clock.cpp

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2011 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */
 
#include "lass_common.h"
#include "clock.h"
 
namespace lass
{
namespace util
{
 
Clock::Clock(TTime iStartTime):
    frequency_(impl::ClockImpl::frequency())
{
    resolution_ = num::NumTraits<TTime>::one / static_cast<TTime>(frequency_);
    reset(iStartTime);
}
 
 
 
void Clock::reset(TTime iStartTime)
{
    startTick_ = impl::ClockImpl::tick();
    startTime_ = iStartTime;
}
 
 
 
const std::string Clock::humanize(const TTime& time)
{
    std::ostringstream buffer;
    buffer.copyfmt(std::cout);
 
    if (time < 60)
    {
        buffer.setf(std::ios_base::showpoint);
        buffer.setf(static_cast<std::ios_base::fmtflags>(0), std::ios_base::floatfield);
        buffer.precision(3);
        if (time < 1e-9)
        {
            buffer << (1e12 * time) << "ps";
        }
        else if (time < 1e-6)
        {
            buffer << (1e9 * time) << "ns";
        }
        else if (time < 1e-3)
        {
            buffer << (1e6 * time) << "us";
        }
        else if (time < 1.0)
        {
            buffer << (1e3 * time) << "ms";
        }
        else
        {
            buffer << time << "s";
        }
    }
    else
    {
        struct Helper
        {
            static void write(std::ostringstream& stream, TTime time, const std::string& bigUnit, TTime SmallInBig, const std::string& smallUnit)
            {
                const TTime sign = num::sign(time);
                const TTime absTime = num::abs(time);
                const TTime bigHand = num::floor(absTime);
                const TTime smallHand = num::floor(SmallInBig * (absTime - bigHand));
                stream << static_cast<int>(sign * bigHand) << bigUnit << std::setw(2) << std::setfill('0') << static_cast<int>(smallHand) << smallUnit;
            }
        };
 
        if (time < 3600)
        {
            Helper::write(buffer, time / 60, "m", 60, "s");
        }
        else if (time < 86400)
        {
            Helper::write(buffer, time / 3600, "h", 60, "m");
        }
        else
        {
            Helper::write(buffer, time / 86400, "d", 24, "h");
        }
    }
 
    return buffer.str();
}
 
 
 
}
 
}
 
// EOF