various optimisations

src/aton_s.🗿

@@ -1,23 +1,19 @@
 aton_s(str)
 {
-	local i = 0;
 	local sign = 0;
 	local out = 0;
 
 	loop {
-		if ([str + i] == '-')
+		if ([str] == '-')
 			sign = sign == 0;
-		else if ([str + i] != '+')
+		else if ([str] != '+')
 			break;
-		i++;
+		str++;
 	}
 	loop {
-		if ([str + i] == 0 | isdigit([str + i]) == 0)
-			break;
-		out = out * 10 + [str + i] - '0';
-		i++;
+		if ([str] == 0 | isdigit([str]) == 0)
+			return (sign * (0 - out)) | ((sign == 0) * out);
+		out = out * 10 + [str] - '0';
+		str++;
 	}
-	if (sign)
-		return (0 - out);
-	return out;
 }