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/*
* Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <boost/lexical_cast.hpp>
#include <cmath>
#include <limits>
#include <string>
#include "typed_value.h"
#define DBL_TOLERANCE 0.001
TypedValue::TypedValue ()
: _type (Empty)
, _b (false)
, _i (0)
, _d (0)
{
}
TypedValue::TypedValue (bool value)
: _type (Bool)
, _b (value)
, _i (0)
, _d (0)
{
}
TypedValue::TypedValue (int value)
: _type (Int)
, _b (false)
, _i (value)
, _d (0)
{
}
TypedValue::TypedValue (double value)
: _type (Double)
, _b (false)
, _i (0)
, _d (value)
{
}
TypedValue::TypedValue (std::string value)
: _type (String)
, _b (false)
, _i (0)
, _d (0)
, _s (value)
{
}
TypedValue::operator bool () const
{
switch (_type) {
case Bool:
return _b;
case Int:
return _i != 0;
case Double:
return _d != 0;
case String:
return _s == "true";
default:
return false;
}
}
TypedValue::operator int () const
{
switch (_type) {
case Int:
return _i;
case Bool:
return _b ? 1 : 0;
case Double:
return static_cast<int> (_d);
case String:
try {
return boost::lexical_cast<int> (_s);
} catch (const boost::bad_lexical_cast&) {
return 0;
}
default:
return 0;
}
}
TypedValue::operator double () const
{
switch (_type) {
case Double:
return _d;
case Bool:
return _b ? 1.f : 0;
case Int:
return static_cast<double> (_i);
case String:
try {
return boost::lexical_cast<double> (_s);
} catch (const boost::bad_lexical_cast&) {
return 0;
}
default:
return 0;
}
}
TypedValue::operator std::string () const
{
switch (_type) {
case String:
return _s;
case Bool:
return _b ? "true" : "false";
case Int:
return boost::lexical_cast<std::string> (_i);
case Double:
return boost::lexical_cast<std::string> (_d);
default:
return "";
}
}
bool
TypedValue::operator== (const TypedValue& other) const
{
if (_type != other._type) {
/* make an exception when comparing doubles and ints
* for example browser json implementations will send
* 1 instead of 1.0 removing any type hint
*/
if ((_type == Int) && (other._type == Double)) {
return fabs (static_cast<double> (_i) - other._d) < DBL_TOLERANCE;
} else if ((_type == Double) && (other._type == Int)) {
return fabs (_d - static_cast<double> (other._i)) < DBL_TOLERANCE;
}
return false;
}
switch (_type) {
case Bool:
return _b == other._b;
case Int:
return _i == other._i;
case Double: {
double inf = std::numeric_limits<double>::infinity ();
return ((_d == inf) && (other._d == inf)) || ((_d == -inf) && (other._d == -inf)) || (fabs (_d - other._d) < DBL_TOLERANCE);
}
case String:
return _s == other._s;
default:
return false;
}
}
bool
TypedValue::operator!= (const TypedValue& other) const
{
return !(*this == other);
}
std::string
TypedValue::debug_str () const
{
char s[256];
sprintf (s, "type = %d; b = %d; i = %d; d = %f; s = \"%s\"",
_type, _b, _i, _d, _s.c_str ());
return s;
}
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