/**CFile*********************************************************************** FileName [cuddZddCount.c] PackageName [cudd] Synopsis [Procedures to count the number of minterms of a ZDD.] Description [External procedures included in this module: Internal procedures included in this module: Static procedures included in this module: ] SeeAlso [] Author [Hyong-Kyoon Shin, In-Ho Moon] Copyright [Copyright (c) 1995-2004, Regents of the University of Colorado All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of the University of Colorado nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.] ******************************************************************************/ #include "misc/util/util_hack.h" #include "cuddInt.h" ABC_NAMESPACE_IMPL_START /*---------------------------------------------------------------------------*/ /* Constant declarations */ /*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/ /* Stucture declarations */ /*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/ /* Type declarations */ /*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/ /* Variable declarations */ /*---------------------------------------------------------------------------*/ #ifndef lint static char rcsid[] DD_UNUSED = "$Id: cuddZddCount.c,v 1.14 2004/08/13 18:04:53 fabio Exp $"; #endif /*---------------------------------------------------------------------------*/ /* Macro declarations */ /*---------------------------------------------------------------------------*/ /**AutomaticStart*************************************************************/ /*---------------------------------------------------------------------------*/ /* Static function prototypes */ /*---------------------------------------------------------------------------*/ static int cuddZddCountStep (DdNode *P, st__table *table, DdNode *base, DdNode *empty); static double cuddZddCountDoubleStep (DdNode *P, st__table *table, DdNode *base, DdNode *empty); static enum st__retval st__zdd_countfree (char *key, char *value, char *arg); static enum st__retval st__zdd_count_dbl_free (char *key, char *value, char *arg); /**AutomaticEnd***************************************************************/ /*---------------------------------------------------------------------------*/ /* Definition of exported functions */ /*---------------------------------------------------------------------------*/ /**Function******************************************************************** Synopsis [Counts the number of minterms in a ZDD.] Description [Returns an integer representing the number of minterms in a ZDD.] SideEffects [None] SeeAlso [Cudd_zddCountDouble] ******************************************************************************/ int Cudd_zddCount( DdManager * zdd, DdNode * P) { st__table *table; int res; DdNode *base, *empty; base = DD_ONE(zdd); empty = DD_ZERO(zdd); table = st__init_table( st__ptrcmp, st__ptrhash); if (table == NULL) return(CUDD_OUT_OF_MEM); res = cuddZddCountStep(P, table, base, empty); if (res == CUDD_OUT_OF_MEM) { zdd->errorCode = CUDD_MEMORY_OUT; } st__foreach(table, st__zdd_countfree, NIL(char)); st__free_table(table); return(res); } /* end of Cudd_zddCount */ /**Function******************************************************************** Synopsis [Counts the number of minterms of a ZDD.] Description [Counts the number of minterms of a ZDD. The result is returned as a double. If the procedure runs out of memory, it returns (double) CUDD_OUT_OF_MEM. This procedure is used in Cudd_zddCountMinterm.] SideEffects [None] SeeAlso [Cudd_zddCountMinterm Cudd_zddCount] ******************************************************************************/ double Cudd_zddCountDouble( DdManager * zdd, DdNode * P) { st__table *table; double res; DdNode *base, *empty; base = DD_ONE(zdd); empty = DD_ZERO(zdd); table = st__init_table( st__ptrcmp, st__ptrhash); if (table == NULL) return((double)CUDD_OUT_OF_MEM); res = cuddZddCountDoubleStep(P, table, base, empty); if (res == (double)CUDD_OUT_OF_MEM) { zdd->errorCode = CUDD_MEMORY_OUT; } st__foreach(table, st__zdd_count_dbl_free, NIL(char)); st__free_table(table); return(res); } /* end of Cudd_zddCountDouble */ /*---------------------------------------------------------------------------*/ /* Definition of internal functions */ /*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/ /* Definition of static functions */ /*---------------------------------------------------------------------------*/ /**Function******************************************************************** Synopsis [Performs the recursive step of Cudd_zddCount.] Description [] SideEffects [None] SeeAlso [] ******************************************************************************/ static int cuddZddCountStep( DdNode * P, st__table * table, DdNode * base, DdNode * empty) { int res; int *dummy; if (P == empty) return(0); if (P == base) return(1); /* Check cache. */ if ( st__lookup(table, (const char *)P, (char **)&dummy)) { res = *dummy; return(res); } res = cuddZddCountStep(cuddE(P), table, base, empty) + cuddZddCountStep(cuddT(P), table, base, empty); dummy = ABC_ALLOC(int, 1); if (dummy == NULL) { return(CUDD_OUT_OF_MEM); } *dummy = res; if ( st__insert(table, (char *)P, (char *)dummy) == st__OUT_OF_MEM) { ABC_FREE(dummy); return(CUDD_OUT_OF_MEM); } return(res); } /* end of cuddZddCountStep */ /**Function******************************************************************** Synopsis [Performs the recursive step of Cudd_zddCountDouble.] Description [] SideEffects [None] SeeAlso [] ******************************************************************************/ static double cuddZddCountDoubleStep( DdNode * P, st__table * table, DdNode * base, DdNode * empty) { double res; double *dummy; if (P == empty) return((double)0.0); if (P == base) return((double)1.0); /* Check cache */ if ( st__lookup(table, (const char *)P, (char **)&dummy)) { res = *dummy; return(res); } res = cuddZddCountDoubleStep(cuddE(P), table, base, empty) + cuddZddCountDoubleStep(cuddT(P), table, base, empty); dummy = ABC_ALLOC(double, 1); if (dummy == NULL) { return((double)CUDD_OUT_OF_MEM); } *dummy = res; if ( st__insert(table, (char *)P, (char *)dummy) == st__OUT_OF_MEM) { ABC_FREE(dummy); return((double)CUDD_OUT_OF_MEM); } return(res); } /* end of cuddZddCountDoubleStep */ /**Function******************************************************************** Synopsis [Frees the memory associated with the computed table of Cudd_zddCount.] Description [] SideEffects [None] SeeAlso [] ******************************************************************************/ static enum st__retval st__zdd_countfree( char * key, char * value, char * arg) { int *d; d = (int *)value; ABC_FREE(d); return( st__CONTINUE); } /* end of st__zdd_countfree */ /**Function******************************************************************** Synopsis [Frees the memory associated with the computed table of Cudd_zddCountDouble.] Description [] SideEffects [None] SeeAlso [] ******************************************************************************/ static enum st__retval st__zdd_count_dbl_free( char * key, char * value, char * arg) { double *d; d = (double *)value; ABC_FREE(d); return( st__CONTINUE); } /* end of st__zdd_count_dbl_free */ ABC_NAMESPACE_IMPL_END