diff options
| author | Jeff Layton <jlayton@redhat.com> | 2009-04-30 06:45:08 -0400 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2009-04-30 15:32:11 +0000 |
| commit | d37dc42ab6f040b8f0f2962ab219c5b2accf748d (patch) | |
| tree | 5030ecff53843afe1f362cdca3d0794cda17fac1 /include | |
| parent | cbb7fe129bb2b836083ebcc256c43faff4b48cc2 (diff) | |
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: Jeff Layton <jlayton@redhat.com>
Acked-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/nls.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/nls.h b/include/linux/nls.h index 6a882208301..52b1a76c1b4 100644 --- a/include/linux/nls.h +++ b/include/linux/nls.h @@ -58,6 +58,25 @@ static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1, 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)) #endif /* _LINUX_NLS_H */ |