1 /* 2 * Copyright (c) 2000, 2019, 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 // -- This file was mechanically generated: Do not edit! -- // 27 // Android-note: This file is generated by ojluni/src/tools/gensrc_android.sh. 28 29 package java.nio; 30 31 import java.util.Objects; 32 33 import libcore.io.Memory; 34 35 class ByteBufferAsIntBuffer // package-private 36 extends IntBuffer 37 { 38 39 40 41 protected final ByteBuffer bb; 42 43 44 // Android-added: Added offset as address can be zero on Android. 45 /** 46 * The offset from the Bytebuffer at the position 0 (in addition to bb.offset) in the 47 * number of bytes. 48 */ 49 protected final int byteOffset; 50 // Android-added: Merge with little- and big-endian classes. 51 private final ByteOrder order; 52 53 // Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet. ByteBufferAsIntBuffer(ByteBuffer bb, int mark, int pos, int lim, int cap, int off, ByteOrder order)54 ByteBufferAsIntBuffer(ByteBuffer bb, 55 int mark, int pos, int lim, int cap, 56 int off, ByteOrder order) 57 { 58 59 // Android-removed: Android duplicates the buffer, and merges with the read-only buffer. 60 // super(mark, pos, lim, cap, segment); 61 // this.bb = bb; 62 // address = addr; 63 // assert address >= bb.address; 64 super(mark, pos, lim, cap); 65 this.bb = bb.duplicate(); 66 this.isReadOnly = bb.isReadOnly; 67 // There are only two possibilities for the type of ByteBuffer "bb", viz, DirectByteBuffer and 68 // HeapByteBuffer. We only have to initialize the field when bb is an instance of 69 // DirectByteBuffer. 70 // The address field is used by NIOAccess#getBasePointer and GetDirectBufferAddress method 71 // in art which return the address of the first usable byte of the underlying memory, i.e, 72 // the position of parent buffer. Therefore, value of "off" will be equal to parent buffer's 73 // position when the method is called from either HeapByteBuffer or DirectByteBuffer. 74 if (bb instanceof DirectByteBuffer) { 75 this.address = bb.address + off; 76 } 77 this.bb.order(order); 78 this.order = order; 79 byteOffset = off; 80 81 82 83 } 84 85 @Override base()86 Object base() { 87 // Android-changed: DirectByteBuffer allocated directly assigns both hb and address field. 88 // return bb.hb; 89 return bb.base(); 90 } 91 92 @Override slice()93 public IntBuffer slice() { 94 int pos = this.position(); 95 int lim = this.limit(); 96 int rem = (pos <= lim ? lim - pos : 0); 97 // Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet. 98 // long addr = byteOffset(pos); 99 // return new ByteBufferAsIntBuffer(bb, -1, 0, rem, rem, addr, order); 100 return new ByteBufferAsIntBuffer(bb, -1, 0, rem, rem, ix(pos), order); 101 } 102 103 @Override slice(int index, int length)104 public IntBuffer slice(int index, int length) { 105 Objects.checkFromIndexSize(index, length, limit()); 106 return new ByteBufferAsIntBuffer(bb, 107 -1, 108 0, 109 length, 110 length, 111 // Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet. 112 ix(index), order); 113 } 114 115 @Override duplicate()116 public IntBuffer duplicate() { 117 return new ByteBufferAsIntBuffer(bb, 118 this.markValue(), 119 this.position(), 120 this.limit(), 121 this.capacity(), 122 // Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet. 123 byteOffset, order); 124 } 125 126 @Override asReadOnlyBuffer()127 public IntBuffer asReadOnlyBuffer() { 128 129 return new ByteBufferAsIntBuffer(bb.asReadOnlyBuffer(), 130 this.markValue(), 131 this.position(), 132 this.limit(), 133 this.capacity(), 134 // Android-changed: Added ByteOrder and removed MemorySegmentProxy to be supported yet. 135 byteOffset, order); 136 137 138 139 } 140 141 142 ix(int i)143 private int ix(int i) { 144 // Android-changed: address can be zero on Android. 145 // int off = (int) (address - bb.address); 146 // return (i << 2) + off; 147 return (i << 2) + byteOffset; 148 } 149 150 // Android-removed: Removed unused byteOffset(long). 151 /* 152 protected long byteOffset(long i) { 153 return (i << 2) + address; 154 } 155 */ 156 157 @Override get()158 public int get() { 159 // Android-changed: Removed MemorySegmentProxy to be supported yet. 160 // int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), bb.hb, byteOffset(nextGetIndex()), 161 // false); 162 // return (x); 163 return get(nextGetIndex()); 164 } 165 166 @Override get(int i)167 public int get(int i) { 168 // Android-changed: Removed MemorySegmentProxy to be supported yet. 169 // int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), bb.hb, byteOffset(checkIndex(i)), 170 // false); 171 // return (x); 172 return bb.getIntUnchecked(ix(checkIndex(i))); 173 } 174 175 // BEGIN Android-added: Improve the efficiency of get(). 