115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
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/* Copyright 2013 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "JavaUtils.h"
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#include "osutils.h"
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#include "pathutils.h"
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#include <QStringList>
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#include <QString>
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#include <QDir>
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#include <QDebug>
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#if WINDOWS
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#include <windows.h>
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#endif
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JavaUtils::JavaUtils()
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{
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}
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#if WINDOWS
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QStringList JavaUtils::FindJavaPath()
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{
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QStringList paths;
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HKEY jreKey;
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QString jreKeyName = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, jreKeyName.toStdString().c_str(), 0, KEY_READ | KEY_WOW64_64KEY, &jreKey) == ERROR_SUCCESS)
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{
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// Read the current JRE version from the registry.
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// This will be used to find the key that contains the JavaHome value.
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char *value = new char[0];
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DWORD valueSz = 0;
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if (RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE*)value, &valueSz) == ERROR_MORE_DATA)
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{
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value = new char[valueSz];
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RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE*)value, &valueSz);
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}
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RegCloseKey(jreKey);
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// Now open the registry key for the JRE version that we just got.
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jreKeyName.append("\\").append(value);
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, jreKeyName.toStdString().c_str(), 0, KEY_READ | KEY_WOW64_64KEY, &jreKey) == ERROR_SUCCESS)
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{
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// Read the JavaHome value to find where Java is installed.
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value = new char[0];
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valueSz = 0;
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if (RegQueryValueExA(jreKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz) == ERROR_MORE_DATA)
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{
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value = new char[valueSz];
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RegQueryValueExA(jreKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz);
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paths << QDir(PathCombine(value, "bin")).absoluteFilePath("java.exe");
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}
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RegCloseKey(jreKey);
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}
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}
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if(paths.length() <= 0)
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{
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qWarning() << "Failed to find Java in the Windows registry - defaulting to \"java\"";
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paths << "java";
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}
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return paths;
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}
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#elif OSX
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QStringList JavaUtils::FindJavaPath()
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{
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qWarning() << "OS X Java detection incomplete - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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}
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#elif LINUX
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QStringList JavaUtils::FindJavaPath()
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{
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qWarning() << "Linux Java detection incomplete - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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}
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#else
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QStringList JavaUtils::FindJavaPath()
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{
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qWarning() << "Unknown operating system build - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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}
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#endif
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