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Re: [ID 20011114.118] chop and chomp bind too tightly
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
71200d45 2 * perlio.c Copyright (c) 1996-2001, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW		 5 */
6
14a5cf38 7/*
71200d45 8 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 9 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 10 * Invent a dSYS macro to abstract this out
14a5cf38 11 */
7bcba3d4
NIS		 12#ifdef PERL_IMPLICIT_SYS
13#define dSYS dTHX
14#else
15#define dSYS dNOOP
16#endif
17
760ac839 18#define VOIDUSED 1
12ae5dfc
JH		 19#ifdef PERL_MICRO
20# include "uconfig.h"
21#else
22# include "config.h"
23#endif
760ac839 24
6f9d8c32 25#define PERLIO_NOT_STDIO 0
760ac839 26#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 27/*
71200d45 28 * #define PerlIO FILE
14a5cf38 29 */
760ac839
LW		 30#endif
31/*
6f9d8c32 32 * This file provides those parts of PerlIO abstraction
88b61e10 33 * which are not #defined in perlio.h.
6f9d8c32 34 * Which these are depends on various Configure #ifdef's
760ac839
LW		 35 */
36
37#include "EXTERN.h"
864dbfa3 38#define PERL_IN_PERLIO_C
760ac839
LW		 39#include "perl.h"
40
32af7c23
CL		 41#ifdef PERL_IMPLICIT_CONTEXT
42#undef dSYS
43#define dSYS dTHX
44#endif
45
0c4f7ff0
NIS		 46#include "XSUB.h"
47
60382766 48int
f5b9d040 49perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 50{
14a5cf38 51 /*
71200d45 52 * This used to be contents of do_binmode in doio.c
14a5cf38 53 */
60382766
NIS		 54#ifdef DOSISH
55# if defined(atarist) || defined(__MINT__)
f5b9d040 56 if (!fflush(fp)) {
60382766 57 if (mode & O_BINARY)
14a5cf38 58 ((FILE *) fp)->_flag |= _IOBIN;
60382766 59 else
14a5cf38 60 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS		 61 return 1;
62 }
63 return 0;
64# else
eb73beca 65 dTHX;
14a5cf38
JH		 66#ifdef NETWARE
67 if (PerlLIO_setmode(fp, mode) != -1) {
68#else
f5b9d040 69 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 70#endif
60382766 71# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 72 /*
71200d45 73 * The translation mode of the stream is maintained independent of
14a5cf38 74 * the translation mode of the fd in the Borland RTL (heavy
71200d45 75 * digging through their runtime sources reveal). User has to set
14a5cf38 76 * the mode explicitly for the stream (though they don't document
71200d45 77 * this anywhere). GSAR 97-5-24
60382766 78 */
14a5cf38 79 fseek(fp, 0L, 0);
60382766 80 if (mode & O_BINARY)
f5b9d040 81 fp->flags |= _F_BIN;
60382766 82 else
14a5cf38 83 fp->flags &= ~_F_BIN;
60382766
NIS		 84# endif
85 return 1;
86 }
87 else
88 return 0;
89# endif
90#else
91# if defined(USEMYBINMODE)
92 if (my_binmode(fp, iotype, mode) != FALSE)
93 return 1;
94 else
95 return 0;
96# else
97 return 1;
98# endif
99#endif
100}
101
06c7082d
NIS		 102#ifndef O_ACCMODE
103#define O_ACCMODE 3 /* Assume traditional implementation */
104#endif
105
106int
107PerlIO_intmode2str(int rawmode, char *mode, int *writing)
108{
109 int result = rawmode & O_ACCMODE;
110 int ix = 0;
111 int ptype;
112 switch (result) {
113 case O_RDONLY:
114 ptype = IoTYPE_RDONLY;
115 break;
116 case O_WRONLY:
117 ptype = IoTYPE_WRONLY;
118 break;
119 case O_RDWR:
120 default:
121 ptype = IoTYPE_RDWR;
122 break;
123 }
124 if (writing)
125 *writing = (result != O_RDONLY);
126
127 if (result == O_RDONLY) {
128 mode[ix++] = 'r';
129 }
130#ifdef O_APPEND
131 else if (rawmode & O_APPEND) {
132 mode[ix++] = 'a';
133 if (result != O_WRONLY)
134 mode[ix++] = '+';
135 }
136#endif
137 else {
138 if (result == O_WRONLY)
139 mode[ix++] = 'w';
140 else {
141 mode[ix++] = 'r';
142 mode[ix++] = '+';
143 }
144 }
145 if (rawmode & O_BINARY)
146 mode[ix++] = 'b';
147 mode[ix] = '\0';
148 return ptype;
149}
150
eb73beca
NIS		 151#ifndef PERLIO_LAYERS
152int
153PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
154{
14a5cf38
JH		 155 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
156 return 0;
157 }
158 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
159 /*
71200d45 160 * NOTREACHED
14a5cf38
JH		 161 */
162 return -1;
eb73beca
NIS		 163}
164
13621cfb
NIS		 165void
166PerlIO_destruct(pTHX)
167{
168}
169
f5b9d040
NIS		 170int
171PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
172{
92bff44d 173#ifdef USE_SFIO
14a5cf38 174 return 1;
92bff44d 175#else
14a5cf38 176 return perlsio_binmode(fp, iotype, mode);
92bff44d 177#endif
f5b9d040 178}
60382766 179
e0fa5af2
NIS		 180PerlIO *
181PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
182{
7114a2d2 183#ifndef PERL_MICRO
e0fa5af2
NIS		 184 if (f) {
185 int fd = PerlLIO_dup(PerlIO_fileno(f));
186 if (fd >= 0) {
06c7082d
NIS		 187 char mode[8];
188 int omode = fcntl(fd, F_GETFL);
189 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 190 /* the r+ is a hack */
06c7082d 191 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS		 192 }
193 return NULL;
194 }
195 else {
196 SETERRNO(EBADF, SS$_IVCHAN);
197 }
7114a2d2 198#endif
e0fa5af2
NIS		 199 return NULL;
200}
201
202
14a5cf38 203/*
71200d45 204 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 205 */
ee518936
NIS		 206
207PerlIO *
14a5cf38
JH		 208PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
209 int imode, int perm, PerlIO *old, int narg, SV **args)
210{
211 if (narg == 1) {
212 if (*args == &PL_sv_undef)
213 return PerlIO_tmpfile();
214 else {
215 char *name = SvPV_nolen(*args);
216 if (*mode == '#') {
217 fd = PerlLIO_open3(name, imode, perm);
218 if (fd >= 0)
219 return PerlIO_fdopen(fd, (char *) mode + 1);
220 }
221 else if (old) {
222 return PerlIO_reopen(name, mode, old);
223 }
224 else {
225 return PerlIO_open(name, mode);
226 }
227 }
228 }
229 else {
230 return PerlIO_fdopen(fd, (char *) mode);
231 }
232 return NULL;
ee518936
NIS		 233}
234
0c4f7ff0
NIS		 235XS(XS_PerlIO__Layer__find)
236{
14a5cf38
JH		 237 dXSARGS;
238 if (items < 2)
239 Perl_croak(aTHX_ "Usage class->find(name[,load])");
240 else {
241 char *name = SvPV_nolen(ST(1));
242 ST(0) = (strEQ(name, "crlf")
243 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
244 XSRETURN(1);
245 }
0c4f7ff0
NIS		 246}
247
248
249void
250Perl_boot_core_PerlIO(pTHX)
251{
14a5cf38 252 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 253}
254
ac27b0f5
NIS		 255#endif
256
32e30700 257
6f9d8c32 258#ifdef PERLIO_IS_STDIO
760ac839
LW		 259
260void
e8632036 261PerlIO_init(pTHX)
760ac839 262{
14a5cf38
JH		 263 /*
264 * Does nothing (yet) except force this file to be included in perl
71200d45 265 * binary. That allows this file to force inclusion of other functions
14a5cf38 266 * that may be required by loadable extensions e.g. for
71200d45 267 * FileHandle::tmpfile
14a5cf38 268 */
760ac839
LW		 269}
270
33dcbb9a 271#undef PerlIO_tmpfile
272PerlIO *
8ac85365 273PerlIO_tmpfile(void)
33dcbb9a 274{
14a5cf38 275 return tmpfile();
33dcbb9a 276}
277
14a5cf38 278#else /* PERLIO_IS_STDIO */
760ac839
LW		 279
280#ifdef USE_SFIO
281
282#undef HAS_FSETPOS
283#undef HAS_FGETPOS
284
14a5cf38
JH		 285/*
286 * This section is just to make sure these functions get pulled in from
71200d45 287 * libsfio.a
14a5cf38 288 */
760ac839
LW		 289
290#undef PerlIO_tmpfile
291PerlIO *
c78749f2 292PerlIO_tmpfile(void)
760ac839 293{
14a5cf38 294 return sftmp(0);
760ac839
LW		 295}
296
297void
e8632036 298PerlIO_init(pTHX)
760ac839 299{
14a5cf38
JH		 300 /*
301 * Force this file to be included in perl binary. Which allows this
302 * file to force inclusion of other functions that may be required by
71200d45 303 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 304 */
760ac839 305
14a5cf38 306 /*
71200d45 307 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 308 * results in a lot of lseek()s to regular files and lot of small
71200d45 309 * writes to pipes.
14a5cf38
JH		 310 */
311 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW		 312}
313
92bff44d
NIS		 314PerlIO *
315PerlIO_importFILE(FILE *stdio, int fl)
316{
14a5cf38
JH		 317 int fd = fileno(stdio);
318 PerlIO *r = PerlIO_fdopen(fd, "r+");
319 return r;
92bff44d
NIS		 320}
321
322FILE *
323PerlIO_findFILE(PerlIO *pio)
324{
14a5cf38
JH		 325 int fd = PerlIO_fileno(pio);
326 FILE *f = fdopen(fd, "r+");
327 PerlIO_flush(pio);
328 if (!f && errno == EINVAL)
329 f = fdopen(fd, "w");
330 if (!f && errno == EINVAL)
331 f = fdopen(fd, "r");
332 return f;
92bff44d
NIS		 333}
334
335
14a5cf38 336#else /* USE_SFIO */
6f9d8c32 337/*======================================================================================*/
14a5cf38 338/*
71200d45 339 * Implement all the PerlIO interface ourselves.
9e353e3b 340 */
760ac839 341
76ced9ad
NIS		 342#include "perliol.h"
343
14a5cf38
JH		 344/*
345 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 346 * files
14a5cf38 347 */
02f66e2f
NIS		 348#ifdef I_UNISTD
349#include <unistd.h>
350#endif
06da4f11
NIS		 351#ifdef HAS_MMAP
352#include <sys/mman.h>
353#endif
354
02f66e2f 355
14a5cf38
JH		 356void PerlIO_debug(const char *fmt, ...)
357 __attribute__ ((format(__printf__, 1, 2)));
6f9d8c32 358
6f9d8c32 359void
14a5cf38
JH		 360PerlIO_debug(const char *fmt, ...)
361{
362 static int dbg = 0;
363 va_list ap;
364 dSYS;
365 va_start(ap, fmt);
366 if (!dbg) {
367 char *s = PerlEnv_getenv("PERLIO_DEBUG");
368 if (s && *s)
369 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
370 else
371 dbg = -1;
372 }
373 if (dbg > 0) {
374 dTHX;
70ace5da
NIS		 375#ifdef USE_ITHREADS
376 /* Use fixed buffer as sv_catpvf etc. needs SVs */
377 char buffer[1024];
378 char *s;
379 STRLEN len;
380 s = CopFILE(PL_curcop);
381 if (!s)
382 s = "(none)";
383 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
384 len = strlen(buffer);
385 vsprintf(buffer+len, fmt, ap);
386 PerlLIO_write(dbg, buffer, strlen(buffer));
387#else
14a5cf38
JH		 388 SV *sv = newSVpvn("", 0);
389 char *s;
390 STRLEN len;
391 s = CopFILE(PL_curcop);
392 if (!s)
393 s = "(none)";
394 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
395 (IV) CopLINE(PL_curcop));
396 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
397
398 s = SvPV(sv, len);
399 PerlLIO_write(dbg, s, len);
400 SvREFCNT_dec(sv);
70ace5da 401#endif
14a5cf38
JH		 402 }
403 va_end(ap);
6f9d8c32
NIS		 404}
405
9e353e3b
NIS		 406/*--------------------------------------------------------------------------------------*/
407
14a5cf38 408/*
71200d45 409 * Inner level routines
14a5cf38 410 */
9e353e3b 411
14a5cf38 412/*
71200d45 413 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 414 */
05d1247b 415#define PERLIO_TABLE_SIZE 64
6f9d8c32 416
760ac839 417PerlIO *
5f1a76d0 418PerlIO_allocate(pTHX)
6f9d8c32 419{
14a5cf38 420 /*
71200d45 421 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH		 422 */
423 PerlIO **last;
424 PerlIO *f;
a1ea730d 425 last = &PL_perlio;
14a5cf38
JH		 426 while ((f = *last)) {
427 int i;
428 last = (PerlIO **) (f);
429 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
430 if (!*++f) {
431 return f;
432 }
433 }
434 }
3a1ee7e8 435 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH		 436 if (!f) {
437 return NULL;
438 }
439 *last = f;
440 return f + 1;
05d1247b
NIS		 441}
442
a1ea730d
NIS		 443#undef PerlIO_fdupopen
444PerlIO *
445PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param)
446{
447 if (f && *f) {
448 PerlIO_funcs *tab = PerlIOBase(f)->tab;
449 PerlIO *new;
450 PerlIO_debug("fdupopen f=%p param=%p\n",f,param);
451 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param);
452 return new;
453 }
454 else {
455 SETERRNO(EBADF, SS$_IVCHAN);
456 return NULL;
457 }
458}
459
460void
5f1a76d0 461PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 462{
14a5cf38
JH		 463 PerlIO *table = *tablep;
464 if (table) {
465 int i;
466 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
467 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
468 PerlIO *f = table + i;
469 if (*f) {
470 PerlIO_close(f);
471 }
472 }
3a1ee7e8 473 Safefree(table);
14a5cf38 474 *tablep = NULL;
05d1247b 475 }
05d1247b
NIS		 476}
477
fcf2db38
NIS		 478
479PerlIO_list_t *
3a1ee7e8 480PerlIO_list_alloc(pTHX)
fcf2db38 481{
14a5cf38
JH		 482 PerlIO_list_t *list;
483 Newz('L', list, 1, PerlIO_list_t);
484 list->refcnt = 1;
485 return list;
fcf2db38
NIS		 486}
487
488void
3a1ee7e8 489PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 490{
14a5cf38
JH		 491 if (list) {
492 if (--list->refcnt == 0) {
493 if (list->array) {
14a5cf38
JH		 494 IV i;
495 for (i = 0; i < list->cur; i++) {
496 if (list->array[i].arg)
497 SvREFCNT_dec(list->array[i].arg);
498 }
499 Safefree(list->array);
500 }
501 Safefree(list);
502 }
503 }
fcf2db38
NIS		 504}
505
506void
3a1ee7e8 507PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 508{
14a5cf38
JH		 509 PerlIO_pair_t *p;
510 if (list->cur >= list->len) {
511 list->len += 8;
512 if (list->array)
513 Renew(list->array, list->len, PerlIO_pair_t);
514 else
515 New('l', list->array, list->len, PerlIO_pair_t);
516 }
517 p = &(list->array[list->cur++]);
518 p->funcs = funcs;
519 if ((p->arg = arg)) {
520 SvREFCNT_inc(arg);
521 }
fcf2db38
NIS		 522}
523
3a1ee7e8
NIS		 524PerlIO_list_t *
525PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
526{
694c95cf
JH		 527 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
528 if (proto) {
529 int i;
530 list = PerlIO_list_alloc(aTHX);
531 for (i=0; i < proto->cur; i++) {
532 SV *arg = Nullsv;
533 if (proto->array[i].arg)
534 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
535 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
536 }
3a1ee7e8
NIS		 537 }
538 return list;
539}
4a4a6116 540
05d1247b 541void
3a1ee7e8 542PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 543{
3aaf42a7 544#ifdef USE_ITHREADS
3a1ee7e8
NIS		 545 PerlIO **table = &proto->Iperlio;
546 PerlIO *f;
547 PL_perlio = NULL;
548 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
549 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
550 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 551 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS		 552 while ((f = *table)) {
553 int i;
554 table = (PerlIO **) (f++);
555 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
556 if (*f) {
93a8090d 557 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS		 558 }
559 f++;
560 }
561 }
3aaf42a7 562#endif
9a6404c5
DM		 563}
564
565void
13621cfb
NIS		 566PerlIO_destruct(pTHX)
567{
a1ea730d 568 PerlIO **table = &PL_perlio;
14a5cf38 569 PerlIO *f;
694c95cf
JH		 570#ifdef USE_ITHREADS
571 PerlIO_debug("Destruct %p\n",aTHX);
572#endif
14a5cf38
JH		 573 while ((f = *table)) {
574 int i;
575 table = (PerlIO **) (f++);
576 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
577 PerlIO *x = f;
578 PerlIOl *l;
579 while ((l = *x)) {
580 if (l->tab->kind & PERLIO_K_DESTRUCT) {
581 PerlIO_debug("Destruct popping %s\n", l->tab->name);
582 PerlIO_flush(x);
583 PerlIO_pop(aTHX_ x);
584 }
585 else {
586 x = PerlIONext(x);
587 }
588 }
589 f++;
590 }
591 }
3a1ee7e8
NIS		 592 PerlIO_list_free(aTHX_ PL_known_layers);
593 PL_known_layers = NULL;
594 PerlIO_list_free(aTHX_ PL_def_layerlist);
595 PL_def_layerlist = NULL;
13621cfb
NIS		 596}
597
598void
a999f61b 599PerlIO_pop(pTHX_ PerlIO *f)
760ac839 600{
14a5cf38
JH		 601 PerlIOl *l = *f;
602 if (l) {
603 PerlIO_debug("PerlIO_pop f=%p %s\n", f, l->tab->name);
604 if (l->tab->Popped) {
605 /*
606 * If popped returns non-zero do not free its layer structure
607 * it has either done so itself, or it is shared and still in
71200d45 608 * use
14a5cf38
JH		 609 */
610 if ((*l->tab->Popped) (f) != 0)
611 return;
612 }
613 *f = l->next;;
3a1ee7e8 614 Safefree(l);
a8c08ecd 615 }
6f9d8c32
NIS		 616}
617
9e353e3b 618/*--------------------------------------------------------------------------------------*/
14a5cf38 619/*
71200d45 620 * XS Interface for perl code
14a5cf38 621 */
9e353e3b 622
fcf2db38 623PerlIO_funcs *
2edd7e44 624PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 625{
14a5cf38
