J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2003 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 | /* |
| 27 | */ |
| 28 | |
| 29 | #include "jni.h" |
| 30 | #include "jni_util.h" |
| 31 | #include "jlong.h" |
| 32 | #include <string.h> |
| 33 | |
| 34 | /* |
| 35 | * WARNING: |
| 36 | * |
| 37 | * Do not replace instances of: |
| 38 | * |
| 39 | * if (length > MBYTE) |
| 40 | * size = MBYTE; |
| 41 | * else |
| 42 | * size = length; |
| 43 | * |
| 44 | * with |
| 45 | * |
| 46 | * size = (length > MBYTE ? MBYTE : length); |
| 47 | * |
| 48 | * This expression causes a c compiler assertion failure when compiling on |
| 49 | * 32-bit sparc. |
| 50 | */ |
| 51 | |
| 52 | #define MBYTE 1048576 |
| 53 | |
| 54 | #define GETCRITICAL(bytes, env, obj) { \ |
| 55 | bytes = (*env)->GetPrimitiveArrayCritical(env, obj, NULL); \ |
| 56 | if (bytes == NULL) \ |
| 57 | JNU_ThrowInternalError(env, "Unable to get array"); \ |
| 58 | } |
| 59 | |
| 60 | #define RELEASECRITICAL(bytes, env, obj, mode) { \ |
| 61 | (*env)->ReleasePrimitiveArrayCritical(env, obj, bytes, mode); \ |
| 62 | } |
| 63 | |
| 64 | #define SWAPSHORT(x) ((jshort)(((x) << 8) | (((x) >> 8) & 0xff))) |
| 65 | #define SWAPINT(x) ((jint)((SWAPSHORT((jshort)(x)) << 16) | \ |
| 66 | (SWAPSHORT((jshort)((x) >> 16)) & 0xffff))) |
| 67 | #define SWAPLONG(x) ((jlong)(((jlong)SWAPINT((jint)(x)) << 32) | \ |
| 68 | ((jlong)SWAPINT((jint)((x) >> 32)) & 0xffffffff))) |
| 69 | |
| 70 | JNIEXPORT void JNICALL |
| 71 | Java_java_nio_Bits_copyFromByteArray(JNIEnv *env, jobject this, jobject src, |
| 72 | jlong srcPos, jlong dstAddr, jlong length) |
| 73 | { |
| 74 | jbyte *bytes; |
| 75 | size_t size; |
| 76 | |
| 77 | while (length > 0) { |
| 78 | size = (length > MBYTE ? MBYTE : length); |
| 79 | |
| 80 | GETCRITICAL(bytes, env, src); |
| 81 | memcpy((void *)dstAddr, bytes + srcPos, size); |
| 82 | RELEASECRITICAL(bytes, env, src, JNI_ABORT); |
| 83 | |
| 84 | length -= size; |
| 85 | dstAddr += size; |
| 86 | srcPos += size; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | JNIEXPORT void JNICALL |
| 91 | Java_java_nio_Bits_copyToByteArray(JNIEnv *env, jobject this, jlong srcAddr, |
| 92 | jobject dst, jlong dstPos, jlong length) |
| 93 | { |
| 94 | jbyte *bytes; |
| 95 | size_t size; |
| 96 | |
| 97 | while (length > 0) { |
| 98 | size = (length > MBYTE ? MBYTE : length); |
| 99 | |
| 100 | GETCRITICAL(bytes, env, dst); |
| 101 | memcpy(bytes + dstPos, (void *)srcAddr, size); |
| 102 | RELEASECRITICAL(bytes, env, dst, 0); |
| 103 | |
| 104 | length -= size; |
| 105 | srcAddr += size; |
| 106 | dstPos += size; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | JNIEXPORT void JNICALL |
| 111 | Java_java_nio_Bits_copyFromShortArray(JNIEnv *env, jobject this, jobject src, |
| 112 | jlong srcPos, jlong dstAddr, jlong length) |
| 113 | { |
| 114 | jbyte *bytes; |
| 115 | size_t i, size; |
| 116 | jshort *srcShort, *dstShort, *endShort; |
