tests: add interactive time conversion tryouts

Author: jengelh

tests/utiltest.cpp

@@ -5,6 +5,7 @@
 #include <climits>
 #include <cstdio>
 #include <cstdlib>
+#include <ctime>
 #include <limits>
 #include <libHX/endian.h>
 #include <libHX/string.h>
@@ -600,7 +601,7 @@ static int runner()
 	return EXIT_SUCCESS;
 }
 
-int main()
+int main(int argc, char **argv)
 {
 	static_assert(sizeof(cpu_to_le16(0)) == sizeof(uint16_t));
 	static_assert(sizeof(cpu_to_le32(0)) == sizeof(uint32_t));
@@ -614,6 +615,25 @@ int main()
 	static_assert(sizeof(be16_to_cpu(0)) == sizeof(uint16_t));
 	static_assert(sizeof(be32_to_cpu(0)) == sizeof(uint32_t));
 	static_assert(sizeof(be64_to_cpu(0)) == sizeof(uint64_t));
+	if (argc >= 3 && strcmp(argv[1], "nttime") == 0) {
+		auto nt = strtoll(argv[2], nullptr, 0);
+		auto ut = rop_util_nttime_to_unix(nt);
+		printf("...is unixtime %lld\n", static_cast<long long>(ut));
+		char buf[64];
+		auto tm = localtime(&ut);
+		strftime(buf, std::size(buf), "%FT%T", tm);
+		printf("...is calendar %s\n", buf);
+		return EXIT_SUCCESS;
+	} else if (argc >= 3 && strcmp(argv[1], "unixtime") == 0) {
+		time_t ut = strtoll(argv[2], nullptr, 0);
+		auto nt = rop_util_unix_to_nttime(ut);
+		printf("...is nttime %lld\n", static_cast<long long>(nt));
+		char buf[64];
+		auto tm = localtime(&ut);
+		strftime(buf, std::size(buf), "%FT%T", tm);
+		printf("...is calendar %s\n", buf);
+		return EXIT_SUCCESS;
+	}
 	auto ret = runner();
 	if (ret != EXIT_SUCCESS)
 		printf("FAILED\n");