Log.cc

// Copyright (c) 2022 by István Váradi
 
// This file is part of VSCPL, a simple cross-platform utility library
 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
 
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
 
//------------------------------------------------------------------------------
 
#include "Log.h"
 
#include <cstdio>
#include <cstdarg>
 
//------------------------------------------------------------------------------
 
using hu::varadiistvan::scpl::Log;
 
//------------------------------------------------------------------------------
 
namespace {
 
//------------------------------------------------------------------------------
 
std::function<void(const char*)> logFunction;
 
//------------------------------------------------------------------------------
 
} /* anonymous namespace */
 
//------------------------------------------------------------------------------
 
void Log::registerFunction(std::function<void(const char*)> fn)
{
    logFunction = fn;
}
 
//------------------------------------------------------------------------------
 
void Log::log(const char* format, ...)
{
    if (logFunction) {
        va_list ap;
        va_start(ap, format);
 
        char buf[256];
        vsnprintf(buf, sizeof(buf), format, ap);
 
        va_end(ap);
 
        logFunction(buf);
    } else {
        va_list ap;
        va_start(ap, format);
 
        vprintf(format, ap);
 
        va_end(ap);
    }
}
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
 
// Local Variables:
// mode: C++
// c-basic-offset: 4
// indent-tabs-mode: nil
// End: