2 * linux/fs/nls/nls_koi8-ru.c
4 * Charset koi8-ru translation based on charset koi8-u.
5 * The Unicode to charset table has only exact mappings.
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/string.h>
11 #include <linux/nls.h>
12 #include <linux/errno.h>
14 static struct nls_table *p_nls;
16 static int uni2char(const wchar_t uni,
17 unsigned char *out, int boundlen)
22 if ((uni & 0xffaf) == 0x040e || (uni & 0xffce) == 0x254c) {
23 /* koi8-ru and koi8-u differ only on two characters */
26 else if (uni == 0x045e)
28 else if (uni == 0x255d || uni == 0x256c)
31 return p_nls->uni2char(uni, out, boundlen);
36 return p_nls->uni2char(uni, out, boundlen);
39 static int char2uni(const unsigned char *rawstring, int boundlen,
44 if ((*rawstring & 0xef) != 0xae) {
45 /* koi8-ru and koi8-u differ only on two characters */
46 *uni = (*rawstring & 0x10) ? 0x040e : 0x045e;
50 n = p_nls->char2uni(rawstring, boundlen, uni);
54 static struct nls_table table = {
61 static int __init init_nls_koi8_ru(void)
63 p_nls = load_nls("koi8-u");
66 table.charset2upper = p_nls->charset2upper;
67 table.charset2lower = p_nls->charset2lower;
68 return register_nls(&table);
74 static void __exit exit_nls_koi8_ru(void)
76 unregister_nls(&table);
80 module_init(init_nls_koi8_ru)
81 module_exit(exit_nls_koi8_ru)
83 MODULE_LICENSE("Dual BSD/GPL");