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Fixed in two places - p4 resolve
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
71200d45 2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW		 5 */
6
14a5cf38 7/*
71200d45 8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 9 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 10 * Invent a dSYS macro to abstract this out
14a5cf38 11 */
7bcba3d4
NIS		 12#ifdef PERL_IMPLICIT_SYS
13#define dSYS dTHX
14#else
15#define dSYS dNOOP
16#endif
17
760ac839 18#define VOIDUSED 1
12ae5dfc
JH		 19#ifdef PERL_MICRO
20# include "uconfig.h"
21#else
22# include "config.h"
23#endif
760ac839 24
6f9d8c32 25#define PERLIO_NOT_STDIO 0
760ac839 26#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 27/*
71200d45 28 * #define PerlIO FILE
14a5cf38 29 */
760ac839
LW		 30#endif
31/*
6f9d8c32 32 * This file provides those parts of PerlIO abstraction
88b61e10 33 * which are not #defined in perlio.h.
6f9d8c32 34 * Which these are depends on various Configure #ifdef's
760ac839
LW		 35 */
36
37#include "EXTERN.h"
864dbfa3 38#define PERL_IN_PERLIO_C
760ac839
LW		 39#include "perl.h"
40
0c4f7ff0
NIS		 41#include "XSUB.h"
42
5f1a76d0
NIS		 43#undef PerlMemShared_calloc
44#define PerlMemShared_calloc(x,y) calloc(x,y)
45#undef PerlMemShared_free
46#define PerlMemShared_free(x) free(x)
47
60382766 48int
f5b9d040 49perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 50{
14a5cf38 51 /*
71200d45 52 * This used to be contents of do_binmode in doio.c
14a5cf38 53 */
60382766
NIS		 54#ifdef DOSISH
55# if defined(atarist) || defined(__MINT__)
f5b9d040 56 if (!fflush(fp)) {
60382766 57 if (mode & O_BINARY)
14a5cf38 58 ((FILE *) fp)->_flag |= _IOBIN;
60382766 59 else
14a5cf38 60 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 61 return 1;
62 }
63 return 0;
64# else
eb73beca 65 dTHX;
14a5cf38
JH		 66#ifdef NETWARE
67 if (PerlLIO_setmode(fp, mode) != -1) {
68#else
f5b9d040 69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 70#endif
60382766 71# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 72 /*
71200d45 73 * The translation mode of the stream is maintained independent of
14a5cf38 74 * the translation mode of the fd in the Borland RTL (heavy
71200d45 75 * digging through their runtime sources reveal). User has to set
14a5cf38 76 * the mode explicitly for the stream (though they don't document
71200d45 77 * this anywhere). GSAR 97-5-24
60382766 78 */
14a5cf38 79 fseek(fp, 0L, 0);
60382766 80 if (mode & O_BINARY)
f5b9d040 81 fp->flags |= _F_BIN;
60382766 82 else
14a5cf38 83 fp->flags &= ~_F_BIN;
60382766
NIS		 84# endif
85 return 1;
86 }
87 else
88 return 0;
89# endif
90#else
91# if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
93 return 1;
94 else
95 return 0;
96# else
97 return 1;
98# endif
99#endif
100}
101
eb73beca
NIS		 102#ifndef PERLIO_LAYERS
103int
104PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
105{
14a5cf38
JH		 106 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
107 return 0;
108 }
109 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
110 /*
71200d45 111 * NOTREACHED
14a5cf38
JH		 112 */
113 return -1;
eb73beca
NIS		 114}
115
13621cfb
NIS		 116void
117PerlIO_destruct(pTHX)
118{
119}
120
f5b9d040
NIS		 121int
122PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
123{
92bff44d 124#ifdef USE_SFIO
14a5cf38 125 return 1;
92bff44d 126#else
14a5cf38 127 return perlsio_binmode(fp, iotype, mode);
92bff44d 128#endif
f5b9d040 129}
60382766 130
e0fa5af2
NIS		 131PerlIO *
132PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
133{
134 if (f) {
135 int fd = PerlLIO_dup(PerlIO_fileno(f));
136 if (fd >= 0) {
137 /* the r+ is a hack */
138 return PerlIO_fdopen(fd, "r+");
139 }
140 return NULL;
141 }
142 else {
143 SETERRNO(EBADF, SS$_IVCHAN);
144 }
145 return NULL;
146}
147
148
14a5cf38 149/*
71200d45 150 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 151 */
ee518936
NIS		 152
153PerlIO *
14a5cf38
JH		 154PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
155 int imode, int perm, PerlIO *old, int narg, SV **args)
156{
157 if (narg == 1) {
158 if (*args == &PL_sv_undef)
159 return PerlIO_tmpfile();
160 else {
161 char *name = SvPV_nolen(*args);
162 if (*mode == '#') {
163 fd = PerlLIO_open3(name, imode, perm);
164 if (fd >= 0)
165 return PerlIO_fdopen(fd, (char *) mode + 1);
166 }
167 else if (old) {
168 return PerlIO_reopen(name, mode, old);
169 }
170 else {
171 return PerlIO_open(name, mode);
172 }
173 }
174 }
175 else {
176 return PerlIO_fdopen(fd, (char *) mode);
177 }
178 return NULL;
ee518936
NIS		 179}
180
0c4f7ff0
NIS		 181XS(XS_PerlIO__Layer__find)
182{
14a5cf38
JH		 183 dXSARGS;
184 if (items < 2)
185 Perl_croak(aTHX_ "Usage class->find(name[,load])");
186 else {
187 char *name = SvPV_nolen(ST(1));
188 ST(0) = (strEQ(name, "crlf")
189 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
190 XSRETURN(1);
191 }
0c4f7ff0
NIS		 192}
193
194
195void
196Perl_boot_core_PerlIO(pTHX)
197{
14a5cf38 198 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 199}
200
ac27b0f5
NIS		 201#endif
202
32e30700 203
6f9d8c32 204#ifdef PERLIO_IS_STDIO
760ac839
LW		 205
206void
8ac85365 207PerlIO_init(void)
760ac839 208{
14a5cf38
JH		 209 /*
210 * Does nothing (yet) except force this file to be included in perl
71200d45 211 * binary. That allows this file to force inclusion of other functions
14a5cf38 212 * that may be required by loadable extensions e.g. for
71200d45 213 * FileHandle::tmpfile
14a5cf38 214 */
760ac839
LW		 215}
216
33dcbb9a 217#undef PerlIO_tmpfile
218PerlIO *
8ac85365 219PerlIO_tmpfile(void)
33dcbb9a 220{
14a5cf38 221 return tmpfile();
33dcbb9a 222}
223
14a5cf38 224#else /* PERLIO_IS_STDIO */
760ac839
LW		 225
226#ifdef USE_SFIO
227
228#undef HAS_FSETPOS
229#undef HAS_FGETPOS
230
14a5cf38
JH		 231/*
232 * This section is just to make sure these functions get pulled in from
71200d45 233 * libsfio.a
14a5cf38 234 */
760ac839
LW		 235
236#undef PerlIO_tmpfile
237PerlIO *
c78749f2 238PerlIO_tmpfile(void)
760ac839 239{
14a5cf38 240 return sftmp(0);
760ac839
LW		 241}
242
243void
c78749f2 244PerlIO_init(void)
760ac839 245{
14a5cf38
JH		 246 /*
247 * Force this file to be included in perl binary. Which allows this
248 * file to force inclusion of other functions that may be required by
71200d45 249 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 250 */
760ac839 251
14a5cf38 252 /*
71200d45 253 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 254 * results in a lot of lseek()s to regular files and lot of small
71200d45 255 * writes to pipes.
14a5cf38
JH		 256 */
257 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 258}
259
92bff44d
NIS		 260PerlIO *
261PerlIO_importFILE(FILE *stdio, int fl)
262{
14a5cf38
JH		 263 int fd = fileno(stdio);
264 PerlIO *r = PerlIO_fdopen(fd, "r+");
265 return r;
92bff44d
NIS		 266}
267
268FILE *
269PerlIO_findFILE(PerlIO *pio)
270{
14a5cf38
JH		 271 int fd = PerlIO_fileno(pio);
272 FILE *f = fdopen(fd, "r+");
273 PerlIO_flush(pio);
274 if (!f && errno == EINVAL)
275 f = fdopen(fd, "w");
276 if (!f && errno == EINVAL)
277 f = fdopen(fd, "r");
278 return f;
92bff44d
NIS		 279}
280
281
14a5cf38 282#else /* USE_SFIO */
6f9d8c32 283/*======================================================================================*/
14a5cf38 284/*
71200d45 285 * Implement all the PerlIO interface ourselves.
9e353e3b 286 */
760ac839 287
76ced9ad
NIS		 288#include "perliol.h"
289
14a5cf38
JH		 290/*
291 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 292 * files
14a5cf38 293 */
02f66e2f
NIS		 294#ifdef I_UNISTD
295#include <unistd.h>
296#endif
06da4f11
NIS		 297#ifdef HAS_MMAP
298#include <sys/mman.h>
299#endif
300
02f66e2f 301
14a5cf38
JH		 302void PerlIO_debug(const char *fmt, ...)
303 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 304
6f9d8c32 305void
14a5cf38
JH		 306PerlIO_debug(const char *fmt, ...)
307{
308 static int dbg = 0;
309 va_list ap;
310 dSYS;
311 va_start(ap, fmt);
312 if (!dbg) {
313 char *s = PerlEnv_getenv("PERLIO_DEBUG");
314 if (s && *s)
315 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
316 else
317 dbg = -1;
318 }
319 if (dbg > 0) {
320 dTHX;
70ace5da
NIS		 321#ifdef USE_ITHREADS
322 /* Use fixed buffer as sv_catpvf etc. needs SVs */
323 char buffer[1024];
324 char *s;
325 STRLEN len;
326 s = CopFILE(PL_curcop);
327 if (!s)
328 s = "(none)";
329 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
330 len = strlen(buffer);
331 vsprintf(buffer+len, fmt, ap);
332 PerlLIO_write(dbg, buffer, strlen(buffer));
333#else
14a5cf38
JH		 334 SV *sv = newSVpvn("", 0);
335 char *s;
336 STRLEN len;
337 s = CopFILE(PL_curcop);
338 if (!s)
339 s = "(none)";
340 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
341 (IV) CopLINE(PL_curcop));
342 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
343
344 s = SvPV(sv, len);
345 PerlLIO_write(dbg, s, len);
346 SvREFCNT_dec(sv);
70ace5da 347#endif
14a5cf38
JH		 348 }
349 va_end(ap);
6f9d8c32
NIS		 350}
351
9e353e3b
NIS		 352/*--------------------------------------------------------------------------------------*/
353
14a5cf38 354/*
71200d45 355 * Inner level routines
14a5cf38 356 */
9e353e3b 357
14a5cf38 358/*
71200d45 359 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38
JH		 360 */
361PerlIO *_perlio = NULL;
05d1247b 362#define PERLIO_TABLE_SIZE 64
6f9d8c32 363
e3f3bf95
NIS		 364
365
760ac839 366PerlIO *
5f1a76d0 367PerlIO_allocate(pTHX)
6f9d8c32 368{
14a5cf38 369 /*
71200d45 370 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 371 */
372 PerlIO **last;
373 PerlIO *f;
374 last = &_perlio;
375 while ((f = *last)) {
376 int i;
377 last = (PerlIO **) (f);
378 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
379 if (!*++f) {
380 return f;
381 }
382 }
383 }
384 f = PerlMemShared_calloc(PERLIO_TABLE_SIZE, sizeof(PerlIO));
385 if (!f) {
386 return NULL;
387 }
388 *last = f;
389 return f + 1;
05d1247b
NIS		 390}
391
392void
5f1a76d0 393PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 394{
14a5cf38
JH		 395 PerlIO *table = *tablep;
396 if (table) {
397 int i;
398 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
399 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
400 PerlIO *f = table + i;
401 if (*f) {
402 PerlIO_close(f);
403 }
404 }
405 PerlMemShared_free(table);
406 *tablep = NULL;
05d1247b 407 }
05d1247b
NIS		 408}
409
fcf2db38
NIS		 410PerlIO_list_t *PerlIO_known_layers;
411PerlIO_list_t *PerlIO_def_layerlist;
412
413PerlIO_list_t *
414PerlIO_list_alloc(void)
415{
14a5cf38
JH		 416 PerlIO_list_t *list;
417 Newz('L', list, 1, PerlIO_list_t);
418 list->refcnt = 1;
419 return list;
fcf2db38
NIS		 420}
421
422void
423PerlIO_list_free(PerlIO_list_t *list)
424{
14a5cf38
JH		 425 if (list) {
426 if (--list->refcnt == 0) {
427 if (list->array) {
428 dTHX;
429 IV i;
430 for (i = 0; i < list->cur; i++) {
431 if (list->array[i].arg)
432 SvREFCNT_dec(list->array[i].arg);
433 }
434 Safefree(list->array);
435 }
436 Safefree(list);
437 }
438 }
fcf2db38
NIS		 439}
440
441void
14a5cf38
JH		 442PerlIO_list_push(PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
443{
444 dTHX;
445 PerlIO_pair_t *p;
446 if (list->cur >= list->len) {
447 list->len += 8;
448 if (list->array)
449 Renew(list->array, list->len, PerlIO_pair_t);
450 else
451 New('l', list->array, list->len, PerlIO_pair_t);
452 }
453 p = &(list->array[list->cur++]);
454 p->funcs = funcs;
455 if ((p->arg = arg)) {
456 SvREFCNT_inc(arg);
457 }
fcf2db38
NIS		 458}
459
4a4a6116 460
05d1247b 461void
acfe0abc 462PerlIO_cleanup_layers(pTHX_ void *data)
9a6404c5 463{
fcf2db38 464#if 0
14a5cf38
JH		 465 PerlIO_known_layers = Nullhv;
466 PerlIO_def_layerlist = Nullav;
fcf2db38 467#endif
9a6404c5
DM		 468}
469
470void
5f1a76d0 471PerlIO_cleanup()
05d1247b 472{
14a5cf38
JH		 473 dTHX;
474 PerlIO_cleantable(aTHX_ & _perlio);
6f9d8c32
NIS		 475}
476
9e353e3b 477void
13621cfb
NIS		 478PerlIO_destruct(pTHX)
479{
14a5cf38
JH		 480 PerlIO **table = &_perlio;
481 PerlIO *f;
482 while ((f = *table)) {
483 int i;
484 table = (PerlIO **) (f++);
485 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
486 PerlIO *x = f;
487 PerlIOl *l;
488 while ((l = *x)) {
489 if (l->tab->kind & PERLIO_K_DESTRUCT) {
490 PerlIO_debug("Destruct popping %s\n", l->tab->name);
491 PerlIO_flush(x);
492 PerlIO_pop(aTHX_ x);
493 }
494 else {
495 x = PerlIONext(x);
496 }
497 }
498 f++;
499 }
500 }
13621cfb
NIS		 501}
502
503void
a999f61b 504PerlIO_pop(pTHX_ PerlIO *f)
760ac839 505{
14a5cf38
JH		 506 PerlIOl *l = *f;
507 if (l) {
508 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
509 if (l->tab->Popped) {
510 /*
511 * If popped returns non-zero do not free its layer structure
512 * it has either done so itself, or it is shared and still in
71200d45 513 * use
14a5cf38
JH		 514 */
515 if ((*l->tab->Popped) (f) != 0)
516 return;
517 }
518 *f = l->next;;
519 PerlMemShared_free(l);
a8c08ecd 520 }
6f9d8c32
NIS		 521}
522
9e353e3b 523/*--------------------------------------------------------------------------------------*/
14a5cf38 524/*
71200d45 525 * XS Interface for perl code
14a5cf38 526 */
9e353e3b 527
fcf2db38 528PerlIO_funcs *
2edd7e44 529PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 530{
14a5cf38
JH		 531 IV i;
532 if ((SSize_t) len <= 0)
533 len = strlen(name);
534 for (i = 0; i < PerlIO_known_layers->cur; i++) {
535 PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
536 if (memEQ(f->name, name, len)) {
537 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
538 return f;
539 }
540 }
541 if (load && PL_subname && PerlIO_def_layerlist
542 && PerlIO_def_layerlist->cur >= 2) {
543 SV *pkgsv = newSVpvn("PerlIO", 6);
544 SV *layer = newSVpvn(name, len);
545 ENTER;
546 /*
71200d45 547 * The two SVs are magically freed by load_module
14a5cf38
JH		 548 */
549 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
550 LEAVE;
551 return PerlIO_find_layer(aTHX_ name, len, 0);
552 }
553 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
554 return NULL;
f3862f8b
NIS		 555}
556
2a1bc955 557#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 558
559static int
560perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
561{
14a5cf38
JH		 562 if (SvROK(sv)) {
563 IO *io = GvIOn((GV *) SvRV(sv));
564 PerlIO *ifp = IoIFP(io);
565 PerlIO *ofp = IoOFP(io);
566 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
567 }
568 return 0;
b13b2135
NIS		 569}
570
571static int
572perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
573{
14a5cf38
JH		 574 if (SvROK(sv)) {
575 IO *io = GvIOn((GV *) SvRV(sv));
576 PerlIO *ifp = IoIFP(io);
