
3414/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3415/*
3416 * crlf - translation On read translate CR,LF to "\n" we do this by
3417 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3418 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3419 */
3420
14a5cf38
JH		 3421typedef struct {
3422 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3423 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3424 * buffer */
99efab12
NIS		 3425} PerlIOCrlf;
3426
f5b9d040 3427IV
f62ce20a 3428PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
f5b9d040 3429{
14a5cf38
JH		 3430 IV code;
3431 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
f62ce20a 3432 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
5e2ab84b 3433#if 0
14a5cf38
JH		 3434 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3435 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3436 PerlIOBase(f)->flags);
5e2ab84b 3437#endif
14a5cf38 3438 return code;
f5b9d040
NIS		 3439}
3440
3441
99efab12 3442SSize_t
f62ce20a 3443PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 3444{
14a5cf38
JH		 3445 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3446 if (c->nl) {
3447 *(c->nl) = 0xd;
3448 c->nl = NULL;
3449 }
3450 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 3451 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 3452 else {
3453 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3454 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3455 SSize_t unread = 0;
3456 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3457 PerlIO_flush(f);
3458 if (!b->buf)
3459 PerlIO_get_base(f);
3460 if (b->buf) {
3461 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3462 b->end = b->ptr = b->buf + b->bufsiz;
3463 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3464 b->posn -= b->bufsiz;
3465 }
3466 while (count > 0 && b->ptr > b->buf) {
3467 int ch = *--buf;
3468 if (ch == '\n') {
3469 if (b->ptr - 2 >= b->buf) {
3470 *--(b->ptr) = 0xa;
3471 *--(b->ptr) = 0xd;
3472 unread++;
3473 count--;
3474 }
3475 else {
3476 buf++;
3477 break;
3478 }
3479 }
3480 else {
3481 *--(b->ptr) = ch;
3482 unread++;
3483 count--;
3484 }
3485 }
3486 }
3487 return unread;
3488 }
99efab12
NIS		 3489}
3490
3491SSize_t
f62ce20a 3492PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
99efab12 3493{
14a5cf38
JH		 3494 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3495 if (!b->buf)
3496 PerlIO_get_base(f);
3497 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3498 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3499 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3500 STDCHAR *nl = b->ptr;
3501 scan:
3502 while (nl < b->end && *nl != 0xd)
3503 nl++;
3504 if (nl < b->end && *nl == 0xd) {
3505 test:
3506 if (nl + 1 < b->end) {
3507 if (nl[1] == 0xa) {
3508 *nl = '\n';
3509 c->nl = nl;
3510 }
3511 else {
3512 /*
71200d45 3513 * Not CR,LF but just CR
14a5cf38
JH		 3514 */
3515 nl++;
3516 goto scan;
3517 }
3518 }
3519 else {
3520 /*
71200d45 3521 * Blast - found CR as last char in buffer
14a5cf38 3522 */
a0d1d361 3523
14a5cf38
JH		 3524 if (b->ptr < nl) {
3525 /*
3526 * They may not care, defer work as long as
71200d45 3527 * possible
14a5cf38 3528 */
a0d1d361 3529 c->nl = nl;
14a5cf38
JH		 3530 return (nl - b->ptr);
3531 }
3532 else {
3533 int code;
3534 b->ptr++; /* say we have read it as far as
3535 * flush() is concerned */
d1be9408 3536 b->buf++; /* Leave space in front of buffer */
14a5cf38
JH		 3537 b->bufsiz--; /* Buffer is thus smaller */
3538 code = PerlIO_fill(f); /* Fetch some more */
3539 b->bufsiz++; /* Restore size for next time */
3540 b->buf--; /* Point at space */
3541 b->ptr = nl = b->buf; /* Which is what we hand
3542 * off */
3543 b->posn--; /* Buffer starts here */
3544 *nl = 0xd; /* Fill in the CR */
3545 if (code == 0)
3546 goto test; /* fill() call worked */
3547 /*
71200d45 3548 * CR at EOF - just fall through
14a5cf38 3549 */
a0d1d361 3550 /* Should we clear EOF though ??? */
14a5cf38
JH		 3551 }
3552 }
3553 }
3554 }
3555 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3556 }
3557 return 0;
99efab12
NIS		 3558}
3559
3560void
f62ce20a 3561PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
14a5cf38
JH		 3562{
3563 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3564 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3565 IV flags = PerlIOBase(f)->flags;
3566 if (!b->buf)
3567 PerlIO_get_base(f);
3568 if (!ptr) {
a0d1d361 3569 if (c->nl) {
14a5cf38 3570 ptr = c->nl + 1;
a0d1d361
NIS		 3571 if (ptr == b->end && *c->nl == 0xd) {
3572 /* Defered CR at end of buffer case - we lied about count */
3573 ptr--;
3574 }
3575 }
14a5cf38
JH		 3576 else {
3577 ptr = b->end;
14a5cf38
JH		 3578 }
3579 ptr -= cnt;
3580 }
3581 else {
3582 /*
71200d45 3583 * Test code - delete when it works ...
