gecko-dev/ef/Runtime/FileReader/FileReader.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef _FILEREADER_H_
#define _FILEREADER_H_
#include "prtypes.h"
#include "Pool.h"
#ifdef NO_NSPR
#include <stdio.h>
#else
#include "prio.h"
#endif
/* Reads a file, allocating space as neccessary */
class FileReader {
public:
FileReader(Pool &pool): pool(pool) { }
/* All read routines return True on success, False on failure */
/* read an unsigned byte */
bool readU1(char *destp, Int32 numItems);
/* read numItems unsigned 16-bit quantities, flipping bytes if neccessary.
* Returns true on success, false if unable to read numItems.
*/
bool readU2(Uint16 *destp, Int32 numItems);
/* read an unsigned 32-bit quantity, flipping bytes if neccessary */
bool readU4(Uint32 *destp, Int32 numItems);
virtual ~FileReader() { }
protected:
/* Yes this is an abstract class */
virtual bool read1(char *destp, int size) = 0;
Pool &pool;
};
#endif /* _FILEREADER_H_ */