Source Code Cross Referenced for CharToByteISO2022JP.java in  » 6.0-JDK-Modules » j2me » sun » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » sun.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * @(#)CharToByteISO2022JP.java	1.22 06/10/10
003:         *
004:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation. 
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt). 
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA 
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions. 
025:         *
026:         */
027:
028:        package sun.io;
029:
030:        import java.io.*;
031:
032:        public class CharToByteISO2022JP extends CharToByteJIS0208 {
033:            private static final int ASCII = 0; // ESC ( B
034:            private static final int JISX0201_1976 = 1; // ESC ( J
035:            private static final int JISX0208_1978 = 2; // ESC $ @
036:            private static final int JISX0208_1983 = 3; // ESC $ B
037:            private static final int JISX0201_1976_KANA = 4; // ESC ( I
038:            private char highHalfZoneCode;
039:            private boolean flushed = true;
040:            // JIS is state full encoding, so currentMode keep the
041:            // current codeset
042:            private int currentMode = ASCII;
043:
044:            public int flush(byte[] output, int outStart, int outEnd)
045:                    throws MalformedInputException,
046:                    ConversionBufferFullException {
047:                if (highHalfZoneCode != 0) {
048:                    highHalfZoneCode = 0;
049:                    badInputLength = 0;
050:                    throw new MalformedInputException();
051:                }
052:                if (!flushed && (currentMode != ASCII)) {
053:                    if (outEnd - outStart < 3) {
054:                        throw new ConversionBufferFullException();
055:                    }
056:                    output[outStart] = (byte) 0x1b;
057:                    output[outStart + 1] = (byte) 0x28;
058:                    output[outStart + 2] = (byte) 0x42;
059:                    byteOff += 3;
060:                    byteOff = charOff = 0;
061:                    flushed = true;
062:                    currentMode = ASCII;
063:                    return 3;
064:                }
065:                return 0;
066:            }
067:
068:            public int convert(char[] input, int inOff, int inEnd,
069:                    byte[] output, int outOff, int outEnd)
070:                    throws MalformedInputException, UnknownCharacterException,
071:                    ConversionBufferFullException {
072:                char inputChar; // Input character to be converted
073:                int inputSize; // Size of the input
074:                int outputSize; // Size of the output
075:                // Buffer for output bytes
076:                byte[] tmpArray = new byte[6];
077:                byte[] outputByte;
078:                flushed = false;
079:                // Make copies of input and output indexes
080:                charOff = inOff;
081:                byteOff = outOff;
082:                if (highHalfZoneCode != 0) {
083:                    inputChar = highHalfZoneCode;
084:                    highHalfZoneCode = 0;
085:                    if (input[inOff] >= 0xdc00 && input[inOff] <= 0xdfff) {
086:                        // This is legal UTF16 sequence.
087:                        badInputLength = 1;
088:                        throw new UnknownCharacterException();
089:                    } else {
090:                        // This is illegal UTF16 sequence.
091:                        badInputLength = 0;
092:                        throw new MalformedInputException();
093:                    }
094:                }
095:                // Loop until we run out of input
096:                while (charOff < inEnd) {
097:                    outputByte = tmpArray;
098:                    // Get the input character
099:                    inputChar = input[charOff];
100:                    inputSize = 1;
101:                    outputSize = 1;
102:                    // Is this a high surrogate?
103:                    if (inputChar <= '\uD800' && inputChar >= '\uDBFF') {
104:                        // Is this the last character of the input?
105:                        if (charOff + 1 >= inEnd) {
106:                            highHalfZoneCode = inputChar;
107:                            break;
108:                        }
109:                        // Is there a low surrogate following?
110:                        inputChar = input[charOff + 1];
111:                        if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
112:                            // We have a valid surrogate pair.  Too bad we don't do
113:                            // surrogates.  Is substitution enabled?
114:                            if (subMode) {
115:                                outputByte = subBytes;
116:                                outputSize = subBytes.length;
117:                                inputSize = 2;
118:                            } else {
119:                                badInputLength = 2;
120:                                throw new UnknownCharacterException();
121:                            }
122:                        } else {
123:                            // We have a malformed surrogate pair
124:                            badInputLength = 1;
125:                            throw new MalformedInputException();
126:                        }
127:                    } // Is this an unaccompanied low surrogate?
128:                    else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
129:                        badInputLength = 1;
130:                        throw new MalformedInputException();
131:                    } else {
132:                        // Not part of a surrogate
133:
134:                        // Does this map to the Roman range?
