1 files changed, 69 insertions, 0 deletions
diff --git a/ext/bcmath/libbcmath/src/nearzero.c b/ext/bcmath/libbcmath/src/nearzero.c
new file mode 100644
index 0000000..ae16b65
--- /dev/null
+++ b/ext/bcmath/libbcmath/src/nearzero.c
@@ -0,0 +1,69 @@
+/* nearzero.c: bcmath library file. */
+/*
+    Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
+    Copyright (C) 2000 Philip A. Nelson
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.  (COPYING.LIB)
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to:
+
+      The Free Software Foundation, Inc.
+      59 Temple Place, Suite 330
+      Boston, MA 02111-1307 USA.
+
+    You may contact the author by:
+       e-mail:  philnelson@acm.org
+      us-mail:  Philip A. Nelson
+                Computer Science Department, 9062
+                Western Washington University
+                Bellingham, WA 98226-9062
+       
+*************************************************************************/
+
+#include <config.h>
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include "bcmath.h"
+#include "private.h"
+
+/* In some places we need to check if the number NUM is almost zero.
+   Specifically, all but the last digit is 0 and the last digit is 1.
+   Last digit is defined by scale. */
+
+char
+bc_is_near_zero (num, scale)
+     bc_num num;
+     int scale;
+{
+  int  count;
+  char *nptr;
+
+  /* Error checking */
+  if (scale > num->n_scale)
+    scale = num->n_scale;
+
+  /* Initialize */
+  count = num->n_len + scale;
+  nptr = num->n_value;
+
+  /* The check */
+  while ((count > 0) && (*nptr++ == 0)) count--;
+
+  if (count != 0 && (count != 1 || *--nptr != 1))
+    return FALSE;
+  else
+    return TRUE;
+}
+