source: vendor/perl/5.8.8/ext/IO/IO.xs

Last change on this file was 3181, checked in by bird, 19 years ago

perl 5.8.8
File size: 10.1 KB
Line 
1/*
2 * Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
3 * This program is free software; you can redistribute it and/or
4 * modify it under the same terms as Perl itself.
5 */
6
7#define PERL_EXT_IO
8
9#define PERL_NO_GET_CONTEXT
10#include "EXTERN.h"
11#define PERLIO_NOT_STDIO 1
12#include "perl.h"
13#include "XSUB.h"
14#include "poll.h"
15#ifdef I_UNISTD
16# include <unistd.h>
17#endif
18#if defined(I_FCNTL) || defined(HAS_FCNTL)
19# include <fcntl.h>
20#endif
21
22#ifndef SIOCATMARK
23# ifdef I_SYS_SOCKIO
24# include <sys/sockio.h>
25# endif
26#endif
27
28#ifdef PerlIO
29#if defined(MACOS_TRADITIONAL) && defined(USE_SFIO)
30#define PERLIO_IS_STDIO 1
31#undef setbuf
32#undef setvbuf
33#define setvbuf _stdsetvbuf
34#define setbuf(f,b) ( __sf_setbuf(f,b) )
35#endif
36typedef int SysRet;
37typedef PerlIO * InputStream;
38typedef PerlIO * OutputStream;
39#else
40#define PERLIO_IS_STDIO 1
41typedef int SysRet;
42typedef FILE * InputStream;
43typedef FILE * OutputStream;
44#endif
45
46#define MY_start_subparse(fmt,flags) start_subparse(fmt,flags)
47
48#ifndef gv_stashpvn
49#define gv_stashpvn(str,len,flags) gv_stashpv(str,flags)
50#endif
51
52#ifndef __attribute__noreturn__
53# define __attribute__noreturn__
54#endif
55
56#ifndef NORETURN_FUNCTION_END
57# define NORETURN_FUNCTION_END /* NOT REACHED */ return 0
58#endif
59
60static int not_here(const char *s) __attribute__noreturn__;
61static int
62not_here(const char *s)
63{
64 croak("%s not implemented on this architecture", s);
65 NORETURN_FUNCTION_END;
66}
67
68
69#ifndef PerlIO
70#define PerlIO_fileno(f) fileno(f)
71#endif
72
73static int
74io_blocking(pTHX_ InputStream f, int block)
75{
76#if defined(HAS_FCNTL)
77 int RETVAL;
78 if(!f) {
79 errno = EBADF;
80 return -1;
81 }
82 RETVAL = fcntl(PerlIO_fileno(f), F_GETFL, 0);
83 if (RETVAL >= 0) {
84 int mode = RETVAL;
85 int newmode = mode;
86#ifdef O_NONBLOCK
87 /* POSIX style */
88
89# ifndef O_NDELAY
90# define O_NDELAY O_NONBLOCK
91# endif
92 /* Note: UNICOS and UNICOS/mk a F_GETFL returns an O_NDELAY
93 * after a successful F_SETFL of an O_NONBLOCK. */
94 RETVAL = RETVAL & (O_NONBLOCK | O_NDELAY) ? 0 : 1;
95
96 if (block == 0) {
97 newmode &= ~O_NDELAY;
98 newmode |= O_NONBLOCK;
99 } else if (block > 0) {
100 newmode &= ~(O_NDELAY|O_NONBLOCK);
101 }
102#else
103 /* Not POSIX - better have O_NDELAY or we can't cope.
104 * for BSD-ish machines this is an acceptable alternative
105 * for SysV we can't tell "would block" from EOF but that is
106 * the way SysV is...
