fix indentation and simplify hex.decode_sequence

core/encoding/hex/hex.odin

@@ -36,22 +36,21 @@ decode :: proc(src: []byte, allocator := context.allocator) -> (dst: []byte, ok:
 }
 
 // Decodes the given sequence into one byte.
-// Should be called with one rune worth of the source, eg: 0x23 -> '#'.
+// Should be called with one byte worth of the source, eg: 0x23 -> '#'.
-decode_sequence :: proc(str: string) -> (byte, bool) {
+decode_sequence :: proc(str: string) -> (res: byte, ok: bool) {
-	no_prefix_str := strings.trim_prefix(str, "0x")
+	str := str
-	val: byte
+	if strings.has_prefix(str, "0x") || strings.has_prefix(str, "0X") {
-	for i := 0; i < len(no_prefix_str); i += 1 {
+		str = str[2:]
-		index := (len(no_prefix_str) - 1) - i // reverse the loop.
+	}
 
-		hd, ok := hex_digit(no_prefix_str[i])
+	if len(str) != 2 {
-		if !ok {
 		return 0, false
 	}
 
-		val += u8(hd) << uint(4 * index)
+	upper := hex_digit(str[0]) or_return
-	}
+	lower := hex_digit(str[1]) or_return
 
-	return val, true
+	return upper << 4 | lower, true
 }
 
 @(private)