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25
LZOnDecompress.sln
Normal file
25
LZOnDecompress.sln
Normal file
@ -0,0 +1,25 @@
|
||||
|
||||
Microsoft Visual Studio Solution File, Format Version 12.00
|
||||
# Visual Studio 15
|
||||
VisualStudioVersion = 15.0.27703.2042
|
||||
MinimumVisualStudioVersion = 10.0.40219.1
|
||||
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LZOnDecompress", "LZOnDecompress\LZOnDecompress.csproj", "{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}"
|
||||
EndProject
|
||||
Global
|
||||
GlobalSection(SolutionConfigurationPlatforms) = preSolution
|
||||
Debug|Any CPU = Debug|Any CPU
|
||||
Release|Any CPU = Release|Any CPU
|
||||
EndGlobalSection
|
||||
GlobalSection(ProjectConfigurationPlatforms) = postSolution
|
||||
{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
|
||||
{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
|
||||
{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
|
||||
{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}.Release|Any CPU.Build.0 = Release|Any CPU
|
||||
EndGlobalSection
|
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GlobalSection(SolutionProperties) = preSolution
|
||||
HideSolutionNode = FALSE
|
||||
EndGlobalSection
|
||||
GlobalSection(ExtensibilityGlobals) = postSolution
|
||||
SolutionGuid = {47F5CDE0-BAAB-474B-9E2C-19E21DC1FDEC}
|
||||
EndGlobalSection
|
||||
EndGlobal
|
||||
47
LZOnDecompress/LZOnDecompress.csproj
Normal file
47
LZOnDecompress/LZOnDecompress.csproj
Normal file
@ -0,0 +1,47 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
|
||||
<PropertyGroup>
|
||||
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
|
||||
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
|
||||
<ProjectGuid>{DFF70B93-87D4-4BD7-BC96-3AF6D18D40AB}</ProjectGuid>
|
||||
<OutputType>Exe</OutputType>
|
||||
<RootNamespace>LZOnDecompress</RootNamespace>
|
||||
<AssemblyName>LZOnDecompress</AssemblyName>
|
||||
<TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
|
||||
<FileAlignment>512</FileAlignment>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
|
||||
<PlatformTarget>AnyCPU</PlatformTarget>
|
||||
<DebugSymbols>true</DebugSymbols>
|
||||
<DebugType>full</DebugType>
|
||||
<Optimize>false</Optimize>
|
||||
<OutputPath>bin\Debug\</OutputPath>
|
||||
<DefineConstants>DEBUG;TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
|
||||
<PlatformTarget>AnyCPU</PlatformTarget>
|
||||
<DebugType>none</DebugType>
|
||||
<Optimize>true</Optimize>
|
||||
<OutputPath>bin\Release\</OutputPath>
|
||||
<DefineConstants>TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<ItemGroup>
|
||||
<Reference Include="System" />
|
||||
<Reference Include="System.Core" />
|
||||
<Reference Include="System.Xml.Linq" />
|
||||
<Reference Include="System.Data.DataSetExtensions" />
|
||||
<Reference Include="Microsoft.CSharp" />
|
||||
<Reference Include="System.Data" />
|
||||
<Reference Include="System.Xml" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<Compile Include="Program.cs" />
|
||||
<Compile Include="Properties\AssemblyInfo.cs" />
|
||||
</ItemGroup>
|
||||
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
|
||||
</Project>
|
||||
250
LZOnDecompress/Program.cs
Normal file
250
LZOnDecompress/Program.cs
Normal file
@ -0,0 +1,250 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.IO;
|
||||
using System.Linq;
|
||||
using System.Text;
|
||||
|
||||
namespace LZOnDecompress {
|
||||
class Program {
|
||||
static int Main(string[] args) {
|
||||
bool success = false;
|
||||
|
||||
try {
|
||||
Console.WriteLine("LZOnDecompress v0.1 by Prof. 9");
|
||||
Console.WriteLine();
|
||||
|
||||
if (args.Length != 1) {
|
||||
Console.WriteLine("Usage:");
|
||||
Console.WriteLine(" LZOnDecompress.exe <filename>");
|
||||
#if DEBUG
|
||||
Console.ReadKey();
|
||||
#endif
|
||||
} else {
|
||||
|
||||
MemoryStream input = new MemoryStream();
|
||||
using (FileStream fs = new FileStream(args[0], FileMode.Open, FileAccess.Read, FileShare.Read)) {
|
||||
fs.CopyTo(input);
|
||||
}
|
||||
|
||||
MemoryStream output = new MemoryStream();
|
||||
input.Position = 0;
|
||||
try {
|
||||
success = Decompress(input, output);
|
||||
} catch { }
|
||||
|
||||
if (success) {
|
||||
Console.WriteLine("File decompressed successfully.");
|
||||
string outPath = Path.GetFileNameWithoutExtension(args[0]) + ".srl";
|
||||
output.Position = 0;
|
||||
using (FileStream fs = new FileStream(outPath, FileMode.Create, FileAccess.Write, FileShare.None)) {
|
||||
output.CopyTo(fs);
|
||||
}
|
||||
} else {
|
||||
Console.WriteLine("Could not decompress file.");
|
||||
}
|
||||
}
|
||||
|
||||
Console.WriteLine();
|
||||
Console.WriteLine("Done.");
|
||||
} catch (Exception ex) {
|
||||
Console.WriteLine("FATAL: " + ex.Message);
|
||||
return 2;
|
||||
}
|
||||
#if DEBUG
|
||||
Console.ReadKey(true);
|
||||
#endif
|
||||
|
||||
return success ? 0 : 1;
|
||||
}
|
||||
|
||||
static bool Decompress(MemoryStream input, MemoryStream output) {
|
||||
int state, len, dist, instr;
|
||||
|
||||
try {
|
||||
// Check header magic.
|
||||
if (input.ReadByte() != 'L' ||
|
||||
input.ReadByte() != 'Z' ||
|
||||
input.ReadByte() != 'O' ||
|
||||
input.ReadByte() != 'n' ||
|
||||
input.ReadByte() != 0x00 ||
|
||||
input.ReadByte() != 0x2F ||
|
||||
input.ReadByte() != 0xF1 ||
|
||||
input.ReadByte() != 0x71) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Read sizes.
|
||||
uint decompressedSize = InputRead32();
|
||||
uint compressedSize = InputRead32() + 17;
|
||||
bool hasInstr = false;
|
||||
state = -1;
|
||||
|
||||
// Process first byte.
|
||||
instr = InputRead8();
|
||||
if (instr > 17) {
|
||||
len = instr - 17;
|
||||
InputCopy();
|
||||
state = Math.Min(instr - 17, 4);
|
||||
} else {
|
||||
hasInstr = true;
|
||||
}
|
||||
|
||||
while (true) {
|
||||
if (input.Position >= compressedSize) {
|
||||
return false;
|
||||
}
|
||||
if (!hasInstr) {
|
||||
instr = InputRead8();
|
||||
}
|
||||
hasInstr = false;
|
||||
|
||||
if (instr <= 0xF) {
|
||||
switch (state) {
|
||||
case 0:
|
||||
len = ReadLen(0, 4) + 3;
|
||||
state = 4;
|
||||
InputCopy();
|
||||
break;
|
||||
case 1:
|
||||
case 2:
|
||||
case 3:
|
||||
len = 2;
|
||||
dist = ReadOper(2, 2) + 1 + (InputRead8() << 2);
|
||||
state = ReadOper(0, 2);
|
||||
DictionaryCopy();
|
||||
break;
|
||||
case 4:
|
||||
len = 3;
|
||||
dist = ReadOper(2, 2) + 2049 + (InputRead8() << 2);
|
||||
state = ReadOper(0, 2);
|
||||
DictionaryCopy();
|
||||
break;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
} else if (instr <= 0x1F) {
|
||||
len = ReadLen(0, 3) + 2;
|
||||
int x = InputRead16();
|
||||
dist = (ReadOper(3, 1) << 14) + 16384 + (x >> 2);
|
||||
if (dist == 16384) {
|
||||
break;
|
||||
}
|
||||
state = x & 0b11;
|
||||
DictionaryCopy();
|
||||
} else if (instr <= 0x3F) {
|
||||
len = ReadLen(0, 5) + 2;
|
||||
int x = InputRead16();
|
||||
dist = 1 + (x >> 2);
|
||||
state = x & 0b11;
|
||||
DictionaryCopy();
|
||||
} else if (instr <= 0x7F) {
|
||||
len = ReadOper(5, 1) + 3;
|
||||
int x = InputRead8();
|
||||
dist = ReadOper(2, 3) + 1 + (x << 3);
|
||||
state = ReadOper(0, 2);
|
||||
DictionaryCopy();
|
||||
} else {
|
||||
len = ReadOper(5, 2) + 5;
|
||||
dist = ReadOper(2, 3) + 1 + (InputRead8() << 3);
|
||||
state = ReadOper(0, 2);
|
||||
DictionaryCopy();
|
||||
}
|
||||
|
||||
if (state < 4) {
|
||||
len = state;
|
||||
InputCopy();
|
||||
}
|
||||
}
|
||||
|
||||
while (output.Length < decompressedSize) {
|
||||
output.WriteByte(0);
|
||||
}
|
||||
} catch (EndOfStreamException) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
|
||||
byte InputRead8() {
|
||||
int b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
return (byte)b;
|
||||
}
|
||||
|
||||
ushort InputRead16() {
|
||||
ushort r = 0;
|
||||
|
||||
int b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (ushort)b;
|
||||
|
||||
b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (ushort)(b << 8);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
uint InputRead32() {
|
||||
uint r = 0;
|
||||
|
||||
int b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (uint)(b << 24);
|
||||
|
||||
b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (uint)(b << 16);
|
||||
|
||||
b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (uint)(b << 8);
|
||||
|
||||
b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += (uint)b;
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int ReadOper(int shift, int bits) {
|
||||
return (instr >> shift) & ((1 << bits) - 1);
|
||||
}
|
||||
|
||||
int ReadLen(int shift, int bits) {
|
||||
int mask = (1 << bits) - 1;
|
||||
int r = (instr >> shift) & mask;
