initially checkin

1 files changed, 72 insertions, 0 deletions

diff --git a/mpi/mpi-cmp.c b/mpi/mpi-cmp.c
new file mode 100644
index 00000000..83e85ceb
--- /dev/null
+++ b/mpi/mpi-cmp.c
@@ -0,0 +1,72 @@
+/* mpi-cmp.c  -  MPI functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *
+ * This file is part of G10.
+ *
+ * G10 is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * G10 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi-internal.h"
+
+int
+mpi_cmp_ui( MPI u, unsigned long v )
+{
+    mpi_limb_t limb = v;
+
+    if( !u->nlimbs && !limb )
+	return 0;
+    if( u->sign )
+	return -1;
+    if( u->nlimbs > 1 )
+	return 1;
+
+    if( u->d[0] == limb )
+	return 0;
+    else if( u->d[0] > limb )
+	return 1;
+    else
+	return -1;
+}
+
+int
+mpi_cmp( MPI u, MPI v )
+{
+    mpi_size_t usize = u->nlimbs;
+    mpi_size_t vsize = v->nlimbs;
+    int cmp;
+
+    /* FIXME: are the numbers always normalized? */
+    if( !u->sign && v->sign )
+	return 1;
+    else if( u->sign && !v->sign )
+	return -1;
+    else if( usize != vsize && !u->sign && !v->sign )
+	return usize - vsize;
+    else if( usize != vsize && u->sign && v->sign )
+	return vsize + usize;
+    else if( !usize )
+	return 0;
+    else if( !(cmp=mpihelp_cmp( u->d, v->d, usize )) )
+	return 0;
+    else if( (cmp < 0?1:0) == (u->sign?1:0))
+	return 1;
+    else
+	return -1;
+}
+
+