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14a5cf38 1/*
be3c0a43 2 * perlio.c Copyright (c) 1996-2002, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW
5 */
6
14a5cf38 7/*
d31a8517
AT
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
10 */
11
12/*
71200d45 13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 14 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 15 * Invent a dSYS macro to abstract this out
14a5cf38 16 */
7bcba3d4
NIS
17#ifdef PERL_IMPLICIT_SYS
18#define dSYS dTHX
19#else
20#define dSYS dNOOP
21#endif
22
760ac839 23#define VOIDUSED 1
12ae5dfc
JH
24#ifdef PERL_MICRO
25# include "uconfig.h"
26#else
27# include "config.h"
28#endif
760ac839 29
6f9d8c32 30#define PERLIO_NOT_STDIO 0
760ac839 31#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 32/*
71200d45 33 * #define PerlIO FILE
14a5cf38 34 */
760ac839
LW
35#endif
36/*
6f9d8c32 37 * This file provides those parts of PerlIO abstraction
88b61e10 38 * which are not #defined in perlio.h.
6f9d8c32 39 * Which these are depends on various Configure #ifdef's
760ac839
LW
40 */
41
42#include "EXTERN.h"
864dbfa3 43#define PERL_IN_PERLIO_C
760ac839
LW
44#include "perl.h"
45
32af7c23
CL
46#ifdef PERL_IMPLICIT_CONTEXT
47#undef dSYS
48#define dSYS dTHX
49#endif
50
0c4f7ff0
NIS
51#include "XSUB.h"
52
60382766 53int
f5b9d040 54perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 55{
14a5cf38 56 /*
71200d45 57 * This used to be contents of do_binmode in doio.c
14a5cf38 58 */
60382766
NIS
59#ifdef DOSISH
60# if defined(atarist) || defined(__MINT__)
f5b9d040 61 if (!fflush(fp)) {
60382766 62 if (mode & O_BINARY)
14a5cf38 63 ((FILE *) fp)->_flag |= _IOBIN;
60382766 64 else
14a5cf38 65 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS
66 return 1;
67 }
68 return 0;
69# else
eb73beca 70 dTHX;
14a5cf38
JH
71#ifdef NETWARE
72 if (PerlLIO_setmode(fp, mode) != -1) {
73#else
f5b9d040 74 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 75#endif
60382766 76# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 77 /*
71200d45 78 * The translation mode of the stream is maintained independent of
14a5cf38 79 * the translation mode of the fd in the Borland RTL (heavy
71200d45 80 * digging through their runtime sources reveal). User has to set
14a5cf38 81 * the mode explicitly for the stream (though they don't document
71200d45 82 * this anywhere). GSAR 97-5-24
60382766 83 */
14a5cf38 84 fseek(fp, 0L, 0);
60382766 85 if (mode & O_BINARY)
f5b9d040 86 fp->flags |= _F_BIN;
60382766 87 else
14a5cf38 88 fp->flags &= ~_F_BIN;
60382766
NIS
89# endif
90 return 1;
91 }
92 else
93 return 0;
94# endif
95#else
96# if defined(USEMYBINMODE)
04a0f00b 97 dTHX;
60382766
NIS
98 if (my_binmode(fp, iotype, mode) != FALSE)
99 return 1;
100 else
101 return 0;
102# else
103 return 1;
104# endif
105#endif
106}
107
06c7082d 108#ifndef O_ACCMODE
22569500 109#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
110#endif
111
112int
113PerlIO_intmode2str(int rawmode, char *mode, int *writing)
114{
115 int result = rawmode & O_ACCMODE;
116 int ix = 0;
117 int ptype;
118 switch (result) {
119 case O_RDONLY:
120 ptype = IoTYPE_RDONLY;
121 break;
122 case O_WRONLY:
123 ptype = IoTYPE_WRONLY;
124 break;
125 case O_RDWR:
126 default:
127 ptype = IoTYPE_RDWR;
128 break;
129 }
130 if (writing)
131 *writing = (result != O_RDONLY);
132
133 if (result == O_RDONLY) {
134 mode[ix++] = 'r';
135 }
136#ifdef O_APPEND
137 else if (rawmode & O_APPEND) {
138 mode[ix++] = 'a';
139 if (result != O_WRONLY)
140 mode[ix++] = '+';
141 }
142#endif
143 else {
144 if (result == O_WRONLY)
145 mode[ix++] = 'w';
146 else {
147 mode[ix++] = 'r';
148 mode[ix++] = '+';
149 }
150 }
151 if (rawmode & O_BINARY)
152 mode[ix++] = 'b';
153 mode[ix] = '\0';
154 return ptype;
155}
156
eb73beca
NIS
157#ifndef PERLIO_LAYERS
158int
159PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
160{
6874a2de
NIS
161 if (!names || !*names
162 || strEQ(names, ":crlf")
163 || strEQ(names, ":raw")
164 || strEQ(names, ":bytes")
165 ) {
14a5cf38
JH
166 return 0;
167 }
168 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
169 /*
71200d45 170 * NOTREACHED
14a5cf38
JH
171 */
172 return -1;
eb73beca
NIS
173}
174
13621cfb
NIS
175void
176PerlIO_destruct(pTHX)
177{
178}
179
f5b9d040
NIS
180int
181PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
182{
92bff44d 183#ifdef USE_SFIO
14a5cf38 184 return 1;
92bff44d 185#else
14a5cf38 186 return perlsio_binmode(fp, iotype, mode);
92bff44d 187#endif
f5b9d040 188}
60382766 189
e0fa5af2 190PerlIO *
ecdeb87c 191PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 192{
0553478e
NIS
193#ifdef PERL_MICRO
194 return NULL;
195#else
196#ifdef PERL_IMPLICIT_SYS
22569500 197 return PerlSIO_fdupopen(f);
0553478e 198#else
30753f56
NIS
199#ifdef WIN32
200 return win32_fdupopen(f);
201#else
e0fa5af2
NIS
202 if (f) {
203 int fd = PerlLIO_dup(PerlIO_fileno(f));
204 if (fd >= 0) {
06c7082d
NIS
205 char mode[8];
206 int omode = fcntl(fd, F_GETFL);
a5936e02
JH
207#ifdef DJGPP
208 omode = djgpp_get_stream_mode(f);
209#endif
06c7082d 210 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 211 /* the r+ is a hack */
06c7082d 212 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
213 }
214 return NULL;
215 }
216 else {
93189314 217 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 218 }
7114a2d2 219#endif
e0fa5af2 220 return NULL;
0553478e 221#endif
30753f56 222#endif
e0fa5af2
NIS
223}
224
225
14a5cf38 226/*
71200d45 227 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 228 */
ee518936
NIS
229
230PerlIO *
14a5cf38
JH
231PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
232 int imode, int perm, PerlIO *old, int narg, SV **args)
233{
7cf31beb
NIS
234 if (narg) {
235 if (narg > 1) {
3b8752bb 236 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 237 }
14a5cf38
JH
238 if (*args == &PL_sv_undef)
239 return PerlIO_tmpfile();
240 else {
241 char *name = SvPV_nolen(*args);
242 if (*mode == '#') {
243 fd = PerlLIO_open3(name, imode, perm);
244 if (fd >= 0)
245 return PerlIO_fdopen(fd, (char *) mode + 1);
246 }
247 else if (old) {
248 return PerlIO_reopen(name, mode, old);
249 }
250 else {
251 return PerlIO_open(name, mode);
252 }
253 }
254 }
255 else {
256 return PerlIO_fdopen(fd, (char *) mode);
257 }
258 return NULL;
ee518936
NIS
259}
260
0c4f7ff0
NIS
261XS(XS_PerlIO__Layer__find)
262{
14a5cf38
JH
263 dXSARGS;
264 if (items < 2)
265 Perl_croak(aTHX_ "Usage class->find(name[,load])");
266 else {
267 char *name = SvPV_nolen(ST(1));
268 ST(0) = (strEQ(name, "crlf")
269 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
270 XSRETURN(1);
271 }
0c4f7ff0
NIS
272}
273
274
275void
276Perl_boot_core_PerlIO(pTHX)
277{
14a5cf38 278 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
279}
280
ac27b0f5
NIS
281#endif
282
32e30700 283
6f9d8c32 284#ifdef PERLIO_IS_STDIO
760ac839
LW
285
286void
e8632036 287PerlIO_init(pTHX)
760ac839 288{
14a5cf38
JH
289 /*
290 * Does nothing (yet) except force this file to be included in perl
71200d45 291 * binary. That allows this file to force inclusion of other functions
14a5cf38 292 * that may be required by loadable extensions e.g. for
71200d45 293 * FileHandle::tmpfile
14a5cf38 294 */
760ac839
LW
295}
296
33dcbb9a
PP
297#undef PerlIO_tmpfile
298PerlIO *
8ac85365 299PerlIO_tmpfile(void)
33dcbb9a 300{
14a5cf38 301 return tmpfile();
33dcbb9a
PP
302}
303
22569500 304#else /* PERLIO_IS_STDIO */
760ac839
LW
305
306#ifdef USE_SFIO
307
308#undef HAS_FSETPOS
309#undef HAS_FGETPOS
310
14a5cf38
JH
311/*
312 * This section is just to make sure these functions get pulled in from
71200d45 313 * libsfio.a
14a5cf38 314 */
760ac839
LW
315
316#undef PerlIO_tmpfile
317PerlIO *
c78749f2 318PerlIO_tmpfile(void)
760ac839 319{
14a5cf38 320 return sftmp(0);
760ac839
LW
321}
322
323void
e8632036 324PerlIO_init(pTHX)
760ac839 325{
14a5cf38
JH
326 /*
327 * Force this file to be included in perl binary. Which allows this
328 * file to force inclusion of other functions that may be required by
71200d45 329 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 330 */
760ac839 331
14a5cf38 332 /*
71200d45 333 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 334 * results in a lot of lseek()s to regular files and lot of small
71200d45 335 * writes to pipes.
14a5cf38
JH
336 */
337 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
338}
339
b9d6bf13 340/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 341PerlIO *
4b069b44 342PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 343{
14a5cf38 344 int fd = fileno(stdio);
4b069b44 345 if (!mode || !*mode) {
81428673 346 mode = "r+";
4b069b44
NIS
347 }
348 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
349}
350
351FILE *
352PerlIO_findFILE(PerlIO *pio)
353{
14a5cf38
JH
354 int fd = PerlIO_fileno(pio);
355 FILE *f = fdopen(fd, "r+");
356 PerlIO_flush(pio);
357 if (!f && errno == EINVAL)
358 f = fdopen(fd, "w");
359 if (!f && errno == EINVAL)
360 f = fdopen(fd, "r");
361 return f;
92bff44d
NIS
362}
363
364
22569500 365#else /* USE_SFIO */
6f9d8c32 366/*======================================================================================*/
14a5cf38 367/*
71200d45 368 * Implement all the PerlIO interface ourselves.
9e353e3b 369 */
760ac839 370
76ced9ad
NIS
371#include "perliol.h"
372
14a5cf38
JH
373/*
374 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 375 * files
14a5cf38 376 */
02f66e2f
NIS
377#ifdef I_UNISTD
378#include <unistd.h>
379#endif
06da4f11
NIS
380#ifdef HAS_MMAP
381#include <sys/mman.h>
382#endif
383
02f66e2f 384
14a5cf38
JH
385void PerlIO_debug(const char *fmt, ...)
386 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 387
6f9d8c32 388void
14a5cf38
JH
389PerlIO_debug(const char *fmt, ...)
