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abc/src/base/io/ioReadBlif.c

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/**CFile****************************************************************
FileName [ioReadBlif.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Command processing package.]
Synopsis [Procedures to read BLIF files.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ioReadBlif.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "io.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
typedef struct Io_ReadBlif_t_ Io_ReadBlif_t; // all reading info
struct Io_ReadBlif_t_
{
// general info about file
char * pFileName; // the name of the file
Extra_FileReader_t* pReader; // the input file reader
// current processing info
Abc_Ntk_t * pNtk; // the primary network
Abc_Ntk_t * pNtkExdc; // the exdc network
int fParsingExdc; // this flag is on, when we are parsing EXDC network
int LineCur; // the line currently parsed
// temporary storage for tokens
Vec_Ptr_t * vNewTokens; // the temporary storage for the tokens
Vec_Str_t * vCubes; // the temporary storage for the tokens
// the error message
FILE * Output; // the output stream
char sError[1000]; // the error string generated during parsing
};
static Io_ReadBlif_t * Io_ReadBlifFile( char * pFileName );
static void Io_ReadBlifFree( Io_ReadBlif_t * p );
static void Io_ReadBlifPrintErrorMessage( Io_ReadBlif_t * p );
static Vec_Ptr_t * Io_ReadBlifGetTokens( Io_ReadBlif_t * p );
static Abc_Ntk_t * Io_ReadBlifNetwork( Io_ReadBlif_t * p );
static int Io_ReadBlifNetworkInputs( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens );
static int Io_ReadBlifNetworkOutputs( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens );
static int Io_ReadBlifNetworkLatch( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens );
static int Io_ReadBlifNetworkNames( Io_ReadBlif_t * p, Vec_Ptr_t ** pvTokens );
static int Io_ReadBlifNetworkInputArrival( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens );
static int Io_ReadBlifNetworkDefaultInputArrival( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Read the network from BLIF file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadBlif( char * pFileName, int fCheck )
{
Io_ReadBlif_t * p;
Abc_Ntk_t * pNtk, * pNtkExdc;
// start the file
p = Io_ReadBlifFile( pFileName );
if ( p == NULL )
return NULL;
// read the network
pNtk = Io_ReadBlifNetwork( p );
if ( pNtk == NULL )
{
Io_ReadBlifFree( p );
return NULL;
}
Abc_NtkTimeFinalize( pNtk );
// read the EXDC network
if ( p->fParsingExdc )
{
pNtkExdc = Io_ReadBlifNetwork( p );
if ( pNtkExdc == NULL )
{
Abc_NtkDelete( pNtk );
Io_ReadBlifFree( p );
return NULL;
}
pNtk->pExdc = pNtkExdc;
}
Io_ReadBlifFree( p );
// make sure that everything is okay with the network structure
if ( fCheck && !Abc_NtkCheck( pNtk ) )
{
printf( "Io_ReadBlif: The network check has failed.\n" );
Abc_NtkDelete( pNtk );
return NULL;
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Starts the reading data structure.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Io_ReadBlif_t * Io_ReadBlifFile( char * pFileName )
{
Extra_FileReader_t * pReader;
Io_ReadBlif_t * p;
// start the reader
pReader = Extra_FileReaderAlloc( pFileName, "#", "\n", " \t\r" );
if ( pReader == NULL )
return NULL;
// start the reading data structure
p = ALLOC( Io_ReadBlif_t, 1 );
memset( p, 0, sizeof(Io_ReadBlif_t) );
p->pFileName = pFileName;
p->pReader = pReader;
p->Output = stdout;
p->vNewTokens = Vec_PtrAlloc( 100 );
p->vCubes = Vec_StrAlloc( 100 );
return p;
}
/**Function*************************************************************
Synopsis [Frees the data structure.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_ReadBlifFree( Io_ReadBlif_t * p )
{
Extra_FileReaderFree( p->pReader );
Vec_PtrFree( p->vNewTokens );
