tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Module for handling utf8 just like any other charset.
3 * By Urban Widmark 2000
4 */
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/string.h>
9#include <linux/nls.h>
10#include <linux/errno.h>
11
12static unsigned char identity[256];
13
14static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
15{
16 int n;
17
18 if ( (n = utf8_wctomb(out, uni, boundlen)) == -1) {
19 *out = '?';
20 return -EINVAL;
21 }
22 return n;
23}
24
25static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
26{
27 int n;
28
29 if ( (n = utf8_mbtowc(uni, rawstring, boundlen)) == -1) {
30 *uni = 0x003f; /* ? */
31 n = -EINVAL;
32 }
33 return n;
34}
35
36static struct nls_table table = {
37 .charset = "utf8",
38 .uni2char = uni2char,
39 .char2uni = char2uni,
40 .charset2lower = identity, /* no conversion */
41 .charset2upper = identity,
42 .owner = THIS_MODULE,
43};
44
45static int __init init_nls_utf8(void)
46{
47 int i;
48 for (i=0; i<256; i++)
49 identity[i] = i;
50
51 return register_nls(&table);
52}
53
54static void __exit exit_nls_utf8(void)
55{
56 unregister_nls(&table);
57}
58
59module_init(init_nls_utf8)
60module_exit(exit_nls_utf8)
61MODULE_LICENSE("Dual BSD/GPL");