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-rw-r--r--include/linux/nls.h19
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 */