185 lines
4.5 KiB
C++
185 lines
4.5 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2005,2006 INRIA
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* Copyright (c) 2007 Emmanuelle Laprise
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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* TimeStep support by Emmanuelle Laprise <emmanuelle.laprise@bluekazoo.ca>
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*/
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#include "nstime.h"
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#include "abort.h"
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#include "global-value.h"
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#include "enum.h"
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#include "string.h"
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#include "object.h"
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#include "config.h"
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#include <math.h>
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#include <sstream>
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namespace ns3 {
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Time::Time (const std::string& s)
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{
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std::string::size_type n = s.find_first_not_of ("+-0123456789.");
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if (n != std::string::npos)
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{ // Found non-numeric
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std::istringstream iss;
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iss.str (s.substr (0, n));
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double r;
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iss >> r;
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std::string trailer = s.substr (n, std::string::npos);
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if (trailer == std::string ("s"))
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{
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*this = Time::FromDouble (r, Time::S);
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return;
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}
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if (trailer == std::string ("ms"))
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{
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*this = Time::FromDouble (r, Time::MS);
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return;
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}
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if (trailer == std::string ("us"))
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{
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*this = Time::FromDouble (r, Time::US);
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return;
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}
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if (trailer == std::string ("ns"))
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{
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*this = Time::FromDouble (r, Time::NS);
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return;
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}
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if (trailer == std::string ("ps"))
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{
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*this = Time::FromDouble (r, Time::PS);
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return;
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}
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if (trailer == std::string ("fs"))
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{
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*this = Time::FromDouble (r, Time::FS);
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return;
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}
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NS_ABORT_MSG ("Can't Parse Time " << s);
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}
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// else
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// they didn't provide units, assume seconds
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std::istringstream iss;
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iss.str (s);
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double v;
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iss >> v;
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*this = Time::FromDouble (v, Time::S);
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}
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struct Time::Resolution
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Time::GetNsResolution (void)
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{
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struct Resolution resolution;
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SetResolution (Time::NS, &resolution);
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return resolution;
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}
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void
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Time::SetResolution (enum Unit resolution)
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{
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SetResolution (resolution, PeekResolution ());
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}
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void
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Time::SetResolution (enum Unit unit, struct Resolution *resolution)
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{
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int8_t power [LAST] = { 15, 12, 9, 6, 3, 0};
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for (int i = 0; i < Time::LAST; i++)
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{
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int shift = power[i] - power[(int)unit];
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uint64_t factor = (uint64_t) pow (10, fabs (shift));
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struct Information *info = &resolution->info[i];
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info->factor = factor;
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if (shift == 0)
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{
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info->timeFrom = int64x64_t (1);
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info->timeTo = int64x64_t (1);
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info->toMul = true;
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info->fromMul = true;
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}
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else if (shift > 0)
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{
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info->timeFrom = int64x64_t (factor);
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info->timeTo = int64x64_t::Invert (factor);
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info->toMul = false;
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info->fromMul = true;
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}
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else
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{
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NS_ASSERT (shift < 0);
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info->timeFrom = int64x64_t::Invert (factor);
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info->timeTo = int64x64_t (factor);
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info->toMul = true;
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info->fromMul = false;
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}
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}
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resolution->unit = unit;
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}
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enum Time::Unit
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Time::GetResolution (void)
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{
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return PeekResolution ()->unit;
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}
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std::ostream&
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operator<< (std::ostream& os, const Time & time)
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{
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std::string unit;
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switch (Time::GetResolution ())
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{
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case Time::S:
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unit = "s";
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break;
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case Time::MS:
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unit = "ms";
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break;
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case Time::US:
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unit = "us";
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break;
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case Time::NS:
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unit = "ns";
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break;
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case Time::PS:
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unit = "ps";
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break;
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case Time::FS:
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unit = "fs";
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break;
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case Time::LAST:
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NS_ABORT_MSG ("can't be reached");
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unit = "unreachable";
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break;
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}
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int64x64_t v = time;
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os << v << unit;
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return os;
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}
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std::istream& operator>> (std::istream& is, Time & time)
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{
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std::string value;
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is >> value;
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time = Time (value);
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return is;
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}
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ATTRIBUTE_VALUE_IMPLEMENT (Time);
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ATTRIBUTE_CHECKER_IMPLEMENT (Time);
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} // namespace ns3
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