| /* |
| * 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) |