Vec_StrFree( p->vCubes );
free( p );
}
/**Function*************************************************************
Synopsis [Prints the error message including the file name and line number.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_ReadBlifPrintErrorMessage( Io_ReadBlif_t * p )
{
if ( p->LineCur == 0 ) // the line number is not given
fprintf( p->Output, "%s: %s\n", p->pFileName, p->sError );
else // print the error message with the line number
fprintf( p->Output, "%s (line %d): %s\n", p->pFileName, p->LineCur, p->sError );
}
/**Function*************************************************************
Synopsis [Gets the tokens taking into account the line breaks.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Io_ReadBlifGetTokens( Io_ReadBlif_t * p )
{
Vec_Ptr_t * vTokens;
char * pLastToken;
int i;
// get rid of the old tokens
if ( p->vNewTokens->nSize > 0 )
{
for ( i = 0; i < p->vNewTokens->nSize; i++ )
free( p->vNewTokens->pArray[i] );
p->vNewTokens->nSize = 0;
}
// get the new tokens
vTokens = Extra_FileReaderGetTokens(p->pReader);
if ( vTokens == NULL )
return vTokens;
// check if there is a transfer to another line
pLastToken = vTokens->pArray[vTokens->nSize - 1];
if ( pLastToken[ strlen(pLastToken)-1 ] != '\\' )
return vTokens;
// remove the slash
pLastToken[ strlen(pLastToken)-1 ] = 0;
if ( pLastToken[0] == 0 )
vTokens->nSize--;
// load them into the new array
for ( i = 0; i < vTokens->nSize; i++ )
Vec_PtrPush( p->vNewTokens, util_strsav(vTokens->pArray[i]) );
// load as long as there is the line break
while ( 1 )
{
// get the new tokens
vTokens = Extra_FileReaderGetTokens(p->pReader);
if ( vTokens->nSize == 0 )
return p->vNewTokens;
// check if there is a transfer to another line
pLastToken = vTokens->pArray[vTokens->nSize - 1];
if ( pLastToken[ strlen(pLastToken)-1 ] == '\\' )
{
// remove the slash
pLastToken[ strlen(pLastToken)-1 ] = 0;
if ( pLastToken[0] == 0 )
vTokens->nSize--;
// load them into the new array
for ( i = 0; i < vTokens->nSize; i++ )
Vec_PtrPush( p->vNewTokens, util_strsav(vTokens->pArray[i]) );
continue;
}
// otherwise, load them and break
for ( i = 0; i < vTokens->nSize; i++ )
Vec_PtrPush( p->vNewTokens, util_strsav(vTokens->pArray[i]) );
break;
}
return p->vNewTokens;
}
/**Function*************************************************************
Synopsis [Reads the BLIF file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadBlifNetwork( Io_ReadBlif_t * p )
{
ProgressBar * pProgress;
Vec_Ptr_t * vTokens;
char * pModelName;
int iLine, fTokensReady, fStatus;
// read the model name
if ( !p->fParsingExdc )
{
// read the model name
vTokens = Io_ReadBlifGetTokens(p);
if ( vTokens == NULL || strcmp( vTokens->pArray[0], ".model" ) )
{
p->LineCur = 0;
sprintf( p->sError, "Wrong input file format." );
Io_ReadBlifPrintErrorMessage( p );
return NULL;
}
pModelName = vTokens->pArray[1];
// allocate the empty network
p->pNtk = Abc_NtkAlloc( ABC_NTK_NETLIST );
p->pNtk->pName = util_strsav( pModelName );
p->pNtk->pSpec = util_strsav( p->pFileName );
}
else
p->pNtk = Abc_NtkAlloc( ABC_NTK_NETLIST );
// read the inputs/outputs
pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p->pReader) );
fTokensReady = fStatus = 0;
for ( iLine = 0; fTokensReady || (vTokens = Io_ReadBlifGetTokens(p)); iLine++ )
{
if ( iLine % 1000 == 0 )
Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p->pReader), NULL );
// consider different line types
fTokensReady = 0;
if ( !strcmp( vTokens->pArray[0], ".names" ) )
{ fStatus = Io_ReadBlifNetworkNames( p, &vTokens ); fTokensReady = 1; }
else if ( !strcmp( vTokens->pArray[0], ".latch" ) )
fStatus = Io_ReadBlifNetworkLatch( p, vTokens );
else if ( !strcmp( vTokens->pArray[0], ".inputs" ) )
fStatus = Io_ReadBlifNetworkInputs( p, vTokens );
else if ( !strcmp( vTokens->pArray[0], ".outputs" ) )