14a5cf38 3584 */
ba7abf9d 3585 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
a0d1d361
NIS		 3586 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3587 /* Defered CR at end of buffer case - we lied about count */
3588 chk--;
3589 }
14a5cf38
JH		 3590 chk -= cnt;
3591
a0d1d361
NIS		 3592 if (ptr != chk ) {
3593 Perl_warn(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
14a5cf38
JH		 3594 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3595 b->end, cnt);
3596 }
3597 }
3598 if (c->nl) {
3599 if (ptr > c->nl) {
3600 /*
71200d45 3601 * They have taken what we lied about
14a5cf38
JH		 3602 */
3603 *(c->nl) = 0xd;
3604 c->nl = NULL;
3605 ptr++;
3606 }
3607 }
3608 b->ptr = ptr;
3609 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3610}
3611
3612SSize_t
f62ce20a 3613PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 3614{
14a5cf38 3615 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 3616 return PerlIOBuf_write(aTHX_ f, vbuf, count);
14a5cf38
JH		 3617 else {
3618 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3619 const STDCHAR *buf = (const STDCHAR *) vbuf;
3620 const STDCHAR *ebuf = buf + count;
3621 if (!b->buf)
3622 PerlIO_get_base(f);
3623 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3624 return 0;
3625 while (buf < ebuf) {
3626 STDCHAR *eptr = b->buf + b->bufsiz;
3627 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3628 while (buf < ebuf && b->ptr < eptr) {
3629 if (*buf == '\n') {
3630 if ((b->ptr + 2) > eptr) {
3631 /*
71200d45 3632 * Not room for both
14a5cf38
JH		 3633 */
3634 PerlIO_flush(f);
3635 break;
3636 }
3637 else {
3638 *(b->ptr)++ = 0xd; /* CR */
3639 *(b->ptr)++ = 0xa; /* LF */
3640 buf++;
3641 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3642 PerlIO_flush(f);
3643 break;
3644 }
3645 }
3646 }
3647 else {
3648 int ch = *buf++;
3649 *(b->ptr)++ = ch;
3650 }
3651 if (b->ptr >= eptr) {
3652 PerlIO_flush(f);
3653 break;
3654 }
3655 }
3656 }
3657 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3658 PerlIO_flush(f);
3659 return (buf - (STDCHAR *) vbuf);
3660 }
99efab12
NIS		 3661}
3662
3663IV
f62ce20a 3664PerlIOCrlf_flush(pTHX_ PerlIO *f)
99efab12 3665{
14a5cf38
JH		 3666 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3667 if (c->nl) {
3668 *(c->nl) = 0xd;
3669 c->nl = NULL;
3670 }
f62ce20a 3671 return PerlIOBuf_flush(aTHX_ f);
99efab12
NIS		 3672}
3673
66ecd56b 3674PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3675 "crlf",
3676 sizeof(PerlIOCrlf),
3677 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3678 PerlIOCrlf_pushed,
3679 PerlIOBase_noop_ok, /* popped */
3680 PerlIOBuf_open,
3681 NULL,
3682 PerlIOBase_fileno,
71200d45 3683 PerlIOBuf_dup,
14a5cf38
JH		 3684 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3685 * ... */
3686 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3687 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3688 PerlIOBuf_seek,
3689 PerlIOBuf_tell,
3690 PerlIOBuf_close,
3691 PerlIOCrlf_flush,
3692 PerlIOBuf_fill,
3693 PerlIOBase_eof,
3694 PerlIOBase_error,
3695 PerlIOBase_clearerr,
3696 PerlIOBase_setlinebuf,
3697 PerlIOBuf_get_base,
3698 PerlIOBuf_bufsiz,
3699 PerlIOBuf_get_ptr,
3700 PerlIOCrlf_get_cnt,
3701 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3702};
3703
06da4f11
NIS		 3704#ifdef HAS_MMAP
3705/*--------------------------------------------------------------------------------------*/
14a5cf38 3706/*
71200d45 3707 * mmap as "buffer" layer
14a5cf38 3708 */
06da4f11 3709
14a5cf38
JH		 3710typedef struct {
3711 PerlIOBuf base; /* PerlIOBuf stuff */
3712 Mmap_t mptr; /* Mapped address */
3713 Size_t len; /* mapped length */
3714 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3715} PerlIOMmap;
3716
c3d7c7c9
NIS		 3717static size_t page_size = 0;
3718
06da4f11 3719IV
f62ce20a 3720PerlIOMmap_map(pTHX_ PerlIO *f)
06da4f11 3721{
14a5cf38
JH		 3722 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3723 IV flags = PerlIOBase(f)->flags;
3724 IV code = 0;
3725 if (m->len)
3726 abort();