JH		 626 IV i;
627 if ((SSize_t) len <= 0)
628 len = strlen(name);
3a1ee7e8
NIS		 629 for (i = 0; i < PL_known_layers->cur; i++) {
630 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
14a5cf38
JH		 631 if (memEQ(f->name, name, len)) {
632 PerlIO_debug("%.*s => %p\n", (int) len, name, f);
633 return f;
634 }
635 }
3a1ee7e8
NIS		 636 if (load && PL_subname && PL_def_layerlist
637 && PL_def_layerlist->cur >= 2) {
14a5cf38
JH		 638 SV *pkgsv = newSVpvn("PerlIO", 6);
639 SV *layer = newSVpvn(name, len);
640 ENTER;
641 /*
71200d45 642 * The two SVs are magically freed by load_module
14a5cf38
JH		 643 */
644 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
645 LEAVE;
646 return PerlIO_find_layer(aTHX_ name, len, 0);
647 }
648 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
649 return NULL;
f3862f8b
NIS		 650}
651
2a1bc955 652#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 653
654static int
655perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
656{
14a5cf38
JH		 657 if (SvROK(sv)) {
658 IO *io = GvIOn((GV *) SvRV(sv));
659 PerlIO *ifp = IoIFP(io);
660 PerlIO *ofp = IoOFP(io);
661 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
662 }
663 return 0;
b13b2135
NIS		 664}
665
666static int
667perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
668{
14a5cf38
JH		 669 if (SvROK(sv)) {
670 IO *io = GvIOn((GV *) SvRV(sv));
671 PerlIO *ifp = IoIFP(io);
672 PerlIO *ofp = IoOFP(io);
673 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
674 }
675 return 0;
b13b2135
NIS		 676}
677
678static int
679perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
680{
14a5cf38
JH		 681 Perl_warn(aTHX_ "clear %" SVf, sv);
682 return 0;
b13b2135
NIS		 683}
684
685static int
686perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
687{
14a5cf38
JH		 688 Perl_warn(aTHX_ "free %" SVf, sv);
689 return 0;
b13b2135
NIS		 690}
691
692MGVTBL perlio_vtab = {
14a5cf38
JH		 693 perlio_mg_get,
694 perlio_mg_set,
695 NULL, /* len */
696 perlio_mg_clear,
697 perlio_mg_free
b13b2135
NIS		 698};
699
700XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
701{
14a5cf38
JH		 702 dXSARGS;
703 SV *sv = SvRV(ST(1));
704 AV *av = newAV();
705 MAGIC *mg;
706 int count = 0;
707 int i;
708 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
709 SvRMAGICAL_off(sv);
710 mg = mg_find(sv, PERL_MAGIC_ext);
711 mg->mg_virtual = &perlio_vtab;
712 mg_magical(sv);
713 Perl_warn(aTHX_ "attrib %" SVf, sv);
714 for (i = 2; i < items; i++) {
715 STRLEN len;
716 const char *name = SvPV(ST(i), len);
717 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
718 if (layer) {
719 av_push(av, SvREFCNT_inc(layer));
720 }
721 else {
722 ST(count) = ST(i);
723 count++;
724 }
725 }
726 SvREFCNT_dec(av);
727 XSRETURN(count);
728}
729
730#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 731
e3f3bf95
NIS		 732SV *
733PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 734{
14a5cf38
JH		 735 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
736 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
737 return sv;
e3f3bf95
NIS		 738}
739
0c4f7ff0
NIS		 740XS(XS_PerlIO__Layer__find)
741{
14a5cf38
JH		 742 dXSARGS;
743 if (items < 2)
744 Perl_croak(aTHX_ "Usage class->find(name[,load])");
745 else {
746 STRLEN len = 0;
747 char *name = SvPV(ST(1), len);
748 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
749 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
750 ST(0) =
751 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
752 &PL_sv_undef;
753 XSRETURN(1);
754 }
0c4f7ff0
NIS		 755}
756
e3f3bf95
NIS		 757void
758PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
759{
3a1ee7e8
NIS		 760 if (!PL_known_layers)
761 PL_known_layers = PerlIO_list_alloc(aTHX);
762 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
14a5cf38 763 PerlIO_debug("define %s %p\n", tab->name, tab);
f3862f8b
NIS		 764}
765
1141d9f8 766int
fcf2db38 767PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 768{
14a5cf38
JH		 769 if (names) {
770 const char *s = names;
771 while (*s) {
772 while (isSPACE(*s) || *s == ':')
773 s++;
774 if (*s) {
775 STRLEN llen = 0;
776 const char *e = s;
777 const char *as = Nullch;
778 STRLEN alen = 0;
779 if (!isIDFIRST(*s)) {
780 /*
781 * Message is consistent with how attribute lists are
782 * passed. Even though this means "foo : : bar" is
71200d45 783 * seen as an invalid separator character.
14a5cf38
JH		 784 */
785 char q = ((*s == '\'') ? '"' : '\'');
786 Perl_warn(aTHX_
1e616cf5
JH		 787 "perlio: invalid separator character %c%c%c in layer specification list %s",
788 q, *s, q, s);
14a5cf38
JH		 789 return -1;
790 }
791 do {
792 e++;
793 } while (isALNUM(*e));
794 llen = e - s;
795 if (*e == '(') {
796 int nesting = 1;
797 as = ++e;
798 while (nesting) {
799 switch (*e++) {
800 case ')':
801 if (--nesting == 0)
802 alen = (e - 1) - as;
803 break;
804 case '(':
805 ++nesting;
806 break;
807 case '\\':
808 /*
809 * It's a nul terminated string, not allowed
810 * to \ the terminating null. Anything other
71200d45 811 * character is passed over.
14a5cf38
JH		 812 */
813 if (*e++) {
814 break;
815 }
816 /*
71200d45 817 * Drop through
14a5cf38
JH		 818 */
819 case '\0':
820 e--;
821 Perl_warn(aTHX_
822 "perlio: argument list not closed for layer \"%.*s\"",
823 (int) (e - s), s);
824 return -1;
825 default:
826 /*
71200d45 827 * boring.
14a5cf38
JH		 828 */
829 break;
830 }
831 }
832 }
833 if (e > s) {
834 PerlIO_funcs *layer =
835 PerlIO_find_layer(aTHX_ s, llen, 1);
836 if (layer) {
3a1ee7e8 837 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH		 838 (as) ? newSVpvn(as,
839 alen) :
840 &PL_sv_undef);
841 }
842 else {
843 Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",
844 (int) llen, s);
845 return -1;
846 }
847 }
848 s = e;
849 }
850 }
851 }
852 return 0;
1141d9f8
NIS		 853}
854
dfebf958 855void
fcf2db38 856PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 857{
14a5cf38
JH		 858 PerlIO_funcs *tab = &PerlIO_perlio;
859 if (O_BINARY != O_TEXT) {
860 tab = &PerlIO_crlf;
861 }
862 else {
863 if (PerlIO_stdio.Set_ptrcnt) {
864 tab = &PerlIO_stdio;
865 }
dfebf958 866 }
14a5cf38 867 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 868 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 869 &PL_sv_undef);
dfebf958
NIS		 870}
871
e3f3bf95 872SV *
14a5cf38 873PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 874{
14a5cf38 875 return av->array[n].arg;
e3f3bf95
NIS		 876}
877
f3862f8b 878PerlIO_funcs *
14a5cf38 879PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 880{
14a5cf38
JH		 881 if (n >= 0 && n < av->cur) {
882 PerlIO_debug("Layer %" IVdf " is %s\n", n,
883 av->array[n].funcs->name);
884 return av->array[n].funcs;
885 }
886 if (!def)
887 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
888 return def;
e3f3bf95
NIS		 889}
890
fcf2db38 891PerlIO_list_t *
e3f3bf95
NIS		 892PerlIO_default_layers(pTHX)
893{
3a1ee7e8 894 if (!PL_def_layerlist) {
14a5cf38
JH		 895 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
896 PerlIO_funcs *osLayer = &PerlIO_unix;
3a1ee7e8 897 PL_def_layerlist = PerlIO_list_alloc(aTHX);
14a5cf38 898 PerlIO_define_layer(aTHX_ & PerlIO_unix);
e1caacb4 899#if defined(WIN32) && !defined(UNDER_CE)
14a5cf38 900 PerlIO_define_layer(aTHX_ & PerlIO_win32);
2f8118af 901#if 0
14a5cf38 902 osLayer = &PerlIO_win32;
0c4128ad 903#endif
2f8118af 904#endif
14a5cf38
JH		 905 PerlIO_define_layer(aTHX_ & PerlIO_raw);
906 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
907 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
908 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
06da4f11 909#ifdef HAS_MMAP
14a5cf38 910 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
06da4f11 911#endif
14a5cf38
JH		 912 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
913 PerlIO_define_layer(aTHX_ & PerlIO_byte);
3a1ee7e8 914 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH		 915 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
916 &PL_sv_undef);
917 if (s) {
3a1ee7e8 918 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 919 }
920 else {
3a1ee7e8 921 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 922 }
1141d9f8 923 }
3a1ee7e8
NIS		 924 if (PL_def_layerlist->cur < 2) {
925 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 926 }
3a1ee7e8 927 return PL_def_layerlist;
e3f3bf95
NIS		 928}
929
0c4f7ff0
NIS		 930void
931Perl_boot_core_PerlIO(pTHX)
932{
933#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 934 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
935 __FILE__);
0c4f7ff0 936#endif
14a5cf38 937 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0 938}
e3f3bf95
NIS		 939
940PerlIO_funcs *
941PerlIO_default_layer(pTHX_ I32 n)
942{
14a5cf38
JH		 943 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
944 if (n < 0)
945 n += av->cur;
946 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
f3862f8b
NIS		 947}
948
a999f61b
NIS		 949#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
950#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 951
952void
1141d9f8 953PerlIO_stdstreams(pTHX)
60382766 954{
a1ea730d 955 if (!PL_perlio) {
14a5cf38
JH		 956 PerlIO_allocate(aTHX);
957 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
958 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
959 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
960 }
60382766
NIS		 961}
962
963PerlIO *
14a5cf38
JH		 964PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
965{
966 PerlIOl *l = NULL;
3a1ee7e8 967 Newc('L',l,tab->size,char,PerlIOl);
14a5cf38
JH		 968 if (l) {
969 Zero(l, tab->size, char);
970 l->next = *f;
971 l->tab = tab;
972 *f = l;
973 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", f, tab->name,
974 (mode) ? mode : "(Null)", arg);
975 if ((*l->tab->Pushed) (f, mode, arg) != 0) {
976 PerlIO_pop(aTHX_ f);
977 return NULL;
978 }
979 }
980 return f;
60382766
NIS		 981}
982
dfebf958 983IV
e3f3bf95 984PerlIOPop_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 985{
14a5cf38
JH		 986 dTHX;
987 PerlIO_pop(aTHX_ f);
988 if (*f) {
989 PerlIO_flush(f);
990 PerlIO_pop(aTHX_ f);
991 return 0;
992 }
993 return -1;
4b803d04
NIS		 994}
995
996IV
e3f3bf95 997PerlIORaw_pushed(PerlIO *f, const char *mode, SV *arg)
dfebf958 998{
14a5cf38 999 /*
71200d45 1000 * Remove the dummy layer
14a5cf38
JH		 1001 */
1002 dTHX;
1003 PerlIO_pop(aTHX_ f);
1004 /*
71200d45 1005 * Pop back to bottom layer
14a5cf38
JH		 1006 */
1007 if (f && *f) {
1008 PerlIO_flush(f);
1009 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1010 if (*PerlIONext(f)) {
1011 PerlIO_pop(aTHX_ f);
1012 }
1013 else {
1014 /*
71200d45 1015 * Nothing bellow - push unix on top then remove it
14a5cf38
JH		 1016 */
1017 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1018 PerlIO_pop(aTHX_ PerlIONext(f));
1019 }
1020 break;
1021 }
1022 }
1023 PerlIO_debug(":raw f=%p :%s\n", f, PerlIOBase(f)->tab->name);
1024 return 0;
1025 }
1026 return -1;
dfebf958
NIS		 1027}
1028
ac27b0f5 1029int
14a5cf38
JH		 1030PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1031 PerlIO_list_t *layers, IV n)
1032{
1033 IV max = layers->cur;
1034 int code = 0;
1035 while (n < max) {
1036 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1037 if (tab) {
1038 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1039 code = -1;
1040 break;
1041 }
1042 }
1043 n++;
1044 }
1045 return code;
e3f3bf95
NIS		 1046}
1047
1048int
ac27b0f5
NIS		 1049PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1050{
14a5cf38
JH		 1051 int code = 0;
1052 if (names) {
3a1ee7e8 1053 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1054 code = PerlIO_parse_layers(aTHX_ layers, names);
1055 if (code == 0) {
1056 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1057 }
3a1ee7e8 1058 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1059 }
14a5cf38 1060 return code;
ac27b0f5
NIS		 1061}
1062
f3862f8b 1063
60382766 1064/*--------------------------------------------------------------------------------------*/
14a5cf38 1065/*
71200d45 1066 * Given the abstraction above the public API functions
14a5cf38 1067 */
60382766
NIS		 1068
1069int
f5b9d040 1070PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1071{
14a5cf38
JH		 1072 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1073 f, PerlIOBase(f)->tab->name, iotype, mode,
1074 (names) ? names : "(Null)");
89aec743 1075 PerlIO_flush(f);
14a5cf38
JH		 1076 if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY))) {
1077 PerlIO *top = f;
1078 while (*top) {
1079 if (PerlIOBase(top)->tab == &PerlIO_crlf) {
14a5cf38
JH		 1080 PerlIOBase(top)->flags &= ~PERLIO_F_CRLF;
1081 break;
1082 }
1083 top = PerlIONext(top);
89aec743 1084 PerlIO_flush(top);
14a5cf38
JH		 1085 }
1086 }
1087 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
f5b9d040
NIS		 1088}
1089
1090#undef PerlIO__close
1091int
1092PerlIO__close(PerlIO *f)
1093{
14a5cf38
JH		 1094 if (f && *f)
1095 return (*PerlIOBase(f)->tab->Close) (f);
1096 else {
1097 SETERRNO(EBADF, SS$_IVCHAN);
1098 return -1;
1099 }
76ced9ad
NIS		 1100}
1101
b931b1d9
NIS		 1102#undef PerlIO_close
1103int
1104PerlIO_close(PerlIO *f)
1105{
14a5cf38
JH		 1106 dTHX;
1107 int code = -1;
1108 if (f && *f) {
1109 code = (*PerlIOBase(f)->tab->Close) (f);
1110 while (*f) {
1111 PerlIO_pop(aTHX_ f);
1112 }
f6c77cf1 1113 }
14a5cf38 1114 return code;
b931b1d9
NIS		 1115}
1116
1117#undef PerlIO_fileno
1118int
1119PerlIO_fileno(PerlIO *f)
1120{
14a5cf38
JH		 1121 if (f && *f)
1122 return (*PerlIOBase(f)->tab->Fileno) (f);
1123 else {
1124 SETERRNO(EBADF, SS$_IVCHAN);
1125 return -1;
1126 }
b931b1d9
NIS		 1127}
1128
1141d9f8
NIS		 1129static const char *
1130PerlIO_context_layers(pTHX_ const char *mode)
1131{
14a5cf38
JH		 1132 const char *type = NULL;
1133 /*
71200d45 1134 * Need to supply default layer info from open.pm
14a5cf38
JH		 1135 */
1136 if (PL_curcop) {
1137 SV *layers = PL_curcop->cop_io;
1138 if (layers) {
1139 STRLEN len;
1140 type = SvPV(layers, len);
1141 if (type && mode[0] != 'r') {
1142 /*
71200d45 1143 * Skip to write part
14a5cf38
JH		 1144 */
1145 const char *s = strchr(type, 0);
1146 if (s && (s - type) < len) {
1147 type = s + 1;
1148 }
1149 }
1150 }
1151 }
1152 return type;
1141d9f8
NIS		 1153}
1154
fcf2db38 1155static PerlIO_funcs *
2edd7e44
NIS		 1156PerlIO_layer_from_ref(pTHX_ SV *sv)
1157{
14a5cf38 1158 /*
71200d45 1159 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH		 1160 */
1161 if (SvTYPE(sv) < SVt_PVAV)
1162 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1163
1164 /*
71200d45 1165 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1166 */
1167 switch (SvTYPE(sv)) {
1168 case SVt_PVAV:
1169 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1170 case SVt_PVHV:
1171 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1172 case SVt_PVCV:
1173 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1174 case SVt_PVGV:
1175 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1176 }
1177 return NULL;
2edd7e44
NIS		 1178}
1179
fcf2db38 1180PerlIO_list_t *
14a5cf38
JH		 1181PerlIO_resolve_layers(pTHX_ const char *layers,
1182 const char *mode, int narg, SV **args)
1183{
1184 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1185 int incdef = 1;
a1ea730d 1186 if (!PL_perlio)
14a5cf38
JH		 1187 PerlIO_stdstreams(aTHX);
1188 if (narg) {
1189 SV *arg = *args;
1190 /*
71200d45
NIS		 1191 * If it is a reference but not an object see if we have a handler
1192 * for it
14a5cf38
JH		 1193 */
1194 if (SvROK(arg) && !sv_isobject(arg)) {
1195 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1196 if (handler) {
3a1ee7e8
NIS		 1197 def = PerlIO_list_alloc(aTHX);
1198 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1199 incdef = 0;
1200 }
1201 /*
71200d45 1202 * Don't fail if handler cannot be found :Via(...) etc. may do
14a5cf38 1203 * something sensible else we will just stringfy and open
71200d45 1204 * resulting string.
