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/*************************************************************************
** Length.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2013 Martin Gieseking <martin.gieseking@uos.de> **
** **
** 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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <sstream>
#include "InputReader.h"
#include "Length.h"
#define UNIT(c1,c2) ((c1 << 8)|c2)
using namespace std;
void Length::set (const string &len) {
switch (len.length()) {
case 0:
_pt = 0;
break;
case 1:
if (isdigit(len[0]))
_pt = len[0] - '0';
else
throw UnitException("invalid length: "+len);
break;
default:
istringstream iss(len);
StreamInputReader ir(iss);
double val;
if (!ir.parseDouble(val))
throw UnitException("invalid length: "+len);
string unit = ir.getWord();
set(val, unit);
}
}
void Length::set (double val, Unit unit) {
switch (unit) {
case PT: _pt = val; break;
case BP: _pt = val*72.27/72; break;
case IN: _pt = val*72.27; break;
case CM: _pt = val/2.54*72.27; break;
case MM: _pt = val/25.4*72.27; break;
case PC: _pt = val/12*72.27; break;
}
}
void Length::set (double val, string unitstr) {
if (unitstr.empty())
unitstr = "pt";
else if (unitstr.length() != 2)
throw UnitException("invalid length unit: "+unitstr);
Unit unit;
switch (UNIT(unitstr[0], unitstr[1])) {
case UNIT('p','t'): unit = PT; break;
case UNIT('b','p'): unit = BP; break;
case UNIT('i','n'): unit = IN; break;
case UNIT('c','m'): unit = CM; break;
case UNIT('m','m'): unit = MM; break;
case UNIT('p','c'): unit = PC; break;
default:
throw UnitException("invalid length unit: "+unitstr);
}
set(val, unit);
}
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