file_access_buffered_fa.h

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/*  file_access_buffered_fa.h                                            */
/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#ifndef FILE_ACCESS_BUFFERED_FA_H
#define FILE_ACCESS_BUFFERED_FA_H

#include "core/io/file_access_buffered.h"

template<class T>
class FileAccessBufferedFA : public FileAccessBuffered {

    T f;

    int read_data_block(int p_offset, int p_size, uint8_t *p_dest = 0) const {

        ERR_FAIL_COND_V( !f.is_open(), -1 );

        ((T*)&f)->seek(p_offset);

        if (p_dest) {

            f.get_buffer(p_dest, p_size);
            return p_size;

        } else {

            cache.offset = p_offset;
            cache.buffer.resize(p_size);

            // on dvector
            //DVector<uint8_t>::Write write = cache.buffer.write();
            //f.get_buffer(write.ptr(), p_size);

            // on vector
            f.get_buffer(cache.buffer.ptr(), p_size);

            return p_size;
        };
    };

    static FileAccess* create() {

        return memnew( FileAccessBufferedFA<T>() );
    };

protected:
    virtual void _set_access_type(AccessType p_access) {
        f._set_access_type(p_access);
        FileAccessBuffered::_set_access_type(p_access);
    };

public:


    void store_8(uint8_t p_dest) {

        f.store_8(p_dest);
    };

    void store_buffer(const uint8_t *p_src,int p_length) {

        f.store_buffer(p_src, p_length);
    };

    bool file_exists(const String& p_name) {

        return f.file_exists(p_name);
    };

    Error _open(const String& p_path, int p_mode_flags) {

        close();

        Error ret = f._open(p_path, p_mode_flags);
        if (ret !=OK)
            return ret;
        //ERR_FAIL_COND_V( ret != OK, ret );

        file.size = f.get_len();
        file.offset = 0;
        file.open = true;
        file.name = p_path;
        file.access_flags = p_mode_flags;

        cache.buffer.resize(0);
        cache.offset = 0;

        return set_error(OK);
    };

    void close() {

        f.close();

        file.offset = 0;
        file.size = 0;
        file.open = false;
        file.name = "";

        cache.buffer.resize(0);
        cache.offset = 0;
        set_error(OK);
    };

//  static void make_default() {

        //FileAccess::create_func = FileAccessBufferedFA<T>::create;
//  };

    virtual uint64_t _get_modified_time(const String& p_file) {

        return f._get_modified_time(p_file);
    }

    FileAccessBufferedFA() {


    };
};


#endif // FILE_ACCESS_BUFFERED_FA_H