1 /*
2 * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 /*
27 */
28
29 package sun.nio.cs;
30
31 import java.nio.ByteBuffer;
32 import java.nio.CharBuffer;
33 import java.nio.charset.Charset;
34 import java.nio.charset.CharsetDecoder;
35 import java.nio.charset.CharsetEncoder;
36 import java.nio.charset.CoderResult;
37 import java.nio.charset.CharacterCodingException;
38 import java.nio.charset.MalformedInputException;
39 import java.nio.charset.UnmappableCharacterException;
40
41
42 class ISO_8859_1
43 extends Charset
44 implements HistoricallyNamedCharset
45 {
46
47 public ISO_8859_1() {
48 super("ISO-8859-1", StandardCharsets.aliases_ISO_8859_1);
49 }
50
51 public String historicalName() {
52 return "ISO8859_1";
53 }
54
55 public boolean contains(Charset cs) {
56 return ((cs instanceof US_ASCII)
57 || (cs instanceof ISO_8859_1));
58 }
59
60 public CharsetDecoder newDecoder() {
61 return new Decoder(this);
62 }
63
64 public CharsetEncoder newEncoder() {
65 return new Encoder(this);
66 }
67
68 private static class Decoder extends CharsetDecoder {
69
70 private Decoder(Charset cs) {
71 super(cs, 1.0f, 1.0f);
72 }
73
74 private CoderResult decodeArrayLoop(ByteBuffer src,
75 CharBuffer dst)
76 {
77 byte[] sa = src.array();
78 int sp = src.arrayOffset() + src.position();
79 int sl = src.arrayOffset() + src.limit();
80 assert (sp <= sl);
81 sp = (sp <= sl ? sp : sl);
82 char[] da = dst.array();
83 int dp = dst.arrayOffset() + dst.position();
84 int dl = dst.arrayOffset() + dst.limit();
85 assert (dp <= dl);
86 dp = (dp <= dl ? dp : dl);
87
88 try {
89 while (sp < sl) {
90 byte b = sa[sp];
91 if (dp >= dl)
92 return CoderResult.OVERFLOW;
93 da[dp++] = (char)(b & 0xff);
94 sp++;
95 }
96 return CoderResult.UNDERFLOW;
97 } finally {
98 src.position(sp - src.arrayOffset());
99 dst.position(dp - dst.arrayOffset());
100 }
101 }
102
103 private CoderResult decodeBufferLoop(ByteBuffer src,
104 CharBuffer dst)
105 {
106 int mark = src.position();
107 try {
108 while (src.hasRemaining()) {
109 byte b = src.get();
110 if (!dst.hasRemaining())
111 return CoderResult.OVERFLOW;
112 dst.put((char)(b & 0xff));
113 mark++;
114 }
115 return CoderResult.UNDERFLOW;
116 } finally {
117 src.position(mark);
118 }
119 }
120
121 protected CoderResult decodeLoop(ByteBuffer src,
122 CharBuffer dst)
123 {
124 if (src.hasArray() && dst.hasArray())
125 return decodeArrayLoop(src, dst);
126 else
127 return decodeBufferLoop(src, dst);
128 }
129
130 }
131
132 private static class Encoder extends CharsetEncoder {
133
134 private Encoder(Charset cs) {
135 super(cs, 1.0f, 1.0f);
136 }
137
138 public boolean canEncode(char c) {
139 return c <= '\u00FF';
140 }
141
142 private final Surrogate.Parser sgp = new Surrogate.Parser();
143
144 private CoderResult encodeArrayLoop(CharBuffer src,
145 ByteBuffer dst)
146 {
147 char[] sa = src.array();
148 int sp = src.arrayOffset() + src.position();
149 int sl = src.arrayOffset() + src.limit();
150 assert (sp <= sl);
151 sp = (sp <= sl ? sp : sl);
152 byte[] da = dst.array();
153 int dp = dst.arrayOffset() + dst.position();
154 int dl = dst.arrayOffset() + dst.limit();
155 assert (dp <= dl);
156 dp = (dp <= dl ? dp : dl);
157 try {
158 while (sp < sl) {
159 char c = sa[sp];
160 if (c <= '\u00FF') {
161 if (dp >= dl)
162 return CoderResult.OVERFLOW;
163 da[dp++] = (byte)c;
164 sp++;
165 continue;
166 }
167 if (sgp.parse(c, sa, sp, sl) < 0)
168 return sgp.error();
169 return sgp.unmappableResult();
170 }
171 return CoderResult.UNDERFLOW;
172 } finally {
173 src.position(sp - src.arrayOffset());
174 dst.position(dp - dst.arrayOffset());
175 }
176 }
177
178 private CoderResult encodeBufferLoop(CharBuffer src,
179 ByteBuffer dst)
180 {
181 int mark = src.position();
182 try {
183 while (src.hasRemaining()) {
184 char c = src.get();
185 if (c <= '\u00FF') {
186 if (!dst.hasRemaining())
187 return CoderResult.OVERFLOW;
188 dst.put((byte)c);
189 mark++;
190 continue;
191 }
192 if (sgp.parse(c, src) < 0)
193 return sgp.error();
194 return sgp.unmappableResult();
195 }
196 return CoderResult.UNDERFLOW;
197 } finally {
198 src.position(mark);
199 }
200 }
201
202 protected CoderResult encodeLoop(CharBuffer src,
203 ByteBuffer dst)
204 {
205 if (src.hasArray() && dst.hasArray())
206 return encodeArrayLoop(src, dst);
207 else
208 return encodeBufferLoop(src, dst);
209 }
210
211 }
212 }