glog_emulator.hpp

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#ifndef __OPENCV_DNN_CAFFE_GLOG_EMULATOR_HPP__
#define __OPENCV_DNN_CAFFE_GLOG_EMULATOR_HPP__
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <opencv2/core.hpp>

#define CHECK(cond)     for(cv::dnn::GLogWrapper _logger(__FILE__, CV_Func, __LINE__, "CHECK", #cond, cond); _logger.exit(); _logger.check()) _logger.stream()
#define CHECK_EQ(a, b)  for(cv::dnn::GLogWrapper _logger(__FILE__, CV_Func, __LINE__, "CHECK", #a"="#b, ((a) == (b))); _logger.exit(); _logger.check()) _logger.stream()
#define LOG(TYPE)       for(cv::dnn::GLogWrapper _logger(__FILE__, CV_Func, __LINE__, #TYPE); _logger.exit(); _logger.check()) _logger.stream()

namespace cv
{
namespace dnn
{

class GLogWrapper
{
    const char *file, *func, *type, *cond_str;
    int line;
    bool cond_status, exit_loop;
    std::stringstream sstream;

public:

    GLogWrapper(const char *_file, const char *_func, int _line,
          const char *_type,
          const char *_cond_str = NULL, bool _cond_status = true
    ) :
        file(_file), func(_func), type(_type), cond_str(_cond_str),
        line(_line), cond_status(_cond_status), exit_loop(true) {}

    std::iostream &stream()
    {
        return sstream;
    }

    bool exit()
    {
        return exit_loop;
    }

    void check()
    {
        exit_loop = false;

        if (cond_str && !cond_status)
        {
            cv::error(cv::Error::StsError, "FAILED: " + String(cond_str) + ". " + sstream.str(), func, file, line);
        }
        else if (!cond_str && strcmp(type, "CHECK"))
        {
            #ifndef NDEBUG
            if (!std::strcmp(type, "INFO"))
                std::cout << sstream.str() << std::endl;
            else
                std::cerr << sstream.str() << std::endl;
            #endif
        }
    }
};

}
}
#endif