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/**CFile****************************************************************
FileName [ioReadBaf.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Command processing package.]
Synopsis [Procedures to read AIG in the binary format.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ioReadBaf.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "ioAbc.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Reads the AIG in the binary format.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadBaf( char * pFileName, int fCheck )
{
ProgressBar * pProgress;
FILE * pFile;
Vec_Ptr_t * vNodes;
Abc_Obj_t * pObj, * pNode0, * pNode1;
Abc_Ntk_t * pNtkNew;
int nInputs, nOutputs, nLatches, nAnds, nFileSize, Num, i;
char * pContents, * pName, * pCur;
unsigned * pBufferNode;
// read the file into the buffer
nFileSize = Extra_FileSize( pFileName );
pFile = fopen( pFileName, "rb" );
pContents = ABC_ALLOC( char, nFileSize );
fread( pContents, nFileSize, 1, pFile );
fclose( pFile );
// skip the comments (comment lines begin with '#' and end with '\n')
for ( pCur = pContents; *pCur == '#'; )
while ( *pCur++ != '\n' );
// read the name
pName = pCur; while ( *pCur++ );
// read the number of inputs
nInputs = atoi( pCur ); while ( *pCur++ );
// read the number of outputs
nOutputs = atoi( pCur ); while ( *pCur++ );
// read the number of latches
nLatches = atoi( pCur ); while ( *pCur++ );
// read the number of nodes
nAnds = atoi( pCur ); while ( *pCur++ );
// allocate the empty AIG
pNtkNew = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
pNtkNew->pName = Extra_UtilStrsav( pName );
pNtkNew->pSpec = Extra_UtilStrsav( pFileName );
// prepare the array of nodes
vNodes = Vec_PtrAlloc( 1 + nInputs + nLatches + nAnds );
Vec_PtrPush( vNodes, Abc_AigConst1(pNtkNew) );
// create the PIs
for ( i = 0; i < nInputs; i++ )
{
pObj = Abc_NtkCreatePi(pNtkNew);
Abc_ObjAssignName( pObj, pCur, NULL ); while ( *pCur++ );
Vec_PtrPush( vNodes, pObj );
}
// create the POs
for ( i = 0; i < nOutputs; i++ )
{
pObj = Abc_NtkCreatePo(pNtkNew);
Abc_ObjAssignName( pObj, pCur, NULL ); while ( *pCur++ );
}
// create the latches
for ( i = 0; i < nLatches; i++ )
{
pObj = Abc_NtkCreateLatch(pNtkNew);
Abc_ObjAssignName( pObj, pCur, NULL ); while ( *pCur++ );
pNode0 = Abc_NtkCreateBi(pNtkNew);
Abc_ObjAssignName( pNode0, pCur, NULL ); while ( *pCur++ );
pNode1 = Abc_NtkCreateBo(pNtkNew);
Abc_ObjAssignName( pNode1, pCur, NULL ); while ( *pCur++ );
Vec_PtrPush( vNodes, pNode1 );
Abc_ObjAddFanin( pObj, pNode0 );
Abc_ObjAddFanin( pNode1, pObj );
}
// get the pointer to the beginning of the node array
pBufferNode = (unsigned *)(pContents + (nFileSize - (2 * nAnds + nOutputs + nLatches) * sizeof(int)) );
// make sure we are at the place where the nodes begin
if ( pBufferNode != (unsigned *)pCur )
{
ABC_FREE( pContents );
Vec_PtrFree( vNodes );
Abc_NtkDelete( pNtkNew );
printf( "Warning: Internal reader error.\n" );
return NULL;
}
// create the AND gates
pProgress = Extra_ProgressBarStart( stdout, nAnds );
for ( i = 0; i < nAnds; i++ )
{
Extra_ProgressBarUpdate( pProgress, i, NULL );
pNode0 = Abc_ObjNotCond( Vec_PtrEntry(vNodes, pBufferNode[2*i+0] >> 1), pBufferNode[2*i+0] & 1 );
pNode1 = Abc_ObjNotCond( Vec_PtrEntry(vNodes, pBufferNode[2*i+1] >> 1), pBufferNode[2*i+1] & 1 );
Vec_PtrPush( vNodes, Abc_AigAnd(pNtkNew->pManFunc, pNode0, pNode1) );
}
Extra_ProgressBarStop( pProgress );
// read the POs
Abc_NtkForEachCo( pNtkNew, pObj, i )
{
Num = pBufferNode[2*nAnds+i];
if ( Abc_ObjFanoutNum(pObj) > 0 && Abc_ObjIsLatch(Abc_ObjFanout0(pObj)) )
{
Abc_ObjSetData( Abc_ObjFanout0(pObj), (void *)(ABC_PTRINT_T)(Num & 3) );
Num >>= 2;
}
pNode0 = Abc_ObjNotCond( Vec_PtrEntry(vNodes, Num >> 1), Num & 1 );
Abc_ObjAddFanin( pObj, pNode0 );
}
ABC_FREE( pContents );
Vec_PtrFree( vNodes );
// remove the extra nodes
// Abc_AigCleanup( pNtkNew->pManFunc );
// check the result
if ( fCheck && !Abc_NtkCheckRead( pNtkNew ) )
{
printf( "Io_ReadBaf: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
