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using System;
using System.IO;
namespace NW4RTools {
public class OutputStream {
// TODO: look into making this (and InputStream) inherit from Stream, or something
public readonly ByteEndian Endian;
private readonly bool MustReverseArrays;
private readonly System.IO.MemoryStream BaseStream;
public int Position {
get { return (int)BaseStream.Position; }
}
public byte[] GetBuffer() {
return BaseStream.ToArray();
}
public OutputStream() {
BaseStream = new MemoryStream();
Endian = ByteEndian.BigEndian;
MustReverseArrays = BitConverter.IsLittleEndian;
}
public OutputStream(ByteEndian endian) {
BaseStream = new MemoryStream();
Endian = endian;
if (Endian == ByteEndian.BigEndian)
MustReverseArrays = BitConverter.IsLittleEndian;
else
MustReverseArrays = !BitConverter.IsLittleEndian;
}
public void Seek(int pos) {
if (pos < 0 || pos > BaseStream.Length)
throw new ArgumentOutOfRangeException();
BaseStream.Position = pos;
}
public void AlignTo(int num) {
if ((Position & (num - 1)) == 0)
return;
for (int i = (num - (Position & (num - 1))); i != 0; i--) {
WriteByte(0);
}
}
public void AddPadding(int count) {
if (count <= 0)
return;
else if (count == 1)
WriteByte(0);
else
for (int i = count; i != 0; i--)
WriteByte(0);
}
public void PadToSize(int size) {
AddPadding(size - Position);
}
public void WriteBytes(byte[] data) {
BaseStream.Write(data, 0, data.Length);
}
private void WriteReversedBytes(byte[] data) {
// TODO: figure out if this modifies the array
if (MustReverseArrays)
Array.Reverse(data);
BaseStream.Write(data, 0, data.Length);
}
public void WriteByte(byte val) {
BaseStream.WriteByte(val);
}
public void WriteSByte(sbyte val) {
WriteByte(unchecked((byte)val));
}
public void WriteInt16(Int16 val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteUInt16(UInt16 val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteInt32(Int32 val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteUInt32(UInt32 val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteFloat(float val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteDouble(double val) {
WriteReversedBytes(BitConverter.GetBytes(val));
}
public void WriteBool(bool val) {
// TODO: ReadBool in InputStream
WriteByte(val ? (byte)1 : (byte)0);
}
public void WriteColor(Color col) {
WriteByte(col.r);
WriteByte(col.g);
WriteByte(col.b);
WriteByte(col.a);
}
public void WriteVec2(Vec2 vec) {
WriteFloat(vec.x);
WriteFloat(vec.y);
}
public void WriteVec3(Vec3 vec) {
WriteFloat(vec.x);
WriteFloat(vec.y);
WriteFloat(vec.z);
}
public void WriteMatrix(Matrix m) {
WriteFloat(m.v00);
WriteFloat(m.v01);
WriteFloat(m.v02);
WriteFloat(m.v03);
WriteFloat(m.v10);
WriteFloat(m.v11);
WriteFloat(m.v12);
WriteFloat(m.v13);
WriteFloat(m.v20);
WriteFloat(m.v21);
WriteFloat(m.v22);
WriteFloat(m.v23);
}
public void WriteName(string name) {
byte[] encoded = System.Text.Encoding.GetEncoding("Shift_JIS").GetBytes(name);
WriteInt32(encoded.Length);
WriteBytes(encoded);
WriteByte(0);
// add 1 to the length to include the zero byte
if (((encoded.Length + 1) & 3) != 0) {
for (int i = 4 - ((encoded.Length + 1) & 3); i > 0; i--) {
WriteByte(0);
}
}
}
}
}
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