390{
391 static int dbg = 0;
392 va_list ap;
393 dSYS;
394 va_start(ap, fmt);
395 if (!dbg) {
396 char *s = PerlEnv_getenv("PERLIO_DEBUG");
397 if (s && *s)
398 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
399 else
400 dbg = -1;
401 }
402 if (dbg > 0) {
403 dTHX;
70ace5da
NIS
404#ifdef USE_ITHREADS
405 /* Use fixed buffer as sv_catpvf etc. needs SVs */
406 char buffer[1024];
407 char *s;
408 STRLEN len;
409 s = CopFILE(PL_curcop);
410 if (!s)
411 s = "(none)";
412 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
22569500 413 len = strlen(buffer);
70ace5da
NIS
414 vsprintf(buffer+len, fmt, ap);
415 PerlLIO_write(dbg, buffer, strlen(buffer));
416#else
14a5cf38
JH
417 SV *sv = newSVpvn("", 0);
418 char *s;
419 STRLEN len;
420 s = CopFILE(PL_curcop);
421 if (!s)
422 s = "(none)";
423 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
424 (IV) CopLINE(PL_curcop));
425 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
426
427 s = SvPV(sv, len);
428 PerlLIO_write(dbg, s, len);
429 SvREFCNT_dec(sv);
70ace5da 430#endif
14a5cf38
JH
431 }
432 va_end(ap);
6f9d8c32
NIS
433}
434
9e353e3b
NIS
435/*--------------------------------------------------------------------------------------*/
436
14a5cf38 437/*
71200d45 438 * Inner level routines
14a5cf38 439 */
9e353e3b 440
14a5cf38 441/*
71200d45 442 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 443 */
05d1247b 444#define PERLIO_TABLE_SIZE 64
6f9d8c32 445
760ac839 446PerlIO *
5f1a76d0 447PerlIO_allocate(pTHX)
6f9d8c32 448{
14a5cf38 449 /*
71200d45 450 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
451 */
452 PerlIO **last;
453 PerlIO *f;
a1ea730d 454 last = &PL_perlio;
14a5cf38
JH
455 while ((f = *last)) {
456 int i;
457 last = (PerlIO **) (f);
458 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
459 if (!*++f) {
460 return f;
461 }
462 }
463 }
3a1ee7e8 464 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
465 if (!f) {
466 return NULL;
467 }
468 *last = f;
469 return f + 1;
05d1247b
NIS
470}
471
a1ea730d
NIS
472#undef PerlIO_fdupopen
473PerlIO *
ecdeb87c 474PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 475{
04892f78 476 if (PerlIOValid(f)) {
a1ea730d
NIS
477 PerlIO_funcs *tab = PerlIOBase(f)->tab;
478 PerlIO *new;
fe5a182c 479 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
22569500 480 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
a1ea730d
NIS
481 return new;
482 }
483 else {
93189314 484 SETERRNO(EBADF, SS_IVCHAN);
a1ea730d
NIS
485 return NULL;
486 }
487}
488
489void
5f1a76d0 490PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 491{
14a5cf38
JH
492 PerlIO *table = *tablep;
493 if (table) {
494 int i;
495 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
496 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
497 PerlIO *f = table + i;
498 if (*f) {
499 PerlIO_close(f);
500 }
501 }
3a1ee7e8 502 Safefree(table);
14a5cf38 503 *tablep = NULL;
05d1247b 504 }
05d1247b
NIS
505}
506
fcf2db38
NIS
507
508PerlIO_list_t *
3a1ee7e8 509PerlIO_list_alloc(pTHX)
fcf2db38 510{
14a5cf38
JH
511 PerlIO_list_t *list;
512 Newz('L', list, 1, PerlIO_list_t);
513 list->refcnt = 1;
514 return list;
fcf2db38
NIS
515}
516
517void
3a1ee7e8 518PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 519{
14a5cf38
JH
520 if (list) {
521 if (--list->refcnt == 0) {
522 if (list->array) {
14a5cf38
JH
523 IV i;
524 for (i = 0; i < list->cur; i++) {
525 if (list->array[i].arg)
526 SvREFCNT_dec(list->array[i].arg);
527 }
528 Safefree(list->array);
529 }
530 Safefree(list);
531 }
532 }
fcf2db38
NIS
533}
534
535void
3a1ee7e8 536PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 537{
14a5cf38
JH
538 PerlIO_pair_t *p;
539 if (list->cur >= list->len) {
540 list->len += 8;
541 if (list->array)
542 Renew(list->array, list->len, PerlIO_pair_t);
543 else
544 New('l', list->array, list->len, PerlIO_pair_t);
545 }
546 p = &(list->array[list->cur++]);
547 p->funcs = funcs;
548 if ((p->arg = arg)) {
549 SvREFCNT_inc(arg);
550 }
fcf2db38
NIS
551}
552
3a1ee7e8
NIS
553PerlIO_list_t *
554PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
555{
694c95cf
JH
556 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
557 if (proto) {
558 int i;
559 list = PerlIO_list_alloc(aTHX);
560 for (i=0; i < proto->cur; i++) {
561 SV *arg = Nullsv;
562 if (proto->array[i].arg)
563 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
564 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
565 }
3a1ee7e8
NIS
566 }
567 return list;
568}
4a4a6116 569
05d1247b 570void
3a1ee7e8 571PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 572{
3aaf42a7 573#ifdef USE_ITHREADS
3a1ee7e8
NIS
574 PerlIO **table = &proto->Iperlio;
575 PerlIO *f;
576 PL_perlio = NULL;
577 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
578 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
579 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 580 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS
581 while ((f = *table)) {
582 int i;
583 table = (PerlIO **) (f++);
584 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
585 if (*f) {
93a8090d 586 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
587 }
588 f++;
589 }
590 }
3aaf42a7 591#endif
9a6404c5
DM
592}
593
594void
13621cfb
NIS
595PerlIO_destruct(pTHX)
596{
a1ea730d 597 PerlIO **table = &PL_perlio;
14a5cf38 598 PerlIO *f;
694c95cf
JH
599#ifdef USE_ITHREADS
600 PerlIO_debug("Destruct %p\n",aTHX);
601#endif
14a5cf38
JH
602 while ((f = *table)) {
603 int i;
604 table = (PerlIO **) (f++);
605 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
606 PerlIO *x = f;
607 PerlIOl *l;
608 while ((l = *x)) {
609 if (l->tab->kind & PERLIO_K_DESTRUCT) {
610 PerlIO_debug("Destruct popping %s\n", l->tab->name);
611 PerlIO_flush(x);
612 PerlIO_pop(aTHX_ x);
613 }
614 else {
615 x = PerlIONext(x);
616 }
617 }
618 f++;
619 }
620 }
13621cfb
NIS
621}
622
623void
a999f61b 624PerlIO_pop(pTHX_ PerlIO *f)
760ac839 625{
14a5cf38
JH
626 PerlIOl *l = *f;
627 if (l) {
fe5a182c 628 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
629 if (l->tab->Popped) {
630 /*
631 * If popped returns non-zero do not free its layer structure
632 * it has either done so itself, or it is shared and still in
71200d45 633 * use
14a5cf38 634 */
f62ce20a 635 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
636 return;
637 }
b47cad08 638 *f = l->next;
3a1ee7e8 639 Safefree(l);
a8c08ecd 640 }
6f9d8c32
NIS
641}
642
39f7a870
JH
643/* Return as an array the stack of layers on a filehandle. Note that
644 * the stack is returned top-first in the array, and there are three
645 * times as many array elements as there are layers in the stack: the
646 * first element of a layer triplet is the name, the second one is the
647 * arguments, and the third one is the flags. */
648
649AV *
650PerlIO_get_layers(pTHX_ PerlIO *f)
651{
652 AV *av = newAV();
653
654 if (PerlIOValid(f)) {
39f7a870
JH
655 PerlIOl *l = PerlIOBase(f);
656
657 while (l) {
658 SV *name = l->tab && l->tab->name ?
659 newSVpv(l->tab->name, 0) : &PL_sv_undef;
660 SV *arg = l->tab && l->tab->Getarg ?
661 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
662 av_push(av, name);
663 av_push(av, arg);
664 av_push(av, newSViv((IV)l->flags));
665 l = l->next;
666 }
667 }
668
669 return av;
670}
671
9e353e3b 672/*--------------------------------------------------------------------------------------*/
14a5cf38 673/*
71200d45 674 * XS Interface for perl code
14a5cf38 675 */
9e353e3b 676
fcf2db38 677PerlIO_funcs *
2edd7e44 678PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 679{
14a5cf38
JH
680 IV i;
681 if ((SSize_t) len <= 0)
682 len = strlen(name);
3a1ee7e8
NIS
683 for (i = 0; i < PL_known_layers->cur; i++) {
684 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38 685 if (memEQ(f->name, name, len)) {
fe5a182c 686 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
687 return f;
688 }
689 }
3a1ee7e8
NIS
690 if (load && PL_subname && PL_def_layerlist
691 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
692 if (PL_in_load_module) {
693 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
694 return NULL;
695 } else {
696 SV *pkgsv = newSVpvn("PerlIO", 6);
697 SV *layer = newSVpvn(name, len);
c9bca74a
NIS
698 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
699 ENTER;
d7a09b41 700 SAVEINT(PL_in_load_module);
c9bca74a
NIS
701 if (cv) {
702 SAVESPTR(PL_warnhook);
703 PL_warnhook = (SV *) cv;
704 }
d7a09b41
SR
705 PL_in_load_module++;
706 /*
707 * The two SVs are magically freed by load_module
708 */
709 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
710 PL_in_load_module--;
711 LEAVE;
712 return PerlIO_find_layer(aTHX_ name, len, 0);
713 }
14a5cf38
JH
714 }
715 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
716 return NULL;
f3862f8b
NIS
717}
718
2a1bc955 719#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
720
721static int
722perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
723{
14a5cf38
JH
724 if (SvROK(sv)) {
725 IO *io = GvIOn((GV *) SvRV(sv));
726 PerlIO *ifp = IoIFP(io);
727 PerlIO *ofp = IoOFP(io);
728 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
729 }
730 return 0;
b13b2135
NIS
731}
732
733static int
734perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
735{
14a5cf38
JH
736 if (SvROK(sv)) {
737 IO *io = GvIOn((GV *) SvRV(sv));
738 PerlIO *ifp = IoIFP(io);
739 PerlIO *ofp = IoOFP(io);
740 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
741 }
742 return 0;
b13b2135
NIS
743}
744
745static int
746perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
747{
14a5cf38
JH
748 Perl_warn(aTHX_ "clear %" SVf, sv);
749 return 0;
b13b2135
NIS
750}
751
752static int
753perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
754{
14a5cf38
JH
755 Perl_warn(aTHX_ "free %" SVf, sv);
756 return 0;
b13b2135
NIS
757}
758
759MGVTBL perlio_vtab = {
14a5cf38
JH
760 perlio_mg_get,
761 perlio_mg_set,
22569500 762 NULL, /* len */
14a5cf38
JH
763 perlio_mg_clear,
764 perlio_mg_free
b13b2135
NIS
765};
766
767XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
768{
14a5cf38
JH
769 dXSARGS;
770 SV *sv = SvRV(ST(1));
771 AV *av = newAV();
772 MAGIC *mg;
773 int count = 0;
774 int i;
775 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
776 SvRMAGICAL_off(sv);
777 mg = mg_find(sv, PERL_MAGIC_ext);
778 mg->mg_virtual = &perlio_vtab;
779 mg_magical(sv);
780 Perl_warn(aTHX_ "attrib %" SVf, sv);
781 for (i = 2; i < items; i++) {
782 STRLEN len;
783 const char *name = SvPV(ST(i), len);
784 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
785 if (layer) {
786 av_push(av, SvREFCNT_inc(layer));
787 }
788 else {
789 ST(count) = ST(i);
790 count++;
791 }
792 }
793 SvREFCNT_dec(av);
794 XSRETURN(count);
795}
796
22569500 797#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 798
e3f3bf95
NIS
799SV *
800PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 801{
14a5cf38
JH
802 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
803 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
804 return sv;
e3f3bf95
NIS
805}
806
c9bca74a
NIS
807XS(XS_PerlIO__Layer__NoWarnings)
808{
809 /* This is used as a %SIG{__WARN__} handler to supress warnings
810 during loading of layers.
811 */
812 dXSARGS;
813 if (items)
814 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
815 XSRETURN(0);
816}
817
0c4f7ff0
NIS
818XS(XS_PerlIO__Layer__find)
819{
14a5cf38
JH
820 dXSARGS;
821 if (items < 2)
822 Perl_croak(aTHX_ "Usage class->find(name[,load])");
823 else {
824 STRLEN len = 0;
825 char *name = SvPV(ST(1), len);
826 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
827 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
828 ST(0) =
829 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
830 &PL_sv_undef;
831 XSRETURN(1);
832 }
0c4f7ff0
NIS
833}
834
e3f3bf95
NIS
835void
836PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
837{
3a1ee7e8
NIS
838 if (!PL_known_layers)
839 PL_known_layers = PerlIO_list_alloc(aTHX);
840 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 841 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
842}
843
1141d9f8 844int
fcf2db38 845PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 846{
14a5cf38
JH
847 if (names) {
848 const char *s = names;
849 while (*s) {
850 while (isSPACE(*s) || *s == ':')
851 s++;
852 if (*s) {
853 STRLEN llen = 0;
854 const char *e = s;
855 const char *as = Nullch;
856 STRLEN alen = 0;
857 if (!isIDFIRST(*s)) {
858 /*
859 * Message is consistent with how attribute lists are
860 * passed. Even though this means "foo : : bar" is
71200d45 861 * seen as an invalid separator character.
14a5cf38
JH
862 */
863 char q = ((*s == '\'') ? '"' : '\'');
99ef548b 864 if (ckWARN(WARN_LAYER))
22569500 865 Perl_warner(aTHX_ packWARN(WARN_LAYER),
1e616cf5
JH
866 "perlio: invalid separator character %c%c%c in layer specification list %s",
867 q, *s, q, s);
93189314 868 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
869 return -1;
870 }
871 do {
872 e++;
873 } while (isALNUM(*e));
874 llen = e - s;
875 if (*e == '(') {
876 int nesting = 1;
877 as = ++e;
878 while (nesting) {
879 switch (*e++) {
880 case ')':
881 if (--nesting == 0)
882 alen = (e - 1) - as;
883 break;
884 case '(':
885 ++nesting;
886 break;
887 case '\\':
888 /*
889 * It's a nul terminated string, not allowed
890 * to \ the terminating null. Anything other
71200d45 891 * character is passed over.
14a5cf38
JH
892 */
893 if (*e++) {
894 break;
895 }
896 /*
71200d45 897 * Drop through
14a5cf38
JH
898 */
899 case '\0':
900 e--;
22569500
NIS
901 if (ckWARN(WARN_LAYER))
902 Perl_warner(aTHX_ packWARN(WARN_LAYER),
14a5cf38
JH
903 "perlio: argument list not closed for layer \"%.*s\"",
904 (int) (e - s), s);
905 return -1;
906 default:
907 /*
71200d45 908 * boring.