|
||||
if (r == 0) {
|
||||
r = mask;
|
||||
int b;
|
||||
while ((b = input.ReadByte()) == 0) {
|
||||
r += 255;
|
||||
}
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
r += b;
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
void InputCopy() {
|
||||
int b;
|
||||
while (len-- > 0) {
|
||||
b = input.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
output.WriteByte((byte)b);
|
||||
}
|
||||
}
|
||||
|
||||
void DictionaryCopy() {
|
||||
int b;
|
||||
while (len-- > 0) {
|
||||
output.Position -= dist;
|
||||
b = output.ReadByte();
|
||||
if (b < 0) throw new EndOfStreamException();
|
||||
output.Position += dist - 1;
|
||||
output.WriteByte((byte)b);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
36
LZOnDecompress/Properties/AssemblyInfo.cs
Normal file
36
LZOnDecompress/Properties/AssemblyInfo.cs
Normal file
@ -0,0 +1,36 @@
|
||||
using System.Reflection;
|
||||
using System.Runtime.CompilerServices;
|
||||
using System.Runtime.InteropServices;
|
||||
|
||||
// General Information about an assembly is controlled through the following
|
||||
// set of attributes. Change these attribute values to modify the information
|
||||
// associated with an assembly.
|
||||
[assembly: AssemblyTitle("LZOnDecompress")]
|
||||
[assembly: AssemblyDescription("")]
|
||||
[assembly: AssemblyConfiguration("")]
|
||||
[assembly: AssemblyCompany("")]
|
||||
[assembly: AssemblyProduct("LZOnDecompress")]
|
||||
[assembly: AssemblyCopyright("Copyright © Prof. 9 2018")]
|
||||
[assembly: AssemblyTrademark("")]
|
||||
[assembly: AssemblyCulture("")]
|
||||
|
||||
// Setting ComVisible to false makes the types in this assembly not visible
|
||||
// to COM components. If you need to access a type in this assembly from
|
||||
// COM, set the ComVisible attribute to true on that type.
|
||||
[assembly: ComVisible(false)]
|
||||
|
||||
// The following GUID is for the ID of the typelib if this project is exposed to COM
|
||||
[assembly: Guid("dff70b93-87d4-4bd7-bc96-3af6d18d40ab")]
|
||||
|
||||
// Version information for an assembly consists of the following four values:
|
||||
//
|
||||
// Major Version
|
||||
// Minor Version
|
||||
// Build Number
|
||||
// Revision
|
||||
//
|
||||
// You can specify all the values or you can default the Build and Revision Numbers
|
||||
// by using the '*' as shown below:
|
||||
// [assembly: AssemblyVersion("1.0.*")]
|
||||
[assembly: AssemblyVersion("1.0.0.0")]
|
||||
[assembly: AssemblyFileVersion("1.0.0.0")]
|
||||
25
readme.md
Normal file
25
readme.md
Normal file
@ -0,0 +1,25 @@
|
||||
# LZOnDecompress
|
||||
|
||||
Quick and dirty LZOn decompressor. LZOn is the format used for compressed multiboot files in DS Download Station ROMs.
|
||||
|
||||
Usage:
|
||||
|
||||
```
|
||||
LZOnDecompress.exe <filename>
|
||||
```
|
||||
|
||||
Produces filename.nds in the working directory.
|
||||
|
||||
**NO SUPPORT PROVIDED.** Feel free to report bugs though.
|
||||
|
||||
## LZOn reference
|
||||
|
||||
```
|
||||
0x00: Magic "LZOn"
|
||||
0x04: Magic 0x00,0x2F,0xF1,0x71 (presumably)
|
||||
0x08: Size of decompressed file (32-bit, big endian)
|
||||
0x0C: Size of compressed file minus 0x11 (32-bit big endian)
|
||||
0x10: LZO compressed data stream (follows https://www.kernel.org/doc/Documentation/lzo.txt). Note that 16-bit values in the LZO stream are little endian.
|
||||
```
|
||||
|
||||
Output generated by decompressing the LZO data stream and then padding to the decompressed file size specified in the header with 0x00 bytes.
|
||||
Loading…
Reference in New Issue
Block a user