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/*
* bitvector.h
*
* Created on: Mar 31, 2010
* Author: dejan
*/
#ifndef __CVC4__BITVECTOR_H_
#define __CVC4__BITVECTOR_H_
#include <iostream>
#include "util/Assert.h"
#include "util/gmp_util.h"
#include "util/integer.h"
using namespace std;
namespace CVC4 {
class BitVector {
private:
unsigned d_size;
Integer d_value;
BitVector(unsigned size, const Integer& val) : d_size(size), d_value(val) {}
public:
BitVector(unsigned size = 0)
: d_size(size), d_value(0) {}
BitVector(unsigned size, unsigned int z)
: d_size(size), d_value(z) {}
BitVector(unsigned size, unsigned long int z)
: d_size(size), d_value(z) {}
BitVector(unsigned size, const BitVector& q)
: d_size(size), d_value(q.d_value) {}
BitVector(const std::string& num, unsigned base = 2);
~BitVector() {}
BitVector& operator =(const BitVector& x) {
if(this == &x)
return *this;
d_value = x.d_value;
return *this;
}
bool operator ==(const BitVector& y) const {
if (d_size != y.d_size) return false;
return d_value == y.d_value;
}
bool operator !=(const BitVector& y) const {
if (d_size == y.d_size) return false;
return d_value != y.d_value;
}
BitVector operator +(const BitVector& y) const {
return BitVector(std::max(d_size, y.d_size), d_value + y.d_value);
}
BitVector operator -(const BitVector& y) const {
return *this + ~y + 1;
}
BitVector operator -() const {
return ~(*this) + 1;
}
BitVector operator *(const BitVector& y) const {
return BitVector(d_size, d_value * y.d_value);
}
BitVector operator ~() const {
return BitVector(d_size, d_value);
}
size_t hash() const {
return d_value.hash();
}
std::string toString(unsigned int base = 2) const {
std::string str = d_value.toString(base);
if( base == 2 && d_size > str.size() ) {
std::string zeroes;
for( unsigned int i=0; i < d_size - str.size(); ++i ) {
zeroes.append("0");
}
return zeroes + str;
} else {
return str;
}
}
unsigned getSize() const {
return d_size;
}
};
inline BitVector::BitVector(const std::string& num, unsigned base) {
AlwaysAssert( base == 2 || base == 16 );
if( base == 2 ) {
d_size = num.size();
// d_value = Integer(num,2);
/*
for( string::const_iterator it = num.begin(); it != num.end(); ++it ) {
if( *it != '0' || *it != '1' ) {
IllegalArgument(num, "BitVector argument is not a binary string.");
}
z = (Integer(2) * z) + (*it == '1');
d_value = mpz_class(z.get_mpz());
}
*/
} else if( base == 16 ) {
d_size = num.size() * 4;
// // Use a stream to decode the hex string
// stringstream ss;
// ss.setf(ios::hex, ios::basefield);
// ss << num;
// ss >> z;
// d_value = mpz_class(z);
// break;
} else {
Unreachable("Unsupported base in BitVector(std::string&, unsigned int).");
}
d_value = Integer(num,base);
}
/**
* Hash function for the BitVector constants.
*/
struct BitVectorHashStrategy {
static inline size_t hash(const BitVector& bv) {
return bv.hash();
}
};
/**
* The structure representing the extraction operation for bit-vectors. The
* operation map bit-vectors to bit-vector of size <code>high - low + 1</code>
* by taking the bits at indices <code>high ... low</code>
*/
struct BitVectorExtract {
/** The high bit of the range for this extract */
unsigned high;
/** The low bit of the range for this extract */
unsigned low;
BitVectorExtract(unsigned high, unsigned low)
: high(high), low(low) {}
bool operator == (const BitVectorExtract& extract) const {
return high == extract.high && low == extract.low;
}
};
/**
* Hash function for the BitVectorExtract objects.
*/
class BitVectorExtractHashStrategy {
public:
static size_t hash(const BitVectorExtract& extract) {
size_t hash = extract.low;
hash ^= extract.high + 0x9e3779b9 + (hash << 6) + (hash >> 2);
return hash;
}
};
struct BitVectorSize {
unsigned size;
BitVectorSize(unsigned size)
: size(size) {}
operator unsigned () const { return size; }
};
struct BitVectorRepeat {
unsigned repeatAmount;
BitVectorRepeat(unsigned repeatAmount)
: repeatAmount(repeatAmount) {}
operator unsigned () const { return repeatAmount; }
};
struct BitVectorZeroExtend {
unsigned zeroExtendAmount;
BitVectorZeroExtend(unsigned zeroExtendAmount)
: zeroExtendAmount(zeroExtendAmount) {}
operator unsigned () const { return zeroExtendAmount; }
};
struct BitVectorSignExtend {
unsigned signExtendAmount;
BitVectorSignExtend(unsigned signExtendAmount)
: signExtendAmount(signExtendAmount) {}
operator unsigned () const { return signExtendAmount; }
};
struct BitVectorRotateLeft {
unsigned rotateLeftAmount;
BitVectorRotateLeft(unsigned rotateLeftAmount)
: rotateLeftAmount(rotateLeftAmount) {}
operator unsigned () const { return rotateLeftAmount; }
};
struct BitVectorRotateRight {
unsigned rotateRightAmount;
BitVectorRotateRight(unsigned rotateRightAmount)
: rotateRightAmount(rotateRightAmount) {}
operator unsigned () const { return rotateRightAmount; }
};
template <typename T>
struct UnsignedHashStrategy {
static inline size_t hash(const T& x) {
return (size_t)x;
}
};
std::ostream& operator <<(std::ostream& os, const BitVector& bv);
std::ostream& operator <<(std::ostream& os, const BitVectorExtract& bv);
}
#endif /* __CVC4__BITVECTOR_H_ */
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