14a5cf38
JH
909 */
910 break;
911 }
912 }
913 }
914 if (e > s) {
99ef548b 915 bool warn_layer = ckWARN(WARN_LAYER);
14a5cf38
JH
916 PerlIO_funcs *layer =
917 PerlIO_find_layer(aTHX_ s, llen, 1);
918 if (layer) {
3a1ee7e8 919 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH
920 (as) ? newSVpvn(as,
921 alen) :
922 &PL_sv_undef);
923 }
924 else {
22569500 925 if (warn_layer)
99ef548b 926 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
14a5cf38
JH
927 (int) llen, s);
928 return -1;
929 }
930 }
931 s = e;
932 }
933 }
934 }
935 return 0;
1141d9f8
NIS
936}
937
dfebf958 938void
fcf2db38 939PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 940{
14a5cf38 941 PerlIO_funcs *tab = &PerlIO_perlio;
35990314 942#ifdef PERLIO_USING_CRLF
6ce75a77 943 tab = &PerlIO_crlf;
846be114 944#else
6ce75a77 945 if (PerlIO_stdio.Set_ptrcnt)
22569500 946 tab = &PerlIO_stdio;
846be114 947#endif
14a5cf38 948 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 949 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 950 &PL_sv_undef);
dfebf958
NIS
951}
952
e3f3bf95 953SV *
14a5cf38 954PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 955{
14a5cf38 956 return av->array[n].arg;
e3f3bf95
NIS
957}
958
f3862f8b 959PerlIO_funcs *
14a5cf38 960PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 961{
14a5cf38
JH
962 if (n >= 0 && n < av->cur) {
963 PerlIO_debug("Layer %" IVdf " is %s\n", n,
964 av->array[n].funcs->name);
965 return av->array[n].funcs;
966 }
967 if (!def)
968 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
969 return def;
e3f3bf95
NIS
970}
971
4ec2216f
NIS
972IV
973PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
974{
975 if (PerlIOValid(f)) {
976 PerlIO_flush(f);
977 PerlIO_pop(aTHX_ f);
978 return 0;
979 }
980 return -1;
981}
982
983PerlIO_funcs PerlIO_remove = {
984 sizeof(PerlIO_funcs),
985 "pop",
986 0,
987 PERLIO_K_DUMMY | PERLIO_K_UTF8,
988 PerlIOPop_pushed,
989 NULL,
990 NULL,
991 NULL,
992 NULL,
993 NULL,
994 NULL,
995 NULL,
996 NULL,
997 NULL,
998 NULL,
999 NULL, /* flush */
1000 NULL, /* fill */
1001 NULL,
1002 NULL,
1003 NULL,
1004 NULL,
1005 NULL, /* get_base */
1006 NULL, /* get_bufsiz */
1007 NULL, /* get_ptr */
1008 NULL, /* get_cnt */
1009 NULL, /* set_ptrcnt */
1010};
1011
fcf2db38 1012PerlIO_list_t *
e3f3bf95
NIS
1013PerlIO_default_layers(pTHX)
1014{
3a1ee7e8 1015 if (!PL_def_layerlist) {
14a5cf38
JH
1016 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1017 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 1018 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 1019 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 1020#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 1021 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 1022#if 0
14a5cf38 1023 osLayer = &PerlIO_win32;
0c4128ad 1024#endif
2f8118af 1025#endif
14a5cf38
JH
1026 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1027 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1028 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1029 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 1030#ifdef HAS_MMAP
14a5cf38 1031 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 1032#endif
14a5cf38 1033 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
4ec2216f 1034 PerlIO_define_layer(aTHX_ & PerlIO_remove);
14a5cf38 1035 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 1036 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1037 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1038 &PL_sv_undef);
1039 if (s) {
3a1ee7e8 1040 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1041 }
1042 else {
3a1ee7e8 1043 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1044 }
1141d9f8 1045 }
3a1ee7e8
NIS
1046 if (PL_def_layerlist->cur < 2) {
1047 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1048 }
3a1ee7e8 1049 return PL_def_layerlist;
e3f3bf95
NIS
1050}
1051
0c4f7ff0
NIS
1052void
1053Perl_boot_core_PerlIO(pTHX)
1054{
1055#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1056 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1057 __FILE__);
0c4f7ff0 1058#endif
14a5cf38 1059 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1060 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1061}
e3f3bf95
NIS
1062
1063PerlIO_funcs *
1064PerlIO_default_layer(pTHX_ I32 n)
1065{
14a5cf38
JH
1066 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1067 if (n < 0)
1068 n += av->cur;
1069 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS
1070}
1071
a999f61b
NIS
1072#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1073#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1074
1075void
1141d9f8 1076PerlIO_stdstreams(pTHX)
60382766 1077{
a1ea730d 1078 if (!PL_perlio) {
14a5cf38
JH
1079 PerlIO_allocate(aTHX);
1080 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1081 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1082 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1083 }
60382766
NIS
1084}
1085
1086PerlIO *
14a5cf38
JH
1087PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1088{
2dc2558e
NIS
1089 if (tab->fsize != sizeof(PerlIO_funcs)) {
1090 mismatch:
1091 Perl_croak(aTHX_ "Layer does not match this perl");
1092 }
1093 if (tab->size) {
1094 PerlIOl *l = NULL;
1095 if (tab->size < sizeof(PerlIOl)) {
1096 goto mismatch;
1097 }
1098 /* Real layer with a data area */
1099 Newc('L',l,tab->size,char,PerlIOl);
1100 if (l && f) {
1101 Zero(l, tab->size, char);
1102 l->next = *f;
1103 l->tab = tab;
1104 *f = l;
1105 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1106 (mode) ? mode : "(Null)", (void*)arg);
1107 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1108 PerlIO_pop(aTHX_ f);
1109 return NULL;
1110 }
1111 }
1112 }
1113 else if (f) {
1114 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1115 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1116 (mode) ? mode : "(Null)", (void*)arg);
2dc2558e 1117 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
14a5cf38
JH
1118 return NULL;
1119 }
1120 }
1121 return f;
60382766
NIS
1122}
1123
dfebf958 1124IV
86e05cf2
NIS
1125PerlIOBase_binmode(pTHX_ PerlIO *f)
1126{
1127 if (PerlIOValid(f)) {
1128 /* Is layer suitable for raw stream ? */
1129 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1130 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1131 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1132 }
1133 else {
1134 /* Not suitable - pop it */
1135 PerlIO_pop(aTHX_ f);
1136 }
1137 return 0;
1138 }
1139 return -1;
1140}
1141
1142IV
2dc2558e 1143PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1144{
86e05cf2 1145
04892f78 1146 if (PerlIOValid(f)) {
86e05cf2
NIS
1147 PerlIO *t;
1148 PerlIOl *l;
14a5cf38 1149 PerlIO_flush(f);
86e05cf2
NIS
1150 /*
1151 * Strip all layers that are not suitable for a raw stream
1152 */
1153 t = f;
1154 while (t && (l = *t)) {
1155 if (l->tab->Binmode) {
1156 /* Has a handler - normal case */
1157 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1158 if (*t == l) {
1159 /* Layer still there - move down a layer */
1160 t = PerlIONext(t);
1161 }
1162 }
1163 else {
1164 return -1;
1165 }
14a5cf38
JH
1166 }
1167 else {
86e05cf2
NIS
1168 /* No handler - pop it */
1169 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1170 }
1171 }
86e05cf2
NIS
1172 if (PerlIOValid(f)) {
1173 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1174 return 0;
1175 }
14a5cf38
JH
1176 }
1177 return -1;
dfebf958
NIS
1178}
1179
ac27b0f5 1180int
14a5cf38 1181PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1182 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1183{
14a5cf38
JH
1184 int code = 0;
1185 while (n < max) {
1186 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1187 if (tab) {
1188 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1189 code = -1;
1190 break;
1191 }
1192 }
1193 n++;
1194 }
1195 return code;
e3f3bf95
NIS
1196}
1197
1198int
ac27b0f5
NIS
1199PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1200{
14a5cf38 1201 int code = 0;
53f1b6d2 1202 if (f && names) {
3a1ee7e8 1203 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1204 code = PerlIO_parse_layers(aTHX_ layers, names);
1205 if (code == 0) {
d9dac8cd 1206 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1207 }
3a1ee7e8 1208 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1209 }
14a5cf38 1210 return code;
ac27b0f5
NIS
1211}
1212
f3862f8b 1213
60382766 1214/*--------------------------------------------------------------------------------------*/
14a5cf38 1215/*
71200d45 1216 * Given the abstraction above the public API functions
14a5cf38 1217 */
60382766
NIS
1218
1219int
f5b9d040 1220PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1221{
14a5cf38 1222 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1223 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1224 (names) ? names : "(Null)");
03c0554d
NIS
1225 if (names) {
1226 /* Do not flush etc. if (e.g.) switching encodings.
1227 if a pushed layer knows it needs to flush lower layers
1228 (for example :unix which is never going to call them)
1229 it can do the flush when it is pushed.
1230 */
1231 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1232 }
1233 else {
86e05cf2 1234 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1235#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1236 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1237 O_BINARY so we can look for it in mode.
1238 */
1239 if (!(mode & O_BINARY)) {
1240 /* Text mode */
86e05cf2
NIS
1241 /* FIXME?: Looking down the layer stack seems wrong,
1242 but is a way of reaching past (say) an encoding layer
1243 to flip CRLF-ness of the layer(s) below
1244 */
03c0554d
NIS
1245 while (*f) {
1246 /* Perhaps we should turn on bottom-most aware layer
1247 e.g. Ilya's idea that UNIX TTY could serve
1248 */
1249 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1250 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1251 /* Not in text mode - flush any pending stuff and flip it */
1252 PerlIO_flush(f);
1253 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1254 }
1255 /* Only need to turn it on in one layer so we are done */
1256 return TRUE;
ed53a2bb 1257 }
03c0554d 1258 f = PerlIONext(f);
14a5cf38 1259 }
03c0554d
NIS
1260 /* Not finding a CRLF aware layer presumably means we are binary
1261 which is not what was requested - so we failed
1262 We _could_ push :crlf layer but so could caller
1263 */
1264 return FALSE;
14a5cf38 1265 }
6ce75a77 1266#endif
86e05cf2
NIS
1267 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1268 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1269 */
86e05cf2 1270 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
14a5cf38 1271 }
f5b9d040
NIS
1272}
1273
f5b9d040 1274int
e87a358a 1275PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1276{
04892f78 1277 if (PerlIOValid(f))
f62ce20a 1278 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38 1279 else {
93189314 1280 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1281 return -1;
1282 }
76ced9ad
NIS
1283}
1284
b931b1d9 1285int
e87a358a 1286Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1287{
14a5cf38 1288 int code = -1;
04892f78 1289 if (PerlIOValid(f)) {
f62ce20a 1290 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
14a5cf38
JH
1291 while (*f) {
1292 PerlIO_pop(aTHX_ f);
1293 }
f6c77cf1 1294 }
14a5cf38 1295 return code;
b931b1d9
NIS
1296}
1297
b931b1d9 1298int
e87a358a 1299Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1300{
04892f78 1301 if (PerlIOValid(f))
f62ce20a 1302 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
14a5cf38 1303 else {
93189314 1304 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1305 return -1;
1306 }
b931b1d9
NIS
1307}
1308
1141d9f8
NIS
1309static const char *
1310PerlIO_context_layers(pTHX_ const char *mode)
1311{
14a5cf38
JH
1312 const char *type = NULL;
1313 /*
71200d45 1314 * Need to supply default layer info from open.pm
14a5cf38
JH
1315 */
1316 if (PL_curcop) {
1317 SV *layers = PL_curcop->cop_io;
1318 if (layers) {
1319 STRLEN len;
1320 type = SvPV(layers, len);
1321 if (type && mode[0] != 'r') {
1322 /*
71200d45 1323 * Skip to write part
14a5cf38
JH
1324 */
1325 const char *s = strchr(type, 0);
eb160463 1326 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH
1327 type = s + 1;
1328 }
1329 }
1330 }
1331 }
1332 return type;
1141d9f8
NIS
1333}
1334
fcf2db38 1335static PerlIO_funcs *
2edd7e44
NIS
1336PerlIO_layer_from_ref(pTHX_ SV *sv)
1337{
14a5cf38 1338 /*
71200d45 1339 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH
1340 */
1341 if (SvTYPE(sv) < SVt_PVAV)
e934609f 1342 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
14a5cf38
JH
1343
1344 /*
71200d45 1345 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1346 */
1347 switch (SvTYPE(sv)) {
1348 case SVt_PVAV:
1349 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1350 case SVt_PVHV:
1351 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1352 case SVt_PVCV:
1353 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1354 case SVt_PVGV:
1355 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1356 }
1357 return NULL;
2edd7e44
NIS
1358}
1359
fcf2db38 1360PerlIO_list_t *
14a5cf38
JH
1361PerlIO_resolve_layers(pTHX_ const char *layers,
1362 const char *mode, int narg, SV **args)
1363{
1364 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1365 int incdef = 1;
a1ea730d 1366 if (!PL_perlio)
14a5cf38
JH
1367 PerlIO_stdstreams(aTHX);
1368 if (narg) {
1369 SV *arg = *args;
1370 /*
71200d45
NIS
1371 * If it is a reference but not an object see if we have a handler
1372 * for it
14a5cf38
JH
1373 */
1374 if (SvROK(arg) && !sv_isobject(arg)) {
1375 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1376 if (handler) {
3a1ee7e8
NIS
1377 def = PerlIO_list_alloc(aTHX);
1378 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1379 incdef = 0;
1380 }
1381 /*
e934609f 1382 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1383 * something sensible else we will just stringfy and open
71200d45 1384 * resulting string.
