J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.X11; |
| 27 | |
| 28 | import sun.misc.Unsafe; |
| 29 | import java.util.Vector; |
| 30 | import java.security.AccessController; |
| 31 | import java.security.PrivilegedAction; |
| 32 | |
| 33 | /** |
| 34 | * This class contains the collection of utility functions to help work with |
| 35 | * native data types on different platforms similarly. |
| 36 | */ |
| 37 | |
| 38 | class Native { |
| 39 | |
| 40 | private static Unsafe unsafe = XlibWrapper.unsafe; |
| 41 | |
| 42 | static int longSize; |
| 43 | |
| 44 | static int dataModel; |
| 45 | static { |
| 46 | String dataModelProp = (String)AccessController. |
| 47 | doPrivileged( |
| 48 | new PrivilegedAction() { |
| 49 | public Object run() { |
| 50 | return System.getProperty("sun.arch.data.model"); |
| 51 | } |
| 52 | }); |
| 53 | try { |
| 54 | dataModel = Integer.parseInt(dataModelProp); |
| 55 | } catch (Exception e) { |
| 56 | dataModel = 32; |
| 57 | } |
| 58 | if (dataModel == 32) { |
| 59 | longSize = 4; |
| 60 | } else { |
| 61 | longSize = 8; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Set of helper function to read data of different PLATFORM types |
| 67 | * from memory pointer by <code>ptr</code> |
| 68 | * Note, names of types in function are NATIVE PLATFORM types |
| 69 | * and they have the same size as they would have in C compiler |
| 70 | * on the same platform. |
| 71 | */ |
| 72 | |
| 73 | static boolean getBool(long ptr) { return getInt(ptr) != 0; } |
| 74 | static boolean getBool(long ptr, int index) { return getInt(ptr, index) != 0; } |
| 75 | static void putBool(long ptr, boolean data) { putInt(ptr, (data)?(1):(0)); } |
| 76 | static void putBool(long ptr, int index, boolean data) { putInt(ptr, index, (data)?(1):(0)); } |
| 77 | |
| 78 | |
| 79 | /** |
| 80 | * Access to C byte data(one byte) |
| 81 | */ |
| 82 | static int getByteSize() { return 1; } |
| 83 | static byte getByte(long ptr) { return unsafe.getByte(ptr); } |
| 84 | |
| 85 | static byte getByte(long ptr, int index) { |
| 86 | return getByte(ptr+index); |
| 87 | } |
| 88 | /** |
| 89 | * Stores to C byte data(one byte) |
| 90 | */ |
| 91 | static void putByte(long ptr, byte data) { unsafe.putByte(ptr, data); } |
| 92 | |
| 93 | static void putByte(long ptr, int index, byte data) { |
| 94 | putByte(ptr+index, data); |
| 95 | } |
| 96 | /** |
| 97 | * Converts length bytes of data pointed by <code>data</code> into byte array |
| 98 | * Returns null if data is zero |
| 99 | * @param data native pointer to native memory |
| 100 | * @param length size in bytes of native memory |
| 101 | */ |
| 102 | static byte[] toBytes(long data, int length) { |
| 103 | if (data == 0) { |
| 104 | return null; |
| 105 | } |
| 106 | byte[] res = new byte[length]; |
| 107 | for (int i = 0; i < length; i++, data++) { |
| 108 | res[i] = getByte(data); |
| 109 | } |
| 110 | return res; |
| 111 | } |
| 112 | /** |
| 113 | * Stores byte array into native memory and returns pointer to this memory |
| 114 | * Returns 0 if bytes is null |
| 115 | */ |
| 116 | static long toData(byte[] bytes) { |
| 117 | if (bytes == null) { |
| 118 | return 0; |
| 119 | } |
| 120 | long res = XlibWrapper.unsafe.allocateMemory(bytes.length); |
| 121 | for (int i = 0; i < bytes.length; i++) { |
| 122 | putByte(res+i, bytes[i]); |
| 123 | } |
| 124 | return res; |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Access to C unsigned byte data(one byte) |
| 129 | */ |
| 130 | static int getUByteSize() { return 1; } |
| 131 | static short getUByte(long ptr) { return (short)(0xFF & unsafe.getByte(ptr)); } |
| 132 | |
| 133 | static short getUByte(long ptr, int index) { |
