Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

include/linux/nls.h

+19 −0
Original line number Diff line number Diff line
@@ -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 */