Ejemplo n.º 1
0
        /// <summary>
        /// Determine if a character can be represented in a given codeset
        /// </summary>
        /// <param name="CharAscii">character to check for</param>
        /// <param name="currcs">codeset context to test</param>
        /// <returns>true if the codeset contains a representation for the ASCII character</returns>
        public static bool CharCompatibleWithCodeset(int CharAscii, CodeSet currcs)
        {
            CodeSetAllowed csa = CodesetAllowedForChar(CharAscii);

            return(csa == CodeSetAllowed.CodeAorB ||
                   (csa == CodeSetAllowed.CodeA && currcs == CodeSet.CodeA) ||
                   (csa == CodeSetAllowed.CodeB && currcs == CodeSet.CodeB));
        }
Ejemplo n.º 2
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        /// <summary>
        /// Determines the best starting code set based on the the first two
        /// characters of the string to be encoded
        /// </summary>
        /// <param name="csa1">First character of input string</param>
        /// <param name="csa2">Second character of input string</param>
        /// <returns>The codeset determined to be best to start with</returns>
        private static CodeSet GetBestStartSet(CodeSetAllowed csa1, CodeSetAllowed csa2)
        {
            int vote = 0;

            vote += (csa1 == CodeSetAllowed.CodeA) ? 1 : 0;
            vote += (csa1 == CodeSetAllowed.CodeB) ? -1 : 0;
            vote += (csa2 == CodeSetAllowed.CodeA) ? 1 : 0;
            vote += (csa2 == CodeSetAllowed.CodeB) ? -1 : 0;

            return((vote > 0) ? CodeSet.CodeA : CodeSet.CodeB);   // ties go to codeB due to my own prejudices
        }
Ejemplo n.º 3
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        /// <summary>
        /// Transform the string into integers representing the Code128 codes
        /// necessary to represent it
        /// </summary>
        /// <param name="AsciiData">String to be encoded</param>
        /// <returns>Code128 representation</returns>
        private static int[] StringToCode128(string AsciiData)
        {
            // turn the string into ascii byte data
            byte[] asciiBytes = Encoding.ASCII.GetBytes(AsciiData);

            // decide which codeset to start with
            CodeSetAllowed csa1   = asciiBytes.Length > 0 ? CodesetAllowedForChar(asciiBytes[0]) : CodeSetAllowed.CodeAorB;
            CodeSetAllowed csa2   = asciiBytes.Length > 0 ? CodesetAllowedForChar(asciiBytes[1]) : CodeSetAllowed.CodeAorB;
            CodeSet        currcs = GetBestStartSet(csa1, csa2);

            // set up the beginning of the barcode
            System.Collections.ArrayList codes = new System.Collections.ArrayList(asciiBytes.Length + 3); // assume no codeset changes, account for start, checksum, and stop
            codes.Add(StartCodeForCodeSet(currcs));

            // add the codes for each character in the string
            for (int i = 0; i < asciiBytes.Length; i++)
            {
                int thischar = asciiBytes[i];
                int nextchar = asciiBytes.Length > (i + 1) ? asciiBytes[i + 1] : -1;

                codes.AddRange(CodesForChar(thischar, nextchar, ref currcs));
            }

            // calculate the check digit
            int checksum = (int)(codes[0]);

            for (int i = 1; i < codes.Count; i++)
            {
                checksum += i * (int)(codes[i]);
            }
            codes.Add(checksum % 103);

            codes.Add(StopCode());

            int[] result = codes.ToArray(typeof(int)) as int[];
            return(result);
        }
Ejemplo n.º 4
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        public static bool CharCompatibleWithCodeset(int CharAscii, CodeSet currcs)
        {
            CodeSetAllowed allowed = CodesetAllowedForChar(CharAscii);

            return(((allowed == CodeSetAllowed.CodeAorB) || ((allowed == CodeSetAllowed.CodeA) && (currcs == CodeSet.CodeA))) || ((allowed == CodeSetAllowed.CodeB) && (currcs == CodeSet.CodeB)));
        }
Ejemplo n.º 5
0
        private CodeSet PickStartSet(CodeSetAllowed csa1, CodeSetAllowed csa2)
        {
            int vote = 0;

            vote += (csa1 == CodeSetAllowed.CodeA) ? 1 : 0;
            vote += (csa1 == CodeSetAllowed.CodeB) ? -1 : 0;
            vote += (csa2 == CodeSetAllowed.CodeA) ? 1 : 0;
            vote += (csa2 == CodeSetAllowed.CodeB) ? -1 : 0;

            return (vote > 0) ? CodeSet.CodeA : CodeSet.CodeB;
        }