1// Copyright 2019 The Wuffs Authors. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// https://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// ---------------- 16 17// +build !cgo 18 19package cgozstd 20 21// This file contains placeholder types and funcs so that the package still 22// builds (with the same API) when CGO_ENABLED=0. The package doesn't work 23// without cgo, but it will fail at run time, not compile time. 24// 25// In particular, the build stays green regardless of whether CGO_ENABLED is on 26// or off. Installing and testing every package in the whole repository will 27// not fail. The tests in this package don't pass, but they are skipped. 28 29import ( 30 "errors" 31 "io" 32 33 "github.com/google/wuffs/lib/compression" 34) 35 36const cgoEnabled = false 37 38var ( 39 errCgoIsNotEnabled = errors.New("cgozstd: cgo is not enabled") 40) 41 42type ReaderRecycler struct{} 43 44func (c *ReaderRecycler) Bind(*Reader) {} 45func (c *ReaderRecycler) Close() error { return errCgoIsNotEnabled } 46 47type Reader struct{} 48 49func (r *Reader) Close() error { return errCgoIsNotEnabled } 50func (r *Reader) Read([]byte) (int, error) { return 0, errCgoIsNotEnabled } 51func (r *Reader) Reset(io.Reader, []byte) error { return errCgoIsNotEnabled } 52 53type WriterRecycler struct{} 54 55func (c *WriterRecycler) Bind(*Writer) {} 56func (c *WriterRecycler) Close() error { return errCgoIsNotEnabled } 57 58type Writer struct{} 59 60func (w *Writer) Close() error { return errCgoIsNotEnabled } 61func (w *Writer) Reset(io.Writer, []byte, compression.Level) error { return errCgoIsNotEnabled } 62func (w *Writer) Write([]byte) (int, error) { return 0, errCgoIsNotEnabled } 63