forked from vmihailenco/msgpack
/
decode_number.go
226 lines (204 loc) · 4.32 KB
/
decode_number.go
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package msgpack
import (
"fmt"
"math"
"reflect"
"gopkg.in/vmihailenco/msgpack.v2/codes"
)
func (d *Decoder) uint8() (uint8, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
return uint8(c), nil
}
func (d *Decoder) uint16() (uint16, error) {
b, err := d.readN(2)
if err != nil {
return 0, err
}
return (uint16(b[0]) << 8) | uint16(b[1]), nil
}
func (d *Decoder) uint32() (uint32, error) {
b, err := d.readN(4)
if err != nil {
return 0, err
}
n := (uint32(b[0]) << 24) |
(uint32(b[1]) << 16) |
(uint32(b[2]) << 8) |
uint32(b[3])
return n, nil
}
func (d *Decoder) uint64() (uint64, error) {
b, err := d.readN(8)
if err != nil {
return 0, err
}
n := (uint64(b[0]) << 56) |
(uint64(b[1]) << 48) |
(uint64(b[2]) << 40) |
(uint64(b[3]) << 32) |
(uint64(b[4]) << 24) |
(uint64(b[5]) << 16) |
(uint64(b[6]) << 8) |
uint64(b[7])
return n, nil
}
func (d *Decoder) DecodeUint64() (uint64, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
if codes.IsFixedNum(c) {
return uint64(int8(c)), nil
}
switch c {
case codes.Uint8:
n, err := d.uint8()
return uint64(n), err
case codes.Int8:
n, err := d.uint8()
return uint64(int8(n)), err
case codes.Uint16:
n, err := d.uint16()
return uint64(n), err
case codes.Int16:
n, err := d.uint16()
return uint64(int16(n)), err
case codes.Uint32:
n, err := d.uint32()
return uint64(n), err
case codes.Int32:
n, err := d.uint32()
return uint64(int32(n)), err
case codes.Uint64, codes.Int64:
return d.uint64()
}
return 0, fmt.Errorf("msgpack: invalid code %x decoding uint64", c)
}
func (d *Decoder) uint64Value(value reflect.Value) error {
v, err := d.DecodeUint64()
if err != nil {
return err
}
value.SetUint(v)
return nil
}
func (d *Decoder) DecodeInt64() (int64, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
if codes.IsFixedNum(c) {
return int64(int8(c)), nil
}
switch c {
case codes.Uint8:
n, err := d.uint8()
return int64(n), err
case codes.Int8:
n, err := d.uint8()
return int64(int8(n)), err
case codes.Uint16:
n, err := d.uint16()
return int64(n), err
case codes.Int16:
n, err := d.uint16()
return int64(int16(n)), err
case codes.Uint32:
n, err := d.uint32()
return int64(n), err
case codes.Int32:
n, err := d.uint32()
return int64(int32(n)), err
case codes.Uint64, codes.Int64:
n, err := d.uint64()
return int64(n), err
}
return 0, fmt.Errorf("msgpack: invalid code %x decoding int64", c)
}
func (d *Decoder) int64Value(v reflect.Value) error {
n, err := d.DecodeInt64()
if err != nil {
return err
}
v.SetInt(n)
return nil
}
func (d *Decoder) DecodeFloat32() (float32, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
if c != codes.Float {
return 0, fmt.Errorf("msgpack: invalid code %x decoding float32", c)
}
b, err := d.uint32()
if err != nil {
return 0, err
}
return math.Float32frombits(b), nil
}
func (d *Decoder) float32Value(value reflect.Value) error {
v, err := d.DecodeFloat32()
if err != nil {
return err
}
value.SetFloat(float64(v))
return nil
}
func (d *Decoder) DecodeFloat64() (float64, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
if c != codes.Double {
return 0, fmt.Errorf("msgpack: invalid code %x decoding float64", c)
}
b, err := d.uint64()
if err != nil {
return 0, err
}
return math.Float64frombits(b), nil
}
func (d *Decoder) float64Value(value reflect.Value) error {
v, err := d.DecodeFloat64()
if err != nil {
return err
}
value.SetFloat(v)
return nil
}
func (d *Decoder) DecodeUint() (uint, error) {
n, err := d.DecodeUint64()
return uint(n), err
}
func (d *Decoder) DecodeUint8() (uint8, error) {
n, err := d.DecodeUint64()
return uint8(n), err
}
func (d *Decoder) DecodeUint16() (uint16, error) {
n, err := d.DecodeUint64()
return uint16(n), err
}
func (d *Decoder) DecodeUint32() (uint32, error) {
n, err := d.DecodeUint64()
return uint32(n), err
}
func (d *Decoder) DecodeInt() (int, error) {
n, err := d.DecodeInt64()
return int(n), err
}
func (d *Decoder) DecodeInt8() (int8, error) {
n, err := d.DecodeInt64()
return int8(n), err
}
func (d *Decoder) DecodeInt16() (int16, error) {
n, err := d.DecodeInt64()
return int16(n), err
}
func (d *Decoder) DecodeInt32() (int32, error) {
n, err := d.DecodeInt64()
return int32(n), err
}