1 /*
   2  * Copyright (c) 2003, 2011, 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 
  29 /*
  30  * Prototypes for functions in io_util_md.c called from io_util,





  31  * FileDescriptor.c, FileInputStream.c, FileOutputStream.c
  32  */
  33 WCHAR* pathToNTPath(JNIEnv *env, jstring path, jboolean throwFNFE);
  34 WCHAR* fileToNTPath(JNIEnv *env, jobject file, jfieldID id);
  35 WCHAR* getPrefixed(const WCHAR* path, int pathlen);
  36 WCHAR* currentDir(int di);
  37 int currentDirLength(const WCHAR* path, int pathlen);
  38 void fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags);
  39 int handleAvailable(jlong fd, jlong *pbytes);
  40 JNIEXPORT int handleSync(jlong fd);
  41 int handleSetLength(jlong fd, jlong length);
  42 JNIEXPORT jint handleRead(jlong fd, void *buf, jint len);
  43 JNIEXPORT jint handleWrite(jlong fd, const void *buf, jint len);
  44 JNIEXPORT jint handleAppend(jlong fd, const void *buf, jint len);
  45 jint handleClose(JNIEnv *env, jobject this, jfieldID fid);
  46 jlong handleLseek(jlong fd, jlong offset, jint whence);
  47 
  48 /*
  49  * Returns an opaque handle to file named by "path".  If an error occurs,
  50  * returns -1 and an exception is pending.
  51  */
  52 jlong winFileHandleOpen(JNIEnv *env, jstring path, int flags);
  53 
  54 /*
  55  * Macros to use the right data type for file descriptors
  56  */
  57 #define FD jlong
  58 
  59 /*
  60  * Macros to set/get fd from the java.io.FileDescriptor.
  61  * If GetObjectField returns null, SET_FD will stop and GET_FD
  62  * will simply return -1 to avoid crashing VM.
  63  */
  64 #define SET_FD(this, fd, fid) \
  65     if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
  66         (*env)->SetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID, (fd))
  67 
  68 #define GET_FD(this, fid) \
  69     ((*env)->GetObjectField(env, (this), (fid)) == NULL) ? \
  70       -1 : (*env)->GetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID)
  71 
  72 /*
  73  * Macros to set/get fd when inside java.io.FileDescriptor
  74  */
  75 #define THIS_FD(obj) (*env)->GetLongField(env, obj, IO_handle_fdID)
  76 
  77 /*

   1 /*
   2  * Copyright (c) 2003, 2013, 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 
  29 /*
  30  * Macros to use the right data type for file descriptors
  31  */
  32 #define FD jlong
  33 
  34 /*
  35  * Prototypes for functions in io_util_md.c called from io_util.c,
  36  * FileDescriptor.c, FileInputStream.c, FileOutputStream.c
  37  */
  38 WCHAR* pathToNTPath(JNIEnv *env, jstring path, jboolean throwFNFE);
  39 WCHAR* fileToNTPath(JNIEnv *env, jobject file, jfieldID id);
  40 WCHAR* getPrefixed(const WCHAR* path, int pathlen);
  41 WCHAR* currentDir(int di);
  42 int currentDirLength(const WCHAR* path, int pathlen);
  43 int handleAvailable(FD fd, jlong *pbytes);
  44 int handleSync(FD fd);
  45 int handleSetLength(FD fd, jlong length);
  46 JNIEXPORT jint handleRead(FD fd, void *buf, jint len);
  47 jint handleWrite(FD fd, const void *buf, jint len);
  48 jint handleAppend(FD fd, const void *buf, jint len);

  49 jint handleClose(JNIEnv *env, jobject this, jfieldID fid);
  50 jlong handleLseek(FD fd, jlong offset, jint whence);
  51 
  52 /*
  53  * Returns an opaque handle to file named by "path".  If an error occurs,
  54  * returns -1 and an exception is pending.
  55  */
  56 FD winFileHandleOpen(JNIEnv *env, jstring path, int flags);





  57 
  58 /*
  59  * Macros to set/get fd from the java.io.FileDescriptor.
  60  * If GetObjectField returns null, SET_FD will stop and GET_FD
  61  * will simply return -1 to avoid crashing VM.
  62  */
  63 #define SET_FD(this, fd, fid) \
  64     if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
  65         (*env)->SetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID, (fd))
  66 
  67 #define GET_FD(this, fid) \
  68     ((*env)->GetObjectField(env, (this), (fid)) == NULL) ? \
  69       -1 : (*env)->GetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID)
  70 
  71 /*
  72  * Macros to set/get fd when inside java.io.FileDescriptor
  73  */
  74 #define THIS_FD(obj) (*env)->GetLongField(env, obj, IO_handle_fdID)
  75 
  76 /*