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 }
  85 
  86 JNIEXPORT jboolean JNICALL
  87 Java_java_io_Console_echo0(JNIEnv *env, jclass cls)
  88 {
  89     DWORD fdwMode;
  90     if (! GetConsoleMode(hStdIn, &fdwMode)) {
  91         JNU_ThrowIOExceptionWithLastError(env, "GetConsoleMode failed");
  92         return JNI_TRUE;
  93     }
  94     return (fdwMode & ENABLE_ECHO_INPUT) != 0;
  95 }