| 134 | return getUByte(ptr+index); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Stores to C unsigned byte data(one byte) |
| 139 | */ |
| 140 | static void putUByte(long ptr, short data) { unsafe.putByte(ptr, (byte)data); } |
| 141 | |
| 142 | static void putUByte(long ptr, int index, short data) { |
| 143 | putUByte(ptr+index, data); |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Converts length usnigned bytes of data pointed by <code>data</code> into |
| 148 | * short array |
| 149 | * Returns null if data is zero |
| 150 | * @param data native pointer to native memory |
| 151 | * @param length size in bytes of native memory |
| 152 | */ |
| 153 | static short[] toUBytes(long data, int length) { |
| 154 | if (data == 0) { |
| 155 | return null; |
| 156 | } |
| 157 | short[] res = new short[length]; |
| 158 | for (int i = 0; i < length; i++, data++) { |
| 159 | res[i] = getUByte(data); |
| 160 | } |
| 161 | return res; |
| 162 | } |
| 163 | /** |
| 164 | * Stores short array as unsigned bytes into native memory and returns pointer |
| 165 | * to this memory |
| 166 | * Returns 0 if bytes is null |
| 167 | */ |
| 168 | static long toUData(short[] bytes) { |
| 169 | if (bytes == null) { |
| 170 | return 0; |
| 171 | } |
| 172 | long res = XlibWrapper.unsafe.allocateMemory(bytes.length); |
| 173 | for (int i = 0; i < bytes.length; i++) { |
| 174 | putUByte(res+i, bytes[i]); |
| 175 | } |
| 176 | return res; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Access to C short data(two bytes) |
| 181 | */ |
| 182 | static int getShortSize() { return 2; } |
| 183 | static short getShort(long ptr) { return unsafe.getShort(ptr); } |
| 184 | /** |
| 185 | * Stores to C short data(two bytes) |
| 186 | */ |
| 187 | static void putShort(long ptr, short data) { unsafe.putShort(ptr, data); } |
| 188 | static void putShort(long ptr, int index, short data) { |
| 189 | putShort(ptr + index*getShortSize(), data); |
| 190 | } |
| 191 | static long toData(short[] shorts) { |
| 192 | if (shorts == null) { |
| 193 | return 0; |
| 194 | } |
| 195 | long res = XlibWrapper.unsafe.allocateMemory(shorts.length*getShortSize()); |
| 196 | for (int i = 0; i < shorts.length; i++) { |
| 197 | putShort(res, i, shorts[i]); |
| 198 | } |
| 199 | return res; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Access to C unsigned short data(two bytes) |
| 204 | */ |
| 205 | static int getUShortSize() { return 2; } |
| 206 | |
| 207 | static int getUShort(long ptr) { return 0xFFFF & unsafe.getShort(ptr); } |
| 208 | /** |
| 209 | * Stores to C unsigned short data(two bytes) |
| 210 | */ |
| 211 | static void putUShort(long ptr, int data) { unsafe.putShort(ptr, (short)data); } |
| 212 | static void putUShort(long ptr, int index, int data) { |
| 213 | putUShort(ptr + index*getShortSize(), data); |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Stores int array as unsigned shorts into native memory and returns pointer |
| 218 | * to this memory |
| 219 | * Returns 0 if bytes is null |
| 220 | */ |
| 221 | static long toUData(int[] shorts) { |
| 222 | if (shorts == null) { |
| 223 | return 0; |
| 224 | } |
| 225 | long res = XlibWrapper.unsafe.allocateMemory(shorts.length*getShortSize()); |
| 226 | for (int i = 0; i < shorts.length; i++) { |
| 227 | putUShort(res, i, shorts[i]); |
| 228 | } |
| 229 | return res; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Access to C int data(four bytes) |
| 234 | */ |
| 235 | static int getIntSize() { return 4; } |
| 236 | static int getInt(long ptr) { return unsafe.getInt(ptr); } |
| 237 | static int getInt(long ptr, int index) { return getInt(ptr +getIntSize()*index); } |
| 238 | /** |
| 239 | * Stores to C int data(four bytes) |
| 240 | */ |
