[PATCH 1/2] pass TIME_DATE_NOW to approxidate future-check

[Jeff King <peff@peff.net>]

The approxidate functions accept an extra "now" parameter to
avoid calling time() themselves. We use this in our test
suite to make sure we have a consistent time for computing
relative dates. However, deep in the bowels of approxidate,
we also call time() to check whether possible dates are far
in the future. Let's make sure that the "now" override makes
it to that spot, too, so we can consistently test that
feature.

Signed-off-by: Jeff King <peff@peff.net>
---
This code path also gets called from the more-strict parse_date (which
does not know about the current time). This continues to call time()
dynamically, but it is not clear to me if that ever actually matters in
practice.

 date.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/date.c b/date.c
index 59dfe57..e1a4d49 100644
--- a/date.c
+++ b/date.c
@@ -405,9 +405,9 @@ static int is_date(int year, int month, int day, struct tm *now_tm, time_t now,
 	return 0;
 }
 
-static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm)
+static int match_multi_number(unsigned long num, char c, const char *date,
+			      char *end, struct tm *tm, time_t now)
 {
-	time_t now;
 	struct tm now_tm;
 	struct tm *refuse_future;
 	long num2, num3;
@@ -433,7 +433,8 @@ static int match_multi_number(unsigned long num, char c, const char *date, char
 	case '-':
 	case '/':
 	case '.':
-		now = time(NULL);
+		if (!now)
+			now = time(NULL);
 		refuse_future = NULL;
 		if (gmtime_r(&now, &now_tm))
 			refuse_future = &now_tm;
@@ -513,7 +514,7 @@ static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt
 	case '/':
 	case '-':
 		if (isdigit(end[1])) {
-			int match = match_multi_number(num, *end, date, end, tm);
+			int match = match_multi_number(num, *end, date, end, tm, 0);
 			if (match)
 				return match;
 		}
@@ -1013,7 +1014,8 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
 	return end;
 }
 
-static const char *approxidate_digit(const char *date, struct tm *tm, int *num)
+static const char *approxidate_digit(const char *date, struct tm *tm, int *num,
+				     time_t now)
 {
 	char *end;
 	unsigned long number = strtoul(date, &end, 10);
@@ -1024,7 +1026,8 @@ static const char *approxidate_digit(const char *date, struct tm *tm, int *num)
 	case '/':
 	case '-':
 		if (isdigit(end[1])) {
-			int match = match_multi_number(number, *end, date, end, tm);
+			int match = match_multi_number(number, *end, date, end,
+						       tm, now);
 			if (match)
 				return date + match;
 		}
@@ -1087,7 +1090,7 @@ static unsigned long approxidate_str(const char *date,
 		date++;
 		if (isdigit(c)) {
 			pending_number(&tm, &number);
-			date = approxidate_digit(date-1, &tm, &number);
+			date = approxidate_digit(date-1, &tm, &number, time_sec);
 			touched = 1;
 			continue;
 		}
-- 
2.1.2.596.g7379948