ReactOS  0.4.13-dev-563-g0561610
nls_koi8-ru.c
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1 /*
2  * linux/fs/nls_koi8-ru.c
3  *
4  * Charset koi8-ru translation based on charset koi8-u.
5  * The Unicode to charset table has only exact mappings.
6  */
7 
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>
13 
14 static struct nls_table *p_nls;
15 
16 static int uni2char(const wchar_t uni,
17  unsigned char *out, int boundlen)
18 {
19  if (boundlen <= 0)
20  return -ENAMETOOLONG;
21 
22  if ((uni & 0xffaf) == 0x040e || (uni & 0xffce) == 0x254c) {
23  /* koi8-ru and koi8-u differ only on two characters */
24  if (uni == 0x040e)
25  out[0] = 0xbe;
26  else if (uni == 0x045e)
27  out[0] = 0xae;
28  else if (uni == 0x255d || uni == 0x256c)
29  return 0;
30  else
31  return p_nls->uni2char(uni, out, boundlen);
32  return 1;
33  }
34  else
35  /* fast path */
36  return p_nls->uni2char(uni, out, boundlen);
37 }
38 
39 static int char2uni(const unsigned char *rawstring, int boundlen,
40  wchar_t *uni)
41 {
42  int n;
43 
44  if ((*rawstring & 0xef) != 0xae) {
45  /* koi8-ru and koi8-u differ only on two characters */
46  *uni = (*rawstring & 0x10) ? 0x040e : 0x045e;
47  return 1;
48  }
49 
50  n = p_nls->char2uni(rawstring, boundlen, uni);
51  return n;
52 }
53 
54 static struct nls_table table = {
55  /* .charset */ "koi8-ru",
56  /* .alias */ 0,
57  /* .uni2char */ uni2char,
58  /* .char2uni */ char2uni,
59  0, 0,
60  /* .owner */ THIS_MODULE,
61 };
62 
63 static int __init init_nls_koi8_ru(void)
64 {
65  p_nls = load_nls("koi8-u");
66 
67  if (p_nls) {
68  table.charset2upper = p_nls->charset2upper;
69  table.charset2lower = p_nls->charset2lower;
70  return register_nls(&table);
71  }
72 
73  return -EINVAL;
74 }
75 
76 static void __exit exit_nls_koi8_ru(void)
77 {
80 }
81 
84 
85 MODULE_LICENSE("Dual BSD/GPL");
int unregister_nls(struct nls_table *)
Definition: nls_base.c:185
Definition: arc.h:39
GLdouble n
Definition: glext.h:7729
static int __init init_nls_koi8_ru(void)
Definition: nls_koi8-ru.c:63
#define THIS_MODULE
Definition: module.h:267
void unload_nls(struct nls_table *)
Definition: nls_base.c:240
static void __exit exit_nls_koi8_ru(void)
Definition: nls_koi8-ru.c:76
static int uni2char(const wchar_t uni, unsigned char *out, int boundlen)
Definition: nls_koi8-ru.c:16
static FILE * out
Definition: regtests2xml.c:44
module_exit(journal_exit)
int register_nls(struct nls_table *)
Definition: nls_base.c:162
#define __init
Definition: compat.h:3
#define __exit
Definition: module.h:265
static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
Definition: nls_koi8-ru.c:39
module_init(journal_init)
#define MODULE_LICENSE(x)
Definition: module.h:268
struct nls_table * load_nls(char *)
Definition: nls_base.c:218
static struct nls_table * p_nls
Definition: nls_koi8-ru.c:14