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