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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libjava/] [classpath/] [java/] [nio/] [ByteBufferHelper.java] - Blame information for rev 14

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1 14 jlechner 
/* ByteBufferImpl.java --
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   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
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4 
This file is part of GNU Classpath.
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6 
GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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11 
GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 
General Public License for more details.
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16 
You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
18 
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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21 
Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
23 
conditions of the GNU General Public License cover the whole
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combination.
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26 
As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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38 
package java.nio;
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40 
/**
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 * @author Michael Koch (konqueror@gmx.de)
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 */
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final class ByteBufferHelper
44 
{
45 
  public static char getChar (ByteBuffer buffer, ByteOrder order)
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  {
47 
    return (char) getShort (buffer, order);
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  }
49 
 
50 
  public static void putChar (ByteBuffer buffer, char value, ByteOrder order)
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  {
52 
    putShort (buffer, (short) value, order);
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  }
54 
 
55 
  public static char getChar (ByteBuffer buffer, int index, ByteOrder order)
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  {
57 
    return (char) getShort (buffer, index, order);
58 
  }
59 
 
60 
  public static void putChar (ByteBuffer buffer, int index,
61 
                              char value, ByteOrder order)
62 
  {
63 
    putShort (buffer, index, (short) value, order);
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  }
65 
 
66 
  public static short getShort (ByteBuffer buffer, ByteOrder order)
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  {
68 
    buffer.checkForUnderflow(2);
69 
 
70 
    if (order == ByteOrder.LITTLE_ENDIAN)
71 
      {
72 
        return (short) ((buffer.get() & 0xff)
73 
                        + (buffer.get() << 8));
74 
      }
75 
 
76 
    return (short) ((buffer.get() << 8)
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                    + (buffer.get() & 0xff));
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  }
79 
 
80 
  public static void putShort (ByteBuffer buffer, short value, ByteOrder order)
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  {
82 
    buffer.checkForOverflow(2);
83 
 
84 
    if (order == ByteOrder.LITTLE_ENDIAN)
85 
      {
86 
        buffer.put ((byte) value);
87 
        buffer.put ((byte) (value >> 8));
88 
      }
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    else
90 
      {
91 
        buffer.put ((byte) (value >> 8));
92 
        buffer.put ((byte) value);
93 
      }
94 
  }
95 
 
96 
  public static short getShort (ByteBuffer buffer,
97 
                                      int index, ByteOrder order)
98 
  {
99 
    if (order == ByteOrder.LITTLE_ENDIAN)
100 
      {
101 
        return (short) ((buffer.get (index) & 0xff)
102 
                        + (buffer.get (++index) << 8));
103 
      }
104 
 
105 
    return (short) ((buffer.get (index) << 8)
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                    + (buffer.get (++index) & 0xff));
107 
  }
108 
 
109 
  public static void putShort (ByteBuffer buffer, int index,
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                               short value, ByteOrder order)
111 
  {
112 
    if (order == ByteOrder.LITTLE_ENDIAN)
113 
      {
114 
        buffer.put (index, (byte) value);
115 
        buffer.put (++index, (byte) (value >> 8));
116 
      }
117 
    else
118 
      {
119 
        buffer.put (index, (byte) (value >> 8));
120 
        buffer.put (++index, (byte) value);
121 
      }
122 
  }
123 
 
124 
  public static int getInt (ByteBuffer buffer, ByteOrder order)
125 
  {
126 
    buffer.checkForUnderflow(4);
127 
 
128 
    if (order == ByteOrder.LITTLE_ENDIAN)
129 
      {
130 
        return ((buffer.get() & 0xff)
131 
                + ((buffer.get() & 0xff) << 8)
132 
                + ((buffer.get() & 0xff) << 16)
133 
                + (buffer.get() << 24));
134 
      }
135 
 
136 
    return (int) ((buffer.get() << 24)
137 
                  + ((buffer.get() & 0xff) << 16)
138 
                  + ((buffer.get() & 0xff) << 8)
139 
                  + (buffer.get() & 0xff));
140 
  }
141 
 
142 
  public static void putInt (ByteBuffer buffer, int value, ByteOrder order)
143 
  {
144 
    buffer.checkForOverflow(4);
145 
 
