Commit d37dc42a authored by Jeff Layton's avatar Jeff Layton Committed by Steve French

nls: add a nls_nullsize inline

It's possible for character sets to require a multi-byte null
string terminator. Add a helper function that determines the size
of the null terminator at runtime.
Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Acked-by: default avatarSuresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent cbb7fe12
...@@ -58,6 +58,25 @@ static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1, ...@@ -58,6 +58,25 @@ static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1,
return 0; return 0;
} }
/*
* nls_nullsize - return length of null character for codepage
* @codepage - codepage for which to return length of NULL terminator
*
* Since we can't guarantee that the null terminator will be a particular
* length, we have to check against the codepage. If there's a problem
* determining it, assume a single-byte NULL terminator.
*/
static inline int
nls_nullsize(const struct nls_table *codepage)
{
int charlen;
char tmp[NLS_MAX_CHARSET_SIZE];
charlen = codepage->uni2char(0, tmp, NLS_MAX_CHARSET_SIZE);
return charlen > 0 ? charlen : 1;
}
#define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name)) #define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name))
#endif /* _LINUX_NLS_H */ #endif /* _LINUX_NLS_H */
......
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