1 /*

     2  * Copyright (c) 2005, 2013, 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 #include "jvm.h"

    29 #include "java_io_Console.h"

    30 

    31 #include <stdlib.h>

    32 #include <Wincon.h>

    33 

    34 static HANDLE hStdOut = INVALID_HANDLE_VALUE;

    35 static HANDLE hStdIn = INVALID_HANDLE_VALUE;

    36 JNIEXPORT jboolean JNICALL

    37 Java_java_io_Console_istty(JNIEnv *env, jclass cls)

    38 {

    39     if (hStdIn == INVALID_HANDLE_VALUE &&

    40         (hStdIn = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

    41         return JNI_FALSE;

    42     }

    43     if (hStdOut == INVALID_HANDLE_VALUE &&

    44         (hStdOut = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

    45         return JNI_FALSE;

    46     }

    47     if (GetFileType(hStdIn) != FILE_TYPE_CHAR ||

    48         GetFileType(hStdOut) != FILE_TYPE_CHAR)

    49         return JNI_FALSE;

    50     return JNI_TRUE;

    51 }

    52 

    53 JNIEXPORT jstring JNICALL

    54 Java_java_io_Console_encoding(JNIEnv *env, jclass cls)

    55 {

    56     char buf[64];

    57     int cp = GetConsoleCP();

    58     if (cp >= 874 && cp <= 950)

    59         sprintf(buf, "ms%d", cp);

    60     else

    61         sprintf(buf, "cp%d", cp);

    62     return JNU_NewStringPlatform(env, buf);

    63 }

    64 

    65 JNIEXPORT jboolean JNICALL

    66 Java_java_io_Console_echo(JNIEnv *env, jclass cls, jboolean on)

    67 {

    68     DWORD fdwMode;

    69     jboolean old;

    70     if (! GetConsoleMode(hStdIn, &fdwMode)) {

    71         JNU_ThrowIOExceptionWithLastError(env, "GetConsoleMode failed");

    72         return !on;

    73     }

    74     old = (fdwMode & ENABLE_ECHO_INPUT) != 0;

    75     if (on) {

    76         fdwMode |= ENABLE_ECHO_INPUT;

    77     } else {

    78         fdwMode &= ~ENABLE_ECHO_INPUT;

    79     }

    80     if (! SetConsoleMode(hStdIn, fdwMode)) {

    81         JNU_ThrowIOExceptionWithLastError(env, "SetConsoleMode failed");

    82     }

    83     return old;

    84 }