[PATCH][BZ 15527] strftime_l.c: Support lowercase output

[Jakub Martisko <jamartis@redhat.com>]

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strftime_l.c doe not provide easy way to produce lowercase output. While 
the function to create lowercase is implemented, there is no flag which 
would cause it to be called. Provided patch checks, whether combination 
of to_uppcase and change_case flags is used and sets to_lowcase if both 
of them are set which leads to lower case output.


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2016-05-12  Jakub Martisko  <jamartis@redhat.com>

	* [BZ #15527]
	* time/strftime_l.c (__strftime_internal): Implement conversion to
	all lowercase.
	* manual/time.texi: Document # flag.
	* time/tst-strftime.c (do_test): Test case conversion.



---
 manual/time.texi    |  6 +++++-
 time/strftime_l.c   |  7 ++++++-
 time/tst-strftime.c | 31 ++++++++++++++++++++++++++++++-
 3 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/manual/time.texi b/manual/time.texi
index f94cbe4..a65959f 100644
--- a/manual/time.texi
+++ b/manual/time.texi
@@ -1350,7 +1350,11 @@ The number is padded with zeros even if the format specifies padding
 with spaces.
 
 @item ^
-The output uses uppercase characters, but only if this is possible
+The output uses uppercase characters, but only if this is possible.
+
+@item #
+The output uses opposite case characters, but only if this is possible.
+Can be combined with @samp{^} to produce lowercase characters.
 (@pxref{Case Conversion}).
 @end table
 
diff --git a/time/strftime_l.c b/time/strftime_l.c
index 1205035..c577f28 100644
--- a/time/strftime_l.c
+++ b/time/strftime_l.c
@@ -677,7 +677,12 @@ __strftime_internal (CHAR_T *s, size_t maxsize, const CHAR_T *format,
 	    }
 	  break;
 	}
-
+	if (to_uppcase == 1 && change_case == 1)
+	{
+	  to_uppcase = 0;
+	  change_case = 0;
+	  to_lowcase = 1;
+	}
       /* As a GNU extension we allow to specify the field width.  */
       if (ISDIGIT (*f))
 	{
diff --git a/time/tst-strftime.c b/time/tst-strftime.c
index af3ff72..e369595 100644
--- a/time/tst-strftime.c
+++ b/time/tst-strftime.c
@@ -153,7 +153,36 @@ do_test (void)
 	  result = 1;
 	}
     }
-
+  /*case tests*/
+	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 ();
 }
 
-- 
2.5.0