| // Copyright 2019 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| // SPDX-License-Identifier: Apache-2.0 OR MIT |
| |
| //go:build !cgo |
| // +build !cgo |
| |
| package raczlib |
| |
| import ( |
| "compress/zlib" |
| "io" |
| |
| "github.com/google/wuffs/lib/compression" |
| ) |
| |
| func (r *CodecReader) makeDecompressor(compressed io.Reader, dict []byte) (io.Reader, error) { |
| if r.cachedReader != nil { |
| if err := r.cachedReader.Reset(compressed, dict); err != nil { |
| return nil, err |
| } |
| return r.cachedReader, nil |
| } |
| |
| zlibReader, err := zlib.NewReaderDict(compressed, dict) |
| if err != nil { |
| return nil, err |
| } |
| r.cachedReader = zlibReader.(compression.Reader) |
| return zlibReader, nil |
| } |
