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//
// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
//
// 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.
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#ifdef _WIN32
#include <winsock.h>
#define write(s,b,l) send(s,(const char*)b,l,0)
#undef errno
#define errno WSAGetLastError()
#else
#include <unistd.h>
#include <sys/time.h>
#endif
#include <rdr/FdOutStream.h>
#include <rdr/Exception.h>
using namespace rdr;
enum { DEFAULT_BUF_SIZE = 16384,
MIN_BULK_SIZE = 1024 };
FdOutStream::FdOutStream(int fd_, int bufSize_)
: fd(fd_), bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0)
{
ptr = start = new U8[bufSize];
end = start + bufSize;
}
FdOutStream::~FdOutStream()
{
try {
flush();
} catch (Exception&) {
}
delete [] start;
}
void FdOutStream::writeBytes(const void* data, int length)
{
if (length < MIN_BULK_SIZE) {
OutStream::writeBytes(data, length);
return;
}
const U8* dataPtr = (const U8*)data;
flush();
while (length > 0) {
int n = write(fd, dataPtr, length);
if (n < 0) throw SystemException("write",errno);
length -= n;
dataPtr += n;
offset += n;
}
}
int FdOutStream::length()
{
return offset + ptr - start;
}
void FdOutStream::flush()
{
U8* sentUpTo = start;
while (sentUpTo < ptr) {
int n = write(fd, (const void*) sentUpTo, ptr - sentUpTo);
if (n < 0) throw SystemException("write",errno);
sentUpTo += n;
offset += n;
}
ptr = start;
}
int FdOutStream::overrun(int itemSize, int nItems)
{
if (itemSize > bufSize)
throw Exception("FdOutStream overrun: max itemSize exceeded");
flush();
if (itemSize * nItems > end - ptr)
nItems = (end - ptr) / itemSize;
return nItems;
}
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