49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package encoding
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import (
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"math"
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"github.com/shamaton/msgpack/v2/def"
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)
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func (e *encoder) isNegativeFixInt64(v int64) bool {
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return def.NegativeFixintMin <= v && v <= def.NegativeFixintMax
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}
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func (e *encoder) calcInt(v int64) int {
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if v >= 0 {
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return e.calcUint(uint64(v))
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} else if e.isNegativeFixInt64(v) {
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// format code only
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return def.Byte1
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} else if v >= math.MinInt8 {
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return def.Byte1 + def.Byte1
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} else if v >= math.MinInt16 {
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return def.Byte1 + def.Byte2
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} else if v >= math.MinInt32 {
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return def.Byte1 + def.Byte4
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}
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return def.Byte1 + def.Byte8
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}
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func (e *encoder) writeInt(v int64, offset int) int {
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if v >= 0 {
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offset = e.writeUint(uint64(v), offset)
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} else if e.isNegativeFixInt64(v) {
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offset = e.setByte1Int64(v, offset)
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} else if v >= math.MinInt8 {
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offset = e.setByte1Int(def.Int8, offset)
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offset = e.setByte1Int64(v, offset)
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} else if v >= math.MinInt16 {
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offset = e.setByte1Int(def.Int16, offset)
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offset = e.setByte2Int64(v, offset)
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} else if v >= math.MinInt32 {
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offset = e.setByte1Int(def.Int32, offset)
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offset = e.setByte4Int64(v, offset)
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} else {
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offset = e.setByte1Int(def.Int64, offset)
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offset = e.setByte8Int64(v, offset)
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}
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return offset
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}
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