107 */
108 RETVAL = RETVAL & O_NDELAY ? 0 : 1;
109
110 if (block == 0) {
111 newmode |= O_NDELAY;
112 } else if (block > 0) {
113 newmode &= ~O_NDELAY;
114 }
115#endif
116 if (newmode != mode) {
117 const int ret = fcntl(PerlIO_fileno(f),F_SETFL,newmode);
118 if (ret < 0)
119 RETVAL = ret;
120 }
121 }
122 return RETVAL;
123#else
124 return -1;
125#endif
126}
127
128MODULE = IO PACKAGE = IO::Seekable PREFIX = f
129
130void
131fgetpos(handle)
132 InputStream handle
133 CODE:
134 if (handle) {
135#ifdef PerlIO
136 ST(0) = sv_newmortal();
137#if PERL_VERSION < 8
138 Fpos_t pos;
139 if (PerlIO_getpos(handle, &pos) != 0) {
140 ST(0) = &PL_sv_undef;
141 }
142 else {
143 sv_setpvn(ST(0), (char *)&pos, sizeof(Fpos_t));
144 }
145#else
146 if (PerlIO_getpos(handle, ST(0)) != 0) {
147 ST(0) = &PL_sv_undef;
148 }
149#endif
150#else
151 Fpos_t pos;
152 if (fgetpos(handle, &pos)) {
153 ST(0) = &PL_sv_undef;
154 } else {
155 ST(0) = sv_2mortal(newSVpvn((char*)&pos, sizeof(Fpos_t)));
156 }
157#endif
158 }
159 else {
160 errno = EINVAL;
161 ST(0) = &PL_sv_undef;
162 }
163
164SysRet
165fsetpos(handle, pos)
166 InputStream handle
167 SV * pos
168 CODE:
169 if (handle) {
170#ifdef PerlIO
171#if PERL_VERSION < 8
172 char *p;
173 STRLEN len;
174 if (SvOK(pos) && (p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
175 RETVAL = PerlIO_setpos(handle, (Fpos_t*)p);
176 }
177 else {
178 RETVAL = -1;
179 errno = EINVAL;
180 }
181#else
182 RETVAL = PerlIO_setpos(handle, pos);
183#endif
184#else
185 char *p;
186 STRLEN len;
187 if ((p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
188 RETVAL = fsetpos(handle, (Fpos_t*)p);
189 }
190 else {
191 RETVAL = -1;
192 errno = EINVAL;
193 }
194#endif
195 }
196 else {
197 RETVAL = -1;
198 errno = EINVAL;
199 }
200 OUTPUT:
201 RETVAL
202
203MODULE = IO PACKAGE = IO::File PREFIX = f
204
205void
206new_tmpfile(packname = "IO::File")
207 char * packname
208 PREINIT:
209 OutputStream fp;
210 GV *gv;
211 CODE:
212#ifdef PerlIO
213 fp = PerlIO_tmpfile();
214#else
215 fp = tmpfile();
216#endif
217 gv = (GV*)SvREFCNT_inc(newGVgen(packname));
218 hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
219 if (do_open(gv, "+>&", 3, FALSE, 0, 0, fp)) {
220 ST(0) = sv_2mortal(newRV((SV*)gv));
221 sv_bless(ST(0), gv_stashpv(packname, TRUE));
222 SvREFCNT_dec(gv); /* undo increment in newRV() */
223 }
224 else {
225 ST(0) = &PL_sv_undef;
226 SvREFCNT_dec(gv);
227 }
228
229MODULE = IO PACKAGE = IO::Poll
230
231void
232_poll(timeout,...)
