69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
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package binary
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import (
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"encoding/binary"
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"fmt"
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"strconv"
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"strings"
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)
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// StrToBytes converts string("00 00 00 00 00 00 00 00") to []byte
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func StrToBytes(str string) []byte {
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bytes := make([]byte, 8)
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for i, e := range strings.Fields(str) {
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b, _ := strconv.ParseUint(e, 16, 64)
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bytes[i] = byte(b)
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}
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return bytes
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}
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// BytesToStr converts []byte to string("00 00 00 00 00 00 00 00")
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func BytesToStr(bytes ...byte) string {
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strs := []string{}
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for _, b := range bytes {
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strs = append(strs, fmt.Sprintf("%02x", b))
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}
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return strings.Join(strs, " ")
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}
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// BytesToUInt converts []byte to uint64
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func BytesToUInt(bytes ...byte) uint64 {
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padding := make([]byte, 8-len(bytes))
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i := binary.BigEndian.Uint64(append(padding, bytes...))
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return i
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}
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// UintToBytes converts uint64 to []byte
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func UintToBytes(i uint64, size int) []byte {
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bytes := make([]byte, 8)
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binary.BigEndian.PutUint64(bytes, i)
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return bytes[8-size : 8]
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}
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// BytesToInt converts []byte to int64
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func BytesToInt(bytes ...byte) int64 {
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if 0x7f < bytes[0] {
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mask := uint64(1<<uint(len(bytes)*8-1) - 1)
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bytes[0] &= 0x7f
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i := BytesToUInt(bytes...)
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i = (^i + 1) & mask
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return int64(-i)
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} else {
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i := BytesToUInt(bytes...)
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return int64(i)
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}
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}
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// IntToBytes converts int to []byte
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func IntToBytes(i int, size int) []byte {
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var ui uint64
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if 0 < i {
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ui = uint64(i)
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} else {
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ui = (^uint64(-i) + 1)
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}
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return UintToBytes(ui, size)
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}
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