text: /*
   * Copyright (c) 2003, 2013, 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_util.h"
  
  /*
   * Macros to use the right data type for file descriptors
   */
  #define FD jint
  
  /*
   * Prototypes for functions in io_util_md.c called from io_util.c,
   * FileDescriptor.c, FileInputStream.c, FileOutputStream.c,
   * UnixFileSystem_md.c
   */
  ssize_t handleWrite(FD fd, const void *buf, jint len);
  ssize_t handleRead(FD fd, void *buf, jint len);
  jint handleAvailable(FD fd, jlong *pbytes);
  jint handleSetLength(FD fd, jlong length);
  
  FD handleOpen(const char *path, int oflag, int mode);
  
  /*
   * Macros to set/get fd from the java.io.FileDescriptor.  These
   * macros rely on having an appropriately defined 'this' object
   * within the scope in which they're used.
   * If GetObjectField returns null, SET_FD will stop and GET_FD
   * will simply return -1 to avoid crashing VM.
   */
  
  #define SET_FD(this, fd, fid) \
      if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
          (*env)->SetIntField(env, (*env)->GetObjectField(env, (this), (fid)),IO_fd_fdID, (fd))
  
  #define GET_FD(this, fid) \
      (*env)->GetObjectField(env, (this), (fid)) == NULL ? \
          -1 : (*env)->GetIntField(env, (*env)->GetObjectField(env, (this), (fid)), IO_fd_fdID)
  
  /*
   * Macros to set/get fd when inside java.io.FileDescriptor
   */
  #define THIS_FD(obj) (*env)->GetIntField(env, obj, IO_fd_fdID)
  
  /*
   * Route the routines
   */
  #define IO_Sync fsync
  #define IO_Read handleRead
  #define IO_Write handleWrite
  #define IO_Append handleWrite
  #define IO_Available handleAvailable
  #define IO_SetLength handleSetLength
  
  #ifdef _ALLBSD_SOURCE
  #define open64 open
  #define fstat64 fstat
  #define stat64 stat
  #define lseek64 lseek
  #define ftruncate64 ftruncate
  #define IO_Lseek lseek
  #else
  #define IO_Lseek lseek64
  #endif
  
  /*
   * On Solaris, the handle field is unused
   */
  #define SET_HANDLE(fd) return (jlong)-1
  
  /*
   * Retry the operation if it is interrupted
   */
  #define RESTARTABLE(_cmd, _result) do { \
      do { \
          _result = _cmd; \
      } while((_result == -1) && (errno == EINTR)); \
  } while(0)
  
  /*
   * IO helper function(s)
   */
  void fileClose(JNIEnv *env, jobject this, jfieldID fid);
  
  #ifdef MACOSX
  jstring newStringPlatform(JNIEnv *env, const char* str);
  #endif
  