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
43 public static final ISO_8859_1 INSTANCE = new ISO_8859_1();
44
45 public ISO_8859_1() {
46 super("ISO-8859-1", StandardCharsets.aliases_ISO_8859_1());
47 }
48
49 public String historicalName() {
50 return "ISO8859_1";
51 }
52
53 public boolean contains(Charset cs) {
54 return ((cs instanceof US_ASCII)
55 || (cs instanceof ISO_8859_1));
56 }
57
58 public CharsetDecoder newDecoder() {
59 return new Decoder(this);
60 }
61
62 public CharsetEncoder newEncoder() {
63 return new Encoder(this);
64 }
65
66 private static class Decoder extends CharsetDecoder
67 implements ArrayDecoder {
68 private Decoder(Charset cs) {
69 super(cs, 1.0f, 1.0f);
70 }
71
72 private CoderResult decodeArrayLoop(ByteBuffer src,
73 CharBuffer dst)
74 {
75 byte[] sa = src.array();
76 int sp = src.arrayOffset() + src.position();
77 int sl = src.arrayOffset() + src.limit();
78 assert (sp <= sl);
79 sp = (sp <= sl ? sp : sl);
80 char[] da = dst.array();
81 int dp = dst.arrayOffset() + dst.position();
82 int dl = dst.arrayOffset() + dst.limit();
83 assert (dp <= dl);
84 dp = (dp <= dl ? dp : dl);
85
86 try {
87 while (sp < sl) {
88 byte b = sa[sp];
89 if (dp >= dl)
90 return CoderResult.OVERFLOW;
91 da[dp++] = (char)(b & 0xff);
92 sp++;
93 }
94 return CoderResult.UNDERFLOW;
95 } finally {
96 src.position(sp - src.arrayOffset());
97 dst.position(dp - dst.arrayOffset());
98 }
99 }
100
101 private CoderResult decodeBufferLoop(ByteBuffer src,
102 CharBuffer dst)
103 {
104 int mark = src.position();
105 try {
106 while (src.hasRemaining()) {
107 byte b = src.get();
108 if (!dst.hasRemaining())
109 return CoderResult.OVERFLOW;
110 dst.put((char)(b & 0xff));
111 mark++;
112 }
113 return CoderResult.UNDERFLOW;
114 } finally {
115 src.position(mark);
116 }
117 }
118
119 protected CoderResult decodeLoop(ByteBuffer src,
120 CharBuffer dst)
121 {
122 if (src.hasArray() && dst.hasArray())
123 return decodeArrayLoop(src, dst);
124 else
125 return decodeBufferLoop(src, dst);
126 }
127
128 public int decode(byte[] src, int sp, int len, char[] dst) {
129 if (len > dst.length)
130 len = dst.length;
131 int dp = 0;
132 while (dp < len)
133 dst[dp++] = (char)(src[sp++] & 0xff);
134 return dp;
135 }
136
137 public boolean isASCIICompatible() {
138 return true;
139 }
140 }
141
142 private static class Encoder extends CharsetEncoder
143 implements ArrayEncoder {
144 private Encoder(Charset cs) {
145 super(cs, 1.0f, 1.0f);
146 }
147
148 public boolean canEncode(char c) {
149 return c <= '\u00FF';
150 }
151
152 public boolean isLegalReplacement(byte[] repl) {
153 return true; // we accept any byte value
154 }
155
156 private final Surrogate.Parser sgp = new Surrogate.Parser();
157
158 // Method possible replaced with a compiler intrinsic.
