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67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
package util
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import "encoding/binary"
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// big endian
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func BytesToUint64Old(b []byte) (v uint64) {
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length := uint(len(b))
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for i := uint(0); i < length-1; i++ {
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v += uint64(b[i])
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v <<= 8
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}
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v += uint64(b[length-1])
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return
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}
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func BytesToUint32Old(b []byte) (v uint32) {
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length := uint(len(b))
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for i := uint(0); i < length-1; i++ {
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v += uint32(b[i])
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v <<= 8
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}
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v += uint32(b[length-1])
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return
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}
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func BytesToUint16Old(b []byte) (v uint16) {
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v += uint16(b[0])
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v <<= 8
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v += uint16(b[1])
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return
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}
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func Uint64toBytesOld(b []byte, v uint64) {
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for i := uint(0); i < 8; i++ {
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b[7-i] = byte(v >> (i * 8))
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}
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}
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func Uint32toBytesOld(b []byte, v uint32) {
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for i := uint(0); i < 4; i++ {
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b[3-i] = byte(v >> (i * 8))
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}
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}
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func Uint16toBytesOld(b []byte, v uint16) {
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b[0] = byte(v >> 8)
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b[1] = byte(v)
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}
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func BytesToUint64(b []byte) (v uint64) {
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return binary.BigEndian.Uint64(b)
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}
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func BytesToUint32(b []byte) (v uint32) {
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return binary.BigEndian.Uint32(b)
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}
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func BytesToUint16(b []byte) (v uint16) {
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return binary.BigEndian.Uint16(b)
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}
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func Uint64toBytes(b []byte, v uint64) {
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binary.BigEndian.PutUint64(b, v)
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}
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func Uint32toBytes(b []byte, v uint32) {
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binary.BigEndian.PutUint32(b, v)
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}
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func Uint16toBytes(b []byte, v uint16) {
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binary.BigEndian.PutUint16(b, v)
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}
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func Uint8toBytes(b []byte, v uint8) {
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b[0] = byte(v)
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}
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