14a5cf38
JH
1385 */
1386 }
1387 }
1388 if (!layers)
1389 layers = PerlIO_context_layers(aTHX_ mode);
1390 if (layers && *layers) {
1391 PerlIO_list_t *av;
1392 if (incdef) {
1393 IV i = def->cur;
3a1ee7e8 1394 av = PerlIO_list_alloc(aTHX);
14a5cf38 1395 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1396 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH
1397 def->array[i].arg);
1398 }
1399 }
1400 else {
1401 av = def;
1402 }
0cff2cf3
NIS
1403 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1404 return av;
1405 }
1406 else {
1407 PerlIO_list_free(aTHX_ av);
1408 return (PerlIO_list_t *) NULL;
1409 }
14a5cf38
JH
1410 }
1411 else {
1412 if (incdef)
1413 def->refcnt++;
1414 return def;
1415 }
ee518936
NIS
1416}
1417
1418PerlIO *
14a5cf38
JH
1419PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1420 int imode, int perm, PerlIO *f, int narg, SV **args)
1421{
1422 if (!f && narg == 1 && *args == &PL_sv_undef) {
1423 if ((f = PerlIO_tmpfile())) {
1424 if (!layers)
1425 layers = PerlIO_context_layers(aTHX_ mode);
1426 if (layers && *layers)
1427 PerlIO_apply_layers(aTHX_ f, mode, layers);
1428 }
1429 }
1430 else {
1431 PerlIO_list_t *layera = NULL;
1432 IV n;
1433 PerlIO_funcs *tab = NULL;
04892f78 1434 if (PerlIOValid(f)) {
14a5cf38 1435 /*
71200d45
NIS
1436 * This is "reopen" - it is not tested as perl does not use it
1437 * yet
14a5cf38
JH
1438 */
1439 PerlIOl *l = *f;
3a1ee7e8 1440 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1441 while (l) {
04892f78
NIS
1442 SV *arg = (l->tab->Getarg)
1443 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1444 : &PL_sv_undef;
3a1ee7e8 1445 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH
1446 l = *PerlIONext(&l);
1447 }
1448 }
1449 else {
1450 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1451 if (!layera) {
1452 return NULL;
1453 }
14a5cf38
JH
1454 }
1455 /*
71200d45 1456 * Start at "top" of layer stack
14a5cf38
JH
1457 */
1458 n = layera->cur - 1;
1459 while (n >= 0) {
1460 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1461 if (t && t->Open) {
1462 tab = t;
1463 break;
1464 }
1465 n--;
1466 }
1467 if (tab) {
1468 /*
71200d45 1469 * Found that layer 'n' can do opens - call it
14a5cf38 1470 */
7cf31beb 1471 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1472 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1473 }
14a5cf38 1474 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH
1475 tab->name, layers, mode, fd, imode, perm,
1476 (void*)f, narg, (void*)args);
14a5cf38
JH
1477 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1478 f, narg, args);
1479 if (f) {
1480 if (n + 1 < layera->cur) {
1481 /*
1482 * More layers above the one that we used to open -
71200d45 1483 * apply them now
14a5cf38 1484 */
d9dac8cd
NIS
1485 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1486 /* If pushing layers fails close the file */
1487 PerlIO_close(f);
14a5cf38
JH
1488 f = NULL;
1489 }
1490 }
1491 }
1492 }
3a1ee7e8 1493 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1494 }
1495 return f;
ee518936 1496}
b931b1d9
NIS
1497
1498
9e353e3b 1499SSize_t
e87a358a 1500Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1501{
04892f78 1502 if (PerlIOValid(f))
f62ce20a 1503 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
14a5cf38 1504 else {
93189314 1505 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1506 return -1;
1507 }
760ac839
LW
1508}
1509
313ca112 1510SSize_t
e87a358a 1511Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1512{
04892f78 1513 if (PerlIOValid(f))
f62ce20a 1514 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
14a5cf38 1515 else {
93189314 1516 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1517 return -1;
1518 }
760ac839
LW
1519}
1520
9e353e3b 1521SSize_t
e87a358a 1522Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1523{
04892f78 1524 if (PerlIOValid(f))
f62ce20a 1525 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
14a5cf38 1526 else {
93189314 1527 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1528 return -1;
1529 }
760ac839
LW
1530}
1531
6f9d8c32 1532int
e87a358a 1533Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1534{
04892f78 1535 if (PerlIOValid(f))
f62ce20a 1536 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
14a5cf38 1537 else {
93189314 1538 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1539 return -1;
1540 }
760ac839
LW
1541}
1542
9e353e3b 1543Off_t
e87a358a 1544Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1545{
04892f78 1546 if (PerlIOValid(f))
f62ce20a 1547 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
14a5cf38 1548 else {
93189314 1549 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1550 return -1;
1551 }
760ac839
LW
1552}
1553
6f9d8c32 1554int
e87a358a 1555Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1556{
14a5cf38
JH
1557 if (f) {
1558 if (*f) {
1559 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1560 if (tab && tab->Flush) {
f62ce20a 1561 return (*tab->Flush) (aTHX_ f);
14a5cf38
JH
1562 }
1563 else {
fe5a182c 1564 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
93189314 1565 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1566 return -1;
1567 }
1568 }
1569 else {
fe5a182c 1570 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1571 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1572 return -1;
1573 }
1574 }
1575 else {
1576 /*
1577 * Is it good API design to do flush-all on NULL, a potentially
1578 * errorneous input? Maybe some magical value (PerlIO*
1579 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1580 * things on fflush(NULL), but should we be bound by their design
71200d45 1581 * decisions? --jhi
14a5cf38 1582 */
a1ea730d 1583 PerlIO **table = &PL_perlio;
14a5cf38
JH
1584 int code = 0;
1585 while ((f = *table)) {
1586 int i;
1587 table = (PerlIO **) (f++);
1588 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1589 if (*f && PerlIO_flush(f) != 0)
1590 code = -1;
1591 f++;
1592 }
1593 }
1594 return code;
1595 }
760ac839
LW
1596}
1597
a9c883f6 1598void
f62ce20a 1599PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1600{
a1ea730d 1601 PerlIO **table = &PL_perlio;
14a5cf38
JH
1602 PerlIO *f;
1603 while ((f = *table)) {
1604 int i;
1605 table = (PerlIO **) (f++);
1606 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1607 if (*f
1608 && (PerlIOBase(f)->
1609 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1610 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1611 PerlIO_flush(f);
1612 f++;
1613 }
a9c883f6 1614 }
a9c883f6
NIS
1615}
1616
06da4f11 1617int
e87a358a 1618Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1619{
04892f78 1620 if (PerlIOValid(f))
f62ce20a 1621 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
14a5cf38 1622 else {
93189314 1623 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1624 return -1;
1625 }
06da4f11
NIS
1626}
1627
f3862f8b
NIS
1628int
1629PerlIO_isutf8(PerlIO *f)
1630{
04892f78 1631 if (PerlIOValid(f))
14a5cf38
JH
1632 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1633 else {
93189314 1634 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1635 return -1;
1636 }
f3862f8b
NIS
1637}
1638
6f9d8c32 1639int
e87a358a 1640Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1641{
04892f78 1642 if (PerlIOValid(f))
f62ce20a 1643 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
14a5cf38 1644 else {
93189314 1645 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1646 return -1;
1647 }
9e353e3b
NIS
1648}
1649
9e353e3b 1650int
e87a358a 1651Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1652{
04892f78 1653 if (PerlIOValid(f))
f62ce20a 1654 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
14a5cf38 1655 else {
93189314 1656 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1657 return -1;
1658 }
9e353e3b
NIS
1659}
1660
9e353e3b 1661void
e87a358a 1662Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1663{
04892f78 1664 if (PerlIOValid(f))
f62ce20a 1665 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
14a5cf38 1666 else
93189314 1667 SETERRNO(EBADF, SS_IVCHAN);
9e353e3b
NIS
1668}
1669
9e353e3b 1670void
e87a358a 1671Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1672{
04892f78 1673 if (PerlIOValid(f))
f62ce20a 1674 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
14a5cf38 1675 else
93189314 1676 SETERRNO(EBADF, SS_IVCHAN);
9e353e3b
NIS
1677}
1678
9e353e3b
NIS
1679int
1680PerlIO_has_base(PerlIO *f)
1681{
04892f78 1682 if (PerlIOValid(f)) {
14a5cf38
JH
1683 return (PerlIOBase(f)->tab->Get_base != NULL);
1684 }
1685 return 0;
760ac839
LW
1686}
1687
9e353e3b
NIS
1688int
1689PerlIO_fast_gets(PerlIO *f)
760ac839 1690{
04892f78 1691 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
14a5cf38
JH
1692 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1693 return (tab->Set_ptrcnt != NULL);
1694 }
1695 return 0;
9e353e3b
NIS
1696}
1697
9e353e3b
NIS
1698int
1699PerlIO_has_cntptr(PerlIO *f)
1700{
04892f78 1701 if (PerlIOValid(f)) {
14a5cf38
JH
1702 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1703 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1704 }
1705 return 0;
9e353e3b
NIS
1706}
1707
9e353e3b
NIS
1708int
1709PerlIO_canset_cnt(PerlIO *f)
1710{
04892f78 1711 if (PerlIOValid(f)) {
14a5cf38
JH
1712 PerlIOl *l = PerlIOBase(f);
1713 return (l->tab->Set_ptrcnt != NULL);
1714 }
1715 return 0;
760ac839
LW
1716}
1717
888911fc 1718STDCHAR *
e87a358a 1719Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1720{
04892f78 1721 if (PerlIOValid(f))
f62ce20a 1722 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
14a5cf38 1723 return NULL;
9e353e3b
NIS
1724}
1725
9e353e3b 1726int
e87a358a 1727Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1728{
04892f78 1729 if (PerlIOValid(f))
f62ce20a 1730 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
14a5cf38 1731 return 0;
9e353e3b
NIS
1732}
1733
9e353e3b 1734STDCHAR *
e87a358a 1735Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1736{
04892f78
NIS
1737 if (PerlIOValid(f)) {
1738 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1739 if (tab->Get_ptr == NULL)
1740 return NULL;
1741 return (*tab->Get_ptr) (aTHX_ f);
1742 }
1743 return NULL;
9e353e3b
NIS
1744}
1745
05d1247b 1746int
e87a358a 1747Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1748{
04892f78
NIS
1749 if (PerlIOValid(f)) {
1750 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1751 if (tab->Get_cnt == NULL)
1752 return 0;
1753 return (*tab->Get_cnt) (aTHX_ f);
1754 }
1755 return 0;
9e353e3b
NIS
1756}
1757
9e353e3b 1758void
e87a358a 1759Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1760{
04892f78
NIS
1761 if (PerlIOValid(f)) {
1762 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1763 }
9e353e3b
NIS
1764}
1765
9e353e3b 1766void
e87a358a 1767Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1768{
04892f78
NIS
1769 if (PerlIOValid(f)) {
1770 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1771 if (tab->Set_ptrcnt == NULL) {
1772 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1773 }
1774 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
14a5cf38 1775 }
9e353e3b
NIS
1776}
1777
4ec2216f 1778
9e353e3b 1779/*--------------------------------------------------------------------------------------*/
14a5cf38 1780/*
71200d45 1781 * utf8 and raw dummy layers
14a5cf38 1782 */
dfebf958 1783
26fb694e 1784IV
2dc2558e 1785PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1786{
00f51856 1787 if (PerlIOValid(f)) {
14a5cf38
JH
1788 if (tab->kind & PERLIO_K_UTF8)
1789 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1790 else
1791 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1792 return 0;
1793 }
1794 return -1;
26fb694e
NIS
1795}
1796
dfebf958 1797PerlIO_funcs PerlIO_utf8 = {
2dc2558e 1798 sizeof(PerlIO_funcs),
14a5cf38 1799 "utf8",
2dc2558e 1800 0,
6874a2de 1801 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1802 PerlIOUtf8_pushed,
1803 NULL,
1804 NULL,
1805 NULL,
1806 NULL,
1807 NULL,
1808 NULL,
1809 NULL,
1810 NULL,
1811 NULL,
1812 NULL,
22569500
NIS
1813 NULL, /* flush */
1814 NULL, /* fill */
14a5cf38
JH
1815 NULL,
1816 NULL,
1817 NULL,
1818 NULL,
22569500
NIS
1819 NULL, /* get_base */
1820 NULL, /* get_bufsiz */
1821 NULL, /* get_ptr */
1822 NULL, /* get_cnt */
1823 NULL, /* set_ptrcnt */
26fb694e
NIS
1824};
1825
1826PerlIO_funcs PerlIO_byte = {
2dc2558e 1827 sizeof(PerlIO_funcs),
14a5cf38 1828 "bytes",
2dc2558e 1829 0,
14a5cf38
JH
1830 PERLIO_K_DUMMY,
1831 PerlIOUtf8_pushed,
1832 NULL,
1833 NULL,
1834 NULL,
1835 NULL,
1836 NULL,
1837 NULL,
1838 NULL,
1839 NULL,
1840 NULL,
1841 NULL,
22569500
NIS
1842 NULL, /* flush */
1843 NULL, /* fill */
14a5cf38
JH
1844 NULL,
1845 NULL,
1846 NULL,
1847 NULL,
22569500
NIS
1848 NULL, /* get_base */
1849 NULL, /* get_bufsiz */
1850 NULL, /* get_ptr */
1851 NULL, /* get_cnt */
1852 NULL, /* set_ptrcnt */
dfebf958
NIS
1853};
1854
1855PerlIO *
14a5cf38
JH
1856PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1857 IV n, const char *mode, int fd, int imode, int perm,
1858 PerlIO *old, int narg, SV **args)
dfebf958 1859{
14a5cf38
JH
1860 PerlIO_funcs *tab = PerlIO_default_btm();
1861 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1862 old, narg, args);
dfebf958
NIS
1863}
1864
1865PerlIO_funcs PerlIO_raw = {
2dc2558e 1866 sizeof(PerlIO_funcs),
