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- using Fr.BahaBulle.Tools.Common;
- using Fr.BahaBulle.Tools.Parser;
- using Fr.BahaBulle.Tools.TraceLog;
- using System;
- using System.Collections.Generic;
- using System.Diagnostics;
- using System.IO;
- using System.Text;
-
- namespace Fr.BahaBulle.Compression.Valis
- {
- internal static class cValis
- {
- private struct st_param
- {
- public int length;
- public int offset;
- }
-
- public static bool ValisDecompression(List<Parser.stParam> param)
- {
- Parser parser = Parser.INSTANCE;
-
- if (param.Count != 2)
- {
- Trace.WriteLine(string.Format("Number of parameters incorrect - 2 waited ; got {0}", param.Count));
- return false;
- }
-
- Parser.stStream source = default(Parser.stStream);
- long source_adress = 0;
-
- Parser.stStream destination = default(Parser.stStream);
-
- object obj;
-
- foreach (Parser.stParam arg in param)
- {
- if (arg.name == "source")
- {
- obj = parser.GetParam(arg.param, "file");
- if (obj == null)
- {
- Trace.WriteLine("Parameter file not found");
- return false;
- }
- else
- source = (Parser.stStream)obj;
-
- obj = parser.GetParam(arg.param, "adress", "long");
- if (obj != null)
- source_adress = (long)obj;
- else
- source_adress = 0;
- }
- else if (arg.name == "dest")
- {
- obj = parser.GetParam(arg.param, "file", null, true);
- if (obj == null)
- destination = parser.NewStream(arg.param["file"], true);
- else
- destination = (Parser.stStream)obj;
- }
- else
- {
- Trace.WriteLine(string.Format("Incorrect option - source, dest, pointer ; get {0}", arg.name));
- return false;
- }
- }
-
- source.file.Position = source_adress;
-
- if (!Decomp(source, destination))
- return false;
-
- if (!string.IsNullOrEmpty(destination.filename))
- parser.WriteStream(destination);
-
- return true;
- }
-
- public static bool ValisCompression(List<Parser.stParam> param)
- {
- Parser parser = Parser.INSTANCE;
-
- if (param.Count != 2)
- {
- Trace.WriteLine(string.Format("Number of parameters incorrect - 2 waited ; got {0}", param.Count));
- return false;
- }
-
- Parser.stStream source = default(Parser.stStream);
-
- Parser.stStream destination = default(Parser.stStream);
-
- object obj;
-
- foreach (Parser.stParam arg in param)
- {
- if (arg.name == "source")
- {
- obj = parser.GetParam(arg.param, "file");
- if (obj == null)
- {
- Trace.WriteLine("Parameter file not found");
- return false;
- }
- else
- source = (Parser.stStream)obj;
- }
- else if (arg.name == "dest")
- {
- obj = parser.GetParam(arg.param, "file", null, true);
- if (obj == null)
- destination = parser.NewStream(arg.param["file"], true);
- else
- destination = (Parser.stStream)obj;
- }
- else
- {
- Trace.WriteLine(string.Format("Incorrect option - source, dest, pointer ; get {0}", arg.name));
- return false;
- }
- }
-
- if (!Comp(source, destination))
- return false;
-
- return true;
- }
-
- #region Private methods
-
- /// <summary>
- /// Initialise the buffer
- /// </summary>
- /// <returns></returns>
- private static byte[] InitBuffer(int size = 0x1000)
- {
- byte[] buffer = new byte[size];
-
- int pos = 0;
- byte value = 0x00;
- for (int i = 0; i < 0x100; i++)
- {
- for (int j = 0; j < 13; j++)
- {
- buffer[pos++] = value;
- }
-
- value++;
- }
-
- value = 0x00;
- for (int i = 0; i < 0x100; i++)
- {
- buffer[pos++] = value++;
- }
-
- value = 0xFF;
- for (int i = 0; i < 0x100; i++)
- {
- buffer[pos++] = value--;
- }
-
- for (int i = 0; i < 0x80; i++)
- {
- buffer[pos++] = 0x00;
- }
-
- for (int i = 0; i < 0x80; i++)
- {
- buffer[pos++] = 0x20;
- }
-
- return buffer;
- }
-
- /// <summary>
- /// Find the greater LZ compression from a position
- /// </summary>
- /// <param name="a_bytes">Array of bytes where look for RLE compression</param>
- /// <param name="pos">Current position in the array</param>
- /// <returns></returns>
- private static st_param FindLZInBuffer(byte[] a_bytes, int pos, int size_buffer, int len_max)
- {
- st_param param;
- int dict = 0;
- int pos_result = 0;
- int len_result = 0;
-
- if (pos > 0x1000)
- dict = pos - 0xFFF;
-
- while (dict < pos)
- {
- int len = 0;
-
- while (pos + len < a_bytes.Length && a_bytes[dict + len] == a_bytes[pos + len] && (len < len_max))
- len++;
-
- if (len >= len_result)
- {
- pos_result = dict;
- len_result = len;
- }
-
- dict++;
- }
-
- param.length = len_result;
- param.offset = pos_result;
-
- return param;
- }
-
- /// <summary>
- /// Decompress a stream
- /// </summary>
- /// <param name="Source">Stream to decompress</param>
- /// <param name="Destination">Destination stream</param>
- /// <returns></returns>
- private static bool Decomp(Parser.stStream Source, Parser.stStream Destination)
- {
- int pos = 0xFEE;
- int curr_pos = 0;
- byte[] bytes = new byte[0x1000];
- byte one_byte;
