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/********************* */
/*! \file rational_gmp_imp.cpp
** \verbatim
** Original author: taking
** Major contributors: mdeters
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief A multi-precision rational constant.
**
** A multi-precision rational constant.
**/
#include "cvc4autoconfig.h"
#include "util/rational.h"
#include <string>
#ifndef CVC4_GMP_IMP
# error "This source should only ever be built if CVC4_GMP_IMP is on !"
#endif /* CVC4_GMP_IMP */
using namespace std;
using namespace CVC4;
/* Computes a rational given a decimal string. The rational
* version of <code>xxx.yyy</code> is <code>xxxyyy/(10^3)</code>.
*/
Rational Rational::fromDecimal(const string& dec) {
// Find the decimal point, if there is one
string::size_type i( dec.find(".") );
if( i != string::npos ) {
/* Erase the decimal point, so we have just the numerator. */
Integer numerator( string(dec).erase(i,1) );
/* Compute the denominator: 10 raise to the number of decimal places */
int decPlaces = dec.size() - (i + 1);
Integer denominator( Integer(10).pow(decPlaces) );
return Rational( numerator, denominator );
} else {
/* No decimal point, assume it's just an integer. */
return Rational( dec );
}
}
std::ostream& CVC4::operator<<(std::ostream& os, const Rational& q){
return os << q.toString();
}
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