Add method to compute the number of digits of a HYPRE_BigInt

src/utilities/_hypre_utilities.h

@@ -1785,6 +1785,7 @@ void HYPRE_Finalize();
 
 /* hypre_printf.c */
 // #ifdef HYPRE_BIGINT
+HYPRE_Int hypre_ndigits( HYPRE_BigInt number );
 HYPRE_Int hypre_printf( const char *format , ... );
 HYPRE_Int hypre_fprintf( FILE *stream , const char *format, ... );
 HYPRE_Int hypre_sprintf( char *s , const char *format, ... );

src/utilities/hypre_printf.c

@@ -116,6 +116,20 @@ free_format( char *newformat )
    return 0;
 }
 
+HYPRE_Int
+hypre_ndigits( HYPRE_BigInt number )
+{
+   HYPRE_Int     ndigits = 0;
+
+   while(number)
+   {
+      number /= 10;
+      ndigits++;
+   }
+
+   return ndigits;
+}
+
 /* printf functions */
 
 HYPRE_Int