14a5cf38 1867 "raw",
2dc2558e 1868 0,
14a5cf38
JH
1869 PERLIO_K_DUMMY,
1870 PerlIORaw_pushed,
1871 PerlIOBase_popped,
1872 PerlIORaw_open,
1873 NULL,
1874 NULL,
1875 NULL,
1876 NULL,
1877 NULL,
1878 NULL,
1879 NULL,
1880 NULL,
22569500
NIS
1881 NULL, /* flush */
1882 NULL, /* fill */
14a5cf38
JH
1883 NULL,
1884 NULL,
1885 NULL,
1886 NULL,
22569500
NIS
1887 NULL, /* get_base */
1888 NULL, /* get_bufsiz */
1889 NULL, /* get_ptr */
1890 NULL, /* get_cnt */
1891 NULL, /* set_ptrcnt */
dfebf958
NIS
1892};
1893/*--------------------------------------------------------------------------------------*/
1894/*--------------------------------------------------------------------------------------*/
14a5cf38 1895/*
71200d45 1896 * "Methods" of the "base class"
14a5cf38 1897 */
9e353e3b
NIS
1898
1899IV
f62ce20a 1900PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1901{
04892f78 1902 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1903}
1904
f5b9d040 1905char *
81428673 1906PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1907{
1908 char *s = buf;
81428673
NIS
1909 if (PerlIOValid(f)) {
1910 IV flags = PerlIOBase(f)->flags;
1911 if (flags & PERLIO_F_APPEND) {
1912 *s++ = 'a';
1913 if (flags & PERLIO_F_CANREAD) {
1914 *s++ = '+';
1915 }
14a5cf38 1916 }
81428673
NIS
1917 else if (flags & PERLIO_F_CANREAD) {
1918 *s++ = 'r';
1919 if (flags & PERLIO_F_CANWRITE)
1920 *s++ = '+';
1921 }
1922 else if (flags & PERLIO_F_CANWRITE) {
1923 *s++ = 'w';
1924 if (flags & PERLIO_F_CANREAD) {
1925 *s++ = '+';
1926 }
14a5cf38 1927 }
35990314 1928#ifdef PERLIO_USING_CRLF
81428673
NIS
1929 if (!(flags & PERLIO_F_CRLF))
1930 *s++ = 'b';
5f1a76d0 1931#endif
81428673 1932 }
14a5cf38
JH
1933 *s = '\0';
1934 return buf;
f5b9d040
NIS
1935}
1936
81428673 1937
76ced9ad 1938IV
2dc2558e 1939PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1940{
14a5cf38 1941 PerlIOl *l = PerlIOBase(f);
b7953727 1942#if 0
14a5cf38
JH
1943 const char *omode = mode;
1944 char temp[8];
b7953727 1945#endif
14a5cf38
JH
1946 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1947 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1948 if (tab->Set_ptrcnt != NULL)
1949 l->flags |= PERLIO_F_FASTGETS;
1950 if (mode) {
1951 if (*mode == '#' || *mode == 'I')
1952 mode++;
1953 switch (*mode++) {
1954 case 'r':
1955 l->flags |= PERLIO_F_CANREAD;
1956 break;
1957 case 'a':
1958 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1959 break;
1960 case 'w':
1961 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1962 break;
1963 default:
93189314 1964 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
1965 return -1;
1966 }
1967 while (*mode) {
1968 switch (*mode++) {
1969 case '+':
1970 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1971 break;
1972 case 'b':
1973 l->flags &= ~PERLIO_F_CRLF;
1974 break;
1975 case 't':
1976 l->flags |= PERLIO_F_CRLF;
1977 break;
1978 default:
93189314 1979 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
1980 return -1;
1981 }
1982 }
1983 }
1984 else {
1985 if (l->next) {
1986 l->flags |= l->next->flags &
1987 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1988 PERLIO_F_APPEND);
1989 }
1990 }
5e2ab84b 1991#if 0
14a5cf38
JH
1992 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1993 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1994 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1995#endif
14a5cf38 1996 return 0;
76ced9ad
NIS
1997}
1998
1999IV
f62ce20a 2000PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2001{
14a5cf38 2002 return 0;
760ac839
LW
2003}
2004
9e353e3b 2005SSize_t
f62ce20a 2006PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2007{
14a5cf38 2008 /*
71200d45 2009 * Save the position as current head considers it
14a5cf38
JH
2010 */
2011 Off_t old = PerlIO_tell(f);
2012 SSize_t done;
2013 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2014 PerlIOSelf(f, PerlIOBuf)->posn = old;
f62ce20a 2015 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38 2016 return done;
9e353e3b
NIS
2017}
2018
f6c77cf1 2019SSize_t
f62ce20a 2020PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2021{
14a5cf38
JH
2022 STDCHAR *buf = (STDCHAR *) vbuf;
2023 if (f) {
2024 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2025 return 0;
2026 while (count > 0) {
2027 SSize_t avail = PerlIO_get_cnt(f);
2028 SSize_t take = 0;
2029 if (avail > 0)
eb160463 2030 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH
2031 if (take > 0) {
2032 STDCHAR *ptr = PerlIO_get_ptr(f);
2033 Copy(ptr, buf, take, STDCHAR);
2034 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2035 count -= take;
2036 buf += take;
2037 }
2038 if (count > 0 && avail <= 0) {
2039 if (PerlIO_fill(f) != 0)
2040 break;
2041 }
2042 }
2043 return (buf - (STDCHAR *) vbuf);
2044 }
f6c77cf1 2045 return 0;
f6c77cf1
NIS
2046}
2047
9e353e3b 2048IV
f62ce20a 2049PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2050{
14a5cf38 2051 return 0;
9e353e3b
NIS
2052}
2053
2054IV
f62ce20a 2055PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2056{
14a5cf38 2057 return -1;
06da4f11
NIS
2058}
2059
2060IV
f62ce20a 2061PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2062{
14a5cf38
JH
2063 IV code = 0;
2064 PerlIO *n = PerlIONext(f);
2065 if (PerlIO_flush(f) != 0)
2066 code = -1;
04892f78 2067 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
14a5cf38
JH
2068 code = -1;
2069 PerlIOBase(f)->flags &=
2070 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2071 return code;
9e353e3b
NIS
2072}
2073
2074IV
f62ce20a 2075PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2076{
04892f78 2077 if (PerlIOValid(f)) {
14a5cf38
JH
2078 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2079 }
2080 return 1;
9e353e3b
NIS
2081}
2082
2083IV
f62ce20a 2084PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2085{
04892f78 2086 if (PerlIOValid(f)) {
14a5cf38
JH
2087 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2088 }
2089 return 1;
9e353e3b
NIS
2090}
2091
2092void
f62ce20a 2093PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2094{
04892f78 2095 if (PerlIOValid(f)) {
14a5cf38
JH
2096 PerlIO *n = PerlIONext(f);
2097 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2098 if (PerlIOValid(n))
14a5cf38
JH
2099 PerlIO_clearerr(n);
2100 }
9e353e3b
NIS
2101}
2102
2103void
f62ce20a 2104PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2105{
04892f78 2106 if (PerlIOValid(f)) {
14a5cf38
JH
2107 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2108 }
9e353e3b
NIS
2109}
2110
93a8090d
NIS
2111SV *
2112PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2113{
2114 if (!arg)
2115 return Nullsv;
2116#ifdef sv_dup
2117 if (param) {
2118 return sv_dup(arg, param);
2119 }
2120 else {
2121 return newSVsv(arg);
2122 }
2123#else
2124 return newSVsv(arg);
2125#endif
2126}
2127
2128PerlIO *
ecdeb87c 2129PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d
NIS
2130{
2131 PerlIO *nexto = PerlIONext(o);
04892f78 2132 if (PerlIOValid(nexto)) {
93a8090d 2133 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
ecdeb87c 2134 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2135 }
2136 if (f) {
2137 PerlIO_funcs *self = PerlIOBase(o)->tab;
2138 SV *arg = Nullsv;
2139 char buf[8];
fe5a182c
JH
2140 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2141 self->name, (void*)f, (void*)o, (void*)param);
93a8090d 2142 if (self->Getarg) {
ecdeb87c 2143 arg = (*self->Getarg)(aTHX_ o,param,flags);
93a8090d
NIS
2144 }
2145 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2146 if (arg) {
93a8090d
NIS
2147 SvREFCNT_dec(arg);
2148 }
2149 }
2150 return f;
2151}
2152
2153#define PERLIO_MAX_REFCOUNTABLE_FD 2048
168d5872 2154#ifdef USE_THREADS
93a8090d 2155perl_mutex PerlIO_mutex;
93a8090d 2156#endif
168d5872 2157int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
93a8090d
NIS
2158
2159void
2160PerlIO_init(pTHX)
2161{
2162 /* Place holder for stdstreams call ??? */
168d5872 2163#ifdef USE_THREADS
93a8090d
NIS
2164 MUTEX_INIT(&PerlIO_mutex);
2165#endif
2166}
2167
168d5872
NIS
2168void
2169PerlIOUnix_refcnt_inc(int fd)
2170{
2171 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2172#ifdef USE_THREADS
2173 MUTEX_LOCK(&PerlIO_mutex);
2174#endif
2175 PerlIO_fd_refcnt[fd]++;
2176 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2177#ifdef USE_THREADS
2178 MUTEX_UNLOCK(&PerlIO_mutex);
2179#endif
2180 }
2181}
2182
168d5872
NIS
2183int
2184PerlIOUnix_refcnt_dec(int fd)
2185{
2186 int cnt = 0;
2187 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2188#ifdef USE_THREADS
2189 MUTEX_LOCK(&PerlIO_mutex);
2190#endif
2191 cnt = --PerlIO_fd_refcnt[fd];
2192 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2193#ifdef USE_THREADS
2194 MUTEX_UNLOCK(&PerlIO_mutex);
2195#endif
2196 }
2197 return cnt;
2198}
2199
694c95cf
JH
2200void
2201PerlIO_cleanup(pTHX)
2202{
2203 int i;
2204#ifdef USE_ITHREADS
9f4bd222
NIS
2205 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2206#else
2207 PerlIO_debug("Cleanup layers\n");
694c95cf
JH
2208#endif
2209 /* Raise STDIN..STDERR refcount so we don't close them */
2210 for (i=0; i < 3; i++)
2211 PerlIOUnix_refcnt_inc(i);
2212 PerlIO_cleantable(aTHX_ &PL_perlio);
2213 /* Restore STDIN..STDERR refcount */
2214 for (i=0; i < 3; i++)
2215 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2216
2217 if (PL_known_layers) {
2218 PerlIO_list_free(aTHX_ PL_known_layers);
2219 PL_known_layers = NULL;
2220 }
2221 if(PL_def_layerlist) {
2222 PerlIO_list_free(aTHX_ PL_def_layerlist);
2223 PL_def_layerlist = NULL;
2224 }
694c95cf
JH
2225}
2226
2227
2228
9e353e3b 2229/*--------------------------------------------------------------------------------------*/
14a5cf38 2230/*
71200d45 2231 * Bottom-most level for UNIX-like case
14a5cf38 2232 */
9e353e3b 2233
14a5cf38 2234typedef struct {
22569500
NIS
2235 struct _PerlIO base; /* The generic part */
2236 int fd; /* UNIX like file descriptor */
2237 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2238} PerlIOUnix;
2239
6f9d8c32 2240int
9e353e3b 2241PerlIOUnix_oflags(const char *mode)
760ac839 2242{
14a5cf38
JH
2243 int oflags = -1;
2244 if (*mode == 'I' || *mode == '#')
2245 mode++;
2246 switch (*mode) {
2247 case 'r':
2248 oflags = O_RDONLY;
2249 if (*++mode == '+') {
2250 oflags = O_RDWR;
2251 mode++;
2252 }
2253 break;
2254
2255 case 'w':
2256 oflags = O_CREAT | O_TRUNC;
2257 if (*++mode == '+') {
2258 oflags |= O_RDWR;
2259 mode++;
2260 }
2261 else
2262 oflags |= O_WRONLY;
2263 break;
2264
2265 case 'a':
2266 oflags = O_CREAT | O_APPEND;
2267 if (*++mode == '+') {
2268 oflags |= O_RDWR;
2269 mode++;
2270 }
2271 else
2272 oflags |= O_WRONLY;
2273 break;
2274 }
2275 if (*mode == 'b') {
2276 oflags |= O_BINARY;
2277 oflags &= ~O_TEXT;
2278 mode++;
2279 }
2280 else if (*mode == 't') {
2281 oflags |= O_TEXT;
2282 oflags &= ~O_BINARY;
2283 mode++;
2284 }
2285 /*
71200d45 2286 * Always open in binary mode
14a5cf38
JH
2287 */
2288 oflags |= O_BINARY;
2289 if (*mode || oflags == -1) {
93189314 2290 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2291 oflags = -1;
2292 }
2293 return oflags;
9e353e3b
NIS
2294}
2295
2296IV
f62ce20a 2297PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2298{
14a5cf38 2299 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2300}
2301
4b803d04 2302IV
2dc2558e 2303PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2304{
2dc2558e 2305 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
93a8090d 2306 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2307 if (*PerlIONext(f)) {
4b069b44 2308 /* We never call down so do any pending stuff now */
03c0554d 2309 PerlIO_flush(PerlIONext(f));
14a5cf38
JH
2310 s->fd = PerlIO_fileno(PerlIONext(f));
2311 /*
71200d45 2312 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2313 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2314 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH
2315 */
2316 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2317 }
2318 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2319 return code;
4b803d04
NIS
2320}
2321
9e353e3b 2322PerlIO *
14a5cf38
JH
2323PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2324 IV n, const char *mode, int fd, int imode,
2325 int perm, PerlIO *f, int narg, SV **args)
2326{
d9dac8cd 2327 if (PerlIOValid(f)) {
14a5cf38 2328 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2329 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2330 }
2331 if (narg > 0) {
2332 char *path = SvPV_nolen(*args);
2333 if (*mode == '#')
2334 mode++;
2335 else {
2336 imode = PerlIOUnix_oflags(mode);
2337 perm = 0666;
2338 }
2339 if (imode != -1) {
2340 fd = PerlLIO_open3(path, imode, perm);
2341 }
2342 }
2343 if (fd >= 0) {
2344 PerlIOUnix *s;
2345 if (*mode == 'I')
2346 mode++;
2347 if (!f) {
2348 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2349 }
2350 if (!PerlIOValid(f)) {
a33cf58c
NIS
2351 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2352 return NULL;
2353 }
d9dac8cd 2354 }
a33cf58c 2355 s = PerlIOSelf(f, PerlIOUnix);
14a5cf38
JH
2356 s->fd = fd;
2357 s->oflags = imode;
2358 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
22569500 2359 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH
2360 return f;
2361 }
2362 else {
2363 if (f) {
2364 /*
71200d45 2365 * FIXME: pop layers ???
