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Zanzarah: Fix unpacking (fixes #25) #35

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Merged
refaim merged 1 commit into from
May 24, 2025
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Zanzarah: Fix unpacking (fixes #25) #35

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11 changes: 3 additions & 8 deletions src/modules/zanzarah/zanzarah.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -65,17 +65,12 @@ namespace extractor
const auto block_offset = read_positive_or_zero_int32(stream);
const auto block_size = read_positive_int32(stream);

[[maybe_unused]] constexpr int32_t data_block_footer = 0x202;
[[maybe_unused]] constexpr int32_t data_block_header = 0x101;
constexpr int32_t header_size = sizeof(data_block_header);
constexpr int32_t footer_size = sizeof(data_block_footer);
constexpr int32_t attr_size = 4;

auto new_file = std::make_unique<file>();
new_file->path = path;
new_file->offset = block_offset + header_size;
// [0x101, data, 0x202], [0x101, data, 0x202], ...
// No idea why we should subtract next data block header, but apparently that's the right way
new_file->compressed_body_size_in_bytes = block_size - 2 * header_size - footer_size;
new_file->offset = block_offset + attr_size;
new_file->compressed_body_size_in_bytes = block_size - attr_size;
new_file->uncompressed_body_size_in_bytes = new_file->compressed_body_size_in_bytes;

files.push_back(std::move(new_file));
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