| /* |
| * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.io; |
| |
| public class ByteToCharISO2022JP extends ByteToCharJIS0208 { |
| |
| private static final int ASCII = 0; // ESC ( B |
| private static final int JISX0201_1976 = 1; // ESC ( J |
| private static final int JISX0208_1978 = 2; // ESC $ @ |
| private static final int JISX0208_1983 = 3; // ESC $ B |
| private static final int JISX0201_1976_KANA = 4; // ESC ( I |
| private static final int SHIFTOUT = 5; // SO (0x0e) |
| |
| private int currentState; |
| private int savedSize; |
| private byte[] savedBytes; |
| |
| public ByteToCharISO2022JP() { |
| super(); |
| savedBytes = new byte[2]; |
| currentState = ASCII; |
| savedSize = 0; |
| } |
| |
| public int flush(char [] output, int outStart, int outEnd) |
| throws MalformedInputException |
| { |
| if (savedSize != 0) { |
| savedSize = 0; |
| currentState = ASCII; |
| badInputLength = 0; |
| throw new MalformedInputException(); |
| } |
| byteOff = charOff = 0; |
| return 0; |
| } |
| |
| |
| /** |
| * Character conversion |
| */ |
| public int convert(byte[] input, int inOff, int inEnd, |
| char[] output, int outOff, int outEnd) |
| throws UnknownCharacterException, MalformedInputException, |
| ConversionBufferFullException |
| { |
| int previousState = ASCII; |
| int inputSize = 0; |
| char outputChar = '\uFFFD'; |
| // readOff keeps the actual buffer's pointer. |
| // byteOff keeps original buffer's pointer. |
| int readOff = byteOff = inOff; |
| |
| if (savedSize != 0) { |
| if (savedBytes[0] == 0x1b) { // ESC |
| if ((savedSize == 2 && |
| (savedBytes[1] == 0x28 && |
| input[0] != 'B' && |
| input[0] != 'J' && |
| input[0] != 'I') && |
| (savedBytes[1] == 0x24 && |
| input[0] != '@' && |
| input[0] != 'B')) || |
| ((savedSize == 1) && |
| (input[0] != 0x28 && |
| input[0] != 0x24))) { |
| badInputLength = 0; |
| throw new MalformedInputException(); |
| } |
| if ((inEnd - inOff) == 1 && savedSize == 1 && |
| savedBytes[0] == 0x1b) { |
| savedSize = 2; |
| savedBytes[1] = input[0]; |
| byteOff++; |
| return 0; |
| } |
| } |
| byte[] newBuf = new byte[inEnd - inOff + savedSize]; |
| for (int i = 0; i < savedSize; i++) { |
| newBuf[i] = savedBytes[i]; |
| } |
| System.arraycopy(input, inOff, newBuf, savedSize, inEnd - inOff); |
| byteOff -= savedSize; |
| input = newBuf; |
| inOff = 0; |
| inEnd = newBuf.length; |
| savedSize = 0; |
| } |
| |
| charOff = outOff; |
| readOff = inOff; |
| |
| while(readOff < inEnd) { |
| int byte1, byte2, byte3; |
| boolean noOutput = false; |
| |
| // Is there room in the output buffer for the result? |
| if (charOff >= outEnd) { |
| throw new ConversionBufferFullException(); |
| } |
| |
| // Get the input byte |
| byte1 = input[readOff] & 0xFF; |
| inputSize = 1; |
| |
| if ((byte1 & (byte)0x80) != 0){ |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| |
| // Is this a escape sequence? |
| while (byte1 == 0x1b || byte1 == 0x0e || byte1 == 0x0f) { |
| if (byte1 == 0x1b){ // ESC |
| if (readOff + inputSize + 1 >= inEnd) { |
| if (readOff + inputSize >= inEnd) { |
| savedSize = 1; |
| savedBytes[0] = (byte)byte1; |
| } else { |
| savedSize = 2; |
| savedBytes[0] = (byte)byte1; |
| savedBytes[1] = input[readOff + inputSize]; |
| inputSize++; |
| } |
| break; |
| } |
| byte2 = input[readOff + inputSize] & 0xFF; |
| inputSize++; |
| if ((byte2 & (byte)0x80) != 0){ |
| badInputLength = 2; |
| throw new MalformedInputException(); |
| } |
| if (byte2 == 0x28){ |
| byte3 = input[readOff + inputSize] & 0xFF; |
| inputSize++; |
| if (byte3 == 'B'){ |
| currentState = ASCII; |
