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111 lines
3.9 KiB
C
111 lines
3.9 KiB
C
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "jni.h"
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#include "jni_util.h"
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/*
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* Macros to use the right data type for file descriptors
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*/
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#define FD jlong
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/*
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* Prototypes for functions in io_util_md.c called from io_util.c,
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* FileDescriptor.c, FileInputStream.c, FileOutputStream.c,
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* ProcessImpl_md.c
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*/
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WCHAR* pathToNTPath(JNIEnv *env, jstring path, jboolean throwFNFE);
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WCHAR* fileToNTPath(JNIEnv *env, jobject file, jfieldID id);
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__declspec(dllexport) WCHAR* getPrefixed(const WCHAR* path, int pathlen);
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WCHAR* currentDir(int di);
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int currentDirLength(const WCHAR* path, int pathlen);
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int handleAvailable(FD fd, jlong *pbytes);
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int handleSync(FD fd);
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jint handleSetLength(FD fd, jlong length);
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jlong handleGetLength(FD fd);
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JNIEXPORT jint handleRead(FD fd, void *buf, jint len);
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jint handleWrite(FD fd, const void *buf, jint len);
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jint handleAppend(FD fd, const void *buf, jint len);
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void fileDescriptorClose(JNIEnv *env, jobject this);
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JNIEXPORT jlong JNICALL
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handleLseek(FD fd, jlong offset, jint whence);
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/*
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* Returns an opaque handle to file named by "path". If an error occurs,
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* returns -1 and an exception is pending.
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*/
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FD winFileHandleOpen(JNIEnv *env, jstring path, int flags);
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/*
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* Macros to set/get fd from the java.io.FileDescriptor.
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* If GetObjectField returns null, SET_FD will stop and GET_FD
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* will simply return -1 to avoid crashing VM.
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*/
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#define SET_FD(this, fd, fid) \
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if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
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(*env)->SetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID, (fd))
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#define GET_FD(this, fid) \
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((*env)->GetObjectField(env, (this), (fid)) == NULL) ? \
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-1 : (*env)->GetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID)
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/*
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* Macros to set/get fd when inside java.io.FileDescriptor
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*/
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#define THIS_FD(obj) (*env)->GetLongField(env, obj, IO_handle_fdID)
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/*
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* Route the routines away from VM
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*/
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#define IO_Append handleAppend
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#define IO_Write handleWrite
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#define IO_Sync handleSync
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#define IO_Read handleRead
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#define IO_Lseek handleLseek
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#define IO_Available handleAvailable
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#define IO_SetLength handleSetLength
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#define IO_GetLength handleGetLength
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/*
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* Setting the handle field in Java_java_io_FileDescriptor_set for
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* standard handles stdIn, stdOut, stdErr
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*/
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#define SET_HANDLE(fd) \
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if (fd == 0) { \
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return (jlong)GetStdHandle(STD_INPUT_HANDLE); \
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} else if (fd == 1) { \
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return (jlong)GetStdHandle(STD_OUTPUT_HANDLE); \
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} else if (fd == 2) { \
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return (jlong)GetStdHandle(STD_ERROR_HANDLE); \
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} else { \
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return (jlong)-1; \
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} \
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/* INVALID_FILE_ATTRIBUTES is not defined in VC++6.0's header files but
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* in later release. Keep here just in case someone is still using VC++6.0
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*/
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#ifndef INVALID_FILE_ATTRIBUTES
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#define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
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#endif
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