14a5cf38
JH		 1205 */
1206 }
1207 }
1208 if (!layers)
1209 layers = PerlIO_context_layers(aTHX_ mode);
1210 if (layers && *layers) {
1211 PerlIO_list_t *av;
1212 if (incdef) {
1213 IV i = def->cur;
3a1ee7e8 1214 av = PerlIO_list_alloc(aTHX);
14a5cf38 1215 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1216 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH		 1217 def->array[i].arg);
1218 }
1219 }
1220 else {
1221 av = def;
1222 }
1223 PerlIO_parse_layers(aTHX_ av, layers);
1224 return av;
1225 }
1226 else {
1227 if (incdef)
1228 def->refcnt++;
1229 return def;
1230 }
ee518936
NIS		 1231}
1232
1233PerlIO *
14a5cf38
JH		 1234PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1235 int imode, int perm, PerlIO *f, int narg, SV **args)
1236{
1237 if (!f && narg == 1 && *args == &PL_sv_undef) {
1238 if ((f = PerlIO_tmpfile())) {
1239 if (!layers)
1240 layers = PerlIO_context_layers(aTHX_ mode);
1241 if (layers && *layers)
1242 PerlIO_apply_layers(aTHX_ f, mode, layers);
1243 }
1244 }
1245 else {
1246 PerlIO_list_t *layera = NULL;
1247 IV n;
1248 PerlIO_funcs *tab = NULL;
1249 if (f && *f) {
1250 /*
71200d45
NIS		 1251 * This is "reopen" - it is not tested as perl does not use it
1252 * yet
14a5cf38
JH		 1253 */
1254 PerlIOl *l = *f;
3a1ee7e8 1255 layera = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1256 while (l) {
1257 SV *arg =
1258 (l->tab->Getarg) ? (*l->tab->
1259 Getarg) (&l) : &PL_sv_undef;
3a1ee7e8 1260 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH		 1261 l = *PerlIONext(&l);
1262 }
1263 }
1264 else {
1265 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1266 }
1267 /*
71200d45 1268 * Start at "top" of layer stack
14a5cf38
JH		 1269 */
1270 n = layera->cur - 1;
1271 while (n >= 0) {
1272 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1273 if (t && t->Open) {
1274 tab = t;
1275 break;
1276 }
1277 n--;
1278 }
1279 if (tab) {
1280 /*
71200d45 1281 * Found that layer 'n' can do opens - call it
14a5cf38
JH		 1282 */
1283 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1284 tab->name, layers, mode, fd, imode, perm, f, narg,
1285 args);
1286 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1287 f, narg, args);
1288 if (f) {
1289 if (n + 1 < layera->cur) {
1290 /*
1291 * More layers above the one that we used to open -
71200d45 1292 * apply them now
14a5cf38
JH		 1293 */
1294 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1295 != 0) {
1296 f = NULL;
1297 }
1298 }
1299 }
1300 }
3a1ee7e8 1301 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1302 }
1303 return f;
ee518936 1304}
b931b1d9
NIS		 1305
1306
9e353e3b
NIS		 1307#undef PerlIO_fdopen
1308PerlIO *
1309PerlIO_fdopen(int fd, const char *mode)
1310{
14a5cf38
JH		 1311 dTHX;
1312 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
9e353e3b
NIS		 1313}
1314
6f9d8c32
NIS		 1315#undef PerlIO_open
1316PerlIO *
1317PerlIO_open(const char *path, const char *mode)
1318{
14a5cf38
JH		 1319 dTHX;
1320 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1321 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
6f9d8c32
NIS		 1322}
1323
9e353e3b
NIS		 1324#undef PerlIO_reopen
1325PerlIO *
1326PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
6f9d8c32 1327{
14a5cf38
JH		 1328 dTHX;
1329 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
1330 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
760ac839
LW		 1331}
1332
9e353e3b
NIS		 1333#undef PerlIO_read
1334SSize_t
1335PerlIO_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1336{
14a5cf38
JH		 1337 if (f && *f)
1338 return (*PerlIOBase(f)->tab->Read) (f, vbuf, count);
1339 else {
1340 SETERRNO(EBADF, SS$_IVCHAN);
1341 return -1;
1342 }
760ac839
LW		 1343}
1344
313ca112
NIS		 1345#undef PerlIO_unread
1346SSize_t
1347PerlIO_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1348{
14a5cf38
JH		 1349 if (f && *f)
1350 return (*PerlIOBase(f)->tab->Unread) (f, vbuf, count);
1351 else {
1352 SETERRNO(EBADF, SS$_IVCHAN);
1353 return -1;
1354 }
760ac839
LW		 1355}
1356
9e353e3b
NIS		 1357#undef PerlIO_write
1358SSize_t
1359PerlIO_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 1360{
14a5cf38
JH		 1361 if (f && *f)
1362 return (*PerlIOBase(f)->tab->Write) (f, vbuf, count);
1363 else {
1364 SETERRNO(EBADF, SS$_IVCHAN);
1365 return -1;
1366 }
760ac839
LW		 1367}
1368
9e353e3b 1369#undef PerlIO_seek
6f9d8c32 1370int
9e353e3b 1371PerlIO_seek(PerlIO *f, Off_t offset, int whence)
760ac839 1372{
14a5cf38
JH		 1373 if (f && *f)
1374 return (*PerlIOBase(f)->tab->Seek) (f, offset, whence);
1375 else {
1376 SETERRNO(EBADF, SS$_IVCHAN);
1377 return -1;
1378 }
760ac839
LW		 1379}
1380
9e353e3b
NIS		 1381#undef PerlIO_tell
1382Off_t
1383PerlIO_tell(PerlIO *f)
760ac839 1384{
14a5cf38
JH		 1385 if (f && *f)
1386 return (*PerlIOBase(f)->tab->Tell) (f);
1387 else {
1388 SETERRNO(EBADF, SS$_IVCHAN);
1389 return -1;
1390 }
760ac839
LW		 1391}
1392
9e353e3b 1393#undef PerlIO_flush
6f9d8c32 1394int
9e353e3b 1395PerlIO_flush(PerlIO *f)
760ac839 1396{
14a5cf38
JH		 1397 if (f) {
1398 if (*f) {
1399 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1400 if (tab && tab->Flush) {
1401 return (*tab->Flush) (f);
1402 }
1403 else {
1404 PerlIO_debug("Cannot flush f=%p :%s\n", f, tab->name);
1405 SETERRNO(EBADF, SS$_IVCHAN);
1406 return -1;
1407 }
1408 }
1409 else {
1410 PerlIO_debug("Cannot flush f=%p\n", f);
1411 SETERRNO(EBADF, SS$_IVCHAN);
1412 return -1;
1413 }
1414 }
1415 else {
1416 /*
1417 * Is it good API design to do flush-all on NULL, a potentially
1418 * errorneous input? Maybe some magical value (PerlIO*
1419 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1420 * things on fflush(NULL), but should we be bound by their design
71200d45 1421 * decisions? --jhi
14a5cf38 1422 */
a1ea730d
NIS		 1423 dTHX;
1424 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1425 int code = 0;
1426 while ((f = *table)) {
1427 int i;
1428 table = (PerlIO **) (f++);
1429 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1430 if (*f && PerlIO_flush(f) != 0)
1431 code = -1;
1432 f++;
1433 }
1434 }
1435 return code;
1436 }
760ac839
LW		 1437}
1438
a9c883f6
NIS		 1439void
1440PerlIOBase_flush_linebuf()
1441{
a1ea730d
NIS		 1442 dTHX;
1443 PerlIO **table = &PL_perlio;
14a5cf38
JH		 1444 PerlIO *f;
1445 while ((f = *table)) {
1446 int i;
1447 table = (PerlIO **) (f++);
1448 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1449 if (*f
1450 && (PerlIOBase(f)->
1451 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1452 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1453 PerlIO_flush(f);
1454 f++;
1455 }
a9c883f6 1456 }
a9c883f6
NIS		 1457}
1458
06da4f11
NIS		 1459#undef PerlIO_fill
1460int
1461PerlIO_fill(PerlIO *f)
1462{
14a5cf38
JH		 1463 if (f && *f)
1464 return (*PerlIOBase(f)->tab->Fill) (f);
1465 else {
1466 SETERRNO(EBADF, SS$_IVCHAN);
1467 return -1;
1468 }
06da4f11
NIS		 1469}
1470
f3862f8b
NIS		 1471#undef PerlIO_isutf8
1472int
1473PerlIO_isutf8(PerlIO *f)
1474{
14a5cf38
JH		 1475 if (f && *f)
1476 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1477 else {
1478 SETERRNO(EBADF, SS$_IVCHAN);
1479 return -1;
1480 }
f3862f8b
NIS		 1481}
1482
9e353e3b 1483#undef PerlIO_eof
6f9d8c32 1484int
9e353e3b 1485PerlIO_eof(PerlIO *f)
760ac839 1486{
14a5cf38
JH		 1487 if (f && *f)
1488 return (*PerlIOBase(f)->tab->Eof) (f);
1489 else {
1490 SETERRNO(EBADF, SS$_IVCHAN);
1491 return -1;
1492 }
9e353e3b
NIS		 1493}
1494
1495#undef PerlIO_error
1496int
1497PerlIO_error(PerlIO *f)
1498{
14a5cf38
JH		 1499 if (f && *f)
1500 return (*PerlIOBase(f)->tab->Error) (f);
1501 else {
1502 SETERRNO(EBADF, SS$_IVCHAN);
1503 return -1;
1504 }
9e353e3b
NIS		 1505}
1506
1507#undef PerlIO_clearerr
1508void
1509PerlIO_clearerr(PerlIO *f)
1510{
14a5cf38
JH		 1511 if (f && *f)
1512 (*PerlIOBase(f)->tab->Clearerr) (f);
1513 else
1514 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1515}
1516
1517#undef PerlIO_setlinebuf
1518void
1519PerlIO_setlinebuf(PerlIO *f)
1520{
14a5cf38
JH		 1521 if (f && *f)
1522 (*PerlIOBase(f)->tab->Setlinebuf) (f);
1523 else
1524 SETERRNO(EBADF, SS$_IVCHAN);
9e353e3b
NIS		 1525}
1526
1527#undef PerlIO_has_base
1528int
1529PerlIO_has_base(PerlIO *f)
1530{
14a5cf38
JH		 1531 if (f && *f) {
1532 return (PerlIOBase(f)->tab->Get_base != NULL);
1533 }
1534 return 0;
760ac839
LW		 1535}
1536
9e353e3b
NIS		 1537#undef PerlIO_fast_gets
1538int
1539PerlIO_fast_gets(PerlIO *f)
760ac839 1540{
14a5cf38
JH		 1541 if (f && *f && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1542 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1543 return (tab->Set_ptrcnt != NULL);
1544 }
1545 return 0;
9e353e3b
NIS		 1546}
1547
1548#undef PerlIO_has_cntptr
1549int
1550PerlIO_has_cntptr(PerlIO *f)
1551{
14a5cf38
JH		 1552 if (f && *f) {
1553 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1554 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1555 }
1556 return 0;
9e353e3b
NIS		 1557}
1558
1559#undef PerlIO_canset_cnt
1560int
1561PerlIO_canset_cnt(PerlIO *f)
1562{
14a5cf38
JH		 1563 if (f && *f) {
1564 PerlIOl *l = PerlIOBase(f);
1565 return (l->tab->Set_ptrcnt != NULL);
1566 }
1567 return 0;
760ac839
LW		 1568}
1569
1570#undef PerlIO_get_base
888911fc 1571STDCHAR *
a20bf0c3 1572PerlIO_get_base(PerlIO *f)
760ac839 1573{
14a5cf38
JH		 1574 if (f && *f)
1575 return (*PerlIOBase(f)->tab->Get_base) (f);
1576 return NULL;
9e353e3b
NIS		 1577}
1578
1579#undef PerlIO_get_bufsiz
1580int
1581PerlIO_get_bufsiz(PerlIO *f)
1582{
14a5cf38
JH		 1583 if (f && *f)
1584 return (*PerlIOBase(f)->tab->Get_bufsiz) (f);
1585 return 0;
9e353e3b
NIS		 1586}
1587
1588#undef PerlIO_get_ptr
1589STDCHAR *
1590PerlIO_get_ptr(PerlIO *f)
1591{
14a5cf38
JH		 1592 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1593 if (tab->Get_ptr == NULL)
1594 return NULL;
1595 return (*tab->Get_ptr) (f);
9e353e3b
NIS		 1596}
1597
1598#undef PerlIO_get_cnt
05d1247b 1599int
9e353e3b
NIS		 1600PerlIO_get_cnt(PerlIO *f)
1601{
14a5cf38
JH		 1602 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1603 if (tab->Get_cnt == NULL)
1604 return 0;
1605 return (*tab->Get_cnt) (f);
9e353e3b
NIS		 1606}
1607
1608#undef PerlIO_set_cnt
1609void
14a5cf38 1610PerlIO_set_cnt(PerlIO *f, int cnt)
9e353e3b 1611{
14a5cf38 1612 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, NULL, cnt);
9e353e3b
NIS		 1613}
1614
1615#undef PerlIO_set_ptrcnt
1616void
14a5cf38 1617PerlIO_set_ptrcnt(PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1618{
14a5cf38
JH		 1619 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1620 if (tab->Set_ptrcnt == NULL) {
1621 dTHX;
1622 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1623 }
1624 (*PerlIOBase(f)->tab->Set_ptrcnt) (f, ptr, cnt);
9e353e3b
NIS		 1625}
1626
1627/*--------------------------------------------------------------------------------------*/
14a5cf38 1628/*
71200d45 1629 * utf8 and raw dummy layers
14a5cf38 1630 */
dfebf958 1631
26fb694e 1632IV
e3f3bf95 1633PerlIOUtf8_pushed(PerlIO *f, const char *mode, SV *arg)
26fb694e 1634{
14a5cf38
JH		 1635 if (PerlIONext(f)) {
1636 dTHX;
1637 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1638 PerlIO_pop(aTHX_ f);
1639 if (tab->kind & PERLIO_K_UTF8)
1640 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1641 else
1642 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1643 return 0;
1644 }
1645 return -1;
26fb694e
NIS		 1646}
1647
dfebf958 1648PerlIO_funcs PerlIO_utf8 = {
14a5cf38
JH		 1649 "utf8",
1650 sizeof(PerlIOl),
1651 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1652 PerlIOUtf8_pushed,
1653 NULL,
1654 NULL,
1655 NULL,
1656 NULL,
1657 NULL,
1658 NULL,
1659 NULL,
1660 NULL,
1661 NULL,
1662 NULL,
1663 NULL, /* flush */
1664 NULL, /* fill */
1665 NULL,
1666 NULL,
1667 NULL,
1668 NULL,
1669 NULL, /* get_base */
1670 NULL, /* get_bufsiz */
1671 NULL, /* get_ptr */
1672 NULL, /* get_cnt */
1673 NULL, /* set_ptrcnt */
26fb694e
NIS		 1674};
1675
1676PerlIO_funcs PerlIO_byte = {
14a5cf38
JH		 1677 "bytes",
1678 sizeof(PerlIOl),
1679 PERLIO_K_DUMMY,
1680 PerlIOUtf8_pushed,
1681 NULL,
1682 NULL,
1683 NULL,
1684 NULL,
1685 NULL,
1686 NULL,
1687 NULL,
1688 NULL,
1689 NULL,
1690 NULL,
1691 NULL, /* flush */
1692 NULL, /* fill */
1693 NULL,
1694 NULL,
1695 NULL,
1696 NULL,
1697 NULL, /* get_base */
1698 NULL, /* get_bufsiz */
1699 NULL, /* get_ptr */
1700 NULL, /* get_cnt */
1701 NULL, /* set_ptrcnt */
dfebf958
NIS		 1702};
1703
