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package flatbuffers
import (
"math"
)
type (
// A SOffsetT stores a signed offset into arbitrary data.
SOffsetT int32
// A UOffsetT stores an unsigned offset into vector data.
UOffsetT uint32
// A VOffsetT stores an unsigned offset in a vtable.
VOffsetT uint16
)
const (
// VtableMetadataFields is the count of metadata fields in each vtable.
VtableMetadataFields = 2
)
// GetByte decodes a little-endian byte from a byte slice.
func GetByte(buf []byte) byte {
return byte(GetUint8(buf))
}
// GetBool decodes a little-endian bool from a byte slice.
func GetBool(buf []byte) bool {
return buf[0] == 1
}
// GetUint8 decodes a little-endian uint8 from a byte slice.
func GetUint8(buf []byte) (n uint8) {
n = uint8(buf[0])
return
}
// GetUint16 decodes a little-endian uint16 from a byte slice.
func GetUint16(buf []byte) (n uint16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
n |= uint16(buf[0])
n |= uint16(buf[1]) << 8
return
}
// GetUint32 decodes a little-endian uint32 from a byte slice.
func GetUint32(buf []byte) (n uint32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
n |= uint32(buf[0])
n |= uint32(buf[1]) << 8
n |= uint32(buf[2]) << 16
n |= uint32(buf[3]) << 24
return
}
// GetUint64 decodes a little-endian uint64 from a byte slice.
func GetUint64(buf []byte) (n uint64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
n |= uint64(buf[0])
n |= uint64(buf[1]) << 8
n |= uint64(buf[2]) << 16
n |= uint64(buf[3]) << 24
n |= uint64(buf[4]) << 32
n |= uint64(buf[5]) << 40
n |= uint64(buf[6]) << 48
n |= uint64(buf[7]) << 56
return
}
// GetInt8 decodes a little-endian int8 from a byte slice.
func GetInt8(buf []byte) (n int8) {
n = int8(buf[0])
return
}
// GetInt16 decodes a little-endian int16 from a byte slice.
func GetInt16(buf []byte) (n int16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
n |= int16(buf[0])
n |= int16(buf[1]) << 8
return
}
// GetInt32 decodes a little-endian int32 from a byte slice.
func GetInt32(buf []byte) (n int32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
n |= int32(buf[0])
n |= int32(buf[1]) << 8
n |= int32(buf[2]) << 16
n |= int32(buf[3]) << 24
return
}
// GetInt64 decodes a little-endian int64 from a byte slice.
func GetInt64(buf []byte) (n int64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
n |= int64(buf[0])
n |= int64(buf[1]) << 8
n |= int64(buf[2]) << 16
n |= int64(buf[3]) << 24
n |= int64(buf[4]) << 32
n |= int64(buf[5]) << 40
n |= int64(buf[6]) << 48
n |= int64(buf[7]) << 56
return
}
// GetFloat32 decodes a little-endian float32 from a byte slice.
func GetFloat32(buf []byte) float32 {
x := GetUint32(buf)
return math.Float32frombits(x)
}
// GetFloat64 decodes a little-endian float64 from a byte slice.
func GetFloat64(buf []byte) float64 {
x := GetUint64(buf)
return math.Float64frombits(x)
}
// GetUOffsetT decodes a little-endian UOffsetT from a byte slice.
func GetUOffsetT(buf []byte) UOffsetT {
return UOffsetT(GetInt32(buf))
}
// GetSOffsetT decodes a little-endian SOffsetT from a byte slice.
func GetSOffsetT(buf []byte) SOffsetT {
return SOffsetT(GetInt32(buf))
}
// GetVOffsetT decodes a little-endian VOffsetT from a byte slice.
func GetVOffsetT(buf []byte) VOffsetT {
return VOffsetT(GetUint16(buf))
}
// WriteByte encodes a little-endian uint8 into a byte slice.
func WriteByte(buf []byte, n byte) {
WriteUint8(buf, uint8(n))
}
// WriteBool encodes a little-endian bool into a byte slice.
func WriteBool(buf []byte, b bool) {
buf[0] = 0
if b {
buf[0] = 1
}
}
// WriteUint8 encodes a little-endian uint8 into a byte slice.
func WriteUint8(buf []byte, n uint8) {
buf[0] = byte(n)
}
// WriteUint16 encodes a little-endian uint16 into a byte slice.
func WriteUint16(buf []byte, n uint16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
}
// WriteUint32 encodes a little-endian uint32 into a byte slice.
func WriteUint32(buf []byte, n uint32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
}
// WriteUint64 encodes a little-endian uint64 into a byte slice.
func WriteUint64(buf []byte, n uint64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
buf[4] = byte(n >> 32)
buf[5] = byte(n >> 40)
buf[6] = byte(n >> 48)
buf[7] = byte(n >> 56)
}
// WriteInt8 encodes a little-endian int8 into a byte slice.
func WriteInt8(buf []byte, n int8) {
buf[0] = byte(n)
}
// WriteInt16 encodes a little-endian int16 into a byte slice.
func WriteInt16(buf []byte, n int16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
}
// WriteInt32 encodes a little-endian int32 into a byte slice.
func WriteInt32(buf []byte, n int32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
}
// WriteInt64 encodes a little-endian int64 into a byte slice.
func WriteInt64(buf []byte, n int64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
buf[4] = byte(n >> 32)
buf[5] = byte(n >> 40)
buf[6] = byte(n >> 48)
buf[7] = byte(n >> 56)
}
// WriteFloat32 encodes a little-endian float32 into a byte slice.
func WriteFloat32(buf []byte, n float32) {
WriteUint32(buf, math.Float32bits(n))
}
// WriteFloat64 encodes a little-endian float64 into a byte slice.
func WriteFloat64(buf []byte, n float64) {
WriteUint64(buf, math.Float64bits(n))
}
// WriteVOffsetT encodes a little-endian VOffsetT into a byte slice.
func WriteVOffsetT(buf []byte, n VOffsetT) {
WriteUint16(buf, uint16(n))
}
// WriteSOffsetT encodes a little-endian SOffsetT into a byte slice.
func WriteSOffsetT(buf []byte, n SOffsetT) {
WriteInt32(buf, int32(n))
}
// WriteUOffsetT encodes a little-endian UOffsetT into a byte slice.
func WriteUOffsetT(buf []byte, n UOffsetT) {
WriteUint32(buf, uint32(n))
}
|
