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| author | BiSaXa <1669855+BiSaXa@users.noreply.github.com> | 2022-09-04 11:08:23 +0300 |
|---|---|---|
| committer | BiSaXa <1669855+BiSaXa@users.noreply.github.com> | 2022-09-04 11:08:23 +0300 |
| commit | 74ed90d288238c704395c3912a47db916d151298 (patch) | |
| tree | 2aa452af4c57ae0fabcf65aac72782e2399c7e23 /bitreader.go | |
| parent | init - first full version (diff) | |
| download | bitreader-74ed90d288238c704395c3912a47db916d151298.tar.gz bitreader-74ed90d288238c704395c3912a47db916d151298.tar.bz2 bitreader-74ed90d288238c704395c3912a47db916d151298.zip | |
specify little endian, easier reader construct
Diffstat (limited to 'bitreader.go')
| -rw-r--r-- | bitreader.go | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/bitreader.go b/bitreader.go index 9d9a273..b105df7 100644 --- a/bitreader.go +++ b/bitreader.go | |||
| @@ -8,31 +8,24 @@ import ( | |||
| 8 | ) | 8 | ) |
| 9 | 9 | ||
| 10 | type ReaderType struct { | 10 | type ReaderType struct { |
| 11 | data []byte | 11 | data []byte // Reader data from a byte array |
| 12 | base int | 12 | base int // Current reader byte location |
| 13 | index int | 13 | index int // Current reader index |
| 14 | lsb bool | 14 | le bool // Little endian or big endian? |
| 15 | } | 15 | } |
| 16 | 16 | ||
| 17 | func Reader(data []byte) *ReaderType { | 17 | func Reader(data []byte, le bool) *ReaderType { |
| 18 | return &ReaderType{ | 18 | dataClone := data |
| 19 | data: data, | 19 | if le { |
| 20 | base: 0, | 20 | for index, byteValue := range data { |
| 21 | index: 0, | 21 | dataClone[index] = bits.Reverse8(byteValue) |
| 22 | lsb: false, | 22 | } |
| 23 | } | ||
| 24 | } | ||
| 25 | |||
| 26 | func ReaderLSB(data []byte) *ReaderType { | ||
| 27 | dataReversed := data | ||
| 28 | for index, byteValue := range data { | ||
| 29 | dataReversed[index] = bits.Reverse8(byteValue) | ||
| 30 | } | 23 | } |
| 31 | return &ReaderType{ | 24 | return &ReaderType{ |
| 32 | data: dataReversed, | 25 | data: dataClone, |
| 33 | base: 0, | 26 | base: 0, |
| 34 | index: 0, | 27 | index: 0, |
| 35 | lsb: true, | 28 | le: le, |
| 36 | } | 29 | } |
| 37 | } | 30 | } |
| 38 | 31 | ||
| @@ -60,7 +53,7 @@ func (reader *ReaderType) ReadBits32(bits int) (int, error) { | |||
| 60 | if err != nil { | 53 | if err != nil { |
| 61 | return -1, err | 54 | return -1, err |
| 62 | } | 55 | } |
| 63 | if reader.lsb { | 56 | if reader.le { |
| 64 | var output string | 57 | var output string |
| 65 | // Go to last bit and read backwards from there | 58 | // Go to last bit and read backwards from there |
| 66 | reader.base += bits / 8 | 59 | reader.base += bits / 8 |