From 1289b48ee174bda5dc6266df1ed216f172fc5dd4 Mon Sep 17 00:00:00 2001
From: Jakub Martisko <jamartis@redhat.com>
Date: Wed, 7 Dec 2016 10:52:08 +0100
Subject: [PATCH] time/stfrtime_l.c: add lowercase support

* [BZ #15527]
* time/strftime_l.c (__strftime_internal): Implement conversion to
all lowercase.
* manual/time.texi: Document # and , flags.
* time/tst-strftime.c (do_test): Test case conversion.
---
 manual/time.texi    |  8 ++++++++
 time/strftime_l.c   |  4 +++-
 time/tst-strftime.c | 30 ++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/manual/time.texi b/manual/time.texi
index f94cbe4..39ed062 100644
--- a/manual/time.texi
+++ b/manual/time.texi
@@ -1352,6 +1352,14 @@ with spaces.
 @item ^
 The output uses uppercase characters, but only if this is possible
 (@pxref{Case Conversion}).
+
+@item #
+The output uses opposite case, but only if this is possible
+(@pxref{Case Conversion}).
+
+@item ,
+The output uses lowercase characters, but only if this is possible
+(@pxref{Case Conversion}).
 @end table
 
 The default action is to pad the number with zeros to keep it a constant
diff --git a/time/strftime_l.c b/time/strftime_l.c
index 1205035..6ed5f63 100644
--- a/time/strftime_l.c
+++ b/time/strftime_l.c
@@ -671,7 +671,9 @@ __strftime_internal (CHAR_T *s, size_t maxsize, const CHAR_T *format,
 	    case L_('#'):
 	      change_case = 1;
 	      continue;
-
+      case L_(','):
+  	      to_lowcase = 1;
+  	      continue;
 	    default:
 	      break;
 	    }
diff --git a/time/tst-strftime.c b/time/tst-strftime.c
index af3ff72..258d40a 100644
--- a/time/tst-strftime.c
+++ b/time/tst-strftime.c
@@ -154,6 +154,36 @@ do_test (void)
 	}
     }
 
+	const struct
+	  {
+	    const char *fmt;
+	    const char *exp;
+	    size_t n;
+	  } ctests[] =
+	    {
+	      { "%^A", "SUNDAY", 6 },
+	      { "%,A", "sunday", 6 },
+	      { "%A", "Sunday", 6 },
+	    };
+#define nctests (sizeof (ctests) / sizeof (ctests[0]))
+	  for (cnt = 0; cnt < nctests; ++cnt)
+    {
+      char buf[100];
+      size_t r = strftime (buf, sizeof (buf), ctests[cnt].fmt, &ttm);
+      if (r != ctests[cnt].n)
+	{
+	  printf ("strftime(\"%s\") returned %zu not %zu\n",
+		  ctests[cnt].fmt, r, ctests[cnt].n);
+	  result = 1;
+	}
+      if (strcmp (buf, ctests[cnt].exp) != 0)
+	{
+	  printf ("strftime(\"%s\") produced \"%s\" not \"%s\"\n",
+		  ctests[cnt].fmt, buf, ctests[cnt].exp);
+	  result = 1;
+	}
+    }
+
   return result + do_bz18985 ();
 }
 
-- 
2.5.5