Add function that calculates UTF-16 string length.

It will be used in future.

diff --git a/libexfat/exfat.h b/libexfat/exfat.h
index 5887a43..6670ae3 100644 (file)
--- a/libexfat/exfat.h
+++ b/libexfat/exfat.h
@@ -117,6 +117,7 @@ int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
                size_t insize);
 int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
                size_t insize);
+size_t utf16_length(const le16_t* str);
 
 struct exfat_node* exfat_get_node(struct exfat_node* node);
 void exfat_put_node(struct exfat* ef, struct exfat_node* node);

diff --git a/libexfat/utf.c b/libexfat/utf.c
index 6465661..8598d70 100644 (file)
--- a/libexfat/utf.c
+++ b/libexfat/utf.c
@@ -211,3 +211,12 @@ int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
        *outp = cpu_to_le16(0);
        return 0;
 }
+
+size_t utf16_length(const le16_t* str)
+{
+       size_t i = 0;
+
+       while (le16_to_cpu(str[i]))
+               i++;
+       return i;
+}