/*

 * 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.h"

#include "jni_util.h"

/*

 * Macros to use the right data type for file descriptors

 */

#define FD jlong

/*

 * Prototypes for functions in io_util_md.c called from io_util.c,

 * FileDescriptor.c, FileInputStream.c, FileOutputStream.c,

 * ProcessImpl_md.c

 */

WCHAR* pathToNTPath(JNIEnv *env, jstring path, jboolean throwFNFE);

WCHAR* fileToNTPath(JNIEnv *env, jobject file, jfieldID id);

WCHAR* getPrefixed(const WCHAR* path, int pathlen);

WCHAR* currentDir(int di);

int currentDirLength(const WCHAR* path, int pathlen);

int handleAvailable(FD fd, jlong *pbytes);

int handleSync(FD fd);

int handleSetLength(FD fd, jlong length);

jlong handleGetLength(FD fd);

JNIEXPORT jint handleRead(FD fd, void *buf, jint len);

jint handleWrite(FD fd, const void *buf, jint len);

jint handleAppend(FD fd, const void *buf, jint len);

void handleClose(JNIEnv *env, jobject this, jfieldID fid);

void fileDescriptorClose(JNIEnv *env, jobject this);

/*

 * Returns an opaque handle to file named by "path".  If an error occurs,

 * returns -1 and an exception is pending.

 */

/*

 * Macros to set/get fd from the java.io.FileDescriptor.

 * 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)->SetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID, (fd))

#define GET_FD(this, fid) \

    ((*env)->GetObjectField(env, (this), (fid)) == NULL) ? \

      -1 : (*env)->GetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID)

/*

 * Macros to set/get fd when inside java.io.FileDescriptor

 */

#define THIS_FD(obj) (*env)->GetLongField(env, obj, IO_handle_fdID)

/*

 * Route the routines away from VM

 */

#define IO_Append handleAppend

#define IO_Write handleWrite

#define IO_Sync handleSync

#define IO_Read handleRead

#define IO_Lseek handleLseek

#define IO_Available handleAvailable

#define IO_SetLength handleSetLength

#define IO_GetLength handleGetLength

/*

 * Setting the handle field in Java_java_io_FileDescriptor_set for

 * standard handles stdIn, stdOut, stdErr

 */

#define SET_HANDLE(fd) \

if (fd == 0) { \

    return (jlong)GetStdHandle(STD_INPUT_HANDLE); \

} else if (fd == 1) { \

    return (jlong)GetStdHandle(STD_OUTPUT_HANDLE); \

} else if (fd == 2) { \

    return (jlong)GetStdHandle(STD_ERROR_HANDLE); \

} else { \

    return (jlong)-1; \

} \

/* INVALID_FILE_ATTRIBUTES is not defined in VC++6.0's header files but

 * in later release. Keep here just in case someone is still using VC++6.0

 */

#ifndef INVALID_FILE_ATTRIBUTES

#define INVALID_FILE_ATTRIBUTES ((DWORD)-1)

#endif