14a5cf38
JH
2366 */
2367 }
2368 return NULL;
2369 }
9e353e3b
NIS
2370}
2371
71200d45 2372PerlIO *
ecdeb87c 2373PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS
2374{
2375 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2376 int fd = os->fd;
ecdeb87c
NIS
2377 if (flags & PERLIO_DUP_FD) {
2378 fd = PerlLIO_dup(fd);
2379 }
93a8090d 2380 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2381 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2382 if (f) {
2383 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2384 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2385 s->fd = fd;
93a8090d 2386 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS
2387 return f;
2388 }
71200d45
NIS
2389 }
2390 return NULL;
2391}
2392
2393
9e353e3b 2394SSize_t
f62ce20a 2395PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2396{
14a5cf38 2397 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
81428673 2398 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2399 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
14a5cf38 2400 return 0;
1fd8f4ce 2401 }
14a5cf38
JH
2402 while (1) {
2403 SSize_t len = PerlLIO_read(fd, vbuf, count);
2404 if (len >= 0 || errno != EINTR) {
2405 if (len < 0)
2406 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2407 else if (len == 0 && count != 0)
2408 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2409 return len;
2410 }
2411 PERL_ASYNC_CHECK();
2412 }
9e353e3b
NIS
2413}
2414
2415SSize_t
f62ce20a 2416PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2417{
14a5cf38
JH
2418 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2419 while (1) {
2420 SSize_t len = PerlLIO_write(fd, vbuf, count);
2421 if (len >= 0 || errno != EINTR) {
2422 if (len < 0)
2423 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2424 return len;
2425 }
2426 PERL_ASYNC_CHECK();
06da4f11 2427 }
9e353e3b
NIS
2428}
2429
2430IV
f62ce20a 2431PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2432{
14a5cf38
JH
2433 Off_t new =
2434 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2435 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2436 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS
2437}
2438
2439Off_t
f62ce20a 2440PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2441{
14a5cf38 2442 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2443}
2444
71200d45 2445
9e353e3b 2446IV
f62ce20a 2447PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2448{
14a5cf38
JH
2449 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2450 int code = 0;
168d5872
NIS
2451 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2452 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2453 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2454 return 0;
22569500 2455 }
93a8090d
NIS
2456 }
2457 else {
93189314 2458 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2459 return -1;
2460 }
14a5cf38
JH
2461 while (PerlLIO_close(fd) != 0) {
2462 if (errno != EINTR) {
2463 code = -1;
2464 break;
2465 }
2466 PERL_ASYNC_CHECK();
2467 }
2468 if (code == 0) {
2469 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2470 }
2471 return code;
9e353e3b
NIS
2472}
2473
2474PerlIO_funcs PerlIO_unix = {
2dc2558e 2475 sizeof(PerlIO_funcs),
14a5cf38
JH
2476 "unix",
2477 sizeof(PerlIOUnix),
2478 PERLIO_K_RAW,
2479 PerlIOUnix_pushed,
44798d05 2480 PerlIOBase_popped,
14a5cf38 2481 PerlIOUnix_open,
86e05cf2 2482 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2483 NULL,
2484 PerlIOUnix_fileno,
71200d45 2485 PerlIOUnix_dup,
14a5cf38
JH
2486 PerlIOUnix_read,
2487 PerlIOBase_unread,
2488 PerlIOUnix_write,
2489 PerlIOUnix_seek,
2490 PerlIOUnix_tell,
2491 PerlIOUnix_close,
22569500
NIS
2492 PerlIOBase_noop_ok, /* flush */
2493 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2494 PerlIOBase_eof,
2495 PerlIOBase_error,
2496 PerlIOBase_clearerr,
2497 PerlIOBase_setlinebuf,
22569500
NIS
2498 NULL, /* get_base */
2499 NULL, /* get_bufsiz */
2500 NULL, /* get_ptr */
2501 NULL, /* get_cnt */
2502 NULL, /* set_ptrcnt */
9e353e3b
NIS
2503};
2504
2505/*--------------------------------------------------------------------------------------*/
14a5cf38 2506/*
71200d45 2507 * stdio as a layer
14a5cf38 2508 */
9e353e3b 2509
313e59c8
NIS
2510#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2511/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2512 broken by the last second glibc 2.3 fix
2513 */
2514#define STDIO_BUFFER_WRITABLE
2515#endif
2516
2517
14a5cf38
JH
2518typedef struct {
2519 struct _PerlIO base;
22569500 2520 FILE *stdio; /* The stream */
9e353e3b
NIS
2521} PerlIOStdio;
2522
2523IV
f62ce20a 2524PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2525{
439ba545 2526 FILE *s;
81428673 2527 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
439ba545
NIS
2528 return PerlSIO_fileno(s);
2529 }
2530 errno = EBADF;
2531 return -1;
9e353e3b
NIS
2532}
2533
766a733e 2534char *
14a5cf38
JH
2535PerlIOStdio_mode(const char *mode, char *tmode)
2536{
2537 char *ret = tmode;
2538 while (*mode) {
2539 *tmode++ = *mode++;
2540 }
35990314 2541#ifdef PERLIO_USING_CRLF
6ce75a77
JH
2542 *tmode++ = 'b';
2543#endif
14a5cf38
JH
2544 *tmode = '\0';
2545 return ret;
2546}
2547
4b803d04 2548IV
2dc2558e 2549PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2550{
1fd8f4ce
NIS
2551 PerlIO *n;
2552 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2553 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2554 if (toptab == tab) {
2555 /* Top is already stdio - pop self (duplicate) and use original */
2556 PerlIO_pop(aTHX_ f);
2557 return 0;
2558 } else {
2559 int fd = PerlIO_fileno(n);
2560 char tmode[8];
2561 FILE *stdio;
81428673 2562 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2563 mode = PerlIOStdio_mode(mode, tmode)))) {
2564 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2565 /* We never call down so do any pending stuff now */
2566 PerlIO_flush(PerlIONext(f));
81428673 2567 }
1fd8f4ce
NIS
2568 else {
2569 return -1;
2570 }
2571 }
14a5cf38 2572 }
2dc2558e 2573 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2574}
2575
22569500 2576
9e353e3b 2577PerlIO *
4b069b44 2578PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2579{
14a5cf38
JH
2580 dTHX;
2581 PerlIO *f = NULL;
2582 if (stdio) {
22569500 2583 PerlIOStdio *s;
4b069b44
NIS
2584 if (!mode || !*mode) {
2585 /* We need to probe to see how we can open the stream
2586 so start with read/write and then try write and read
2587 we dup() so that we can fclose without loosing the fd.
2588
2589 Note that the errno value set by a failing fdopen
2590 varies between stdio implementations.
2591 */
2592 int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2593 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2594 if (!f2) {
a33cf58c 2595 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2596 }
2597 if (!f2) {
a33cf58c 2598 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2599 }
2600 if (!f2) {
2601 /* Don't seem to be able to open */
2602 PerlLIO_close(fd);
2603 return f;
2604 }
2605 fclose(f2);
22569500 2606 }
a33cf58c
NIS
2607 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2608 s = PerlIOSelf(f, PerlIOStdio);
2609 s->stdio = stdio;
2610 }
14a5cf38
JH
2611 }
2612 return f;
9e353e3b
NIS
2613}
2614
2615PerlIO *
14a5cf38
JH
2616PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2617 IV n, const char *mode, int fd, int imode,
2618 int perm, PerlIO *f, int narg, SV **args)
2619{
2620 char tmode[8];
d9dac8cd 2621 if (PerlIOValid(f)) {
14a5cf38
JH
2622 char *path = SvPV_nolen(*args);
2623 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2624 FILE *stdio;
2625 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2626 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2627 s->stdio);
2628 if (!s->stdio)
2629 return NULL;
2630 s->stdio = stdio;
1751d015 2631 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2632 return f;
2633 }
2634 else {
2635 if (narg > 0) {
2636 char *path = SvPV_nolen(*args);
2637 if (*mode == '#') {
2638 mode++;
2639 fd = PerlLIO_open3(path, imode, perm);
2640 }
2641 else {
2642 FILE *stdio = PerlSIO_fopen(path, mode);
2643 if (stdio) {
d9dac8cd
NIS
2644 PerlIOStdio *s;
2645 if (!f) {
2646 f = PerlIO_allocate(aTHX);
2647 }
a33cf58c 2648 if ((f = PerlIO_push(aTHX_ f, self,
14a5cf38 2649 (mode = PerlIOStdio_mode(mode, tmode)),
a33cf58c
NIS
2650 PerlIOArg))) {
2651 s = PerlIOSelf(f, PerlIOStdio);
2652 s->stdio = stdio;
2653 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2654 }
602c3c4b
NIS
2655 return f;
2656 }
2657 else {
2658 return NULL;
14a5cf38 2659 }
14a5cf38
JH
2660 }
2661 }
2662 if (fd >= 0) {
2663 FILE *stdio = NULL;
2664 int init = 0;
2665 if (*mode == 'I') {
2666 init = 1;
2667 mode++;
2668 }
2669 if (init) {
2670 switch (fd) {
2671 case 0:
2672 stdio = PerlSIO_stdin;
2673 break;
2674 case 1:
2675 stdio = PerlSIO_stdout;
2676 break;
2677 case 2:
2678 stdio = PerlSIO_stderr;
2679 break;
2680 }
2681 }
2682 else {
2683 stdio = PerlSIO_fdopen(fd, mode =
2684 PerlIOStdio_mode(mode, tmode));
2685 }
2686 if (stdio) {
d9dac8cd
NIS
2687 PerlIOStdio *s;
2688 if (!f) {
2689 f = PerlIO_allocate(aTHX);
2690 }
a33cf58c
NIS
2691 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2692 s = PerlIOSelf(f, PerlIOStdio);
2693 s->stdio = stdio;
2694 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2695 }
14a5cf38
JH
2696 return f;
2697 }
2698 }
2699 }
ee518936 2700 return NULL;
9e353e3b
NIS
2701}
2702
1751d015 2703PerlIO *
ecdeb87c 2704PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2705{
2706 /* This assumes no layers underneath - which is what
2707 happens, but is not how I remember it. NI-S 2001/10/16
2708 */
ecdeb87c 2709 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2710 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
9217ff3f
NIS
2711 int fd = fileno(stdio);
2712 char mode[8];
ecdeb87c 2713 if (flags & PERLIO_DUP_FD) {
9217ff3f
NIS
2714 int dfd = PerlLIO_dup(fileno(stdio));
2715 if (dfd >= 0) {
2716 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2717 goto set_this;
ecdeb87c
NIS
2718 }
2719 else {
2720 /* FIXME: To avoid messy error recovery if dup fails
2721 re-use the existing stdio as though flag was not set
2722 */
2723 }
2724 }
9217ff3f
NIS
2725 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2726 set_this:
694c95cf
JH
2727 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2728 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
2729 }
2730 return f;
2731}
2732
0d7a5398
NIS
2733static int
2734PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2735{
2736 /* XXX this could use PerlIO_canset_fileno() and
2737 * PerlIO_set_fileno() support from Configure
2738 */
2739# if defined(__GLIBC__)
2740 /* There may be a better way for GLIBC:
2741 - libio.h defines a flag to not close() on cleanup
2742 */
2743 f->_fileno = -1;
2744 return 1;
2745# elif defined(__sun__)
2746# if defined(_LP64)
2747 /* On solaris, if _LP64 is defined, the FILE structure is this:
2748 *
2749 * struct FILE {
2750 * long __pad[16];
2751 * };
2752 *
2753 * It turns out that the fd is stored in the top 32 bits of
2754 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2755 * to contain a pointer or offset into another structure. All the
2756 * remaining fields are zero.
2757 *
2758 * We set the top bits to -1 (0xFFFFFFFF).
2759 */
2760 f->__pad[4] |= 0xffffffff00000000L;
2761 assert(fileno(f) == 0xffffffff);
2762# else /* !defined(_LP64) */
2763 /* _file is just a unsigned char :-(
2764 Not clear why we dup() rather than using -1
2765 even if that would be treated as 0xFF - so will
2766 a dup fail ...
2767 */
673c27c1 2768 f->_file = PerlLIO_dup(fileno(f));
0d7a5398
NIS
2769# endif /* defined(_LP64) */
2770 return 1;
2771# elif defined(__hpux)
2772 f->__fileH = 0xff;
2773 f->__fileL = 0xff;
2774 return 1;
9837d373
NIS
2775 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2776 your platform does not have special entry try this one.
2777 [For OSF only have confirmation for Tru64 (alpha)
2778 but assume other OSFs will be similar.]
9110aad0 2779 */
9837d373 2780# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
2781 f->_file = -1;
2782 return 1;
2783# elif defined(__FreeBSD__)
2784 /* There may be a better way on FreeBSD:
2785 - we could insert a dummy func in the _close function entry
2786 f->_close = (int (*)(void *)) dummy_close;
2787 */
2788 f->_file = -1;
2789 return 1;
2790# elif defined(__CYGWIN__)
2791 /* There may be a better way on CYGWIN:
2792 - we could insert a dummy func in the _close function entry
2793 f->_close = (int (*)(void *)) dummy_close;
2794 */
2795 f->_file = -1;
2796 return 1;
2797# elif defined(WIN32)
2798# if defined(__BORLANDC__)
2799 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
2800# elif defined(UNDER_CE)
2801 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2802 structure at all
2803 */
0d7a5398
NIS
2804# else
2805 f->_file = -1;
2806# endif
2807 return 1;
2808# else
2809#if 0
2810 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2811 (which isn't thread safe) instead
2812 */
2813# error "Don't know how to set FILE.fileno on your platform"
2814#endif
2815 return 0;
2816# endif
2817}
2818
1751d015 2819IV
f62ce20a 2820PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2821{
1751d015 2822 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
2823 if (!stdio) {
2824 errno = EBADF;
2825 return -1;
2826 }
9217ff3f
NIS
2827 else {
2828 int fd = fileno(stdio);
0d7a5398
NIS
2829 int socksfd = 0;
2830 int invalidate = 0;
bbfd922f 2831 IV result = 0;
0d7a5398
NIS
2832 int saveerr = 0;
2833 int dupfd = 0;
2834#ifdef SOCKS5_VERSION_NAME
2835 /* Socks lib overrides close() but stdio isn't linked to
2836 that library (though we are) - so we must call close()
2837 on sockets on stdio's behalf.