146 
    if (order == ByteOrder.LITTLE_ENDIAN)
147 
      {
148 
        buffer.put ((byte) value);
149 
        buffer.put ((byte) (value >> 8));
150 
        buffer.put ((byte) (value >> 16));
151 
        buffer.put ((byte) (value >> 24));
152 
      }
153 
    else
154 
      {
155 
        buffer.put ((byte) (value >> 24));
156 
        buffer.put ((byte) (value >> 16));
157 
        buffer.put ((byte) (value >> 8));
158 
        buffer.put ((byte) value);
159 
      }
160 
  }
161 
 
162 
  public static int getInt (ByteBuffer buffer, int index, ByteOrder order)
163 
  {
164 
    if (order == ByteOrder.LITTLE_ENDIAN)
165 
      {
166 
        return ((buffer.get (index) & 0xff)
167 
                + ((buffer.get (++index) & 0xff) << 8)
168 
                + ((buffer.get (++index) & 0xff) << 16)
169 
                + (buffer.get (++index) << 24));
170 
      }
171 
 
172 
    return ((buffer.get (index) << 24)
173 
            + ((buffer.get (++index) & 0xff) << 16)
174 
            + ((buffer.get (++index) & 0xff) << 8)
175 
            + (buffer.get (++index) & 0xff));
176 
  }
177 
 
178 
  public static void putInt (ByteBuffer buffer, int index,
179 
                                   int value, ByteOrder order)
180 
  {
181 
    if (order == ByteOrder.LITTLE_ENDIAN)
182 
      {
183 
        buffer.put (index, (byte) value);
184 
        buffer.put (++index, (byte) (value >> 8));
185 
        buffer.put (++index, (byte) (value >> 16));
186 
        buffer.put (++index, (byte) (value >> 24));
187 
      }
188 
    else
189 
      {
190 
        buffer.put (index, (byte) (value >> 24));
191 
        buffer.put (++index, (byte) (value >> 16));
192 
        buffer.put (++index, (byte) (value >> 8));
193 
        buffer.put (++index, (byte) value);
194 
      }
195 
  }
196 
 
197 
  public static long getLong (ByteBuffer buffer, ByteOrder order)
198 
  {
199 
    buffer.checkForUnderflow(8);
200 
 
201 
    if (order == ByteOrder.LITTLE_ENDIAN)
202 
      {
203 
        return ((buffer.get() & 0xff)
204 
                + (((buffer.get() & 0xff)) << 8)
205 
                + (((buffer.get() & 0xff)) << 16)
206 
                + (((buffer.get() & 0xffL)) << 24)
207 
                + (((buffer.get() & 0xffL)) << 32)
208 
                + (((buffer.get() & 0xffL)) << 40)
209 
                + (((buffer.get() & 0xffL)) << 48)
210 
                + (((long) buffer.get()) << 56));
211 
      }
212 
 
213 
    return ((((long) buffer.get()) << 56)
214 
            + ((buffer.get() & 0xffL) << 48)
215 
            + ((buffer.get() & 0xffL) << 40)
216 
            + ((buffer.get() & 0xffL) << 32)
217 
            + ((buffer.get() & 0xffL) << 24)
218 
            + ((buffer.get() & 0xff) << 16)
219 
            + ((buffer.get() & 0xff) << 8)
220 
            + (buffer.get() & 0xff));
221 
  }
222 
 
223 
  public static void putLong (ByteBuffer buffer, long value, ByteOrder order)
224 
  {
225 
    buffer.checkForOverflow(8);
226 
 
227 
    if (order == ByteOrder.LITTLE_ENDIAN)
228 
      {
229 
        buffer.put ((byte) value);
230 
        buffer.put ((byte) (value >> 8));
231 
        buffer.put ((byte) (value >> 16));
232 
        buffer.put ((byte) (value >> 24));
233 
        buffer.put ((byte) (value >> 32));
234 
        buffer.put ((byte) (value >> 40));
235 
        buffer.put ((byte) (value >> 48));
236 
        buffer.put ((byte) (value >> 56));
237 
      }
238 
    else
239 
      {
240 
        buffer.put ((byte) (value >> 56));
241 
        buffer.put ((byte) (value >> 48));
242 
        buffer.put ((byte) (value >> 40));
243 
        buffer.put ((byte) (value >> 32));
244 
        buffer.put ((byte) (value >> 24));
245 
        buffer.put ((byte) (value >> 16));
246 
        buffer.put ((byte) (value >> 8));
247 
        buffer.put ((byte) value);
248 
      }
249 
  }
250 
 
