startrek: add an input routine for x.yz fixed point co-ords

diff --git a/Applications/games/startrek.c b/Applications/games/startrek.c
index b2aca07..2502623 100644 (file)
--- a/Applications/games/startrek.c
+++ b/Applications/games/startrek.c
@@ -256,6 +256,34 @@ static double input_dec(void)
        return atof(x);
 }
 
+/* Input a value between 0.00 and 9.99 */
+static int16_t input_f00(void)
+{
+       int16_t v;
+       char buf[8];
+       char *x;
+       input(buf, 8);
+       x = buf;
+       if (!isdigit(*x))
+               return -1;
+       v = 100 * (*x++ - '0');
+       if (*x == 0)
+               return v;
+       if (*x++ != '.')
+               return -1;
+       if (!*x)
+               return v;
+       if (!isdigit(*x))
+               return -1;
+       v += 10 * (*x++ - '0');
+       if (!*x)
+               return v;
+       if (!isdigit(*x))
+               return -1;
+       v += *x++ - '0';
+       return v;
+}
+
 /* Integer: unsigned, or returns -1 for blank/error */
 static int input_int(void)
 {