ll_s2f.c

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <sys/time.h>
 
/* function converts a sting of lat/long into int deg,min,sec and float degrees */
 
int ll_s2f(char *dms, int *deg, int *min, int *sec, float *dec_deg)
{
 
char cd[4],cm[3],cs[3];
   
int len;
int d,m,s;
float dd;
 
  len=strlen(dms);
  if(len <=5 || len >=8)
  {
    d=0;
    m=0;
    s=0;
    dd=0.;
  }
  else
  {
    if(len==6)
    {
      strncpy(cd,dms,2);
      strncpy(cm,dms+2,2);
      strncpy(cs,dms+4,2);
    }
    else
    {
      strncpy(cd,dms,3);
      strncpy(cm,dms+3,2);
      strncpy(cs,dms+5,2);
    }
 
    sscanf(cd,"%d",&d);
    sscanf(cm,"%d",&m);
    sscanf(cs,"%d",&s);
 
    dd=d+((float)m/60.)+((float)s/3600.);
  }
 
  *deg=d;
  *min=m;
  *sec=s;
  *dec_deg=dd;
  return(0);
}