577 PerlIO *ofp = IoOFP(io);
578 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
579 }
580 return 0;
b13b2135
NIS		 581}
582
583static int
584perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
585{
14a5cf38
JH		 586 Perl_warn(aTHX_ "clear %" SVf, sv);
587 return 0;
b13b2135
NIS		 588}
589
590static int
591perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
592{
14a5cf38
JH		 593 Perl_warn(aTHX_ "free %" SVf, sv);
594 return 0;
b13b2135
NIS		 595}
596
597MGVTBL perlio_vtab = {
14a5cf38
JH		 598 perlio_mg_get,
599 perlio_mg_set,
600 NULL, /* len */
601 perlio_mg_clear,
602 perlio_mg_free
b13b2135
NIS		 603};
604
605XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
606{
14a5cf38
JH		 607 dXSARGS;
608 SV *sv = SvRV(ST(1));
609 AV *av = newAV();
610 MAGIC *mg;
611 int count = 0;
612 int i;
613 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
614 SvRMAGICAL_off(sv);
615 mg = mg_find(sv, PERL_MAGIC_ext);
616 mg->mg_virtual = &perlio_vtab;
617 mg_magical(sv);
618 Perl_warn(aTHX_ "attrib %" SVf, sv);
619 for (i = 2; i < items; i++) {
620 STRLEN len;
621 const char *name = SvPV(ST(i), len);
622 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
623 if (layer) {
624 av_push(av, SvREFCNT_inc(layer));
625 }
626 else {
627 ST(count) = ST(i);
628 count++;
629 }
630 }
631 SvREFCNT_dec(av);
632 XSRETURN(count);
633}
634
635#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 636
e3f3bf95
NIS		 637SV *
638PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 639{
14a5cf38
JH		 640 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
641 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
642 return sv;
e3f3bf95
NIS		 643}
644
0c4f7ff0
NIS		 645XS(XS_PerlIO__Layer__find)
646{
14a5cf38
JH		 647 dXSARGS;
648 if (items < 2)
649 Perl_croak(aTHX_ "Usage class->find(name[,load])");
650 else {
651 STRLEN len = 0;
652 char *name = SvPV(ST(1), len);
653 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
654 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
655 ST(0) =
656 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
657 &PL_sv_undef;
658 XSRETURN(1);
659 }
0c4f7ff0
NIS		 660}
661
e3f3bf95
NIS		 662void
663PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
664{
14a5cf38
JH		 665 if (!PerlIO_known_layers)
666 PerlIO_known_layers = PerlIO_list_alloc();
667 PerlIO_list_push(PerlIO_known_layers, tab, Nullsv);
668 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 669}
670
1141d9f8 671int
fcf2db38 672PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 673{
14a5cf38
JH		 674 if (names) {
675 const char *s = names;
676 while (*s) {
677 while (isSPACE(*s) || *s == ':')
678 s++;
679 if (*s) {
680 STRLEN llen = 0;
681 const char *e = s;
682 const char *as = Nullch;
683 STRLEN alen = 0;
684 if (!isIDFIRST(*s)) {
685 /*
686 * Message is consistent with how attribute lists are
687 * passed. Even though this means "foo : : bar" is
71200d45 688 * seen as an invalid separator character.
14a5cf38
JH		 689 */
690 char q = ((*s == '\'') ? '"' : '\'');
691 Perl_warn(aTHX_
692 "perlio: invalid separator character %c%c%c in layer specification list",
693 q, *s, q);
694 return -1;
695 }
696 do {
697 e++;
698 } while (isALNUM(*e));
699 llen = e - s;
700 if (*e == '(') {
701 int nesting = 1;
702 as = ++e;
703 while (nesting) {
704 switch (*e++) {
705 case ')':
706 if (--nesting == 0)
707 alen = (e - 1) - as;
708 break;
709 case '(':
710 ++nesting;
711 break;
712 case '\\':
713 /*
714 * It's a nul terminated string, not allowed
715 * to \ the terminating null. Anything other
71200d45 716 * character is passed over.
14a5cf38
JH		 717 */
718 if (*e++) {
719 break;
720 }
721 /*
71200d45 722 * Drop through
14a5cf38
JH		 723 */
724 case '\0':
725 e--;
726 Perl_warn(aTHX_
727 "perlio: argument list not closed for layer \"%.*s\"",
728 (int) (e - s), s);
729 return -1;
730 default:
731 /*
71200d45 732 * boring.
14a5cf38
JH		 733 */
734 break;
735 }
736 }
737 }
738 if (e > s) {
739 PerlIO_funcs *layer =
740 PerlIO_find_layer(aTHX_ s, llen, 1);
741 if (layer) {
742 PerlIO_list_push(av, layer,
743 (as) ? newSVpvn(as,
744 alen) :
745 &PL_sv_undef);
746 }
747 else {
748 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
749 (int) llen, s);
750 return -1;
751 }
752 }
753 s = e;
754 }
755 }
756 }
757 return 0;
1141d9f8
NIS		 758}
759
dfebf958 760void
fcf2db38 761PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 762{
14a5cf38
JH		 763 PerlIO_funcs *tab = &PerlIO_perlio;
764 if (O_BINARY != O_TEXT) {
765 tab = &PerlIO_crlf;
766 }
767 else {
768 if (PerlIO_stdio.Set_ptrcnt) {
769 tab = &PerlIO_stdio;
770 }
dfebf958 771 }
14a5cf38
JH		 772 PerlIO_debug("Pushing %s\n", tab->name);
773 PerlIO_list_push(av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
774 &PL_sv_undef);
dfebf958
NIS		 775}
776
e3f3bf95 777SV *
14a5cf38 778PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 779{
14a5cf38 780 return av->array[n].arg;
e3f3bf95
NIS		 781}
782
f3862f8b 783PerlIO_funcs *
14a5cf38 784PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 785{
14a5cf38
JH		 786 if (n >= 0 && n < av->cur) {
787 PerlIO_debug("Layer %" IVdf " is %s\n", n,
788 av->array[n].funcs->name);
789 return av->array[n].funcs;
790 }
791 if (!def)
792 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
793 return def;
e3f3bf95
NIS		 794}
795
fcf2db38 796PerlIO_list_t *
e3f3bf95
NIS		 797PerlIO_default_layers(pTHX)
798{
14a5cf38
JH		 799 if (!PerlIO_def_layerlist) {
800 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
801 PerlIO_funcs *osLayer = &PerlIO_unix;
802 PerlIO_def_layerlist = PerlIO_list_alloc();
803 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 804#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 805 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 806#if 0
14a5cf38 807 osLayer = &PerlIO_win32;
0c4128ad 808#endif
2f8118af 809#endif
14a5cf38
JH		 810 PerlIO_define_layer(aTHX_ & PerlIO_raw);
811 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
812 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
813 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 814#ifdef HAS_MMAP
14a5cf38 815 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 816#endif
14a5cf38
JH		 817 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
818 PerlIO_define_layer(aTHX_ & PerlIO_byte);
819 PerlIO_list_push(PerlIO_def_layerlist,
820 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
821 &PL_sv_undef);
822 if (s) {
823 PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist, s);
824 }
825 else {
826 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
827 }
1141d9f8 828 }
14a5cf38
JH		 829 if (PerlIO_def_layerlist->cur < 2) {
830 PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
f3862f8b 831 }
14a5cf38 832 return PerlIO_def_layerlist;
e3f3bf95
NIS		 833}
834
0c4f7ff0
NIS		 835void
836Perl_boot_core_PerlIO(pTHX)
837{
838#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 839 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
840 __FILE__);
0c4f7ff0 841#endif
14a5cf38 842 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 843}
e3f3bf95
NIS		 844
845PerlIO_funcs *
846PerlIO_default_layer(pTHX_ I32 n)
847{
14a5cf38
JH		 848 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
849 if (n < 0)
850 n += av->cur;
851 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 852}
853
a999f61b
NIS		 854#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
855#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 856
857void
1141d9f8 858PerlIO_stdstreams(pTHX)
60382766 859{
14a5cf38
JH		 860 if (!_perlio) {
861 PerlIO_allocate(aTHX);
862 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
863 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
864 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
865 }
60382766
NIS		 866}
867
868PerlIO *
14a5cf38
JH		 869PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
870{
871 PerlIOl *l = NULL;
872 l = PerlMemShared_calloc(tab->size, sizeof(char));
873 if (l) {
874 Zero(l, tab->size, char);
875 l->next = *f;
876 l->tab = tab;
877 *f = l;
878 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
879 (mode) ? mode : "(Null)", arg);
880 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
881 PerlIO_pop(aTHX_ f);
882 return NULL;
883 }
884 }
885 return f;
60382766
NIS		 886}
887
dfebf958 888IV
e3f3bf95 889PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 890{
14a5cf38
JH		 891 dTHX;
892 PerlIO_pop(aTHX_ f);
893 if (*f) {
894 PerlIO_flush(f);
895 PerlIO_pop(aTHX_ f);
896 return 0;
897 }
898 return -1;
4b803d04
NIS		 899}
900
901IV
e3f3bf95 902PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 903{
14a5cf38 904 /*
71200d45 905 * Remove the dummy layer
14a5cf38
JH		 906 */
907 dTHX;
908 PerlIO_pop(aTHX_ f);
909 /*
71200d45 910 * Pop back to bottom layer
14a5cf38
JH		 911 */
912 if (f && *f) {
913 PerlIO_flush(f);
914 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
915 if (*PerlIONext(f)) {
916 PerlIO_pop(aTHX_ f);
917 }
918 else {
919 /*
71200d45 920 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 921 */
922 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
923 PerlIO_pop(aTHX_ PerlIONext(f));
924 }
925 break;
926 }
927 }
928 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
929 return 0;
930 }
931 return -1;
dfebf958
NIS		 932}
933
ac27b0f5 934int
14a5cf38
JH		 935PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
936 PerlIO_list_t *layers, IV n)
937{
938 IV max = layers->cur;
939 int code = 0;
940 while (n < max) {
941 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
942 if (tab) {
943 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
944 code = -1;
945 break;
946 }
947 }
948 n++;
949 }
950 return code;
e3f3bf95
NIS		 951}
952
953int
ac27b0f5
NIS		 954PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
955{
14a5cf38
JH		 956 int code = 0;
957 if (names) {
958 PerlIO_list_t *layers = PerlIO_list_alloc();
959 code = PerlIO_parse_layers(aTHX_ layers, names);
960 if (code == 0) {
961 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
962 }
963 PerlIO_list_free(layers);
ac27b0f5 964 }
14a5cf38 965 return code;
ac27b0f5
NIS		 966}
967
f3862f8b 968
60382766 969/*--------------------------------------------------------------------------------------*/
14a5cf38 970/*
71200d45 971 * Given the abstraction above the public API functions
14a5cf38 972 */
60382766
NIS		 973
974int
f5b9d040 975PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 976{
14a5cf38
JH		 977 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
978 f, PerlIOBase(f)->tab->name, iotype, mode,
979 (names) ? names : "(Null)");
89aec743 980 PerlIO_flush(f);
14a5cf38
JH		 981 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
982 PerlIO *top = f;
983 while (*top) {
984 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 985 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
986 break;
987 }
988 top = PerlIONext(top);
89aec743 989 PerlIO_flush(top);
14a5cf38
JH		 990 }
991 }
992 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 993}
994
995#undef PerlIO__close
996int
997PerlIO__close(PerlIO *f)
998{
14a5cf38
JH		 999 if (f && *f)
1000 return (*PerlIOBase(f)->tab->Close) (f);
1001 else {
1002 SETERRNO(EBADF, SS$_IVCHAN);
1003 return -1;
1004 }
76ced9ad
NIS		 1005}
1006
5f1a76d0
NIS		 1007#undef PerlIO_fdupopen
1008PerlIO *
8cf8f3d1 1009PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
5f1a76d0 1010{
14a5cf38 1011 if (f && *f) {
8cf8f3d1 1012 PerlIO_funcs *tab = PerlIOBase(f)->tab;
a8fc9800
NIS		 1013 PerlIO *new;
1014 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
1015 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
14a5cf38
JH		 1016 return new;
1017 }
1018 else {
1019 SETERRNO(EBADF, SS$_IVCHAN);
1020 return NULL;
1021 }
5f1a76d0 1022}
f5b9d040 1023
b931b1d9
NIS		 1024#undef PerlIO_close
1025int
1026PerlIO_close(PerlIO *f)
1027{
14a5cf38
JH		 1028 dTHX;
1029 int code = -1;
1030 if (f && *f) {
1031 code = (*PerlIOBase(f)->tab->Close) (f);
1032 while (*f) {
1033 PerlIO_pop(aTHX_ f);
1034 }
f6c77cf1 1035 }
14a5cf38 1036 return code;
b931b1d9
NIS		 1037}
1038
1039#undef PerlIO_fileno
1040int
1041PerlIO_fileno(PerlIO *f)
1042{
14a5cf38
JH		 1043 if (f && *f)
1044 return (*PerlIOBase(f)->tab->Fileno) (f);
1045 else {
1046 SETERRNO(EBADF, SS$_IVCHAN);
1047 return -1;
1048 }
b931b1d9
NIS		 1049}
1050
1141d9f8
NIS		 1051static const char *
1052PerlIO_context_layers(pTHX_ const char *mode)
1053{
14a5cf38
JH		 1054 const char *type = NULL;
1055 /*
71200d45 1056 * Need to supply default layer info from open.pm
14a5cf38
JH		 1057 */
1058 if (PL_curcop) {
1059 SV *layers = PL_curcop->cop_io;
1060 if (layers) {
1061 STRLEN len;
1062 type = SvPV(layers, len);
1063 if (type && mode[0] != 'r') {
1064 /*
71200d45 1065 * Skip to write part
14a5cf38
JH		 1066 */
1067 const char *s = strchr(type, 0);
1068 if (s && (s - type) < len) {
1069 type = s + 1;
1070 }
1071 }
1072 }
1073 }
1074 return type;
1141d9f8
NIS		 1075}
1076
fcf2db38 1077static PerlIO_funcs *
2edd7e44
NIS		 1078PerlIO_layer_from_ref(pTHX_ SV *sv)
1079{
14a5cf38 1080 /*
71200d45 1081 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1082 */
1083 if (SvTYPE(sv) < SVt_PVAV)
1084 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1085
1086 /*
71200d45 1087 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1088 */
1089 switch (SvTYPE(sv)) {
1090 case SVt_PVAV:
1091 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1092 case SVt_PVHV:
1093 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1094 case SVt_PVCV:
1095 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1096 case SVt_PVGV:
1097 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1098 }
1099 return NULL;
2edd7e44
NIS		 1100}
1101
fcf2db38 1102PerlIO_list_t *
14a5cf38
JH		 1103PerlIO_resolve_layers(pTHX_ const char *layers,
1104 const char *mode, int narg, SV **args)
1105{
1106 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1107 int incdef = 1;
1108 if (!_perlio)
1109 PerlIO_stdstreams(aTHX);
1110 if (narg) {
1111 SV *arg = *args;
1112 /*
71200d45
NIS		 1113 * If it is a reference but not an object see if we have a handler
1114 * for it
14a5cf38
JH		 1115 */
1116 if (SvROK(arg) && !sv_isobject(arg)) {
1117 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1118 if (handler) {
1119 def = PerlIO_list_alloc();
1120 PerlIO_list_push(def, handler, &PL_sv_undef);
1121 incdef = 0;
1122 }
1123 /*
71200d45 1124 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1125 * something sensible else we will just stringfy and open
71200d45 1126 * resulting string.
