ungetwc.c (e74101e4eff767325553039def89de70b70f36d3) ungetwc.c (24990dfad088db7073e30b8870d62366fb510cd3)
1/*-
2 * Copyright (c) 2002 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include "namespace.h"
31#include <errno.h>
1/*-
2 * Copyright (c) 2002 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 15 unchanged lines hidden (view full) ---

24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include "namespace.h"
31#include <errno.h>
32#include <rune.h>
33#include <stdio.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <wchar.h>
35#include "un-namespace.h"
36#include "libc_private.h"
37#include "local.h"
38
39wint_t
40ungetwc(wint_t wc, FILE *fp)
41{
34#include <wchar.h>
35#include "un-namespace.h"
36#include "libc_private.h"
37#include "local.h"
38
39wint_t
40ungetwc(wint_t wc, FILE *fp)
41{
42 char buf[MB_LEN_MAX];
43 mbstate_t mbs;
44 size_t len;
42
43 ORIENTLOCK(fp, 1);
44
45
46 ORIENTLOCK(fp, 1);
47
45 return (fungetrune((rune_t)wc, fp) == EOF ? WEOF : wc);
48 if (wc == WEOF)
49 return (WEOF);
50
51 memset(&mbs, 0, sizeof(mbs));
52 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1)
53 return (WEOF);
54 while (len-- != 0)
55 if (ungetc((unsigned char)buf[len], fp) == EOF)
56 return (WEOF);
57
58 return (wc);
46}
59}