public static uint GetUInt24(IDataStream stream, ulong offset)
{
byte[] bytes32 = new byte[4];
byte[] bytes24 = stream.GetBytes(offset, 3);
Array.Copy(bytes24, bytes32, 3);
return(BitConverter.ToUInt32(bytes32, 0));
}
public override int Read(byte[] buffer, int offset, int count)
{
ulong read = Math.Min((ulong)count, _stream.StreamLength - _position);
_stream.GetBytes(_position, read);
_position += read;
return((int)read);
}
public static string CreateTemporaryFile(IDataStream stream)
{
ulong BLOCK_SIZE = 1024 * 1024; // Write 1MB at a time
string tempFile = Path.GetTempFileName();
BinaryWriter writer = new BinaryWriter(new FileStream(tempFile, FileMode.Create));
ulong offset = 0;
while (offset < stream.StreamLength)
{
ulong read = Math.Min(BLOCK_SIZE, stream.StreamLength - offset);
writer.Write(stream.GetBytes(offset, read));
offset += read;
}
writer.Close();
return(tempFile);
}
public static int GetInt24(IDataStream stream, ulong offset)
{
byte[] bytes32 = new byte[4];
byte[] bytes24 = stream.GetBytes(offset, 3);
Array.Copy(bytes24, bytes32, 3);
int res = BitConverter.ToInt32(bytes32, 0);
if ((bytes32[2] & 0x80) == 0x80)
{
return(res - 0x1000000);
}
else
{
return(res);
}
}
public static int GetInt24(IDataStream stream, ulong offset) {
byte[] bytes32 = new byte[4];
byte[] bytes24 = stream.GetBytes(offset, 3);
Array.Copy(bytes24, bytes32, 3);
int res = BitConverter.ToInt32(bytes32, 0);
if ((bytes32[2] & 0x80) == 0x80) {
return res - 0x1000000;
} else {
return res;
}
}
private static bool IsGif(IDataStream stream)
{
if (stream.StreamLength > 6) {
byte[] header = stream.GetBytes(0, 3);
return header[0] == 'G' && header[1] == 'I' && header[2] == 'F';
}
return false;
}
public static ulong GetArbitraryUInt(IDataStream stream, ulong offset, int intSize) {
return GetArbitraryUInt(stream.GetBytes(offset, (ulong)intSize), 0, intSize);
}
public static ushort GetUInt16(IDataStream stream, ulong offset)
{
return(BitConverter.ToUInt16(stream.GetBytes(offset, 2), 0));
}
public static byte GetByte(IDataStream stream, ulong offset)
{
return(stream.GetBytes(offset, 1)[0]);
}
public static ulong GetUInt64(IDataStream stream, ulong offset)
{
return(BitConverter.ToUInt64(stream.GetBytes(offset, 8), 0));
}
public static string GetHexString(IDataStream stream, ulong offset, ulong count)
{
count = Math.Min(count, stream.StreamLength - offset);
return(BitConverter.ToString(stream.GetBytes(offset, count)));
}
public static uint GetUInt32(IDataStream stream, ulong offset) {
return BitConverter.ToUInt32(stream.GetBytes(offset, 4), 0);
}
public static ushort GetUInt16(IDataStream stream, ulong offset) {
return BitConverter.ToUInt16(stream.GetBytes(offset, 2), 0);
}
public static byte GetByte(IDataStream stream, ulong offset) {
return stream.GetBytes(offset, 1)[0];
}
public static byte[] GetBytes(IDataStream stream) {
return stream.GetBytes(0, stream.StreamLength);
}
public static string CreateTemporaryFile(IDataStream stream) {
ulong BLOCK_SIZE = 1024 * 1024; // Write 1MB at a time
string tempFile = Path.GetTempFileName();
BinaryWriter writer = new BinaryWriter(new FileStream(tempFile, FileMode.Create));
ulong offset = 0;
while (offset < stream.StreamLength) {
ulong read = Math.Min(BLOCK_SIZE, stream.StreamLength - offset);
writer.Write(stream.GetBytes(offset, read));
offset += read;
}
writer.Close();
return tempFile;
}
public static string GetUnicodeString(IDataStream stream, ulong offset, ulong count) {
count = Math.Min(count, stream.StreamLength - offset);
return Encoding.Unicode.GetString(stream.GetBytes(offset, count), 0, (int)count);
}
public static string GetHexString(IDataStream stream, ulong offset, ulong count) {
count = Math.Min(count, stream.StreamLength - offset);
return BitConverter.ToString(stream.GetBytes(offset, count));
}
public static ulong GetArbitraryUInt(IDataStream stream, ulong offset, int intSize)
{
return(GetArbitraryUInt(stream.GetBytes(offset, (ulong)intSize), 0, intSize));
}
public static uint GetUInt24(IDataStream stream, ulong offset) {
byte[] bytes32 = new byte[4];
byte[] bytes24 = stream.GetBytes(offset, 3);
Array.Copy(bytes24, bytes32, 3);
return BitConverter.ToUInt32(bytes32, 0);
}
public static string GetUnicodeString(IDataStream stream, ulong offset, ulong count)
{
count = Math.Min(count, stream.StreamLength - offset);
return(Encoding.Unicode.GetString(stream.GetBytes(offset, count), 0, (int)count));
}
private static bool IsPng(IDataStream stream)
{
if (stream.StreamLength > 8) {
byte[] header = stream.GetBytes(0, 8);
return header[0] == 0x89
&& header[1] == 0x50
&& header[2] == 0x4E
&& header[3] == 0x47
&& header[4] == 0x0D
&& header[5] == 0x0A
&& header[6] == 0x1A
&& header[7] == 0x0A;
}
return false;
}
public static byte[] GetBytes(IDataStream stream)
{
return(stream.GetBytes(0, stream.StreamLength));
}
private static bool IsTif(IDataStream stream)
{
if (stream.StreamLength > 4) {
byte[] header = stream.GetBytes(0, 4);
return ((header[0] == 'I' && header[1] == 'I')
|| (header[0] == 'M' && header[1] == 'M'))
&& BitConverter.ToUInt16(header, 2) == 42;
}
return false;
}
public static uint GetUInt32(IDataStream stream, ulong offset)
{
return(BitConverter.ToUInt32(stream.GetBytes(offset, 4), 0));
}
private static bool IsBmp(IDataStream stream)
{
if (stream.StreamLength > 2) {
byte[] header = stream.GetBytes(0, 2);
return header[0] == 0x42 && header[1] == 0x4D;
}
return false;
}
public virtual byte[] GetBytes(ulong offset, ulong length)
{
return(_stream.GetBytes(_start + offset, length));
}
public static ulong GetUInt64(IDataStream stream, ulong offset) {
return BitConverter.ToUInt64(stream.GetBytes(offset, 8), 0);
}
