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/**CFile****************************************************************
FileName [ioReadEqn.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Command processing package.]
Synopsis [Procedures to read equation format files.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ioReadEqn.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "io.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static Abc_Ntk_t * Io_ReadEqnNetwork( Extra_FileReader_t * p );
static void Io_ReadEqnStrCompact( char * pStr );
static int Io_ReadEqnStrFind( Vec_Ptr_t * vTokens, char * pName );
static void Io_ReadEqnStrCutAt( char * pStr, char * pStop, int fUniqueOnly, Vec_Ptr_t * vTokens );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Reads the network from a BENCH file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadEqn( char * pFileName, int fCheck )
{
Extra_FileReader_t * p;
Abc_Ntk_t * pNtk;
// start the file
p = Extra_FileReaderAlloc( pFileName, "#", ";", "=" );
if ( p == NULL )
return NULL;
// read the network
pNtk = Io_ReadEqnNetwork( p );
Extra_FileReaderFree( p );
if ( pNtk == NULL )
return NULL;
// make sure that everything is okay with the network structure
if ( fCheck && !Abc_NtkCheckRead( pNtk ) )
{
printf( "Io_ReadEqn: The network check has failed.\n" );
Abc_NtkDelete( pNtk );
return NULL;
}
return pNtk;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadEqnNetwork( Extra_FileReader_t * p )
{
ProgressBar * pProgress;
Vec_Ptr_t * vTokens;
Vec_Ptr_t * vCubes, * vLits, * vVars;
Abc_Ntk_t * pNtk;
Abc_Obj_t * pNode;
char * pCubesCopy, * pSopCube, * pVarName;
int iLine, iNum, i, k;
// allocate the empty network
pNtk = Abc_NtkStartRead( Extra_FileReaderGetFileName(p) );
// go through the lines of the file
vCubes = Vec_PtrAlloc( 100 );
vVars = Vec_PtrAlloc( 100 );
vLits = Vec_PtrAlloc( 100 );
pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p) );
for ( iLine = 0; vTokens = Extra_FileReaderGetTokens(p); iLine++ )
{
Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p), NULL );
// check if the first token contains anything
Io_ReadEqnStrCompact( vTokens->pArray[0] );
if ( strlen(vTokens->pArray[0]) == 0 )
break;
// if the number of tokens is different from two, error
if ( vTokens->nSize != 2 )
{
printf( "%s: Wrong input file format.\n", Extra_FileReaderGetFileName(p) );
Abc_NtkDelete( pNtk );
return NULL;
}
// get the type of the line
if ( strncmp( vTokens->pArray[0], "INORDER", 7 ) == 0 )
{
Io_ReadEqnStrCutAt( vTokens->pArray[1], " \n\r\t", 0, vVars );
Vec_PtrForEachEntry( vVars, pVarName, i )
Io_ReadCreatePi( pNtk, pVarName );
}
else if ( strncmp( vTokens->pArray[0], "OUTORDER", 8 ) == 0 )
{
Io_ReadEqnStrCutAt( vTokens->pArray[1], " \n\r\t", 0, vVars );
Vec_PtrForEachEntry( vVars, pVarName, i )
Io_ReadCreatePo( pNtk, pVarName );
}
else
{
// remove spaces
pCubesCopy = vTokens->pArray[1];
Io_ReadEqnStrCompact( pCubesCopy );
// consider the case of the constant node
if ( (pCubesCopy[0] == '0' || pCubesCopy[0] == '1') && pCubesCopy[1] == 0 )
{
pNode = Io_ReadCreateNode( pNtk, vTokens->pArray[0], NULL, 0 );
if ( pCubesCopy[0] == '0' )
pNode->pData = Abc_SopCreateConst0( pNtk->pManFunc );
else
pNode->pData = Abc_SopCreateConst1( pNtk->pManFunc );
continue;
}
// determine unique variables
pCubesCopy = Extra_UtilStrsav( pCubesCopy );
// find the names of the fanins of this node
Io_ReadEqnStrCutAt( pCubesCopy, "!*+", 1, vVars );
// create the node
pNode = Io_ReadCreateNode( pNtk, vTokens->pArray[0], (char **)vVars->pArray, vVars->nSize );
// split the string into cubes
Io_ReadEqnStrCutAt( vTokens->pArray[1], "+", 0, vCubes );
// start the sop
pNode->pData = Abc_SopStart( pNtk->pManFunc, vCubes->nSize, vVars->nSize );
// read the cubes
i = 0;
Abc_SopForEachCube( pNode->pData, vVars->nSize, pSopCube )
{
// split this cube into lits
Io_ReadEqnStrCutAt( vCubes->pArray[i], "*", 0, vLits );
// read the literals
Vec_PtrForEachEntry( vLits, pVarName, k )
{
iNum = Io_ReadEqnStrFind( vVars, pVarName + (pVarName[0] == '!') );
assert( iNum >= 0 );
pSopCube[iNum] = '1' - (pVarName[0] == '!');
}
i++;
}
assert( i == vCubes->nSize );
// remove the cubes
free( pCubesCopy );
}
}
Extra_ProgressBarStop( pProgress );
Vec_PtrFree( vCubes );
Vec_PtrFree( vLits );
Vec_PtrFree( vVars );
Abc_NtkFinalizeRead( pNtk );
return pNtk;
}
/**Function*************************************************************
Synopsis [Compacts the string by throwing away space-like chars.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_ReadEqnStrCompact( char * pStr )
{
char * pCur, * pNew;
for ( pNew = pCur = pStr; *pCur; pCur++ )
if ( !(*pCur == ' ' || *pCur == '\n' || *pCur == '\r' || *pCur == '\t') )
*pNew++ = *pCur;
*pNew = 0;
}
/**Function*************************************************************
Synopsis [Determines unique variables in the string.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadEqnStrFind( Vec_Ptr_t * vTokens, char * pName )
{
char * pToken;
int i;
Vec_PtrForEachEntry( vTokens, pToken, i )
if ( strcmp( pToken, pName ) == 0 )
return i;
return -1;
}
/**Function*************************************************************
Synopsis [Cuts the string into pieces using stop chars.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_ReadEqnStrCutAt( char * pStr, char * pStop, int fUniqueOnly, Vec_Ptr_t * vTokens )
{
char * pToken;
Vec_PtrClear( vTokens );
for ( pToken = strtok( pStr, pStop ); pToken; pToken = strtok( NULL, pStop ) )
if ( !fUniqueOnly || Io_ReadEqnStrFind( vTokens, pToken ) == -1 )
Vec_PtrPush( vTokens, pToken );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
