avcodec/xpmdec: avoid "magic" numbers in function hex_char_to_number()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
8 years ago · 58f0bbc1ea
parent dd0090eb21
commit 58f0bbc1ea
1 changed files with 2 additions and 2 deletions
--- a/libavcodec/xpmdec.c
+++ b/libavcodec/xpmdec.c
@ -188,9 +188,9 @@ static const ColorEntry color_table[] = {
 static unsigned hex_char_to_number(uint8_t x)
 {
    if (x >= 'a' && x <= 'f')
-        x -= 87;
+        x -= 'a' - 10;
    else if (x >= 'A' && x <= 'F')
-        x -= 55;
+        x -= 'A' - 10;
    else if (x >= '0' && x <= '9')
        x -= '0';
    else