1704PerlIO *
14a5cf38
JH		 1705PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1706 IV n, const char *mode, int fd, int imode, int perm,
1707 PerlIO *old, int narg, SV **args)
dfebf958 1708{
14a5cf38
JH		 1709 PerlIO_funcs *tab = PerlIO_default_btm();
1710 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1711 old, narg, args);
dfebf958
NIS		 1712}
1713
1714PerlIO_funcs PerlIO_raw = {
14a5cf38
JH		 1715 "raw",
1716 sizeof(PerlIOl),
1717 PERLIO_K_DUMMY,
1718 PerlIORaw_pushed,
1719 PerlIOBase_popped,
1720 PerlIORaw_open,
1721 NULL,
1722 NULL,
1723 NULL,
1724 NULL,
1725 NULL,
1726 NULL,
1727 NULL,
1728 NULL,
1729 NULL, /* flush */
1730 NULL, /* fill */
1731 NULL,
1732 NULL,
1733 NULL,
1734 NULL,
1735 NULL, /* get_base */
1736 NULL, /* get_bufsiz */
1737 NULL, /* get_ptr */
1738 NULL, /* get_cnt */
1739 NULL, /* set_ptrcnt */
dfebf958
NIS		 1740};
1741/*--------------------------------------------------------------------------------------*/
1742/*--------------------------------------------------------------------------------------*/
14a5cf38 1743/*
71200d45 1744 * "Methods" of the "base class"
14a5cf38 1745 */
9e353e3b
NIS		 1746
1747IV
1748PerlIOBase_fileno(PerlIO *f)
1749{
14a5cf38 1750 return PerlIO_fileno(PerlIONext(f));
9e353e3b
NIS		 1751}
1752
f5b9d040 1753char *
14a5cf38
JH		 1754PerlIO_modestr(PerlIO *f, char *buf)
1755{
1756 char *s = buf;
1757 IV flags = PerlIOBase(f)->flags;
1758 if (flags & PERLIO_F_APPEND) {
1759 *s++ = 'a';
1760 if (flags & PERLIO_F_CANREAD) {
1761 *s++ = '+';
1762 }
1763 }
1764 else if (flags & PERLIO_F_CANREAD) {
1765 *s++ = 'r';
1766 if (flags & PERLIO_F_CANWRITE)
1767 *s++ = '+';
1768 }
1769 else if (flags & PERLIO_F_CANWRITE) {
1770 *s++ = 'w';
1771 if (flags & PERLIO_F_CANREAD) {
1772 *s++ = '+';
1773 }
1774 }
5f1a76d0 1775#if O_TEXT != O_BINARY
14a5cf38
JH		 1776 if (!(flags & PERLIO_F_CRLF))
1777 *s++ = 'b';
5f1a76d0 1778#endif
14a5cf38
JH		 1779 *s = '\0';
1780 return buf;
f5b9d040
NIS		 1781}
1782
76ced9ad 1783IV
e3f3bf95 1784PerlIOBase_pushed(PerlIO *f, const char *mode, SV *arg)
9e353e3b 1785{
14a5cf38 1786 PerlIOl *l = PerlIOBase(f);
b7953727 1787#if 0
14a5cf38
JH		 1788 const char *omode = mode;
1789 char temp[8];
b7953727 1790#endif
14a5cf38
JH		 1791 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1792 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1793 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1794 if (tab->Set_ptrcnt != NULL)
1795 l->flags |= PERLIO_F_FASTGETS;
1796 if (mode) {
1797 if (*mode == '#' || *mode == 'I')
1798 mode++;
1799 switch (*mode++) {
1800 case 'r':
1801 l->flags |= PERLIO_F_CANREAD;
1802 break;
1803 case 'a':
1804 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1805 break;
1806 case 'w':
1807 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1808 break;
1809 default:
1810 SETERRNO(EINVAL, LIB$_INVARG);
1811 return -1;
1812 }
1813 while (*mode) {
1814 switch (*mode++) {
1815 case '+':
1816 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1817 break;
1818 case 'b':
1819 l->flags &= ~PERLIO_F_CRLF;
1820 break;
1821 case 't':
1822 l->flags |= PERLIO_F_CRLF;
1823 break;
1824 default:
1825 SETERRNO(EINVAL, LIB$_INVARG);
1826 return -1;
1827 }
1828 }
1829 }
1830 else {
1831 if (l->next) {
1832 l->flags |= l->next->flags &
1833 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1834 PERLIO_F_APPEND);
1835 }
1836 }
5e2ab84b 1837#if 0
14a5cf38
JH		 1838 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1839 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1840 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 1841#endif
14a5cf38 1842 return 0;
76ced9ad
NIS		 1843}
1844
1845IV
1846PerlIOBase_popped(PerlIO *f)
1847{
14a5cf38 1848 return 0;
760ac839
LW		 1849}
1850
9e353e3b
NIS		 1851SSize_t
1852PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
1853{
14a5cf38
JH		 1854 dTHX;
1855 /*
71200d45 1856 * Save the position as current head considers it
14a5cf38
JH		 1857 */
1858 Off_t old = PerlIO_tell(f);
1859 SSize_t done;
1860 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1861 PerlIOSelf(f, PerlIOBuf)->posn = old;
1862 done = PerlIOBuf_unread(f, vbuf, count);
1863 return done;
9e353e3b
NIS		 1864}
1865
f6c77cf1
NIS		 1866SSize_t
1867PerlIOBase_read(PerlIO *f, void *vbuf, Size_t count)
1868{
14a5cf38
JH		 1869 STDCHAR *buf = (STDCHAR *) vbuf;
1870 if (f) {
1871 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1872 return 0;
1873 while (count > 0) {
1874 SSize_t avail = PerlIO_get_cnt(f);
1875 SSize_t take = 0;
1876 if (avail > 0)
1877 take = (count < avail) ? count : avail;
1878 if (take > 0) {
1879 STDCHAR *ptr = PerlIO_get_ptr(f);
1880 Copy(ptr, buf, take, STDCHAR);
1881 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1882 count -= take;
1883 buf += take;
1884 }
1885 if (count > 0 && avail <= 0) {
1886 if (PerlIO_fill(f) != 0)
1887 break;
1888 }
1889 }
1890 return (buf - (STDCHAR *) vbuf);
1891 }
f6c77cf1 1892 return 0;
f6c77cf1
NIS		 1893}
1894
9e353e3b 1895IV
06da4f11 1896PerlIOBase_noop_ok(PerlIO *f)
9e353e3b 1897{
14a5cf38 1898 return 0;
9e353e3b
NIS		 1899}
1900
1901IV
06da4f11
NIS		 1902PerlIOBase_noop_fail(PerlIO *f)
1903{
14a5cf38 1904 return -1;
06da4f11
NIS		 1905}
1906
1907IV
9e353e3b
NIS		 1908PerlIOBase_close(PerlIO *f)
1909{
14a5cf38
JH		 1910 IV code = 0;
1911 PerlIO *n = PerlIONext(f);
1912 if (PerlIO_flush(f) != 0)
1913 code = -1;
1914 if (n && *n && (*PerlIOBase(n)->tab->Close) (n) != 0)
1915 code = -1;
1916 PerlIOBase(f)->flags &=
1917 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1918 return code;
9e353e3b
NIS		 1919}
1920
1921IV
1922PerlIOBase_eof(PerlIO *f)
1923{
14a5cf38
JH		 1924 if (f && *f) {
1925 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1926 }
1927 return 1;
9e353e3b
NIS		 1928}
1929
1930IV
1931PerlIOBase_error(PerlIO *f)
1932{
14a5cf38
JH		 1933 if (f && *f) {
1934 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1935 }
1936 return 1;
9e353e3b
NIS		 1937}
1938
1939void
1940PerlIOBase_clearerr(PerlIO *f)
1941{
14a5cf38
JH		 1942 if (f && *f) {
1943 PerlIO *n = PerlIONext(f);
1944 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1945 if (n)
1946 PerlIO_clearerr(n);
1947 }
9e353e3b
NIS		 1948}
1949
1950void
1951PerlIOBase_setlinebuf(PerlIO *f)
1952{
14a5cf38
JH		 1953 if (f) {
1954 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1955 }
9e353e3b
NIS		 1956}
1957
93a8090d
NIS		 1958SV *
1959PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1960{
1961 if (!arg)
1962 return Nullsv;
1963#ifdef sv_dup
1964 if (param) {
1965 return sv_dup(arg, param);
1966 }
1967 else {
1968 return newSVsv(arg);
1969 }
1970#else
1971 return newSVsv(arg);
1972#endif
1973}
1974
1975PerlIO *
1976PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
1977{
1978 PerlIO *nexto = PerlIONext(o);
1979 if (*nexto) {
1980 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
1981 f = (*tab->Dup)(aTHX_ f, nexto, param);
1982 }
1983 if (f) {
1984 PerlIO_funcs *self = PerlIOBase(o)->tab;
1985 SV *arg = Nullsv;
1986 char buf[8];
1987 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",self->name,f,o,param);
1988 if (self->Getarg) {
1989 arg = (*self->Getarg)(o);
1990 if (arg) {
1991 arg = PerlIO_sv_dup(aTHX_ arg, param);
1992 }
1993 }
1994 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
1995 if (!f && arg) {
1996 SvREFCNT_dec(arg);
1997 }
1998 }
1999 return f;
2000}
2001
2002#define PERLIO_MAX_REFCOUNTABLE_FD 2048
168d5872 2003#ifdef USE_THREADS
93a8090d 2004perl_mutex PerlIO_mutex;
93a8090d 2005#endif
168d5872 2006int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
93a8090d
NIS		 2007
2008void
2009PerlIO_init(pTHX)
2010{
2011 /* Place holder for stdstreams call ??? */
168d5872 2012#ifdef USE_THREADS
93a8090d
NIS		 2013 MUTEX_INIT(&PerlIO_mutex);
2014#endif
2015}
2016
168d5872
NIS		 2017void
2018PerlIOUnix_refcnt_inc(int fd)
2019{
2020 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2021#ifdef USE_THREADS
2022 MUTEX_LOCK(&PerlIO_mutex);
2023#endif
2024 PerlIO_fd_refcnt[fd]++;
2025 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2026#ifdef USE_THREADS
2027 MUTEX_UNLOCK(&PerlIO_mutex);
2028#endif
2029 }
2030}
2031
168d5872
NIS		 2032int
2033PerlIOUnix_refcnt_dec(int fd)
2034{
2035 int cnt = 0;
2036 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2037#ifdef USE_THREADS
2038 MUTEX_LOCK(&PerlIO_mutex);
2039#endif
2040 cnt = --PerlIO_fd_refcnt[fd];
2041 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2042#ifdef USE_THREADS
2043 MUTEX_UNLOCK(&PerlIO_mutex);
2044#endif
2045 }
2046 return cnt;
2047}
2048
694c95cf
JH		 2049void
2050PerlIO_cleanup(pTHX)
2051{
2052 int i;
2053#ifdef USE_ITHREADS
2054 PerlIO_debug("Cleanup %p\n",aTHX);
2055#endif
2056 /* Raise STDIN..STDERR refcount so we don't close them */
2057 for (i=0; i < 3; i++)
2058 PerlIOUnix_refcnt_inc(i);
2059 PerlIO_cleantable(aTHX_ &PL_perlio);
2060 /* Restore STDIN..STDERR refcount */
2061 for (i=0; i < 3; i++)
2062 PerlIOUnix_refcnt_dec(i);
2063}
2064
2065
2066
9e353e3b 2067/*--------------------------------------------------------------------------------------*/
14a5cf38 2068/*
71200d45 2069 * Bottom-most level for UNIX-like case
14a5cf38 2070 */
9e353e3b 2071
14a5cf38
JH		 2072typedef struct {
2073 struct _PerlIO base; /* The generic part */
2074 int fd; /* UNIX like file descriptor */
2075 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2076} PerlIOUnix;
2077
6f9d8c32 2078int
9e353e3b 2079PerlIOUnix_oflags(const char *mode)
760ac839 2080{
14a5cf38
JH		 2081 int oflags = -1;
2082 if (*mode == 'I' || *mode == '#')
2083 mode++;
2084 switch (*mode) {
2085 case 'r':
2086 oflags = O_RDONLY;
2087 if (*++mode == '+') {
2088 oflags = O_RDWR;
2089 mode++;
2090 }
2091 break;
2092
2093 case 'w':
2094 oflags = O_CREAT | O_TRUNC;
2095 if (*++mode == '+') {
2096 oflags |= O_RDWR;
2097 mode++;
2098 }
2099 else
2100 oflags |= O_WRONLY;
2101 break;
2102
2103 case 'a':
2104 oflags = O_CREAT | O_APPEND;
2105 if (*++mode == '+') {
2106 oflags |= O_RDWR;
2107 mode++;
2108 }
2109 else
2110 oflags |= O_WRONLY;
2111 break;
2112 }
2113 if (*mode == 'b') {
2114 oflags |= O_BINARY;
2115 oflags &= ~O_TEXT;
2116 mode++;
2117 }
2118 else if (*mode == 't') {
2119 oflags |= O_TEXT;
2120 oflags &= ~O_BINARY;
2121 mode++;
2122 }
2123 /*
71200d45 2124 * Always open in binary mode
14a5cf38
JH		 2125 */
2126 oflags |= O_BINARY;
2127 if (*mode || oflags == -1) {
2128 SETERRNO(EINVAL, LIB$_INVARG);
2129 oflags = -1;
2130 }
2131 return oflags;
9e353e3b
NIS		 2132}
2133
2134IV
2135PerlIOUnix_fileno(PerlIO *f)
2136{
14a5cf38 2137 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2138}
2139
4b803d04 2140IV
e3f3bf95 2141PerlIOUnix_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2142{
14a5cf38 2143 IV code = PerlIOBase_pushed(f, mode, arg);
93a8090d 2144 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
14a5cf38 2145 if (*PerlIONext(f)) {
14a5cf38
JH		 2146 s->fd = PerlIO_fileno(PerlIONext(f));
2147 /*
71200d45 2148 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2149 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2150 * Should the value on NULL mode be 0 or -1?
14a5cf38
JH		 2151 */
2152 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2153 }
2154 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2155 return code;
4b803d04
NIS		 2156}
2157
9e353e3b 2158PerlIO *
14a5cf38
JH		 2159PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2160 IV n, const char *mode, int fd, int imode,
2161 int perm, PerlIO *f, int narg, SV **args)
2162{
2163 if (f) {
2164 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2165 (*PerlIOBase(f)->tab->Close) (f);
2166 }
2167 if (narg > 0) {
2168 char *path = SvPV_nolen(*args);
2169 if (*mode == '#')
2170 mode++;
2171 else {
2172 imode = PerlIOUnix_oflags(mode);
2173 perm = 0666;
2174 }
2175 if (imode != -1) {
2176 fd = PerlLIO_open3(path, imode, perm);
2177 }
2178 }
2179 if (fd >= 0) {
2180 PerlIOUnix *s;
2181 if (*mode == 'I')
2182 mode++;
2183 if (!f) {
2184 f = PerlIO_allocate(aTHX);
2185 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2186 PerlIOUnix);
2187 }
2188 else
2189 s = PerlIOSelf(f, PerlIOUnix);
2190 s->fd = fd;
2191 s->oflags = imode;
2192 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
93a8090d 2193 PerlIOUnix_refcnt_inc(fd);
14a5cf38
JH		 2194 return f;
2195 }
2196 else {
2197 if (f) {
2198 /*
71200d45 2199 * FIXME: pop layers ???