14a5cf38
JH		 1127 */
1128 }
1129 }
1130 if (!layers)
1131 layers = PerlIO_context_layers(aTHX_ mode);
1132 if (layers && *layers) {
1133 PerlIO_list_t *av;
1134 if (incdef) {
1135 IV i = def->cur;
1136 av = PerlIO_list_alloc();
1137 for (i = 0; i < def->cur; i++) {
1138 PerlIO_list_push(av, def->array[i].funcs,
1139 def->array[i].arg);
1140 }
1141 }
1142 else {
1143 av = def;
1144 }
1145 PerlIO_parse_layers(aTHX_ av, layers);
1146 return av;
1147 }
1148 else {
1149 if (incdef)
1150 def->refcnt++;
1151 return def;
1152 }
ee518936
NIS		 1153}
1154
1155PerlIO *
14a5cf38
JH		 1156PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1157 int imode, int perm, PerlIO *f, int narg, SV **args)
1158{
1159 if (!f && narg == 1 && *args == &PL_sv_undef) {
1160 if ((f = PerlIO_tmpfile())) {
1161 if (!layers)
1162 layers = PerlIO_context_layers(aTHX_ mode);
1163 if (layers && *layers)
1164 PerlIO_apply_layers(aTHX_ f, mode, layers);
1165 }
1166 }
1167 else {
1168 PerlIO_list_t *layera = NULL;
1169 IV n;
1170 PerlIO_funcs *tab = NULL;
1171 if (f && *f) {
1172 /*
71200d45
NIS		 1173 * This is "reopen" - it is not tested as perl does not use it
1174 * yet
14a5cf38
JH		 1175 */
1176 PerlIOl *l = *f;
1177 layera = PerlIO_list_alloc();
1178 while (l) {
1179 SV *arg =
1180 (l->tab->Getarg) ? (*l->tab->
1181 Getarg) (&l) : &PL_sv_undef;
1182 PerlIO_list_push(layera, l->tab, arg);
1183 l = *PerlIONext(&l);
1184 }
1185 }
1186 else {
1187 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1188 }
1189 /*
71200d45 1190 * Start at "top" of layer stack
14a5cf38
JH		 1191 */
1192 n = layera->cur - 1;
1193 while (n >= 0) {
1194 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1195 if (t && t->Open) {
1196 tab = t;
1197 break;
1198 }
1199 n--;
1200 }
1201 if (tab) {
1202 /*
71200d45 1203 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1204 */
1205 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1206 tab->name, layers, mode, fd, imode, perm, f, narg,
1207 args);
1208 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1209 f, narg, args);
1210 if (f) {
1211 if (n + 1 < layera->cur) {
1212 /*
1213 * More layers above the one that we used to open -
71200d45 1214 * apply them now
14a5cf38
JH		 1215 */
1216 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1217 != 0) {
1218 f = NULL;
1219 }
1220 }
1221 }
1222 }
1223 PerlIO_list_free(layera);
1224 }
1225 return f;
ee518936 1226}
b931b1d9
NIS		 1227
1228
9e353e3b
NIS		 1229#undef PerlIO_fdopen
1230PerlIO *
1231PerlIO_fdopen(int fd, const char *mode)
1232{
14a5cf38
JH		 1233 dTHX;
1234 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1235}
1236
6f9d8c32
NIS		 1237#undef PerlIO_open
1238PerlIO *
1239PerlIO_open(const char *path, const char *mode)
1240{
14a5cf38
JH		 1241 dTHX;
1242 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1243 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1244}
1245
9e353e3b
NIS		 1246#undef PerlIO_reopen
1247PerlIO *
1248PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1249{
14a5cf38
JH		 1250 dTHX;
1251 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1252 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1253}
1254
9e353e3b
NIS		 1255#undef PerlIO_read
1256SSize_t
1257PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1258{
14a5cf38
JH		 1259 if (f && *f)
1260 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1261 else {
1262 SETERRNO(EBADF, SS$_IVCHAN);
1263 return -1;
1264 }
760ac839
LW		 1265}
1266
313ca112
NIS		 1267#undef PerlIO_unread
1268SSize_t
1269PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1270{
14a5cf38
JH		 1271 if (f && *f)
1272 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1273 else {
1274 SETERRNO(EBADF, SS$_IVCHAN);
1275 return -1;
1276 }
760ac839
LW		 1277}
1278
9e353e3b
NIS		 1279#undef PerlIO_write
1280SSize_t
1281PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1282{
14a5cf38
JH		 1283 if (f && *f)
1284 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1285 else {
1286 SETERRNO(EBADF, SS$_IVCHAN);
1287 return -1;
1288 }
760ac839
LW		 1289}
1290
9e353e3b 1291#undef PerlIO_seek
6f9d8c32 1292int
9e353e3b 1293PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1294{
14a5cf38
JH		 1295 if (f && *f)
1296 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1297 else {
1298 SETERRNO(EBADF, SS$_IVCHAN);
1299 return -1;
1300 }
760ac839
LW		 1301}
1302
9e353e3b
NIS		 1303#undef PerlIO_tell
1304Off_t
1305PerlIO_tell(PerlIO *f)
760ac839 1306{
14a5cf38
JH		 1307 if (f && *f)
1308 return (*PerlIOBase(f)->tab->Tell) (f);
1309 else {
1310 SETERRNO(EBADF, SS$_IVCHAN);
1311 return -1;
1312 }
760ac839
LW		 1313}
1314
9e353e3b 1315#undef PerlIO_flush
6f9d8c32 1316int
9e353e3b 1317PerlIO_flush(PerlIO *f)
760ac839 1318{
14a5cf38
JH		 1319 if (f) {
1320 if (*f) {
1321 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1322 if (tab && tab->Flush) {
1323 return (*tab->Flush) (f);
1324 }
1325 else {
1326 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1327 SETERRNO(EBADF, SS$_IVCHAN);
1328 return -1;
1329 }
1330 }
1331 else {
1332 PerlIO_debug("Cannot flush f=%p\n", f);
1333 SETERRNO(EBADF, SS$_IVCHAN);
1334 return -1;
1335 }
1336 }
1337 else {
1338 /*
1339 * Is it good API design to do flush-all on NULL, a potentially
1340 * errorneous input? Maybe some magical value (PerlIO*
1341 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1342 * things on fflush(NULL), but should we be bound by their design
71200d45 1343 * decisions? --jhi
14a5cf38
JH		 1344 */
1345 PerlIO **table = &_perlio;
1346 int code = 0;
1347 while ((f = *table)) {
1348 int i;
1349 table = (PerlIO **) (f++);
1350 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1351 if (*f && PerlIO_flush(f) != 0)
1352 code = -1;
1353 f++;
1354 }
1355 }
1356 return code;
1357 }
760ac839
LW		 1358}
1359
a9c883f6
NIS		 1360void
1361PerlIOBase_flush_linebuf()
1362{
14a5cf38
JH		 1363 PerlIO **table = &_perlio;
1364 PerlIO *f;
1365 while ((f = *table)) {
1366 int i;
1367 table = (PerlIO **) (f++);
1368 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1369 if (*f
1370 && (PerlIOBase(f)->
1371 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1372 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1373 PerlIO_flush(f);
1374 f++;
1375 }
a9c883f6 1376 }
a9c883f6
NIS		 1377}
1378
06da4f11
NIS		 1379#undef PerlIO_fill
1380int
1381PerlIO_fill(PerlIO *f)
1382{
14a5cf38
JH		 1383 if (f && *f)
1384 return (*PerlIOBase(f)->tab->Fill) (f);
1385 else {
1386 SETERRNO(EBADF, SS$_IVCHAN);
1387 return -1;
1388 }
06da4f11
NIS		 1389}
1390
f3862f8b
NIS		 1391#undef PerlIO_isutf8
1392int
1393PerlIO_isutf8(PerlIO *f)
1394{
14a5cf38
JH		 1395 if (f && *f)
1396 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1397 else {
1398 SETERRNO(EBADF, SS$_IVCHAN);
1399 return -1;
1400 }
f3862f8b
NIS		 1401}
1402
9e353e3b 1403#undef PerlIO_eof
6f9d8c32 1404int
9e353e3b 1405PerlIO_eof(PerlIO *f)
760ac839 1406{
14a5cf38
JH		 1407 if (f && *f)
1408 return (*PerlIOBase(f)->tab->Eof) (f);
1409 else {
1410 SETERRNO(EBADF, SS$_IVCHAN);
1411 return -1;
1412 }
9e353e3b
NIS		 1413}
1414
1415#undef PerlIO_error
1416int
1417PerlIO_error(PerlIO *f)
1418{
14a5cf38
JH		 1419 if (f && *f)
1420 return (*PerlIOBase(f)->tab->Error) (f);
1421 else {
1422 SETERRNO(EBADF, SS$_IVCHAN);
1423 return -1;
1424 }
9e353e3b
NIS		 1425}
1426
1427#undef PerlIO_clearerr
1428void
1429PerlIO_clearerr(PerlIO *f)
1430{
14a5cf38
JH		 1431 if (f && *f)
1432 (*PerlIOBase(f)->tab->Clearerr) (f);
1433 else
1434 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1435}
1436
1437#undef PerlIO_setlinebuf
1438void
1439PerlIO_setlinebuf(PerlIO *f)
1440{
14a5cf38
JH		 1441 if (f && *f)
1442 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1443 else
1444 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1445}
1446
1447#undef PerlIO_has_base
1448int
1449PerlIO_has_base(PerlIO *f)
1450{
14a5cf38
JH		 1451 if (f && *f) {
1452 return (PerlIOBase(f)->tab->Get_base != NULL);
1453 }
1454 return 0;
760ac839
LW		 1455}
1456
9e353e3b
NIS		 1457#undef PerlIO_fast_gets
1458int
1459PerlIO_fast_gets(PerlIO *f)
760ac839 1460{
14a5cf38
JH		 1461 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1462 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1463 return (tab->Set_ptrcnt != NULL);
1464 }
1465 return 0;
9e353e3b
NIS		 1466}
1467
1468#undef PerlIO_has_cntptr
1469int
1470PerlIO_has_cntptr(PerlIO *f)
1471{
14a5cf38
JH		 1472 if (f && *f) {
1473 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1474 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1475 }
1476 return 0;
9e353e3b
NIS		 1477}
1478
1479#undef PerlIO_canset_cnt
1480int
1481PerlIO_canset_cnt(PerlIO *f)
1482{
14a5cf38
JH		 1483 if (f && *f) {
1484 PerlIOl *l = PerlIOBase(f);
1485 return (l->tab->Set_ptrcnt != NULL);
1486 }
1487 return 0;
760ac839
LW		 1488}
1489
1490#undef PerlIO_get_base
888911fc 1491STDCHAR *
a20bf0c3 1492PerlIO_get_base(PerlIO *f)
760ac839 1493{
14a5cf38
JH		 1494 if (f && *f)
1495 return (*PerlIOBase(f)->tab->Get_base) (f);
1496 return NULL;
9e353e3b
NIS		 1497}
1498
1499#undef PerlIO_get_bufsiz
1500int
1501PerlIO_get_bufsiz(PerlIO *f)
1502{
14a5cf38
JH		 1503 if (f && *f)
1504 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1505 return 0;
9e353e3b
NIS		 1506}
1507
1508#undef PerlIO_get_ptr
1509STDCHAR *
1510PerlIO_get_ptr(PerlIO *f)
1511{
14a5cf38
JH		 1512 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1513 if (tab->Get_ptr == NULL)
1514 return NULL;
1515 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1516}
1517
1518#undef PerlIO_get_cnt
05d1247b 1519int
9e353e3b
NIS		 1520PerlIO_get_cnt(PerlIO *f)
1521{
14a5cf38
JH		 1522 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1523 if (tab->Get_cnt == NULL)
1524 return 0;
1525 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1526}
1527
1528#undef PerlIO_set_cnt
1529void
14a5cf38 1530PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1531{
14a5cf38 1532 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1533}
1534
1535#undef PerlIO_set_ptrcnt
1536void
14a5cf38 1537PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1538{
14a5cf38
JH		 1539 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1540 if (tab->Set_ptrcnt == NULL) {
1541 dTHX;
1542 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1543 }
1544 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1545}
1546
1547/*--------------------------------------------------------------------------------------*/
14a5cf38 1548/*
71200d45 1549 * utf8 and raw dummy layers
14a5cf38 1550 */
dfebf958 1551
26fb694e 1552IV
e3f3bf95 1553PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1554{
14a5cf38
JH		 1555 if (PerlIONext(f)) {
1556 dTHX;
1557 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1558 PerlIO_pop(aTHX_ f);
1559 if (tab->kind & PERLIO_K_UTF8)
1560 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1561 else
