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integers.go
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integers.go
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package msgp
/* ----------------------------------
integer encoding utilities
(inline-able)
TODO(tinylib): there are faster,
albeit non-portable solutions
to the code below. implement
byteswap?
---------------------------------- */
func putMint64(b []byte, i int64) {
b[0] = mint64
b[1] = byte(i >> 56)
b[2] = byte(i >> 48)
b[3] = byte(i >> 40)
b[4] = byte(i >> 32)
b[5] = byte(i >> 24)
b[6] = byte(i >> 16)
b[7] = byte(i >> 8)
b[8] = byte(i)
}
func getMint64(b []byte) int64 {
return (int64(b[1]) << 56) | (int64(b[2]) << 48) |
(int64(b[3]) << 40) | (int64(b[4]) << 32) |
(int64(b[5]) << 24) | (int64(b[6]) << 16) |
(int64(b[7]) << 8) | (int64(b[8]))
}
func putMint32(b []byte, i int32) {
b[0] = mint32
b[1] = byte(i >> 24)
b[2] = byte(i >> 16)
b[3] = byte(i >> 8)
b[4] = byte(i)
}
func getMint32(b []byte) int32 {
return (int32(b[1]) << 24) | (int32(b[2]) << 16) | (int32(b[3]) << 8) | (int32(b[4]))
}
func putMint16(b []byte, i int16) {
b[0] = mint16
b[1] = byte(i >> 8)
b[2] = byte(i)
}
func getMint16(b []byte) (i int16) {
return (int16(b[1]) << 8) | int16(b[2])
}
func putMint8(b []byte, i int8) {
b[0] = mint8
b[1] = byte(i)
}
func getMint8(b []byte) (i int8) {
return int8(b[1])
}
func putMuint64(b []byte, u uint64) {
b[0] = muint64
b[1] = byte(u >> 56)
b[2] = byte(u >> 48)
b[3] = byte(u >> 40)
b[4] = byte(u >> 32)
b[5] = byte(u >> 24)
b[6] = byte(u >> 16)
b[7] = byte(u >> 8)
b[8] = byte(u)
}
func getMuint64(b []byte) uint64 {
return (uint64(b[1]) << 56) | (uint64(b[2]) << 48) |
(uint64(b[3]) << 40) | (uint64(b[4]) << 32) |
(uint64(b[5]) << 24) | (uint64(b[6]) << 16) |
(uint64(b[7]) << 8) | (uint64(b[8]))
}
func putMuint32(b []byte, u uint32) {
b[0] = muint32
b[1] = byte(u >> 24)
b[2] = byte(u >> 16)
b[3] = byte(u >> 8)
b[4] = byte(u)
}
func getMuint32(b []byte) uint32 {
return (uint32(b[1]) << 24) | (uint32(b[2]) << 16) | (uint32(b[3]) << 8) | (uint32(b[4]))
}
func putMuint16(b []byte, u uint16) {
b[0] = muint16
b[1] = byte(u >> 8)
b[2] = byte(u)
}
func getMuint16(b []byte) uint16 {
return (uint16(b[1]) << 8) | uint16(b[2])
}
func putMuint8(b []byte, u uint8) {
b[0] = muint8
b[1] = byte(u)
}
func getMuint8(b []byte) uint8 {
return uint8(b[1])
}
func getUnix(b []byte) (sec int64, nsec int32) {
sec = (int64(b[0]) << 56) | (int64(b[1]) << 48) |
(int64(b[2]) << 40) | (int64(b[3]) << 32) |
(int64(b[4]) << 24) | (int64(b[5]) << 16) |
(int64(b[6]) << 8) | (int64(b[7]))
nsec = (int32(b[8]) << 24) | (int32(b[9]) << 16) | (int32(b[10]) << 8) | (int32(b[11]))
return
}
func putUnix(b []byte, sec int64, nsec int32) {
b[0] = byte(sec >> 56)
b[1] = byte(sec >> 48)
b[2] = byte(sec >> 40)
b[3] = byte(sec >> 32)
b[4] = byte(sec >> 24)
b[5] = byte(sec >> 16)
b[6] = byte(sec >> 8)
b[7] = byte(sec)
b[8] = byte(nsec >> 24)
b[9] = byte(nsec >> 16)
b[10] = byte(nsec >> 8)
b[11] = byte(nsec)
}
/* -----------------------------
prefix utilities
----------------------------- */
// write prefix and uint8
func prefixu8(b []byte, pre byte, sz uint8) {
b[0] = pre
b[1] = byte(sz)
}
// write prefix and big-endian uint16
func prefixu16(b []byte, pre byte, sz uint16) {
b[0] = pre
b[1] = byte(sz >> 8)
b[2] = byte(sz)
}
// write prefix and big-endian uint32
func prefixu32(b []byte, pre byte, sz uint32) {
b[0] = pre
b[1] = byte(sz >> 24)
b[2] = byte(sz >> 16)
b[3] = byte(sz >> 8)
b[4] = byte(sz)
}
func prefixu64(b []byte, pre byte, sz uint64) {
b[0] = pre
b[1] = byte(sz >> 56)
b[2] = byte(sz >> 48)
b[3] = byte(sz >> 40)
b[4] = byte(sz >> 32)
b[5] = byte(sz >> 24)
b[6] = byte(sz >> 16)
b[7] = byte(sz >> 8)
b[8] = byte(sz)
}