14a5cf38
JH		 2200 */
2201 }
2202 return NULL;
2203 }
9e353e3b
NIS		 2204}
2205
71200d45 2206PerlIO *
8cf8f3d1 2207PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45
NIS		 2208{
2209 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d
NIS		 2210 int fd = os->fd;
2211 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
71200d45
NIS		 2212 f = PerlIOBase_dup(aTHX_ f, o, param);
2213 if (f) {
2214 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2215 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2216 s->fd = fd;
93a8090d 2217 PerlIOUnix_refcnt_inc(fd);
71200d45
NIS		 2218 return f;
2219 }
71200d45
NIS		 2220 }
2221 return NULL;
2222}
2223
2224
9e353e3b
NIS		 2225SSize_t
2226PerlIOUnix_read(PerlIO *f, void *vbuf, Size_t count)
2227{
14a5cf38
JH		 2228 dTHX;
2229 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2230 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2231 return 0;
2232 while (1) {
2233 SSize_t len = PerlLIO_read(fd, vbuf, count);
2234 if (len >= 0 || errno != EINTR) {
2235 if (len < 0)
2236 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2237 else if (len == 0 && count != 0)
2238 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2239 return len;
2240 }
2241 PERL_ASYNC_CHECK();
2242 }
9e353e3b
NIS		 2243}
2244
2245SSize_t
2246PerlIOUnix_write(PerlIO *f, const void *vbuf, Size_t count)
2247{
14a5cf38
JH		 2248 dTHX;
2249 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2250 while (1) {
2251 SSize_t len = PerlLIO_write(fd, vbuf, count);
2252 if (len >= 0 || errno != EINTR) {
2253 if (len < 0)
2254 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2255 return len;
2256 }
2257 PERL_ASYNC_CHECK();
06da4f11 2258 }
9e353e3b
NIS		 2259}
2260
2261IV
2262PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
2263{
14a5cf38
JH		 2264 dSYS;
2265 Off_t new =
2266 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2267 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2268 return (new == (Off_t) - 1) ? -1 : 0;
9e353e3b
NIS		 2269}
2270
2271Off_t
2272PerlIOUnix_tell(PerlIO *f)
2273{
14a5cf38
JH		 2274 dSYS;
2275 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2276}
2277
71200d45 2278
9e353e3b
NIS		 2279IV
2280PerlIOUnix_close(PerlIO *f)
2281{
14a5cf38
JH		 2282 dTHX;
2283 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2284 int code = 0;
168d5872
NIS		 2285 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2286 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS		 2287 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2288 return 0;
2289 }
93a8090d
NIS		 2290 }
2291 else {
2292 SETERRNO(EBADF,SS$_IVCHAN);
2293 return -1;
2294 }
14a5cf38
JH		 2295 while (PerlLIO_close(fd) != 0) {
2296 if (errno != EINTR) {
2297 code = -1;
2298 break;
2299 }
2300 PERL_ASYNC_CHECK();
2301 }
2302 if (code == 0) {
2303 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2304 }
2305 return code;
9e353e3b
NIS		 2306}
2307
2308PerlIO_funcs PerlIO_unix = {
14a5cf38
JH		 2309 "unix",
2310 sizeof(PerlIOUnix),
2311 PERLIO_K_RAW,
2312 PerlIOUnix_pushed,
2313 PerlIOBase_noop_ok,
2314 PerlIOUnix_open,
2315 NULL,
2316 PerlIOUnix_fileno,
71200d45 2317 PerlIOUnix_dup,
14a5cf38
JH		 2318 PerlIOUnix_read,
2319 PerlIOBase_unread,
2320 PerlIOUnix_write,
2321 PerlIOUnix_seek,
2322 PerlIOUnix_tell,
2323 PerlIOUnix_close,
2324 PerlIOBase_noop_ok, /* flush */
2325 PerlIOBase_noop_fail, /* fill */
2326 PerlIOBase_eof,
2327 PerlIOBase_error,
2328 PerlIOBase_clearerr,
2329 PerlIOBase_setlinebuf,
2330 NULL, /* get_base */
2331 NULL, /* get_bufsiz */
2332 NULL, /* get_ptr */
2333 NULL, /* get_cnt */
2334 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2335};
2336
2337/*--------------------------------------------------------------------------------------*/
14a5cf38 2338/*
71200d45 2339 * stdio as a layer
14a5cf38 2340 */
9e353e3b 2341
14a5cf38
JH		 2342typedef struct {
2343 struct _PerlIO base;
2344 FILE *stdio; /* The stream */
9e353e3b
NIS		 2345} PerlIOStdio;
2346
2347IV
2348PerlIOStdio_fileno(PerlIO *f)
2349{
14a5cf38
JH		 2350 dSYS;
2351 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2352}
2353
766a733e 2354char *
14a5cf38
JH		 2355PerlIOStdio_mode(const char *mode, char *tmode)
2356{
2357 char *ret = tmode;
2358 while (*mode) {
2359 *tmode++ = *mode++;
2360 }
2361 if (O_BINARY != O_TEXT) {
2362 *tmode++ = 'b';
2363 }
2364 *tmode = '\0';
2365 return ret;
2366}
2367
2368/*
71200d45 2369 * This isn't used yet ...
14a5cf38 2370 */
4b803d04 2371IV
e3f3bf95 2372PerlIOStdio_pushed(PerlIO *f, const char *mode, SV *arg)
4b803d04 2373{
14a5cf38
JH		 2374 if (*PerlIONext(f)) {
2375 dSYS;
2376 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2377 char tmode[8];
2378 FILE *stdio =
2379 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2380 PerlIOStdio_mode(mode, tmode));
2381 if (stdio)
2382 s->stdio = stdio;
2383 else
2384 return -1;
2385 }
2386 return PerlIOBase_pushed(f, mode, arg);
4b803d04
NIS		 2387}
2388
9e353e3b
NIS		 2389#undef PerlIO_importFILE
2390PerlIO *
2391PerlIO_importFILE(FILE *stdio, int fl)
2392{
14a5cf38
JH		 2393 dTHX;
2394 PerlIO *f = NULL;
2395 if (stdio) {
2396 PerlIOStdio *s =
2397 PerlIOSelf(PerlIO_push
2398 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2399 "r+", Nullsv), PerlIOStdio);
2400 s->stdio = stdio;
2401 }
2402 return f;
9e353e3b
NIS		 2403}
2404
2405PerlIO *
14a5cf38
JH		 2406PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2407 IV n, const char *mode, int fd, int imode,
2408 int perm, PerlIO *f, int narg, SV **args)
2409{
2410 char tmode[8];
2411 if (f) {
2412 char *path = SvPV_nolen(*args);
2413 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS		 2414 FILE *stdio;
2415 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2416 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH		 2417 s->stdio);
2418 if (!s->stdio)
2419 return NULL;
2420 s->stdio = stdio;
1751d015 2421 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2422 return f;
2423 }
2424 else {
2425 if (narg > 0) {
2426 char *path = SvPV_nolen(*args);
2427 if (*mode == '#') {
2428 mode++;
2429 fd = PerlLIO_open3(path, imode, perm);
2430 }
2431 else {
2432 FILE *stdio = PerlSIO_fopen(path, mode);
2433 if (stdio) {
2434 PerlIOStdio *s =
2435 PerlIOSelf(PerlIO_push
2436 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2437 (mode = PerlIOStdio_mode(mode, tmode)),
2438 PerlIOArg),
2439 PerlIOStdio);
2440 s->stdio = stdio;
1751d015 2441 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2442 }
2443 return f;
2444 }
2445 }
2446 if (fd >= 0) {
2447 FILE *stdio = NULL;
2448 int init = 0;
2449 if (*mode == 'I') {
2450 init = 1;
2451 mode++;
2452 }
2453 if (init) {
2454 switch (fd) {
2455 case 0:
2456 stdio = PerlSIO_stdin;
2457 break;
2458 case 1:
2459 stdio = PerlSIO_stdout;
2460 break;
2461 case 2:
2462 stdio = PerlSIO_stderr;
2463 break;
2464 }
2465 }
2466 else {
2467 stdio = PerlSIO_fdopen(fd, mode =
2468 PerlIOStdio_mode(mode, tmode));
2469 }
2470 if (stdio) {
2471 PerlIOStdio *s =
2472 PerlIOSelf(PerlIO_push
2473 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2474 mode, PerlIOArg), PerlIOStdio);
2475 s->stdio = stdio;
1751d015 2476 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH		 2477 return f;
2478 }
2479 }
2480 }
ee518936 2481 return NULL;
9e353e3b
NIS		 2482}
2483
1751d015
NIS		 2484PerlIO *
2485PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
2486{
2487 /* This assumes no layers underneath - which is what
2488 happens, but is not how I remember it. NI-S 2001/10/16
2489 */
694c95cf
JH		 2490 if ((f = PerlIOBase_dup(aTHX_ f, o, param))) {
2491 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2492 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2493 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS		 2494 }
2495 return f;
2496}
2497
2498IV
2499PerlIOStdio_close(PerlIO *f)
2500{
2501 dSYS;
2502#ifdef SOCKS5_VERSION_NAME
2503 int optval;
2504 Sock_size_t optlen = sizeof(int);
2505#endif
2506 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2507 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
694c95cf
JH		 2508 /* Do not close it but do flush any buffers */
2509 PerlIO_flush(f);
1751d015
NIS		 2510 return 0;
2511 }
2512 return (
2513#ifdef SOCKS5_VERSION_NAME
2514 (getsockopt
2515 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2516 &optlen) <
2517 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2518#else
2519 PerlSIO_fclose(stdio)
2520#endif
2521 );
2522
2523}
2524
2525
2526
9e353e3b
NIS		 2527SSize_t
2528PerlIOStdio_read(PerlIO *f, void *vbuf, Size_t count)
2529{
14a5cf38
JH		 2530 dSYS;
2531 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2532 SSize_t got = 0;
2533 if (count == 1) {
2534 STDCHAR *buf = (STDCHAR *) vbuf;
2535 /*
2536 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
71200d45 2537 * stdio does not do that for fread()
14a5cf38
JH		 2538 */
2539 int ch = PerlSIO_fgetc(s);
2540 if (ch != EOF) {
2541 *buf = ch;
2542 got = 1;
2543 }
2544 }
2545 else
2546 got = PerlSIO_fread(vbuf, 1, count, s);
2547 return got;
9e353e3b
NIS		 2548}
2549
2550SSize_t
2551PerlIOStdio_unread(PerlIO *f, const void *vbuf, Size_t count)
2552{
14a5cf38
JH		 2553 dSYS;
2554 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2555 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2556 SSize_t unread = 0;
2557 while (count > 0) {
2558 int ch = *buf-- & 0xff;
2559 if (PerlSIO_ungetc(ch, s) != ch)
2560 break;
2561 unread++;
2562 count--;
2563 }
2564 return unread;
9e353e3b
NIS		 2565}
2566
2567SSize_t
2568PerlIOStdio_write(PerlIO *f, const void *vbuf, Size_t count)
2569{
14a5cf38
JH		 2570 dSYS;
2571 return PerlSIO_fwrite(vbuf, 1, count,
2572 PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2573}
2574
2575IV
2576PerlIOStdio_seek(PerlIO *f, Off_t offset, int whence)
2577{
14a5cf38
JH		 2578 dSYS;
2579 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2580 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 2581}
2582
2583Off_t
2584PerlIOStdio_tell(PerlIO *f)
2585{
14a5cf38
JH		 2586 dSYS;
2587 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2588 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 2589}
2590
2591IV
9e353e3b
NIS		 2592PerlIOStdio_flush(PerlIO *f)
2593{
14a5cf38
JH		 2594 dSYS;
2595 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2596 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2597 return PerlSIO_fflush(stdio);
2598 }
2599 else {
88b61e10 2600#if 0
14a5cf38
JH		 2601 /*
2602 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 2603 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 2604 * design is to do _this_ but not have layer above flush this
71200d45 2605 * layer read-to-read
14a5cf38
JH		 2606 */
2607 /*
71200d45 2608 * Not writeable - sync by attempting a seek
14a5cf38
JH		 2609 */
2610 int err = errno;
2611 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2612 errno = err;
88b61e10 2613#endif
14a5cf38
JH		 2614 }
2615 return 0;
9e353e3b
NIS		 2616}
2617
2618IV
06da4f11
NIS		 2619PerlIOStdio_fill(PerlIO *f)
2620{
14a5cf38
JH		 2621 dSYS;
2622 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2623 int c;
2624 /*
71200d45 2625 * fflush()ing read-only streams can cause trouble on some stdio-s
14a5cf38
JH		 2626 */
2627 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2628 if (PerlSIO_fflush(stdio) != 0)
2629 return EOF;
2630 }
2631 c = PerlSIO_fgetc(stdio);
2632 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2633 return EOF;
2634 return 0;
06da4f11
NIS		 2635}
2636
2637IV
9e353e3b
NIS		 2638PerlIOStdio_eof(PerlIO *f)
2639{
14a5cf38
JH		 2640 dSYS;
2641 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2642}
2643
2644IV
2645PerlIOStdio_error(PerlIO *f)
2646{
14a5cf38
JH		 2647 dSYS;
2648 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2649}
2650
2651void
2652PerlIOStdio_clearerr(PerlIO *f)
2653{
14a5cf38
JH		 2654 dSYS;
2655 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 2656}
2657
2658void
2659PerlIOStdio_setlinebuf(PerlIO *f)
2660{
14a5cf38 2661 dSYS;
9e353e3b 2662#ifdef HAS_SETLINEBUF
14a5cf38 2663 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 2664#else
14a5cf38 2665 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS		 2666#endif
2667}
2668
2669#ifdef FILE_base
2670STDCHAR *
2671PerlIOStdio_get_base(PerlIO *f)
2672{
14a5cf38
JH		 2673 dSYS;
2674 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2675 return PerlSIO_get_base(stdio);
9e353e3b
NIS		 2676}
2677
2678Size_t
2679PerlIOStdio_get_bufsiz(PerlIO *f)
2680{
14a5cf38
JH		 2681 dSYS;
2682 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2683 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 2684}
2685#endif
2686
2687#ifdef USE_STDIO_PTR
2688STDCHAR *
2689PerlIOStdio_get_ptr(PerlIO *f)
2690{
14a5cf38
JH		 2691 dSYS;
2692 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2693 return PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 2694}
2695
2696SSize_t
2697PerlIOStdio_get_cnt(PerlIO *f)
2698{
14a5cf38
JH		 2699 dSYS;
2700 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2701 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 2702}
2703
2704void
14a5cf38 2705PerlIOStdio_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 2706{
14a5cf38
JH		 2707 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2708 dSYS;
2709 if (ptr != NULL) {
9e353e3b 2710#ifdef STDIO_PTR_LVALUE
14a5cf38 2711 PerlSIO_set_ptr(stdio, ptr);
9e353e3b 2712#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38
JH		 2713 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2714 dTHX;
2715 assert(PerlSIO_get_cnt(stdio) == (cnt));
2716 }
9e353e3b
NIS		 2717#endif
2718#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 2719 /*
71200d45 2720 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 2721 */
2722 return;
9e353e3b 2723#endif
14a5cf38
JH		 2724#else /* STDIO_PTR_LVALUE */
2725 PerlProc_abort();
2726#endif /* STDIO_PTR_LVALUE */
2727 }
2728 /*
71200d45 2729 * Now (or only) set cnt
14a5cf38 2730 */
9e353e3b 2731#ifdef STDIO_CNT_LVALUE
14a5cf38
JH		 2732 PerlSIO_set_cnt(stdio, cnt);
2733#else /* STDIO_CNT_LVALUE */
9e353e3b 2734#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 2735 PerlSIO_set_ptr(stdio,
2736 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2737 cnt));
2738#else /* STDIO_PTR_LVAL_SETS_CNT */
2739 PerlProc_abort();
2740#endif /* STDIO_PTR_LVAL_SETS_CNT */
2741#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 2742}
2743
2744#endif
2745
2746PerlIO_funcs PerlIO_stdio = {
14a5cf38
JH		 2747 "stdio",
2748 sizeof(PerlIOStdio),
2749 PERLIO_K_BUFFERED,
2750 PerlIOBase_pushed,
2751 PerlIOBase_noop_ok,
2752 PerlIOStdio_open,
2753 NULL,
2754 PerlIOStdio_fileno,
71200d45 2755 PerlIOStdio_dup,
14a5cf38
JH		 2756 PerlIOStdio_read,
2757 PerlIOStdio_unread,
2758 PerlIOStdio_write,
2759 PerlIOStdio_seek,
2760 PerlIOStdio_tell,
2761 PerlIOStdio_close,
2762 PerlIOStdio_flush,
2763 PerlIOStdio_fill,
2764 PerlIOStdio_eof,
2765 PerlIOStdio_error,
2766 PerlIOStdio_clearerr,
2767 PerlIOStdio_setlinebuf,
9e353e3b 2768#ifdef FILE_base
14a5cf38
JH		 2769 PerlIOStdio_get_base,
2770 PerlIOStdio_get_bufsiz,
9e353e3b 2771#else
14a5cf38
JH		 2772 NULL,
2773 NULL,
9e353e3b
NIS		 2774#endif
2775#ifdef USE_STDIO_PTR
14a5cf38
JH		 2776 PerlIOStdio_get_ptr,
2777 PerlIOStdio_get_cnt,
0eb1d8a4 2778#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
14a5cf38
JH		 2779 PerlIOStdio_set_ptrcnt
2780#else /* STDIO_PTR_LVALUE */
2781 NULL
2782#endif /* STDIO_PTR_LVALUE */
2783#else /* USE_STDIO_PTR */
2784 NULL,
2785 NULL,
2786 NULL
2787#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 2788};
2789
2790#undef PerlIO_exportFILE
2791FILE *
2792PerlIO_exportFILE(PerlIO *f, int fl)
2793{
14a5cf38
JH		 2794 FILE *stdio;
2795 PerlIO_flush(f);
2796 stdio = fdopen(PerlIO_fileno(f), "r+");
2797 if (stdio) {
2798 dTHX;
2799 PerlIOStdio *s =
2800 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2801 PerlIOStdio);
2802 s->stdio = stdio;
2803 }
2804 return stdio;
9e353e3b
NIS		 2805}
2806
2807#undef PerlIO_findFILE
2808FILE *
2809PerlIO_findFILE(PerlIO *f)
2810{
14a5cf38
JH		 2811 PerlIOl *l = *f;
2812 while (l) {
2813 if (l->tab == &PerlIO_stdio) {
2814 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2815 return s->stdio;
2816 }
2817 l = *PerlIONext(&l);
f7e7eb72 2818 }
14a5cf38 2819 return PerlIO_exportFILE(f, 0);
9e353e3b
NIS		 2820}
2821
2822#undef PerlIO_releaseFILE
2823void
2824PerlIO_releaseFILE(PerlIO *p, FILE *f)
2825{
2826}
2827
2828/*--------------------------------------------------------------------------------------*/
14a5cf38 2829/*
71200d45 2830 * perlio buffer layer
14a5cf38 2831 */
9e353e3b 2832
5e2ab84b 2833IV
e3f3bf95 2834PerlIOBuf_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 2835{
14a5cf38
JH		 2836 dSYS;
2837 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2838 int fd = PerlIO_fileno(f);
2839 Off_t posn;
2840 if (fd >= 0 && PerlLIO_isatty(fd)) {
2841 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2842 }
2843 posn = PerlIO_tell(PerlIONext(f));
2844 if (posn != (Off_t) - 1) {
2845 b->posn = posn;
2846 }
2847 return PerlIOBase_pushed(f, mode, arg);
5e2ab84b
NIS		 2848}
2849
9e353e3b 2850PerlIO *
14a5cf38
JH		 2851PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2852 IV n, const char *mode, int fd, int imode, int perm,
2853 PerlIO *f, int narg, SV **args)
2854{
2855 if (f) {
2856 PerlIO *next = PerlIONext(f);
2857 PerlIO_funcs *tab =
2858 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2859 next =
2860 (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2861 next, narg, args);
2862 if (!next
2863 || (*PerlIOBase(f)->tab->Pushed) (f, mode, PerlIOArg) != 0) {
2864 return NULL;
2865 }
2866 }
2867 else {
2868 PerlIO_funcs *tab =
2869 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2870 int init = 0;
2871 if (*mode == 'I') {
2872 init = 1;
2873 /*
71200d45 2874 * mode++;
14a5cf38
JH		 2875 */
2876 }
2877 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2878 NULL, narg, args);
2879 if (f) {
b26b1ab5
NC		 2880 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2881 /*
2882 * if push fails during open, open fails. close will pop us.
