add cfrac benchmark

1 files changed, 31 insertions, 0 deletions

diff --git a/src/benchmarks/cfrac/ptou.c b/src/benchmarks/cfrac/ptou.c
new file mode 100644
index 0000000..b8ca07b
--- /dev/null
+++ b/src/benchmarks/cfrac/ptou.c
@@ -0,0 +1,31 @@
+#include "pdefs.h"
+#include "pcvt.h"
+#include "precision.h"
+
+/*
+ *  Precision to unsigned
+ */
+unsigned int ptou(u)
+   precision u;
+{
+   register digitPtr uPtr;
+   register accumulator temp;
+
+   (void) pparm(u);
+   if (u->sign) {
+      temp = (unsigned long) errorp(PDOMAIN, "ptou", "negative argument");
+   } else {
+      uPtr = u->value + u->size;
+      temp = 0;
+      do {
+	 if (temp > divBase(MAXUNSIGNED - *--uPtr)) {
+	    temp = (unsigned long) errorp(POVERFLOW, "ptou", "overflow");
+	    break;
+	 }
+	 temp  = mulBase(temp);
+	 temp += *uPtr;
+      } while (uPtr > u->value);
+   }
+   pdestroy(u);
+   return (unsigned int) temp;
+}