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implement a WriteUintN function

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This commit is contained in:
Marten Seemann
2018-11-26 16:58:11 +07:00
parent faed2ba30a
commit 52380835b9
3 changed files with 35 additions and 0 deletions
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6
internal/utils/byteorder_big_endian.go
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@@ -57,6 +57,12 @@ func (bigEndian) ReadUint16(b io.ByteReader) (uint16, error) {
return uint16(b1) + uint16(b2)<<8, nil
}
func (bigEndian) WriteUintN(b *bytes.Buffer, length uint8, i uint64) {
for j := length; j > 0; j-- {
b.WriteByte(uint8(i >> (8 * (j - 1))))
}
}
// WriteUint32 writes a uint32
func (bigEndian) WriteUint32(b *bytes.Buffer, i uint32) {
b.Write([]byte{uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i)})