3727 if (flags & PERLIO_F_CANREAD) {
3728 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3729 int fd = PerlIO_fileno(f);
10eefe7f
CB		 3730 Stat_t st;
3731 code = Fstat(fd, &st);
14a5cf38
JH		 3732 if (code == 0 && S_ISREG(st.st_mode)) {
3733 SSize_t len = st.st_size - b->posn;
3734 if (len > 0) {
3735 Off_t posn;
3736 if (!page_size) {
68d873c6 3737#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3738 {
3739 SETERRNO(0, SS$_NORMAL);
68d873c6 3740# ifdef _SC_PAGESIZE
14a5cf38 3741 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3742# else
14a5cf38 3743 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3744# endif
14a5cf38
JH		 3745 if ((long) page_size < 0) {
3746 if (errno) {
3747 SV *error = ERRSV;
3748 char *msg;
3749 STRLEN n_a;
3750 (void) SvUPGRADE(error, SVt_PV);
3751 msg = SvPVx(error, n_a);
3752 Perl_croak(aTHX_ "panic: sysconf: %s",
3753 msg);
3754 }
3755 else
3756 Perl_croak(aTHX_
3757 "panic: sysconf: pagesize unknown");
3758 }
3759 }
68d873c6
JH		 3760#else
3761# ifdef HAS_GETPAGESIZE
14a5cf38 3762 page_size = getpagesize();
68d873c6
JH		 3763# else
3764# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3765 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3766# endif
3767# endif
3768#endif
14a5cf38
JH		 3769 if ((IV) page_size <= 0)
3770 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3771 (IV) page_size);
3772 }
3773 if (b->posn < 0) {
3774 /*
3775 * This is a hack - should never happen - open should
71200d45 3776 * have set it !
14a5cf38
JH		 3777 */
3778 b->posn = PerlIO_tell(PerlIONext(f));
3779 }
3780 posn = (b->posn / page_size) * page_size;
3781 len = st.st_size - posn;
3782 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3783 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3784#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3785 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3786#endif
a5262162 3787#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3788 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3789#endif
14a5cf38
JH		 3790 PerlIOBase(f)->flags =
3791 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3792 b->end = ((STDCHAR *) m->mptr) + len;
3793 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3794 b->ptr = b->buf;
3795 m->len = len;
3796 }
3797 else {
3798 b->buf = NULL;
3799 }
3800 }
3801 else {
3802 PerlIOBase(f)->flags =
3803 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3804 b->buf = NULL;
3805 b->ptr = b->end = b->ptr;
3806 code = -1;
3807 }
3808 }
3809 }
3810 return code;
06da4f11
NIS		 3811}
3812
3813IV
3814PerlIOMmap_unmap(PerlIO *f)
3815{
14a5cf38
JH		 3816 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3817 PerlIOBuf *b = &m->base;
3818 IV code = 0;
3819 if (m->len) {
3820 if (b->buf) {
3821 code = munmap(m->mptr, m->len);
3822 b->buf = NULL;
3823 m->len = 0;
3824 m->mptr = NULL;
3825 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3826 code = -1;
3827 }
3828 b->ptr = b->end = b->buf;
3829 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3830 }
3831 return code;
06da4f11
NIS		 3832}
3833
3834STDCHAR *
f62ce20a 3835PerlIOMmap_get_base(pTHX_ PerlIO *f)
06da4f11 3836{
14a5cf38
JH		 3837 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3838 PerlIOBuf *b = &m->base;
3839 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3840 /*
71200d45 3841 * Already have a readbuffer in progress
14a5cf38
JH		 3842 */
3843 return b->buf;
3844 }
3845 if (b->buf) {
3846 /*
71200d45 3847 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3848 */
3849 m->bbuf = b->buf; /* save it in case we need it again */
3850 b->buf = NULL; /* Clear to trigger below */
3851 }
3852 if (!b->buf) {
f62ce20a 3853 PerlIOMmap_map(aTHX_ f); /* Try and map it */
14a5cf38
JH		 3854 if (!b->buf) {
3855 /*
71200d45 3856 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3857 */
3858 b->buf = m->bbuf;
3859 }
3860 }
3861 b->ptr = b->end = b->buf;
3862 if (b->buf)
3863 return b->buf;
f62ce20a 3864 return PerlIOBuf_get_base(aTHX_ f);