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/*********************                                                        */
/*! \file proof_utils.cpp
** \verbatim
** Original author: Liana Hadarean
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2014  New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/

#include "proof/proof_utils.h"
#include "theory/theory.h"

namespace CVC4 {
namespace utils {

void collectAtoms(TNode node, CVC4::NodeSet& seen) {
  if (seen.find(node) != seen.end())
    return;
  if (theory::Theory::theoryOf(node) != theory::THEORY_BOOL || node.isVar()) {
      seen.insert(node);
      return;
  }
  
  for (unsigned i = 0; i < node.getNumChildren(); ++i) {
    collectAtoms(node[i], seen);
  }
}

std::string toLFSCKind(Kind kind) {
  switch(kind) {
    // core kinds
  case kind::OR : return "or";
  case kind::AND: return "and";
  case kind::XOR: return "xor";
  case kind::EQUAL: return "=";
  case kind::IFF: return "iff";
  case kind::IMPLIES: return "impl";
  case kind::NOT: return "not";

    // bit-vector kinds
  case kind::BITVECTOR_AND :
    return "bvand"; 
  case kind::BITVECTOR_OR :
    return "bvor"; 
  case kind::BITVECTOR_XOR :
    return "bvxor"; 
  case kind::BITVECTOR_NAND :
    return "bvnand"; 
  case kind::BITVECTOR_NOR :
    return "bvnor"; 
  case kind::BITVECTOR_XNOR :
    return "bvxnor"; 
  case kind::BITVECTOR_COMP :
    return "bvcomp"; 
  case kind::BITVECTOR_MULT :
    return "bvmul";
  case kind::BITVECTOR_PLUS :
    return "bvadd"; 
  case kind::BITVECTOR_SUB :
    return "bvsub";
  case kind::BITVECTOR_UDIV :
  case kind::BITVECTOR_UDIV_TOTAL :
    return "bvudiv";
  case kind::BITVECTOR_UREM :
  case kind::BITVECTOR_UREM_TOTAL :
    return "bvurem"; 
  case kind::BITVECTOR_SDIV :
    return "bvsdiv"; 
  case kind::BITVECTOR_SREM :
    return "bvsrem";
  case kind::BITVECTOR_SMOD :
    return "bvsmod"; 
  case kind::BITVECTOR_SHL :
    return "bvshl"; 
  case kind::BITVECTOR_LSHR :
    return "bvlshr";
  case kind::BITVECTOR_ASHR :
    return "bvashr";
  case kind::BITVECTOR_CONCAT :
    return "concat"; 
  case kind::BITVECTOR_NEG :
    return "bvneg"; 
  case kind::BITVECTOR_NOT :
    return "bvnot"; 
  case kind::BITVECTOR_ROTATE_LEFT :
    return "rotate_left"; 
  case kind::BITVECTOR_ROTATE_RIGHT :
    return "rotate_right";
  case kind::BITVECTOR_ULT :
    return "bvult"; 
  case kind::BITVECTOR_ULE :
    return "bvule"; 
  case kind::BITVECTOR_UGT :
    return "bvugt";
  case kind::BITVECTOR_UGE :
    return "bvuge";
  case kind::BITVECTOR_SLT :
    return "bvslt"; 
  case kind::BITVECTOR_SLE :
    return "bvsle"; 
  case kind::BITVECTOR_SGT :
    return "bvsgt"; 
  case kind::BITVECTOR_SGE :
    return "bvsge"; 
  case kind::BITVECTOR_EXTRACT :
    return "extract"; 
  case kind::BITVECTOR_REPEAT :
    return "repeat"; 
  case kind::BITVECTOR_ZERO_EXTEND :
    return "zero_extend";
  case kind::BITVECTOR_SIGN_EXTEND :
    return "sign_extend";
  default:
    Unreachable();
  }
}

} /* namespace CVC4::utils */
} /* namespace CVC4 */
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