source: vendor/synergy/current/lib/arch/CArchMiscWindows.cpp

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2002 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file COPYING that should have accompanied this file.
 * 
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include "CArchMiscWindows.h"
#include "CArchDaemonWindows.h"

#ifndef ES_SYSTEM_REQUIRED
#define ES_SYSTEM_REQUIRED  ((DWORD)0x00000001)
#endif
#ifndef ES_DISPLAY_REQUIRED
#define ES_DISPLAY_REQUIRED ((DWORD)0x00000002)
#endif
#ifndef ES_CONTINUOUS
#define ES_CONTINUOUS       ((DWORD)0x80000000)
#endif
typedef DWORD EXECUTION_STATE;

//
// CArchMiscWindows
//

CArchMiscWindows::CDialogs* CArchMiscWindows::s_dialogs   = NULL;
DWORD                                           CArchMiscWindows::s_busyState = 0;
CArchMiscWindows::STES_t        CArchMiscWindows::s_stes      = NULL;
HICON                                           CArchMiscWindows::s_largeIcon = NULL;
HICON                                           CArchMiscWindows::s_smallIcon = NULL;

void
CArchMiscWindows::init()
{
        s_dialogs = new CDialogs;
        isWindows95Family();
}

bool
CArchMiscWindows::isWindows95Family()
{
        static bool init   = false;
        static bool result = false;

        if (!init) {
                OSVERSIONINFO version;
                version.dwOSVersionInfoSize = sizeof(version);
                if (GetVersionEx(&version) == 0) {
                        // cannot determine OS;  assume windows 95 family
                        result = true;
                }
                else {
                        result = (version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
                }
                init = true;
        }
        return result;
}

bool
CArchMiscWindows::isWindowsModern()
{
        static bool init   = false;
        static bool result = false;

        if (!init) {
                OSVERSIONINFO version;
                version.dwOSVersionInfoSize = sizeof(version);
                if (GetVersionEx(&version) == 0) {
                        // cannot determine OS;  assume not modern
                        result = false;
                }
                else {
                        result = ((version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS &&
                                                version.dwMajorVersion == 4 &&
                                                version.dwMinorVersion > 0) ||
                                                (version.dwPlatformId == VER_PLATFORM_WIN32_NT &&
                                                version.dwMajorVersion > 4));
                }
                init = true;
        }
        return result;
}

void
CArchMiscWindows::setIcons(HICON largeIcon, HICON smallIcon)
{
        s_largeIcon = largeIcon;
        s_smallIcon = smallIcon;
}

void
CArchMiscWindows::getIcons(HICON& largeIcon, HICON& smallIcon)
{
        largeIcon = s_largeIcon;
        smallIcon = s_smallIcon;
}

int
CArchMiscWindows::runDaemon(RunFunc runFunc)
{
        return CArchDaemonWindows::runDaemon(runFunc);
}

void
CArchMiscWindows::daemonRunning(bool running)
{
        CArchDaemonWindows::daemonRunning(running);
}

void
CArchMiscWindows::daemonFailed(int result)
{
        CArchDaemonWindows::daemonFailed(result);
}

UINT
CArchMiscWindows::getDaemonQuitMessage()
{
        return CArchDaemonWindows::getDaemonQuitMessage();
}

HKEY
CArchMiscWindows::openKey(HKEY key, const TCHAR* keyName)
{
        return openKey(key, keyName, false);
}

HKEY
CArchMiscWindows::openKey(HKEY key, const TCHAR* const* keyNames)
{
        return openKey(key, keyNames, false);
}

HKEY
CArchMiscWindows::addKey(HKEY key, const TCHAR* keyName)
{
        return openKey(key, keyName, true);
}

HKEY
CArchMiscWindows::addKey(HKEY key, const TCHAR* const* keyNames)
{
        return openKey(key, keyNames, true);
}

HKEY
CArchMiscWindows::openKey(HKEY key, const TCHAR* keyName, bool create)
{
        // ignore if parent is NULL
        if (key == NULL) {
                return NULL;
        }

        // open next key
        HKEY newKey;
        LONG result = RegOpenKeyEx(key, keyName, 0,
                                                                KEY_WRITE | KEY_QUERY_VALUE, &newKey);
        if (result != ERROR_SUCCESS && create) {
                DWORD disp;
                result = RegCreateKeyEx(key, keyName, 0, TEXT(""),
                                                                0, KEY_WRITE | KEY_QUERY_VALUE,
                                                                NULL, &newKey, &disp);
        }
        if (result != ERROR_SUCCESS) {
                RegCloseKey(key);
                return NULL;
        }

        // switch to new key
        RegCloseKey(key);
        return newKey;
}

HKEY
CArchMiscWindows::openKey(HKEY key, const TCHAR* const* keyNames, bool create)
{
        for (size_t i = 0; key != NULL && keyNames[i] != NULL; ++i) {
                // open next key
                key = openKey(key, keyNames[i], create);
        }
        return key;
}

void
CArchMiscWindows::closeKey(HKEY key)
{
        assert(key  != NULL);
        RegCloseKey(key);
}

void
CArchMiscWindows::deleteKey(HKEY key, const TCHAR* name)
{
        assert(key  != NULL);
        assert(name != NULL);
        RegDeleteKey(key, name);
}

void
CArchMiscWindows::deleteValue(HKEY key, const TCHAR* name)
{
        assert(key  != NULL);
        assert(name != NULL);
        RegDeleteValue(key, name);
}

bool
CArchMiscWindows::hasValue(HKEY key, const TCHAR* name)
{
        DWORD type;
        LONG result = RegQueryValueEx(key, name, 0, &type, NULL, NULL);
        return (result == ERROR_SUCCESS &&
                        (type == REG_DWORD || type == REG_SZ));
}