233 int timeout;
234PPCODE:
235{
236#ifdef HAS_POLL
237 const int nfd = (items - 1) / 2;
238 SV *tmpsv = NEWSV(999,nfd * sizeof(struct pollfd));
239 struct pollfd *fds = (struct pollfd *)SvPVX(tmpsv);
240 int i,j,ret;
241 for(i=1, j=0 ; j < nfd ; j++) {
242 fds[j].fd = SvIV(ST(i));
243 i++;
244 fds[j].events = (short)SvIV(ST(i));
245 i++;
246 fds[j].revents = 0;
247 }
248 if((ret = poll(fds,nfd,timeout)) >= 0) {
249 for(i=1, j=0 ; j < nfd ; j++) {
250 sv_setiv(ST(i), fds[j].fd); i++;
251 sv_setiv(ST(i), fds[j].revents); i++;
252 }
253 }
254 SvREFCNT_dec(tmpsv);
255 XSRETURN_IV(ret);
256#else
257 not_here("IO::Poll::poll");
258#endif
259}
260
261MODULE = IO PACKAGE = IO::Handle PREFIX = io_
262
263void
264io_blocking(handle,blk=-1)
265 InputStream handle
266 int blk
267PROTOTYPE: $;$
268CODE:
269{
270 const int ret = io_blocking(aTHX_ handle, items == 1 ? -1 : blk ? 1 : 0);
271 if(ret >= 0)
272 XSRETURN_IV(ret);
273 else
274 XSRETURN_UNDEF;
275}
276
277MODULE = IO PACKAGE = IO::Handle PREFIX = f
278
279int
280ungetc(handle, c)
281 InputStream handle
282 int c
283 CODE:
284 if (handle)
285#ifdef PerlIO
286 RETVAL = PerlIO_ungetc(handle, c);
287#else
288 RETVAL = ungetc(c, handle);
289#endif
290 else {
291 RETVAL = -1;
292 errno = EINVAL;
293 }
294 OUTPUT:
295 RETVAL
296
297int
298ferror(handle)
299 InputStream handle
300 CODE:
301 if (handle)
302#ifdef PerlIO
303 RETVAL = PerlIO_error(handle);
304#else
305 RETVAL = ferror(handle);
306#endif
307 else {
308 RETVAL = -1;
309 errno = EINVAL;
310 }
311 OUTPUT:
312 RETVAL
313
314int
315clearerr(handle)
316 InputStream handle
317 CODE:
318 if (handle) {
319#ifdef PerlIO
320 PerlIO_clearerr(handle);
321#else
322 clearerr(handle);
323#endif
324 RETVAL = 0;
325 }
326 else {
327 RETVAL = -1;
328 errno = EINVAL;
329 }
330 OUTPUT:
331 RETVAL
332
333int
334untaint(handle)
335 SV * handle
336 CODE:
337#ifdef IOf_UNTAINT
338 IO * io;
339 io = sv_2io(handle);
340 if (io) {
341 IoFLAGS(io) |= IOf_UNTAINT;
342 RETVAL = 0;
343 }
344 else {
345#endif
346 RETVAL = -1;
347 errno = EINVAL;
348#ifdef IOf_UNTAINT
349 }
350#endif
351 OUTPUT:
352 RETVAL
353
354SysRet
355fflush(handle)
356 OutputStream handle
357 CODE:
358 if (handle)
359#ifdef PerlIO
360 RETVAL = PerlIO_flush(handle);
361#else
362 RETVAL = Fflush(handle);
363#endif
364 else {
365 RETVAL = -1;
366 errno = EINVAL;
367 }
368 OUTPUT:
369 RETVAL
370
371void
372setbuf(handle, ...)
373 OutputStream handle
374 CODE:
375 if (handle)
376#ifdef PERLIO_IS_STDIO
377 {
378 char *buf = items == 2 && SvPOK(ST(1)) ?
379 sv_grow(ST(1), BUFSIZ) : 0;
380 setbuf(handle, buf);
381 }
382#else
383 not_here("IO::Handle::setbuf");
384#endif
385
386SysRet
387setvbuf(...)
