Merge branch 'js/larger-timestamps'

Some platforms have ulong that is smaller than time_t, and our
historical use of ulong for timestamp would mean they cannot
represent some timestamp that the platform allows.  Invent a
separate and dedicated timestamp_t (so that we can distingiuish
timestamps and a vanilla ulongs, which along is already a good
move), and then declare uintmax_t is the type to be used as the
timestamp_t.

* js/larger-timestamps:
  archive-tar: fix a sparse 'constant too large' warning
  use uintmax_t for timestamps
  date.c: abort if the system time cannot handle one of our timestamps
  timestamp_t: a new data type for timestamps
  PRItime: introduce a new "printf format" for timestamps
  parse_timestamp(): specify explicitly where we parse timestamps
  t0006 & t5000: skip "far in the future" test when time_t is too limited
  t0006 & t5000: prepare for 64-bit timestamps
  ref-filter: avoid using `unsigned long` for catch-all data type

3 files changed, 16 insertions, 10 deletions

diff --git a/t/helper/test-date.c b/t/helper/test-date.c
index 506054bcd..f414a3ac6 100644
--- a/t/helper/test-date.c
+++ b/t/helper/test-date.c
@@ -4,7 +4,9 @@ static const char *usage_msg = "\n"
 "  test-date relative [time_t]...\n"
 "  test-date show:<format> [time_t]...\n"
 "  test-date parse [date]...\n"
-"  test-date approxidate [date]...\n";
+"  test-date approxidate [date]...\n"
+"  test-date is64bit\n"
+"  test-date time_t-is64bit\n";
 
 static void show_relative_dates(const char **argv, struct timeval *now)
 {
@@ -25,14 +27,14 @@ static void show_dates(const char **argv, const char *format)
 	parse_date_format(format, &mode);
 	for (; *argv; argv++) {
 		char *arg;
-		time_t t;
+		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 = strtol(*argv, &arg, 10);
+		t = parse_timestamp(*argv, &arg, 10);
 		while (*arg == ' ')
 			arg++;
 		tz = atoi(arg);
@@ -46,12 +48,12 @@ static void parse_dates(const char **argv, struct timeval *now)
 	struct strbuf result = STRBUF_INIT;
 
 	for (; *argv; argv++) {
-		unsigned long t;
+		timestamp_t t;
 		int tz;
 
 		strbuf_reset(&result);
 		parse_date(*argv, &result);
-		if (sscanf(result.buf, "%lu %d", &t, &tz) == 2)
+		if (sscanf(result.buf, "%"PRItime" %d", &t, &tz) == 2)
 			printf("%s -> %s\n",
 			       *argv, show_date(t, tz, DATE_MODE(ISO8601)));
 		else
@@ -63,7 +65,7 @@ static void parse_dates(const char **argv, struct timeval *now)
 static void parse_approxidate(const char **argv, struct timeval *now)
 {
 	for (; *argv; argv++) {
-		time_t t;
+		timestamp_t t;
 		t = approxidate_relative(*argv, now);
 		printf("%s -> %s\n", *argv, show_date(t, 0, DATE_MODE(ISO8601)));
 	}
@@ -93,6 +95,10 @@ int cmd_main(int argc, const char **argv)
 		parse_dates(argv+1, &now);
 	else if (!strcmp(*argv, "approxidate"))
 		parse_approxidate(argv+1, &now);
+	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;
diff --git a/t/helper/test-parse-options.c b/t/helper/test-parse-options.c
index a01430c24..75fe883aa 100644
--- a/t/helper/test-parse-options.c
+++ b/t/helper/test-parse-options.c
@@ -5,7 +5,7 @@
 static int boolean = 0;
 static int integer = 0;
 static unsigned long magnitude = 0;
-static unsigned long timestamp;
+static timestamp_t timestamp;
 static int abbrev = 7;
 static int verbose = -1; /* unspecified */
 static int dry_run = 0, quiet = 0;
@@ -161,7 +161,7 @@ int cmd_main(int argc, const char **argv)
 	show(&expect, &ret, "boolean: %d", boolean);
 	show(&expect, &ret, "integer: %d", integer);
 	show(&expect, &ret, "magnitude: %lu", magnitude);
-	show(&expect, &ret, "timestamp: %lu", timestamp);
+	show(&expect, &ret, "timestamp: %"PRItime, timestamp);
 	show(&expect, &ret, "string: %s", string ? string : "(not set)");
 	show(&expect, &ret, "abbrev: %d", abbrev);
 	show(&expect, &ret, "verbose: %d", verbose);
diff --git a/t/helper/test-ref-store.c b/t/helper/test-ref-store.c
index 4a487c014..fba85e7da 100644
--- a/t/helper/test-ref-store.c
+++ b/t/helper/test-ref-store.c
@@ -156,10 +156,10 @@ static int cmd_for_each_reflog(struct ref_store *refs, const char **argv)
 }
 
 static int each_reflog(struct object_id *old_oid, struct object_id *new_oid,
-		       const char *committer, unsigned long timestamp,
+		       const char *committer, timestamp_t timestamp,
 		       int tz, const char *msg, void *cb_data)
 {
-	printf("%s %s %s %lu %d %s\n",
+	printf("%s %s %s %"PRItime" %d %s\n",
 	       oid_to_hex(old_oid), oid_to_hex(new_oid),
 	       committer, timestamp, tz, msg);
 	return 0;