Nadesłany przez Tomasz Lubiński, 20 grudnia 2011 21:06
Kod przedstawiony poniżej przedstawia główną część rozwiązania problemu.Pobierz pełne rozwiązanie.
Jeżeli nie odpowiada Ci sposób formatowania kodu przez autora skorzystaj z pretty printer'a i dostosuj go automatycznie do siebie.
code93ext.js:
//Extended Code 93 //(c) 2011 by Tomasz Lubinski //www.algorytm.org var special_1 = '\u0080'; // ($) var special_2 = '\u0081'; // (%) var special_3 = '\u0082'; // (/) var special_4 = '\u0083'; // (+) var code93signs = [ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%', special_1, special_2, special_3, special_4]; var extendedCode93Replace = [ "\u0081U", "\u0080A", "\u0080B", "\u0080C", "\u0080D", "\u0080E", "\u0080F", "\u0080G", "\u0080H", "\u0080I", "\u0080J", "\u0080K", "\u0080L", "\u0080M", "\u0080N", "\u0080O", "\u0080P", "\u0080Q", "\u0080R", "\u0080S", "\u0080T", "\u0080U", "\u0080V", "\u0080W", "\u0080X", "\u0080Y", "\u0080Z", "\u0081A", "\u0081B", "\u0081C", "\u0081D", "\u0081E", " ", "\u0082A", "\u0082B", "\u0082C", "\u0082D", "\u0082E", "\u0082F", "\u0082G", "\u0082H", "\u0082I", "\u0082J", "\u0082K", "\u0082L", "-", ".", "\u0082O", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "\u0082Z", "\u0081F", "\u0081G", "\u0081H", "\u0081I", "\u0081J", "\u0081V", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "\u0081K", "\u0081L", "\u0081M", "\u0081N", "\u0081O", "\u0081W", "\u0083A", "\u0083B", "\u0083C", "\u0083D", "\u0083E", "\u0083F", "\u0083G", "\u0083H", "\u0083I", "\u0083J", "\u0083K", "\u0083L", "\u0083M", "\u0083N", "\u0083O", "\u0083P", "\u0083Q", "\u0083R", "\u0083S", "\u0083T", "\u0083U", "\u0083V", "\u0083W", "\u0083X", "\u0083Y", "\u0083Z", "\u0081P", "\u0081Q", "\u0081R", "\u0081S", "\u0081T" ]; var code93bars = [ [1, 0, 0, 0, 1, 0, 1, 0, 0], [1, 0, 1, 0, 0, 1, 0, 0, 0], [1, 0, 1, 0, 0, 0, 1, 0, 0], [1, 0, 1, 0, 0, 0, 0, 1, 0], [1, 0, 0, 1, 0, 1, 0, 0, 0], [1, 0, 0, 1, 0, 0, 1, 0, 0], [1, 0, 0, 1, 0, 0, 0, 1, 0], [1, 0, 1, 0, 1, 0, 0, 0, 0], [1, 0, 0, 0, 1, 0, 0, 1, 0], [1, 0, 0, 0, 0, 1, 0, 1, 0], [1, 1, 0, 1, 0, 1, 0, 0, 0], [1, 1, 0, 1, 0, 0, 1, 0, 0], [1, 1, 0, 1, 0, 0, 0, 1, 0], [1, 1, 0, 0, 1, 0, 1, 0, 0], [1, 1, 0, 0, 1, 0, 0, 1, 0], [1, 1, 0, 0, 0, 1, 0, 1, 0], [1, 0, 1, 1, 0, 1, 0, 0, 0], [1, 0, 1, 1, 0, 0, 1, 0, 0], [1, 0, 1, 1, 0, 0, 0, 1, 0], [1, 0, 0, 1, 1, 0, 1, 0, 0], [1, 0, 0, 0, 1, 1, 0, 1, 0], [1, 0, 1, 0, 1, 1, 0, 0, 0], [1, 0, 1, 0, 0, 1, 1, 0, 0], [1, 0, 1, 0, 0, 0, 1, 1, 0], [1, 0, 0, 1, 0, 1, 1, 0, 0], [1, 0, 0, 0, 1, 0, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 0, 0], [1, 1, 0, 1, 1, 0, 0, 1, 0], [1, 1, 0, 1, 0, 1, 1, 0, 0], [1, 1, 0, 1, 0, 0, 1, 1, 0], [1, 1, 0, 0, 1, 0, 1, 1, 0], [1, 1, 0, 0, 1, 1, 0, 1, 0], [1, 0, 1, 1, 0, 1, 1, 0, 0], [1, 0, 1, 1, 0, 0, 1, 1, 0], [1, 0, 0, 1, 1, 0, 1, 1, 0], [1, 0, 0, 1, 1, 1, 0, 1, 0], [1, 0, 0, 1, 0, 1, 1, 1, 0], [1, 1, 1, 0, 1, 0, 1, 0, 