From d7daf7444e175ba8ceb752b6ee09a35ff72e8920 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Thu, 23 Dec 1993 00:08:23 +0000
Subject: .

---
 src/date.c | 2 +-
 src/expr.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/date.c b/src/date.c
index 08998b2e1..b6159f209 100644
--- a/src/date.c
+++ b/src/date.c
@@ -64,7 +64,6 @@
 #endif
 
 #ifndef STDC_HEADERS
-time_t mktime ();
 size_t strftime ();
 time_t time ();
 #endif
@@ -269,6 +268,7 @@ FORMAT controls the output.  Interpreted sequences are:\n\
   %%n   a newline\n\
   %%p   locale's AM or PM\n\
   %%r   time, 12-hour (hh:mm:ss [AP]M)\n\
+  %%s   seconds since 00:00:00, Jan 1, 1970 (a nonstandard extension)\n\
   %%t   a horizontal tab\n\
   %%w   day of week (0..6)\n\
   %%x   locale's date representation (mm/dd/yy)\n\
diff --git a/src/expr.c b/src/expr.c
index e5549140f..a3d42ff4c 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -316,6 +316,9 @@ toarith (v)
     case string:
       i = 0;
       cp = v->u.s;
+      /* Don't interpret the empty string as an integer.  */
+      if (*cp == 0)
+	return 0;
       neg = (*cp == '-');
       if (neg)
 	cp++;
-- 
cgit v1.2.3-70-g09d2