CArchMiscWindows::EValueType
CArchMiscWindows::typeOfValue(HKEY key, const TCHAR* name)
{
        DWORD type;
        LONG result = RegQueryValueEx(key, name, 0, &type, NULL, NULL);
        if (result != ERROR_SUCCESS) {
                return kNO_VALUE;
        }
        switch (type) {
        case REG_DWORD:
                return kUINT;

        case REG_SZ:
                return kSTRING;

        case REG_BINARY:
                return kBINARY;

        default:
                return kUNKNOWN;
        }
}

void
CArchMiscWindows::setValue(HKEY key,
                                const TCHAR* name, const std::string& value)
{
        assert(key  != NULL);
        assert(name != NULL);
        RegSetValueEx(key, name, 0, REG_SZ,
                                                                reinterpret_cast<const BYTE*>(value.c_str()),
                                                                value.size() + 1);
}

void
CArchMiscWindows::setValue(HKEY key, const TCHAR* name, DWORD value)
{
        assert(key  != NULL);
        assert(name != NULL);
        RegSetValueEx(key, name, 0, REG_DWORD,
                                                                reinterpret_cast<CONST BYTE*>(&value),
                                                                sizeof(DWORD));
}

void
CArchMiscWindows::setValueBinary(HKEY key,
                                const TCHAR* name, const std::string& value)
{
        assert(key  != NULL);
        assert(name != NULL);
        RegSetValueEx(key, name, 0, REG_BINARY,
                                                                reinterpret_cast<const BYTE*>(value.data()),
                                                                value.size());
}

std::string
CArchMiscWindows::readBinaryOrString(HKEY key, const TCHAR* name, DWORD type)
{
        // get the size of the string
        DWORD actualType;
        DWORD size = 0;
        LONG result = RegQueryValueEx(key, name, 0, &actualType, NULL, &size);
        if (result != ERROR_SUCCESS || actualType != type) {
                return std::string();
        }

        // if zero size then return empty string
        if (size == 0) {
                return std::string();
        }

        // allocate space
        char* buffer = new char[size];

        // read it
        result = RegQueryValueEx(key, name, 0, &actualType,
                                                                reinterpret_cast<BYTE*>(buffer), &size);
        if (result != ERROR_SUCCESS || actualType != type) {
                delete[] buffer;
                return std::string();
        }

        // clean up and return value
        if (type == REG_SZ && buffer[size - 1] == '\0') {
                // don't include terminating nul;  std::string will add one.
                --size;
        }
        std::string value(buffer, size);
        delete[] buffer;
        return value;
}

std::string
CArchMiscWindows::readValueString(HKEY key, const TCHAR* name)
{
        return readBinaryOrString(key, name, REG_SZ);
}

std::string
CArchMiscWindows::readValueBinary(HKEY key, const TCHAR* name)
{
        return readBinaryOrString(key, name, REG_BINARY);
}

DWORD
CArchMiscWindows::readValueInt(HKEY key, const TCHAR* name)
{
        DWORD type;
        DWORD value;
        DWORD size = sizeof(value);
        LONG result = RegQueryValueEx(key, name, 0, &type,
                                                                reinterpret_cast<BYTE*>(&value), &size);
        if (result != ERROR_SUCCESS || type != REG_DWORD) {
                return 0;
        }
        return value;
}

void
CArchMiscWindows::addDialog(HWND hwnd)
{
        s_dialogs->insert(hwnd);
}

void
CArchMiscWindows::removeDialog(HWND hwnd)
{
        s_dialogs->erase(hwnd);
}

bool
CArchMiscWindows::processDialog(MSG* msg)
{
        for (CDialogs::const_iterator index = s_dialogs->begin();
                                                        index != s_dialogs->end(); ++index) {
                if (IsDialogMessage(*index, msg)) {
                        return true;
                }
        }
        return false;
}

void
CArchMiscWindows::addBusyState(DWORD busyModes)
{
        s_busyState |= busyModes;
        setThreadExecutionState(s_busyState);
}

void
CArchMiscWindows::removeBusyState(DWORD busyModes)
{
        s_busyState &= ~busyModes;
        setThreadExecutionState(s_busyState);
}

void
CArchMiscWindows::setThreadExecutionState(DWORD busyModes)
{
        // look up function dynamically so we work on older systems
        if (s_stes == NULL) {
                HINSTANCE kernel = LoadLibrary("kernel32.dll");
                if (kernel != NULL) {
                        s_stes = reinterpret_cast<STES_t>(GetProcAddress(kernel,
                                                        "SetThreadExecutionState"));
                }
                if (s_stes == NULL) {
                        s_stes = &CArchMiscWindows::dummySetThreadExecutionState;
                }
        }

        // convert to STES form
        EXECUTION_STATE state = 0;
        if ((busyModes & kSYSTEM) != 0) {
                state |= ES_SYSTEM_REQUIRED;
        }
        if ((busyModes & kDISPLAY) != 0) {
                state |= ES_DISPLAY_REQUIRED;
        }
        if (state != 0) {
                state |= ES_CONTINUOUS;
        }

        // do it
        s_stes(state);
}

DWORD
CArchMiscWindows::dummySetThreadExecutionState(DWORD)
{
        // do nothing
        return 0;
}