replace zxq.co/ripple/hanayo

vendor/github.com/boombuler/barcode/datamatrix/encoder.go

@@ -0,0 +1,75 @@
+// Package datamatrix can create Datamatrix barcodes
+package datamatrix
+
+import (
+	"errors"
+
+	"github.com/boombuler/barcode"
+)
+
+// Encode returns a Datamatrix barcode for the given content
+func Encode(content string) (barcode.Barcode, error) {
+	data := encodeText(content)
+
+	var size *dmCodeSize
+	for _, s := range codeSizes {
+		if s.DataCodewords() >= len(data) {
+			size = s
+			break
+		}
+	}
+	if size == nil {
+		return nil, errors.New("to much data to encode")
+	}
+	data = addPadding(data, size.DataCodewords())
+	data = ec.calcECC(data, size)
+	code := render(data, size)
+	if code != nil {
+		code.content = content
+		return code, nil
+	}
+	return nil, errors.New("unable to render barcode")
+}
+
+func render(data []byte, size *dmCodeSize) *datamatrixCode {
+	cl := newCodeLayout(size)
+
+	cl.SetValues(data)
+
+	return cl.Merge()
+}
+
+func encodeText(content string) []byte {
+	var result []byte
+	input := []byte(content)
+
+	for i := 0; i < len(input); {
+		c := input[i]
+		i++
+
+		if c >= '0' && c <= '9' && i < len(input) && input[i] >= '0' && input[i] <= '9' {
+			// two numbers...
+			c2 := input[i]
+			i++
+			cw := byte(((c-'0')*10 + (c2 - '0')) + 130)
+			result = append(result, cw)
+		} else if c > 127 {
+			// not correct... needs to be redone later...
+			result = append(result, 235, c-127)
+		} else {
+			result = append(result, c+1)
+		}
+	}
+	return result
+}
+
+func addPadding(data []byte, toCount int) []byte {
+	if len(data) < toCount {
+		data = append(data, 129)
+	}
+	for len(data) < toCount {
+		R := ((149 * (len(data) + 1)) % 253) + 1
+		data = append(data, byte((129+R)%254))
+	}
+	return data
+}