MemFile.h

// $Id: MemFile.h 21 2010-09-05 04:18:17Z cschwarz1 $

#ifndef BASE_MEMFILE_H
#define BASE_MEMFILE_H

#include "File.h"

namespace base {

    class PPBASE_EXPORT MemFile {
    public:

        MemFile(size_t limit = 1048576);

        ~MemFile();

        MemFile *clone() const;


        size_t getPos() const;


        const char *getSourceBuffer(size_t *rsize = NULL) const;


        File *getSourceFile() const;


        String *getSourceString() const;


        bool isInMemory() const;


        const char *loadIntoMemory(size_t *rsize = NULL);


        size_t read(void *buf, size_t count, bool exact = false);


        size_t read(String &buf, size_t count, bool exact = false);


        bool readln(String &rbuf, bool strip = false);


        File *saveToFile();


        void seek(size_t pos);

        void seekBOF();

        void seekEOF();


        void setLimit(size_t limit);


        void setSource(const MemFile *source);


        void setSourceBuffer(const char *buf, size_t bufsize, bool own = false);


        void setSourceFile(File *file, bool own = false);


        void setSourceFile(const String &name, int flags = File::ofReadOnly);


        void setSourceString(String *str, bool own = false);


        size_t size() const;


        void truncate(size_t len);


        size_t write(const void *buf, size_t count, bool exact = true);


        size_t write(const String &buf, bool exact = true);

    private:
        const char  *_buf;        
        bool         _buf_own;    
        File        *_file;       
        bool         _file_own;   
        size_t       _limit;      
        size_t       _pos;        
        size_t       _size;       
        String      *_str;        
        bool         _str_own;    

        DISALLOW_COPY_CONSTRUCTOR_AND_ASSIGNMENT(MemFile);
    };
}

#endif