| /* |
| * Copyright (c) 1996, 2000, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jvm.h" |
| #include "jni_util.h" |
| #include "jlong.h" |
| |
| #include "JNIHelp.h" |
| |
| #define NATIVE_METHOD(className, functionName, signature) \ |
| { #functionName, signature, (void*)(Java_java_io_ ## className ## _ ## functionName) } |
| |
| |
| |
| /* |
| * Class: java_io_ObjectInputStream |
| * Method: bytesToFloats |
| * Signature: ([BI[FII)V |
| * |
| * Reconstitutes nfloats float values from their byte representations. Byte |
| * values are read from array src starting at offset srcpos; the resulting |
| * float values are written to array dst starting at dstpos. |
| */ |
| JNIEXPORT void JNICALL |
| Java_java_io_ObjectInputStream_bytesToFloats(JNIEnv *env, |
| jclass this, |
| jbyteArray src, |
| jint srcpos, |
| jfloatArray dst, |
| jint dstpos, |
| jint nfloats) |
| { |
| union { |
| int i; |
| float f; |
| } u; |
| jfloat *floats; |
| jbyte *bytes; |
| jsize dstend; |
| jint ival; |
| |
| if (nfloats == 0) |
| return; |
| |
| /* fetch source array */ |
| if (src == NULL) { |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| bytes = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
| if (bytes == NULL) /* exception thrown */ |
| return; |
| |
| /* fetch dest array */ |
| if (dst == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| floats = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
| if (floats == NULL) { /* exception thrown */ |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| return; |
| } |
| |
| /* do conversion */ |
| dstend = dstpos + nfloats; |
| for ( ; dstpos < dstend; dstpos++) { |
| ival = ((bytes[srcpos + 0] & 0xFF) << 24) + |
| ((bytes[srcpos + 1] & 0xFF) << 16) + |
| ((bytes[srcpos + 2] & 0xFF) << 8) + |
| ((bytes[srcpos + 3] & 0xFF) << 0); |
| u.i = (long) ival; |
| floats[dstpos] = (jfloat) u.f; |
| srcpos += 4; |
| } |
| |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| (*env)->ReleasePrimitiveArrayCritical(env, dst, floats, 0); |
| } |
| |
| /* |
| * Class: java_io_ObjectInputStream |
| * Method: bytesToDoubles |
| * Signature: ([BI[DII)V |
| * |
| * Reconstitutes ndoubles double values from their byte representations. |
| * Byte values are read from array src starting at offset srcpos; the |
| * resulting double values are written to array dst starting at dstpos. |
| */ |
| JNIEXPORT void JNICALL |
| Java_java_io_ObjectInputStream_bytesToDoubles(JNIEnv *env, |
| jclass this, |
| jbyteArray src, |
| jint srcpos, |
| jdoubleArray dst, |
| jint dstpos, |
| jint ndoubles) |
| |
| { |
| union { |
| jlong l; |
| double d; |
| } u; |
| jdouble *doubles; |
| jbyte *bytes; |
| jsize dstend; |
| jlong lval; |
| |
| if (ndoubles == 0) |
| return; |
| |
| /* fetch source array */ |
| if (src == NULL) { |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| bytes = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
| if (bytes == NULL) /* exception thrown */ |
| return; |
| |
| /* fetch dest array */ |
| if (dst == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| doubles = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
| if (doubles == NULL) { /* exception thrown */ |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| return; |
| } |
| |
| /* do conversion */ |
| dstend = dstpos + ndoubles; |
| for ( ; dstpos < dstend; dstpos++) { |
| lval = (((jlong) bytes[srcpos + 0] & 0xFF) << 56) + |
| (((jlong) bytes[srcpos + 1] & 0xFF) << 48) + |
| (((jlong) bytes[srcpos + 2] & 0xFF) << 40) + |
| (((jlong) bytes[srcpos + 3] & 0xFF) << 32) + |
| (((jlong) bytes[srcpos + 4] & 0xFF) << 24) + |
| (((jlong) bytes[srcpos + 5] & 0xFF) << 16) + |
| (((jlong) bytes[srcpos + 6] & 0xFF) << 8) + |
| (((jlong) bytes[srcpos + 7] & 0xFF) << 0); |
| jlong_to_jdouble_bits(&lval); |
| u.l = lval; |
| doubles[dstpos] = (jdouble) u.d; |
| srcpos += 8; |
| } |
| |
| (*env)->ReleasePrimitiveArrayCritical(env, src, bytes, JNI_ABORT); |
| (*env)->ReleasePrimitiveArrayCritical(env, dst, doubles, 0); |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| NATIVE_METHOD(ObjectInputStream, bytesToFloats, "([BI[FII)V"), |
| NATIVE_METHOD(ObjectInputStream, bytesToDoubles, "([BI[DII)V"), |
| }; |
| |
| void register_java_io_ObjectInputStream(JNIEnv* env) { |
| jniRegisterNativeMethods(env, "java/io/ObjectInputStream", gMethods, NELEM(gMethods)); |
| } |