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 import java.util.Objects;
36
37 import jdk.internal.HotSpotIntrinsicCandidate;
38
39 class ISO_8859_1
40 extends Charset
41 implements HistoricallyNamedCharset
42 {
43
44 public ISO_8859_1() {
45 super("ISO-8859-1", StandardCharsets.aliases_ISO_8859_1);
46 }
47
48 public String historicalName() {
49 return "ISO8859_1";
50 }
51
52 public boolean contains(Charset cs) {
53 return ((cs instanceof US_ASCII)
54 || (cs instanceof ISO_8859_1));
55 }
56
57 public CharsetDecoder newDecoder() {
58 return new Decoder(this);
59 }
60
61 public CharsetEncoder newEncoder() {
62 return new Encoder(this);
63 }
64
65 private static class Decoder extends CharsetDecoder
66 implements ArrayDecoder {
67 private Decoder(Charset cs) {
68 super(cs, 1.0f, 1.0f);
69 }
70
71 private CoderResult decodeArrayLoop(ByteBuffer src,
72 CharBuffer dst)
73 {
74 byte[] sa = src.array();
75 int sp = src.arrayOffset() + src.position();
76 int sl = src.arrayOffset() + src.limit();
77 assert (sp <= sl);
78 sp = (sp <= sl ? sp : sl);
79 char[] da = dst.array();
80 int dp = dst.arrayOffset() + dst.position();
81 int dl = dst.arrayOffset() + dst.limit();
82 assert (dp <= dl);
83 dp = (dp <= dl ? dp : dl);
84
85 try {
86 while (sp < sl) {
87 byte b = sa[sp];
88 if (dp >= dl)
89 return CoderResult.OVERFLOW;
90 da[dp++] = (char)(b & 0xff);
91 sp++;
92 }
93 return CoderResult.UNDERFLOW;
94 } finally {
95 src.position(sp - src.arrayOffset());
96 dst.position(dp - dst.arrayOffset());
97 }
98 }
99
100 private CoderResult decodeBufferLoop(ByteBuffer src,
101 CharBuffer dst)
102 {
103 int mark = src.position();
104 try {
105 while (src.hasRemaining()) {
106 byte b = src.get();
107 if (!dst.hasRemaining())
108 return CoderResult.OVERFLOW;
109 dst.put((char)(b & 0xff));
110 mark++;
111 }
112 return CoderResult.UNDERFLOW;
113 } finally {
114 src.position(mark);
115 }
116 }
117
118 protected CoderResult decodeLoop(ByteBuffer src,
119 CharBuffer dst)
120 {
121 if (src.hasArray() && dst.hasArray())
122 return decodeArrayLoop(src, dst);
123 else
124 return decodeBufferLoop(src, dst);
125 }
126
127 public int decode(byte[] src, int sp, int len, char[] dst) {
128 if (len > dst.length)
129 len = dst.length;
130 int dp = 0;
131 while (dp < len)
132 dst[dp++] = (char)(src[sp++] & 0xff);
133 return dp;
134 }
135 }
136
137 private static class Encoder extends CharsetEncoder
138 implements ArrayEncoder {
139 private Encoder(Charset cs) {
140 super(cs, 1.0f, 1.0f);
141 }
142
143 public boolean canEncode(char c) {
144 return c <= '\u00FF';
145 }
146
147 public boolean isLegalReplacement(byte[] repl) {
148 return true; // we accept any byte value
149 }
150
151 private final Surrogate.Parser sgp = new Surrogate.Parser();
152
153 // Method possible replaced with a compiler intrinsic.
