file_help.cpp

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/*
**  ClanLib SDK
**  Copyright (c) 1997-2005 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
*/

#include "precomp.h"
#include "file_help.h"
#include "string_help.h"
#include "exception.h"
#include "file.h"

// CL_FileHelp Operations:

void CL_FileHelp::copy_file(const CL_String &from, const CL_String &to, bool copy_always)
{
#ifdef WIN32
        BOOL result = CopyFile(from.c_str(), to.c_str(), copy_always ? TRUE : FALSE);
        if (result == FALSE)
                throw CL_Exception(TEXT("Unable to copy file"));
#else
        CL_File input_file(from, CL_File::open_existing);
        CL_File output_file(to, CL_File::create_always);
        char buffer[16*1024];
        while (true)
        {
                int bytes_read = input_file.read(buffer, 16*1024);
                if (bytes_read <= 0)
                        break;
                
                int bytes_written = output_file.write(buffer, bytes_read);
                if (bytes_written != bytes_read)
                {
                        output_file.close();
                        CL_FileHelp::delete_file(to);
                        throw CL_Exception(TEXT("Unable to copy file"));
                }
        }
#endif
}

void CL_FileHelp::delete_file(const CL_String &filename)
{
#ifdef WIN32
        BOOL result = DeleteFile(filename.c_str());
        if (result == FALSE)
                throw CL_Exception(TEXT("Unable to delete file"));
#else
        CL_StringA filename_local8 = CL_StringHelp::text_to_local8(filename);
        int result = unlink(filename_local8.c_str());
        if (result == -1)
                throw CL_Exception(TEXT("Unable to delete file"));
#endif
}

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