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compress: Improve RingBuffer usage

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This commit is contained in:
joadnacer 2023-10-21 19:20:12 +01:00
parent 7f9e0f1c56
commit a8eb70c9d7
2 changed files with 4 additions and 8 deletions
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4
lib/std/compress/zstandard.zig
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@ -219,9 +219,7 @@ pub fn DecompressStream(
}
const size = @min(self.buffer.len(), buffer.len);
for (0..size) |i| {
buffer[i] = self.buffer.read().?;
}
self.buffer.readFirstAssumeLength(buffer, size);
if (self.state == .LastBlock and self.buffer.len() == 0) {
self.state = .NewFrame;
self.allocator.free(self.literal_fse_buffer);

8
lib/std/compress/zstandard/decode/block.zig
View File

@ -311,8 +311,8 @@ pub const DecodeState = struct {
try self.decodeLiteralsRingBuffer(dest, sequence.literal_length);
const copy_start = dest.write_index + dest.data.len - sequence.offset;
const copy_slice = dest.sliceAt(copy_start, sequence.match_length);
for (copy_slice.first) |b| dest.writeAssumeCapacity(b);
for (copy_slice.second) |b| dest.writeAssumeCapacity(b);
dest.writeSliceForwardsAssumeCapacity(copy_slice.first);
dest.writeSliceForwardsAssumeCapacity(copy_slice.second);
self.written_count += sequence.match_length;
}
@ -723,9 +723,7 @@ pub fn decodeBlockRingBuffer(
},
.rle => {
if (src.len < 1) return error.MalformedRleBlock;
for (0..block_size) |_| {
dest.writeAssumeCapacity(src[0]);
}
dest.writeSliceAssumeCapacity(src[0..block_size]);
consumed_count.* += 1;
decode_state.written_count += block_size;
return block_size;