icinga2/lib/base/stream.cpp

78 lines
2.6 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
* *
* This program 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 program 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 program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "base/stream.h"
#include "base/objectlock.h"
#include "base/utility.h"
#include <boost/algorithm/string/trim.hpp>
using namespace icinga;
bool Stream::ReadLine(String *line, ReadLineContext& context)
{
if (context.Eof)
return false;
for (;;) {
if (context.MustRead) {
context.Buffer = (char *)realloc(context.Buffer, context.Size + 4096);
if (!context.Buffer)
throw std::bad_alloc();
size_t rc = Read(context.Buffer + context.Size, 4096);
if (rc == 0) {
*line = String(context.Buffer, &(context.Buffer[context.Size]));
boost::algorithm::trim_right(*line);
context.Eof = true;
return true;
}
context.Size += rc;
}
int count = 0;
size_t first_newline;
for (size_t i = 0; i < context.Size; i++) {
if (context.Buffer[i] == '\n') {
count++;
if (count == 1)
first_newline = i;
}
}
context.MustRead = (count <= 1);
if (count > 0) {
*line = String(context.Buffer, &(context.Buffer[first_newline]));
boost::algorithm::trim_right(*line);
memmove(context.Buffer, context.Buffer + first_newline + 1, context.Size - first_newline - 1);
context.Size -= first_newline + 1;
return true;
}
}
}