barcodedatamatrix.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

        for (; ptrIn < textLength; ++ptrIn) {
            c = x[ptrIn];
            if (ptrOut >= dataLength)
                break;
            if (c < 40) {
                if (ptrIn == 0 || (ptrIn > 0 && x[ptrIn - 1] > 40))
                    data[dataOffset + ptrOut++] = (byte)238;
                if (ptrOut + 2 > dataLength)
                    break;
                n = 1600 * x[ptrIn] + 40 * x[ptrIn + 1] + x[ptrIn + 2] + 1;
                data[dataOffset + ptrOut++] = (byte)(n / 256);
                data[dataOffset + ptrOut++] = (byte)n;
                ptrIn += 2;
            }
            else {
                if (ptrIn > 0 && x[ptrIn - 1] < 40)
                    data[dataOffset + ptrOut++] = (byte)254;
                ci = text[ptrIn + textOffset] & 0xff;
                if (ci > 127) {
                    data[dataOffset + ptrOut++] = (byte)235;
                    ci -= 128;
                }
                if (ptrOut >= dataLength)
                    break;
                data[dataOffset + ptrOut++] = (byte)(ci + 1);
            }
        }
        c = 100;
        if (textLength > 0)
            c = x[textLength - 1];
        if (ptrIn != textLength || (c < 40 && ptrOut >= dataLength))
            return -1;
        if (c < 40)
            data[dataOffset + ptrOut++] = (byte)(254);
        return ptrOut;
    }

    private static int EdifactEncodation(byte[] text, int textOffset, int textLength, byte[] data, int dataOffset, int dataLength) {
        int ptrIn, ptrOut, edi, pedi, c;
        if (textLength == 0)
            return 0;
        ptrIn = 0;
        ptrOut = 0;
        edi = 0;
        pedi = 18;
        boolean ascii = true;
        for (; ptrIn < textLength; ++ptrIn) {
            c = text[ptrIn + textOffset] & 0xff;
            if (((c & 0xe0) == 0x40 || (c & 0xe0) == 0x20) && c != '_') {
                if (ascii) {
                    if (ptrOut + 1 > dataLength)
                        break;
                    data[dataOffset + ptrOut++] = (byte)240;
                    ascii = false;
                }
                c &= 0x3f;
                edi |= c << pedi;
                if (pedi == 0) {
                    if (ptrOut + 3 > dataLength)
                        break;
                    data[dataOffset + ptrOut++] = (byte)(edi >> 16);
                    data[dataOffset + ptrOut++] = (byte)(edi >> 8);
                    data[dataOffset + ptrOut++] = (byte)edi;
                    edi = 0;
                    pedi = 18;
                }
                else
                    pedi -= 6;
            }
            else {
                if (!ascii) {
                    edi |= ('_' & 0x3f) << pedi;
                    if (ptrOut + (3 - pedi / 8) > dataLength)
                        break;
                    data[dataOffset + ptrOut++] = (byte)(edi >> 16);
                    if (pedi <= 12)
                        data[dataOffset + ptrOut++] = (byte)(edi >> 8);
                    if (pedi <= 6)
                        data[dataOffset + ptrOut++] = (byte)edi;
                    ascii = true;
                    pedi = 18;
                    edi = 0;
                }
                if (c > 127) {
                    if (ptrOut >= dataLength)
                        break;
                    data[dataOffset + ptrOut++] = (byte)235;
                    c -= 128;
                }
                if (ptrOut >= dataLength)
                    break;
                data[dataOffset + ptrOut++] = (byte)(c + 1);
            }
        }
        if (ptrIn != textLength)
            return -1;
        if (!ascii) {
            edi |= ('_' & 0x3f) << pedi;
            if (ptrOut + (3 - pedi / 8) > dataLength)
                return -1;
            data[dataOffset + ptrOut++] = (byte)(edi >> 16);
            if (pedi <= 12)
                data[dataOffset + ptrOut++] = (byte)(edi >> 8);
            if (pedi <= 6)
                data[dataOffset + ptrOut++] = (byte)edi;
        }
        return ptrOut;
    }

