add numerical recipes library

lib/nr/ansi/examples/xpsdes.c

@@ -0,0 +1,27 @@
+
+/* Driver for routine psdes */
+
+#include <stdio.h>
+#define NRANSI
+#include "nr.h"
+
+int main(void)
+{
+	static unsigned long lword[5]={0,1,1,99,99};
+	static unsigned long irword[5]={0,1,99,1,99};
+	static char *ans[5]={
+		"",
+		"0x604d1dce 0x509c0c23",
+		"0xd97f8571 0xa66cb41a",
+		"0x7822309d 0x64300984",
+		"0xd7f376f0 0x59ba89eb"};
+	int i;
+
+	for (i=1;i<=4;i++) {
+		psdes(&lword[i],&irword[i]);
+		printf("PSDES now calculates:       0x%x 0x%x\n",lword[i],irword[i]);
+		printf("Known correct answers are:  %s\n",ans[i]);
+	}
+	return 0;
+}
+#undef NRANSI