1562 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1563 return 0;
1564 }
1565 return -1;
26fb694e
NIS		 1566}
1567
dfebf958 1568PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1569 "utf8",
1570 sizeof(PerlIOl),
1571 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1572 PerlIOUtf8_pushed,
1573 NULL,
1574 NULL,
1575 NULL,
1576 NULL,
1577 NULL,
1578 NULL,
1579 NULL,
1580 NULL,
1581 NULL,
1582 NULL,
1583 NULL, /* flush */
1584 NULL, /* fill */
1585 NULL,
1586 NULL,
1587 NULL,
1588 NULL,
1589 NULL, /* get_base */
1590 NULL, /* get_bufsiz */
1591 NULL, /* get_ptr */
1592 NULL, /* get_cnt */
1593 NULL, /* set_ptrcnt */
26fb694e
NIS		 1594};
1595
1596PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1597 "bytes",
1598 sizeof(PerlIOl),
1599 PERLIO_K_DUMMY,
1600 PerlIOUtf8_pushed,
1601 NULL,
1602 NULL,
1603 NULL,
1604 NULL,
1605 NULL,
1606 NULL,
1607 NULL,
1608 NULL,
1609 NULL,
1610 NULL,
1611 NULL, /* flush */
1612 NULL, /* fill */
1613 NULL,
1614 NULL,
1615 NULL,
1616 NULL,
1617 NULL, /* get_base */
1618 NULL, /* get_bufsiz */
1619 NULL, /* get_ptr */
1620 NULL, /* get_cnt */
1621 NULL, /* set_ptrcnt */
dfebf958
NIS		 1622};
1623
1624PerlIO *
14a5cf38
JH		 1625PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1626 IV n, const char *mode, int fd, int imode, int perm,
1627 PerlIO *old, int narg, SV **args)
dfebf958 1628{
14a5cf38
JH		 1629 PerlIO_funcs *tab = PerlIO_default_btm();
1630 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1631 old, narg, args);
dfebf958
NIS		 1632}
1633
1634PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1635 "raw",
1636 sizeof(PerlIOl),
1637 PERLIO_K_DUMMY,
1638 PerlIORaw_pushed,
1639 PerlIOBase_popped,
1640 PerlIORaw_open,
1641 NULL,
1642 NULL,
1643 NULL,
1644 NULL,
1645 NULL,
1646 NULL,
1647 NULL,
1648 NULL,
1649 NULL, /* flush */
1650 NULL, /* fill */
1651 NULL,
1652 NULL,
1653 NULL,
1654 NULL,
1655 NULL, /* get_base */
1656 NULL, /* get_bufsiz */
1657 NULL, /* get_ptr */
1658 NULL, /* get_cnt */
1659 NULL, /* set_ptrcnt */
dfebf958
NIS		 1660};
1661/*--------------------------------------------------------------------------------------*/
1662/*--------------------------------------------------------------------------------------*/
14a5cf38 1663/*
71200d45 1664 * "Methods" of the "base class"
14a5cf38 1665 */
9e353e3b
NIS		 1666
1667IV
1668PerlIOBase_fileno(PerlIO *f)
1669{
14a5cf38 1670 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1671}
1672
f5b9d040 1673char *
14a5cf38
JH		 1674PerlIO_modestr(PerlIO *f, char *buf)
1675{
1676 char *s = buf;
1677 IV flags = PerlIOBase(f)->flags;
1678 if (flags & PERLIO_F_APPEND) {
1679 *s++ = 'a';
1680 if (flags & PERLIO_F_CANREAD) {
1681 *s++ = '+';
1682 }
1683 }
1684 else if (flags & PERLIO_F_CANREAD) {
1685 *s++ = 'r';
1686 if (flags & PERLIO_F_CANWRITE)
1687 *s++ = '+';
1688 }
1689 else if (flags & PERLIO_F_CANWRITE) {
1690 *s++ = 'w';
1691 if (flags & PERLIO_F_CANREAD) {
1692 *s++ = '+';
1693 }
1694 }
5f1a76d0 1695#if O_TEXT != O_BINARY
14a5cf38
JH		 1696 if (!(flags & PERLIO_F_CRLF))
1697 *s++ = 'b';
5f1a76d0 1698#endif
14a5cf38
JH		 1699 *s = '\0';
1700 return buf;
f5b9d040
NIS		 1701}
1702
76ced9ad 1703IV
e3f3bf95 1704PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1705{
14a5cf38 1706 PerlIOl *l = PerlIOBase(f);
b7953727 1707#if 0
14a5cf38
JH		 1708 const char *omode = mode;
1709 char temp[8];
b7953727 1710#endif
14a5cf38
JH		 1711 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1712 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1713 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1714 if (tab->Set_ptrcnt != NULL)
1715 l->flags |= PERLIO_F_FASTGETS;
1716 if (mode) {
1717 if (*mode == '#' || *mode == 'I')
1718 mode++;
1719 switch (*mode++) {
1720 case 'r':
1721 l->flags |= PERLIO_F_CANREAD;
1722 break;
1723 case 'a':
1724 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1725 break;
1726 case 'w':
1727 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1728 break;
1729 default:
1730 SETERRNO(EINVAL, LIB$_INVARG);
1731 return -1;
1732 }
1733 while (*mode) {
1734 switch (*mode++) {
1735 case '+':
1736 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1737 break;
1738 case 'b':
1739 l->flags &= ~PERLIO_F_CRLF;
1740 break;
1741 case 't':
1742 l->flags |= PERLIO_F_CRLF;
1743 break;
1744 default:
1745 SETERRNO(EINVAL, LIB$_INVARG);
1746 return -1;
1747 }
1748 }
1749 }
1750 else {
1751 if (l->next) {
1752 l->flags |= l->next->flags &
1753 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1754 PERLIO_F_APPEND);
1755 }
1756 }
5e2ab84b 1757#if 0
14a5cf38
JH		 1758 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1759 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1760 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1761#endif
14a5cf38 1762 return 0;
76ced9ad
NIS		 1763}
1764
1765IV
1766PerlIOBase_popped(PerlIO *f)
1767{
14a5cf38 1768 return 0;
760ac839
LW		 1769}
1770
9e353e3b
NIS		 1771SSize_t
1772PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1773{
14a5cf38
JH		 1774 dTHX;
1775 /*
71200d45 1776 * Save the position as current head considers it
14a5cf38
JH		 1777 */
1778 Off_t old = PerlIO_tell(f);
1779 SSize_t done;
1780 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1781 PerlIOSelf(f, PerlIOBuf)->posn = old;
1782 done = PerlIOBuf_unread(f, vbuf, count);
1783 return done;
9e353e3b
NIS		 1784}
1785
f6c77cf1
NIS		 1786SSize_t
1787PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1788{
14a5cf38
JH		 1789 STDCHAR *buf = (STDCHAR *) vbuf;
1790 if (f) {
1791 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1792 return 0;
1793 while (count > 0) {
1794 SSize_t avail = PerlIO_get_cnt(f);
1795 SSize_t take = 0;
1796 if (avail > 0)
1797 take = (count < avail) ? count : avail;
1798 if (take > 0) {
1799 STDCHAR *ptr = PerlIO_get_ptr(f);
1800 Copy(ptr, buf, take, STDCHAR);
1801 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1802 count -= take;
1803 buf += take;
1804 }
1805 if (count > 0 && avail <= 0) {
1806 if (PerlIO_fill(f) != 0)
1807 break;
1808 }
1809 }
1810 return (buf - (STDCHAR *) vbuf);
1811 }
f6c77cf1 1812 return 0;
f6c77cf1
NIS		 1813}
1814
9e353e3b 1815IV
06da4f11 1816PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1817{
14a5cf38 1818 return 0;
9e353e3b
NIS		 1819}
1820
1821IV
06da4f11
NIS		 1822PerlIOBase_noop_fail(PerlIO *f)
1823{
14a5cf38 1824 return -1;
06da4f11
NIS		 1825}
1826
1827IV
9e353e3b
NIS		 1828PerlIOBase_close(PerlIO *f)
1829{
14a5cf38
JH		 1830 IV code = 0;
1831 PerlIO *n = PerlIONext(f);
1832 if (PerlIO_flush(f) != 0)
1833 code = -1;
1834 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1835 code = -1;
1836 PerlIOBase(f)->flags &=
1837 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1838 return code;
9e353e3b
NIS		 1839}
1840
1841IV
1842PerlIOBase_eof(PerlIO *f)
1843{
14a5cf38
JH		 1844 if (f && *f) {
1845 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1846 }
1847 return 1;
9e353e3b
NIS		 1848}
1849
1850IV
1851PerlIOBase_error(PerlIO *f)
1852{
14a5cf38
JH		 1853 if (f && *f) {
1854 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1855 }
1856 return 1;
9e353e3b
NIS		 1857}
1858
1859void
1860PerlIOBase_clearerr(PerlIO *f)
1861{
14a5cf38
JH		 1862 if (f && *f) {
1863 PerlIO *n = PerlIONext(f);
1864 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1865 if (n)
1866 PerlIO_clearerr(n);
1867 }
9e353e3b
NIS		 1868}
1869
1870void
1871PerlIOBase_setlinebuf(PerlIO *f)
1872{
14a5cf38
JH		 1873 if (f) {
1874 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1875 }
9e353e3b
NIS		 1876}
1877
9e353e3b 1878/*--------------------------------------------------------------------------------------*/
14a5cf38 1879/*
71200d45 1880 * Bottom-most level for UNIX-like case
14a5cf38 1881 */
9e353e3b 1882
14a5cf38
JH		 1883typedef struct {
1884 struct _PerlIO base; /* The generic part */
1885 int fd; /* UNIX like file descriptor */
1886 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 1887} PerlIOUnix;
1888
6f9d8c32 1889int
9e353e3b 1890PerlIOUnix_oflags(const char *mode)
760ac839 1891{
14a5cf38
JH		 1892 int oflags = -1;
1893 if (*mode == 'I' || *mode == '#')
1894 mode++;
1895 switch (*mode) {
1896 case 'r':
1897 oflags = O_RDONLY;
1898 if (*++mode == '+') {
1899 oflags = O_RDWR;
1900 mode++;
1901 }
1902 break;
1903
1904 case 'w':
1905 oflags = O_CREAT | O_TRUNC;
1906 if (*++mode == '+') {
1907 oflags |= O_RDWR;
1908 mode++;
1909 }
1910 else
1911 oflags |= O_WRONLY;
1912 break;
1913
1914 case 'a':
1915 oflags = O_CREAT | O_APPEND;
1916 if (*++mode == '+') {
1917 oflags |= O_RDWR;
1918 mode++;
1919 }
1920 else
1921 oflags |= O_WRONLY;
1922 break;
1923 }
1924 if (*mode == 'b') {
1925 oflags |= O_BINARY;
1926 oflags &= ~O_TEXT;
1927 mode++;
1928 }
1929 else if (*mode == 't') {
1930 oflags |= O_TEXT;
1931 oflags &= ~O_BINARY;
1932 mode++;
1933 }
1934 /*
71200d45 1935 * Always open in binary mode
14a5cf38
JH		 1936 */
1937 oflags |= O_BINARY;
1938 if (*mode || oflags == -1) {
1939 SETERRNO(EINVAL, LIB$_INVARG);
1940 oflags = -1;
1941 }
1942 return oflags;
9e353e3b
NIS		 1943}
1944
1945IV
1946PerlIOUnix_fileno(PerlIO *f)
1947{
14a5cf38 1948 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 1949}
1950
4b803d04 1951IV
e3f3bf95 1952PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 1953{
14a5cf38
JH		 1954 IV code = PerlIOBase_pushed(f, mode, arg);
1955 if (*PerlIONext(f)) {
1956 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
1957 s->fd = PerlIO_fileno(PerlIONext(f));
1958 /*
71200d45 1959 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 1960 * handle rather than believing the "mode" we are passed in? XXX
71200d45 1961 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 1962 */
1963 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
1964 }
1965 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
1966 return code;
4b803d04
NIS		 1967}
1968
9e353e3b 1969PerlIO *
14a5cf38
JH		 1970PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1971 IV n, const char *mode, int fd, int imode,
1972 int perm, PerlIO *f, int narg, SV **args)
1973{
1974 if (f) {
1975 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
1976 (*PerlIOBase(f)->tab->Close) (f);
1977 }
1978 if (narg > 0) {
1979 char *path = SvPV_nolen(*args);
1980 if (*mode == '#')
1981 mode++;
1982 else {
1983 imode = PerlIOUnix_oflags(mode);
1984 perm = 0666;
1985 }
1986 if (imode != -1) {
1987 fd = PerlLIO_open3(path, imode, perm);
1988 }
1989 }
1990 if (fd >= 0) {
1991 PerlIOUnix *s;
1992 if (*mode == 'I')
1993 mode++;
1994 if (!f) {
1995 f = PerlIO_allocate(aTHX);
1996 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
1997 PerlIOUnix);
1998 }
1999 else
2000 s = PerlIOSelf(f, PerlIOUnix);
2001 s->fd = fd;
2002 s->oflags = imode;
2003 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2004 return f;
2005 }
2006 else {
2007 if (f) {
2008 /*
71200d45 2009 * FIXME: pop layers ???
14a5cf38
JH		 2010 */
2011 }
2012 return NULL;
2013 }
9e353e3b
NIS		 2014}
2015
8cf8f3d1
NIS		 2016SV *
2017PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
71200d45 2018{
8cf8f3d1
NIS		 2019 if (!arg)
2020 return Nullsv;
71200d45 2021#ifdef sv_dup
8cf8f3d1
NIS		 2022 if (param) {
2023 return sv_dup(arg, param);
2024 }
2025 else {
2026 return newSVsv(arg);
2027 }
2028#else
2029 return newSVsv(arg);
71200d45 2030#endif
8cf8f3d1
NIS		 2031}
2032
2033PerlIO *
2034PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2035{
2036 PerlIO *nexto = PerlIONext(o);
2037 if (*nexto) {
2038 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2039 f = (*tab->Dup)(aTHX_ f, nexto, param);
71200d45 2040 }
8cf8f3d1
NIS		 2041 if (f) {
2042 PerlIO_funcs *self = PerlIOBase(o)->tab;
2043 SV *arg = Nullsv;
2044 char buf[8];
b77c74bc 2045 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
8cf8f3d1
NIS		 2046 if (self->Getarg) {
2047 arg = (*self->Getarg)(o);
2048 if (arg) {
2049 arg = PerlIO_sv_dup(aTHX_ arg, param);
2050 }
2051 }
2052 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2053 if (!f && arg) {
2054 SvREFCNT_dec(arg);
2055 }
71200d45 2056 }
71200d45
NIS		 2057 return f;
2058}
2059
2060PerlIO *
8cf8f3d1 2061PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2062{
2063 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2064 int fd = PerlLIO_dup(os->fd);
2065 if (fd >= 0) {
2066 f = PerlIOBase_dup(aTHX_ f, o, param);
2067 if (f) {
2068 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2069 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2070 s->fd = fd;
2071 return f;
2072 }
2073 else {
2074 PerlLIO_close(fd);
2075 }
2076 }
2077 return NULL;
2078}
2079
2080
9e353e3b
NIS		 2081SSize_t
2082PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2083{
14a5cf38
JH		 2084 dTHX;
2085 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2086 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2087 return 0;
2088 while (1) {
2089 SSize_t len = PerlLIO_read(fd, vbuf, count);
2090 if (len >= 0 || errno != EINTR) {
2091 if (len < 0)
2092 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2093 else if (len == 0 && count != 0)
2094 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2095 return len;
2096 }
2097 PERL_ASYNC_CHECK();
2098 }
9e353e3b
NIS		 2099}
2100
2101SSize_t
2102PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2103{
14a5cf38
JH		 2104 dTHX;
2105 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2106 while (1) {
2107 SSize_t len = PerlLIO_write(fd, vbuf, count);
2108 if (len >= 0 || errno != EINTR) {
2109 if (len < 0)
2110 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2111 return len;
2112 }
2113 PERL_ASYNC_CHECK();
06da4f11 2114 }
9e353e3b
NIS		 2115}
2116
2117IV
2118PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2119{
14a5cf38
JH		 2120 dSYS;
2121 Off_t new =
2122 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2123 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2124 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2125}
2126
2127Off_t
2128PerlIOUnix_tell(PerlIO *f)
2129{
14a5cf38
JH		 2130 dSYS;
2131 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2132}
2133
71200d45 2134
9e353e3b
NIS		 2135IV
2136PerlIOUnix_close(PerlIO *f)
2137{
14a5cf38
JH		 2138 dTHX;
2139 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2140 int code = 0;
2141 while (PerlLIO_close(fd) != 0) {
2142 if (errno != EINTR) {
2143 code = -1;
2144 break;
2145 }
2146 PERL_ASYNC_CHECK();
2147 }
2148 if (code == 0) {
2149 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2150 }
2151 return code;
9e353e3b
NIS		 2152}
2153
2154PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2155 "unix",
2156 sizeof(PerlIOUnix),
2157 PERLIO_K_RAW,
2158 PerlIOUnix_pushed,
2159 PerlIOBase_noop_ok,
2160 PerlIOUnix_open,
2161 NULL,
2162 PerlIOUnix_fileno,
71200d45 2163 PerlIOUnix_dup,
14a5cf38
JH		 2164 PerlIOUnix_read,
2165 PerlIOBase_unread,
2166 PerlIOUnix_write,
2167 PerlIOUnix_seek,
2168 PerlIOUnix_tell,
2169 PerlIOUnix_close,
2170 PerlIOBase_noop_ok, /* flush */
2171 PerlIOBase_noop_fail, /* fill */
2172 PerlIOBase_eof,
2173 PerlIOBase_error,
2174 PerlIOBase_clearerr,
2175 PerlIOBase_setlinebuf,
2176 NULL, /* get_base */
2177 NULL, /* get_bufsiz */
2178 NULL, /* get_ptr */
2179 NULL, /* get_cnt */
2180 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2181};
2182
2183/*--------------------------------------------------------------------------------------*/
14a5cf38 2184/*
71200d45 2185 * stdio as a layer
14a5cf38 2186 */
9e353e3b 2187
14a5cf38
JH		 2188typedef struct {
2189 struct _PerlIO base;
2190 FILE *stdio; /* The stream */
9e353e3b
NIS		 2191} PerlIOStdio;
2192
2193IV
2194PerlIOStdio_fileno(PerlIO *f)
2195{
14a5cf38
JH		 2196 dSYS;
2197 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2198}
2199
766a733e 2200char *
14a5cf38
JH		 2201PerlIOStdio_mode(const char *mode, char *tmode)
2202{
2203 char *ret = tmode;
2204 while (*mode) {
2205 *tmode++ = *mode++;
2206 }
2207 if (O_BINARY != O_TEXT) {
2208 *tmode++ = 'b';
2209 }
2210 *tmode = '\0';
2211 return ret;
2212}
2213
2214/*
71200d45 2215 * This isn't used yet ...
14a5cf38 2216 */
4b803d04 2217IV
e3f3bf95 2218PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2219{
14a5cf38
JH		 2220 if (*PerlIONext(f)) {
2221 dSYS;
2222 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2223 char tmode[8];
2224 FILE *stdio =
2225 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2226 PerlIOStdio_mode(mode, tmode));
2227 if (stdio)
2228 s->stdio = stdio;
2229 else
2230 return -1;
2231 }
2232 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2233}
2234
9e353e3b
NIS		 2235#undef PerlIO_importFILE
2236PerlIO *
2237PerlIO_importFILE(FILE *stdio, int fl)
2238{
14a5cf38
JH		 2239 dTHX;
2240 PerlIO *f = NULL;
2241 if (stdio) {
2242 PerlIOStdio *s =
2243 PerlIOSelf(PerlIO_push
2244 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2245 "r+", Nullsv), PerlIOStdio);
2246 s->stdio = stdio;
2247 }
2248 return f;
9e353e3b
NIS		 2249}
2250
2251PerlIO *
14a5cf38
JH		 2252PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2253 IV n, const char *mode, int fd, int imode,
2254 int perm, PerlIO *f, int narg, SV **args)
2255{
2256 char tmode[8];
2257 if (f) {
2258 char *path = SvPV_nolen(*args);
2259 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2260 FILE *stdio =
2261 PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2262 s->stdio);
2263 if (!s->stdio)
2264 return NULL;
2265 s->stdio = stdio;
2266 return f;
2267 }
2268 else {
2269 if (narg > 0) {
2270 char *path = SvPV_nolen(*args);
2271 if (*mode == '#') {
2272 mode++;
2273 fd = PerlLIO_open3(path, imode, perm);
2274 }
2275 else {
2276 FILE *stdio = PerlSIO_fopen(path, mode);
2277 if (stdio) {
2278 PerlIOStdio *s =
2279 PerlIOSelf(PerlIO_push
2280 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2281 (mode = PerlIOStdio_mode(mode, tmode)),
2282 PerlIOArg),
2283 PerlIOStdio);
2284 s->stdio = stdio;
2285 }
2286 return f;
2287 }
2288 }
2289 if (fd >= 0) {
2290 FILE *stdio = NULL;
2291 int init = 0;
2292 if (*mode == 'I') {
2293 init = 1;
2294 mode++;
2295 }
2296 if (init) {
2297 switch (fd) {
2298 case 0:
2299 stdio = PerlSIO_stdin;
2300 break;
2301 case 1:
2302 stdio = PerlSIO_stdout;
2303 break;
2304 case 2:
2305 stdio = PerlSIO_stderr;
2306 break;
2307 }
2308 }
2309 else {
2310 stdio = PerlSIO_fdopen(fd, mode =
2311 PerlIOStdio_mode(mode, tmode));
2312 }
2313 if (stdio) {
2314 PerlIOStdio *s =
2315 PerlIOSelf(PerlIO_push
2316 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2317 mode, PerlIOArg), PerlIOStdio);
2318 s->stdio = stdio;
2319 return f;
2320 }
2321 }
2322 }
ee518936 2323 return NULL;
9e353e3b
NIS		 2324}
2325
2326SSize_t
2327PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2328{
14a5cf38
JH		 2329 dSYS;
2330 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2331 SSize_t got = 0;
2332 if (count == 1) {
2333 STDCHAR *buf = (STDCHAR *) vbuf;
2334 /*
2335 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2336 * stdio does not do that for fread()
14a5cf38
JH		 2337 */
2338 int ch = PerlSIO_fgetc(s);
2339 if (ch != EOF) {
2340 *buf = ch;
2341 got = 1;
2342 }
2343 }
2344 else
2345 got = PerlSIO_fread(vbuf, 1, count, s);
2346 return got;
9e353e3b
NIS		 2347}
2348
2349SSize_t
2350PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2351{
14a5cf38
JH		 2352 dSYS;
2353 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2354 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2355 SSize_t unread = 0;
2356 while (count > 0) {
2357 int ch = *buf-- & 0xff;
2358 if (PerlSIO_ungetc(ch, s) != ch)
2359 break;
2360 unread++;
2361 count--;
2362 }
2363 return unread;
9e353e3b
NIS		 2364}
2365
2366SSize_t
2367PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2368{
14a5cf38
JH		 2369 dSYS;
2370 return PerlSIO_fwrite(vbuf, 1, count,
2371 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2372}
2373
2374IV
2375PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2376{
14a5cf38
JH		 2377 dSYS;
2378 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2379 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2380}
2381
2382Off_t
2383PerlIOStdio_tell(PerlIO *f)
2384{
14a5cf38
JH		 2385 dSYS;
2386 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2387 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2388}
2389
2390IV
2391PerlIOStdio_close(PerlIO *f)
2392{
14a5cf38 2393 dSYS;
af130d45 2394#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2395 int optval;
2396 Sock_size_t optlen = sizeof(int);
8e4bc33b 2397#endif
14a5cf38
JH		 2398 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2399 return (
af130d45 2400#ifdef SOCKS5_VERSION_NAME
14a5cf38
JH		 2401 (getsockopt
2402 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2403 &optlen) <
2404 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
8e4bc33b 2405#else
14a5cf38 2406 PerlSIO_fclose(stdio)
8e4bc33b 2407#endif
14a5cf38 2408 );
8e4bc33b 2409
9e353e3b
NIS		 2410}
2411
2412IV
2413PerlIOStdio_flush(PerlIO *f)
2414{
14a5cf38
JH		 2415 dSYS;
2416 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2417 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2418 return PerlSIO_fflush(stdio);
2419 }
2420 else {
88b61e10 2421#if 0
14a5cf38
JH		 2422 /*
2423 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2424 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2425 * design is to do _this_ but not have layer above flush this
71200d45 2426 * layer read-to-read
14a5cf38
JH		 2427 */
2428 /*
71200d45 2429 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2430 */
2431 int err = errno;
2432 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2433 errno = err;
88b61e10 2434#endif
14a5cf38
JH		 2435 }
2436 return 0;
9e353e3b
NIS		 2437}
2438
2439IV
06da4f11
NIS		 2440PerlIOStdio_fill(PerlIO *f)
2441{
14a5cf38
JH		 2442 dSYS;
2443 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2444 int c;
2445 /*
71200d45 2446 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2447 */
2448 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2449 if (PerlSIO_fflush(stdio) != 0)
2450 return EOF;
2451 }
2452 c = PerlSIO_fgetc(stdio);
2453 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2454 return EOF;
2455 return 0;
06da4f11
NIS		 2456}
2457
2458IV
9e353e3b
NIS		 2459PerlIOStdio_eof(PerlIO *f)
2460{
14a5cf38
JH		 2461 dSYS;
2462 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2463}
2464
2465IV
2466PerlIOStdio_error(PerlIO *f)
2467{
14a5cf38
JH		 2468 dSYS;
2469 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2470}
2471
2472void
2473PerlIOStdio_clearerr(PerlIO *f)
2474{
14a5cf38
JH		 2475 dSYS;
2476 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2477}
2478
2479void
2480PerlIOStdio_setlinebuf(PerlIO *f)
2481{
14a5cf38 2482 dSYS;
9e353e3b 2483#ifdef HAS_SETLINEBUF
14a5cf38 2484 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2485#else
14a5cf38 2486 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2487#endif
2488}
2489
2490#ifdef FILE_base
2491STDCHAR *
2492PerlIOStdio_get_base(PerlIO *f)
2493{
14a5cf38
JH		 2494 dSYS;
2495 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2496 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2497}
2498
2499Size_t
2500PerlIOStdio_get_bufsiz(PerlIO *f)
2501{
14a5cf38
JH		 2502 dSYS;
2503 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2504 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2505}
2506#endif
2507
2508#ifdef USE_STDIO_PTR
2509STDCHAR *
2510PerlIOStdio_get_ptr(PerlIO *f)
2511{
14a5cf38
JH		 2512 dSYS;
2513 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2514 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2515}
2516
2517SSize_t
2518PerlIOStdio_get_cnt(PerlIO *f)
2519{
14a5cf38
JH		 2520 dSYS;
2521 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2522 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2523}
2524
2525void
14a5cf38 2526PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2527{
14a5cf38
JH		 2528 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2529 dSYS;
2530 if (ptr != NULL) {
9e353e3b 2531#ifdef STDIO_PTR_LVALUE
14a5cf38 2532 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2533#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2534 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2535 dTHX;
2536 assert(PerlSIO_get_cnt(stdio) == (cnt));
2537 }
9e353e3b
NIS		 2538#endif
2539#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2540 /*
71200d45 2541 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2542 */
2543 return;
9e353e3b 2544#endif
14a5cf38
JH		 2545#else /* STDIO_PTR_LVALUE */
2546 PerlProc_abort();
2547#endif /* STDIO_PTR_LVALUE */
2548 }
2549 /*
71200d45 2550 * Now (or only) set cnt
14a5cf38 2551 */
9e353e3b 2552#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2553 PerlSIO_set_cnt(stdio, cnt);
2554#else /* STDIO_CNT_LVALUE */
9e353e3b 2555#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2556 PerlSIO_set_ptr(stdio,
2557 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2558 cnt));
2559#else /* STDIO_PTR_LVAL_SETS_CNT */
2560 PerlProc_abort();
2561#endif /* STDIO_PTR_LVAL_SETS_CNT */
2562#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2563}
2564
2565#endif
2566
71200d45 2567PerlIO *
8cf8f3d1 2568PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 2569{
b77c74bc
NIS		 2570 /* This assumes no layers underneath - which is what
2571 happens, but is not how I remember it. NI-S 2001/10/16
2572 */
2573 int fd = PerlLIO_dup(PerlIO_fileno(o));
2574 if (fd >= 0) {
2575 char buf[8];
2576 FILE *stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o, buf));
2577 if (stdio) {
2578 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2579 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2580 }
2581 else {
2582 PerlSIO_fclose(stdio);
2583 }
2584 }
2585 else {
2586 PerlLIO_close(fd);
2587 f = NULL;
2588 }
2589 }
2590 return f;
71200d45
NIS		 2591}
2592
9e353e3b 2593PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2594 "stdio",
2595 sizeof(PerlIOStdio),
2596 PERLIO_K_BUFFERED,
2597 PerlIOBase_pushed,
2598 PerlIOBase_noop_ok,
2599 PerlIOStdio_open,
2600 NULL,
2601 PerlIOStdio_fileno,
71200d45 2602 PerlIOStdio_dup,
14a5cf38
JH		 2603 PerlIOStdio_read,
2604 PerlIOStdio_unread,
2605 PerlIOStdio_write,
2606 PerlIOStdio_seek,
2607 PerlIOStdio_tell,
2608 PerlIOStdio_close,
2609 PerlIOStdio_flush,
2610 PerlIOStdio_fill,
2611 PerlIOStdio_eof,
2612 PerlIOStdio_error,
2613 PerlIOStdio_clearerr,
2614 PerlIOStdio_setlinebuf,
9e353e3b 2615#ifdef FILE_base
14a5cf38
JH		 2616 PerlIOStdio_get_base,
2617 PerlIOStdio_get_bufsiz,
9e353e3b 2618#else
14a5cf38
JH		 2619 NULL,
2620 NULL,
9e353e3b
NIS		 2621#endif
2622#ifdef USE_STDIO_PTR
14a5cf38
JH		 2623 PerlIOStdio_get_ptr,
2624 PerlIOStdio_get_cnt,
0eb1d8a4 2625#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2626 PerlIOStdio_set_ptrcnt
2627#else /* STDIO_PTR_LVALUE */
2628 NULL
2629#endif /* STDIO_PTR_LVALUE */
2630#else /* USE_STDIO_PTR */
2631 NULL,
2632 NULL,
2633 NULL
2634#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2635};
2636
2637#undef PerlIO_exportFILE
2638FILE *
2639PerlIO_exportFILE(PerlIO *f, int fl)
2640{
14a5cf38
JH		 2641 FILE *stdio;
2642 PerlIO_flush(f);
2643 stdio = fdopen(PerlIO_fileno(f), "r+");
2644 if (stdio) {
2645 dTHX;
2646 PerlIOStdio *s =
2647 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2648 PerlIOStdio);
2649 s->stdio = stdio;
2650 }
2651 return stdio;
9e353e3b
NIS		 2652}
2653
2654#undef PerlIO_findFILE
2655FILE *
2656PerlIO_findFILE(PerlIO *f)
2657{
14a5cf38
JH		 2658 PerlIOl *l = *f;
2659 while (l) {
2660 if (l->tab == &PerlIO_stdio) {
2661 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2662 return s->stdio;
2663 }
2664 l = *PerlIONext(&l);
f7e7eb72 2665 }
14a5cf38 2666 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2667}
2668
2669#undef PerlIO_releaseFILE
2670void
2671PerlIO_releaseFILE(PerlIO *p, FILE *f)
2672{
2673}
2674
2675/*--------------------------------------------------------------------------------------*/
14a5cf38 2676/*
71200d45 2677 * perlio buffer layer
14a5cf38 2678 */
9e353e3b 2679
5e2ab84b 2680IV
e3f3bf95 2681PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2682{
14a5cf38
JH		 2683 dSYS;
2684 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2685 int fd = PerlIO_fileno(f);
2686 Off_t posn;
2687 if (fd >= 0 && PerlLIO_isatty(fd)) {
2688 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2689 }
2690 posn = PerlIO_tell(PerlIONext(f));
2691 if (posn != (Off_t) - 1) {
2692 b->posn = posn;
2693 }
2694 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2695}
2696
9e353e3b 2697PerlIO *
14a5cf38
JH		 2698PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2699 IV n, const char *mode, int fd, int imode, int perm,
2700 PerlIO *f, int narg, SV **args)
2701{
2702 if (f) {
2703 PerlIO *next = PerlIONext(f);
2704 PerlIO_funcs *tab =
2705 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2706 next =
2707 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2708 next, narg, args);
2709 if (!next
2710 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2711 return NULL;
2712 }
2713 }
2714 else {
2715 PerlIO_funcs *tab =
2716 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2717 int init = 0;
2718 if (*mode == 'I') {
2719 init = 1;
2720 /*
71200d45 2721 * mode++;
14a5cf38
JH		 2722 */
2723 }
2724 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2725 NULL, narg, args);
2726 if (f) {
2727 PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2728 fd = PerlIO_fileno(f);
ee518936 2729#if O_BINARY != O_TEXT
14a5cf38 2730 /*
71200d45 2731 * do something about failing setmode()? --jhi
14a5cf38
JH		 2732 */
2733 PerlLIO_setmode(fd, O_BINARY);
ee518936 2734#endif
14a5cf38
JH		 2735 if (init && fd == 2) {
2736 /*
71200d45 2737 * Initial stderr is unbuffered
14a5cf38
JH		 2738 */
2739 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2740 }
2741 }
ee518936 2742 }
14a5cf38 2743 return f;
9e353e3b
NIS		 2744}
2745
14a5cf38
JH		 2746/*
2747 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2748 * read or write state
14a5cf38 2749 */
9e353e3b
NIS		 2750IV
2751PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2752{
14a5cf38
JH		 2753 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2754 int code = 0;
2755 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2756 /*
71200d45 2757 * write() the buffer
14a5cf38
JH		 2758 */
2759 STDCHAR *buf = b->buf;
2760 STDCHAR *p = buf;
2761 PerlIO *n = PerlIONext(f);
2762 while (p < b->ptr) {
2763 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2764 if (count > 0) {
2765 p += count;
2766 }
2767 else if (count < 0 || PerlIO_error(n)) {
2768 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2769 code = -1;
2770 break;
2771 }
2772 }
2773 b->posn += (p - buf);
2774 }
2775 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2776 STDCHAR *buf = PerlIO_get_base(f);
2777 /*
71200d45 2778 * Note position change
14a5cf38
JH		 2779 */
2780 b->posn += (b->ptr - buf);
2781 if (b->ptr < b->end) {
2782 /*
71200d45 2783 * We did not consume all of it
14a5cf38
JH		 2784 */
2785 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2786 b->posn = PerlIO_tell(PerlIONext(f));
2787 }
2788 }
2789 }
2790 b->ptr = b->end = b->buf;
2791 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2792 /*
71200d45 2793 * FIXME: Is this right for read case ?
14a5cf38
JH		 2794 */
2795 if (PerlIO_flush(PerlIONext(f)) != 0)
2796 code = -1;
2797 return code;
6f9d8c32
NIS		 2798}
2799
06da4f11
NIS		 2800IV
2801PerlIOBuf_fill(PerlIO *f)
2802{
14a5cf38
JH		 2803 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2804 PerlIO *n = PerlIONext(f);
2805 SSize_t avail;
2806 /*
2807 * FIXME: doing the down-stream flush is a bad idea if it causes
2808 * pre-read data in stdio buffer to be discarded but this is too
2809 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2810 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2811 */
2812 if (PerlIO_flush(f) != 0)
2813 return -1;
2814 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2815 PerlIOBase_flush_linebuf();
2816
2817 if (!b->buf)
2818 PerlIO_get_base(f); /* allocate via vtable */
2819
2820 b->ptr = b->end = b->buf;
2821 if (PerlIO_fast_gets(n)) {
2822 /*
2823 * Layer below is also buffered We do _NOT_ want to call its
2824 * ->Read() because that will loop till it gets what we asked for
2825 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2826 * hand, or ask it to fill _once_.
14a5cf38
JH		 2827 */
2828 avail = PerlIO_get_cnt(n);
2829 if (avail <= 0) {
2830 avail = PerlIO_fill(n);
2831 if (avail == 0)
2832 avail = PerlIO_get_cnt(n);
2833 else {
2834 if (!PerlIO_error(n) && PerlIO_eof(n))
2835 avail = 0;
2836 }
2837 }
2838 if (avail > 0) {
2839 STDCHAR *ptr = PerlIO_get_ptr(n);
2840 SSize_t cnt = avail;
2841 if (avail > b->bufsiz)
2842 avail = b->bufsiz;
2843 Copy(ptr, b->buf, avail, STDCHAR);
2844 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
2845 }
2846 }
2847 else {
2848 avail = PerlIO_read(n, b->ptr, b->bufsiz);
2849 }
2850 if (avail <= 0) {
2851 if (avail == 0)
2852 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2853 else
2854 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2855 return -1;
2856 }
2857 b->end = b->buf + avail;
2858 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2859 return 0;
06da4f11
NIS		 2860}
2861
6f9d8c32 2862SSize_t
9e353e3b 2863PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 2864{
14a5cf38
JH		 2865 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2866 if (f) {
2867 if (!b->ptr)
2868 PerlIO_get_base(f);
2869 return PerlIOBase_read(f, vbuf, count);
2870 }
2871 return 0;
6f9d8c32
NIS		 2872}
2873
9e353e3b
NIS		 2874SSize_t
2875PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2876{
14a5cf38
JH		 2877 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
2878 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2879 SSize_t unread = 0;
2880 SSize_t avail;
2881 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
2882 PerlIO_flush(f);
2883 if (!b->buf)
2884 PerlIO_get_base(f);
2885 if (b->buf) {
2886 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2887 /*
2888 * Buffer is already a read buffer, we can overwrite any chars
71200d45 2889 * which have been read back to buffer start
14a5cf38
JH		 2890 */
2891 avail = (b->ptr - b->buf);
2892 }
2893 else {
2894 /*
2895 * Buffer is idle, set it up so whole buffer is available for
71200d45 2896 * unread
14a5cf38
JH		 2897 */
2898 avail = b->bufsiz;
2899 b->end = b->buf + avail;
2900 b->ptr = b->end;
2901 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
2902 /*
71200d45 2903 * Buffer extends _back_ from where we are now
14a5cf38
JH		 2904 */
2905 b->posn -= b->bufsiz;
2906 }
2907 if (avail > (SSize_t) count) {
2908 /*
71200d45 2909 * If we have space for more than count, just move count
14a5cf38
JH		 2910 */
2911 avail = count;
2912 }
2913 if (avail > 0) {
2914 b->ptr -= avail;
2915 buf -= avail;
2916 /*
2917 * In simple stdio-like ungetc() case chars will be already
71200d45 2918 * there
14a5cf38
JH		 2919 */
2920 if (buf != b->ptr) {
2921 Copy(buf, b->ptr, avail, STDCHAR);
2922 }
2923 count -= avail;
2924 unread += avail;
2925 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2926 }
2927 }
2928 return unread;
760ac839
LW		 2929}
2930
9e353e3b
NIS		 2931SSize_t
2932PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 2933{
14a5cf38
JH		 2934 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2935 const STDCHAR *buf = (const STDCHAR *) vbuf;
2936 Size_t written = 0;
2937 if (!b->buf)
2938 PerlIO_get_base(f);
2939 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
2940 return 0;
2941 while (count > 0) {
2942 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
2943 if ((SSize_t) count < avail)
2944 avail = count;
2945 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
2946 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
2947 while (avail > 0) {
2948 int ch = *buf++;
2949 *(b->ptr)++ = ch;
2950 count--;
2951 avail--;
2952 written++;
2953 if (ch == '\n') {
2954 PerlIO_flush(f);
2955 break;
2956 }
2957 }
2958 }
2959 else {
2960 if (avail) {
2961 Copy(buf, b->ptr, avail, STDCHAR);
2962 count -= avail;
2963 buf += avail;
2964 written += avail;
2965 b->ptr += avail;
2966 }
2967 }
2968 if (b->ptr >= (b->buf + b->bufsiz))
2969 PerlIO_flush(f);
2970 }
2971 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
2972 PerlIO_flush(f);
2973 return written;
9e353e3b
NIS		 2974}
2975
2976IV
2977PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
2978{
14a5cf38
JH		 2979 IV code;
2980 if ((code = PerlIO_flush(f)) == 0) {
2981 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2982 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2983 code = PerlIO_seek(PerlIONext(f), offset, whence);
2984 if (code == 0) {
2985 b->posn = PerlIO_tell(PerlIONext(f));
2986 }
9e353e3b 2987 }
14a5cf38 2988 return code;
9e353e3b
NIS		 2989}
2990
2991Off_t
2992PerlIOBuf_tell(PerlIO *f)
2993{
14a5cf38
JH		 2994 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2995 /*
71200d45 2996 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 2997 */
2998 Off_t posn = b->posn;
2999 if (b->buf) {
3000 /*
71200d45 3001 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3002 */
3003 posn += (b->ptr - b->buf);
3004 }
3005 return posn;
9e353e3b
NIS		 3006}
3007
3008IV
3009PerlIOBuf_close(PerlIO *f)
3010{
14a5cf38
JH		 3011 IV code = PerlIOBase_close(f);
3012 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3013 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3014 PerlMemShared_free(b->buf);
3015 }
3016 b->buf = NULL;
3017 b->ptr = b->end = b->buf;
3018 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3019 return code;
760ac839
LW		 3020}
3021
9e353e3b
NIS		 3022STDCHAR *
3023PerlIOBuf_get_ptr(PerlIO *f)
3024{
14a5cf38
JH		 3025 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3026 if (!b->buf)
3027 PerlIO_get_base(f);
3028 return b->ptr;
9e353e3b
NIS		 3029}
3030
05d1247b 3031SSize_t
9e353e3b
NIS		 3032PerlIOBuf_get_cnt(PerlIO *f)
3033{
14a5cf38
JH		 3034 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3035 if (!b->buf)
3036 PerlIO_get_base(f);
3037 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3038 return (b->end - b->ptr);
3039 return 0;
9e353e3b
NIS		 3040}
3041
3042STDCHAR *
3043PerlIOBuf_get_base(PerlIO *f)
3044{
14a5cf38
JH		 3045 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3046 if (!b->buf) {
3047 if (!b->bufsiz)
3048 b->bufsiz = 4096;
3049 b->buf = PerlMemShared_calloc(b->bufsiz, sizeof(STDCHAR));
3050 if (!b->buf) {
3051 b->buf = (STDCHAR *) & b->oneword;
3052 b->bufsiz = sizeof(b->oneword);
3053 }
3054 b->ptr = b->buf;
3055 b->end = b->ptr;
06da4f11 3056 }
14a5cf38 3057 return b->buf;
9e353e3b
NIS		 3058}
3059
3060Size_t
3061PerlIOBuf_bufsiz(PerlIO *f)
3062{
14a5cf38
JH		 3063 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3064 if (!b->buf)
3065 PerlIO_get_base(f);
3066 return (b->end - b->buf);
9e353e3b
NIS		 3067}
3068
3069void
14a5cf38 3070PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3071{
14a5cf38
JH		 3072 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3073 if (!b->buf)
3074 PerlIO_get_base(f);
3075 b->ptr = ptr;
3076 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3077 dTHX;
3078 assert(PerlIO_get_cnt(f) == cnt);
3079 assert(b->ptr >= b->buf);
3080 }
3081 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3082}
3083
71200d45 3084PerlIO *
8cf8f3d1 3085PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3086{
a8fc9800 3087 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3088}
3089
3090
3091
9e353e3b 3092PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3093 "perlio",
3094 sizeof(PerlIOBuf),
3095 PERLIO_K_BUFFERED,
3096 PerlIOBuf_pushed,
3097 PerlIOBase_noop_ok,
3098 PerlIOBuf_open,
3099 NULL,
3100 PerlIOBase_fileno,
71200d45 3101 PerlIOBuf_dup,
14a5cf38
JH		 3102 PerlIOBuf_read,
3103 PerlIOBuf_unread,
3104 PerlIOBuf_write,
3105 PerlIOBuf_seek,
3106 PerlIOBuf_tell,
3107 PerlIOBuf_close,
3108 PerlIOBuf_flush,
3109 PerlIOBuf_fill,
3110 PerlIOBase_eof,
3111 PerlIOBase_error,
3112 PerlIOBase_clearerr,
3113 PerlIOBase_setlinebuf,
3114 PerlIOBuf_get_base,
3115 PerlIOBuf_bufsiz,
3116 PerlIOBuf_get_ptr,
3117 PerlIOBuf_get_cnt,
3118 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3119};
3120
66ecd56b 3121/*--------------------------------------------------------------------------------------*/
14a5cf38 3122/*
71200d45 3123 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3124 */
5e2ab84b
NIS		 3125
3126IV
3127PerlIOPending_fill(PerlIO *f)
3128{
14a5cf38 3129 /*
71200d45 3130 * Should never happen
14a5cf38
JH		 3131 */
3132 PerlIO_flush(f);
3133 return 0;
5e2ab84b
NIS		 3134}
3135
3136IV
3137PerlIOPending_close(PerlIO *f)
3138{
14a5cf38 3139 /*
71200d45 3140 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3141 */
3142 PerlIO_flush(f);
3143 return PerlIO_close(f);
5e2ab84b
NIS		 3144}
3145
3146IV
3147PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3148{
14a5cf38 3149 /*
71200d45 3150 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3151 */
3152 PerlIO_flush(f);
3153 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3154}
3155
3156
3157IV
3158PerlIOPending_flush(PerlIO *f)
3159{
14a5cf38
JH		 3160 dTHX;
3161 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3162 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3163 PerlMemShared_free(b->buf);
3164 b->buf = NULL;
3165 }
3166 PerlIO_pop(aTHX_ f);
3167 return 0;
5e2ab84b
NIS		 3168}
3169
3170void
14a5cf38 3171PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3172{
14a5cf38
JH		 3173 if (cnt <= 0) {
3174 PerlIO_flush(f);
3175 }
3176 else {
3177 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3178 }
5e2ab84b
NIS		 3179}
3180
3181IV
14a5cf38 3182PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3183{
14a5cf38
JH		 3184 IV code = PerlIOBase_pushed(f, mode, arg);
3185 PerlIOl *l = PerlIOBase(f);
3186 /*
71200d45
NIS		 3187 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3188 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3189 */
3190 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3191 (PerlIOBase(PerlIONext(f))->
3192 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3193 return code;
5e2ab84b
NIS		 3194}
3195
3196SSize_t