0], [1, 1, 1, 0, 1, 0, 0, 1, 0], [1, 1, 1, 0, 0, 1, 0, 1, 0], [1, 0, 1, 1, 0, 1, 1, 1, 0], [1, 0, 1, 1, 1, 0, 1, 1, 0], [1, 1, 0, 1, 0, 1, 1, 1, 0], [1, 0, 0, 1, 0, 0, 1, 1, 0], [1, 1, 1, 0, 1, 1, 0, 1, 0], [1, 1, 1, 0, 1, 0, 1, 1, 0], [1, 0, 0, 1, 1, 0, 0, 1, 0] ]; var start_stop = [ 1, 0, 1, 0, 1, 1, 1, 1, 0 ]; var termination_bar = [ 1 ]; /* Return letter index, or -1 if not correct */ function getLetterIndex(ch) { for (var i=0; i<code93signs.length; i++) { if (code93signs[i] == ch) return i; } return -1; } /* Return check digit C */ function checkDigitC(code93) { var sum = 0; var w = 0; for (var i=code93.length-1; i>=0; i--) { sum += (getLetterIndex(code93[i]) * ((w % 20) + 1)); w++; } return (sum % 47); } /* Return check digit K */ function checkDigitK(code93) { var sum = checkDigitC(code93); var w = 1; for (var i=code93.length-1; i>=0; i--) { sum += (getLetterIndex(code93[i]) * ((w % 15) + 1)); w++; } return (sum % 47); } /* Convert code to bars */ function convert(code93) { var bars = new Array(9*(code93.length+4) + 1); /* add start bars */ for (var j=0; j<9; j++) { bars[j] = start_stop[j]; } /* add character codes */ for (var i=0; i<code93.length; i++) { var toCopy = code93bars[getLetterIndex(code93[i])]; for (var j=0; j<9; j++) { bars[i*9 + 9 + j] = toCopy[j]; } } /* add check digit C */ var toCopy = code93bars[checkDigitC(code93)]; for (var j=0; j<9; j++) { bars[(code93.length+1)*9 + j] = toCopy[j]; } /* add check digit K */ var toCopy = code93bars[checkDigitK(code93)]; for (var j=0; j<9; j++) { bars[(code93.length+2)*9 + j] = toCopy[j]; } /* add stop bars */ for (var j=0; j<9; j++) { bars[(code93.length+3)*9 + j] = start_stop[j]; } /* add termination bar */ bars[(code93.length+4)*9] = termination_bar[0]; return bars; } /* converts to code 93 set of characters */ function convertToCode93(code93ext) { var result = ""; for (var i=0; i<code93ext.length; i++) { if ((code93ext.charCodeAt(i) >= 0) && (code93ext.charCodeAt(i) <= 127)) result += extendedCode93Replace[code93ext.charCodeAt(i)]; else return null; } return result; } //initialize data function generate(code93ext) { var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); /* convert to code 93 set of characters */ var code93 = convertToCode93(code93ext); if (code93 != null) { var bars = convert(code93); /* clear canvas and set its width */ canvas.width = bars.length*2+20; for (i=0; i<bars.length; i++) { /* Black bar */ if (bars[i] == 1) { ctx.fillRect(10+2*i, 10, 2, 70); } } ctx.fillStyle = "rgb(0,0,0)"; ctx.font = "10pt Arial"; ctx.textBaseline = "top"; ctx.textAlign = "center"; ctx.fillText(code93ext, canvas.width/2, 90); } else { ctx.fillStyle = "rgb(255,0,0)"; ctx.font = "10pt Arial"; ctx.textBaseline = "top"; ctx.textAlign = "left"; ctx.fillText("Nieprawidłowy", 10, 10); ctx.fillText("kod", 10, 25); ctx.fillText("Incorrect", 10, 50); ctx.fillText("code", 10, 65); } }