From 7ccb25bfe929787dc0a4dafc0dead5951cdf0246 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Tue, 7 May 2019 07:27:31 +0800
Subject: Modifying 'write_truth' to dump truth table in hex.

---
 src/base/io/io.c               | 14 +++++++++++---
 src/misc/extra/extra.h         |  1 +
 src/misc/extra/extraUtilFile.c | 18 ++++++++++++++++++
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/base/io/io.c b/src/base/io/io.c
index 5ba7f32c..ab23be3b 100644
--- a/src/base/io/io.c
+++ b/src/base/io/io.c
@@ -2968,14 +2968,18 @@ int IoCommandWriteTruth( Abc_Frame_t * pAbc, int argc, char **argv )
     char * pFileName;
     FILE * pFile;
     unsigned * pTruth;
+    int fHex = 1;
     int fReverse = 0;
     int c;
 
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "rh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "xrh" ) ) != EOF )
     {
         switch ( c )
         {
+            case 'x':
+                fHex ^= 1;
+                break;
             case 'r':
                 fReverse ^= 1;
                 break;
@@ -3031,14 +3035,18 @@ int IoCommandWriteTruth( Abc_Frame_t * pAbc, int argc, char **argv )
         printf( "Cannot open file \"%s\" for writing.\n", pFileName );
         return 0;
     }
-    Extra_PrintBinary( pFile, pTruth, 1<<Abc_ObjFaninNum(pNode) );
+    if ( fHex )
+        Extra_PrintHex2( pFile, pTruth, Abc_ObjFaninNum(pNode) );
+    else
+        Extra_PrintBinary( pFile, pTruth, 1<<Abc_ObjFaninNum(pNode) );
     fclose( pFile );
     Vec_IntFree( vTruth );
     return 0;
 
 usage:
-    fprintf( pAbc->Err, "usage: write_truth [-rh] <file>\n" );
+    fprintf( pAbc->Err, "usage: write_truth [-xrh] <file>\n" );
     fprintf( pAbc->Err, "\t         writes truth table into a file\n" );
+    fprintf( pAbc->Err, "\t-x     : toggles between bin and hex representation [default = %s]\n", fHex?  "hex":"bin" );
     fprintf( pAbc->Err, "\t-r     : toggle reversing bits in the truth table [default = %s]\n", fReverse? "yes":"no" );
     fprintf( pAbc->Err, "\t-h     : print the help massage\n" );
     fprintf( pAbc->Err, "\tfile   : the name of the file to write\n" );
diff --git a/src/misc/extra/extra.h b/src/misc/extra/extra.h
index e8afebd8..2f38692d 100644
--- a/src/misc/extra/extra.h
+++ b/src/misc/extra/extra.h
@@ -125,6 +125,7 @@ extern int          Extra_ReadHexadecimal( unsigned Sign[], char * pString, int
 extern void         Extra_PrintHexadecimal( FILE * pFile, unsigned Sign[], int nVars );
 extern void         Extra_PrintHexadecimalString( char * pString, unsigned Sign[], int nVars );
 extern void         Extra_PrintHex( FILE * pFile, unsigned * pTruth, int nVars );
+extern void         Extra_PrintHex2( FILE * pFile, unsigned * pTruth, int nVars );
 extern void         Extra_PrintHexReverse( FILE * pFile, unsigned * pTruth, int nVars );
 extern void         Extra_PrintSymbols( FILE * pFile, char Char, int nTimes, int fPrintNewLine );
 
diff --git a/src/misc/extra/extraUtilFile.c b/src/misc/extra/extraUtilFile.c
index 0af78ac4..eb1b7dce 100644
--- a/src/misc/extra/extraUtilFile.c
+++ b/src/misc/extra/extraUtilFile.c
@@ -656,6 +656,24 @@ void Extra_PrintHex( FILE * pFile, unsigned * pTruth, int nVars )
     }
 //    fprintf( pFile, "\n" );
 }
+void Extra_PrintHex2( FILE * pFile, unsigned * pTruth, int nVars )
+{
+    int nMints, nDigits, Digit, k;
+
+    // write the number into the file
+    //fprintf( pFile, "0x" );
+    nMints  = (1 << nVars);
+    nDigits = nMints / 4 + ((nMints % 4) > 0);
+    for ( k = nDigits - 1; k >= 0; k-- )
+    {
+        Digit = ((pTruth[k/8] >> (k * 4)) & 15);
+        if ( Digit < 10 )
+            fprintf( pFile, "%d", Digit );
+        else
+            fprintf( pFile, "%c", 'A' + Digit-10 );
+    }
+//    fprintf( pFile, "\n" );
+}
 void Extra_PrintHexReverse( FILE * pFile, unsigned * pTruth, int nVars )
 {
     int nMints, nDigits, Digit, k;
-- 
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