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/*
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* Copyright 2000-2003 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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#include <windows.h>
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#include <winsock2.h>
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#include <io.h>
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#include "jni.h"
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#include "jni_util.h"
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#include "jvm.h"
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#include "jlong.h"
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#include "nio.h"
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#include "nio_util.h"
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#include "sun_nio_ch_IOUtil.h"
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/* field id for jlong 'handle' in java.io.FileDescriptor used for file fds */
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static jfieldID handle_fdID;
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/* field id for jint 'fd' in java.io.FileDescriptor used for socket fds */
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static jfieldID fd_fdID;
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/* false for 95/98/ME, true for NT/W2K */
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static jboolean onNT = JNI_FALSE;
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JNIEXPORT jboolean JNICALL
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Java_sun_security_provider_NativeSeedGenerator_nativeGenerateSeed
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(JNIEnv *env, jclass clazz, jbyteArray randArray);
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/**************************************************************
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* static method to store field IDs in initializers
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*/
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JNIEXPORT void JNICALL
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Java_sun_nio_ch_IOUtil_initIDs(JNIEnv *env, jclass clazz)
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{
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OSVERSIONINFO ver;
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ver.dwOSVersionInfoSize = sizeof(ver);
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GetVersionEx(&ver);
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if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) {
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onNT = JNI_TRUE;
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}
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clazz = (*env)->FindClass(env, "java/io/FileDescriptor");
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fd_fdID = (*env)->GetFieldID(env, clazz, "fd", "I");
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handle_fdID = (*env)->GetFieldID(env, clazz, "handle", "J");
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}
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/**************************************************************
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* IOUtil.c
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*/
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JNIEXPORT jboolean JNICALL
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Java_sun_nio_ch_IOUtil_randomBytes(JNIEnv *env, jclass clazz,
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jbyteArray randArray)
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{
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return
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Java_sun_security_provider_NativeSeedGenerator_nativeGenerateSeed(env,
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clazz,
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randArray);
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}
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jint
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convertReturnVal(JNIEnv *env, jint n, jboolean reading)
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{
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if (n > 0) /* Number of bytes written */
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return n;
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if (n == 0) {
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if (reading) {
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return IOS_EOF; /* EOF is -1 in javaland */
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} else {
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return 0;
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}
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}
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JNU_ThrowIOExceptionWithLastError(env, "Read/write failed");
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return IOS_THROWN;
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}
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jlong
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convertLongReturnVal(JNIEnv *env, jlong n, jboolean reading)
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{
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if (n > 0) /* Number of bytes written */
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return n;
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if (n == 0) {
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if (reading) {
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return IOS_EOF; /* EOF is -1 in javaland */
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} else {
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return 0;
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}
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}
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JNU_ThrowIOExceptionWithLastError(env, "Read/write failed");
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return IOS_THROWN;
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}
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JNIEXPORT jint JNICALL
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Java_sun_nio_ch_IOUtil_fdVal(JNIEnv *env, jclass clazz, jobject fdo)
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{
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return fdval(env, fdo);
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}
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JNIEXPORT void JNICALL
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Java_sun_nio_ch_IOUtil_setfdVal(JNIEnv *env, jclass clazz, jobject fdo, jint val)
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{
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(*env)->SetIntField(env, fdo, fd_fdID, val);
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}
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#define SET_BLOCKING 0
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#define SET_NONBLOCKING 1
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JNIEXPORT void JNICALL
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Java_sun_nio_ch_IOUtil_configureBlocking(JNIEnv *env, jclass clazz,
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jobject fdo, jboolean blocking)
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{
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u_long argp;
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int result = 0;
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jint fd = fdval(env, fdo);
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if (blocking == JNI_FALSE) {
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argp = SET_NONBLOCKING;
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} else {
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argp = SET_BLOCKING;
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/* Blocking fd cannot be registered with EventSelect */
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WSAEventSelect(fd, NULL, 0);
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}
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result = ioctlsocket(fd, FIONBIO, &argp);
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if (result == SOCKET_ERROR) {
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int error = WSAGetLastError();
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handleSocketError(env, (jint)error);
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}
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}
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/* Note: Drain uses the int fd value. It is currently not called
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on windows.
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*/
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JNIEXPORT jboolean JNICALL
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Java_sun_nio_ch_IOUtil_drain(JNIEnv *env, jclass cl, jint fd)
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{
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DWORD read = 0;
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int totalRead = 0;
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BOOL result = 0;
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HANDLE h = (HANDLE)_get_osfhandle(fd);
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char buf[128];
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if (h == INVALID_HANDLE_VALUE) {
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JNU_ThrowIOExceptionWithLastError(env, "Read failed");
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return JNI_FALSE;
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}
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for (;;) {
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result = ReadFile(h, /* File handle to read */
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(LPVOID)&buf, /* address to put data */
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128, /* number of bytes to read */
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&read, /* number of bytes read */
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NULL); /* no overlapped struct */
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if (result == 0) {
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int error = GetLastError();
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if (error == ERROR_NO_DATA) {
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return (totalRead > 0) ? JNI_TRUE : JNI_FALSE;
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}
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JNU_ThrowIOExceptionWithLastError(env, "Drain");
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return JNI_FALSE;
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}
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if (read > 0) {
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totalRead += read;
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} else {
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break;
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}
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}
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return (totalRead > 0) ? JNI_TRUE : JNI_FALSE;
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}
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/* Note: This function returns the int fd value from file descriptor.
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It is mostly used for sockets which should use the int fd value.
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*/
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jint
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fdval(JNIEnv *env, jobject fdo)
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{
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return (*env)->GetIntField(env, fdo, fd_fdID);
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}
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jlong
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handleval(JNIEnv *env, jobject fdo)
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{
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return (*env)->GetLongField(env, fdo, handle_fdID);
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}
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jboolean
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isNT()
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{
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return onNT;
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}
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