- UInt16 two_bytes;
-
- LogTrace trace = LogTrace.INSTANCE;
-
- try
- {
- using (BinaryReader br = new BinaryReader(Source.file, Encoding.Default, true))
- {
- UInt32 size_in = br.ReadUInt32().ToBigEndian32();
- UInt32 size_out = br.ReadUInt32().ToBigEndian32();
-
- bytes = InitBuffer();
-
- if (trace.TSwitch.TraceVerbose)
- {
- using (BinaryWriter bw = new BinaryWriter(File.Open("buffer.bin", FileMode.Create)))
- {
- bw.Write(bytes);
- }
- }
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format("Size IN {0}\nSize OUT {1}", size_in, size_out));
-
- while (curr_pos < size_out)
- {
- byte header = br.ReadByte();
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format("header {0:X08} : {1:X02}", br.BaseStream.Position - 1, header));
-
- for (int i = 0; i < 8; i++)
- {
- if ((header & 1) == 1)
- {
- one_byte = br.ReadByte();
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" {0} - Ecrit {1:X08} : {2:X02}", i, Destination.file.Position, one_byte));
-
- Destination.file.WriteByte(one_byte);
- curr_pos++;
- bytes[pos] = one_byte;
-
- pos = (pos + 1) & 0xFFF;
- }
- else
- {
- two_bytes = br.ReadUInt16();
-
- int nb = ((two_bytes >> 8) & 0x0F) + 3;
- int pos_lz = ((two_bytes & 0xF000) >> 4) | (two_bytes & 0xFF);
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" {0} - LZ : {1:X04}", i, two_bytes));
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" nb : 0x{0:X02} ({1})", nb, nb));
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" Pos : 0x{0:X04} ({1})", pos_lz, pos_lz));
- Trace.WriteIf(trace.TSwitch.TraceVerbose, string.Format(" Ecrit {0:X08} : ", Destination.file.Position));
-
- for (int j = 0; j < nb; j++)
- {
- Destination.file.WriteByte(bytes[pos_lz]);
- curr_pos++;
- bytes[pos] = bytes[pos_lz];
- Trace.WriteIf(trace.TSwitch.TraceVerbose, string.Format("{0:X02} ", bytes[pos_lz]));
-
- pos = (pos + 1) & 0xFFF;
- pos_lz = (pos_lz + 1) & 0xFFF;
- }
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, "");
- }
-
- header >>= 1;
-
- if (curr_pos >= size_out)
- break;
- }
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, "");
- }
- }
-
- return true;
- }
- catch (Exception ex)
- {
- Trace.WriteLine(string.Format("(EE) {0}", ex.Message));
- return false;
- }
- }
-
- /// <summary>
- /// Compress a stream
- /// </summary>
- /// <param name="Source">Stream to compress</param>
- /// <param name="Destination">Destination stream</param>
- /// <returns></returns>
- private static bool Comp(Parser.stStream Source, Parser.stStream Destination)
- {
- st_param param_lz;
- int size_out = (int)Source.file.Length;
- int pos_temp = 0;
- int pos = 0xFEE;
- int curr_pos = pos;
- byte[] b_size_out = BitConverter.GetBytes(size_out.ToBigEndian32());
- byte[] temp = new byte[24];
- int buffer_size = 0x1000;
-
- LogTrace trace = LogTrace.INSTANCE;
-
- try
- {
- Source.file.Position = 0;
- Destination.file.Position = 0;
-
- Destination.file.Write(b_size_out, 0, 4);
- Destination.file.Write(b_size_out, 0, 4);
-
- byte[] bytes = InitBuffer(pos + size_out);
- Source.file.Read(bytes, pos, size_out);
-
- while (curr_pos < size_out + pos)
- {
- byte header = 0;
-
- for (int i = 0; i < 8; i++)
- {
- if (curr_pos >= size_out + pos)
- break;
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format("{0} - Pos : {1:X}", i, curr_pos - pos));
-
- param_lz = FindLZInBuffer(bytes, curr_pos, buffer_size, 0x12);
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" nb LZ : {0:000}", param_lz.length));
-
- if (param_lz.length < 3)
- {
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" -> Byte : {0:X02}", bytes[curr_pos]));
-
- temp[pos_temp++] = bytes[curr_pos];
-
- header |= (byte)(1 << i);
- curr_pos++;
- }
- else
- {
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" POS_LZ : {0:X04}", param_lz.offset));
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format(" -> LZ : {0:X02}{1:X02}", (byte)(((param_lz.offset & 0xF00) >> 4) | ((param_lz.length - 3) & 0x0F)), (byte)(param_lz.offset & 0xFF)));
-
- temp[pos_temp++] = (byte)(param_lz.offset & 0xFF);
- temp[pos_temp++] = (byte)(((param_lz.offset & 0xF00) >> 4) | ((param_lz.length - 3) & 0x0F));
-
- curr_pos += param_lz.length;
- }
- }
-
- Trace.WriteLineIf(trace.TSwitch.TraceVerbose, string.Format("Header : {0:X02}\n", header));
- Destination.file.WriteByte(header);
- Destination.file.Write(temp, 0, pos_temp);
- pos_temp = 0;
- }
-
- byte[] b_size_in = BitConverter.GetBytes((int)((Destination.file.Length - 8).ToBigEndian32()));
-
- Destination.file.Position = 0;
- Destination.file.Write(b_size_in, 0, 4);
-
- return true;
- }
- catch (Exception ex)
- {
- Trace.WriteLine(string.Format("(EE) {0}", ex.Message));
- return false;
- }
- }
-
- #endregion
- }
- }
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