| 117 | jshort tmpShort; |
| 118 | |
| 119 | dstShort = (jshort *)dstAddr; |
| 120 | |
| 121 | while (length > 0) { |
| 122 | /* do not change this if-else statement, see WARNING above */ |
| 123 | if (length > MBYTE) |
| 124 | size = MBYTE; |
| 125 | else |
| 126 | size = length; |
| 127 | |
| 128 | GETCRITICAL(bytes, env, src); |
| 129 | |
| 130 | srcShort = (jshort *)(bytes + srcPos); |
| 131 | endShort = srcShort + (size / sizeof(jshort)); |
| 132 | while (srcShort < endShort) { |
| 133 | tmpShort = *srcShort++; |
| 134 | *dstShort++ = SWAPSHORT(tmpShort); |
| 135 | } |
| 136 | |
| 137 | RELEASECRITICAL(bytes, env, src, JNI_ABORT); |
| 138 | |
| 139 | length -= size; |
| 140 | dstAddr += size; |
| 141 | srcPos += size; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | JNIEXPORT void JNICALL |
| 146 | Java_java_nio_Bits_copyToShortArray(JNIEnv *env, jobject this, jlong srcAddr, |
| 147 | jobject dst, jlong dstPos, jlong length) |
| 148 | { |
| 149 | jbyte *bytes; |
| 150 | size_t i, size; |
| 151 | jshort *srcShort, *dstShort, *endShort; |
| 152 | jshort tmpShort; |
| 153 | |
| 154 | srcShort = (jshort *)srcAddr; |
| 155 | |
| 156 | while (length > 0) { |
| 157 | /* do not change this if-else statement, see WARNING above */ |
| 158 | if (length > MBYTE) |
| 159 | size = MBYTE; |
| 160 | else |
| 161 | size = length; |
| 162 | |
| 163 | GETCRITICAL(bytes, env, dst); |
| 164 | |
| 165 | dstShort = (jshort *)(bytes + dstPos); |
| 166 | endShort = srcShort + (size / sizeof(jshort)); |
| 167 | while (srcShort < endShort) { |
| 168 | tmpShort = *srcShort++; |
| 169 | *dstShort++ = SWAPSHORT(tmpShort); |
| 170 | } |
| 171 | |
| 172 | RELEASECRITICAL(bytes, env, dst, 0); |
| 173 | |
| 174 | length -= size; |
| 175 | srcAddr += size; |
| 176 | dstPos += size; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | JNIEXPORT void JNICALL |
| 181 | Java_java_nio_Bits_copyFromIntArray(JNIEnv *env, jobject this, jobject src, |
| 182 | jlong srcPos, jlong dstAddr, jlong length) |
| 183 | { |
| 184 | jbyte *bytes; |
| 185 | size_t i, size; |
| 186 | jint *srcInt, *dstInt, *endInt; |
| 187 | jint tmpInt; |
| 188 | |
| 189 | dstInt = (jint *)dstAddr; |
| 190 | |
| 191 | while (length > 0) { |
| 192 | /* do not change this code, see WARNING above */ |
| 193 | if (length > MBYTE) |
| 194 | size = MBYTE; |
| 195 | else |
| 196 | size = length; |
| 197 | |
| 198 | GETCRITICAL(bytes, env, src); |
| 199 | |
| 200 | srcInt = (jint *)(bytes + srcPos); |
| 201 | endInt = srcInt + (size / sizeof(jint)); |
| 202 | while (srcInt < endInt) { |
| 203 | tmpInt = *srcInt++; |
| 204 | *dstInt++ = SWAPINT(tmpInt); |
| 205 | } |
| 206 | |
| 207 | RELEASECRITICAL(bytes, env, src, JNI_ABORT); |
| 208 | |
| 209 | length -= size; |
| 210 | dstAddr += size; |
| 211 | srcPos += size; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | JNIEXPORT void JNICALL |
| 216 | Java_java_nio_Bits_copyToIntArray(JNIEnv *env, jobject this, jlong srcAddr, |
