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/* See LICENSE file for copyright and license details. */
#include "common.h"
int
parse_coord(const char *s, double *lat, double *lat_min, double *lat_max, double *lon, double *lon_min, double *lon_max)
{
int withsign = 0, neg;
long int tmp;
double prec;
errno = 0;
if (s[0] == ':') {
*lat = 0;
*lat_min = -90;
*lat_max = +90;
} else {
prec = 1;
withsign = (s[0] == '-' || s[0] == '+');
neg = s[0] == '-';
s = &s[withsign];
tmp = 0;
if (isdigit(s[withsign])) {
tmp = strtol(s, (void *)&s, 0);
if (errno || tmp > INT_MAX)
return -1;
}
*lat = (double)tmp;
if (s[0] == '.') {
for (s++; isdigit(*s); s++) {
*lat *= 10;
*lat += (double)(*s & 15);
prec *= 10;
}
*lat /= prec;
}
if (!withsign && (s[0] == 'N' || s[0] == 'S')) {
neg = s[0] == 'S';
s = &s[1];
}
if (neg)
*lat = -*lat;
prec = (1 / prec) / 2;
*lat_min = *lat - prec;
*lat_max = *lat + prec;
if (s[0] != ':')
return -1;
}
s = &s[1];
if (!s[0]) {
*lon = 0;
*lon_min = -180;
*lon_max = +180;
} else {
prec = 1;
withsign = (s[0] == '-' || s[0] == '+');
neg = s[0] == '-';
s = &s[withsign];
tmp = 0;
if (isdigit(s[withsign])) {
tmp = strtol(s, (void *)&s, 0);
if (errno || tmp > INT_MAX)
return -1;
}
*lon = (double)tmp;
if (s[0] == '.') {
for (s++; isdigit(*s); s++) {
*lon *= 10;
*lon += (double)(*s & 15);
prec *= 10;
}
*lon /= prec;
}
if (!withsign && (s[0] == 'E' || s[0] == 'W')) {
neg = s[0] == 'W';
s = &s[1];
}
if (neg)
*lon = -*lon;
prec = (1 / prec) / 2;
*lon_min = *lon - prec;
*lon_max = *lon + prec;
if (s[0])
return -1;
}
return 0;
}
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