2883 */
2884 PerlIO_close (f);
2885 return NULL;
2886 } else {
2887 fd = PerlIO_fileno(f);
4804698d 2888#if (O_BINARY != O_TEXT) && !defined(__BEOS__)
14a5cf38 2889 /*
b26b1ab5 2890 * do something about failing setmode()? --jhi
14a5cf38 2891 */
b26b1ab5
NC		 2892 PerlLIO_setmode(fd, O_BINARY);
2893#endif
2894 if (init && fd == 2) {
2895 /*
2896 * Initial stderr is unbuffered
2897 */
2898 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2899 }
14a5cf38
JH		 2900 }
2901 }
ee518936 2902 }
14a5cf38 2903 return f;
9e353e3b
NIS		 2904}
2905
14a5cf38
JH		 2906/*
2907 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 2908 * read or write state
14a5cf38 2909 */
9e353e3b
NIS		 2910IV
2911PerlIOBuf_flush(PerlIO *f)
6f9d8c32 2912{
14a5cf38
JH		 2913 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2914 int code = 0;
2915 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2916 /*
71200d45 2917 * write() the buffer
14a5cf38
JH		 2918 */
2919 STDCHAR *buf = b->buf;
2920 STDCHAR *p = buf;
2921 PerlIO *n = PerlIONext(f);
2922 while (p < b->ptr) {
2923 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2924 if (count > 0) {
2925 p += count;
2926 }
2927 else if (count < 0 || PerlIO_error(n)) {
2928 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2929 code = -1;
2930 break;
2931 }
2932 }
2933 b->posn += (p - buf);
2934 }
2935 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2936 STDCHAR *buf = PerlIO_get_base(f);
2937 /*
71200d45 2938 * Note position change
14a5cf38
JH		 2939 */
2940 b->posn += (b->ptr - buf);
2941 if (b->ptr < b->end) {
2942 /*
71200d45 2943 * We did not consume all of it
14a5cf38
JH		 2944 */
2945 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) == 0) {
2946 b->posn = PerlIO_tell(PerlIONext(f));
2947 }
2948 }
2949 }
2950 b->ptr = b->end = b->buf;
2951 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2952 /*
71200d45 2953 * FIXME: Is this right for read case ?
14a5cf38
JH		 2954 */
2955 if (PerlIO_flush(PerlIONext(f)) != 0)
2956 code = -1;
2957 return code;
6f9d8c32
NIS		 2958}
2959
06da4f11
NIS		 2960IV
2961PerlIOBuf_fill(PerlIO *f)
2962{
14a5cf38
JH		 2963 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2964 PerlIO *n = PerlIONext(f);
2965 SSize_t avail;
2966 /*
2967 * FIXME: doing the down-stream flush is a bad idea if it causes
2968 * pre-read data in stdio buffer to be discarded but this is too
2969 * simplistic - as it skips _our_ hosekeeping and breaks tell tests.
71200d45 2970 * if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { }
14a5cf38
JH		 2971 */
2972 if (PerlIO_flush(f) != 0)
2973 return -1;
2974 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2975 PerlIOBase_flush_linebuf();
2976
2977 if (!b->buf)
2978 PerlIO_get_base(f); /* allocate via vtable */
2979
2980 b->ptr = b->end = b->buf;
2981 if (PerlIO_fast_gets(n)) {
2982 /*
2983 * Layer below is also buffered We do _NOT_ want to call its
2984 * ->Read() because that will loop till it gets what we asked for
2985 * which may hang on a pipe etc. Instead take anything it has to
71200d45 2986 * hand, or ask it to fill _once_.
14a5cf38
JH		 2987 */
2988 avail = PerlIO_get_cnt(n);
2989 if (avail <= 0) {
2990 avail = PerlIO_fill(n);
2991 if (avail == 0)
2992 avail = PerlIO_get_cnt(n);
2993 else {
2994 if (!PerlIO_error(n) && PerlIO_eof(n))
2995 avail = 0;
2996 }
2997 }
2998 if (avail > 0) {
2999 STDCHAR *ptr = PerlIO_get_ptr(n);
3000 SSize_t cnt = avail;
3001 if (avail > b->bufsiz)
3002 avail = b->bufsiz;
3003 Copy(ptr, b->buf, avail, STDCHAR);
3004 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3005 }
3006 }
3007 else {
3008 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3009 }
3010 if (avail <= 0) {
3011 if (avail == 0)
3012 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3013 else
3014 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3015 return -1;
3016 }
3017 b->end = b->buf + avail;
3018 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3019 return 0;
06da4f11
NIS		 3020}
3021
6f9d8c32 3022SSize_t
9e353e3b 3023PerlIOBuf_read(PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 3024{
14a5cf38
JH		 3025 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3026 if (f) {
3027 if (!b->ptr)
3028 PerlIO_get_base(f);
3029 return PerlIOBase_read(f, vbuf, count);
3030 }
3031 return 0;
6f9d8c32
NIS		 3032}
3033
9e353e3b
NIS		 3034SSize_t
3035PerlIOBuf_unread(PerlIO *f, const void *vbuf, Size_t count)
760ac839 3036{
14a5cf38
JH		 3037 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3038 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3039 SSize_t unread = 0;
3040 SSize_t avail;
3041 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3042 PerlIO_flush(f);
3043 if (!b->buf)
3044 PerlIO_get_base(f);
3045 if (b->buf) {
3046 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3047 /*
3048 * Buffer is already a read buffer, we can overwrite any chars
71200d45 3049 * which have been read back to buffer start
14a5cf38
JH		 3050 */
3051 avail = (b->ptr - b->buf);
3052 }
3053 else {
3054 /*
3055 * Buffer is idle, set it up so whole buffer is available for
71200d45 3056 * unread
14a5cf38
JH		 3057 */
3058 avail = b->bufsiz;
3059 b->end = b->buf + avail;
3060 b->ptr = b->end;
3061 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3062 /*
71200d45 3063 * Buffer extends _back_ from where we are now
14a5cf38
JH		 3064 */
3065 b->posn -= b->bufsiz;
3066 }
3067 if (avail > (SSize_t) count) {
3068 /*
71200d45 3069 * If we have space for more than count, just move count
14a5cf38
JH		 3070 */
3071 avail = count;
3072 }
3073 if (avail > 0) {
3074 b->ptr -= avail;
3075 buf -= avail;
3076 /*
3077 * In simple stdio-like ungetc() case chars will be already
71200d45 3078 * there
14a5cf38
JH		 3079 */
3080 if (buf != b->ptr) {
3081 Copy(buf, b->ptr, avail, STDCHAR);
3082 }
3083 count -= avail;
3084 unread += avail;
3085 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3086 }
3087 }
3088 return unread;
760ac839
LW		 3089}
3090
9e353e3b
NIS		 3091SSize_t
3092PerlIOBuf_write(PerlIO *f, const void *vbuf, Size_t count)
760ac839 3093{
14a5cf38
JH		 3094 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3095 const STDCHAR *buf = (const STDCHAR *) vbuf;
3096 Size_t written = 0;
3097 if (!b->buf)
3098 PerlIO_get_base(f);
3099 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3100 return 0;
3101 while (count > 0) {
3102 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3103 if ((SSize_t) count < avail)
3104 avail = count;
3105 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3106 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3107 while (avail > 0) {
3108 int ch = *buf++;
3109 *(b->ptr)++ = ch;
3110 count--;
3111 avail--;
3112 written++;
3113 if (ch == '\n') {
3114 PerlIO_flush(f);
3115 break;
3116 }
3117 }
3118 }
3119 else {
3120 if (avail) {
3121 Copy(buf, b->ptr, avail, STDCHAR);
3122 count -= avail;
3123 buf += avail;
3124 written += avail;
3125 b->ptr += avail;
3126 }
3127 }
3128 if (b->ptr >= (b->buf + b->bufsiz))
3129 PerlIO_flush(f);
3130 }
3131 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3132 PerlIO_flush(f);
3133 return written;
9e353e3b
NIS		 3134}
3135
3136IV
3137PerlIOBuf_seek(PerlIO *f, Off_t offset, int whence)
3138{
14a5cf38
JH		 3139 IV code;
3140 if ((code = PerlIO_flush(f)) == 0) {
3141 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3142 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3143 code = PerlIO_seek(PerlIONext(f), offset, whence);
3144 if (code == 0) {
3145 b->posn = PerlIO_tell(PerlIONext(f));
3146 }
9e353e3b 3147 }
14a5cf38 3148 return code;
9e353e3b
NIS		 3149}
3150
3151Off_t
3152PerlIOBuf_tell(PerlIO *f)
3153{
14a5cf38
JH		 3154 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3155 /*
71200d45 3156 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 3157 */
3158 Off_t posn = b->posn;
3159 if (b->buf) {
3160 /*
71200d45 3161 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 3162 */
3163 posn += (b->ptr - b->buf);
3164 }
3165 return posn;
9e353e3b
NIS		 3166}
3167
3168IV
3169PerlIOBuf_close(PerlIO *f)
3170{
14a5cf38
JH		 3171 IV code = PerlIOBase_close(f);
3172 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3173 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3174 Safefree(b->buf);
14a5cf38
JH		 3175 }
3176 b->buf = NULL;
3177 b->ptr = b->end = b->buf;
3178 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3179 return code;
760ac839
LW		 3180}
3181
9e353e3b
NIS		 3182STDCHAR *
3183PerlIOBuf_get_ptr(PerlIO *f)
3184{
14a5cf38
JH		 3185 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3186 if (!b->buf)
3187 PerlIO_get_base(f);
3188 return b->ptr;
9e353e3b
NIS		 3189}
3190
05d1247b 3191SSize_t
9e353e3b
NIS		 3192PerlIOBuf_get_cnt(PerlIO *f)
3193{
14a5cf38
JH		 3194 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3195 if (!b->buf)
3196 PerlIO_get_base(f);
3197 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3198 return (b->end - b->ptr);
3199 return 0;
9e353e3b
NIS		 3200}
3201
3202STDCHAR *
3203PerlIOBuf_get_base(PerlIO *f)
3204{
14a5cf38
JH		 3205 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3206 if (!b->buf) {
3207 if (!b->bufsiz)
3208 b->bufsiz = 4096;
a1ea730d 3209 b->buf =
7fcdafbd 3210 Newz('B',b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 3211 if (!b->buf) {
3212 b->buf = (STDCHAR *) & b->oneword;
3213 b->bufsiz = sizeof(b->oneword);
3214 }
3215 b->ptr = b->buf;
3216 b->end = b->ptr;
06da4f11 3217 }
14a5cf38 3218 return b->buf;
9e353e3b
NIS		 3219}
3220
3221Size_t
3222PerlIOBuf_bufsiz(PerlIO *f)
3223{
14a5cf38
JH		 3224 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3225 if (!b->buf)
3226 PerlIO_get_base(f);
3227 return (b->end - b->buf);
9e353e3b
NIS		 3228}
3229
3230void
14a5cf38 3231PerlIOBuf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3232{
14a5cf38
JH		 3233 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3234 if (!b->buf)
3235 PerlIO_get_base(f);
3236 b->ptr = ptr;
3237 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3238 dTHX;
3239 assert(PerlIO_get_cnt(f) == cnt);
3240 assert(b->ptr >= b->buf);
3241 }
3242 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 3243}
3244
71200d45 3245PerlIO *
8cf8f3d1 3246PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3247{
a8fc9800 3248 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3249}
3250
3251
3252
9e353e3b 3253PerlIO_funcs PerlIO_perlio = {
14a5cf38
JH		 3254 "perlio",
3255 sizeof(PerlIOBuf),
3256 PERLIO_K_BUFFERED,
3257 PerlIOBuf_pushed,
3258 PerlIOBase_noop_ok,
3259 PerlIOBuf_open,
3260 NULL,
3261 PerlIOBase_fileno,
71200d45 3262 PerlIOBuf_dup,
14a5cf38
JH		 3263 PerlIOBuf_read,
3264 PerlIOBuf_unread,
3265 PerlIOBuf_write,
3266 PerlIOBuf_seek,
3267 PerlIOBuf_tell,
3268 PerlIOBuf_close,
3269 PerlIOBuf_flush,
3270 PerlIOBuf_fill,
3271 PerlIOBase_eof,
3272 PerlIOBase_error,
3273 PerlIOBase_clearerr,
3274 PerlIOBase_setlinebuf,
3275 PerlIOBuf_get_base,
3276 PerlIOBuf_bufsiz,
3277 PerlIOBuf_get_ptr,
3278 PerlIOBuf_get_cnt,
3279 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 3280};
3281
66ecd56b 3282/*--------------------------------------------------------------------------------------*/
14a5cf38 3283/*
71200d45 3284 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 3285 */
5e2ab84b
NIS		 3286
3287IV
3288PerlIOPending_fill(PerlIO *f)
3289{
14a5cf38 3290 /*
71200d45 3291 * Should never happen
14a5cf38
JH		 3292 */
3293 PerlIO_flush(f);
3294 return 0;
5e2ab84b
NIS		 3295}
3296
3297IV
3298PerlIOPending_close(PerlIO *f)
3299{
14a5cf38 3300 /*
71200d45 3301 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 3302 */
3303 PerlIO_flush(f);
3304 return PerlIO_close(f);
5e2ab84b
NIS		 3305}
3306
3307IV
3308PerlIOPending_seek(PerlIO *f, Off_t offset, int whence)
3309{
14a5cf38 3310 /*
71200d45 3311 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 3312 */
3313 PerlIO_flush(f);
3314 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 3315}
3316
3317
3318IV
3319PerlIOPending_flush(PerlIO *f)
3320{
14a5cf38
JH		 3321 dTHX;
