Diff

Differences From Artifact [2cc1907fb9]:

To Artifact [c65cc5c256]:


9
10
11
12
13
14
15
16







17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
..
99
100
101
102
103
104
105

106
107

108
109
110
111
112

113
114
115
116
117
118
119
120
121
122
123
124
type context struct {
	table  [1 << 16]byte
	buffer [1 << 3]byte
	input  []byte
	hash   uint16
}

// Returns a closure over the provided writer that compresses data when called.







//
// It can buffer data as the predictor mandates 8-byte blocks with a header.
// A call with no data will force a flush.
func Compressor(writer io.Writer) func([]byte) error {
	var ctx context
	ctx.input = ctx.buffer[:0]

	// Forward declaration as it is required for recursion
	var write func(data []byte) error

	write = func(data []byte) error {
		var (
			blockSize    int = 8
			bufferLength int = len(ctx.input)
		)

................................................................................

		return nil
	}

	return write
}


type reader func([]byte) (int, error)


func (r reader) Read(output []byte) (int, error) {
	return r(output)
}

// TODO - document

func Decompressor(wrapped io.Reader) io.Reader {
	var ctx context
	ctx.input = ctx.buffer[:0]

	return reader(func(output []byte) (int, error) {
		var (
			err       error
			flags     byte
			readCount int
		)

		// Sanity check for space to read into







|
>
>
>
>
>
>
>



|




|







 







>
|

>
|



|
>




|







9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
...
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
type context struct {
	table  [1 << 16]byte
	buffer [1 << 3]byte
	input  []byte
	hash   uint16
}

type compressor func([]byte) error

func (w compressor) Write(data []byte) (int, error) {
	return len(data), w(data)
}

// Returns an io.Writer implementation that wraps the provided io.Writer
// and compresses data according to the predictor algorithm
//
// It can buffer data as the predictor mandates 8-byte blocks with a header.
// A call with no data will force a flush.
func Compressor(writer io.Writer) io.Writer {
	var ctx context
	ctx.input = ctx.buffer[:0]

	// Forward declaration as it is required for recursion
	var write compressor

	write = func(data []byte) error {
		var (
			blockSize    int = 8
			bufferLength int = len(ctx.input)
		)

................................................................................

		return nil
	}

	return write
}

// A function type alias so that it can have methods attached to it
type decompressor func([]byte) (int, error)

// Required to implement io.Reader
func (r decompressor) Read(output []byte) (int, error) {
	return r(output)
}

// Returns an io.Reader implementation that wraps the provided io.Reader
// and decompresses data according to the predictor algorithm
func Decompressor(wrapped io.Reader) io.Reader {
	var ctx context
	ctx.input = ctx.buffer[:0]

	return decompressor(func(output []byte) (int, error) {
		var (
			err       error
			flags     byte
			readCount int
		)

		// Sanity check for space to read into