gecko-dev/lib/mailto/memstrem.cpp

84 lines
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):
*/
/*lame but i need it, mjudge*/
#include "xp_core.h"
#include "xp_mem.h"
#include "xp_mcom.h" /*for memcopy*/
#include "memstrem.h"
memstream::memstream()
{
mem = NULL;
sizealloc = 0;
frozen = FALSE;
memloc = 0;
buffer = DEFAULT_BUFFER_AMT;
}
memstream::memstream(int32 size, int32 bufferdelta /*= DEF*/)
{
mem = (char *)XP_ALLOC(size);
sizealloc = size;
frozen = FALSE;
memloc = 0;
buffer = bufferdelta;
}
int
memstream::write(const char *t_input,int bytesize)
{
if (frozen)
return 0; //frozen, cant write
if ((bytesize + memloc) > sizealloc)
{
sizealloc = (bytesize + memloc) + buffer;
mem = (char *)XP_REALLOC(mem, sizealloc);
if (!mem)
return 0;
}
XP_MEMCPY(mem + memloc,t_input , bytesize);
memloc +=bytesize;
return bytesize;
}
memstream::~memstream()
{
if (!frozen)
clear();
}
void
memstream::clear()
{
XP_FREEIF(mem);
sizealloc = 0;
memloc = 0;
frozen = FALSE;
}