// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
/*
 *  Copyright 2013 ZXing authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef __ZXING_H_
#define __ZXING_H_

#define ZXING_ARRAY_LEN(v) ((int)(sizeof(v)/sizeof(v[0])))
#define ZX_LOG_DIGITS(digits) \
    ((digits == 8) ? 3 : \
     ((digits == 16) ? 4 : \
      ((digits == 32) ? 5 : \
       ((digits == 64) ? 6 : \
        ((digits == 128) ? 7 : \
         (-1))))))

#ifndef ZXING_DEBUG
#define ZXING_DEBUG 0
#endif

namespace zxing {
    typedef char byte;
    typedef bool boolean;
}

#include <limits>

#if defined(_WIN32) || defined(_WIN64)

#include <float.h>

namespace zxing {
    inline bool isnan(float v) { return _isnan(v) != 0; }
    inline bool isnan(double v) { return _isnan(v) != 0; }
    inline float nan() { return std::numeric_limits<float>::quiet_NaN(); }
}

#else

#include <cmath>

namespace zxing {
    inline bool isnan(float v) { return std::isnan(v); }
    inline bool isnan(double v) { return std::isnan(v); }
    inline float nan() { return std::numeric_limits<float>::quiet_NaN(); }
}

#endif

#if ZXING_DEBUG

#include <iostream>
#include <string>

using std::cout;
using std::cerr;
using std::endl;
using std::flush;
using std::string;
using std::ostream;

#if ZXING_DEBUG_TIMER

#include <sys/time.h>

namespace zxing {

    class DebugTimer {
    public:
        DebugTimer(char const* string_) : chars(string_) {
            gettimeofday(&start, 0);
        }

        DebugTimer(std::string const& string_) : chars(0), string(string_) {
            gettimeofday(&start, 0);
        }

        void mark(char const* string) {
            struct timeval end;
            gettimeofday(&end, 0);
            int diff =
                (end.tv_sec - start.tv_sec) * 1000 * 1000 + (end.tv_usec - start.tv_usec);

            cerr << diff << " " << string << '\n';
        }

        void mark(std::string string) {
            mark(string.c_str());
        }

        ~DebugTimer() {
            if (chars) {
                mark(chars);
            }
            else {
                mark(string.c_str());
            }
        }

    private:
        char const* const chars;
        std::string string;
        struct timeval start;
    };

}

#define ZXING_TIME(string) DebugTimer __timer__ (string)
#define ZXING_TIME_MARK(string) __timer__.mark(string)

#endif

#endif // ZXING_DEBUG

#ifndef ZXING_TIME
#define ZXING_TIME(string) (void)0
#endif
#ifndef ZXING_TIME_MARK
#define ZXING_TIME_MARK(string) (void)0
#endif

#endif