mirror of
https://github.com/cwinfo/matterbridge.git
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98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
package bytehelper
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import (
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"errors"
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)
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// SliceToArray will convert byte slice to a 32 byte array
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func SliceToArray(bytes []byte) [32]byte {
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var byteArray [32]byte
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copy(byteArray[:], bytes)
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return byteArray
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}
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// SliceToArray64 will convert byte slice to a 64 byte array
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func SliceToArray64(bytes []byte) [64]byte {
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var byteArray [64]byte
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copy(byteArray[:], bytes)
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return byteArray
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}
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// ArrayToSlice will convert a 32 byte array to byte slice
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func ArrayToSlice(bytes [32]byte) []byte {
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return bytes[:]
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}
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// ArrayToSlice64 will convert a 64 byte array to byte slice
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func ArrayToSlice64(bytes [64]byte) []byte {
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return bytes[:]
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}
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// Split will take the given byte array and split it into half,
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// with the first half being "firstLength" in size and the second
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// half "secondLength" in size.
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func Split(input []byte, firstLength, secondLength int) [][]byte {
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parts := make([][]byte, 2)
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parts[0] = make([]byte, firstLength)
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copy(parts[0], input[:firstLength])
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parts[1] = make([]byte, secondLength)
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copy(parts[1], input[firstLength:])
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return parts
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}
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// SplitThree will take the given byte array and split it into thirds,
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// with the first third being "firstLength" in size, the second third
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// being "secondLength" in size, and the last third being "thirdLength"
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// in size.
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func SplitThree(input []byte, firstLength, secondLength, thirdLength int) ([][]byte, error) {
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if input == nil || firstLength < 0 || secondLength < 0 || thirdLength < 0 ||
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len(input) < firstLength+secondLength+thirdLength {
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return nil, errors.New("Input too small: " + string(input))
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}
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parts := make([][]byte, 3)
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parts[0] = make([]byte, firstLength)
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copy(parts[0], input[:firstLength])
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parts[1] = make([]byte, secondLength)
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copy(parts[1], input[firstLength:][:secondLength])
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parts[2] = make([]byte, thirdLength)
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copy(parts[2], input[firstLength+secondLength:])
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return parts, nil
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}
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// Trim will trim the given byte array to the given length.
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func Trim(input []byte, length int) []byte {
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result := make([]byte, length)
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copy(result, input[:length])
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return result
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}
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// Bytes5ToInt64 will convert the given byte array and offset to an int64.
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func Bytes5ToInt64(bytes []byte, offset int) int64 {
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value := (int64(bytes[offset]&0xff) << 32) |
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(int64(bytes[offset+1]&0xff) << 24) |
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(int64(bytes[offset+2]&0xff) << 16) |
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(int64(bytes[offset+3]&0xff) << 8) |
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int64(bytes[offset+4]&0xff)
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return value
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}
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// CopySlice returns a copy of the given bytes.
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func CopySlice(bytes []byte) []byte {
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cp := make([]byte, len(bytes))
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copy(cp, bytes)
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return cp
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}
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