154 private static int encodeISOArray(char[] sa, int sp,
155 byte[] da, int dp, int len) {
156 encodeISOArrayCheck(sa, sp, da, dp, len);
157 return implEncodeISOArray(sa, sp, da, dp, len);
158 }
159
160 @HotSpotIntrinsicCandidate
161 private static int implEncodeISOArray(char[] sa, int sp,
162 byte[] da, int dp, int len)
163 {
164 int i = 0;
165 for (; i < len; i++) {
166 char c = sa[sp++];
167 if (c > '\u00FF')
168 break;
169 da[dp++] = (byte)c;
170 }
171 return i;
172 }
173
174 private static void encodeISOArrayCheck(char[] sa, int sp,
175 byte[] da, int dp, int len) {
176 if (len <= 0) {
177 return; // not an error because encodeISOArrayImpl won't execute if len <= 0
178 }
179
180 Objects.requireNonNull(sa);
181 Objects.requireNonNull(da);
182
183 if (sp < 0 || sp >= sa.length) {
184 throw new ArrayIndexOutOfBoundsException(sp);
185 }
186
187 if (dp < 0 || dp >= da.length) {
188 throw new ArrayIndexOutOfBoundsException(dp);
189 }
190
191 int endIndexSP = sp + len - 1;
192 if (endIndexSP < 0 || endIndexSP >= sa.length) {
193 throw new ArrayIndexOutOfBoundsException(endIndexSP);
194 }
195
196 int endIndexDP = dp + len - 1;
197 if (endIndexDP < 0 || endIndexDP >= da.length) {
198 throw new ArrayIndexOutOfBoundsException(endIndexDP);
199 }
200 }
201
202 private CoderResult encodeArrayLoop(CharBuffer src,
203 ByteBuffer dst)
204 {
205 char[] sa = src.array();
206 int soff = src.arrayOffset();
207 int sp = soff + src.position();
208 int sl = soff + src.limit();
209 assert (sp <= sl);
210 sp = (sp <= sl ? sp : sl);
211 byte[] da = dst.array();
212 int doff = dst.arrayOffset();
213 int dp = doff + dst.position();
214 int dl = doff + dst.limit();
215 assert (dp <= dl);
216 dp = (dp <= dl ? dp : dl);
217 int dlen = dl - dp;
218 int slen = sl - sp;
219 int len = (dlen < slen) ? dlen : slen;
220 try {
221 int ret = encodeISOArray(sa, sp, da, dp, len);
222 sp = sp + ret;
223 dp = dp + ret;
224 if (ret != len) {
225 if (sgp.parse(sa[sp], sa, sp, sl) < 0)
226 return sgp.error();
227 return sgp.unmappableResult();
228 }
229 if (len < slen)
230 return CoderResult.OVERFLOW;
231 return CoderResult.UNDERFLOW;
232 } finally {
233 src.position(sp - soff);
234 dst.position(dp - doff);
235 }
236 }
237
238 private CoderResult encodeBufferLoop(CharBuffer src,
239 ByteBuffer dst)
240 {
241 int mark = src.position();
242 try {
243 while (src.hasRemaining()) {
244 char c = src.get();
245 if (c <= '\u00FF') {
246 if (!dst.hasRemaining())
247 return CoderResult.OVERFLOW;
248 dst.put((byte)c);
249 mark++;
250 continue;
251 }
252 if (sgp.parse(c, src) < 0)
253 return sgp.error();
254 return sgp.unmappableResult();
255 }
256 return CoderResult.UNDERFLOW;
257 } finally {
258 src.position(mark);
259 }
260 }
261
262 protected CoderResult encodeLoop(CharBuffer src,
263 ByteBuffer dst)
264 {
265 if (src.hasArray() && dst.hasArray())
266 return encodeArrayLoop(src, dst);
267 else
268 return encodeBufferLoop(src, dst);
269 }
270
271 private byte repl = (byte)'?';
272 protected void implReplaceWith(byte[] newReplacement) {
273 repl = newReplacement[0];
274 }
275
276 public int encode(char[] src, int sp, int len, byte[] dst) {
277 int dp = 0;
278 int slen = Math.min(len, dst.length);
279 int sl = sp + slen;
280 while (sp < sl) {
281 int ret = encodeISOArray(src, sp, dst, dp, slen);
282 sp = sp + ret;
283 dp = dp + ret;
284 if (ret != slen) {
285 char c = src[sp++];
286 if (Character.isHighSurrogate(c) && sp < sl &&
287 Character.isLowSurrogate(src[sp])) {
288 if (len > dst.length) {
289 sl++;
290 len--;
291 }
292 sp++;
293 }
294 dst[dp++] = repl;
295 slen = Math.min((sl - sp), (dst.length - dp));
296 }
297 }
298 return dp;
299 }
300 }
301 }