/* java_nio_VMDirectByteBuffer.c - Native methods for VMDirectByteBuffer Copyright (C) 2004 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ #include #include #include #include #include #include #include "java_nio_VMDirectByteBuffer.h" static jclass classRawData; static jmethodID methodRawDataInit; static jfieldID fieldNativePointer; static void *NIOGetPointer (JNIEnv *, jobject); static jobject NIOGetRawData (JNIEnv *, void *pointer); static void * NIOGetPointer (JNIEnv *env, jobject rawdata) { return (void *) (*env)->GetIntField (env, rawdata, fieldNativePointer); } static jobject NIOGetRawData (JNIEnv *env, void *pointer) { return (*env)->NewObject (env, classRawData, methodRawDataInit, (jint) pointer); } JNIEXPORT void JNICALL Java_java_nio_VMDirectByteBuffer_init (JNIEnv *env, jclass clazz __attribute__ ((__unused__))) { #if SIZEOF_VOID_P == 4 classRawData = (*env)->FindClass (env, "gnu/classpath/RawData32"); if (classRawData == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal class"); return; } methodRawDataInit = (*env)->GetMethodID (env, classRawData, "", "(I)V"); if (methodRawDataInit == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal constructor"); return; } fieldNativePointer = (*env)->GetFieldID (env, classRawData, "data", "I"); if (fieldNativePointer == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal field"); return; } #else /* SIZEOF_VOID_P != 4 */ classRawData = (*env)->FindClass (env, "gnu/classpath/RawData64"); if (classRawData == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal class"); return; } methodRawDataInit = (*env)->GetMethodID (env, classRawData, "", "(L)V"); if (methodRawDataInit == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal constructor"); return; } fieldNativePointer = (*env)->GetFieldID (env, classRawData, "data", "L"); if (fieldNativePointer == NULL) { JCL_ThrowException(env, "java/lang/InternalError", "unable to find internal field"); return; } #endif /* SIZEOF_VOID_P != 4 */ } JNIEXPORT jobject JNICALL Java_java_nio_VMDirectByteBuffer_allocate (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jint capacity) { void *buffer; buffer = malloc (capacity); if (buffer == NULL) { JCL_ThrowException (env, "java/lang/OutOfMemoryError", "unable to allocate memory for direct byte buffer"); return 0; } return NIOGetRawData (env, buffer); } JNIEXPORT void JNICALL Java_java_nio_VMDirectByteBuffer_free (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address) { free (NIOGetPointer (env, address)); } JNIEXPORT jbyte JNICALL Java_java_nio_VMDirectByteBuffer_get__Lgnu_classpath_RawData_2I (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address, jint index) { return ((jbyte *) NIOGetPointer (env, address))[index]; } JNIEXPORT void JNICALL Java_java_nio_VMDirectByteBuffer_put (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address, jint index, jbyte value) { jbyte *pointer = (jbyte *) NIOGetPointer (env, address) + index; *pointer = value; } JNIEXPORT void JNICALL Java_java_nio_VMDirectByteBuffer_get__Lgnu_classpath_RawData_2I_3BII (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address, jint index, jbyteArray dst, jint dst_offset, jint dst_len) { jbyte *src = (jbyte *) NIOGetPointer (env, address) + index; memcpy ((*env)->GetByteArrayElements (env, dst, NULL) + dst_offset, src, dst_len); } JNIEXPORT void JNICALL Java_java_nio_VMDirectByteBuffer_shiftDown (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address, jint dst_offset, jint src_offset, jint count) { jbyte *dst = (jbyte *) NIOGetPointer (env, address) + dst_offset; jbyte *src = (jbyte *) NIOGetPointer (env, address) + src_offset; memmove (dst, src, count); } JNIEXPORT jobject JNICALL Java_java_nio_VMDirectByteBuffer_adjustAddress (JNIEnv *env, jclass clazz __attribute__ ((__unused__)), jobject address, jint offset) { return NIOGetRawData (env, (jbyte *) NIOGetPointer (env, address) + offset); }