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/**************************************************************************
*
* $Id: gpsutils.c 1.4.1.2 2004/11/09 14:42:36 martin REL_M $
*
* Copyright (c) Meinberg Funkuhren, Bad Pyrmont, Germany
*
* Description:
* Utility functions useful with GPS data.
*
* -----------------------------------------------------------------------
* $Log: gpsutils.c $
* Revision 1.4.1.2 2004/11/09 14:42:36 martin
* Use C99 fixed-size types in swap_double().
* Revision 1.4.1.1 2003/05/16 08:36:27 MARTIN
* Fixed sprint_dms() to work correctly under QNX.
* Revision 1.4 2003/01/31 13:45:19 MARTIN
* sprint_pos_geo() returns N/A if position not valid.
* Revision 1.3 2002/12/12 16:07:04 martin
* New functions swap_pos_doubles(), sprint_dms(),
* and sprint_pos_geo().
* Revision 1.2 2001/02/05 09:39:12Z MARTIN
* New file header.
* Change include file name to lower case.
* Source code cleanup.
*
**************************************************************************/
#define _GPSUTILS
#include <gpsutils.h>
#undef _GPSUTILS
#include <stdio.h>
#include <string.h>
#define _eos( _s ) ( &(_s)[strlen( _s )] )
/*HDR*/
void swap_double( double *d )
{
uint16_t *wp1;
uint16_t *wp2;
uint16_t w;
int i;
wp1 = (uint16_t *) d;
wp2 = ( (uint16_t *) d ) + 3;
for ( i = 0; i < 2; i++ )
{
w = *wp1;
*wp1 = *wp2;
*wp2 = w;
wp1++;
wp2--;
}
} /* swap_double */
/*HDR*/
void swap_eph_doubles( EPH *ephp )
{
swap_double( &ephp->sqrt_A );
swap_double( &ephp->e );
swap_double( &ephp->M0 );
swap_double( &ephp->omega );
swap_double( &ephp->i0 );
swap_double( &ephp->OMEGA0 );
swap_double( &ephp->OMEGADOT );
swap_double( &ephp->deltan );
swap_double( &ephp->idot );
swap_double( &ephp->crc );
swap_double( &ephp->crs );
swap_double( &ephp->cuc );
swap_double( &ephp->cus );
swap_double( &ephp->cic );
swap_double( &ephp->cis );
swap_double( &ephp->af0 );
swap_double( &ephp->af1 );
swap_double( &ephp->af2 );
swap_double( &ephp->tgd );
} /* swap_eph_doubles */
/*HDR*/
void swap_alm_doubles( ALM *almp )
{
swap_double( &almp->sqrt_A );
swap_double( &almp->e );
swap_double( &almp->deltai );
swap_double( &almp->OMEGA0 );
swap_double( &almp->OMEGADOT );
swap_double( &almp->omega );
swap_double( &almp->M0 );
swap_double( &almp->af0 );
swap_double( &almp->af1 );
} /* swap_alm_doubles */
/*HDR*/
void swap_utc_doubles( UTC *utcp )
{
swap_double( &utcp->A0 );
swap_double( &utcp->A1 );
} /* swap_utc_doubles */
/*HDR*/
void swap_iono_doubles( IONO *ionop )
{
swap_double( &ionop->alpha_0 );
swap_double( &ionop->alpha_1 );
swap_double( &ionop->alpha_2 );
swap_double( &ionop->alpha_3 );
swap_double( &ionop->beta_0 );
swap_double( &ionop->beta_1 );
swap_double( &ionop->beta_2 );
swap_double( &ionop->beta_3 );
} /* swap_iono_doubles */
/*HDR*/
void swap_pos_doubles( POS *posp )
{
int i;
for ( i = 0; i < N_XYZ; i++ )
swap_double( &posp->xyz[i] );
for ( i = 0; i < N_LLA; i++ )
swap_double( &posp->lla[i] );
swap_double( &posp->longitude.sec );
swap_double( &posp->latitude.sec );
} /* swap_pos_doubles */
/*HDR*/
void sprint_dms( char *s, DMS *pdms, int prec )
{
sprintf( s, "%c %i%c%02i'%02.*f\"",
pdms->prefix,
pdms->deg,
C_DEGREE,
pdms->min,
prec,
pdms->sec
);
} /* sprint_dms */
/*HDR*/
void sprint_pos_geo( char *s, POS *ppos, const char *sep, int prec )
{
if ( ppos->lla[LON] && ppos->lla[LAT] && ppos->lla[ALT] )
{
sprint_dms( s, &ppos->latitude, prec );
strcat( s, sep );
sprint_dms( _eos( s ), &ppos->longitude, prec );
strcat( s, sep );
sprintf( _eos( s ), "%.0fm", ppos->lla[ALT] );
}
else
strcpy( s, "N/A" );
} /* sprint_pos_geo */
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