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/* See LICENSE file for copyright and license details. */
#include "common.h"
static int
parse(char *s, struct location *location)
{
errno = 0;
location->latitude = strtod(s, &s);
if (errno)
return -1;
while (isspace(*s))
s++;
if (*s == ',' || *s == ':')
s++;
while (isspace(*s))
s++;
location->longitude = strtod(s, &s);
if (errno)
return -1;
while (isspace(*s) && *s != '\n')
s++;
return (*s && *s != '\n') ? -1 : 0;
}
int
libgeome_get_from_file(struct libgeome_context *ctx, struct libgeome_data *out, const char *path)
{
struct location location;
FILE *f;
char *line = NULL;
size_t size = 0;
int r;
if (!path)
path = libgeome_default_geolocation_file;
f = fopen(path, "r");
if (!f) {
if (errno == ENOENT)
ctx->print_debug(ctx, "fopen %s r: %s\n", path, strerror(errno));
else
ctx->print_error(ctx, "fopen %s r: %s\n", path, strerror(errno));
return 1;
}
again:
if (getline(&line, &size, f) < 0) {
if (feof(f)) {
ctx->print_debug(ctx, "%s is empty\n", path, strerror(errno));
} else {
if (errno == EINTR) {
clearerr(f);
goto again;
}
ctx->print_error(ctx, "getline %s: %s\n", path, strerror(errno));
}
fclose(f);
free(line);
return 1;
}
fclose(f);
r = parse(line, &location);
free(line);
if (!r) {
if (!isfinite(location.latitude) || !isfinite(location.longitude))
r = -1;
else if (location.latitude < -90 || location.latitude > 90)
r = -1;
else if (location.longitude < -180 || location.longitude > 180)
r = -1;
}
if (r) {
ctx->print_debug(ctx, "the first line of %s was not a coordinate pair\n", path, strerror(errno));
return 1;
}
out->requested_data &= LIBGEOME_DATUM_LATITUDE | LIBGEOME_DATUM_LONGITUDE;
if (out->requested_data) {
if (out->requested_data & LIBGEOME_DATUM_LATITUDE)
out->latitude = location.latitude;
if (out->requested_data & LIBGEOME_DATUM_LONGITUDE)
out->longitude = location.longitude;
}
return 0;
}
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