commit files needed for zpm-fetchurl

[zpackage] / tomsfastmath / src / bit / fp_rshd.c

diff --git a/tomsfastmath/src/bit/fp_rshd.c b/tomsfastmath/src/bit/fp_rshd.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>
+
+void fp_rshd(fp_int *a, int x)
+{
+  int y;
+
+  /* too many digits just zero and return */
+  if (x >= a->used) {
+     fp_zero(a);
+     return;
+  }
+
+   /* shift */
+   for (y = 0; y < a->used - x; y++) {
+      a->dp[y] = a->dp[y+x];
+   }
+
+   /* zero rest */
+   for (; y < a->used; y++) {
+      a->dp[y] = 0;
+   }
+   
+   /* decrement count */
+   a->used -= x;
+   fp_clamp(a);
+}
+
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */