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pbz.hexpat
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pbz.hexpat
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// Apple pbz compressed file
// Used by Apple on .xip files and OTA updates,
// and can be created with macOS compression_tool.
//
// Copyright (c) 2023 Nicolás Alvarez <nicolas.alvarez@gmail.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma author Nicolás Alvarez
#pragma description Apple pbz
import std.mem;
import type.magic;
#pragma endian big
#define SHOW_DATA 0
enum CompressionType: char {
ZLIB = 'z',
LZMA = 'x',
LZ4 = '4',
LZFSE = 'e'
};
struct Chunk {
u64 uncompressed_size;
u64 compressed_size;
if (SHOW_DATA) {
u8 data[compressed_size] [[sealed]];
} else {
padding[compressed_size];
}
};
struct PBZ {
type::Magic<"pbz"> magic;
CompressionType compression;
u64 chunk_size;
Chunk chunks[while(!std::mem::eof())];
};
PBZ pbz @ 0;