1 files changed, 80 insertions, 0 deletions
diff --git a/mpf/cmp_ui.c b/mpf/cmp_ui.c
new file mode 100644
index 000000000..3a4911ba7
--- /dev/null
+++ b/mpf/cmp_ui.c
@@ -0,0 +1,80 @@
+/* mpf_cmp_ui -- Compare a float with an unsigned integer.
+
+Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+int
+#if __STDC__
+mpf_cmp_ui (mpf_srcptr u, unsigned long int vlimb)
+#else
+mpf_cmp_ui (u, vlimb)
+     mpf_srcptr u;
+     unsigned long int vlimb;
+#endif
+{
+  mp_srcptr up;
+  mp_size_t usize;
+  mp_exp_t uexp;
+
+  uexp = u->_mp_exp;
+  usize = u->_mp_size;
+
+  /* 1. Is U negative?  */
+  if (usize < 0)
+    return -1;
+  /* We rely on usize being non-negative in the code that follows.  */
+
+  if (vlimb == 0)
+    return usize != 0;
+
+  /* 2. Are the exponents different (V's exponent == 1)?  */
+  if (uexp > 1)
+    return 1;
+  if (uexp < 1)
+    return -1;
+
+  up = u->_mp_d;
+
+#define STRICT_MPF_NORMALIZATION 0
+#if ! STRICT_MPF_NORMALIZATION
+  /* Ignore zeroes at the low end of U.  */
+  while (*up == 0)
+    {
+      up++;
+      usize--;
+    }
+#endif
+
+  /* 3. Now, if the number of limbs are different, we have a difference
+     since we have made sure the trailing limbs are not zero.  */
+  if (usize > 1)
+    return 1;
+
+  /* 4. Compare the mantissas.  */
+  if (*up > vlimb)
+    return 1;
+  else if (*up < vlimb)
+    return -1;
+
+  /* Wow, we got zero even if we tried hard to avoid it.  */
+  return 0;
+}