+++ /dev/null
-/**
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
-#include <jni.h>
-#include "windows.h"
-
-/**
- * Windows Native IO methods.
- */
-extern "C" {
-
-/**
- * Utility to format a Windows system error code into an exception.
- */
-void throwIOException(JNIEnv *env, DWORD error)
-{
- jclass ioex;
- char *msg;
-
- ioex = env->FindClass("java/io/IOException");
-
- if (ioex != NULL) {
- FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &msg, 0, NULL );
- env->ThrowNew(ioex, msg);
- LocalFree(msg);
- }
-}
-
-/**
- * Utility to throw Exceptions on bad input
- */
-void throwException(JNIEnv *env, const char *clazz, const char *msg)
-{
- jclass exc = env->FindClass(clazz);
-
- if (exc != NULL) {
- env->ThrowNew(exc, msg);
- }
-}
-
-/**
- * Opens a handle to a file.
- *
- * Class: org_apache_lucene_store_WindowsDirectory
- * Method: open
- * Signature: (Ljava/lang/String;)J
- */
-JNIEXPORT jlong JNICALL Java_org_apache_lucene_store_WindowsDirectory_open
- (JNIEnv *env, jclass ignored, jstring filename)
-{
- char *fname;
- HANDLE handle;
-
- if (filename == NULL) {
- throwException(env, "java/lang/NullPointerException", "filename cannot be null");
- return -1;
- }
-
- fname = (char *) env->GetStringUTFChars(filename, NULL);
-
- if (fname == NULL) {
- throwException(env, "java/lang/IllegalArgumentException", "invalid filename");
- return -1;
- }
-
- handle = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
-
- env->ReleaseStringUTFChars(filename, fname);
-
- if (handle == INVALID_HANDLE_VALUE) {
- throwIOException(env, GetLastError());
- return -1;
- }
-
- return (jlong) handle;
-}
-
-/**
- * Reads data into the byte array, starting at offset, for length characters.
- * The read is positioned at pos.
- *
- * Class: org_apache_lucene_store_WindowsDirectory
- * Method: read
- * Signature: (J[BIIJ)I
- */
-JNIEXPORT jint JNICALL Java_org_apache_lucene_store_WindowsDirectory_read
- (JNIEnv *env, jclass ignored, jlong fd, jbyteArray bytes, jint offset, jint length, jlong pos)
-{
- OVERLAPPED io = { 0 };
- DWORD numRead = -1;
-
- io.Offset = (DWORD) (pos & 0xFFFFFFFF);
- io.OffsetHigh = (DWORD) ((pos >> 0x20) & 0x7FFFFFFF);
-
- if (bytes == NULL) {
- throwException(env, "java/lang/NullPointerException", "bytes cannot be null");
- return -1;
- }
-
- if (length <= 4096) { /* For small buffers, avoid GetByteArrayElements' copy */
- char buffer[length];
-
- if (ReadFile((HANDLE) fd, &buffer, length, &numRead, &io)) {
- env->SetByteArrayRegion(bytes, offset, numRead, (const jbyte *) buffer);
- } else {
- throwIOException(env, GetLastError());
- numRead = -1;
- }
-
- } else {
- jbyte *buffer = env->GetByteArrayElements (bytes, NULL);
-
- if (!ReadFile((HANDLE) fd, (void *)(buffer+offset), length, &numRead, &io)) {
- throwIOException(env, GetLastError());
- numRead = -1;
- }
-
- env->ReleaseByteArrayElements(bytes, buffer, numRead == 0 || numRead == -1 ? JNI_ABORT : 0);
- }
-
- return numRead;
-}
-
-/**
- * Closes a handle to a file
- *
- * Class: org_apache_lucene_store_WindowsDirectory
- * Method: close
- * Signature: (J)V
- */
-JNIEXPORT void JNICALL Java_org_apache_lucene_store_WindowsDirectory_close
- (JNIEnv *env, jclass ignored, jlong fd)
-{
- if (!CloseHandle((HANDLE) fd)) {
- throwIOException(env, GetLastError());
- }
-}
-
-/**
- * Returns the length in bytes of a file.
- *
- * Class: org_apache_lucene_store_WindowsDirectory
- * Method: length
- * Signature: (J)J
- */
-JNIEXPORT jlong JNICALL Java_org_apache_lucene_store_WindowsDirectory_length
- (JNIEnv *env, jclass ignored, jlong fd)
-{
- BY_HANDLE_FILE_INFORMATION info;
-
- if (GetFileInformationByHandle((HANDLE) fd, (LPBY_HANDLE_FILE_INFORMATION) &info)) {
- return (jlong) (((DWORDLONG) info.nFileSizeHigh << 0x20) + info.nFileSizeLow);
- } else {
- throwIOException(env, GetLastError());
- return -1;
- }
-}
-
-} /* extern "C" */
fnp / pylucene.git / blobdiff