barrier/lib/platform/CMSWindowsUtil.cpp

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2004 Chris Schoeneman, Nick Bolton, Sorin Sbarnea
 * 
 * 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;
	}
}