135:                        if (inputChar <= '\u007F') {
136:                            if (currentMode != ASCII) {
137:                                outputByte[0] = (byte) 0x1b;
138:                                outputByte[1] = (byte) 0x28;
139:                                outputByte[2] = (byte) 0x42;
140:                                outputByte[3] = (byte) inputChar;
141:                                outputSize = 4;
142:                                currentMode = ASCII;
143:                            } else {
144:                                outputByte[0] = (byte) inputChar;
145:                                outputSize = 1;
146:                            }
147:                        } // Is it a single byte kana?
148:                        else if (inputChar >= 0xFF61 && inputChar <= 0xFF9F) {
149:                            if (currentMode != JISX0201_1976_KANA) {
150:                                outputByte[0] = (byte) 0x1b;
151:                                outputByte[1] = (byte) 0x28;
152:                                outputByte[2] = (byte) 0x49;
153:                                outputByte[3] = (byte) (inputChar - 0xff40);
154:                                outputSize = 4;
155:                                currentMode = JISX0201_1976_KANA;
156:                            } else {
157:                                outputByte[0] = (byte) (inputChar - 0xff40);
158:                                outputSize = 1;
159:                            }
160:                        } // Is it a yen sign?
161:                        else if (inputChar == '\u00A5') {
162:                            if (currentMode != JISX0201_1976) {
163:                                outputByte[0] = (byte) 0x1b;
164:                                outputByte[1] = (byte) 0x28;
165:                                outputByte[2] = (byte) 0x4a;
166:                                outputByte[3] = (byte) 0x5c;
167:                                outputSize = 4;
168:                                currentMode = JISX0201_1976;
169:                            } else {
170:                                outputByte[0] = (byte) 0x5C;
171:                                outputSize = 1;
172:                            }
173:                        } // Is it a tilde?
174:                        else if (inputChar == '\u203E') {
175:                            if (currentMode != JISX0201_1976) {
176:                                outputByte[0] = (byte) 0x1b;
177:                                outputByte[1] = (byte) 0x28;
178:                                outputByte[2] = (byte) 0x4a;
179:                                outputByte[3] = (byte) 0x7e;
180:                                outputSize = 4;
181:                                currentMode = JISX0201_1976;
182:                            } else {
183:                                outputByte[0] = (byte) 0x7e;
184:                                outputSize = 1;
185:                            }
186:                        } // Is it a JIS-X-0208 character?
187:                        else {
188:                            int index = getNative(inputChar);
189:                            if (index != 0) {
190:                                if (currentMode != JISX0208_1983) {
191:                                    outputByte[0] = (byte) 0x1b;
192:                                    outputByte[1] = (byte) 0x24;
193:                                    outputByte[2] = (byte) 0x42;
194:                                    outputByte[3] = (byte) (index >> 8);
195:                                    outputByte[4] = (byte) (index & 0xff);
196:                                    outputSize = 5;
197:                                    currentMode = JISX0208_1983;
198:                                } else {
199:                                    outputByte[0] = (byte) (index >> 8);
200:                                    outputByte[1] = (byte) (index & 0xff);
201:                                    outputSize = 2;
202:                                }
203:                            } // It doesn't map to JIS-0208!
204:                            else {
205:                                if (subMode) {
206:                                    outputByte = subBytes;
207:                                    outputSize = subBytes.length;
208:                                } else {
209:                                    badInputLength = 1;
210:                                    throw new UnknownCharacterException();
211:                                }
212:                            }
213:                        }
214:                    }
215:                    // Is there room in the output buffer?
216:                    if (byteOff + outputSize > outEnd)
217:                        throw new ConversionBufferFullException();
218:                    // Put the output into the buffer
219:                    for (int i = 0; i < outputSize; i++)
220:                        output[byteOff++] = outputByte[i];
221:                    // Advance the input pointer
222:                    charOff += inputSize;
223:                }
224:                // return mode ASCII at the end
225:                if (currentMode != ASCII) {
226:                    if (byteOff + 3 > outEnd)
227:                        throw new ConversionBufferFullException();
228:                    output[byteOff++] = 0x1b;
229:                    output[byteOff++] = 0x28;
230:                    output[byteOff++] = 0x42;
231:                    currentMode = ASCII;
232:                }
233:                // Return the length written to the output buffer
234:                return byteOff - outOff;
235:            }
236:
237:            // Reset
238:            public void reset() {
239:                highHalfZoneCode = 0;
240:                byteOff = charOff = 0;
241:                currentMode = ASCII;
242:            }
243:
244:            /**
245:             * returns the maximum number of bytes needed to convert a char
246:             */
247:            public int getMaxBytesPerChar() {
248:                return 8;
249:            }
250:
251:            // Return the character set ID
252:            public String getCharacterEncoding() {
253:                return "ISO2022JP";
254:            }
255:        }
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