use int8 instead of uint8

attribute.go

@@ -453,7 +453,7 @@ func (d *AttributeDecoder) decodeDate() ([]int, error) {
 	}
 
 	is := make([]int, length)
-	var ti uint8
+	var ti int8
 
 	for i := int16(0); i < length; i++ {
 		if err = binary.Read(d.reader, binary.BigEndian, &ti); err != nil {
@@ -489,7 +489,7 @@ func (d *AttributeDecoder) decodeRange() ([]int, error) {
 type Resolution struct {
 	Height int
 	Width  int
-	Depth  uint8
+	Depth  int8
 }
 
 func (d *AttributeDecoder) decodeResolution() (res Resolution, err error) {

constants.go

@@ -231,27 +231,27 @@ const (
 )
 
 const (
-	JobStatePending    uint8 = 0x03
-	JobStateHeld       uint8 = 0x04
-	JobStateProcessing uint8 = 0x05
-	JobStateStopped    uint8 = 0x06
-	JobStateCanceled   uint8 = 0x07
-	JobStateAborted    uint8 = 0x08
-	JobStateCompleted  uint8 = 0x09
+	JobStatePending    int8 = 0x03
+	JobStateHeld       int8 = 0x04
+	JobStateProcessing int8 = 0x05
+	JobStateStopped    int8 = 0x06
+	JobStateCanceled   int8 = 0x07
+	JobStateAborted    int8 = 0x08
+	JobStateCompleted  int8 = 0x09
 )
 
 const (
-	DocumentStatePending    uint8 = 0x03
-	DocumentStateProcessing uint8 = 0x05
-	DocumentStateCanceled   uint8 = 0x07
-	DocumentStateAborted    uint8 = 0x08
-	DocumentStateCompleted  uint8 = 0x08
+	DocumentStatePending    int8 = 0x03
+	DocumentStateProcessing int8 = 0x05
+	DocumentStateCanceled   int8 = 0x07
+	DocumentStateAborted    int8 = 0x08
+	DocumentStateCompleted  int8 = 0x08
 )
 
 const (
-	PrinterStateIdle       uint8 = 0x0003
-	PrinterStateProcessing uint8 = 0x0004
-	PrinterStateStopped    uint8 = 0x0005
+	PrinterStateIdle       int8 = 0x0003
+	PrinterStateProcessing int8 = 0x0004
+	PrinterStateStopped    int8 = 0x0005
 )
 
 const (
@@ -270,8 +270,8 @@ const (
 const (
 	CharsetLanguage      = "en-US"
 	Charset              = "utf-8"
-	ProtocolVersionMajor = uint8(2)
-	ProtocolVersionMinor = uint8(0)
+	ProtocolVersionMajor = int8(2)
+	ProtocolVersionMinor = int8(0)
 
 	DefaultJobPriority = 50
 

reqest.go

@@ -7,8 +7,8 @@ import (
 )
 
 type Request struct {
-	ProtocolVersionMajor uint8
-	ProtocolVersionMinor uint8
+	ProtocolVersionMajor int8
+	ProtocolVersionMinor int8
 
 	Operation int16
 	RequestId int32

response.go

@@ -11,8 +11,8 @@ import (
 type Attributes map[string][]Attribute
 
 type Response struct {
-	ProtocolVersionMajor uint8
-	ProtocolVersionMinor uint8
+	ProtocolVersionMajor int8
+	ProtocolVersionMinor int8
 
 	StatusCode int16
 	RequestId  int32