C4StdInProc.cpp

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 2005, Peter Wortmann
 * Copyright (c) 2005-2006, Günther Brammer
 * Copyright (c) 2010-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
#include "C4Include.h"
#include "platform/C4StdInProc.h"
 
#include "game/C4Application.h"
 
#ifdef HAVE_LIBREADLINE
#include <readline.h>
#include <history.h>
 
static void readline_callback (char * line)
{
    if (!line)
    {
        Application.Quit();
    }
    else
    {
        Application.OnCommand(line);
    }
    if (line && *line)
    {
        add_history (line);
    }
    free(line);
}
 
C4StdInProc::C4StdInProc()
{
    rl_callback_handler_install ("", readline_callback);
}
 
C4StdInProc::~C4StdInProc()
{
    rl_callback_handler_remove();
}
 
bool C4StdInProc::Execute(int iTimeout, pollfd *)
{
    rl_callback_read_char();
    return true;
}
 
#else
 
C4StdInProc::C4StdInProc() = default;
 
C4StdInProc::~C4StdInProc() = default;
 
bool C4StdInProc::Execute(int iTimeout, pollfd *)
{
    // Surely not the most efficient way to do it, but we won't have to read much data anyway.
    char c;
    if (read(0, &c, 1) != 1)
    {
        Application.Quit();
        return false;
    }
    if (c == '\n')
    {
        if (!CmdBuf.isNull())
        {
            Application.OnCommand(CmdBuf.getData());
            CmdBuf.Clear();
        }
    }
    else if (isprint((unsigned char)c))
        CmdBuf.AppendChar(c);
    return true;
}
 
#endif /* HAVE_LIBREADLINE */