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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 "ioAbc.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// 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 * vVars;
Abc_Ntk_t * pNtk;
Abc_Obj_t * pNode;
char * pNodeName, * pFormula, * pFormulaCopy, * pVarName;
int iLine, i;
// allocate the empty network
pNtk = Abc_NtkAlloc( ABC_NTK_NETLIST, ABC_FUNC_AIG, 1 );
// set the specs
pNtk->pName = Extra_FileNameGeneric(Extra_FileReaderGetFileName(p));
pNtk->pSpec = Extra_UtilStrsav(Extra_FileReaderGetFileName(p));
// go through the lines of the file
vVars = Vec_PtrAlloc( 100 );
pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p) );
for ( iLine = 0; (vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p)); iLine++ )
{
Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p), NULL );
// check if the first token contains anything
Io_ReadEqnStrCompact( (char *)vTokens->pArray[0] );
if ( strlen((char *)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( (char *)vTokens->pArray[0], "INORDER", 7 ) == 0 )
{
Io_ReadEqnStrCutAt( (char *)vTokens->pArray[1], " \n\r\t", 0, vVars );
Vec_PtrForEachEntry( char *, vVars, pVarName, i )
Io_ReadCreatePi( pNtk, pVarName );
}
else if ( strncmp( (char *)vTokens->pArray[0], "OUTORDER", 8 ) == 0 )
{
Io_ReadEqnStrCutAt( (char *)vTokens->pArray[1], " \n\r\t", 0, vVars );
Vec_PtrForEachEntry( char *, vVars, pVarName, i )
Io_ReadCreatePo( pNtk, pVarName );
}
else
{
extern Hop_Obj_t * Parse_FormulaParserEqn( FILE * pOutput, char * pFormInit, Vec_Ptr_t * vVarNames, Hop_Man_t * pMan );
// get hold of the node name and its formula
pNodeName = (char *)vTokens->pArray[0];
pFormula = (char *)vTokens->pArray[1];
// compact the formula
Io_ReadEqnStrCompact( pFormula );
// consider the case of the constant node
if ( pFormula[1] == 0 && (pFormula[0] == '0' || pFormula[0] == '1') )
{
pFormulaCopy = NULL;
Vec_PtrClear( vVars );
}
else
{
// make a copy of formula for names
pFormulaCopy = Extra_UtilStrsav( pFormula );
// find the names of the fanins of this node
Io_ReadEqnStrCutAt( pFormulaCopy, "!*+()", 1, vVars );
}
// create the node
pNode = Io_ReadCreateNode( pNtk, pNodeName, (char **)Vec_PtrArray(vVars), Vec_PtrSize(vVars) );
// derive the function
pNode->pData = Parse_FormulaParserEqn( stdout, pFormula, vVars, (Hop_Man_t *)pNtk->pManFunc );
// remove the cubes
ABC_FREE( pFormulaCopy );
}
}
Extra_ProgressBarStop( pProgress );
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( char *, 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 ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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