3322 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3323 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 3324 Safefree(b->buf);
14a5cf38
JH		 3325 b->buf = NULL;
3326 }
3327 PerlIO_pop(aTHX_ f);
3328 return 0;
5e2ab84b
NIS		 3329}
3330
3331void
14a5cf38 3332PerlIOPending_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 3333{
14a5cf38
JH		 3334 if (cnt <= 0) {
3335 PerlIO_flush(f);
3336 }
3337 else {
3338 PerlIOBuf_set_ptrcnt(f, ptr, cnt);
3339 }
5e2ab84b
NIS		 3340}
3341
3342IV
14a5cf38 3343PerlIOPending_pushed(PerlIO *f, const char *mode, SV *arg)
5e2ab84b 3344{
14a5cf38
JH		 3345 IV code = PerlIOBase_pushed(f, mode, arg);
3346 PerlIOl *l = PerlIOBase(f);
3347 /*
71200d45
NIS		 3348 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3349 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 3350 */
3351 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3352 (PerlIOBase(PerlIONext(f))->
3353 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3354 return code;
5e2ab84b
NIS		 3355}
3356
3357SSize_t
3358PerlIOPending_read(PerlIO *f, void *vbuf, Size_t count)
3359{
14a5cf38
JH		 3360 SSize_t avail = PerlIO_get_cnt(f);
3361 SSize_t got = 0;
3362 if (count < avail)
3363 avail = count;
3364 if (avail > 0)
3365 got = PerlIOBuf_read(f, vbuf, avail);
3366 if (got >= 0 && got < count) {
3367 SSize_t more =
3368 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3369 if (more >= 0 || got == 0)
3370 got += more;
3371 }
3372 return got;
5e2ab84b
NIS		 3373}
3374
5e2ab84b 3375PerlIO_funcs PerlIO_pending = {
14a5cf38
JH		 3376 "pending",
3377 sizeof(PerlIOBuf),
3378 PERLIO_K_BUFFERED,
3379 PerlIOPending_pushed,
3380 PerlIOBase_noop_ok,
3381 NULL,
3382 NULL,
3383 PerlIOBase_fileno,
71200d45 3384 PerlIOBuf_dup,
14a5cf38
JH		 3385 PerlIOPending_read,
3386 PerlIOBuf_unread,
3387 PerlIOBuf_write,
3388 PerlIOPending_seek,
3389 PerlIOBuf_tell,
3390 PerlIOPending_close,
3391 PerlIOPending_flush,
3392 PerlIOPending_fill,
3393 PerlIOBase_eof,
3394 PerlIOBase_error,
3395 PerlIOBase_clearerr,
3396 PerlIOBase_setlinebuf,
3397 PerlIOBuf_get_base,
3398 PerlIOBuf_bufsiz,
3399 PerlIOBuf_get_ptr,
3400 PerlIOBuf_get_cnt,
3401 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 3402};
3403
3404
3405
3406/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 3407/*
3408 * crlf - translation On read translate CR,LF to "\n" we do this by
3409 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 3410 * record of which nl we "lied" about. On write translate "\n" to CR,LF
66ecd56b
NIS		 3411 */
3412
14a5cf38
JH		 3413typedef struct {
3414 PerlIOBuf base; /* PerlIOBuf stuff */
71200d45 3415 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 3416 * buffer */
99efab12
NIS		 3417} PerlIOCrlf;
3418
f5b9d040 3419IV
14a5cf38 3420PerlIOCrlf_pushed(PerlIO *f, const char *mode, SV *arg)
f5b9d040 3421{
14a5cf38
JH		 3422 IV code;
3423 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3424 code = PerlIOBuf_pushed(f, mode, arg);
5e2ab84b 3425#if 0
14a5cf38
JH		 3426 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3427 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3428 PerlIOBase(f)->flags);
5e2ab84b 3429#endif
14a5cf38 3430 return code;
f5b9d040
NIS		 3431}
3432
3433
99efab12
NIS		 3434SSize_t
3435PerlIOCrlf_unread(PerlIO *f, const void *vbuf, Size_t count)
3436{
14a5cf38
JH		 3437 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3438 if (c->nl) {
3439 *(c->nl) = 0xd;
3440 c->nl = NULL;
3441 }
3442 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3443 return PerlIOBuf_unread(f, vbuf, count);
3444 else {
3445 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3446 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3447 SSize_t unread = 0;
3448 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3449 PerlIO_flush(f);
3450 if (!b->buf)
3451 PerlIO_get_base(f);
3452 if (b->buf) {
3453 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3454 b->end = b->ptr = b->buf + b->bufsiz;
3455 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3456 b->posn -= b->bufsiz;
3457 }
3458 while (count > 0 && b->ptr > b->buf) {
3459 int ch = *--buf;
3460 if (ch == '\n') {
3461 if (b->ptr - 2 >= b->buf) {
3462 *--(b->ptr) = 0xa;
3463 *--(b->ptr) = 0xd;
3464 unread++;
3465 count--;
3466 }
3467 else {
3468 buf++;
3469 break;
3470 }
3471 }
3472 else {
3473 *--(b->ptr) = ch;
3474 unread++;
3475 count--;
3476 }
3477 }
3478 }
3479 return unread;
3480 }
99efab12
NIS		 3481}
3482
3483SSize_t
3484PerlIOCrlf_get_cnt(PerlIO *f)
3485{
14a5cf38
JH		 3486 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3487 if (!b->buf)
3488 PerlIO_get_base(f);
3489 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3490 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3491 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && !c->nl) {
3492 STDCHAR *nl = b->ptr;
3493 scan:
3494 while (nl < b->end && *nl != 0xd)
3495 nl++;
3496 if (nl < b->end && *nl == 0xd) {
3497 test:
3498 if (nl + 1 < b->end) {
3499 if (nl[1] == 0xa) {
3500 *nl = '\n';
3501 c->nl = nl;
3502 }
3503 else {
3504 /*
71200d45 3505 * Not CR,LF but just CR
14a5cf38
JH		 3506 */
3507 nl++;
3508 goto scan;
3509 }
3510 }
3511 else {
3512 /*
71200d45 3513 * Blast - found CR as last char in buffer
14a5cf38
JH		 3514 */
3515 if (b->ptr < nl) {
3516 /*
3517 * They may not care, defer work as long as
71200d45 3518 * possible
14a5cf38
JH		 3519 */
3520 return (nl - b->ptr);
3521 }
3522 else {
3523 int code;
3524 b->ptr++; /* say we have read it as far as
3525 * flush() is concerned */
d1be9408 3526 b->buf++; /* Leave space in front of buffer */
14a5cf38
JH		 3527 b->bufsiz--; /* Buffer is thus smaller */
3528 code = PerlIO_fill(f); /* Fetch some more */
3529 b->bufsiz++; /* Restore size for next time */
3530 b->buf--; /* Point at space */
3531 b->ptr = nl = b->buf; /* Which is what we hand
3532 * off */
3533 b->posn--; /* Buffer starts here */
3534 *nl = 0xd; /* Fill in the CR */
3535 if (code == 0)
3536 goto test; /* fill() call worked */
3537 /*
71200d45 3538 * CR at EOF - just fall through
14a5cf38
JH		 3539 */
3540 }
3541 }
3542 }
3543 }
3544 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3545 }
3546 return 0;
99efab12
NIS		 3547}
3548
3549void
14a5cf38
JH		 3550PerlIOCrlf_set_ptrcnt(PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3551{
3552 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3553 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3554 IV flags = PerlIOBase(f)->flags;
3555 if (!b->buf)
3556 PerlIO_get_base(f);
3557 if (!ptr) {
3558 if (c->nl)
3559 ptr = c->nl + 1;
3560 else {
3561 ptr = b->end;
3562 if ((flags & PERLIO_F_CRLF) && ptr > b->buf && ptr[-1] == 0xd)
3563 ptr--;
3564 }
3565 ptr -= cnt;
3566 }
3567 else {
3568 /*
71200d45 3569 * Test code - delete when it works ...
14a5cf38
JH		 3570 */
3571 STDCHAR *chk;
3572 if (c->nl)
3573 chk = c->nl + 1;
3574 else {
3575 chk = b->end;
3576 if ((flags & PERLIO_F_CRLF) && chk > b->buf && chk[-1] == 0xd)
3577 chk--;
3578 }
3579 chk -= cnt;
3580
3581 if (ptr != chk) {
3582 dTHX;
3583 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3584 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3585 b->end, cnt);
3586 }
3587 }
3588 if (c->nl) {
3589 if (ptr > c->nl) {
3590 /*
71200d45 3591 * They have taken what we lied about
14a5cf38
JH		 3592 */
3593 *(c->nl) = 0xd;
3594 c->nl = NULL;
3595 ptr++;
3596 }
3597 }
3598 b->ptr = ptr;
3599 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 3600}
3601
3602SSize_t
3603PerlIOCrlf_write(PerlIO *f, const void *vbuf, Size_t count)
3604{
14a5cf38
JH		 3605 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3606 return PerlIOBuf_write(f, vbuf, count);
3607 else {
3608 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3609 const STDCHAR *buf = (const STDCHAR *) vbuf;
3610 const STDCHAR *ebuf = buf + count;
3611 if (!b->buf)
3612 PerlIO_get_base(f);
3613 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3614 return 0;
3615 while (buf < ebuf) {
3616 STDCHAR *eptr = b->buf + b->bufsiz;
3617 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3618 while (buf < ebuf && b->ptr < eptr) {
3619 if (*buf == '\n') {
3620 if ((b->ptr + 2) > eptr) {
3621 /*
71200d45 3622 * Not room for both
14a5cf38
JH		 3623 */
3624 PerlIO_flush(f);
3625 break;
3626 }
3627 else {
3628 *(b->ptr)++ = 0xd; /* CR */
3629 *(b->ptr)++ = 0xa; /* LF */
3630 buf++;
3631 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3632 PerlIO_flush(f);
3633 break;
3634 }
3635 }
3636 }
3637 else {
3638 int ch = *buf++;
3639 *(b->ptr)++ = ch;
3640 }
3641 if (b->ptr >= eptr) {
3642 PerlIO_flush(f);
3643 break;
3644 }
3645 }
3646 }
3647 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3648 PerlIO_flush(f);
3649 return (buf - (STDCHAR *) vbuf);
3650 }
99efab12
NIS		 3651}
3652
3653IV
3654PerlIOCrlf_flush(PerlIO *f)
3655{
14a5cf38
JH		 3656 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3657 if (c->nl) {
3658 *(c->nl) = 0xd;
3659 c->nl = NULL;
3660 }
3661 return PerlIOBuf_flush(f);
99efab12
NIS		 3662}
3663
66ecd56b 3664PerlIO_funcs PerlIO_crlf = {
14a5cf38
JH		 3665 "crlf",
3666 sizeof(PerlIOCrlf),
3667 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3668 PerlIOCrlf_pushed,
3669 PerlIOBase_noop_ok, /* popped */
3670 PerlIOBuf_open,
3671 NULL,
3672 PerlIOBase_fileno,
71200d45 3673 PerlIOBuf_dup,
14a5cf38
JH		 3674 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3675 * ... */
3676 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3677 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3678 PerlIOBuf_seek,
3679 PerlIOBuf_tell,
3680 PerlIOBuf_close,
3681 PerlIOCrlf_flush,
3682 PerlIOBuf_fill,
3683 PerlIOBase_eof,
3684 PerlIOBase_error,
3685 PerlIOBase_clearerr,
3686 PerlIOBase_setlinebuf,
3687 PerlIOBuf_get_base,
3688 PerlIOBuf_bufsiz,
3689 PerlIOBuf_get_ptr,
3690 PerlIOCrlf_get_cnt,
3691 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 3692};
3693
06da4f11
NIS		 3694#ifdef HAS_MMAP
3695/*--------------------------------------------------------------------------------------*/
14a5cf38 3696/*
71200d45 3697 * mmap as "buffer" layer
14a5cf38 3698 */
06da4f11 3699
14a5cf38
JH		 3700typedef struct {
3701 PerlIOBuf base; /* PerlIOBuf stuff */
3702 Mmap_t mptr; /* Mapped address */
3703 Size_t len; /* mapped length */
3704 STDCHAR *bbuf; /* malloced buffer if map fails */
06da4f11
NIS		 3705} PerlIOMmap;
3706
c3d7c7c9
NIS		 3707static size_t page_size = 0;
3708
06da4f11
NIS		 3709IV
3710PerlIOMmap_map(PerlIO *f)
3711{
14a5cf38
JH		 3712 dTHX;
3713 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3714 IV flags = PerlIOBase(f)->flags;
3715 IV code = 0;
3716 if (m->len)
3717 abort();
3718 if (flags & PERLIO_F_CANREAD) {
3719 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3720 int fd = PerlIO_fileno(f);
10eefe7f
CB		 3721 Stat_t st;
3722 code = Fstat(fd, &st);
14a5cf38
JH		 3723 if (code == 0 && S_ISREG(st.st_mode)) {
3724 SSize_t len = st.st_size - b->posn;
3725 if (len > 0) {
3726 Off_t posn;
3727 if (!page_size) {
68d873c6 3728#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
14a5cf38
JH		 3729 {
3730 SETERRNO(0, SS$_NORMAL);
68d873c6 3731# ifdef _SC_PAGESIZE
14a5cf38 3732 page_size = sysconf(_SC_PAGESIZE);
68d873c6 3733# else
14a5cf38 3734 page_size = sysconf(_SC_PAGE_SIZE);
14aaf8e8 3735# endif
14a5cf38
JH		 3736 if ((long) page_size < 0) {
3737 if (errno) {
3738 SV *error = ERRSV;
3739 char *msg;
3740 STRLEN n_a;
3741 (void) SvUPGRADE(error, SVt_PV);
3742 msg = SvPVx(error, n_a);
3743 Perl_croak(aTHX_ "panic: sysconf: %s",
3744 msg);
3745 }
3746 else
3747 Perl_croak(aTHX_
3748 "panic: sysconf: pagesize unknown");
3749 }
3750 }
68d873c6
JH		 3751#else
3752# ifdef HAS_GETPAGESIZE
14a5cf38 3753 page_size = getpagesize();
68d873c6
JH		 3754# else
3755# if defined(I_SYS_PARAM) && defined(PAGESIZE)
14a5cf38 3756 page_size = PAGESIZE; /* compiletime, bad */
68d873c6
JH		 3757# endif
3758# endif
3759#endif
14a5cf38
JH		 3760 if ((IV) page_size <= 0)
3761 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3762 (IV) page_size);
3763 }
3764 if (b->posn < 0) {
3765 /*
3766 * This is a hack - should never happen - open should
71200d45 3767 * have set it !