fStatus = Io_ReadBlifNetworkOutputs( p, vTokens );
else if ( !strcmp( vTokens->pArray[0], ".input_arrival" ) )
fStatus = Io_ReadBlifNetworkInputArrival( p, vTokens );
else if ( !strcmp( vTokens->pArray[0], ".default_input_arrival" ) )
fStatus = Io_ReadBlifNetworkDefaultInputArrival( p, vTokens );
else if ( !strcmp( vTokens->pArray[0], ".exdc" ) )
{ p->fParsingExdc = 1; break; }
else if ( !strcmp( vTokens->pArray[0], ".end" ) )
break;
else
printf( "%s (line %d): Skipping directive \"%s\".\n", p->pFileName,
Extra_FileReaderGetLineNumber(p->pReader, 0), vTokens->pArray[0] );
if ( vTokens == NULL ) // some files do not have ".end" in the end
break;
if ( fStatus == 1 )
return NULL;
}
Extra_ProgressBarStop( pProgress );
Io_ReadSetNonDrivenNets( p->pNtk );
return p->pNtk;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkInputs( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens )
{
Abc_Ntk_t * pNtk = p->pNtk;
Abc_Obj_t * pNet;
int i;
for ( i = 1; i < vTokens->nSize; i++ )
{
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[i] );
if ( Abc_ObjIsPi(pNet) )
printf( "Warning: PI net \"%s\" appears twice in the list.\n", vTokens->pArray[i] );
else
Abc_NtkMarkNetPi( pNet );
}
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkOutputs( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens )
{
Abc_Ntk_t * pNtk = p->pNtk;
Abc_Obj_t * pNet;
int i;
for ( i = 1; i < vTokens->nSize; i++ )
{
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[i] );
if ( Abc_ObjIsPo(pNet) )
printf( "Warning: PO net \"%s\" appears twice in the list.\n", vTokens->pArray[i] );
else
Abc_NtkMarkNetPo( pNet );
}
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkLatch( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens )
{
Abc_Ntk_t * pNtk = p->pNtk;
Abc_Obj_t * pNet, * pLatch;
int ResetValue;
if ( vTokens->nSize < 3 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The .latch line does not have enough tokens." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// create a new node and add it to the network
pLatch = Abc_NtkCreateLatch( pNtk );
// create the LO (PI)
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[2] );
Abc_ObjAddFanin( pNet, pLatch );
Abc_ObjSetSubtype( pNet, ABC_OBJ_SUBTYPE_LO );
// save the LI (PO)
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[1] );
Abc_ObjAddFanin( pLatch, pNet );
Abc_ObjSetSubtype( pNet, ABC_OBJ_SUBTYPE_LI );
// get the latch reset value
if ( vTokens->nSize == 3 )
ResetValue = 2;
else
{
ResetValue = atoi(vTokens->pArray[3]);
if ( ResetValue != 0 && ResetValue != 1 && ResetValue != 2 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The .latch line has an unknown reset value (%s).", vTokens->pArray[3] );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
}
Abc_ObjSetData( pLatch, (void *)ResetValue );
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkNames( Io_ReadBlif_t * p, Vec_Ptr_t ** pvTokens )
{
Vec_Ptr_t * vTokens = *pvTokens;
Abc_Ntk_t * pNtk = p->pNtk;
Abc_Obj_t * pNet, * pNode;
char * pToken, Char;
int i, nFanins;
// create a new node and add it to the network
pNode = Abc_NtkCreateNode( pNtk );
if ( vTokens->nSize < 2 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The .names line has less than two tokens." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// go through the nets
for ( i = 1; i < vTokens->nSize - 1; i++ )
{
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[i] );
Abc_ObjAddFanin( pNode, pNet );
}
pNet = Abc_NtkFindOrCreateNet( pNtk, vTokens->pArray[vTokens->nSize - 1] );
Abc_ObjAddFanin( pNet, pNode );
// derive the functionality of the node
p->vCubes->nSize = 0;
nFanins = vTokens->nSize - 2;
if ( nFanins == 0 )
while ( vTokens = Io_ReadBlifGetTokens(p) )
{
pToken = vTokens->pArray[0];
if ( pToken[0] == '.' )
break;
// read the cube
