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package nlenc
import (
"fmt"
"unsafe"
)
// PutUint8 encodes a uint8 into b.
// If b is not exactly 1 byte in length, PutUint8 will panic.
func PutUint8(b []byte, v uint8) {
if l := len(b); l != 1 {
panic(fmt.Sprintf("PutUint8: unexpected byte slice length: %d", l))
}
b[0] = v
}
// PutUint16 encodes a uint16 into b using the host machine's native endianness.
// If b is not exactly 2 bytes in length, PutUint16 will panic.
func PutUint16(b []byte, v uint16) {
if l := len(b); l != 2 {
panic(fmt.Sprintf("PutUint16: unexpected byte slice length: %d", l))
}
*(*uint16)(unsafe.Pointer(&b[0])) = v
}
// PutUint32 encodes a uint32 into b using the host machine's native endianness.
// If b is not exactly 4 bytes in length, PutUint32 will panic.
func PutUint32(b []byte, v uint32) {
if l := len(b); l != 4 {
panic(fmt.Sprintf("PutUint32: unexpected byte slice length: %d", l))
}
*(*uint32)(unsafe.Pointer(&b[0])) = v
}
// PutUint64 encodes a uint64 into b using the host machine's native endianness.
// If b is not exactly 8 bytes in length, PutUint64 will panic.
func PutUint64(b []byte, v uint64) {
if l := len(b); l != 8 {
panic(fmt.Sprintf("PutUint64: unexpected byte slice length: %d", l))
}
*(*uint64)(unsafe.Pointer(&b[0])) = v
}
// PutInt32 encodes a int32 into b using the host machine's native endianness.
// If b is not exactly 4 bytes in length, PutInt32 will panic.
func PutInt32(b []byte, v int32) {
if l := len(b); l != 4 {
panic(fmt.Sprintf("PutInt32: unexpected byte slice length: %d", l))
}
*(*int32)(unsafe.Pointer(&b[0])) = v
}
// Uint8 decodes a uint8 from b.
// If b is not exactly 1 byte in length, Uint8 will panic.
func Uint8(b []byte) uint8 {
if l := len(b); l != 1 {
panic(fmt.Sprintf("Uint8: unexpected byte slice length: %d", l))
}
return b[0]
}
// Uint16 decodes a uint16 from b using the host machine's native endianness.
// If b is not exactly 2 bytes in length, Uint16 will panic.
func Uint16(b []byte) uint16 {
if l := len(b); l != 2 {
panic(fmt.Sprintf("Uint16: unexpected byte slice length: %d", l))
}
return *(*uint16)(unsafe.Pointer(&b[0]))
}
// Uint32 decodes a uint32 from b using the host machine's native endianness.
// If b is not exactly 4 bytes in length, Uint32 will panic.
func Uint32(b []byte) uint32 {
if l := len(b); l != 4 {
panic(fmt.Sprintf("Uint32: unexpected byte slice length: %d", l))
}
return *(*uint32)(unsafe.Pointer(&b[0]))
}
// Uint64 decodes a uint64 from b using the host machine's native endianness.
// If b is not exactly 8 bytes in length, Uint64 will panic.
func Uint64(b []byte) uint64 {
if l := len(b); l != 8 {
panic(fmt.Sprintf("Uint64: unexpected byte slice length: %d", l))
}
return *(*uint64)(unsafe.Pointer(&b[0]))
}
// Int32 decodes an int32 from b using the host machine's native endianness.
// If b is not exactly 4 bytes in length, Int32 will panic.
func Int32(b []byte) int32 {
if l := len(b); l != 4 {
panic(fmt.Sprintf("Int32: unexpected byte slice length: %d", l))
}
return *(*int32)(unsafe.Pointer(&b[0]))
}
// Uint8Bytes encodes a uint8 into a newly-allocated byte slice. It is a
// shortcut for allocating a new byte slice and filling it using PutUint8.
func Uint8Bytes(v uint8) []byte {
b := make([]byte, 1)
PutUint8(b, v)
return b
}
// Uint16Bytes encodes a uint16 into a newly-allocated byte slice using the
// host machine's native endianness. It is a shortcut for allocating a new
// byte slice and filling it using PutUint16.
func Uint16Bytes(v uint16) []byte {
b := make([]byte, 2)
PutUint16(b, v)
return b
}
// Uint32Bytes encodes a uint32 into a newly-allocated byte slice using the
// host machine's native endianness. It is a shortcut for allocating a new
// byte slice and filling it using PutUint32.
func Uint32Bytes(v uint32) []byte {
b := make([]byte, 4)
PutUint32(b, v)
return b
}
// Uint64Bytes encodes a uint64 into a newly-allocated byte slice using the
// host machine's native endianness. It is a shortcut for allocating a new
// byte slice and filling it using PutUint64.
func Uint64Bytes(v uint64) []byte {
b := make([]byte, 8)
PutUint64(b, v)
return b
}
// Int32Bytes encodes a int32 into a newly-allocated byte slice using the
// host machine's native endianness. It is a shortcut for allocating a new
// byte slice and filling it using PutInt32.
func Int32Bytes(v int32) []byte {
b := make([]byte, 4)
PutInt32(b, v)
return b
}
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