2838 */
2839 int optval;
2840 Sock_size_t optlen = sizeof(int);
2841 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2842 socksfd = 1;
2843 invalidate = 1;
2844 }
2845#endif
9217ff3f
NIS
2846 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2847 /* File descriptor still in use */
0d7a5398
NIS
2848 invalidate = 1;
2849 socksfd = 0;
2850 }
2851 if (invalidate) {
2852 /* For STD* handles don't close the stdio at all
2853 this is because we have shared the FILE * too
2854 */
2855 if (stdio == stdin) {
2856 /* Some stdios are buggy fflush-ing inputs */
2857 return 0;
2858 }
2859 else if (stdio == stdout || stdio == stderr) {
9217ff3f
NIS
2860 return PerlIO_flush(f);
2861 }
0d7a5398
NIS
2862 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2863 Use Sarathy's trick from maint-5.6 to invalidate the
2864 fileno slot of the FILE *
2865 */
bbfd922f 2866 result = PerlIO_flush(f);
0d7a5398
NIS
2867 saveerr = errno;
2868 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
9217ff3f
NIS
2869 dupfd = PerlLIO_dup(fd);
2870 }
0d7a5398
NIS
2871 }
2872 result = PerlSIO_fclose(stdio);
e8529473
NIS
2873 /* We treat error from stdio as success if we invalidated
2874 errno may NOT be expected EBADF
2875 */
2876 if (invalidate && result != 0) {
0d7a5398
NIS
2877 errno = saveerr;
2878 result = 0;
2879 }
2880 if (socksfd) {
2881 /* in SOCKS case let close() determine return value */
2882 result = close(fd);
2883 }
2884 if (dupfd) {
2885 PerlLIO_dup2(dupfd,fd);
2886 close(dupfd);
9217ff3f
NIS
2887 }
2888 return result;
2889 }
1751d015
NIS
2890}
2891
9e353e3b 2892SSize_t
f62ce20a 2893PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2894{
14a5cf38
JH
2895 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2896 SSize_t got = 0;
4d948241
NIS
2897 for (;;) {
2898 if (count == 1) {
2899 STDCHAR *buf = (STDCHAR *) vbuf;
2900 /*
2901 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2902 * stdio does not do that for fread()
2903 */
2904 int ch = PerlSIO_fgetc(s);
2905 if (ch != EOF) {
2906 *buf = ch;
2907 got = 1;
2908 }
14a5cf38 2909 }
4d948241
NIS
2910 else
2911 got = PerlSIO_fread(vbuf, 1, count, s);
2912 if (got || errno != EINTR)
2913 break;
2914 PERL_ASYNC_CHECK();
2915 errno = 0; /* just in case */
14a5cf38 2916 }
14a5cf38 2917 return got;
9e353e3b
NIS
2918}
2919
2920SSize_t
f62ce20a 2921PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2922{
14a5cf38 2923 SSize_t unread = 0;
93679785
NIS
2924 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2925
313e59c8 2926#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 2927 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
2928 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2929 STDCHAR *base = PerlIO_get_base(f);
2930 SSize_t cnt = PerlIO_get_cnt(f);
2931 STDCHAR *ptr = PerlIO_get_ptr(f);
2932 SSize_t avail = ptr - base;
2933 if (avail > 0) {
2934 if (avail > count) {
2935 avail = count;
2936 }
2937 ptr -= avail;
2938 Move(buf-avail,ptr,avail,STDCHAR);
2939 count -= avail;
2940 unread += avail;
2941 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
2942 if (PerlSIO_feof(s) && unread >= 0)
2943 PerlSIO_clearerr(s);
2944 }
2945 }
313e59c8
NIS
2946 else
2947#endif
2948 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
2949 /* We can get pointer to buffer but not its base
2950 Do ungetc() but check chars are ending up in the
2951 buffer
2952 */
2953 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2954 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2955 while (count > 0) {
2956 int ch = *--buf & 0xFF;
2957 if (ungetc(ch,s) != ch) {
2958 /* ungetc did not work */
2959 break;
2960 }
2961 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2962 /* Did not change pointer as expected */
2963 fgetc(s); /* get char back again */
2964 break;
2965 }
2966 /* It worked ! */
2967 count--;
2968 unread++;
93679785
NIS
2969 }
2970 }
2971
2972 if (count > 0) {
2973 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
2974 }
2975 return unread;
9e353e3b
NIS
2976}
2977
2978SSize_t
f62ce20a 2979PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2980{
4d948241
NIS
2981 SSize_t got;
2982 for (;;) {
2983 got = PerlSIO_fwrite(vbuf, 1, count,
2984 PerlIOSelf(f, PerlIOStdio)->stdio);
2985 if (got || errno != EINTR)
2986 break;
2987 PERL_ASYNC_CHECK();
2988 errno = 0; /* just in case */
2989 }
2990 return got;
9e353e3b
NIS
2991}
2992
2993IV
f62ce20a 2994PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 2995{
14a5cf38
JH
2996 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2997 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
2998}
2999
3000Off_t
f62ce20a 3001PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3002{
14a5cf38
JH
3003 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3004 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3005}
3006
3007IV
f62ce20a 3008PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3009{
14a5cf38
JH
3010 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3011 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3012 return PerlSIO_fflush(stdio);
3013 }
3014 else {
88b61e10 3015#if 0
14a5cf38
JH
3016 /*
3017 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3018 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3019 * design is to do _this_ but not have layer above flush this
71200d45 3020 * layer read-to-read
14a5cf38
JH
3021 */
3022 /*
71200d45 3023 * Not writeable - sync by attempting a seek
14a5cf38
JH
3024 */
3025 int err = errno;
3026 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3027 errno = err;
88b61e10 3028#endif
14a5cf38
JH
3029 }
3030 return 0;
9e353e3b
NIS
3031}
3032
3033IV
f62ce20a 3034PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3035{
14a5cf38 3036 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3037}
3038
3039IV
f62ce20a 3040PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3041{
14a5cf38 3042 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3043}
3044
3045void
f62ce20a 3046PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3047{
14a5cf38 3048 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3049}
3050
3051void
f62ce20a 3052PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS
3053{
3054#ifdef HAS_SETLINEBUF
14a5cf38 3055 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3056#else
14a5cf38 3057 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS
3058#endif
3059}
3060
3061#ifdef FILE_base
3062STDCHAR *
f62ce20a 3063PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3064{
14a5cf38 3065 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3066 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3067}
3068
3069Size_t
f62ce20a 3070PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3071{
14a5cf38
JH
3072 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3073 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3074}
3075#endif
3076
3077#ifdef USE_STDIO_PTR
3078STDCHAR *
f62ce20a 3079PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3080{
14a5cf38 3081 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3082 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3083}
3084
3085SSize_t
f62ce20a 3086PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3087{
14a5cf38
JH
3088 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3089 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3090}
3091
3092void
f62ce20a 3093PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3094{
14a5cf38 3095 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3096 if (ptr != NULL) {
9e353e3b 3097#ifdef STDIO_PTR_LVALUE
22569500 3098 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3099#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3100 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3101 assert(PerlSIO_get_cnt(stdio) == (cnt));
3102 }
9e353e3b
NIS
3103#endif
3104#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3105 /*
71200d45 3106 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3107 */
3108 return;
9e353e3b 3109#endif
22569500 3110#else /* STDIO_PTR_LVALUE */
14a5cf38 3111 PerlProc_abort();
22569500 3112#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3113 }
3114 /*
71200d45 3115 * Now (or only) set cnt
14a5cf38 3116 */
9e353e3b 3117#ifdef STDIO_CNT_LVALUE
14a5cf38 3118 PerlSIO_set_cnt(stdio, cnt);
22569500 3119#else /* STDIO_CNT_LVALUE */
9e353e3b 3120#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3121 PerlSIO_set_ptr(stdio,
3122 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3123 cnt));
22569500 3124#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3125 PerlProc_abort();
22569500
NIS
3126#endif /* STDIO_PTR_LVAL_SETS_CNT */
3127#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3128}
3129
93679785 3130
9e353e3b
NIS
3131#endif
3132
93679785
NIS
3133IV
3134PerlIOStdio_fill(pTHX_ PerlIO *f)
3135{
3136 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3137 int c;
3138 /*
3139 * fflush()ing read-only streams can cause trouble on some stdio-s
3140 */
3141 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3142 if (PerlSIO_fflush(stdio) != 0)
3143 return EOF;
3144 }
3145 c = PerlSIO_fgetc(stdio);
3146 if (c == EOF)
3147 return EOF;
3148
3149#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3150
3151#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3152 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3153 /* Fake ungetc() to the real buffer in case system's ungetc
3154 goes elsewhere
3155 */
3156 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3157 SSize_t cnt = PerlSIO_get_cnt(stdio);
3158 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3159 if (ptr == base+1) {
3160 *--ptr = (STDCHAR) c;
3161 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3162 if (PerlSIO_feof(stdio))
3163 PerlSIO_clearerr(stdio);
3164 return 0;
3165 }
3166 }
313e59c8
NIS
3167 else
3168#endif
3169 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3170 STDCHAR ch = c;
3171 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3172 return 0;
3173 }
3174 }
93679785
NIS
3175#endif
3176
3177#if defined(VMS)
3178 /* An ungetc()d char is handled separately from the regular
3179 * buffer, so we stuff it in the buffer ourselves.
3180 * Should never get called as should hit code above
3181 */
bad9695d
NIS
3182 *(--((*stdio)->_ptr)) = (unsigned char) c;
3183 (*stdio)->_cnt++;
93679785
NIS
3184#else
3185 /* If buffer snoop scheme above fails fall back to
9f7cd136 3186 using ungetc().
93679785
NIS
3187 */
3188 if (PerlSIO_ungetc(c, stdio) != c)
3189 return EOF;
3190#endif
3191 return 0;
3192}
3193
3194
3195
9e353e3b 3196PerlIO_funcs PerlIO_stdio = {
2dc2558e 3197 sizeof(PerlIO_funcs),
14a5cf38
JH
3198 "stdio",
3199 sizeof(PerlIOStdio),
86e05cf2 3200 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3201 PerlIOStdio_pushed,
44798d05 3202 PerlIOBase_popped,
14a5cf38 3203 PerlIOStdio_open,
86e05cf2 3204 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3205 NULL,
3206 PerlIOStdio_fileno,
71200d45 3207 PerlIOStdio_dup,
14a5cf38
JH
3208 PerlIOStdio_read,
3209 PerlIOStdio_unread,
3210 PerlIOStdio_write,
3211 PerlIOStdio_seek,
3212 PerlIOStdio_tell,
3213 PerlIOStdio_close,
3214 PerlIOStdio_flush,
3215 PerlIOStdio_fill,
3216 PerlIOStdio_eof,
3217 PerlIOStdio_error,
3218 PerlIOStdio_clearerr,
3219 PerlIOStdio_setlinebuf,
9e353e3b 3220#ifdef FILE_base
14a5cf38
JH
3221 PerlIOStdio_get_base,
3222 PerlIOStdio_get_bufsiz,
9e353e3b 3223#else
14a5cf38
JH
3224 NULL,
3225 NULL,
9e353e3b
NIS
3226#endif
3227#ifdef USE_STDIO_PTR
14a5cf38
JH
3228 PerlIOStdio_get_ptr,
3229 PerlIOStdio_get_cnt,
15b61c98 3230# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3231 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3232# else
3233 NULL,
3234# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3235#else
3236 NULL,
14a5cf38
JH
3237 NULL,
3238 NULL,
15b61c98 3239#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3240};
3241
b9d6bf13
JH
3242/* Note that calls to PerlIO_exportFILE() are reversed using
3243 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3244FILE *
81428673 3245PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3246{
e87a358a 3247 dTHX;
81428673
NIS
3248 FILE *stdio = NULL;
3249 if (PerlIOValid(f)) {
3250 char buf[8];
3251 PerlIO_flush(f);
3252 if (!mode || !*mode) {
3253 mode = PerlIO_modestr(f, buf);
3254 }
3255 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3256 if (stdio) {
3257 PerlIOl *l = *f;
3258 /* De-link any lower layers so new :stdio sticks */
3259 *f = NULL;
3260 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3261 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3262 s->stdio = stdio;
3263 /* Link previous lower layers under new one */
3264 *PerlIONext(f) = l;
3265 }
3266 else {
3267 /* restore layers list */
3268 *f = l;
3269 }
a33cf58c 3270 }
14a5cf38
JH
3271 }
3272 return stdio;
9e353e3b
NIS
3273}
3274
81428673 3275
9e353e3b
NIS
3276FILE *
3277PerlIO_findFILE(PerlIO *f)
3278{
14a5cf38
JH
3279 PerlIOl *l = *f;
3280 while (l) {
3281 if (l->tab == &PerlIO_stdio) {
3282 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3283 return s->stdio;
3284 }
3285 l = *PerlIONext(&l);
f7e7eb72 3286 }
4b069b44
NIS
3287 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3288 return PerlIO_exportFILE(f, Nullch);
9e353e3b
NIS
3289}
3290
b9d6bf13 3291/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3292void
3293PerlIO_releaseFILE(PerlIO *p, FILE *f)
3294{
22569500
NIS
3295 PerlIOl *l;
3296 while ((l = *p)) {
3297 if (l->tab == &PerlIO_stdio) {
3298 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3299 if (s->stdio == f) {
3300 dTHX;
3301 PerlIO_pop(aTHX_ p);
3302 return;
3303 }
3304 }
3305 p = PerlIONext(p);
3306 }
3307 return;
9e353e3b
NIS
3308}
3309
3310/*--------------------------------------------------------------------------------------*/
14a5cf38 3311/*
71200d45 3312 * perlio buffer layer
14a5cf38 3313 */
9e353e3b 3314
5e2ab84b 3315IV
2dc2558e 3316PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3317{
14a5cf38
JH
3318 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3319 int fd = PerlIO_fileno(f);
14a5cf38
JH
3320 if (fd >= 0 && PerlLIO_isatty(fd)) {
3321 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3322 }
4b069b44
NIS
3323 if (*PerlIONext(f)) {
3324 Off_t posn = PerlIO_tell(PerlIONext(f));
3325 if (posn != (Off_t) - 1) {
3326 b->posn = posn;
3327 }
14a5cf38 3328 }
2dc2558e 3329 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS
3330}
3331
9e353e3b 3332PerlIO *
14a5cf38
JH
3333PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3334 IV n, const char *mode, int fd, int imode, int perm,
3335 PerlIO *f, int narg, SV **args)
3336{
04892f78 3337 if (PerlIOValid(f)) {
14a5cf38 3338 PerlIO *next = PerlIONext(f);
04892f78
NIS
3339 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3340 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
14a5cf38 3341 next, narg, args);
2dc2558e 3342 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH
3343 return NULL;
3344 }
3345 }
3346 else {
04892f78 3347 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38
JH
3348 int init = 0;
3349 if (*mode == 'I') {
3350 init = 1;
3351 /*
71200d45 3352 * mode++;
14a5cf38
JH
3353 */
3354 }
3355 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
d9dac8cd 3356 f, narg, args);
14a5cf38 3357 if (f) {
22569500 3358 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC
3359 /*
3360 * if push fails during open, open fails. close will pop us.
