Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102074 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 216 insertions, 0 deletions

diff --git a/libjava/classpath/native/jni/java-nio/java_nio_VMDirectByteBuffer.c b/libjava/classpath/native/jni/java-nio/java_nio_VMDirectByteBuffer.c
new file mode 100644
index 00000000000..3eb5677e646
--- /dev/null
+++ b/libjava/classpath/native/jni/java-nio/java_nio_VMDirectByteBuffer.c
@@ -0,0 +1,216 @@
+/* java_nio_VMDirectByteBuffer.c - Native methods for VMDirectByteBuffer
+   Copyright (C) 2004, 2005  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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 <config.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <jni.h>
+#include <jcl.h>
+
+#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)
+{
+#if SIZEOF_VOID_P == 4
+  return (void *) (*env)->GetIntField (env, rawdata, fieldNativePointer);
+#elif SIZEOF_VOID_P == 8
+  return (void *) (*env)->GetLongField (env, rawdata, fieldNativePointer);
+#else
+#error unsupported pointer size
+#endif
+}
+
+static jobject
+NIOGetRawData (JNIEnv * env, void *pointer)
+{
+#if SIZEOF_VOID_P == 4
+  return (*env)->NewObject (env, classRawData, methodRawDataInit,
+			    (jint) pointer);
+#elif SIZEOF_VOID_P == 8
+  return (*env)->NewObject (env, classRawData, methodRawDataInit,
+			    (jlong) pointer);
+#else
+#error unsupported pointer size
+#endif
+}
+
+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,
+					   "<init>", "(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;
+    }
+#elif SIZEOF_VOID_P == 8
+  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,
+					   "<init>", "(J)V");
+  if (methodRawDataInit == NULL)
+    {
+      JCL_ThrowException (env, "java/lang/InternalError",
+			  "unable to find internal constructor");
+      return;
+    }
+
+  fieldNativePointer = (*env)->GetFieldID (env, classRawData, "data", "J");
+  if (fieldNativePointer == NULL)
+    {
+      JCL_ThrowException (env, "java/lang/InternalError",
+			  "unable to find internal field");
+      return;
+    }
+#else
+#error unsupported pointer size
+#endif
+
+  /* We need to wrap the jclass in global reference to make it persistent */
+  if ((classRawData = (*env)->NewGlobalRef (env, classRawData)) == NULL)
+    {
+      JCL_ThrowException (env, "java/lang/InternalError",
+			  "failed to create global reference");
+      return;
+    }
+}
+
+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);
+}