159 private static int encodeISOArray(char[] sa, int sp,
160 byte[] da, int dp, int len) {
161 if (len <= 0) {
162 return 0;
163 }
164 encodeISOArrayCheck(sa, sp, da, dp, len);
165 return implEncodeISOArray(sa, sp, da, dp, len);
166 }
167
168 @HotSpotIntrinsicCandidate
169 private static int implEncodeISOArray(char[] sa, int sp,
170 byte[] da, int dp, int len)
171 {
172 int i = 0;
173 for (; i < len; i++) {
174 char c = sa[sp++];
175 if (c > '\u00FF')
176 break;
177 da[dp++] = (byte)c;
178 }
179 return i;
180 }
181
182 private static void encodeISOArrayCheck(char[] sa, int sp,
183 byte[] da, int dp, int len) {
184 Objects.requireNonNull(sa);
185 Objects.requireNonNull(da);
186
187 if (sp < 0 || sp >= sa.length) {
188 throw new ArrayIndexOutOfBoundsException(sp);
189 }
190
191 if (dp < 0 || dp >= da.length) {
192 throw new ArrayIndexOutOfBoundsException(dp);
193 }
194
195 int endIndexSP = sp + len - 1;
196 if (endIndexSP < 0 || endIndexSP >= sa.length) {
197 throw new ArrayIndexOutOfBoundsException(endIndexSP);
198 }
199
200 int endIndexDP = dp + len - 1;
201 if (endIndexDP < 0 || endIndexDP >= da.length) {
202 throw new ArrayIndexOutOfBoundsException(endIndexDP);
203 }
204 }
205
206 private CoderResult encodeArrayLoop(CharBuffer src,
207 ByteBuffer dst)
208 {
209 char[] sa = src.array();
210 int soff = src.arrayOffset();
211 int sp = soff + src.position();
212 int sl = soff + src.limit();
213 assert (sp <= sl);
214 sp = (sp <= sl ? sp : sl);
215 byte[] da = dst.array();
216 int doff = dst.arrayOffset();
217 int dp = doff + dst.position();
218 int dl = doff + dst.limit();
219 assert (dp <= dl);
220 dp = (dp <= dl ? dp : dl);
221 int dlen = dl - dp;
222 int slen = sl - sp;
223 int len = (dlen < slen) ? dlen : slen;
224 try {
225 int ret = encodeISOArray(sa, sp, da, dp, len);
226 sp = sp + ret;
227 dp = dp + ret;
228 if (ret != len) {
229 if (sgp.parse(sa[sp], sa, sp, sl) < 0)
230 return sgp.error();
231 return sgp.unmappableResult();
232 }
233 if (len < slen)
234 return CoderResult.OVERFLOW;
235 return CoderResult.UNDERFLOW;
236 } finally {
237 src.position(sp - soff);
238 dst.position(dp - doff);
239 }
240 }
241
242 private CoderResult encodeBufferLoop(CharBuffer src,
243 ByteBuffer dst)
244 {
245 int mark = src.position();
246 try {
247 while (src.hasRemaining()) {
248 char c = src.get();
249 if (c <= '\u00FF') {
250 if (!dst.hasRemaining())
251 return CoderResult.OVERFLOW;
252 dst.put((byte)c);
253 mark++;
254 continue;
255 }
256 if (sgp.parse(c, src) < 0)
257 return sgp.error();
258 return sgp.unmappableResult();
259 }
260 return CoderResult.UNDERFLOW;
261 } finally {
262 src.position(mark);
263 }
264 }
265
266 protected CoderResult encodeLoop(CharBuffer src,
267 ByteBuffer dst)
268 {
269 if (src.hasArray() && dst.hasArray())
270 return encodeArrayLoop(src, dst);
271 else
272 return encodeBufferLoop(src, dst);
273 }
274
275 private byte repl = (byte)'?';
276 protected void implReplaceWith(byte[] newReplacement) {
277 repl = newReplacement[0];
278 }
279
280 public int encode(char[] src, int sp, int len, byte[] dst) {
281 int dp = 0;
282 int slen = Math.min(len, dst.length);
283 int sl = sp + slen;
284 while (sp < sl) {
285 int ret = encodeISOArray(src, sp, dst, dp, slen);
286 sp = sp + ret;
287 dp = dp + ret;
288 if (ret != slen) {
289 char c = src[sp++];
290 if (Character.isHighSurrogate(c) && sp < sl &&
291 Character.isLowSurrogate(src[sp])) {
292 if (len > dst.length) {
293 sl++;
294 len--;
295 }
296 sp++;
297 }
298 dst[dp++] = repl;
299 slen = Math.min((sl - sp), (dst.length - dp));
300 }
301 }
302 return dp;
303 }
304
305 public boolean isASCIICompatible() {
306 return true;
307 }
308 }
309 }