X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=tomsfastmath%2Fsrc%2Faddsub%2Ffp_cmp_d.c;fp=tomsfastmath%2Fsrc%2Faddsub%2Ffp_cmp_d.c;h=c2fb2ec8ad7161bc28468ee6b5a052a5335bdefa;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/tomsfastmath/src/addsub/fp_cmp_d.c b/tomsfastmath/src/addsub/fp_cmp_d.c
new file mode 100644
index 0000000..c2fb2ec
--- /dev/null
+++ b/tomsfastmath/src/addsub/fp_cmp_d.c
@@ -0,0 +1,38 @@
+/* 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;
+  }
+
+}
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */