public DatabaseInfo getDatabaseInfo()
{
if (databaseInfo != null) {
return databaseInfo;
}
try {
// Synchronize since we're accessing the database file.
lock (this) {
bool hasStructureInfo = false;
byte [] delim = new byte[3];
// Advance to part of file where database info is stored.
file.Seek(-3,SeekOrigin.End);
for (int i=0; i<STRUCTURE_INFO_MAX_SIZE; i++) {
file.Read(delim,0,3);
if (delim[0] == 255 && delim[1] == 255 && delim[2] == 255) {
hasStructureInfo = true;
break;
}
}
if (hasStructureInfo) {
file.Seek(-3,SeekOrigin.Current);
}
else {
// No structure info, must be pre Sep 2002 database, go back to end.
file.Seek(-3,SeekOrigin.End);
}
// Find the database info string.
for (int i=0; i<DATABASE_INFO_MAX_SIZE; i++) {
file.Read(delim,0,3);
if (delim[0]==0 && delim[1]==0 && delim[2]==0) {
byte[] dbInfo = new byte[i];
char[] dbInfo2 = new char[i];
file.Read(dbInfo,0,i);
for (int a0 = 0;a0 < i;a0++){
dbInfo2[a0] = Convert.ToChar(dbInfo[a0]);
}
// Create the database info object using the string.
this.databaseInfo = new DatabaseInfo(new String(dbInfo2));
return databaseInfo;
}
file.Seek(-4,SeekOrigin.Current);
}
}
}
catch (Exception e) {
Console.Write(e.Message);
//e.printStackTrace();
}
return new DatabaseInfo("");
}
public DatabaseInfo getDatabaseInfo()
{
if (databaseInfo != null)
{
return databaseInfo;
}
try
{
if ((dboptions & GEOIP_MEMORY_CACHE) == 1)
{
int indexStart = -1;
int indexEnd = dbbuffer.Length;
for (int i = dbbuffer.Length - STRUCTURE_INFO_MAX_SIZE - 1; i < dbbuffer.Length; i++)
{
if (dbbuffer[i + 0] == 255 && dbbuffer[i + 1] == 255 && dbbuffer[i + 2] == 255)
{
indexEnd = i;
break;
}
}
for (int i = dbbuffer.Length - 1; i > dbbuffer.Length - DATABASE_INFO_MAX_SIZE; i--)
{
if (dbbuffer[i - 0] == 0 && dbbuffer[i - 1] == 0 && dbbuffer[i - 2] == 0)
{
indexStart = i + 1;
break;
}
}
if (indexStart == -1)
throw new IOException("databaseInfo: buffer is corrupted.");
char[] dbInfo = new char[indexEnd - indexStart];
for (int a0 = indexStart, i = 0; a0 < indexEnd; a0++, i++)
{
dbInfo[i] = Convert.ToChar(dbbuffer[a0]);
}
// Create the database info object using the string.
this.databaseInfo = new DatabaseInfo(new String(dbInfo));
return databaseInfo;
}
else
{
// Synchronize since we're accessing the database file.
lock (ioLock)
{
bool hasStructureInfo = false;
byte[] delim = new byte[3];
// Advance to part of file where database info is stored.
file.Seek(-3, SeekOrigin.End);
for (int i = 0; i < STRUCTURE_INFO_MAX_SIZE; i++)
{
file.Read(delim, 0, 3);
if (delim[0] == 255 && delim[1] == 255 && delim[2] == 255)
{
hasStructureInfo = true;
break;
}
file.Seek(-4, SeekOrigin.Current);
}
if (hasStructureInfo)
{
file.Seek(-6, SeekOrigin.Current);
}
else
{
// No structure info, must be pre Sep 2002 database, go back to end.
file.Seek(-3, SeekOrigin.End);
}
// Find the database info string.
for (int i = 0; i < DATABASE_INFO_MAX_SIZE; i++)
{
file.Read(delim, 0, 3);
if (delim[0] == 0 && delim[1] == 0 && delim[2] == 0)
{
byte[] dbInfo = new byte[i];
char[] dbInfo2 = new char[i];
file.Read(dbInfo, 0, i);
for (int a0 = 0; a0 < i; a0++)
{
dbInfo2[a0] = Convert.ToChar(dbInfo[a0]);
}
// Create the database info object using the string.
this.databaseInfo = new DatabaseInfo(new String(dbInfo2));
return databaseInfo;
}
file.Seek(-4, SeekOrigin.Current);
}
}
}
}
catch (Exception e)
{
throw new Exception("Error reading database info", e);
//e.printStackTrace();
}
return new DatabaseInfo("");
}