if ( vTokens->nSize != 1 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The number of tokens in the constant cube is wrong." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// create the cube
Char = ((char *)vTokens->pArray[0])[0];
Vec_StrPush( p->vCubes, ' ' );
Vec_StrPush( p->vCubes, Char );
Vec_StrPush( p->vCubes, '\n' );
}
else
while ( vTokens = Io_ReadBlifGetTokens(p) )
{
pToken = vTokens->pArray[0];
if ( pToken[0] == '.' )
break;
// read the cube
if ( vTokens->nSize != 2 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The number of tokens in the cube is wrong." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// create the cube
for ( i = 0; i < nFanins; i++ )
Vec_StrPush( p->vCubes, ((char *)vTokens->pArray[0])[i] );
// check the char
Char = ((char *)vTokens->pArray[1])[0];
if ( Char != '0' && Char != '1' )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "The output character in the constant cube is wrong." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
Vec_StrPush( p->vCubes, ' ' );
Vec_StrPush( p->vCubes, Char );
Vec_StrPush( p->vCubes, '\n' );
}
// if there is nothing there
if ( p->vCubes->nSize == 0 )
{
// create an empty cube
Vec_StrPush( p->vCubes, ' ' );
Vec_StrPush( p->vCubes, '0' );
Vec_StrPush( p->vCubes, '\n' );
}
Vec_StrPush( p->vCubes, 0 );
// set the pointer to the functionality of the node
Abc_ObjSetData( pNode, Abc_SopRegister(pNtk->pManFunc, p->vCubes->pArray) );
// return the last array of tokens
*pvTokens = vTokens;
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkInputArrival( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens )
{
Abc_Obj_t * pNet;
char * pFoo1, * pFoo2;
double TimeRise, TimeFall;
// make sure this is indeed the .inputs line
assert( strncmp( vTokens->pArray[0], ".input_arrival", 14 ) == 0 );
if ( vTokens->nSize != 4 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "Wrong number of arguments on .input_arrival line." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
pNet = Abc_NtkFindNet( p->pNtk, vTokens->pArray[1] );
if ( pNet == NULL )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "Cannot find object corresponding to %s on .input_arrival line.", vTokens->pArray[1] );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
TimeRise = strtod( vTokens->pArray[2], &pFoo1 );
TimeFall = strtod( vTokens->pArray[3], &pFoo2 );
if ( *pFoo1 != '\0' || *pFoo2 != '\0' )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "Bad value (%s %s) for rise or fall time on .input_arrival line.", vTokens->pArray[2], vTokens->pArray[3] );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// set the arrival time
Abc_NtkTimeSetArrival( p->pNtk, pNet->Id, (float)TimeRise, (float)TimeFall );
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_ReadBlifNetworkDefaultInputArrival( Io_ReadBlif_t * p, Vec_Ptr_t * vTokens )
{
char * pFoo1, * pFoo2;
double TimeRise, TimeFall;
// make sure this is indeed the .inputs line
assert( strncmp( vTokens->pArray[0], ".default_input_arrival", 23 ) == 0 );
if ( vTokens->nSize != 3 )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "Wrong number of arguments on .default_input_arrival line." );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
TimeRise = strtod( vTokens->pArray[1], &pFoo1 );
TimeFall = strtod( vTokens->pArray[2], &pFoo2 );
if ( *pFoo1 != '\0' || *pFoo2 != '\0' )
{
p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
sprintf( p->sError, "Bad value (%s %s) for rise or fall time on .default_input_arrival line.", vTokens->pArray[1], vTokens->pArray[2] );
Io_ReadBlifPrintErrorMessage( p );
return 1;
}
// set the arrival time
Abc_NtkTimeSetDefaultArrival( p->pNtk, (float)TimeRise, (float)TimeFall );
return 0;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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