1 /* 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "jni.h" 27 #include "jni_util.h" 28 29 /* 30 * Prototypes for functions in io_util_md.c called from io_util, 31 * FileDescriptor.c, FileInputStream.c, FileOutputStream.c 32 */ 33 WCHAR* pathToNTPath(JNIEnv *env, jstring path, jboolean throwFNFE); 34 WCHAR* fileToNTPath(JNIEnv *env, jobject file, jfieldID id); 35 WCHAR* getPrefixed(const WCHAR* path, int pathlen); 36 WCHAR* currentDir(int di); 37 int currentDirLength(const WCHAR* path, int pathlen); 38 void fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags); 39 int handleAvailable(jlong fd, jlong *pbytes); 40 JNIEXPORT int handleSync(jlong fd); 41 int handleSetLength(jlong fd, jlong length); 42 JNIEXPORT jint handleRead(jlong fd, void *buf, jint len); 43 JNIEXPORT jint handleWrite(jlong fd, const void *buf, jint len); 44 JNIEXPORT jint handleAppend(jlong fd, const void *buf, jint len); 45 jint handleClose(JNIEnv *env, jobject this, jfieldID fid); 46 jlong handleLseek(jlong fd, jlong offset, jint whence); 47 48 /* 49 * Returns an opaque handle to file named by "path". If an error occurs, 50 * returns -1 and an exception is pending. 51 */ 52 jlong winFileHandleOpen(JNIEnv *env, jstring path, int flags); 53 54 /* 55 * Macros to use the right data type for file descriptors 56 */ 57 #define FD jlong 58 59 /* 60 * Macros to set/get fd from the java.io.FileDescriptor. 61 * If GetObjectField returns null, SET_FD will stop and GET_FD 62 * will simply return -1 to avoid crashing VM. 63 */ 64 #define SET_FD(this, fd, fid) \ 65 if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \ 66 (*env)->SetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID, (fd)) 67 68 #define GET_FD(this, fid) \ 69 ((*env)->GetObjectField(env, (this), (fid)) == NULL) ? \ 70 -1 : (*env)->GetLongField(env, (*env)->GetObjectField(env, (this), (fid)), IO_handle_fdID) 71 72 /* 73 * Macros to set/get fd when inside java.io.FileDescriptor 74 */ 75 #define THIS_FD(obj) (*env)->GetLongField(env, obj, IO_handle_fdID) 76 77 /* 78 * Route the routines away from VM 79 */ 80 #define IO_Append handleAppend 81 #define IO_Write handleWrite 82 #define IO_Sync handleSync 83 #define IO_Read handleRead 84 #define IO_Lseek handleLseek 85 #define IO_Available handleAvailable 86 #define IO_SetLength handleSetLength 87 88 /* 89 * Setting the handle field in Java_java_io_FileDescriptor_set for 90 * standard handles stdIn, stdOut, stdErr 91 */ 92 #define SET_HANDLE(fd) \ 93 if (fd == 0) { \ 94 return (jlong)GetStdHandle(STD_INPUT_HANDLE); \ 95 } else if (fd == 1) { \ 96 return (jlong)GetStdHandle(STD_OUTPUT_HANDLE); \ 97 } else if (fd == 2) { \ 98 return (jlong)GetStdHandle(STD_ERROR_HANDLE); \ 99 } else { \ 100 return (jlong)-1; \ 101 } \ 102 103 /* INVALID_FILE_ATTRIBUTES is not defined in VC++6.0's header files but 104 * in later release. Keep here just in case someone is still using VC++6.0 105 */ 106 #ifndef INVALID_FILE_ATTRIBUTES 107 #define INVALID_FILE_ATTRIBUTES ((DWORD)-1) 108 #endif