inputsource_provider_file.cpp

这是一款2d游戏引擎

/*  $Id: inputsource_provider_file.cpp,v 1.16 2003/09/05 00:16:11 sphair Exp $
**
**  ClanLib Game SDK
**  Copyright (C) 2003  The ClanLib Team
**  For a total list of contributers see the file CREDITS.
**
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Lesser General Public
**  License as published by the Free Software Foundation; either
**  version 2.1 of the License, or (at your option) any later version.
**
**  This library 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
**  Lesser General Public License for more details.
**
**  You should have received a copy of the GNU Lesser General Public
**  License along with this library; if not, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
**
*/

#include "Core/precomp.h"
#ifdef WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif

#include <API/Core/IOData/inputsource_provider_file.h>
#include <API/Core/IOData/inputsource_file.h>

CL_InputSourceProvider_File::CL_InputSourceProvider_File(const std::string &path)
{
	char cwd[1026];
	if (getcwd(cwd, 1024) == NULL) throw CL_Error("Working dir is more than 1024 characters!");
	int len = strlen(cwd);
	if (cwd[len-1] != '/' && cwd[len-1] != '\\') strcat(cwd, "/");

	// try to figure out if path is absolute.
	if (path.length() == 0)
	{
		// path is relative

		provider_path = std::string(cwd) + std::string(path);
	}
	else if (path[0] == '\\' || path[0] == '/' || path[1] == ':')
	{
		// path is absolute
		provider_path = std::string(path);
	}
	else
	{
		// path is relative
		provider_path = std::string(cwd) + std::string(path);
	}

	// make sure the resulting path that we create ends with a '/'
	// this is *also* explicitly needed for everything that tries to load
	// something with inputprovider(".") ==> when "creating" surfaces without using
	// the resource system

	len=provider_path.length();
	if (provider_path[len-1] != '/' && provider_path[len-1] != '\\') 
		provider_path += '/';
}

CL_InputSourceProvider *CL_InputSourceProvider::create_file_provider(const std::string &path)
{
	return new CL_InputSourceProvider_File(path);
}

CL_InputSource *CL_InputSourceProvider_File::open_source(const std::string &filename)
{
	return new CL_InputSource_File(get_pathname(filename).c_str());
}

std::string CL_InputSourceProvider_File::get_pathname(const std::string &filename)
{        
	std::string filepath;

	// if path is absolute, do not prepend provider path:
	if (filename[0] == '\\' || filename[0] == '/' || filename[1] == ':')
		filepath = filename;
	else
		filepath = provider_path + filename;

	return filepath;
}

CL_InputSourceProvider *CL_InputSourceProvider_File::create_relative(const std::string &path)
{
	return new CL_InputSourceProvider_File(provider_path + path);
}

CL_InputSourceProvider *CL_InputSourceProvider_File::clone()
{
	return new CL_InputSourceProvider_File(provider_path);
}