| } else if (byte3 == 'J'){ |
| currentState = JISX0201_1976; |
| } else if (byte3 == 'I'){ |
| currentState = JISX0201_1976_KANA; |
| } else { |
| // illegal ESC sequence |
| badInputLength = 3; |
| throw new MalformedInputException(); |
| } |
| } else if (byte2 == '$'){ |
| byte3 = input[readOff + inputSize] & 0xFF; |
| inputSize++; |
| if ((byte3 & (byte)0x80) != 0){ |
| badInputLength = 3; |
| throw new MalformedInputException(); |
| } |
| if (byte3 == '@'){ |
| currentState = JISX0208_1978; |
| } else if (byte3 == 'B'){ |
| currentState = JISX0208_1983; |
| } else { |
| // illegal ESC sequence |
| badInputLength = 3; |
| throw new MalformedInputException(); |
| } |
| } else { |
| // illegal ESC sequence |
| badInputLength = 2; |
| throw new MalformedInputException(); |
| } |
| if (readOff + inputSize >= inEnd) { |
| noOutput = true; |
| break; |
| } else { |
| byte1 = input[readOff + inputSize]; |
| inputSize++; |
| } |
| } else if (byte1 == 0x0e){ // shift out for one byte kana |
| previousState = currentState; |
| currentState = SHIFTOUT; |
| if (readOff + inputSize >= inEnd) { |
| noOutput = true; |
| break; |
| } |
| byte1 = input[readOff + inputSize]; |
| inputSize++; |
| if ((byte1 & (byte)0x80) != 0){ |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| } else if (byte1 == 0x0f){ // shift in for previous mode |
| currentState = previousState; |
| if (readOff + inputSize >= inEnd) { |
| noOutput = true; |
| break; |
| } |
| byte1 = input[readOff + inputSize]; |
| inputSize++; |
| if ((byte1 & (byte)0x80) != 0){ |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| } |
| } |
| if (noOutput || savedSize != 0) { |
| byteOff += inputSize; |
| break; |
| } |
| noOutput = false; |
| switch (currentState){ |
| case ASCII: |
| outputChar = (char)(byte1 & 0xff); |
| break; |
| case JISX0201_1976: |
| switch (byte1) { |
| case 0x5c: |
| outputChar = '\u00a5'; |
| break; |
| case 0x7e: |
| outputChar = '\u203e'; |
| break; |
| default: |
| outputChar = (char)byte1; |
| break; |
| } |
| break; |
| case JISX0208_1978: |
| case JISX0208_1983: |
| if (readOff + inputSize >= inEnd) { |
| savedSize = 1; |
| savedBytes[0] = (byte)byte1; |
| break; |
| } |
| byte2 = input[readOff + inputSize] & 0xff; |
| inputSize++; |
| if ((byte2 & (byte)0x80) != 0){ |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| // jisx0208Chars table convert FULLWIDTH_REVERSE_SOLIDUS |
| // 0x2140 to REVERSE_SOLIDUS (BACKSLASH) 0x5c. |
| // This behavior causes problem because |
| // 0x5c is special escape character for java. |
| if (byte1 == 0x21 && byte2 == 0x40) { |
| outputChar = '\uFF3C'; |
| } else { |
| try { |
| outputChar = getUnicode(byte1, byte2); |
| } catch (ArrayIndexOutOfBoundsException e) { |
| outputChar = '\uFFFD'; |
| } |
| } |
| break; |
| case JISX0201_1976_KANA: |
| case SHIFTOUT: |
| if (byte1 > 0x60) { |
| badInputLength = 1; |
| throw new MalformedInputException(); |
| } |
| outputChar = (char)(byte1 + 0xff40); |
| break; |
| } |
| |
| if (savedSize != 0) { |
| byteOff += inputSize; |
| break; |
| } |
| |
| if (outputChar == '\uFFFD') { |
| if (subMode) |
| outputChar = subChars[0]; |
| else { |
| badInputLength = inputSize; |
| throw new UnknownCharacterException(); |
| } |
| } |
| readOff += inputSize; |
| byteOff += inputSize; |
| output[charOff++] = outputChar; |
| } |
| |
| return charOff - outOff; |
| } |
| |
| public void reset() { |
| byteOff = charOff = 0; |
| currentState = ASCII; |
| savedSize = 0; |
| } |
| |
| public String getCharacterEncoding() { |
| return "ISO2022JP"; |
| } |
| } |
