SarcLibrary 2.0.1

SarcLibrary

Nintendo SEAD Archive Library | Based on oead/sarc by Léo Lam

SarcLibrary has been tested to parse and re-write (almost) every SARC file found in Breath of the Wild byte-perfectly.

Usage

Reading a Sarc File

// Read from File Path
SarcFile sarc = SarcFile.FromBinary("content/Pack/Bootup.pack");

// Read from a byte[]
// Do not use with File.ReadAllBytes(), use
// a Stream instead.
SarcFile sarc = SarcFile.FromBinary("content/Pack/Bootup.pack");
byte[] decompressedData = Yaz0.Decompress(sarc["GameData/gamedata.ssarc"]);
SarcFile nestedSarc = SarcFile.FromBinary(decompressedData);

// Read from a Stream
using FileStream fs = File.OpenRead("content/Pack/Bootup.pack");
SarcFile sarc = new(fs);

Writing a Sarc File

// Write to a File
sarc.ToBinary("content/Pack/Bootup.pack");

// Write to a byte[]
byte[] data = sarc.ToBinary();

// Write to a Stream
using MemoryStream ms = new();
sarc.ToBinary(ms);

Sarc Tools

// Extract to a Directory
await sarc.ExtractTodirectory("path/to/output");

// Load from a Directory
SarcFile sarc = SarcFile.LoadFromDirectory("path/to/input", searchPattern: "*.*", searchOption: SearchOption.AllDirectories)

Benchmarks

Benchmarks run on an AMD Ryzen 7 3700X CPU, 64GB (4 x 16GB) of VENGEANCE® DDR4 DRAM 3200MHz C16 memory, and a Kingston KC3000 PCIe 4.0 NVMe M.2 SSD

Byte-Perfect Exceptions

Exceptions to every file being parsed and re-written byte-perfectly are a the sbeventpack archives in content/Event, which seems to use a mix of alignments. During tests, I found offsets of 0x100 and 0x8 that had varying reliability.<br> These odd occurrences are also ignored in oead/sarc. Luckily, the game does not seem to care if these files are aligned to 4-bytes, so the error is not detrimental (at least not in BOTW).

Install

NuGet

Install-Package SarcLibrary

Build From Source

git clone https://github.com/NCF-Library/SarcLibrary.git
dotnet build SarcLibrary

Credit

• ArchLeaders: Optimized C# SARC implementation based on oead by Léo Lam
• exelix: Original C# SARC implementation
• Léo Lam: C++ SARC implementation