File content as of revision 0:8ccbd963e74d:

/*
  TCPSocketConnection.cpp
  2014 Copyright (c) Seeed Technology Inc.  All right reserved.

  Author:lawliet zou(lawliet.zou@gmail.com)
  2014-2-24

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "TCPSocketConnection.h"

static int size;
TCPSocketConnection::TCPSocketConnection()
{
    size = 0;
}

int TCPSocketConnection::connect(const char* host, const int port)
{
    if (_sock_fd < 0) {
        _sock_fd = gprs->new_socket();
        if (_sock_fd < 0) {
            return -1;
        }
    }

    if (!gprs->connect(_sock_fd, TCP, host, port)) {
        return false;
    }
    return true;
}

bool TCPSocketConnection::is_connected(void)
{
    return gprs->is_connected(_sock_fd);
}

int TCPSocketConnection::send(char* data, int length)
{
    int size = gprs->wait_writeable(_sock_fd, length);
    if (size < 0) {
        return -1;
    }
    if (size > length) {
        size = length;
    }
    return gprs->send(_sock_fd, data, size);
}

int TCPSocketConnection::send_all(char* data, int length)
{
    return send(data,length);
}

int TCPSocketConnection::receive(char* data, int length)
{
    if (size < 0) {
        return -1;
    }
    if(size == 0) {
        size = gprs->wait_readable(_sock_fd, DEFAULT_TIMEOUT);
    }

    if(size > length) {
        size = size - length;
    } else {
        length = size;
        size = -1;
    }
    return gprs->recv(_sock_fd, data, length);
}

int TCPSocketConnection::receive_all(char* data, int length)
{
    return receive(data,length);
}