    private static int C40OrTextEncodation(byte[] text, int textOffset, int textLength, byte[] data, int dataOffset, int dataLength, boolean c40) {
        int ptrIn, ptrOut, encPtr, last0, last1, i, a, c;
        String basic, shift2, shift3;
        if (textLength == 0)
            return 0;
        ptrIn = 0;
        ptrOut = 0;
        if (c40)
            data[dataOffset + ptrOut++] = (byte)230;
        else
            data[dataOffset + ptrOut++] = (byte)239;
        shift2 = "!\"#$%&'()*+,-./:;<=>?@[\\]^_";
        if (c40) {
            basic = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            shift3 = "`abcdefghijklmnopqrstuvwxyz{|}~\177";
        }
        else {
            basic = " 0123456789abcdefghijklmnopqrstuvwxyz";
            shift3 = "`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\177";
        }
        int[] enc = new int[textLength * 4 + 10];
        encPtr = 0;
        last0 = 0;
        last1 = 0;
        while (ptrIn < textLength) {
            if ((encPtr % 3) == 0) {
                last0 = ptrIn;
                last1 = encPtr;
            }
            c = text[textOffset + ptrIn++] & 0xff;
            if (c > 127) {
                c -= 128;
                enc[encPtr++] = 1;
                enc[encPtr++] = 30;
            }
            int idx = basic.indexOf((char)c);
            if (idx >= 0) {
                enc[encPtr++] = idx + 3;
            }
            else if (c < 32) {
                enc[encPtr++] = 0;
                enc[encPtr++] = c;
            }
            else if ((idx = shift2.indexOf((char)c)) >= 0) {
                enc[encPtr++] = 1;
                enc[encPtr++] = idx;
            }
            else if ((idx = shift3.indexOf((char)c)) >= 0) {
                enc[encPtr++] = 2;
                enc[encPtr++] = idx;
            }
        }
        if ((encPtr % 3) != 0) {
            ptrIn = last0;
            encPtr = last1;
        }
        if (encPtr / 3 * 2 > dataLength - 2) {
            return -1;
        }
        i = 0;
        for (; i < encPtr; i += 3) {
            a = 1600 * enc[i] + 40 * enc[i + 1] + enc[i + 2] + 1;
            data[dataOffset + ptrOut++] = (byte)(a / 256);
            data[dataOffset + ptrOut++] = (byte)a;
        }
        data[ptrOut++] = (byte)254;
        i = asciiEncodation(text, ptrIn, textLength - ptrIn, data, ptrOut, dataLength - ptrOut);
        if (i < 0)
            return i;
        return ptrOut + i;
    }

