1 files changed, 119 insertions, 0 deletions
diff --git a/mozilla/security/nss/lib/freebl/mpi/utils/gcd.c b/mozilla/security/nss/lib/freebl/mpi/utils/gcd.c
new file mode 100644
index 0000000..a01306d
--- /dev/null
+++ b/mozilla/security/nss/lib/freebl/mpi/utils/gcd.c
@@ -0,0 +1,119 @@
+/*
+ *  gcd.c
+ *
+ *  Greatest common divisor
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael J. Fromberger.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+/* $Id: gcd.c,v 1.3 2004/04/27 23:04:37 gerv%gerv.net Exp $ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "mpi.h"
+
+char     *g_prog = NULL;
+
+void print_mp_int(mp_int *mp, FILE *ofp);
+
+int main(int argc, char *argv[]) 
+{
+  mp_int   a, b, x, y;
+  mp_err   res;
+  int      ext = 0;
+
+  g_prog = argv[0];
+
+  if(argc < 3) {
+    fprintf(stderr, "Usage: %s <a> <b>\n", g_prog);
+    return 1;
+  }
+
+  mp_init(&a); mp_read_radix(&a, argv[1], 10);
+  mp_init(&b); mp_read_radix(&b, argv[2], 10);
+
+  /* If we were called 'xgcd', compute x, y so that g = ax + by */
+  if(strcmp(g_prog, "xgcd") == 0) {
+    ext = 1;
+    mp_init(&x); mp_init(&y);
+  }
+
+  if(ext) {
+    if((res = mp_xgcd(&a, &b, &a, &x, &y)) != MP_OKAY) {
+      fprintf(stderr, "%s: error: %s\n", g_prog, mp_strerror(res));
+      mp_clear(&a); mp_clear(&b);
+      mp_clear(&x); mp_clear(&y);
+      return 1;
+    }
+  } else {
+    if((res = mp_gcd(&a, &b, &a)) != MP_OKAY) {
+      fprintf(stderr, "%s: error: %s\n", g_prog,
+	      mp_strerror(res));
+      mp_clear(&a); mp_clear(&b);
+      return 1;
+    }
+  }
+
+  print_mp_int(&a, stdout); 
+  if(ext) {
+    fputs("x = ", stdout); print_mp_int(&x, stdout); 
+    fputs("y = ", stdout); print_mp_int(&y, stdout); 
+  }
+
+  mp_clear(&a); mp_clear(&b);
+
+  if(ext) {
+    mp_clear(&x);
+    mp_clear(&y);
+  }
+
+  return 0;
+
+}
+
+void print_mp_int(mp_int *mp, FILE *ofp)
+{
+  char  *buf;
+  int    len;
+
+  len = mp_radix_size(mp, 10);
+  buf = calloc(len, sizeof(char));
+  mp_todecimal(mp, buf);
+  fprintf(ofp, "%s\n", buf);
+  free(buf);
+
+}