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

77 строки
1.8 KiB
C++

/* -*- 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):
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "FileReader.h"
bool FileReader::readU1(char *destp, int numItems)
{
return read1(destp, numItems);
}
#ifdef IS_LITTLE_ENDIAN
#define flipU2(x) (((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8)
#else
#define flipU2(x) (x)
#endif
bool FileReader::readU2(Uint16 *destp, int numItems)
{
if (!read1((char *) destp, numItems*2))
return false;
#ifdef IS_LITTLE_ENDIAN
for (numItems--; numItems >= 0; numItems--)
destp[numItems] = flipU2(destp[numItems]);
#endif
return true;
}
#ifdef IS_LITTLE_ENDIAN
#define flipU4(x) (((x) >> 24) |\
((((x) << 8) >> 24) << 8) |\
((((x) << 16) >> 24) << 16) |\
((x) << 24))
#else
#define flipU4(x) (x)
#endif
bool FileReader::readU4(Uint32 *destp, int numItems)
{
if (!read1((char *) destp, numItems*4))
return false;
#ifdef IS_LITTLE_ENDIAN
for (numItems--; numItems >= 0; numItems--)
destp[numItems] = flipU4(destp[numItems]);
#endif
return true;
}