--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netdiff/match/pindiff.c	Sun Nov 15 04:11:01 2020 +0000
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "struct.h"
+
+char *infnames[2];
+struct pin_info *database;
+
+write_diffs_report()
+{
+	struct pin_info *p;
+
+	for (p = database; p; p = p->next) {
+		if (p->netnames[0] && !p->netnames[1])
+			printf("Pin %s only in %s: net %s\n", p->pin_name,
+				infnames[0], p->netnames[0]);
+		if (!p->netnames[0] && p->netnames[1])
+			printf("Pin %s only in %s: net %s\n", p->pin_name,
+				infnames[1], p->netnames[1]);
+	}
+}
+
+main(argc, argv)
+	char **argv;
+{
+	int i;
+
+	if (argc != 3) {
+		fprintf(stderr, "usage: %s net1 net2\n", argv[0]);
+		exit(1);
+	}
+	infnames[0] = argv[1];
+	infnames[1] = argv[2];
+	for (i = 0; i < 2; i++)
+		read_pass(i);
+	write_diffs_report();
+	exit(0);
+}