gitea/vendor/github.com/dsnet/compress/bzip2/fuzz_on.go
PhilippHomann 684b7a999f
Dump: add output format tar and output to stdout (#10376)
* Dump: Use mholt/archive/v3 to support tar including many compressions

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Allow dump output to stdout

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Fixed bug present since #6677 where SessionConfig.Provider is never "file"

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never pack RepoRootPath, LFS.ContentPath and LogRootPath when they are below AppDataPath

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: also dump LFS (fixes #10058)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never dump CustomPath if CustomPath is a subdir of or equal to AppDataPath (fixes #10365)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Use log.Info instead of fmt.Fprintf

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* import ordering

* make fmt

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Matti R <matti@mdranta.net>
2020-06-05 16:47:39 -04:00

78 lines
1.8 KiB
Go

// Copyright 2016, Joe Tsai. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE.md file.
// +build gofuzz
// This file exists to export internal implementation details for fuzz testing.
package bzip2
func ForwardBWT(buf []byte) (ptr int) {
var bwt burrowsWheelerTransform
return bwt.Encode(buf)
}
func ReverseBWT(buf []byte, ptr int) {
var bwt burrowsWheelerTransform
bwt.Decode(buf, ptr)
}
type fuzzReader struct {
Checksums Checksums
}
// updateChecksum updates Checksums.
//
// If a valid pos is provided, it appends the (pos, val) pair to the slice.
// Otherwise, it will update the last record with the new value.
func (fr *fuzzReader) updateChecksum(pos int64, val uint32) {
if pos >= 0 {
fr.Checksums = append(fr.Checksums, Checksum{pos, val})
} else {
fr.Checksums[len(fr.Checksums)-1].Value = val
}
}
type Checksum struct {
Offset int64 // Bit offset of the checksum
Value uint32 // Checksum value
}
type Checksums []Checksum
// Apply overwrites all checksum fields in d with the ones in cs.
func (cs Checksums) Apply(d []byte) []byte {
d = append([]byte(nil), d...)
for _, c := range cs {
setU32(d, c.Offset, c.Value)
}
return d
}
func setU32(d []byte, pos int64, val uint32) {
for i := uint(0); i < 32; i++ {
bpos := uint64(pos) + uint64(i)
d[bpos/8] &= ^byte(1 << (7 - bpos%8))
d[bpos/8] |= byte(val>>(31-i)) << (7 - bpos%8)
}
}
// Verify checks that all checksum fields in d matches those in cs.
func (cs Checksums) Verify(d []byte) bool {
for _, c := range cs {
if getU32(d, c.Offset) != c.Value {
return false
}
}
return true
}
func getU32(d []byte, pos int64) (val uint32) {
for i := uint(0); i < 32; i++ {
bpos := uint64(pos) + uint64(i)
val |= (uint32(d[bpos/8] >> (7 - bpos%8))) << (31 - i)
}
return val
}