a

libmp/mpveccmp.c

@@ -0,0 +1,28 @@
+#include "os.h"
+#include <mp.h>
+#include "dat.h"
+
+// prereq: alen >= blen
+int
+mpveccmp(mpdigit *a, int alen, mpdigit *b, int blen)
+{
+	mpdigit x;
+
+	while(alen > blen)
+		if(a[--alen] != 0)
+			return 1;
+	while(blen > alen)
+		if(b[--blen] != 0)
+			return -1;
+	while(alen > 0){
+		--alen;
+		x = a[alen] - b[alen];
+		if(x == 0)
+			continue;
+		if(x > a[alen])
+			return -1;
+		else
+			return 1;
+	}
+	return 0;
+}