package build.tools.generatecharacter;

import java.io.*;

import java.nio.*;

import java.util.*;

import java.util.zip.*;

public class CharacterName {

    public static void main(String[] args) {

        FileReader reader = null;

        try {

            if (args.length != 2) {

                System.err.println("Usage: java CharacterName UnicodeData.txt uniName.dat");

                System.exit(1);

            }

            reader = new FileReader(args[0]);

            BufferedReader bfr = new BufferedReader(reader);

            String line = null;

            StringBuilder namePool = new StringBuilder();

            byte[] cpPoolBytes = new byte[0x100000];

            boolean[] cpBlocks = new boolean[(Character.MAX_CODE_POINT + 1) >> 8];

            int bkNum = 0;

            ByteBuffer cpBB = ByteBuffer.wrap(cpPoolBytes);

            int lastCp = 0;

            int cpNum = 0;

            while ((line = bfr.readLine()) != null) {

                if (line.startsWith("#"))

                    continue;

                UnicodeSpec spec = UnicodeSpec.parse(line);

                if (spec != null) {

                    int cp = spec.getCodePoint();

                    String name = spec.getName();

                    if (name.equals("<control>") && spec.getOldName() != null) {

                        if (cp == 0x7)  // <control>BELL -> BEL; u+1f514 <-> BELL

                            name = "BEL";

                        else if (spec.getOldName().length() != 0)

                            name = spec.getOldName();

                        /*

                           3 "figment" characters from NameAliases.txt

                           Several documented labels for C1 control code points which

                           were never actually approved in any standard...but were

                           implemented in Perl regex.

                           0080;PADDING CHARACTER;figment

                           0081;HIGH OCTET PRESET;figment

                           0099;SINGLE GRAPHIC CHARACTER INTRODUCER;figment

                        */

                        else if (cp == 0x80)

                            name = "PADDING CHARACTER";

                        else if (cp == 0x81)

                            name = "HIGH OCTET PRESET";

                        else if (cp == 0x99)

                            name = "SINGLE GRAPHIC CHARACTER INTRODUCER";

                        else

                            continue;

                    } else if (name.startsWith("<")) {

                        /*

                          3400    <CJK Ideograph Extension A, First>

                          4db5    <CJK Ideograph Extension A, Last>

                          4e00    <CJK Ideograph, First>

                          9fc3    <CJK Ideograph, Last>

                          ac00    <Hangul Syllable, First>

                          d7a3    <Hangul Syllable, Last>

                          d800    <Non Private Use High Surrogate, First>

                          db7f    <Non Private Use High Surrogate, Last>

                          db80    <Private Use High Surrogate, First>

                          dbff    <Private Use High Surrogate, Last>

                          dc00    <Low Surrogate, First>

                          dfff    <Low Surrogate, Last>

                          e000    <Private Use, First>

                          f8ff    <Private Use, Last>

                         20000    <CJK Ideograph Extension B, First>

                         2a6d6    <CJK Ideograph Extension B, Last>

                         f0000    <Plane 15 Private Use, First>

                         ffffd    <Plane 15 Private Use, Last>

                        */

                        continue;

                    }

                    cpNum++;

                    if (!cpBlocks[cp >> 8]) {

                        cpBlocks[cp >> 8] = true;

                        bkNum++;

                    }

                    if (cp == lastCp + 1) {

                        cpBB.put((byte)name.length());

                    } else {

                        cpBB.put((byte)0);  // segment start flag

                        cpBB.putInt((name.length() << 24) | (cp & 0xffffff));

                    }

                    namePool.append(name);

                    lastCp = cp;

                }

            }

            byte[] namePoolBytes = namePool.toString().getBytes("ASCII");

            int cpLen = cpBB.position();

            int total = cpLen + namePoolBytes.length;

            DataOutputStream dos = new DataOutputStream(

                                       new DeflaterOutputStream(

                                           new FileOutputStream(args[1])));

            dos.writeInt(total);  // total

            dos.writeInt(bkNum);  // bkNum;

            dos.writeInt(cpNum);  // cpNum

            dos.writeInt(cpLen);  // nameOff

            dos.write(cpPoolBytes, 0, cpLen);

            dos.write(namePoolBytes);

            dos.close();

        } catch (Throwable e) {

            System.out.println("Unexpected exception:");

            e.printStackTrace();

        } finally {

            if (reader != null) {

                try {

                    reader.close();

                } catch (Throwable ee) { ee.printStackTrace(); }

            }

        }

    }

}