binascii.java

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    }


    public static PyString __doc__b2a_hqx = new PyString(
         "Encode .hqx data"
    );

    /**
     * Perform hexbin4 binary-to-ASCII translation and return the
     * resulting string. The argument should already be RLE-coded, and have a
     * length divisible by 3 (except possibly the last fragment).
     */
    public static String b2a_hqx(String bin_data) {
        int leftbits = 0;
        char this_ch;
        int leftchar = 0;

        int len = bin_data.length();

        StringBuffer ascii_data = new StringBuffer();

        for(int i = 0; len > 0; len--, i++) {
            // Shift into our buffer, and output any 6bits ready
            leftchar = (leftchar << 8) | bin_data.charAt(i);
            leftbits += 8;
            while (leftbits >= 6) {
                this_ch = (char) ((leftchar >> (leftbits-6)) & 0x3f);
                leftbits -= 6;
                ascii_data.append((char) table_b2a_hqx[this_ch]);
            }
        }
        // Output a possible runt byte
        if (leftbits != 0) {
            leftchar <<= (6-leftbits);
            ascii_data.append((char) table_b2a_hqx[leftchar & 0x3f]);
        }
        return ascii_data.toString();
    }



    public static PyString __doc__rledecode_hqx = new PyString(
        "Decode hexbin RLE-coded string"
    );


    /**
     * Perform RLE-decompression on the data, as per the binhex4
     * standard. The algorithm uses <tt>0x90</tt> after a byte as a repeat
     * indicator, followed by a count. A count of <tt>0</tt> specifies a byte
     * value of <tt>0x90</tt>. The routine returns the decompressed data,
     * unless data input data ends in an orphaned repeat indicator, in which
     * case the <tt>Incomplete</tt> exception is raised.
     */
    static public String rledecode_hqx(String in_data) {
        char in_byte, in_repeat;

        int in_len = in_data.length();
        int i = 0;

        // Empty string is a special case
        if (in_len == 0)
            return "";

        StringBuffer out_data = new StringBuffer();

        // Handle first byte separately (since we have to get angry
        // in case of an orphaned RLE code).
        if (--in_len < 0) throw new PyException(Incomplete);
        in_byte = in_data.charAt(i++);

        if (in_byte == RUNCHAR) {
            if (--in_len < 0) throw new PyException(Incomplete);
            in_repeat = in_data.charAt(i++);

            if (in_repeat != 0) {
                // Note Error, not Incomplete (which is at the end
                // of the string only). This is a programmer error.
                throw new PyException(Error, "Orphaned RLE code at start");
            }
            out_data.append(RUNCHAR);
        } else {
            out_data.append(in_byte);
        }

        while (in_len > 0) {
            if (--in_len < 0) throw new PyException(Incomplete);
            in_byte = in_data.charAt(i++);

            if (in_byte == RUNCHAR) {
                if (--in_len < 0) throw new PyException(Incomplete);
                in_repeat = in_data.charAt(i++);

                if (in_repeat == 0) {
                    // Just an escaped RUNCHAR value
                    out_data.append(RUNCHAR);
                } else {
                    // Pick up value and output a sequence of it
                    in_byte = out_data.charAt(out_data.length()-1);
                    while (--in_repeat > 0)
                        out_data.append(in_byte);
                }
            } else {
                // Normal byte
                out_data.append(in_byte);
            }
        }
        return out_data.toString();
    }



    public static PyString __doc__crc_hqx = new PyString(
        "(data, oldcrc) -> newcrc. Compute hqx CRC incrementally"
    );


    /**
     * Compute the binhex4 crc value of <i>data</i>, starting with an initial
     * <i>crc</i> and returning the result.
     */
    public static int crc_hqx(String bin_data, int crc) {
        int len = bin_data.length();
        int i = 0;

        while(len-- > 0) {
            crc=((crc<<8)&0xff00) ^
                       crctab_hqx[((crc>>8)&0xff)^bin_data.charAt(i++)];
        }

        return crc;
    }




static long[] crc_32_tab = new long[] {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};

    public static int crc32(String bin_data) {
        return crc32(bin_data, 0);
    }

    public static int crc32(String bin_data, long crc) {
        int len = bin_data.length();

        crc &= 0xFFFFFFFFL;
        crc = crc ^ 0xFFFFFFFFL;
        for (int i = 0; i < len; i++) {
            char ch = bin_data.charAt(i);
            crc = (int)crc_32_tab[(int) ((crc ^ ch) & 0xffL)] ^ (crc >> 8);
            /* Note:  (crc >> 8) MUST zero fill on left */
            crc &= 0xFFFFFFFFL;
        }
        if (crc >= 0x80000000)
            return -(int)(crc+1 & 0xFFFFFFFF);
        else
            return (int)(crc & 0xFFFFFFFF);
    }


    private static char[] hexdigit = "0123456789abcdef".toCharArray();


    public static PyString __doc__b2a_hex = new PyString(
        "b2a_hex(data) -> s; Hexadecimal representation of binary data.\n" +
        "\n" +
        "This function is also available as \"hexlify()\"."
    );

    public static String b2a_hex(String argbuf) {
        int arglen = argbuf.length();

        StringBuffer retbuf = new StringBuffer(arglen*2);

        /* make hex version of string, taken from shamodule.c */
        for (int i = 0; i < arglen; i++) {
            char ch = argbuf.charAt(i);
            retbuf.append(hexdigit[(ch >>> 4) & 0xF]);
            retbuf.append(hexdigit[ch & 0xF]);
        }
        return retbuf.toString();

    }


    public static String hexlify(String argbuf) {
        return b2a_hex(argbuf);
    }


    public static PyString a2b_hex$doc = new PyString(
        "a2b_hex(hexstr) -> s; Binary data of hexadecimal representation.\n" +
        "\n" +
        "hexstr must contain an even number of hex digits "+
        "(upper or lower case).\n"+
        "This function is also available as \"unhexlify()\""
    );


    public static String a2b_hex(String argbuf) {
        int arglen = argbuf.length();

        /* XXX What should we do about strings with an odd length?  Should
         * we add an implicit leading zero, or a trailing zero?  For now,
         * raise an exception.
         */
        if (arglen % 2 != 0)
            throw Py.TypeError("Odd-length string");

        StringBuffer retbuf = new StringBuffer(arglen/2);

        for (int i = 0; i < arglen; i += 2) {
            int top = Character.digit(argbuf.charAt(i), 16);
            int bot = Character.digit(argbuf.charAt(i+1), 16);
            if (top == -1 || bot == -1)
                throw Py.TypeError("Non-hexadecimal digit found");
            retbuf.append((char) ((top << 4) + bot));
        }
        return retbuf.toString();
    }


    public static String unhexlify(String argbuf) {
        return a2b_hex(argbuf);
    }



/*
    public static void main(String[] args) {
        String l = b2a_uu("Hello");
        System.out.println(l);
        System.out.println(a2b_uu(l));

        l = b2a_base64("Hello");
        System.out.println(l);
        System.out.println(a2b_base64(l));

        l = b2a_hqx("Hello-");
        System.out.println(l);
        System.out.println(a2b_hqx(l));
    }
*/
}