251 
  public static long getLong (ByteBuffer buffer, int index, ByteOrder order)
252 
  {
253 
    if (order == ByteOrder.LITTLE_ENDIAN)
254 
      {
255 
        return ((buffer.get (index) & 0xff)
256 
                + ((buffer.get (++index) & 0xff) << 8)
257 
                + ((buffer.get (++index) & 0xff) << 16)
258 
                + ((buffer.get (++index) & 0xffL) << 24)
259 
                + ((buffer.get (++index) & 0xffL) << 32)
260 
                + ((buffer.get (++index) & 0xffL) << 40)
261 
                + ((buffer.get (++index) & 0xffL) << 48)
262 
                + (((long) buffer.get (++index)) << 56));
263 
      }
264 
 
265 
    return ((((long) buffer.get (index)) << 56)
266 
            + ((buffer.get (++index) & 0xffL) << 48)
267 
            + ((buffer.get (++index) & 0xffL) << 40)
268 
            + ((buffer.get (++index) & 0xffL) << 32)
269 
            + ((buffer.get (++index) & 0xffL) << 24)
270 
            + ((buffer.get (++index) & 0xff) << 16)
271 
            + ((buffer.get (++index) & 0xff) << 8)
272 
            + (buffer.get (++index) & 0xff));
273 
  }
274 
 
275 
  public static void putLong (ByteBuffer buffer, int index,
276 
                                    long value, ByteOrder order)
277 
  {
278 
    if (order == ByteOrder.LITTLE_ENDIAN)
279 
      {
280 
        buffer.put (index, (byte) value);
281 
        buffer.put (++index, (byte) (value >> 8));
282 
        buffer.put (++index, (byte) (value >> 16));
283 
        buffer.put (++index, (byte) (value >> 24));
284 
        buffer.put (++index, (byte) (value >> 32));
285 
        buffer.put (++index, (byte) (value >> 40));
286 
        buffer.put (++index, (byte) (value >> 48));
287 
        buffer.put (++index, (byte) (value >> 56));
288 
      }
289 
    else
290 
      {
291 
        buffer.put (index, (byte) (value >> 56));
292 
        buffer.put (++index, (byte) (value >> 48));
293 
        buffer.put (++index, (byte) (value >> 40));
294 
        buffer.put (++index, (byte) (value >> 32));
295 
        buffer.put (++index, (byte) (value >> 24));
296 
        buffer.put (++index, (byte) (value >> 16));
297 
        buffer.put (++index, (byte) (value >> 8));
298 
        buffer.put (++index, (byte) value);
299 
      }
300 
  }
301 
 
302 
  public static float getFloat (ByteBuffer buffer, ByteOrder order)
303 
  {
304 
    return Float.intBitsToFloat (getInt (buffer, order));
305 
  }
306 
 
307 
  public static void putFloat (ByteBuffer buffer, float value, ByteOrder order)
308 
  {
309 
    putInt (buffer, Float.floatToRawIntBits (value), order);
310 
  }
311 
 
312 
  public static float getFloat (ByteBuffer buffer, int index, ByteOrder order)
313 
  {
314 
    return Float.intBitsToFloat (getInt (buffer, index, order));
315 
  }
316 
 
317 
  public static void putFloat (ByteBuffer buffer, int index,
318 
                                     float value, ByteOrder order)
319 
  {
320 
    putInt (buffer, index, Float.floatToRawIntBits (value), order);
321 
  }
322 
 
323 
  public static double getDouble (ByteBuffer buffer, ByteOrder order)
324 
  {
325 
    return Double.longBitsToDouble (getLong (buffer, order));
326 
  }
327 
 
328 
  public static void putDouble (ByteBuffer buffer, double value, ByteOrder order)
329 
  {
330 
    putLong (buffer, Double.doubleToRawLongBits (value), order);
331 
  }
332 
 
333 
  public static double getDouble (ByteBuffer buffer, int index, ByteOrder order)
334 
  {
335 
    return Double.longBitsToDouble (getLong (buffer, index, order));
336 
  }
337 
 
338 
  public static void putDouble (ByteBuffer buffer, int index,
339 
                                double value, ByteOrder order)
340 
  {
341 
    putLong (buffer, index, Double.doubleToRawLongBits (value), order);
342 
  }
343 
} // ByteBufferHelper
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