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      1 /*
      2  * Copyright (c) 1997, 2010, 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 #include "jni.h"
     27 #include "jni_util.h"
     28 #include "jvm.h"
     29 
     30 #include "io_util.h"
     31 #include "io_util_md.h"
     32 
     33 #include <fcntl.h>
     34 #include <nativehelper/JNIHelp.h>
     35 
     36 #define NATIVE_METHOD(className, functionName, signature) \
     37 { #functionName, signature, (void*)(className ## _ ## functionName) }
     38 
     39 /*******************************************************************/
     40 /*  BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/
     41 /*******************************************************************/
     42 
     43 jfieldID fos_fd; /* id for jobject 'fd' in java.io.FileOutputStream */
     44 
     45 /**************************************************************
     46  * Output stream
     47  */
     48 static void FileOutputStream_initIDs(JNIEnv *env) {
     49     jclass clazz = (*env)->FindClass(env, "java/io/FileOutputStream");
     50     fos_fd = (*env)->GetFieldID(env, clazz, "fd", "Ljava/io/FileDescriptor;");
     51 }
     52 
     53 
     54 JNIEXPORT void JNICALL
     55 FileOutputStream_open0(JNIEnv *env, jobject this,
     56                                    jstring path, jboolean append) {
     57     fileOpen(env, this, path, fos_fd,
     58              O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC));
     59 }
     60 
     61 static JNINativeMethod gMethods[] = {
     62   NATIVE_METHOD(FileOutputStream, open0, "(Ljava/lang/String;Z)V"),
     63 };
     64 
     65 void register_java_io_FileOutputStream(JNIEnv* env) {
     66     jniRegisterNativeMethods(env, "java/io/FileOutputStream", gMethods, NELEM(gMethods));
     67     FileOutputStream_initIDs(env);
     68 }
     69