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authorAlan Mishchenko <alanmi@berkeley.edu>2007-09-30 08:01:00 -0700
committerAlan Mishchenko <alanmi@berkeley.edu>2007-09-30 08:01:00 -0700
commite54d9691616b9a0326e2fdb3156bb4eeb8abfcd7 (patch)
treede3ffe87c3e17950351e3b7d97fa18318bd5ea9a /src/misc/extra/extraUtilBitMatrix.c
parent7d7e60f2dc84393cd4c5db22d2eaf7b1fb1a79b2 (diff)
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-/**CFile****************************************************************
-
- FileName [extraUtilBitMatrix.c]
-
- PackageName [extra]
-
- Synopsis [Various reusable software utilities.]
-
- Author [Alan Mishchenko]
-
- Affiliation [UC Berkeley]
-
- Date [Ver. 1.0. Started - September 1, 2003.]
-
- Revision [$Id: extraUtilBitMatrix.c,v 1.0 2003/09/01 00:00:00 alanmi Exp $]
-
-***********************************************************************/
-
-#include "extra.h"
-
-/*---------------------------------------------------------------------------*/
-/* Constant declarations */
-/*---------------------------------------------------------------------------*/
-
-/*---------------------------------------------------------------------------*/
-/* Stucture declarations */
-/*---------------------------------------------------------------------------*/
-
-struct Extra_BitMat_t_
-{
- unsigned ** ppData; // bit data
- int nSize; // the number of bits in one dimension
- int nWords; // the number of words in one dimension
- int nBitShift; // the number of bits to shift to get words
- unsigned uMask; // the mask to get the number of bits in the word
- int nLookups; // the number of lookups
- int nInserts; // the number of inserts
- int nDeletes; // the number of deletions
-};
-
-/*---------------------------------------------------------------------------*/
-/* Type declarations */
-/*---------------------------------------------------------------------------*/
-
-/*---------------------------------------------------------------------------*/
-/* Variable declarations */
-/*---------------------------------------------------------------------------*/
-
-/*---------------------------------------------------------------------------*/
-/* Macro declarations */
-/*---------------------------------------------------------------------------*/
-
-
-/**AutomaticStart*************************************************************/
-
-/*---------------------------------------------------------------------------*/
-/* Static function prototypes */
-/*---------------------------------------------------------------------------*/
-
-/**AutomaticEnd***************************************************************/
-
-
-/*---------------------------------------------------------------------------*/
-/* Definition of exported functions */
-/*---------------------------------------------------------------------------*/
-
-/**Function*************************************************************
-
- Synopsis [Starts the bit matrix.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Extra_BitMat_t * Extra_BitMatrixStart( int nSize )
-{
- Extra_BitMat_t * p;
- int i;
- p = ALLOC( Extra_BitMat_t, 1 );
- memset( p, 0, sizeof(Extra_BitMat_t) );
- p->nSize = nSize;
- p->nBitShift = (sizeof(unsigned) == 4) ? 5: 6;
- p->uMask = (sizeof(unsigned) == 4) ? 31: 63;
- p->nWords = nSize / (8 * sizeof(unsigned)) + ((nSize % (8 * sizeof(unsigned))) > 0);
- p->ppData = ALLOC( unsigned *, nSize );
- p->ppData[0] = ALLOC( unsigned, nSize * p->nWords );
- memset( p->ppData[0], 0, sizeof(unsigned) * nSize * p->nWords );
- for ( i = 1; i < nSize; i++ )
- p->ppData[i] = p->ppData[i-1] + p->nWords;
- return p;
-}
-
-/**Function*************************************************************
-
- Synopsis [Stops the bit matrix.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixClean( Extra_BitMat_t * p )
-{
- memset( p->ppData[0], 0, sizeof(unsigned) * p->nSize * p->nWords );
-}
-
-/**Function*************************************************************
-
- Synopsis [Stops the bit matrix.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixStop( Extra_BitMat_t * p )
-{
- FREE( p->ppData[0] );
- FREE( p->ppData );
- FREE( p );
-}
-
-/**Function*************************************************************
-
- Synopsis [Prints the bit-matrix.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixPrint( Extra_BitMat_t * pMat )
-{
- int i, k, nVars;
- printf( "\n" );