    private static int getEncodation(byte[] text, int textOffset, int textSize, byte[] data, int dataOffset, int dataSize, int options, boolean firstMatch) {
        int e, j, k;
        int[] e1 = new int[6];
        if (dataSize < 0)
            return -1;
        e = -1;
        options &= 7;
        if (options == 0) {
            e1[0] = asciiEncodation(text, textOffset, textSize, data, dataOffset, dataSize);
            if (firstMatch && e1[0] >= 0)
                return e1[0];
            e1[1] = C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, false);
            if (firstMatch && e1[1] >= 0)
                return e1[1];
            e1[2] = C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, true);
            if (firstMatch && e1[2] >= 0)
                return e1[2];
            e1[3] = b256Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
            if (firstMatch && e1[3] >= 0)
                return e1[3];
            e1[4] = X12Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
            if (firstMatch && e1[4] >= 0)
                return e1[4];
            e1[5] = EdifactEncodation(text, textOffset, textSize, data, dataOffset, dataSize);
            if (firstMatch && e1[5] >= 0)
                return e1[5];
            if (e1[0] < 0 && e1[1] < 0 && e1[2] < 0 && e1[3] < 0 && e1[4] < 0 && e1[5] < 0) {
                return -1;
            }
            j = 0;
            e = 99999;
            for (k = 0; k < 6; ++k) {
                if (e1[k] >= 0 && e1[k] < e) {
                    e = e1[k];
                    j = k;
                }
            }
            if (j == 0)
                e = asciiEncodation(text, textOffset, textSize, data, dataOffset, dataSize);
            else if (j == 1)
                e = C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, false);
            else if (j == 2)
                e = C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, true);
            else if (j == 3)
                e = b256Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
            else if (j == 4)
                e = X12Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
            return e;
        }
        switch (options) {
        case DM_ASCII:
            return asciiEncodation(text, textOffset, textSize, data, dataOffset, dataSize);
        case DM_C40:
            return C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, true);
        case DM_TEXT:
            return C40OrTextEncodation(text, textOffset, textSize, data, dataOffset, dataSize, false);
        case DM_B256:
            return b256Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
        case DM_X21:
            return X12Encodation(text, textOffset, textSize, data, dataOffset, dataSize);
        case DM_EDIFACT:
            return EdifactEncodation(text, textOffset, textSize, data, dataOffset, dataSize);
        case DM_RAW:
            if (textSize > dataSize)
                return -1;
            System.arraycopy(text, textOffset, data, dataOffset, textSize);
            return textSize;
        }
        return -1;
    }

    private static int getNumber(byte[] text, int ptrIn, int n) {
        int v, j, c;
        v = 0;
        for (j = 0; j < n; ++j) {
            c = text[ptrIn++] &0xff;
            if (c < '0' || c > '9')
                return -1;
            v = v * 10 + c - '0';
        }
        return v;
    }

    private int processExtensions(byte[] text, int textOffset, int textSize, byte[] data) {
        int order, ptrIn, ptrOut, eci, fn, ft, fi, c;
        if ((options & DM_EXTENSION) == 0)
            return 0;
        order = 0;
        ptrIn = 0;
        ptrOut = 0;
        while (ptrIn < textSize) {
            if (order > 20)
                return -1;
            c = text[textOffset + ptrIn++] &0xff;
            ++order;
            switch (c) {
            case '.':
                extOut = ptrIn;
                return ptrOut;
            case 'e':
                if (ptrIn + 6 > textSize)
                    return -1;
                eci = getNumber(text, textOffset + ptrIn, 6);
                if (eci < 0)
                    return -1;
                ptrIn += 6;
                data[ptrOut++] = (byte)241;
                if (eci < 127)
                    data[ptrOut++] = (byte)(eci + 1);
                else if (eci < 16383) {
                    data[ptrOut++] = (byte)((eci - 127) / 254 + 128);
                    data[ptrOut++] = (byte)(((eci - 127) % 254) + 1);
                }
                else {
                    data[ptrOut++] = (byte)((eci - 16383) / 64516 + 192);
                    data[ptrOut++] = (byte)((((eci - 16383) / 254) % 254) + 1);
                    data[ptrOut++] = (byte)(((eci - 16383) % 254) + 1);
                }
                break;
            case 's': 
                if (order != 1)
                    return -1;
                if (ptrIn + 9 > textSize)
                    return -1;
                fn = getNumber(text, textOffset + ptrIn, 2);
                if (fn <= 0 || fn > 16)
                    return -1;
                ptrIn += 2;
                ft = getNumber(text, textOffset + ptrIn, 2);
                if (ft <= 1 || ft > 16)
                    return -1;
                ptrIn += 2;
                fi = getNumber(text, textOffset + ptrIn, 5);
                if (fi < 0 || fn >= 64516)
                    return -1;
                ptrIn += 5;
                data[ptrOut++] = (byte)(233);
                data[ptrOut++] = (byte)(((fn - 1) << 4) | (17 - ft));
                data[ptrOut++] = (byte)(fi / 254 + 1);
                data[ptrOut++] = (byte)((fi % 254) + 1);
                break;