176 @Override get(int[] dst, int off, int length)177 public IntBuffer get(int[] dst, int off, int length) { 178 Objects.checkFromIndexSize(off, length, dst.length); 179 if (length > remaining()) 180 throw new BufferUnderflowException(); 181 bb.getUnchecked(ix(position), dst, off, length); 182 position += length; 183 return this; 184 } 185 186 @Override get(int index, int[] dst, int off, int length)187 public IntBuffer get(int index, int[] dst, int off, int length) { 188 Objects.checkFromIndexSize(index, length, limit()); 189 Objects.checkFromIndexSize(off, length, dst.length); 190 bb.getUnchecked(ix(index), dst, off, length); 191 return this; 192 } 193 // END Android-added: Improve the efficiency of get(). 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 @Override put(int x)209 public IntBuffer put(int x) { 210 211 // Android-added: Merge the Read-only buffer class with this Read-Write buffer class. 212 throwIfReadOnly(); 213 // Android-changed: Removed MemorySegmentProxy to be supported yet. 214 // int y = (x); 215 // SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), bb.hb, byteOffset(nextPutIndex()), y, 216 // false); 217 put(nextPutIndex(), x); 218 return this; 219 220 221 222 } 223 224 @Override put(int i, int x)225 public IntBuffer put(int i, int x) { 226 227 // Android-added: Merge the Read-only buffer class with this Read-Write buffer class. 228 throwIfReadOnly(); 229 // Android-changed: Removed MemorySegmentProxy to be supported yet. 230 // int y = (x); 231 // SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), bb.hb, byteOffset(checkIndex(i)), y, 232 // false); 233 bb.putIntUnchecked(ix(checkIndex(i)), x); 234 return this; 235 236 237 238 } 239 240 // BEGIN Android-added: Improve the efficiency of put(type$[]). 241 @Override put(int[] src, int off, int length)242 public IntBuffer put(int[] src, int off, int length) { 243 throwIfReadOnly(); 244 Objects.checkFromIndexSize(off, length, src.length); 245 if (length > remaining()) 246 throw new BufferOverflowException(); 247 bb.putUnchecked(ix(position), src, off, length); 248 position += length; 249 return this; 250 } 251 252 @Override put(int index, int[] src, int off, int length)253 public IntBuffer put(int index, int[] src, int off, int length) { 254 throwIfReadOnly(); 255 Objects.checkFromIndexSize(index, length, limit()); 256 Objects.checkFromIndexSize(off, length, src.length); 257 putUnchecked(index, src, off, length); 258 return this; 259 } 260 putUnchecked(int index, int[] src, int off, int length)261 private void putUnchecked(int index, int[] src, int off, int length) { 262 bb.putUnchecked(ix(index), src, off, length); 263 } 264 265 @Override putBuffer(int pos, IntBuffer src, int srcPos, int n)266 void putBuffer(int pos, IntBuffer src, int srcPos, int n) { 267 if (src.hb != null) { 268 // this and src don't share the same backed char[]. 269 putUnchecked(pos, src.hb, srcPos + src.offset, n); 270 return; 271 } 272 if (order() == src.order() && 273 src instanceof ByteBufferAsIntBuffer asSrc) { // always true if src.hb == null 274 this.bb.putBuffer(ix(pos), asSrc.bb, asSrc.ix(srcPos), n << 2); 275 return; 276 } 277 278 // Fallback to the slow path until memmove with bswap is implemented 279 super.putBuffer(pos, src, srcPos, n); 280 } 281 // END Android-added: Improve the efficiency of put(type$[]). 282 283 @Override compact()284 public IntBuffer compact() { 285 286 // Android-added: Merge the Read-only buffer class with this Read-Write buffer class. 287 throwIfReadOnly(); 288 int pos = position(); 289 int lim = limit(); 290 int rem = (pos <= lim ? lim - pos : 0); 291 // Android-changed: Improve the efficiency. 292 /* 293 ByteBuffer db = bb.duplicate(); 294 db.limit(ix(lim)); 295 db.position(ix(0)); 296 ByteBuffer sb = db.slice(); 297 sb.position(pos << 2); 298 sb.compact(); 299 */ 300 if (!(bb instanceof DirectByteBuffer)) { 301 System.arraycopy(bb.array(), ix(pos), bb.array(), ix(0), rem << 2); 302 } else { 303 // Use pos << 2 instead of ix(pos) to avoid double counting of the offset 304 // because this.address == bb.address + offset; 305 Memory.memmove(this, 0, this, pos << 2, rem << 2); 306 } 307 position(rem); 308 limit(capacity()); 309 discardMark(); 310 return this; 311 312 313 314 } 315 316 @Override isDirect()317 public boolean isDirect() { 318 return bb.isDirect(); 319 } 320 321 @Override isReadOnly()322 public boolean isReadOnly() { 323 return isReadOnly; 324 } 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 @Override order()369 public ByteOrder order() { 370 return order; 371 } 372 373 374 375 376 377 378 379 380 // Android-added: Merge the Read-only buffer class with this Read-Write buffer class. throwIfReadOnly()381 private void throwIfReadOnly() { 382 if (isReadOnly) { 383 throw new ReadOnlyBufferException(); 384 } 385 } 386 } 387