- nVars = Extra_BitMatrixReadSize( pMat );
- for ( i = 0; i < nVars; i++ )
- {
- for ( k = 0; k <= i; k++ )
- printf( " " );
- for ( k = i+1; k < nVars; k++ )
- if ( Extra_BitMatrixLookup1( pMat, i, k ) )
- printf( "1" );
- else
- printf( "." );
- printf( "\n" );
- }
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Reads the matrix size.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixReadSize( Extra_BitMat_t * p )
-{
- return p->nSize;
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixInsert1( Extra_BitMat_t * p, int i, int k )
-{
- p->nInserts++;
- if ( i < k )
- p->ppData[i][k>>p->nBitShift] |= (1<<(k & p->uMask));
- else
- p->ppData[k][i>>p->nBitShift] |= (1<<(i & p->uMask));
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixLookup1( Extra_BitMat_t * p, int i, int k )
-{
- p->nLookups++;
- if ( i < k )
- return ((p->ppData[i][k>>p->nBitShift] & (1<<(k & p->uMask))) > 0);
- else
- return ((p->ppData[k][i>>p->nBitShift] & (1<<(i & p->uMask))) > 0);
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixDelete1( Extra_BitMat_t * p, int i, int k )
-{
- p->nDeletes++;
- if ( i < k )
- p->ppData[i][k>>p->nBitShift] &= ~(1<<(k & p->uMask));
- else
- p->ppData[k][i>>p->nBitShift] &= ~(1<<(i & p->uMask));
-}
-
-
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixInsert2( Extra_BitMat_t * p, int i, int k )
-{
- p->nInserts++;
- if ( i > k )
- p->ppData[i][k>>p->nBitShift] |= (1<<(k & p->uMask));
- else
- p->ppData[k][i>>p->nBitShift] |= (1<<(i & p->uMask));
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixLookup2( Extra_BitMat_t * p, int i, int k )
-{
- p->nLookups++;
- if ( i > k )
- return ((p->ppData[i][k>>p->nBitShift] & (1<<(k & p->uMask))) > 0);
- else
- return ((p->ppData[k][i>>p->nBitShift] & (1<<(i & p->uMask))) > 0);
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixDelete2( Extra_BitMat_t * p, int i, int k )
-{
- p->nDeletes++;
- if ( i > k )
- p->ppData[i][k>>p->nBitShift] &= ~(1<<(k & p->uMask));
- else
- p->ppData[k][i>>p->nBitShift] &= ~(1<<(i & p->uMask));
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixOr( Extra_BitMat_t * p, int i, unsigned * pInfo )
-{
- int w;
- for ( w = 0; w < p->nWords; w++ )
- p->ppData[i][w] |= pInfo[w];
-}
-
-/**Function*************************************************************
-
- Synopsis [Inserts the element into the upper part.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Extra_BitMatrixOrTwo( Extra_BitMat_t * p, int i, int j )
-{
- int w;
- for ( w = 0; w < p->nWords; w++ )
- p->ppData[i][w] = p->ppData[j][w] = (p->ppData[i][w] | p->ppData[j][w]);
-}
-
-/**Function*************************************************************
-
- Synopsis [Counts the number of 1's in the upper rectangle.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixCountOnesUpper( Extra_BitMat_t * p )
-{
- int i, k, nTotal = 0;
- for ( i = 0; i < p->nSize; i++ )
- for ( k = i + 1; k < p->nSize; k++ )
- nTotal += ( (p->ppData[i][k>>5] & (1 << (k&31))) > 0 );
- return nTotal;
-}
-
-/**Function*************************************************************
-
- Synopsis [Returns 1 if the matrices have no entries in common.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixIsDisjoint( Extra_BitMat_t * p1, Extra_BitMat_t * p2 )
-{
- int i, w;
- assert( p1->nSize == p2->nSize );
- for ( i = 0; i < p1->nSize; i++ )
- for ( w = 0; w < p1->nWords; w++ )
- if ( p1->ppData[i][w] & p2->ppData[i][w] )
- return 0;
- return 1;
-}
-
-/**Function*************************************************************
-
- Synopsis [Returns 1 if the matrix is a set of cliques.]
-
- Description [For example pairwise symmetry info should satisfy this property.]
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Extra_BitMatrixIsClique( Extra_BitMat_t * pMat )
-{
- int v, u, i;
- for ( v = 0; v < pMat->nSize; v++ )
- for ( u = v+1; u < pMat->nSize; u++ )
- {
- if ( !Extra_BitMatrixLookup1( pMat, v, u ) )
- continue;
- // v and u are symmetric
- for ( i = 0; i < pMat->nSize; i++ )
- {
- if ( i == v || i == u )
- continue;
- // i is neither v nor u
- // the symmetry status of i is the same w.r.t. to v and u
- if ( Extra_BitMatrixLookup1( pMat, i, v ) != Extra_BitMatrixLookup1( pMat, i, u ) )
- return 0;
- }
- }
- return 1;
-}
-
-
-////////////////////////////////////////////////////////////////////////
-/// END OF FILE ///
-////////////////////////////////////////////////////////////////////////
-
-