/*
* Copyright (c) 1997, 2010, 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.h"
#include "jni_util.h"
extern jfieldID IO_fd_fdID;
extern jfieldID IO_handle_fdID;
#ifdef _ALLBSD_SOURCE
#include <fcntl.h>
#ifndef O_SYNC
#define O_SYNC O_FSYNC
#endif
#ifndef O_DSYNC
#define O_DSYNC O_FSYNC
#endif
#elif !defined(O_DSYNC) || !defined(O_SYNC)
#define O_SYNC (0x0800)
#define O_DSYNC (0x2000)
#endif
/*
* IO helper functions
*/
jint readSingle(JNIEnv *env, jobject this, jfieldID fid);
jint readBytes(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
jint len, jfieldID fid);
void writeSingle(JNIEnv *env, jobject this, jint byte, jboolean append, jfieldID fid);
void writeBytes(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
jint len, jboolean append, jfieldID fid);
void fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags);
void throwFileNotFoundException(JNIEnv *env, jstring path);
/*
* Macros for managing platform strings. The typical usage pattern is:
*
* WITH_PLATFORM_STRING(env, string, var) {
* doSomethingWith(var);
* } END_PLATFORM_STRING(env, var);
*
* where env is the prevailing JNIEnv,
* string is a JNI reference to a java.lang.String object, and
* var is the char * variable that will point to the string,
* after being converted into the platform encoding.
*
* The related macro WITH_FIELD_PLATFORM_STRING first extracts the string from
* a given field of a given object:
*
* WITH_FIELD_PLATFORM_STRING(env, object, id, var) {
* doSomethingWith(var);
* } END_PLATFORM_STRING(env, var);
*
* where env is the prevailing JNIEnv,
* object is a jobject,
* id is the field ID of the String field to be extracted, and
* var is the char * variable that will point to the string.
*
* Uses of these macros may be nested as long as each WITH_.._STRING macro
* declares a unique variable.
*/
#define WITH_PLATFORM_STRING(env, strexp, var) \
if (1) { \
const char *var; \
jstring _##var##str = (strexp); \
if (_##var##str == NULL) { \
JNU_ThrowNullPointerException((env), NULL); \
goto _##var##end; \
} \
var = JNU_GetStringPlatformChars((env), _##var##str, NULL); \
if (var == NULL) goto _##var##end;
#define WITH_FIELD_PLATFORM_STRING(env, object, id, var) \
WITH_PLATFORM_STRING(env, \
((object == NULL) \
? NULL \
: (*(env))->GetObjectField((env), (object), (id))), \
var)
#define END_PLATFORM_STRING(env, var) \
JNU_ReleaseStringPlatformChars(env, _##var##str, var); \
_##var##end: ; \
} else ((void)NULL)
/* Macros for transforming Java Strings into native Unicode strings.
* Works analogously to WITH_PLATFORM_STRING.
*/
#define WITH_UNICODE_STRING(env, strexp, var) \
if (1) { \
const jchar *var; \
jstring _##var##str = (strexp); \
if (_##var##str == NULL) { \
JNU_ThrowNullPointerException((env), NULL); \
goto _##var##end; \
} \
var = (*(env))->GetStringChars((env), _##var##str, NULL); \
if (var == NULL) goto _##var##end;
#define END_UNICODE_STRING(env, var) \
(*(env))->ReleaseStringChars(env, _##var##str, var); \
_##var##end: ; \
} else ((void)NULL)