1 files changed, 141 insertions, 0 deletions
diff --git a/third_party/git/t/helper/test-date.c b/third_party/git/t/helper/test-date.c
new file mode 100644
index 000000000000..585347ea487a
--- /dev/null
+++ b/third_party/git/t/helper/test-date.c
@@ -0,0 +1,141 @@
+#include "test-tool.h"
+#include "cache.h"
+
+static const char *usage_msg = "\n"
+"  test-tool date relative [time_t]...\n"
+"  test-tool date human [time_t]...\n"
+"  test-tool date show:<format> [time_t]...\n"
+"  test-tool date parse [date]...\n"
+"  test-tool date approxidate [date]...\n"
+"  test-tool date timestamp [date]...\n"
+"  test-tool date getnanos [start-nanos]\n"
+"  test-tool date is64bit\n"
+"  test-tool date time_t-is64bit\n";
+
+static void show_relative_dates(const char **argv, struct timeval *now)
+{
+	struct strbuf buf = STRBUF_INIT;
+
+	for (; *argv; argv++) {
+		time_t t = atoi(*argv);
+		show_date_relative(t, now, &buf);
+		printf("%s -> %s\n", *argv, buf.buf);
+	}
+	strbuf_release(&buf);
+}
+
+static void show_human_dates(const char **argv)
+{
+	for (; *argv; argv++) {
+		time_t t = atoi(*argv);
+		printf("%s -> %s\n", *argv, show_date(t, 0, DATE_MODE(HUMAN)));
+	}
+}
+
+static void show_dates(const char **argv, const char *format)
+{
+	struct date_mode mode;
+
+	parse_date_format(format, &mode);
+	for (; *argv; argv++) {
+		char *arg;
+		timestamp_t t;
+		int tz;
+
+		/*
+		 * Do not use our normal timestamp parsing here, as the point
+		 * is to test the formatting code in isolation.
+		 */
+		t = parse_timestamp(*argv, &arg, 10);
+		while (*arg == ' ')
+			arg++;
+		tz = atoi(arg);
+
+		printf("%s -> %s\n", *argv, show_date(t, tz, &mode));
+	}
+}
+
+static void parse_dates(const char **argv)
+{
+	struct strbuf result = STRBUF_INIT;
+
+	for (; *argv; argv++) {
+		timestamp_t t;
+		int tz;
+
+		strbuf_reset(&result);
+		parse_date(*argv, &result);
+		if (sscanf(result.buf, "%"PRItime" %d", &t, &tz) == 2)
+			printf("%s -> %s\n",
+			       *argv, show_date(t, tz, DATE_MODE(ISO8601)));
+		else
+			printf("%s -> bad\n", *argv);
+	}
+	strbuf_release(&result);
+}
+
+static void parse_approxidate(const char **argv, struct timeval *now)
+{
+	for (; *argv; argv++) {
+		timestamp_t t;
+		t = approxidate_relative(*argv, now);
+		printf("%s -> %s\n", *argv, show_date(t, 0, DATE_MODE(ISO8601)));
+	}
+}
+
+static void parse_approx_timestamp(const char **argv, struct timeval *now)
+{
+	for (; *argv; argv++) {
+		timestamp_t t;
+		t = approxidate_relative(*argv, now);
+		printf("%s -> %"PRItime"\n", *argv, t);
+	}
+}
+
+static void getnanos(const char **argv)
+{
+	double seconds = getnanotime() / 1.0e9;
+
+	if (*argv)
+		seconds -= strtod(*argv, NULL);
+	printf("%lf\n", seconds);
+}
+
+int cmd__date(int argc, const char **argv)
+{
+	struct timeval now;
+	const char *x;
+
+	x = getenv("GIT_TEST_DATE_NOW");
+	if (x) {
+		now.tv_sec = atoi(x);
+		now.tv_usec = 0;
+	}
+	else
+		gettimeofday(&now, NULL);
+
+	argv++;
+	if (!*argv)
+		usage(usage_msg);
+	if (!strcmp(*argv, "relative"))
+		show_relative_dates(argv+1, &now);
+	else if (!strcmp(*argv, "human"))
+		show_human_dates(argv+1);
+	else if (skip_prefix(*argv, "show:", &x))
+		show_dates(argv+1, x);
+	else if (!strcmp(*argv, "parse"))
+		parse_dates(argv+1);
+	else if (!strcmp(*argv, "approxidate"))
+		parse_approxidate(argv+1, &now);
+	else if (!strcmp(*argv, "timestamp"))
+		parse_approx_timestamp(argv+1, &now);
+	else if (!strcmp(*argv, "getnanos"))
+		getnanos(argv+1);
+	else if (!strcmp(*argv, "is64bit"))
+		return sizeof(timestamp_t) == 8 ? 0 : 1;
+	else if (!strcmp(*argv, "time_t-is64bit"))
+		return sizeof(time_t) == 8 ? 0 : 1;
+	else
+		usage(usage_msg);
+	return 0;
+}