caiyu/gps-sdr-sim
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gpssim.c: Use 'const' keyword for read-only function input arguments

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It is generally good coding practise to use the const qualifier on
arguments that are pointers to input-only arguments of functions.
This commit is contained in:
Harald Welte 2015-08-20 22:30:54 +02:00
parent aca19119fd
commit 22f0122275
1 changed files with 12 additions and 12 deletions
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24
gpssim.c
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@ -247,7 +247,7 @@ void codegen(int *ca, int prn)
return; return;
} }
void date2gps(datetime_t *t, gpstime_t *g) void date2gps(const datetime_t *t, gpstime_t *g)
{ {
int doy[12] = {0,31,59,90,120,151,181,212,243,273,304,334}; int doy[12] = {0,31,59,90,120,151,181,212,243,273,304,334};
int ye; int ye;
@ -272,7 +272,7 @@ void date2gps(datetime_t *t, gpstime_t *g)
return; return;
} }
void xyz2llh(double *xyz, double *llh) void xyz2llh(const double *xyz, double *llh)
{ {
double a,eps,e,e2; double a,eps,e,e2;
double x,y,z; double x,y,z;
@ -312,7 +312,7 @@ void xyz2llh(double *xyz, double *llh)
return; return;
} }
void llh2xyz(double *llh, double *xyz) void llh2xyz(const const double *llh, double *xyz)
{ {
double n; double n;
double a; double a;
@ -346,7 +346,7 @@ void llh2xyz(double *llh, double *xyz)
return; return;
} }
void ltcmat(double *llh, double t[3][3]) void ltcmat(const double *llh, double t[3][3])
{ {
double slat, clat; double slat, clat;
double slon, clon; double slon, clon;
@ -369,7 +369,7 @@ void ltcmat(double *llh, double t[3][3])
return; return;
} }
void ecef2neu(double *xyz, double t[3][3], double *neu) void ecef2neu(const double *xyz, double t[3][3], double *neu)
{ {
neu[0] = t[0][0]*xyz[0] + t[0][1]*xyz[1] + t[0][2]*xyz[2]; neu[0] = t[0][0]*xyz[0] + t[0][1]*xyz[1] + t[0][2]*xyz[2];
neu[1] = t[1][0]*xyz[0] + t[1][1]*xyz[1] + t[1][2]*xyz[2]; neu[1] = t[1][0]*xyz[0] + t[1][1]*xyz[1] + t[1][2]*xyz[2];
@ -378,7 +378,7 @@ void ecef2neu(double *xyz, double t[3][3], double *neu)
return; return;
} }
void neu2azel(double *azel, double *neu) void neu2azel(double *azel, const double *neu)
{ {
double ne; double ne;
@ -498,7 +498,7 @@ void satpos(ephem_t eph, gpstime_t g, double *pos, double *vel, double *clk)
return; return;
} }
void eph2sbf(ephem_t eph, unsigned long sbf[5][10]) void eph2sbf(const ephem_t eph, unsigned long sbf[5][10])
{ {
unsigned long wn; unsigned long wn;
unsigned long toe; unsigned long toe;
@ -722,7 +722,7 @@ int checkExpDesignator(char *str, int len)
return(n); return(n);
} }
int readRinexNav(ephem_t eph[], char *fname) int readRinexNav(ephem_t eph[], const char *fname)
{ {
FILE *fp; FILE *fp;
int nsat; int nsat;
@ -963,7 +963,7 @@ int readRinexNav(ephem_t eph[], char *fname)
return(nsat); return(nsat);
} }
void subVect(double *y, double *x1, double *x2) void subVect(double *y, const double *x1, const double *x2)
{ {
y[0] = x1[0]-x2[0]; y[0] = x1[0]-x2[0];
y[1] = x1[1]-x2[1]; y[1] = x1[1]-x2[1];
@ -972,12 +972,12 @@ void subVect(double *y, double *x1, double *x2)
return; return;
} }
double normVect(double *x) double normVect(const double *x)
{ {
return(sqrt(x[0]*x[0]+x[1]*x[1]+x[2]*x[2])); return(sqrt(x[0]*x[0]+x[1]*x[1]+x[2]*x[2]));
} }
double dotProd(double *x1, double *x2) double dotProd(const double *x1, const double *x2)
{ {
return(x1[0]*x2[0]+x1[1]*x2[1]+x1[2]*x2[2]); return(x1[0]*x2[0]+x1[1]*x2[1]+x1[2]*x2[2]);
} }
@ -1060,7 +1060,7 @@ void computeCodePhase(channel_t *chan, range_t rho0, range_t rho1, double dt)
return; return;
} }
int readUserMotion(double xyz[USER_MOTION_SIZE][3], char *filename) int readUserMotion(double xyz[USER_MOTION_SIZE][3], const char *filename)
{ {
FILE *fp; FILE *fp;
int numd; int numd;