1 /*
2 * Copyright (c) 2000, 2017, 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.Objects;
35
36 import jdk.internal.HotSpotIntrinsicCandidate;
37
38 public class ISO_8859_1
39 extends Charset
40 implements HistoricallyNamedCharset
41 {
42 public ISO_8859_1() {
43 super("ISO-8859-1", StandardCharsets.aliases_ISO_8859_1());
44 }
45
46 public String historicalName() {
47 return "ISO8859_1";
48 }
49
50 public boolean contains(Charset cs) {
51 return ((cs instanceof US_ASCII)
52 || (cs instanceof ISO_8859_1));
53 }
54
55 public CharsetDecoder newDecoder() {
56 return new Decoder(this);
57 }
58
59 public CharsetEncoder newEncoder() {
60 return new Encoder(this);
61 }
62
63 private static class Decoder extends CharsetDecoder {
64
65 private Decoder(Charset cs) {
66 super(cs, 1.0f, 1.0f);
67 }
68
69 private CoderResult decodeArrayLoop(ByteBuffer src,
70 CharBuffer dst)
71 {
72 byte[] sa = src.array();
73 int sp = src.arrayOffset() + src.position();
74 int sl = src.arrayOffset() + src.limit();
75 assert (sp <= sl);
76 sp = (sp <= sl ? sp : sl);
77 char[] da = dst.array();
78 int dp = dst.arrayOffset() + dst.position();
79 int dl = dst.arrayOffset() + dst.limit();
80 assert (dp <= dl);
81 dp = (dp <= dl ? dp : dl);
82
83 try {
84 while (sp < sl) {
85 byte b = sa[sp];
86 if (dp >= dl)
87 return CoderResult.OVERFLOW;
88 da[dp++] = (char)(b & 0xff);
89 sp++;
90 }
91 return CoderResult.UNDERFLOW;
92 } finally {
93 src.position(sp - src.arrayOffset());
94 dst.position(dp - dst.arrayOffset());
95 }
96 }
97
98 private CoderResult decodeBufferLoop(ByteBuffer src,
99 CharBuffer dst)
100 {
101 int mark = src.position();
102 try {
103 while (src.hasRemaining()) {
104 byte b = src.get();
105 if (!dst.hasRemaining())
106 return CoderResult.OVERFLOW;
107 dst.put((char)(b & 0xff));
108 mark++;
109 }
110 return CoderResult.UNDERFLOW;
111 } finally {
112 src.position(mark);
113 }
114 }
115
116 protected CoderResult decodeLoop(ByteBuffer src,
117 CharBuffer dst)
118 {
119 if (src.hasArray() && dst.hasArray())
120 return decodeArrayLoop(src, dst);
121 else
122 return decodeBufferLoop(src, dst);
123 }
124 }
125
126 private static class Encoder extends CharsetEncoder {
127
128 private Encoder(Charset cs) {
129 super(cs, 1.0f, 1.0f);
130 }
131
132 public boolean canEncode(char c) {
133 return c <= '\u00FF';
134 }
135
136 public boolean isLegalReplacement(byte[] repl) {
137 return true; // we accept any byte value
138 }
139
140 private final Surrogate.Parser sgp = new Surrogate.Parser();
141
142 // Method possible replaced with a compiler intrinsic.
143 private static int encodeISOArray(char[] sa, int sp,
144 byte[] da, int dp, int len) {
145 if (len <= 0) {
146 return 0;
147 }
148 encodeISOArrayCheck(sa, sp, da, dp, len);
149 return implEncodeISOArray(sa, sp, da, dp, len);
150 }
151
152 @HotSpotIntrinsicCandidate
153 private static int implEncodeISOArray(char[] sa, int sp,
154 byte[] da, int dp, int len)
155 {
156 int i = 0;
157 for (; i < len; i++) {
158 char c = sa[sp++];
159 if (c > '\u00FF')
160 break;
161 da[dp++] = (byte)c;
162 }
163 return i;
164 }
165
166 private static void encodeISOArrayCheck(char[] sa, int sp,
167 byte[] da, int dp, int len) {
168 Objects.requireNonNull(sa);
169 Objects.requireNonNull(da);
170
171 if (sp < 0 || sp >= sa.length) {
172 throw new ArrayIndexOutOfBoundsException(sp);
173 }
174
175 if (dp < 0 || dp >= da.length) {
176 throw new ArrayIndexOutOfBoundsException(dp);
177 }
178
179 int endIndexSP = sp + len - 1;
180 if (endIndexSP < 0 || endIndexSP >= sa.length) {
181 throw new ArrayIndexOutOfBoundsException(endIndexSP);
182 }
183
184 int endIndexDP = dp + len - 1;
185 if (endIndexDP < 0 || endIndexDP >= da.length) {
186 throw new ArrayIndexOutOfBoundsException(endIndexDP);
187 }
188 }
189
190 private CoderResult encodeArrayLoop(CharBuffer src,
191 ByteBuffer dst)
192 {
193 char[] sa = src.array();
194 int soff = src.arrayOffset();
195 int sp = soff + src.position();
196 int sl = soff + src.limit();
197 assert (sp <= sl);
198 sp = (sp <= sl ? sp : sl);
199 byte[] da = dst.array();
200 int doff = dst.arrayOffset();
201 int dp = doff + dst.position();
202 int dl = doff + dst.limit();
203 assert (dp <= dl);
204 dp = (dp <= dl ? dp : dl);
205 int dlen = dl - dp;
206 int slen = sl - sp;
207 int len = (dlen < slen) ? dlen : slen;
208 try {
209 int ret = encodeISOArray(sa, sp, da, dp, len);
210 sp = sp + ret;
211 dp = dp + ret;
212 if (ret != len) {
213 if (sgp.parse(sa[sp], sa, sp, sl) < 0)
214 return sgp.error();
215 return sgp.unmappableResult();
216 }
217 if (len < slen)
218 return CoderResult.OVERFLOW;
219 return CoderResult.UNDERFLOW;
220 } finally {
221 src.position(sp - soff);
222 dst.position(dp - doff);
223 }
224 }
225
226 private CoderResult encodeBufferLoop(CharBuffer src,
227 ByteBuffer dst)
228 {
229 int mark = src.position();
230 try {
231 while (src.hasRemaining()) {
232 char c = src.get();
233 if (c <= '\u00FF') {
234 if (!dst.hasRemaining())
235 return CoderResult.OVERFLOW;
236 dst.put((byte)c);
237 mark++;
238 continue;
239 }
240 if (sgp.parse(c, src) < 0)
241 return sgp.error();
242 return sgp.unmappableResult();
243 }
244 return CoderResult.UNDERFLOW;
245 } finally {
246 src.position(mark);
247 }
248 }
249
250 protected CoderResult encodeLoop(CharBuffer src,
251 ByteBuffer dst)
252 {
253 if (src.hasArray() && dst.hasArray())
254 return encodeArrayLoop(src, dst);
255 else
256 return encodeBufferLoop(src, dst);
257 }
258 }
259 }