#include "ps_info.h"
#include <string.h>

static int scan_percent(char *,double *,double,double);

int 
scan_easting (char *buf, double *f)
{
    if (scan_percent(buf, f, PS.w.west, PS.w.east)) return 1;
    return G_scan_easting(buf, f, PS.w.proj);
}

int 
scan_northing (char *buf, double *f)
{
    if (scan_percent(buf, f, PS.w.south, PS.w.north)) return 1;
    return G_scan_northing(buf, f, PS.w.proj);
}

int 
scan_resolution (char *buf, double *f)
{
    return G_scan_resolution(buf, f, PS.w.proj);
}

static int scan_percent(char *buf, double *f,double min,double max)
{
    char percent[3];
    *percent = 0;
    if (sscanf(buf, "%lf%2s", f, percent) != 2) return 0;
    if (strcmp(percent, "%") != 0) return 0;
    *f = min + (max-min) * (*f/100.0);
    return 1;
}