3361 */
3362 PerlIO_close (f);
3363 return NULL;
3364 } else {
3365 fd = PerlIO_fileno(f);
b26b1ab5
NC
3366 if (init && fd == 2) {
3367 /*
3368 * Initial stderr is unbuffered
3369 */
3370 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3371 }
23b84778
IZ
3372#ifdef PERLIO_USING_CRLF
3373# ifdef PERLIO_IS_BINMODE_FD
3374 if (PERLIO_IS_BINMODE_FD(fd))
5c728af0 3375 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
23b84778
IZ
3376 else
3377# endif
3378 /*
3379 * do something about failing setmode()? --jhi
3380 */
3381 PerlLIO_setmode(fd, O_BINARY);
3382#endif
14a5cf38
JH
3383 }
3384 }
ee518936 3385 }
14a5cf38 3386 return f;
9e353e3b
NIS
3387}
3388
14a5cf38
JH
3389/*
3390 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 3391 * read or write state
14a5cf38 3392 */
9e353e3b 3393IV
f62ce20a 3394PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3395{
14a5cf38
JH
3396 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3397 int code = 0;
04892f78 3398 PerlIO *n = PerlIONext(f);
14a5cf38
JH
3399 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3400 /*
71200d45 3401 * write() the buffer
14a5cf38
JH
3402 */
3403 STDCHAR *buf = b->buf;
3404 STDCHAR *p = buf;
14a5cf38
JH
3405 while (p < b->ptr) {
3406 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3407 if (count > 0) {
3408 p += count;
3409 }
3410 else if (count < 0 || PerlIO_error(n)) {
3411 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3412 code = -1;
3413 break;
3414 }
3415 }
3416 b->posn += (p - buf);
3417 }
3418 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3419 STDCHAR *buf = PerlIO_get_base(f);
3420 /*
71200d45 3421 * Note position change
14a5cf38
JH
3422 */
3423 b->posn += (b->ptr - buf);
3424 if (b->ptr < b->end) {
4b069b44
NIS
3425 /* We did not consume all of it - try and seek downstream to
3426 our logical position
14a5cf38 3427 */
4b069b44 3428 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS
3429 /* Reload n as some layers may pop themselves on seek */
3430 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3431 }
ba5c3fe9 3432 else {
4b069b44
NIS
3433 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3434 data is lost for good - so return saying "ok" having undone
3435 the position adjust
3436 */
3437 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS
3438 return code;
3439 }
14a5cf38
JH
3440 }
3441 }
3442 b->ptr = b->end = b->buf;
3443 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3444 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3445 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH
3446 code = -1;
3447 return code;
6f9d8c32
NIS
3448}
3449
06da4f11 3450IV
f62ce20a 3451PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 3452{
14a5cf38
JH
3453 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3454 PerlIO *n = PerlIONext(f);
3455 SSize_t avail;
3456 /*
4b069b44
NIS
3457 * Down-stream flush is defined not to loose read data so is harmless.
3458 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38
JH
3459 */
3460 if (PerlIO_flush(f) != 0)
3461 return -1;
3462 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 3463 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH
3464
3465 if (!b->buf)
22569500 3466 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38
JH
3467
3468 b->ptr = b->end = b->buf;
4b069b44
NIS
3469
3470 if (!PerlIOValid(n)) {
3471 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3472 return -1;
3473 }
3474
14a5cf38
JH
3475 if (PerlIO_fast_gets(n)) {
3476 /*
04892f78 3477 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH
3478 * ->Read() because that will loop till it gets what we asked for
3479 * which may hang on a pipe etc. Instead take anything it has to
71200d45 3480 * hand, or ask it to fill _once_.
14a5cf38
JH
3481 */
3482 avail = PerlIO_get_cnt(n);
3483 if (avail <= 0) {
3484 avail = PerlIO_fill(n);
3485 if (avail == 0)
3486 avail = PerlIO_get_cnt(n);
3487 else {
3488 if (!PerlIO_error(n) && PerlIO_eof(n))
3489 avail = 0;
3490 }
3491 }
3492 if (avail > 0) {
3493 STDCHAR *ptr = PerlIO_get_ptr(n);
3494 SSize_t cnt = avail;
eb160463 3495 if (avail > (SSize_t)b->bufsiz)
14a5cf38
JH
3496 avail = b->bufsiz;
3497 Copy(ptr, b->buf, avail, STDCHAR);
3498 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3499 }
3500 }
3501 else {
3502 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3503 }
3504 if (avail <= 0) {
3505 if (avail == 0)
3506 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3507 else
3508 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3509 return -1;
3510 }
3511 b->end = b->buf + avail;
3512 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3513 return 0;
06da4f11
NIS
3514}
3515
6f9d8c32 3516SSize_t
f62ce20a 3517PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 3518{
14a5cf38 3519 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
04892f78 3520 if (PerlIOValid(f)) {
14a5cf38
JH
3521 if (!b->ptr)
3522 PerlIO_get_base(f);
f62ce20a 3523 return PerlIOBase_read(aTHX_ f, vbuf, count);
14a5cf38
JH
3524 }
3525 return 0;
6f9d8c32
NIS
3526}
3527
9e353e3b 3528SSize_t
f62ce20a 3529PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3530{
14a5cf38
JH
3531 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3532 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3533 SSize_t unread = 0;
3534 SSize_t avail;
3535 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3536 PerlIO_flush(f);
3537 if (!b->buf)
3538 PerlIO_get_base(f);
3539 if (b->buf) {
3540 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3541 /*
3542 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3543 * which have been read back to buffer start
14a5cf38
JH
3544 */
3545 avail = (b->ptr - b->buf);
3546 }
3547 else {
3548 /*
3549 * Buffer is idle, set it up so whole buffer is available for
71200d45 3550 * unread
14a5cf38
JH
3551 */
3552 avail = b->bufsiz;
3553 b->end = b->buf + avail;
3554 b->ptr = b->end;
3555 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3556 /*
71200d45 3557 * Buffer extends _back_ from where we are now
14a5cf38
JH
3558 */
3559 b->posn -= b->bufsiz;
3560 }
3561 if (avail > (SSize_t) count) {
3562 /*
71200d45 3563 * If we have space for more than count, just move count
14a5cf38
JH
3564 */
3565 avail = count;
3566 }
3567 if (avail > 0) {
3568 b->ptr -= avail;
3569 buf -= avail;
3570 /*
3571 * In simple stdio-like ungetc() case chars will be already
71200d45 3572 * there
14a5cf38
JH
3573 */
3574 if (buf != b->ptr) {
3575 Copy(buf, b->ptr, avail, STDCHAR);
3576 }
3577 count -= avail;
3578 unread += avail;
3579 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3580 }
3581 }
93679785
NIS
3582 if (count > 0) {
3583 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3584 }
14a5cf38 3585 return unread;
760ac839
LW
3586}
3587
9e353e3b 3588SSize_t
f62ce20a 3589PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 3590{
14a5cf38
JH
3591 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3592 const STDCHAR *buf = (const STDCHAR *) vbuf;
3593 Size_t written = 0;
3594 if (!b->buf)
3595 PerlIO_get_base(f);
3596 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3597 return 0;
0678cb22
NIS
3598 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3599 if (PerlIO_flush(f) != 0) {
3600 return 0;
3601 }
3602 }
14a5cf38
JH
3603 while (count > 0) {
3604 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3605 if ((SSize_t) count < avail)
3606 avail = count;
3607 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3608 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3609 while (avail > 0) {
3610 int ch = *buf++;
3611 *(b->ptr)++ = ch;
3612 count--;
3613 avail--;
3614 written++;
3615 if (ch == '\n') {
3616 PerlIO_flush(f);
3617 break;
3618 }
3619 }
3620 }
3621 else {
3622 if (avail) {
3623 Copy(buf, b->ptr, avail, STDCHAR);
3624 count -= avail;
3625 buf += avail;
3626 written += avail;
3627 b->ptr += avail;
3628 }
3629 }
3630 if (b->ptr >= (b->buf + b->bufsiz))
3631 PerlIO_flush(f);
3632 }
3633 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3634 PerlIO_flush(f);
3635 return written;
9e353e3b
NIS
3636}
3637
3638IV
f62ce20a 3639PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3640{
14a5cf38
JH
3641 IV code;
3642 if ((code = PerlIO_flush(f)) == 0) {
3643 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3644 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3645 code = PerlIO_seek(PerlIONext(f), offset, whence);
3646 if (code == 0) {
3647 b->posn = PerlIO_tell(PerlIONext(f));
3648 }
9e353e3b 3649 }
14a5cf38 3650 return code;
9e353e3b
NIS
3651}
3652
3653Off_t
f62ce20a 3654PerlIOBuf_tell(pTHX_ PerlIO *f)
9e353e3b 3655{
14a5cf38
JH
3656 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3657 /*
71200d45 3658 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH
3659 */
3660 Off_t posn = b->posn;
0678cb22
NIS
3661 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3662 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3663#if 1
3664 /* As O_APPEND files are normally shared in some sense it is better
3665 to flush :
3666 */
3667 PerlIO_flush(f);
3668#else
3669 /* when file is NOT shared then this is sufficient */
3670 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3671#endif
3672 posn = b->posn = PerlIO_tell(PerlIONext(f));
3673 }
14a5cf38
JH
3674 if (b->buf) {
3675 /*
71200d45 3676 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH
3677 */
3678 posn += (b->ptr - b->buf);
3679 }
3680 return posn;
9e353e3b
NIS
3681}
3682
3683IV
44798d05
NIS
3684PerlIOBuf_popped(pTHX_ PerlIO *f)
3685{
3686 IV code = PerlIOBase_popped(aTHX_ f);
3687 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3688 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3689 Safefree(b->buf);
3690 }
3691 b->buf = NULL;
3692 b->ptr = b->end = b->buf;
3693 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3694 return code;
3695}
3696
3697IV
f62ce20a 3698PerlIOBuf_close(pTHX_ PerlIO *f)
9e353e3b 3699{
f62ce20a 3700 IV code = PerlIOBase_close(aTHX_ f);
14a5cf38
JH
3701 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3702 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3703 Safefree(b->buf);
14a5cf38
JH
3704 }
3705 b->buf = NULL;
3706 b->ptr = b->end = b->buf;
3707 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3708 return code;
760ac839
LW
3709}
3710
9e353e3b 3711STDCHAR *
f62ce20a 3712PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3713{
14a5cf38
JH
3714 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3715 if (!b->buf)
3716 PerlIO_get_base(f);
3717 return b->ptr;
9e353e3b
NIS
3718}
3719
05d1247b 3720SSize_t
f62ce20a 3721PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3722{
14a5cf38
JH
3723 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3724 if (!b->buf)
3725 PerlIO_get_base(f);
3726 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3727 return (b->end - b->ptr);
3728 return 0;
9e353e3b
NIS
3729}
3730
3731STDCHAR *
f62ce20a 3732PerlIOBuf_get_base(pTHX_ PerlIO *f)
9e353e3b 3733{
14a5cf38
JH
3734 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3735 if (!b->buf) {
3736 if (!b->bufsiz)
3737 b->bufsiz = 4096;
a1ea730d 3738 b->buf =
7fcdafbd 3739 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH
3740 if (!b->buf) {
3741 b->buf = (STDCHAR *) & b->oneword;
3742 b->bufsiz = sizeof(b->oneword);
3743 }
3744 b->ptr = b->buf;
3745 b->end = b->ptr;
06da4f11 3746 }
14a5cf38 3747 return b->buf;