kernel-ark/include/linux/nls.h
Denys Vlasenko b9ec0339d8 add consts where appropriate in fs/nls/*
Add const modifiers to a few struct nls_table's member pointers in
include/linux/nls.h and adds a lot of const's in fs/nls/*.c files.

Resulting changes as visible by size:

   text    data     bss     dec     hex filename
 113612  481216    2368  597196   91ccc nls.org/built-in.o
 593548    3296     288  597132   91c8c nls/built-in.o

Apparently compiler managed to optimize code a bit better
because of const-ness.

No other changes are made.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:58 -07:00

65 lines
1.6 KiB
C

#ifndef _LINUX_NLS_H
#define _LINUX_NLS_H
#include <linux/init.h>
/* unicode character */
typedef __u16 wchar_t;
struct nls_table {
const char *charset;
const char *alias;
int (*uni2char) (wchar_t uni, unsigned char *out, int boundlen);
int (*char2uni) (const unsigned char *rawstring, int boundlen,
wchar_t *uni);
const unsigned char *charset2lower;
const unsigned char *charset2upper;
struct module *owner;
struct nls_table *next;
};
/* this value hold the maximum octet of charset */
#define NLS_MAX_CHARSET_SIZE 6 /* for UTF-8 */
/* nls.c */
extern int register_nls(struct nls_table *);
extern int unregister_nls(struct nls_table *);
extern struct nls_table *load_nls(char *);
extern void unload_nls(struct nls_table *);
extern struct nls_table *load_nls_default(void);
extern int utf8_mbtowc(wchar_t *, const __u8 *, int);
extern int utf8_mbstowcs(wchar_t *, const __u8 *, int);
extern int utf8_wctomb(__u8 *, wchar_t, int);
extern int utf8_wcstombs(__u8 *, const wchar_t *, int);
static inline unsigned char nls_tolower(struct nls_table *t, unsigned char c)
{
unsigned char nc = t->charset2lower[c];
return nc ? nc : c;
}
static inline unsigned char nls_toupper(struct nls_table *t, unsigned char c)
{
unsigned char nc = t->charset2upper[c];
return nc ? nc : c;
}
static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1,
const unsigned char *s2, int len)
{
while (len--) {
if (nls_tolower(t, *s1++) != nls_tolower(t, *s2++))
return 1;
}
return 0;
}
#define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name))
#endif /* _LINUX_NLS_H */