mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2024-11-29 19:43:26 +01:00
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
|
|
* Copyright 2020 Pierre Ossman for Cendio AB
|
|
*
|
|
* This is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This software is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this software; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
* USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <rdr/BufferedInStream.h>
|
|
#include <rdr/Exception.h>
|
|
|
|
using namespace rdr;
|
|
|
|
static const size_t DEFAULT_BUF_SIZE = 8192;
|
|
|
|
BufferedInStream::BufferedInStream()
|
|
: bufSize(DEFAULT_BUF_SIZE), offset(0)
|
|
{
|
|
ptr = end = start = new U8[bufSize];
|
|
}
|
|
|
|
BufferedInStream::~BufferedInStream()
|
|
{
|
|
delete [] start;
|
|
}
|
|
|
|
size_t BufferedInStream::pos()
|
|
{
|
|
return offset + ptr - start;
|
|
}
|
|
|
|
bool BufferedInStream::overrun(size_t needed, bool wait)
|
|
{
|
|
if (needed > bufSize)
|
|
throw Exception("BufferedInStream overrun: "
|
|
"requested size of %lu bytes exceeds maximum of %lu bytes",
|
|
(long unsigned)needed, (long unsigned)bufSize);
|
|
|
|
// Do we need to shuffle things around?
|
|
if ((bufSize - (ptr - start)) < needed) {
|
|
memmove(start, ptr, end - ptr);
|
|
|
|
offset += ptr - start;
|
|
end -= ptr - start;
|
|
ptr = start;
|
|
}
|
|
|
|
while (avail() < needed) {
|
|
if (!fillBuffer(start + bufSize - end, wait))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|