Reserve upcall IDs 0-31 for system use.
[dragonfly.git] / lib / libc / locale / frune.c
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1/*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
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35 *
36 * @(#)frune.c 8.1 (Berkeley) 6/4/93
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37 */
38
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39#include <limits.h>
40#include <rune.h>
41#include <stddef.h>
42#include <stdio.h>
43
44long
45fgetrune(fp)
46 FILE *fp;
47{
48 rune_t r;
49 int c, len;
50 char buf[MB_LEN_MAX];
51 char const *result;
52
53 len = 0;
54 do {
55 if ((c = getc(fp)) == EOF) {
56 if (len)
57 break;
58 return (EOF);
59 }
60 buf[len++] = c;
61
62 if ((r = sgetrune(buf, len, &result)) != _INVALID_RUNE)
63 return (r);
64 } while (result == buf && len < MB_LEN_MAX);
65
66 while (--len > 0)
67 ungetc(buf[len], fp);
68 return (_INVALID_RUNE);
69}
70
71int
72fungetrune(r, fp)
73 rune_t r;
74 FILE* fp;
75{
76 int len;
77 char buf[MB_LEN_MAX];
78
79 len = sputrune(r, buf, MB_LEN_MAX, 0);
80 while (len-- > 0)
81 if (ungetc(buf[len], fp) == EOF)
82 return (EOF);
83 return (0);
84}
85
86int
87fputrune(r, fp)
88 rune_t r;
89 FILE *fp;
90{
91 int i, len;
92 char buf[MB_LEN_MAX];
93
94 len = sputrune(r, buf, MB_LEN_MAX, 0);
95
96 for (i = 0; i < len; ++i)
97 if (putc(buf[i], fp) == EOF)
98 return (EOF);
99
100 return (0);
101}