1 /*
2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.nio.cs;
27
28 import java.nio.ByteBuffer;
29 import java.nio.CharBuffer;
30 import java.nio.charset.Charset;
31 import java.nio.charset.CharsetDecoder;
32 import java.nio.charset.CharsetEncoder;
33 import java.nio.charset.CoderResult;
34 import java.util.Arrays;
35
36 class ISO_8859_1
37 extends Charset
38 implements HistoricallyNamedCharset
39 {
40
41 public ISO_8859_1() {
42 super("ISO-8859-1", StandardCharsets.aliases_ISO_8859_1);
43 }
44
45 public String historicalName() {
46 return "ISO8859_1";
47 }
48
49 public boolean contains(Charset cs) {
50 return ((cs instanceof US_ASCII)
51 || (cs instanceof ISO_8859_1));
52 }
53
54 public CharsetDecoder newDecoder() {
55 return new Decoder(this);
56 }
57
58 public CharsetEncoder newEncoder() {
59 return new Encoder(this);
60 }
61
62 private static class Decoder extends CharsetDecoder
63 implements ArrayDecoder {
64 private Decoder(Charset cs) {
65 super(cs, 1.0f, 1.0f);
66 }
67
68 private CoderResult decodeArrayLoop(ByteBuffer src,
69 CharBuffer dst)
70 {
71 byte[] sa = src.array();
72 int sp = src.arrayOffset() + src.position();
73 int sl = src.arrayOffset() + src.limit();
74 assert (sp <= sl);
75 sp = (sp <= sl ? sp : sl);
76 char[] da = dst.array();
77 int dp = dst.arrayOffset() + dst.position();
78 int dl = dst.arrayOffset() + dst.limit();
79 assert (dp <= dl);
80 dp = (dp <= dl ? dp : dl);
81
82 try {
83 while (sp < sl) {
84 byte b = sa[sp];
85 if (dp >= dl)
86 return CoderResult.OVERFLOW;
87 da[dp++] = (char)(b & 0xff);
88 sp++;
89 }
90 return CoderResult.UNDERFLOW;
91 } finally {
92 src.position(sp - src.arrayOffset());
93 dst.position(dp - dst.arrayOffset());
94 }
95 }
96
97 private CoderResult decodeBufferLoop(ByteBuffer src,
98 CharBuffer dst)
99 {
100 int mark = src.position();
101 try {
102 while (src.hasRemaining()) {
103 byte b = src.get();
104 if (!dst.hasRemaining())
105 return CoderResult.OVERFLOW;
106 dst.put((char)(b & 0xff));
107 mark++;
108 }
109 return CoderResult.UNDERFLOW;
110 } finally {
111 src.position(mark);
112 }
113 }
114
115 protected CoderResult decodeLoop(ByteBuffer src,
116 CharBuffer dst)
117 {
118 if (src.hasArray() && dst.hasArray())
119 return decodeArrayLoop(src, dst);
120 else
121 return decodeBufferLoop(src, dst);
122 }
123
124 public int decode(byte[] src, int sp, int len, char[] dst) {
125 if (len > dst.length)
126 len = dst.length;
127 int dp = 0;
128 while (dp < len)
129 dst[dp++] = (char)(src[sp++] & 0xff);
130 return dp;
131 }
132 }
133
134 private static class Encoder extends CharsetEncoder
135 implements ArrayEncoder {
136 private Encoder(Charset cs) {
137 super(cs, 1.0f, 1.0f);
138 }
139
140 public boolean canEncode(char c) {
141 return c <= '\u00FF';
142 }
143
144 public boolean isLegalReplacement(byte[] repl) {
145 return true; // we accept any byte value
146 }
147
148 private final Surrogate.Parser sgp = new Surrogate.Parser();
149
150 // JVM may replace this method with intrinsic code.
151 private static int encodeISOArray(char[] sa, int sp,
152 byte[] da, int dp, int len)
153 {
154 int i = 0;
155 for (; i < len; i++) {
156 char c = sa[sp++];
157 if (c > '\u00FF')
158 break;
159 da[dp++] = (byte)c;
160 }
161 return i;
162 }
163
164 private CoderResult encodeArrayLoop(CharBuffer src,
165 ByteBuffer dst)
166 {
167 char[] sa = src.array();
168 int soff = src.arrayOffset();
169 int sp = soff + src.position();
170 int sl = soff + src.limit();
171 assert (sp <= sl);
172 sp = (sp <= sl ? sp : sl);
173 byte[] da = dst.array();
174 int doff = dst.arrayOffset();
175 int dp = doff + dst.position();
176 int dl = doff + dst.limit();
177 assert (dp <= dl);
178 dp = (dp <= dl ? dp : dl);
179 int dlen = dl - dp;
180 int slen = sl - sp;
181 int len = (dlen < slen) ? dlen : slen;
182 try {
183 int ret = encodeISOArray(sa, sp, da, dp, len);
184 sp = sp + ret;
185 dp = dp + ret;
186 if (ret != len) {
187 if (sgp.parse(sa[sp], sa, sp, sl) < 0)
188 return sgp.error();
189 return sgp.unmappableResult();
190 }
191 if (len < slen)
192 return CoderResult.OVERFLOW;
193 return CoderResult.UNDERFLOW;
194 } finally {
195 src.position(sp - soff);
196 dst.position(dp - doff);
197 }
198 }
199
200 private CoderResult encodeBufferLoop(CharBuffer src,
201 ByteBuffer dst)
202 {
203 int mark = src.position();
204 try {
205 while (src.hasRemaining()) {
206 char c = src.get();
207 if (c <= '\u00FF') {
208 if (!dst.hasRemaining())
209 return CoderResult.OVERFLOW;
210 dst.put((byte)c);
211 mark++;
212 continue;
213 }
214 if (sgp.parse(c, src) < 0)
215 return sgp.error();
216 return sgp.unmappableResult();
217 }
218 return CoderResult.UNDERFLOW;
219 } finally {
220 src.position(mark);
221 }
222 }
223
224 protected CoderResult encodeLoop(CharBuffer src,
225 ByteBuffer dst)
226 {
227 if (src.hasArray() && dst.hasArray())
228 return encodeArrayLoop(src, dst);
229 else
230 return encodeBufferLoop(src, dst);
231 }
232
233 private byte repl = (byte)'?';
234 protected void implReplaceWith(byte[] newReplacement) {
235 repl = newReplacement[0];
236 }
237
238 public int encode(char[] src, int sp, int len, byte[] dst) {
239 int dp = 0;
240 int slen = Math.min(len, dst.length);
241 int sl = sp + slen;
242 while (sp < sl) {
243 int ret = encodeISOArray(src, sp, dst, dp, slen);
244 sp = sp + ret;
245 dp = dp + ret;
246 if (ret != slen) {
247 char c = src[sp++];
248 if (Character.isHighSurrogate(c) && sp < sl &&
249 Character.isLowSurrogate(src[sp])) {
250 if (len > dst.length) {
251 sl++;
252 len--;
253 }
254 sp++;
255 }
256 dst[dp++] = repl;
257 slen = Math.min((sl - sp), (dst.length - dp));
258 }
259 }
260 return dp;
261 }
262 }
263 }