/*
   filesystem/file.c
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#include "filesystem/diskfile.h" 

namespace filesystem {

DiskFile::DiskFile()
{
	diskfile_handle = 0;
}

DiskFile::~DiskFile()
{
	if (diskfile_handle)
		fclose(diskfile_handle);
}

bool DiskFile::open(const char *filename) 
{
	if (diskfile_handle) {
		con_warn << file_name << " already open!" << std::endl;
		return false;
	}

	file_name.assign(filename);
	std::string fn;
	
	 // if moddir is set, try the mods subdir first
        if (moddir.size()) {
                // try homedir + moddir
                file_path = homedir;
                file_path.append(moddir);
		fn = file_path;
                fn.append(filename);
		diskfile_handle = fopen(fn.c_str(), "rb");
		if (diskfile_handle)
			return true;

                // try datadir + moddir
                file_path = datadir;
                file_path.append(moddir);
		fn = file_path;
		fn.append(filename);
		diskfile_handle = fopen(fn.c_str(), "rb");
		if (diskfile_handle)
			return true;
        }
	// try homedir + basedir 
	file_path = homedir;
	file_path.append(basedir);
	fn = file_path;
	fn.append(filename);
	diskfile_handle = fopen(fn.c_str(), "rb");
	if (diskfile_handle)
		return true;

	// try datadir + basedir
        file_path = datadir;
	file_path.append(basedir);
	fn = file_path;
        fn.append(filename);
	diskfile_handle = fopen(fn.c_str(), "rb");
	if (diskfile_handle)
		return true;
	
	//con_error << "Could not open " << filename << std::endl;
	return false;
}

void DiskFile::close()
{
	if (diskfile_handle)
		fclose(diskfile_handle);
	diskfile_handle = 0;
}

size_t DiskFile::read(void *buffer, const size_t count)
{
	if (!diskfile_handle)
		return 0;

	return (fread(buffer, count, 1, diskfile_handle));
}

void DiskFile::skip(size_t count)
{
	fseek(diskfile_handle, (long) count, SEEK_CUR);
}

} // namespace filesystem