altos: shrink Skytraq NMEA parsing more

This cuts another 78 bytes

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_gps_skytraq.c b/src/drivers/ao_gps_skytraq.c
index d88ded8bd89473e962b11cee6cab7f056eaaf26e..dd8d70ab67cf2d5acb28b1148a4d37f9e6440564 100644 (file)
--- a/src/drivers/ao_gps_skytraq.c
+++ b/src/drivers/ao_gps_skytraq.c
@@ -153,13 +153,15 @@ ao_gps_hex(void)
 static int32_t
 ao_gps_parse_pos(uint8_t deg_width) __reentrant
 {
-       int32_t d;
-       int32_t m;
-       int32_t f;
+       static __pdata uint16_t d;
+       static __pdata uint8_t  m;
+       static __pdata uint16_t f;
+       char c;
 
        d = ao_gps_decimal(deg_width);
        m = ao_gps_decimal(2);
-       if (ao_gps_char == '.') {
+       c = ao_gps_char;
+       if (c == '.') {
                f = ao_gps_decimal(4);
                while (ao_gps_num_width < 4) {
                        f *= 10;
@@ -167,17 +169,14 @@ ao_gps_parse_pos(uint8_t deg_width) __reentrant
                }
        } else {
                f = 0;
-               if (ao_gps_char != ',')
+               if (c != ',')
                        ao_gps_error = 1;
        }
-       d = d * 10000000l;
-       m = m * 10000l + f;
-       d = d + m * 50 / 3;
-       return d;
+       return d * 10000000l + (m * 10000l + f) * 50 / 3;
 }
 
 static uint8_t
-ao_gps_parse_flag(char no_c, char yes_c) __reentrant
+ao_gps_parse_flag(char no_c, char yes_c)
 {
        uint8_t ret = 0;
        ao_gps_skip_sep();