commit files needed for zpm-fetchurl

[zpackage] / tomsfastmath / src / addsub / fp_cmp_d.c

diff --git a/tomsfastmath/src/addsub/fp_cmp_d.c b/tomsfastmath/src/addsub/fp_cmp_d.c
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+/* TomsFastMath, a fast ISO C bignum library.
+ * 
+ * This project is meant to fill in where LibTomMath
+ * falls short.  That is speed ;-)
+ *
+ * This project is public domain and free for all purposes.
+ * 
+ * Tom St Denis, tomstdenis@gmail.com
+ */
+#include <tfm_private.h>
+
+/* compare against a single digit */
+int fp_cmp_d(fp_int *a, fp_digit b)
+{
+  /* compare based on sign */
+  if ((b && a->used == 0) || a->sign == FP_NEG) {
+    return FP_LT;
+  }
+
+  /* compare based on magnitude */
+  if (a->used > 1) {
+    return FP_GT;
+  }
+
+  /* compare the only digit of a to b */
+  if (a->dp[0] > b) {
+    return FP_GT;
+  } else if (a->dp[0] < b) {
+    return FP_LT;
+  } else {
+    return FP_EQ;
+  }
+
+}
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */