CMSWindowsUtil.cpp

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2012 Bolton Software Ltd.
 * Copyright (C) 2004 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "CMSWindowsUtil.h"
#include "CStringUtil.h"
#include <stdio.h>

//
// CMSWindowsUtil
//

CString
CMSWindowsUtil::getString(HINSTANCE instance, DWORD id)
{
    char buffer[1024];
    int size = static_cast<int>(sizeof(buffer) / sizeof(buffer[0]));
    char* msg = buffer;

    // load string
    int n = LoadString(instance, id, msg, size);
    msg[n] = '\0';
    if (n < size) {
        return msg;
    }

    // not enough buffer space.  keep trying larger buffers until
    // we get the whole string.
    msg = NULL;
    do {
        size <<= 1;
        delete[] msg;
        char* msg = new char[size];
        n = LoadString(instance, id, msg, size);
    } while (n == size);
    msg[n] = '\0';

    CString result(msg);
    delete[] msg;
    return result;
}

CString
CMSWindowsUtil::getErrorString(HINSTANCE hinstance, DWORD error, DWORD id)
{
    char* buffer;
    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                                FORMAT_MESSAGE_IGNORE_INSERTS |
                                FORMAT_MESSAGE_FROM_SYSTEM,
                                0,
                                error,
                                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                                (LPTSTR)&buffer,
                                0,
                                NULL) == 0) {
        CString errorString = CStringUtil::print("%d", error);
        return CStringUtil::format(getString(hinstance, id).c_str(),
                            errorString.c_str());
    }
    else {
        CString result(buffer);
        LocalFree(buffer);
        return result;
    }
}