public Location getLocation(long ipnum)
{
int record_pointer;
byte[] record_buf = new byte[FULL_RECORD_LENGTH];
char[] record_buf2 = new char[FULL_RECORD_LENGTH];
int record_buf_offset = 0;
Location record = new Location();
int str_length = 0;
int j, Seek_country;
double latitude = 0, longitude = 0;
try
{
Seek_country = SeekCountry(ipnum);
if (Seek_country == databaseSegments[0])
{
return(null);
}
record_pointer = Seek_country + ((2 * recordLength - 1) * databaseSegments[0]);
if ((dboptions & GEOIP_MEMORY_CACHE) == 1)
{
Array.Copy(dbbuffer, record_pointer, record_buf, 0, Math.Min(dbbuffer.Length - record_pointer, FULL_RECORD_LENGTH));
}
else
{
lock (ioLock)
{
file.Seek(record_pointer, SeekOrigin.Begin);
file.Read(record_buf, 0, FULL_RECORD_LENGTH);
}
}
for (int a0 = 0; a0 < FULL_RECORD_LENGTH; a0++)
{
record_buf2[a0] = Convert.ToChar(record_buf[a0]);
}
// get country
record.countryCode = countryCode[unsignedByteToInt(record_buf[0])];
record.countryName = countryName[unsignedByteToInt(record_buf[0])];
record_buf_offset++;
// get region
while (record_buf[record_buf_offset + str_length] != '\0')
{
str_length++;
}
if (str_length > 0)
{
record.region = new String(record_buf2, record_buf_offset, str_length);
}
record_buf_offset += str_length + 1;
str_length = 0;
// get region_name
record.regionName = RegionName.getRegionName(record.countryCode, record.region);
// get city
while (record_buf[record_buf_offset + str_length] != '\0')
{
str_length++;
}
if (str_length > 0)
{
record.city = new String(record_buf2, record_buf_offset, str_length);
}
record_buf_offset += (str_length + 1);
str_length = 0;
// get postal code
while (record_buf[record_buf_offset + str_length] != '\0')
{
str_length++;
}
if (str_length > 0)
{
record.postalCode = new String(record_buf2, record_buf_offset, str_length);
}
record_buf_offset += (str_length + 1);
// get latitude
for (j = 0; j < 3; j++)
{
latitude += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
}
record.latitude = (float)latitude / 10000 - 180;
record_buf_offset += 3;
// get longitude
for (j = 0; j < 3; j++)
{
longitude += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
}
record.longitude = (float)longitude / 10000 - 180;
record.metro_code = record.dma_code = 0;
record.area_code = 0;
if (databaseType == DatabaseInfo.CITY_EDITION_REV1)
{
// get metro_code
int metroarea_combo = 0;
if (record.countryCode == "US")
{
record_buf_offset += 3;
for (j = 0; j < 3; j++)
{
metroarea_combo += (unsignedByteToInt(record_buf[record_buf_offset + j]) << (j * 8));
}
record.metro_code = record.dma_code = metroarea_combo / 1000;
record.area_code = metroarea_combo % 1000;
}
}
}
catch (IOException)
{
Console.Write("IO Exception while seting up segments");
}
return(record);
}