Mercurial > gemma
view pkg/misc/encode.go @ 1073:7845c599f4c9
feat: zoombuttons
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Fri, 26 Oct 2018 12:53:52 +0200 |
parents | a244b18cb916 |
children | 5b9b8eabcd01 |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package misc import ( "encoding/binary" "io" ) type BinReader struct { io.Reader Err error } func (r *BinReader) Read(buf []byte) (int, error) { if r.Err != nil { return 0, r.Err } var n int n, r.Err = r.Read(buf) return n, r.Err } func (r *BinReader) ReadBin(x interface{}) { if r.Err == nil { r.Err = binary.Read(r.Reader, binary.BigEndian, x) } } func (r *BinReader) ReadString(s *string) { if r.Err != nil { return } var l uint32 if r.Err = binary.Read(r.Reader, binary.BigEndian, &l); r.Err != nil { return } b := make([]byte, l) if r.Err = binary.Read(r.Reader, binary.BigEndian, b); r.Err != nil { return } *s = string(b) } type BinWriter struct { io.Writer Err error } func (w *BinWriter) Write(buf []byte) (int, error) { if w.Err != nil { return 0, w.Err } var n int n, w.Err = w.Writer.Write(buf) return n, w.Err } func (w *BinWriter) WriteBin(x interface{}) { if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, x) } } func (w *BinWriter) WriteString(s string) { if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, uint32(len(s))) } if w.Err == nil { w.Err = binary.Write(w.Writer, binary.BigEndian, []byte(s)) } }