CVC3  2.4.1
Public Member Functions | Protected Attributes | Friends
CLitPoolElement Class Reference

#include <xchaff_base.h>

List of all members.

Public Member Functions

 CLitPoolElement (void)
 CLitPoolElement (int val)
int & val (void)
int s_var (void)
int var_index (void)
bool var_sign (void)
void set (int s_var)
void set (int v, int s)
int direction (void)
bool is_ht (void)
void unset_ht (void)
void set_ht (int dir)
bool is_literal (void)
void set_clause_index (int cl_idx)
int get_clause_index (void)
int find_clause_idx (void)
void dump (ostream &os=cout)

Protected Attributes

int _val

Friends

ostream & operator<< (ostream &os, CLitPoolElement &l)

Detailed Description

Class**********************************************************************

Synopsis [Definition of a literal]

Description [A literal is a variable with phase. Two thing determing a lteral: it's "sign", and the variable index. One bit is used to mark it's sign. 0->positive, 1->negative.

For every clause with literal count larger than 1, there are two special literals which are designated ht_literal (stands for head/tail literal to imitate SATO) It is specially marked with 2 bits: 00->not ht; dir = 1; or dir = -1; 10 is not valid. Each literal is represented by a 32 bit integer, with one bit representing it's phase and 2 bits indicate h/t property.

All the literals are collected in a storage space called literal pool. An element in a literal pool can be a literal or special spacing element to indicate the termination of a clause. The spacing element has negative value of the clause index.]

SeeAlso [CDatabase, CClause]

Definition at line 81 of file xchaff_base.h.


Constructor & Destructor Documentation

CLitPoolElement::CLitPoolElement ( void  )
inline

Definition at line 87 of file xchaff_base.h.

CLitPoolElement::CLitPoolElement ( int  val)
inline

Definition at line 90 of file xchaff_base.h.


Member Function Documentation

int& CLitPoolElement::val ( void  )
inline
int CLitPoolElement::s_var ( void  )
inline
int CLitPoolElement::var_index ( void  )
inline
bool CLitPoolElement::var_sign ( void  )
inline
void CLitPoolElement::set ( int  s_var)
inline

Definition at line 104 of file xchaff_base.h.

void CLitPoolElement::set ( int  v,
int  s 
)
inline

Definition at line 107 of file xchaff_base.h.

int CLitPoolElement::direction ( void  )
inline
bool CLitPoolElement::is_ht ( void  )
inline

Definition at line 114 of file xchaff_base.h.

Referenced by CDatabase::compact_lit_pool().

void CLitPoolElement::unset_ht ( void  )
inline
void CLitPoolElement::set_ht ( int  dir)
inline

Definition at line 120 of file xchaff_base.h.

Referenced by CSolver::add_clause().

bool CLitPoolElement::is_literal ( void  )
inline

Definition at line 125 of file xchaff_base.h.

Referenced by find_clause_idx().

void CLitPoolElement::set_clause_index ( int  cl_idx)
inline

Definition at line 128 of file xchaff_base.h.

int CLitPoolElement::get_clause_index ( void  )
inline

Definition at line 131 of file xchaff_base.h.

Referenced by find_clause_idx().

int CLitPoolElement::find_clause_idx ( void  )
inline

Definition at line 135 of file xchaff_base.h.

References get_clause_index(), and is_literal().

void CLitPoolElement::dump ( ostream &  os = cout)
inline

Definition at line 141 of file xchaff_base.h.


Friends And Related Function Documentation

ostream& operator<< ( ostream &  os,
CLitPoolElement l 
)
friend

Definition at line 145 of file xchaff_base.h.


Member Data Documentation

int CLitPoolElement::_val
protected

Definition at line 84 of file xchaff_base.h.


The documentation for this class was generated from the following file: