Fix approxidate() to understand more extended numbers

[Linus Torvalds <torvalds@osdl.org>]

You can now say "5:35 PM yesterday", and approxidate() gets the right answer.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Useful? Of course. In a sick and twisted sort of way.

Try to say "yesterday at 5 PM" before and after this. It _really_ was 
confused before.

diff --git a/date.c b/date.c
index 4ff6604..db4c185 100644
--- a/date.c
+++ b/date.c
@@ -598,6 +598,32 @@ static void date_tea(struct tm *tm, int 
 	date_time(tm, 17);
 }
 
+static void date_pm(struct tm *tm, int *num)
+{
+	int hour = *num;
+	*num = 0;
+
+	if (hour > 0 && hour < 12) {
+		tm->tm_hour = hour;
+		tm->tm_min = 0;
+		tm->tm_sec = 0;
+	}
+	if (tm->tm_hour > 0 && tm->tm_hour < 12)
+		tm->tm_hour += 12;
+}
+
+static void date_am(struct tm *tm, int *num)
+{
+	int hour = *num;
+	*num = 0;
+
+	if (hour > 0 && hour < 12) {
+		tm->tm_hour = hour;
+		tm->tm_min = 0;
+		tm->tm_sec = 0;
+	}
+}
+
 static const struct special {
 	const char *name;
 	void (*fn)(struct tm *, int *);
@@ -606,6 +632,8 @@ static const struct special {
 	{ "noon", date_noon },
 	{ "midnight", date_midnight },
 	{ "tea", date_tea },
+	{ "PM", date_pm },
+	{ "AM", date_am },
 	{ NULL }
 };
 
@@ -717,6 +745,18 @@ static const char *approxidate_digit(con
 	char *end;
 	unsigned long number = strtoul(date, &end, 10);
 
+	switch (*end) {
+	case ':':
+	case '.':
+	case '/':
+	case '-':
+		if (isdigit(end[1])) {
+			int match = match_multi_number(number, *end, date, end, tm);
+			if (match)
+				return date + match;
+		}
+	}
+
 	*num = number;
 	return end;
 }