1 package qr
2
3 import (
4 "github.com/boombuler/barcode/utils"
5 )
6
7 type errorCorrection struct {
8 rs *utils.ReedSolomonEncoder
9 }
10
11 var ec = newErrorCorrection()
12
13 func newErrorCorrection() *errorCorrection {
14 fld := utils.NewGaloisField(285, 256, 0)
15 return &errorCorrection{utils.NewReedSolomonEncoder(fld)}
16 }
17
18 func (ec *errorCorrection) calcECC(data []byte, eccCount byte) []byte {
19 dataInts := make([]int, len(data))
20 for i := 0; i < len(data); i++ {
21 dataInts[i] = int(data[i])
22 }
23 res := ec.rs.Encode(dataInts, int(eccCount))
24 result := make([]byte, len(res))
25 for i := 0; i < len(res); i++ {
26 result[i] = byte(res[i])
27 }
28 return result
29 }
30
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