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This commit is contained in:
Sascha L. Teichmann 2016-04-13 11:12:07 +02:00
commit 0030f7bc02
3 changed files with 26 additions and 1 deletions
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7
common/block.go
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@ -137,7 +137,12 @@ func NewDecodedBlock(data []byte, colors *Colors) (db *DecodedBlock, err error)
return
}
offset += buf.Pos + 4
// There is a bug before Go 1.7 that enforces
// to add 4 as an offset after the compressed
// geometry data. This is resolved via build tags
// and definitions in pre17offset.go and
// post17offset.go.
offset += buf.Pos + afterCompressOfs
buf.Pos = 0
if offset >= dataLen {
return nil, ErrBlockTruncated

10
common/post17offset.go Normal file
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@ -0,0 +1,10 @@
// Copyright 2016 by Sascha L. Teichmann
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.
// +build go1.7
package common
// afterCompressOfs is not necessary after Go 1.7.
const afterCompressOfs = 0

10
common/pre17offset.go Normal file
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@ -0,0 +1,10 @@
// Copyright 2016 by Sascha L. Teichmann
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.
// +build !go1.7
package common
// afterCompressOfs is necessary before Go 1.7.
const afterCompressOfs = 4