notes: move hex_to_bytes() to hex.c and export it

Make the function for converting pairs of hexadecimal digits to binary
available to other call sites.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 17 deletions

diff --git a/notes.c b/notes.c
index 5c62862..04f8c86 100644
--- a/notes.c
+++ b/notes.c
@@ -334,23 +334,6 @@ static void note_tree_free(struct int_node *tree)
 	}
 }
 
-/*
- * Read `len` pairs of hexadecimal digits from `hex` and write the
- * values to `binary` as `len` bytes. Return 0 on success, or -1 if
- * the input does not consist of hex digits).
- */
-static int hex_to_bytes(unsigned char *binary, const char *hex, size_t len)
-{
-	for (; len; len--, hex += 2) {
-		unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
-
-		if (val & ~0xff)
-			return -1;
-		*binary++ = val;
-	}
-	return 0;
-}
-
 static int non_note_cmp(const struct non_note *a, const struct non_note *b)
 {
 	return strcmp(a->path, b->path);