14a5cf38
JH		 3768 */
3769 b->posn = PerlIO_tell(PerlIONext(f));
3770 }
3771 posn = (b->posn / page_size) * page_size;
3772 len = st.st_size - posn;
3773 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3774 if (m->mptr && m->mptr != (Mmap_t) - 1) {
a5262162 3775#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
14a5cf38 3776 madvise(m->mptr, len, MADV_SEQUENTIAL);
06da4f11 3777#endif
a5262162 3778#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
14a5cf38 3779 madvise(m->mptr, len, MADV_WILLNEED);
a5262162 3780#endif
14a5cf38
JH		 3781 PerlIOBase(f)->flags =
3782 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3783 b->end = ((STDCHAR *) m->mptr) + len;
3784 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3785 b->ptr = b->buf;
3786 m->len = len;
3787 }
3788 else {
3789 b->buf = NULL;
3790 }
3791 }
3792 else {
3793 PerlIOBase(f)->flags =
3794 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3795 b->buf = NULL;
3796 b->ptr = b->end = b->ptr;
3797 code = -1;
3798 }
3799 }
3800 }
3801 return code;
06da4f11
NIS		 3802}
3803
3804IV
3805PerlIOMmap_unmap(PerlIO *f)
3806{
14a5cf38
JH		 3807 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3808 PerlIOBuf *b = &m->base;
3809 IV code = 0;
3810 if (m->len) {
3811 if (b->buf) {
3812 code = munmap(m->mptr, m->len);
3813 b->buf = NULL;
3814 m->len = 0;
3815 m->mptr = NULL;
3816 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3817 code = -1;
3818 }
3819 b->ptr = b->end = b->buf;
3820 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3821 }
3822 return code;
06da4f11
NIS		 3823}
3824
3825STDCHAR *
3826PerlIOMmap_get_base(PerlIO *f)
3827{
14a5cf38
JH		 3828 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3829 PerlIOBuf *b = &m->base;
3830 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3831 /*
71200d45 3832 * Already have a readbuffer in progress
14a5cf38
JH		 3833 */
3834 return b->buf;
3835 }
3836 if (b->buf) {
3837 /*
71200d45 3838 * We have a write buffer or flushed PerlIOBuf read buffer
14a5cf38
JH		 3839 */
3840 m->bbuf = b->buf; /* save it in case we need it again */
3841 b->buf = NULL; /* Clear to trigger below */
3842 }
3843 if (!b->buf) {
3844 PerlIOMmap_map(f); /* Try and map it */
3845 if (!b->buf) {
3846 /*
71200d45 3847 * Map did not work - recover PerlIOBuf buffer if we have one
14a5cf38
JH		 3848 */
3849 b->buf = m->bbuf;
3850 }
3851 }
3852 b->ptr = b->end = b->buf;
3853 if (b->buf)
3854 return b->buf;
3855 return PerlIOBuf_get_base(f);
06da4f11
NIS		 3856}
3857
3858SSize_t
3859PerlIOMmap_unread(PerlIO *f, const void *vbuf, Size_t count)
3860{
14a5cf38
JH		 3861 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3862 PerlIOBuf *b = &m->base;
3863 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3864 PerlIO_flush(f);
3865 if (b->ptr && (b->ptr - count) >= b->buf
3866 && memEQ(b->ptr - count, vbuf, count)) {
3867 b->ptr -= count;
3868 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3869 return count;
3870 }
3871 if (m->len) {
3872 /*
71200d45 3873 * Loose the unwritable mapped buffer
14a5cf38
JH		 3874 */
3875 PerlIO_flush(f);
3876 /*
71200d45 3877 * If flush took the "buffer" see if we have one from before
14a5cf38
JH		 3878 */
3879 if (!b->buf && m->bbuf)
3880 b->buf = m->bbuf;
3881 if (!b->buf) {
3882 PerlIOBuf_get_base(f);
3883 m->bbuf = b->buf;
3884 }
3885 }
3886 return PerlIOBuf_unread(f, vbuf, count);
06da4f11
NIS		 3887}
3888
3889SSize_t
3890PerlIOMmap_write(PerlIO *f, const void *vbuf, Size_t count)
3891{
14a5cf38
JH		 3892 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3893 PerlIOBuf *b = &m->base;
3894 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3895 /*
71200d45 3896 * No, or wrong sort of, buffer
14a5cf38
JH		 3897 */
3898 if (m->len) {
3899 if (PerlIOMmap_unmap(f) != 0)
3900 return 0;
3901 }
3902 /*
71200d45 3903 * If unmap took the "buffer" see if we have one from before
14a5cf38
JH		 3904 */
3905 if (!b->buf && m->bbuf)
3906 b->buf = m->bbuf;
3907 if (!b->buf) {
3908 PerlIOBuf_get_base(f);
3909 m->bbuf = b->buf;
3910 }
06da4f11 3911 }
14a5cf38 3912 return PerlIOBuf_write(f, vbuf, count);
06da4f11
NIS		 3913}
3914
3915IV
3916PerlIOMmap_flush(PerlIO *f)
3917{
14a5cf38
JH		 3918 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3919 PerlIOBuf *b = &m->base;
3920 IV code = PerlIOBuf_flush(f);
3921 /*
71200d45 3922 * Now we are "synced" at PerlIOBuf level
14a5cf38
JH		 3923 */
3924 if (b->buf) {
3925 if (m->len) {
3926 /*
71200d45 3927 * Unmap the buffer
14a5cf38
JH		 3928 */
3929 if (PerlIOMmap_unmap(f) != 0)
3930 code = -1;
3931 }
3932 else {
3933 /*
3934 * We seem to have a PerlIOBuf buffer which was not mapped
71200d45 3935 * remember it in case we need one later
14a5cf38
JH		 3936 */
3937 m->bbuf = b->buf;
3938 }
3939 }
3940 return code;
06da4f11
NIS		 3941}
3942
3943IV
3944PerlIOMmap_fill(PerlIO *f)
3945{
14a5cf38
JH		 3946 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3947 IV code = PerlIO_flush(f);
3948 if (code == 0 && !b->buf) {
3949 code = PerlIOMmap_map(f);
3950 }
3951 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3952 code = PerlIOBuf_fill(f);
3953 }
3954 return code;
06da4f11
NIS		 3955}
3956
3957IV
3958PerlIOMmap_close(PerlIO *f)
3959{
14a5cf38
JH		 3960 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3961 PerlIOBuf *b = &m->base;
3962 IV code = PerlIO_flush(f);
3963 if (m->bbuf) {
3964 b->buf = m->bbuf;
3965 m->bbuf = NULL;
3966 b->ptr = b->end = b->buf;
3967 }
3968 if (PerlIOBuf_close(f) != 0)
3969 code = -1;
3970 return code;
06da4f11
NIS		 3971}
3972
71200d45 3973PerlIO *
8cf8f3d1 3974PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
71200d45 3975{
a8fc9800 3976 return PerlIOBase_dup(aTHX_ f, o, param);
71200d45
NIS		 3977}
3978
06da4f11
NIS		 3979
3980PerlIO_funcs PerlIO_mmap = {
14a5cf38
JH		 3981 "mmap",
3982 sizeof(PerlIOMmap),
3983 PERLIO_K_BUFFERED,
3984 PerlIOBuf_pushed,
3985 PerlIOBase_noop_ok,
3986 PerlIOBuf_open,
3987 NULL,
3988 PerlIOBase_fileno,
71200d45 3989 PerlIOMmap_dup,
14a5cf38
JH		 3990 PerlIOBuf_read,
3991 PerlIOMmap_unread,
3992 PerlIOMmap_write,
3993 PerlIOBuf_seek,
3994 PerlIOBuf_tell,
3995 PerlIOBuf_close,
3996 PerlIOMmap_flush,
3997 PerlIOMmap_fill,
3998 PerlIOBase_eof,
3999 PerlIOBase_error,
4000 PerlIOBase_clearerr,
4001 PerlIOBase_setlinebuf,
4002 PerlIOMmap_get_base,
4003 PerlIOBuf_bufsiz,
4004 PerlIOBuf_get_ptr,
4005 PerlIOBuf_get_cnt,
4006 PerlIOBuf_set_ptrcnt,
06da4f11
NIS		 4007};
4008
14a5cf38 4009#endif /* HAS_MMAP */
06da4f11 4010
9e353e3b
NIS		 4011#undef PerlIO_stdin
4012PerlIO *
4013PerlIO_stdin(void)
4014{
a1ea730d
NIS		 4015 dTHX;
4016 if (!PL_perlio) {
14a5cf38
JH		 4017 PerlIO_stdstreams(aTHX);
4018 }
a1ea730d 4019 return &PL_perlio[1];
9e353e3b
NIS		 4020}
4021
4022#undef PerlIO_stdout
4023PerlIO *
4024PerlIO_stdout(void)
4025{
a1ea730d
NIS		 4026 dTHX;
4027 if (!PL_perlio) {
14a5cf38
JH		 4028 PerlIO_stdstreams(aTHX);
4029 }
a1ea730d 4030 return &PL_perlio[2];
9e353e3b
NIS		 4031}
4032
4033#undef PerlIO_stderr
4034PerlIO *
4035PerlIO_stderr(void)
4036{
a1ea730d
NIS		 4037 dTHX;
4038 if (!PL_perlio) {
14a5cf38
JH		 4039 PerlIO_stdstreams(aTHX);
4040 }
a1ea730d 4041 return &PL_perlio[3];
9e353e3b
NIS		 4042}
4043
4044/*--------------------------------------------------------------------------------------*/
4045
4046#undef PerlIO_getname
4047char *
4048PerlIO_getname(PerlIO *f, char *buf)
4049{
14a5cf38
JH		 4050 dTHX;
4051 char *name = NULL;
a15cef0c 4052#ifdef VMS
14a5cf38
JH		 4053 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4054 if (stdio)
4055 name = fgetname(stdio, buf);
a15cef0c 4056#else
14a5cf38 4057 Perl_croak(aTHX_ "Don't know how to get file name");
a15cef0c 4058#endif
14a5cf38 4059 return name;
9e353e3b
NIS		 4060}
4061
4062
4063/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 4064/*
4065 * Functions which can be called on any kind of PerlIO implemented in
71200d45 4066 * terms of above
14a5cf38 4067 */
9e353e3b
NIS		 4068
4069#undef PerlIO_getc
6f9d8c32 4070int
9e353e3b 4071PerlIO_getc(PerlIO *f)
760ac839 4072{
14a5cf38
JH		 4073 STDCHAR buf[1];
4074 SSize_t count = PerlIO_read(f, buf, 1);
4075 if (count == 1) {
4076 return (unsigned char) buf[0];
4077 }
4078 return EOF;
313ca112
NIS		 4079}
4080
4081#undef PerlIO_ungetc
4082int
4083PerlIO_ungetc(PerlIO *f, int ch)
4084{
14a5cf38
JH		 4085 if (ch != EOF) {
4086 STDCHAR buf = ch;
4087 if (PerlIO_unread(f, &buf, 1) == 1)
4088 return ch;
4089 }
4090 return EOF;
760ac839
LW		 4091}
4092
9e353e3b
NIS		 4093#undef PerlIO_putc
4094int
4095PerlIO_putc(PerlIO *f, int ch)
760ac839 4096{
14a5cf38
JH		 4097 STDCHAR buf = ch;
4098 return PerlIO_write(f, &buf, 1);
760ac839
LW		 4099}
4100
9e353e3b 4101#undef PerlIO_puts
760ac839 4102int
9e353e3b 4103PerlIO_puts(PerlIO *f, const char *s)
760ac839 4104{
14a5cf38
JH		 4105 STRLEN len = strlen(s);
4106 return PerlIO_write(f, s, len);
760ac839
LW		 4107}
4108
4109#undef PerlIO_rewind
4110void
c78749f2 4111PerlIO_rewind(PerlIO *f)
760ac839 4112{
14a5cf38
JH		 4113 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4114 PerlIO_clearerr(f);
6f9d8c32
NIS		 4115}
4116
4117#undef PerlIO_vprintf
4118int
4119PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4120{
14a5cf38
JH		 4121 dTHX;
4122 SV *sv = newSVpvn("", 0);
4123 char *s;
4124 STRLEN len;
4125 SSize_t wrote;
2cc61e15 4126#ifdef NEED_VA_COPY
14a5cf38
JH		 4127 va_list apc;
4128 Perl_va_copy(ap, apc);
4129 sv_vcatpvf(sv, fmt, &apc);
2cc61e15 4130#else
14a5cf38 4131 sv_vcatpvf(sv, fmt, &ap);
2cc61e15 4132#endif
14a5cf38
JH		 4133 s = SvPV(sv, len);
4134 wrote = PerlIO_write(f, s, len);
4135 SvREFCNT_dec(sv);
4136 return wrote;
760ac839
LW		 4137}
4138
4139#undef PerlIO_printf
6f9d8c32 4140int
14a5cf38 4141PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 4142{
14a5cf38
JH		 4143 va_list ap;
4144 int result;
4145 va_start(ap, fmt);
4146 result = PerlIO_vprintf(f, fmt, ap);
4147 va_end(ap);
4148 return result;
760ac839
LW		 4149}
4150
4151#undef PerlIO_stdoutf
6f9d8c32 4152int
14a5cf38 4153PerlIO_stdoutf(const char *fmt, ...)
760ac839 4154{
14a5cf38
JH		 4155 va_list ap;
4156 int result;
4157 va_start(ap, fmt);
4158 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4159 va_end(ap);
4160 return result;
760ac839
LW		 4161}
4162
4163#undef PerlIO_tmpfile
4164PerlIO *
c78749f2 4165PerlIO_tmpfile(void)
760ac839 4166{
14a5cf38 4167 /*
71200d45 4168 * I have no idea how portable mkstemp() is ...
14a5cf38 4169 */
83b075c3 4170#if defined(WIN32) || !defined(HAVE_MKSTEMP)
14a5cf38
JH		 4171 dTHX;
4172 PerlIO *f = NULL;
4173 FILE *stdio = PerlSIO_tmpfile();
4174 if (stdio) {
4175 PerlIOStdio *s =
4176 PerlIOSelf(PerlIO_push
4177 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4178 "w+", Nullsv), PerlIOStdio);
4179 s->stdio = stdio;
4180 }
4181 return f;
83b075c3 4182#else
14a5cf38
JH		 4183 dTHX;
4184 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4185 int fd = mkstemp(SvPVX(sv));
4186 PerlIO *f = NULL;
4187 if (fd >= 0) {
4188 f = PerlIO_fdopen(fd, "w+");
4189 if (f) {
4190 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4191 }
4192 PerlLIO_unlink(SvPVX(sv));
4193 SvREFCNT_dec(sv);
4194 }
4195 return f;
83b075c3 4196#endif
760ac839
LW		 4197}
4198
6f9d8c32
NIS		 4199#undef HAS_FSETPOS
4200#undef HAS_FGETPOS
4201
14a5cf38
JH		 4202#endif /* USE_SFIO */
4203#endif /* PERLIO_IS_STDIO */
760ac839 4204
9e353e3b 4205/*======================================================================================*/
14a5cf38 4206/*
71200d45
NIS		 4207 * Now some functions in terms of above which may be needed even if we are
4208 * not in true PerlIO mode
9e353e3b
NIS		 4209 */
4210
760ac839
LW		 4211#ifndef HAS_FSETPOS
4212#undef PerlIO_setpos
4213int
766a733e 4214PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 4215{
14a5cf38
JH		 4216 dTHX;
4217 if (SvOK(pos)) {
4218 STRLEN len;
4219 Off_t *posn = (Off_t *) SvPV(pos, len);
4220 if (f && len == sizeof(Off_t))
4221 return PerlIO_seek(f, *posn, SEEK_SET);
4222 }
4223 SETERRNO(EINVAL, SS$_IVCHAN);
4224 return -1;
760ac839 4225}
c411622e 4226#else
c411622e 4227#undef PerlIO_setpos
4228int
766a733e 4229PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 4230{
14a5cf38
JH		 4231 dTHX;
4232 if (SvOK(pos)) {
4233 STRLEN len;
4234 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4235 if (f && len == sizeof(Fpos_t)) {
2d4389e4 4236#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4237 return fsetpos64(f, fpos);
d9b3e12d 4238#else
14a5cf38 4239 return fsetpos(f, fpos);
d9b3e12d 4240#endif
14a5cf38 4241 }
766a733e 4242 }
14a5cf38
JH		 4243 SETERRNO(EINVAL, SS$_IVCHAN);
4244 return -1;
c411622e 4245}
4246#endif
760ac839
LW		 4247
4248#ifndef HAS_FGETPOS
4249#undef PerlIO_getpos
4250int
766a733e 4251PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 4252{
14a5cf38
JH		 4253 dTHX;
4254 Off_t posn = PerlIO_tell(f);
4255 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4256 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 4257}
c411622e 4258#else
c411622e 4259#undef PerlIO_getpos
4260int
766a733e 4261PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 4262{
14a5cf38
JH		 4263 dTHX;
4264 Fpos_t fpos;
4265 int code;
2d4389e4 4266#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 4267 code = fgetpos64(f, &fpos);
d9b3e12d 4268#else
14a5cf38 4269 code = fgetpos(f, &fpos);
d9b3e12d 4270#endif
14a5cf38
JH		 4271 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4272 return code;
c411622e 4273}
4274#endif
760ac839
LW		 4275
4276#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4277
4278int
c78749f2 4279vprintf(char *pat, char *args)
662a7e3f
CS		 4280{
4281 _doprnt(pat, args, stdout);
14a5cf38
JH		 4282 return 0; /* wrong, but perl doesn't use the return
4283 * value */
662a7e3f
CS		 4284}
4285
4286int
c78749f2 4287vfprintf(FILE *fd, char *pat, char *args)
760ac839
LW		 4288{
4289 _doprnt(pat, args, fd);
14a5cf38
JH		 4290 return 0; /* wrong, but perl doesn't use the return
4291 * value */
760ac839
LW		 4292}
4293
4294#endif
4295
4296#ifndef PerlIO_vsprintf
6f9d8c32 4297int
8ac85365 4298PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
760ac839 4299{
14a5cf38
JH		 4300 int val = vsprintf(s, fmt, ap);
4301 if (n >= 0) {
4302 if (strlen(s) >= (STRLEN) n) {
4303 dTHX;
4304 (void) PerlIO_puts(Perl_error_log,
4305 "panic: sprintf overflow - memory corrupted!\n");
4306 my_exit(1);
4307 }
760ac839 4308 }
14a5cf38 4309 return val;
760ac839
LW		 4310}
4311#endif
4312
4313#ifndef PerlIO_sprintf
6f9d8c32 4314int
14a5cf38 4315PerlIO_sprintf(char *s, int n, const char *fmt, ...)
760ac839 4316{
14a5cf38
JH		 4317 va_list ap;
4318 int result;
4319 va_start(ap, fmt);
4320 result = PerlIO_vsprintf(s, n, fmt, ap);
4321 va_end(ap);
4322 return result;
760ac839
LW		 4323}
4324#endif
7fcdafbd 4325
93a8090d
NIS		 4326
4327
4328
4329
Unnamed repository; edit this file 'description' to name the repository.