388 CODE:
389 if (items != 4)
390 Perl_croak(aTHX_ "Usage: IO::Handle::setvbuf(handle, buf, type, size)");
391#if defined(PERLIO_IS_STDIO) && defined(_IOFBF) && defined(HAS_SETVBUF)
392 {
393 OutputStream handle = 0;
394 char * buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
395 int type;
396 int size;
397
398 if (items == 4) {
399 handle = IoOFP(sv_2io(ST(0)));
400 buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
401 type = (int)SvIV(ST(2));
402 size = (int)SvIV(ST(3));
403 }
404 if (!handle) /* Try input stream. */
405 handle = IoIFP(sv_2io(ST(0)));
406 if (items == 4 && handle)
407 RETVAL = setvbuf(handle, buf, type, size);
408 else {
409 RETVAL = -1;
410 errno = EINVAL;
411 }
412 }
413#else
414 RETVAL = (SysRet) not_here("IO::Handle::setvbuf");
415#endif
416 OUTPUT:
417 RETVAL
418
419
420SysRet
421fsync(handle)
422 OutputStream handle
423 CODE:
424#ifdef HAS_FSYNC
425 if(handle)
426 RETVAL = fsync(PerlIO_fileno(handle));
427 else {
428 RETVAL = -1;
429 errno = EINVAL;
430 }
431#else
432 RETVAL = (SysRet) not_here("IO::Handle::sync");
433#endif
434 OUTPUT:
435 RETVAL
436
437
438MODULE = IO PACKAGE = IO::Socket
439
440SysRet
441sockatmark (sock)
442 InputStream sock
443 PROTOTYPE: $
444 PREINIT:
445 int fd;
446 CODE:
447 {
448 fd = PerlIO_fileno(sock);
449#ifdef HAS_SOCKATMARK
450 RETVAL = sockatmark(fd);
451#else
452 {
453 int flag = 0;
454# ifdef SIOCATMARK
455# if defined(NETWARE) || defined(WIN32)
456 if (ioctl(fd, SIOCATMARK, (void*)&flag) != 0)
457# else
458 if (ioctl(fd, SIOCATMARK, &flag) != 0)
459# endif
460 XSRETURN_UNDEF;
461# else
462 not_here("IO::Socket::atmark");
463# endif
464 RETVAL = flag;
465 }
466#endif
467 }
468 OUTPUT:
469 RETVAL
470
471BOOT:
472{
473 HV *stash;
474 /*
475 * constant subs for IO::Poll
476 */
477 stash = gv_stashpvn("IO::Poll", 8, TRUE);
478#ifdef POLLIN
479 newCONSTSUB(stash,"POLLIN",newSViv(POLLIN));
480#endif
481#ifdef POLLPRI
482 newCONSTSUB(stash,"POLLPRI", newSViv(POLLPRI));
483#endif
484#ifdef POLLOUT
485 newCONSTSUB(stash,"POLLOUT", newSViv(POLLOUT));
486#endif
487#ifdef POLLRDNORM
488 newCONSTSUB(stash,"POLLRDNORM", newSViv(POLLRDNORM));
489#endif
490#ifdef POLLWRNORM
491 newCONSTSUB(stash,"POLLWRNORM", newSViv(POLLWRNORM));
492#endif
493#ifdef POLLRDBAND
494 newCONSTSUB(stash,"POLLRDBAND", newSViv(POLLRDBAND));
495#endif
496#ifdef POLLWRBAND
497 newCONSTSUB(stash,"POLLWRBAND", newSViv(POLLWRBAND));
498#endif
499#ifdef POLLNORM
500 newCONSTSUB(stash,"POLLNORM", newSViv(POLLNORM));
501#endif
502#ifdef POLLERR
503 newCONSTSUB(stash,"POLLERR", newSViv(POLLERR));
504#endif
505#ifdef POLLHUP
506 newCONSTSUB(stash,"POLLHUP", newSViv(POLLHUP));
507#endif
508#ifdef POLLNVAL
509 newCONSTSUB(stash,"POLLNVAL", newSViv(POLLNVAL));
510#endif
511 /*
512 * constant subs for IO::Handle
513 */
514 stash = gv_stashpvn("IO::Handle", 10, TRUE);
515#ifdef _IOFBF
516 newCONSTSUB(stash,"_IOFBF", newSViv(_IOFBF));
517#endif
518#ifdef _IOLBF
519 newCONSTSUB(stash,"_IOLBF", newSViv(_IOLBF));
520#endif
521#ifdef _IONBF
522 newCONSTSUB(stash,"_IONBF", newSViv(_IONBF));
523#endif
524#ifdef SEEK_SET
525 newCONSTSUB(stash,"SEEK_SET", newSViv(SEEK_SET));
526#endif
527#ifdef SEEK_CUR
528 newCONSTSUB(stash,"SEEK_CUR", newSViv(SEEK_CUR));
529#endif
530#ifdef SEEK_END
531 newCONSTSUB(stash,"SEEK_END", newSViv(SEEK_END));
532#endif
533}
534
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