Caleb Gardner
7c4089f826
Implemented new decompression cache to prevent decompressing the same block multiple times
41 lines
1.4 KiB
Zig
41 lines
1.4 KiB
Zig
const std = @import("std");
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const Reader = std.Io.Reader;
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const flate = std.compress.flate;
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const zstd = std.compress.zstd;
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const xz = std.compress.xz;
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const lzma = std.compress.lzma;
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const Error = @import("decompress.zig").DecompressionError;
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pub fn zlibDecompress(_: std.mem.Allocator, in: []u8, out: []u8) Error!usize {
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var buf: [flate.max_window_len]u8 = undefined;
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var rdr: Reader = .fixed(in);
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var decomp: flate.Decompress = .init(&rdr, .zlib, &buf);
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return decomp.reader.readSliceShort(out);
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}
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pub fn zstdDecompress(alloc: std.mem.Allocator, in: []u8, out: []u8) Error!usize {
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const buf = try alloc.alloc(u8, in.len + zstd.block_size_max);
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defer alloc.free(buf);
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var rdr: Reader = .fixed(in);
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var decomp: zstd.Decompress = .init(&rdr, buf, .{ .window_len = in.len });
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return decomp.reader.readSliceShort(out);
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}
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pub fn lzmaDecompress(alloc: std.mem.Allocator, in: []u8, out: []u8) Error!usize {
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var rdr: Reader = .fixed(in);
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var decomp: lzma.Decompress = .initOptions(&rdr, alloc, &[0]u8{}, .{}, 2 * out.len);
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defer decomp.deinit();
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return decomp.reader.readSliceShort(out);
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}
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pub fn xzDecompress(alloc: std.mem.Allocator, in: []u8, out: []u8) Error!usize {
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var rdr: Reader = .fixed(in);
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var decomp: xz.Decompress = .init(&rdr, alloc, &[0]u8{});
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defer decomp.deinit();
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return decomp.reader.readSliceShort(out);
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}
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