3197PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3198{
14a5cf38
JH		 3199 SSize_t avail = PerlIO_get_cnt(f);
3200 SSize_t got = 0;
3201 if (count < avail)
3202 avail = count;
3203 if (avail > 0)
3204 got = PerlIOBuf_read(f, vbuf, avail);
3205 if (got >= 0 && got < count) {
3206 SSize_t more =
3207 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3208 if (more >= 0 || got == 0)
3209 got += more;
3210 }
3211 return got;
5e2ab84b
NIS		 3212}
3213
5e2ab84b 3214PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3215 "pending",
3216 sizeof(PerlIOBuf),
3217 PERLIO_K_BUFFERED,
3218 PerlIOPending_pushed,
3219 PerlIOBase_noop_ok,
3220 NULL,
3221 NULL,
3222 PerlIOBase_fileno,
71200d45 3223 PerlIOBuf_dup,
14a5cf38
JH		 3224 PerlIOPending_read,
3225 PerlIOBuf_unread,
3226 PerlIOBuf_write,
3227 PerlIOPending_seek,
3228 PerlIOBuf_tell,
3229 PerlIOPending_close,
3230 PerlIOPending_flush,
3231 PerlIOPending_fill,
3232 PerlIOBase_eof,
3233 PerlIOBase_error,
3234 PerlIOBase_clearerr,
3235 PerlIOBase_setlinebuf,
3236 PerlIOBuf_get_base,
3237 PerlIOBuf_bufsiz,
3238 PerlIOBuf_get_ptr,
3239 PerlIOBuf_get_cnt,
3240 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3241};
3242
3243
3244
3245/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3246/*
3247 * crlf - translation On read translate CR,LF to "\n" we do this by
3248 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3249 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3250 */
3251
14a5cf38
JH		 3252typedef struct {
3253 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3254 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3255 * buffer */
99efab12
NIS		 3256} PerlIOCrlf;
3257
f5b9d040 3258IV
14a5cf38 3259PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3260{
14a5cf38
JH		 3261 IV code;
3262 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3263 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3264#if 0
14a5cf38
JH		 3265 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3266 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3267 PerlIOBase(f)->flags);
5e2ab84b 3268#endif
14a5cf38 3269 return code;
f5b9d040
NIS		 3270}
3271
3272
99efab12
NIS		 3273SSize_t
3274PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3275{
14a5cf38
JH		 3276 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3277 if (c->nl) {
3278 *(c->nl) = 0xd;
3279 c->nl = NULL;
3280 }
3281 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3282 return PerlIOBuf_unread(f, vbuf, count);
3283 else {
3284 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3285 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3286 SSize_t unread = 0;
3287 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3288 PerlIO_flush(f);
3289 if (!b->buf)
3290 PerlIO_get_base(f);
3291 if (b->buf) {
3292 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3293 b->end = b->ptr = b->buf + b->bufsiz;
3294 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3295 b->posn -= b->bufsiz;
3296 }
3297 while (count > 0 && b->ptr > b->buf) {
3298 int ch = *--buf;
3299 if (ch == '\n') {
3300 if (b->ptr - 2 >= b->buf) {
3301 *--(b->ptr) = 0xa;
3302 *--(b->ptr) = 0xd;
3303 unread++;
3304 count--;
3305 }
3306 else {
3307 buf++;
3308 break;
3309 }
3310 }
3311 else {
3312 *--(b->ptr) = ch;
3313 unread++;
3314 count--;
3315 }
3316 }
3317 }
3318 return unread;
3319 }
99efab12
NIS		 3320}
3321
3322SSize_t
3323PerlIOCrlf_get_cnt(PerlIO *f)
3324{
14a5cf38
JH		 3325 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3326 if (!b->buf)
3327 PerlIO_get_base(f);
3328 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3329 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3330 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3331 STDCHAR *nl = b->ptr;
3332 scan:
3333 while (nl < b->end && *nl != 0xd)
3334 nl++;
3335 if (nl < b->end && *nl == 0xd) {
3336 test:
3337 if (nl + 1 < b->end) {
3338 if (nl[1] == 0xa) {
3339 *nl = '\n';
3340 c->nl = nl;
3341 }
3342 else {
3343 /*
71200d45 3344 * Not CR,LF but just CR
14a5cf38
JH		 3345 */
3346 nl++;
3347 goto scan;
3348 }
3349 }
3350 else {
3351 /*
71200d45 3352 * Blast - found CR as last char in buffer
14a5cf38
JH		 3353 */
3354 if (b->ptr < nl) {
3355 /*
3356 * They may not care, defer work as long as
71200d45 3357 * possible
14a5cf38
JH		 3358 */
3359 return (nl - b->ptr);
3360 }
3361 else {
3362 int code;
3363 b->ptr++; /* say we have read it as far as
3364 * flush() is concerned */
3365 b->buf++; /* Leave space an front of buffer */
3366 b->bufsiz--; /* Buffer is thus smaller */
3367 code = PerlIO_fill(f); /* Fetch some more */
3368 b->bufsiz++; /* Restore size for next time */
3369 b->buf--; /* Point at space */
3370 b->ptr = nl = b->buf; /* Which is what we hand
3371 * off */
3372 b->posn--; /* Buffer starts here */
3373 *nl = 0xd; /* Fill in the CR */
3374 if (code == 0)
3375 goto test; /* fill() call worked */
3376 /*
71200d45 3377 * CR at EOF - just fall through
14a5cf38
JH		 3378 */
3379 }
3380 }
3381 }
3382 }
3383 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3384 }
3385 return 0;
99efab12
NIS		 3386}
3387
3388void
14a5cf38
JH		 3389PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3390{
3391 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3392 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3393 IV flags = PerlIOBase(f)->flags;
3394 if (!b->buf)
3395 PerlIO_get_base(f);
3396 if (!ptr) {
3397 if (c->nl)
3398 ptr = c->nl + 1;
3399 else {
3400 ptr = b->end;
3401 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3402 ptr--;
3403 }
3404 ptr -= cnt;
3405 }
3406 else {
3407 /*
71200d45 3408 * Test code - delete when it works ...
14a5cf38
JH		 3409 */
3410 STDCHAR *chk;
3411 if (c->nl)
3412 chk = c->nl + 1;
3413 else {
3414 chk = b->end;
3415 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3416 chk--;
3417 }
3418 chk -= cnt;
3419
3420 if (ptr != chk) {
3421 dTHX;
3422 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3423 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3424 b->end, cnt);
3425 }
3426 }
3427 if (c->nl) {
3428 if (ptr > c->nl) {
3429 /*
71200d45 3430 * They have taken what we lied about
14a5cf38
JH		 3431 */
3432 *(c->nl) = 0xd;
3433 c->nl = NULL;
3434 ptr++;
3435 }
3436 }
3437 b->ptr = ptr;
3438 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3439}
3440
3441SSize_t
3442PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3443{
14a5cf38
JH		 3444 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3445 return PerlIOBuf_write(f, vbuf, count);
3446 else {
3447 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3448 const STDCHAR *buf = (const STDCHAR *) vbuf;
3449 const STDCHAR *ebuf = buf + count;
3450 if (!b->buf)
3451 PerlIO_get_base(f);
3452 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3453 return 0;
3454 while (buf < ebuf) {
3455 STDCHAR *eptr = b->buf + b->bufsiz;
3456 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3457 while (buf < ebuf && b->ptr < eptr) {
3458 if (*buf == '\n') {
3459 if ((b->ptr + 2) > eptr) {
3460 /*
71200d45 3461 * Not room for both
14a5cf38
JH		 3462 */
3463 PerlIO_flush(f);
3464 break;
3465 }
3466 else {
3467 *(b->ptr)++ = 0xd; /* CR */
3468 *(b->ptr)++ = 0xa; /* LF */
3469 buf++;
3470 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3471 PerlIO_flush(f);
3472 break;
3473 }
3474 }
3475 }
3476 else {
3477 int ch = *buf++;
3478 *(b->ptr)++ = ch;
3479 }
3480 if (b->ptr >= eptr) {
3481 PerlIO_flush(f);
3482 break;
3483 }
3484 }
3485 }
3486 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3487 PerlIO_flush(f);
3488 return (buf - (STDCHAR *) vbuf);
3489 }
99efab12
NIS		 3490}
3491
3492IV
3493PerlIOCrlf_flush(PerlIO *f)
3494{
14a5cf38
JH		 3495 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3496 if (c->nl) {
3497 *(c->nl) = 0xd;
3498 c->nl = NULL;
3499 }
3500 return PerlIOBuf_flush(f);
99efab12
NIS		 3501}
3502
66ecd56b 3503PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3504 "crlf",
3505 sizeof(PerlIOCrlf),
3506 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3507 PerlIOCrlf_pushed,
3508 PerlIOBase_noop_ok, /* popped */
3509 PerlIOBuf_open,
3510 NULL,
3511 PerlIOBase_fileno,
71200d45 3512 PerlIOBuf_dup,
14a5cf38
JH		 3513 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3514 * ... */
3515 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3516 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3517 PerlIOBuf_seek,
3518 PerlIOBuf_tell,
3519 PerlIOBuf_close,
3520 PerlIOCrlf_flush,
3521 PerlIOBuf_fill,
3522 PerlIOBase_eof,
3523 PerlIOBase_error,
3524 PerlIOBase_clearerr,
3525 PerlIOBase_setlinebuf,
3526 PerlIOBuf_get_base,
3527 PerlIOBuf_bufsiz,
3528 PerlIOBuf_get_ptr,
3529 PerlIOCrlf_get_cnt,
3530 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3531};
3532
06da4f11
NIS		 3533#ifdef HAS_MMAP
3534/*--------------------------------------------------------------------------------------*/
14a5cf38 3535/*
71200d45 3536 * mmap as "buffer" layer
14a5cf38 3537 */
06da4f11 3538
14a5cf38
JH		 3539typedef struct {
3540 PerlIOBuf base; /* PerlIOBuf stuff */
3541 Mmap_t mptr; /* Mapped address */
3542 Size_t len; /* mapped length */
3543 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3544} PerlIOMmap;
3545
c3d7c7c9
NIS		 3546static size_t page_size = 0;
3547
06da4f11
NIS		 3548IV
3549PerlIOMmap_map(PerlIO *f)
3550{
14a5cf38
JH		 3551 dTHX;
3552 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3553 IV flags = PerlIOBase(f)->flags;
3554 IV code = 0;
3555 if (m->len)
3556 abort();
3557 if (flags & PERLIO_F_CANREAD) {
3558 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3559 int fd = PerlIO_fileno(f);
3560 struct stat st;
3561 code = fstat(fd, &st);
3562 if (code == 0 && S_ISREG(st.st_mode)) {
3563 SSize_t len = st.st_size - b->posn;
3564 if (len > 0) {
3565 Off_t posn;
3566 if (!page_size) {
68d873c6 3567#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3568 {
3569 SETERRNO(0, SS$_NORMAL);
68d873c6 3570# ifdef _SC_PAGESIZE
14a5cf38 3571 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3572# else
14a5cf38 3573 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3574# endif
14a5cf38
JH		 3575 if ((long) page_size < 0) {
3576 if (errno) {
3577 SV *error = ERRSV;
3578 char *msg;
3579 STRLEN n_a;
3580 (void) SvUPGRADE(error, SVt_PV);
3581 msg = SvPVx(error, n_a);
3582 Perl_croak(aTHX_ "panic: sysconf: %s",
3583 msg);
3584 }
3585 else
3586 Perl_croak(aTHX_
3587 "panic: sysconf: pagesize unknown");
3588 }
3589 }
68d873c6
JH		 3590#else
3591# ifdef HAS_GETPAGESIZE
14a5cf38 3592 page_size = getpagesize();
68d873c6
JH		 3593# else
3594# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3595 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3596# endif
3597# endif
3598#endif
14a5cf38
JH		 3599 if ((IV) page_size <= 0)
3600 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3601 (IV) page_size);
3602 }
3603 if (b->posn < 0) {
3604 /*
3605 * This is a hack - should never happen - open should
71200d45 3606 * have set it !