| 241 | static void putInt(long ptr, int data) { unsafe.putInt(ptr, data); } |
| 242 | static void putInt(long ptr, int index, int data) { |
| 243 | putInt(ptr + index*getIntSize(), data); |
| 244 | } |
| 245 | static long toData(int[] ints) { |
| 246 | if (ints == null) { |
| 247 | return 0; |
| 248 | } |
| 249 | long res = XlibWrapper.unsafe.allocateMemory(ints.length*getIntSize()); |
| 250 | for (int i = 0; i < ints.length; i++) { |
| 251 | putInt(res, i, ints[i]); |
| 252 | } |
| 253 | return res; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Access to C unsigned int data(four bytes) |
| 258 | */ |
| 259 | static int getUIntSize() { return 4; } |
| 260 | static long getUInt(long ptr) { return 0xFFFFFFFFL & unsafe.getInt(ptr); } |
| 261 | static long getUInt(long ptr, int index) { return getUInt(ptr +getIntSize()*index); } |
| 262 | /** |
| 263 | * Stores to C unsigned int data(four bytes) |
| 264 | */ |
| 265 | static void putUInt(long ptr, long data) { unsafe.putInt(ptr, (int)data); } |
| 266 | static void putUInt(long ptr, int index, long data) { |
| 267 | putUInt(ptr + index*getIntSize(), data); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Stores long array as unsigned intss into native memory and returns pointer |
| 272 | * to this memory |
| 273 | * Returns 0 if bytes is null |
| 274 | */ |
| 275 | static long toUData(long[] ints) { |
| 276 | if (ints == null) { |
| 277 | return 0; |
| 278 | } |
| 279 | long res = XlibWrapper.unsafe.allocateMemory(ints.length*getIntSize()); |
| 280 | for (int i = 0; i < ints.length; i++) { |
| 281 | putUInt(res, i, ints[i]); |
| 282 | } |
| 283 | return res; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Access to C long data(size depends on platform) |
| 288 | */ |
| 289 | static int getLongSize() { |
| 290 | return longSize; |
| 291 | } |
| 292 | static long getLong(long ptr) { |
| 293 | if (XlibWrapper.dataModel == 32) { |
| 294 | return unsafe.getInt(ptr); |
| 295 | } else { |
| 296 | return unsafe.getLong(ptr); |
| 297 | } |
| 298 | } |
| 299 | /** |
| 300 | * Stores to C long data(four bytes) |
| 301 | * Note: <code>data</code> has <code>long</code> type |
| 302 | * to be able to keep 64-bit C <code>long</code> data |
| 303 | */ |
| 304 | static void putLong(long ptr, long data) { |
| 305 | if (XlibWrapper.dataModel == 32) { |
| 306 | unsafe.putInt(ptr, (int)data); |
| 307 | } else { |
| 308 | unsafe.putLong(ptr, data); |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | static void putLong(long ptr, int index, long data) { |
| 313 | putLong(ptr+index*getLongSize(), data); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Returns index's element of the array of native long pointed by ptr |
| 318 | */ |
| 319 | static long getLong(long ptr, int index) { |
| 320 | return getLong(ptr + index*getLongSize()); |
| 321 | } |
| 322 | /** |
| 323 | * Stores Java long[] array into memory. Memory location is treated as array |
| 324 | * of native <code>long</code>s |
| 325 | */ |
| 326 | static void put(long ptr, long[] arr) { |
| 327 | for (int i = 0; i < arr.length; i ++, ptr += getLongSize()) { |
| 328 | putLong(ptr, arr[i]); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * Stores Java Vector of Longs into memory. Memory location is treated as array |
| 334 | * of native <code>long</code>s |
| 335 | */ |
| 336 | static void putLong(long ptr, Vector arr) { |
| 337 | for (int i = 0; i < arr.size(); i ++, ptr += getLongSize()) { |
| 338 | putLong(ptr, ((Long)arr.elementAt(i)).longValue()); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Stores Java Vector of Longs into memory. Memory location is treated as array |
| 344 | * of native <code>long</code>s. Array is stored in reverse order |
| 345 | */ |
| 346 | static void putLongReverse(long ptr, Vector arr) { |
| 347 | for (int i = arr.size()-1; i >= 0; i--, ptr += getLongSize()) { |
| 348 | putLong(ptr, ((Long)arr.elementAt(i)).longValue()); |
| 349 | } |
| 350 | } |
| 351 | /** |
| 352 | * Converts length bytes of data pointed by <code>data</code> into byte array |
| 353 | * Returns null if data is zero |
| 354 | * @param data native pointer to native memory |
| 355 | * @param length size in longs(platform dependent) of native memory |
| 356 | */ |
| 357 | static long[] toLongs(long data, int length) { |
| 358 | if (data == 0) { |
| 359 | return null; |
| 360 | } |
| 361 | long[] res = new long[length]; |
| 362 | for (int i = 0; i < length; i++, data += getLongSize()) { |
| 363 | res[i] = getLong(data); |
| 364 | } |
| 365 | return res; |
| 366 | } |
| 367 | static long toData(long[] longs) { |
| 368 | if (longs == null) { |
| 369 | return 0; |
| 370 | } |
| 371 | long res = XlibWrapper.unsafe.allocateMemory(longs.length*getLongSize()); |
| 372 | for (int i = 0; i < longs.length; i++) { |
| 373 | putLong(res, i, longs[i]); |
| 374 | } |
| 375 | return res; |
| 376 | } |
| 377 | |
| 378 | |
| 379 | /** |
| 380 | * Access to C "unsigned long" date type, which is XID in X |
| 381 | */ |
| 382 | static long getULong(long ptr) { |
| 383 | if (XlibWrapper.dataModel == 32) { |
| 384 | // Compensate sign-expansion |
| 385 | return ((long)unsafe.getInt(ptr)) & 0xFFFFFFFFL; |
| 386 | } else { |
| 387 | // Can't do anything!!! |
| 388 | return unsafe.getLong(ptr); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | static void putULong(long ptr, long value) { |
| 393 | putLong(ptr, value); |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Allocates memory for array of native <code>long</code>s of the size <code>length</code> |
| 398 | */ |
| 399 | static long allocateLongArray(int length) { |
| 400 | return unsafe.allocateMemory(getLongSize() * length); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | static long getWindow(long ptr) { |
| 405 | return getLong(ptr); |
| 406 | } |
| 407 | static long getWindow(long ptr, int index) { |
| 408 | return getLong(ptr + getWindowSize()*index); |
| 409 | } |
| 410 | |
| 411 | static void putWindow(long ptr, long window) { |
| 412 | putLong(ptr, window); |
| 413 | } |
| 414 | |
| 415 | static void putWindow(long ptr, int index, long window) { |
| 416 | putLong(ptr, index, window); |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Set of function to return sizes of C data of the appropriate |
| 421 | * type. |
| 422 | */ |
| 423 | static int getWindowSize() { |
| 424 | return getLongSize(); |
| 425 | } |
| 426 | |
| 427 | |
| 428 | /** |
| 429 | * Set of function to access CARD32 type. All data which types are derived |
| 430 | * from CARD32 should be accessed using this accessors. |
| 431 | * These types are: XID(Window, Drawable, Font, Pixmap, Cursor, Colormap, GContext, KeySym), |
| 432 | * Atom, Mask, VisualID, Time |
| 433 | */ |
| 434 | static long getCard32(long ptr) { |
| 435 | return getLong(ptr); |
| 436 | } |
| 437 | static void putCard32(long ptr, long value) { |
| 438 | putLong(ptr, value); |
| 439 | } |
| 440 | static long getCard32(long ptr, int index) { |
| 441 | return getLong(ptr, index); |
| 442 | } |
| 443 | static void putCard32(long ptr, int index, long value) { |
| 444 | putLong(ptr, index, value); |
| 445 | } |
| 446 | static int getCard32Size() { |
| 447 | return getLongSize(); |
| 448 | } |
| 449 | static long[] card32ToArray(long ptr, int length) { |
| 450 | return toLongs(ptr, length); |
| 451 | } |
| 452 | static long card32ToData(long[] arr) { |
| 453 | return toData(arr); |
| 454 | } |
| 455 | } |