diff options
Diffstat (limited to 'gpsd.h')
| -rw-r--r-- | gpsd.h | 29 |
1 files changed, 29 insertions, 0 deletions
@@ -263,8 +263,37 @@ enum isgpsstat_t isgps_decode(struct gps_device_t *session, bool (*preamble_match)(isgps30bits_t *), bool (*length_check)(struct gps_device_t *), unsigned int c); +extern unsigned bitreverse(unsigned x, unsigned w); extern enum isgpsstat_t rtcm_decode(struct gps_device_t *, unsigned int); +/* macros for byte-order-independent bitfield extraction */ +#if WORDS_BIGENDIAN +#define signed16(x) (int16_t)bitreverse(x, 16) +#define signed8(x) (int8_t)bitreverse(x, 8) +#define unsigned2(x) bitreverse(x, 2) +#define unsigned3(x) bitreverse(x, 3) +#define unsigned4(x) bitreverse(x, 4) +#define unsigned5(x) bitreverse(x, 5) +#define unsigned6(x) bitreverse(x, 6) +#define unsigned8(x) bitreverse(x, 8) +#define unsigned10(x) bitreverse(x, 10) +#define unsigned13(x) bitreverse(x, 13) +#define unsigned16(x) bitreverse(x, 16) +#define unsigned24(x) bitreverse(x, 24) +#else +#define signed8(x) x +#define signed16(x) x +#define unsigned2(x) x +#define unsigned3(x) x +#define unsigned4(x) x +#define unsigned5(x) x +#define unsigned6(x) x +#define unsigned8(x) x +#define unsigned10(x) x +#define unsigned13(x) x +#define unsigned16(x) x +#define unsigned24(x) x +#endif extern void rtcm_dump(struct gps_device_t *, /*@out@*/char[], size_t); |