14a5cf38
JH		 3607 */
3608 b->posn = PerlIO_tell(PerlIONext(f));
3609 }
3610 posn = (b->posn / page_size) * page_size;
3611 len = st.st_size - posn;
3612 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3613 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3614#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3615 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3616#endif
a5262162 3617#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3618 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3619#endif
14a5cf38
JH		 3620 PerlIOBase(f)->flags =
3621 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3622 b->end = ((STDCHAR *) m->mptr) + len;
3623 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3624 b->ptr = b->buf;
3625 m->len = len;
3626 }
3627 else {
3628 b->buf = NULL;
3629 }
3630 }
3631 else {
3632 PerlIOBase(f)->flags =
3633 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3634 b->buf = NULL;
3635 b->ptr = b->end = b->ptr;
3636 code = -1;
3637 }
3638 }
3639 }
3640 return code;
06da4f11
NIS		 3641}
3642
3643IV
3644PerlIOMmap_unmap(PerlIO *f)
3645{
14a5cf38
JH		 3646 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3647 PerlIOBuf *b = &m->base;
3648 IV code = 0;
3649 if (m->len) {
3650 if (b->buf) {
3651 code = munmap(m->mptr, m->len);
3652 b->buf = NULL;
3653 m->len = 0;
3654 m->mptr = NULL;
3655 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3656 code = -1;
3657 }
3658 b->ptr = b->end = b->buf;
3659 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3660 }
3661 return code;
06da4f11
NIS		 3662}
3663
3664STDCHAR *
3665PerlIOMmap_get_base(PerlIO *f)
3666{
14a5cf38
JH		 3667 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3668 PerlIOBuf *b = &m->base;
3669 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3670 /*
71200d45 3671 * Already have a readbuffer in progress
14a5cf38
JH		 3672 */
3673 return b->buf;
3674 }
3675 if (b->buf) {
3676 /*
71200d45 3677 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3678 */
3679 m->bbuf = b->buf; /* save it in case we need it again */
3680 b->buf = NULL; /* Clear to trigger below */
3681 }
3682 if (!b->buf) {
3683 PerlIOMmap_map(f); /* Try and map it */
3684 if (!b->buf) {
3685 /*
71200d45 3686 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3687 */
3688 b->buf = m->bbuf;
3689 }
3690 }
3691 b->ptr = b->end = b->buf;
3692 if (b->buf)
3693 return b->buf;
3694 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3695}
3696
3697SSize_t
3698PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3699{
14a5cf38
JH		 3700 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3701 PerlIOBuf *b = &m->base;
3702 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3703 PerlIO_flush(f);
3704 if (b->ptr && (b->ptr - count) >= b->buf
3705 && memEQ(b->ptr - count, vbuf, count)) {
3706 b->ptr -= count;
3707 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3708 return count;
3709 }
3710 if (m->len) {
3711 /*
71200d45 3712 * Loose the unwritable mapped buffer
14a5cf38
JH		 3713 */
3714 PerlIO_flush(f);
3715 /*
71200d45 3716 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3717 */
3718 if (!b->buf && m->bbuf)
3719 b->buf = m->bbuf;
3720 if (!b->buf) {
3721 PerlIOBuf_get_base(f);
3722 m->bbuf = b->buf;
3723 }
3724 }
3725 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3726}
3727
3728SSize_t
3729PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3730{
14a5cf38
JH		 3731 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3732 PerlIOBuf *b = &m->base;
3733 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3734 /*
71200d45 3735 * No, or wrong sort of, buffer
14a5cf38
JH		 3736 */
3737 if (m->len) {
3738 if (PerlIOMmap_unmap(f) != 0)
3739 return 0;
3740 }
3741 /*
71200d45 3742 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3743 */
3744 if (!b->buf && m->bbuf)
3745 b->buf = m->bbuf;
3746 if (!b->buf) {
3747 PerlIOBuf_get_base(f);
3748 m->bbuf = b->buf;
3749 }
06da4f11 3750 }
14a5cf38 3751 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3752}
3753
3754IV
3755PerlIOMmap_flush(PerlIO *f)
3756{
14a5cf38
JH		 3757 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3758 PerlIOBuf *b = &m->base;
3759 IV code = PerlIOBuf_flush(f);
3760 /*
71200d45 3761 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3762 */
3763 if (b->buf) {
3764 if (m->len) {
3765 /*
71200d45 3766 * Unmap the buffer
14a5cf38
JH		 3767 */
3768 if (PerlIOMmap_unmap(f) != 0)
3769 code = -1;
3770 }
3771 else {
3772 /*
3773 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3774 * remember it in case we need one later
14a5cf38
JH		 3775 */
3776 m->bbuf = b->buf;
3777 }
3778 }
3779 return code;
06da4f11
NIS		 3780}
3781
3782IV
3783PerlIOMmap_fill(PerlIO *f)
3784{
14a5cf38
JH		 3785 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3786 IV code = PerlIO_flush(f);
3787 if (code == 0 && !b->buf) {
3788 code = PerlIOMmap_map(f);
3789 }
3790 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3791 code = PerlIOBuf_fill(f);
3792 }
3793 return code;
06da4f11
NIS		 3794}
3795
3796IV
3797PerlIOMmap_close(PerlIO *f)
3798{
14a5cf38
JH		 3799 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3800 PerlIOBuf *b = &m->base;
3801 IV code = PerlIO_flush(f);
3802 if (m->bbuf) {
3803 b->buf = m->bbuf;
3804 m->bbuf = NULL;
3805 b->ptr = b->end = b->buf;
3806 }
3807 if (PerlIOBuf_close(f) != 0)
3808 code = -1;
3809 return code;
06da4f11
NIS		 3810}
3811
71200d45 3812PerlIO *
8cf8f3d1 3813PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3814{
a8fc9800 3815 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3816}
3817
06da4f11
NIS		 3818
3819PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3820 "mmap",
3821 sizeof(PerlIOMmap),
3822 PERLIO_K_BUFFERED,
3823 PerlIOBuf_pushed,
3824 PerlIOBase_noop_ok,
3825 PerlIOBuf_open,
3826 NULL,
3827 PerlIOBase_fileno,
71200d45 3828 PerlIOMmap_dup,
14a5cf38
JH		 3829 PerlIOBuf_read,
3830 PerlIOMmap_unread,
3831 PerlIOMmap_write,
3832 PerlIOBuf_seek,
3833 PerlIOBuf_tell,
3834 PerlIOBuf_close,
3835 PerlIOMmap_flush,
3836 PerlIOMmap_fill,
3837 PerlIOBase_eof,
3838 PerlIOBase_error,
3839 PerlIOBase_clearerr,
3840 PerlIOBase_setlinebuf,
3841 PerlIOMmap_get_base,
3842 PerlIOBuf_bufsiz,
3843 PerlIOBuf_get_ptr,
3844 PerlIOBuf_get_cnt,
3845 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 3846};
3847
14a5cf38 3848#endif /* HAS_MMAP */
06da4f11 3849
9e353e3b
NIS		 3850void
3851PerlIO_init(void)
760ac839 3852{
14a5cf38 3853 dTHX;
43c11ae3 3854#ifndef WIN32
14a5cf38 3855 call_atexit(PerlIO_cleanup_layers, NULL);
43c11ae3 3856#endif
14a5cf38 3857 if (!_perlio) {
be696b0a 3858#ifndef WIN32
14a5cf38 3859 atexit(&PerlIO_cleanup);
be696b0a 3860#endif
14a5cf38 3861 }
760ac839
LW		 3862}
3863
9e353e3b
NIS		 3864#undef PerlIO_stdin
3865PerlIO *
3866PerlIO_stdin(void)
3867{
14a5cf38
JH		 3868 if (!_perlio) {
3869 dTHX;
3870 PerlIO_stdstreams(aTHX);
3871 }
3872 return &_perlio[1];
9e353e3b
NIS		 3873}
3874
3875#undef PerlIO_stdout
3876PerlIO *
3877PerlIO_stdout(void)
3878{
14a5cf38
JH		 3879 if (!_perlio) {
3880 dTHX;
3881 PerlIO_stdstreams(aTHX);
3882 }
3883 return &_perlio[2];
9e353e3b
NIS		 3884}
3885
3886#undef PerlIO_stderr
3887PerlIO *
3888PerlIO_stderr(void)
3889{
14a5cf38
JH		 3890 if (!_perlio) {
3891 dTHX;
3892 PerlIO_stdstreams(aTHX);
3893 }
3894 return &_perlio[3];
9e353e3b
NIS		 3895}
3896
3897/*--------------------------------------------------------------------------------------*/
3898
3899#undef PerlIO_getname
3900char *
3901PerlIO_getname(PerlIO *f, char *buf)
3902{
14a5cf38
JH		 3903 dTHX;
3904 char *name = NULL;
a15cef0c 3905#ifdef VMS
14a5cf38
JH		 3906 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3907 if (stdio)
3908 name = fgetname(stdio, buf);
a15cef0c 3909#else
14a5cf38 3910 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 3911#endif
14a5cf38 3912 return name;
9e353e3b
NIS		 3913}
3914
3915
3916/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3917/*
3918 * Functions which can be called on any kind of PerlIO implemented in
71200d45 3919 * terms of above
14a5cf38 3920 */
9e353e3b
NIS		 3921
3922#undef PerlIO_getc
6f9d8c32 3923int
9e353e3b 3924PerlIO_getc(PerlIO *f)
760ac839 3925{
14a5cf38
JH		 3926 STDCHAR buf[1];
3927 SSize_t count = PerlIO_read(f, buf, 1);
3928 if (count == 1) {
3929 return (unsigned char) buf[0];
3930 }
3931 return EOF;
313ca112
NIS		 3932}
3933
3934#undef PerlIO_ungetc
3935int
3936PerlIO_ungetc(PerlIO *f, int ch)
3937{
14a5cf38
JH		 3938 if (ch != EOF) {
3939 STDCHAR buf = ch;
3940 if (PerlIO_unread(f, &buf, 1) == 1)
3941 return ch;
3942 }
3943 return EOF;
760ac839
LW		 3944}
3945
9e353e3b
NIS		 3946#undef PerlIO_putc
3947int
3948PerlIO_putc(PerlIO *f, int ch)
760ac839 3949{
14a5cf38
JH		 3950 STDCHAR buf = ch;
3951 return PerlIO_write(f, &buf, 1);
760ac839
LW		 3952}
3953
9e353e3b 3954#undef PerlIO_puts
760ac839 3955int
9e353e3b 3956PerlIO_puts(PerlIO *f, const char *s)
760ac839 3957{
14a5cf38
JH		 3958 STRLEN len = strlen(s);
3959 return PerlIO_write(f, s, len);
760ac839
LW		 3960}
3961
3962#undef PerlIO_rewind
3963void
c78749f2 3964PerlIO_rewind(PerlIO *f)
760ac839 3965{
14a5cf38
JH		 3966 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
3967 PerlIO_clearerr(f);
6f9d8c32
NIS		 3968}
3969
3970#undef PerlIO_vprintf
3971int
3972PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
3973{
14a5cf38
JH		 3974 dTHX;
3975 SV *sv = newSVpvn("", 0);
3976 char *s;
3977 STRLEN len;
3978 SSize_t wrote;
2cc61e15 3979#ifdef NEED_VA_COPY
14a5cf38
JH		 3980 va_list apc;
3981 Perl_va_copy(ap, apc);
3982 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 3983#else
14a5cf38 3984 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 3985#endif
14a5cf38
JH		 3986 s = SvPV(sv, len);
3987 wrote = PerlIO_write(f, s, len);
3988 SvREFCNT_dec(sv);
3989 return wrote;
760ac839
LW		 3990}
3991
3992#undef PerlIO_printf
6f9d8c32 3993int
14a5cf38 3994PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 3995{
14a5cf38
JH		 3996 va_list ap;
3997 int result;
3998 va_start(ap, fmt);
3999 result = PerlIO_vprintf(f, fmt, ap);
4000 va_end(ap);
4001 return result;
760ac839
LW		 4002}
4003
4004#undef PerlIO_stdoutf
6f9d8c32 4005int
14a5cf38 4006PerlIO_stdoutf(const char *fmt, ...)
760ac839 4007{
14a5cf38
JH		 4008 va_list ap;
4009 int result;
4010 va_start(ap, fmt);
4011 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4012 va_end(ap);
4013 return result;
760ac839
LW		 4014}
4015
4016#undef PerlIO_tmpfile
4017PerlIO *
c78749f2 4018PerlIO_tmpfile(void)
760ac839 4019{
14a5cf38 4020 /*
71200d45 4021 * I have no idea how portable mkstemp() is ...
14a5cf38 4022 */
83b075c3 4023#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 4024 dTHX;
4025 PerlIO *f = NULL;
4026 FILE *stdio = PerlSIO_tmpfile();
4027 if (stdio) {
4028 PerlIOStdio *s =
4029 PerlIOSelf(PerlIO_push
4030 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4031 "w+", Nullsv), PerlIOStdio);
4032 s->stdio = stdio;
4033 }
4034 return f;
83b075c3 4035#else
14a5cf38
JH		 4036 dTHX;
4037 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4038 int fd = mkstemp(SvPVX(sv));
4039 PerlIO *f = NULL;
4040 if (fd >= 0) {
4041 f = PerlIO_fdopen(fd, "w+");
4042 if (f) {
4043 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4044 }
4045 PerlLIO_unlink(SvPVX(sv));
4046 SvREFCNT_dec(sv);
4047 }
4048 return f;
83b075c3 4049#endif
760ac839
LW		 4050}
4051
6f9d8c32
NIS		 4052#undef HAS_FSETPOS
4053#undef HAS_FGETPOS
4054
14a5cf38
JH		 4055#endif /* USE_SFIO */
4056#endif /* PERLIO_IS_STDIO */
760ac839 4057
9e353e3b 4058/*======================================================================================*/
14a5cf38 4059/*
71200d45
NIS		 4060 * Now some functions in terms of above which may be needed even if we are
4061 * not in true PerlIO mode
9e353e3b
NIS		 4062 */
4063
760ac839
LW		 4064#ifndef HAS_FSETPOS
4065#undef PerlIO_setpos
4066int
766a733e 4067PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 4068{
14a5cf38
JH		 4069 dTHX;
4070 if (SvOK(pos)) {
4071 STRLEN len;
4072 Off_t *posn = (Off_t *) SvPV(pos, len);
4073 if (f && len == sizeof(Off_t))
4074 return PerlIO_seek(f, *posn, SEEK_SET);
4075 }
4076 SETERRNO(EINVAL, SS$_IVCHAN);
4077 return -1;
760ac839 4078}
c411622e 4079#else
c411622e 4080#undef PerlIO_setpos
4081int
766a733e 4082PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 4083{
14a5cf38
JH		 4084 dTHX;
4085 if (SvOK(pos)) {
4086 STRLEN len;
4087 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4088 if (f && len == sizeof(Fpos_t)) {
2d4389e4 4089#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4090 return fsetpos64(f, fpos);
d9b3e12d 4091#else
14a5cf38 4092 return fsetpos(f, fpos);
d9b3e12d 4093#endif
14a5cf38 4094 }
766a733e 4095 }
14a5cf38
JH		 4096 SETERRNO(EINVAL, SS$_IVCHAN);
4097 return -1;
c411622e 4098}
4099#endif
760ac839
LW		 4100
4101#ifndef HAS_FGETPOS
4102#undef PerlIO_getpos
4103int
766a733e 4104PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 4105{
14a5cf38
JH		 4106 dTHX;
4107 Off_t posn = PerlIO_tell(f);
4108 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4109 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 4110}
c411622e 4111#else
c411622e 4112#undef PerlIO_getpos
4113int
766a733e 4114PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 4115{
14a5cf38
JH		 4116 dTHX;
4117 Fpos_t fpos;
4118 int code;
2d4389e4 4119#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4120 code = fgetpos64(f, &fpos);
d9b3e12d 4121#else
14a5cf38 4122 code = fgetpos(f, &fpos);
d9b3e12d 4123#endif
14a5cf38
JH		 4124 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4125 return code;
c411622e 4126}
4127#endif
760ac839
LW		 4128
4129#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4130
4131int
c78749f2 4132vprintf(char *pat, char *args)
662a7e3f
CS		 4133{
4134 _doprnt(pat, args, stdout);
14a5cf38
JH		 4135 return 0; /* wrong, but perl doesn't use the return
4136 * value */
662a7e3f
CS		 4137}
4138
4139int
c78749f2 4140vfprintf(FILE *fd, char *pat, char *args)
760ac839
LW		 4141{
4142 _doprnt(pat, args, fd);
14a5cf38
JH		 4143 return 0; /* wrong, but perl doesn't use the return
4144 * value */
760ac839
LW		 4145}
4146
4147#endif
4148
4149#ifndef PerlIO_vsprintf
6f9d8c32 4150int
8ac85365 4151PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
760ac839 4152{
14a5cf38
JH		 4153 int val = vsprintf(s, fmt, ap);
4154 if (n >= 0) {
4155 if (strlen(s) >= (STRLEN) n) {
4156 dTHX;
4157 (void) PerlIO_puts(Perl_error_log,
4158 "panic: sprintf overflow - memory corrupted!\n");
4159 my_exit(1);
4160 }
760ac839 4161 }
14a5cf38 4162 return val;
760ac839
LW		 4163}
4164#endif
4165
4166#ifndef PerlIO_sprintf
6f9d8c32 4167int
14a5cf38 4168PerlIO_sprintf(char *s, int n, const char *fmt, ...)
760ac839 4169{
14a5cf38
JH		 4170 va_list ap;
4171 int result;
4172 va_start(ap, fmt);
4173 result = PerlIO_vsprintf(s, n, fmt, ap);
4174 va_end(ap);
4175 return result;
760ac839
LW		 4176}
4177#endif
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