| 217 | jobject dst, jlong dstPos, jlong length) |
| 218 | { |
| 219 | jbyte *bytes; |
| 220 | size_t i, size; |
| 221 | jint *srcInt, *dstInt, *endInt; |
| 222 | jint tmpInt; |
| 223 | |
| 224 | srcInt = (jint *)srcAddr; |
| 225 | |
| 226 | while (length > 0) { |
| 227 | /* do not change this code, see WARNING above */ |
| 228 | if (length > MBYTE) |
| 229 | size = MBYTE; |
| 230 | else |
| 231 | size = length; |
| 232 | |
| 233 | GETCRITICAL(bytes, env, dst); |
| 234 | |
| 235 | dstInt = (jint *)(bytes + dstPos); |
| 236 | endInt = srcInt + (size / sizeof(jint)); |
| 237 | while (srcInt < endInt) { |
| 238 | tmpInt = *srcInt++; |
| 239 | *dstInt++ = SWAPINT(tmpInt); |
| 240 | } |
| 241 | |
| 242 | RELEASECRITICAL(bytes, env, dst, 0); |
| 243 | |
| 244 | length -= size; |
| 245 | srcAddr += size; |
| 246 | dstPos += size; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | JNIEXPORT void JNICALL |
| 251 | Java_java_nio_Bits_copyFromLongArray(JNIEnv *env, jobject this, jobject src, |
| 252 | jlong srcPos, jlong dstAddr, jlong length) |
| 253 | { |
| 254 | jbyte *bytes; |
| 255 | size_t i, size; |
| 256 | jlong *srcLong, *dstLong, *endLong; |
| 257 | jlong tmpLong; |
| 258 | |
| 259 | dstLong = (jlong *)dstAddr; |
| 260 | |
| 261 | while (length > 0) { |
| 262 | /* do not change this code, see WARNING above */ |
| 263 | if (length > MBYTE) |
| 264 | size = MBYTE; |
| 265 | else |
| 266 | size = length; |
| 267 | |
| 268 | GETCRITICAL(bytes, env, src); |
| 269 | |
| 270 | srcLong = (jlong *)(bytes + srcPos); |
| 271 | endLong = srcLong + (size / sizeof(jlong)); |
| 272 | while (srcLong < endLong) { |
| 273 | tmpLong = *srcLong++; |
| 274 | *dstLong++ = SWAPLONG(tmpLong); |
| 275 | } |
| 276 | |
| 277 | RELEASECRITICAL(bytes, env, src, JNI_ABORT); |
| 278 | |
| 279 | length -= size; |
| 280 | dstAddr += size; |
| 281 | srcPos += size; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | JNIEXPORT void JNICALL |
| 286 | Java_java_nio_Bits_copyToLongArray(JNIEnv *env, jobject this, jlong srcAddr, |
| 287 | jobject dst, jlong dstPos, jlong length) |
| 288 | { |
| 289 | jbyte *bytes; |
| 290 | size_t i, size; |
| 291 | jlong *srcLong, *dstLong, *endLong; |
| 292 | jlong tmpLong; |
| 293 | |
| 294 | srcLong = (jlong *)srcAddr; |
| 295 | |
| 296 | while (length > 0) { |
| 297 | /* do not change this code, see WARNING above */ |
| 298 | if (length > MBYTE) |
| 299 | size = MBYTE; |
| 300 | else |
| 301 | size = length; |
| 302 | |
| 303 | GETCRITICAL(bytes, env, dst); |
| 304 | |
| 305 | dstLong = (jlong *)(bytes + dstPos); |
| 306 | endLong = srcLong + (size / sizeof(jlong)); |
| 307 | while (srcLong < endLong) { |
| 308 | tmpLong = *srcLong++; |
| 309 | *dstLong++ = SWAPLONG(tmpLong); |
| 310 | } |
| 311 | |
| 312 | RELEASECRITICAL(bytes, env, dst, 0); |
| 313 | |
| 314 | length -= size; |
| 315 | srcAddr += size; |
| 316 | dstPos += size; |
| 317 | } |
| 318 | } |