encoder.go

Documentation: github.com/boombuler/barcode/codabar

     1  // Package codabar can create Codabar barcodes
     2  package codabar
     3  
     4  import (
     5  	"fmt"
     6  	"regexp"
     7  
     8  	"github.com/boombuler/barcode"
     9  	"github.com/boombuler/barcode/utils"
    10  )
    11  
    12  var encodingTable = map[rune][]bool{
    13  	'0': []bool{true, false, true, false, true, false, false, true, true},
    14  	'1': []bool{true, false, true, false, true, true, false, false, true},
    15  	'2': []bool{true, false, true, false, false, true, false, true, true},
    16  	'3': []bool{true, true, false, false, true, false, true, false, true},
    17  	'4': []bool{true, false, true, true, false, true, false, false, true},
    18  	'5': []bool{true, true, false, true, false, true, false, false, true},
    19  	'6': []bool{true, false, false, true, false, true, false, true, true},
    20  	'7': []bool{true, false, false, true, false, true, true, false, true},
    21  	'8': []bool{true, false, false, true, true, false, true, false, true},
    22  	'9': []bool{true, true, false, true, false, false, true, false, true},
    23  	'-': []bool{true, false, true, false, false, true, true, false, true},
    24  	'$': []bool{true, false, true, true, false, false, true, false, true},
    25  	':': []bool{true, true, false, true, false, true, true, false, true, true},
    26  	'/': []bool{true, true, false, true, true, false, true, false, true, true},
    27  	'.': []bool{true, true, false, true, true, false, true, true, false, true},
    28  	'+': []bool{true, false, true, true, false, true, true, false, true, true},
    29  	'A': []bool{true, false, true, true, false, false, true, false, false, true},
    30  	'B': []bool{true, false, false, true, false, false, true, false, true, true},
    31  	'C': []bool{true, false, true, false, false, true, false, false, true, true},
    32  	'D': []bool{true, false, true, false, false, true, true, false, false, true},
    33  }
    34  
    35  // Encode creates a codabar barcode for the given content
    36  func Encode(content string) (barcode.Barcode, error) {
    37  	checkValid, _ := regexp.Compile(`[ABCD][0123456789\-\$\:/\.\+]*[ABCD]$`)
    38  	if content == "!" || checkValid.ReplaceAllString(content, "!") != "!" {
    39  		return nil, fmt.Errorf("can not encode \"%s\"", content)
    40  	}
    41  	resBits := new(utils.BitList)
    42  	for i, r := range content {
    43  		if i > 0 {
    44  			resBits.AddBit(false)
    45  		}
    46  		resBits.AddBit(encodingTable[r]...)
    47  	}
    48  	return utils.New1DCode(barcode.TypeCodabar, content, resBits), nil
    49  }
    50
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