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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "ixion/global.hpp"
#include "ixion/address.hpp"
#include "ixion/matrix.hpp"
#include "ixion/cell.hpp"
#include "ixion/exceptions.hpp"
#include "ixion/formula_result.hpp"
#include <iostream>
#include <cstdlib>
#include <sstream>
#include <fstream>
#include <chrono>
using namespace std;
namespace ixion {
double get_current_time()
{
unsigned long usec_since_epoch =
std::chrono::duration_cast<std::chrono::microseconds>(
std::chrono::system_clock::now().time_since_epoch()).count();
return usec_since_epoch / 1000000.0;
}
double to_double(std::string_view s)
{
const char* p = s.data();
std::size_t n = s.size();
if (!n)
return 0.0;
// First, use the standard C API.
const char* p_last_check = p + n;
char* p_last;
double val = strtod(p, &p_last);
if (p_last == p_last_check)
return val;
// If that fails, do the manual conversion, which may introduce rounding
// errors. Revise this to reduce the amount of rounding error.
bool dot = false;
double frac = 1.0;
double sign = 1.0;
for (size_t i = 0; i < n; ++i, ++p)
{
if (i == 0)
{
if (*p == '+')
// Skip this.
continue;
if (*p == '-')
{
sign = -1.0;
continue;
}
}
if (*p == '.')
{
if (dot)
// Second dot is not allowed.
break;
dot = true;
continue;
}
if (*p < '0' || '9' < *p)
// not a digit. End the parse.
break;
int digit = *p - '0';
if (dot)
{
frac *= 0.1;
val += digit * frac;
}
else
{
val *= 10.0;
val += digit;
}
}
return sign*val;
}
bool to_bool(std::string_view s)
{
return s == "true";
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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